IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 1 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. AVERAGE OF MEAN DAILY TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MAX-MIN 1964 4.1 6.6 8.4 13.1 17.3 ****** ****** ****** ****** 16.2 15.8 7.4 ****** 1965 6.4 9.1 8.1 11.2 15.8 19.4 20.3 19.9 18.0 15.3 13.4 12.0 13.9 1966 12.8 9.8 ****** 15.0 18.1 23.3 25.0 26.8 21.8 17.6 15.0 12.5 ****** 1967 10.0 5.8 8.6 12.2 20.4 22.0 24.3 26.2 21.4 18.7 15.1 11.1 20.4 1968 9.7 ****** 9.5 12.9 20.6 21.7 25.1 25.4 23.3 19.8 14.3 10.0 ****** 1969 5.2 3.6 6.6 12.0 17.8 23.6 22.0 23.9 21.2 18.0 11.5 10.9 20.3 1970 8.0 10.9 11.0 15.1 20.7 22.5 25.3 25.2 21.5 18.1 15.4 10.2 17.3 1971 7.7 8.1 11.3 13.5 20.8 22.8 26.4 25.5 24.6 18.6 14.9 10.7 18.7 1972 3.8 1.0 6.1 14.3 16.2 21.8 25.3 24.5 23.1 19.8 12.9 5.8 24.3 1973 3.1 8.7 10.0 15.3 ****** 21.7 22.3 25.2 20.8 18.4 12.7 9.9 ****** 1974 5.0 5.3 7.5 9.6 17.8 20.6 22.4 20.9 15.9 19.3 11.1 ****** ****** 1975 ****** ****** ****** ****** 20.2 23.6 26.1 23.5 21.8 16.7 ****** 8.2 ****** 1976 8.8 ****** 5.5 14.6 16.9 22.3 24.1 26.9 24.5 17.4 14.4 10.0 ****** 1977 3.5 8.3 10.4 16.1 18.7 22.8 25.5 25.6 22.7 ****** 15.4 ****** ****** 1978 ****** 8.9 12.7 15.6 16.4 19.5 25.3 24.6 24.1 21.1 11.2 13.8 ****** 1979 8.9 12.9 12.6 17.2 19.3 22.6 26.0 26.2 24.8 20.0 18.4 14.5 17.3 1980 ****** ****** 9.9 15.7 22.8 23.6 26.6 26.5 22.6 16.4 13.8 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 7.5 5.7 8.8 15.9 18.7 22.5 25.8 24.4 23.4 16.4 9.9 7.7 20.1 1983 ****** 9.4 9.7 15.7 21.0 22.7 26.6 24.8 21.3 16.9 15.2 8.7 ****** 1984 7.9 3.4 7.9 14.3 18.7 22.5 26.6 24.2 22.6 18.4 13.4 5.6 23.2 1985 6.0 7.9 5.4 15.1 20.5 24.3 24.6 26.1 23.4 17.1 13.9 8.8 20.7 1986 8.9 7.5 6.7 14.4 18.5 22.9 25.6 26.0 24.3 17.5 11.6 8.3 19.3 1987 9.7 8.2 8.7 11.1 19.1 24.3 25.1 25.0 20.8 13.3 11.6 9.3 16.9 1988 6.2 6.8 11.4 15.7 18.0 25.0 25.6 24.0 21.7 18.0 13.3 11.3 19.4 1989 6.4 6.4 11.7 15.2 19.2 23.7 25.7 25.2 21.4 17.9 15.1 11.2 19.3 1990 7.3 9.9 13.1 14.5 17.9 23.4 26.1 24.0 22.3 20.4 20.8 17.8 18.8 1991 8.9 8.5 10.5 13.1 15.5 21.8 23.8 21.8 20.9 19.8 13.9 11.4 15.3 1992 7.6 7.1 8.5 12.0 13.9 19.7 19.7 21.5 20.5 17.4 14.9 12.0 14.4 1993 9.5 6.8 10.2 13.3 15.9 19.5 22.2 22.4 20.8 16.8 8.9 8.4 15.6 1994 9.5 6.7 12.6 16.1 19.0 19.8 24.6 22.1 18.8 15.6 10.7 6.9 17.9 1995 8.0 7.8 9.6 15.5 19.8 23.7 25.0 25.8 23.0 16.7 15.0 8.6 18.0 1996 6.1 7.5 7.2 12.3 19.7 21.8 25.4 25.8 23.6 18.6 12.8 12.6 19.7 1997 8.8 5.8 8.2 15.4 19.8 23.5 24.8 26.0 20.3 20.2 12.9 9.5 20.2 1998 6.0 5.6 10.7 16.0 19.5 24.9 25.4 26.4 21.7 18.0 14.8 10.7 20.8 1999 8.2 11.3 10.1 13.9 17.4 22.1 24.4 27.7 22.1 18.4 11.8 10.4 19.5 2000 7.8 7.2 8.9 17.2 18.2 21.6 26.1 26.6 22.6 16.0 11.9 9.5 19.4 2001 6.6 9.4 12.0 15.1 19.3 22.7 24.9 26.1 22.9 17.7 13.5 11.2 19.5 2002 7.6 9.8 12.6 13.2 16.9 22.6 26.1 25.9 24.1 20.8 14.1 5.5 20.6 2003 8.6 7.6 7.2 12.1 18.0 21.3 24.3 25.4 21.7 20.5 13.1 10.3 18.2 MEAN 7.4 7.6 9.5 14.2 18.5 22.4 24.7 24.8 22.0 18.0 13.6 10.1 17.4 SD 2.08 2.32 2.12 1.78 1.81 1.47 1.66 1.79 1.83 1.69 2.22 2.50 1.94 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 2 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. AVERAGE OF MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 -1.0 1.7 4.7 7.1 9.0 ****** ****** ****** ****** 8.3 7.8 2.8 ****** 1965 1.0 2.5 3.4 3.9 6.7 9.1 9.8 9.6 9.2 10.7 7.4 4.7 6.5 1966 4.5 4.2 ****** 8.8 12.5 17.5 18.1 21.7 17.9 13.5 10.8 7.8 ****** 1967 4.3 2.1 3.3 6.0 14.5 16.7 19.5 20.9 17.5 14.3 11.3 5.9 11.4 1968 4.1 ****** 4.6 8.4 14.8 17.1 20.3 20.9 17.7 15.2 10.2 5.6 ****** 1969 1.9 0.8 4.1 7.3 12.5 17.1 15.2 18.2 15.1 12.6 6.1 5.8 9.7 1970 3.5 5.2 6.3 9.0 14.8 17.5 19.8 20.4 17.4 13.7 10.9 5.5 12.0 1971 2.4 3.3 6.5 7.9 15.6 16.9 20.4 19.8 18.8 13.6 9.8 5.5 11.7 1972 0.2 -3.8 -0.3 5.8 8.8 14.3 18.7 18.1 17.8 14.9 6.5 0.4 8.5 1973 -3.1 1.3 3.7 9.2 ****** 17.3 15.8 21.2 17.2 14.2 7.6 3.5 ****** 1974 1.4 2.1 3.2 3.1 11.2 13.0 16.8 16.7 13.0 13.2 7.1 ****** ****** 1975 ****** ****** ****** ****** 14.5 17.7 19.8 17.2 17.3 13.1 ****** 3.7 ****** 1976 3.5 ****** 1.5 8.8 11.8 17.6 19.4 22.0 18.8 13.0 8.6 5.2 ****** 1977 -1.1 2.4 4.9 8.9 13.7 17.3 20.7 20.4 17.2 10.4 8.5 4.0 10.6 1978 4.0 3.8 5.2 8.0 9.9 13.1 19.6 19.6 17.5 13.7 4.4 5.9 10.4 1979 3.2 4.2 5.0 9.9 13.4 17.0 20.9 19.9 18.2 14.8 9.5 5.8 11.8 1980 ****** ****** 3.3 9.0 13.8 16.7 19.7 18.8 16.3 11.9 9.2 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 3.2 1.0 4.3 10.5 14.9 17.9 21.1 19.5 18.6 12.6 6.5 2.2 11.0 1983 ****** 3.4 4.3 9.8 16.0 18.8 21.7 21.3 17.6 12.6 11.1 5.0 ****** 1984 4.1 0.8 5.8 10.5 13.7 18.1 21.9 20.6 18.8 13.5 9.8 1.9 11.6 1985 2.0 2.8 1.9 10.3 15.2 19.6 20.8 20.7 19.3 13.5 10.3 5.4 11.8 1986 3.6 3.3 3.2 10.0 13.9 17.5 20.5 20.8 19.2 13.9 8.3 3.2 11.5 1987 5.0 3.9 5.7 6.6 14.1 18.6 20.2 20.9 16.1 10.2 7.7 4.5 11.1 1988 2.4 2.0 5.0 9.6 13.2 19.5 20.9 19.8 17.8 14.1 8.2 6.1 11.5 1989 1.2 1.2 6.5 9.0 13.0 17.9 20.5 19.9 16.2 12.5 9.7 5.7 11.1 1990 2.0 3.4 7.0 8.3 11.7 17.4 20.1 17.9 16.6 15.0 14.7 12.2 12.2 1991 4.3 3.6 6.0 9.5 10.6 14.3 17.3 15.9 15.9 16.1 10.0 7.0 10.9 1992 2.3 2.7 4.1 8.2 9.8 12.7 13.7 16.5 15.7 12.6 10.7 7.9 9.7 1993 4.8 1.9 6.0 8.2 11.0 13.3 15.9 16.3 15.8 12.1 5.5 3.8 9.6 1994 4.0 1.8 7.5 9.6 12.9 14.7 18.6 15.4 10.8 8.5 3.8 3.1 9.2 1995 3.4 3.3 4.9 9.8 14.4 18.5 20.9 21.8 18.5 13.1 9.5 4.2 11.9 1996 3.5 4.2 4.9 8.5 14.8 17.8 20.7 21.1 19.3 14.2 9.3 7.7 12.2 1997 4.6 1.5 3.7 9.6 14.4 19.9 21.5 22.0 17.1 15.5 9.1 5.0 12.0 1998 2.6 0.9 6.2 10.7 14.2 19.4 20.6 21.9 18.8 13.7 11.1 7.2 12.3 1999 3.3 5.0 6.2 9.0 12.7 17.0 19.4 23.2 18.4 14.1 7.4 5.0 11.7 2000 4.1 2.3 4.1 11.4 13.7 16.4 20.4 21.9 19.2 13.0 8.6 5.5 11.7 2001 2.9 4.0 6.3 9.9 14.6 17.8 20.1 21.3 19.1 14.2 8.8 7.4 12.2 2002 3.6 4.2 7.0 10.3 12.9 17.8 20.8 21.7 19.4 16.5 9.7 2.2 12.2 2003 3.8 4.3 4.3 7.8 11.9 16.9 20.0 20.4 18.1 15.6 9.3 5.8 11.5 MEAN 2.8 2.6 4.7 8.6 12.9 16.8 19.3 19.6 17.2 13.3 8.8 5.1 11.0 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 3 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. AVERAGE OF MAXIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 9.1 11.6 12.3 18.9 25.6 30.7 30.8 30.5 27.6 24.0 23.8 13.0 21.5 1965 11.8 15.6 12.9 18.5 24.9 29.7 30.7 30.2 26.9 19.8 19.3 19.3 21.6 1966 21.1 15.5 ****** 21.2 23.7 29.2 31.9 31.9 25.8 21.6 19.3 17.2 ****** 1967 15.8 9.5 14.0 18.3 26.3 27.3 29.0 31.5 25.2 23.0 19.0 16.2 21.3 1968 15.3 12.7 14.5 17.4 26.3 26.3 30.0 29.9 28.9 24.4 18.3 14.5 21.5 1969 8.4 6.5 9.2 16.7 23.0 30.0 28.7 29.6 27.2 23.4 17.0 16.1 19.6 1970 12.6 16.7 15.7 21.2 26.7 27.6 30.8 30.0 25.6 22.5 19.9 14.8 22.0 1971 12.9 13.0 16.1 19.5 26.1 28.6 32.4 31.1 30.4 23.7 19.9 15.9 22.5 1972 7.4 5.8 12.6 22.7 23.5 29.2 31.8 30.9 28.5 24.7 19.3 11.2 20.6 1973 9.3 16.1 16.4 21.4 ****** 26.0 29.3 29.3 24.4 22.6 17.8 16.4 ****** 1974 8.7 8.6 11.7 16.2 24.5 28.1 28.0 25.0 18.9 25.3 15.1 13.9 18.7 1975 12.3 11.7 14.3 21.5 24.8 29.5 32.5 29.9 26.2 20.3 ****** 12.7 ****** 1976 14.1 ****** 9.6 20.4 22.0 26.9 28.9 31.7 30.2 21.9 20.2 14.8 ****** 1977 8.2 14.3 16.0 23.2 23.7 28.3 30.3 30.7 28.2 ****** 22.3 ****** ****** 1978 ****** 14.1 19.9 23.3 22.9 26.0 31.0 29.7 30.7 28.5 17.9 21.7 ****** 1979 14.6 21.8 20.2 24.7 25.1 28.2 31.1 32.4 31.4 25.1 27.2 23.2 25.4 1980 ****** ****** 16.5 22.6 31.8 31.0 33.4 34.2 28.6 21.2 18.4 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 12.4 9.8 12.8 20.8 22.4 26.2 30.5 28.5 27.9 20.0 12.6 13.2 19.7 1983 ****** 15.4 15.1 21.4 25.8 26.6 31.6 27.7 24.7 21.3 18.9 13.1 ****** 1984 11.7 5.9 10.2 18.4 22.7 26.7 31.5 27.2 26.4 22.9 17.1 8.4 19.1 1985 10.8 12.7 9.2 19.9 25.4 29.0 28.2 30.9 27.0 20.2 17.4 12.1 20.2 1986 14.1 11.9 10.2 19.5 23.0 28.3 30.7 31.3 29.2 21.0 15.0 13.6 20.7 1987 14.5 12.3 11.8 16.0 24.8 30.1 30.0 29.0 25.5 16.7 15.9 14.0 20.1 1988 10.0 11.7 17.8 21.9 22.9 30.4 30.3 28.1 25.6 21.9 18.4 16.5 21.3 1989 11.3 11.1 16.9 21.7 25.4 29.7 31.0 30.5 26.7 23.4 20.6 16.7 22.1 1990 12.5 16.4 19.1 20.6 24.1 29.4 32.0 30.0 28.0 25.7 26.9 23.5 24.0 1991 13.3 13.4 15.1 16.6 20.4 29.3 30.3 27.6 25.9 23.4 17.8 15.8 20.8 1992 12.9 11.7 12.6 15.8 17.9 26.7 25.6 26.5 25.0 22.1 19.3 16.1 19.4 1993 14.1 11.6 14.4 18.5 20.8 25.7 28.4 28.5 25.8 21.4 12.3 13.1 19.5 1994 15.0 11.6 17.8 22.6 25.0 24.9 30.6 28.8 26.8 22.7 17.6 10.8 21.2 1995 12.6 12.2 14.3 21.2 25.3 29.0 29.5 30.1 27.5 20.4 20.6 13.0 21.3 1996 8.8 11.0 9.5 16.0 24.7 25.8 30.1 30.6 27.8 23.0 16.4 17.5 20.1 1997 12.9 10.1 12.7 21.4 25.0 27.2 28.1 30.1 23.5 24.8 16.7 14.4 20.6 1998 9.4 10.3 15.3 21.3 24.8 30.3 30.2 30.8 24.7 22.3 18.5 14.1 21.0 1999 13.1 17.5 14.0 18.8 22.1 27.2 29.3 32.2 25.8 22.8 16.2 15.7 21.2 2000 11.5 12.2 13.6 23.0 22.8 26.8 31.7 31.2 26.0 19.0 15.1 13.5 20.5 2001 10.3 14.7 17.7 20.2 23.9 27.6 29.7 30.9 26.7 21.2 18.2 14.9 21.4 2002 11.5 15.3 18.1 16.1 20.9 27.4 31.4 30.0 28.9 25.1 18.4 8.9 21.0 2003 13.3 11.0 10.1 16.5 24.1 25.7 28.7 30.4 25.4 25.3 16.9 14.8 20.2 MEAN 12.2 12.5 14.2 19.9 24.1 28.0 30.3 30.0 26.8 22.6 18.5 15.0 21.2 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 4 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 10.1 9.9 7.6 11.8 16.6 ****** ****** ****** ****** 15.7 16.0 10.2 ****** 1965 10.8 13.1 9.5 14.6 18.2 20.6 20.9 20.6 17.7 9.1 11.9 14.6 15.1 1966 16.6 11.3 ****** 12.4 11.2 11.7 13.8 10.2 7.9 8.1 8.5 9.4 ****** 1967 11.5 7.4 10.7 12.3 11.8 10.6 9.5 10.6 7.7 8.7 7.7 10.3 9.9 1968 11.2 ****** 9.9 9.0 11.5 9.2 9.7 9.0 11.2 9.2 8.1 8.9 ****** 1969 6.5 5.7 5.1 9.4 10.5 12.9 13.5 11.4 12.1 10.8 10.9 10.3 9.9 1970 9.1 11.5 9.4 12.2 11.9 10.1 11.0 9.6 8.2 8.8 9.0 9.3 10.0 1971 10.5 9.7 9.6 11.6 10.5 11.7 12.0 11.3 11.6 10.1 10.1 10.4 10.8 1972 7.2 9.6 12.9 16.9 14.7 14.9 13.1 12.8 10.7 9.8 12.8 10.8 12.2 1973 12.4 14.8 12.7 12.2 ****** 8.7 13.5 8.1 7.2 8.4 10.2 12.9 ****** 1974 7.3 6.5 8.5 13.1 13.3 15.1 11.2 8.3 5.9 12.1 8.0 ****** ****** 1975 ****** ****** ****** ****** 10.3 11.8 12.7 12.7 8.9 7.2 ****** 9.0 ****** 1976 10.6 ****** 8.1 11.6 10.2 9.3 9.5 9.7 11.4 8.9 11.6 9.6 ****** 1977 9.3 11.9 11.1 14.3 10.0 11.0 9.6 10.3 11.0 ****** 13.8 ****** ****** 1978 ****** 10.3 14.7 15.3 13.0 12.9 11.4 10.1 13.2 14.8 13.5 15.8 ****** 1979 11.4 17.6 15.2 14.8 11.7 11.2 10.2 12.5 13.2 10.3 17.7 17.4 13.6 1980 ****** ****** 13.2 13.6 17.9 14.3 13.7 15.4 12.3 9.3 9.2 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 9.2 8.8 8.5 10.3 7.5 8.3 9.4 9.0 9.3 7.4 6.1 11.0 8.7 1983 ****** 12.0 10.8 11.6 9.8 7.8 9.9 6.4 7.1 8.7 7.8 8.1 ****** 1984 7.6 5.1 4.4 7.9 9.0 8.6 9.6 6.6 7.6 9.4 7.3 6.5 7.5 1985 8.8 9.9 7.3 9.6 10.2 9.4 7.4 10.2 7.7 6.7 7.1 6.7 8.4 1986 10.5 8.7 7.0 9.5 9.1 10.8 10.2 10.5 10.0 7.1 6.7 10.4 9.2 1987 9.5 8.4 6.1 9.4 10.7 11.5 9.8 8.1 9.4 6.5 8.2 9.5 8.9 1988 7.6 9.7 12.8 12.3 9.7 10.9 9.4 8.3 7.8 7.8 10.2 10.4 9.7 1989 10.1 9.9 10.4 12.7 12.4 11.8 10.5 10.6 10.5 10.9 10.9 11.0 11.0 1990 10.5 13.0 12.1 12.3 12.4 12.0 11.9 12.1 11.4 10.7 12.2 11.3 11.8 1991 9.1 9.8 9.1 7.1 9.8 15.0 13.0 11.7 10.0 7.3 7.8 8.8 9.9 1992 10.6 9.0 8.5 7.6 8.1 14.0 11.9 10.0 9.3 9.5 8.5 8.2 9.6 1993 9.3 9.7 8.4 10.3 9.8 12.4 12.5 12.2 10.0 9.3 6.8 9.3 10.0 1994 11.0 9.8 10.3 13.0 12.1 10.2 12.0 13.4 16.0 14.2 13.8 7.7 12.0 1995 9.2 8.9 9.4 11.4 10.9 10.5 8.6 8.3 9.0 7.3 11.1 8.8 9.4 1996 5.3 6.8 4.6 7.5 9.9 8.0 9.4 9.5 8.5 8.8 7.1 9.8 7.9 1997 8.3 8.6 9.0 11.8 10.6 7.3 6.6 8.1 6.4 9.3 7.6 9.4 8.6 1998 6.8 9.4 9.1 10.6 10.6 10.9 9.6 8.9 5.9 8.6 7.4 6.9 8.7 1999 9.8 12.5 7.8 9.8 9.4 10.2 9.9 9.0 7.4 8.7 8.8 10.7 9.5 2000 7.4 9.9 9.5 11.6 9.1 10.4 11.3 9.3 6.8 6.0 6.5 8.0 8.8 2001 7.4 10.7 11.4 10.3 9.3 9.8 9.6 9.6 7.6 7.0 9.4 7.5 9.1 2002 7.9 11.1 11.1 5.8 8.0 9.6 10.6 8.3 9.5 8.6 8.7 6.7 8.8 2003 9.5 6.7 5.8 8.7 12.2 8.8 8.7 10.0 7.3 9.7 7.6 9.0 8.7 MEAN 9.4 9.9 9.5 11.2 11.2 11.2 11.0 10.3 9.6 9.2 9.6 9.8 10.2 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 5 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 3.21 4.63 5.87 6.74 10.32 13.65 12.81 14.00 13.32 9.50 7.01 4.85 8.83 1965 4.25 4.01 5.38 6.77 9.31 12.89 13.13 15.23 11.96 9.47 5.08 6.11 8.63 1966 6.06 5.33 6.21 7.88 9.64 13.64 14.50 16.68 13.43 10.17 7.16 4.86 9.63 1967 5.14 4.22 5.14 6.59 10.08 10.94 13.52 14.76 10.43 10.00 7.72 5.42 8.66 1968 4.24 4.89 4.52 6.50 9.95 11.73 14.21 15.02 12.58 9.62 7.94 5.60 8.90 1969 4.06 3.82 5.11 5.94 8.94 12.65 12.86 13.83 11.68 9.49 6.16 5.99 8.38 1970 5.11 5.53 6.06 7.20 10.65 12.14 13.47 14.84 12.45 9.87 8.09 5.55 9.25 1971 4.34 4.46 6.05 6.84 10.98 11.32 14.34 13.78 13.87 9.04 7.44 5.14 8.97 1972 3.47 3.03 4.30 7.75 9.93 13.75 15.52 13.89 14.03 12.18 7.15 4.44 9.12 1973 3.54 4.59 5.36 7.30 ****** 13.02 14.64 15.78 12.56 9.92 6.93 4.46 ****** 1974 4.09 4.30 4.79 6.10 10.20 13.12 13.89 11.38 7.14 9.36 5.84 4.69 7.91 1975 4.55 4.32 5.33 7.69 11.79 14.27 13.82 13.56 11.62 9.34 ****** 4.33 ****** 1976 3.95 ****** 3.41 7.27 9.60 12.91 14.45 16.18 13.01 8.85 6.30 5.19 ****** 1977 3.09 4.15 5.47 7.46 9.96 13.56 14.05 13.77 12.89 8.49 7.34 5.07 8.78 1978 4.53 4.84 5.50 6.84 8.83 10.91 14.11 13.62 12.96 9.50 4.85 5.41 8.49 1979 4.32 4.98 5.62 7.80 9.71 11.89 14.58 14.10 14.15 10.72 7.77 5.91 9.30 1980 ****** ****** 5.23 6.91 10.57 12.39 14.77 14.77 12.00 8.80 7.32 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 4.66 3.84 5.09 7.80 10.49 13.02 15.20 13.96 13.19 9.27 5.88 4.21 8.88 1983 ****** 4.56 4.87 7.09 11.49 13.56 15.58 14.83 12.65 9.03 7.52 5.51 ****** 1984 5.01 3.95 5.77 8.02 9.18 12.12 15.59 14.71 13.33 9.38 7.95 4.33 9.11 1985 4.61 4.38 4.65 7.57 10.78 13.81 14.00 14.45 13.49 9.62 7.99 5.65 9.25 1986 4.74 4.67 4.78 7.47 9.92 12.33 15.40 15.81 14.27 10.00 6.96 4.79 9.26 1987 5.22 4.86 5.45 5.81 10.30 13.01 14.74 15.37 12.06 7.82 6.35 5.14 8.85 1988 4.36 4.26 5.11 7.34 9.56 14.24 15.56 14.38 12.70 9.81 6.58 5.70 9.13 1989 3.77 3.82 5.49 6.81 8.41 12.56 14.89 14.95 11.66 8.89 7.20 5.31 8.65 1990 4.08 4.35 5.74 6.27 7.89 12.11 14.97 12.68 11.86 10.22 10.05 8.63 9.07 1991 4.80 4.56 5.29 6.96 7.57 10.33 12.47 11.28 11.06 11.15 7.16 5.78 8.20 1992 4.21 4.18 4.66 5.93 6.84 8.88 9.16 11.25 10.68 8.75 7.61 6.02 7.35 1993 4.86 4.11 5.03 6.38 7.68 9.07 10.88 10.65 10.38 9.27 5.59 4.67 7.38 1994 4.83 4.19 5.89 7.06 9.23 9.75 13.12 14.19 11.54 10.04 7.63 5.06 8.54 1995 5.32 5.38 5.74 7.62 10.76 13.10 14.65 16.52 13.92 9.88 7.37 4.89 9.60 1996 4.83 4.91 5.20 6.84 10.69 12.48 15.10 15.37 13.70 10.69 7.59 6.38 9.48 1997 5.32 4.22 5.02 6.94 10.69 14.95 16.09 16.42 12.40 11.63 7.44 5.61 9.73 1998 4.49 4.02 5.67 8.22 11.29 14.24 15.02 16.00 13.51 9.99 8.56 6.58 9.80 1999 5.26 5.57 6.17 7.54 10.16 12.43 14.43 18.01 13.51 10.93 6.71 5.91 9.72 2000 4.88 4.66 5.32 9.05 10.31 12.22 15.21 15.95 14.47 10.04 7.57 5.98 9.64 2001 4.94 5.23 6.30 8.29 11.25 12.98 14.49 15.87 14.41 10.80 7.88 6.40 9.90 2002 4.75 5.17 6.34 7.82 9.80 12.85 14.45 15.67 13.90 11.81 7.76 4.61 9.58 2003 4.92 4.93 5.22 6.33 9.32 12.35 14.08 14.99 13.04 11.22 7.43 5.46 9.11 MEAN 4.54 4.52 5.34 7.15 9.85 12.50 14.20 14.58 12.62 9.86 7.19 5.42 8.98 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 6 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 3.47 5.07 6.73 7.93 12.10 15.23 15.67 15.53 14.05 10.88 8.46 5.38 10.04 1965 4.94 5.90 6.39 8.33 11.35 14.07 16.75 16.89 13.78 10.59 8.23 6.34 10.30 1966 6.98 6.78 6.37 8.10 11.42 14.25 16.75 17.94 13.93 11.27 9.26 7.63 10.89 1967 5.76 5.02 5.94 7.92 11.14 12.19 13.60 15.94 13.17 12.48 9.10 6.86 9.93 1968 4.83 6.02 5.97 7.32 10.69 11.07 15.27 15.48 14.24 13.02 9.04 6.25 9.93 1969 4.61 4.22 5.60 6.79 10.25 13.82 14.10 15.75 13.78 11.32 7.32 7.40 9.58 1970 5.87 6.24 6.95 8.37 11.78 11.89 13.75 15.37 13.20 11.43 9.46 6.52 10.07 1971 5.21 5.48 7.09 7.61 11.24 12.16 15.06 13.49 13.99 10.83 8.84 6.05 9.76 1972 3.87 3.64 5.17 9.19 10.66 14.72 ****** 15.71 14.47 13.61 8.09 5.04 ****** 1973 4.03 5.54 5.95 7.75 ****** 13.28 14.55 16.33 13.02 11.82 7.64 5.69 ****** 1974 4.72 4.53 5.40 6.71 12.88 13.68 15.25 12.77 9.21 9.64 7.36 6.04 9.02 1975 5.05 4.89 6.20 8.28 12.42 14.69 14.08 14.72 13.72 10.58 ****** 5.52 ****** 1976 5.04 ****** 4.83 8.40 11.02 13.59 14.71 17.18 14.46 9.50 7.20 6.37 ****** 1977 ****** 5.90 6.63 7.74 10.82 14.43 15.10 15.67 14.42 9.62 8.35 5.79 ****** 1978 5.38 5.60 6.70 8.15 9.99 12.30 15.87 14.95 14.96 12.75 8.38 6.74 10.15 1979 4.81 5.77 6.64 8.49 10.42 12.53 14.98 14.68 14.39 12.00 8.85 6.88 10.04 1980 ****** ****** 5.81 8.29 11.44 14.39 15.51 16.34 14.77 11.54 10.51 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 5.52 4.29 5.75 9.12 11.26 14.08 16.76 16.57 14.83 10.54 7.14 5.75 10.13 1983 ****** 5.21 5.66 8.22 12.20 14.21 16.13 15.46 13.43 10.74 8.29 6.35 ****** 1984 6.09 4.01 5.68 9.27 10.29 13.32 15.28 15.88 13.33 10.55 8.70 4.78 9.77 1985 5.42 4.74 5.24 8.94 11.90 14.67 15.24 14.97 13.88 10.51 9.07 6.61 10.10 1986 6.08 5.77 5.40 8.32 10.33 12.78 16.06 15.79 15.17 10.62 7.66 6.17 10.01 1987 6.23 6.13 6.01 7.16 11.23 13.26 14.77 15.58 13.90 8.51 7.32 6.45 9.71 1988 5.56 6.12 7.67 10.22 10.88 15.39 16.40 15.03 13.86 10.90 8.36 7.87 10.69 1989 5.40 5.54 7.92 11.02 13.07 14.67 15.88 16.64 14.27 11.15 9.49 7.31 11.03 1990 5.84 7.42 8.80 9.60 11.79 15.13 18.23 17.50 15.39 14.30 15.21 13.03 12.69 1991 6.31 6.74 7.20 7.73 8.86 15.11 15.53 15.01 14.09 12.17 8.42 7.69 10.40 1992 6.13 5.18 5.70 7.05 7.69 11.57 11.91 12.91 12.76 10.12 8.25 7.18 8.87 1993 6.46 5.02 6.24 7.89 8.83 12.53 14.54 14.18 13.57 9.95 6.41 6.38 9.33 1994 6.93 5.74 8.48 11.18 12.64 12.75 14.14 16.44 14.22 10.85 8.38 5.42 10.60 1995 5.59 5.89 6.40 8.67 11.54 13.67 14.40 17.65 16.42 10.63 8.33 5.14 10.36 1996 5.28 5.24 5.36 7.27 11.54 12.67 15.72 15.77 14.78 11.02 8.18 7.14 10.00 1997 5.58 4.78 5.23 8.09 11.31 16.03 16.58 16.70 13.22 13.78 8.36 6.60 10.52 1998 5.09 4.77 5.12 9.64 13.57 14.77 15.67 16.30 14.42 11.14 9.55 7.32 10.61 1999 5.46 5.73 6.65 7.71 10.64 12.91 15.19 18.23 13.86 11.27 7.15 6.44 10.10 2000 5.17 5.62 5.73 9.74 10.93 12.43 15.44 15.67 14.64 10.38 8.05 6.32 10.01 2001 5.47 5.58 6.97 9.15 12.02 13.01 14.88 15.82 14.93 11.32 8.34 6.85 10.36 2002 5.49 5.40 6.60 8.08 10.12 12.61 14.81 15.49 14.13 12.85 8.77 4.98 9.94 2003 5.36 5.18 5.65 7.08 10.12 12.59 14.40 15.43 13.43 11.96 8.01 5.50 9.56 MEAN 5.42 5.43 6.26 8.38 11.12 13.55 15.24 15.74 14.01 11.24 8.52 6.53 10.11 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 7 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 4.06 5.42 6.41 7.30 11.13 14.85 15.22 14.88 13.62 10.33 7.67 5.20 9.67 1965 4.84 5.28 5.79 7.12 9.80 13.48 16.12 15.82 13.36 10.35 8.35 6.96 9.77 1966 6.00 6.75 6.78 8.37 10.95 13.63 17.18 17.70 13.53 10.58 8.93 6.82 10.60 1967 5.27 4.42 5.72 6.92 7.08 11.18 12.83 14.92 12.83 10.98 8.37 6.27 8.90 1968 4.58 5.17 5.33 7.14 10.42 13.28 14.82 14.75 13.49 11.99 8.24 5.77 9.58 1969 4.18 4.05 5.20 6.64 9.81 13.00 13.49 15.25 13.29 10.72 6.66 6.53 9.07 1970 5.07 5.64 6.26 7.77 11.02 11.46 12.70 14.84 12.48 10.43 9.10 6.39 9.43 1971 5.30 5.10 6.26 6.95 10.87 11.29 13.82 13.24 13.65 10.45 8.29 5.81 9.25 1972 3.83 3.49 4.67 8.44 9.86 13.17 15.80 15.57 14.30 12.44 7.63 4.60 9.48 1973 3.97 4.57 5.17 6.88 ****** 12.23 13.99 15.25 11.87 10.21 6.70 5.05 ****** 1974 3.92 3.88 4.96 5.77 10.73 12.63 13.88 12.06 8.96 15.70 7.08 5.76 8.78 1975 5.36 5.18 6.10 7.46 11.60 15.31 15.15 15.30 13.35 10.21 ****** 5.42 ****** 1976 4.94 ****** 4.37 7.85 10.29 12.88 14.40 16.91 14.48 9.46 7.00 6.23 ****** 1977 3.59 5.51 6.24 8.09 10.36 14.05 15.15 14.73 13.27 9.20 7.55 5.65 9.45 1978 5.50 5.27 6.31 7.87 9.62 12.10 15.18 14.09 14.36 14.61 7.27 6.59 9.90 1979 4.71 5.62 6.03 8.13 9.78 11.97 14.44 14.14 14.05 11.80 8.55 6.67 9.66 1980 ****** ****** 5.43 7.95 10.81 13.43 14.92 15.02 13.95 10.55 9.15 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 5.42 4.61 5.56 8.52 10.77 13.15 15.51 15.50 13.24 9.64 6.77 5.12 9.48 1983 ****** 4.93 5.02 8.24 11.08 13.95 16.13 14.66 12.42 9.88 8.08 5.85 ****** 1984 5.65 4.09 5.37 8.42 9.55 11.90 15.18 15.08 13.36 9.98 7.37 4.48 9.20 1985 4.75 4.63 4.84 8.08 10.78 13.84 13.95 13.91 12.90 9.81 8.27 5.72 9.29 1986 5.47 5.12 5.10 7.68 9.77 12.39 14.63 14.75 14.41 9.68 7.18 5.57 9.31 1987 5.61 5.69 5.75 6.63 10.59 12.64 14.01 14.79 12.59 7.90 6.84 6.11 9.10 1988 5.37 5.65 7.09 9.38 10.34 14.22 15.68 14.90 13.12 10.38 7.96 7.64 10.14 1989 5.03 5.10 7.33 9.94 12.21 14.26 15.45 16.30 13.84 10.59 9.23 6.77 10.50 1990 5.65 7.11 8.27 8.95 11.27 14.53 17.49 17.47 15.38 13.65 14.98 12.17 12.24 1991 5.93 6.12 6.77 7.62 8.58 13.87 14.32 14.02 12.96 11.25 7.81 7.43 9.72 1992 5.71 4.88 5.30 6.62 7.04 10.59 11.07 11.78 11.62 9.45 7.71 6.63 8.20 1993 5.59 4.64 5.52 7.21 8.46 11.49 13.77 13.76 12.58 10.04 5.88 5.84 8.73 1994 6.45 5.27 7.63 10.01 11.67 11.89 14.57 16.20 13.36 10.68 8.19 5.65 10.13 1995 5.82 5.57 6.47 8.47 11.09 13.51 14.57 17.60 15.66 10.85 8.21 5.50 10.28 1996 5.32 5.33 5.41 6.95 11.17 12.76 16.67 16.05 15.29 10.96 8.12 6.76 10.07 1997 5.97 4.72 5.58 7.58 11.43 15.44 16.73 17.06 13.47 13.29 8.24 6.72 10.52 1998 5.22 4.76 6.52 9.42 12.68 15.00 15.75 17.39 14.54 11.41 9.53 7.17 10.78 1999 5.82 5.76 6.69 8.11 10.54 12.58 15.14 19.33 14.43 11.92 7.27 6.46 10.34 2000 5.11 5.50 5.67 9.96 10.93 12.38 15.36 17.14 15.12 10.40 7.96 6.55 10.17 2001 5.46 5.82 7.03 9.21 12.01 13.19 15.23 17.54 15.23 11.22 8.33 6.81 10.59 2002 5.48 6.07 6.97 8.12 10.33 12.75 15.61 16.23 15.34 13.38 8.95 5.13 10.36 2003 5.65 5.26 5.71 7.16 9.73 12.72 14.63 16.33 13.81 12.76 8.28 6.15 9.85 MEAN 5.18 5.19 5.97 7.93 10.43 13.06 14.89 15.45 13.58 11.01 8.10 6.27 9.75 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 8 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. ABSOLUTE OF MINIMUM TEMPERATURE WITH DAY YEAR JAN. DAY FEB. DAY MAR. DAY APR. DAY MAY DAY JUNE DAY JULY DAY AUG. DAY SEP. DAY OCT. DAY NOV. DAY DEC. DAY ANNUAL 1964 -4.0 11 -5.0 4 2.0 2 4.0 5 3.0 3 ***** ** ***** ** ***** ** ***** ** 6.0 27 2.0 29 -1.4 30 ***** 1965 -0.4 1 -0.2 2 0.0 12 2.0 9 3.2 4 8.0 1 5.0 24 8.0 5 5.0 30 4.5 2 5.2 5 1.0 27 -0.4 1966 2.0 29 1.0 7 ***** ** 5.0 5 7.0 8 12.4 22 12.4 8 19.2 7 15.0 29 10.1 20 6.8 30 3.4 23 ***** 1967 1.0 23 0.0 7 0.0 29 1.0 2 10.4 6 10.4 5 17.0 3 17.2 23 14.0 23 9.0 25 3.2 29 0.0 24 0.0 1968 0.0 17 ***** ** 0.0 22 3.0 4 11.0 31 11.0 8 16.0 13 18.2 19 15.0 8 7.6 28 5.1 19 3.0 13 ***** 1969 -3.0 6 -1.0 5 0.0 23 2.0 3 8.0 7 12.2 4 12.0 15 14.0 4 12.0 13 6.0 30 2.2 19 2.0 30 -3.0 1970 0.0 28 1.0 7 4.0 12 6.2 2 9.2 8 11.0 11 17.0 2 16.0 31 12.0 13 10.0 25 8.0 1 1.6 18 0.0 1971 -3.0 20 0.0 2 5.0 2 3.0 2 11.0 1 14.0 4 17.0 27 18.6 15 15.0 30 8.0 26 7.0 19 1.0 21 -3.0 1972 -3.6 26 -9.0 10 -4.0 20 1.0 5 5.0 10 9.0 9 15.0 4 14.0 1 14.0 13 7.0 23 0.0 29 -5.0 28 -9.0 1973 -8.0 24 -2.0 6 0.0 1 3.0 3 ***** ** 14.0 6 10.0 14 15.0 28 11.0 27 6.0 27 2.0 21 0.0 13 ***** 1974 -1.0 26 -1.4 5 0.0 1 0.0 11 2.0 2 10.0 26 12.0 7 15.0 4 7.0 23 2.0 27 2.0 15 ***** ** ***** 1975 ***** ** ***** ** ***** ** ***** ** 12.0 19 13.5 4 16.0 4 14.0 16 13.0 12 8.0 31 ***** ** 0.0 5 ***** 1976 -1.0 29 ***** ** -4.0 3 1.5 9 8.0 8 13.0 18 13.5 7 19.0 30 15.5 29 8.5 31 3.5 30 1.0 25 ***** 1977 -3.5 15 -1.0 1 1.0 12 4.5 4 8.0 2 13.0 9 14.5 1 16.5 30 14.0 30 3.0 30 3.0 27 1.0 12 -3.5 1978 0.5 15 1.0 23 1.5 8 2.0 12 6.0 14 8.0 2 12.5 1 14.5 23 14.0 28 11.0 14 2.0 3 -1.0 24 -1.0 1979 -1.0 9 0.0 28 -1.0 2 5.5 29 6.5 1 14.0 14 18.0 9 18.0 2 13.0 29 8.5 28 5.5 7 1.0 23 -1.0 1980 ***** ** ***** ** 0.0 8 3.0 18 9.0 16 10.0 2 18.5 1 16.5 30 11.0 23 7.0 22 5.5 26 ***** ** ***** 1981 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1982 -1.0 24 -2.5 19 0.5 27 5.0 3 10.5 7 15.5 4 18.0 7 17.5 18 15.5 19 8.5 10 3.5 16 -2.0 8 -2.5 1983 ***** ** 0.0 23 -1.0 8 6.5 1 12.0 1 14.5 1 17.5 1 17.0 26 13.5 29 9.5 8 4.5 27 1.0 15 ***** 1984 0.0 29 -4.0 1 1.0 14 5.5 5 7.0 2 14.5 17 18.5 4 18.0 13 16.5 22 6.5 21 6.5 17 -0.5 6 -4.0 1985 -2.0 4 -2.0 23 -6.0 11 6.5 1 8.5 5 17.0 2 19.0 29 17.5 29 14.5 21 9.5 24 7.5 21 2.0 5 -6.0 1986 -3.0 21 0.0 3 0.5 3 6.0 1 11.5 9 14.0 21 18.5 3 16.5 31 13.5 30 11.5 8 5.0 16 -1.5 17 -3.0 1987 2.5 22 0.0 7 3.5 1 3.0 7 8.5 1 16.0 2 16.0 4 16.0 29 12.0 8 6.2 27 3.5 30 0.0 29 0.0 1988 -1.0 4 -2.0 7 0.4 11 5.5 4 6.5 3 15.5 1 17.5 2 16.0 31 15.0 22 10.5 16 2.5 15 -1.5 29 -2.0 1989 -3.5 5 -3.5 5 0.0 30 6.5 2 8.5 1 15.5 2 18.5 3 17.5 2 10.5 22 8.5 24 3.5 22 2.0 8 -3.5 1990 -2.0 11 1.5 4 1.5 18 4.5 3 8.0 23 11.5 1 15.5 1 15.0 18 14.0 20 11.5 6 12.5 28 6.5 30 -2.0 1991 1.5 22 0.0 15 2.5 1 7.5 1 9.5 1 10.0 4 13.5 31 14.5 6 14.5 17 14.5 30 8.5 14 2.0 16 0.0 1992 -3.5 28 -2.0 2 -1.5 13 5.5 18 6.5 3 8.5 7 11.5 11 14.5 1 9.5 29 10.5 1 8.5 25 5.5 30 -3.5 1993 -3.0 16 -7.5 18 2.5 1 2.5 14 8.5 14 11.5 1 13.0 8 12.0 27 13.0 30 9.5 9 1.0 14 -1.0 7 -7.5 1994 1.0 22 -3.0 4 5.5 2 7.5 4 9.5 6 11.5 29 12.5 9 12.0 4 7.0 10 6.0 9 0.5 11 -3.0 8 -3.0 1995 0.0 23 -1.5 26 0.5 7 4.5 9 10.0 9 14.0 1 18.5 12 19.6 31 13.0 23 9.6 26 3.6 26 -0.6 21 -1.5 1996 -2.0 16 -2.6 4 -1.6 2 3.0 7 8.2 3 13.6 8 16.6 16 17.0 26 15.0 26 8.6 21 3.8 20 3.6 5 -2.6 1997 -2.6 30 -3.4 3 -2.0 10 2.0 12 9.0 3 16.0 4 17.6 8 19.0 31 12.4 17 11.0 31 4.6 15 -1.2 29 -3.4 1998 -1.6 14 -3.6 2 0.1 3 4.4 2 7.0 4 15.4 18 15.4 26 19.0 23 15.4 29 8.8 14 7.4 25 3.2 24 -3.6 1999 -1.0 23 0.0 1 0.6 19 5.6 10 7.0 22 13.6 18 15.2 15 19.4 31 12.6 29 8.6 28 0.2 30 1.0 2 -1.0 2000 -0.6 31 -2.4 9 -1.0 4 6.0 2 10.6 11 9.4 14 17.6 5 18.6 13 17.0 12 8.2 29 4.4 12 1.4 29 -2.4 2001 -5.2 28 -0.8 12 0.2 12 4.8 11 10.0 27 14.0 1 16.4 19 16.0 13 15.2 21 8.0 27 0.2 19 0.0 22 -5.2 2002 -2.0 13 -1.6 19 0.0 7 6.0 14 8.4 2 13.8 8 16.4 2 18.2 14 15.6 10 11.0 24 1.0 30 -1.4 28 -2.0 2003 -1.4 18 -2.4 18 -1.4 3 1.8 30 3.6 2 10.4 7 15.2 31 14.2 1 15.0 23 13.0 6 1.6 24 0.0 11 -2.4 LOW. -8.0 24 -9.0 10 -6.0 11 0.0 11 2.0 2 8.0 1 5.0 24 8.0 5 5.0 30 2.0 27 0.0 29 -5.0 28 -9.0 YEAR 1973 1972 1985 1974 1974 1965 1965 1965 1965 1974 1972 1972 1972 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 9 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. ABSOLUTE OF MAXIMUM TEMPERATURE WITH DAY YEAR JAN. DAY FEB. DAY MAR. DAY APR. DAY MAY DAY JUNE DAY JULY DAY AUG. DAY SEP. DAY OCT. DAY NOV. DAY DEC. DAY ANNUAL 1964 19.0 17 17.0 2 22.0 26 27.0 26 29.0 9 33.0 3 33.0 18 33.0 4 30.0 3 27.0 1 32.0 21 21.0 1 33.0 1965 16.0 3 23.2 6 25.0 31 33.2 28 31.0 16 34.0 8 36.0 16 34.0 4 33.0 2 27.0 7 32.0 16 31.0 15 36.0 1966 28.5 6 21.0 11 ***** ** 29.0 18 29.2 27 35.0 6 36.2 27 35.0 2 31.0 10 25.0 6 24.2 1 25.0 17 ***** 1967 27.0 15 17.0 23 23.0 4 28.0 20 32.0 27 34.0 3 32.0 10 34.0 3 31.2 5 30.0 8 25.0 22 24.0 7 34.0 1968 28.0 13 24.0 20 30.0 13 25.0 14 32.0 20 30.0 15 35.0 20 34.0 16 32.0 2 30.0 4 22.0 28 29.0 11 35.0 1969 15.0 1 12.0 2 14.0 31 28.0 17 35.0 23 34.0 10 36.0 13 32.0 20 34.0 6 27.0 5 24.0 8 25.0 18 36.0 1970 19.8 30 27.2 13 32.0 17 28.0 19 32.0 13 32.0 30 36.0 9 34.0 13 31.0 8 31.0 4 29.0 7 24.0 2 36.0 1971 20.2 1 22.0 10 28.0 11 30.0 15 31.0 4 34.0 14 36.0 29 37.0 26 33.0 4 29.0 24 26.0 23 25.0 8 37.0 1972 15.0 4 12.0 27 24.0 25 34.0 28 30.4 1 34.0 22 34.0 5 34.0 16 32.4 3 29.2 6 29.6 10 15.4 4 34.0 1973 13.0 30 30.0 19 27.0 1 30.0 17 ***** ** 34.0 12 33.0 27 34.0 3 30.0 5 27.0 19 30.6 1 24.0 17 ***** 1974 13.0 13 15.6 11 30.0 17 32.0 16 30.0 13 33.0 22 32.0 2 28.0 3 25.0 2 33.5 26 27.0 22 18.5 21 33.5 1975 22.0 9 21.0 10 26.0 26 29.0 12 30.0 30 33.0 28 35.0 23 34.0 7 32.0 1 27.0 10 ***** ** 18.0 10 ***** 1976 21.0 6 ***** ** 14.0 4 32.0 13 29.0 20 36.5 10 33.0 29 35.0 3 37.0 18 32.0 4 30.0 26 22.0 5 ***** 1977 10.0 3 22.0 14 23.0 22 31.5 14 31.0 15 32.0 6 33.0 15 34.0 12 31.5 3 ***** ** 26.0 11 ***** ** ***** 1978 ***** ** 22.0 16 24.0 8 32.0 11 26.0 14 32.0 17 34.0 12 32.0 4 37.0 10 34.0 31 31.0 3 28.0 1 ***** 1979 30.0 4 25.5 17 25.0 16 31.0 5 29.0 20 33.0 19 33.0 24 35.0 16 34.0 18 31.0 24 32.5 3 25.0 8 35.0 1980 ***** ** ***** ** 24.0 31 29.0 26 36.0 24 37.0 4 35.0 26 35.0 1 31.0 2 26.5 4 25.0 4 ***** ** ***** 1981 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1982 23.5 8 22.0 3 24.5 31 31.5 23 26.5 31 30.5 9 36.5 19 32.5 19 33.0 1 27.5 15 24.5 6 19.5 31 36.5 1983 ***** ** 24.5 19 23.5 12 32.0 18 31.5 26 31.0 18 37.5 26 35.0 15 30.0 8 25.5 7 28.0 17 23.0 2 ***** 1984 17.0 6 9.5 19 15.5 29 25.5 27 33.5 26 33.5 10 36.5 22 32.5 24 31.5 12 30.5 14 24.5 25 14.5 13 36.5 1985 23.5 21 24.5 13 19.5 21 26.5 9 30.5 21 31.5 19 32.5 13 34.5 7 32.5 6 26.5 18 22.5 3 17.5 8 34.5 1986 22.5 9 22.5 27 15.5 27 36.5 15 31.0 3 32.5 3 34.5 8 33.5 17 35.0 3 32.5 22 27.0 9 26.5 27 36.5 1987 25.5 31 26.5 25 25.5 6 26.5 12 37.5 23 34.5 19 33.5 16 34.5 9 29.5 11 27.5 1 22.5 21 21.5 22 37.5 1988 15.5 8 25.5 29 34.5 4 31.5 16 28.5 20 35.5 13 33.5 3 32.5 8 30.5 8 25.5 5 26.5 8 20.5 19 35.5 1989 19.5 1 23.5 28 24.5 26 25.5 3 34.5 10 32.5 11 34.5 22 31.5 2 31.5 1 27.5 5 30.5 27 23.0 1 34.5 1990 16.0 1 25.5 28 23.0 12 29.0 28 29.5 27 32.5 11 34.5 20 31.5 3 30.5 5 28.5 25 29.5 7 27.5 7 34.5 1991 17.5 4 18.5 18 18.5 1 18.5 30 28.0 31 34.5 28 35.5 7 30.5 3 29.5 6 26.5 25 21.5 13 20.6 5 35.5 1992 16.5 3 16.0 6 16.0 31 22.5 21 24.5 29 31.5 27 31.5 24 29.5 16 28.5 10 27.5 28 23.5 22 19.5 12 31.5 1993 29.5 28 15.5 1 19.5 31 22.5 16 26.5 19 30.5 16 33.4 22 30.5 5 31.5 29 31.5 1 19.0 8 22.5 22 33.4 1994 25.5 30 22.5 5 29.5 29 30.5 25 30.5 29 29.5 12 38.5 9 32.0 15 28.5 3 33.0 19 23.0 2 21.5 14 38.5 1995 22.0 3 19.5 10 23.5 31 31.0 20 30.0 7 35.5 21 33.5 13 33.0 3 32.0 12 30.0 3 32.5 8 22.8 22 35.5 1996 14.0 4 29.5 9 16.5 7 27.0 30 31.0 17 33.5 30 33.5 20 34.0 7 39.5 30 35.5 25 20.0 6 25.0 26 39.5 1997 25.5 7 18.5 16 28.0 24 34.0 24 31.5 26 31.5 20 32.5 30 33.0 5 32.5 2 33.0 13 22.5 5 22.2 6 34.0 1998 13.5 15 26.5 7 25.5 25 30.0 11 32.0 22 35.5 22 33.0 25 34.0 4 32.6 1 32.0 1 26.2 15 26.0 10 35.5 1999 19.4 11 26.6 20 22.0 20 27.6 19 27.6 18 31.0 14 33.0 31 36.6 24 31.0 2 32.2 16 28.4 19 24.4 28 36.6 2000 23.0 26 22.0 23 22.6 19 32.0 7 29.4 26 31.4 6 35.0 29 36.0 1 32.6 8 24.0 7 19.4 26 22.6 21 36.0 2001 18.0 10 25.0 28 30.4 29 27.8 24 29.2 15 32.8 22 34.0 27 35.0 3 31.0 9 27.0 6 26.0 15 29.4 29 35.0 2002 23.6 2 28.2 26 31.2 27 23.8 6 30.0 30 31.4 24 35.4 14 34.4 4 31.0 12 31.4 2 27.2 4 18.4 31 35.4 2003 25.0 7 26.4 3 14.0 22 32.0 9 30.4 30 29.4 18 33.0 7 34.0 11 33.2 4 31.6 24 23.4 21 29.0 18 34.0 HIG. 30.0 4 30.0 19 34.5 4 36.5 15 37.5 23 37.0 4 38.5 9 37.0 26 39.5 30 35.5 25 32.5 3 31.0 15 39.5 YEAR 1979 1973 1988 1986 1987 1980 1994 1971 1996 1996 1979 1965 1996 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 10 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. 24 HOUR MAXIMUM PRECIPITATION. YEAR JAN. DAY FEB. DAY MAR. DAY APR. DAY MAY DAY JUNE DAY JULY DAY AUG. DAY SEP. DAY OCT. DAY NOV. DAY DEC. DAY ANNUAL 1964 17.0 1 27.0 26 29.0 7 37.0 11 12.0 1 7.0 17 0.0 ** 41.0 6 37.0 15 35.0 28 33.0 27 27.0 25 41.0 1965 20.5 29 22.0 13 31.0 2 12.0 9 20.0 4 21.2 25 25.0 23 17.0 8 47.0 19 77.4 14 18.5 8 27.0 29 77.4 1966 26.0 11 16.0 6 78.0 1 50.0 24 19.5 5 5.7 14 5.4 17 45.4 6 83.0 21 52.0 1 48.0 7 28.0 29 83.0 1967 22.0 22 32.0 27 103.0 29 12.0 8 24.0 18 68.0 5 9.0 21 15.0 13 47.0 11 82.0 13 61.0 16 42.0 23 103.0 1968 21.0 25 38.0 4 76.0 22 41.0 25 13.0 31 52.0 7 47.0 12 6.0 2 30.0 16 88.0 27 43.0 17 29.0 7 88.0 1969 29.0 6 49.0 21 21.0 22 30.0 3 13.0 20 39.0 15 24.0 5 18.0 9 148.0 11 58.0 26 22.8 9 17.0 15 148.0 1970 47.0 26 8.0 13 22.0 11 23.0 21 22.0 7 28.0 10 40.0 24 24.0 31 48.0 12 33.0 17 32.0 13 67.0 9 67.0 1971 60.0 15 26.0 8 21.0 15 29.0 2 5.0 12 16.0 19 0.0 ** 6.0 1 10.5 30 33.0 3 27.0 10 25.0 20 60.0 1972 44.0 7 30.0 8 31.0 19 18.0 4 41.0 10 14.0 7 16.0 22 44.0 1 16.0 7 31.0 8 53.0 5 51.0 23 53.0 1973 25.0 23 17.0 23 38.0 8 15.0 1 ***** ** 13.0 5 4.0 22 46.0 29 76.5 26 64.0 27 55.0 6 21.0 29 ***** 1974 17.0 16 43.0 20 35.0 12 19.5 1 11.0 5 30.0 7 79.0 6 42.0 13 27.0 18 0.0 ** 94.0 29 23.0 23 94.0 1975 30.0 14 18.0 3 21.0 15 16.0 24 12.0 6 19.0 14 0.0 ** 36.0 18 64.0 15 77.0 14 ***** ** 29.0 31 ***** 1976 20.0 21 ***** ** 36.0 2 7.0 25 41.0 7 17.0 12 33.0 4 0.0 ** 35.0 10 89.0 30 48.0 29 33.0 18 ***** 1977 16.0 3 23.0 7 8.0 9 12.0 20 58.0 21 137.0 27 3.0 11 76.0 19 58.0 30 51.0 11 52.0 12 34.0 12 137.0 1978 21.0 21 18.5 22 21.0 7 14.5 11 25.5 7 55.0 2 2.0 6 31.0 19 23.0 26 46.0 15 89.5 14 29.5 23 89.5 1979 40.0 23 42.0 28 59.0 27 22.5 26 25.0 7 7.5 5 23.5 8 16.5 1 27.5 20 36.5 8 48.0 4 181.0 16 181.0 1980 ***** ** ***** ** 39.0 16 14.0 14 50.0 16 0.0 ** 0.0 ** 17.5 27 38.0 21 101.0 20 43.0 10 ***** ** ***** 1981 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1982 26.5 13 37.5 17 22.5 20 8.0 8 25.5 9 17.0 24 0.0 ** 43.0 14 35.0 19 160.0 7 38.0 11 54.0 7 160.0 1983 ***** ** 6.0 21 19.5 16 25.0 23 26.5 31 18.0 26 21.0 30 17.0 25 46.0 14 51.0 16 33.0 26 90.0 14 ***** 1984 39.5 30 37.0 5 31.5 26 13.5 24 35.0 6 16.5 15 4.0 28 55.0 11 19.0 7 85.5 19 53.0 30 30.0 6 85.5 1985 20.5 16 18.0 18 46.0 8 5.0 28 6.0 24 6.0 15 26.5 28 12.0 25 52.5 16 204.0 11 46.0 19 41.5 14 204.0 1986 16.0 20 39.0 1 20.0 2 17.0 1 9.0 16 28.0 21 21.0 30 72.0 24 65.0 30 42.0 7 66.0 5 56.0 9 72.0 1987 14.0 20 12.0 21 23.5 14 19.5 5 9.5 30 3.0 5 27.0 10 44.0 28 61.0 23 110.0 9 26.0 26 25.0 26 110.0 1988 60.5 19 42.0 1 21.5 6 24.0 29 12.0 2 48.0 24 29.5 24 100.0 4 49.5 13 30.5 22 29.5 11 26.5 28 100.0 1989 38.5 11 64.5 13 49.5 29 16.5 8 14.0 18 0.0 ** 16.0 10 23.0 18 98.0 19 48.0 21 57.5 7 55.5 3 98.0 1990 47.0 6 39.5 19 45.0 15 61.5 1 40.5 13 4.0 22 34.5 31 16.0 25 14.0 16 68.0 14 31.0 13 53.0 11 68.0 1991 49.0 5 38.0 21 37.5 15 18.0 1 28.0 15 2.0 17 28.0 16 7.0 13 55.0 25 29.0 22 51.0 7 56.0 13 56.0 1992 34.5 8 36.5 21 22.0 10 50.0 18 37.0 4 26.0 5 45.0 10 22.5 27 59.0 26 90.0 6 57.0 26 87.0 3 90.0 1993 31.0 8 44.0 3 21.0 10 27.5 23 34.5 3 60.5 20 20.0 5 29.5 23 46.0 8 50.0 4 73.0 11 28.5 8 73.0 1994 61.0 5 22.5 14 11.0 12 16.0 2 22.0 17 109.0 27 0.0 ** 13.5 6 11.5 3 111.0 20 84.0 5 18.0 20 111.0 1995 12.5 20 29.0 5 12.0 17 36.0 25 8.0 6 16.5 22 24.5 6 19.0 15 121.0 26 61.0 12 12.0 11 27.0 8 121.0 1996 31.5 13 63.0 2 39.5 15 90.4 26 5.0 21 22.0 12 13.0 30 5.5 30 46.0 20 37.0 7 98.5 12 17.0 12 98.5 1997 29.5 17 16.0 7 41.0 8 20.5 11 6.0 4 46.0 23 33.0 7 4.0 7 47.5 6 65.0 31 49.0 24 61.0 11 65.0 1998 34.0 9 52.5 27 15.5 18 7.0 28 10.0 1 18.0 25 18.5 8 17.5 14 33.5 11 96.0 7 34.2 4 56.0 2 96.0 1999 36.0 1 12.1 4 50.5 17 21.5 6 27.0 20 4.6 17 29.0 12 42.7 31 63.7 16 55.5 25 29.5 10 49.1 16 63.7 2000 24.0 28 47.8 7 34.0 24 6.5 21 24.0 4 22.0 12 0.0 ** 69.0 30 76.0 11 70.0 1 117.5 6 52.0 9 117.5 2001 57.7 24 11.0 22 38.0 25 9.2 9 27.9 25 4.5 29 27.5 18 17.2 11 49.5 6 88.8 1 75.2 18 26.5 2 88.8 2002 16.2 12 21.0 16 41.8 18 25.0 13 16.0 10 1.6 20 7.4 22 21.2 27 43.4 20 110.4 22 69.5 14 48.2 2 110.4 2003 15.2 16 30.4 28 33.0 13 42.7 17 56.4 24 62.2 6 16.7 24 12.1 25 63.7 20 48.0 20 83.4 14 84.0 11 84.0 HIG. 61.0 5 64.5 13 103.0 29 90.4 26 58.0 21 137.0 27 79.0 6 100.0 4 148.0 11 204.0 11 117.5 6 181.0 16 204.0 YEAR 1994 1989 1967 1996 1977 1977 1974 1988 1969 1985 2000 1979 1985 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 11 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MONTHLY TOTAL PRECIPITATION WITH SEASONAL PERCENT. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL SEASONAL-PERCENT ----------------------- 1964 58.4 93.0 111.0 224.0 12.0 10.0 0.0 80.0 101.0 80.5 86.0 58.0 913.9 28.7 26.9 19.8 24.6 1965 123.6 29.0 165.3 64.5 41.0 32.8 75.4 27.5 175.5 460.2 60.5 85.0 1340.3 23.7 10.3 20.8 45.2 1966 77.0 53.8 160.0 134.1 80.7 16.7 9.4 147.4 268.0 315.0 134.2 77.0 1473.3 19.7 15.7 28.8 35.7 1967 65.1 157.8 241.0 51.0 46.0 74.0 12.0 17.0 193.0 216.0 145.0 117.0 1334.9 34.8 12.8 16.6 35.8 1968 60.1 144.0 164.0 174.8 47.0 69.5 81.0 28.5 87.0 204.0 215.5 133.0 1408.4 26.1 20.7 14.0 39.2 1969 194.2 238.5 155.4 115.8 55.0 90.0 104.0 25.0 423.0 247.0 131.8 80.3 1860.0 31.6 14.0 29.7 24.7 1970 166.8 26.0 139.0 37.0 37.0 32.0 64.0 105.5 134.2 127.0 150.0 258.0 1276.5 26.0 8.3 23.8 41.9 1971 160.0 101.0 72.0 159.0 11.0 25.0 0.0 10.0 10.5 118.0 51.0 147.0 864.5 38.5 22.6 2.4 36.6 1972 251.0 120.0 168.5 21.0 70.0 29.0 20.0 45.0 53.0 132.5 271.0 279.5 1460.5 36.9 8.2 8.1 46.8 1973 82.0 47.0 176.0 26.0 ****** 40.0 7.0 108.5 308.0 166.0 146.5 129.5 ****** 24.7 5.3 34.2 35.7 1974 124.5 149.0 184.0 93.5 22.0 72.0 300.0 172.0 70.0 0.0 340.0 93.0 1620.0 28.2 11.6 33.5 26.7 1975 83.0 90.0 61.0 24.0 31.0 27.0 0.0 79.0 276.0 229.0 ****** 116.0 ****** 23.0 8.1 34.9 34.0 1976 64.0 ****** 140.0 14.5 79.5 39.0 112.0 0.0 179.5 409.5 148.0 144.0 ****** 15.3 10.0 21.9 52.7 1977 116.0 27.0 30.0 20.0 112.5 209.0 3.0 127.0 114.5 279.5 165.0 169.0 1372.5 12.6 24.9 17.8 44.7 1978 74.0 90.5 76.0 35.5 80.5 121.0 3.5 49.5 35.5 179.0 361.0 122.5 1228.5 19.6 19.3 7.2 53.9 1979 164.5 142.0 93.5 70.5 60.0 14.5 60.5 20.0 86.5 195.0 119.0 270.0 1296.0 30.9 11.2 12.9 45.1 1980 ****** ****** 121.0 33.5 53.0 0.0 0.0 58.0 109.5 273.5 84.0 ****** ****** 16.5 11.8 22.9 48.8 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1982 111.5 215.0 121.5 17.5 84.5 46.0 0.0 119.5 64.0 499.0 269.0 109.5 1657.0 27.0 8.9 11.1 53.0 1983 ****** 6.0 97.0 61.5 68.0 73.0 39.0 87.0 142.5 185.5 153.0 195.5 ****** 9.3 18.3 24.2 48.2 1984 115.5 190.0 124.5 43.0 119.0 21.5 4.0 172.5 33.5 178.0 183.0 205.0 1389.5 30.9 13.2 15.1 40.7 1985 111.0 87.0 194.5 16.0 13.5 10.5 82.5 29.5 157.5 397.5 215.5 229.5 1544.5 25.4 2.6 17.4 54.5 1986 37.0 128.5 138.5 23.3 40.5 67.5 46.5 80.0 151.5 196.5 246.5 186.5 1342.8 22.6 9.8 20.7 46.9 1987 41.0 61.5 88.5 85.0 12.5 3.0 61.5 65.0 199.5 425.0 99.5 98.5 1240.5 15.4 8.1 26.3 50.2 1988 199.5 97.5 50.0 64.5 37.5 97.5 56.5 296.0 248.0 127.5 137.0 70.0 1481.5 23.4 13.5 40.5 22.6 1989 237.0 220.0 210.5 24.5 19.0 0.0 20.0 59.0 348.0 221.5 125.5 368.5 1853.5 36.0 2.3 23.0 38.6 1990 259.5 143.0 138.0 191.5 66.5 8.0 66.0 48.0 34.5 312.0 78.0 364.5 1709.5 31.6 15.6 8.7 44.1 1991 158.5 196.5 186.5 40.0 61.0 2.0 90.0 7.0 164.5 118.5 252.0 167.0 1443.5 37.5 7.1 18.1 37.2 1992 163.0 152.5 132.5 238.0 103.0 79.5 126.5 72.0 229.5 275.0 165.0 374.5 2111.0 21.2 19.9 20.3 38.6 1993 202.0 264.5 115.0 54.5 107.0 215.5 84.5 55.5 225.0 269.0 530.0 113.5 2236.0 26.0 16.9 16.3 40.8 1994 125.0 176.0 72.5 59.0 86.5 341.5 0.0 30.0 23.0 299.4 273.2 100.5 1586.6 23.5 30.7 3.3 42.4 1995 51.0 79.0 46.5 61.0 27.0 39.0 27.5 55.5 284.0 261.5 14.0 95.5 1041.5 16.9 12.2 35.2 35.6 1996 111.5 141.5 160.8 208.9 17.5 90.0 24.5 14.0 141.0 154.5 179.0 32.0 1275.2 32.4 24.8 14.1 28.7 1997 111.0 106.6 174.0 20.5 10.5 138.1 164.0 9.5 327.5 157.5 133.0 137.0 1489.2 26.3 11.4 33.6 28.7 1998 157.5 178.7 33.0 24.3 39.5 24.5 51.5 45.1 180.8 242.9 153.8 152.7 1284.3 28.7 6.9 21.6 42.8 1999 110.7 15.1 70.8 109.9 108.6 6.1 68.3 81.6 246.1 267.9 147.3 87.1 1319.5 14.9 17.0 30.0 38.1 2000 161.5 130.4 160.3 11.5 62.1 37.7 0.0 106.6 190.3 247.1 324.0 167.7 1599.2 28.3 7.0 18.6 46.2 2001 208.5 31.9 89.3 28.7 75.5 7.4 45.6 44.7 168.5 322.7 258.9 91.5 1373.2 24.0 8.1 18.8 49.0 2002 68.2 86.0 86.9 145.7 87.9 2.8 22.0 56.8 63.4 191.4 268.8 297.4 1377.3 17.5 17.2 10.3 55.0 2003 56.6 142.0 167.2 141.3 83.9 87.2 26.8 45.7 250.4 78.3 319.2 278.4 1677.0 21.8 18.6 19.3 40.3 MEAN 126.0 117.8 126.1 76.1 57.1 59.0 50.2 68.7 166.6 232.3 187.7 163.2 1430.8 25.8 13.4 20.0 40.8 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 12 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. NO. OF DAYS WITH PRECIPITATION YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 6 9 10 13 1 2 0 8 8 7 5 10 79 1965 14 3 10 10 5 5 8 2 10 20 8 7 102 1966 7 8 12 9 6 5 2 7 15 16 7 9 103 1967 7 14 13 6 4 2 2 2 16 9 13 8 96 1968 7 7 9 12 9 3 5 7 7 11 13 11 101 1969 20 17 17 11 7 4 11 3 12 19 9 10 140 1970 11 4 12 4 4 3 4 10 8 10 10 13 93 1971 8 9 9 13 4 3 0 2 1 9 4 15 77 1972 16 11 18 2 5 4 3 2 7 11 11 15 105 1973 8 6 12 3 *** 6 3 8 13 7 11 12 *** 1974 18 13 17 10 5 4 9 12 6 0 12 6 112 1975 6 9 7 2 4 3 0 5 13 14 *** 9 *** 1976 6 *** 13 3 6 4 6 0 10 12 7 10 *** 1977 13 2 5 2 6 5 1 5 7 12 7 11 76 1978 8 10 6 6 9 7 2 3 3 10 16 9 89 1979 12 12 7 8 3 2 5 2 9 10 8 7 85 1980 *** *** 12 5 2 0 0 8 8 11 5 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 12 13 9 5 12 7 0 10 4 18 12 4 106 1983 *** 1 10 8 8 10 3 11 13 8 11 12 *** 1984 9 18 12 9 10 3 1 10 5 10 16 17 120 1985 10 9 15 6 5 4 10 5 8 14 13 13 112 1986 6 11 16 3 11 7 5 2 8 15 19 11 114 1987 9 9 14 14 2 1 5 3 13 15 7 12 104 1988 14 9 8 7 7 5 5 11 18 13 19 8 124 1989 15 8 11 3 3 0 3 4 8 12 6 16 89 1990 12 9 6 8 5 3 3 4 5 13 4 14 86 1991 8 7 7 3 4 1 5 1 8 8 12 7 71 1992 9 11 10 11 11 9 6 9 11 14 9 14 124 1993 16 13 11 9 15 12 9 6 13 12 23 11 150 1994 12 18 15 9 7 12 0 6 5 13 14 11 122 1995 8 8 7 7 7 7 2 7 9 12 2 13 89 1996 12 15 17 13 8 14 4 5 12 11 10 5 126 1997 9 18 11 1 3 15 9 4 16 6 9 9 110 1998 13 8 6 8 10 4 5 11 14 9 15 13 116 1999 8 3 11 10 11 2 6 6 12 13 13 6 101 2000 17 10 14 3 10 7 0 9 17 18 16 15 136 2001 14 8 11 9 13 3 6 8 11 16 13 14 126 2002 10 7 12 19 14 2 6 11 5 16 14 19 135 2003 11 17 20 10 8 5 5 9 16 9 14 14 138 MEAN 11 10 11 8 7 5 4 6 10 12 11 11 106 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 13 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. NO. OF DAYS PRECIPITATION EQUAL OR MORE THAN 1 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 6 9 10 13 1 2 0 8 8 7 5 9 78 1965 14 3 10 10 5 4 8 2 10 20 8 7 101 1966 7 8 12 9 6 5 2 7 15 16 7 9 103 1967 7 14 13 6 4 2 2 2 16 9 13 8 96 1968 7 7 9 12 9 3 5 7 7 11 13 11 101 1969 20 17 17 11 7 4 11 3 12 19 9 10 140 1970 11 4 12 4 4 3 4 10 8 10 10 13 93 1971 8 9 9 13 4 3 0 2 1 9 4 15 77 1972 16 11 18 2 5 4 3 2 7 11 11 15 105 1973 8 6 12 3 *** 6 3 8 13 7 11 12 *** 1974 18 13 17 10 5 4 9 12 6 0 12 6 112 1975 6 9 7 2 4 3 0 5 13 14 *** 9 *** 1976 6 *** 13 3 6 4 6 0 10 12 7 10 *** 1977 13 2 5 2 6 5 1 5 7 12 7 10 75 1978 8 10 6 6 9 7 2 3 3 10 16 9 89 1979 12 12 7 8 3 2 5 2 9 10 8 7 85 1980 *** *** 12 5 2 0 0 8 8 11 5 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 12 13 9 5 12 7 0 10 4 18 12 4 106 1983 *** 1 10 8 8 10 3 11 13 8 11 12 *** 1984 9 18 12 9 10 3 1 10 5 10 16 17 120 1985 10 9 15 6 5 4 10 5 8 14 13 13 112 1986 6 11 16 3 11 7 5 2 8 15 19 11 114 1987 9 9 14 14 2 1 5 3 13 15 7 12 104 1988 14 9 8 7 7 5 5 11 18 13 19 8 124 1989 15 8 11 3 3 0 3 4 8 12 6 16 89 1990 12 9 6 8 5 3 3 4 5 13 4 14 86 1991 8 7 7 3 4 1 4 1 8 8 12 7 70 1992 9 11 10 11 11 9 6 9 11 14 9 14 124 1993 16 13 11 9 15 12 9 6 13 12 23 11 150 1994 12 18 15 9 7 12 0 5 5 13 14 11 121 1995 8 8 7 7 7 7 2 7 8 11 2 13 87 1996 11 13 16 13 5 13 4 3 11 11 10 5 115 1997 9 18 11 1 3 14 9 3 16 6 9 9 108 1998 13 7 6 8 10 4 5 7 12 9 14 11 106 1999 8 3 9 10 10 2 4 6 12 13 11 6 94 2000 17 9 13 3 9 7 0 8 16 18 16 14 130 2001 12 7 7 6 9 2 4 7 10 15 13 13 105 2002 10 7 11 16 12 2 5 8 5 14 12 18 120 2003 9 15 18 9 7 5 5 7 15 8 13 14 125 MEAN 11 10 11 7 7 5 4 6 10 12 11 11 105 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 14 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. NO. OF DAYS PRECIPITATION EQUAL OR MORE THAN 10 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 3 5 4 9 1 0 0 2 4 2 3 1 34 1965 7 1 7 1 1 1 3 2 5 12 2 4 46 1966 3 2 3 3 4 0 0 4 8 10 4 1 42 1967 3 7 5 3 2 1 0 1 5 6 4 5 42 1968 3 7 5 6 1 1 3 0 3 6 7 6 48 1969 7 9 7 5 2 3 4 1 10 8 7 4 67 1970 5 0 7 1 1 1 3 5 4 4 6 7 44 1971 5 3 3 6 0 1 0 0 1 5 2 8 34 1972 11 5 6 1 3 1 1 1 3 5 10 9 56 1973 3 2 7 1 *** 2 0 4 8 4 5 7 *** 1974 5 5 7 4 1 3 7 7 3 0 7 4 53 1975 3 4 3 1 1 1 0 3 9 7 *** 6 *** 1976 4 *** 5 0 3 2 3 0 7 9 3 5 *** 1977 5 1 0 1 2 2 0 4 3 9 6 6 39 1978 3 4 4 1 4 2 0 2 1 8 9 5 43 1979 6 4 2 3 3 0 3 1 3 7 5 4 41 1980 *** *** 3 1 1 0 0 2 4 5 2 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 5 9 7 0 3 1 0 6 2 12 10 3 58 1983 *** 0 5 2 3 3 1 4 5 4 7 4 *** 1984 3 5 5 2 4 1 0 4 1 3 6 7 41 1985 4 4 8 0 0 0 2 1 3 5 10 10 47 1986 2 6 6 1 0 2 2 1 3 7 8 6 44 1987 1 3 2 2 0 0 2 2 4 11 5 4 36 1988 8 2 1 3 1 3 2 8 7 5 5 2 47 1989 9 7 6 1 1 0 1 3 7 6 4 12 57 1990 10 6 4 5 2 0 2 2 1 12 4 11 59 1991 6 7 7 2 2 0 4 0 5 6 10 7 56 1992 6 5 6 9 4 3 4 3 8 8 6 9 71 1993 9 10 6 1 3 6 3 1 8 10 15 4 76 1994 2 10 2 3 4 8 0 2 1 6 7 4 49 1995 1 3 2 2 0 1 1 2 4 7 1 3 27 1996 5 3 8 5 0 3 1 0 7 7 3 2 44 1997 4 3 6 1 0 4 7 0 11 3 5 4 48 1998 6 5 1 0 1 1 3 1 7 5 6 4 40 1999 4 1 1 6 4 0 2 2 8 8 6 3 45 2000 7 6 7 0 1 1 0 2 4 8 9 5 50 2001 5 1 4 0 2 0 2 1 4 6 7 3 35 2002 2 4 2 5 3 0 0 1 2 3 5 9 36 2003 1 5 5 5 2 2 1 2 5 2 9 8 47 MEAN 5 4 5 3 2 2 2 2 5 6 6 5 47 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 15 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 85 91 91 91 89 85 69 88 92 93 80 85 87 1965 85 72 88 90 84 84 65 89 86 93 50 72 80 1966 83 79 83 83 90 69 81 89 94 94 70 52 81 1967 86 85 85 78 81 73 80 84 70 92 82 86 82 1968 70 92 80 88 82 85 87 88 87 68 93 89 84 1969 87 90 94 83 84 83 85 87 90 91 90 86 88 1970 89 89 89 85 87 84 79 87 90 91 92 88 88 1971 87 83 90 84 83 74 72 76 70 78 85 76 80 1972 85 80 86 81 82 80 78 77 89 90 85 85 83 1973 85 77 85 83 *** 83 80 83 90 79 75 70 *** 1974 89 91 82 76 79 81 85 84 63 81 80 74 80 1975 81 85 86 82 84 82 68 77 75 89 *** 79 *** 1976 72 *** 67 80 80 81 84 85 88 86 81 83 *** 1977 78 80 82 82 85 87 83 86 89 93 92 85 85 1978 80 87 85 85 90 90 87 87 88 82 80 77 85 1979 80 83 88 90 81 85 82 84 92 88 88 85 86 1980 *** *** 86 82 86 80 76 85 91 88 87 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 88 85 90 85 90 89 87 91 91 93 90 83 89 1983 *** 82 82 84 87 89 83 88 93 91 82 90 *** 1984 90 92 92 93 85 83 84 90 91 90 92 89 89 1985 92 85 90 86 87 85 84 86 91 95 94 92 89 1986 86 88 91 86 90 83 89 90 90 92 92 86 89 1987 84 89 90 86 88 84 88 89 91 93 87 88 88 1988 90 87 81 85 87 84 87 89 89 85 84 84 86 1989 83 87 77 80 76 79 82 83 81 82 81 79 81 1990 83 79 76 79 77 80 80 79 83 80 81 81 80 1991 82 82 77 79 77 78 80 81 81 83 82 79 80 1992 83 74 78 75 76 75 77 80 79 78 80 78 78 1993 74 79 71 78 79 75 77 77 81 91 90 87 80 1994 87 87 78 81 81 79 83 87 89 89 93 91 85 1995 93 95 95 88 88 84 83 95 96 97 89 90 91 1996 95 92 94 93 86 88 83 90 92 94 96 91 91 1997 95 92 91 83 90 93 93 92 97 95 96 96 93 1998 92 94 91 90 93 83 86 90 94 93 95 95 91 1999 93 85 93 92 91 84 86 91 93 94 92 91 90 2000 88 90 88 91 89 85 82 87 93 94 95 93 90 2001 94 88 90 93 92 85 83 90 95 95 94 91 91 2002 90 89 92 94 92 86 86 90 94 96 95 95 92 2003 89 91 95 88 94 93 89 93 95 95 95 89 92 MEAN 86 86 86 85 85 83 82 86 88 89 86 84 86 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 16 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 62 72 83 74 67 63 64 69 76 74 70 69 70 1965 81 72 78 76 68 61 68 69 73 82 69 57 71 1966 65 76 72 67 70 62 63 65 74 79 73 73 70 1967 63 80 73 68 59 62 59 61 75 78 75 70 69 1968 58 77 69 68 57 57 62 67 64 77 80 75 68 1969 83 83 87 68 67 61 67 67 74 80 71 79 74 1970 77 66 73 60 63 58 57 67 72 79 76 76 69 1971 71 72 75 69 59 55 55 53 56 68 71 69 64 1972 77 75 79 62 67 65 *** 61 69 79 70 76 *** 1973 71 63 70 64 *** 69 61 70 81 77 70 74 *** 1974 82 72 70 68 73 62 71 71 74 55 78 69 70 1975 68 69 69 58 68 62 49 61 71 77 *** 68 *** 1976 58 *** 75 65 71 65 63 62 75 71 64 79 *** 1977 *** 73 78 62 65 63 63 70 74 79 75 75 *** 1978 71 77 74 70 73 69 64 66 71 76 78 71 72 1979 66 70 70 74 65 65 61 54 66 74 76 74 68 1980 *** *** 78 74 71 62 54 71 80 83 86 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 72 65 71 68 75 71 68 77 70 80 79 70 72 1983 *** 59 63 59 65 71 61 72 76 73 68 73 *** 1984 75 76 79 77 68 68 59 76 67 68 77 77 72 1985 76 63 80 69 65 65 71 61 71 78 79 80 72 1986 71 76 77 70 68 60 65 62 66 74 78 70 70 1987 68 73 75 71 66 55 62 67 74 76 71 72 69 1988 77 75 68 70 68 63 66 68 72 71 67 71 70 1989 71 72 71 72 69 61 62 66 68 65 66 68 68 1990 70 69 71 68 68 64 66 71 72 74 73 76 70 1991 73 73 72 70 65 64 63 69 71 71 70 74 70 1992 69 65 67 68 63 57 63 65 68 65 64 68 65 1993 69 63 66 66 63 65 64 62 70 70 77 73 67 1994 69 71 71 70 70 70 61 71 68 70 76 75 70 1995 72 79 72 68 62 60 59 69 75 77 62 64 68 1996 81 76 80 73 66 68 63 62 70 72 74 70 71 1997 69 74 70 60 62 76 76 69 80 76 77 73 72 1998 80 74 57 67 76 59 63 62 78 71 78 80 70 1999 67 60 73 65 70 61 64 65 71 69 72 66 67 2000 71 72 67 61 75 62 56 60 75 80 79 73 69 2001 76 65 66 69 70 60 61 61 73 77 70 76 69 2002 73 59 63 78 71 60 56 63 62 71 73 79 67 2003 68 75 80 72 60 66 63 62 73 66 74 65 69 MEAN 71 71 73 68 67 63 62 66 72 74 73 72 69 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 17 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 80 85 87 81 76 74 73 78 86 84 76 78 80 1965 83 75 80 79 71 71 87 77 83 88 79 74 79 1966 64 85 79 76 77 69 85 77 81 83 79 92 79 1967 66 80 77 72 47 63 65 67 81 82 78 75 71 1968 65 81 71 76 70 81 72 74 72 85 83 79 76 1969 87 87 88 76 76 73 73 76 83 89 76 78 80 1970 77 71 79 68 71 68 60 75 82 86 83 85 75 1971 80 77 76 73 72 63 60 64 83 77 78 74 73 1972 85 79 80 71 74 65 67 72 77 82 72 78 75 1973 76 62 71 68 *** 73 68 77 83 83 81 88 *** 1974 80 77 77 65 71 64 76 75 77 87 82 73 75 1975 76 77 76 59 79 79 67 74 78 84 *** 76 *** 1976 65 *** 73 69 76 69 71 72 82 81 70 82 *** 1977 73 72 77 69 69 70 70 67 73 82 73 75 73 1978 76 77 75 71 76 73 66 67 64 76 77 75 73 1979 70 71 69 78 66 67 64 56 71 76 77 76 70 1980 *** *** 77 75 70 62 55 69 79 86 89 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 81 80 81 76 79 75 73 82 67 84 88 77 79 1983 *** 72 66 77 72 78 69 78 80 77 78 84 *** 1984 80 87 82 81 74 71 72 80 75 71 78 83 78 1985 85 75 89 75 74 70 74 67 77 83 83 85 78 1986 78 79 83 73 74 70 69 68 73 78 83 77 75 1987 75 79 81 78 73 65 69 76 80 82 78 82 77 1988 86 81 75 78 77 69 74 77 78 78 77 80 78 1989 79 80 77 78 77 70 71 76 77 74 78 76 76 1990 80 78 76 76 78 74 76 82 81 79 80 80 78 1991 77 76 77 77 74 70 69 73 75 74 75 78 75 1992 73 70 72 72 69 61 67 68 71 70 68 72 69 1993 69 69 68 72 72 71 72 70 76 81 82 80 74 1994 78 78 75 75 74 74 73 81 82 84 85 88 79 1995 85 79 82 74 74 68 70 81 86 91 77 81 79 1996 91 86 86 80 75 78 75 74 84 84 87 78 82 1997 86 84 84 72 80 84 84 80 91 91 90 90 85 1998 92 86 85 82 86 74 73 76 89 87 90 90 84 1999 82 69 85 79 81 70 72 81 85 88 86 84 80 2000 81 84 78 79 81 74 67 76 87 91 90 88 81 2001 89 81 81 85 84 73 73 80 87 87 86 84 83 2002 86 79 76 86 81 65 64 74 75 84 85 88 79 2003 79 82 86 79 64 75 70 73 81 82 86 79 78 MEAN 79 78 78 75 74 71 71 74 79 82 81 81 77 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 18 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. NO. OF DAYS MINIMUM TEMPERATURE EQUAL OR LESS THAN -4 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 5 1 0 0 0 *** *** *** *** 0 0 0 *** 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 1966 0 0 *** 0 0 0 0 0 0 0 0 0 *** 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 1968 0 *** 0 0 0 0 0 0 0 0 0 0 *** 1969 0 0 0 0 0 0 0 0 0 0 0 0 0 1970 0 0 0 0 0 0 0 0 0 0 0 0 0 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 1972 0 18 1 0 0 0 0 0 0 0 0 4 23 1973 14 0 0 0 *** 0 0 0 0 0 0 0 *** 1974 0 0 0 0 0 0 0 0 0 0 0 *** *** 1975 *** *** *** *** 0 0 0 0 0 0 *** 0 *** 1976 0 *** 1 0 0 0 0 0 0 0 0 0 *** 1977 0 0 0 0 0 0 0 0 0 0 0 0 0 1978 0 0 0 0 0 0 0 0 0 0 0 0 0 1979 0 0 0 0 0 0 0 0 0 0 0 0 0 1980 *** *** 0 0 0 0 0 0 0 0 0 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 *** 0 0 0 0 0 0 0 0 0 0 0 *** 1984 0 1 0 0 0 0 0 0 0 0 0 0 1 1985 0 0 1 0 0 0 0 0 0 0 0 0 1 1986 0 0 0 0 0 0 0 0 0 0 0 0 0 1987 0 0 0 0 0 0 0 0 0 0 0 0 0 1988 0 0 0 0 0 0 0 0 0 0 0 0 0 1989 0 0 0 0 0 0 0 0 0 0 0 0 0 1990 0 0 0 0 0 0 0 0 0 0 0 0 0 1991 0 0 0 0 0 0 0 0 0 0 0 0 0 1992 0 0 0 0 0 0 0 0 0 0 0 0 0 1993 0 2 0 0 0 0 0 0 0 0 0 0 2 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 0 0 0 0 0 0 0 0 0 0 0 0 0 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 2001 2 0 0 0 0 0 0 0 0 0 0 0 2 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 1 1 0 0 0 0 0 0 0 0 0 0 2 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 19 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. NO. OF DAYS MINIMUM TEMPERATURE EQUAL OR MORE THAN 21 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 0 0 0 0 0 *** *** *** *** 0 0 0 *** 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 1966 0 0 *** 0 0 2 5 24 1 0 0 0 *** 1967 0 0 0 0 0 3 5 22 2 0 0 0 32 1968 0 *** 0 0 0 5 16 17 2 0 0 0 *** 1969 0 0 0 0 0 1 0 1 0 0 0 0 2 1970 0 0 0 0 0 2 9 14 0 0 0 0 25 1971 0 0 0 0 0 0 15 5 4 0 0 0 24 1972 0 0 0 0 0 0 4 2 3 0 0 0 9 1973 0 0 0 0 *** 0 0 20 0 0 0 0 *** 1974 0 0 0 0 0 0 2 0 0 0 0 *** *** 1975 *** *** *** *** 0 1 12 1 2 0 *** 0 *** 1976 0 *** 0 0 0 3 10 24 6 0 0 0 *** 1977 0 0 0 0 0 2 17 14 0 0 0 0 33 1978 0 0 0 0 0 0 10 13 2 0 0 0 25 1979 0 0 0 0 0 0 18 6 7 0 0 0 31 1980 *** *** 0 0 0 0 3 2 1 0 0 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 0 0 0 0 0 0 14 4 3 0 0 0 21 1983 *** 0 0 0 0 2 23 19 1 0 0 0 *** 1984 0 0 0 0 0 3 26 11 2 0 0 0 42 1985 0 0 0 0 0 6 14 14 7 0 0 0 41 1986 0 0 0 0 0 0 11 16 4 0 0 0 31 1987 0 0 0 0 0 4 11 16 0 0 0 0 31 1988 0 0 0 0 0 7 16 4 0 0 0 0 27 1989 0 0 0 0 0 1 9 5 0 0 0 0 15 1990 0 0 0 0 0 0 14 1 0 0 0 0 15 1991 0 0 0 0 0 0 1 0 0 0 0 0 1 1992 0 0 0 0 0 0 0 0 0 0 0 0 0 1993 0 0 0 0 0 0 0 0 0 0 0 0 0 1994 0 0 0 0 0 0 6 3 0 0 0 0 9 1995 0 0 0 0 0 3 15 23 7 0 0 0 48 1996 0 0 0 0 0 2 14 19 9 0 0 0 44 1997 0 0 0 0 0 9 21 26 1 0 0 0 57 1998 0 0 0 0 0 4 12 26 4 0 0 0 46 1999 0 0 0 0 0 1 6 30 5 0 0 0 42 2000 0 0 0 0 0 0 13 25 3 0 0 0 41 2001 0 0 0 0 0 2 11 20 8 0 0 0 41 2002 0 0 0 0 0 2 18 22 4 1 0 0 47 2003 0 0 0 0 0 0 11 13 2 0 0 0 26 MEAN 0 0 0 0 0 2 10 12 2 0 0 0 26 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 20 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. NO. OF DAYS MAXIMUM TEMPERATURE EQUAL OR LESS THAN 0 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 0 0 0 0 0 0 0 0 0 0 0 0 0 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 1966 0 0 *** 0 0 0 0 0 0 0 0 0 *** 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 1968 0 0 0 0 0 0 0 0 0 0 0 0 0 1969 0 0 0 0 0 0 0 0 0 0 0 0 0 1970 0 0 0 0 0 0 0 0 0 0 0 0 0 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 1972 0 0 0 0 0 0 0 0 0 0 0 0 0 1973 0 0 0 0 *** 0 0 0 0 0 0 0 *** 1974 0 0 0 0 0 0 0 0 0 0 0 0 0 1975 0 0 0 0 0 0 0 0 0 0 *** 0 *** 1976 0 *** 0 0 0 0 0 0 0 0 0 0 *** 1977 0 0 0 0 0 0 0 0 0 *** 0 *** *** 1978 *** 0 0 0 0 0 0 0 0 0 0 0 *** 1979 0 0 0 0 0 0 0 0 0 0 0 0 0 1980 *** *** 0 0 0 0 0 0 0 0 0 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 *** 0 0 0 0 0 0 0 0 0 0 0 *** 1984 0 0 0 0 0 0 0 0 0 0 0 0 0 1985 0 0 0 0 0 0 0 0 0 0 0 0 0 1986 0 0 0 0 0 0 0 0 0 0 0 0 0 1987 0 0 0 0 0 0 0 0 0 0 0 0 0 1988 0 0 0 0 0 0 0 0 0 0 0 0 0 1989 0 0 0 0 0 0 0 0 0 0 0 0 0 1990 0 0 0 0 0 0 0 0 0 0 0 0 0 1991 0 0 0 0 0 0 0 0 0 0 0 0 0 1992 0 0 0 0 0 0 0 0 0 0 0 0 0 1993 0 0 0 0 0 0 0 0 0 0 0 0 0 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 0 1 0 0 0 0 0 0 0 0 0 0 1 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 0 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 21 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. NO. OF DAYS MAXIMUM TEMPERATURE EQUAL OR MORE THAN 30 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 0 0 0 0 0 19 25 25 1 0 5 0 75 1965 0 0 0 2 4 18 19 23 7 0 2 1 76 1966 0 0 *** 0 0 12 24 25 3 0 0 0 *** 1967 0 0 0 0 6 7 13 27 5 2 0 0 60 1968 0 0 1 0 4 6 18 21 20 1 0 0 71 1969 0 0 0 0 2 19 12 17 10 0 0 0 60 1970 0 0 2 0 9 6 24 20 5 1 0 0 67 1971 0 0 0 1 4 11 29 22 24 0 0 0 91 1972 0 0 0 2 2 15 28 27 9 0 0 0 83 1973 0 1 0 1 *** 5 17 18 1 0 3 0 *** 1974 0 0 1 1 1 9 12 0 0 3 0 0 27 1975 0 0 0 0 2 18 31 22 9 0 *** 0 *** 1976 0 *** 0 3 0 3 11 28 15 1 1 0 *** 1977 0 0 0 3 1 10 21 24 8 *** 0 *** *** 1978 *** 0 0 3 0 2 24 17 23 15 2 0 *** 1979 1 0 0 2 0 10 30 29 24 2 11 0 109 1980 *** *** 0 0 24 21 29 29 10 0 0 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 0 0 0 1 0 3 15 10 4 0 0 0 33 1983 *** 0 0 1 2 3 21 9 2 0 0 0 *** 1984 0 0 0 0 2 5 18 9 2 1 0 0 37 1985 0 0 0 0 1 9 8 20 10 0 0 0 48 1986 0 0 0 1 1 14 21 26 12 1 0 0 76 1987 0 0 0 0 2 19 21 16 0 0 0 0 58 1988 0 0 1 1 0 15 15 8 2 0 0 0 42 1989 0 0 0 0 2 16 22 22 4 0 1 0 67 1990 0 0 0 0 0 9 27 14 3 0 0 0 53 1991 0 0 0 0 0 12 16 2 0 0 0 0 30 1992 0 0 0 0 0 3 4 0 0 0 0 0 7 1993 0 0 0 0 0 2 11 4 1 1 0 0 19 1994 0 0 0 1 1 0 16 9 0 1 0 0 28 1995 0 0 0 1 2 11 8 18 13 1 1 0 55 1996 0 0 0 0 2 3 20 21 9 2 0 0 57 1997 0 0 0 1 1 3 11 21 2 3 0 0 42 1998 0 0 0 1 2 19 22 23 1 1 0 0 69 1999 0 0 0 0 0 1 17 26 3 1 0 0 48 2000 0 0 0 1 0 6 26 23 3 0 0 0 59 2001 0 0 1 0 0 5 19 23 2 0 0 0 50 2002 0 0 1 0 1 5 24 21 14 2 0 0 68 2003 0 0 0 1 1 0 10 21 6 2 0 0 41 MEAN 0 0 0 1 2 9 19 18 7 1 1 0 58 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 22 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. NO. OF DAYS MAXIMUM TEMPERATURE EQUAL OR MORE THAN 40 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 0 0 0 0 0 0 0 0 0 0 0 0 0 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 1966 0 0 *** 0 0 0 0 0 0 0 0 0 *** 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 1968 0 0 0 0 0 0 0 0 0 0 0 0 0 1969 0 0 0 0 0 0 0 0 0 0 0 0 0 1970 0 0 0 0 0 0 0 0 0 0 0 0 0 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 1972 0 0 0 0 0 0 0 0 0 0 0 0 0 1973 0 0 0 0 *** 0 0 0 0 0 0 0 *** 1974 0 0 0 0 0 0 0 0 0 0 0 0 0 1975 0 0 0 0 0 0 0 0 0 0 *** 0 *** 1976 0 *** 0 0 0 0 0 0 0 0 0 0 *** 1977 0 0 0 0 0 0 0 0 0 *** 0 *** *** 1978 *** 0 0 0 0 0 0 0 0 0 0 0 *** 1979 0 0 0 0 0 0 0 0 0 0 0 0 0 1980 *** *** 0 0 0 0 0 0 0 0 0 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 *** 0 0 0 0 0 0 0 0 0 0 0 *** 1984 0 0 0 0 0 0 0 0 0 0 0 0 0 1985 0 0 0 0 0 0 0 0 0 0 0 0 0 1986 0 0 0 0 0 0 0 0 0 0 0 0 0 1987 0 0 0 0 0 0 0 0 0 0 0 0 0 1988 0 0 0 0 0 0 0 0 0 0 0 0 0 1989 0 0 0 0 0 0 0 0 0 0 0 0 0 1990 0 0 0 0 0 0 0 0 0 0 0 0 0 1991 0 0 0 0 0 0 0 0 0 0 0 0 0 1992 0 0 0 0 0 0 0 0 0 0 0 0 0 1993 0 0 0 0 0 0 0 0 0 0 0 0 0 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 0 0 0 0 0 0 0 0 0 0 0 0 0 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 0 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 23 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. NO. OF DAYS MAXIMUM TEMPERATURE EQUAL OR MORE THAN 45 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 0 0 0 0 0 0 0 0 0 0 0 0 0 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 1966 0 0 *** 0 0 0 0 0 0 0 0 0 *** 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 1968 0 0 0 0 0 0 0 0 0 0 0 0 0 1969 0 0 0 0 0 0 0 0 0 0 0 0 0 1970 0 0 0 0 0 0 0 0 0 0 0 0 0 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 1972 0 0 0 0 0 0 0 0 0 0 0 0 0 1973 0 0 0 0 *** 0 0 0 0 0 0 0 *** 1974 0 0 0 0 0 0 0 0 0 0 0 0 0 1975 0 0 0 0 0 0 0 0 0 0 *** 0 *** 1976 0 *** 0 0 0 0 0 0 0 0 0 0 *** 1977 0 0 0 0 0 0 0 0 0 *** 0 *** *** 1978 *** 0 0 0 0 0 0 0 0 0 0 0 *** 1979 0 0 0 0 0 0 0 0 0 0 0 0 0 1980 *** *** 0 0 0 0 0 0 0 0 0 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 *** 0 0 0 0 0 0 0 0 0 0 0 *** 1984 0 0 0 0 0 0 0 0 0 0 0 0 0 1985 0 0 0 0 0 0 0 0 0 0 0 0 0 1986 0 0 0 0 0 0 0 0 0 0 0 0 0 1987 0 0 0 0 0 0 0 0 0 0 0 0 0 1988 0 0 0 0 0 0 0 0 0 0 0 0 0 1989 0 0 0 0 0 0 0 0 0 0 0 0 0 1990 0 0 0 0 0 0 0 0 0 0 0 0 0 1991 0 0 0 0 0 0 0 0 0 0 0 0 0 1992 0 0 0 0 0 0 0 0 0 0 0 0 0 1993 0 0 0 0 0 0 0 0 0 0 0 0 0 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 0 0 0 0 0 0 0 0 0 0 0 0 0 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 0 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 24 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. NO. OF FREEZING DAYS , DATE OF START AND END FREEZING START END YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MO DAY MO DAY -------------- 1964 27 2 0 0 0 *** *** *** *** 0 0 5 *** 12 26 2 4 1965 11 3 1 0 0 0 0 0 0 0 0 0 15 1 1 3 12 1966 0 0 *** 0 0 0 0 0 0 0 0 0 *** ** ** ** ** 1967 0 5 1 0 0 0 0 0 0 0 0 3 9 12 24 3 29 1968 3 *** 1 0 0 0 0 0 0 0 0 0 *** 1 17 3 22 1969 12 15 2 0 0 0 0 0 0 0 0 0 29 1 5 3 24 1970 1 0 0 0 0 0 0 0 0 0 0 0 1 1 28 1 28 1971 11 5 0 0 0 0 0 0 0 0 0 0 16 1 15 2 16 1972 17 27 22 0 0 0 0 0 0 0 1 14 81 11 29 3 27 1973 29 7 4 0 *** 0 0 0 0 0 0 1 *** 12 13 3 9 1974 12 8 3 1 0 0 0 0 0 0 0 *** *** 1 14 4 11 1975 *** *** *** *** 0 0 0 0 0 0 *** 1 *** 12 5 12 5 1976 2 *** 10 0 0 0 0 0 0 0 0 0 *** 1 28 3 14 1977 28 2 0 0 0 0 0 0 0 0 0 0 30 1 4 2 2 1978 0 0 0 0 0 0 0 0 0 0 0 1 1 12 24 12 24 1979 7 1 6 0 0 0 0 0 0 0 0 0 14 1 9 3 8 1980 *** *** 5 0 0 0 0 0 0 0 0 *** *** 3 8 3 18 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1982 3 7 0 0 0 0 0 0 0 0 0 3 13 12 8 2 19 1983 *** 1 4 0 0 0 0 0 0 0 0 0 *** 2 23 3 9 1984 3 10 0 0 0 0 0 0 0 0 0 3 16 12 6 2 21 1985 5 7 13 0 0 0 0 0 0 0 0 0 25 1 3 3 16 1986 3 2 0 0 0 0 0 0 0 0 0 3 8 12 12 2 4 1987 0 1 0 0 0 0 0 0 0 0 0 1 2 12 29 2 7 1988 2 7 0 0 0 0 0 0 0 0 0 3 12 12 28 2 17 1989 8 8 1 0 0 0 0 0 0 0 0 0 17 1 5 3 30 1990 4 0 0 0 0 0 0 0 0 0 0 0 4 1 11 1 30 1991 0 1 0 0 0 0 0 0 0 0 0 0 1 2 15 2 15 1992 5 3 5 0 0 0 0 0 0 0 0 0 13 1 26 3 14 1993 3 7 0 0 0 0 0 0 0 0 0 1 11 12 7 2 23 1994 0 8 0 0 0 0 0 0 0 0 0 5 13 12 6 2 21 1995 1 1 0 0 0 0 0 0 0 0 0 5 7 12 19 2 26 1996 6 5 3 0 0 0 0 0 0 0 0 0 14 1 10 3 20 1997 4 10 4 0 0 0 0 0 0 0 0 1 19 12 29 3 22 1998 7 15 0 0 0 0 0 0 0 0 0 0 22 1 4 2 28 1999 3 1 0 0 0 0 0 0 0 0 0 0 4 1 3 2 1 2000 3 5 4 0 0 0 0 0 0 0 0 0 12 1 22 3 17 2001 9 3 0 0 0 0 0 0 0 0 0 1 13 12 22 2 14 2002 5 4 1 0 0 0 0 0 0 0 0 9 19 12 14 3 7 2003 2 2 4 0 0 0 0 0 0 0 0 4 12 12 11 3 31 MEAN 7 5 3 0 0 0 0 0 0 0 0 2 17 11 29 4 11 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 25 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 3.7 6.8 9.2 12.6 19.8 25.0 26.3 24.3 21.6 17.1 14.8 8.1 15.8 1965 5.8 9.1 9.0 12.3 19.2 24.3 26.1 25.5 21.8 16.1 15.9 13.8 16.6 1966 13.2 10.6 11.5 15.6 18.9 25.9 26.3 27.4 21.9 17.7 16.2 12.6 18.1 1967 10.2 5.4 9.1 13.9 20.9 22.9 25.0 26.5 22.0 18.4 14.8 10.8 16.7 1968 10.1 7.3 9.4 12.7 20.5 21.9 25.4 25.1 23.8 20.4 13.9 9.6 16.7 1969 3.9 3.0 6.3 12.1 18.1 23.8 23.6 24.8 21.2 16.9 11.5 11.3 14.7 1970 8.0 10.7 11.0 15.7 20.9 22.8 26.0 25.0 21.3 17.4 15.1 9.4 16.9 1971 7.1 7.8 10.9 13.8 21.1 23.7 27.8 26.4 25.2 19.0 15.0 10.5 17.4 1972 2.5 2.0 5.9 16.9 19.0 25.2 27.8 26.4 23.7 20.7 14.8 5.9 15.9 1973 3.9 10.1 9.6 14.9 ****** 22.7 25.8 25.8 20.1 18.3 13.2 8.1 ****** 1974 4.2 5.0 7.9 12.4 20.4 24.4 23.9 21.3 16.5 21.2 11.5 10.0 14.9 1975 8.2 7.5 10.0 17.0 21.0 25.2 28.0 25.7 22.7 16.9 ****** 8.5 ****** 1976 9.5 ****** 5.9 15.8 18.8 23.7 25.3 27.6 22.5 16.3 13.9 9.2 ****** 1977 ****** 8.5 10.2 16.0 19.7 24.5 25.7 25.1 22.8 14.9 13.7 8.8 ****** 1978 8.7 7.7 10.6 14.3 16.8 20.8 26.0 24.7 24.5 20.9 10.9 11.5 16.5 1979 8.4 9.6 10.8 14.4 19.5 22.6 26.6 27.4 24.2 19.4 14.8 11.2 17.4 1980 ****** ****** 8.3 14.4 19.8 25.0 28.8 25.5 21.6 16.5 14.3 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 7.5 5.4 8.5 15.8 18.6 22.7 25.9 23.7 23.7 16.2 10.2 7.8 15.5 1983 ****** 8.8 9.8 15.5 20.9 23.0 27.2 24.5 21.1 17.2 15.2 9.2 ****** 1984 8.3 3.2 8.0 14.6 18.0 22.4 26.5 24.0 22.8 18.0 13.6 5.3 15.4 1985 6.2 7.6 5.8 15.1 20.3 24.7 24.4 25.8 22.5 16.5 13.9 8.7 16.0 1986 8.7 7.6 6.7 15.1 18.4 23.3 25.9 26.2 24.6 17.5 11.5 8.9 16.2 1987 10.0 8.5 8.8 11.4 19.6 24.7 25.3 24.9 21.1 13.4 12.0 9.3 15.8 1988 6.5 7.5 12.2 16.1 18.4 25.4 26.1 24.3 22.0 18.4 13.9 12.3 16.9 1989 6.4 6.4 12.6 16.6 20.2 25.0 26.4 26.3 22.7 19.0 16.0 11.7 17.4 1990 7.8 11.1 14.1 15.2 18.8 24.3 27.1 25.3 23.3 21.6 22.4 19.0 19.2 1991 9.3 9.7 11.5 13.8 16.3 23.6 25.0 23.4 22.1 20.6 14.5 12.3 16.9 1992 8.9 8.3 9.2 12.6 14.7 21.5 20.9 22.5 21.4 18.5 15.9 12.8 15.6 1993 10.3 7.6 11.1 14.1 16.4 20.9 23.5 23.7 21.4 17.2 8.9 8.7 15.3 1994 10.2 7.2 13.5 17.1 20.1 20.7 24.7 24.8 21.8 18.2 13.4 7.3 16.6 1995 8.4 8.2 9.9 15.6 20.6 24.7 25.5 26.2 23.1 16.6 15.0 8.4 16.9 1996 5.8 7.3 6.8 11.9 20.2 21.9 26.4 26.0 23.3 18.4 12.9 12.1 16.1 1997 8.3 5.4 7.8 15.4 20.0 23.6 24.8 26.0 20.0 20.2 12.8 9.3 16.1 1998 5.6 4.9 10.1 16.2 20.0 25.7 26.1 26.8 21.7 18.1 14.8 10.7 16.7 1999 8.7 11.5 10.3 14.3 18.2 23.2 25.4 27.9 22.3 18.9 11.9 10.8 17.0 2000 7.8 7.6 9.3 17.7 18.4 22.5 27.3 26.9 22.8 16.5 12.4 9.8 16.6 2001 6.7 9.6 12.2 15.4 19.8 23.6 25.8 26.4 23.0 18.0 13.8 11.2 17.1 2002 7.3 9.9 12.5 13.1 17.5 23.8 26.9 26.1 24.4 20.6 14.2 5.6 16.8 2003 8.7 7.4 7.3 11.8 18.8 21.8 24.9 25.7 21.8 20.4 12.9 10.3 16.0 MEAN 7.6 7.6 9.6 14.6 19.2 23.5 25.8 25.4 22.3 18.2 13.9 10.0 16.5 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 26 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 -1.2 3.8 7.1 9.2 15.5 19.7 19.7 20.0 18.7 14.2 9.4 3.3 11.6 1965 2.8 3.2 5.9 9.0 14.1 18.5 20.4 21.2 18.0 13.9 8.2 6.8 11.8 1966 6.7 6.7 7.1 10.5 14.8 18.8 21.2 22.6 18.7 14.9 11.1 6.8 13.3 1967 4.6 2.2 5.3 8.6 12.6 15.7 18.4 20.4 16.8 15.4 10.8 6.5 11.4 1968 2.0 4.4 4.0 8.5 14.1 16.6 19.9 20.3 18.5 15.9 11.3 5.9 11.8 1969 1.3 0.8 4.6 7.3 13.3 18.0 18.5 20.2 17.7 14.5 7.7 7.7 11.0 1970 4.6 5.7 7.2 9.8 15.4 16.4 18.3 20.2 17.6 14.7 12.1 6.5 12.4 1971 3.4 3.5 7.3 8.7 15.3 16.1 19.4 18.6 18.9 14.0 10.9 5.1 11.8 1972 -0.5 -1.8 2.8 11.2 14.1 18.8 ****** 20.1 19.4 17.5 9.6 2.4 ****** 1973 -0.1 3.2 5.1 9.2 ****** 17.7 19.5 21.0 17.3 14.6 8.4 3.6 ****** 1974 1.5 1.5 3.6 6.6 15.5 18.1 19.3 16.8 10.9 15.5 7.8 4.3 10.1 1975 3.4 3.1 5.4 10.0 16.6 19.9 19.4 19.5 17.7 13.9 ****** 3.8 ****** 1976 2.5 ****** 0.7 10.1 14.2 18.1 19.6 21.9 19.1 12.2 7.7 6.0 ****** 1977 ****** 4.1 6.3 9.9 14.4 19.1 20.0 19.7 18.5 12.2 10.1 4.8 ****** 1978 4.0 4.4 6.7 9.7 13.0 16.3 20.2 19.3 19.2 16.7 7.1 6.4 11.9 1979 2.4 4.8 5.8 10.8 13.8 16.9 19.8 19.5 19.2 16.2 11.2 7.3 12.3 1980 ****** ****** 5.0 9.9 14.4 18.4 20.3 20.7 18.6 14.0 12.2 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 4.2 1.3 5.0 11.2 15.1 18.5 21.1 20.5 18.8 13.5 7.6 3.6 11.7 1983 ****** 3.3 4.0 10.1 16.0 19.0 21.2 20.2 17.8 13.6 10.3 6.0 ****** 1984 5.2 0.8 5.5 11.5 13.2 17.2 20.6 20.5 18.4 13.8 10.5 2.4 11.6 1985 3.4 2.3 3.6 10.8 15.5 19.3 19.6 19.6 18.5 13.8 11.3 6.3 12.0 1986 4.7 4.2 4.0 10.2 13.8 17.2 20.6 20.7 19.8 14.1 8.9 4.8 11.9 1987 5.5 5.1 5.8 7.5 14.9 17.9 19.7 20.4 17.7 10.6 8.2 6.0 11.6 1988 4.0 4.3 7.5 12.0 14.1 19.7 21.2 19.8 18.2 14.4 9.6 8.5 12.8 1989 2.8 3.0 8.2 12.4 15.4 18.9 20.7 21.3 18.0 14.0 11.4 7.2 12.8 1990 4.1 6.7 9.5 10.6 14.1 19.0 22.0 21.0 19.2 17.6 18.3 15.3 14.8 1991 5.4 5.7 7.2 9.6 11.2 17.9 19.2 18.5 17.6 16.2 10.2 8.3 12.2 1992 4.6 3.0 4.3 7.6 9.0 14.1 14.6 16.7 16.2 13.0 10.4 7.8 10.1 1993 4.9 2.4 4.7 8.8 11.1 15.2 17.8 17.4 16.9 13.4 6.1 5.3 10.3 1994 6.4 3.7 9.0 12.6 15.4 15.9 19.0 20.9 17.8 14.7 10.6 4.6 12.5 1995 5.3 5.4 6.8 11.0 15.5 18.4 19.5 22.5 20.4 14.5 10.2 4.2 12.8 1996 3.9 4.1 4.6 8.6 15.4 17.6 21.0 21.0 19.7 15.2 10.4 8.0 12.5 1997 5.2 2.4 4.4 9.2 15.4 20.7 21.7 22.0 18.0 17.8 10.6 6.8 12.9 1998 3.5 2.2 5.6 12.3 17.2 19.9 20.7 21.8 19.3 15.0 12.7 8.7 13.2 1999 5.0 5.5 7.5 10.0 14.5 17.5 20.1 23.6 19.0 15.8 8.5 7.0 12.8 2000 3.6 4.4 5.2 13.2 15.0 17.1 20.5 21.5 20.0 14.4 10.3 7.0 12.7 2001 4.3 5.2 8.1 12.1 16.4 18.0 20.1 21.7 20.1 15.5 10.5 7.8 13.3 2002 4.2 5.1 7.7 10.6 14.0 17.6 20.1 21.1 19.6 17.4 11.3 3.3 12.7 2003 4.5 4.1 5.2 8.1 13.2 17.4 19.5 20.7 18.4 16.7 10.2 5.5 12.0 MEAN 3.7 3.6 5.7 10.0 14.4 17.9 19.9 20.4 18.3 14.8 10.1 6.1 12.1 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 27 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 3.58 5.04 6.33 7.32 11.18 14.58 14.57 14.80 13.66 10.24 7.71 5.14 9.51 1965 4.68 5.06 5.85 7.41 10.15 13.48 15.34 15.98 13.03 10.14 7.22 6.47 9.57 1966 6.35 6.29 6.45 8.12 10.67 13.84 16.14 17.44 13.63 10.68 8.45 6.43 10.37 1967 5.39 4.55 5.60 7.14 9.43 11.44 13.32 15.21 12.14 11.15 8.40 6.18 9.16 1968 4.55 5.36 5.28 6.99 10.35 12.03 14.77 15.08 13.44 11.54 8.41 5.87 9.47 1969 4.28 4.03 5.30 6.46 9.66 13.16 13.48 14.94 12.92 10.51 6.71 6.64 9.01 1970 5.35 5.81 6.42 7.78 11.15 11.83 13.31 15.01 12.71 10.58 8.89 6.15 9.58 1971 4.95 5.01 6.47 7.14 11.03 11.59 14.41 13.50 13.84 10.11 8.19 5.67 9.32 1972 3.73 3.38 4.71 8.46 10.15 13.88 ****** 15.06 14.27 12.74 7.63 4.69 ****** 1973 3.85 4.90 5.49 7.31 ****** 12.84 14.39 15.79 12.48 10.65 7.09 5.07 ****** 1974 4.24 4.24 5.05 6.19 11.27 13.14 14.34 12.07 8.44 11.56 6.76 5.53 8.57 1975 4.99 4.80 5.88 7.81 11.94 14.76 14.35 14.53 12.90 10.04 ****** 5.09 ****** 1976 4.64 ****** 4.21 7.84 10.30 13.13 14.52 16.76 13.98 9.27 6.83 5.93 ****** 1977 ****** 5.19 6.12 7.76 10.38 14.01 14.77 14.72 13.53 9.10 7.75 5.50 ****** 1978 5.17 5.23 6.18 7.60 9.48 11.77 15.06 14.22 14.09 12.28 6.83 6.25 9.51 1979 4.61 5.44 6.07 8.14 9.99 12.13 14.66 14.31 14.20 11.75 8.39 6.49 9.68 1980 ****** ****** 5.51 7.69 10.86 13.41 15.07 15.49 13.73 10.27 8.98 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 5.22 4.26 5.49 8.49 10.84 13.42 15.83 15.39 13.76 9.87 6.62 5.03 9.52 1983 ****** 4.90 5.20 7.85 11.53 13.91 15.95 14.95 12.86 9.88 7.94 5.90 ****** 1984 5.58 4.01 5.63 8.57 9.67 12.45 15.35 15.31 13.34 10.12 8.01 4.53 9.38 1985 4.89 4.58 5.01 8.20 11.15 14.11 14.39 14.44 13.43 9.98 8.40 6.01 9.55 1986 5.43 5.18 5.09 7.82 10.01 12.50 15.36 15.45 14.62 10.10 7.27 5.51 9.53 1987 5.69 5.56 5.74 6.53 10.71 12.97 14.51 15.25 12.85 8.08 6.84 5.90 9.22 1988 5.10 5.34 6.62 8.98 10.26 14.62 15.88 14.77 13.23 10.36 7.63 7.07 9.99 1989 4.74 4.82 6.91 9.25 11.23 13.83 15.41 15.97 13.26 10.21 8.64 6.46 10.06 1990 5.19 6.30 7.60 8.27 10.32 13.92 16.90 15.88 14.21 12.72 13.41 11.28 11.33 1991 5.68 5.81 6.42 7.44 8.34 13.11 14.11 13.44 12.70 11.52 7.80 6.97 9.44 1992 5.43 4.75 5.22 6.53 7.19 10.35 10.66 11.98 11.68 9.44 7.86 6.61 8.14 1993 5.64 4.59 5.60 7.16 8.32 11.03 13.06 12.87 12.18 9.76 5.96 5.63 8.48 1994 6.07 5.07 7.33 9.41 11.18 11.46 13.95 15.61 13.04 10.52 8.07 5.38 9.76 1995 5.58 5.61 6.20 8.26 11.13 13.43 14.31 17.26 15.33 10.45 7.97 5.18 10.06 1996 5.14 5.16 5.33 7.02 11.13 12.64 15.83 15.73 14.59 10.89 7.96 6.76 9.85 1997 5.62 4.57 5.28 7.54 11.14 15.47 16.47 16.73 13.03 12.90 8.01 6.31 10.26 1998 4.93 4.51 5.77 9.09 12.51 14.67 15.48 16.57 14.16 10.85 9.21 7.02 10.40 1999 5.51 5.69 6.50 7.79 10.45 12.64 14.92 18.52 13.93 11.37 7.04 6.27 10.05 2000 5.05 5.26 5.57 9.58 10.72 12.34 15.34 16.25 14.74 10.27 7.86 6.28 9.94 2001 5.29 5.54 6.77 8.89 11.76 13.06 14.87 16.41 14.86 11.11 8.18 6.69 10.29 2002 5.24 5.54 6.64 8.01 10.09 12.73 14.96 15.80 14.45 12.68 8.49 4.91 9.96 2003 5.31 5.13 5.53 6.86 9.72 12.56 14.37 15.58 13.42 11.98 7.91 5.70 9.51 MEAN 5.07 5.04 5.86 7.81 10.46 13.03 14.75 15.26 13.40 10.71 7.93 6.07 9.62 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 28 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 5.80 8.15 10.21 11.79 17.89 23.20 23.18 23.55 21.78 16.41 12.40 8.30 15.22 1965 7.56 8.18 9.44 11.91 16.27 21.49 24.37 25.38 20.79 16.24 11.62 10.42 15.31 1966 10.23 10.14 10.40 13.04 17.08 22.05 25.61 27.63 21.72 17.10 13.57 10.37 16.58 1967 8.70 7.36 9.04 11.50 15.12 18.28 21.24 24.17 19.40 17.84 13.49 9.97 14.68 1968 7.36 8.65 8.52 11.25 16.57 19.21 23.50 23.99 21.42 18.44 13.51 9.48 15.16 1969 6.93 6.53 8.57 10.41 15.50 20.98 21.49 23.77 20.60 16.83 10.81 10.70 14.43 1970 8.64 9.37 10.35 12.51 17.84 18.91 21.22 23.88 20.29 16.94 14.27 9.92 15.34 1971 8.00 8.10 10.42 11.49 17.65 18.53 22.93 21.53 22.04 16.20 13.17 9.14 14.93 1972 6.03 5.48 7.62 13.59 16.27 22.11 ****** 23.93 22.71 20.34 12.27 7.58 ****** 1973 6.23 7.92 8.87 11.76 ****** 20.49 22.91 25.07 19.93 17.05 11.41 8.19 ****** 1974 6.87 6.86 8.16 9.99 18.02 20.96 22.82 19.28 13.55 18.46 10.89 8.92 13.73 1975 8.05 7.75 9.48 12.56 19.08 23.48 22.84 23.11 20.57 16.10 ****** 8.22 ****** 1976 7.51 ****** 6.80 12.61 16.51 20.94 23.10 26.57 22.27 14.86 11.00 9.56 ****** 1977 ****** 8.38 9.86 12.48 16.63 22.32 23.49 23.42 21.56 14.60 12.47 8.88 ****** 1978 8.34 8.46 9.97 12.24 15.20 18.81 23.94 22.64 22.44 19.60 10.98 10.07 15.22 1979 7.46 8.79 9.79 13.09 16.01 19.38 23.33 22.78 22.60 18.78 13.48 10.46 15.49 1980 ****** ****** 8.90 12.38 17.37 21.37 23.96 24.61 21.86 16.44 14.41 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 8.42 6.89 8.86 13.64 17.35 21.40 25.15 24.46 21.92 15.83 10.67 8.12 15.23 1983 ****** 7.92 8.39 12.63 18.44 22.15 25.33 23.78 20.53 15.84 12.77 9.51 ****** 1984 9.01 6.50 9.08 13.77 15.51 19.88 24.41 24.33 21.27 16.22 12.87 7.33 15.02 1985 7.90 7.41 8.10 13.18 17.84 22.47 22.91 22.99 21.41 15.99 13.50 9.70 15.28 1986 8.77 8.37 8.23 12.58 16.04 19.95 24.42 24.56 23.26 16.19 11.69 8.89 15.25 1987 9.18 8.97 9.26 10.53 17.14 20.70 23.09 24.23 20.50 12.98 11.02 9.52 14.76 1988 8.23 8.63 10.67 14.41 16.44 23.26 25.23 23.50 21.10 16.60 12.28 11.39 15.98 1989 7.66 7.78 11.13 14.84 17.95 22.03 24.49 25.36 21.13 16.35 13.87 10.42 16.09 1990 8.38 10.15 12.23 13.29 16.52 22.18 26.78 25.22 22.62 20.30 21.38 18.02 18.09 1991 9.17 9.37 10.35 11.98 13.40 20.90 22.46 21.42 20.28 18.43 12.55 11.22 15.13 1992 8.76 7.68 8.43 10.53 11.58 16.56 17.06 19.15 18.68 15.15 12.64 10.66 13.07 1993 9.10 7.42 9.03 11.53 13.38 17.64 20.83 20.52 19.45 15.64 9.62 9.09 13.60 1994 9.79 8.19 11.80 15.09 17.88 18.33 22.22 24.80 20.79 16.85 12.97 8.68 15.62 1995 9.00 9.07 10.00 13.27 17.80 21.40 22.79 27.35 24.36 16.74 12.81 8.37 16.08 1996 8.30 8.34 8.60 11.31 17.81 20.18 25.15 24.99 23.22 17.44 12.81 10.89 15.75 1997 9.08 7.39 8.52 12.12 17.83 24.59 26.13 26.54 20.79 20.58 12.89 10.17 16.39 1998 7.97 7.30 9.31 14.59 19.97 23.34 24.60 26.28 22.54 17.36 14.78 11.31 16.61 1999 8.90 9.18 10.48 12.53 16.73 20.18 23.73 29.30 22.19 18.18 11.34 10.11 16.07 2000 8.17 8.50 8.99 15.37 17.17 19.71 24.38 25.80 23.46 16.47 12.64 10.13 15.90 2001 8.54 8.95 10.91 14.27 18.80 20.83 23.65 26.04 23.64 17.78 13.14 10.77 16.44 2002 8.47 8.95 10.69 12.88 16.16 20.33 23.79 25.09 23.01 20.23 13.64 7.93 15.93 2003 8.58 8.28 8.92 11.05 15.58 20.05 22.88 24.75 21.40 19.14 12.71 9.20 15.21 MEAN 8.20 8.14 9.45 12.56 16.75 20.78 23.46 24.25 21.36 17.14 12.75 9.78 15.38 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 29 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 2.52 1.96 1.71 3.49 5.99 9.12 11.44 7.40 4.42 3.63 5.20 2.80 4.97 1965 1.73 3.91 2.36 3.12 6.70 9.48 10.11 7.78 5.83 2.67 6.76 5.84 5.52 1966 5.89 2.92 3.36 5.29 5.60 11.97 9.42 9.71 4.98 3.44 5.07 4.57 6.02 1967 4.18 1.84 2.83 5.07 10.23 10.34 10.92 11.04 7.75 3.74 3.91 3.62 6.29 1968 5.92 2.10 3.76 3.92 8.44 7.80 9.58 8.29 8.73 5.79 2.63 2.77 5.81 1969 1.38 1.22 1.09 4.33 5.98 9.35 8.22 8.04 5.45 2.77 3.24 2.99 4.50 1970 2.36 4.03 3.65 6.04 7.65 9.46 12.97 8.48 5.45 3.36 3.20 2.23 5.74 1971 2.47 2.86 2.95 5.22 7.85 11.44 14.97 13.54 10.70 6.24 4.19 4.32 7.23 1972 1.47 1.68 2.02 6.73 6.25 10.42 ****** 11.06 7.17 4.36 5.28 1.97 ****** 1973 2.05 5.22 3.50 5.73 ****** 7.65 10.70 8.73 4.14 4.63 4.58 2.96 ****** 1974 1.52 2.07 3.02 5.06 6.34 10.12 7.53 6.40 5.40 7.46 3.05 3.59 5.13 1975 3.15 2.97 3.54 7.48 6.21 9.17 15.47 10.74 7.72 3.56 ****** 3.18 ****** 1976 4.83 ****** 2.74 6.36 5.52 8.88 9.80 10.85 5.47 4.37 5.61 2.36 ****** 1977 ****** 3.22 2.86 6.46 6.89 9.15 10.09 9.17 6.70 3.02 3.57 2.86 ****** 1978 3.33 2.34 3.14 4.75 4.43 6.59 10.45 9.14 9.17 5.95 3.08 3.85 5.52 1979 4.47 4.02 3.54 3.73 7.31 8.60 12.11 14.69 8.27 5.68 3.66 3.12 6.60 1980 ****** ****** 2.43 4.73 6.22 10.99 16.39 9.07 4.97 2.69 2.13 ****** ****** 1981 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1982 2.40 2.53 2.59 5.01 4.41 6.59 8.69 5.66 7.85 3.19 2.18 2.77 4.49 1983 ****** 3.82 4.35 5.73 7.05 6.32 11.36 7.90 4.86 4.31 5.13 2.27 ****** 1984 2.23 1.27 1.85 3.11 6.11 7.84 10.76 6.25 6.74 5.70 2.98 1.70 4.71 1985 1.84 3.92 1.66 4.53 6.66 8.91 7.83 10.89 6.47 3.15 2.70 1.74 5.03 1986 2.95 2.49 1.76 5.24 5.71 9.34 9.45 9.86 8.12 4.11 2.42 3.15 5.38 1987 3.60 2.57 2.23 3.54 6.34 11.22 9.59 8.02 5.01 2.83 3.42 2.59 5.08 1988 1.65 2.37 4.42 4.53 5.52 9.74 8.97 7.41 5.70 4.91 4.21 3.44 5.24 1989 2.37 2.33 3.93 4.80 6.59 10.24 10.38 9.04 7.11 6.16 5.09 3.71 5.98 1990 2.59 3.65 4.31 4.81 5.93 8.79 9.76 7.59 6.48 5.92 6.28 4.83 5.91 1991 2.81 2.97 3.47 3.91 5.43 9.26 10.12 7.77 6.71 5.99 4.17 3.41 5.50 1992 2.99 3.47 3.40 4.29 5.38 9.85 8.24 8.42 7.14 6.47 5.61 4.23 5.79 1993 3.89 3.39 4.32 4.74 5.68 7.77 8.91 9.40 6.53 4.38 2.08 2.60 5.31 1994 3.11 2.45 4.18 5.18 6.35 6.65 9.31 6.90 5.91 4.59 2.85 1.87 4.95 1995 2.34 2.04 2.54 5.29 7.14 10.38 10.48 7.20 4.87 2.57 5.14 3.14 5.26 1996 1.16 2.70 1.48 3.08 6.45 6.49 9.83 9.28 6.08 4.27 2.38 3.58 4.73 1997 2.30 1.86 2.46 6.38 6.15 5.05 5.50 7.47 3.16 3.70 2.10 2.05 4.02 1998 1.27 1.98 3.51 4.70 4.05 10.35 9.72 9.68 3.92 4.10 2.44 1.82 4.80 1999 2.68 5.10 2.31 4.39 4.68 8.68 9.32 9.03 5.26 4.33 3.18 3.38 5.19 2000 2.93 2.30 3.13 5.55 4.38 8.07 12.49 10.40 4.67 2.52 1.87 2.27 5.05 2001 1.66 3.51 4.04 3.68 4.82 8.75 10.27 9.11 4.97 3.36 3.31 3.05 5.04 2002 2.18 3.88 4.64 2.40 4.52 9.61 12.56 9.53 8.27 4.75 3.11 1.38 5.57 2003 3.23 2.52 1.43 3.50 7.11 6.47 9.13 9.11 5.51 5.39 2.62 4.20 5.02 MEAN 2.76 2.85 2.99 4.77 6.16 8.90 10.34 8.98 6.25 4.36 3.70 3.06 5.42 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 30 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 76 83 87 82 78 74 68 79 85 84 75 77 79 1965 83 73 82 82 74 72 73 78 81 88 66 68 77 1966 71 80 78 75 79 66 76 77 83 85 74 72 76 1967 72 82 79 73 62 66 68 71 75 84 78 77 74 1968 64 83 73 77 70 74 74 76 74 77 85 81 76 1969 86 87 89 75 75 72 75 77 82 87 79 81 80 1970 81 75 80 71 74 70 65 76 81 85 84 83 77 1971 79 77 81 75 71 64 62 64 70 75 78 73 72 1972 82 78 82 71 75 70 *** 70 78 83 76 80 *** 1973 77 67 75 72 *** 75 70 77 85 80 75 77 *** 1974 84 80 76 70 74 69 77 77 72 74 80 72 75 1975 75 77 77 67 77 74 61 71 75 83 *** 74 *** 1976 65 *** 72 71 76 72 72 73 82 79 72 81 *** 1977 *** 75 79 71 73 74 72 74 79 85 80 78 *** 1978 75 80 78 76 79 77 72 74 74 78 78 74 76 1979 72 75 76 80 71 72 69 65 76 79 81 78 75 1980 *** *** 80 77 75 68 62 75 83 86 87 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 81 77 81 77 81 78 76 83 76 85 85 77 80 1983 *** 71 70 73 75 79 71 79 83 81 75 83 *** 1984 82 85 84 83 76 74 72 82 78 76 83 83 80 1985 84 74 85 77 75 73 76 71 80 85 85 86 79 1986 78 81 83 76 77 71 74 74 76 81 85 78 78 1987 76 80 82 78 76 68 73 77 81 84 79 81 78 1988 84 81 75 77 77 72 76 78 80 78 76 78 78 1989 78 80 75 76 74 70 72 75 75 74 75 75 75 1990 78 75 74 74 75 73 74 77 79 78 78 79 76 1991 77 77 75 76 72 71 71 74 76 76 76 77 75 1992 75 70 72 72 69 64 69 71 73 71 71 72 71 1993 71 70 68 72 72 70 71 70 76 81 83 80 74 1994 78 79 75 76 75 74 72 80 80 81 84 85 78 1995 84 84 83 77 75 70 71 82 86 88 76 78 80 1996 89 85 87 82 76 78 74 75 82 83 86 80 81 1997 83 83 82 72 77 84 84 80 89 87 88 86 83 1998 88 85 77 80 85 72 74 76 87 84 88 88 82 1999 81 71 84 79 81 72 74 79 83 84 83 81 79 2000 80 82 78 77 82 74 69 74 85 88 88 85 80 2001 86 78 79 82 82 72 72 77 85 86 83 84 81 2002 83 76 77 86 81 70 69 76 77 84 84 87 79 2003 79 83 87 80 73 78 74 76 83 81 85 78 80 MEAN 79 78 79 76 76 72 72 75 80 82 80 79 77 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 31 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 90 94 94 92 90 86 78 89 94 94 86 87 90 1965 89 86 91 91 86 85 88 89 90 94 82 82 88 1966 86 91 91 88 91 72 92 89 94 95 86 93 89 1967 88 91 90 81 82 78 81 86 86 94 88 89 86 1968 75 95 88 89 83 88 87 89 87 87 94 91 88 1969 93 94 95 87 87 87 87 88 92 94 91 89 90 1970 91 90 92 87 89 85 81 87 92 93 93 91 89 1971 90 90 91 87 84 76 74 77 84 85 87 81 84 1972 91 86 90 84 85 82 *** 82 89 93 87 88 *** 1973 88 80 86 84 *** 85 80 86 93 89 85 90 *** 1974 93 92 84 81 82 81 87 85 85 92 90 84 86 1975 89 88 89 83 87 86 72 83 86 92 *** 85 *** 1976 79 *** 83 82 84 82 85 86 91 89 83 85 *** 1977 *** 83 86 86 86 88 84 89 91 93 92 88 *** 1978 85 88 87 90 90 90 88 88 88 87 86 86 88 1979 82 83 89 90 83 85 84 84 92 90 90 86 87 1980 *** *** 88 85 87 80 77 87 92 92 91 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 91 88 92 87 91 90 87 92 92 95 92 87 90 1983 *** 85 84 86 89 90 84 89 93 92 86 92 *** 1984 91 94 93 94 86 84 84 90 92 89 92 91 90 1985 93 88 94 87 88 85 84 86 91 95 95 93 90 1986 89 89 92 87 90 84 89 90 90 92 93 89 90 1987 87 90 91 88 88 84 88 89 91 93 89 91 89 1988 92 89 83 87 87 85 87 89 89 86 85 85 87 1989 85 89 82 82 79 80 83 83 82 82 83 81 83 1990 85 82 82 81 80 81 81 83 84 82 83 84 82 1991 84 83 80 82 79 79 81 81 81 83 82 84 82 1992 85 78 81 78 77 75 77 80 80 79 81 79 79 1993 77 80 76 81 81 76 78 77 82 93 91 88 82 1994 87 88 80 82 81 80 83 89 91 91 94 93 87 1995 95 96 95 89 89 84 83 95 97 97 91 92 92 1996 97 94 95 93 87 89 85 90 93 94 96 92 92 1997 96 93 93 87 92 94 94 92 97 96 97 97 94 1998 96 96 94 92 94 84 87 90 94 94 96 96 93 1999 94 86 94 94 92 85 87 92 93 94 95 93 92 2000 92 93 90 93 89 86 83 88 94 96 96 94 91 2001 95 90 91 94 92 86 84 90 96 96 95 94 92 2002 95 90 93 94 92 86 86 90 94 96 95 95 92 2003 92 91 95 91 94 93 89 93 95 96 95 90 93 MEAN 89 89 89 87 87 84 84 87 90 91 90 89 88 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 32 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 58 71 79 72 65 62 59 67 74 73 63 66 67 1965 75 58 73 72 64 59 61 67 70 80 47 52 65 1966 51 68 62 62 66 59 59 64 72 75 62 51 63 1967 58 71 68 65 45 55 58 58 62 74 68 67 62 1968 53 74 60 67 55 57 62 66 62 66 78 72 64 1969 77 80 84 65 65 56 64 66 73 78 68 73 71 1970 72 62 69 58 59 57 54 66 70 77 74 74 66 1971 69 65 71 65 58 54 52 52 56 65 69 64 62 1972 74 68 74 59 64 59 *** 59 68 74 65 70 *** 1973 67 56 66 62 *** 67 60 68 77 71 67 65 *** 1974 76 69 67 59 68 59 67 68 56 53 70 59 64 1975 60 67 66 52 66 59 49 58 64 75 *** 65 *** 1976 53 *** 58 62 68 64 61 61 73 68 62 78 *** 1977 *** 68 71 55 64 61 62 61 67 79 72 70 *** 1978 68 73 72 67 71 67 61 64 62 70 71 63 67 1979 63 68 66 72 60 63 59 53 65 70 73 72 65 1980 *** *** 74 69 68 61 53 66 74 80 83 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 69 62 69 65 73 68 66 73 63 75 77 65 69 1983 *** 56 60 58 62 69 60 70 74 69 63 73 *** 1984 73 75 76 73 66 65 59 75 67 66 74 75 70 1985 73 60 76 67 64 63 69 59 70 76 77 78 69 1986 66 73 75 67 67 60 64 62 66 73 77 68 68 1987 66 71 73 69 65 55 62 67 73 75 69 70 68 1988 77 73 66 69 68 61 65 67 72 71 67 70 69 1989 70 71 69 71 68 60 62 66 68 65 65 67 67 1990 70 68 68 67 68 64 66 70 71 74 72 74 69 1991 71 71 70 69 65 63 63 69 71 70 69 71 69 1992 67 62 66 66 62 56 62 64 67 64 63 66 64 1993 64 61 59 63 62 64 64 61 69 68 75 72 65 1994 69 70 69 69 69 69 61 69 66 69 74 74 69 1995 71 72 71 65 61 58 59 69 74 77 61 64 67 1996 80 75 79 71 64 67 62 62 70 71 74 67 70 1997 69 73 68 56 62 75 75 67 80 76 76 73 71 1998 79 73 57 66 75 59 62 62 78 70 77 80 70 1999 66 56 73 64 69 59 62 65 70 69 69 66 66 2000 65 70 66 61 75 61 55 59 75 80 79 73 68 2001 75 64 65 69 69 59 61 61 71 76 69 73 68 2002 70 59 62 77 70 58 54 63 62 71 72 79 66 2003 68 75 79 71 57 66 62 62 73 66 74 65 68 MEAN 68 68 69 66 65 61 61 64 69 72 70 69 67 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 33 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. NO. OF DAYS PRECIPITATION EQUAL OR MORE THAN 5 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 5 7 10 13 1 1 0 5 6 5 4 4 61 1965 9 1 9 7 3 2 6 2 9 16 5 4 73 1966 4 4 6 5 5 2 1 6 9 13 6 7 68 1967 4 10 8 5 2 2 1 1 13 8 7 6 67 1968 4 7 7 8 4 3 4 4 7 9 9 9 75 1969 12 13 10 8 5 3 6 2 11 13 9 7 99 1970 8 3 9 2 3 1 3 6 6 7 7 8 63 1971 6 8 6 11 1 2 0 1 1 5 2 11 54 1972 15 10 11 1 3 3 1 1 4 6 10 10 75 1973 7 3 8 2 *** 3 0 7 11 5 7 9 *** 1974 13 8 14 8 1 4 9 8 5 0 11 4 85 1975 4 8 4 2 4 2 0 4 11 9 *** 8 *** 1976 4 *** 9 1 4 3 6 0 9 11 6 10 *** 1977 12 1 4 2 4 2 0 5 7 12 7 10 66 1978 6 7 4 3 5 3 0 2 2 8 12 6 58 1979 11 8 5 5 3 2 4 1 6 9 6 5 65 1980 *** *** 8 3 1 0 0 5 4 7 3 *** *** 1981 *** *** *** *** *** *** *** *** *** *** *** *** *** 1982 8 11 8 1 4 3 0 7 3 14 11 3 73 1983 *** 1 6 3 3 5 3 7 8 7 7 8 *** 1984 7 10 5 2 5 1 0 8 2 5 10 12 67 1985 7 7 12 1 1 1 6 2 5 8 10 10 70 1986 2 8 10 1 3 4 3 2 4 10 12 9 68 1987 3 6 5 7 1 0 3 2 8 12 6 6 59 1988 9 4 4 3 3 3 3 9 13 8 9 4 72 1989 14 8 9 2 1 0 1 3 8 11 5 14 76 1990 11 7 6 5 2 0 2 4 3 12 4 13 69 1991 8 7 7 2 4 0 4 1 8 7 11 7 66 1992 8 10 9 9 4 3 4 4 9 9 6 9 84 1993 13 10 8 3 4 9 5 3 9 10 20 7 101 1994 4 11 6 5 6 10 0 2 2 11 8 8 73 1995 6 4 4 3 1 4 1 4 5 10 1 5 48 1996 6 7 9 7 1 6 2 2 8 8 7 2 65 1997 6 9 8 1 1 5 9 0 16 5 5 5 70 1998 7 6 1 2 4 1 4 3 11 6 9 6 60 1999 4 1 2 7 8 0 3 4 8 9 9 4 59 2000 12 7 10 1 4 2 0 3 6 14 12 9 80 2001 8 2 6 2 2 0 3 4 8 11 8 4 58 2002 6 5 3 11 6 0 2 4 2 5 8 14 66 2003 4 9 10 5 3 3 1 4 10 3 11 9 72 MEAN 7 7 7 4 3 3 3 4 7 9 8 8 70 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 34 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. HIGHEST AND LOWEST LIMITS FOR 40 YEARS DURING 1964-2003 ELE- JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MENT --------------------------------------------------------------------------------------------- NO. HIG. DRY 03 23.2 17.8 24.4 26.0 25.5 30.6 31.4 28.6 31.0 27.0 26.0 21.4 1 YEAR - DAY 2002- 2 1999- 8 2002-27 1977-13 1980- 4 1966-12 1965-16 1987- 3 1967- 5 1971-24 1976-26 1965-14 LOW. DRY 03 -3.6 -4.8 -2.0 2.2 4.8 9.0 14.2 15.0 7.0 5.5 1.0 -2.6 2 YEAR - DAY 1964-11 1993-18 1976- 2 1969- 3 2003- 2 1978- 2 1992- 3 1974-14 1974-27 1977-23 2002-30 1994- 7 HIG. WET 03 16.2 13.6 15.4 21.0 22.0 25.0 26.0 26.4 25.4 24.0 21.0 16.8 3 YEAR - DAY 1966-25 1966-18 2002-27 1977-14 1975-30 1966- 6 1996-19 1999-13 1964-18 1996-25 1973- 1 1990- 4 LOW. WET 03 -4.8 -5.2 -4.0 2.0 4.4 8.5 11.0 13.0 5.0 5.0 0.9 -3.2 4 YEAR - DAY 1972-25 1993-18 1976- 2 1969- 3 2003- 2 1978- 2 1974- 7 1974-14 1974-27 1977-23 2002-30 1994- 7 HIG. DRY 09 29.0 29.2 32.2 34.2 34.8 36.0 35.0 36.0 34.8 34.0 31.4 28.4 5 YEAR - DAY 1979- 4 1996- 9 1988- 4 1986-15 1987-23 1980- 4 1965-16 1971-26 1996- 8 1996-25 1964-21 1965-14 LOW. DRY 09 -3.0 -0.8 -2.0 4.0 9.6 11.4 17.0 17.0 14.0 6.5 3.6 -2.0 6 YEAR - DAY 1969- 6 1972- 8 1976- 1 1971- 2 1988- 2 1967- 5 1974- 7 1975-19 1974- 7 1977-22 2001-18 1972-22 HIG. WET 09 22.4 20.8 23.8 30.4 27.8 28.0 29.8 30.0 29.4 29.0 25.0 24.2 7 YEAR - DAY 1993-28 1987-25 1994-29 1965-28 1998-21 1980- 4 1965-15 1972- 9 1969-19 1967- 8 1978- 2 1990-14 LOW. WET 09 -3.0 -1.0 -3.0 3.0 7.0 11.2 13.6 13.2 10.0 6.0 3.6 -2.0 8 YEAR - DAY 1969- 6 1972-21 1976- 1 1974- 1 1980-16 1967- 5 1992-11 1993-22 1974-27 1977-22 2001-18 1972-22 HIG. DRY 15 28.0 25.6 25.2 30.0 29.0 36.2 34.0 37.2 35.0 33.5 29.5 24.2 9 YEAR - DAY 1979- 4 1996- 9 1970-29 1977-13 1966-25 1984-28 1980- 6 1983-10 1978-10 1974-26 1972- 7 1990- 7 LOW. DRY 15 -3.0 -4.0 -2.0 4.0 7.8 10.0 15.6 16.0 12.0 6.0 2.6 -1.0 10 YEAR - DAY 1969- 6 1972- 8 1985- 8 1971- 2 1988- 2 1967- 5 1992-11 1975-18 1973-26 1977-22 2001-18 1972-22 HIG. WET 15 20.4 20.2 21.6 23.2 24.0 26.8 29.4 28.4 27.0 26.0 26.0 22.2 11 YEAR - DAY 1993-28 1987-25 1994-29 1994-23 1966-26 1995-29 1966-29 1966-25 1969-25 1974-29 1978- 3 1990- 9 LOW. WET 15 -3.0 -4.0 -2.0 3.8 6.0 9.2 12.8 14.0 6.0 5.4 2.4 -2.0 12 YEAR - DAY 1969- 6 1972- 8 1976-10 1971- 2 1980-16 1967- 5 1992-11 1977-29 1974-28 1987-27 2001-18 1972-21 HIG. MIN. 14.5 12.0 13.2 18.4 20.2 23.6 25.5 25.6 25.2 21.2 18.2 16.0 13 YEAR - DAY 1976- 6 1999-19 2002-27 2000- 8 1971-27 1997-30 1980-31 2000- 4 1998- 2 2002- 1 1995- 4 1990- 5 LOW. MIN. -8.0 -9.0 -6.0 0.0 2.0 8.0 5.0 8.0 5.0 2.0 0.0 -5.0 14 YEAR - DAY 1973-24 1972-10 1985-11 1974-11 1974- 2 1965- 1 1965-24 1965- 5 1965-30 1974-27 1972-29 1972-28 HIG. MAX. 30.0 30.0 34.5 36.5 37.5 37.0 38.5 37.0 39.5 35.5 32.5 31.0 15 YEAR - DAY 1979- 4 1973-19 1988- 4 1986-15 1987-23 1980- 4 1994- 9 1971-26 1996-30 1996-25 1979- 3 1965-15 LOW. MAX. 1.0 0.0 1.5 6.5 10.5 16.0 18.5 19.0 15.5 9.5 5.5 2.0 16 YEAR - DAY 1969- 5 1996- 2 1985- 4 1987- 5 1988- 2 1968- 8 1992-11 1975-19 1997-15 1987-27 1982-10 1986-10 HIG. PPTN 61.0 64.5 103.0 90.4 58.0 137.0 79.0 100.0 148.0 204.0 117.5 181.0 17 YEAR - DAY 1994- 5 1989-13 1967-29 1996-26 1977-21 1977-27 1974- 6 1988- 4 1969-11 1985-11 2000- 6 1979-16 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 35 STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. HIGHEST LIMITS OF ABSOLUTE DIFFERENCES FOR 40 YEARS DURING 1964-2003 ELE- JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MENT --------------------------------------------------------------------------------------------- NO. DRY 09 - DRY 03 18.0 19.8 18.5 18.4 17.2 13.8 13.4 14.0 18.4 15.8 21.0 16.2 18 YEAR - DAY 1976-29 1994- 4 1970-17 1990-11 2003- 5 2000-14 1998-26 1978-29 1996-30 2003-24 1978- 3 1995-25 DRY 15 - DRY 09 16.0 19.0 18.0 13.4 10.0 13.0 12.0 11.6 11.5 12.0 12.0 15.0 19 YEAR - DAY 1964-18 1973-19 1973-20 1965-28 1970- 6 1969- 4 1974- 4 1971-26 1980-10 1996-25 1972-10 1973- 6 DRY 15 - DRY 03 17.4 16.8 14.8 17.2 13.6 13.0 11.8 14.0 12.6 19.5 22.0 19.0 20 YEAR - DAY 2003-30 1970- 4 1965-31 2003- 2 2003- 9 1984-28 2003-31 1983-10 2002-10 1974-26 1978- 3 2001-26 WET 09 - WET 03 14.0 17.2 12.0 16.6 14.0 11.0 9.6 10.0 11.6 12.2 21.0 12.4 21 YEAR - DAY 2000-25 1994- 4 1968- 6 1965-28 1989-19 1991-13 1966- 1 1993-11 1969-19 1967- 8 1978- 3 1993-21 WET 15 - WET 09 10.6 11.2 11.0 13.6 9.2 11.6 7.4 9.2 12.0 12.5 8.0 10.2 22 YEAR - DAY 1985-21 1968-13 1973-20 1965-28 1967-22 1988- 9 1965- 3 1988-11 1980-10 1974-29 1978-27 1966-23 WET 15 - WET 03 11.2 15.6 12.0 15.0 12.2 10.4 9.0 8.0 11.0 14.0 23.0 12.0 23 YEAR - DAY 1991-12 1994- 4 1968-13 1990-11 1989-19 1991- 3 1992-23 2003- 1 1980- 9 1974-27 1978- 3 1976- 4 DAY BY DAY DRY 03 18.0 17.0 15.4 15.0 10.0 9.0 7.0 5.6 8.4 12.5 15.0 14.6 24 YEAR - DAY 1968-13 1971-10 1988- 4 1978- 6 1980- 4 1967- 5 2003-31 1966- 5 1967- 7 1974-29 1976-27 2003-16 DAY BY DAY WET 03 11.0 9.2 9.0 11.0 7.0 7.6 6.0 6.0 8.6 9.0 9.2 10.1 25 YEAR - DAY 1987-11 1968-27 1988- 4 1977-15 1974- 4 1966- 5 1974- 7 1973-28 1964-19 1996-25 1995-12 1971-15 DAY BY DAY DRY 09 17.0 20.6 20.2 19.0 13.6 11.4 12.6 10.6 11.4 17.4 15.0 18.0 26 YEAR - DAY 1979- 5 1996- 2 1968-14 1986-16 1989-11 1984-11 1974- 5 1982-18 2001- 1 2002-22 1972-28 1971-15 DAY BY DAY WET 09 11.2 13.0 11.0 14.6 11.4 12.8 10.2 10.8 10.6 11.0 11.4 11.4 27 YEAR - DAY 1993-28 1987-26 1971-12 1965-29 1989-19 1969-13 1994- 1 1993- 3 1994- 5 1976-18 2001-18 1971-15 DAY BY DAY DRY 15 20.0 17.0 14.0 15.0 11.4 17.0 9.0 9.4 12.6 13.8 18.9 16.4 28 YEAR - DAY 1979- 5 1996-10 1998-26 1986-16 1965-17 1967- 5 1966- 7 1983-10 1969-26 2002-22 1972- 8 1971-15 DAY BY DAY WET 15 10.2 14.8 13.0 10.2 14.0 12.0 9.0 9.4 11.2 11.5 11.0 10.0 29 YEAR - DAY 1993-28 1987-26 1968-14 1987-25 1980-16 1972-11 1992-23 1988-20 1969-26 1977- 7 2001-18 1976- 4 DAY BY DAY MIN. 14.4 9.8 7.0 9.0 8.5 7.0 9.5 9.0 6.5 11.0 10.0 9.4 30 YEAR - DAY 2000-22 1996- 7 1974-16 1967-28 1976-17 1974-26 1966-29 1994- 4 1994-26 1974-28 1995-12 2003-16 DAY BY DAY MAX. 16.5 24.0 19.0 16.0 13.6 12.0 9.5 10.0 13.5 14.0 15.0 16.0 31 YEAR - DAY 1979- 6 1996- 2 1970-19 1971- 2 2000- 4 1967- 5 1986- 1 1972- 2 1996-30 1976- 5 1970-10 1971-15 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 4.1 6.6 8.4 13.1 17.3 ***** ***** ***** ***** 16.2 15.8 7.4 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -1.0 1.7 4.7 7.1 9.0 ***** ***** ***** ***** 8.3 7.8 2.8 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 9.1 11.6 12.3 18.9 25.6 30.7 30.8 30.5 27.6 24.0 23.8 13.0 21.5 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.1 9.9 7.6 11.8 16.6 ***** ***** ***** ***** 15.7 16.0 10.2 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.21 4.63 5.87 6.74 10.32 13.65 12.81 14.00 13.32 9.50 7.01 4.85 8.83 MEAN OF MIXING RATIO AT 09 GMT. 3.47 5.07 6.73 7.93 12.10 15.23 15.67 15.53 14.05 10.88 8.46 5.38 10.04 MEAN OF MIXING RATIO AT 15 GMT. 4.06 5.42 6.41 7.30 11.13 14.85 15.22 14.88 13.62 10.33 7.67 5.20 9.67 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -4.0 -5.0 2.0 4.0 3.0 ***** ***** ***** ***** 6.0 2.0 -1.4 ****** DAY 11 4 2 5 3 ** ** ** ** 27 29 30 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 19.0 17.0 22.0 27.0 29.0 33.0 33.0 33.0 30.0 27.0 32.0 21.0 33.0 DAY 17 2 26 26 9 3 18 4 3 1 21 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 17.0 27.0 29.0 37.0 12.0 7.0 0.0 41.0 37.0 35.0 33.0 27.0 41.0 DAY 1 26 7 11 1 17 ** 6 15 28 27 25 MONTHLY TOTAL PRECIPITATION IN MM. 58.4 93.0 111.0 224.0 12.0 10.0 0.0 80.0 101.0 80.5 86.0 58.0 913.9 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 28.7 26.9 19.8 24.6 NO. OF DAYS WITH PRECIPITATION. 6 9 10 13 1 2 0 8 8 7 5 10 79 NO. OF DAYS PRECIPITATION EQUAL 6 9 10 13 1 2 0 8 8 7 5 9 78 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 5 4 9 1 0 0 2 4 2 3 1 34 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 85 91 91 91 89 85 69 88 92 93 80 85 87 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 62 72 83 74 67 63 64 69 76 74 70 69 70 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 80 85 87 81 76 74 73 78 86 84 76 78 80 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 5 1 0 0 0 *** *** *** *** 0 0 0 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 *** *** *** *** 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 19 25 25 1 0 5 0 75 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 27 2 0 0 0 *** *** *** *** 0 0 5 *** DATE OF START AND END FREEZING START = 26 DEC. END = 4 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 6.4 9.1 8.1 11.2 15.8 19.4 20.3 19.9 18.0 15.3 13.4 12.0 14.1 AVERAGE OF MINIMUM TEMPERATURE IN C. 1.0 2.5 3.4 3.9 6.7 9.1 9.8 9.6 9.2 10.7 7.4 4.7 6.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 11.8 15.6 12.9 18.5 24.9 29.7 30.7 30.2 26.9 19.8 19.3 19.3 21.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.8 13.1 9.5 14.6 18.2 20.6 20.9 20.6 17.7 9.1 11.9 14.6 15.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.25 4.01 5.38 6.77 9.31 12.89 13.13 15.23 11.96 9.47 5.08 6.11 8.63 MEAN OF MIXING RATIO AT 09 GMT. 4.94 5.90 6.39 8.33 11.35 14.07 16.75 16.89 13.78 10.59 8.23 6.34 10.30 MEAN OF MIXING RATIO AT 15 GMT. 4.84 5.28 5.79 7.12 9.80 13.48 16.12 15.82 13.36 10.35 8.35 6.96 9.77 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -0.4 -0.2 0.0 2.0 3.2 8.0 5.0 8.0 5.0 4.5 5.2 1.0 -0.4 DAY 1 2 12 9 4 1 24 5 30 2 5 27 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 16.0 23.2 25.0 33.2 31.0 34.0 36.0 34.0 33.0 27.0 32.0 31.0 36.0 DAY 3 6 31 28 16 8 16 4 2 7 16 15 24 HOUR MAXIMUM PRECIPITATION IN MM. 20.5 22.0 31.0 12.0 20.0 21.2 25.0 17.0 47.0 77.4 18.5 27.0 77.4 DAY 29 13 2 9 4 25 23 8 19 14 8 29 MONTHLY TOTAL PRECIPITATION IN MM. 123.6 29.0 165.3 64.5 41.0 32.8 75.4 27.5 175.5 460.2 60.5 85.0 1340.3 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 23.7 10.3 20.8 45.2 NO. OF DAYS WITH PRECIPITATION. 14 3 10 10 5 5 8 2 10 20 8 7 102 NO. OF DAYS PRECIPITATION EQUAL 14 3 10 10 5 4 8 2 10 20 8 7 101 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 7 1 7 1 1 1 3 2 5 12 2 4 46 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 85 72 88 90 84 84 65 89 86 93 50 72 80 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 81 72 78 76 68 61 68 69 73 82 69 57 71 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 83 75 80 79 71 71 87 77 83 88 79 74 79 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 2 4 18 19 23 7 0 2 1 76 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 11 3 1 0 0 0 0 0 0 0 0 0 15 DATE OF START AND END FREEZING START = 1 JAN. END = 12 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 12.8 9.8 ***** 15.0 18.1 23.3 25.0 26.8 21.8 17.6 15.0 12.5 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. 4.5 4.2 ***** 8.8 12.5 17.5 18.1 21.7 17.9 13.5 10.8 7.8 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 21.1 15.5 ***** 21.2 23.7 29.2 31.9 31.9 25.8 21.6 19.3 17.2 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 16.6 11.3 ***** 12.4 11.2 11.7 13.8 10.2 7.9 8.1 8.5 9.4 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 6.06 5.33 6.21 7.88 9.64 13.64 14.50 16.68 13.43 10.17 7.16 4.86 9.63 MEAN OF MIXING RATIO AT 09 GMT. 6.98 6.78 6.37 8.10 11.42 14.25 16.75 17.94 13.93 11.27 9.26 7.63 10.89 MEAN OF MIXING RATIO AT 15 GMT. 6.00 6.75 6.78 8.37 10.95 13.63 17.18 17.70 13.53 10.58 8.93 6.82 10.60 ABSOLUTE OF MINIMUM TEMPERATURE IN C. 2.0 1.0 ***** 5.0 7.0 12.4 12.4 19.2 15.0 10.1 6.8 3.4 ****** DAY 29 7 ** 5 8 22 8 7 29 20 30 23 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 28.5 21.0 ***** 29.0 29.2 35.0 36.2 35.0 31.0 25.0 24.2 25.0 ****** DAY 6 11 ** 18 27 6 27 2 10 6 1 17 24 HOUR MAXIMUM PRECIPITATION IN MM. 26.0 16.0 78.0 50.0 19.5 5.7 5.4 45.4 83.0 52.0 48.0 28.0 83.0 DAY 11 6 1 24 5 14 17 6 21 1 7 29 MONTHLY TOTAL PRECIPITATION IN MM. 77.0 53.8 160.0 134.1 80.7 16.7 9.4 147.4 268.0 315.0 134.2 77.0 1473.3 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 19.7 15.7 28.8 35.7 NO. OF DAYS WITH PRECIPITATION. 7 8 12 9 6 5 2 7 15 16 7 9 103 NO. OF DAYS PRECIPITATION EQUAL 7 8 12 9 6 5 2 7 15 16 7 9 103 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 2 3 3 4 0 0 4 8 10 4 1 42 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 83 79 83 83 90 69 81 89 94 94 70 52 81 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 65 76 72 67 70 62 63 65 74 79 73 73 70 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 64 85 79 76 77 69 85 77 81 83 79 92 79 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 *** 0 0 0 0 0 0 0 0 0 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 *** 0 0 2 5 24 1 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 *** 0 0 0 0 0 0 0 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 *** 0 0 12 24 25 3 0 0 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 *** 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 *** 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 0 0 *** 0 0 0 0 0 0 0 0 0 *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 10.0 5.8 8.6 12.2 20.4 22.0 24.3 26.2 21.4 18.7 15.1 11.1 16.3 AVERAGE OF MINIMUM TEMPERATURE IN C. 4.3 2.1 3.3 6.0 14.5 16.7 19.5 20.9 17.5 14.3 11.3 5.9 11.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. 15.8 9.5 14.0 18.3 26.3 27.3 29.0 31.5 25.2 23.0 19.0 16.2 21.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.5 7.4 10.7 12.3 11.8 10.6 9.5 10.6 7.7 8.7 7.7 10.3 9.9 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 5.14 4.22 5.14 6.59 10.08 10.94 13.52 14.76 10.43 10.00 7.72 5.42 8.66 MEAN OF MIXING RATIO AT 09 GMT. 5.76 5.02 5.94 7.92 11.14 12.19 13.60 15.94 13.17 12.48 9.10 6.86 9.93 MEAN OF MIXING RATIO AT 15 GMT. 5.27 4.42 5.72 6.92 7.08 11.18 12.83 14.92 12.83 10.98 8.37 6.27 8.90 ABSOLUTE OF MINIMUM TEMPERATURE IN C. 1.0 0.0 0.0 1.0 10.4 10.4 17.0 17.2 14.0 9.0 3.2 0.0 0.0 DAY 23 7 29 2 6 5 3 23 23 25 29 24 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 27.0 17.0 23.0 28.0 32.0 34.0 32.0 34.0 31.2 30.0 25.0 24.0 34.0 DAY 15 23 4 20 27 3 10 3 5 8 22 7 24 HOUR MAXIMUM PRECIPITATION IN MM. 22.0 32.0 103.0 12.0 24.0 68.0 9.0 15.0 47.0 82.0 61.0 42.0 103.0 DAY 22 27 29 8 18 5 21 13 11 13 16 23 MONTHLY TOTAL PRECIPITATION IN MM. 65.1 157.8 241.0 51.0 46.0 74.0 12.0 17.0 193.0 216.0 145.0 117.0 1334.9 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 34.8 12.8 16.6 35.8 NO. OF DAYS WITH PRECIPITATION. 7 14 13 6 4 2 2 2 16 9 13 8 96 NO. OF DAYS PRECIPITATION EQUAL 7 14 13 6 4 2 2 2 16 9 13 8 96 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 7 5 3 2 1 0 1 5 6 4 5 42 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 86 85 85 78 81 73 80 84 70 92 82 86 82 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 63 80 73 68 59 62 59 61 75 78 75 70 69 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 66 80 77 72 47 63 65 67 81 82 78 75 71 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 3 5 22 2 0 0 0 32 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 6 7 13 27 5 2 0 0 60 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 0 5 1 0 0 0 0 0 0 0 0 3 9 DATE OF START AND END FREEZING START = 24 DEC. END = 29 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 9.7 ***** 9.5 12.9 20.6 21.7 25.1 25.4 23.3 19.8 14.3 10.0 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. 4.1 ***** 4.6 8.4 14.8 17.1 20.3 20.9 17.7 15.2 10.2 5.6 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 15.3 12.7 14.5 17.4 26.3 26.3 30.0 29.9 28.9 24.4 18.3 14.5 21.5 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.2 ***** 9.9 9.0 11.5 9.2 9.7 9.0 11.2 9.2 8.1 8.9 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.24 4.89 4.52 6.50 9.95 11.73 14.21 15.02 12.58 9.62 7.94 5.60 8.90 MEAN OF MIXING RATIO AT 09 GMT. 4.83 6.02 5.97 7.32 10.69 11.07 15.27 15.48 14.24 13.02 9.04 6.25 9.93 MEAN OF MIXING RATIO AT 15 GMT. 4.58 5.17 5.33 7.14 10.42 13.28 14.82 14.75 13.49 11.99 8.24 5.77 9.58 ABSOLUTE OF MINIMUM TEMPERATURE IN C. 0.0 ***** 0.0 3.0 11.0 11.0 16.0 18.2 15.0 7.6 5.1 3.0 ****** DAY 17 ** 22 4 31 8 13 19 8 28 19 13 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 28.0 24.0 30.0 25.0 32.0 30.0 35.0 34.0 32.0 30.0 22.0 29.0 35.0 DAY 13 20 13 14 20 15 20 16 2 4 28 11 24 HOUR MAXIMUM PRECIPITATION IN MM. 21.0 38.0 76.0 41.0 13.0 52.0 47.0 6.0 30.0 88.0 43.0 29.0 88.0 DAY 25 4 22 25 31 7 12 2 16 27 17 7 MONTHLY TOTAL PRECIPITATION IN MM. 60.1 144.0 164.0 174.8 47.0 69.5 81.0 28.5 87.0 204.0 215.5 133.0 1408.4 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 26.1 20.7 14.0 39.2 NO. OF DAYS WITH PRECIPITATION. 7 7 9 12 9 3 5 7 7 11 13 11 101 NO. OF DAYS PRECIPITATION EQUAL 7 7 9 12 9 3 5 7 7 11 13 11 101 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 7 5 6 1 1 3 0 3 6 7 6 48 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 70 92 80 88 82 85 87 88 87 68 93 89 84 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 58 77 69 68 57 57 62 67 64 77 80 75 68 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 65 81 71 76 70 81 72 74 72 85 83 79 76 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** 0 0 0 0 0 0 0 0 0 0 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** 0 0 0 5 16 17 2 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 1 0 4 6 18 21 20 1 0 0 71 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 3 *** 1 0 0 0 0 0 0 0 0 0 *** DATE OF START AND END FREEZING START = 17 JAN. END = 22 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 5.2 3.6 6.6 12.0 17.8 23.6 22.0 23.9 21.2 18.0 11.5 10.9 14.7 AVERAGE OF MINIMUM TEMPERATURE IN C. 1.9 0.8 4.1 7.3 12.5 17.1 15.2 18.2 15.1 12.6 6.1 5.8 9.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.4 6.5 9.2 16.7 23.0 30.0 28.7 29.6 27.2 23.4 17.0 16.1 19.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.5 5.7 5.1 9.4 10.5 12.9 13.5 11.4 12.1 10.8 10.9 10.3 9.9 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.06 3.82 5.11 5.94 8.94 12.65 12.86 13.83 11.68 9.49 6.16 5.99 8.38 MEAN OF MIXING RATIO AT 09 GMT. 4.61 4.22 5.60 6.79 10.25 13.82 14.10 15.75 13.78 11.32 7.32 7.40 9.58 MEAN OF MIXING RATIO AT 15 GMT. 4.18 4.05 5.20 6.64 9.81 13.00 13.49 15.25 13.29 10.72 6.66 6.53 9.07 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -3.0 -1.0 0.0 2.0 8.0 12.2 12.0 14.0 12.0 6.0 2.2 2.0 -3.0 DAY 6 5 23 3 7 4 15 4 13 30 19 30 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.0 12.0 14.0 28.0 35.0 34.0 36.0 32.0 34.0 27.0 24.0 25.0 36.0 DAY 1 2 31 17 23 10 13 20 6 5 8 18 24 HOUR MAXIMUM PRECIPITATION IN MM. 29.0 49.0 21.0 30.0 13.0 39.0 24.0 18.0 148.0 58.0 22.8 17.0 148.0 DAY 6 21 22 3 20 15 5 9 11 26 9 15 MONTHLY TOTAL PRECIPITATION IN MM. 194.2 238.5 155.4 115.8 55.0 90.0 104.0 25.0 423.0 247.0 131.8 80.3 1860.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 31.6 14.0 29.7 24.7 NO. OF DAYS WITH PRECIPITATION. 20 17 17 11 7 4 11 3 12 19 9 10 140 NO. OF DAYS PRECIPITATION EQUAL 20 17 17 11 7 4 11 3 12 19 9 10 140 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 7 9 7 5 2 3 4 1 10 8 7 4 67 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 87 90 94 83 84 83 85 87 90 91 90 86 88 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 83 83 87 68 67 61 67 67 74 80 71 79 74 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 87 87 88 76 76 73 73 76 83 89 76 78 80 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 1 0 1 0 0 0 0 2 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 2 19 12 17 10 0 0 0 60 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 12 15 2 0 0 0 0 0 0 0 0 0 29 DATE OF START AND END FREEZING START = 5 JAN. END = 24 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 8.0 10.9 11.0 15.1 20.7 22.5 25.3 25.2 21.5 18.1 15.4 10.2 17.0 AVERAGE OF MINIMUM TEMPERATURE IN C. 3.5 5.2 6.3 9.0 14.8 17.5 19.8 20.4 17.4 13.7 10.9 5.5 12.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.6 16.7 15.7 21.2 26.7 27.6 30.8 30.0 25.6 22.5 19.9 14.8 22.0 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.1 11.5 9.4 12.2 11.9 10.1 11.0 9.6 8.2 8.8 9.0 9.3 10.0 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 5.11 5.53 6.06 7.20 10.65 12.14 13.47 14.84 12.45 9.87 8.09 5.55 9.25 MEAN OF MIXING RATIO AT 09 GMT. 5.87 6.24 6.95 8.37 11.78 11.89 13.75 15.37 13.20 11.43 9.46 6.52 10.07 MEAN OF MIXING RATIO AT 15 GMT. 5.07 5.64 6.26 7.77 11.02 11.46 12.70 14.84 12.48 10.43 9.10 6.39 9.43 ABSOLUTE OF MINIMUM TEMPERATURE IN C. 0.0 1.0 4.0 6.2 9.2 11.0 17.0 16.0 12.0 10.0 8.0 1.6 0.0 DAY 28 7 12 2 8 11 2 31 13 25 1 18 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 19.8 27.2 32.0 28.0 32.0 32.0 36.0 34.0 31.0 31.0 29.0 24.0 36.0 DAY 30 13 17 19 13 30 9 13 8 4 7 2 24 HOUR MAXIMUM PRECIPITATION IN MM. 47.0 8.0 22.0 23.0 22.0 28.0 40.0 24.0 48.0 33.0 32.0 67.0 67.0 DAY 26 13 11 21 7 10 24 31 12 17 13 9 MONTHLY TOTAL PRECIPITATION IN MM. 166.8 26.0 139.0 37.0 37.0 32.0 64.0 105.5 134.2 127.0 150.0 258.0 1276.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 26.0 8.3 23.8 41.9 NO. OF DAYS WITH PRECIPITATION. 11 4 12 4 4 3 4 10 8 10 10 13 93 NO. OF DAYS PRECIPITATION EQUAL 11 4 12 4 4 3 4 10 8 10 10 13 93 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 5 0 7 1 1 1 3 5 4 4 6 7 44 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 89 89 89 85 87 84 79 87 90 91 92 88 88 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 77 66 73 60 63 58 57 67 72 79 76 76 69 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 77 71 79 68 71 68 60 75 82 86 83 85 75 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 2 9 14 0 0 0 0 25 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 2 0 9 6 24 20 5 1 0 0 67 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 1 0 0 0 0 0 0 0 0 0 0 0 1 DATE OF START AND END FREEZING START = 28 JAN. END = 28 JAN. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 7.7 8.1 11.3 13.5 20.8 22.8 26.4 25.5 24.6 18.6 14.9 10.7 17.1 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.4 3.3 6.5 7.9 15.6 16.9 20.4 19.8 18.8 13.6 9.8 5.5 11.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.9 13.0 16.1 19.5 26.1 28.6 32.4 31.1 30.4 23.7 19.9 15.9 22.5 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.5 9.7 9.6 11.6 10.5 11.7 12.0 11.3 11.6 10.1 10.1 10.4 10.8 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.34 4.46 6.05 6.84 10.98 11.32 14.34 13.78 13.87 9.04 7.44 5.14 8.97 MEAN OF MIXING RATIO AT 09 GMT. 5.21 5.48 7.09 7.61 11.24 12.16 15.06 13.49 13.99 10.83 8.84 6.05 9.76 MEAN OF MIXING RATIO AT 15 GMT. 5.30 5.10 6.26 6.95 10.87 11.29 13.82 13.24 13.65 10.45 8.29 5.81 9.25 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -3.0 0.0 5.0 3.0 11.0 14.0 17.0 18.6 15.0 8.0 7.0 1.0 -3.0 DAY 20 2 2 2 1 4 27 15 30 26 19 21 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 20.2 22.0 28.0 30.0 31.0 34.0 36.0 37.0 33.0 29.0 26.0 25.0 37.0 DAY 1 10 11 15 4 14 29 26 4 24 23 8 24 HOUR MAXIMUM PRECIPITATION IN MM. 60.0 26.0 21.0 29.0 5.0 16.0 0.0 6.0 10.5 33.0 27.0 25.0 60.0 DAY 15 8 15 2 12 19 ** 1 30 3 10 20 MONTHLY TOTAL PRECIPITATION IN MM. 160.0 101.0 72.0 159.0 11.0 25.0 0.0 10.0 10.5 118.0 51.0 147.0 864.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 38.5 22.6 2.4 36.6 NO. OF DAYS WITH PRECIPITATION. 8 9 9 13 4 3 0 2 1 9 4 15 77 NO. OF DAYS PRECIPITATION EQUAL 8 9 9 13 4 3 0 2 1 9 4 15 77 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 5 3 3 6 0 1 0 0 1 5 2 8 34 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 87 83 90 84 83 74 72 76 70 78 85 76 80 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 71 72 75 69 59 55 55 53 56 68 71 69 64 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 80 77 76 73 72 63 60 64 83 77 78 74 73 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 15 5 4 0 0 0 24 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 1 4 11 29 22 24 0 0 0 91 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 11 5 0 0 0 0 0 0 0 0 0 0 16 DATE OF START AND END FREEZING START = 15 JAN. END = 16 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 3.8 1.0 6.1 14.3 16.2 21.8 25.3 24.5 23.1 19.8 12.9 5.8 14.5 AVERAGE OF MINIMUM TEMPERATURE IN C. 0.2 -3.8 -0.3 5.8 8.8 14.3 18.7 18.1 17.8 14.9 6.5 0.4 8.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 7.4 5.8 12.6 22.7 23.5 29.2 31.8 30.9 28.5 24.7 19.3 11.2 20.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.2 9.6 12.9 16.9 14.7 14.9 13.1 12.8 10.7 9.8 12.8 10.8 12.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.47 3.03 4.30 7.75 9.93 13.75 15.52 13.89 14.03 12.18 7.15 4.44 9.12 MEAN OF MIXING RATIO AT 09 GMT. 3.87 3.64 5.17 9.19 10.66 14.72 ***** 15.71 14.47 13.61 8.09 5.04 ***** MEAN OF MIXING RATIO AT 15 GMT. 3.83 3.49 4.67 8.44 9.86 13.17 15.80 15.57 14.30 12.44 7.63 4.60 9.48 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -3.6 -9.0 -4.0 1.0 5.0 9.0 15.0 14.0 14.0 7.0 0.0 -5.0 -9.0 DAY 26 10 20 5 10 9 4 1 13 23 29 28 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.0 12.0 24.0 34.0 30.4 34.0 34.0 34.0 32.4 29.2 29.6 15.4 34.0 DAY 4 27 25 28 1 22 5 16 3 6 10 4 24 HOUR MAXIMUM PRECIPITATION IN MM. 44.0 30.0 31.0 18.0 41.0 14.0 16.0 44.0 16.0 31.0 53.0 51.0 53.0 DAY 7 8 19 4 10 7 22 1 7 8 5 23 MONTHLY TOTAL PRECIPITATION IN MM. 251.0 120.0 168.5 21.0 70.0 29.0 20.0 45.0 53.0 132.5 271.0 279.5 1460.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 36.9 8.2 8.1 46.8 NO. OF DAYS WITH PRECIPITATION. 16 11 18 2 5 4 3 2 7 11 11 15 105 NO. OF DAYS PRECIPITATION EQUAL 16 11 18 2 5 4 3 2 7 11 11 15 105 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 11 5 6 1 3 1 1 1 3 5 10 9 56 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 85 80 86 81 82 80 78 77 89 90 85 85 83 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 77 75 79 62 67 65 *** 61 69 79 70 76 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 85 79 80 71 74 65 67 72 77 82 72 78 75 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 18 1 0 0 0 0 0 0 0 0 4 23 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 4 2 3 0 0 0 9 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 2 2 15 28 27 9 0 0 0 83 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 17 27 22 0 0 0 0 0 0 0 1 14 81 DATE OF START AND END FREEZING START = 29 NOV. END = 27 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 3.1 8.7 10.0 15.3 ***** 21.7 22.3 25.2 20.8 18.4 12.7 9.9 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -3.1 1.3 3.7 9.2 ***** 17.3 15.8 21.2 17.2 14.2 7.6 3.5 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 9.3 16.1 16.4 21.4 ***** 26.0 29.3 29.3 24.4 22.6 17.8 16.4 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.4 14.8 12.7 12.2 ***** 8.7 13.5 8.1 7.2 8.4 10.2 12.9 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.54 4.59 5.36 7.30 ***** 13.02 14.64 15.78 12.56 9.92 6.93 4.46 ***** MEAN OF MIXING RATIO AT 09 GMT. 4.03 5.54 5.95 7.75 ***** 13.28 14.55 16.33 13.02 11.82 7.64 5.69 ***** MEAN OF MIXING RATIO AT 15 GMT. 3.97 4.57 5.17 6.88 ***** 12.23 13.99 15.25 11.87 10.21 6.70 5.05 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -8.0 -2.0 0.0 3.0 ***** 14.0 10.0 15.0 11.0 6.0 2.0 0.0 ****** DAY 24 6 1 3 ** 6 14 28 27 27 21 13 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 13.0 30.0 27.0 30.0 ***** 34.0 33.0 34.0 30.0 27.0 30.6 24.0 ****** DAY 30 19 1 17 ** 12 27 3 5 19 1 17 24 HOUR MAXIMUM PRECIPITATION IN MM. 25.0 17.0 38.0 15.0 ***** 13.0 4.0 46.0 76.5 64.0 55.0 21.0 ****** DAY 23 23 8 1 ** 5 22 29 26 27 6 29 MONTHLY TOTAL PRECIPITATION IN MM. 82.0 47.0 176.0 26.0 ***** 40.0 7.0 108.5 308.0 166.0 146.5 129.5 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 24.7 5.3 34.2 35.7 NO. OF DAYS WITH PRECIPITATION. 8 6 12 3 *** 6 3 8 13 7 11 12 *** NO. OF DAYS PRECIPITATION EQUAL 8 6 12 3 *** 6 3 8 13 7 11 12 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 2 7 1 *** 2 0 4 8 4 5 7 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 85 77 85 83 *** 83 80 83 90 79 75 70 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 71 63 70 64 *** 69 61 70 81 77 70 74 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 76 62 71 68 *** 73 68 77 83 83 81 88 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 14 0 0 0 *** 0 0 0 0 0 0 0 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 *** 0 0 20 0 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 *** 0 0 0 0 0 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 1 0 1 *** 5 17 18 1 0 3 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 *** 0 0 0 0 0 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 *** 0 0 0 0 0 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 29 7 4 0 *** 0 0 0 0 0 0 1 *** DATE OF START AND END FREEZING START = 13 DEC. END = 9 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 5.0 5.3 7.5 9.6 17.8 20.6 22.4 20.9 15.9 19.3 11.1 ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. 1.4 2.1 3.2 3.1 11.2 13.0 16.8 16.7 13.0 13.2 7.1 ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.7 8.6 11.7 16.2 24.5 28.1 28.0 25.0 18.9 25.3 15.1 13.9 18.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.3 6.5 8.5 13.1 13.3 15.1 11.2 8.3 5.9 12.1 8.0 ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.09 4.30 4.79 6.10 10.20 13.12 13.89 11.38 7.14 9.36 5.84 4.69 7.91 MEAN OF MIXING RATIO AT 09 GMT. 4.72 4.53 5.40 6.71 12.88 13.68 15.25 12.77 9.21 9.64 7.36 6.04 9.02 MEAN OF MIXING RATIO AT 15 GMT. 3.92 3.88 4.96 5.77 10.73 12.63 13.88 12.06 8.96 15.70 7.08 5.76 8.78 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -1.0 -1.4 0.0 0.0 2.0 10.0 12.0 15.0 7.0 2.0 2.0 ***** ****** DAY 26 5 1 11 2 26 7 4 23 27 15 ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 13.0 15.6 30.0 32.0 30.0 33.0 32.0 28.0 25.0 33.5 27.0 18.5 33.5 DAY 13 11 17 16 13 22 2 3 2 26 22 21 24 HOUR MAXIMUM PRECIPITATION IN MM. 17.0 43.0 35.0 19.5 11.0 30.0 79.0 42.0 27.0 0.0 94.0 23.0 94.0 DAY 16 20 12 1 5 7 6 13 18 ** 29 23 MONTHLY TOTAL PRECIPITATION IN MM. 124.5 149.0 184.0 93.5 22.0 72.0 300.0 172.0 70.0 0.0 340.0 93.0 1620.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 28.2 11.6 33.5 26.7 NO. OF DAYS WITH PRECIPITATION. 18 13 17 10 5 4 9 12 6 0 12 6 112 NO. OF DAYS PRECIPITATION EQUAL 18 13 17 10 5 4 9 12 6 0 12 6 112 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 5 5 7 4 1 3 7 7 3 0 7 4 53 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 89 91 82 76 79 81 85 84 63 81 80 74 80 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 82 72 70 68 73 62 71 71 74 55 78 69 70 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 80 77 77 65 71 64 76 75 77 87 82 73 75 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 2 0 0 0 0 *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 1 1 1 9 12 0 0 3 0 0 27 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 12 8 3 1 0 0 0 0 0 0 0 *** *** DATE OF START AND END FREEZING START = 14 JAN. END = 11 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** 20.2 23.6 26.1 23.5 21.8 16.7 ***** 8.2 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** 14.5 17.7 19.8 17.2 17.3 13.1 ***** 3.7 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.3 11.7 14.3 21.5 24.8 29.5 32.5 29.9 26.2 20.3 ***** 12.7 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** 10.3 11.8 12.7 12.7 8.9 7.2 ***** 9.0 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.55 4.32 5.33 7.69 11.79 14.27 13.82 13.56 11.62 9.34 ***** 4.33 ***** MEAN OF MIXING RATIO AT 09 GMT. 5.05 4.89 6.20 8.28 12.42 14.69 14.08 14.72 13.72 10.58 ***** 5.52 ***** MEAN OF MIXING RATIO AT 15 GMT. 5.36 5.18 6.10 7.46 11.60 15.31 15.15 15.30 13.35 10.21 ***** 5.42 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** 12.0 13.5 16.0 14.0 13.0 8.0 ***** 0.0 ****** DAY ** ** ** ** 19 4 4 16 12 31 ** 5 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 22.0 21.0 26.0 29.0 30.0 33.0 35.0 34.0 32.0 27.0 ***** 18.0 ****** DAY 9 10 26 12 30 28 23 7 1 10 ** 10 24 HOUR MAXIMUM PRECIPITATION IN MM. 30.0 18.0 21.0 16.0 12.0 19.0 0.0 36.0 64.0 77.0 ***** 29.0 ****** DAY 14 3 15 24 6 14 ** 18 15 14 ** 31 MONTHLY TOTAL PRECIPITATION IN MM. 83.0 90.0 61.0 24.0 31.0 27.0 0.0 79.0 276.0 229.0 ***** 116.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 23.0 8.1 34.9 34.0 NO. OF DAYS WITH PRECIPITATION. 6 9 7 2 4 3 0 5 13 14 *** 9 *** NO. OF DAYS PRECIPITATION EQUAL 6 9 7 2 4 3 0 5 13 14 *** 9 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 4 3 1 1 1 0 3 9 7 *** 6 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 81 85 86 82 84 82 68 77 75 89 *** 79 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 68 69 69 58 68 62 49 61 71 77 *** 68 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 76 77 76 59 79 79 67 74 78 84 *** 76 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** 0 0 0 0 0 0 *** 0 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** 0 1 12 1 2 0 *** 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 *** 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 2 18 31 22 9 0 *** 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 *** 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 *** 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** 0 0 0 0 0 0 *** 1 *** DATE OF START AND END FREEZING START = 5 DEC. END = 5 DEC. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 8.8 ***** 5.5 14.6 16.9 22.3 24.1 26.9 24.5 17.4 14.4 10.0 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. 3.5 ***** 1.5 8.8 11.8 17.6 19.4 22.0 18.8 13.0 8.6 5.2 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 14.1 ***** 9.6 20.4 22.0 26.9 28.9 31.7 30.2 21.9 20.2 14.8 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.6 ***** 8.1 11.6 10.2 9.3 9.5 9.7 11.4 8.9 11.6 9.6 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.95 ***** 3.41 7.27 9.60 12.91 14.45 16.18 13.01 8.85 6.30 5.19 ***** MEAN OF MIXING RATIO AT 09 GMT. 5.04 ***** 4.83 8.40 11.02 13.59 14.71 17.18 14.46 9.50 7.20 6.37 ***** MEAN OF MIXING RATIO AT 15 GMT. 4.94 ***** 4.37 7.85 10.29 12.88 14.40 16.91 14.48 9.46 7.00 6.23 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -1.0 ***** -4.0 1.5 8.0 13.0 13.5 19.0 15.5 8.5 3.5 1.0 ****** DAY 29 ** 3 9 8 18 7 30 29 31 30 25 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 21.0 ***** 14.0 32.0 29.0 36.5 33.0 35.0 37.0 32.0 30.0 22.0 ****** DAY 6 ** 4 13 20 10 29 3 18 4 26 5 24 HOUR MAXIMUM PRECIPITATION IN MM. 20.0 ***** 36.0 7.0 41.0 17.0 33.0 0.0 35.0 89.0 48.0 33.0 ****** DAY 21 ** 2 25 7 12 4 ** 10 30 29 18 MONTHLY TOTAL PRECIPITATION IN MM. 64.0 ***** 140.0 14.5 79.5 39.0 112.0 0.0 179.5 409.5 148.0 144.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 15.3 10.0 21.9 52.7 NO. OF DAYS WITH PRECIPITATION. 6 *** 13 3 6 4 6 0 10 12 7 10 *** NO. OF DAYS PRECIPITATION EQUAL 6 *** 13 3 6 4 6 0 10 12 7 10 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 4 *** 5 0 3 2 3 0 7 9 3 5 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 72 *** 67 80 80 81 84 85 88 86 81 83 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 58 *** 75 65 71 65 63 62 75 71 64 79 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 65 *** 73 69 76 69 71 72 82 81 70 82 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** 1 0 0 0 0 0 0 0 0 0 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** 0 0 0 3 10 24 6 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 0 0 0 0 0 0 0 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 3 0 3 11 28 15 1 1 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 2 *** 10 0 0 0 0 0 0 0 0 0 *** DATE OF START AND END FREEZING START = 28 JAN. END = 14 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 3.5 8.3 10.4 16.1 18.7 22.8 25.5 25.6 22.7 ***** 15.4 ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -1.1 2.4 4.9 8.9 13.7 17.3 20.7 20.4 17.2 10.4 8.5 4.0 10.6 AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.2 14.3 16.0 23.2 23.7 28.3 30.3 30.7 28.2 ***** 22.3 ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.3 11.9 11.1 14.3 10.0 11.0 9.6 10.3 11.0 ***** 13.8 ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.09 4.15 5.47 7.46 9.96 13.56 14.05 13.77 12.89 8.49 7.34 5.07 8.78 MEAN OF MIXING RATIO AT 09 GMT. ***** 5.90 6.63 7.74 10.82 14.43 15.10 15.67 14.42 9.62 8.35 5.79 ***** MEAN OF MIXING RATIO AT 15 GMT. 3.59 5.51 6.24 8.09 10.36 14.05 15.15 14.73 13.27 9.20 7.55 5.65 9.45 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -3.5 -1.0 1.0 4.5 8.0 13.0 14.5 16.5 14.0 3.0 3.0 1.0 -3.5 DAY 15 1 12 4 2 9 1 30 30 30 27 12 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.0 22.0 23.0 31.5 31.0 32.0 33.0 34.0 31.5 ***** 26.0 ***** ****** DAY 3 14 22 14 15 6 15 12 3 ** 11 ** 24 HOUR MAXIMUM PRECIPITATION IN MM. 16.0 23.0 8.0 12.0 58.0 137.0 3.0 76.0 58.0 51.0 52.0 34.0 137.0 DAY 3 7 9 20 21 27 11 19 30 11 12 12 MONTHLY TOTAL PRECIPITATION IN MM. 116.0 27.0 30.0 20.0 112.5 209.0 3.0 127.0 114.5 279.5 165.0 169.0 1372.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 12.6 24.9 17.8 44.7 NO. OF DAYS WITH PRECIPITATION. 13 2 5 2 6 5 1 5 7 12 7 11 76 NO. OF DAYS PRECIPITATION EQUAL 13 2 5 2 6 5 1 5 7 12 7 10 75 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 5 1 0 1 2 2 0 4 3 9 6 6 39 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 78 80 82 82 85 87 83 86 89 93 92 85 85 MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** 73 78 62 65 63 63 70 74 79 75 75 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 73 72 77 69 69 70 70 67 73 82 73 75 73 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 2 17 14 0 0 0 0 33 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 *** 0 *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 3 1 10 21 24 8 *** 0 *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 *** 0 *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 *** 0 *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 28 2 0 0 0 0 0 0 0 0 0 0 30 DATE OF START AND END FREEZING START = 4 JAN. END = 2 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** 8.9 12.7 15.6 16.4 19.5 25.3 24.6 24.1 21.1 11.2 13.8 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. 4.0 3.8 5.2 8.0 9.9 13.1 19.6 19.6 17.5 13.7 4.4 5.9 10.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** 14.1 19.9 23.3 22.9 26.0 31.0 29.7 30.7 28.5 17.9 21.7 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** 10.3 14.7 15.3 13.0 12.9 11.4 10.1 13.2 14.8 13.5 15.8 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.53 4.84 5.50 6.84 8.83 10.91 14.11 13.62 12.96 9.50 4.85 5.41 8.49 MEAN OF MIXING RATIO AT 09 GMT. 5.38 5.60 6.70 8.15 9.99 12.30 15.87 14.95 14.96 12.75 8.38 6.74 10.15 MEAN OF MIXING RATIO AT 15 GMT. 5.50 5.27 6.31 7.87 9.62 12.10 15.18 14.09 14.36 14.61 7.27 6.59 9.90 ABSOLUTE OF MINIMUM TEMPERATURE IN C. 0.5 1.0 1.5 2.0 6.0 8.0 12.5 14.5 14.0 11.0 2.0 -1.0 -1.0 DAY 15 23 8 12 14 2 1 23 28 14 3 24 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** 22.0 24.0 32.0 26.0 32.0 34.0 32.0 37.0 34.0 31.0 28.0 ****** DAY ** 16 8 11 14 17 12 4 10 31 3 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 21.0 18.5 21.0 14.5 25.5 55.0 2.0 31.0 23.0 46.0 89.5 29.5 89.5 DAY 21 22 7 11 7 2 6 19 26 15 14 23 MONTHLY TOTAL PRECIPITATION IN MM. 74.0 90.5 76.0 35.5 80.5 121.0 3.5 49.5 35.5 179.0 361.0 122.5 1228.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 19.6 19.3 7.2 53.9 NO. OF DAYS WITH PRECIPITATION. 8 10 6 6 9 7 2 3 3 10 16 9 89 NO. OF DAYS PRECIPITATION EQUAL 8 10 6 6 9 7 2 3 3 10 16 9 89 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 4 4 1 4 2 0 2 1 8 9 5 43 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 80 87 85 85 90 90 87 87 88 82 80 77 85 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 71 77 74 70 73 69 64 66 71 76 78 71 72 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 76 77 75 71 76 73 66 67 64 76 77 75 73 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 10 13 2 0 0 0 25 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** 0 0 0 0 0 0 0 0 0 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** 0 0 3 0 2 24 17 23 15 2 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** 0 0 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** 0 0 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 0 0 0 0 0 0 0 0 0 0 0 1 1 DATE OF START AND END FREEZING START = 24 DEC. END = 24 DEC. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 8.9 12.9 12.6 17.2 19.3 22.6 26.0 26.2 24.8 20.0 18.4 14.5 18.6 AVERAGE OF MINIMUM TEMPERATURE IN C. 3.2 4.2 5.0 9.9 13.4 17.0 20.9 19.9 18.2 14.8 9.5 5.8 11.8 AVERAGE OF MAXIMUM TEMPERATURE IN C. 14.6 21.8 20.2 24.7 25.1 28.2 31.1 32.4 31.4 25.1 27.2 23.2 25.4 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.4 17.6 15.2 14.8 11.7 11.2 10.2 12.5 13.2 10.3 17.7 17.4 13.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.32 4.98 5.62 7.80 9.71 11.89 14.58 14.10 14.15 10.72 7.77 5.91 9.30 MEAN OF MIXING RATIO AT 09 GMT. 4.81 5.77 6.64 8.49 10.42 12.53 14.98 14.68 14.39 12.00 8.85 6.88 10.04 MEAN OF MIXING RATIO AT 15 GMT. 4.71 5.62 6.03 8.13 9.78 11.97 14.44 14.14 14.05 11.80 8.55 6.67 9.66 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -1.0 0.0 -1.0 5.5 6.5 14.0 18.0 18.0 13.0 8.5 5.5 1.0 -1.0 DAY 9 28 2 29 1 14 9 2 29 28 7 23 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 30.0 25.5 25.0 31.0 29.0 33.0 33.0 35.0 34.0 31.0 32.5 25.0 35.0 DAY 4 17 16 5 20 19 24 16 18 24 3 8 24 HOUR MAXIMUM PRECIPITATION IN MM. 40.0 42.0 59.0 22.5 25.0 7.5 23.5 16.5 27.5 36.5 48.0 181.0 181.0 DAY 23 28 27 26 7 5 8 1 20 8 4 16 MONTHLY TOTAL PRECIPITATION IN MM. 164.5 142.0 93.5 70.5 60.0 14.5 60.5 20.0 86.5 195.0 119.0 270.0 1296.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 30.9 11.2 12.9 45.1 NO. OF DAYS WITH PRECIPITATION. 12 12 7 8 3 2 5 2 9 10 8 7 85 NO. OF DAYS PRECIPITATION EQUAL 12 12 7 8 3 2 5 2 9 10 8 7 85 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 6 4 2 3 3 0 3 1 3 7 5 4 41 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 80 83 88 90 81 85 82 84 92 88 88 85 86 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 66 70 70 74 65 65 61 54 66 74 76 74 68 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 70 71 69 78 66 67 64 56 71 76 77 76 70 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 18 6 7 0 0 0 31 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 1 0 0 2 0 10 30 29 24 2 11 0 109 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 7 1 6 0 0 0 0 0 0 0 0 0 14 DATE OF START AND END FREEZING START = 9 JAN. END = 8 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** 9.9 15.7 22.8 23.6 26.6 26.5 22.6 16.4 13.8 ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** 3.3 9.0 13.8 16.7 19.7 18.8 16.3 11.9 9.2 ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** 16.5 22.6 31.8 31.0 33.4 34.2 28.6 21.2 18.4 ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** 13.2 13.6 17.9 14.3 13.7 15.4 12.3 9.3 9.2 ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** 5.23 6.91 10.57 12.39 14.77 14.77 12.00 8.80 7.32 ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** 5.81 8.29 11.44 14.39 15.51 16.34 14.77 11.54 10.51 ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** 5.43 7.95 10.81 13.43 14.92 15.02 13.95 10.55 9.15 ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** 0.0 3.0 9.0 10.0 18.5 16.5 11.0 7.0 5.5 ***** ****** DAY ** ** 8 18 16 2 1 30 23 22 26 ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** 24.0 29.0 36.0 37.0 35.0 35.0 31.0 26.5 25.0 ***** ****** DAY ** ** 31 26 24 4 26 1 2 4 4 ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** 39.0 14.0 50.0 0.0 0.0 17.5 38.0 101.0 43.0 ***** ****** DAY ** ** 16 14 16 ** ** 27 21 20 10 ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** 121.0 33.5 53.0 0.0 0.0 58.0 109.5 273.5 84.0 ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 16.5 11.8 22.9 48.8 NO. OF DAYS WITH PRECIPITATION. *** *** 12 5 2 0 0 8 8 11 5 *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** 12 5 2 0 0 8 8 11 5 *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** 3 1 1 0 0 2 4 5 2 *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** 86 82 86 80 76 85 91 88 87 *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** 78 74 71 62 54 71 80 83 86 *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** 77 75 70 62 55 69 79 86 89 *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** 0 0 0 0 0 0 0 0 0 *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** 0 0 0 0 3 2 1 0 0 *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** 0 0 0 0 0 0 0 0 0 *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** 0 0 24 21 29 29 10 0 0 *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** 0 0 0 0 0 0 0 0 0 *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** 0 0 0 0 0 0 0 0 0 *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** 5 0 0 0 0 0 0 0 0 *** *** DATE OF START AND END FREEZING START = 8 MAR. END = 18 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 7.5 5.7 8.8 15.9 18.7 22.5 25.8 24.4 23.4 16.4 9.9 7.7 15.5 AVERAGE OF MINIMUM TEMPERATURE IN C. 3.2 1.0 4.3 10.5 14.9 17.9 21.1 19.5 18.6 12.6 6.5 2.2 11.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.4 9.8 12.8 20.8 22.4 26.2 30.5 28.5 27.9 20.0 12.6 13.2 19.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.2 8.8 8.5 10.3 7.5 8.3 9.4 9.0 9.3 7.4 6.1 11.0 8.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.66 3.84 5.09 7.80 10.49 13.02 15.20 13.96 13.19 9.27 5.88 4.21 8.88 MEAN OF MIXING RATIO AT 09 GMT. 5.52 4.29 5.75 9.12 11.26 14.08 16.76 16.57 14.83 10.54 7.14 5.75 10.13 MEAN OF MIXING RATIO AT 15 GMT. 5.42 4.61 5.56 8.52 10.77 13.15 15.51 15.50 13.24 9.64 6.77 5.12 9.48 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -1.0 -2.5 0.5 5.0 10.5 15.5 18.0 17.5 15.5 8.5 3.5 -2.0 -2.5 DAY 24 19 27 3 7 4 7 18 19 10 16 8 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 23.5 22.0 24.5 31.5 26.5 30.5 36.5 32.5 33.0 27.5 24.5 19.5 36.5 DAY 8 3 31 23 31 9 19 19 1 15 6 31 24 HOUR MAXIMUM PRECIPITATION IN MM. 26.5 37.5 22.5 8.0 25.5 17.0 0.0 43.0 35.0 160.0 38.0 54.0 160.0 DAY 13 17 20 8 9 24 ** 14 19 7 11 7 MONTHLY TOTAL PRECIPITATION IN MM. 111.5 215.0 121.5 17.5 84.5 46.0 0.0 119.5 64.0 499.0 269.0 109.5 1657.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 27.0 8.9 11.1 53.0 NO. OF DAYS WITH PRECIPITATION. 12 13 9 5 12 7 0 10 4 18 12 4 106 NO. OF DAYS PRECIPITATION EQUAL 12 13 9 5 12 7 0 10 4 18 12 4 106 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 5 9 7 0 3 1 0 6 2 12 10 3 58 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 88 85 90 85 90 89 87 91 91 93 90 83 89 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 72 65 71 68 75 71 68 77 70 80 79 70 72 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 81 80 81 76 79 75 73 82 67 84 88 77 79 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 14 4 3 0 0 0 21 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 1 0 3 15 10 4 0 0 0 33 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 3 7 0 0 0 0 0 0 0 0 0 3 13 DATE OF START AND END FREEZING START = 8 DEC. END = 19 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** 9.4 9.7 15.7 21.0 22.7 26.6 24.8 21.3 16.9 15.2 8.7 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** 3.4 4.3 9.8 16.0 18.8 21.7 21.3 17.6 12.6 11.1 5.0 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** 15.4 15.1 21.4 25.8 26.6 31.6 27.7 24.7 21.3 18.9 13.1 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** 12.0 10.8 11.6 9.8 7.8 9.9 6.4 7.1 8.7 7.8 8.1 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** 4.56 4.87 7.09 11.49 13.56 15.58 14.83 12.65 9.03 7.52 5.51 ***** MEAN OF MIXING RATIO AT 09 GMT. ***** 5.21 5.66 8.22 12.20 14.21 16.13 15.46 13.43 10.74 8.29 6.35 ***** MEAN OF MIXING RATIO AT 15 GMT. ***** 4.93 5.02 8.24 11.08 13.95 16.13 14.66 12.42 9.88 8.08 5.85 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** 0.0 -1.0 6.5 12.0 14.5 17.5 17.0 13.5 9.5 4.5 1.0 ****** DAY ** 23 8 1 1 1 1 26 29 8 27 15 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** 24.5 23.5 32.0 31.5 31.0 37.5 35.0 30.0 25.5 28.0 23.0 ****** DAY ** 19 12 18 26 18 26 15 8 7 17 2 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** 6.0 19.5 25.0 26.5 18.0 21.0 17.0 46.0 51.0 33.0 90.0 ****** DAY ** 21 16 23 31 26 30 25 14 16 26 14 MONTHLY TOTAL PRECIPITATION IN MM. ***** 6.0 97.0 61.5 68.0 73.0 39.0 87.0 142.5 185.5 153.0 195.5 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 9.3 18.3 24.2 48.2 NO. OF DAYS WITH PRECIPITATION. *** 1 10 8 8 10 3 11 13 8 11 12 *** NO. OF DAYS PRECIPITATION EQUAL *** 1 10 8 8 10 3 11 13 8 11 12 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** 0 5 2 3 3 1 4 5 4 7 4 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** 82 82 84 87 89 83 88 93 91 82 90 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** 59 63 59 65 71 61 72 76 73 68 73 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** 72 66 77 72 78 69 78 80 77 78 84 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** 0 0 0 0 0 0 0 0 0 0 0 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** 0 0 0 0 2 23 19 1 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** 0 0 0 0 0 0 0 0 0 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** 0 0 1 2 3 21 9 2 0 0 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** 0 0 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** 0 0 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** 1 4 0 0 0 0 0 0 0 0 0 *** DATE OF START AND END FREEZING START = 23 FEB. END = 9 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 7.9 3.4 7.9 14.3 18.7 22.5 26.6 24.2 22.6 18.4 13.4 5.6 15.5 AVERAGE OF MINIMUM TEMPERATURE IN C. 4.1 0.8 5.8 10.5 13.7 18.1 21.9 20.6 18.8 13.5 9.8 1.9 11.6 AVERAGE OF MAXIMUM TEMPERATURE IN C. 11.7 5.9 10.2 18.4 22.7 26.7 31.5 27.2 26.4 22.9 17.1 8.4 19.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.6 5.1 4.4 7.9 9.0 8.6 9.6 6.6 7.6 9.4 7.3 6.5 7.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 5.01 3.95 5.77 8.02 9.18 12.12 15.59 14.71 13.33 9.38 7.95 4.33 9.11 MEAN OF MIXING RATIO AT 09 GMT. 6.09 4.01 5.68 9.27 10.29 13.32 15.28 15.88 13.33 10.55 8.70 4.78 9.77 MEAN OF MIXING RATIO AT 15 GMT. 5.65 4.09 5.37 8.42 9.55 11.90 15.18 15.08 13.36 9.98 7.37 4.48 9.20 ABSOLUTE OF MINIMUM TEMPERATURE IN C. 0.0 -4.0 1.0 5.5 7.0 14.5 18.5 18.0 16.5 6.5 6.5 -0.5 -4.0 DAY 29 1 14 5 2 17 4 13 22 21 17 6 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 17.0 9.5 15.5 25.5 33.5 33.5 36.5 32.5 31.5 30.5 24.5 14.5 36.5 DAY 6 19 29 27 26 10 22 24 12 14 25 13 24 HOUR MAXIMUM PRECIPITATION IN MM. 39.5 37.0 31.5 13.5 35.0 16.5 4.0 55.0 19.0 85.5 53.0 30.0 85.5 DAY 30 5 26 24 6 15 28 11 7 19 30 6 MONTHLY TOTAL PRECIPITATION IN MM. 115.5 190.0 124.5 43.0 119.0 21.5 4.0 172.5 33.5 178.0 183.0 205.0 1389.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 30.9 13.2 15.1 40.7 NO. OF DAYS WITH PRECIPITATION. 9 18 12 9 10 3 1 10 5 10 16 17 120 NO. OF DAYS PRECIPITATION EQUAL 9 18 12 9 10 3 1 10 5 10 16 17 120 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 5 5 2 4 1 0 4 1 3 6 7 41 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 90 92 92 93 85 83 84 90 91 90 92 89 89 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 75 76 79 77 68 68 59 76 67 68 77 77 72 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 80 87 82 81 74 71 72 80 75 71 78 83 78 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 1 0 0 0 0 0 0 0 0 0 0 1 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 3 26 11 2 0 0 0 42 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 2 5 18 9 2 1 0 0 37 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 3 10 0 0 0 0 0 0 0 0 0 3 16 DATE OF START AND END FREEZING START = 6 DEC. END = 21 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 6.0 7.9 5.4 15.1 20.5 24.3 24.6 26.1 23.4 17.1 13.9 8.8 16.1 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.0 2.8 1.9 10.3 15.2 19.6 20.8 20.7 19.3 13.5 10.3 5.4 11.8 AVERAGE OF MAXIMUM TEMPERATURE IN C. 10.8 12.7 9.2 19.9 25.4 29.0 28.2 30.9 27.0 20.2 17.4 12.1 20.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.8 9.9 7.3 9.6 10.2 9.4 7.4 10.2 7.7 6.7 7.1 6.7 8.4 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.61 4.38 4.65 7.57 10.78 13.81 14.00 14.45 13.49 9.62 7.99 5.65 9.25 MEAN OF MIXING RATIO AT 09 GMT. 5.42 4.74 5.24 8.94 11.90 14.67 15.24 14.97 13.88 10.51 9.07 6.61 10.10 MEAN OF MIXING RATIO AT 15 GMT. 4.75 4.63 4.84 8.08 10.78 13.84 13.95 13.91 12.90 9.81 8.27 5.72 9.29 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -2.0 -2.0 -6.0 6.5 8.5 17.0 19.0 17.5 14.5 9.5 7.5 2.0 -6.0 DAY 4 23 11 1 5 2 29 29 21 24 21 5 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 23.5 24.5 19.5 26.5 30.5 31.5 32.5 34.5 32.5 26.5 22.5 17.5 34.5 DAY 21 13 21 9 21 19 13 7 6 18 3 8 24 HOUR MAXIMUM PRECIPITATION IN MM. 20.5 18.0 46.0 5.0 6.0 6.0 26.5 12.0 52.5 204.0 46.0 41.5 204.0 DAY 16 18 8 28 24 15 28 25 16 11 19 14 MONTHLY TOTAL PRECIPITATION IN MM. 111.0 87.0 194.5 16.0 13.5 10.5 82.5 29.5 157.5 397.5 215.5 229.5 1544.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 25.4 2.6 17.4 54.5 NO. OF DAYS WITH PRECIPITATION. 10 9 15 6 5 4 10 5 8 14 13 13 112 NO. OF DAYS PRECIPITATION EQUAL 10 9 15 6 5 4 10 5 8 14 13 13 112 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 4 4 8 0 0 0 2 1 3 5 10 10 47 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 92 85 90 86 87 85 84 86 91 95 94 92 89 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 76 63 80 69 65 65 71 61 71 78 79 80 72 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 85 75 89 75 74 70 74 67 77 83 83 85 78 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 1 0 0 0 0 0 0 0 0 0 1 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 6 14 14 7 0 0 0 41 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 1 9 8 20 10 0 0 0 48 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 5 7 13 0 0 0 0 0 0 0 0 0 25 DATE OF START AND END FREEZING START = 3 JAN. END = 16 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 8.9 7.5 6.7 14.4 18.5 22.9 25.6 26.0 24.3 17.5 11.6 8.3 16.0 AVERAGE OF MINIMUM TEMPERATURE IN C. 3.6 3.3 3.2 10.0 13.9 17.5 20.5 20.8 19.2 13.9 8.3 3.2 11.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 14.1 11.9 10.2 19.5 23.0 28.3 30.7 31.3 29.2 21.0 15.0 13.6 20.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.5 8.7 7.0 9.5 9.1 10.8 10.2 10.5 10.0 7.1 6.7 10.4 9.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.74 4.67 4.78 7.47 9.92 12.33 15.40 15.81 14.27 10.00 6.96 4.79 9.26 MEAN OF MIXING RATIO AT 09 GMT. 6.08 5.77 5.40 8.32 10.33 12.78 16.06 15.79 15.17 10.62 7.66 6.17 10.01 MEAN OF MIXING RATIO AT 15 GMT. 5.47 5.12 5.10 7.68 9.77 12.39 14.63 14.75 14.41 9.68 7.18 5.57 9.31 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -3.0 0.0 0.5 6.0 11.5 14.0 18.5 16.5 13.5 11.5 5.0 -1.5 -3.0 DAY 21 3 3 1 9 21 3 31 30 8 16 17 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 22.5 22.5 15.5 36.5 31.0 32.5 34.5 33.5 35.0 32.5 27.0 26.5 36.5 DAY 9 27 27 15 3 3 8 17 3 22 9 27 24 HOUR MAXIMUM PRECIPITATION IN MM. 16.0 39.0 20.0 17.0 9.0 28.0 21.0 72.0 65.0 42.0 66.0 56.0 72.0 DAY 20 1 2 1 16 21 30 24 30 7 5 9 MONTHLY TOTAL PRECIPITATION IN MM. 37.0 128.5 138.5 23.3 40.5 67.5 46.5 80.0 151.5 196.5 246.5 186.5 1342.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 22.6 9.8 20.7 46.9 NO. OF DAYS WITH PRECIPITATION. 6 11 16 3 11 7 5 2 8 15 19 11 114 NO. OF DAYS PRECIPITATION EQUAL 6 11 16 3 11 7 5 2 8 15 19 11 114 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 6 6 1 0 2 2 1 3 7 8 6 44 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 86 88 91 86 90 83 89 90 90 92 92 86 89 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 71 76 77 70 68 60 65 62 66 74 78 70 70 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 78 79 83 73 74 70 69 68 73 78 83 77 75 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 11 16 4 0 0 0 31 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 1 1 14 21 26 12 1 0 0 76 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 3 2 0 0 0 0 0 0 0 0 0 3 8 DATE OF START AND END FREEZING START = 12 DEC. END = 4 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 9.7 8.2 8.7 11.1 19.1 24.3 25.1 25.0 20.8 13.3 11.6 9.3 15.5 AVERAGE OF MINIMUM TEMPERATURE IN C. 5.0 3.9 5.7 6.6 14.1 18.6 20.2 20.9 16.1 10.2 7.7 4.5 11.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 14.5 12.3 11.8 16.0 24.8 30.1 30.0 29.0 25.5 16.7 15.9 14.0 20.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.5 8.4 6.1 9.4 10.7 11.5 9.8 8.1 9.4 6.5 8.2 9.5 8.9 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 5.22 4.86 5.45 5.81 10.30 13.01 14.74 15.37 12.06 7.82 6.35 5.14 8.85 MEAN OF MIXING RATIO AT 09 GMT. 6.23 6.13 6.01 7.16 11.23 13.26 14.77 15.58 13.90 8.51 7.32 6.45 9.71 MEAN OF MIXING RATIO AT 15 GMT. 5.61 5.69 5.75 6.63 10.59 12.64 14.01 14.79 12.59 7.90 6.84 6.11 9.10 ABSOLUTE OF MINIMUM TEMPERATURE IN C. 2.5 0.0 3.5 3.0 8.5 16.0 16.0 16.0 12.0 6.2 3.5 0.0 0.0 DAY 22 7 1 7 1 2 4 29 8 27 30 29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 25.5 26.5 25.5 26.5 37.5 34.5 33.5 34.5 29.5 27.5 22.5 21.5 37.5 DAY 31 25 6 12 23 19 16 9 11 1 21 22 24 HOUR MAXIMUM PRECIPITATION IN MM. 14.0 12.0 23.5 19.5 9.5 3.0 27.0 44.0 61.0 110.0 26.0 25.0 110.0 DAY 20 21 14 5 30 5 10 28 23 9 26 26 MONTHLY TOTAL PRECIPITATION IN MM. 41.0 61.5 88.5 85.0 12.5 3.0 61.5 65.0 199.5 425.0 99.5 98.5 1240.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 15.4 8.1 26.3 50.2 NO. OF DAYS WITH PRECIPITATION. 9 9 14 14 2 1 5 3 13 15 7 12 104 NO. OF DAYS PRECIPITATION EQUAL 9 9 14 14 2 1 5 3 13 15 7 12 104 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 3 2 2 0 0 2 2 4 11 5 4 36 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 84 89 90 86 88 84 88 89 91 93 87 88 88 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 68 73 75 71 66 55 62 67 74 76 71 72 69 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 75 79 81 78 73 65 69 76 80 82 78 82 77 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 4 11 16 0 0 0 0 31 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 2 19 21 16 0 0 0 0 58 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 0 1 0 0 0 0 0 0 0 0 0 1 2 DATE OF START AND END FREEZING START = 29 DEC. END = 7 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 6.2 6.8 11.4 15.7 18.0 25.0 25.6 24.0 21.7 18.0 13.3 11.3 16.4 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.4 2.0 5.0 9.6 13.2 19.5 20.9 19.8 17.8 14.1 8.2 6.1 11.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 10.0 11.7 17.8 21.9 22.9 30.4 30.3 28.1 25.6 21.9 18.4 16.5 21.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.6 9.7 12.8 12.3 9.7 10.9 9.4 8.3 7.8 7.8 10.2 10.4 9.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.36 4.26 5.11 7.34 9.56 14.24 15.56 14.38 12.70 9.81 6.58 5.70 9.13 MEAN OF MIXING RATIO AT 09 GMT. 5.56 6.12 7.67 10.22 10.88 15.39 16.40 15.03 13.86 10.90 8.36 7.87 10.69 MEAN OF MIXING RATIO AT 15 GMT. 5.37 5.65 7.09 9.38 10.34 14.22 15.68 14.90 13.12 10.38 7.96 7.64 10.14 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -1.0 -2.0 0.4 5.5 6.5 15.5 17.5 16.0 15.0 10.5 2.5 -1.5 -2.0 DAY 4 7 11 4 3 1 2 31 22 16 15 29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.5 25.5 34.5 31.5 28.5 35.5 33.5 32.5 30.5 25.5 26.5 20.5 35.5 DAY 8 29 4 16 20 13 3 8 8 5 8 19 24 HOUR MAXIMUM PRECIPITATION IN MM. 60.5 42.0 21.5 24.0 12.0 48.0 29.5 100.0 49.5 30.5 29.5 26.5 100.0 DAY 19 1 6 29 2 24 24 4 13 22 11 28 MONTHLY TOTAL PRECIPITATION IN MM. 199.5 97.5 50.0 64.5 37.5 97.5 56.5 296.0 248.0 127.5 137.0 70.0 1481.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 23.4 13.5 40.5 22.6 NO. OF DAYS WITH PRECIPITATION. 14 9 8 7 7 5 5 11 18 13 19 8 124 NO. OF DAYS PRECIPITATION EQUAL 14 9 8 7 7 5 5 11 18 13 19 8 124 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 8 2 1 3 1 3 2 8 7 5 5 2 47 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 90 87 81 85 87 84 87 89 89 85 84 84 86 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 77 75 68 70 68 63 66 68 72 71 67 71 70 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 86 81 75 78 77 69 74 77 78 78 77 80 78 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 7 16 4 0 0 0 0 27 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 1 1 0 15 15 8 2 0 0 0 42 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 2 7 0 0 0 0 0 0 0 0 0 3 12 DATE OF START AND END FREEZING START = 28 DEC. END = 17 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 6.4 6.4 11.7 15.2 19.2 23.7 25.7 25.2 21.4 17.9 15.1 11.2 16.6 AVERAGE OF MINIMUM TEMPERATURE IN C. 1.2 1.2 6.5 9.0 13.0 17.9 20.5 19.9 16.2 12.5 9.7 5.7 11.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 11.3 11.1 16.9 21.7 25.4 29.7 31.0 30.5 26.7 23.4 20.6 16.7 22.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.1 9.9 10.4 12.7 12.4 11.8 10.5 10.6 10.5 10.9 10.9 11.0 11.0 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.77 3.82 5.49 6.81 8.41 12.56 14.89 14.95 11.66 8.89 7.20 5.31 8.65 MEAN OF MIXING RATIO AT 09 GMT. 5.40 5.54 7.92 11.02 13.07 14.67 15.88 16.64 14.27 11.15 9.49 7.31 11.03 MEAN OF MIXING RATIO AT 15 GMT. 5.03 5.10 7.33 9.94 12.21 14.26 15.45 16.30 13.84 10.59 9.23 6.77 10.50 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -3.5 -3.5 0.0 6.5 8.5 15.5 18.5 17.5 10.5 8.5 3.5 2.0 -3.5 DAY 5 5 30 2 1 2 3 2 22 24 22 8 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 19.5 23.5 24.5 25.5 34.5 32.5 34.5 31.5 31.5 27.5 30.5 23.0 34.5 DAY 1 28 26 3 10 11 22 2 1 5 27 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 38.5 64.5 49.5 16.5 14.0 0.0 16.0 23.0 98.0 48.0 57.5 55.5 98.0 DAY 11 13 29 8 18 ** 10 18 19 21 7 3 MONTHLY TOTAL PRECIPITATION IN MM. 237.0 220.0 210.5 24.5 19.0 0.0 20.0 59.0 348.0 221.5 125.5 368.5 1853.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 36.0 2.3 23.0 38.6 NO. OF DAYS WITH PRECIPITATION. 15 8 11 3 3 0 3 4 8 12 6 16 89 NO. OF DAYS PRECIPITATION EQUAL 15 8 11 3 3 0 3 4 8 12 6 16 89 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 9 7 6 1 1 0 1 3 7 6 4 12 57 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 83 87 77 80 76 79 82 83 81 82 81 79 81 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 71 72 71 72 69 61 62 66 68 65 66 68 68 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 79 80 77 78 77 70 71 76 77 74 78 76 76 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 1 9 5 0 0 0 0 15 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 2 16 22 22 4 0 1 0 67 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 8 8 1 0 0 0 0 0 0 0 0 0 17 DATE OF START AND END FREEZING START = 5 JAN. END = 30 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 7.3 9.9 13.1 14.5 17.9 23.4 26.1 24.0 22.3 20.4 20.8 17.8 18.1 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.0 3.4 7.0 8.3 11.7 17.4 20.1 17.9 16.6 15.0 14.7 12.2 12.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.5 16.4 19.1 20.6 24.1 29.4 32.0 30.0 28.0 25.7 26.9 23.5 24.0 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.5 13.0 12.1 12.3 12.4 12.0 11.9 12.1 11.4 10.7 12.2 11.3 11.8 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.08 4.35 5.74 6.27 7.89 12.11 14.97 12.68 11.86 10.22 10.05 8.63 9.07 MEAN OF MIXING RATIO AT 09 GMT. 5.84 7.42 8.80 9.60 11.79 15.13 18.23 17.50 15.39 14.30 15.21 13.03 12.69 MEAN OF MIXING RATIO AT 15 GMT. 5.65 7.11 8.27 8.95 11.27 14.53 17.49 17.47 15.38 13.65 14.98 12.17 12.24 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -2.0 1.5 1.5 4.5 8.0 11.5 15.5 15.0 14.0 11.5 12.5 6.5 -2.0 DAY 11 4 18 3 23 1 1 18 20 6 28 30 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 16.0 25.5 23.0 29.0 29.5 32.5 34.5 31.5 30.5 28.5 29.5 27.5 34.5 DAY 1 28 12 28 27 11 20 3 5 25 7 7 24 HOUR MAXIMUM PRECIPITATION IN MM. 47.0 39.5 45.0 61.5 40.5 4.0 34.5 16.0 14.0 68.0 31.0 53.0 68.0 DAY 6 19 15 1 13 22 31 25 16 14 13 11 MONTHLY TOTAL PRECIPITATION IN MM. 259.5 143.0 138.0 191.5 66.5 8.0 66.0 48.0 34.5 312.0 78.0 364.5 1709.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 31.6 15.6 8.7 44.1 NO. OF DAYS WITH PRECIPITATION. 12 9 6 8 5 3 3 4 5 13 4 14 86 NO. OF DAYS PRECIPITATION EQUAL 12 9 6 8 5 3 3 4 5 13 4 14 86 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 10 6 4 5 2 0 2 2 1 12 4 11 59 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 83 79 76 79 77 80 80 79 83 80 81 81 80 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 70 69 71 68 68 64 66 71 72 74 73 76 70 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 80 78 76 76 78 74 76 82 81 79 80 80 78 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 14 1 0 0 0 0 15 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 9 27 14 3 0 0 0 53 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 4 0 0 0 0 0 0 0 0 0 0 0 4 DATE OF START AND END FREEZING START = 11 JAN. END = 30 JAN. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 8.9 8.5 10.5 13.1 15.5 21.8 23.8 21.8 20.9 19.8 13.9 11.4 15.8 AVERAGE OF MINIMUM TEMPERATURE IN C. 4.3 3.6 6.0 9.5 10.6 14.3 17.3 15.9 15.9 16.1 10.0 7.0 10.9 AVERAGE OF MAXIMUM TEMPERATURE IN C. 13.3 13.4 15.1 16.6 20.4 29.3 30.3 27.6 25.9 23.4 17.8 15.8 20.8 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.1 9.8 9.1 7.1 9.8 15.0 13.0 11.7 10.0 7.3 7.8 8.8 9.9 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.80 4.56 5.29 6.96 7.57 10.33 12.47 11.28 11.06 11.15 7.16 5.78 8.20 MEAN OF MIXING RATIO AT 09 GMT. 6.31 6.74 7.20 7.73 8.86 15.11 15.53 15.01 14.09 12.17 8.42 7.69 10.40 MEAN OF MIXING RATIO AT 15 GMT. 5.93 6.12 6.77 7.62 8.58 13.87 14.32 14.02 12.96 11.25 7.81 7.43 9.72 ABSOLUTE OF MINIMUM TEMPERATURE IN C. 1.5 0.0 2.5 7.5 9.5 10.0 13.5 14.5 14.5 14.5 8.5 2.0 0.0 DAY 22 15 1 1 1 4 31 6 17 30 14 16 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 17.5 18.5 18.5 18.5 28.0 34.5 35.5 30.5 29.5 26.5 21.5 20.6 35.5 DAY 4 18 1 30 31 28 7 3 6 25 13 5 24 HOUR MAXIMUM PRECIPITATION IN MM. 49.0 38.0 37.5 18.0 28.0 2.0 28.0 7.0 55.0 29.0 51.0 56.0 56.0 DAY 5 21 15 1 15 17 16 13 25 22 7 13 MONTHLY TOTAL PRECIPITATION IN MM. 158.5 196.5 186.5 40.0 61.0 2.0 90.0 7.0 164.5 118.5 252.0 167.0 1443.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 37.5 7.1 18.1 37.2 NO. OF DAYS WITH PRECIPITATION. 8 7 7 3 4 1 5 1 8 8 12 7 71 NO. OF DAYS PRECIPITATION EQUAL 8 7 7 3 4 1 4 1 8 8 12 7 70 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 6 7 7 2 2 0 4 0 5 6 10 7 56 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 82 82 77 79 77 78 80 81 81 83 82 79 80 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 73 73 72 70 65 64 63 69 71 71 70 74 70 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 77 76 77 77 74 70 69 73 75 74 75 78 75 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 1 0 0 0 0 0 1 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 12 16 2 0 0 0 0 30 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 0 1 0 0 0 0 0 0 0 0 0 0 1 DATE OF START AND END FREEZING START = 15 FEB. END = 15 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 7.6 7.1 8.5 12.0 13.9 19.7 19.7 21.5 20.5 17.4 14.9 12.0 14.6 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.3 2.7 4.1 8.2 9.8 12.7 13.7 16.5 15.7 12.6 10.7 7.9 9.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.9 11.7 12.6 15.8 17.9 26.7 25.6 26.5 25.0 22.1 19.3 16.1 19.4 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.6 9.0 8.5 7.6 8.1 14.0 11.9 10.0 9.3 9.5 8.5 8.2 9.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.21 4.18 4.66 5.93 6.84 8.88 9.16 11.25 10.68 8.75 7.61 6.02 7.35 MEAN OF MIXING RATIO AT 09 GMT. 6.13 5.18 5.70 7.05 7.69 11.57 11.91 12.91 12.76 10.12 8.25 7.18 8.87 MEAN OF MIXING RATIO AT 15 GMT. 5.71 4.88 5.30 6.62 7.04 10.59 11.07 11.78 11.62 9.45 7.71 6.63 8.20 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -3.5 -2.0 -1.5 5.5 6.5 8.5 11.5 14.5 9.5 10.5 8.5 5.5 -3.5 DAY 28 2 13 18 3 7 11 1 29 1 25 30 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 16.5 16.0 16.0 22.5 24.5 31.5 31.5 29.5 28.5 27.5 23.5 19.5 31.5 DAY 3 6 31 21 29 27 24 16 10 28 22 12 24 HOUR MAXIMUM PRECIPITATION IN MM. 34.5 36.5 22.0 50.0 37.0 26.0 45.0 22.5 59.0 90.0 57.0 87.0 90.0 DAY 8 21 10 18 4 5 10 27 26 6 26 3 MONTHLY TOTAL PRECIPITATION IN MM. 163.0 152.5 132.5 238.0 103.0 79.5 126.5 72.0 229.5 275.0 165.0 374.5 2111.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 21.2 19.9 20.3 38.6 NO. OF DAYS WITH PRECIPITATION. 9 11 10 11 11 9 6 9 11 14 9 14 124 NO. OF DAYS PRECIPITATION EQUAL 9 11 10 11 11 9 6 9 11 14 9 14 124 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 6 5 6 9 4 3 4 3 8 8 6 9 71 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 83 74 78 75 76 75 77 80 79 78 80 78 78 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 69 65 67 68 63 57 63 65 68 65 64 68 65 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 73 70 72 72 69 61 67 68 71 70 68 72 69 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 3 4 0 0 0 0 0 7 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 5 3 5 0 0 0 0 0 0 0 0 0 13 DATE OF START AND END FREEZING START = 26 JAN. END = 14 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 9.5 6.8 10.2 13.3 15.9 19.5 22.2 22.4 20.8 16.8 8.9 8.4 14.6 AVERAGE OF MINIMUM TEMPERATURE IN C. 4.8 1.9 6.0 8.2 11.0 13.3 15.9 16.3 15.8 12.1 5.5 3.8 9.6 AVERAGE OF MAXIMUM TEMPERATURE IN C. 14.1 11.6 14.4 18.5 20.8 25.7 28.4 28.5 25.8 21.4 12.3 13.1 19.5 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.3 9.7 8.4 10.3 9.8 12.4 12.5 12.2 10.0 9.3 6.8 9.3 10.0 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.86 4.11 5.03 6.38 7.68 9.07 10.88 10.65 10.38 9.27 5.59 4.67 7.38 MEAN OF MIXING RATIO AT 09 GMT. 6.46 5.02 6.24 7.89 8.83 12.53 14.54 14.18 13.57 9.95 6.41 6.38 9.33 MEAN OF MIXING RATIO AT 15 GMT. 5.59 4.64 5.52 7.21 8.46 11.49 13.77 13.76 12.58 10.04 5.88 5.84 8.73 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -3.0 -7.5 2.5 2.5 8.5 11.5 13.0 12.0 13.0 9.5 1.0 -1.0 -7.5 DAY 16 18 1 14 14 1 8 27 30 9 14 7 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 29.5 15.5 19.5 22.5 26.5 30.5 33.4 30.5 31.5 31.5 19.0 22.5 33.4 DAY 28 1 31 16 19 16 22 5 29 1 8 22 24 HOUR MAXIMUM PRECIPITATION IN MM. 31.0 44.0 21.0 27.5 34.5 60.5 20.0 29.5 46.0 50.0 73.0 28.5 73.0 DAY 8 3 10 23 3 20 5 23 8 4 11 8 MONTHLY TOTAL PRECIPITATION IN MM. 202.0 264.5 115.0 54.5 107.0 215.5 84.5 55.5 225.0 269.0 530.0 113.5 2236.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 26.0 16.9 16.3 40.8 NO. OF DAYS WITH PRECIPITATION. 16 13 11 9 15 12 9 6 13 12 23 11 150 NO. OF DAYS PRECIPITATION EQUAL 16 13 11 9 15 12 9 6 13 12 23 11 150 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 9 10 6 1 3 6 3 1 8 10 15 4 76 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 74 79 71 78 79 75 77 77 81 91 90 87 80 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 69 63 66 66 63 65 64 62 70 70 77 73 67 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 69 69 68 72 72 71 72 70 76 81 82 80 74 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 2 0 0 0 0 0 0 0 0 0 0 2 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 2 11 4 1 1 0 0 19 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 3 7 0 0 0 0 0 0 0 0 0 1 11 DATE OF START AND END FREEZING START = 7 DEC. END = 23 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 9.5 6.7 12.6 16.1 19.0 19.8 24.6 22.1 18.8 15.6 10.7 6.9 15.2 AVERAGE OF MINIMUM TEMPERATURE IN C. 4.0 1.8 7.5 9.6 12.9 14.7 18.6 15.4 10.8 8.5 3.8 3.1 9.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 15.0 11.6 17.8 22.6 25.0 24.9 30.6 28.8 26.8 22.7 17.6 10.8 21.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.0 9.8 10.3 13.0 12.1 10.2 12.0 13.4 16.0 14.2 13.8 7.7 12.0 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.83 4.19 5.89 7.06 9.23 9.75 13.12 14.19 11.54 10.04 7.63 5.06 8.54 MEAN OF MIXING RATIO AT 09 GMT. 6.93 5.74 8.48 11.18 12.64 12.75 14.14 16.44 14.22 10.85 8.38 5.42 10.60 MEAN OF MIXING RATIO AT 15 GMT. 6.45 5.27 7.63 10.01 11.67 11.89 14.57 16.20 13.36 10.68 8.19 5.65 10.13 ABSOLUTE OF MINIMUM TEMPERATURE IN C. 1.0 -3.0 5.5 7.5 9.5 11.5 12.5 12.0 7.0 6.0 0.5 -3.0 -3.0 DAY 22 4 2 4 6 29 9 4 10 9 11 8 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 25.5 22.5 29.5 30.5 30.5 29.5 38.5 32.0 28.5 33.0 23.0 21.5 38.5 DAY 30 5 29 25 29 12 9 15 3 19 2 14 24 HOUR MAXIMUM PRECIPITATION IN MM. 61.0 22.5 11.0 16.0 22.0 109.0 0.0 13.5 11.5 111.0 84.0 18.0 111.0 DAY 5 14 12 2 17 27 ** 6 3 20 5 20 MONTHLY TOTAL PRECIPITATION IN MM. 125.0 176.0 72.5 59.0 86.5 341.5 0.0 30.0 23.0 299.4 273.2 100.5 1586.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 23.5 30.7 3.3 42.4 NO. OF DAYS WITH PRECIPITATION. 12 18 15 9 7 12 0 6 5 13 14 11 122 NO. OF DAYS PRECIPITATION EQUAL 12 18 15 9 7 12 0 5 5 13 14 11 121 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 10 2 3 4 8 0 2 1 6 7 4 49 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 87 87 78 81 81 79 83 87 89 89 93 91 85 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 69 71 71 70 70 70 61 71 68 70 76 75 70 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 78 78 75 75 74 74 73 81 82 84 85 88 79 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 6 3 0 0 0 0 9 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 1 1 0 16 9 0 1 0 0 28 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 0 8 0 0 0 0 0 0 0 0 0 5 13 DATE OF START AND END FREEZING START = 6 DEC. END = 21 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 8.0 7.8 9.6 15.5 19.8 23.7 25.0 25.8 23.0 16.7 15.0 8.6 16.6 AVERAGE OF MINIMUM TEMPERATURE IN C. 3.4 3.3 4.9 9.8 14.4 18.5 20.9 21.8 18.5 13.1 9.5 4.2 11.9 AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.6 12.2 14.3 21.2 25.3 29.0 29.5 30.1 27.5 20.4 20.6 13.0 21.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.2 8.9 9.4 11.4 10.9 10.5 8.6 8.3 9.0 7.3 11.1 8.8 9.4 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 5.32 5.38 5.74 7.62 10.76 13.10 14.65 16.52 13.92 9.88 7.37 4.89 9.60 MEAN OF MIXING RATIO AT 09 GMT. 5.59 5.89 6.40 8.67 11.54 13.67 14.40 17.65 16.42 10.63 8.33 5.14 10.36 MEAN OF MIXING RATIO AT 15 GMT. 5.82 5.57 6.47 8.47 11.09 13.51 14.57 17.60 15.66 10.85 8.21 5.50 10.28 ABSOLUTE OF MINIMUM TEMPERATURE IN C. 0.0 -1.5 0.5 4.5 10.0 14.0 18.5 19.6 13.0 9.6 3.6 -0.6 -1.5 DAY 23 26 7 9 9 1 12 31 23 26 26 21 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 22.0 19.5 23.5 31.0 30.0 35.5 33.5 33.0 32.0 30.0 32.5 22.8 35.5 DAY 3 10 31 20 7 21 13 3 12 3 8 22 24 HOUR MAXIMUM PRECIPITATION IN MM. 12.5 29.0 12.0 36.0 8.0 16.5 24.5 19.0 121.0 61.0 12.0 27.0 121.0 DAY 20 5 17 25 6 22 6 15 26 12 11 8 MONTHLY TOTAL PRECIPITATION IN MM. 51.0 79.0 46.5 61.0 27.0 39.0 27.5 55.5 284.0 261.5 14.0 95.5 1041.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 16.9 12.2 35.2 35.6 NO. OF DAYS WITH PRECIPITATION. 8 8 7 7 7 7 2 7 9 12 2 13 89 NO. OF DAYS PRECIPITATION EQUAL 8 8 7 7 7 7 2 7 8 11 2 13 87 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 3 2 2 0 1 1 2 4 7 1 3 27 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 93 95 95 88 88 84 83 95 96 97 89 90 91 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 72 79 72 68 62 60 59 69 75 77 62 64 68 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 85 79 82 74 74 68 70 81 86 91 77 81 79 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 3 15 23 7 0 0 0 48 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 1 2 11 8 18 13 1 1 0 55 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 1 1 0 0 0 0 0 0 0 0 0 5 7 DATE OF START AND END FREEZING START = 19 DEC. END = 26 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 6.1 7.5 7.2 12.3 19.7 21.8 25.4 25.8 23.6 18.6 12.8 12.6 16.1 AVERAGE OF MINIMUM TEMPERATURE IN C. 3.5 4.2 4.9 8.5 14.8 17.8 20.7 21.1 19.3 14.2 9.3 7.7 12.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.8 11.0 9.5 16.0 24.7 25.8 30.1 30.6 27.8 23.0 16.4 17.5 20.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 5.3 6.8 4.6 7.5 9.9 8.0 9.4 9.5 8.5 8.8 7.1 9.8 7.9 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.83 4.91 5.20 6.84 10.69 12.48 15.10 15.37 13.70 10.69 7.59 6.38 9.48 MEAN OF MIXING RATIO AT 09 GMT. 5.28 5.24 5.36 7.27 11.54 12.67 15.72 15.77 14.78 11.02 8.18 7.14 10.00 MEAN OF MIXING RATIO AT 15 GMT. 5.32 5.33 5.41 6.95 11.17 12.76 16.67 16.05 15.29 10.96 8.12 6.76 10.07 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -2.0 -2.6 -1.6 3.0 8.2 13.6 16.6 17.0 15.0 8.6 3.8 3.6 -2.6 DAY 16 4 2 7 3 8 16 26 26 21 20 5 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 14.0 29.5 16.5 27.0 31.0 33.5 33.5 34.0 39.5 35.5 20.0 25.0 39.5 DAY 4 9 7 30 17 30 20 7 30 25 6 26 24 HOUR MAXIMUM PRECIPITATION IN MM. 31.5 63.0 39.5 90.4 5.0 22.0 13.0 5.5 46.0 37.0 98.5 17.0 98.5 DAY 13 2 15 26 21 12 30 30 20 7 12 12 MONTHLY TOTAL PRECIPITATION IN MM. 111.5 141.5 160.8 208.9 17.5 90.0 24.5 14.0 141.0 154.5 179.0 32.0 1275.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 32.4 24.8 14.1 28.7 NO. OF DAYS WITH PRECIPITATION. 12 15 17 13 8 14 4 5 12 11 10 5 126 NO. OF DAYS PRECIPITATION EQUAL 11 13 16 13 5 13 4 3 11 11 10 5 115 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 5 3 8 5 0 3 1 0 7 7 3 2 44 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 95 92 94 93 86 88 83 90 92 94 96 91 91 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 81 76 80 73 66 68 63 62 70 72 74 70 71 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 91 86 86 80 75 78 75 74 84 84 87 78 82 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 2 14 19 9 0 0 0 44 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 1 0 0 0 0 0 0 0 0 0 0 1 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 2 3 20 21 9 2 0 0 57 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 6 5 3 0 0 0 0 0 0 0 0 0 14 DATE OF START AND END FREEZING START = 10 JAN. END = 20 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 8.8 5.8 8.2 15.4 19.8 23.5 24.8 26.0 20.3 20.2 12.9 9.5 16.3 AVERAGE OF MINIMUM TEMPERATURE IN C. 4.6 1.5 3.7 9.6 14.4 19.9 21.5 22.0 17.1 15.5 9.1 5.0 12.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.9 10.1 12.7 21.4 25.0 27.2 28.1 30.1 23.5 24.8 16.7 14.4 20.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.3 8.6 9.0 11.8 10.6 7.3 6.6 8.1 6.4 9.3 7.6 9.4 8.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 5.32 4.22 5.02 6.94 10.69 14.95 16.09 16.42 12.40 11.63 7.44 5.61 9.73 MEAN OF MIXING RATIO AT 09 GMT. 5.58 4.78 5.23 8.09 11.31 16.03 16.58 16.70 13.22 13.78 8.36 6.60 10.52 MEAN OF MIXING RATIO AT 15 GMT. 5.97 4.72 5.58 7.58 11.43 15.44 16.73 17.06 13.47 13.29 8.24 6.72 10.52 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -2.6 -3.4 -2.0 2.0 9.0 16.0 17.6 19.0 12.4 11.0 4.6 -1.2 -3.4 DAY 30 3 10 12 3 4 8 31 17 31 15 29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 25.5 18.5 28.0 34.0 31.5 31.5 32.5 33.0 32.5 33.0 22.5 22.2 34.0 DAY 7 16 24 24 26 20 30 5 2 13 5 6 24 HOUR MAXIMUM PRECIPITATION IN MM. 29.5 16.0 41.0 20.5 6.0 46.0 33.0 4.0 47.5 65.0 49.0 61.0 65.0 DAY 17 7 8 11 4 23 7 7 6 31 24 11 MONTHLY TOTAL PRECIPITATION IN MM. 111.0 106.6 174.0 20.5 10.5 138.1 164.0 9.5 327.5 157.5 133.0 137.0 1489.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 26.3 11.4 33.6 28.7 NO. OF DAYS WITH PRECIPITATION. 9 18 11 1 3 15 9 4 16 6 9 9 110 NO. OF DAYS PRECIPITATION EQUAL 9 18 11 1 3 14 9 3 16 6 9 9 108 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 4 3 6 1 0 4 7 0 11 3 5 4 48 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 95 92 91 83 90 93 93 92 97 95 96 96 93 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 69 74 70 60 62 76 76 69 80 76 77 73 72 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 86 84 84 72 80 84 84 80 91 91 90 90 85 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 9 21 26 1 0 0 0 57 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 1 1 3 11 21 2 3 0 0 42 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 4 10 4 0 0 0 0 0 0 0 0 1 19 DATE OF START AND END FREEZING START = 29 DEC. END = 22 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 6.0 5.6 10.7 16.0 19.5 24.9 25.4 26.4 21.7 18.0 14.8 10.7 16.6 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.6 0.9 6.2 10.7 14.2 19.4 20.6 21.9 18.8 13.7 11.1 7.2 12.3 AVERAGE OF MAXIMUM TEMPERATURE IN C. 9.4 10.3 15.3 21.3 24.8 30.3 30.2 30.8 24.7 22.3 18.5 14.1 21.0 DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.8 9.4 9.1 10.6 10.6 10.9 9.6 8.9 5.9 8.6 7.4 6.9 8.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.49 4.02 5.67 8.22 11.29 14.24 15.02 16.00 13.51 9.99 8.56 6.58 9.80 MEAN OF MIXING RATIO AT 09 GMT. 5.09 4.77 5.12 9.64 13.57 14.77 15.67 16.30 14.42 11.14 9.55 7.32 10.61 MEAN OF MIXING RATIO AT 15 GMT. 5.22 4.76 6.52 9.42 12.68 15.00 15.75 17.39 14.54 11.41 9.53 7.17 10.78 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -1.6 -3.6 0.1 4.4 7.0 15.4 15.4 19.0 15.4 8.8 7.4 3.2 -3.6 DAY 14 2 3 2 4 18 26 23 29 14 25 24 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 13.5 26.5 25.5 30.0 32.0 35.5 33.0 34.0 32.6 32.0 26.2 26.0 35.5 DAY 15 7 25 11 22 22 25 4 1 1 15 10 24 HOUR MAXIMUM PRECIPITATION IN MM. 34.0 52.5 15.5 7.0 10.0 18.0 18.5 17.5 33.5 96.0 34.2 56.0 96.0 DAY 9 27 18 28 1 25 8 14 11 7 4 2 MONTHLY TOTAL PRECIPITATION IN MM. 157.5 178.7 33.0 24.3 39.5 24.5 51.5 45.1 180.8 242.9 153.8 152.7 1284.3 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 28.7 6.9 21.6 42.8 NO. OF DAYS WITH PRECIPITATION. 13 8 6 8 10 4 5 11 14 9 15 13 116 NO. OF DAYS PRECIPITATION EQUAL 13 7 6 8 10 4 5 7 12 9 14 11 106 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 6 5 1 0 1 1 3 1 7 5 6 4 40 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 92 94 91 90 93 83 86 90 94 93 95 95 91 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 80 74 57 67 76 59 63 62 78 71 78 80 70 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 92 86 85 82 86 74 73 76 89 87 90 90 84 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 4 12 26 4 0 0 0 46 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 1 2 19 22 23 1 1 0 0 69 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 7 15 0 0 0 0 0 0 0 0 0 0 22 DATE OF START AND END FREEZING START = 4 JAN. END = 28 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 8.2 11.3 10.1 13.9 17.4 22.1 24.4 27.7 22.1 18.4 11.8 10.4 16.5 AVERAGE OF MINIMUM TEMPERATURE IN C. 3.3 5.0 6.2 9.0 12.7 17.0 19.4 23.2 18.4 14.1 7.4 5.0 11.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 13.1 17.5 14.0 18.8 22.1 27.2 29.3 32.2 25.8 22.8 16.2 15.7 21.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.8 12.5 7.8 9.8 9.4 10.2 9.9 9.0 7.4 8.7 8.8 10.7 9.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 5.26 5.57 6.17 7.54 10.16 12.43 14.43 18.01 13.51 10.93 6.71 5.91 9.72 MEAN OF MIXING RATIO AT 09 GMT. 5.46 5.73 6.65 7.71 10.64 12.91 15.19 18.23 13.86 11.27 7.15 6.44 10.10 MEAN OF MIXING RATIO AT 15 GMT. 5.82 5.76 6.69 8.11 10.54 12.58 15.14 19.33 14.43 11.92 7.27 6.46 10.34 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -1.0 0.0 0.6 5.6 7.0 13.6 15.2 19.4 12.6 8.6 0.2 1.0 -1.0 DAY 23 1 19 10 22 18 15 31 29 28 30 2 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 19.4 26.6 22.0 27.6 27.6 31.0 33.0 36.6 31.0 32.2 28.4 24.4 36.6 DAY 11 20 20 19 18 14 31 24 2 16 19 28 24 HOUR MAXIMUM PRECIPITATION IN MM. 36.0 12.1 50.5 21.5 27.0 4.6 29.0 42.7 63.7 55.5 29.5 49.1 63.7 DAY 1 4 17 6 20 17 12 31 16 25 10 16 MONTHLY TOTAL PRECIPITATION IN MM. 110.7 15.1 70.8 109.9 108.6 6.1 68.3 81.6 246.1 267.9 147.3 87.1 1319.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 14.9 17.0 30.0 38.1 NO. OF DAYS WITH PRECIPITATION. 8 3 11 10 11 2 6 6 12 13 13 6 101 NO. OF DAYS PRECIPITATION EQUAL 8 3 9 10 10 2 4 6 12 13 11 6 94 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 4 1 1 6 4 0 2 2 8 8 6 3 45 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 93 85 93 92 91 84 86 91 93 94 92 91 90 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 67 60 73 65 70 61 64 65 71 69 72 66 67 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 82 69 85 79 81 70 72 81 85 88 86 84 80 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 1 6 30 5 0 0 0 42 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 1 17 26 3 1 0 0 48 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 3 1 0 0 0 0 0 0 0 0 0 0 4 DATE OF START AND END FREEZING START = 3 JAN. END = 1 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 7.8 7.2 8.9 17.2 18.2 21.6 26.1 26.6 22.6 16.0 11.9 9.5 16.1 AVERAGE OF MINIMUM TEMPERATURE IN C. 4.1 2.3 4.1 11.4 13.7 16.4 20.4 21.9 19.2 13.0 8.6 5.5 11.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 11.5 12.2 13.6 23.0 22.8 26.8 31.7 31.2 26.0 19.0 15.1 13.5 20.5 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.4 9.9 9.5 11.6 9.1 10.4 11.3 9.3 6.8 6.0 6.5 8.0 8.8 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.88 4.66 5.32 9.05 10.31 12.22 15.21 15.95 14.47 10.04 7.57 5.98 9.64 MEAN OF MIXING RATIO AT 09 GMT. 5.17 5.62 5.73 9.74 10.93 12.43 15.44 15.67 14.64 10.38 8.05 6.32 10.01 MEAN OF MIXING RATIO AT 15 GMT. 5.11 5.50 5.67 9.96 10.93 12.38 15.36 17.14 15.12 10.40 7.96 6.55 10.17 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -0.6 -2.4 -1.0 6.0 10.6 9.4 17.6 18.6 17.0 8.2 4.4 1.4 -2.4 DAY 31 9 4 2 11 14 5 13 12 29 12 29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 23.0 22.0 22.6 32.0 29.4 31.4 35.0 36.0 32.6 24.0 19.4 22.6 36.0 DAY 26 23 19 7 26 6 29 1 8 7 26 21 24 HOUR MAXIMUM PRECIPITATION IN MM. 24.0 47.8 34.0 6.5 24.0 22.0 0.0 69.0 76.0 70.0 117.5 52.0 117.5 DAY 28 7 24 21 4 12 ** 30 11 1 6 9 MONTHLY TOTAL PRECIPITATION IN MM. 161.5 130.4 160.3 11.5 62.1 37.7 0.0 106.6 190.3 247.1 324.0 167.7 1599.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 28.3 7.0 18.6 46.2 NO. OF DAYS WITH PRECIPITATION. 17 10 14 3 10 7 0 9 17 18 16 15 136 NO. OF DAYS PRECIPITATION EQUAL 17 9 13 3 9 7 0 8 16 18 16 14 130 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 7 6 7 0 1 1 0 2 4 8 9 5 50 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 88 90 88 91 89 85 82 87 93 94 95 93 90 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 71 72 67 61 75 62 56 60 75 80 79 73 69 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 81 84 78 79 81 74 67 76 87 91 90 88 81 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 13 25 3 0 0 0 41 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 1 0 6 26 23 3 0 0 0 59 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 3 5 4 0 0 0 0 0 0 0 0 0 12 DATE OF START AND END FREEZING START = 22 JAN. END = 17 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 6.6 9.4 12.0 15.1 19.3 22.7 24.9 26.1 22.9 17.7 13.5 11.2 16.8 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.9 4.0 6.3 9.9 14.6 17.8 20.1 21.3 19.1 14.2 8.8 7.4 12.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 10.3 14.7 17.7 20.2 23.9 27.6 29.7 30.9 26.7 21.2 18.2 14.9 21.4 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.4 10.7 11.4 10.3 9.3 9.8 9.6 9.6 7.6 7.0 9.4 7.5 9.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.94 5.23 6.30 8.29 11.25 12.98 14.49 15.87 14.41 10.80 7.88 6.40 9.90 MEAN OF MIXING RATIO AT 09 GMT. 5.47 5.58 6.97 9.15 12.02 13.01 14.88 15.82 14.93 11.32 8.34 6.85 10.36 MEAN OF MIXING RATIO AT 15 GMT. 5.46 5.82 7.03 9.21 12.01 13.19 15.23 17.54 15.23 11.22 8.33 6.81 10.59 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -5.2 -0.8 0.2 4.8 10.0 14.0 16.4 16.0 15.2 8.0 0.2 0.0 -5.2 DAY 28 12 12 11 27 1 19 13 21 27 19 22 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 18.0 25.0 30.4 27.8 29.2 32.8 34.0 35.0 31.0 27.0 26.0 29.4 35.0 DAY 10 28 29 24 15 22 27 3 9 6 15 29 24 HOUR MAXIMUM PRECIPITATION IN MM. 57.7 11.0 38.0 9.2 27.9 4.5 27.5 17.2 49.5 88.8 75.2 26.5 88.8 DAY 24 22 25 9 25 29 18 11 6 1 18 2 MONTHLY TOTAL PRECIPITATION IN MM. 208.5 31.9 89.3 28.7 75.5 7.4 45.6 44.7 168.5 322.7 258.9 91.5 1373.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 24.0 8.1 18.8 49.0 NO. OF DAYS WITH PRECIPITATION. 14 8 11 9 13 3 6 8 11 16 13 14 126 NO. OF DAYS PRECIPITATION EQUAL 12 7 7 6 9 2 4 7 10 15 13 13 105 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 5 1 4 0 2 0 2 1 4 6 7 3 35 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 94 88 90 93 92 85 83 90 95 95 94 91 91 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 76 65 66 69 70 60 61 61 73 77 70 76 69 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 89 81 81 85 84 73 73 80 87 87 86 84 83 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 2 0 0 0 0 0 0 0 0 0 0 0 2 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 2 11 20 8 0 0 0 41 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 1 0 0 5 19 23 2 0 0 0 50 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 9 3 0 0 0 0 0 0 0 0 0 1 13 DATE OF START AND END FREEZING START = 22 DEC. END = 14 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 7.6 9.8 12.6 13.2 16.9 22.6 26.1 25.9 24.1 20.8 14.1 5.5 16.6 AVERAGE OF MINIMUM TEMPERATURE IN C. 3.6 4.2 7.0 10.3 12.9 17.8 20.8 21.7 19.4 16.5 9.7 2.2 12.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 11.5 15.3 18.1 16.1 20.9 27.4 31.4 30.0 28.9 25.1 18.4 8.9 21.0 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.9 11.1 11.1 5.8 8.0 9.6 10.6 8.3 9.5 8.6 8.7 6.7 8.8 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.75 5.17 6.34 7.82 9.80 12.85 14.45 15.67 13.90 11.81 7.76 4.61 9.58 MEAN OF MIXING RATIO AT 09 GMT. 5.49 5.40 6.60 8.08 10.12 12.61 14.81 15.49 14.13 12.85 8.77 4.98 9.94 MEAN OF MIXING RATIO AT 15 GMT. 5.48 6.07 6.97 8.12 10.33 12.75 15.61 16.23 15.34 13.38 8.95 5.13 10.36 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -2.0 -1.6 0.0 6.0 8.4 13.8 16.4 18.2 15.6 11.0 1.0 -1.4 -2.0 DAY 13 19 7 14 2 8 2 14 10 24 30 28 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 23.6 28.2 31.2 23.8 30.0 31.4 35.4 34.4 31.0 31.4 27.2 18.4 35.4 DAY 2 26 27 6 30 24 14 4 12 2 4 31 24 HOUR MAXIMUM PRECIPITATION IN MM. 16.2 21.0 41.8 25.0 16.0 1.6 7.4 21.2 43.4 110.4 69.5 48.2 110.4 DAY 12 16 18 13 10 20 22 27 20 22 14 2 MONTHLY TOTAL PRECIPITATION IN MM. 68.2 86.0 86.9 145.7 87.9 2.8 22.0 56.8 63.4 191.4 268.8 297.4 1377.3 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 17.5 17.2 10.3 55.0 NO. OF DAYS WITH PRECIPITATION. 10 7 12 19 14 2 6 11 5 16 14 19 135 NO. OF DAYS PRECIPITATION EQUAL 10 7 11 16 12 2 5 8 5 14 12 18 120 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 4 2 5 3 0 0 1 2 3 5 9 36 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 90 89 92 94 92 86 86 90 94 96 95 95 92 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 73 59 63 78 71 60 56 63 62 71 73 79 67 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 86 79 76 86 81 65 64 74 75 84 85 88 79 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 2 18 22 4 1 0 0 47 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 1 0 1 5 24 21 14 2 0 0 68 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 5 4 1 0 0 0 0 0 0 0 0 9 19 DATE OF START AND END FREEZING START = 14 DEC. END = 7 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 8.6 7.6 7.2 12.1 18.0 21.3 24.3 25.4 21.7 20.5 13.1 10.3 15.8 AVERAGE OF MINIMUM TEMPERATURE IN C. 3.8 4.3 4.3 7.8 11.9 16.9 20.0 20.4 18.1 15.6 9.3 5.8 11.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 13.3 11.0 10.1 16.5 24.1 25.7 28.7 30.4 25.4 25.3 16.9 14.8 20.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.5 6.7 5.8 8.7 12.2 8.8 8.7 10.0 7.3 9.7 7.6 9.0 8.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.92 4.93 5.22 6.33 9.32 12.35 14.08 14.99 13.04 11.22 7.43 5.46 9.11 MEAN OF MIXING RATIO AT 09 GMT. 5.36 5.18 5.65 7.08 10.12 12.59 14.40 15.43 13.43 11.96 8.01 5.50 9.56 MEAN OF MIXING RATIO AT 15 GMT. 5.65 5.26 5.71 7.16 9.73 12.72 14.63 16.33 13.81 12.76 8.28 6.15 9.85 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -1.4 -2.4 -1.4 1.8 3.6 10.4 15.2 14.2 15.0 13.0 1.6 0.0 -2.4 DAY 18 18 3 30 2 7 31 1 23 6 24 11 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 25.0 26.4 14.0 32.0 30.4 29.4 33.0 34.0 33.2 31.6 23.4 29.0 34.0 DAY 7 3 22 9 30 18 7 11 4 24 21 18 24 HOUR MAXIMUM PRECIPITATION IN MM. 15.2 30.4 33.0 42.7 56.4 62.2 16.7 12.1 63.7 48.0 83.4 84.0 84.0 DAY 16 28 13 17 24 6 24 25 20 20 14 11 MONTHLY TOTAL PRECIPITATION IN MM. 56.6 142.0 167.2 141.3 83.9 87.2 26.8 45.7 250.4 78.3 319.2 278.4 1677.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 21.8 18.6 19.3 40.3 NO. OF DAYS WITH PRECIPITATION. 11 17 20 10 8 5 5 9 16 9 14 14 138 NO. OF DAYS PRECIPITATION EQUAL 9 15 18 9 7 5 5 7 15 8 13 14 125 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 5 5 5 2 2 1 2 5 2 9 8 47 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 89 91 95 88 94 93 89 93 95 95 95 89 92 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 68 75 80 72 60 66 63 62 73 66 74 65 69 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 79 82 86 79 64 75 70 73 81 82 86 79 78 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 11 13 2 0 0 0 26 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 1 1 0 10 21 6 2 0 0 41 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 2 2 4 0 0 0 0 0 0 0 0 4 12 DATE OF START AND END FREEZING START = 11 DEC. END = 31 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE PERIOD 1964 TO 2003 PAGE 1 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPE. IN C. 7.4 7.6 9.5 14.2 18.5 22.4 24.7 24.8 22.0 18.0 13.6 10.1 16.1 SD OF MEAN DAILY TEMPERATURE IN C. 2.08 2.32 2.12 1.78 1.81 1.47 1.66 1.79 1.83 1.69 2.22 2.50 1.94 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.8 2.6 4.7 8.6 12.9 16.8 19.3 19.6 17.2 13.3 8.8 5.1 11.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.2 12.5 14.2 19.9 24.1 28.0 30.3 30.0 26.8 22.6 18.5 15.0 21.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.4 9.9 9.5 11.2 11.2 11.2 11.0 10.3 9.6 9.2 9.6 9.8 10.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.54 4.52 5.34 7.15 9.85 12.50 14.20 14.58 12.62 9.86 7.19 5.42 8.98 MEAN OF MIXING RATIO AT 09 GMT. 5.42 5.43 6.26 8.38 11.12 13.55 15.24 15.74 14.01 11.24 8.52 6.53 10.11 MEAN OF MIXING RATIO AT 15 GMT. 5.18 5.19 5.97 7.93 10.43 13.06 14.89 15.45 13.58 11.01 8.10 6.27 9.75 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -8.0 -9.0 -6.0 0.0 2.0 8.0 5.0 8.0 5.0 2.0 0.0 -5.0 -9.0 YEAR - DAY 73-24 72-10 85-11 74-11 74- 2 65- 1 65-24 65- 5 65-30 74-27 72-29 72-28 72-10 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 30.0 30.0 34.5 36.5 37.5 37.0 38.5 37.0 39.5 35.5 32.5 31.0 39.5 YEAR - DAY 79- 4 73-19 88- 4 86-15 87-23 80- 4 94- 9 71-26 96-30 96-25 79- 3 65-15 96-30 24 HOUR MAXIMUM PRECIPITATION IN MM. 61.0 64.5 103.0 90.4 58.0 137.0 79.0 100.0 148.0 204.0 117.5 181.0 204.0 YEAR - DAY 94- 5 89-13 67-29 96-26 77-21 77-27 74- 6 88- 4 69-11 85-11 0- 6 79-16 85-11 MONTHLY TOTAL PRECIPITATION IN MM. 126.0 117.8 126.1 76.1 57.1 59.0 50.2 68.7 166.6 232.3 187.7 163.2 1430.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 25.8 13.4 20.0 40.8 NO. OF DAYS WITH PRECIPITATION. 11 10 11 8 7 5 4 6 10 12 11 11 106 NO. OF DAYS PRECIPITATION EQUAL 11 10 11 7 7 5 4 6 10 12 11 11 105 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 5 4 5 3 2 2 2 2 5 6 6 5 47 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 86 86 86 85 85 83 82 86 88 89 86 84 86 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 71 71 73 68 67 63 62 66 72 74 73 72 69 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 79 78 78 75 74 71 71 74 79 82 81 81 77 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 1 1 0 0 0 0 0 0 0 0 0 0 2 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 2 10 12 2 0 0 0 26 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 1 2 9 19 18 7 1 1 0 58 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 7 5 3 0 0 0 0 0 0 0 0 2 17 DATE OF START AND END FREEZING START = 29 NOV. END = 11 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION LAHIJAN LATITUDE 37 11 N DATA PROCESSING CENTER LONGITUDE 50 0 E ELEVATION -2 MET. MEAN AND EXTREMES FOR THE PERIOD 1964 TO 2003 PAGE 2 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE DRY BULB TEMPERATURE. IN C. 7.6 7.6 9.6 14.6 19.2 23.5 25.8 25.4 22.3 18.2 13.9 10.0 16.5 AVERAGE DEW POINT TEMPERATURE. IN C. 3.7 3.6 5.7 10.0 14.4 17.9 19.9 20.4 18.3 14.8 10.1 6.1 12.1 AVERAGE OF MIXING RATIO IN G/KG 5.07 5.04 5.86 7.81 10.46 13.03 14.75 15.26 13.40 10.71 7.93 6.07 9.62 AVERAGE OF VAPOUR PRESSURE HPA 8.20 8.14 9.45 12.56 16.75 20.78 23.46 24.25 21.36 17.14 12.75 9.78 15.38 AVERAGE OF SATURATION DEFICIT IN HPA 2.76 2.85 2.99 4.77 6.16 8.90 10.34 8.98 6.25 4.36 3.70 3.06 5.42 AVERAGE RELATIVE HUMIDITY IN PERCENT 79 78 79 76 76 72 72 75 80 82 80 79 77 AVERAGE OF MAXIMUM RELATIVE HUMIDITY(%) 89 89 89 87 87 84 84 87 90 91 90 89 88 AVERAGE OF MINIMUM RELATIVE HUMIDITY(%) 68 68 69 66 65 61 61 64 69 72 70 69 67 NO. OF DAYS PRECIPITATION EQUAL 7 7 7 4 3 3 3 4 7 9 8 8 70 OR MORE THAN 5 MM.