IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 1 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF MEAN DAILY TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MAX-MIN 1961 2.8 4.0 7.8 13.4 22.6 26.2 29.9 26.8 24.1 17.0 10.3 7.0 27.1 1962 4.2 6.8 12.2 13.3 20.6 25.0 28.7 26.6 22.3 17.4 8.9 6.1 24.5 1963 7.5 8.3 9.3 15.9 17.7 26.0 29.8 28.3 25.2 19.1 10.3 2.8 27.0 1964 -3.7 4.6 11.7 13.3 21.6 27.1 30.3 29.4 24.6 16.0 9.4 0.9 34.0 1965 0.5 4.5 9.5 13.7 22.3 26.0 28.8 28.3 23.4 17.2 12.0 6.3 28.3 1966 8.2 8.5 9.8 15.0 20.8 27.6 28.7 29.1 24.2 16.2 11.5 6.9 22.2 1967 4.1 2.6 8.1 12.6 20.5 25.0 29.3 29.2 24.5 17.3 11.3 5.0 26.7 1968 3.0 4.0 9.3 14.2 20.1 24.4 28.4 28.6 25.0 18.6 10.7 6.0 25.6 1969 -0.3 1.7 10.4 14.3 20.9 ****** 28.0 26.8 22.4 18.5 8.0 7.2 ****** 1970 2.8 7.6 9.6 17.7 22.1 27.2 28.8 29.6 24.3 18.1 13.9 4.7 26.8 1971 4.0 4.7 11.3 13.7 22.9 26.4 29.8 29.3 23.8 17.1 10.6 5.8 25.8 1972 -2.0 -1.1 6.2 15.9 16.8 25.3 28.7 25.5 24.9 20.3 11.0 0.9 30.7 1973 -1.2 6.4 9.0 14.4 20.2 27.1 29.5 28.9 24.0 19.4 9.6 3.7 30.7 1974 -0.8 0.4 9.8 13.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 5.8 ****** 11.5 ****** ****** 23.4 28.5 28.0 23.5 16.8 ****** 8.1 ****** 1982 3.9 1.8 7.5 18.0 21.3 26.1 27.8 26.7 23.0 17.0 8.0 2.3 26.0 1983 -0.1 3.9 ****** 13.7 20.6 25.9 29.7 29.0 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.1 2.8 8.3 16.5 19.6 26.0 29.4 29.0 24.6 17.9 11.7 4.5 26.6 1992 0.4 3.2 4.9 13.8 16.5 24.8 30.4 26.6 22.8 17.7 12.2 ****** ****** 1993 1.2 ****** 7.5 15.5 19.6 26.1 28.7 28.1 25.9 16.3 7.9 6.4 ****** 1994 5.3 4.9 11.2 16.9 20.2 26.3 30.1 30.3 22.3 16.6 11.6 3.2 27.1 1995 6.2 7.0 10.9 15.6 19.9 25.2 31.3 30.8 24.3 17.0 12.8 3.6 27.7 1996 1.8 5.9 6.2 13.9 21.2 26.7 28.6 28.9 26.5 17.4 10.6 7.8 27.1 1997 5.8 4.8 7.1 15.1 21.0 26.8 31.1 30.8 24.8 20.0 10.2 5.6 26.3 1998 1.9 4.2 9.3 17.1 20.5 27.9 29.6 29.1 25.2 18.9 15.0 10.4 27.7 1999 4.5 8.7 9.8 16.2 22.7 28.1 28.0 29.8 25.2 19.6 9.5 7.0 25.3 2000 4.3 5.6 9.5 19.3 24.2 27.5 29.3 29.6 26.2 16.7 9.2 5.6 25.3 MEAN 2.7 4.6 9.1 15.1 20.7 26.2 29.3 28.6 24.3 17.8 10.7 5.3 26.6 SD 2.95 2.49 1.84 1.74 1.78 1.15 0.90 1.38 1.15 1.23 1.78 2.30 1.72 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 2 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 -1.2 -0.5 2.5 8.2 16.8 20.1 24.6 21.4 18.6 11.6 5.0 2.2 10.8 1962 0.1 2.2 6.5 8.1 15.1 19.3 23.1 21.0 16.5 11.9 3.8 1.8 10.8 1963 2.9 3.6 3.9 10.5 12.3 20.0 24.2 22.7 19.4 14.0 5.5 -1.4 11.5 1964 -8.6 0.1 6.9 8.1 15.5 21.8 24.6 23.9 19.1 10.6 4.0 -3.7 10.2 1965 -2.5 0.0 5.0 8.8 16.7 20.2 23.3 22.9 18.1 12.7 7.4 1.6 11.2 1966 3.7 4.3 5.3 10.0 15.9 22.0 23.5 23.8 18.9 11.8 6.4 2.7 12.4 1967 0.0 -1.4 2.8 7.8 15.3 19.4 23.9 23.8 19.5 12.2 7.0 0.8 10.9 1968 -1.0 -0.2 5.3 9.7 14.9 18.5 22.9 23.1 19.3 13.6 6.9 2.5 11.3 1969 -3.6 -1.9 6.7 9.7 15.5 ****** 22.6 21.3 17.0 13.5 3.2 2.8 ****** 1970 -0.9 2.4 4.9 12.5 16.3 21.1 23.6 23.9 18.5 12.3 8.6 0.6 12.0 1971 -0.5 0.2 6.3 8.9 17.4 20.6 24.3 23.8 18.1 11.4 6.0 1.7 11.5 1972 -6.4 -6.1 1.4 10.1 11.3 19.2 23.0 19.8 19.2 14.5 5.7 -2.7 9.1 1973 -5.7 1.4 3.3 8.6 13.7 21.0 23.7 23.2 18.0 13.4 2.7 -1.4 10.2 1974 -4.6 -3.6 5.4 7.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 1.0 ****** 6.6 9.7 14.3 18.3 22.3 22.8 17.1 11.2 ****** 3.0 ****** 1982 -0.6 -3.3 2.9 12.5 15.8 20.3 22.2 21.5 17.2 11.3 4.6 -3.2 10.1 1983 -4.8 -1.3 ****** 8.5 15.2 19.9 23.8 23.9 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 0.1 -0.5 4.9 12.0 14.6 20.9 24.6 24.1 19.9 13.8 7.9 1.5 12.0 1992 -2.5 -0.1 1.3 9.4 12.3 19.8 25.8 21.9 17.8 12.9 8.3 ****** ****** 1993 -1.9 ****** 3.8 11.2 15.2 21.0 24.0 23.3 21.2 12.2 4.8 3.2 ****** 1994 2.1 1.5 7.4 12.3 15.3 21.1 25.2 25.5 17.7 12.6 8.2 0.0 12.4 1995 2.6 3.5 6.7 11.2 15.2 20.1 26.2 26.0 19.6 12.9 8.4 0.4 12.7 1996 -0.8 2.5 3.1 9.8 16.5 21.8 23.9 24.3 21.8 12.8 6.7 4.4 12.2 1997 2.4 0.7 3.3 10.7 16.4 22.0 26.4 26.1 20.2 15.7 7.3 2.7 12.8 1998 -0.9 0.9 5.5 12.6 15.9 23.2 24.7 24.4 20.7 14.6 11.0 7.1 13.3 1999 1.4 4.9 6.0 11.7 17.6 23.0 23.2 25.1 20.6 15.2 6.2 3.9 13.2 2000 1.2 1.7 5.2 14.8 19.3 22.4 24.6 24.9 21.7 13.0 6.2 3.1 13.2 MEAN -1.1 0.5 4.7 10.2 15.4 20.7 24.0 23.4 19.0 12.9 6.3 1.4 11.5 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 3 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF MAXIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 6.9 8.6 13.1 18.5 28.4 32.2 35.3 32.3 29.7 22.4 15.6 11.8 21.2 1962 8.3 11.5 17.9 18.6 26.1 30.7 34.3 32.1 28.1 22.9 13.9 10.4 21.2 1963 12.0 13.0 14.6 21.2 23.1 32.1 35.4 33.8 30.9 24.1 15.2 6.9 21.9 1964 1.2 9.2 16.5 18.5 27.6 32.5 36.0 34.9 30.1 21.5 14.7 5.4 20.7 1965 3.6 8.9 13.9 18.6 27.9 31.7 34.3 33.7 28.7 21.6 16.7 10.9 20.9 1966 12.7 12.8 14.3 19.9 25.6 33.2 34.0 34.4 29.5 20.6 16.6 11.1 22.1 1967 8.3 6.6 13.4 17.3 25.7 30.5 34.7 34.6 29.4 22.4 15.5 9.3 20.6 1968 7.0 8.2 13.4 18.8 25.3 30.2 33.9 34.0 30.8 23.7 14.5 9.5 20.8 1969 3.0 5.2 14.0 18.9 26.2 ****** 33.5 32.2 27.8 23.5 12.9 11.6 ****** 1970 6.5 12.7 14.3 22.9 27.8 33.3 34.0 35.2 30.0 23.9 19.1 8.8 22.4 1971 8.5 9.2 16.3 18.6 28.4 32.2 35.3 34.7 29.5 22.9 15.2 9.9 21.7 1972 2.3 3.9 11.1 21.7 22.3 31.5 34.5 31.1 30.5 26.1 16.4 4.6 19.7 1973 3.3 11.5 14.6 20.1 26.6 33.3 35.4 34.6 29.9 25.3 16.5 8.8 21.7 1974 2.9 4.3 14.2 18.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 9.6 ****** 17.3 ****** ****** 28.7 32.8 32.4 29.7 21.8 ****** 12.9 ****** 1982 8.3 6.9 12.3 23.6 26.7 31.7 33.5 32.0 28.9 22.5 11.6 6.4 20.4 1983 4.8 9.2 ****** 18.9 25.9 32.0 35.5 34.2 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 6.1 6.2 11.6 21.0 24.7 31.0 34.2 33.8 29.3 22.0 15.4 7.4 20.2 1992 3.3 6.6 8.4 18.2 20.7 29.8 35.1 31.3 27.7 22.5 16.2 ****** ****** 1993 4.3 ****** 11.2 19.8 24.0 31.1 33.4 32.8 30.7 20.5 11.0 9.5 ****** 1994 8.4 8.2 15.1 21.6 25.0 31.4 35.0 35.0 27.0 20.5 15.1 6.3 20.7 1995 9.9 10.5 15.1 19.9 24.6 30.3 36.3 35.6 29.0 21.2 17.1 6.7 21.4 1996 4.5 9.2 9.4 18.1 26.0 31.6 33.2 33.6 31.2 21.9 14.5 11.2 20.4 1997 9.2 8.9 11.0 19.5 25.6 31.7 35.7 35.6 29.3 24.3 13.1 8.5 21.0 1998 4.7 7.5 13.1 21.6 25.2 32.5 34.5 33.7 29.8 23.3 19.1 13.7 21.6 1999 7.6 12.5 13.6 20.7 27.8 33.2 32.9 34.5 29.9 24.0 12.8 10.2 21.6 2000 7.4 9.4 13.7 23.8 29.1 32.6 34.0 34.2 30.7 20.5 12.2 8.2 21.3 MEAN 6.5 8.8 13.6 20.0 25.8 31.6 34.5 33.7 29.5 22.6 15.0 9.2 20.9 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 4 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 8.1 9.1 10.6 10.3 11.6 12.1 10.7 10.9 11.1 10.8 10.6 9.6 10.5 1962 8.2 9.3 11.4 10.5 11.0 11.4 11.2 11.1 11.6 11.0 10.1 8.6 10.4 1963 9.1 9.4 10.7 10.7 10.8 12.1 11.2 11.1 11.5 10.1 9.7 8.3 10.4 1964 9.8 9.1 9.6 10.4 12.1 10.7 11.4 11.0 11.0 10.9 10.7 9.1 10.5 1965 6.1 8.9 8.9 9.8 11.2 11.5 11.0 10.8 10.6 8.9 9.3 9.3 9.7 1966 9.0 8.5 9.0 9.9 9.7 11.2 10.5 10.6 10.6 8.8 10.2 8.4 9.7 1967 8.3 8.0 10.6 9.5 10.4 11.1 10.8 10.8 9.9 10.2 8.5 8.5 9.7 1968 8.0 8.4 8.1 9.1 10.4 11.7 11.0 10.9 11.5 10.1 7.6 7.0 9.5 1969 6.6 7.1 7.3 9.2 10.7 ****** 10.9 10.9 10.8 10.0 9.7 8.8 ****** 1970 7.4 10.3 9.4 10.4 11.5 12.2 10.4 11.3 11.5 11.6 10.5 8.2 10.4 1971 9.0 9.0 10.0 9.7 11.0 11.6 11.0 10.9 11.4 11.5 9.2 8.2 10.2 1972 8.7 10.0 9.7 11.6 11.0 12.3 11.5 11.3 11.3 11.6 10.7 7.3 10.6 1973 9.0 10.1 11.3 11.5 12.9 12.3 11.7 11.4 11.9 11.9 13.8 10.2 11.5 1974 7.5 7.9 8.8 11.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 8.6 ****** 10.7 ****** ****** 10.4 10.5 9.6 12.6 10.6 ****** 9.9 ****** 1982 8.9 10.2 9.4 11.1 10.9 11.4 11.3 10.5 11.7 11.2 7.0 9.6 10.3 1983 9.6 10.5 ****** 10.4 10.7 12.1 11.7 10.3 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 6.0 6.7 6.7 9.0 10.1 10.1 9.6 9.7 9.4 8.2 7.5 5.9 8.2 1992 5.8 6.7 7.1 8.8 8.4 10.0 9.3 9.4 9.9 9.6 7.9 ****** ****** 1993 6.2 ****** 7.4 8.6 8.8 10.1 9.4 9.5 9.5 8.3 6.2 6.3 ****** 1994 6.3 6.7 7.7 9.3 9.7 10.3 9.8 9.5 9.3 7.9 6.9 6.3 8.3 1995 7.3 7.0 8.4 8.7 9.4 10.2 10.1 9.6 9.4 8.3 8.7 6.3 8.6 1996 5.3 6.7 6.3 8.3 9.5 9.8 9.3 9.3 9.4 9.1 7.8 6.8 8.1 1997 6.8 8.2 7.7 8.8 9.2 9.7 9.3 9.5 9.1 8.6 5.8 5.8 8.2 1998 5.6 6.6 7.6 9.0 9.3 9.3 9.8 9.3 9.1 8.7 8.1 6.6 8.2 1999 6.2 7.6 7.6 9.0 10.2 10.2 9.7 9.4 9.3 8.8 6.6 6.3 8.4 2000 6.2 7.7 8.5 9.0 9.8 10.2 9.4 9.3 9.0 7.5 6.0 5.1 8.1 MEAN 7.5 8.4 8.9 9.8 10.4 11.0 10.5 10.3 10.5 9.8 8.7 7.8 9.5 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 5 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 3.68 3.29 2.99 5.16 5.28 5.70 6.64 6.32 5.30 3.27 3.00 3.08 4.47 1962 3.16 3.30 3.21 5.24 5.88 6.62 6.99 6.53 3.95 3.99 3.58 3.81 4.69 1963 3.51 3.08 3.14 5.04 6.69 5.73 6.39 6.77 3.79 4.68 3.80 3.05 4.64 1964 1.19 2.98 3.88 3.65 3.94 5.51 6.61 5.25 4.24 3.03 3.00 2.78 3.84 1965 3.42 3.06 3.93 3.74 4.39 5.82 6.24 5.04 4.72 5.82 4.02 2.71 4.41 1966 3.46 3.10 3.79 4.97 5.70 4.99 6.25 4.98 4.76 6.34 3.08 3.07 4.54 1967 2.77 3.02 2.92 4.35 5.61 4.33 6.83 4.36 4.78 4.37 4.61 2.95 4.24 1968 3.05 2.95 3.88 5.14 6.55 6.63 6.02 5.74 3.65 4.52 5.51 4.02 4.81 1969 3.01 3.23 5.23 5.31 6.30 ****** 7.90 6.53 4.82 5.81 3.83 3.56 ****** 1970 3.22 3.03 3.61 4.48 5.13 5.05 7.77 6.51 4.76 3.09 3.90 3.08 4.47 1971 2.55 2.93 4.28 5.07 6.00 5.68 6.02 5.51 4.40 3.78 4.70 3.17 4.51 1972 2.75 2.86 3.92 4.87 6.36 7.14 6.64 6.09 3.78 3.99 3.62 3.03 4.59 1973 2.31 3.34 2.80 3.83 5.21 5.83 7.01 5.69 4.89 3.44 3.10 2.68 4.18 1974 2.78 2.96 4.74 4.29 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 4.96 ****** 8.22 10.83 14.19 16.21 21.02 19.14 13.12 8.79 ****** 5.12 ****** 1982 4.25 3.69 5.44 10.28 13.90 15.11 12.83 14.36 10.25 9.09 6.12 3.39 9.06 1983 3.22 4.03 ****** 7.71 11.10 13.06 15.20 15.15 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.40 3.04 4.58 4.51 5.33 5.78 6.47 5.93 5.58 5.23 3.84 3.42 4.76 1992 2.62 2.58 3.25 4.41 6.10 6.10 6.47 6.59 4.22 3.92 3.92 ****** ****** 1993 2.57 ****** 3.12 4.53 5.49 5.31 6.86 6.66 5.22 4.06 5.16 4.10 ****** 1994 3.87 3.07 3.86 4.72 5.39 5.75 6.53 5.52 4.89 5.98 5.23 2.99 4.82 1995 3.40 3.45 3.35 5.11 5.62 6.42 6.58 6.06 5.54 4.52 2.93 3.05 4.67 1996 3.09 4.07 4.06 4.99 6.65 6.23 6.39 6.29 4.81 4.85 3.66 3.38 4.87 1997 2.87 2.18 3.36 3.74 4.40 6.46 7.32 5.16 4.83 4.80 5.12 4.27 4.54 1998 3.22 3.41 3.99 5.07 6.32 7.75 10.16 8.94 6.98 5.59 4.65 4.58 5.89 1999 3.99 3.41 3.68 5.62 6.19 6.98 9.39 8.04 6.56 5.64 4.77 4.15 5.70 2000 3.35 3.23 3.52 5.48 5.94 6.81 8.43 8.22 7.78 6.19 5.16 4.66 5.73 MEAN 3.18 3.18 3.96 5.27 6.53 7.08 8.12 7.37 5.51 5.00 4.18 3.51 5.23 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 6 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 3.85 3.53 2.74 4.49 4.21 4.94 6.35 6.35 5.99 3.85 3.10 3.31 4.39 1962 3.29 3.09 2.92 4.98 5.49 5.57 6.10 6.23 4.83 4.38 3.51 4.07 4.54 1963 3.66 3.03 2.74 4.66 5.51 4.82 7.09 6.96 4.38 4.97 3.86 3.65 4.61 1964 2.37 3.37 3.69 3.44 3.54 5.40 6.85 5.64 5.09 3.67 3.28 3.22 4.13 1965 3.60 2.98 4.21 3.58 4.10 5.28 6.24 5.51 5.45 5.62 4.20 3.12 4.49 1966 3.65 3.22 3.81 4.36 5.37 4.97 6.14 5.76 5.30 6.40 3.40 3.41 4.65 1967 3.16 3.29 2.67 3.77 5.07 4.44 7.09 5.73 5.61 4.90 5.01 3.40 4.51 1968 2.94 3.28 3.82 4.86 5.94 6.00 5.97 6.62 4.43 4.83 6.22 4.19 4.93 1969 3.38 3.69 5.78 5.18 5.79 ****** 8.51 7.24 5.33 6.00 3.80 3.72 ****** 1970 3.92 2.85 3.78 4.54 4.74 5.43 7.64 7.75 5.75 3.68 4.07 3.51 4.81 1971 3.40 3.20 3.79 5.41 5.70 6.01 6.68 6.07 5.08 4.10 4.86 3.42 4.81 1972 3.17 3.38 4.30 4.76 6.25 6.79 7.35 6.29 4.79 4.24 3.79 3.40 4.87 1973 2.62 3.69 2.91 3.57 4.69 5.40 7.08 6.49 5.99 3.93 2.84 2.61 4.32 1974 3.38 3.74 5.06 4.51 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 6.69 ****** 10.49 13.00 18.48 16.89 24.86 24.81 16.97 10.01 ****** 5.95 ****** 1982 5.02 4.82 6.66 11.90 14.01 16.10 12.80 14.46 11.40 10.10 7.52 5.53 10.03 1983 4.55 5.43 ****** 8.23 11.23 13.23 15.54 17.78 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.65 3.26 4.95 3.95 4.41 4.77 5.59 5.53 6.24 4.62 3.83 3.18 4.50 1992 2.73 2.66 3.31 3.87 5.39 5.12 5.55 5.91 4.08 3.63 3.81 ****** ****** 1993 2.73 ****** 2.77 3.69 4.45 4.94 6.03 5.81 4.41 3.49 4.98 4.03 ****** 1994 3.98 2.89 3.43 4.21 4.07 4.77 6.08 5.45 4.66 5.67 4.79 2.95 4.41 1995 3.10 3.27 3.14 4.79 5.14 5.79 6.63 5.16 4.43 4.24 2.83 3.27 4.32 1996 3.41 4.14 4.14 4.67 6.15 5.26 5.97 5.39 4.57 4.33 3.25 3.41 4.56 1997 2.91 2.10 3.06 3.92 4.44 5.98 7.72 5.37 4.07 4.09 4.84 4.32 4.40 1998 3.40 3.36 3.72 4.69 5.61 6.80 10.36 7.99 6.62 5.49 4.97 4.91 5.66 1999 3.82 3.44 3.83 5.70 6.29 6.94 8.74 7.50 7.13 6.01 5.10 4.27 5.73 2000 3.49 3.34 3.73 5.79 5.88 7.21 8.76 8.85 8.41 6.66 5.38 4.95 6.04 MEAN 3.56 3.41 4.06 5.21 6.23 6.76 8.22 7.80 6.04 5.16 4.31 3.83 5.38 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 7 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 4.07 3.68 2.80 4.50 4.21 4.89 6.35 6.18 5.59 3.68 3.08 3.43 4.37 1962 3.44 3.27 3.27 4.96 4.99 5.21 5.81 5.95 5.01 4.72 3.59 3.89 4.51 1963 3.82 3.29 2.89 4.42 5.28 4.12 6.12 6.70 4.96 4.81 4.02 3.62 4.50 1964 1.65 3.38 3.59 3.00 3.24 4.51 6.43 5.17 4.81 3.44 3.29 3.02 3.79 1965 3.51 3.02 3.95 3.19 4.16 4.30 5.64 5.29 5.01 5.85 4.05 3.17 4.26 1966 3.60 3.48 3.76 4.87 4.76 4.30 5.72 6.02 5.60 6.41 3.34 3.47 4.61 1967 3.17 3.15 2.80 4.11 4.67 4.07 6.63 6.07 5.39 4.81 4.80 3.34 4.42 1968 3.05 3.35 3.47 4.63 5.75 5.13 6.18 7.82 4.21 4.56 6.38 4.42 4.91 1969 3.20 3.81 5.86 5.27 5.52 ****** 8.26 7.15 5.61 6.20 4.03 4.17 ****** 1970 3.64 2.99 3.97 4.36 3.83 5.12 7.20 7.29 5.92 3.56 3.84 3.70 4.62 1971 3.49 3.25 3.89 4.59 5.61 5.56 6.82 6.29 6.02 4.25 4.77 3.62 4.85 1972 3.12 3.38 4.05 4.47 5.94 5.97 6.97 6.19 5.08 4.89 3.93 3.58 4.80 1973 3.10 3.91 3.02 3.33 3.97 5.43 7.51 7.31 6.02 4.15 2.95 3.10 4.48 1974 3.38 3.54 4.94 4.76 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 5.79 ****** 10.29 12.87 17.11 18.20 27.66 24.51 18.32 10.44 ****** 5.50 ****** 1982 4.75 4.46 6.02 11.46 14.23 17.86 14.47 15.84 12.54 9.98 6.82 4.07 10.21 1983 3.37 4.40 ****** 8.16 10.66 14.49 18.75 19.79 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.74 3.20 4.87 3.90 4.22 4.29 5.31 5.38 5.70 4.78 3.99 3.38 4.40 1992 2.65 2.70 3.32 3.62 5.20 4.72 5.08 5.76 4.04 4.14 4.19 ****** ****** 1993 2.77 ****** 2.64 3.67 4.29 3.43 5.65 5.74 4.60 3.80 5.04 4.49 ****** 1994 4.05 3.04 3.41 4.02 4.04 4.30 5.89 5.46 4.57 6.13 5.31 2.91 4.43 1995 3.19 3.21 2.92 4.61 5.06 4.56 5.40 4.58 4.24 4.10 2.89 3.13 3.99 1996 3.18 3.91 4.13 4.38 5.60 4.93 5.87 4.93 4.53 4.41 3.28 3.20 4.36 1997 2.81 1.91 3.04 3.58 4.13 5.00 6.62 5.09 4.11 4.45 5.30 4.61 4.22 1998 3.47 3.33 3.82 4.63 5.58 6.67 10.10 7.68 6.81 5.38 5.07 5.05 5.63 1999 3.75 3.35 3.70 5.10 5.80 6.26 8.11 7.35 6.71 5.61 4.81 4.41 5.41 2000 3.54 3.27 3.47 5.26 5.25 6.66 8.10 8.16 7.98 6.25 5.34 5.01 5.69 MEAN 3.46 3.38 4.00 5.03 5.89 6.40 8.18 7.84 6.14 5.24 4.34 3.85 5.31 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 8 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 1961 -6.5 31 -9.5 1 -3.2 4 1.0 17 9.2 1 10.7 7 21.0 3 18.0 9 14.7 20 5.2 27 -2.7 24 -1.2 27 -9.5 1962 -3.0 14 -2.2 11 -2.0 13 3.8 6 7.2 12 10.5 11 20.7 25 17.2 11 10.2 27 5.5 12 -3.5 30 -2.5 1 -3.5 1963 -2.0 9 -2.0 5 -4.7 8 5.5 1 7.0 4 16.5 13 18.5 1 18.2 23 11.0 14 9.0 31 -0.5 28 -13.0 28 -13.0 1964 -14.0 20 -5.5 1 1.0 8 0.7 15 6.5 2 19.5 16 20.5 1 20.0 21 15.5 22 4.7 29 -7.0 29 -7.2 15 -14.0 1965 -5.5 23 -5.0 3 -2.5 16 -1.0 6 6.5 4 17.5 7 20.2 7 20.2 10 13.0 23 6.5 27 3.2 30 -4.0 21 -5.5 1966 -1.7 14 1.0 8 -0.5 21 5.2 5 10.7 8 18.7 15 18.7 7 21.0 17 11.1 30 8.2 27 1.0 27 -1.5 24 -1.7 1967 -4.5 24 -11.7 3 -4.7 3 -6.4 2 8.5 1 8.2 6 18.2 6 20.0 29 13.2 26 6.2 23 -2.4 30 -6.0 25 -11.7 1968 -9.0 23 -6.5 8 -3.5 24 2.0 4 11.0 3 11.2 18 16.5 13 13.2 21 15.0 20 5.5 29 3.0 19 -0.5 23 -9.0 1969 -12.5 8 -8.2 3 -0.5 24 0.0 14 9.7 9 ***** ** 17.2 10 15.0 31 10.0 15 5.5 31 -3.2 18 -1.0 28 ***** 1970 -8.5 29 -4.5 2 1.0 6 3.5 25 8.0 8 15.0 11 18.0 6 20.2 11 12.5 19 5.5 25 3.5 30 -4.5 17 -8.5 1971 -4.5 27 -4.7 2 -1.2 16 1.2 3 13.0 2 15.0 6 19.0 25 20.0 1 13.2 20 8.2 28 3.0 16 -4.0 23 -4.7 1972 -15.5 24 -12.0 2 -1.7 20 3.0 3 5.2 8 15.2 17 20.5 28 14.7 26 14.0 19 6.2 31 3.0 9 -10.5 24 -15.5 1973 -12.5 2 -6.5 7 -2.5 10 3.7 20 8.0 24 13.2 14 21.5 3 19.5 16 10.2 27 9.2 14 -4.0 8 -6.7 14 -12.5 1974 -8.0 19 -9.0 3 -3.5 7 1.5 3 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1975 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1976 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1977 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1978 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1979 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1980 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1981 -2.0 23 ***** ** -1.0 4 3.0 7 7.0 5 14.0 7 18.0 8 21.0 19 9.8 24 7.0 16 ***** ** 0.0 20 ***** 1982 -6.1 23 -9.0 18 -3.5 1 5.5 10 11.5 24 15.4 2 17.0 1 18.6 23 10.5 4 7.0 11 -3.6 30 -8.5 10 -9.0 1983 -12.5 27 -8.5 23 ***** ** 1.6 2 9.5 3 16.2 9 19.2 1 18.9 27 ***** ** ***** ** ***** ** ***** ** ***** 1984 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1985 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1986 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1987 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1988 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1989 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 -4.0 28 -8.0 13 -3.6 11 5.0 13 8.0 6 16.6 19 20.0 15 20.2 28 11.8 28 11.2 16 3.0 28 -3.5 22 -8.0 1992 -8.0 28 -5.2 12 -6.0 11 3.5 3 4.5 5 15.0 9 21.5 12 15.0 31 11.0 2 9.5 18 -1.2 28 ***** ** ***** 1993 -5.4 21 ***** ** -3.0 23 6.5 14 8.6 9 15.6 22 22.0 17 20.2 25 15.8 27 6.8 8 -1.5 15 -1.6 6 ***** 1994 -1.0 12 -3.6 4 2.4 17 2.0 5 8.5 7 11.8 5 17.8 1 23.0 10 14.5 21 9.0 25 2.0 26 -7.2 7 -7.2 1995 -1.0 21 -1.0 25 1.7 27 5.5 7 9.2 9 14.0 1 21.7 1 19.5 31 12.5 22 7.0 19 -1.8 26 -2.5 20 -2.5 1996 -6.6 19 -3.0 6 -1.4 1 3.5 5 12.0 8 16.4 28 19.0 15 20.0 30 16.6 24 7.0 17 0.8 13 0.6 3 -6.6 1997 -7.4 29 -6.4 7 -4.4 8 0.5 12 9.5 6 17.2 2 21.0 7 22.0 29 13.6 15 10.0 25 2.6 27 -1.0 28 -7.4 1998 -6.4 14 -5.6 28 -2.8 3 3.8 6 8.6 4 18.4 2 20.4 25 17.5 4 16.6 13 7.5 11 8.0 25 2.0 5 -6.4 1999 -2.5 3 -1.0 9 -0.4 18 5.2 10 11.2 5 20.0 6 17.0 15 21.6 31 12.5 28 7.0 27 -1.0 30 -1.0 2 -2.5 2000 -5.0 18 -3.0 8 -2.0 3 10.0 1 14.5 2 12.0 13 21.5 27 21.6 12 17.5 30 8.5 4 2.2 11 0.6 16 -5.0 LOW. -15.5 24 -12.0 2 -6.0 11 -6.4 2 4.5 5 8.2 6 16.5 13 13.2 21 9.8 24 4.7 29 -7.0 29 -13.0 28 -15.5 YEAR 1972 1972 1992 1967 1992 1967 1968 1968 1981 1964 1964 1963 1972 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 9 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 1961 16.0 19 14.7 8 20.5 25 28.2 28 32.7 24 36.5 20 38.5 11 35.2 20 34.0 1 28.0 1 21.2 5 16.0 9 38.5 1962 11.5 30 17.0 20 23.7 24 24.0 9 30.5 18 34.0 29 37.0 5 38.0 1 33.0 3 29.0 8 21.2 1 17.0 21 38.0 1963 16.5 29 19.0 20 22.5 25 26.0 9 28.0 24 35.0 27 39.0 18 37.2 13 35.2 4 28.5 2 21.3 2 17.0 23 39.0 1964 6.0 16 14.2 22 24.0 26 26.0 6 31.5 31 34.7 26 39.5 11 38.5 14 34.0 5 29.2 2 19.5 20 10.5 8 39.5 1965 8.0 28 16.5 28 22.7 11 26.7 27 36.0 18 33.7 28 39.5 14 36.5 14 33.2 1 26.7 13 21.0 4 16.5 15 39.5 1966 16.5 25 18.7 27 20.0 9 26.5 20 32.5 24 35.7 10 38.5 24 37.5 31 34.4 8 25.7 7 21.7 1 17.7 9 38.5 1967 15.5 16 14.7 24 18.2 27 24.7 24 30.2 25 34.0 17 39.0 7 37.0 21 36.0 4 25.0 11 23.7 1 16.2 15 39.0 1968 14.7 14 17.7 29 21.2 14 26.5 18 31.0 21 35.5 28 38.0 5 38.5 17 35.5 4 29.0 4 18.5 8 13.7 1 38.5 1969 11.0 21 15.0 27 21.5 31 26.0 1 31.5 27 ***** ** 37.7 16 39.7 6 33.2 9 30.5 6 19.0 2 18.5 5 ***** 1970 9.5 18 16.7 18 26.0 31 28.0 19 34.5 27 38.5 30 38.7 31 37.5 5 39.0 9 32.2 1 23.5 1 16.0 5 39.0 1971 16.5 4 15.7 22 22.0 18 24.0 27 31.7 28 36.0 22 39.5 6 37.2 6 35.7 2 27.0 16 20.5 4 15.5 1 39.5 1972 9.5 19 10.5 19 18.0 30 27.5 30 28.2 27 39.0 24 36.7 6 35.7 16 34.7 2 30.2 1 19.5 2 10.0 13 39.0 1973 8.0 29 20.0 19 20.7 2 27.5 27 32.0 29 38.0 28 40.2 15 38.2 4 34.7 1 29.5 7 23.5 2 15.0 4 40.2 1974 5.0 23 9.5 14 24.5 20 26.2 23 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1975 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1976 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1977 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1978 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1979 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1980 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1981 14.0 5 ***** ** 22.0 25 ***** ** ***** ** 32.0 24 37.5 19 35.0 8 33.6 14 26.2 4 ***** ** 17.2 16 ***** 1982 13.6 11 12.1 4 17.0 18 29.0 27 31.5 19 36.8 8 36.2 17 36.8 5 32.0 5 25.0 1 17.0 7 10.0 20 36.8 1983 11.0 21 11.9 26 ***** ** 24.0 18 30.1 17 35.1 18 37.5 5 38.6 16 ***** ** ***** ** ***** ** ***** ** ***** 1984 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1985 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1986 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1987 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1988 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1989 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 9.6 31 12.5 28 19.5 30 27.5 22 29.5 29 35.6 29 37.0 7 38.5 6 35.0 8 24.6 27 22.5 3 13.0 10 38.5 1992 8.2 2 12.4 22 17.5 29 25.0 21 29.4 30 35.8 30 38.4 5 35.5 25 30.6 25 26.2 13 20.6 2 ***** ** ***** 1993 12.4 29 ***** ** 20.4 30 27.4 19 29.2 19 36.0 29 36.8 3 36.2 14 34.5 4 29.0 1 17.6 3 14.5 26 ***** 1994 16.0 3 14.8 27 22.0 31 29.0 22 31.0 31 34.4 16 38.8 30 38.0 1 34.0 1 23.6 2 19.5 3 12.6 3 38.8 1995 15.0 31 15.2 4 20.6 24 25.0 3 29.6 22 34.4 29 41.0 16 38.5 5 32.7 11 29.5 4 22.6 2 12.0 1 41.0 1996 10.5 3 16.0 10 21.7 31 23.0 22 32.5 31 36.0 4 35.7 3 36.2 11 35.2 17 25.8 1 19.5 6 16.0 28 36.2 1997 14.4 7 14.4 18 17.0 22 28.0 26 33.0 28 35.0 27 38.8 14 38.8 15 35.0 1 28.8 4 16.4 5 13.0 8 38.8 1998 8.2 30 15.0 7 19.6 28 28.6 15 31.0 11 36.4 28 39.2 11 37.0 17 34.2 2 30.5 1 22.4 1 17.6 11 39.2 1999 11.0 30 17.0 27 19.5 26 26.5 30 34.6 31 36.0 1 37.4 4 36.6 25 33.2 11 29.0 6 18.2 19 16.6 29 37.4 2000 16.2 1 16.2 24 19.0 30 28.4 20 33.0 26 37.5 30 37.4 11 38.0 3 35.4 8 25.5 11 19.8 3 11.0 22 38.0 HIG. 16.5 29 20.0 19 26.0 31 29.0 27 36.0 18 39.0 24 41.0 16 39.7 6 39.0 9 32.2 1 23.7 1 18.5 5 41.0 YEAR 1963 1973 1970 1982 1965 1972 1995 1969 1970 1970 1967 1969 1995 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 10 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 1961 16.0 3 14.0 28 15.6 13 6.7 26 0.0 ** 0.0 ** 1.2 18 1.2 1 0.0 ** 0.0 ** 0.0 ** 9.0 14 16.0 1962 5.0 3 18.3 8 9.5 1 50.4 21 1.8 15 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 50.4 1963 2.8 28 3.5 12 4.5 20 5.5 30 9.5 2 1.0 29 0.0 ** 10.0 3 1.5 10 5.5 20 15.0 3 20.0 25 20.0 1964 0.0 ** 13.0 2 3.5 12 10.0 12 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 10.5 25 12.0 13 13.0 1965 26.0 11 8.0 14 16.5 2 7.5 1 4.0 11 0.0 ** 0.0 ** 0.0 ** 1.5 30 6.0 1 7.5 9 11.0 30 26.0 1966 9.0 30 28.0 2 16.5 1 8.0 18 8.0 6 1.0 4 0.0 ** 0.0 ** 8.0 30 7.0 25 0.0 ** 7.0 27 28.0 1967 3.6 4 10.0 22 9.0 8 7.0 1 6.0 15 0.0 ** 0.0 ** 0.0 ** 0.0 ** 5.0 12 7.5 25 5.5 4 10.0 1968 14.0 22 16.0 3 10.5 17 19.0 2 22.5 30 7.0 23 0.0 ** 0.0 ** 0.0 ** 8.0 25 16.5 17 8.5 7 22.5 1969 39.0 23 9.0 2 20.5 15 19.5 13 0.0 ** ***** ** 2.0 11 9.0 26 4.5 12 10.0 30 12.0 3 11.0 27 ***** 1970 19.3 27 0.0 ** 15.5 11 19.5 23 7.5 7 0.0 ** 4.0 18 0.0 ** 0.0 ** 0.0 ** 16.2 28 20.5 12 20.5 1971 10.5 15 12.0 13 3.5 19 16.5 24 1.5 19 0.0 ** 0.5 31 0.0 ** 0.0 ** 2.8 27 15.0 19 16.0 30 16.5 1972 13.0 7 18.5 20 25.0 21 8.5 5 10.0 10 10.2 17 0.2 16 4.0 24 0.0 ** 0.5 9 18.0 29 12.5 12 25.0 1973 9.0 17 32.0 22 4.0 3 7.0 17 0.2 11 0.2 9 0.0 ** 0.0 ** 0.0 ** 0.0 ** 13.7 23 11.0 30 32.0 1974 14.0 14 13.0 18 9.0 4 9.5 5 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1975 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1976 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1977 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1978 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1979 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1980 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1981 0.0 ** ***** ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 4.0 22 0.0 ** 0.0 ** 0.0 ** ***** ** 0.0 ** ***** 1982 3.5 7 0.0 ** 3.0 18 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 3.0 4 2.0 9 0.0 ** 3.5 1983 0.0 ** 0.0 ** ***** ** 0.0 ** 2.2 29 0.0 ** 0.0 ** 0.0 ** ***** ** ***** ** ***** ** ***** ** ***** 1984 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1985 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1986 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1987 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1988 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1989 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 9.0 22 11.0 21 31.0 6 13.0 4 2.0 3 4.0 19 0.0 ** 0.0 ** 0.0 ** 1.0 15 0.0 ** 20.0 9 31.0 1992 13.0 31 18.3 25 15.0 15 24.9 27 21.8 2 5.0 3 0.0 ** 4.0 29 0.0 ** 0.2 8 6.0 8 ***** ** ***** 1993 22.0 8 ***** ** 17.0 8 8.0 8 3.0 14 1.0 1 0.0 ** 1.0 29 0.0 ** 3.0 29 16.0 3 13.0 16 ***** 1994 12.0 17 37.0 1 14.0 12 15.0 30 12.0 6 2.0 3 0.0 ** 0.0 ** 0.0 ** 23.0 4 37.0 26 3.0 1 37.0 1995 4.1 17 11.0 24 16.0 17 31.0 24 4.2 26 2.0 1 0.0 ** 0.0 ** 0.8 22 3.3 25 0.0 ** 6.0 13 31.0 1996 11.0 19 30.0 2 60.0 2 30.0 3 13.0 8 14.0 28 0.4 12 0.0 ** 0.0 ** 11.0 16 0.3 9 9.1 22 60.0 1997 6.0 16 3.0 19 10.0 4 6.0 6 0.3 5 8.0 24 0.6 6 0.0 ** 0.0 ** 0.4 7 18.0 2 25.0 10 25.0 1998 22.0 6 18.0 12 32.0 30 21.0 6 7.0 4 0.0 ** 2.0 30 16.0 4 2.0 14 4.0 11 1.0 11 41.0 4 41.0 1999 14.0 10 7.0 8 15.4 21 3.0 24 1.0 10 0.0 ** 5.0 14 0.0 ** 0.2 27 11.4 27 22.0 11 8.0 10 22.0 2000 18.0 28 29.0 14 7.0 23 1.0 22 0.6 24 0.0 ** 0.8 13 0.0 ** 2.0 6 19.0 17 6.0 30 29.0 1 29.0 HIG. 39.0 23 37.0 1 60.0 2 50.4 21 22.5 30 14.0 28 5.0 14 16.0 4 8.0 30 23.0 4 37.0 26 41.0 4 60.0 YEAR 1969 1994 1996 1962 1968 1996 1999 1998 1966 1994 1994 1998 1996 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 11 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY TOTAL PRECIPITATION WITH SEASONAL PERCENT. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL SEASONAL-PERCENT ----------------------- 1961 57.4 36.2 21.1 17.4 0.0 0.0 1.2 2.4 0.0 0.0 0.0 12.5 148.2 77.4 11.7 2.4 8.4 1962 18.4 64.4 9.5 161.5 4.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 257.8 35.8 64.2 0.0 0.0 1963 5.8 6.0 13.0 8.1 60.9 1.0 0.0 21.0 1.5 7.5 24.0 74.2 223.0 11.1 31.4 10.1 47.4 1964 0.0 22.1 8.5 22.5 0.0 0.0 0.0 0.0 0.0 0.0 16.0 22.0 91.1 33.6 24.7 0.0 41.7 1965 111.5 8.0 26.5 8.0 7.0 0.0 0.0 0.0 1.5 23.3 15.0 13.0 213.8 68.3 7.0 0.7 24.0 1966 21.0 30.0 44.2 22.5 15.5 1.0 0.0 0.0 8.0 31.5 0.0 16.0 189.7 50.2 20.6 4.2 25.0 1967 4.1 25.0 9.0 35.5 13.5 0.0 0.0 0.0 0.0 10.5 21.0 6.0 124.6 30.6 39.3 0.0 30.1 1968 25.5 30.5 38.5 38.0 36.0 13.5 0.0 0.0 0.0 9.0 63.5 36.0 290.5 32.5 30.1 0.0 37.3 1969 107.5 37.5 116.4 35.5 0.0 ****** 2.5 9.5 7.5 35.1 15.7 24.9 ****** 66.7 9.1 5.0 19.3 1970 36.3 0.0 45.4 21.5 11.8 0.0 4.5 0.0 0.0 0.0 24.4 57.5 201.4 40.6 16.5 2.2 40.7 1971 23.5 35.6 8.5 66.0 3.0 0.0 0.5 0.0 0.0 3.0 40.3 28.3 208.7 32.4 33.1 0.2 34.3 1972 46.2 57.5 116.3 21.5 35.1 10.9 0.2 9.0 0.0 1.2 46.5 62.0 406.4 54.1 16.6 2.3 27.0 1973 26.5 65.0 5.5 21.5 0.2 0.2 0.0 0.0 0.0 0.0 17.7 34.0 170.6 56.9 12.8 0.0 30.3 1974 73.0 63.5 36.3 40.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** 80.9 19.1 ***** ***** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1981 0.0 ****** 0.0 0.0 0.0 0.0 4.0 0.0 0.0 0.0 ****** 0.0 ****** 0.0 0.0 100.0 0.0 1982 7.0 0.0 3.0 0.0 0.0 0.0 0.0 0.0 0.0 5.0 2.0 0.0 17.0 58.8 0.0 0.0 41.2 1983 0.0 0.0 ****** 0.0 7.5 0.0 0.0 0.0 ****** ****** ****** ****** ****** 0.0 100.0 0.0 ***** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1991 22.1 33.7 124.5 22.6 8.7 4.0 0.0 0.0 0.0 2.3 0.0 74.9 292.8 61.6 12.1 0.0 26.4 1992 39.7 37.1 78.2 48.4 63.6 12.2 0.0 4.0 0.0 0.2 6.1 ****** ****** 53.5 42.9 1.4 2.2 1993 39.9 ****** 60.3 24.9 8.8 2.0 0.0 1.0 0.0 5.1 66.5 19.2 ****** 44.0 15.7 0.4 39.9 1994 53.4 51.6 30.6 19.2 38.5 3.0 0.0 0.0 0.0 35.7 146.8 6.2 385.0 35.2 15.8 0.0 49.0 1995 6.5 19.6 31.2 44.2 16.4 2.4 0.0 0.0 0.8 4.2 0.0 23.7 149.0 38.5 42.3 0.5 18.7 1996 76.6 91.5 182.4 68.5 38.4 15.4 0.4 0.0 0.0 22.4 0.3 15.1 511.0 68.6 23.9 0.1 7.4 1997 7.0 5.0 55.4 12.6 0.3 11.3 0.6 0.0 0.0 1.0 35.3 56.7 185.2 36.4 13.1 0.3 50.2 1998 66.3 58.4 77.6 44.7 31.1 0.0 2.4 17.6 3.0 4.8 1.4 61.3 368.6 54.9 20.6 6.2 18.3 1999 43.2 16.1 53.2 5.3 1.0 0.0 13.3 0.0 0.2 18.4 66.6 26.0 243.3 46.2 2.6 5.5 45.6 2000 45.1 43.5 17.6 1.6 0.6 0.0 0.8 0.0 2.8 48.5 23.3 83.4 267.2 39.7 0.8 1.3 58.1 MEAN 35.7 33.5 46.6 30.1 15.5 3.1 1.2 2.5 1.0 10.7 26.4 31.4 237.7 48.8 20.4 1.9 28.8 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 12 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF DAYS WITH PRECIPITATION YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 9 6 3 6 0 0 1 2 0 0 0 2 29 1962 8 5 1 12 3 0 0 0 0 0 0 0 29 1963 3 3 5 3 13 1 0 3 1 3 2 8 45 1964 0 4 4 3 0 0 0 0 0 0 2 3 16 1965 8 1 4 2 2 0 0 0 1 8 4 2 32 1966 3 2 6 9 4 1 0 0 1 8 0 4 38 1967 2 5 1 7 3 0 0 0 0 5 4 2 29 1968 6 3 6 5 7 4 0 0 0 2 10 9 52 1969 11 8 20 7 0 *** 2 2 3 12 3 5 *** 1970 7 0 8 2 5 0 2 0 0 0 3 4 31 1971 4 8 5 10 2 0 1 0 0 2 9 7 48 1972 9 5 12 5 14 3 1 3 0 3 3 10 68 1973 7 6 3 6 1 1 0 0 0 0 2 6 32 1974 14 11 9 9 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 0 0 0 1 0 0 0 *** 0 *** 1982 3 0 1 0 0 0 0 0 0 2 1 0 7 1983 0 0 *** 0 6 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 10 14 14 5 6 1 0 0 0 4 0 12 66 1992 10 11 13 10 16 8 0 1 0 1 2 *** *** 1993 7 *** 10 7 8 2 0 1 0 2 13 5 *** 1994 9 4 8 7 6 2 0 0 0 8 15 5 64 1995 4 8 7 9 11 3 0 0 1 2 0 6 51 1996 12 14 15 11 8 3 1 0 0 3 1 2 70 1997 2 2 11 5 1 4 1 0 0 3 9 10 48 1998 9 9 12 8 10 0 2 3 3 2 2 4 64 1999 7 5 8 5 1 0 4 0 1 3 6 6 46 2000 10 5 4 3 1 0 1 0 2 9 12 10 57 MEAN 6 6 7 6 5 1 1 1 1 3 4 5 46 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 13 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 1961 9 4 2 4 0 0 1 2 0 0 0 2 24 1962 7 5 1 12 3 0 0 0 0 0 0 0 28 1963 2 3 5 3 13 1 0 3 1 2 2 8 43 1964 0 4 3 3 0 0 0 0 0 0 2 3 15 1965 8 1 4 1 2 0 0 0 1 7 3 2 29 1966 3 2 6 6 4 1 0 0 1 8 0 4 35 1967 1 5 1 7 3 0 0 0 0 4 4 1 26 1968 5 3 6 4 6 3 0 0 0 2 10 9 48 1969 11 8 20 7 0 *** 1 1 2 11 2 3 *** 1970 6 0 6 2 3 0 1 0 0 0 3 4 25 1971 4 6 4 10 2 0 0 0 0 1 7 7 41 1972 8 5 12 4 7 1 0 3 0 0 3 9 52 1973 7 6 2 5 0 0 0 0 0 0 2 5 27 1974 13 11 8 8 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 0 0 0 1 0 0 0 *** 0 *** 1982 3 0 1 0 0 0 0 0 0 2 1 0 7 1983 0 0 *** 0 4 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 6 7 12 3 5 1 0 0 0 1 0 10 45 1992 7 6 12 8 11 4 0 1 0 0 1 *** *** 1993 6 *** 9 6 5 2 0 1 0 2 10 3 *** 1994 8 4 7 4 5 2 0 0 0 4 12 2 48 1995 2 4 6 5 7 1 0 0 0 1 0 6 32 1996 12 10 13 8 6 2 0 0 0 2 0 2 55 1997 2 2 7 2 0 3 0 0 0 0 6 6 28 1998 7 7 10 6 8 0 1 2 1 1 1 3 47 1999 6 4 6 2 1 0 3 0 0 3 5 5 35 2000 8 4 3 1 0 0 0 0 1 6 8 7 38 MEAN 6 4 6 4 4 1 0 1 0 2 3 4 35 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 14 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 1961 2 2 1 0 0 0 0 0 0 0 0 0 5 1962 0 4 0 5 0 0 0 0 0 0 0 0 9 1963 0 0 0 0 0 0 0 1 0 0 1 4 6 1964 0 1 0 1 0 0 0 0 0 0 1 1 4 1965 6 0 1 0 0 0 0 0 0 0 0 1 8 1966 0 1 3 0 0 0 0 0 0 0 0 0 4 1967 0 1 0 0 0 0 0 0 0 0 0 0 1 1968 1 2 2 2 1 0 0 0 0 0 2 0 10 1969 4 0 4 1 0 *** 0 0 0 1 1 2 *** 1970 1 0 2 1 0 0 0 0 0 0 1 3 8 1971 1 2 0 3 0 0 0 0 0 0 1 1 8 1972 1 3 7 0 1 1 0 0 0 0 3 3 19 1973 0 3 0 0 0 0 0 0 0 0 1 2 6 1974 2 1 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 0 0 0 0 0 0 0 *** 0 *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 0 0 *** 0 0 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 1 5 1 0 0 0 0 0 0 0 4 11 1992 1 2 3 1 2 0 0 0 0 0 0 *** *** 1993 1 *** 3 0 0 0 0 0 0 0 2 1 *** 1994 2 1 1 1 2 0 0 0 0 1 5 0 13 1995 0 1 1 1 0 0 0 0 0 0 0 0 3 1996 2 5 5 2 2 1 0 0 0 2 0 0 19 1997 0 0 4 0 0 0 0 0 0 0 1 3 8 1998 3 3 2 1 0 0 0 1 0 0 0 2 12 1999 2 0 2 0 0 0 0 0 0 1 4 0 9 2000 1 2 0 0 0 0 0 0 0 2 0 3 8 MEAN 1 1 2 1 0 0 0 0 0 0 1 1 7 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 15 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 81 71 51 57 32 27 26 31 31 31 43 54 45 1962 64 59 42 60 40 35 29 32 25 36 53 67 45 1963 58 49 48 49 57 28 25 31 22 38 53 66 44 1964 41 61 50 43 25 25 26 23 25 32 44 71 39 1965 83 63 58 43 28 28 27 23 30 53 49 50 45 1966 56 49 56 52 40 22 27 21 29 61 40 54 42 1967 59 67 50 53 39 23 29 19 29 40 59 55 44 1968 69 64 58 56 48 37 26 26 22 39 72 73 49 1969 77 76 69 58 44 *** 36 33 34 52 63 62 *** 1970 72 55 55 41 35 25 36 27 30 29 46 61 43 1971 55 61 57 57 37 27 26 25 29 36 65 57 44 1972 83 82 72 49 58 36 29 32 22 32 50 70 51 1973 66 60 43 42 38 27 28 25 30 27 48 61 41 1974 78 78 67 52 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 88 *** 88 88 83 80 79 77 74 74 *** 81 *** 1982 86 86 79 76 79 69 49 63 60 80 90 81 75 1983 83 78 *** 75 66 55 55 60 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 70 65 66 41 41 29 27 26 33 44 49 63 46 1992 65 55 61 48 56 32 25 33 28 36 46 *** *** 1993 64 *** 52 45 41 28 29 30 28 39 74 69 *** 1994 69 59 51 42 39 29 26 22 31 54 62 60 45 1995 59 58 44 49 41 33 23 22 32 41 33 63 42 1996 68 71 70 52 44 30 27 27 24 43 48 53 46 1997 51 41 56 37 30 31 27 20 27 36 65 75 41 1998 70 66 57 44 43 34 41 39 38 45 47 60 49 1999 75 52 53 51 38 31 44 33 37 43 66 68 49 2000 65 61 50 42 33 33 35 35 41 56 71 80 50 MEAN 69 63 58 52 44 34 33 32 32 44 56 65 49 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 16 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 63 51 30 34 17 17 18 21 22 22 27 38 30 1962 49 37 22 39 25 20 18 21 20 25 32 52 30 1963 41 33 27 30 32 16 20 21 16 26 34 59 30 1964 57 48 32 28 15 17 19 16 18 23 31 58 30 1965 70 41 42 27 17 18 18 17 22 33 34 36 31 1966 40 34 39 30 27 16 18 17 20 42 27 40 29 1967 45 53 27 33 25 18 21 16 22 28 42 43 31 1968 49 48 39 38 30 23 18 21 16 28 58 53 35 1969 71 65 61 39 27 *** 26 24 23 35 39 44 *** 1970 65 31 41 27 20 17 23 22 22 19 30 49 31 1971 49 46 33 41 23 20 19 18 19 22 44 45 32 1972 71 64 56 29 37 25 21 22 17 19 33 61 38 1973 53 45 29 26 21 16 20 18 23 18 25 39 28 1974 70 70 53 37 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 83 *** 81 83 84 62 71 71 59 57 *** 60 *** 1982 72 77 71 61 61 53 38 46 43 54 82 88 62 1983 82 73 *** 61 52 42 40 48 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 60 55 58 27 24 18 17 17 24 28 34 48 34 1992 53 42 46 31 41 19 16 22 17 21 32 *** *** 1993 53 *** 35 27 25 17 19 19 16 24 58 52 *** 1994 55 42 33 27 21 17 18 16 21 36 43 46 31 1995 39 42 30 33 27 22 18 14 18 27 22 53 29 1996 62 59 59 37 30 19 18 17 16 26 30 40 34 1997 38 28 38 29 22 20 21 15 16 21 49 59 30 1998 61 54 41 29 29 22 30 24 25 31 36 48 36 1999 56 38 41 37 27 22 29 21 28 33 53 53 37 2000 53 46 39 30 22 24 26 27 30 45 59 68 39 MEAN 58 49 42 36 30 23 24 24 23 30 40 51 36 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 17 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 78 61 35 38 18 16 18 21 24 27 34 49 35 1962 58 45 28 44 25 19 17 21 23 32 42 57 34 1963 52 40 31 31 35 14 17 22 20 29 44 70 34 1964 49 56 34 28 15 15 17 15 20 27 40 66 32 1965 78 48 44 27 20 15 17 17 24 42 40 45 35 1966 45 42 40 38 27 14 17 18 25 48 35 50 33 1967 55 55 33 39 24 15 19 18 23 35 50 52 35 1968 57 57 38 38 33 20 19 25 17 31 71 69 40 1969 76 75 62 44 31 *** 27 26 28 44 51 61 *** 1970 68 39 45 30 19 17 23 21 26 24 36 63 34 1971 63 53 38 39 26 19 20 19 26 29 52 57 37 1972 83 78 60 31 41 24 21 23 22 28 42 74 44 1973 76 56 34 26 20 18 22 23 28 25 33 59 35 1974 83 76 57 41 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 88 *** 89 90 87 73 82 80 76 77 *** 74 *** 1982 81 82 81 70 72 63 46 55 57 68 90 86 71 1983 83 77 *** 73 57 49 54 61 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 66 57 56 27 24 16 15 17 23 31 40 56 36 1992 57 47 49 31 37 19 14 20 18 28 40 *** *** 1993 59 *** 34 28 24 12 17 18 18 29 64 64 *** 1994 61 46 34 27 22 15 16 15 21 44 51 49 33 1995 44 42 29 33 28 17 14 12 18 28 25 55 29 1996 64 58 61 37 29 17 18 15 16 29 34 40 35 1997 39 27 37 26 21 17 17 13 17 25 59 69 31 1998 67 55 42 30 30 21 28 23 26 32 40 55 37 1999 59 39 40 34 25 19 25 21 26 33 56 62 37 2000 59 47 36 29 20 21 23 23 30 46 64 77 40 MEAN 65 54 45 38 31 23 24 25 26 36 47 61 40 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 18 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 1961 3 4 0 0 0 0 0 0 0 0 0 0 7 1962 0 0 0 0 0 0 0 0 0 0 0 0 0 1963 0 0 1 0 0 0 0 0 0 0 0 6 7 1964 28 1 0 0 0 0 0 0 0 0 3 16 48 1965 10 2 0 0 0 0 0 0 0 0 0 1 13 1966 0 0 0 0 0 0 0 0 0 0 0 0 0 1967 2 6 1 1 0 0 0 0 0 0 0 4 14 1968 6 6 0 0 0 0 0 0 0 0 0 0 12 1969 13 8 0 0 0 *** 0 0 0 0 0 0 *** 1970 4 1 0 0 0 0 0 0 0 0 0 2 7 1971 1 2 0 0 0 0 0 0 0 0 0 2 5 1972 24 18 0 0 0 0 0 0 0 0 0 11 53 1973 20 2 0 0 0 0 0 0 0 0 1 5 28 1974 19 11 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 0 0 0 0 0 0 0 *** 0 *** 1982 8 10 0 0 0 0 0 0 0 0 0 9 27 1983 12 5 *** 0 0 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 1 6 0 0 0 0 0 0 0 0 0 0 7 1992 12 3 4 0 0 0 0 0 0 0 0 *** *** 1993 7 *** 0 0 0 0 0 0 0 0 0 0 *** 1994 0 0 0 0 0 0 0 0 0 0 0 7 7 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 8 0 0 0 0 0 0 0 0 0 0 0 8 1997 1 4 1 0 0 0 0 0 0 0 0 0 6 1998 3 2 0 0 0 0 0 0 0 0 0 0 5 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 1 0 0 0 0 0 0 0 0 0 0 0 1 MEAN 7 4 0 0 0 0 0 0 0 0 0 3 14 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 19 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 1961 0 0 0 0 1 16 31 17 4 0 0 0 69 1962 0 0 0 0 0 12 30 15 2 0 0 0 59 1963 0 0 0 0 0 11 27 26 9 0 0 0 73 1964 0 0 0 0 4 21 30 28 11 0 0 0 94 1965 0 0 0 0 4 11 30 27 5 0 0 0 77 1966 0 0 0 0 1 22 27 31 8 0 0 0 89 1967 0 0 0 0 0 12 30 29 10 0 0 0 81 1968 0 0 0 0 0 6 28 24 6 0 0 0 64 1969 0 0 0 0 2 *** 23 21 3 0 0 0 *** 1970 0 0 0 0 3 15 27 30 9 0 0 0 84 1971 0 0 0 0 2 20 28 27 9 0 0 0 86 1972 0 0 0 0 0 6 29 11 8 0 0 0 54 1973 0 0 0 0 1 15 31 28 5 0 0 0 80 1974 0 0 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 0 1 6 12 23 4 0 *** 0 *** 1982 0 0 0 0 0 13 19 15 0 0 0 0 47 1983 0 0 *** 0 0 10 26 24 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 0 0 0 16 30 29 14 0 0 0 89 1992 0 0 0 0 0 10 31 22 0 0 0 *** *** 1993 0 *** 0 0 2 19 31 29 19 0 0 0 *** 1994 0 0 0 0 0 17 29 31 2 0 0 0 79 1995 0 0 0 0 0 12 31 30 13 0 0 0 86 1996 0 0 0 0 2 20 29 29 21 0 0 0 101 1997 0 0 0 0 2 22 31 31 9 1 0 0 96 1998 0 0 0 0 2 27 30 27 15 1 0 0 102 1999 0 0 0 0 8 26 24 31 19 0 0 0 108 2000 0 0 0 0 9 24 31 31 18 0 0 0 113 MEAN 0 0 0 0 2 16 28 26 9 0 0 0 81 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 20 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 1961 0 0 0 0 0 0 0 0 0 0 0 0 0 1962 0 0 0 0 0 0 0 0 0 0 0 0 0 1963 0 0 0 0 0 0 0 0 0 0 0 3 3 1964 11 0 0 0 0 0 0 0 0 0 0 0 11 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 0 0 1967 0 1 0 0 0 0 0 0 0 0 0 0 1 1968 0 1 0 0 0 0 0 0 0 0 0 0 1 1969 9 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 8 6 0 0 0 0 0 0 0 0 0 4 18 1973 5 0 0 0 0 0 0 0 0 0 0 0 5 1974 2 5 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 *** *** 0 0 0 0 0 *** 0 *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 4 0 *** 0 0 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 3 0 0 0 0 0 0 0 0 0 0 3 1992 5 0 1 0 0 0 0 0 0 0 0 *** *** 1993 2 *** 0 0 0 0 0 0 0 0 0 0 *** 1994 0 0 0 0 0 0 0 0 0 0 0 3 3 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 5 0 0 0 0 0 0 0 0 0 0 0 5 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 1998 1 1 1 0 0 0 0 0 0 0 0 0 3 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 MEAN 2 1 0 0 0 0 0 0 0 0 0 0 3 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 21 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 1961 0 0 0 0 9 25 31 30 11 0 0 0 106 1962 0 0 0 0 2 19 31 27 11 0 0 0 90 1963 0 0 0 0 0 25 31 31 21 0 0 0 108 1964 0 0 0 0 7 30 31 29 14 0 0 0 111 1965 0 0 0 0 12 27 31 29 13 0 0 0 112 1966 0 0 0 0 1 30 30 31 10 0 0 0 102 1967 0 0 0 0 2 20 30 31 12 0 0 0 95 1968 0 0 0 0 3 16 30 29 22 0 0 0 100 1969 0 0 0 0 4 *** 26 24 10 4 0 0 *** 1970 0 0 0 0 11 26 30 31 16 2 0 0 116 1971 0 0 0 0 7 25 31 30 13 0 0 0 106 1972 0 0 0 0 0 21 31 22 16 1 0 0 91 1973 0 0 0 0 6 24 31 31 18 0 0 0 110 1974 0 0 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 *** *** 8 23 26 11 0 *** 0 *** 1982 0 0 0 0 3 21 28 25 11 0 0 0 88 1983 0 0 *** 0 2 26 28 26 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 0 0 0 23 31 30 18 0 0 0 102 1992 0 0 0 0 0 13 31 24 2 0 0 *** *** 1993 0 *** 0 0 0 20 31 29 19 0 0 0 *** 1994 0 0 0 0 4 25 31 31 5 0 0 0 96 1995 0 0 0 0 0 19 31 31 16 0 0 0 97 1996 0 0 0 0 4 24 31 29 23 0 0 0 111 1997 0 0 0 0 6 25 31 31 11 0 0 0 104 1998 0 0 0 0 1 26 30 28 17 1 0 0 103 1999 0 0 0 0 8 29 25 31 19 0 0 0 112 2000 0 0 0 0 12 24 31 31 19 0 0 0 117 MEAN 0 0 0 0 4 23 30 29 14 0 0 0 100 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 22 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 1961 0 0 0 0 0 0 0 0 0 0 0 0 0 1962 0 0 0 0 0 0 0 0 0 0 0 0 0 1963 0 0 0 0 0 0 0 0 0 0 0 0 0 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 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 *** 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 1 0 0 0 0 0 1 1974 0 0 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 *** *** 0 0 0 0 0 *** 0 *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 0 0 *** 0 0 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 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 *** *** 1993 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 1 0 0 0 0 0 1 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 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 0 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 23 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 1961 0 0 0 0 0 0 0 0 0 0 0 0 0 1962 0 0 0 0 0 0 0 0 0 0 0 0 0 1963 0 0 0 0 0 0 0 0 0 0 0 0 0 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 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 *** 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 0 0 1974 0 0 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 *** *** 0 0 0 0 0 *** 0 *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 0 0 *** 0 0 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 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 *** *** 1993 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 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 0 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 24 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 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 -------------- 1961 23 14 11 0 0 0 0 0 0 0 7 5 60 11 24 3 18 1962 16 7 1 0 0 0 0 0 0 0 8 11 43 11 17 3 13 1963 6 8 4 0 0 0 0 0 0 0 3 15 36 11 28 3 10 1964 30 16 0 0 0 0 0 0 0 0 4 29 79 11 27 2 28 1965 26 16 4 1 0 0 0 0 0 0 0 8 55 12 19 4 6 1966 2 0 2 0 0 0 0 0 0 0 0 5 9 12 22 3 24 1967 21 17 7 2 0 0 0 0 0 0 3 13 63 11 28 4 2 1968 16 15 3 0 0 0 0 0 0 0 0 4 38 12 13 3 25 1969 23 18 1 1 0 *** 0 0 0 0 7 5 *** 11 16 4 14 1970 19 8 0 0 0 0 0 0 0 0 0 18 45 12 10 2 24 1971 18 14 2 0 0 0 0 0 0 0 0 10 44 12 18 3 16 1972 31 27 9 0 0 0 0 0 0 0 0 20 87 12 2 3 28 1973 31 10 4 0 0 0 0 0 0 0 12 21 78 11 7 3 30 1974 31 24 6 0 *** *** *** *** *** *** *** *** *** 1 1 3 10 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1981 6 *** 1 0 0 0 0 0 0 0 *** 1 *** 12 20 3 4 1982 12 21 9 0 0 0 0 0 0 0 1 20 63 11 30 3 26 1983 19 15 *** 0 0 0 0 0 *** *** *** *** *** 1 1 2 28 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1991 18 15 2 0 0 0 0 0 0 0 0 16 51 12 16 3 12 1992 24 17 12 0 0 0 0 0 0 0 2 *** *** 11 27 3 25 1993 26 *** 6 0 0 0 0 0 0 0 4 3 *** 11 14 3 23 1994 6 8 0 0 0 0 0 0 0 0 0 16 30 12 5 2 20 1995 4 3 0 0 0 0 0 0 0 0 1 12 20 11 26 2 26 1996 19 6 5 0 0 0 0 0 0 0 0 0 30 1 10 3 20 1997 7 14 6 0 0 0 0 0 0 0 0 3 30 12 27 3 21 1998 20 12 3 0 0 0 0 0 0 0 0 0 35 1 3 3 3 1999 10 2 2 0 0 0 0 0 0 0 2 3 19 11 12 3 19 2000 14 9 2 0 0 0 0 0 0 0 0 0 25 1 9 3 16 MEAN 18 13 4 0 0 0 0 0 0 0 2 10 47 11 7 4 14 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 25 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 2.3 4.0 8.3 14.0 24.2 28.0 31.2 27.7 24.6 17.0 10.3 6.9 16.5 1962 3.7 6.6 12.8 13.6 21.8 26.4 29.9 27.2 22.9 17.7 8.8 5.9 16.4 1963 7.3 8.5 9.6 16.4 18.5 27.8 31.0 28.8 25.9 19.3 10.3 2.2 17.1 1964 -4.2 4.5 11.8 13.7 23.1 28.5 31.7 30.3 24.9 16.0 9.6 0.7 15.9 1965 0.1 4.5 9.5 14.0 23.0 27.4 29.8 29.0 23.5 17.1 12.0 6.3 16.4 1966 7.9 8.5 9.8 15.2 21.5 28.9 29.7 29.8 24.4 16.0 11.3 6.6 17.5 1967 3.7 2.6 8.4 12.5 21.3 25.9 30.1 29.7 24.6 17.1 11.2 4.8 16.0 1968 2.6 3.8 9.3 14.4 20.5 25.6 29.3 29.0 25.3 18.4 10.3 5.5 16.2 1969 -0.8 1.2 10.2 14.3 21.4 ****** 28.7 27.3 22.7 18.0 7.6 6.5 ****** 1970 2.3 7.4 9.5 17.7 23.2 28.4 29.4 30.2 24.3 18.0 13.3 4.1 17.3 1971 3.2 4.2 11.4 13.9 23.5 27.7 30.5 29.7 24.0 17.4 10.5 5.6 16.8 1972 -2.3 -0.8 6.3 16.8 17.3 26.3 29.8 26.1 25.2 20.5 10.8 0.5 14.7 1973 -1.3 6.7 9.5 15.0 21.6 28.5 30.7 29.6 24.1 19.8 9.7 3.3 16.4 1974 -1.0 0.2 9.9 13.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 5.0 ****** 13.4 16.1 ****** 25.3 29.7 29.2 24.5 17.4 ****** 8.1 ****** 1982 3.6 1.6 7.4 18.9 22.6 27.5 29.5 27.8 24.3 ****** 7.6 1.0 ****** 1983 -0.8 4.1 ****** 13.8 21.7 28.4 31.3 30.2 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.0 2.7 8.3 17.1 20.2 26.8 30.2 29.5 25.0 17.9 11.5 4.3 16.4 1992 0.2 3.1 4.9 14.1 16.8 26.0 31.2 27.1 23.2 17.7 12.0 ****** ****** 1993 0.9 ****** 7.7 15.8 20.3 27.2 29.6 28.9 26.3 16.3 7.7 6.4 ****** 1994 5.2 4.9 11.3 17.1 21.1 27.1 31.0 30.8 22.5 16.5 11.7 2.9 16.8 1995 6.3 6.9 11.0 16.0 20.6 26.4 32.4 32.0 24.9 17.3 12.8 3.4 17.5 1996 1.6 5.8 6.0 14.3 22.1 27.7 29.3 29.8 27.2 17.7 10.8 7.8 16.7 1997 6.1 5.2 7.5 15.3 21.6 27.9 32.0 31.6 25.2 20.2 10.1 5.5 17.3 1998 1.8 4.1 9.5 17.5 21.3 28.9 30.5 29.7 25.8 19.2 15.0 10.3 17.8 1999 4.6 8.8 10.0 16.5 23.5 29.1 28.7 30.4 25.5 20.0 9.4 6.8 17.8 2000 4.0 5.7 9.7 19.7 25.1 28.4 30.1 30.0 26.5 16.8 8.9 5.5 17.5 MEAN 2.4 4.6 9.3 15.5 21.5 27.4 30.3 29.3 24.7 17.9 10.5 5.0 16.5 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 26 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 -2.3 -3.7 -7.1 0.3 -0.3 1.9 4.9 4.5 2.8 -3.7 -5.9 -4.6 -1.1 1962 -4.5 -5.3 -5.3 1.0 2.6 3.1 4.7 4.3 -0.7 -0.6 -4.4 -2.4 -0.6 1963 -3.1 -5.5 -6.8 0.2 3.2 0.6 5.2 5.5 -0.9 0.6 -2.6 -4.2 -0.6 1964 -14.5 -4.6 -3.1 -4.6 -3.8 1.4 5.4 1.9 -0.1 -4.2 -4.9 -5.7 -3.1 1965 -3.7 -5.8 -2.1 -3.7 -1.5 1.4 4.0 2.1 1.5 3.1 -1.9 -5.8 -1.0 1966 -3.4 -4.8 -2.9 0.3 1.6 0.3 3.9 2.9 1.6 4.9 -4.7 -4.3 -0.4 1967 -5.6 -5.4 -6.7 -2.0 1.5 -1.3 5.7 2.1 2.0 0.1 0.6 -5.2 -1.2 1968 -6.2 -5.1 -3.2 1.0 3.7 3.6 4.0 5.1 -2.0 0.1 4.0 -1.1 0.3 1969 -5.1 -3.6 2.8 1.9 3.6 ****** 8.5 6.0 1.9 3.7 -2.6 -2.6 ****** 1970 -3.3 -5.9 -2.7 -0.3 -0.3 1.7 7.2 6.0 2.0 -4.0 -2.1 -4.0 -0.5 1971 -5.4 -5.3 -2.3 1.1 3.4 3.1 5.2 3.7 1.7 -1.9 0.4 -4.3 -0.0 1972 -5.6 -5.1 -1.5 0.3 4.4 5.0 5.9 4.2 -0.2 -1.1 -2.8 -5.1 -0.1 1973 -7.8 -3.1 -6.8 -3.8 -0.3 2.0 6.5 5.0 3.0 -2.3 -6.6 -6.8 -1.7 1974 -4.8 -4.1 0.9 -0.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 3.5 ****** 11.0 13.9 ****** 19.2 24.9 24.3 17.9 11.2 ****** 2.7 ****** 1982 0.4 -0.2 3.1 12.8 16.7 19.0 15.0 17.1 13.9 ****** 5.6 -0.4 ****** 1983 -3.7 0.1 ****** 8.0 12.8 16.0 18.4 20.1 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 -3.3 -5.2 0.4 -2.0 -0.5 0.4 3.3 2.6 3.0 0.9 -2.0 -4.8 -0.6 1992 -7.4 -7.6 -5.2 -2.5 2.6 1.9 2.9 3.8 -1.6 -2.5 -2.3 ****** ****** 1993 -7.0 ****** -7.4 -2.6 0.2 -1.2 4.3 4.1 0.4 -2.9 1.1 -0.9 ****** 1994 -2.1 -5.6 -4.1 -1.2 -0.6 0.7 4.4 2.3 0.0 3.0 0.9 -6.6 -0.7 1995 -4.9 -4.5 -6.1 0.3 1.6 2.6 4.2 1.9 0.5 -0.8 -6.9 -5.1 -1.4 1996 -4.9 -1.7 -1.4 0.0 4.1 1.8 4.2 2.4 -0.2 -0.2 -4.3 -4.6 -0.4 1997 -6.4 -11.1 -5.8 -3.4 -0.8 3.5 6.6 1.7 -1.0 -0.4 1.5 -0.5 -1.3 1998 -4.3 -4.3 -3.1 0.5 3.4 6.5 11.8 8.6 5.7 2.7 1.0 0.8 2.4 1999 -2.4 -4.3 -2.9 2.3 3.9 5.1 9.2 7.3 5.7 3.2 0.8 -1.0 2.2 2000 -4.0 -4.5 -3.9 2.4 3.0 6.0 8.9 8.8 8.3 4.6 1.9 1.0 2.7 MEAN -4.5 -4.6 -2.8 0.7 2.6 4.2 7.3 6.1 2.6 0.6 -1.5 -3.1 0.6 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 27 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 3.87 3.50 2.85 4.72 4.57 5.17 6.45 6.28 5.63 3.60 3.06 3.27 4.41 1962 3.28 3.22 3.13 5.06 5.45 5.80 6.30 6.23 4.60 4.36 3.56 3.92 4.58 1963 3.66 3.13 2.92 4.71 5.83 4.89 6.53 6.81 4.38 4.82 3.89 3.44 4.58 1964 1.74 3.24 3.72 3.36 3.57 5.14 6.63 5.36 4.71 3.38 3.19 3.01 3.92 1965 3.48 3.02 4.03 3.50 4.21 5.13 6.04 5.28 5.06 5.76 4.09 3.00 4.38 1966 3.57 3.27 3.79 4.74 5.31 4.75 6.03 5.59 5.22 6.39 3.27 3.32 4.60 1967 3.03 3.15 2.79 4.08 5.12 4.28 6.85 5.38 5.26 4.69 4.81 3.23 4.39 1968 3.02 3.20 3.73 4.88 6.08 5.92 6.06 6.73 4.10 4.64 6.04 4.21 4.88 1969 3.20 3.58 5.62 5.25 5.87 ****** 8.22 6.97 5.25 6.00 3.89 3.82 ****** 1970 3.59 2.96 3.79 4.46 4.56 5.20 7.54 7.19 5.48 3.45 3.94 3.43 4.63 1971 3.15 3.13 3.99 5.02 5.77 5.75 6.51 5.95 5.17 4.05 4.78 3.40 4.72 1972 3.01 3.21 4.09 4.70 6.19 6.63 6.99 6.22 4.55 4.37 3.78 3.35 4.76 1973 2.71 3.65 2.92 3.58 4.62 5.55 7.20 6.50 5.63 3.84 2.99 2.80 4.33 1974 3.18 3.41 4.92 4.55 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****