STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.4 10.2 13.2 19.6 24.4 30.1 36.0 35.7 31.8 24.7 13.0 8.8 21.4 MINIMUN AIR TEMPERATURE (C) 2.9 4.3 6.4 11.1 12.8 17.0 22.7 22.1 19.0 14.4 7.7 2.8 11.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 1 27 25 7 1 0 0 63 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 7 0 0 0 0 0 0 0 0 0 0 7 14 TEMPERATURE RECORDS LOWEST(C) -3.8 0.5 0.2 4.0 8.5 13.0 16.0 19.0 15.0 7.0 2.0 -2.4 -3.8 DAY 20 2 3 4 14 1 1 16 7 25 15 5 MAXIMUM AIR TEMPERATURE (C) 14.6 14.8 17.9 24.7 30.1 36.6 43.2 42.6 39.2 31.1 18.0 13.8 27.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 16 29 30 31 30 24 1 0 161 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.5 20.0 25.0 29.0 37.5 40.5 47.0 47.5 42.0 36.0 30.0 21.0 47.5 DAY 4 24 28 24 28 26 4 1 5 1 1 26 DIF. BETWEEN (MAX.-MIN.) (C) 11.7 10.5 11.5 13.6 17.3 19.6 20.5 20.5 20.2 16.7 10.3 11.0 15.3 MEAN DAILY TEMP. (MDT) (C) 8.7 9.6 12.1 17.9 21.4 26.8 32.9 32.3 29.1 22.8 12.8 8.3 19.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 3.1 51.9 168.3 357.9 351.8 242.5 66.6 1.5 0.0 1243.7 HEATING DEG. DAYS(BASE 18 0C) 286.7 236.4 183.1 28.0 3.8 0.0 0.0 0.0 0.0 2.0 165.4 299.3 1204.7 DEWPOINT (MEAN C) 0.6 3.8 4.2 10.2 7.3 3.0 8.4 4.2 1.6 4.5 5.7 0.0 4.4 MIXING RATIO (G/KG) 4.32 5.38 5.69 8.42 7.12 5.25 7.84 5.82 4.78 5.76 6.23 4.21 5.90 VAPOUR PRESSURE (HPA) 6.58 8.15 8.60 12.65 10.68 7.87 11.65 8.71 7.21 8.71 9.43 6.41 8.89 SATURATION DEF. (HPA) 5.75 4.79 7.27 10.99 21.95 37.16 50.66 52.74 42.68 24.01 6.35 5.38 22.48 RELATIVE HUMIDITY (MEAN %) 58 67 58 58 40 21 21 16 17 31 67 59 43 RELATIVE HUMIDITY (MAX. %) 80 87 80 83 69 44 40 32 30 50 86 83 64 RELATIVE HUMIDITY (MIN. %) 38 51 41 41 23 11 12 8 8 17 45 38 28 RELATIVE HUMIDITY (MEAN% 03UTC) 74 85 77 81 67 44 37 31 28 48 81 75 61 RELATIVE HUMIDITY (MEAN% 09UTC) 46 55 48 47 28 14 17 12 11 22 52 46 33 RELATIVE HUMIDITY (MEAN% 15UTC) 58 63 55 52 35 13 15 10 12 24 63 55 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 15.0 46.0 32.0 58.5 90.0 0.0 0.0 0.0 0.0 10.0 156.0 57.0 464.5 DAYS WITH PRECIPITATION >=10 0 1 0 2 3 0 0 0 0 0 5 1 12 DAYS WITH PRECIPITATION >= 5 2 3 2 6 3 0 0 0 0 2 9 3 30 DAYS WITH PRECIPITATION >= 1 4 10 7 9 9 0 0 0 0 2 14 7 62 DAYS WITH PRECIPITATION 4 10 10 10 9 0 0 0 0 2 14 7 66 GREATEST DAILY PRECIPITATION 7.0 16.0 8.0 13.0 40.0 0.0 0.0 0.0 0.0 5.0 54.0 29.0 54.0 DAY 29 15 8 10 4 ** ** ** ** 21 29 1 DAY WITH THUNDER STORM 0 0 1 7 6 1 0 0 0 4 2 2 23 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 0 1 0 2 0 0 2 7 2 0 0 15 WIND DIRECTION (PREVAILING) 180 135 135 135 135 225 225 270 315 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 14.0 14.9 17.9 14.1 8.4 13.9 11.3 10.1 8.2 7.3 8.3 9.8 10.0 PREVAILING WIND PERCENT 8.7 10.7 9.0 9.3 11.7 15.9 21.7 14.5 14.4 12.4 8.3 11.8 9.0 CALMS PERCENT OF WIND 68.7 67.1 61.9 72.7 52.8 49.4 42.8 43.5 41.7 46.8 65.0 56.5 55.0 NO. OF WIND OBSERVATION 150 140 155 150 163 176 180 186 180 186 180 186 2032 VECTOR WIND DIRECTION (MEAN) 213 165 186 158 180 259 252 280 248 196 188 140 213 VECTOR WIND MAGNITUDE(KNOTS) 1.5 1.9 1.6 1.7 1.9 4.5 3.8 1.4 0.7 1.4 1.3 1.9 1.4 WIND STEADINESES (MEAN %) 40.5 50.0 30.2 47.2 34.5 67.2 63.3 26.9 14.9 31.8 48.1 45.2 29.8 WIND SPEED (MEAN KNOTS) 3.7 3.8 5.3 3.6 5.5 6.7 6.0 5.2 4.7 4.4 2.7 4.2 4.7 FASTEST WIND DIRECTION 110 120 240 180 170 240 210 290 120 160 180 180 120 FASTEST WIND SPEED (KNOTS) 29 39 39 39 29 39 39 19 19 19 29 23 39 DAY 22 5 16 3 1 6 6 2 1 1 2 27 DAYS WITH SKY CLEAR (0-2)/8 13 11 10 5 15 28 25 29 29 14 9 15 203 DAYS WITH P.CLOUDY (3-6)/8 10 7 6 15 14 2 5 2 1 15 10 11 98 DAYS WITH CLOUDY (7-8)/8 7 10 15 10 2 0 0 0 0 2 11 5 62 DAYS WITH VISIBILITY =< 2 KM 1 0 1 0 0 1 0 1 0 0 2 2 8 DURATION OF SUNSHINE HOURS 153.3 162.0 120.8 157.4 209.4 314.0 316.8 319.4 251.6 193.8 135.7 155.7 2489.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 954.2 951.0 949.4 947.0 945.8 940.5 938.9 940.0 946.1 950.6 952.1 954.6 947.5 MAX. QFE PRESSURE IN HPA 959.9 957.7 956.8 953.0 951.4 949.8 943.9 944.4 952.3 956.6 958.6 960.5 960.5 DAY-HOUR 24- 6 22- 6 4- 6 5- 6 17- 9 2- 9 27- 3 17- 3 23- 6 15- 6 20- 6 23- 6 MIN. QFE PRESSURE IN HPA 942.4 941.2 943.0 937.1 936.0 934.5 934.4 932.0 937.8 940.0 942.6 941.5 932.0 DAY-HOUR 18-12 5-15 31- 3 25-12 3-15 25-12 19-15 5-15 10-12 1-15 8-12 27-12 MEAN QNH PRESSURE IN HPA 1018.0 1014.6 1012.9 1010.3 1009.1 1003.5 1001.9 1003.0 1009.4 1014.2 1015.7 1018.3 1010.9 MAX. QNH PRESSURE IN HPA 1024.0 1021.6 1020.7 1016.7 1015.0 1013.3 1007.1 1007.6 1015.9 1020.5 1022.6 1024.6 1024.6 DAY-HOUR 24- 6 22- 6 4- 6 5- 6 17- 9 2- 9 27- 3 17- 3 23- 6 15- 6 20- 6 23- 6 MIN. QNH PRESSURE IN HPA 1005.5 1004.2 1006.1 999.9 998.8 997.2 997.1 994.5 1000.7 1003.0 1005.7 1004.6 994.5 DAY-HOUR 18-12 5-15 31- 3 25-12 3-15 25-12 19-15 5-15 10-12 1-15 8-12 27-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.4 1005.8 1012.0 1015.8 1019.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.8 1012.3 1018.4 1023.7 1026.7 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 17- 3 23- 6 26- 6 20- 6 4- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 989.7 999.0 999.2 1005.1 1005.4 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 5-15 5-15 1-15 8-15 27-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 954.5 951.1 949.3 946.8 946.0 941.2 939.2 940.5 946.8 950.6 952.1 954.5 947.7 MAX. QFE PRESSURE IN HPA 959.5 956.9 955.6 952.4 951.3 948.9 943.9 944.4 951.6 955.0 957.7 960.3 960.3 DAY 23 22 4 5 18 2 27 17 23 16 15 23 MIN. QFE PRESSURE IN HPA 946.3 943.1 943.0 938.0 940.0 936.1 936.4 934.9 942.0 941.2 943.3 943.9 934.9 DAY 11 6 31 10 4 26 19 6 6 1 8 27 MEAN QNH PRESSURE IN HPA 1018.3 1014.6 1012.8 1010.1 1009.3 1004.3 1002.1 1003.5 1010.1 1014.2 1015.7 1018.3 1011.1 MAX. QNH PRESSURE IN HPA 1023.5 1020.8 1019.4 1016.0 1014.9 1012.4 1007.1 1007.6 1015.2 1018.8 1021.6 1024.4 1024.4 DAY 23 22 4 5 18 2 27 17 23 16 15 23 MIN. QNH PRESSURE IN HPA 1009.6 1006.2 1006.1 1000.9 1003.0 998.9 999.2 997.6 1005.1 1004.2 1006.5 1007.1 997.6 DAY 11 6 31 10 4 26 19 6 6 1 8 27 MEAN QFF PRESSURE IN HPA 1019.2 1015.4 1012.9 1008.8 1007.2 1001.0 997.6 999.0 1006.3 1011.8 1015.7 1019.4 1009.5 MAX. QFF PRESSURE IN HPA 1025.9 1021.3 1020.4 1015.0 1013.4 1009.6 1003.1 1003.8 1011.9 1017.0 1022.6 1026.3 1026.3 DAY 23 22 4 5 18 2 27 17 23 26 15 4 MIN. QFF PRESSURE IN HPA 1009.3 1006.1 1004.5 999.7 1000.1 994.8 994.2 992.0 1000.7 1000.7 1005.8 1006.0 992.0 DAY 11 6 31 10 29 26 8 6 5 1 8 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 955.3 951.9 950.1 947.8 946.6 941.2 939.8 940.9 947.1 951.5 952.8 955.2 948.3 MAX. QFE PRESSURE IN HPA 959.9 957.7 956.8 953.0 951.2 949.6 943.8 944.1 952.3 956.6 958.6 960.5 960.5 DAY 24 22 4 5 17 2 27 17 23 15 20 23 MIN. QFE PRESSURE IN HPA 947.0 944.9 944.0 939.6 940.4 936.3 936.8 936.0 942.7 940.5 943.7 943.5 936.0 DAY 14 6 31 28 3 26 20 6 6 1 8 27 MEAN QNH PRESSURE IN HPA 1019.1 1015.5 1013.7 1011.1 1009.9 1004.2 1002.7 1003.9 1010.5 1015.1 1016.5 1019.0 1011.8 MAX. QNH PRESSURE IN HPA 1024.0 1021.6 1020.7 1016.7 1014.8 1013.1 1007.0 1007.3 1015.9 1020.5 1022.6 1024.6 1024.6 DAY 24 22 4 5 17 2 27 17 23 15 20 23 MIN. QNH PRESSURE IN HPA 1010.4 1008.1 1007.2 1002.6 1003.4 999.1 999.6 998.8 1005.8 1003.5 1006.9 1006.7 998.8 DAY 14 6 31 28 3 26 20 6 6 1 8 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1000.4 997.8 999.1 1006.7 1012.8 1016.6 1020.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1009.7 1002.5 1003.0 1012.3 1018.4 1023.7 1026.7 ****** DAY ** ** ** ** ** 2 27 31 23 26 20 4 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 994.9 994.1 993.3 1001.8 999.6 1006.1 1005.7 ****** DAY ** ** ** ** ** 26 20 6 6 1 8 27 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 954.5 951.6 950.0 947.8 946.5 940.9 939.3 940.5 946.5 950.9 952.3 954.8 948.0 MAX. QFE PRESSURE IN HPA 959.2 956.9 956.5 952.8 951.4 949.8 943.8 943.9 952.1 956.3 958.1 960.2 960.2 DAY 22 22 4 4 17 2 27 31 23 15 20 23 MIN. QFE PRESSURE IN HPA 945.2 946.0 944.0 941.3 940.6 935.9 936.2 934.5 939.7 940.7 943.0 942.3 934.5 DAY 18 6 31 27 3 26 21 5 10 1 8 27 MEAN QNH PRESSURE IN HPA 1018.2 1015.2 1013.5 1011.2 1009.9 1003.9 1002.3 1003.5 1009.8 1014.5 1016.0 1018.6 1011.4 MAX. QNH PRESSURE IN HPA 1023.2 1020.8 1020.4 1016.5 1015.0 1013.3 1007.0 1007.1 1015.7 1020.2 1022.1 1024.3 1024.3 DAY 22 22 4 4 17 2 27 31 23 15 20 23 MIN. QNH PRESSURE IN HPA 1008.5 1009.3 1007.2 1004.3 1003.6 998.7 999.0 997.2 1002.7 1003.7 1006.1 1005.4 997.2 DAY 18 6 31 27 3 26 21 5 10 1 8 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 953.2 950.2 948.8 946.5 945.5 940.0 938.2 939.3 945.4 949.7 951.5 953.8 946.8 MAX. QFE PRESSURE IN HPA 959.4 955.3 955.5 951.9 950.2 947.8 941.6 943.8 950.4 955.5 957.6 959.7 959.7 DAY 22 22 3 5 17 2 27 29 23 15 15 23 MIN. QFE PRESSURE IN HPA 942.4 943.7 943.2 937.1 937.6 934.5 934.7 933.6 937.8 940.4 942.6 941.5 933.6 DAY 18 9 24 25 3 25 21 5 10 1 8 27 MEAN QNH PRESSURE IN HPA 1016.9 1013.7 1012.3 1009.9 1008.8 1003.0 1001.1 1002.3 1008.6 1013.2 1015.1 1017.5 1010.2 MAX. QNH PRESSURE IN HPA 1023.4 1019.1 1019.3 1015.5 1013.7 1011.2 1004.7 1007.0 1013.9 1019.3 1021.5 1023.7 1023.7 DAY 22 22 3 5 17 2 27 29 23 15 15 23 MIN. QNH PRESSURE IN HPA 1005.5 1006.9 1006.3 999.9 1000.4 997.2 997.4 996.2 1000.7 1003.4 1005.7 1004.6 996.2 DAY 18 9 24 25 3 25 21 5 10 1 8 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 953.7 950.5 948.7 946.0 944.9 939.6 938.0 939.0 945.0 950.0 951.6 954.2 946.8 MAX. QFE PRESSURE IN HPA 959.0 955.5 955.5 951.1 950.1 947.6 941.3 942.7 950.4 955.3 957.5 959.7 959.7 DAY 22 21 3 5 18 2 27 16 23 15 20 23 MIN. QFE PRESSURE IN HPA 945.2 941.2 943.1 937.1 936.0 934.9 934.4 932.0 940.3 940.0 942.8 943.1 932.0 DAY 18 5 15 25 3 26 19 5 5 1 8 27 MEAN QNH PRESSURE IN HPA 1017.4 1014.0 1012.1 1009.3 1008.1 1002.6 1000.8 1002.0 1008.3 1013.6 1015.2 1017.9 1010.1 MAX. QNH PRESSURE IN HPA 1023.0 1019.3 1019.3 1014.7 1013.6 1011.0 1004.3 1005.8 1013.9 1019.1 1021.4 1023.7 1023.7 DAY 22 21 3 5 18 2 27 16 23 15 20 23 MIN. QNH PRESSURE IN HPA 1008.5 1004.2 1006.2 999.9 998.8 997.6 997.1 994.5 1003.3 1003.0 1005.9 1006.2 994.5 DAY 18 5 15 25 3 26 19 5 5 1 8 27 MEAN QFF PRESSURE IN HPA 1018.4 1014.7 1012.2 1007.9 1005.9 999.3 996.3 997.5 1004.5 1011.2 1015.3 1019.0 1008.5 MAX. QFF PRESSURE IN HPA 1025.0 1019.9 1020.5 1013.8 1012.1 1008.1 1000.2 1002.1 1010.7 1016.6 1022.4 1025.5 1025.5 DAY 22 21 3 4 18 2 27 16 23 15 20 31 MIN. QFF PRESSURE IN HPA 1009.5 1004.5 1005.9 998.6 997.8 993.5 992.4 989.7 999.0 999.2 1005.1 1005.4 989.7 DAY 18 5 24 25 3 26 21 5 5 1 8 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 940.3 939.3 939.9 946.0 950.9 952.1 955.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 948.4 942.9 943.0 951.5 956.0 957.7 960.2 ****** DAY ** ** ** ** ** 2 27 17 23 15 14 3 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 935.2 935.8 933.6 941.8 941.1 943.6 947.1 ****** DAY ** ** ** ** ** 12 19 5 4 1 29 26 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1003.3 1002.2 1002.9 1009.4 1014.5 1015.8 1018.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1011.8 1006.0 1006.1 1015.1 1019.8 1021.6 1024.3 ****** DAY ** ** ** ** ** 2 27 17 23 15 14 3 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 997.9 998.6 996.2 1004.9 1004.1 1006.8 1010.5 ****** DAY ** ** ** ** ** 12 19 5 4 1 29 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 999.4 997.3 998.1 1005.7 1012.2 1015.9 1020.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1008.3 1001.6 1001.7 1012.1 1017.8 1022.6 1026.7 ****** DAY ** ** ** ** ** 2 27 17 23 15 14 3 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 993.5 993.1 990.9 1000.7 999.9 1006.5 1009.8 ****** DAY ** ** ** ** ** 26 19 5 5 1 29 26 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.3 12.3 11.6 18.0 27.1 32.0 35.0 34.0 29.7 21.6 16.1 10.5 21.4 MINIMUN AIR TEMPERATURE (C) 1.7 5.0 6.0 8.1 15.0 18.6 23.0 21.6 18.1 14.3 8.2 6.0 12.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 9 27 16 4 0 0 0 58 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 12 1 0 0 0 0 0 0 0 0 0 1 14 TEMPERATURE RECORDS LOWEST(C) -1.0 0.0 0.5 1.5 9.5 14.0 19.0 16.2 14.2 8.5 2.0 -1.6 -1.6 DAY 2 12 21 22 3 3 10 28 21 9 11 31 MAXIMUM AIR TEMPERATURE (C) 16.2 18.4 15.9 24.5 34.2 39.0 41.5 40.8 37.0 27.0 22.6 14.9 27.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 28 30 31 31 30 10 0 0 163 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.5 26.0 22.0 35.0 39.0 44.0 44.0 45.0 40.6 35.5 27.7 21.2 45.0 DAY 23 2 8 30 21 27 23 3 5 2 18 1 DIF. BETWEEN (MAX.-MIN.) (C) 14.5 13.4 9.9 16.4 19.2 20.4 18.5 19.2 18.9 12.7 14.4 8.9 15.6 MEAN DAILY TEMP. (MDT) (C) 9.0 11.7 11.0 16.3 24.6 28.8 32.3 31.2 27.5 20.7 15.4 10.4 19.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.2 113.7 235.0 349.0 315.3 196.2 36.8 0.1 0.0 1248.4 HEATING DEG. DAYS(BASE 18 0C) 280.4 176.0 218.2 72.1 0.0 0.0 0.0 0.0 0.0 14.4 83.9 234.1 1079.1 DEWPOINT (MEAN C) -0.1 2.9 5.0 6.2 5.5 1.1 5.4 4.0 3.8 7.6 3.5 3.9 4.1 MIXING RATIO (G/KG) 4.10 5.09 5.96 6.58 6.40 4.58 6.19 5.61 5.53 7.34 5.45 5.53 5.70 VAPOUR PRESSURE (HPA) 6.25 7.72 8.99 9.92 9.63 6.88 9.25 8.39 8.33 11.07 8.28 8.40 8.59 SATURATION DEF. (HPA) 6.15 7.32 5.05 12.21 28.46 43.51 49.53 48.54 35.83 15.96 10.91 4.79 22.36 RELATIVE HUMIDITY (MEAN %) 57 58 67 51 31 17 18 18 22 47 49 68 42 RELATIVE HUMIDITY (MAX. %) 80 83 87 78 58 35 33 33 36 66 74 85 62 RELATIVE HUMIDITY (MIN. %) 32 36 46 29 15 8 10 9 11 30 27 50 25 RELATIVE HUMIDITY (MEAN% 03UTC) 76 79 84 71 56 35 33 34 35 63 73 77 60 RELATIVE HUMIDITY (MEAN% 09UTC) 41 43 55 35 19 10 13 12 14 36 33 58 31 RELATIVE HUMIDITY (MEAN% 15UTC) 50 49 61 46 24 10 12 11 17 45 44 67 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 13.0 59.1 207.0 13.0 5.0 0.0 0.0 0.0 0.0 111.2 17.1 210.6 636.0 DAYS WITH PRECIPITATION >=10 0 2 5 1 0 0 0 0 0 2 1 5 16 DAYS WITH PRECIPITATION >= 5 1 5 8 1 0 0 0 0 0 3 2 6 26 DAYS WITH PRECIPITATION >= 1 4 7 15 2 3 0 0 0 0 8 2 9 50 DAYS WITH PRECIPITATION 4 8 16 2 3 0 0 0 0 10 3 14 60 GREATEST DAILY PRECIPITATION 6.0 19.0 75.0 10.0 3.0 0.0 0.0 0.0 0.0 64.0 10.0 67.0 75.0 DAY 26 4 4 18 11 ** ** ** ** 25 3 23 DAY WITH THUNDER STORM 1 6 5 3 1 0 0 0 0 10 0 5 31 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 1 5 7 7 15 8 3 4 1 0 0 51 WIND DIRECTION (PREVAILING) 135 135 135 180 135 270 270 270 270 90 135 135 135 PREVAILING WIND SPEED(KNOTS) 5.6 8.5 6.5 13.4 12.4 12.6 9.5 9.6 7.6 12.1 9.8 8.4 9.2 PREVAILING WIND PERCENT 8.1 12.5 14.0 8.3 21.0 18.9 19.4 21.8 15.6 13.2 17.8 12.4 11.1 CALMS PERCENT OF WIND 69.4 56.5 51.6 53.9 45.7 43.3 41.4 47.3 55.3 48.9 55.6 59.1 52.4 NO. OF WIND OBSERVATION 186 168 186 180 186 180 186 165 179 182 180 186 2164 VECTOR WIND DIRECTION (MEAN) 209 170 181 203 182 254 239 279 260 132 130 140 204 VECTOR WIND MAGNITUDE(KNOTS) 0.6 1.5 1.6 1.8 2.7 3.5 1.6 2.6 1.8 1.4 2.5 1.6 1.2 WIND STEADINESES (MEAN %) 31.6 42.9 47.1 42.9 42.2 50.0 26.2 56.5 54.5 30.4 65.8 53.3 27.9 WIND SPEED (MEAN KNOTS) 1.9 3.5 3.4 4.2 6.4 7.0 6.1 4.6 3.3 4.6 3.8 3.0 4.3 FASTEST WIND DIRECTION 140 160 120 220 150 180 120 120 200 100 120 110 120 FASTEST WIND SPEED (KNOTS) 16 39 19 29 39 29 49 23 17 21 29 23 49 DAY 23 25 25 25 10 17 27 6 5 9 30 19 DAYS WITH SKY CLEAR (0-2)/8 15 10 6 18 16 29 29 26 27 13 18 7 214 DAYS WITH P.CLOUDY (3-6)/8 11 12 10 9 9 1 1 5 3 13 6 9 89 DAYS WITH CLOUDY (7-8)/8 5 6 15 3 6 0 0 0 0 5 6 15 61 DAYS WITH VISIBILITY =< 2 KM 0 0 3 0 1 2 3 2 2 1 1 1 16 DURATION OF SUNSHINE HOURS 176.0 151.1 98.5 207.8 187.9 235.1 275.2 313.7 281.8 204.3 216.7 111.1 2459.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 955.9 952.3 948.2 949.8 946.4 942.5 939.7 940.4 945.2 950.0 953.6 954.5 948.2 MAX. QFE PRESSURE IN HPA 962.2 959.9 953.2 958.1 952.5 947.3 944.4 943.9 950.8 956.6 960.5 961.2 962.2 DAY-HOUR 28- 9 1- 6 7- 9 22- 6 13- 6 3- 6 10- 3 8- 6 30- 6 31- 6 30- 9 2- 6 MIN. QFE PRESSURE IN HPA 942.8 943.1 937.1 942.3 940.2 937.6 934.3 937.6 940.8 943.9 945.8 948.0 934.3 DAY-HOUR 6-12 8-12 13-12 25- 3 29-15 17-15 27-15 9-15 10-12 3-15 6-12 12-12 MEAN QNH PRESSURE IN HPA 1019.7 1015.9 1011.6 1013.3 1009.7 1005.7 1002.7 1003.4 1008.5 1013.6 1017.3 1018.2 1011.6 MAX. QNH PRESSURE IN HPA 1026.4 1024.0 1016.9 1022.1 1016.2 1010.7 1007.6 1007.1 1014.4 1020.5 1024.6 1025.3 1026.4 DAY-HOUR 28- 9 1- 6 7- 9 22- 6 13- 6 3- 6 10- 3 8- 6 30- 6 31- 6 30- 9 2- 6 MIN. QNH PRESSURE IN HPA 1005.9 1006.2 999.9 1005.4 1003.2 1000.4 997.0 1000.4 1003.8 1007.1 1009.1 1011.4 997.0 DAY-HOUR 6-12 8-12 13-12 25- 3 29-15 17-15 27-15 9-15 10-12 3-15 6-12 12-12 MEAN QFF PRESSURE IN HPA 1021.0 ****** 1011.9 1012.2 1006.7 1001.9 998.1 ****** ****** ****** 1017.0 1018.9 ****** MAX. QFF PRESSURE IN HPA 1028.3 ****** 1016.9 1022.2 1014.1 1007.4 1004.0 ****** ****** ****** 1022.7 1026.8 ****** DAY-HOUR 28- 6 **-** 23- 6 22- 6 13- 3 3- 6 10- 3 **-** **-** **-** 30-18 2- 6 MIN. QFF PRESSURE IN HPA 1008.2 ****** 1002.6 1002.3 999.5 996.3 991.5 ****** ****** ****** 1008.3 1011.4 ****** DAY-HOUR 6-15 **-** 13-15 25- 3 21-15 17-15 27-15 **-** **-** **-** 6-15 13- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 955.8 952.4 948.2 949.9 946.6 943.3 940.2 940.9 945.4 950.2 953.5 954.5 948.4 MAX. QFE PRESSURE IN HPA 960.2 958.8 952.1 957.7 952.3 946.9 944.4 943.4 949.5 954.9 956.3 961.0 961.0 DAY 28 1 7 22 13 3 10 8 30 31 30 2 MIN. QFE PRESSURE IN HPA 945.5 945.9 941.8 942.3 941.5 939.1 936.3 938.9 941.8 944.6 947.3 948.2 936.3 DAY 6 8 14 25 30 13 27 10 11 4 7 13 MEAN QNH PRESSURE IN HPA 1019.7 1016.0 1011.6 1013.4 1009.9 1006.4 1003.2 1003.9 1008.7 1013.8 1017.2 1018.2 1011.8 MAX. QNH PRESSURE IN HPA 1024.3 1022.8 1015.7 1021.6 1015.9 1010.2 1007.6 1006.6 1013.0 1018.7 1020.2 1025.1 1025.1 DAY 28 1 7 22 13 3 10 8 30 31 30 2 MIN. QNH PRESSURE IN HPA 1008.8 1009.2 1004.9 1005.4 1004.6 1002.0 999.1 1001.8 1004.9 1007.8 1010.7 1011.6 999.1 DAY 6 8 14 25 30 13 27 10 11 4 7 13 MEAN QFF PRESSURE IN HPA 1020.7 1016.3 1011.9 1012.5 1007.1 1002.8 998.8 999.8 1005.5 1011.9 1016.9 1018.8 1010.2 MAX. QFF PRESSURE IN HPA 1026.2 1024.3 1016.8 1022.1 1014.1 1007.3 1004.0 1002.0 1010.4 1018.4 1020.1 1026.2 1026.2 DAY 28 12 22 22 13 3 10 28 30 31 9 2 MIN. QFF PRESSURE IN HPA 1009.0 1008.1 1005.7 1002.3 1001.1 998.7 993.5 996.8 1001.3 1004.9 1008.9 1011.4 993.5 DAY 6 8 14 25 30 13 27 10 11 4 7 13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 956.7 953.3 948.9 950.4 947.0 943.2 940.4 941.2 946.1 950.9 954.3 955.2 949.0 MAX. QFE PRESSURE IN HPA 961.8 959.9 953.1 958.1 952.5 947.3 944.2 943.9 950.8 956.6 957.9 961.2 961.8 DAY 28 1 7 22 13 3 10 8 30 31 30 2 MIN. QFE PRESSURE IN HPA 945.2 946.5 942.6 943.0 942.1 939.1 936.7 939.3 942.9 944.8 948.0 948.2 936.7 DAY 6 8 13 25 30 13 27 10 11 4 7 13 MEAN QNH PRESSURE IN HPA 1020.5 1017.0 1012.4 1013.9 1010.3 1006.3 1003.4 1004.2 1009.4 1014.5 1018.0 1019.0 1012.4 MAX. QNH PRESSURE IN HPA 1026.0 1024.0 1016.8 1022.1 1016.2 1010.7 1007.4 1007.1 1014.4 1020.5 1021.8 1025.3 1026.0 DAY 28 1 7 22 13 3 10 8 30 31 30 2 MIN. QNH PRESSURE IN HPA 1008.5 1009.8 1005.7 1006.1 1005.2 1002.0 999.5 1002.2 1006.0 1008.0 1011.4 1011.6 999.5 DAY 6 8 13 25 30 13 27 10 11 4 7 13 MEAN QFF PRESSURE IN HPA 1022.0 1017.5 1012.7 1013.0 1007.3 1002.3 998.6 ****** 1006.0 1012.4 1017.6 1019.6 ****** MAX. QFF PRESSURE IN HPA 1028.3 1025.6 1016.9 1022.2 1014.0 1007.4 1003.0 ****** 1011.5 1020.0 1021.4 1026.8 ****** DAY 28 12 23 22 13 3 10 ** 30 31 30 2 MIN. QFF PRESSURE IN HPA 1009.2 1008.7 1006.5 1003.8 1001.5 998.0 994.0 ****** 1002.3 1005.2 1009.6 1011.4 ****** DAY 6 8 13 25 30 13 27 ** 11 4 7 13 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 956.4 953.0 948.8 950.5 946.8 942.7 940.1 940.7 945.5 950.3 953.8 954.9 948.6 MAX. QFE PRESSURE IN HPA 962.2 959.0 953.2 957.8 951.8 947.1 943.5 943.4 950.2 956.4 960.5 960.3 962.2 DAY 28 1 7 22 13 3 10 8 30 31 30 1 MIN. QFE PRESSURE IN HPA 943.8 944.3 938.5 944.0 941.3 939.1 936.7 938.9 941.8 944.5 946.7 949.0 936.7 DAY 6 8 13 25 21 13 27 18 10 4 6 6 MEAN QNH PRESSURE IN HPA 1020.2 1016.7 1012.2 1014.0 1010.2 1005.9 1003.1 1003.7 1008.8 1013.8 1017.5 1018.7 1012.1 MAX. QNH PRESSURE IN HPA 1026.4 1023.0 1016.9 1021.7 1015.4 1010.5 1006.7 1006.6 1013.7 1020.3 1024.6 1024.4 1026.4 DAY 28 1 7 22 13 3 10 8 30 31 30 1 MIN. QNH PRESSURE IN HPA 1007.0 1007.5 1001.4 1007.2 1004.3 1002.0 999.5 1001.8 1004.9 1007.7 1010.0 1012.5 999.5 DAY 6 8 13 25 21 13 27 18 10 4 6 6 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 955.1 951.6 947.6 949.6 946.0 942.1 939.3 939.8 944.5 949.3 953.0 953.8 947.6 MAX. QFE PRESSURE IN HPA 960.1 958.4 952.4 956.5 951.2 946.5 942.7 942.2 949.5 954.9 959.2 959.7 960.1 DAY 28 11 7 21 12 3 9 7 30 31 30 1 MIN. QFE PRESSURE IN HPA 942.8 943.1 937.1 943.9 940.5 938.1 935.0 938.3 940.8 944.1 945.8 948.0 935.0 DAY 6 8 13 3 21 17 27 18 10 4 6 12 MEAN QNH PRESSURE IN HPA 1018.8 1015.2 1011.0 1013.1 1009.3 1005.2 1002.2 1002.7 1007.8 1012.8 1016.7 1017.5 1011.0 MAX. QNH PRESSURE IN HPA 1024.2 1022.4 1016.0 1020.4 1014.8 1009.8 1005.8 1005.3 1013.0 1018.7 1023.2 1023.7 1024.2 DAY 28 11 7 21 12 3 9 7 30 31 30 1 MIN. QNH PRESSURE IN HPA 1005.9 1006.2 999.9 1007.1 1003.5 1001.0 997.7 1001.2 1003.8 1007.3 1009.1 1011.4 997.7 DAY 6 8 13 3 21 17 27 18 10 4 6 12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 955.3 951.5 947.7 948.9 945.6 941.7 938.8 939.4 944.4 949.4 953.2 954.0 947.5 MAX. QFE PRESSURE IN HPA 960.1 958.5 952.2 956.2 950.8 946.0 942.5 942.0 949.5 955.2 958.6 959.6 960.1 DAY 17 11 23 21 12 3 9 31 30 31 30 1 MIN. QFE PRESSURE IN HPA 944.6 944.0 939.3 942.7 940.2 937.6 934.3 937.6 940.8 943.9 946.3 948.6 934.3 DAY 6 8 13 18 29 17 27 9 10 3 6 6 MEAN QNH PRESSURE IN HPA 1019.1 1015.1 1011.0 1012.4 1008.8 1004.7 1001.7 1002.4 1007.6 1012.9 1016.9 1017.7 1010.9 MAX. QNH PRESSURE IN HPA 1024.2 1022.5 1015.8 1020.1 1014.4 1009.3 1005.6 1005.1 1013.0 1019.0 1022.6 1023.6 1024.2 DAY 17 11 23 21 12 3 9 31 30 31 30 1 MIN. QNH PRESSURE IN HPA 1007.8 1007.2 1002.2 1005.8 1003.2 1000.4 997.0 1000.4 1003.8 1007.1 1009.6 1012.0 997.0 DAY 6 8 13 18 29 17 27 9 10 3 6 6 MEAN QFF PRESSURE IN HPA 1020.0 1015.3 1011.3 1011.4 1006.1 1001.1 997.4 998.3 1004.4 1011.1 1016.5 1018.3 1009.3 MAX. QFF PRESSURE IN HPA 1025.4 1023.9 1016.1 1020.2 1011.7 1006.2 1001.8 1001.6 1010.3 1018.7 1022.2 1023.8 1025.4 DAY 28 11 23 21 12 3 9 31 30 31 30 1 MIN. QFF PRESSURE IN HPA 1008.2 1005.8 1002.6 1003.8 999.5 996.3 991.5 994.9 1000.1 1004.0 1008.3 1011.8 991.5 DAY 6 8 13 18 21 17 27 9 11 3 6 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 956.1 952.2 948.2 949.6 946.2 942.4 939.6 ****** 945.3 950.1 953.8 954.4 ****** MAX. QFE PRESSURE IN HPA 960.7 958.5 952.5 956.9 951.4 945.9 943.6 ****** 949.1 955.6 959.3 960.3 ****** DAY 17 11 23 21 12 2 9 ** 25 31 30 1 MIN. QFE PRESSURE IN HPA 947.1 946.3 941.3 943.1 940.9 938.6 934.8 ****** 941.7 944.5 947.1 949.0 ****** DAY 6 8 13 18 29 15 27 ** 11 3 6 23 MEAN QNH PRESSURE IN HPA 1019.9 1015.8 1011.6 1013.1 1009.5 1005.5 1002.6 ****** 1008.6 1013.6 1017.5 1018.2 ****** MAX. QNH PRESSURE IN HPA 1024.8 1022.5 1016.2 1020.8 1015.0 1009.2 1006.8 ****** 1012.6 1019.4 1023.3 1024.4 ****** DAY 17 11 23 21 12 2 9 ** 25 31 30 1 MIN. QNH PRESSURE IN HPA 1010.5 1009.6 1004.3 1006.2 1003.9 1001.5 997.5 ****** 1004.8 1007.7 1010.5 1012.5 ****** DAY 6 8 13 18 29 15 27 ** 11 3 6 23 MEAN QFF PRESSURE IN HPA 1021.4 1016.3 1011.9 1012.1 1006.5 1001.4 997.8 ****** 1005.2 1011.7 1017.0 1018.8 ****** MAX. QFF PRESSURE IN HPA 1026.7 1024.4 1016.7 1021.0 1013.1 1005.8 1002.3 ****** 1009.5 1019.2 1022.7 1024.9 ****** DAY 28 11 21 21 12 5 9 ** 25 31 30 1 MIN. QFF PRESSURE IN HPA 1010.9 1008.3 1005.0 1004.0 1000.2 997.1 992.1 ****** 1000.7 1004.6 1008.6 1012.1 ****** DAY 6 8 13 18 29 15 27 ** 11 3 6 12 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.0 9.9 12.9 18.3 26.0 31.5 ***** ***** ***** 24.9 14.9 10.6 ***** MINIMUN AIR TEMPERATURE (C) 2.9 4.2 6.5 9.7 13.6 18.5 ***** ***** ***** 14.5 6.4 4.3 ***** DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 5 **** **** **** 1 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 **** **** **** 0 1 1 **** DAYS WITH FREEZING MIN.<= 0 6 2 1 0 0 0 **** **** **** 0 3 4 **** TEMPERATURE RECORDS LOWEST(C) -1.8 -0.6 -0.6 1.4 8.0 14.0 ***** ***** ***** 8.0 -5.6 -4.0 ***** DAY 1 26 6 2 11 7 ** ** ** 31 15 29 MAXIMUM AIR TEMPERATURE (C) 12.3 14.4 18.0 24.2 32.7 37.6 ***** ***** ***** 32.0 21.4 15.4 ***** DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 22 30 **** **** **** 24 2 0 **** DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 **** **** **** 0 0 0 **** TEMPERATURE RECORDS HIGHEST(C) 18.0 19.6 25.4 31.4 40.0 44.0 ***** ***** ***** 37.0 30.0 25.2 ***** DAY 10 22 30 17 31 13 ** ** ** 2 7 8 DIF. BETWEEN (MAX.-MIN.) (C) 9.4 10.2 11.5 14.5 19.1 19.1 ***** ***** ***** 17.5 15.0 11.1 ***** MEAN DAILY TEMP. (MDT) (C) 7.6 9.3 12.2 17.0 23.2 28.1 ***** ***** ***** 23.2 13.9 9.8 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.2 87.0 212.6 ****** ****** ****** 84.1 0.9 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 322.5 252.0 179.5 52.1 0.5 0.0 ****** ****** ****** 2.7 140.0 253.6 ****** DEWPOINT (MEAN C) 2.6 3.0 5.2 8.7 4.6 5.5 ***** ***** ***** 6.8 2.1 1.9 ***** MIXING RATIO (G/KG) 4.96 5.12 5.95 7.85 5.80 6.52 ****** ****** ****** 6.71 5.09 4.78 ****** VAPOUR PRESSURE (HPA) 7.53 7.76 8.98 11.79 8.74 9.74 ****** ****** ****** 10.19 7.77 7.30 ****** SATURATION DEF. (HPA) 3.48 4.80 6.44 10.20 27.38 39.00 ****** ****** ****** 23.15 10.68 6.44 ****** RELATIVE HUMIDITY (MEAN %) 72 66 63 58 30 23 *** *** *** 36 48 60 *** RELATIVE HUMIDITY (MAX. %) 90 87 83 83 58 43 *** *** *** 59 75 79 *** RELATIVE HUMIDITY (MIN. %) 50 46 45 36 16 15 *** *** *** 23 28 42 *** RELATIVE HUMIDITY (MEAN% 03UTC) 86 83 81 80 58 43 *** *** *** 56 71 74 *** RELATIVE HUMIDITY (MEAN% 09UTC) 56 52 52 42 18 17 *** *** *** 27 34 50 *** RELATIVE HUMIDITY (MEAN% 15UTC) 71 62 54 53 20 16 *** *** *** 31 44 59 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 118.4 121.5 59.6 52.8 0.0 0.0 ****** ****** ****** 2.4 18.5 89.4 ****** DAYS WITH PRECIPITATION >=10 6 5 2 2 0 0 **** **** **** 0 0 3 **** DAYS WITH PRECIPITATION >= 5 9 9 6 3 0 0 **** **** **** 0 2 7 **** DAYS WITH PRECIPITATION >= 1 16 12 8 9 0 0 **** **** **** 2 4 8 **** DAYS WITH PRECIPITATION 17 13 14 9 0 0 **** **** **** 4 6 10 **** GREATEST DAILY PRECIPITATION 15.0 20.0 18.0 22.0 0.0 0.0 ****** ****** ****** 1.1 7.0 24.0 ****** DAY 6 17 3 25 ** ** ** ** ** 30 13 17 DAY WITH THUNDER STORM 1 5 2 9 0 0 **** **** **** 0 0 0 **** DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 **** **** **** 0 0 2 **** DAYS WITH DUST 1 0 1 0 0 2 **** **** **** 2 4 4 **** WIND DIRECTION (PREVAILING) 270 135 225 135 225 270 *** *** *** 315 225 180 *** PREVAILING WIND SPEED(KNOTS) 4.6 8.6 7.2 7.2 11.6 11.6 **** **** **** 9.8 9.8 14.9 **** PREVAILING WIND PERCENT 10.2 17.2 11.3 11.7 12.4 21.1 ***** ***** ***** 11.8 8.7 8.4 ***** CALMS PERCENT OF WIND 62.9 46.6 50.5 51.7 50.0 47.8 ***** ***** ***** 32.9 60.7 73.5 ***** NO. OF WIND OBSERVATION 186 174 186 180 186 180 **** **** **** 152 150 155 1549 VECTOR WIND DIRECTION (MEAN) 178 134 201 188 220 250 *** *** *** 214 223 194 *** VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.8 2.0 0.5 3.0 4.0 **** **** **** 0.5 1.4 1.6 **** WIND STEADINESES (MEAN %) 40.0 46.2 57.1 12.5 50.8 67.8 ***** ***** ***** 7.5 38.9 66.7 ***** WIND SPEED (MEAN KNOTS) 2.0 3.9 3.5 4.0 5.9 5.9 **** **** **** 6.7 3.6 2.4 **** FASTEST WIND DIRECTION 290 140 170 160 160 350 *** *** *** 360 180 180 *** FASTEST WIND SPEED (KNOTS) 14 27 23 29 29 23 *** *** *** 23 19 23 *** DAY 2 1 4 17 9 17 ** ** ** 7 19 27 DAYS WITH SKY CLEAR (0-2)/8 9 9 12 6 23 27 **** **** **** 18 13 9 **** DAYS WITH P.CLOUDY (3-6)/8 10 6 12 12 8 3 **** **** **** 8 9 10 **** DAYS WITH CLOUDY (7-8)/8 12 14 7 12 0 0 **** **** **** 5 8 12 **** DAYS WITH VISIBILITY =< 2 KM 1 0 1 0 0 0 **** **** **** 0 0 3 **** DURATION OF SUNSHINE HOURS 133.8 145.6 203.5 176.8 339.2 353.5 ****** ****** ****** 244.9 180.5 145.4 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 953.7 950.7 949.0 948.3 946.6 941.3 ****** ****** ****** 955.3 959.0 958.2 ****** MAX. QFE PRESSURE IN HPA 960.8 959.1 957.1 955.8 952.1 945.7 ****** ****** ****** 961.5 967.1 968.7 ****** DAY-HOUR 2- 6 20- 6 16- 9 8- 9 4- 6 3- 9 **-** **-** **-** 23- 3 15- 6 29- 6 MIN. QFE PRESSURE IN HPA 947.6 938.6 936.3 938.8 940.0 933.8 ****** ****** ****** 948.5 949.3 942.3 ****** DAY-HOUR 26- 3 2- 3 8-12 25-12 31-15 30-15 **-** **-** **-** 1-15 19-12 25-15 MEAN QNH PRESSURE IN HPA 1017.4 1014.3 1012.5 1011.7 1010.0 1004.4 ****** ****** ****** 1019.1 1023.0 1022.2 ****** MAX. QNH PRESSURE IN HPA 1024.9 1023.1 1021.0 1019.6 1015.7 1009.0 ****** ****** ****** 1025.6 1031.5 1033.2 ****** DAY-HOUR 2- 6 20- 6 16- 9 8- 9 4- 6 3- 9 **-** **-** **-** 23- 3 15- 6 29- 6 MIN. QNH PRESSURE IN HPA 1011.0 1001.5 999.1 1001.7 1003.0 996.4 ****** ****** ****** 1011.9 1012.8 1005.4 ****** DAY-HOUR 26- 3 2- 3 8-12 25-12 31-15 30-15 **-** **-** **-** 1-15 19-12 25-15 MEAN QFF PRESSURE IN HPA 1018.8 ****** 1012.6 1010.6 1007.4 1000.5 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1027.2 ****** 1020.9 1019.0 1014.3 1005.3 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 2- 6 **-** 16- 6 8- 6 4- 6 3- 6 **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1011.5 ****** 999.4 1000.2 999.3 992.4 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 26- 3 **-** 8-15 25-15 31-15 30-15 **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 953.8 950.8 949.0 948.5 946.8 941.7 ****** ****** ****** 955.4 959.1 958.0 ****** MAX. QFE PRESSURE IN HPA 959.6 958.2 956.2 953.8 951.7 944.9 ****** ****** ****** 961.5 967.0 968.1 ****** DAY 9 20 16 8 4 4 ** ** ** 23 15 29 MIN. QFE PRESSURE IN HPA 947.6 938.6 940.7 940.6 942.6 935.5 ****** ****** ****** 950.0 953.1 943.3 ****** DAY 26 2 3 25 1 30 ** ** ** 2 19 26 MEAN QNH PRESSURE IN HPA 1017.6 1014.4 1012.5 1011.9 1010.1 1004.8 ****** ****** ****** 1019.3 1023.1 1022.0 ****** MAX. QNH PRESSURE IN HPA 1023.6 1022.2 1020.1 1017.5 1015.3 1008.1 ****** ****** ****** 1025.6 1031.4 1032.6 ****** DAY 9 20 16 8 4 4 ** ** ** 23 15 29 MIN. QNH PRESSURE IN HPA 1011.0 1001.5 1003.7 1003.6 1005.7 998.2 ****** ****** ****** 1013.5 1016.8 1006.5 ****** DAY 26 2 3 25 1 30 ** ** ** 2 19 26 MEAN QFF PRESSURE IN HPA 1018.9 1015.2 1012.5 1011.0 1007.7 1001.2 ****** ****** ****** 1017.2 1023.1 1022.8 ****** MAX. QFF PRESSURE IN HPA 1025.9 1023.6 1020.7 1017.8 1014.2 1004.9 ****** ****** ****** 1024.8 1034.6 1035.9 ****** DAY 2 20 16 1 4 3 ** ** ** 23 15 29 MIN. QFF PRESSURE IN HPA 1011.5 1001.2 1002.7 1002.0 1002.4 994.3 ****** ****** ****** 1009.6 1015.5 1006.2 ****** DAY 26 2 3 25 27 30 ** ** ** 2 19 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 954.4 951.6 949.7 949.2 947.3 942.0 ****** ****** ****** 956.1 960.0 959.1 ****** MAX. QFE PRESSURE IN HPA 960.8 959.1 956.6 955.6 952.1 945.5 ****** ****** ****** 961.5 967.1 968.7 ****** DAY 2 20 16 8 4 3 ** ** ** 23 15 29 MIN. QFE PRESSURE IN HPA 947.6 940.7 941.3 940.6 942.9 935.1 ****** ****** ****** 951.0 952.8 944.5 ****** DAY 26 2 3 25 27 30 ** ** ** 2 19 26 MEAN QNH PRESSURE IN HPA 1018.2 1015.2 1013.2 1012.7 1010.6 1005.0 ****** ****** ****** 1020.0 1024.0 1023.1 ****** MAX. QNH PRESSURE IN HPA 1024.9 1023.1 1020.5 1019.4 1015.7 1008.8 ****** ****** ****** 1025.6 1031.5 1033.2 ****** DAY 2 20 16 8 4 3 ** ** ** 23 15 29 MIN. QNH PRESSURE IN HPA 1011.0 1003.7 1004.3 1003.6 1006.0 997.8 ****** ****** ****** 1014.6 1016.5 1007.7 ****** DAY 26 2 3 25 27 30 ** ** ** 2 19 26 MEAN QFF PRESSURE IN HPA 1019.5 1016.0 1013.2 1011.4 1007.8 1000.9 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1027.2 1024.3 1020.9 1019.0 1014.3 1005.3 ****** ****** ****** ****** ****** ****** ****** DAY 2 20 16 8 4 3 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1011.6 1003.7 1003.2 1001.5 1002.5 993.0 ****** ****** ****** ****** ****** ****** ****** DAY 26 2 3 25 31 30 ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 954.0 951.3 949.3 948.8 947.0 941.7 ****** ****** ****** 955.6 959.2 958.5 ****** MAX. QFE PRESSURE IN HPA 960.6 958.3 957.1 955.8 951.8 945.7 ****** ****** ****** 960.4 966.0 968.2 ****** DAY 2 20 16 8 4 3 ** ** ** 22 15 29 MIN. QFE PRESSURE IN HPA 947.7 940.9 938.8 939.8 942.0 934.7 ****** ****** ****** 950.4 950.5 944.5 ****** DAY 26 1 8 25 27 30 ** ** ** 1 19 26 MEAN QNH PRESSURE IN HPA 1017.8 1014.9 1012.8 1012.3 1010.4 1004.7 ****** ****** ****** 1019.4 1023.2 1022.5 ****** MAX. QNH PRESSURE IN HPA 1024.7 1022.3 1021.0 1019.6 1015.4 1009.0 ****** ****** ****** 1024.5 1030.4 1032.7 ****** DAY 2 20 16 8 4 3 ** ** ** 22 15 29 MIN. QNH PRESSURE IN HPA 1011.1 1003.9 1001.7 1002.8 1005.1 997.4 ****** ****** ****** 1013.9 1014.0 1007.7 ****** DAY 26 1 8 25 27 30 ** ** ** 1 19 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 952.9 949.8 948.3 947.7 946.3 941.0 ****** ****** ****** 954.6 958.3 957.6 ****** MAX. QFE PRESSURE IN HPA 958.8 956.5 955.6 954.3 951.0 945.2 ****** ****** ****** 959.0 965.6 967.2 ****** DAY 2 5 16 8 4 3 ** ** ** 22 14 29 MIN. QFE PRESSURE IN HPA 948.1 939.4 936.3 938.8 940.4 934.1 ****** ****** ****** 949.0 949.3 944.5 ****** DAY 26 1 8 25 31 30 ** ** ** 1 19 26 MEAN QNH PRESSURE IN HPA 1016.6 1013.3 1011.7 1011.1 1009.6 1004.0 ****** ****** ****** 1018.3 1022.2 1021.5 ****** MAX. QNH PRESSURE IN HPA 1022.8 1020.4 1019.4 1018.0 1014.6 1008.5 ****** ****** ****** 1023.0 1030.0 1031.6 ****** DAY 2 5 16 8 4 3 ** ** ** 22 14 29 MIN. QNH PRESSURE IN HPA 1011.5 1002.3 999.1 1001.7 1003.4 996.8 ****** ****** ****** 1012.5 1012.8 1007.7 ****** DAY 26 1 8 25 31 30 ** ** ** 1 19 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 953.2 950.0 948.4 947.3 945.9 940.4 ****** ****** ****** 954.7 958.5 957.8 ****** MAX. QFE PRESSURE IN HPA 959.6 956.8 954.5 953.3 950.8 944.7 ****** ****** ****** 960.0 966.1 966.8 ****** DAY 2 5 15 8 3 3 ** ** ** 14 14 29 MIN. QFE PRESSURE IN HPA 948.2 938.9 937.1 939.0 940.0 933.8 ****** ****** ****** 948.5 950.2 942.3 ****** DAY 25 1 8 25 31 30 ** ** ** 1 19 25 MEAN QNH PRESSURE IN HPA 1016.9 1013.6 1011.9 1010.7 1009.2 1003.4 ****** ****** ****** 1018.5 1022.5 1021.8 ****** MAX. QNH PRESSURE IN HPA 1023.6 1020.7 1018.3 1017.0 1014.4 1007.9 ****** ****** ****** 1024.1 1030.5 1031.2 ****** DAY 2 5 15 8 3 3 ** ** ** 14 14 29 MIN. QNH PRESSURE IN HPA 1011.6 1001.8 999.9 1001.9 1003.0 996.4 ****** ****** ****** 1011.9 1013.7 1005.4 ****** DAY 25 1 8 25 31 30 ** ** ** 1 19 25 MEAN QFF PRESSURE IN HPA 1018.1 1014.3 1011.9 1009.7 1006.8 999.8 ****** ****** ****** 1016.3 1022.5 1022.6 ****** MAX. QFF PRESSURE IN HPA 1025.8 1021.8 1019.0 1016.6 1013.3 1004.8 ****** ****** ****** 1022.1 1033.2 1034.4 ****** DAY 2 6 15 7 4 3 ** ** ** 23 14 29 MIN. QFF PRESSURE IN HPA 1012.2 1001.5 999.4 1000.2 999.3 992.4 ****** ****** ****** 1008.0 1013.0 1005.5 ****** DAY 25 1 8 25 31 30 ** ** ** 1 19 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 953.9 950.9 949.3 948.4 946.7 941.2 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 959.6 957.6 955.6 953.4 952.0 945.7 ****** ****** ****** ****** ****** ****** ****** DAY 2 5 15 8 3 3 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 948.4 939.4 938.4 941.8 941.1 934.6 ****** ****** ****** ****** ****** ****** ****** DAY 28 1 8 29 31 30 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1017.6 1014.5 1012.8 1011.8 1010.0 1004.2 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1023.6 1021.5 1019.4 1017.1 1015.6 1009.0 ****** ****** ****** ****** ****** ****** ****** DAY 2 5 15 8 3 3 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1011.8 1002.3 1001.3 1004.9 1004.1 997.3 ****** ****** ****** ****** ****** ****** ****** DAY 28 1 8 29 31 30 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1018.8 1015.2 1012.7 1010.5 1007.1 1000.1 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1026.0 1023.0 1020.0 1016.9 1014.0 1005.2 ****** ****** ****** ****** ****** ****** ****** DAY 2 5 15 1 3 3 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1012.3 1001.7 1000.5 1002.4 999.8 992.6 ****** ****** ****** ****** ****** ****** ****** DAY 28 1 8 29 31 30 ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.4 8.7 14.7 22.1 27.8 32.3 36.5 34.4 29.9 25.6 16.3 9.9 22.0 MINIMUN AIR TEMPERATURE (C) -1.0 1.4 7.9 11.7 14.7 16.8 20.7 19.6 16.5 14.3 9.3 4.1 11.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 2 18 7 1 2 0 0 30 DAYS WITH MINIMUM TEMP. <=-4 5 0 0 0 0 0 0 0 0 0 0 0 5 DAYS WITH FREEZING MIN.<= 0 20 8 0 0 0 0 0 0 0 0 0 0 28 TEMPERATURE RECORDS LOWEST(C) -5.5 -3.0 0.5 5.2 10.0 9.8 17.8 17.0 12.5 7.4 1.0 0.5 -5.5 DAY 5 16 30 2 9 11 10 27 29 24 22 17 MAXIMUM AIR TEMPERATURE (C) 10.3 13.7 19.3 27.8 33.3 38.6 43.4 41.3 36.4 31.6 21.3 14.4 27.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 27 30 31 31 30 23 0 0 179 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.0 23.0 29.6 31.0 39.6 43.6 46.0 43.2 41.6 37.6 26.6 17.8 46.0 DAY 21 28 7 27 24 28 30 9 1 6 29 21 DIF. BETWEEN (MAX.-MIN.) (C) 11.3 12.3 11.4 16.1 18.6 21.8 22.7 21.7 19.9 17.3 12.0 10.3 16.3 MEAN DAILY TEMP. (MDT) (C) 4.7 7.5 13.6 19.8 24.0 27.7 32.1 30.4 26.4 22.9 15.3 9.3 19.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 16.4 93.2 200.2 331.4 292.8 163.1 77.9 0.3 0.0 1175.4 HEATING DEG. DAYS(BASE 18 0C) 412.9 293.5 139.4 16.3 0.0 0.0 0.0 0.0 0.0 4.1 87.0 271.0 1224.1 DEWPOINT (MEAN C) -1.8 -2.8 6.6 9.2 7.9 7.3 10.6 9.9 7.9 7.3 8.0 4.9 6.3 MIXING RATIO (G/KG) 3.56 3.60 6.55 7.86 7.19 6.85 8.91 8.29 7.21 6.87 7.21 5.79 6.66 VAPOUR PRESSURE (HPA) 5.46 5.51 9.92 11.90 10.88 10.32 13.31 12.42 10.87 10.43 10.98 8.83 10.07 SATURATION DEF. (HPA) 3.90 6.39 7.58 16.08 28.80 41.55 51.82 45.47 34.08 24.36 8.35 3.78 22.68 RELATIVE HUMIDITY (MEAN %) 63 52 63 47 32 24 24 25 28 34 62 73 44 RELATIVE HUMIDITY (MAX. %) 83 71 84 73 58 46 44 46 47 54 82 90 65 RELATIVE HUMIDITY (MIN. %) 46 37 46 30 20 15 15 15 18 23 45 56 31 RELATIVE HUMIDITY (MEAN% 03UTC) 79 63 80 70 56 46 43 46 47 53 81 89 63 RELATIVE HUMIDITY (MEAN% 09UTC) 53 42 52 36 23 17 17 17 20 25 50 62 35 RELATIVE HUMIDITY (MEAN% 15UTC) 62 49 60 42 25 17 17 18 22 32 60 74 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 42.7 50.6 177.4 7.0 3.2 0.0 0.0 0.0 0.0 0.0 76.2 141.4 498.5 DAYS WITH PRECIPITATION >=10 2 2 7 0 0 0 0 0 0 0 3 4 18 DAYS WITH PRECIPITATION >= 5 3 3 9 1 0 0 0 0 0 0 5 4 25 DAYS WITH PRECIPITATION >= 1 7 5 13 2 2 0 0 0 0 0 10 7 46 DAYS WITH PRECIPITATION 10 7 17 4 4 0 0 0 0 0 13 8 63 GREATEST DAILY PRECIPITATION 14.0 20.0 38.0 6.0 2.0 0.0 0.0 0.0 0.0 0.0 24.0 67.0 67.0 DAY 23 19 11 12 10 ** ** ** ** ** 14 1 DAY WITH THUNDER STORM 0 0 5 2 0 0 0 0 0 1 3 2 13 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 4 3 2 2 0 0 0 0 0 0 0 0 11 WIND DIRECTION (PREVAILING) 135 135 135 315 270 270 270 315 270 180 135 270 270 PREVAILING WIND SPEED(KNOTS) 10.4 13.1 13.0 6.9 6.9 9.4 8.5 8.9 7.5 11.4 8.9 4.1 7.4 PREVAILING WIND PERCENT 14.2 20.0 13.5 14.0 16.1 22.0 28.4 20.6 21.3 13.5 10.0 9.6 13.4 CALMS PERCENT OF WIND 71.0 57.1 55.5 52.7 40.6 34.7 40.6 40.0 39.3 40.6 66.0 73.7 51.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 156 1826 VECTOR WIND DIRECTION (MEAN) 131 148 184 265 284 302 271 308 285 212 167 288 257 VECTOR WIND MAGNITUDE(KNOTS) 1.2 2.3 2.0 1.0 1.6 3.6 2.9 3.3 1.9 1.9 1.3 0.4 1.0 WIND STEADINESES (MEAN %) 54.5 51.1 46.5 29.4 33.3 66.7 59.2 73.3 44.2 43.2 54.2 36.4 26.3 WIND SPEED (MEAN KNOTS) 2.2 4.5 4.3 3.4 4.8 5.4 4.9 4.5 4.3 4.4 2.4 1.1 3.8 FASTEST WIND DIRECTION 130 150 150 130 30 350 110 290 130 190 150 130 130 FASTEST WIND SPEED (KNOTS) 21 23 23 29 19 19 23 19 19 19 19 16 29 DAY 22 5 14 21 3 14 22 5 22 29 30 11 DAYS WITH SKY CLEAR (0-2)/8 18 15 8 13 20 30 31 30 30 23 14 15 247 DAYS WITH P.CLOUDY (3-6)/8 6 5 9 14 9 0 0 1 0 7 12 10 73 DAYS WITH CLOUDY (7-8)/8 7 8 14 3 2 0 0 0 0 1 4 6 45 DAYS WITH VISIBILITY =< 2 KM 1 0 0 0 0 0 0 0 0 0 1 2 4 DURATION OF SUNSHINE HOURS 190.1 195.3 178.8 274.8 317.2 370.2 376.7 290.1 295.3 191.8 178.2 176.6 3035.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 958.9 959.8 953.1 954.4 952.1 947.4 943.4 945.0 949.7 955.0 958.6 958.8 953.0 MAX. QFE PRESSURE IN HPA 964.8 965.6 963.0 962.7 957.9 952.5 950.8 948.0 956.0 961.0 964.2 964.1 965.6 DAY-HOUR 18- 6 4- 6 31- 9 1- 6 9- 6 1- 6 9- 6 27- 6 30- 6 22- 6 22- 6 18- 6 MIN. QFE PRESSURE IN HPA 950.7 951.3 941.4 947.8 947.7 942.5 939.4 938.8 944.4 949.8 953.0 951.5 938.8 DAY-HOUR 11-12 13- 3 10-12 23-12 30-15 30-12 30-15 1-15 6-12 11-15 11-12 12-12 MEAN QNH PRESSURE IN HPA 1022.9 1023.8 1016.8 1018.1 1015.7 1010.7 1006.6 1008.2 1013.2 1018.8 1022.5 1022.8 1016.7 MAX. QNH PRESSURE IN HPA 1029.1 1030.0 1027.2 1026.9 1021.8 1016.2 1014.4 1011.4 1019.8 1025.1 1028.5 1028.4 1030.0 DAY-HOUR 18- 6 4- 6 31- 9 1- 6 9- 6 1- 6 9- 6 27- 6 30- 6 22- 6 22- 6 18- 6 MIN. QNH PRESSURE IN HPA 1014.3 1014.9 1004.5 1011.2 1011.1 1005.6 1002.3 1001.7 1007.6 1013.3 1016.7 1015.1 1001.7 DAY-HOUR 11-12 13- 3 10-12 23-12 30-15 30-12 30-15 1-15 6-12 11-15 11-12 12-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 958.8 959.8 953.0 954.6 952.5 948.0 944.0 945.4 950.0 955.3 958.7 958.8 953.2 MAX. QFE PRESSURE IN HPA 963.1 964.8 961.1 962.1 956.8 952.4 950.3 947.9 955.3 960.2 963.5 963.6 964.8 DAY 18 4 31 2 9 13 9 27 30 22 22 18 MIN. QFE PRESSURE IN HPA 951.3 951.3 944.0 949.0 949.7 943.9 941.1 940.8 945.5 951.4 953.9 953.6 940.8 DAY 11 13 10 13 30 30 31 1 6 12 11 12 MEAN QNH PRESSURE IN HPA 1022.8 1023.8 1016.7 1018.3 1016.1 1011.4 1007.2 1008.6 1013.5 1019.1 1022.7 1022.8 1016.9 MAX. QNH PRESSURE IN HPA 1027.3 1029.1 1025.2 1026.3 1020.7 1016.0 1013.8 1011.3 1019.1 1024.3 1027.7 1027.9 1029.1 DAY 18 4 31 2 9 13 9 27 30 22 22 18 MIN. QNH PRESSURE IN HPA 1014.9 1014.9 1007.2 1012.5 1013.2 1007.1 1004.1 1003.8 1008.8 1015.0 1017.6 1017.3 1003.8 DAY 11 13 10 13 30 30 31 1 6 12 11 12 MEAN QFF PRESSURE IN HPA 1024.9 1025.2 1016.5 1016.7 1013.4 1007.9 1002.8 1004.6 1010.4 1016.8 1022.3 1023.7 1015.4 MAX. QFF PRESSURE IN HPA 1030.4 1031.3 1027.3 1026.4 1019.3 1013.1 1009.8 1007.4 1016.8 1023.3 1029.2 1029.8 1031.3 DAY 18 4 31 2 9 13 9 27 30 22 22 18 MIN. QFF PRESSURE IN HPA 1015.2 1016.1 1005.3 1009.7 1009.7 1003.0 999.4 999.9 1005.3 1012.1 1015.9 1017.5 999.4 DAY 11 13 10 13 24 30 2 1 8 7 11 12 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 959.8 960.8 954.1 955.4 953.0 948.2 944.1 945.7 950.5 956.1 959.6 959.6 953.9 MAX. QFE PRESSURE IN HPA 964.8 965.6 962.7 962.7 957.9 952.5 950.8 948.0 956.0 961.0 964.2 964.1 965.6 DAY 18 4 31 1 9 1 9 27 30 22 22 18 MIN. QFE PRESSURE IN HPA 951.8 953.7 946.4 950.4 950.0 943.7 941.1 940.7 945.9 951.8 954.5 953.6 940.7 DAY 11 13 10 23 23 30 31 1 6 12 11 12 MEAN QNH PRESSURE IN HPA 1023.9 1024.9 1017.8 1019.2 1016.6 1011.6 1007.3 1009.0 1014.1 1019.9 1023.6 1023.6 1017.6 MAX. QNH PRESSURE IN HPA 1029.1 1030.0 1026.9 1026.9 1021.8 1016.2 1014.4 1011.4 1019.8 1025.1 1028.5 1028.4 1030.0 DAY 18 4 31 1 9 1 9 27 30 22 22 18 MIN. QNH PRESSURE IN HPA 1015.4 1017.4 1009.7 1013.9 1013.5 1006.9 1004.1 1003.7 1009.2 1015.4 1018.3 1017.3 1003.7 DAY 11 13 10 23 23 30 31 1 6 12 11 12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 959.4 960.3 953.7 955.0 952.6 947.7 943.7 945.4 950.1 955.2 958.8 959.1 953.4 MAX. QFE PRESSURE IN HPA 964.8 964.8 963.0 962.5 957.3 951.9 949.8 947.7 955.4 959.7 963.2 963.4 964.8 DAY 18 8 31 1 8 1 9 26 30 22 22 18 MIN. QFE PRESSURE IN HPA 951.5 953.9 942.2 949.7 949.6 943.2 940.9 940.3 945.5 951.0 954.1 952.4 940.3 DAY 11 22 10 23 30 30 5 1 6 12 11 12 MEAN QNH PRESSURE IN HPA 1023.5 1024.4 1017.5 1018.7 1016.3 1011.0 1006.9 1008.6 1013.6 1019.0 1022.8 1023.1 1017.1 MAX. QNH PRESSURE IN HPA 1029.1 1029.1 1027.2 1026.7 1021.2 1015.5 1013.3 1011.1 1019.2 1023.7 1027.4 1027.6 1029.1 DAY 18 8 31 1 8 1 9 26 30 22 22 18 MIN. QNH PRESSURE IN HPA 1015.1 1017.6 1005.3 1013.2 1013.1 1006.3 1003.9 1003.3 1008.8 1014.6 1017.8 1016.0 1003.3 DAY 11 22 10 23 30 30 5 1 6 12 11 12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 958.1 959.0 952.4 953.6 951.5 946.8 942.8 944.4 949.1 954.1 957.7 958.1 952.3 MAX. QFE PRESSURE IN HPA 964.1 963.5 961.6 961.4 956.6 950.5 948.5 946.9 953.6 958.3 962.0 963.1 964.1 DAY 18 15 31 1 8 1 9 26 30 22 21 18 MIN. QFE PRESSURE IN HPA 950.7 951.4 941.4 947.8 948.2 942.5 939.8 939.4 944.4 950.0 953.0 951.5 939.4 DAY 11 22 10 23 30 30 26 1 6 12 11 12 MEAN QNH PRESSURE IN HPA 1022.0 1023.0 1016.0 1017.4 1015.1 1010.1 1006.0 1007.7 1012.5 1017.9 1021.6 1022.1 1015.9 MAX. QNH PRESSURE IN HPA 1028.4 1027.7 1025.7 1025.5 1020.5 1014.0 1011.9 1010.2 1017.3 1022.3 1026.2 1027.3 1028.4 DAY 18 15 31 1 8 1 9 26 30 22 21 18 MIN. QNH PRESSURE IN HPA 1014.3 1015.0 1004.5 1011.2 1011.6 1005.6 1002.8 1002.3 1007.6 1013.5 1016.7 1015.1 1002.3 DAY 11 22 10 23 30 30 26 1 6 12 11 12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 958.4 959.1 952.4 953.5 950.9 946.3 942.4 944.0 948.7 954.3 958.0 958.5 952.2 MAX. QFE PRESSURE IN HPA 964.3 963.9 960.6 962.2 956.0 950.1 947.5 946.6 953.1 958.6 962.8 964.0 964.3 DAY 18 3 31 1 8 25 9 26 24 22 22 18 MIN. QFE PRESSURE IN HPA 950.7 951.4 942.3 948.4 947.7 942.6 939.4 938.8 944.5 949.8 954.1 951.8 938.8 DAY 11 22 10 23 30 30 30 1 6 11 11 4 MEAN QNH PRESSURE IN HPA 1022.4 1023.1 1016.1 1017.2 1014.5 1009.7 1005.5 1007.2 1012.2 1018.0 1022.0 1022.5 1015.9 MAX. QNH PRESSURE IN HPA 1028.6 1028.2 1024.7 1026.4 1019.8 1013.6 1010.9 1009.9 1016.8 1022.6 1027.0 1028.3 1028.6 DAY 18 3 31 1 8 25 9 26 24 22 22 18 MIN. QNH PRESSURE IN HPA 1014.3 1015.0 1005.4 1011.8 1011.1 1005.7 1002.3 1001.7 1007.7 1013.3 1017.8 1015.4 1001.7 DAY 11 22 10 23 30 30 30 1 6 11 11 4 MEAN QFF PRESSURE IN HPA 1024.4 1024.5 1015.8 1015.6 1011.7 1006.1 1001.0 1003.1 1009.1 1015.8 1021.5 1023.4 1014.3 MAX. QFF PRESSURE IN HPA 1031.3 1030.2 1025.6 1025.5 1018.4 1010.7 1006.7 1005.5 1014.4 1021.6 1028.2 1029.8 1031.3 DAY 18 3 31 1 8 1 9 26 30 22 22 18 MIN. QFF PRESSURE IN HPA 1015.0 1015.7 1004.4 1010.1 1007.6 1001.8 997.8 997.9 1004.2 1010.9 1016.6 1016.0 997.8 DAY 11 22 10 23 30 30 30 1 6 6 11 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.0 9.1 14.4 18.5 27.1 33.0 36.5 33.5 29.9 23.7 18.1 12.3 21.9 MINIMUN AIR TEMPERATURE (C) 2.3 2.8 5.6 9.1 13.6 17.5 22.1 18.6 14.7 12.3 7.9 4.0 10.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 3 21 4 0 0 0 0 29 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 9 3 0 0 0 0 0 0 0 0 0 4 16 TEMPERATURE RECORDS LOWEST(C) -2.6 -1.2 0.8 4.2 6.4 14.0 17.6 16.0 11.0 7.6 3.0 -2.5 -2.6 DAY 26 1 17 5 7 6 3 25 19 18 13 27 MAXIMUM AIR TEMPERATURE (C) 10.8 13.6 19.5 23.8 33.0 39.1 42.6 40.4 37.5 30.2 24.7 17.9 27.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 21 30 31 31 30 20 0 0 167 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.8 19.0 25.4 31.8 40.6 44.0 46.6 43.2 40.2 34.8 29.8 27.0 46.6 DAY 14 18 31 27 24 24 19 3 5 6 3 4 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 10.8 13.9 14.7 19.4 21.6 20.5 21.8 22.8 17.9 16.8 13.9 16.8 MEAN DAILY TEMP. (MDT) (C) 6.5 8.2 12.6 16.4 23.3 28.3 32.3 29.5 26.1 21.2 16.3 10.9 19.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 3.7 98.5 218.2 350.5 263.2 152.7 30.5 1.3 1.4 1120.2 HEATING DEG. DAYS(BASE 18 0C) 355.9 274.9 168.9 67.7 3.9 0.0 0.0 0.0 0.0 4.5 69.8 224.8 1170.3 DEWPOINT (MEAN C) 1.4 2.8 4.5 7.9 7.0 6.4 13.3 18.5 6.2 6.8 5.2 2.0 6.8 MIXING RATIO (G/KG) 4.57 4.98 5.75 7.21 6.83 6.51 11.01 14.89 6.70 6.63 5.94 4.83 7.15 VAPOUR PRESSURE (HPA) 6.98 7.59 8.75 10.91 10.31 9.79 16.35 22.05 10.08 10.07 9.06 7.37 10.78 SATURATION DEF. (HPA) 3.30 4.33 8.39 11.80 28.83 43.87 48.04 33.23 35.47 21.06 13.13 8.07 21.63 RELATIVE HUMIDITY (MEAN %) 70 68 56 54 34 22 28 43 26 38 47 53 45 RELATIVE HUMIDITY (MAX. %) 88 87 82 83 64 46 45 59 47 60 71 75 67 RELATIVE HUMIDITY (MIN. %) 54 51 39 36 19 13 19 36 15 24 30 36 31 RELATIVE HUMIDITY (MEAN% 03UTC) 84 85 81 80 64 46 45 59 47 59 69 70 66 RELATIVE HUMIDITY (MEAN% 09UTC) 60 56 44 44 23 14 23 37 17 28 33 42 35 RELATIVE HUMIDITY (MEAN% 15UTC) 69 66 51 50 28 16 23 39 21 35 44 51 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 112.4 127.0 125.4 43.2 0.0 0.0 0.0 0.0 0.0 9.0 19.6 47.5 484.1 DAYS WITH PRECIPITATION >=10 3 5 3 2 0 0 0 0 0 0 1 1 15 DAYS WITH PRECIPITATION >= 5 8 5 4 3 0 0 0 0 0 1 1 2 24 DAYS WITH PRECIPITATION >= 1 15 8 7 5 0 0 0 0 0 2 1 5 43 DAYS WITH PRECIPITATION 16 8 8 6 0 0 0 0 0 3 2 7 50 GREATEST DAILY PRECIPITATION 27.0 60.0 58.0 20.0 0.0 0.0 0.0 0.0 0.0 6.0 19.0 35.0 60.0 DAY 2 10 11 2 ** ** ** ** ** 26 11 25 DAY WITH THUNDER STORM 2 2 3 1 0 0 0 0 0 2 1 1 12 DAYS WITH SNOW OR SLEET 1 1 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 0 0 1 0 1 2 1 0 0 0 0 0 5 WIND DIRECTION (PREVAILING) 180 135 270 360 270 270 270 270 270 135 270 135 270 PREVAILING WIND SPEED(KNOTS) 7.1 6.6 6.5 5.5 6.0 10.0 10.0 7.7 6.4 5.7 4.3 11.3 7.1 PREVAILING WIND PERCENT 12.3 12.9 14.2 17.3 13.5 26.7 25.8 27.1 20.0 11.6 12.0 9.7 15.6 CALMS PERCENT OF WIND 49.0 48.6 33.5 42.0 41.9 39.3 29.7 44.5 59.3 52.9 64.7 67.1 47.7 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 202 195 188 261 218 277 261 284 296 191 258 159 255 VECTOR WIND MAGNITUDE(KNOTS) 1.0 1.1 1.1 1.2 0.6 3.9 3.0 2.8 2.2 0.5 0.7 1.2 1.2 WIND STEADINESES (MEAN %) 33.3 37.9 22.4 29.3 13.0 68.4 44.1 71.8 84.6 21.7 46.7 52.2 32.4 WIND SPEED (MEAN KNOTS) 3.0 2.9 4.9 4.1 4.6 5.7 6.8 3.9 2.6 2.3 1.5 2.3 3.7 FASTEST WIND DIRECTION 150 210 220 200 120 270 120 290 360 150 180 180 220 FASTEST WIND SPEED (KNOTS) 21 19 29 23 25 21 29 21 17 16 21 19 29 DAY 1 18 6 1 31 16 13 27 14 27 9 4 DAYS WITH SKY CLEAR (0-2)/8 9 11 19 14 23 30 30 31 30 21 21 14 253 DAYS WITH P.CLOUDY (3-6)/8 9 9 9 12 8 0 1 0 0 9 6 15 78 DAYS WITH CLOUDY (7-8)/8 13 8 3 4 0 0 0 0 0 1 3 2 34 DAYS WITH VISIBILITY =< 2 KM 3 4 4 2 0 1 0 0 0 0 0 0 14 DURATION OF SUNSHINE HOURS ****** ****** 262.1 232.3 281.9 ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 959.4 955.2 956.6 953.1 949.9 946.1 942.3 945.0 949.1 955.4 958.4 958.5 952.4 MAX. QFE PRESSURE IN HPA 968.2 962.0 965.9 959.9 955.8 954.0 948.1 949.3 954.2 962.3 965.8 965.2 968.2 DAY-HOUR 26- 6 8- 6 9- 6 4- 9 7- 6 5- 6 15- 6 24- 6 27- 6 30- 6 14- 6 28- 6 MIN. QFE PRESSURE IN HPA 948.7 943.9 948.8 942.5 944.5 939.3 937.4 940.5 944.8 948.4 950.8 949.9 937.4 DAY-HOUR 4-12 10- 3 31-15 1-15 12-15 25-15 5-15 1-15 4-12 13-15 9-12 24-15 MEAN QNH PRESSURE IN HPA 1023.4 1019.0 1020.4 1016.8 1013.4 1009.4 1005.4 1008.2 1012.6 1019.2 1022.3 1022.4 1016.1 MAX. QNH PRESSURE IN HPA 1032.7 1026.2 1030.3 1024.0 1019.6 1017.7 1011.5 1012.8 1017.9 1026.5 1030.2 1029.5 1032.7 DAY-HOUR 26- 6 8- 6 9- 6 4- 9 7- 6 5- 6 15- 6 24- 6 27- 6 30- 6 14- 6 28- 6 MIN. QNH PRESSURE IN HPA 1012.1 1007.1 1012.3 1005.6 1007.7 1002.2 1000.2 1003.5 1008.0 1011.8 1014.4 1013.4 1000.2 DAY-HOUR 4-12 10- 3 31-15 1-15 12-15 25-15 5-15 1-15 4-12 13-15 9-12 24-15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 959.3 955.2 956.6 953.0 950.3 946.6 942.9 945.4 949.4 955.6 958.6 958.5 952.6 MAX. QFE PRESSURE IN HPA 967.4 961.6 964.4 957.5 955.0 953.2 947.5 948.5 953.5 961.4 964.8 964.6 967.4 DAY 26 8 9 4 8 5 15 24 27 30 14 28 MIN. QFE PRESSURE IN HPA 951.1 943.9 950.4 945.0 946.0 940.4 939.1 941.5 945.3 949.8 952.1 952.4 939.1 DAY 1 10 7 2 11 26 5 14 4 14 9 25 MEAN QNH PRESSURE IN HPA 1023.3 1019.0 1020.5 1016.7 1013.8 1009.9 1006.0 1008.7 1012.9 1019.4 1022.6 1022.5 1016.3 MAX. QNH PRESSURE IN HPA 1031.9 1025.7 1028.7 1021.4 1018.8 1016.9 1010.9 1011.9 1017.2 1025.5 1029.1 1028.9 1031.9 DAY 26 8 9 4 8 5 15 24 27 30 14 28 MIN. QNH PRESSURE IN HPA 1014.7 1007.1 1013.9 1008.2 1009.3 1003.4 1002.0 1004.6 1008.6 1013.3 1015.7 1016.0 1002.0 DAY 1 10 7 2 11 26 5 14 4 14 9 25 MEAN QFF PRESSURE IN HPA 1024.9 1020.1 1020.6 1015.9 1011.4 1006.2 1001.4 1004.8 1010.0 1017.7 1022.0 1023.1 1014.8 MAX. QFF PRESSURE IN HPA 1034.6 1026.7 1029.3 1021.7 1017.9 1014.0 1006.2 1008.3 1014.3 1024.8 1030.1 1030.9 1034.6 DAY 26 8 9 4 8 5 15 24 27 30 14 28 MIN. QFF PRESSURE IN HPA 1014.4 1007.8 1012.5 1007.0 1006.3 999.2 996.1 1000.3 1005.6 1010.9 1013.9 1017.2 996.1 DAY 1 15 7 1 31 26 13 14 4 14 9 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 960.2 956.0 957.3 953.7 950.8 946.8 943.2 945.7 950.0 956.5 959.4 959.4 953.2 MAX. QFE PRESSURE IN HPA 968.2 962.0 965.9 959.3 955.8 954.0 948.1 949.3 954.2 962.3 965.8 965.2 968.2 DAY 26 8 9 4 7 5 15 24 27 30 14 28 MIN. QFE PRESSURE IN HPA 951.1 945.4 952.2 945.9 944.8 940.4 939.3 941.3 946.3 951.4 952.1 954.2 939.3 DAY 1 10 7 1 11 26 5 14 5 14 9 25 MEAN QNH PRESSURE IN HPA 1024.3 1019.9 1021.2 1017.4 1014.4 1010.1 1006.3 1009.0 1013.5 1020.3 1023.4 1023.5 1016.9 MAX. QNH PRESSURE IN HPA 1032.7 1026.2 1030.3 1023.3 1019.6 1017.7 1011.5 1012.8 1017.9 1026.5 1030.2 1029.5 1032.7 DAY 26 8 9 4 7 5 15 24 27 30 14 28 MIN. QNH PRESSURE IN HPA 1014.7 1008.7 1015.8 1009.2 1008.0 1003.4 1002.2 1004.3 1009.6 1015.0 1015.7 1017.9 1002.2 DAY 1 10 7 1 11 26 5 14 5 14 9 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 959.9 955.7 957.2 953.7 950.4 946.4 942.6 945.2 949.5 955.7 958.5 958.9 952.8 MAX. QFE PRESSURE IN HPA 967.1 961.4 965.7 959.9 955.7 953.4 947.5 948.3 953.6 961.6 964.6 964.4 967.1 DAY 26 12 9 4 7 4 15 16 27 30 14 28 MIN. QFE PRESSURE IN HPA 950.8 946.1 952.4 946.5 945.4 940.2 938.7 941.7 946.0 951.0 951.8 954.8 938.7 DAY 4 15 31 1 11 25 5 14 5 13 9 24 MEAN QNH PRESSURE IN HPA 1024.0 1019.5 1021.1 1017.4 1014.0 1009.7 1005.8 1008.5 1013.0 1019.6 1022.5 1022.9 1016.5 MAX. QNH PRESSURE IN HPA 1031.5 1025.5 1030.1 1024.0 1019.5 1017.1 1010.9 1011.7 1017.3 1025.7 1028.9 1028.7 1031.5 DAY 26 12 9 4 7 4 15 16 27 30 14 28 MIN. QNH PRESSURE IN HPA 1014.4 1009.4 1016.0 1009.8 1008.7 1003.2 1001.6 1004.8 1009.3 1014.6 1015.4 1018.6 1001.6 DAY 4 15 31 1 11 25 5 14 5 13 9 24 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 958.6 954.5 956.0 952.8 949.4 945.7 941.6 944.4 948.5 954.6 957.5 957.7 951.8 MAX. QFE PRESSURE IN HPA 965.6 960.4 964.2 959.1 954.4 953.2 946.3 947.7 952.5 960.2 963.8 962.6 965.6 DAY 25 8 9 4 7 4 15 16 27 30 14 28 MIN. QFE PRESSURE IN HPA 948.7 945.2 950.1 945.2 945.3 940.0 937.6 940.8 944.8 949.3 950.8 952.1 937.6 DAY 4 15 31 1 12 25 5 1 4 13 9 24 MEAN QNH PRESSURE IN HPA 1022.6 1018.3 1019.8 1016.4 1012.9 1009.0 1004.6 1007.6 1011.9 1018.4 1021.4 1021.6 1015.4 MAX. QNH PRESSURE IN HPA 1030.0 1024.5 1028.5 1023.1 1018.2 1016.9 1009.6 1011.1 1016.2 1024.3 1028.1 1026.8 1030.0 DAY 25 8 9 4 7 4 15 16 27 30 14 28 MIN. QNH PRESSURE IN HPA 1012.1 1008.5 1013.6 1008.5 1008.6 1003.0 1000.4 1003.8 1008.0 1012.8 1014.4 1015.7 1000.4 DAY 4 15 31 1 12 25 5 1 4 13 9 24 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 959.2 954.7 955.9 952.3 948.6 945.2 941.2 944.2 948.3 954.8 957.9 958.0 951.7 MAX. QFE PRESSURE IN HPA 966.4 960.4 964.3 958.4 953.4 952.8 945.7 947.5 952.2 960.2 964.2 963.6 966.4 DAY 11 7 9 4 7 4 15 16 27 30 14 28 MIN. QFE PRESSURE IN HPA 949.6 946.7 948.8 942.5 944.5 939.3 937.4 940.5 944.9 948.4 952.2 949.9 937.4 DAY 4 15 31 1 12 25 5 1 3 13 1 24 MEAN QNH PRESSURE IN HPA 1023.2 1018.5 1019.7 1015.9 1012.1 1008.4 1004.2 1007.4 1011.7 1018.6 1021.9 1021.9 1015.3 MAX. QNH PRESSURE IN HPA 1030.8 1024.5 1028.6 1022.4 1017.1 1016.5 1009.0 1010.9 1015.8 1024.3 1028.5 1027.9 1030.8 DAY 11 7 9 4 7 4 15 16 27 30 14 28 MIN. QNH PRESSURE IN HPA 1013.1 1010.0 1012.3 1005.6 1007.7 1002.2 1000.2 1003.5 1008.1 1011.8 1015.8 1013.4 1000.2 DAY 4 15 31 1 12 25 5 1 3 13 1 24 MEAN QFF PRESSURE IN HPA 1024.7 1019.6 1019.7 1015.0 1009.6 1004.8 999.5 1003.2 1008.8 1016.8 1021.3 1022.5 1013.8 MAX. QFF PRESSURE IN HPA 1033.3 1026.0 1029.1 1022.8 1016.1 1013.4 1003.8 1006.7 1013.1 1023.5 1029.1 1029.6 1033.3 DAY 11 7 9 4 7 4 15 16 27 30 14 28 MIN. QFF PRESSURE IN HPA 1013.3 1010.4 1011.3 1004.0 1004.1 998.2 995.1 999.3 1004.5 1009.3 1014.0 1014.3 995.1 DAY 4 15 31 1 31 25 13 1 3 13 8 24 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.0 9.2 14.2 20.8 25.3 33.9 35.3 30.9 26.8 21.4 15.8 8.9 21.0 MINIMUN AIR TEMPERATURE (C) 3.2 1.9 6.8 10.5 13.5 19.3 20.8 20.2 16.0 13.8 8.3 4.7 11.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 10 13 13 2 0 1 0 39 DAYS WITH MINIMUM TEMP. <=-4 0 4 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH FREEZING MIN.<= 0 3 10 2 0 0 0 0 0 0 0 0 7 22 TEMPERATURE RECORDS LOWEST(C) -2.2 -6.0 0.0 5.0 6.6 13.4 18.4 16.0 12.0 6.0 3.8 -1.0 -6.0 DAY 28 10 10 13 3 1 7 27 26 30 26 21 MAXIMUM AIR TEMPERATURE (C) 13.2 13.8 18.6 25.9 30.7 39.5 41.6 40.6 37.2 29.7 24.3 14.1 27.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 20 30 31 31 30 14 2 0 165 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.2 21.0 25.6 33.8 35.4 44.6 44.4 45.5 41.5 34.5 31.0 20.4 45.5 DAY 6 25 31 25 9 24 21 2 2 9 2 9 DIF. BETWEEN (MAX.-MIN.) (C) 10.0 11.9 11.8 15.4 17.2 20.2 20.8 20.4 21.2 15.9 16.0 9.4 15.8 MEAN DAILY TEMP. (MDT) (C) 8.2 7.8 12.7 18.2 22.1 29.4 31.2 30.4 26.6 21.8 16.3 9.4 19.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 10.4 48.4 251.3 315.8 292.1 168.4 42.5 7.6 0.0 1136.7 HEATING DEG. DAYS(BASE 18 0C) 303.3 260.7 165.1 38.3 1.5 0.0 0.0 0.0 0.0 1.6 73.1 266.1 1109.7 DEWPOINT (MEAN C) 3.8 0.7 7.2 9.6 7.6 15.6 12.9 9.1 5.1 8.7 3.4 3.7 7.3 MIXING RATIO (G/KG) 5.36 4.52 6.92 8.13 7.07 12.57 10.11 7.88 5.90 7.59 5.26 5.36 7.22 VAPOUR PRESSURE (HPA) 8.17 6.91 10.49 12.29 10.68 18.67 15.06 11.81 8.93 11.52 8.03 8.17 10.90 SATURATION DEF. (HPA) 3.71 5.30 6.46 13.89 23.14 37.58 45.45 36.24 29.24 15.29 11.20 3.64 19.26 RELATIVE HUMIDITY (MEAN %) 72 60 66 53 36 35 28 29 28 49 49 72 48 RELATIVE HUMIDITY (MAX. %) 90 83 89 80 61 52 49 48 47 71 72 89 69 RELATIVE HUMIDITY (MIN. %) 54 43 49 35 23 28 20 14 13 26 24 50 32 RELATIVE HUMIDITY (MEAN% 03UTC) 87 80 86 77 61 51 49 47 45 67 67 84 67 RELATIVE HUMIDITY (MEAN% 09UTC) 60 51 55 41 27 31 21 16 15 30 28 58 36 RELATIVE HUMIDITY (MEAN% 15UTC) 72 55 60 49 28 31 22 17 18 38 41 70 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 66.6 53.0 182.4 33.2 0.4 0.0 0.0 0.0 0.0 9.3 15.5 179.5 539.9 DAYS WITH PRECIPITATION >=10 3 1 8 2 0 0 0 0 0 0 1 5 20 DAYS WITH PRECIPITATION >= 5 4 4 9 2 0 0 0 0 0 0 1 6 26 DAYS WITH PRECIPITATION >= 1 7 8 12 3 0 0 0 0 0 4 2 8 44 DAYS WITH PRECIPITATION 10 8 12 4 1 0 0 0 0 9 2 14 60 GREATEST DAILY PRECIPITATION 22.4 21.0 33.0 19.0 0.4 0.0 0.0 0.0 0.0 4.0 12.5 102.0 102.0 DAY 14 20 6 4 16 ** ** ** ** 15 4 12 DAY WITH THUNDER STORM 0 1 2 2 0 0 0 0 1 7 2 6 21 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 1 8 5 5 16 5 1 5 1 47 WIND DIRECTION (PREVAILING) 270 270 270 315 270 270 270 270 270 270 135 180 270 PREVAILING WIND SPEED(KNOTS) 4.9 4.7 5.1 5.3 6.3 7.5 6.8 7.3 7.2 8.9 10.9 10.9 6.7 PREVAILING WIND PERCENT 12.9 10.8 12.3 10.7 29.7 23.3 27.7 20.2 11.3 8.5 10.8 16.1 13.9 CALMS PERCENT OF WIND 69.7 63.1 52.9 54.7 44.5 46.0 51.0 65.7 58.8 66.5 61.7 60.5 58.8 NO. OF WIND OBSERVATION 155 130 155 150 155 150 155 248 240 248 240 248 2274 VECTOR WIND DIRECTION (MEAN) 271 217 183 211 278 262 291 283 289 231 185 180 246 VECTOR WIND MAGNITUDE(KNOTS) 0.7 0.4 1.2 1.3 2.4 2.0 2.9 1.8 0.8 1.1 1.9 2.2 1.1 WIND STEADINESES (MEAN %) 43.8 16.7 33.3 36.1 66.7 48.8 85.3 75.0 25.0 40.7 45.2 66.7 34.4 WIND SPEED (MEAN KNOTS) 1.6 2.4 3.6 3.6 3.6 4.1 3.4 2.4 3.2 2.7 4.2 3.3 3.2 FASTEST WIND DIRECTION 170 150 160 140 260 240 300 310 120 240 150 180 160 FASTEST WIND SPEED (KNOTS) 19 25 33 29 19 19 16 23 23 23 29 29 33 DAY 31 17 5 3 23 26 4 10 26 3 30 9 DAYS WITH SKY CLEAR (0-2)/8 9 11 11 12 18 30 31 31 30 15 20 14 232 DAYS WITH P.CLOUDY (3-6)/8 14 10 11 14 10 0 0 0 0 13 6 5 83 DAYS WITH CLOUDY (7-8)/8 8 6 9 4 3 0 0 0 0 3 4 12 49 DAYS WITH VISIBILITY =< 2 KM 4 3 6 3 8 1 0 3 0 0 0 6 34 DURATION OF SUNSHINE HOURS 61.6 151.8 188.1 229.2 269.5 347.7 358.2 ****** 299.3 229.6 211.8 141.3 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 957.9 958.2 953.8 953.6 950.9 945.8 942.4 944.1 950.8 956.0 957.9 956.9 952.3 MAX. QFE PRESSURE IN HPA 966.3 966.3 960.4 960.2 954.6 953.4 947.1 948.2 955.2 961.2 963.0 964.1 966.3 DAY-HOUR 28- 6 15- 6 8- 6 14- 9 25- 6 1- 6 3- 6 31- 6 23- 6 20- 9 14- 6 6- 6 MIN. QFE PRESSURE IN HPA 950.9 951.2 939.0 946.4 943.4 938.9 937.7 939.7 945.5 951.6 949.9 944.3 937.7 DAY-HOUR 26- 3 20-12 6- 3 4- 3 16-15 19-15 14-12 11-15 3-15 10-12 4- 0 31-12 MEAN QNH PRESSURE IN HPA 1021.8 1022.2 1017.5 1017.3 1014.4 1009.0 1005.5 1007.3 1014.3 1019.8 1021.8 1020.8 1016.0 MAX. QNH PRESSURE IN HPA 1030.7 1030.7 1024.5 1024.3 1018.4 1017.1 1010.5 1011.6 1019.0 1025.3 1027.2 1028.4 1030.7 DAY-HOUR 28- 6 15- 6 8- 6 14- 9 25- 6 1- 6 3- 6 31- 6 23- 6 20- 9 14- 6 6- 6 MIN. QNH PRESSURE IN HPA 1014.5 1014.8 1001.9 1009.7 1006.6 1001.8 1000.6 1002.7 1008.8 1015.2 1013.4 1007.5 1000.6 DAY-HOUR 26- 3 20-12 6- 3 4- 3 16-15 19-15 14-12 11-15 3-15 10-12 4- 0 31-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.0 1011.0 1017.6 1021.0 1021.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.4 1016.3 1023.4 1027.5 1030.2 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 31- 6 23- 6 21- 6 27- 6 6- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.5 1005.0 1011.7 1009.9 1008.5 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 11-15 3-12 10-12 4- 0 31-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 944.0 950.6 955.7 957.9 957.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 947.6 953.5 960.0 962.1 963.0 ****** DAY ** ** ** ** ** ** ** 27 15 21 27 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 940.4 946.6 951.7 949.9 949.8 ****** DAY ** ** ** ** ** ** ** 2 4 15 4 9 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.2 1014.1 1019.5 1021.8 1021.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.0 1017.2 1024.1 1026.3 1027.2 ****** DAY ** ** ** ** ** ** ** 27 15 21 27 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.4 1009.9 1015.3 1013.4 1013.3 ****** DAY ** ** ** ** ** ** ** 2 4 15 4 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1002.8 1010.6 1017.1 1020.6 1021.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.3 1014.0 1022.3 1026.1 1028.7 ****** DAY ** ** ** ** ** ** ** 27 25 21 27 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.8 1005.9 1012.3 1009.9 1011.4 ****** DAY ** ** ** ** ** ** ** 1 3 15 4 9 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 957.8 958.2 953.7 953.3 951.0 946.3 942.9 944.2 951.1 956.1 958.1 956.8 952.5 MAX. QFE PRESSURE IN HPA 965.5 964.6 959.2 959.5 954.0 952.7 946.8 947.4 954.2 959.8 962.1 963.0 965.5 DAY 28 16 8 19 25 1 3 27 29 21 27 17 MIN. QFE PRESSURE IN HPA 950.9 952.4 939.0 946.4 947.0 940.8 938.9 940.4 946.8 951.8 949.9 949.7 938.9 DAY 26 8 6 4 27 20 14 2 3 15 4 9 MEAN QNH PRESSURE IN HPA 1021.7 1022.2 1017.4 1017.0 1014.6 1009.7 1006.0 1007.4 1014.6 1019.9 1022.1 1020.7 1016.1 MAX. QNH PRESSURE IN HPA 1029.9 1028.9 1023.2 1023.5 1017.7 1016.4 1010.1 1010.8 1017.9 1023.8 1026.3 1027.2 1029.9 DAY 28 16 8 19 25 1 3 27 29 21 27 17 MIN. QNH PRESSURE IN HPA 1014.5 1016.0 1001.9 1009.7 1010.4 1003.8 1001.8 1003.4 1010.1 1015.4 1013.4 1013.2 1001.8 DAY 26 8 6 4 27 20 14 2 3 15 4 9 MEAN QFF PRESSURE IN HPA 1022.9 1023.4 1017.3 1015.7 1012.3 1005.6 1001.7 1003.4 1011.6 1018.0 1021.5 1021.6 1014.6 MAX. QFF PRESSURE IN HPA 1032.4 1030.6 1024.8 1023.2 1015.6 1013.7 1005.8 1007.4 1015.4 1022.5 1026.8 1029.0 1032.4 DAY 28 15 8 14 25 1 3 27 25 21 27 17 MIN. QFF PRESSURE IN HPA 1015.0 1016.3 1001.7 1007.6 1007.7 998.1 997.4 999.1 1006.3 1012.9 1010.2 1011.7 997.4 DAY 31 20 6 9 27 20 14 2 3 15 4 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 958.7 959.2 954.6 954.5 951.6 946.6 943.2 944.6 951.8 957.1 959.0 957.6 953.2 MAX. QFE PRESSURE IN HPA 966.3 966.3 960.4 960.2 954.6 953.4 947.1 948.2 955.2 961.0 963.0 964.1 966.3 DAY 28 15 8 19 25 1 3 31 23 20 14 6 MIN. QFE PRESSURE IN HPA 952.1 953.4 941.1 947.6 947.3 941.8 939.0 940.6 947.0 952.5 951.6 949.7 939.0 DAY 31 20 6 4 16 20 14 2 3 15 4 31 MEAN QNH PRESSURE IN HPA 1022.7 1023.2 1018.4 1018.2 1015.2 1010.0 1006.4 1007.9 1015.4 1021.0 1023.0 1021.5 1016.9 MAX. QNH PRESSURE IN HPA 1030.7 1030.7 1024.5 1024.3 1018.4 1017.1 1010.5 1011.6 1019.0 1025.1 1027.2 1028.4 1030.7 DAY 28 15 8 19 25 1 3 31 23 20 14 6 MIN. QNH PRESSURE IN HPA 1015.7 1017.1 1004.1 1011.0 1010.7 1004.9 1001.9 1003.6 1010.4 1016.2 1015.2 1013.2 1001.9 DAY 31 20 6 4 16 20 14 2 3 15 4 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.6 1012.1 1019.0 1022.5 1022.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.4 1016.3 1023.4 1027.5 1030.2 ****** DAY ** ** ** ** ** ** ** 31 23 21 27 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.7 1006.3 1013.9 1012.7 1011.7 ****** DAY ** ** ** ** ** ** ** 2 3 15 4 9 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 958.1 958.6 954.3 954.3 951.4 946.2 942.8 944.2 951.2 956.4 957.9 957.0 952.7 MAX. QFE PRESSURE IN HPA 965.6 965.9 959.8 960.2 954.4 952.8 946.4 948.0 954.3 961.2 961.6 963.2 965.9 DAY 28 15 8 14 24 1 3 31 29 20 14 29 MIN. QFE PRESSURE IN HPA 953.0 951.9 941.3 948.2 946.7 941.3 938.7 940.7 946.9 953.1 950.0 947.1 938.7 DAY 25 20 6 4 16 19 14 2 3 10 4 31 MEAN QNH PRESSURE IN HPA 1022.1 1022.6 1018.0 1018.1 1014.9 1009.5 1005.9 1007.4 1014.8 1020.3 1021.9 1020.9 1016.4 MAX. QNH PRESSURE IN HPA 1030.0 1030.3 1023.8 1024.3 1018.2 1016.5 1009.7 1011.4 1018.0 1025.3 1025.7 1027.4 1030.3 DAY 28 15 8 14 24 1 3 31 29 20 14 29 MIN. QNH PRESSURE IN HPA 1016.7 1015.5 1004.3 1011.6 1010.0 1004.3 1001.6 1003.7 1010.2 1016.8 1013.5 1010.5 1001.6 DAY 25 20 6 4 16 19 14 2 3 10 4 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.1 1011.4 1017.8 1020.7 1021.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.7 1014.9 1023.3 1025.2 1028.6 ****** DAY ** ** ** ** ** ** ** 31 29 20 27 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.8 1006.4 1013.1 1011.5 1011.4 ****** DAY ** ** ** ** ** ** ** 5 3 10 4 31 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 957.1 957.4 953.2 953.3 950.5 945.2 941.8 943.4 949.9 955.2 956.8 955.9 951.6 MAX. QFE PRESSURE IN HPA 964.4 964.9 958.2 959.5 953.3 951.5 944.8 947.4 953.1 959.3 960.4 962.3 964.9 DAY 28 15 8 14 8 1 2 31 22 20 14 29 MIN. QFE PRESSURE IN HPA 951.4 951.2 941.6 948.4 946.4 939.9 937.7 940.7 945.6 951.6 950.3 944.3 937.7 DAY 25 20 6 4 16 19 14 1 3 10 3 31 MEAN QNH PRESSURE IN HPA 1021.0 1021.3 1016.9 1017.0 1014.0 1008.5 1004.9 1006.6 1013.4 1019.0 1020.7 1019.7 1015.3 MAX. QNH PRESSURE IN HPA 1028.7 1029.2 1022.2 1023.5 1017.0 1015.1 1008.0 1010.8 1016.8 1023.3 1024.5 1026.5 1029.2 DAY 28 15 8 14 8 1 2 31 22 20 14 29 MIN. QNH PRESSURE IN HPA 1015.0 1014.8 1004.7 1011.8 1009.7 1002.9 1000.6 1003.7 1008.9 1015.2 1013.8 1007.5 1000.6 DAY 25 20 6 4 16 19 14 1 3 10 3 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1002.2 1009.9 1016.6 1019.5 1020.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1006.9 1013.8 1021.2 1024.1 1027.5 ****** DAY ** ** ** ** ** ** ** 31 22 20 26 16 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.8 1005.0 1011.7 1010.3 1008.5 ****** DAY ** ** ** ** ** ** ** 1 3 10 3 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 957.6 957.8 953.2 952.7 949.9 944.5 941.5 943.2 949.8 955.3 957.3 956.5 951.6 MAX. QFE PRESSURE IN HPA 964.4 965.3 957.6 958.8 953.4 949.9 944.7 947.3 952.6 959.3 961.3 963.0 965.3 DAY 28 15 8 13 8 1 2 31 14 21 26 29 MIN. QFE PRESSURE IN HPA 951.3 951.4 942.0 946.8 943.4 938.9 937.8 939.7 945.5 952.0 950.1 946.0 937.8 DAY 25 7 6 3 16 19 13 11 3 9 30 31 MEAN QNH PRESSURE IN HPA 1021.5 1021.7 1016.9 1016.4 1013.4 1007.7 1004.5 1006.3 1013.3 1019.1 1021.2 1020.3 1015.2 MAX. QNH PRESSURE IN HPA 1028.7 1029.6 1021.5 1022.8 1017.1 1013.4 1007.9 1010.7 1016.3 1023.3 1025.4 1027.2 1029.6 DAY 28 15 8 13 8 1 2 31 14 21 26 29 MIN. QNH PRESSURE IN HPA 1014.9 1015.0 1005.1 1010.1 1006.6 1001.8 1000.7 1002.7 1008.8 1015.6 1013.6 1009.3 1000.7 DAY 25 7 6 3 16 19 13 11 3 9 30 31 MEAN QFF PRESSURE IN HPA 1022.6 1023.1 1016.8 1014.9 1011.1 1003.5 1000.1 1002.4 1010.3 1017.2 1020.6 1021.2 1013.7 MAX. QFF PRESSURE IN HPA 1031.0 1031.3 1022.8 1022.8 1014.9 1010.5 1003.5 1007.3 1013.6 1021.9 1025.9 1028.6 1031.3 DAY 28 15 11 13 24 1 2 31 30 21 26 29 MIN. QFF PRESSURE IN HPA 1016.9 1015.7 1005.1 1008.1 1003.5 996.2 996.2 998.5 1005.3 1012.8 1011.3 1010.3 996.2 DAY 25 20 6 3 16 19 13 11 3 10 3 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 944.5 950.9 956.2 958.0 957.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 948.2 953.7 960.1 962.5 963.8 ****** DAY ** ** ** ** ** ** ** 31 14 20 26 29 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 940.9 947.0 952.7 951.3 948.4 ****** DAY ** ** ** ** ** ** ** 1 3 10 3 31 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.7 1014.5 1020.0 1022.0 1021.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.6 1017.4 1024.2 1026.7 1028.1 ****** DAY ** ** ** ** ** ** ** 31 14 20 26 29 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.9 1010.4 1016.4 1014.9 1011.8 ****** DAY ** ** ** ** ** ** ** 1 3 10 3 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.4 1011.2 1018.0 1021.5 1022.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.3 1014.2 1022.4 1027.3 1029.7 ****** DAY ** ** ** ** ** ** ** 31 14 20 26 16 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.0 1006.9 1013.6 1011.9 1012.7 ****** DAY ** ** ** ** ** ** ** 1 2 10 3 31 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 944.7 950.9 956.1 958.1 957.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 947.9 953.6 960.1 962.5 963.6 ****** DAY ** ** ** ** ** ** ** 31 14 20 26 29 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 941.3 946.7 952.4 951.1 950.0 ****** DAY ** ** ** ** ** ** ** 1 3 14 3 31 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.9 1014.5 1020.0 1022.0 1021.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.3 1017.3 1024.2 1026.7 1027.9 ****** DAY ** ** ** ** ** ** ** 31 14 20 26 29 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.3 1010.0 1016.0 1014.7 1013.5 ****** DAY ** ** ** ** ** ** ** 1 3 14 3 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.4 1011.0 1017.5 1020.8 1021.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.5 1014.0 1022.6 1026.3 1029.2 ****** DAY ** ** ** ** ** ** ** 31 22 20 26 16 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.5 1006.4 1012.8 1011.6 1012.6 ****** DAY ** ** ** ** ** ** ** 1 2 9 3 8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.5 6.4 9.0 15.8 21.3 27.6 30.7 31.5 26.9 20.5 13.8 7.5 18.0 MINIMUN AIR TEMPERATURE (C) 0.6 2.1 3.6 9.1 13.2 17.7 19.3 21.1 16.7 10.8 7.7 3.3 10.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 2 7 18 5 0 0 0 32 DAYS WITH MINIMUM TEMP. <=-4 4 1 0 0 0 0 0 0 0 0 0 1 6 DAYS WITH FREEZING MIN.<= 0 18 9 7 0 0 0 0 0 0 0 4 7 45 TEMPERATURE RECORDS LOWEST(C) -10.0 -8.6 -2.0 4.2 8.0 14.0 15.5 17.4 7.2 6.0 -2.0 -4.0 -10.0 DAY 25 29 2 7 4 5 1 25 29 28 27 28 MAXIMUM AIR TEMPERATURE (C) 9.1 10.8 14.7 22.5 28.9 36.8 40.7 40.8 37.0 31.0 21.1 12.4 25.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 10 30 31 31 29 24 0 0 155 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.4 16.2 22.4 28.6 38.6 40.2 43.6 44.2 41.4 34.2 29.5 19.6 44.2 DAY 21 24 29 12 30 29 8 16 2 4 4 15 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 8.7 11.1 13.4 15.7 19.1 21.4 19.7 20.3 20.2 13.4 9.1 15.1 MEAN DAILY TEMP. (MDT) (C) 4.8 6.5 9.2 15.8 21.0 27.3 30.0 31.0 26.8 20.9 14.4 7.8 18.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.3 41.2 187.5 279.0 308.6 179.3 20.0 0.0 0.0 1017.0 HEATING DEG. DAYS(BASE 18 0C) 408.0 333.6 273.7 73.9 3.8 0.0 0.0 0.0 0.0 3.7 110.7 314.6 1522.1 DEWPOINT (MEAN C) -0.6 0.5 2.1 6.3 9.6 7.7 5.6 7.4 5.2 3.0 5.0 3.6 4.6 MIXING RATIO (G/KG) 4.00 4.25 4.92 6.42 8.08 7.14 6.24 6.99 5.97 5.04 6.08 5.37 5.87 VAPOUR PRESSURE (HPA) 6.12 6.48 7.50 9.73 12.19 10.75 9.38 10.50 9.04 7.67 9.27 8.19 8.90 SATURATION DEF. (HPA) 2.57 3.47 4.59 9.17 14.83 28.96 38.50 38.58 29.80 18.53 7.66 2.61 16.61 RELATIVE HUMIDITY (MEAN %) 73 69 66 58 52 33 24 25 28 35 61 78 50 RELATIVE HUMIDITY (MAX. %) 92 87 88 81 77 56 43 43 45 53 82 94 70 RELATIVE HUMIDITY (MIN. %) 49 47 43 32 28 16 11 12 13 16 34 54 30 RELATIVE HUMIDITY (MEAN% 03UTC) 82 77 82 75 70 54 42 39 41 51 76 88 65 RELATIVE HUMIDITY (MEAN% 09UTC) 57 55 49 38 32 19 12 13 14 18 40 61 34 RELATIVE HUMIDITY (MEAN% 15UTC) 69 64 55 45 40 21 13 15 20 27 54 75 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 98.9 100.7 117.4 25.7 46.7 1.7 0.0 0.0 0.0 0.0 50.9 93.0 535.0 DAYS WITH PRECIPITATION >=10 3 5 4 1 2 0 0 0 0 0 3 3 21 DAYS WITH PRECIPITATION >= 5 6 9 7 3 2 0 0 0 0 0 3 7 37 DAYS WITH PRECIPITATION >= 1 10 14 12 3 3 1 0 0 0 0 7 8 58 DAYS WITH PRECIPITATION 14 17 14 3 7 2 0 0 0 0 10 12 79 GREATEST DAILY PRECIPITATION 27.1 13.0 34.0 12.8 34.0 1.1 0.0 0.0 0.0 0.0 17.0 27.0 34.0 DAY 30 21 15 18 6 2 ** ** ** ** 7 3 DAY WITH THUNDER STORM 2 2 4 4 6 1 0 0 0 0 4 4 27 DAYS WITH SNOW OR SLEET 5 1 0 0 0 0 0 0 0 0 0 2 8 DAYS WITH DUST 0 2 1 1 2 3 0 2 0 1 1 0 13 WIND DIRECTION (PREVAILING) 135 180 180 360 270 270 270 270 135 270 180 270 270 PREVAILING WIND SPEED(KNOTS) 11.6 11.1 10.2 6.4 6.9 8.5 5.5 5.6 11.4 5.5 17.3 4.5 6.1 PREVAILING WIND PERCENT 10.5 22.8 8.9 7.5 8.9 15.0 19.4 13.7 10.4 4.8 6.3 5.2 8.8 CALMS PERCENT OF WIND 63.3 46.6 61.3 66.3 61.7 58.8 68.1 65.3 74.6 85.9 73.3 76.6 66.9 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 154 169 152 190 206 254 291 152 153 242 191 193 188 VECTOR WIND MAGNITUDE(KNOTS) 1.1 3.4 1.2 0.4 0.5 1.7 1.4 0.7 1.0 0.3 1.3 0.4 0.8 WIND STEADINESES (MEAN %) 36.7 65.4 37.5 16.7 17.2 54.8 70.0 23.3 47.6 33.3 56.5 28.6 30.8 WIND SPEED (MEAN KNOTS) 3.0 5.2 3.2 2.4 2.9 3.1 2.0 3.0 2.1 0.9 2.3 1.4 2.6 FASTEST WIND DIRECTION 140 150 90 170 170 260 300 120 120 120 180 120 150 FASTEST WIND SPEED (KNOTS) 25 35 27 27 35 23 17 29 23 16 35 17 35 DAY 28 23 11 13 8 6 22 30 4 8 24 2 DAYS WITH SKY CLEAR (0-2)/8 10 8 13 12 17 22 31 31 28 30 13 8 223 DAYS WITH P.CLOUDY (3-6)/8 9 6 8 11 7 7 0 0 2 1 14 15 80 DAYS WITH CLOUDY (7-8)/8 12 15 10 7 7 1 0 0 0 0 3 8 63 DAYS WITH VISIBILITY =< 2 KM 4 3 2 2 1 0 0 0 0 0 0 0 12 DURATION OF SUNSHINE HOURS 125.2 99.2 180.7 204.6 253.9 311.0 368.0 354.1 314.3 298.8 200.5 127.9 2838.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 959.2 956.6 956.7 953.2 951.2 947.0 944.2 945.6 950.6 955.2 958.7 958.6 953.1 MAX. QFE PRESSURE IN HPA 971.2 965.3 966.4 959.0 957.0 954.9 949.9 950.1 957.0 961.2 964.2 966.6 971.2 DAY-HOUR 4-18 15-21 12- 6 20-18 14- 6 1-12 5-21 25- 6 28-18 29- 6 30- 6 28- 6 MIN. QFE PRESSURE IN HPA 942.2 943.5 942.9 946.1 943.5 941.5 938.9 940.0 944.2 948.3 947.7 948.9 938.9 DAY-HOUR 30-15 24- 9 30-15 17-15 8-15 16-12 19-15 18-15 4-15 7-12 24-18 15-15 MEAN QNH PRESSURE IN HPA 1023.2 1020.4 1020.6 1016.9 1014.8 1010.4 1007.4 1008.8 1014.1 1019.0 1022.7 1022.6 1016.7 MAX. QNH PRESSURE IN HPA 1035.9 1029.6 1030.8 1023.0 1020.9 1018.7 1013.4 1013.6 1020.9 1025.3 1028.5 1031.0 1035.9 DAY-HOUR 4-18 15-21 12- 6 20-18 14- 6 1-12 5-21 25- 6 28-18 29- 6 30- 6 28- 6 MIN. QNH PRESSURE IN HPA 1005.3 1006.7 1006.0 1009.4 1006.7 1004.6 1001.8 1003.0 1007.4 1011.7 1011.1 1012.4 1001.8 DAY-HOUR 30-15 24- 9 30-15 17-15 8-15 16-12 19-15 18-15 4-15 7-12 24-18 15-15 MEAN QFF PRESSURE IN HPA 1025.1 1021.8 1021.3 1016.0 1012.6 1006.8 1003.2 1004.5 1010.8 1017.1 1022.3 1023.6 1015.4 MAX. QFF PRESSURE IN HPA 1039.3 1031.5 1032.4 1022.0 1018.8 1016.3 1009.1 1009.7 1019.2 1024.3 1030.0 1034.4 1039.3 DAY-HOUR 4-18 15-21 12- 6 20-18 14- 6 1-12 6- 3 25- 6 28-18 29- 6 29- 6 28- 6 MIN. QFF PRESSURE IN HPA 1007.6 1005.8 1005.7 1008.2 1004.4 1000.6 998.2 998.6 1002.5 1008.9 1010.5 1012.1 998.2 DAY-HOUR 30-15 24- 9 30-15 13-12 8-18 16-12 19-15 19- 0 4-15 7-12 24-18 15-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 959.3 956.4 956.7 952.9 951.2 947.0 944.1 945.4 950.4 955.0 958.6 958.6 953.0 MAX. QFE PRESSURE IN HPA 969.6 962.9 965.0 956.7 955.6 952.2 949.1 949.3 955.7 960.2 963.0 965.0 969.6 DAY 5 16 12 20 14 2 6 25 29 29 30 29 MIN. QFE PRESSURE IN HPA 949.4 947.5 945.6 947.0 945.0 942.7 939.8 940.2 945.3 949.4 952.5 950.6 939.8 DAY 31 24 31 18 9 16 19 19 5 7 7 3 MEAN QNH PRESSURE IN HPA 1023.3 1020.2 1020.6 1016.6 1014.8 1010.4 1007.3 1008.7 1014.0 1018.8 1022.6 1022.6 1016.6 MAX. QNH PRESSURE IN HPA 1034.2 1027.1 1029.3 1020.6 1019.4 1015.8 1012.6 1012.8 1019.5 1024.3 1027.2 1029.3 1034.2 DAY 5 16 12 20 14 2 6 25 29 29 30 29 MIN. QNH PRESSURE IN HPA 1012.9 1010.9 1008.9 1010.4 1008.2 1005.8 1002.8 1003.2 1008.6 1012.9 1016.2 1014.2 1002.8 DAY 31 24 31 18 9 16 19 19 5 7 7 3 MEAN QFF PRESSURE IN HPA 1024.9 1021.5 1021.2 1015.6 1012.5 1006.8 1003.1 1004.3 1010.4 1016.5 1021.9 1023.5 1015.2 MAX. QFF PRESSURE IN HPA 1037.3 1029.1 1030.8 1019.8 1017.6 1012.9 1008.2 1008.8 1017.9 1022.7 1028.0 1032.2 1037.3 DAY 5 29 12 3 14 2 6 25 29 29 29 29 MIN. QFF PRESSURE IN HPA 1015.4 1010.7 1008.9 1010.1 1006.1 1001.9 998.7 998.6 1003.5 1010.2 1014.0 1013.8 998.6 DAY 31 24 31 18 9 16 27 19 5 7 7 3 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 959.0 956.1 956.9 953.2 951.5 947.3 944.4 945.9 950.9 955.3 958.9 958.7 953.2 MAX. QFE PRESSURE IN HPA 968.3 962.9 965.9 956.3 956.1 952.0 949.5 949.5 955.9 960.5 963.1 965.4 968.3 DAY 5 12 12 8 14 11 6 25 29 29 30 28 MIN. QFE PRESSURE IN HPA 951.3 944.9 946.7 948.7 945.3 943.2 939.8 941.0 945.7 949.7 953.0 950.6 939.8 DAY 30 24 31 18 9 14 19 19 5 7 22 3 MEAN QNH PRESSURE IN HPA 1023.0 1020.0 1020.7 1016.9 1015.1 1010.7 1007.7 1009.2 1014.4 1019.1 1022.9 1022.7 1016.9 MAX. QNH PRESSURE IN HPA 1032.8 1027.1 1030.3 1020.2 1019.9 1015.6 1013.0 1013.0 1019.7 1024.6 1027.3 1029.7 1032.8 DAY 5 12 12 8 14 11 6 25 29 29 30 28 MIN. QNH PRESSURE IN HPA 1014.9 1008.1 1010.0 1012.1 1008.6 1006.3 1002.8 1004.0 1009.0 1013.2 1016.7 1014.2 1002.8 DAY 30 24 31 18 9 14 19 19 5 7 22 3 MEAN QFF PRESSURE IN HPA 1025.0 1021.4 1021.7 1016.2 1013.2 1007.3 1003.7 1005.1 1011.3 1017.6 1022.7 1023.9 1015.8 MAX. QFF PRESSURE IN HPA 1036.2 1030.4 1032.2 1020.1 1018.4 1013.1 1009.1 1009.4 1018.8 1023.9 1029.1 1032.7 1036.2 DAY 5 29 12 3 14 2 6 25 29 29 29 28 MIN. QFF PRESSURE IN HPA 1016.3 1007.9 1010.1 1012.0 1006.6 1002.1 999.0 1000.0 1004.3 1011.2 1015.3 1014.0 999.0 DAY 2 24 31 17 9 14 19 19 5 7 22 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 960.1 957.1 957.6 954.0 951.8 947.8 944.7 946.3 951.5 956.3 959.8 959.4 953.9 MAX. QFE PRESSURE IN HPA 970.2 964.4 966.4 957.3 957.0 954.6 949.8 950.1 956.8 961.2 964.2 966.6 970.2 DAY 4 15 12 8 14 2 6 25 29 29 30 28 MIN. QFE PRESSURE IN HPA 949.2 944.0 947.6 950.4 946.1 942.5 939.8 941.5 947.0 950.4 953.2 952.2 939.8 DAY 30 24 30 17 6 16 19 19 5 7 7 3 MEAN QNH PRESSURE IN HPA 1024.1 1021.0 1021.6 1017.8 1015.4 1011.2 1007.9 1009.7 1015.1 1020.2 1023.9 1023.5 1017.6 MAX. QNH PRESSURE IN HPA 1034.8 1028.7 1030.8 1021.2 1020.9 1018.4 1013.3 1013.6 1020.7 1025.3 1028.5 1031.0 1034.8 DAY 4 15 12 8 14 2 6 25 29 29 30 28 MIN. QNH PRESSURE IN HPA 1012.7 1007.2 1011.0 1013.9 1009.4 1005.6 1002.8 1004.6 1010.4 1013.9 1016.9 1015.8 1002.8 DAY 30 24 30 17 6 16 19 19 5 7 7 3 MEAN QFF PRESSURE IN HPA 1026.2 1022.5 1022.4 1016.8 1013.2 1007.4 1003.5 1005.2 1011.8 1018.4 1023.7 1024.8 1016.3 MAX. QFF PRESSURE IN HPA 1038.3 1031.3 1032.4 1020.4 1018.8 1016.2 1008.7 1009.7 1019.2 1024.3 1030.0 1034.4 1038.3 DAY 4 29 12 8 14 2 6 25 29 29 29 28 MIN. QFF PRESSURE IN HPA 1014.4 1006.5 1010.5 1012.4 1006.7 1001.2 998.3 1000.4 1006.3 1011.8 1015.2 1015.6 998.3 DAY 30 24 30 14 6 16 19 19 5 7 7 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 959.5 957.0 957.2 953.8 951.5 947.4 944.3 945.9 950.9 955.4 959.0 958.6 953.4 MAX. QFE PRESSURE IN HPA 970.4 964.7 965.7 957.8 956.6 952.4 949.4 949.6 956.3 960.0 963.5 966.3 970.4 DAY 4 15 12 21 14 10 6 25 28 29 30 28 MIN. QFE PRESSURE IN HPA 946.6 943.5 946.3 949.1 943.9 942.4 939.6 941.2 946.5 949.7 952.0 950.7 939.6 DAY 30 24 30 24 8 16 19 19 5 7 7 15 MEAN QNH PRESSURE IN HPA 1023.6 1020.9 1021.1 1017.5 1015.1 1010.8 1007.5 1009.2 1014.5 1019.3 1023.0 1022.6 1017.1 MAX. QNH PRESSURE IN HPA 1035.0 1029.0 1030.1 1021.7 1020.5 1016.0 1012.9 1013.1 1020.2 1024.1 1027.7 1030.7 1035.0 DAY 4 15 12 21 14 10 6 25 28 29 30 28 MIN. QNH PRESSURE IN HPA 1009.9 1006.7 1009.6 1012.6 1007.1 1005.5 1002.6 1004.2 1009.8 1013.2 1015.6 1014.3 1002.6 DAY 30 24 30 24 8 16 19 19 5 7 7 15 MEAN QFF PRESSURE IN HPA 1025.3 1022.1 1021.7 1016.5 1012.8 1007.1 1003.3 1004.7 1010.9 1017.0 1022.3 1023.5 1015.6 MAX. QFF PRESSURE IN HPA 1038.1 1030.9 1031.2 1020.3 1018.5 1012.6 1008.2 1009.4 1018.1 1022.6 1028.1 1033.6 1038.1 DAY 4 29 12 21 14 5 6 25 29 28 30 28 MIN. QFF PRESSURE IN HPA 1012.0 1005.8 1008.9 1010.3 1005.2 1001.6 998.4 999.8 1004.7 1010.5 1013.3 1013.9 998.4 DAY 30 24 30 13 8 16 19 19 5 7 7 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 958.3 955.9 955.9 952.6 950.6 946.5 943.5 944.8 949.8 954.4 957.8 957.8 952.3 MAX. QFE PRESSURE IN HPA 970.0 964.0 964.3 956.2 955.3 954.9 948.0 948.2 955.7 958.8 962.7 965.7 970.0 DAY 4 15 12 8 14 1 6 25 28 29 30 28 MIN. QFE PRESSURE IN HPA 943.4 945.8 944.4 947.3 944.2 941.5 939.3 940.5 944.8 948.3 950.7 949.4 939.3 DAY 30 24 30 13 9 16 19 19 5 7 24 15 MEAN QNH PRESSURE IN HPA 1022.2 1019.8 1019.7 1016.3 1014.2 1009.8 1006.7 1008.0 1013.3 1018.2 1021.8 1021.7 1016.0 MAX. QNH PRESSURE IN HPA 1034.6 1028.3 1028.6 1020.1 1019.1 1018.7 1011.4 1011.6 1019.5 1022.8 1026.9 1030.1 1034.6 DAY 4 15 12 8 14 1 6 25 28 29 30 28 MIN. QNH PRESSURE IN HPA 1006.6 1009.1 1007.6 1010.7 1007.4 1004.6 1002.2 1003.5 1008.0 1011.7 1014.3 1012.9 1002.2 DAY 30 24 30 13 9 16 19 19 5 7 24 15 MEAN QFF PRESSURE IN HPA 1023.9 1021.0 1020.3 1015.2 1011.9 1006.3 1002.6 1003.6 1009.9 1015.9 1021.1 1022.6 1014.5 MAX. QFF PRESSURE IN HPA 1037.5 1029.9 1029.5 1019.2 1017.1 1016.3 1007.1 1008.1 1017.5 1021.3 1027.2 1032.8 1037.5 DAY 4 15 12 8 14 1 6 25 28 28 30 28 MIN. QFF PRESSURE IN HPA 1008.8 1009.4 1007.2 1008.2 1004.8 1000.6 998.3 998.9 1003.0 1008.9 1012.3 1012.1 998.3 DAY 30 24 30 13 9 16 19 19 5 7 7 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 958.7 956.2 955.8 952.3 950.3 946.1 943.2 944.5 949.7 954.6 958.0 958.1 952.3 MAX. QFE PRESSURE IN HPA 970.7 964.0 963.7 957.0 954.9 953.7 947.4 948.1 955.7 959.3 963.0 966.0 970.7 DAY 4 15 12 8 14 1 6 25 28 30 30 28 MIN. QFE PRESSURE IN HPA 942.2 946.6 942.9 946.1 943.5 941.5 938.9 940.0 944.2 948.8 948.1 948.9 938.9 DAY 30 23 30 17 8 22 19 18 4 7 24 15 MEAN QNH PRESSURE IN HPA 1022.7 1020.0 1019.6 1015.9 1013.8 1009.4 1006.3 1007.7 1013.2 1018.4 1022.0 1022.1 1015.9 MAX. QNH PRESSURE IN HPA 1035.3 1028.3 1028.0 1020.9 1018.7 1017.4 1010.8 1011.5 1019.5 1023.3 1027.2 1030.4 1035.3 DAY 4 15 12 8 14 1 6 25 28 30 30 28 MIN. QNH PRESSURE IN HPA 1005.3 1009.9 1006.0 1009.4 1006.7 1004.6 1001.8 1003.0 1007.4 1012.3 1011.5 1012.4 1001.8 DAY 30 23 30 17 8 22 19 18 4 7 24 15 MEAN QFF PRESSURE IN HPA 1024.6 1021.4 1020.5 1015.2 1011.8 1006.1 1002.4 1003.6 1010.1 1016.8 1021.8 1023.3 1014.8 MAX. QFF PRESSURE IN HPA 1038.7 1030.2 1029.3 1020.2 1016.9 1015.3 1006.9 1008.3 1018.1 1022.5 1028.2 1033.6 1038.7 DAY 4 15 12 8 14 1 12 25 28 28 30 28 MIN. QFF PRESSURE IN HPA 1007.6 1009.2 1005.7 1008.3 1004.7 1000.8 998.2 999.0 1002.5 1010.3 1011.3 1012.1 998.2 DAY 30 23 30 13 8 22 19 18 4 7 24 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 959.4 957.0 956.7 953.5 951.2 947.0 944.5 945.9 950.8 955.6 958.8 958.8 953.3 MAX. QFE PRESSURE IN HPA 971.2 964.7 963.5 959.0 956.1 952.8 948.9 949.5 957.0 960.1 963.4 966.5 971.2 DAY 4 15 11 20 14 1 6 25 28 30 30 28 MIN. QFE PRESSURE IN HPA 944.7 948.1 944.8 946.3 943.5 942.9 939.9 940.7 945.2 950.4 947.7 951.7 939.9 DAY 30 23 30 17 8 22 19 18 4 6 24 15 MEAN QNH PRESSURE IN HPA 1023.4 1020.9 1020.5 1017.2 1014.8 1010.4 1007.7 1009.2 1014.3 1019.4 1022.8 1022.8 1017.0 MAX. QNH PRESSURE IN HPA 1035.9 1029.0 1027.7 1023.0 1019.9 1016.5 1012.4 1013.0 1020.9 1024.2 1027.6 1030.9 1035.9 DAY 4 15 11 20 14 1 6 25 28 30 30 28 MIN. QNH PRESSURE IN HPA 1007.9 1011.5 1008.0 1009.6 1006.7 1006.0 1002.9 1003.7 1008.5 1013.9 1011.1 1015.3 1002.9 DAY 30 23 30 17 8 22 19 18 4 6 24 15 MEAN QFF PRESSURE IN HPA 1025.5 1022.4 1021.3 1016.2 1012.5 1006.6 1003.3 1004.7 1011.0 1017.6 1022.6 1024.0 1015.7 MAX. QFF PRESSURE IN HPA 1039.3 1031.1 1029.7 1022.0 1017.9 1013.5 1008.0 1009.1 1019.2 1023.3 1028.8 1034.3 1039.3 DAY 4 15 11 20 13 1 12 25 28 30 30 28 MIN. QFF PRESSURE IN HPA 1009.9 1011.5 1007.4 1008.7 1004.4 1002.1 998.7 999.5 1004.2 1011.3 1010.5 1014.9 998.7 DAY 30 23 30 17 8 22 19 18 4 7 24 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 959.4 957.0 956.9 953.5 951.6 947.4 944.7 946.1 950.8 955.5 959.0 958.7 953.4 MAX. QFE PRESSURE IN HPA 970.5 965.3 964.6 957.1 956.4 952.6 949.9 949.5 956.7 960.1 963.4 966.0 970.5 DAY 4 15 11 11 14 1 5 25 28 30 30 28 MIN. QFE PRESSURE IN HPA 947.0 947.1 945.5 947.0 945.0 943.3 940.5 940.7 945.6 950.2 953.3 950.7 940.5 DAY 30 23 30 17 8 22 19 18 4 6 6 2 MEAN QNH PRESSURE IN HPA 1023.5 1020.8 1020.8 1017.2 1015.2 1010.8 1007.9 1009.4 1014.4 1019.3 1023.0 1022.7 1017.1 MAX. QNH PRESSURE IN HPA 1035.1 1029.6 1028.9 1021.0 1020.3 1016.3 1013.4 1013.0 1020.6 1024.2 1027.6 1030.4 1035.1 DAY 4 15 11 11 14 1 5 25 28 30 30 28 MIN. QNH PRESSURE IN HPA 1010.4 1010.5 1008.8 1010.4 1008.2 1006.5 1003.5 1003.7 1008.9 1013.7 1017.0 1014.3 1003.5 DAY 30 23 30 17 8 22 19 18 4 6 6 2 MEAN QFF PRESSURE IN HPA 1025.2 1022.1 1021.3 1016.1 1012.8 1007.1 1003.6 1004.9 1010.9 1017.1 1022.3 1023.6 1015.6 MAX. QFF PRESSURE IN HPA 1038.3 1031.5 1030.5 1020.0 1018.1 1013.1 1008.7 1009.0 1018.9 1022.6 1028.4 1033.6 1038.3 DAY 4 15 11 19 14 1 5 25 28 30 30 28 MIN. QFF PRESSURE IN HPA 1012.7 1010.0 1008.2 1010.0 1006.1 1002.4 999.3 999.3 1003.8 1010.8 1014.8 1014.0 999.3 DAY 30 23 30 17 8 22 19 18 4 6 6 2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.5 8.0 11.5 16.6 22.2 28.9 33.2 31.6 27.2 22.1 12.7 10.4 19.3 MINIMUN AIR TEMPERATURE (C) 1.2 2.0 4.4 9.9 14.5 17.6 21.3 20.0 15.5 14.1 7.7 5.6 11.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 3 15 11 0 0 0 0 29 DAYS WITH MINIMUM TEMP. <=-4 0 2 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH FREEZING MIN.<= 0 14 10 4 0 0 0 0 0 0 0 2 0 30 TEMPERATURE RECORDS LOWEST(C) -3.6 -5.5 -0.5 4.4 8.6 14.2 17.0 16.5 9.5 11.2 -0.8 1.6 -5.5 DAY 18 16 15 13 4 5 2 16 25 30 29 5 MAXIMUM AIR TEMPERATURE (C) 12.7 14.3 18.6 24.1 29.9 38.1 43.0 41.6 38.2 31.0 19.3 17.1 27.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 16 30 31 31 30 25 0 0 166 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 23.2 29.2 33.2 36.0 43.2 46.6 44.4 42.5 36.5 26.2 21.6 46.6 DAY 8 27 31 19 30 26 17 30 1 1 1 22 DIF. BETWEEN (MAX.-MIN.) (C) 11.5 12.3 14.2 14.2 15.4 20.5 21.7 21.6 22.7 16.9 11.6 11.5 16.2 MEAN DAILY TEMP. (MDT) (C) 6.9 8.1 11.5 17.0 22.2 27.9 32.1 30.8 26.9 22.5 13.5 11.3 19.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 6.2 64.8 206.7 344.9 304.3 175.6 63.6 0.0 0.0 1166.3 HEATING DEG. DAYS(BASE 18 0C) 342.6 276.5 200.6 51.5 2.3 0.0 0.0 0.0 0.0 4.0 140.4 207.4 1225.2 DEWPOINT (MEAN C) 0.0 1.3 2.5 8.7 10.4 5.1 8.3 6.8 1.2 3.9 6.4 6.1 5.1 MIXING RATIO (G/KG) 4.18 4.57 4.95 7.58 8.53 5.94 7.45 6.68 4.54 5.54 6.59 6.23 6.07 VAPOUR PRESSURE (HPA) 6.40 6.98 7.53 11.48 12.87 8.95 11.16 10.05 6.87 8.44 10.03 9.52 9.19 SATURATION DEF. (HPA) 3.70 4.37 6.91 8.56 15.62 34.17 44.10 40.10 32.75 19.98 5.57 3.54 18.28 RELATIVE HUMIDITY (MEAN %) 68 67 59 64 53 26 24 25 23 36 69 77 49 RELATIVE HUMIDITY (MAX. %) 90 89 84 86 80 47 41 41 40 53 88 91 69 RELATIVE HUMIDITY (MIN. %) 41 38 30 38 27 12 13 11 7 18 42 50 27 RELATIVE HUMIDITY (MEAN% 03UTC) 80 83 79 79 70 43 37 38 38 47 82 86 64 RELATIVE HUMIDITY (MEAN% 09UTC) 49 45 37 48 31 13 15 12 9 22 50 57 32 RELATIVE HUMIDITY (MEAN% 15UTC) 63 56 44 56 40 14 15 14 12 31 65 75 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 65.8 36.3 46.7 99.9 28.3 2.0 0.0 0.0 0.0 60.0 79.1 48.8 466.9 DAYS WITH PRECIPITATION >=10 2 1 2 4 1 0 0 0 0 3 3 2 18 DAYS WITH PRECIPITATION >= 5 5 3 3 7 2 0 0 0 0 3 5 4 32 DAYS WITH PRECIPITATION >= 1 7 7 6 9 3 1 0 0 0 3 7 6 49 DAYS WITH PRECIPITATION 10 8 8 12 12 1 0 0 0 3 12 8 74 GREATEST DAILY PRECIPITATION 18.0 14.0 15.0 24.0 19.0 2.0 0.0 0.0 0.0 37.0 23.0 16.0 37.0 DAY 7 2 18 25 13 1 ** ** ** 28 2 15 DAY WITH THUNDER STORM 0 2 2 5 7 1 0 0 0 4 8 3 32 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 1 1 0 2 4 0 0 0 0 0 0 8 WIND DIRECTION (PREVAILING) 135 270 270 180 135 270 270 270 270 135 180 135 270 PREVAILING WIND SPEED(KNOTS) 12.8 6.9 6.5 8.3 9.9 7.8 7.0 7.5 6.5 9.4 9.5 10.0 7.0 PREVAILING WIND PERCENT 8.1 7.6 6.9 8.8 16.1 16.3 14.5 11.3 11.3 8.1 9.6 2.8 7.9 CALMS PERCENT OF WIND 67.7 69.2 70.6 70.8 57.3 53.8 65.7 67.7 73.3 79.0 80.4 91.1 70.6 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 164 228 215 188 145 268 264 266 277 144 197 152 209 VECTOR WIND MAGNITUDE(KNOTS) 1.3 0.7 1.1 1.2 1.1 1.3 0.3 1.1 0.8 0.7 1.2 0.2 0.6 WIND STEADINESES (MEAN %) 41.9 31.8 44.0 52.2 30.6 35.1 10.7 44.0 44.4 41.2 70.6 28.6 25.0 WIND SPEED (MEAN KNOTS) 3.1 2.2 2.5 2.3 3.6 3.7 2.8 2.5 1.8 1.7 1.7 0.7 2.4 FASTEST WIND DIRECTION 210 130 190 130 120 210 120 300 280 360 280 150 360 FASTEST WIND SPEED (KNOTS) 27 19 31 23 23 27 21 23 17 39 23 16 39 DAY 8 10 3 8 1 7 23 19 1 28 25 14 DAYS WITH SKY CLEAR (0-2)/8 18 11 13 9 7 28 28 28 28 23 15 14 222 DAYS WITH P.CLOUDY (3-6)/8 5 10 15 13 19 2 2 3 2 5 6 11 93 DAYS WITH CLOUDY (7-8)/8 8 7 3 8 5 0 1 0 0 3 9 6 50 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 1 0 0 0 0 0 1 2 DURATION OF SUNSHINE HOURS 193.3 179.3 235.4 219.4 238.5 367.2 355.6 186.4 301.7 262.3 187.4 ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 959.3 957.8 955.4 953.8 951.9 947.3 943.5 945.8 949.5 956.4 957.6 960.4 953.2 MAX. QFE PRESSURE IN HPA 966.4 965.6 962.8 959.8 958.0 951.9 948.2 951.3 954.4 962.1 963.8 967.4 967.4 DAY-HOUR 27- 6 7-18 23- 6 16- 9 14-18 21-21 26- 6 18-21 30-18 17- 6 29-18 26- 6 MIN. QFE PRESSURE IN HPA 944.4 945.9 943.6 943.7 944.3 940.8 937.7 941.0 945.2 950.8 946.0 954.0 937.7 DAY-HOUR 7-21 2-12 7-15 25-12 31- 0 25-15 14-15 4-15 8-12 3-15 11- 3 8- 3 MEAN QNH PRESSURE IN HPA 1023.3 1021.8 1019.3 1017.6 1015.5 1010.7 1006.7 1009.0 1012.9 1020.2 1021.5 1024.5 1016.9 MAX. QNH PRESSURE IN HPA 1030.8 1030.0 1027.0 1023.8 1021.9 1015.5 1011.6 1014.9 1018.2 1026.3 1028.1 1031.9 1031.9 DAY-HOUR 27- 6 7-18 23- 6 16- 9 14-18 21-21 26- 6 18-21 30-18 17- 6 29-18 26- 6 MIN. QNH PRESSURE IN HPA 1007.6 1009.2 1006.8 1006.9 1007.5 1003.8 1000.6 1004.0 1008.5 1014.4 1009.3 1017.7 1000.6 DAY-HOUR 7-21 2-12 7-15 25-12 31- 0 25-15 14-15 4-15 8-12 3-15 11- 3 8- 3 MEAN QFF PRESSURE IN HPA 1024.7 1022.7 1019.4 1016.4 1013.1 1006.9 1001.9 1004.7 1009.6 1017.9 1021.3 1024.9 1015.3 MAX. QFF PRESSURE IN HPA 1032.7 1031.5 1028.5 1022.0 1020.2 1012.3 1006.6 1010.6 1015.8 1024.9 1030.3 1032.8 1032.8 DAY-HOUR 26- 6 7-21 23- 6 16- 9 14-18 5- 9 26- 6 18-21 30-18 30- 6 29-18 26- 6 MIN. QFF PRESSURE IN HPA 1006.5 1008.7 1004.8 1004.9 1003.8 999.6 996.2 998.6 1005.1 1011.7 1007.6 1017.1 996.2 DAY-HOUR 7-21 2-12 7-21 25-12 31- 0 26-12 14-15 4-15 8-12 3-12 11- 3 8- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 959.4 957.8 955.3 953.5 951.7 947.5 943.5 945.7 949.2 956.2 957.3 960.5 953.1 MAX. QFE PRESSURE IN HPA 965.8 964.9 961.8 958.6 957.2 951.9 947.0 950.3 951.8 960.2 963.2 966.2 966.2 DAY 27 8 23 16 15 22 26 19 30 17 30 26 MIN. QFE PRESSURE IN HPA 944.4 948.0 945.2 947.2 944.3 941.7 939.1 941.9 946.0 952.0 946.6 956.0 939.1 DAY 8 3 8 26 31 26 10 4 8 3 11 4 MEAN QNH PRESSURE IN HPA 1023.5 1021.8 1019.1 1017.2 1015.3 1010.9 1006.7 1009.0 1012.7 1020.0 1021.2 1024.5 1016.8 MAX. QNH PRESSURE IN HPA 1030.2 1029.2 1026.0 1022.6 1021.1 1015.5 1010.4 1013.8 1015.4 1024.3 1027.4 1030.6 1030.6 DAY 27 8 23 16 15 22 26 19 30 17 30 26 MIN. QNH PRESSURE IN HPA 1007.6 1011.4 1008.5 1010.6 1007.5 1004.8 1002.0 1005.0 1009.3 1015.6 1009.9 1019.8 1002.0 DAY 8 3 8 26 31 26 10 4 8 3 11 4 MEAN QFF PRESSURE IN HPA 1024.6 1022.6 1019.1 1015.9 1012.8 1007.2 1001.9 1004.6 1009.1 1017.5 1020.8 1024.7 1015.1 MAX. QFF PRESSURE IN HPA 1031.2 1031.0 1027.1 1021.0 1019.1 1012.3 1005.8 1009.7 1012.7 1022.6 1028.8 1030.6 1031.2 DAY 27 8 23 16 15 22 26 19 30 30 30 26 MIN. QFF PRESSURE IN HPA 1007.0 1012.0 1006.4 1009.2 1003.8 1000.6 997.6 1000.3 1005.9 1012.6 1008.6 1018.9 997.6 DAY 8 3 8 26 31 26 10 4 8 2 11 8 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 959.3 958.0 955.4 953.8 951.8 947.6 943.9 946.0 949.5 956.5 957.3 960.3 953.3 MAX. QFE PRESSURE IN HPA 965.2 964.7 961.8 959.1 957.2 951.9 947.7 950.0 952.8 960.6 963.0 966.3 966.3 DAY 27 8 23 16 15 22 26 19 30 17 30 26 MIN. QFE PRESSURE IN HPA 948.1 949.0 947.2 948.0 944.3 941.8 939.7 941.9 946.0 952.0 946.0 954.0 939.7 DAY 8 3 5 26 31 26 10 4 8 3 11 8 MEAN QNH PRESSURE IN HPA 1023.4 1022.0 1019.2 1017.5 1015.4 1011.0 1007.0 1009.3 1013.0 1020.4 1021.2 1024.3 1017.0 MAX. QNH PRESSURE IN HPA 1029.5 1029.0 1026.0 1023.1 1021.1 1015.5 1011.1 1013.5 1016.5 1024.7 1027.2 1030.7 1030.7 DAY 27 8 23 16 15 22 26 19 30 17 30 26 MIN. QNH PRESSURE IN HPA 1011.5 1012.5 1010.6 1011.4 1007.5 1004.9 1002.7 1005.0 1009.3 1015.6 1009.3 1017.7 1002.7 DAY 8 3 5 26 31 26 10 4 8 3 11 8 MEAN QFF PRESSURE IN HPA 1025.0 1023.2 1019.6 1016.6 1013.2 1007.4 1002.5 1005.1 1010.0 1018.4 1021.2 1025.0 1015.6 MAX. QFF PRESSURE IN HPA 1031.3 1030.7 1027.4 1021.9 1019.3 1012.2 1006.6 1009.7 1014.4 1023.3 1029.2 1031.3 1031.3 DAY 27 8 23 16 15 5 26 19 30 30 30 26 MIN. QFF PRESSURE IN HPA 1011.7 1013.3 1009.5 1009.0 1004.0 1000.8 998.2 999.7 1006.5 1013.1 1007.6 1017.1 998.2 DAY 8 3 5 20 31 26 10 4 8 3 11 8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 960.3 958.9 956.4 954.5 952.6 947.8 944.2 946.5 950.3 957.5 958.3 961.3 954.0 MAX. QFE PRESSURE IN HPA 966.4 965.1 962.8 959.3 956.7 951.9 948.2 950.7 953.8 962.1 963.0 967.4 967.4 DAY 27 8 23 16 15 22 26 19 30 17 29 26 MIN. QFE PRESSURE IN HPA 949.8 951.0 947.4 948.5 945.3 942.1 939.7 943.0 946.0 953.1 949.7 955.0 939.7 DAY 8 3 5 20 31 26 10 4 8 3 11 8 MEAN QNH PRESSURE IN HPA 1024.4 1022.9 1020.2 1018.3 1016.3 1011.2 1007.4 1009.8 1013.8 1021.5 1022.2 1025.4 1017.8 MAX. QNH PRESSURE IN HPA 1030.8 1029.4 1027.0 1023.3 1020.6 1015.5 1011.6 1014.3 1017.5 1026.3 1027.2 1031.9 1031.9 DAY 27 8 23 16 15 22 26 19 30 17 29 26 MIN. QNH PRESSURE IN HPA 1013.3 1014.6 1010.8 1011.9 1008.6 1005.2 1002.7 1006.1 1009.3 1016.8 1013.2 1018.8 1002.7 DAY 8 3 5 20 31 26 10 4 8 3 11 8 MEAN QFF PRESSURE IN HPA 1026.1 1024.1 1020.5 1017.1 1013.8 1007.2 1002.5 1005.3 1010.4 1019.3 1022.2 1026.1 1016.2 MAX. QFF PRESSURE IN HPA 1032.7 1031.1 1028.5 1022.0 1018.9 1012.1 1006.6 1009.8 1015.3 1024.9 1029.4 1032.8 1032.8 DAY 26 8 23 15 8 5 26 19 30 30 29 26 MIN. QFF PRESSURE IN HPA 1012.6 1015.4 1010.4 1009.4 1004.8 1000.8 997.8 1000.9 1006.4 1014.1 1011.9 1018.6 997.8 DAY 8 3 5 20 31 26 10 4 8 3 11 8 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 959.6 958.2 955.8 954.4 952.5 947.5 943.7 945.9 949.8 956.8 957.9 960.7 953.6 MAX. QFE PRESSURE IN HPA 965.5 965.3 961.2 959.8 957.6 951.4 947.7 950.0 953.8 961.8 963.2 966.0 966.0 DAY 26 7 23 16 14 5 26 19 30 30 29 26 MIN. QFE PRESSURE IN HPA 949.3 949.1 946.9 947.3 946.5 941.8 939.7 942.6 946.0 952.3 950.2 955.0 939.7 DAY 8 2 5 25 2 26 10 1 8 3 11 14 MEAN QNH PRESSURE IN HPA 1023.6 1022.1 1019.6 1018.2 1016.1 1010.9 1006.9 1009.2 1013.3 1020.7 1021.9 1024.8 1017.3 MAX. QNH PRESSURE IN HPA 1029.9 1029.6 1025.3 1023.8 1021.5 1015.0 1011.1 1013.5 1017.5 1026.0 1027.4 1030.4 1030.4 DAY 26 7 23 16 14 5 26 19 30 30 29 26 MIN. QNH PRESSURE IN HPA 1012.8 1012.6 1010.2 1010.7 1009.8 1004.9 1002.7 1005.7 1009.3 1015.9 1013.7 1018.8 1002.7 DAY 8 2 5 25 2 26 10 1 8 3 11 14 MEAN QFF PRESSURE IN HPA 1024.7 1022.9 1019.6 1016.9 1013.7 1007.1 1002.1 1004.8 1009.7 1018.2 1021.4 1024.9 1015.5 MAX. QFF PRESSURE IN HPA 1031.1 1030.9 1026.1 1022.0 1019.8 1012.3 1006.4 1009.4 1014.9 1024.6 1029.1 1030.2 1031.1 DAY 26 7 23 16 14 5 26 19 30 30 29 26 MIN. QFF PRESSURE IN HPA 1011.9 1012.4 1009.4 1009.2 1006.5 1000.5 998.0 1000.7 1006.0 1013.0 1012.7 1017.9 998.0 DAY 8 2 3 25 31 26 10 1 8 3 11 14 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 958.1 956.7 954.5 953.3 951.4 946.6 942.8 945.0 948.7 955.5 957.0 959.6 952.4 MAX. QFE PRESSURE IN HPA 963.8 964.7 959.5 958.7 957.5 950.0 946.2 949.0 953.2 960.7 962.1 964.9 964.9 DAY 26 7 23 16 14 5 26 19 30 30 29 26 MIN. QFE PRESSURE IN HPA 948.2 945.9 945.1 943.7 945.8 940.8 938.3 941.4 945.2 950.9 949.3 954.3 938.3 DAY 8 2 5 25 30 26 14 4 8 3 10 14 MEAN QNH PRESSURE IN HPA 1022.1 1020.6 1018.3 1017.0 1015.0 1010.0 1005.9 1008.2 1012.1 1019.3 1020.9 1023.6 1016.1 MAX. QNH PRESSURE IN HPA 1028.1 1029.0 1023.5 1022.7 1021.4 1013.5 1009.5 1012.5 1016.9 1024.8 1026.3 1029.2 1029.2 DAY 26 7 23 16 14 5 26 19 30 30 29 26 MIN. QNH PRESSURE IN HPA 1011.6 1009.2 1008.4 1006.9 1009.1 1003.8 1001.2 1004.5 1008.5 1014.5 1012.8 1018.0 1001.2 DAY 8 2 5 25 30 26 14 4 8 3 10 14 MEAN QFF PRESSURE IN HPA 1023.2 1021.4 1018.3 1015.7 1012.6 1006.3 1001.2 1003.9 1008.6 1016.9 1020.5 1023.7 1014.3 MAX. QFF PRESSURE IN HPA 1029.5 1030.5 1024.2 1020.9 1019.8 1010.8 1005.1 1008.5 1014.1 1023.5 1027.7 1028.9 1030.5 DAY 23 7 23 15 14 5 7 19 30 30 29 26 MIN. QFF PRESSURE IN HPA 1011.0 1008.7 1008.2 1004.9 1005.9 999.6 996.6 999.7 1005.1 1011.7 1011.6 1017.5 996.6 DAY 8 2 5 25 30 26 14 4 8 3 10 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 958.6 957.1 954.7 953.1 951.1 946.2 942.5 944.7 948.7 955.6 957.4 960.1 952.5 MAX. QFE PRESSURE IN HPA 964.1 964.7 959.3 958.4 957.3 949.5 945.6 948.3 953.2 960.5 962.6 965.5 965.5 DAY 26 7 23 16 14 21 26 18 30 30 29 26 MIN. QFE PRESSURE IN HPA 946.7 945.9 943.6 946.5 945.3 940.8 937.7 941.0 946.0 950.8 948.9 955.3 937.7 DAY 7 2 7 26 30 25 14 4 8 3 10 4 MEAN QNH PRESSURE IN HPA 1022.5 1021.0 1018.5 1016.8 1014.7 1009.5 1005.6 1007.9 1012.1 1019.4 1021.3 1024.2 1016.1 MAX. QNH PRESSURE IN HPA 1028.4 1029.0 1023.3 1022.4 1021.2 1013.0 1008.9 1011.7 1016.9 1024.6 1026.8 1029.9 1029.9 DAY 26 7 23 16 14 21 26 18 30 30 29 26 MIN. QNH PRESSURE IN HPA 1010.0 1009.2 1006.8 1009.8 1008.6 1003.8 1000.6 1004.0 1009.3 1014.4 1012.4 1019.1 1000.6 DAY 7 2 7 26 30 25 14 4 8 3 10 4 MEAN QFF PRESSURE IN HPA 1024.1 1022.1 1018.8 1015.8 1012.4 1005.9 1001.0 1003.7 1009.1 1017.4 1021.3 1024.7 1014.7 MAX. QFF PRESSURE IN HPA 1030.1 1030.6 1024.5 1021.0 1019.8 1010.2 1004.6 1007.8 1014.6 1023.9 1028.7 1030.6 1030.6 DAY 26 7 23 16 14 5 26 18 30 30 29 26 MIN. QFF PRESSURE IN HPA 1010.1 1009.4 1006.1 1008.6 1004.5 999.6 996.2 998.6 1006.2 1012.0 1011.4 1019.8 996.2 DAY 7 2 7 26 30 26 14 4 2 3 10 14 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 959.4 957.9 955.7 954.2 952.0 947.5 943.7 946.1 949.8 956.5 957.8 960.7 953.4 MAX. QFE PRESSURE IN HPA 965.4 965.6 960.8 959.0 958.0 951.3 947.4 950.0 954.4 960.9 963.8 965.6 965.6 DAY 26 7 22 15 14 21 26 18 30 17 29 26 MIN. QFE PRESSURE IN HPA 945.6 946.6 945.0 947.6 945.8 942.0 939.8 942.3 947.1 952.1 947.1 956.2 939.8 DAY 7 2 7 26 30 25 14 3 8 3 10 14 MEAN QNH PRESSURE IN HPA 1023.5 1021.9 1019.6 1017.9 1015.6 1010.9 1006.8 1009.4 1013.4 1020.4 1021.7 1024.8 1017.1 MAX. QNH PRESSURE IN HPA 1029.7 1030.0 1024.9 1023.0 1021.9 1014.9 1010.8 1013.5 1018.2 1025.0 1028.1 1030.0 1030.0 DAY 26 7 22 15 14 21 26 18 30 17 29 26 MIN. QNH PRESSURE IN HPA 1008.9 1009.9 1008.2 1011.0 1009.1 1005.1 1002.8 1005.4 1010.5 1015.7 1010.5 1020.1 1002.8 DAY 7 2 7 26 30 25 14 3 8 3 10 14 MEAN QFF PRESSURE IN HPA 1025.1 1023.0 1019.8 1016.7 1013.1 1006.8 1002.0 1004.9 1010.0 1018.2 1021.7 1025.4 1015.6 MAX. QFF PRESSURE IN HPA 1031.7 1031.5 1026.3 1021.8 1020.2 1011.4 1005.8 1009.0 1015.8 1024.1 1030.3 1030.7 1031.7 DAY 26 7 22 15 14 21 26 18 30 30 29 26 MIN. QFF PRESSURE IN HPA 1007.9 1010.1 1006.8 1009.8 1005.1 1000.8 997.8 1000.3 1006.7 1012.6 1009.3 1019.4 997.8 DAY 7 2 7 26 30 26 14 3 2 3 10 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 959.5 958.1 955.8 953.9 952.1 947.9 944.0 946.4 949.8 956.5 958.0 960.6 953.5 MAX. QFE PRESSURE IN HPA 966.0 965.6 961.6 959.1 956.8 951.9 947.0 951.3 954.4 960.9 963.5 965.1 966.0 DAY 26 7 22 16 14 21 25 18 30 17 29 25 MIN. QFE PRESSURE IN HPA 944.4 947.4 943.8 946.4 945.1 942.3 940.2 942.6 947.0 952.6 948.5 956.0 940.2 DAY 7 2 7 25 30 25 14 3 7 1 10 3 MEAN QNH PRESSURE IN HPA 1023.5 1022.0 1019.7 1017.7 1015.7 1011.3 1007.2 1009.7 1013.4 1020.4 1021.9 1024.6 1017.3 MAX. QNH PRESSURE IN HPA 1030.4 1030.0 1025.7 1023.1 1020.7 1015.5 1010.4 1014.9 1018.2 1025.0 1027.7 1029.4 1030.4 DAY 26 7 22 16 14 21 25 18 30 17 29 25 MIN. QNH PRESSURE IN HPA 1007.6 1010.8 1007.0 1009.7 1008.4 1005.4 1003.2 1005.7 1010.4 1016.3 1011.9 1019.8 1003.2 DAY 7 2 7 25 30 25 14 3 7 1 10 3 MEAN QFF PRESSURE IN HPA 1024.6 1022.8 1019.6 1016.4 1013.1 1007.5 1002.4 1005.2 1009.8 1017.9 1021.6 1024.7 1015.5 MAX. QFF PRESSURE IN HPA 1031.4 1031.5 1026.9 1021.6 1018.8 1011.7 1005.6 1010.6 1015.3 1023.1 1029.3 1029.5 1031.5 DAY 26 7 22 16 14 21 25 18 30 30 29 25 MIN. QFF PRESSURE IN HPA 1006.5 1010.8 1004.8 1008.5 1004.7 1001.2 998.4 1000.7 1006.6 1013.0 1010.7 1020.1 998.4 DAY 7 2 7 25 30 25 23 3 2 1 10 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.0 8.9 13.1 19.7 24.4 29.3 32.3 30.5 29.2 22.7 13.7 6.1 20.0 MINIMUN AIR TEMPERATURE (C) 5.3 3.7 6.7 12.1 14.6 18.1 21.3 19.5 20.0 16.0 9.4 2.1 12.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 4 1 19 6 7 2 0 0 40 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 2 2 DAYS WITH FREEZING MIN.<= 0 0 6 0 0 0 0 0 0 0 0 0 16 22 TEMPERATURE RECORDS LOWEST(C) 0.2 -2.2 1.4 5.0 8.8 13.0 17.0 16.2 17.0 12.6 3.2 -4.2 -4.2 DAY 28 4 17 4 18 5 1 20 30 13 11 7 MAXIMUM AIR TEMPERATURE (C) 15.6 15.1 19.9 27.8 32.9 38.6 41.2 40.6 37.7 30.3 19.5 11.6 27.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 18 30 31 31 30 20 0 0 167 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.0 20.0 27.2 34.0 42.6 43.4 43.8 44.2 41.0 34.5 26.6 15.6 44.2 DAY 1 27 31 22 31 9 2 14 1 8 2 2 DIF. BETWEEN (MAX.-MIN.) (C) 10.3 11.4 13.2 15.7 18.3 20.5 19.9 21.1 17.7 14.3 10.1 9.5 15.2 MEAN DAILY TEMP. (MDT) (C) 10.5 9.4 13.3 19.9 23.8 28.4 31.3 30.0 28.9 23.1 14.4 6.8 20.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 20.9 101.1 220.7 318.2 280.5 235.7 70.0 0.0 0.0 1247.1 HEATING DEG. DAYS(BASE 18 0C) 233.9 240.8 146.6 12.8 0.2 0.0 0.0 0.0 0.0 0.0 111.3 345.8 1091.4 DEWPOINT (MEAN C) 4.9 2.5 5.5 8.4 5.1 2.2 7.6 5.5 4.9 7.5 8.9 1.2 5.3 MIXING RATIO (G/KG) 5.87 4.90 6.02 7.53 6.01 4.94 7.19 6.26 6.10 7.26 7.73 4.52 6.19 VAPOUR PRESSURE (HPA) 8.94 7.48 9.15 11.39 9.10 7.44 10.75 9.39 9.22 11.02 11.73 6.93 9.38 SATURATION DEF. (HPA) 3.76 4.39 6.71 12.97 24.50 36.52 40.79 37.75 33.66 17.85 4.46 2.88 18.85 RELATIVE HUMIDITY (MEAN %) 73 67 64 54 36 22 25 24 26 44 75 74 49 RELATIVE HUMIDITY (MAX. %) 89 86 84 79 63 41 43 42 44 62 91 91 68 RELATIVE HUMIDITY (MIN. %) 51 41 39 27 15 8 12 10 12 26 53 48 29 RELATIVE HUMIDITY (MEAN% 03UTC) 81 81 76 69 59 38 41 39 37 59 84 86 63 RELATIVE HUMIDITY (MEAN% 09UTC) 58 50 45 37 18 10 14 12 14 29 59 55 33 RELATIVE HUMIDITY (MEAN% 15UTC) 71 58 53 40 19 11 15 13 19 36 71 67 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 107.4 42.4 67.3 71.9 6.6 0.8 0.0 0.0 0.7 60.8 160.7 80.9 599.5 DAYS WITH PRECIPITATION >=10 4 1 2 2 0 0 0 0 0 2 6 3 20 DAYS WITH PRECIPITATION >= 5 6 2 3 4 1 0 0 0 0 2 8 8 34 DAYS WITH PRECIPITATION >= 1 13 11 5 7 1 0 0 0 0 4 12 9 62 DAYS WITH PRECIPITATION 13 14 10 13 5 1 0 0 2 7 17 13 95 GREATEST DAILY PRECIPITATION 25.0 14.7 34.0 34.0 6.0 0.8 0.0 0.0 0.6 37.4 39.0 19.0 39.0 DAY 16 28 14 26 6 4 ** ** 9 19 23 20 DAY WITH THUNDER STORM 7 1 3 8 3 1 0 0 1 4 7 1 36 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 2 2 DAYS WITH DUST 0 0 0 0 3 0 0 0 1 1 0 0 5 WIND DIRECTION (PREVAILING) 135 180 180 180 270 270 270 270 135 135 225 135 270 PREVAILING WIND SPEED(KNOTS) 10.8 9.9 10.2 7.1 6.5 8.2 7.7 7.3 12.1 11.0 7.8 11.9 7.4 PREVAILING WIND PERCENT 9.3 6.7 6.9 5.8 6.0 10.8 17.3 14.1 16.3 12.9 5.4 5.6 6.5 CALMS PERCENT OF WIND 75.8 80.8 77.8 73.3 73.8 72.5 70.2 73.8 67.9 73.0 80.8 78.6 74.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 160 184 182 191 246 285 276 281 140 142 190 177 204 VECTOR WIND MAGNITUDE(KNOTS) 1.1 1.0 1.0 0.6 0.8 1.5 1.4 1.3 1.7 1.1 0.7 0.9 0.6 WIND STEADINESES (MEAN %) 55.0 62.5 47.6 27.3 38.1 68.2 63.6 72.2 54.8 45.8 50.0 52.9 28.6 WIND SPEED (MEAN KNOTS) 2.0 1.6 2.1 2.2 2.1 2.2 2.2 1.8 3.1 2.4 1.4 1.7 2.1 FASTEST WIND DIRECTION 140 150 150 210 210 260 120 270 220 300 240 140 150 FASTEST WIND SPEED (KNOTS) 19 23 31 23 23 25 17 16 19 23 19 31 31 DAY 29 28 6 1 4 4 2 25 20 14 5 29 DAYS WITH SKY CLEAR (0-2)/8 12 8 13 12 21 30 31 31 26 16 10 13 223 DAYS WITH P.CLOUDY (3-6)/8 13 13 10 12 8 0 0 0 3 13 4 10 86 DAYS WITH CLOUDY (7-8)/8 6 7 8 6 2 0 0 0 1 2 16 8 56 DAYS WITH VISIBILITY =< 2 KM 1 0 0 1 2 0 0 0 0 0 0 2 6 DURATION OF SUNSHINE HOURS ****** 158.9 204.6 235.1 291.3 370.7 377.6 369.5 287.5 248.4 144.5 155.4 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 957.3 956.5 954.9 953.5 950.9 944.8 941.2 943.9 950.7 956.2 956.5 961.5 952.3 MAX. QFE PRESSURE IN HPA 965.6 963.0 963.2 958.8 958.2 949.4 944.8 947.8 957.9 962.2 963.5 969.5 969.5 DAY-HOUR 18- 6 25-18 18- 6 16-18 17- 9 18- 6 1- 3 8- 9 23-18 23- 6 10- 6 6-21 MIN. QFE PRESSURE IN HPA 945.4 947.2 941.4 946.2 942.7 940.5 938.6 940.1 941.6 951.1 947.0 947.5 938.6 DAY-HOUR 31-15 11-21 11-18 1-12 31-15 27-15 15-12 18-12 1-12 6-12 16-21 3-12 MEAN QNH PRESSURE IN HPA 1021.3 1020.4 1018.7 1017.2 1014.5 1008.0 1004.2 1007.1 1014.2 1020.1 1020.3 1025.7 1016.0 MAX. QNH PRESSURE IN HPA 1030.0 1027.2 1027.4 1022.8 1022.2 1012.9 1008.0 1011.2 1021.8 1026.4 1027.7 1034.1 1034.1 DAY-HOUR 18- 6 25-18 18- 6 16-18 17- 9 18- 6 1- 3 8- 9 23-18 23- 6 10- 6 6-21 MIN. QNH PRESSURE IN HPA 1008.7 1010.6 1004.5 1009.5 1005.8 1003.5 1001.5 1003.1 1004.7 1014.7 1010.4 1010.9 1001.5 DAY-HOUR 31-15 11-21 11-18 1-12 31-15 27-15 15-12 18-12 1-12 6-12 16-21 3-12 MEAN QFF PRESSURE IN HPA 1021.7 1021.1 1018.4 1015.3 1011.7 1004.1 999.7 1003.0 1010.4 1017.6 1019.8 1027.1 1014.2 MAX. QFF PRESSURE IN HPA 1031.6 1029.0 1027.9 1021.2 1020.6 1009.2 1004.6 1007.0 1018.8 1024.8 1028.6 1037.1 1037.1 DAY-HOUR 18- 6 4- 6 18- 6 11- 6 17- 9 18- 3 1- 3 8- 9 24- 6 23- 6 10- 6 6-21 MIN. QFF PRESSURE IN HPA 1008.7 1009.9 1003.8 1006.8 1000.8 999.8 996.5 998.1 1000.3 1011.5 1009.3 1010.9 996.5 DAY-HOUR 31-15 11-21 11-18 1-12 31-15 27-18 15-12 18-12 1-12 6-12 16-21 3-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 957.4 956.2 954.6 953.2 950.9 944.7 941.3 943.8 950.4 955.9 956.5 961.5 952.2 MAX. QFE PRESSURE IN HPA 964.4 962.6 961.3 957.6 956.1 948.8 944.3 947.0 957.2 960.1 961.9 969.3 969.3 DAY 18 4 18 6 8 18 1 8 24 24 10 7 MIN. QFE PRESSURE IN HPA 947.0 947.4 943.0 948.0 945.7 940.7 939.1 940.3 942.6 952.2 947.0 950.2 939.1 DAY 16 12 7 25 31 28 15 1 2 16 17 4 MEAN QNH PRESSURE IN HPA 1021.3 1020.0 1018.4 1016.9 1014.5 1007.9 1004.4 1007.0 1014.0 1019.8 1020.3 1025.7 1015.9 MAX. QNH PRESSURE IN HPA 1028.7 1026.8 1025.4 1021.5 1019.9 1012.3 1007.5 1010.4 1021.1 1024.2 1026.1 1033.9 1033.9 DAY 18 4 18 6 8 18 1 8 24 24 10 7 MIN. QNH PRESSURE IN HPA 1010.4 1010.8 1006.1 1011.4 1009.0 1003.7 1002.0 1003.3 1005.7 1015.8 1010.4 1013.7 1002.0 DAY 16 12 7 25 31 28 15 1 2 16 17 4 MEAN QFF PRESSURE IN HPA 1021.6 1020.5 1018.0 1014.8 1011.7 1004.1 999.9 1002.8 1010.0 1017.1 1019.7 1026.9 1013.9 MAX. QFF PRESSURE IN HPA 1029.9 1028.8 1025.8 1020.0 1018.3 1009.0 1004.0 1006.1 1017.8 1022.1 1026.4 1037.0 1037.0 DAY 28 4 18 6 8 18 1 8 24 23 10 7 MIN. QFF PRESSURE IN HPA 1009.7 1010.2 1004.6 1008.3 1004.1 999.9 997.0 998.9 1001.4 1013.1 1009.5 1014.9 997.0 DAY 16 12 7 25 31 28 15 1 2 16 17 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 957.3 956.2 954.9 953.3 951.2 945.1 941.5 944.2 950.8 956.4 956.4 961.4 952.4 MAX. QFE PRESSURE IN HPA 964.6 962.2 962.1 957.6 957.3 948.9 944.8 947.3 957.6 960.5 962.4 968.6 968.6 DAY 18 19 18 6 17 18 1 8 24 23 10 7 MIN. QFE PRESSURE IN HPA 947.0 948.4 944.3 947.6 945.6 941.2 939.1 940.9 942.8 953.0 947.0 950.2 939.1 DAY 16 12 7 30 13 28 15 1 1 6 17 3 MEAN QNH PRESSURE IN HPA 1021.2 1020.1 1018.7 1017.0 1014.8 1008.4 1004.5 1007.4 1014.4 1020.2 1020.2 1025.6 1016.0 MAX. QNH PRESSURE IN HPA 1028.9 1026.4 1026.3 1021.5 1021.2 1012.4 1008.0 1010.7 1021.5 1024.6 1026.6 1033.1 1033.1 DAY 18 19 18 6 17 18 1 8 24 23 10 7 MIN. QNH PRESSURE IN HPA 1010.4 1011.8 1007.5 1011.0 1008.9 1004.2 1002.0 1003.9 1005.9 1016.7 1010.4 1013.7 1002.0 DAY 16 12 7 30 13 28 15 1 1 6 17 3 MEAN QFF PRESSURE IN HPA 1021.8 1020.9 1018.7 1015.4 1012.2 1004.7 1000.3 1003.5 1010.8 1018.0 1019.9 1027.2 1014.4 MAX. QFF PRESSURE IN HPA 1030.5 1028.4 1027.1 1020.6 1019.7 1009.2 1004.6 1006.8 1018.6 1023.1 1027.6 1036.7 1036.7 DAY 18 4 18 6 17 18 1 8 24 23 10 7 MIN. QFF PRESSURE IN HPA 1009.8 1012.2 1006.3 1008.3 1005.0 1000.4 997.2 999.8 1002.3 1014.3 1009.5 1013.8 997.2 DAY 16 12 7 30 31 28 15 1 2 16 17 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 958.4 957.2 956.0 954.3 951.6 945.3 941.6 944.4 951.6 957.3 957.5 962.2 953.1 MAX. QFE PRESSURE IN HPA 965.6 962.4 963.2 958.2 958.1 949.4 944.8 947.6 957.9 962.2 963.5 969.0 969.0 DAY 18 19 18 11 17 18 1 8 24 23 10 7 MIN. QFE PRESSURE IN HPA 948.4 950.4 946.5 948.0 945.8 942.2 938.8 941.2 943.1 953.1 950.0 950.0 938.8 DAY 16 12 12 1 4 25 22 1 1 6 17 3 MEAN QNH PRESSURE IN HPA 1022.4 1021.2 1019.8 1018.0 1015.2 1008.6 1004.6 1007.6 1015.2 1021.2 1021.4 1026.3 1016.8 MAX. QNH PRESSURE IN HPA 1030.0 1026.6 1027.4 1022.2 1022.1 1012.9 1008.0 1011.0 1021.8 1026.4 1027.7 1033.5 1033.5 DAY 18 19 18 11 17 18 1 8 24 23 10 7 MIN. QNH PRESSURE IN HPA 1011.8 1013.9 1009.8 1011.4 1009.1 1005.3 1001.7 1004.2 1006.2 1016.8 1013.5 1013.5 1001.7 DAY 16 12 12 1 4 25 22 1 1 6 17 3 MEAN QFF PRESSURE IN HPA 1023.1 1022.1 1019.7 1016.3 1012.3 1004.4 999.8 1003.3 1011.5 1018.8 1021.0 1028.1 1015.0 MAX. QFF PRESSURE IN HPA 1031.6 1029.0 1027.9 1021.2 1020.0 1009.2 1004.0 1006.4 1018.8 1024.8 1028.6 1036.8 1036.8 DAY 18 4 18 11 17 18 1 8 24 23 10 7 MIN. QFF PRESSURE IN HPA 1011.8 1014.3 1009.2 1009.0 1004.9 1000.4 996.8 999.6 1002.3 1014.2 1013.0 1013.4 996.8 DAY 16 12 7 1 31 25 15 1 1 6 17 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 957.8 957.1 955.6 953.9 951.4 945.1 941.2 944.0 951.0 956.7 956.9 961.8 952.7 MAX. QFE PRESSURE IN HPA 964.9 962.0 961.9 958.0 958.2 949.0 943.7 947.8 957.2 961.7 963.4 967.9 967.9 DAY 18 25 18 5 17 18 1 8 24 23 1 7 MIN. QFE PRESSURE IN HPA 949.1 950.1 945.4 946.8 945.4 942.5 938.8 941.0 942.5 952.4 949.8 948.4 938.8 DAY 16 11 11 1 31 25 22 18 1 6 6 3 MEAN QNH PRESSURE IN HPA 1021.7 1021.1 1019.4 1017.7 1014.9 1008.3 1004.2 1007.2 1014.5 1020.6 1020.7 1026.0 1016.4 MAX. QNH PRESSURE IN HPA 1029.2 1026.2 1026.1 1021.9 1022.2 1012.5 1006.9 1011.2 1021.1 1025.9 1027.6 1032.4 1032.4 DAY 18 25 18 5 17 18 1 8 24 23 1 7 MIN. QNH PRESSURE IN HPA 1012.6 1013.6 1008.7 1010.1 1008.7 1005.6 1001.7 1004.0 1005.6 1016.0 1013.3 1011.8 1001.7 DAY 16 11 11 1 31 25 22 18 1 6 6 3 MEAN QFF PRESSURE IN HPA 1021.9 1021.6 1019.0 1015.7 1012.2 1004.4 999.6 1003.0 1010.6 1018.0 1020.1 1027.2 1014.4 MAX. QFF PRESSURE IN HPA 1030.2 1027.3 1026.1 1020.4 1020.6 1009.1 1003.3 1007.0 1017.6 1023.8 1027.2 1035.2 1035.2 DAY 28 4 18 11 17 18 1 8 24 23 10 7 MIN. QFF PRESSURE IN HPA 1012.8 1013.7 1008.1 1007.6 1004.3 1001.0 997.0 999.2 1001.4 1013.1 1012.2 1011.6 997.0 DAY 16 11 11 1 31 25 22 18 1 6 6 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 956.4 955.8 954.1 952.8 950.3 944.2 940.5 943.3 949.8 955.4 955.7 960.7 951.6 MAX. QFE PRESSURE IN HPA 963.4 961.2 960.3 957.5 957.0 948.4 942.4 946.4 956.3 960.0 962.4 967.7 967.7 DAY 18 3 18 16 17 17 20 8 23 23 1 6 MIN. QFE PRESSURE IN HPA 949.0 948.0 942.0 946.2 943.6 941.6 938.6 940.1 941.6 951.1 947.8 947.5 938.6 DAY 15 11 11 1 31 27 15 18 1 6 25 3 MEAN QNH PRESSURE IN HPA 1020.3 1019.6 1017.8 1016.4 1013.8 1007.4 1003.5 1006.4 1013.3 1019.2 1019.6 1024.8 1015.2 MAX. QNH PRESSURE IN HPA 1027.6 1025.3 1024.4 1021.4 1020.9 1011.8 1005.5 1009.7 1020.2 1024.1 1026.6 1032.2 1032.2 DAY 18 3 18 16 17 17 20 8 23 23 1 6 MIN. QNH PRESSURE IN HPA 1012.5 1011.4 1005.1 1009.5 1006.8 1004.7 1001.5 1003.1 1004.7 1014.7 1011.2 1010.9 1001.5 DAY 15 11 11 1 31 27 15 18 1 6 25 3 MEAN QFF PRESSURE IN HPA 1020.5 1020.1 1017.4 1014.4 1011.1 1003.7 999.0 1002.2 1009.4 1016.6 1018.9 1026.1 1013.3 MAX. QFF PRESSURE IN HPA 1028.6 1026.7 1024.4 1019.9 1019.4 1008.0 1001.7 1005.6 1016.7 1021.9 1026.2 1034.9 1034.9 DAY 27 3 18 16 17 17 20 8 23 23 10 6 MIN. QFF PRESSURE IN HPA 1011.9 1011.4 1005.0 1006.8 1001.7 1001.0 996.5 998.1 1000.3 1011.5 1010.5 1010.9 996.5 DAY 15 11 11 1 31 27 15 18 1 6 6 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 956.9 956.0 954.4 952.6 949.8 943.8 940.3 943.1 949.8 955.6 955.9 961.0 951.6 MAX. QFE PRESSURE IN HPA 964.1 961.6 960.4 957.5 957.0 948.0 942.5 945.9 957.0 960.4 962.2 968.6 968.6 DAY 27 18 17 16 17 17 20 8 23 19 9 6 MIN. QFE PRESSURE IN HPA 945.4 947.4 942.1 949.0 942.7 940.5 938.8 940.6 941.9 952.0 947.5 948.4 938.8 DAY 31 11 11 23 31 27 23 1 1 5 25 3 MEAN QNH PRESSURE IN HPA 1020.8 1019.9 1018.2 1016.3 1013.3 1007.0 1003.3 1006.2 1013.3 1019.4 1019.8 1025.1 1015.2 MAX. QNH PRESSURE IN HPA 1028.4 1025.7 1024.5 1021.4 1020.9 1011.4 1005.6 1009.2 1020.9 1024.5 1026.4 1033.1 1033.1 DAY 27 18 17 16 17 17 20 8 23 19 9 6 MIN. QNH PRESSURE IN HPA 1008.7 1010.8 1005.2 1012.5 1005.8 1003.5 1001.7 1003.6 1005.0 1015.6 1010.9 1011.8 1001.7 DAY 31 11 11 23 31 27 23 1 1 5 25 3 MEAN QFF PRESSURE IN HPA 1021.3 1020.7 1018.0 1014.6 1010.7 1003.4 999.0 1002.4 1009.7 1017.2 1019.4 1026.7 1013.6 MAX. QFF PRESSURE IN HPA 1029.9 1027.4 1025.3 1020.4 1019.4 1007.8 1002.1 1005.4 1018.0 1023.3 1027.3 1036.1 1036.1 DAY 27 3 17 16 17 17 20 8 27 19 9 6 MIN. QFF PRESSURE IN HPA 1008.7 1011.5 1005.6 1009.4 1000.8 999.9 996.7 999.1 1001.3 1013.0 1010.5 1012.1 996.7 DAY 31 11 11 24 31 27 2 18 1 15 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 957.4 956.9 955.0 953.7 951.0 944.9 941.5 944.4 951.1 956.4 956.6 961.9 952.6 MAX. QFE PRESSURE IN HPA 964.4 963.0 960.9 958.8 957.0 949.0 943.7 947.1 957.9 960.8 963.3 969.0 969.0 DAY 27 25 17 16 17 17 19 8 23 31 10 6 MIN. QFE PRESSURE IN HPA 947.2 947.3 941.4 949.2 943.9 940.9 939.8 941.7 943.4 953.1 949.2 949.6 939.8 DAY 31 11 11 26 31 27 14 1 1 5 16 3 MEAN QNH PRESSURE IN HPA 1021.3 1020.8 1018.8 1017.4 1014.5 1008.1 1004.5 1007.6 1014.7 1020.2 1020.5 1026.0 1016.2 MAX. QNH PRESSURE IN HPA 1028.7 1027.2 1025.0 1022.8 1020.9 1012.5 1006.9 1010.5 1021.8 1024.9 1027.5 1033.5 1033.5 DAY 27 25 17 16 17 17 19 8 23 31 10 6 MIN. QNH PRESSURE IN HPA 1010.6 1010.7 1004.5 1012.7 1007.1 1003.9 1002.8 1004.8 1006.6 1016.8 1012.7 1013.1 1002.8 DAY 31 11 11 26 31 27 14 1 1 5 16 3 MEAN QFF PRESSURE IN HPA 1021.9 1021.7 1018.6 1015.7 1011.6 1004.0 999.7 1003.4 1010.9 1017.9 1020.1 1027.8 1014.4 MAX. QFF PRESSURE IN HPA 1030.6 1029.0 1025.8 1021.1 1018.9 1008.3 1002.5 1006.0 1018.8 1023.4 1028.3 1036.5 1036.5 DAY 27 3 17 16 17 17 19 8 24 31 10 6 MIN. QFF PRESSURE IN HPA 1010.0 1011.2 1003.8 1010.7 1002.4 999.8 997.6 1000.3 1002.4 1014.1 1011.7 1013.3 997.6 DAY 31 11 11 22 31 27 14 1 1 15 16 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 957.3 956.8 955.0 953.9 951.3 945.2 941.8 944.5 951.1 956.4 956.5 961.9 952.7 MAX. QFE PRESSURE IN HPA 964.9 963.0 961.3 958.3 956.4 949.3 944.0 947.4 957.9 961.5 962.5 969.5 969.5 DAY 27 25 17 5 7 17 19 7 24 31 9 6 MIN. QFE PRESSURE IN HPA 948.1 947.2 943.1 949.1 943.8 941.8 939.8 942.1 943.4 952.6 947.0 950.6 939.8 DAY 15 11 11 24 31 27 21 1 1 15 16 3 MEAN QNH PRESSURE IN HPA 1021.3 1020.7 1018.8 1017.6 1014.9 1008.5 1004.8 1007.8 1014.7 1020.3 1020.4 1026.1 1016.3 MAX. QNH PRESSURE IN HPA 1029.2 1027.2 1025.4 1022.3 1020.3 1012.8 1007.2 1010.8 1021.8 1025.6 1026.7 1034.1 1034.1 DAY 27 25 17 5 7 17 19 7 24 31 9 6 MIN. QNH PRESSURE IN HPA 1011.5 1010.6 1006.2 1012.6 1007.0 1004.9 1002.8 1005.2 1006.6 1016.3 1010.4 1014.2 1002.8 DAY 15 11 11 24 31 27 21 1 1 15 16 3 MEAN QFF PRESSURE IN HPA 1021.5 1021.3 1018.3 1015.7 1012.0 1004.6 1000.2 1003.5 1010.7 1017.7 1019.8 1027.4 1014.4 MAX. QFF PRESSURE IN HPA 1030.6 1028.1 1025.9 1020.8 1018.6 1009.2 1003.0 1006.5 1018.2 1023.8 1027.2 1037.1 1037.1 DAY 27 3 17 5 7 17 19 7 24 31 9 6 MIN. QFF PRESSURE IN HPA 1010.7 1009.9 1005.3 1009.9 1002.5 1000.7 997.7 1000.9 1002.0 1013.4 1009.3 1014.6 997.7 DAY 31 11 6 24 31 27 14 10 1 15 16 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.9 9.9 12.7 16.6 24.7 29.4 31.0 30.9 26.3 20.5 12.9 7.7 19.3 MINIMUN AIR TEMPERATURE (C) 3.3 4.1 6.2 9.3 16.5 18.9 20.3 19.8 16.6 11.2 5.9 1.8 11.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 6 2 8 9 1 0 0 0 26 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 5 0 0 0 0 0 0 0 0 0 8 7 20 TEMPERATURE RECORDS LOWEST(C) -1.8 1.0 1.2 3.2 5.8 15.6 17.4 17.0 11.0 7.8 -3.4 -2.0 -3.4 DAY 23 10 28 6 9 6 3 27 21 17 27 21 MAXIMUM AIR TEMPERATURE (C) 15.6 16.4 20.0 23.8 32.9 38.3 40.6 41.9 36.7 30.5 22.0 14.7 27.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 24 30 31 31 30 18 0 0 166 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.8 20.0 25.4 31.2 38.6 43.0 43.4 44.8 44.6 37.8 29.6 18.8 44.8 DAY 8 1 31 30 24 20 4 2 1 2 1 2 DIF. BETWEEN (MAX.-MIN.) (C) 12.3 12.3 13.8 14.5 16.4 19.4 20.3 22.1 20.1 19.3 16.1 12.9 16.6 MEAN DAILY TEMP. (MDT) (C) 9.4 10.2 13.1 16.5 24.7 28.6 30.4 30.8 26.6 20.8 14.0 8.3 19.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.7 134.3 228.0 292.8 305.3 169.4 24.8 1.5 0.0 1157.8 HEATING DEG. DAYS(BASE 18 0C) 265.3 217.3 151.8 56.2 4.8 0.0 0.0 0.0 0.0 0.5 133.5 302.0 1131.3 DEWPOINT (MEAN C) 3.8 3.8 5.5 8.7 8.8 7.3 7.1 6.1 6.1 1.8 1.3 0.6 5.1 MIXING RATIO (G/KG) 5.35 5.38 6.06 7.63 7.81 7.02 6.93 6.40 6.37 4.68 4.88 4.28 6.07 VAPOUR PRESSURE (HPA) 8.19 8.21 9.22 11.55 11.78 10.56 10.38 9.61 9.62 7.14 7.43 6.56 9.19 SATURATION DEF. (HPA) 3.70 4.44 6.22 8.34 21.95 33.24 37.91 39.21 27.83 18.88 9.04 4.41 17.93 RELATIVE HUMIDITY (MEAN %) 73 70 66 65 44 30 27 25 32 33 52 66 49 RELATIVE HUMIDITY (MAX. %) 90 90 87 88 70 53 47 43 54 52 78 85 70 RELATIVE HUMIDITY (MIN. %) 45 44 38 39 23 14 11 10 14 14 22 41 26 RELATIVE HUMIDITY (MEAN% 03UTC) 86 83 84 82 61 48 46 42 50 48 72 81 65 RELATIVE HUMIDITY (MEAN% 09UTC) 54 51 44 48 30 16 13 12 17 15 29 45 31 RELATIVE HUMIDITY (MEAN% 15UTC) 65 61 51 53 31 16 13 13 20 23 41 56 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 11.7 58.2 63.9 113.1 37.4 2.6 0.0 0.0 2.0 0.0 20.4 38.5 347.8 DAYS WITH PRECIPITATION >=10 0 2 3 5 1 0 0 0 0 0 1 1 13 DAYS WITH PRECIPITATION >= 5 1 4 5 6 3 0 0 0 0 0 2 1 22 DAYS WITH PRECIPITATION >= 1 3 7 8 8 6 1 0 0 1 0 4 5 43 DAYS WITH PRECIPITATION 5 9 8 17 7 3 0 0 1 0 7 6 63 GREATEST DAILY PRECIPITATION 8.0 21.0 20.0 34.0 20.0 2.0 0.0 0.0 2.0 0.0 10.0 25.8 34.0 DAY 16 5 17 4 6 2 ** ** 20 ** 3 12 DAY WITH THUNDER STORM 1 2 3 7 6 2 0 0 2 0 2 1 26 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 0 0 2 0 0 1 1 0 0 4 WIND DIRECTION (PREVAILING) 270 135 180 135 135 270 270 270 270 270 180 360 270 PREVAILING WIND SPEED(KNOTS) 6.7 10.6 9.3 11.3 12.5 9.6 7.3 5.9 5.9 7.9 11.9 3.8 6.9 PREVAILING WIND PERCENT 2.4 6.3 4.8 8.8 21.0 8.3 16.5 12.1 14.2 6.5 4.2 3.2 6.5 CALMS PERCENT OF WIND 90.3 77.7 79.0 71.3 50.0 73.8 70.2 72.2 68.8 81.0 80.4 87.5 75.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 234 180 232 166 140 280 284 303 273 259 219 287 237 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.7 0.5 1.2 2.5 1.2 1.7 1.4 1.0 0.8 0.4 0.2 0.5 WIND STEADINESES (MEAN %) 28.6 36.8 31.3 44.4 48.1 52.2 81.0 82.4 52.6 57.1 26.7 28.6 25.0 WIND SPEED (MEAN KNOTS) 0.7 1.9 1.6 2.7 5.2 2.3 2.1 1.7 1.9 1.4 1.5 0.7 2.0 FASTEST WIND DIRECTION 150 190 180 160 130 210 330 310 30 340 200 150 190 FASTEST WIND SPEED (KNOTS) 23 31 17 21 27 25 16 14 19 16 19 14 31 DAY 16 5 25 2 23 2 15 25 15 1 8 10 DAYS WITH SKY CLEAR (0-2)/8 17 13 13 10 18 26 31 31 29 26 22 17 253 DAYS WITH P.CLOUDY (3-6)/8 10 9 12 12 11 4 0 0 1 5 5 10 79 DAYS WITH CLOUDY (7-8)/8 4 6 6 8 2 0 0 0 0 0 3 4 33 DAYS WITH VISIBILITY =< 2 KM 2 1 0 0 0 0 0 0 0 0 0 0 3 DURATION OF SUNSHINE HOURS 189.4 ****** 238.4 214.0 ****** 228.5 382.5 372.7 325.9 302.3 231.7 185.4 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 960.9 956.6 956.1 953.6 951.4 947.0 942.1 944.6 949.7 955.0 958.1 960.7 953.0 MAX. QFE PRESSURE IN HPA 966.4 963.6 962.8 960.0 957.4 952.2 946.4 950.5 954.8 963.1 965.0 965.9 966.4 DAY-HOUR 20- 6 1- 6 3- 6 6- 6 8- 6 8-21 4- 3 25- 6 21-21 25- 6 15- 6 19- 6 MIN. QFE PRESSURE IN HPA 951.6 942.0 946.9 948.0 947.1 940.6 936.1 939.4 943.4 948.4 950.9 952.9 936.1 DAY-HOUR 16-15 5- 3 16-12 18-15 2- 3 29- 0 21-15 3-15 2-12 11-15 7-12 11-12 MEAN QNH PRESSURE IN HPA 1025.0 1020.5 1019.9 1017.3 1015.0 1010.4 1005.2 1007.9 1013.2 1018.8 1022.1 1024.7 1016.7 MAX. QNH PRESSURE IN HPA 1030.8 1027.9 1027.0 1024.1 1021.3 1015.8 1009.7 1014.0 1018.6 1027.3 1029.3 1030.3 1030.8 DAY-HOUR 20- 6 1- 6 3- 6 6- 6 8- 6 8-21 4- 3 25- 6 21-21 25- 6 15- 6 19- 6 MIN. QNH PRESSURE IN HPA 1015.2 1005.1 1010.2 1011.4 1010.5 1003.6 998.9 1002.3 1006.6 1011.8 1014.5 1016.6 998.9 DAY-HOUR 16-15 5- 3 16-12 18-15 2- 3 29- 0 21-15 3-15 2-12 11-15 7-12 11-12 MEAN QFF PRESSURE IN HPA 1025.7 1021.0 1019.7 1016.2 1012.0 1006.4 1000.9 1003.6 1009.9 1016.9 1021.9 1025.8 1015.0 MAX. QFF PRESSURE IN HPA 1032.4 1028.8 1027.3 1024.1 1020.8 1012.2 1005.6 1010.1 1016.5 1026.3 1030.3 1032.4 1032.4 DAY-HOUR 20- 6 10- 6 3- 6 6- 6 8- 6 6- 3 4- 3 25- 3 21-21 25- 6 15- 6 19- 6 MIN. QFF PRESSURE IN HPA 1014.1 1004.2 1009.7 1009.1 1006.2 998.9 994.0 998.0 1002.2 1009.5 1013.3 1016.6 994.0 DAY-HOUR 16-15 5- 3 16-12 3- 0 24-12 29- 0 21- 9 3-15 2-12 11-21 7-12 11-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 961.1 956.5 955.9 953.5 951.1 947.2 942.2 944.6 949.5 954.9 957.9 960.7 952.9 MAX. QFE PRESSURE IN HPA 966.0 962.9 961.1 959.0 955.2 950.8 946.0 950.0 954.3 961.8 963.0 965.0 966.0 DAY 20 11 3 6 9 11 4 25 22 25 15 19 MIN. QFE PRESSURE IN HPA 954.4 942.7 950.0 948.4 947.8 940.6 936.6 940.8 944.0 949.3 952.1 953.4 936.6 DAY 12 5 17 3 2 29 21 15 2 12 7 12 MEAN QNH PRESSURE IN HPA 1025.2 1020.4 1019.7 1017.2 1014.7 1010.6 1005.3 1007.8 1013.0 1018.7 1021.8 1024.8 1016.6 MAX. QNH PRESSURE IN HPA 1030.4 1027.1 1025.2 1023.0 1019.0 1014.4 1009.3 1013.5 1018.0 1026.0 1027.2 1029.3 1030.4 DAY 20 11 3 6 9 11 4 25 22 25 15 19 MIN. QNH PRESSURE IN HPA 1018.2 1005.8 1013.5 1011.8 1011.2 1003.6 999.4 1003.8 1007.2 1012.8 1015.7 1017.1 999.4 DAY 12 5 17 3 2 29 21 15 2 12 7 12 MEAN QFF PRESSURE IN HPA 1025.7 1020.7 1019.4 1016.0 1011.7 1006.8 1001.0 1003.4 1009.5 1016.6 1021.3 1025.6 1014.8 MAX. QFF PRESSURE IN HPA 1031.3 1028.2 1025.0 1023.3 1018.7 1010.8 1005.0 1009.5 1016.0 1024.5 1028.1 1031.4 1031.4 DAY 20 11 3 6 9 11 4 25 22 25 26 19 MIN. QFF PRESSURE IN HPA 1017.8 1004.8 1012.3 1009.1 1006.9 998.9 994.4 999.0 1002.9 1010.3 1014.6 1016.9 994.4 DAY 12 5 25 3 24 29 22 15 2 12 7 12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 960.8 956.5 956.0 953.6 951.7 947.6 942.4 944.8 949.5 955.0 958.0 960.6 953.0 MAX. QFE PRESSURE IN HPA 965.3 962.6 961.6 959.3 956.8 951.4 946.4 950.2 954.0 962.2 963.5 964.4 965.3 DAY 20 1 3 6 9 9 4 25 22 25 15 19 MIN. QFE PRESSURE IN HPA 954.2 942.0 950.1 948.2 947.1 941.8 936.5 940.8 944.0 949.5 951.9 953.4 936.5 DAY 12 5 16 3 2 29 22 9 2 12 7 12 MEAN QNH PRESSURE IN HPA 1024.9 1020.4 1019.8 1017.4 1015.3 1010.9 1005.5 1008.1 1013.0 1018.8 1021.9 1024.7 1016.7 MAX. QNH PRESSURE IN HPA 1029.6 1026.8 1025.7 1023.3 1020.7 1015.0 1009.7 1013.7 1017.7 1026.4 1027.7 1028.7 1029.6 DAY 20 1 3 6 9 9 4 25 22 25 15 19 MIN. QNH PRESSURE IN HPA 1017.9 1005.1 1013.6 1011.6 1010.5 1004.9 999.3 1003.8 1007.2 1013.0 1015.5 1017.1 999.3 DAY 12 5 16 3 2 29 22 9 2 12 7 12 MEAN QFF PRESSURE IN HPA 1025.9 1021.1 1019.8 1016.5 1012.6 1007.2 1001.4 1004.1 1010.1 1017.2 1022.0 1026.0 1015.3 MAX. QFF PRESSURE IN HPA 1031.2 1028.2 1026.1 1023.9 1020.5 1012.2 1005.6 1010.1 1016.1 1025.5 1028.8 1030.8 1031.2 DAY 20 11 3 6 9 6 4 25 22 25 15 19 MIN. QFF PRESSURE IN HPA 1017.9 1004.2 1012.5 1009.3 1007.6 999.8 994.3 999.4 1003.3 1011.0 1014.1 1017.4 994.3 DAY 12 5 25 3 2 29 22 15 2 12 8 12 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 961.8 957.7 957.0 954.1 952.3 947.7 942.5 945.2 950.2 955.9 959.0 961.5 953.7 MAX. QFE PRESSURE IN HPA 966.4 963.6 962.8 960.0 957.4 952.1 945.8 950.5 954.1 963.1 965.0 965.9 966.4 DAY 20 1 3 6 8 3 3 25 12 25 15 19 MIN. QFE PRESSURE IN HPA 955.1 946.8 948.9 948.6 947.8 942.6 936.9 941.0 944.6 950.8 952.8 954.6 936.9 DAY 12 5 16 19 6 29 21 9 1 12 7 12 MEAN QNH PRESSURE IN HPA 1025.9 1021.6 1020.9 1017.8 1016.0 1011.1 1005.6 1008.5 1013.8 1019.8 1023.0 1025.6 1017.5 MAX. QNH PRESSURE IN HPA 1030.8 1027.9 1027.0 1024.1 1021.3 1015.7 1009.1 1014.0 1017.8 1027.3 1029.3 1030.3 1030.8 DAY 20 1 3 6 8 3 3 25 12 25 15 19 MIN. QNH PRESSURE IN HPA 1018.9 1010.1 1012.4 1012.0 1011.2 1005.7 999.7 1004.0 1007.8 1014.4 1016.5 1018.4 999.7 DAY 12 5 16 19 6 29 21 9 1 12 7 12 MEAN QFF PRESSURE IN HPA 1027.1 1022.3 1020.9 1016.7 1013.0 1007.0 1001.1 1004.1 1010.5 1018.0 1023.1 1027.1 1015.9 MAX. QFF PRESSURE IN HPA 1032.4 1028.8 1027.3 1024.1 1020.8 1012.1 1005.0 1009.6 1015.4 1026.3 1030.3 1032.4 1032.4 DAY 20 10 3 6 8 3 3 25 21 25 15 19 MIN. QFF PRESSURE IN HPA 1018.9 1010.0 1011.6 1010.4 1008.5 1001.3 994.4 999.2 1003.5 1011.9 1015.8 1018.9 994.4 DAY 12 5 16 19 6 29 21 15 2 12 7 12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 961.0 957.1 956.7 954.0 951.9 947.3 942.2 944.8 949.9 955.3 958.3 960.9 953.3 MAX. QFE PRESSURE IN HPA 965.9 963.0 962.1 959.2 956.9 952.1 945.8 948.9 953.6 961.8 964.2 965.6 965.9 DAY 19 10 3 6 9 1 3 25 12 25 15 19 MIN. QFE PRESSURE IN HPA 955.1 949.6 948.4 949.3 948.7 943.0 936.3 940.4 944.0 951.4 952.0 954.9 936.3 DAY 12 5 16 19 24 29 21 15 1 11 7 11 MEAN QNH PRESSURE IN HPA 1025.1 1021.0 1020.6 1017.7 1015.6 1010.6 1005.3 1008.0 1013.4 1019.1 1022.3 1025.0 1017.0 MAX. QNH PRESSURE IN HPA 1030.3 1027.2 1026.3 1023.2 1020.8 1015.7 1009.1 1012.4 1017.3 1026.0 1028.5 1030.0 1030.3 DAY 19 10 3 6 9 1 3 25 12 25 15 19 MIN. QNH PRESSURE IN HPA 1018.9 1013.1 1011.8 1012.8 1012.1 1006.1 999.1 1003.4 1007.2 1015.0 1015.6 1018.7 999.1 DAY 12 5 16 19 24 29 21 15 1 11 7 11 MEAN QFF PRESSURE IN HPA 1025.7 1021.3 1020.2 1016.5 1012.6 1006.7 1001.0 1003.7 1010.0 1017.0 1021.8 1025.8 1015.2 MAX. QFF PRESSURE IN HPA 1031.3 1028.2 1026.1 1023.3 1020.3 1012.1 1005.1 1008.4 1015.3 1024.3 1028.7 1031.5 1031.5 DAY 19 10 3 6 8 1 3 25 21 25 15 19 MIN. QFF PRESSURE IN HPA 1018.4 1012.7 1011.1 1010.8 1007.3 1001.6 994.0 998.5 1002.5 1012.3 1014.3 1018.7 994.0 DAY 12 5 16 19 24 28 21 15 1 11 7 11 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 959.9 955.7 955.4 953.1 950.8 946.3 941.6 943.9 948.9 954.1 957.2 959.6 952.2 MAX. QFE PRESSURE IN HPA 964.6 961.9 960.6 958.4 956.0 951.2 944.5 947.8 952.9 959.8 963.3 964.2 964.6 DAY 19 10 3 6 7 1 3 24 21 25 15 19 MIN. QFE PRESSURE IN HPA 952.8 949.5 946.9 948.2 947.3 942.4 936.3 940.0 943.4 949.7 950.9 952.9 936.3 DAY 16 4 16 18 6 28 21 3 2 10 7 11 MEAN QNH PRESSURE IN HPA 1023.9 1019.5 1019.2 1016.8 1014.3 1009.7 1004.6 1007.1 1012.3 1017.8 1021.2 1023.7 1015.8 MAX. QNH PRESSURE IN HPA 1028.9 1026.1 1024.7 1022.4 1019.8 1014.8 1007.7 1011.2 1016.6 1023.8 1027.5 1028.5 1028.9 DAY 19 10 3 6 7 1 3 24 21 25 15 19 MIN. QNH PRESSURE IN HPA 1016.5 1013.0 1010.2 1011.6 1010.7 1005.5 999.1 1003.0 1006.6 1013.2 1014.5 1016.6 999.1 DAY 16 4 16 18 6 28 21 3 2 10 7 11 MEAN QFF PRESSURE IN HPA 1024.4 1019.7 1018.8 1015.6 1011.4 1005.9 1000.4 1002.8 1009.0 1015.7 1020.7 1024.5 1014.1 MAX. QFF PRESSURE IN HPA 1029.9 1027.2 1024.4 1022.4 1018.5 1011.2 1003.9 1007.2 1014.6 1022.2 1027.6 1029.9 1029.9 DAY 19 10 3 6 9 1 3 25 21 24 15 19 MIN. QFF PRESSURE IN HPA 1016.3 1012.4 1009.7 1010.4 1006.2 1001.1 994.3 998.3 1002.2 1010.3 1013.3 1016.6 994.3 DAY 16 15 16 18 24 28 21 3 2 10 7 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 960.2 956.0 955.5 953.0 950.2 945.9 941.2 943.8 949.0 954.3 957.8 960.2 952.3 MAX. QFE PRESSURE IN HPA 965.0 962.1 960.4 958.4 956.2 950.3 945.0 947.8 953.2 960.3 963.3 964.9 965.0 DAY 19 10 3 5 7 5 3 25 21 24 15 19 MIN. QFE PRESSURE IN HPA 951.6 948.0 947.8 948.0 947.4 942.0 936.1 939.4 944.2 948.4 951.8 954.0 936.1 DAY 16 4 16 18 24 28 21 3 2 11 23 11 MEAN QNH PRESSURE IN HPA 1024.3 1019.9 1019.3 1016.7 1013.8 1009.2 1004.3 1007.0 1012.5 1018.1 1021.8 1024.3 1015.9 MAX. QNH PRESSURE IN HPA 1029.3 1026.3 1024.5 1022.4 1020.1 1013.8 1008.2 1011.2 1016.9 1024.4 1027.5 1029.2 1029.3 DAY 19 10 3 5 7 5 3 25 21 24 15 19 MIN. QNH PRESSURE IN HPA 1015.2 1011.4 1011.2 1011.4 1010.8 1005.1 998.9 1002.3 1007.4 1011.8 1015.4 1017.7 998.9 DAY 16 4 16 18 24 28 21 3 2 11 23 11 MEAN QFF PRESSURE IN HPA 1025.2 1020.5 1019.2 1015.7 1011.0 1005.5 1000.2 1003.0 1009.6 1016.5 1021.9 1025.6 1014.5 MAX. QFF PRESSURE IN HPA 1030.8 1027.8 1024.5 1022.6 1018.8 1011.4 1004.5 1007.6 1015.3 1023.2 1028.9 1030.9 1030.9 DAY 19 10 3 5 7 5 3 25 21 24 26 19 MIN. QFF PRESSURE IN HPA 1014.1 1011.1 1010.7 1010.4 1006.5 1000.8 994.1 998.0 1003.6 1009.8 1014.2 1018.0 994.1 DAY 16 4 16 18 24 24 21 3 2 11 23 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 961.1 956.9 956.3 953.8 951.2 946.9 942.4 945.0 950.2 955.3 958.5 961.0 953.2 MAX. QFE PRESSURE IN HPA 966.0 962.8 961.4 959.4 957.2 951.4 945.8 949.8 954.4 961.8 963.6 965.4 966.0 DAY 19 10 3 5 7 3 3 25 21 24 14 19 MIN. QFE PRESSURE IN HPA 954.6 944.0 949.0 948.5 947.9 942.7 936.9 941.1 945.0 948.8 953.6 954.0 936.9 DAY 16 4 16 18 1 28 21 3 1 11 7 11 MEAN QNH PRESSURE IN HPA 1025.2 1020.8 1020.1 1017.5 1014.8 1010.2 1005.5 1008.3 1013.7 1019.1 1022.5 1025.1 1016.9 MAX. QNH PRESSURE IN HPA 1030.4 1027.0 1025.5 1023.4 1021.1 1015.0 1009.1 1013.3 1018.2 1026.0 1027.9 1029.7 1030.4 DAY 19 10 3 5 7 3 3 25 21 24 14 19 MIN. QNH PRESSURE IN HPA 1018.4 1007.2 1012.5 1011.9 1011.3 1005.8 999.7 1004.1 1008.2 1012.3 1017.3 1017.7 999.7 DAY 16 4 16 18 1 28 21 3 1 11 7 11 MEAN QFF PRESSURE IN HPA 1026.3 1021.5 1020.1 1016.3 1011.8 1006.1 1001.0 1004.0 1010.5 1017.4 1022.6 1026.5 1015.3 MAX. QFF PRESSURE IN HPA 1031.9 1028.3 1025.8 1023.4 1019.8 1012.0 1004.8 1008.9 1016.4 1024.9 1029.2 1031.8 1031.9 DAY 19 10 3 5 7 3 3 25 21 24 14 19 MIN. QFF PRESSURE IN HPA 1018.0 1006.6 1011.3 1010.2 1007.5 1001.4 994.6 999.6 1003.9 1009.6 1015.6 1017.7 994.6 DAY 16 4 16 18 24 28 21 3 1 11 2 11 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 961.2 956.8 956.2 953.9 951.7 947.3 942.6 945.1 950.2 955.3 958.5 961.0 953.3 MAX. QFE PRESSURE IN HPA 966.0 963.1 961.2 959.1 956.4 952.2 946.3 950.1 954.8 961.8 963.9 965.6 966.0 DAY 19 10 3 5 7 8 3 25 21 24 14 19 MIN. QFE PRESSURE IN HPA 953.8 944.7 948.4 948.7 948.2 942.2 936.9 941.1 944.8 948.8 953.4 953.6 936.9 DAY 11 4 16 18 23 28 21 3 1 11 6 11 MEAN QNH PRESSURE IN HPA 1025.3 1020.6 1020.1 1017.6 1015.4 1010.6 1005.7 1008.3 1013.7 1019.1 1022.5 1025.1 1017.0 MAX. QNH PRESSURE IN HPA 1030.4 1027.3 1025.3 1023.1 1020.3 1015.8 1009.6 1013.6 1018.6 1026.0 1028.2 1030.0 1030.4 DAY 19 10 3 5 7 8 3 25 21 24 14 19 MIN. QNH PRESSURE IN HPA 1017.5 1007.9 1011.8 1012.1 1011.6 1005.3 999.7 1004.1 1008.0 1012.3 1017.1 1017.3 999.7 DAY 11 4 16 18 23 28 21 3 1 11 6 11 MEAN QFF PRESSURE IN HPA 1025.8 1020.9 1019.7 1016.3 1012.3 1006.6 1001.3 1003.9 1010.3 1016.9 1022.0 1025.8 1015.2 MAX. QFF PRESSURE IN HPA 1031.3 1028.1 1025.1 1023.3 1020.2 1012.0 1005.4 1009.5 1016.5 1024.3 1028.8 1031.5 1031.5 DAY 22 10 2 5 8 8 3 25 21 24 14 19 MIN. QFF PRESSURE IN HPA 1016.9 1006.6 1010.5 1009.7 1007.0 1000.5 994.4 999.5 1003.1 1009.5 1015.3 1017.0 994.4 DAY 11 4 16 18 23 28 21 3 1 11 2 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.9 10.9 11.7 16.8 25.3 29.7 34.8 32.1 27.1 21.3 15.1 12.1 20.5 MINIMUN AIR TEMPERATURE (C) 5.0 5.6 6.4 9.6 15.8 18.7 25.0 21.0 17.3 12.8 8.3 7.3 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 7 26 13 5 1 0 0 53 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 4 1 0 0 0 0 0 0 0 0 0 0 5 TEMPERATURE RECORDS LOWEST(C) -0.2 -0.6 2.6 5.0 9.4 11.4 20.2 17.0 13.4 5.0 4.8 2.4 -0.6 DAY 21 6 5 26 2 7 7 27 23 31 5 19 MAXIMUM AIR TEMPERATURE (C) 13.9 16.9 17.8 24.1 34.3 38.8 43.6 42.1 36.9 30.4 22.9 18.2 28.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 29 30 31 31 30 20 0 0 173 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.8 24.8 25.2 31.4 39.6 42.4 46.6 45.6 42.0 37.8 29.2 24.8 46.6 DAY 31 9 30 30 27 17 26 3 2 2 5 28 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 11.3 11.4 14.5 18.5 20.1 18.6 21.1 19.6 17.6 14.6 10.9 15.6 MEAN DAILY TEMP. (MDT) (C) 9.4 11.3 12.1 16.9 25.0 28.8 34.3 31.5 27.1 21.6 15.6 12.8 20.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 3.8 124.6 232.6 411.6 326.9 183.0 50.7 0.0 0.0 1333.4 HEATING DEG. DAYS(BASE 18 0C) 265.4 195.6 183.8 52.7 0.0 0.0 0.0 0.0 0.0 9.3 73.2 163.4 943.3 DEWPOINT (MEAN C) 2.3 4.9 6.0 8.1 8.2 4.7 5.7 5.9 5.3 3.9 1.7 5.3 5.2 MIXING RATIO (G/KG) 4.95 5.84 6.26 7.26 7.40 5.84 6.32 6.31 6.03 5.45 4.97 5.99 6.05 VAPOUR PRESSURE (HPA) 7.55 8.87 9.49 10.99 11.17 8.79 9.49 9.50 9.11 8.29 7.60 9.15 9.17 SATURATION DEF. (HPA) 4.16 4.72 4.74 9.14 23.43 36.30 49.53 42.06 29.52 18.98 10.42 5.55 19.88 RELATIVE HUMIDITY (MEAN %) 67 70 71 60 40 24 19 22 29 36 48 68 46 RELATIVE HUMIDITY (MAX. %) 84 90 89 85 67 43 35 38 47 55 67 86 66 RELATIVE HUMIDITY (MIN. %) 46 46 48 35 18 11 10 10 13 18 27 45 27 RELATIVE HUMIDITY (MEAN% 03UTC) 77 84 82 79 60 38 28 35 45 50 62 78 60 RELATIVE HUMIDITY (MEAN% 09UTC) 52 55 54 41 22 13 11 11 14 20 31 52 31 RELATIVE HUMIDITY (MEAN% 15UTC) 63 61 64 48 25 13 12 13 17 29 40 65 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 111.4 39.1 126.6 46.4 9.4 0.0 0.0 0.0 0.0 0.7 5.1 56.4 395.1 DAYS WITH PRECIPITATION >=10 4 1 7 1 0 0 0 0 0 0 0 2 15 DAYS WITH PRECIPITATION >= 5 6 3 7 3 1 0 0 0 0 0 0 2 22 DAYS WITH PRECIPITATION >= 1 10 8 11 7 2 0 0 0 0 0 1 9 48 DAYS WITH PRECIPITATION 13 16 19 10 6 0 0 0 1 5 4 13 87 GREATEST DAILY PRECIPITATION 29.0 15.0 21.0 26.8 5.0 0.0 0.0 0.0 0.0 0.6 4.3 24.0 29.0 DAY 6 21 2 13 12 ** ** ** ** 30 19 29 DAY WITH THUNDER STORM 6 1 4 6 4 0 1 0 1 2 0 2 27 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH DUST 0 1 2 0 0 0 0 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 135 270 180 180 135 270 135 360 270 270 135 180 135 PREVAILING WIND SPEED(KNOTS) 11.5 7.2 9.6 11.6 9.1 7.0 13.2 7.5 6.8 7.1 14.6 12.8 11.6 PREVAILING WIND PERCENT 16.9 5.2 8.1 11.3 10.5 11.3 14.1 8.9 10.4 6.0 8.8 6.0 7.2 CALMS PERCENT OF WIND 62.9 77.6 72.6 69.2 72.2 65.0 56.9 69.4 76.7 78.6 79.6 84.3 72.0 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 142 204 179 174 173 266 154 318 300 207 141 174 183 VECTOR WIND MAGNITUDE(KNOTS) 2.0 0.7 1.3 1.5 0.6 0.9 1.5 1.2 1.1 1.3 1.2 1.1 0.7 WIND STEADINESES (MEAN %) 58.8 35.0 54.2 50.0 23.1 28.1 35.7 46.2 68.7 59.1 54.5 68.7 26.9 WIND SPEED (MEAN KNOTS) 3.4 2.0 2.4 3.0 2.6 3.2 4.2 2.6 1.6 2.2 2.2 1.6 2.6 FASTEST WIND DIRECTION 140 170 130 180 160 130 140 140 180 190 210 180 180 FASTEST WIND SPEED (KNOTS) 23 25 23 33 27 27 23 17 43 27 37 25 43 DAY 12 9 7 12 11 27 16 3 21 13 6 29 DAYS WITH SKY CLEAR (0-2)/8 9 9 6 13 18 28 25 31 29 22 20 8 218 DAYS WITH P.CLOUDY (3-6)/8 11 12 15 10 10 2 6 0 1 8 4 14 93 DAYS WITH CLOUDY (7-8)/8 11 8 10 7 3 0 0 0 0 1 6 9 55 DAYS WITH VISIBILITY =< 2 KM 2 0 1 0 0 0 0 0 0 0 1 1 5 DURATION OF SUNSHINE HOURS 139.9 170.3 183.5 244.7 303.0 378.0 361.8 368.3 323.5 278.2 218.1 142.8 3112.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 957.4 955.1 952.8 953.3 950.7 946.2 943.4 945.3 949.7 954.9 959.2 959.9 952.3 MAX. QFE PRESSURE IN HPA 965.6 960.9 961.6 958.4 956.4 951.4 951.0 949.8 956.4 960.7 966.2 963.7 966.2 DAY-HOUR 25-18 19-21 28-21 25-21 18- 3 7- 9 3-18 29- 6 25- 6 18- 6 16- 6 18- 6 MIN. QFE PRESSURE IN HPA 945.8 947.8 942.6 942.7 944.9 940.8 936.7 938.8 943.1 949.0 952.9 953.1 936.7 DAY-HOUR 12- 3 10-12 7- 9 12-15 28-15 26-15 6-15 3-15 21-21 5-12 6-12 29- 9 MEAN QNH PRESSURE IN HPA 1021.3 1018.9 1016.5 1017.0 1014.2 1009.5 1006.6 1008.6 1013.2 1018.7 1023.2 1023.9 1016.0 MAX. QNH PRESSURE IN HPA 1030.0 1025.0 1025.7 1022.4 1020.3 1015.0 1014.6 1013.3 1020.3 1024.8 1030.6 1028.0 1030.6 DAY-HOUR 25-18 19-21 28-21 25-21 18- 3 7- 9 3-18 29- 6 25- 6 18- 6 16- 6 18- 6 MIN. QNH PRESSURE IN HPA 1009.1 1011.2 1005.7 1005.8 1008.1 1003.8 999.5 1001.7 1006.2 1012.5 1016.6 1016.8 999.5 DAY-HOUR 12- 3 10-12 7- 9 12-15 28-15 26-15 6-15 3-15 21-21 5-12 6-12 29- 9 MEAN QFF PRESSURE IN HPA 1022.1 1019.1 1016.4 1015.8 1011.2 1005.6 1001.6 1004.1 1009.8 1016.6 1022.5 1023.9 1014.0 MAX. QFF PRESSURE IN HPA 1031.9 1025.5 1026.8 1022.0 1016.7 1012.3 1010.0 1009.2 1017.5 1024.3 1030.0 1029.1 1031.9 DAY-HOUR 25-18 6- 6 29- 3 26- 9 18- 3 7- 9 3-21 23- 6 25- 6 31- 3 16- 6 18- 6 MIN. QFF PRESSURE IN HPA 1009.3 1009.7 1005.0 1003.9 1003.8 998.9 995.3 997.4 1002.1 1010.0 1014.8 1015.4 995.3 DAY-HOUR 12- 3 9- 3 18-12 12-18 28-12 26-12 6-15 4- 0 21-21 5-12 6-12 29- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 957.3 955.2 952.8 953.1 950.7 946.3 943.5 945.2 949.6 955.0 959.1 959.8 952.3 MAX. QFE PRESSURE IN HPA 965.5 960.3 961.6 957.9 956.0 949.9 950.7 948.6 954.8 960.0 965.3 963.2 965.5 DAY 26 13 29 26 18 7 4 29 26 31 16 18 MIN. QFE PRESSURE IN HPA 946.2 947.9 945.7 943.6 947.0 942.3 938.0 940.3 944.6 949.7 953.3 954.0 938.0 DAY 12 2 13 13 29 26 7 4 22 5 7 29 MEAN QNH PRESSURE IN HPA 1021.3 1019.0 1016.5 1016.8 1014.2 1009.6 1006.7 1008.4 1013.1 1018.7 1023.1 1023.9 1015.9 MAX. QNH PRESSURE IN HPA 1029.9 1024.4 1025.7 1021.8 1019.8 1013.4 1014.3 1012.0 1018.6 1024.1 1029.6 1027.4 1029.9 DAY 26 13 29 26 18 7 4 29 26 31 16 18 MIN. QNH PRESSURE IN HPA 1009.5 1011.3 1009.0 1006.8 1010.4 1005.4 1000.9 1003.3 1007.8 1013.2 1017.0 1017.7 1000.9 DAY 12 2 13 13 29 26 7 4 22 5 7 29 MEAN QFF PRESSURE IN HPA 1021.8 1019.0 1016.4 1015.6 1011.1 1005.7 1001.7 1003.9 1009.5 1016.4 1022.1 1023.6 1013.9 MAX. QFF PRESSURE IN HPA 1031.0 1024.8 1026.5 1021.5 1016.2 1011.3 1009.9 1007.5 1015.0 1023.6 1028.9 1028.1 1031.0 DAY 26 13 29 26 18 7 4 27 26 31 16 18 MIN. QFF PRESSURE IN HPA 1009.4 1010.2 1008.9 1005.3 1005.9 1000.2 996.3 997.4 1003.8 1010.6 1015.9 1015.7 996.3 DAY 12 2 13 13 28 26 7 4 22 5 7 29 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 957.3 955.0 952.8 953.4 951.0 946.6 943.9 945.6 949.8 955.0 958.8 959.9 952.4 MAX. QFE PRESSURE IN HPA 964.9 960.0 961.6 957.7 956.4 951.0 950.3 948.8 954.9 960.0 963.6 963.2 964.9 DAY 26 24 29 26 18 7 4 23 26 31 18 18 MIN. QFE PRESSURE IN HPA 945.8 948.2 945.2 947.0 947.3 942.9 939.2 940.5 945.6 949.7 954.0 953.3 939.2 DAY 12 9 7 12 28 26 7 14 22 5 7 29 MEAN QNH PRESSURE IN HPA 1021.2 1018.8 1016.4 1017.1 1014.6 1009.9 1007.1 1008.8 1013.3 1018.8 1022.8 1023.9 1016.1 MAX. QNH PRESSURE IN HPA 1029.2 1024.1 1025.7 1021.6 1020.3 1014.6 1013.8 1012.3 1018.7 1024.1 1027.9 1027.4 1029.2 DAY 26 24 29 26 18 7 4 23 26 31 18 18 MIN. QNH PRESSURE IN HPA 1009.1 1011.6 1008.5 1010.4 1010.7 1006.0 1002.1 1003.5 1008.9 1013.2 1017.7 1017.0 1002.1 DAY 12 9 7 12 28 26 7 14 22 5 7 29 MEAN QFF PRESSURE IN HPA 1022.1 1019.2 1016.4 1016.1 1011.7 1006.1 1002.2 1004.6 1010.2 1017.0 1022.4 1024.1 1014.4 MAX. QFF PRESSURE IN HPA 1030.8 1024.8 1026.8 1021.7 1016.7 1012.2 1009.5 1008.6 1015.9 1024.3 1026.6 1028.4 1030.8 DAY 26 13 29 26 18 7 4 23 25 31 17 18 MIN. QFF PRESSURE IN HPA 1009.3 1009.7 1007.8 1008.9 1006.3 1001.1 997.8 998.5 1005.8 1011.0 1016.9 1015.6 997.8 DAY 12 9 7 13 28 26 7 4 22 5 7 29 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 958.3 955.9 953.4 953.9 951.4 946.9 944.3 946.0 950.5 955.8 960.0 960.8 953.1 MAX. QFE PRESSURE IN HPA 965.2 960.2 961.6 958.4 956.2 951.3 950.4 949.8 956.4 960.7 966.2 963.7 966.2 DAY 25 13 29 26 18 7 3 29 25 18 16 18 MIN. QFE PRESSURE IN HPA 946.8 950.4 944.1 946.2 946.4 943.3 939.0 940.4 946.6 949.7 955.2 954.3 939.0 DAY 12 9 7 12 28 26 6 14 8 5 6 29 MEAN QNH PRESSURE IN HPA 1022.3 1019.8 1017.2 1017.6 1015.0 1010.2 1007.5 1009.3 1014.0 1019.6 1024.0 1024.9 1016.8 MAX. QNH PRESSURE IN HPA 1029.5 1024.3 1025.7 1022.4 1020.1 1014.9 1013.9 1013.3 1020.3 1024.8 1030.6 1028.0 1030.6 DAY 25 13 29 26 18 7 3 29 25 18 16 18 MIN. QNH PRESSURE IN HPA 1010.1 1013.9 1007.3 1009.5 1009.7 1006.5 1001.9 1003.4 1009.9 1013.2 1019.0 1018.0 1001.9 DAY 12 9 7 12 28 26 6 14 8 5 6 29 MEAN QFF PRESSURE IN HPA 1023.3 1020.2 1017.3 1016.4 1011.9 1006.0 1002.5 1004.8 1010.5 1017.7 1023.6 1025.1 1014.9 MAX. QFF PRESSURE IN HPA 1031.5 1025.5 1026.2 1021.8 1016.6 1012.0 1009.5 1009.2 1017.5 1023.9 1030.0 1029.1 1031.5 DAY 25 6 29 26 18 7 3 23 25 31 16 18 MIN. QFF PRESSURE IN HPA 1010.6 1012.2 1006.7 1007.9 1006.1 1001.7 997.3 998.5 1006.3 1010.9 1018.1 1016.4 997.3 DAY 12 9 7 12 28 26 6 14 8 5 6 29 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 957.9 955.5 953.2 953.8 951.2 946.6 944.0 945.7 950.0 955.1 959.5 960.2 952.7 MAX. QFE PRESSURE IN HPA 965.3 959.9 961.0 958.4 956.0 951.4 950.6 949.3 955.1 959.4 965.1 963.5 965.3 DAY 25 24 29 26 18 7 3 27 25 18 16 11 MIN. QFE PRESSURE IN HPA 947.3 949.7 942.6 947.0 946.1 942.6 938.2 940.1 946.4 949.6 954.9 953.1 938.2 DAY 12 9 7 12 28 26 6 14 8 5 6 29 MEAN QNH PRESSURE IN HPA 1021.8 1019.4 1016.9 1017.5 1014.8 1009.9 1007.2 1008.9 1013.5 1018.9 1023.5 1024.3 1016.4 MAX. QNH PRESSURE IN HPA 1029.6 1024.0 1025.1 1022.4 1019.8 1015.0 1014.2 1012.8 1018.9 1023.4 1029.4 1027.7 1029.6 DAY 25 24 29 26 18 7 3 27 25 18 16 11 MIN. QNH PRESSURE IN HPA 1010.7 1013.2 1005.7 1010.4 1009.4 1005.7 1001.1 1003.1 1009.7 1013.1 1018.7 1016.8 1001.1 DAY 12 9 7 12 28 26 6 14 8 5 6 29 MEAN QFF PRESSURE IN HPA 1022.4 1019.4 1016.7 1016.2 1011.6 1006.0 1002.1 1004.4 1009.9 1016.5 1022.5 1024.1 1014.3 MAX. QFF PRESSURE IN HPA 1030.8 1024.5 1025.2 1022.0 1016.3 1012.3 1009.7 1008.6 1015.6 1022.3 1028.4 1028.0 1030.8 DAY 25 6 29 26 17 7 3 27 25 31 16 11 MIN. QFF PRESSURE IN HPA 1011.2 1011.1 1005.2 1009.3 1004.5 1001.1 996.6 998.0 1005.9 1010.2 1017.2 1015.4 996.6 DAY 12 9 7 12 28 26 6 14 8 5 6 29 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 956.5 954.0 952.0 952.8 950.2 945.7 942.8 944.7 948.9 953.9 958.4 958.9 951.6 MAX. QFE PRESSURE IN HPA 964.4 958.2 960.7 957.5 955.4 950.6 949.9 948.2 954.1 958.3 964.0 962.0 964.4 DAY 25 24 29 26 18 7 3 22 25 18 15 11 MIN. QFE PRESSURE IN HPA 947.3 947.8 942.8 945.0 945.1 941.1 937.4 939.8 945.0 949.0 952.9 953.9 937.4 DAY 12 10 7 12 28 26 6 3 21 5 6 29 MEAN QNH PRESSURE IN HPA 1020.4 1017.8 1015.6 1016.5 1013.7 1009.0 1005.9 1008.0 1012.4 1017.6 1022.4 1022.9 1015.2 MAX. QNH PRESSURE IN HPA 1028.7 1022.2 1024.8 1021.4 1019.2 1014.2 1013.4 1011.6 1017.8 1022.3 1028.3 1026.2 1028.7 DAY 25 24 29 26 18 7 3 22 25 18 15 11 MIN. QNH PRESSURE IN HPA 1010.7 1011.2 1005.9 1008.2 1008.4 1004.1 1000.2 1002.8 1008.2 1012.5 1016.6 1017.6 1000.2 DAY 12 10 7 12 28 26 6 3 21 5 6 29 MEAN QFF PRESSURE IN HPA 1020.9 1017.8 1015.5 1015.2 1010.7 1005.2 1000.9 1003.5 1008.9 1015.3 1021.4 1022.7 1013.2 MAX. QFF PRESSURE IN HPA 1029.7 1022.3 1024.9 1021.1 1016.3 1011.6 1009.1 1007.7 1014.7 1020.4 1027.6 1026.6 1029.7 DAY 25 12 29 26 18 7 3 27 25 18 15 11 MIN. QFF PRESSURE IN HPA 1011.3 1010.1 1005.0 1007.4 1003.8 998.9 995.7 997.9 1004.9 1010.0 1014.8 1016.7 995.7 DAY 12 9 18 12 28 26 6 3 3 5 6 29 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 956.9 954.6 952.2 952.4 949.8 945.1 942.1 944.3 948.8 954.2 958.8 959.4 951.6 MAX. QFE PRESSURE IN HPA 965.1 959.1 960.2 956.7 955.4 949.8 949.0 948.2 954.8 958.4 964.8 962.1 965.1 DAY 25 19 28 26 18 7 3 22 25 18 15 30 MIN. QFE PRESSURE IN HPA 948.9 948.4 943.7 942.7 944.9 940.8 936.7 938.8 944.8 949.3 953.0 954.0 936.7 DAY 12 10 18 12 28 26 6 3 21 5 6 13 MEAN QNH PRESSURE IN HPA 1020.8 1018.3 1015.9 1016.1 1013.3 1008.4 1005.2 1007.5 1012.3 1017.9 1022.8 1023.4 1015.2 MAX. QNH PRESSURE IN HPA 1029.4 1023.1 1024.3 1020.6 1019.2 1013.3 1012.5 1011.6 1018.6 1022.4 1029.1 1026.3 1029.4 DAY 25 19 28 26 18 7 3 22 25 18 15 30 MIN. QNH PRESSURE IN HPA 1012.4 1011.8 1006.9 1005.8 1008.1 1003.8 999.5 1001.7 1008.0 1012.8 1016.7 1017.7 999.5 DAY 12 10 18 12 28 26 6 3 21 5 6 13 MEAN QFF PRESSURE IN HPA 1021.7 1018.7 1015.8 1015.1 1010.4 1004.6 1000.3 1003.3 1009.2 1016.2 1022.4 1023.6 1013.4 MAX. QFF PRESSURE IN HPA 1030.9 1023.3 1025.0 1020.3 1015.9 1010.4 1008.3 1007.8 1015.9 1021.3 1029.0 1026.9 1030.9 DAY 25 12 28 26 18 7 3 22 25 18 15 18 MIN. QFF PRESSURE IN HPA 1013.1 1011.3 1006.1 1004.7 1004.2 999.2 995.3 997.4 1004.7 1010.8 1015.5 1018.5 995.3 DAY 12 10 18 12 28 26 6 3 3 5 6 13 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 957.5 955.4 953.0 953.3 950.5 946.1 943.2 945.5 949.9 955.2 959.5 960.1 952.4 MAX. QFE PRESSURE IN HPA 965.6 960.8 961.2 957.8 955.6 949.8 951.0 948.6 955.5 959.8 965.4 963.4 965.6 DAY 25 19 28 25 18 6 3 22 30 30 15 18 MIN. QFE PRESSURE IN HPA 949.9 948.4 945.0 943.1 945.9 942.1 938.1 940.5 943.7 950.1 953.9 953.6 938.1 DAY 11 1 12 12 28 25 6 3 21 5 6 13 MEAN QNH PRESSURE IN HPA 1021.5 1019.2 1016.7 1017.0 1014.0 1009.4 1006.4 1008.8 1013.4 1019.0 1023.5 1024.2 1016.1 MAX. QNH PRESSURE IN HPA 1030.0 1024.9 1025.3 1021.7 1019.4 1013.3 1014.6 1012.0 1019.3 1023.8 1029.7 1027.6 1030.0 DAY 25 19 28 25 18 6 3 22 30 30 15 18 MIN. QNH PRESSURE IN HPA 1013.4 1011.8 1008.2 1006.2 1009.2 1005.2 1001.0 1003.5 1006.9 1013.6 1017.6 1017.3 1001.0 DAY 11 1 12 12 28 25 6 3 21 5 6 13 MEAN QFF PRESSURE IN HPA 1022.4 1019.6 1016.7 1015.7 1010.9 1005.2 1001.3 1004.2 1010.1 1017.1 1023.1 1024.4 1014.2 MAX. QFF PRESSURE IN HPA 1031.9 1025.0 1026.0 1021.1 1016.1 1010.6 1009.8 1008.1 1016.8 1023.1 1029.1 1028.8 1031.9 DAY 25 12 28 25 18 6 3 22 30 30 15 18 MIN. QFF PRESSURE IN HPA 1013.5 1011.3 1008.2 1003.9 1005.1 1000.4 996.5 998.2 1003.5 1011.4 1016.3 1017.3 996.5 DAY 5 1 12 12 28 25 6 3 21 4 6 13 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 957.6 955.5 953.1 953.6 951.0 946.5 943.7 945.8 950.0 955.4 959.5 960.1 952.6 MAX. QFE PRESSURE IN HPA 965.6 960.9 961.6 958.4 956.0 950.1 951.0 949.0 956.1 960.0 965.3 963.2 965.6 DAY 25 19 28 25 17 7 3 22 30 30 15 17 MIN. QFE PRESSURE IN HPA 948.6 948.4 945.0 944.3 947.1 942.3 938.7 940.5 943.1 950.1 953.2 953.6 938.7 DAY 11 1 12 12 28 25 6 3 21 4 6 13 MEAN QNH PRESSURE IN HPA 1021.5 1019.4 1016.7 1017.3 1014.5 1009.8 1006.9 1009.1 1013.6 1019.2 1023.5 1024.1 1016.3 MAX. QNH PRESSURE IN HPA 1030.0 1025.0 1025.7 1022.4 1019.8 1013.6 1014.6 1012.5 1019.9 1024.1 1029.6 1027.4 1030.0 DAY 25 19 28 25 17 7 3 22 30 30 15 17 MIN. QNH PRESSURE IN HPA 1012.0 1011.8 1008.2 1007.5 1010.5 1005.4 1001.6 1003.5 1006.2 1013.6 1016.9 1017.3 1001.6 DAY 11 1 12 12 28 25 6 3 21 4 6 13 MEAN QFF PRESSURE IN HPA 1022.1 1019.4 1016.5 1016.0 1011.4 1005.9 1001.8 1004.6 1010.0 1016.8 1022.5 1023.9 1014.2 MAX. QFF PRESSURE IN HPA 1031.1 1024.9 1026.3 1021.9 1015.8 1011.1 1010.0 1008.3 1017.1 1023.2 1028.6 1027.9 1031.1 DAY 25 12 28 25 17 6 3 22 30 30 15 17 MIN. QFF PRESSURE IN HPA 1011.9 1011.0 1008.0 1005.4 1006.6 1000.7 996.8 998.3 1002.1 1010.6 1015.8 1016.7 996.8 DAY 11 1 12 12 28 3 25 3 21 4 6 13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.5 6.3 9.9 16.0 24.7 30.1 31.4 30.2 26.3 21.4 14.3 9.1 19.0 MINIMUN AIR TEMPERATURE (C) 3.4 -0.1 4.3 8.9 15.4 19.5 20.4 19.6 16.3 13.8 9.5 5.0 11.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 13 9 6 0 0 0 0 28 DAYS WITH MINIMUM TEMP. <=-4 1 5 0 0 0 0 0 0 0 0 0 0 6 DAYS WITH FREEZING MIN.<= 0 2 15 5 1 0 0 0 0 0 0 0 1 24 TEMPERATURE RECORDS LOWEST(C) -4.8 -6.8 -2.2 -0.4 6.6 12.4 17.8 17.4 13.6 8.4 3.6 0.0 -6.8 DAY 30 7 8 12 6 4 12 15 14 24 29 27 MAXIMUM AIR TEMPERATURE (C) 14.9 13.5 15.6 23.1 32.9 38.7 40.9 39.9 36.2 30.0 20.7 14.4 26.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 25 30 31 31 30 17 0 0 168 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.8 22.4 20.8 33.0 39.8 43.6 44.4 42.2 40.4 35.6 25.6 20.0 44.4 DAY 9 21 3 27 28 28 9 11 1 16 8 8 DIF. BETWEEN (MAX.-MIN.) (C) 11.5 13.6 11.3 14.2 17.5 19.2 20.5 20.3 19.9 16.2 11.2 9.4 15.4 MEAN DAILY TEMP. (MDT) (C) 9.2 6.7 10.0 16.0 24.1 29.1 30.7 29.7 26.2 21.9 15.1 9.7 19.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 5.2 114.2 243.5 300.2 270.3 156.8 54.9 0.0 0.0 1145.2 HEATING DEG. DAYS(BASE 18 0C) 273.8 316.3 248.9 84.4 5.2 0.0 0.0 0.0 0.0 4.6 92.7 257.6 1283.5 DEWPOINT (MEAN C) 2.7 -1.9 3.1 7.3 7.7 4.2 6.0 7.0 3.5 7.2 8.4 5.4 5.1 MIXING RATIO (G/KG) 4.97 3.62 5.19 7.02 7.08 5.62 6.35 6.78 5.35 6.85 7.45 6.00 6.02 VAPOUR PRESSURE (HPA) 7.58 5.54 7.89 10.63 10.70 8.46 9.53 10.20 8.11 10.40 11.33 9.16 9.13 SATURATION DEF. (HPA) 3.99 4.75 4.82 8.96 22.79 37.44 40.08 35.88 28.95 16.80 5.54 2.74 17.73 RELATIVE HUMIDITY (MEAN %) 71 61 66 61 39 23 23 27 27 45 71 80 50 RELATIVE HUMIDITY (MAX. %) 89 87 88 86 65 41 40 46 44 65 91 94 70 RELATIVE HUMIDITY (MIN. %) 42 33 43 33 19 10 10 12 11 24 45 57 28 RELATIVE HUMIDITY (MEAN% 03UTC) 86 79 81 78 58 37 39 45 42 62 86 89 65 RELATIVE HUMIDITY (MEAN% 09UTC) 50 39 52 41 23 11 12 14 13 28 50 63 33 RELATIVE HUMIDITY (MEAN% 15UTC) 63 46 55 47 24 12 12 15 18 36 65 79 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 77.8 29.8 104.2 59.3 5.9 0.2 0.0 0.0 0.0 20.0 124.1 114.2 535.5 DAYS WITH PRECIPITATION >=10 2 1 4 4 0 0 0 0 0 1 4 5 21 DAYS WITH PRECIPITATION >= 5 2 1 6 4 0 0 0 0 0 1 6 8 28 DAYS WITH PRECIPITATION >= 1 5 5 10 4 1 0 0 0 0 3 8 11 47 DAYS WITH PRECIPITATION 5 7 13 7 7 2 0 0 0 4 11 13 69 GREATEST DAILY PRECIPITATION 43.2 15.0 27.1 25.0 3.4 0.2 0.0 0.0 0.0 14.0 54.0 30.0 54.0 DAY 16 19 29 17 19 6 ** ** ** 19 4 18 DAY WITH THUNDER STORM 1 1 3 6 1 1 0 0 0 2 4 1 20 DAYS WITH SNOW OR SLEET 0 1 1 1 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 0 1 0 0 0 0 0 0 1 1 0 3 WIND DIRECTION (PREVAILING) 225 225 180 270 135 270 315 315 270 270 135 360 270 PREVAILING WIND SPEED(KNOTS) 11.9 11.9 10.5 10.1 11.8 8.3 8.7 7.6 8.2 6.9 11.3 7.1 7.8 PREVAILING WIND PERCENT 4.0 8.0 8.5 5.8 9.3 14.6 13.3 12.5 9.2 4.4 6.3 2.8 5.5 CALMS PERCENT OF WIND 84.3 70.5 69.0 78.8 66.9 69.2 69.8 73.4 80.0 84.7 82.9 90.3 76.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 223 218 202 255 181 262 302 310 289 257 165 212 249 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.6 1.3 1.0 1.0 1.6 1.9 1.8 0.9 0.5 1.0 0.2 0.8 WIND STEADINESES (MEAN %) 53.3 57.1 43.3 50.0 31.3 59.3 76.0 90.0 56.3 38.5 58.8 22.2 38.1 WIND SPEED (MEAN KNOTS) 1.5 2.8 3.0 2.0 3.2 2.7 2.5 2.0 1.6 1.3 1.7 0.9 2.1 FASTEST WIND DIRECTION 160 170 160 330 130 160 30 350 140 150 140 150 160 FASTEST WIND SPEED (KNOTS) 27 23 23 19 23 25 17 16 19 19 23 25 27 DAY 15 4 3 4 11 11 26 12 15 18 4 9 DAYS WITH SKY CLEAR (0-2)/8 17 16 10 10 18 24 30 31 28 18 13 6 221 DAYS WITH P.CLOUDY (3-6)/8 10 10 13 14 11 6 1 0 2 10 9 17 103 DAYS WITH CLOUDY (7-8)/8 4 2 8 6 2 0 0 0 0 3 8 8 41 DAYS WITH VISIBILITY =< 2 KM 2 0 0 0 0 0 0 0 0 0 1 1 4 DURATION OF SUNSHINE HOURS 200.6 220.9 210.4 245.1 301.7 335.1 383.2 368.6 328.9 256.1 194.9 165.8 3211.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 958.1 959.1 954.1 953.6 951.4 946.1 942.5 945.5 951.2 956.2 957.2 958.9 952.8 MAX. QFE PRESSURE IN HPA 963.0 968.4 964.5 963.2 957.7 953.5 947.5 949.4 958.4 960.8 962.9 964.9 968.4 DAY-HOUR 5-18 7- 6 1- 6 13- 6 6- 6 8- 0 26- 6 31-18 30- 6 8- 6 8- 6 30- 6 MIN. QFE PRESSURE IN HPA 942.6 948.8 944.1 944.0 942.3 938.9 938.4 941.1 945.5 951.0 950.3 946.7 938.4 DAY-HOUR 15-18 21-15 28-18 4-15 21-15 28-15 3-15 5-12 2-15 2- 3 30-15 9- 3 MEAN QNH PRESSURE IN HPA 1022.1 1023.2 1017.8 1017.4 1015.0 1009.4 1005.6 1008.8 1014.8 1020.1 1021.1 1022.9 1016.5 MAX. QNH PRESSURE IN HPA 1027.2 1032.9 1028.8 1027.4 1021.6 1017.2 1010.9 1012.9 1022.4 1024.9 1027.1 1029.2 1032.9 DAY-HOUR 5-18 7- 6 1- 6 13- 6 6- 6 8- 0 26- 6 31-18 30- 6 8- 6 8- 6 30- 6 MIN. QNH PRESSURE IN HPA 1005.7 1012.3 1007.3 1007.2 1005.4 1001.8 1001.3 1004.1 1008.8 1014.6 1013.8 1010.0 1001.3 DAY-HOUR 15-18 21-15 28-18 4-15 21-15 28-15 3-15 5-12 2-15 2- 3 30-15 9- 3 MEAN QFF PRESSURE IN HPA 1022.9 1024.6 1018.3 1016.4 1012.1 1005.4 1001.3 1004.7 1011.6 1017.9 1020.4 1023.5 1014.9 MAX. QFF PRESSURE IN HPA 1028.7 1036.4 1030.3 1028.4 1020.6 1014.0 1006.3 1009.2 1019.9 1023.2 1025.5 1030.6 1036.4 DAY-HOUR 5-18 7- 6 1- 6 13- 6 6- 6 8- 0 26- 6 31-18 30- 6 25- 6 29- 6 27- 6 MIN. QFF PRESSURE IN HPA 1005.4 1011.6 1007.2 1006.0 1001.9 997.2 997.1 999.9 1005.1 1011.4 1014.3 1009.4 997.1 DAY-HOUR 15-18 21-15 28-18 4-15 21-15 28-15 3-15 5-12 2-12 6- 0 30-15 9- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 958.2 959.0 954.1 953.3 951.4 946.2 942.4 945.2 950.9 956.0 957.0 958.8 952.7 MAX. QFE PRESSURE IN HPA 962.1 966.9 964.3 962.5 956.3 953.5 945.6 948.2 957.2 959.5 961.0 964.6 966.9 DAY 6 7 1 13 7 8 18 21 30 29 7 30 MIN. QFE PRESSURE IN HPA 945.2 953.0 945.5 946.2 945.5 939.5 939.2 941.9 946.1 951.0 954.1 949.8 939.2 DAY 16 22 29 5 31 29 12 1 3 6 11 10 MEAN QNH PRESSURE IN HPA 1022.1 1023.0 1017.8 1017.0 1014.9 1009.5 1005.5 1008.5 1014.5 1019.9 1020.9 1022.8 1016.4 MAX. QNH PRESSURE IN HPA 1026.3 1031.3 1028.6 1026.7 1020.2 1017.2 1008.9 1011.6 1021.1 1023.5 1025.1 1028.9 1031.3 DAY 6 7 1 13 7 8 18 21 30 29 7 30 MIN. QNH PRESSURE IN HPA 1008.5 1016.7 1008.8 1009.5 1008.8 1002.4 1002.1 1005.0 1009.4 1014.6 1017.8 1013.3 1002.1 DAY 16 22 29 5 31 29 12 1 3 6 11 10 MEAN QFF PRESSURE IN HPA 1022.7 1024.3 1018.2 1015.9 1012.1 1005.6 1001.1 1004.4 1011.1 1017.5 1020.1 1023.2 1014.7 MAX. QFF PRESSURE IN HPA 1027.1 1034.4 1029.9 1027.8 1018.6 1014.0 1004.9 1007.8 1018.5 1021.8 1024.0 1030.1 1034.4 DAY 6 7 1 13 7 8 18 21 30 29 7 30 MIN. QFF PRESSURE IN HPA 1008.5 1015.7 1008.6 1008.1 1004.6 997.6 998.0 1000.6 1005.4 1011.4 1016.7 1012.7 997.6 DAY 16 22 29 5 31 29 12 1 12 6 4 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 958.0 959.0 954.0 953.6 951.6 946.3 942.7 945.6 951.3 956.3 957.2 958.5 952.8 MAX. QFE PRESSURE IN HPA 962.6 966.8 964.0 962.2 956.1 952.6 946.7 948.8 957.3 960.0 961.9 964.8 966.8 DAY 11 7 1 13 6 8 26 11 30 8 8 30 MIN. QFE PRESSURE IN HPA 945.6 952.5 944.4 946.6 945.1 939.5 939.9 942.1 946.6 951.0 952.7 946.7 939.5 DAY 16 21 29 5 4 29 12 1 12 2 11 9 MEAN QNH PRESSURE IN HPA 1021.9 1023.0 1017.7 1017.3 1015.2 1009.7 1005.8 1008.9 1014.9 1020.1 1021.1 1022.5 1016.5 MAX. QNH PRESSURE IN HPA 1026.8 1031.2 1028.3 1026.4 1019.9 1016.3 1010.0 1012.3 1021.2 1024.1 1026.1 1029.1 1031.2 DAY 11 7 1 13 6 8 26 11 30 8 8 30 MIN. QNH PRESSURE IN HPA 1008.9 1016.2 1007.6 1009.9 1008.4 1002.4 1002.9 1005.2 1009.9 1014.6 1016.4 1010.0 1002.4 DAY 16 21 29 5 4 29 12 1 12 2 11 9 MEAN QFF PRESSURE IN HPA 1022.9 1024.6 1018.3 1016.5 1012.5 1005.9 1001.7 1005.1 1012.0 1018.3 1020.7 1023.3 1015.1 MAX. QFF PRESSURE IN HPA 1027.7 1034.9 1030.1 1027.8 1019.3 1013.1 1005.9 1008.6 1019.2 1022.3 1025.2 1030.5 1034.9 DAY 5 7 1 13 6 8 26 21 30 8 8 30 MIN. QFF PRESSURE IN HPA 1008.8 1015.9 1007.6 1008.9 1005.4 998.0 998.9 1001.0 1006.2 1012.2 1015.5 1009.4 998.0 DAY 16 21 29 5 4 29 13 1 2 2 11 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 958.9 959.9 954.8 954.3 952.5 946.8 943.1 946.1 952.0 957.1 958.0 959.6 953.6 MAX. QFE PRESSURE IN HPA 963.0 968.4 964.5 963.2 957.7 952.0 947.5 949.3 958.4 960.8 962.9 964.9 968.4 DAY 13 7 1 13 6 2 26 11 30 8 8 30 MIN. QFE PRESSURE IN HPA 948.3 953.0 944.6 948.1 947.1 940.3 940.1 942.2 946.9 951.4 951.9 950.7 940.1 DAY 16 21 29 5 21 29 12 5 2 2 11 9 MEAN QNH PRESSURE IN HPA 1022.9 1023.9 1018.6 1018.1 1016.1 1010.1 1006.2 1009.4 1015.6 1021.0 1022.0 1023.6 1017.3 MAX. QNH PRESSURE IN HPA 1027.2 1032.9 1028.8 1027.4 1021.6 1015.6 1010.9 1012.8 1022.4 1024.9 1027.1 1029.2 1032.9 DAY 13 7 1 13 6 2 26 11 30 8 8 30 MIN. QNH PRESSURE IN HPA 1011.7 1016.7 1007.8 1011.5 1010.5 1003.3 1003.1 1005.3 1010.2 1015.0 1015.5 1014.3 1003.1 DAY 16 21 29 5 21 29 12 5 2 2 11 9 MEAN QFF PRESSURE IN HPA 1024.1 1025.7 1019.2 1017.1 1013.2 1005.8 1001.7 1005.1 1012.4 1018.9 1021.5 1024.5 1015.8 MAX. QFF PRESSURE IN HPA 1028.6 1036.4 1030.3 1028.4 1020.6 1012.2 1006.3 1008.5 1019.9 1023.2 1025.5 1030.6 1036.4 DAY 5 7 1 13 6 2 26 31 30 25 29 27 MIN. QFF PRESSURE IN HPA 1011.6 1016.6 1008.0 1010.7 1007.2 998.7 998.6 1000.6 1006.5 1012.4 1014.8 1013.4 998.6 DAY 16 21 29 5 31 29 12 5 2 2 11 9 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 958.5 959.6 954.7 954.4 952.0 946.5 942.7 945.8 951.5 956.6 957.3 959.1 953.2 MAX. QFE PRESSURE IN HPA 963.0 968.1 964.0 963.0 957.1 952.3 946.7 949.1 957.8 960.4 961.7 964.9 968.1 DAY 13 7 1 13 6 2 18 31 30 9 6 30 MIN. QFE PRESSURE IN HPA 948.8 951.2 945.0 948.8 947.3 940.1 939.9 942.0 946.6 951.7 953.5 949.6 939.9 DAY 16 21 29 4 21 28 12 5 2 2 11 9 MEAN QNH PRESSURE IN HPA 1022.5 1023.6 1018.4 1018.2 1015.7 1009.9 1005.9 1009.0 1015.2 1020.5 1021.2 1023.1 1016.9 MAX. QNH PRESSURE IN HPA 1027.2 1032.6 1028.3 1027.2 1021.0 1015.9 1010.0 1012.6 1021.7 1024.5 1025.9 1029.2 1032.6 DAY 13 7 1 13 6 2 18 31 30 9 6 30 MIN. QNH PRESSURE IN HPA 1012.3 1014.8 1008.2 1012.3 1010.7 1003.1 1002.9 1005.1 1009.9 1015.3 1017.2 1013.1 1002.9 DAY 16 21 29 4 21 28 12 5 2 2 11 9 MEAN QFF PRESSURE IN HPA 1023.1 1024.9 1018.8 1017.1 1012.7 1005.8 1001.5 1004.9 1011.7 1018.0 1020.4 1023.6 1015.2 MAX. QFF PRESSURE IN HPA 1028.0 1035.5 1029.3 1028.0 1019.9 1013.1 1006.1 1008.6 1019.1 1022.6 1024.5 1030.0 1035.5 DAY 5 7 1 13 6 2 18 31 30 25 6 30 MIN. QFF PRESSURE IN HPA 1012.3 1014.4 1008.9 1010.3 1007.1 998.3 998.5 1000.6 1005.9 1012.1 1016.6 1012.2 998.3 DAY 16 21 29 4 21 28 12 5 2 2 11 9 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 957.2 958.2 953.3 953.3 950.7 945.8 941.8 944.9 950.6 955.6 956.4 958.1 952.2 MAX. QFE PRESSURE IN HPA 961.4 965.8 962.5 961.4 956.0 951.8 945.8 948.6 956.3 960.0 961.0 963.6 965.8 DAY 5 7 1 12 6 2 18 31 30 8 6 30 MIN. QFE PRESSURE IN HPA 945.3 949.2 944.2 947.2 944.5 939.1 938.7 941.1 945.8 951.0 952.2 948.0 938.7 DAY 15 21 29 4 21 28 12 5 2 2 30 9 MEAN QNH PRESSURE IN HPA 1021.1 1022.2 1017.0 1017.0 1014.3 1009.1 1004.9 1008.2 1014.1 1019.4 1020.3 1022.1 1015.8 MAX. QNH PRESSURE IN HPA 1025.5 1030.2 1026.7 1025.5 1019.8 1015.4 1009.1 1012.0 1020.2 1024.1 1025.1 1027.9 1030.2 DAY 5 7 1 12 6 2 18 31 30 8 6 30 MIN. QNH PRESSURE IN HPA 1008.6 1012.7 1007.4 1010.6 1007.7 1002.0 1001.6 1004.1 1009.1 1014.6 1015.8 1011.4 1001.6 DAY 15 21 29 4 21 28 12 5 2 2 30 9 MEAN QFF PRESSURE IN HPA 1021.7 1023.4 1017.3 1016.0 1011.4 1005.2 1000.6 1004.1 1010.8 1017.0 1019.4 1022.5 1014.1 MAX. QFF PRESSURE IN HPA 1026.3 1032.9 1027.6 1026.8 1018.8 1012.8 1005.2 1008.3 1017.7 1022.0 1023.8 1028.9 1032.9 DAY 5 6 1 12 6 2 18 31 30 8 6 27 MIN. QFF PRESSURE IN HPA 1009.1 1012.2 1007.7 1008.4 1004.4 997.4 997.4 999.9 1005.1 1011.5 1016.3 1010.5 997.4 DAY 15 21 28 27 21 28 12 5 2 2 30 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 957.8 958.5 953.3 953.0 950.2 945.1 941.6 944.8 950.5 955.7 956.8 958.7 952.1 MAX. QFE PRESSURE IN HPA 962.0 965.4 962.0 961.2 955.3 951.0 945.8 948.0 955.6 960.2 961.3 964.0 965.4 DAY 5 6 1 12 6 2 18 31 30 8 6 29 MIN. QFE PRESSURE IN HPA 944.6 948.8 944.6 944.0 942.3 938.9 938.4 941.1 945.5 951.3 950.3 949.3 938.4 DAY 15 21 28 4 21 28 3 5 2 5 30 9 MEAN QNH PRESSURE IN HPA 1021.7 1022.4 1017.0 1016.6 1013.7 1008.4 1004.7 1008.1 1014.0 1019.5 1020.7 1022.6 1015.8 MAX. QNH PRESSURE IN HPA 1026.2 1029.7 1026.2 1025.3 1019.1 1014.6 1009.1 1011.4 1019.4 1024.3 1025.4 1028.3 1029.7 DAY 5 6 1 12 6 2 18 31 30 8 6 29 MIN. QNH PRESSURE IN HPA 1007.8 1012.3 1007.8 1007.2 1005.4 1001.8 1001.3 1004.1 1008.8 1014.9 1013.8 1012.8 1001.3 DAY 15 21 28 4 21 28 3 5 2 5 30 9 MEAN QFF PRESSURE IN HPA 1022.7 1024.0 1017.5 1015.8 1011.0 1004.6 1000.6 1004.3 1011.1 1017.7 1020.3 1023.5 1014.4 MAX. QFF PRESSURE IN HPA 1027.5 1033.2 1027.5 1026.8 1018.0 1012.2 1005.6 1008.0 1017.6 1022.7 1024.8 1029.8 1033.2 DAY 5 6 1 12 6 2 18 31 30 8 6 29 MIN. QFF PRESSURE IN HPA 1008.0 1011.6 1007.3 1006.0 1001.9 997.2 997.1 1000.0 1005.1 1012.9 1014.3 1012.4 997.1 DAY 15 21 28 4 21 28 3 5 2 5 30 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 958.3 959.6 954.3 953.7 951.3 946.0 942.8 946.0 951.4 956.4 957.4 959.2 953.0 MAX. QFE PRESSURE IN HPA 963.0 966.3 962.7 962.1 956.0 951.8 946.8 949.4 956.8 960.8 961.8 964.2 966.3 DAY 5 6 1 12 6 7 18 31 30 8 6 29 MIN. QFE PRESSURE IN HPA 942.6 952.6 944.1 946.6 943.6 939.6 940.0 941.9 946.2 952.2 952.9 949.1 939.6 DAY 15 21 28 4 21 28 12 5 2 5 30 8 MEAN QNH PRESSURE IN HPA 1022.2 1023.6 1018.0 1017.4 1014.8 1009.3 1005.9 1009.3 1015.0 1020.2 1021.3 1023.2 1016.7 MAX. QNH PRESSURE IN HPA 1027.2 1030.7 1026.9 1026.3 1019.8 1015.4 1010.1 1012.9 1020.7 1024.9 1026.0 1028.5 1030.7 DAY 5 6 1 12 6 7 18 31 30 8 6 29 MIN. QNH PRESSURE IN HPA 1005.7 1016.3 1007.3 1009.9 1006.8 1002.6 1003.0 1005.0 1009.5 1015.8 1016.6 1012.6 1002.6 DAY 15 21 28 4 21 28 12 5 2 5 30 8 MEAN QFF PRESSURE IN HPA 1023.4 1025.3 1018.6 1016.4 1011.9 1004.9 1001.4 1005.0 1011.8 1018.2 1020.9 1024.0 1015.1 MAX. QFF PRESSURE IN HPA 1028.7 1034.3 1028.2 1027.5 1018.5 1012.3 1005.9 1009.2 1018.6 1022.4 1025.2 1030.0 1034.3 DAY 5 6 1 12 6 2 18 31 30 8 6 29 MIN. QFF PRESSURE IN HPA 1005.4 1015.7 1007.2 1007.9 1003.0 997.4 998.4 1000.2 1005.8 1013.4 1016.4 1011.5 997.4 DAY 15 21 28 27 21 28 3 5 2 5 30 8 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 958.4 959.6 954.4 953.7 951.7 946.3 943.1 945.9 951.7 956.3 957.3 959.2 953.1 MAX. QFE PRESSURE IN HPA 962.7 966.9 962.4 962.5 956.5 953.0 946.8 949.4 958.0 960.0 961.6 964.2 966.9 DAY 5 6 10 12 6 7 18 31 29 8 6 29 MIN. QFE PRESSURE IN HPA 944.4 953.8 945.5 946.6 946.1 940.0 940.2 941.9 946.6 951.6 953.4 949.4 940.0 DAY 15 21 28 4 21 28 11 5 11 5 30 8 MEAN QNH PRESSURE IN HPA 1022.4 1023.6 1018.1 1017.4 1015.3 1009.6 1006.3 1009.2 1015.3 1020.2 1021.2 1023.2 1016.8 MAX. QNH PRESSURE IN HPA 1026.9 1031.3 1026.6 1026.7 1020.4 1016.7 1010.1 1012.9 1021.9 1024.1 1025.7 1028.5 1031.3 DAY 5 6 10 12 6 7 18 31 29 8 6 29 MIN. QNH PRESSURE IN HPA 1007.6 1017.5 1008.8 1009.9 1009.4 1003.0 1003.2 1005.0 1009.9 1015.2 1017.1 1012.9 1003.0 DAY 15 21 28 4 21 28 11 5 11 5 30 8 MEAN QFF PRESSURE IN HPA 1023.0 1024.9 1018.5 1016.3 1012.3 1005.5 1001.8 1005.0 1011.9 1017.7 1020.4 1023.7 1015.1 MAX. QFF PRESSURE IN HPA 1028.5 1034.5 1027.8 1027.9 1018.8 1013.4 1006.2 1009.1 1019.2 1021.7 1024.6 1029.6 1034.5 DAY 31 6 20 12 6 7 18 31 29 28 6 29 MIN. QFF PRESSURE IN HPA 1007.6 1016.7 1008.8 1008.2 1005.4 997.9 998.7 1000.4 1006.1 1012.0 1016.9 1011.5 997.9 DAY 15 21 28 27 21 28 12 5 11 5 2 8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.8 8.8 11.8 17.9 24.3 31.9 33.8 33.6 27.7 22.4 17.3 12.0 20.6 MINIMUN AIR TEMPERATURE (C) 2.2 4.4 6.1 10.2 14.8 20.6 24.0 23.0 17.9 13.5 10.1 5.8 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 9 25 27 3 1 0 0 66 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 12 3 1 0 0 0 0 0 0 0 0 0 16 TEMPERATURE RECORDS LOWEST(C) -2.4 -1.4 -0.2 6.2 8.2 15.2 18.6 19.6 14.0 8.6 6.4 1.6 -2.4 DAY 17 18 26 25 1 3 8 23 27 26 18 20 MAXIMUM AIR TEMPERATURE (C) 10.9 14.3 18.0 25.8 33.1 41.0 42.4 43.6 37.7 32.0 26.6 20.2 28.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 23 30 31 31 30 23 1 0 176 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.0 20.8 24.2 33.5 40.8 44.8 45.6 46.8 42.6 36.4 30.0 25.6 46.8 DAY 20 6 16 16 9 23 20 28 1 5 9 9 DIF. BETWEEN (MAX.-MIN.) (C) 8.7 9.9 11.9 15.6 18.3 20.4 18.4 20.6 19.8 18.5 16.5 14.4 16.1 MEAN DAILY TEMP. (MDT) (C) 6.5 9.4 12.1 18.0 24.0 30.8 33.2 33.3 27.8 22.8 18.3 13.0 20.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 9.3 102.5 294.0 378.2 381.6 203.6 65.4 0.2 0.0 1434.9 HEATING DEG. DAYS(BASE 18 0C) 355.3 241.5 184.3 41.9 0.7 0.0 0.0 0.0 0.0 1.2 8.4 156.0 989.1 DEWPOINT (MEAN C) 2.5 3.2 6.2 9.4 7.6 5.4 8.1 7.4 6.5 2.7 4.8 1.7 5.5 MIXING RATIO (G/KG) 4.88 5.16 6.40 7.93 7.12 6.10 7.34 6.95 6.55 4.96 5.83 4.58 6.15 VAPOUR PRESSURE (HPA) 7.45 7.87 9.73 12.00 10.77 9.19 10.99 10.44 9.89 7.55 8.88 7.01 9.31 SATURATION DEF. (HPA) 2.05 3.92 4.80 9.90 22.23 41.74 44.95 45.57 30.40 21.64 12.05 7.73 20.58 RELATIVE HUMIDITY (MEAN %) 81 71 72 62 41 23 23 23 30 31 49 53 47 RELATIVE HUMIDITY (MAX. %) 94 89 91 87 68 42 39 38 49 50 71 74 66 RELATIVE HUMIDITY (MIN. %) 61 50 48 34 18 9 12 10 12 14 23 28 27 RELATIVE HUMIDITY (MEAN% 03UTC) 89 82 82 82 64 36 35 35 47 46 64 71 61 RELATIVE HUMIDITY (MEAN% 09UTC) 67 58 56 41 21 11 13 11 14 16 28 33 31 RELATIVE HUMIDITY (MEAN% 15UTC) 77 65 63 48 24 12 14 13 19 24 43 42 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 165.2 48.3 116.6 30.0 0.8 0.0 0.0 0.0 0.0 0.0 37.4 0.1 398.4 DAYS WITH PRECIPITATION >=10 7 1 6 2 0 0 0 0 0 0 1 0 17 DAYS WITH PRECIPITATION >= 5 11 4 8 2 0 0 0 0 0 0 1 0 26 DAYS WITH PRECIPITATION >= 1 14 9 11 5 0 0 0 0 0 0 2 0 41 DAYS WITH PRECIPITATION 18 12 15 9 2 3 0 0 0 0 3 2 64 GREATEST DAILY PRECIPITATION 38.9 15.0 27.0 12.0 0.4 0.0 0.0 0.0 0.0 0.0 33.0 0.1 38.9 DAY 5 15 18 28 13 ** ** ** ** ** 11 1 DAY WITH THUNDER STORM 4 1 1 4 0 1 1 0 1 0 1 0 14 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 0 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 135 135 225 180 270 135 135 270 315 135 180 45 135 PREVAILING WIND SPEED(KNOTS) 9.5 14.5 11.4 11.4 8.3 11.7 13.5 7.9 7.7 16.0 12.8 6.0 12.9 PREVAILING WIND PERCENT 6.0 7.6 6.9 4.6 6.5 9.6 9.3 6.5 5.0 9.7 2.5 0.4 4.6 CALMS PERCENT OF WIND 83.9 73.7 73.8 83.8 77.0 70.8 74.2 79.0 86.7 83.5 91.3 98.4 81.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 162 141 201 240 252 173 175 297 308 140 218 0 189 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.0 1.4 0.6 0.8 0.6 0.7 0.4 0.6 1.4 0.6 0.0 0.5 WIND STEADINESES (MEAN %) 64.3 38.5 51.9 35.3 38.1 22.2 26.9 21.1 60.0 66.7 54.5 0.0 27.8 WIND SPEED (MEAN KNOTS) 1.4 2.6 2.7 1.7 2.1 2.7 2.6 1.9 1.0 2.1 1.1 0.1 1.8 FASTEST WIND DIRECTION 180 130 140 160 350 230 120 150 340 120 210 270 180 FASTEST WIND SPEED (KNOTS) 49 27 41 27 31 39 23 23 16 31 25 8 49 DAY 11 23 16 27 3 16 20 8 3 10 10 3 DAYS WITH SKY CLEAR (0-2)/8 10 9 11 13 16 28 29 30 29 27 19 12 233 DAYS WITH P.CLOUDY (3-6)/8 8 10 9 10 15 2 2 1 1 4 8 12 82 DAYS WITH CLOUDY (7-8)/8 13 9 11 7 0 0 0 0 0 0 3 7 50 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 0 0 DURATION OF SUNSHINE HOURS 137.9 155.4 188.5 276.7 315.9 372.0 378.4 360.8 324.2 309.0 223.0 175.3 3217.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 957.7 957.6 955.2 953.5 951.4 946.9 942.6 945.0 949.4 954.4 957.6 959.6 952.6 MAX. QFE PRESSURE IN HPA 966.4 964.8 963.0 961.7 957.3 952.2 946.8 948.2 955.3 959.8 962.1 966.5 966.5 DAY-HOUR 22- 6 5- 6 21-21 12- 9 8- 9 5- 6 23- 6 26- 6 26- 3 28-21 27- 6 5- 6 MIN. QFE PRESSURE IN HPA 947.4 948.0 942.9 944.9 943.5 937.9 938.1 941.4 944.3 948.8 949.2 953.6 937.9 DAY-HOUR 12- 3 7-15 17- 0 17-12 28-15 30-15 2-15 4-15 15-15 1-15 10-18 17- 0 MEAN QNH PRESSURE IN HPA 1021.7 1021.6 1019.0 1017.2 1015.0 1010.3 1005.7 1008.3 1012.9 1018.2 1021.5 1023.6 1016.2 MAX. QNH PRESSURE IN HPA 1030.8 1029.1 1027.2 1025.9 1021.2 1015.8 1010.1 1011.6 1019.1 1023.8 1026.3 1030.9 1030.9 DAY-HOUR 22- 6 5- 6 21-21 12- 9 8- 9 5- 6 23- 6 26- 6 26- 3 28-21 27- 6 5- 6 MIN. QNH PRESSURE IN HPA 1010.8 1011.4 1006.0 1008.1 1006.7 1000.8 1001.0 1004.5 1007.5 1012.3 1012.7 1017.3 1000.8 DAY-HOUR 12- 3 7-15 17- 0 17-12 28-15 30-15 2-15 4-15 15-15 1-15 10-18 17- 0 MEAN QFF PRESSURE IN HPA 1023.1 1022.3 1019.0 1015.7 1012.2 1005.9 1000.9 1003.5 1009.3 1015.8 1020.3 1023.7 1014.3 MAX. QFF PRESSURE IN HPA 1033.0 1030.0 1028.0 1024.8 1018.5 1011.7 1005.0 1007.2 1016.8 1022.4 1026.3 1031.9 1033.0 DAY-HOUR 22- 6 2- 6 21-21 2- 6 3-18 5- 6 19- 6 26- 6 26- 3 29- 6 27- 6 5- 6 MIN. QFF PRESSURE IN HPA 1011.8 1010.5 1003.9 1005.5 1002.7 996.3 996.2 999.2 1002.8 1009.4 1010.8 1015.4 996.2 DAY-HOUR 12- 3 7-15 17- 0 17-12 28-21 30-15 2-12 4-15 16- 0 1-12 10-18 17- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 957.5 957.6 955.0 953.3 951.4 947.1 942.4 944.9 949.3 954.1 957.5 959.5 952.5 MAX. QFE PRESSURE IN HPA 965.0 963.9 962.7 961.3 955.8 951.0 945.6 947.1 955.1 958.8 961.1 964.8 965.0 DAY 15 5 22 12 4 7 23 26 26 29 21 5 MIN. QFE PRESSURE IN HPA 948.0 948.8 942.9 947.4 946.1 940.8 938.2 942.9 944.4 949.7 950.4 953.6 938.2 DAY 12 8 17 17 29 30 1 5 16 1 11 17 MEAN QNH PRESSURE IN HPA 1021.4 1021.6 1018.8 1017.0 1015.0 1010.4 1005.5 1008.1 1012.8 1017.9 1021.4 1023.5 1016.1 MAX. QNH PRESSURE IN HPA 1029.3 1028.2 1026.9 1025.4 1019.6 1014.6 1008.9 1010.5 1018.9 1022.8 1025.2 1029.1 1029.3 DAY 15 5 22 12 4 7 23 26 26 29 21 5 MIN. QNH PRESSURE IN HPA 1011.4 1012.3 1006.0 1010.8 1009.4 1003.8 1001.1 1006.0 1007.6 1013.2 1013.9 1017.3 1001.1 DAY 12 8 17 17 29 30 1 5 16 1 11 17 MEAN QFF PRESSURE IN HPA 1022.7 1022.2 1018.7 1015.4 1012.2 1006.1 1000.7 1003.2 1009.1 1015.2 1019.8 1023.1 1014.0 MAX. QFF PRESSURE IN HPA 1031.6 1028.3 1027.7 1023.7 1017.5 1010.5 1003.6 1005.7 1016.1 1020.8 1023.6 1029.5 1031.6 DAY 15 2 22 12 4 7 23 26 26 29 21 5 MIN. QFF PRESSURE IN HPA 1012.1 1011.4 1003.9 1007.6 1005.1 999.3 996.2 1000.5 1002.8 1010.1 1010.9 1015.4 996.2 DAY 12 8 17 17 29 30 1 5 16 1 11 17 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 957.5 957.4 954.8 953.4 951.7 947.5 942.8 945.3 949.6 954.5 957.6 959.5 952.6 MAX. QFE PRESSURE IN HPA 964.8 963.9 962.0 961.0 956.1 951.0 946.2 947.8 955.3 959.0 961.1 965.0 965.0 DAY 22 5 22 12 8 5 23 26 26 29 21 5 MIN. QFE PRESSURE IN HPA 947.4 948.8 944.2 947.8 946.5 941.1 938.2 943.1 945.1 950.0 952.2 954.0 938.2 DAY 12 15 17 21 29 30 1 13 16 1 11 17 MEAN QNH PRESSURE IN HPA 1021.4 1021.4 1018.6 1017.1 1015.3 1010.9 1006.0 1008.6 1013.1 1018.3 1021.5 1023.5 1016.3 MAX. QNH PRESSURE IN HPA 1029.1 1028.2 1026.2 1025.1 1019.9 1014.6 1009.5 1011.2 1019.1 1023.0 1025.2 1029.3 1029.3 DAY 22 5 22 12 8 5 23 26 26 29 21 5 MIN. QNH PRESSURE IN HPA 1010.8 1012.3 1007.4 1011.2 1009.8 1004.1 1001.1 1006.2 1008.4 1013.5 1015.8 1017.7 1001.1 DAY 12 15 17 21 29 30 1 13 16 1 11 17 MEAN QFF PRESSURE IN HPA 1023.1 1022.3 1018.7 1015.9 1012.7 1006.7 1001.3 1004.0 1009.8 1016.3 1020.7 1023.8 1014.6 MAX. QFF PRESSURE IN HPA 1031.3 1028.9 1027.3 1023.7 1017.6 1010.8 1004.6 1006.7 1016.8 1021.7 1024.9 1030.3 1031.3 DAY 22 2 22 12 4 7 23 26 26 29 27 5 MIN. QFF PRESSURE IN HPA 1011.8 1012.8 1005.3 1009.3 1005.9 999.7 996.6 1001.4 1004.1 1011.1 1013.5 1017.4 996.6 DAY 12 8 17 17 29 30 1 5 16 1 11 17 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 958.5 958.5 955.7 954.1 952.2 947.7 943.2 945.8 950.2 955.4 958.6 960.7 953.4 MAX. QFE PRESSURE IN HPA 966.4 964.8 962.8 961.4 957.0 952.2 946.8 948.2 955.1 959.8 962.1 966.5 966.5 DAY 22 5 22 12 8 5 23 26 26 29 27 5 MIN. QFE PRESSURE IN HPA 949.3 949.8 945.6 947.3 947.0 940.9 939.2 943.4 946.1 950.8 953.7 955.9 939.2 DAY 12 15 17 17 30 30 1 13 16 1 10 17 MEAN QNH PRESSURE IN HPA 1022.5 1022.5 1019.5 1017.9 1015.9 1011.1 1006.3 1009.1 1013.7 1019.2 1022.6 1024.8 1017.1 MAX. QNH PRESSURE IN HPA 1030.8 1029.1 1027.0 1025.5 1020.9 1015.8 1010.1 1011.6 1018.9 1023.8 1026.3 1030.9 1030.9 DAY 22 5 22 12 8 5 23 26 26 29 27 5 MIN. QNH PRESSURE IN HPA 1012.8 1013.3 1008.9 1010.7 1010.4 1003.9 1002.1 1006.6 1009.4 1014.4 1017.4 1019.7 1002.1 DAY 12 15 17 17 30 30 1 13 16 1 10 17 MEAN QFF PRESSURE IN HPA 1024.2 1023.5 1019.6 1016.4 1012.9 1006.6 1001.3 1004.3 1010.1 1017.0 1021.7 1025.3 1015.2 MAX. QFF PRESSURE IN HPA 1033.0 1030.0 1027.8 1024.8 1018.5 1011.7 1005.0 1007.2 1016.1 1022.4 1026.3 1031.9 1033.0 DAY 22 2 22 2 4 5 19 26 26 29 27 5 MIN. QFF PRESSURE IN HPA 1013.8 1013.9 1007.0 1008.0 1005.9 998.9 997.1 1001.4 1005.3 1011.7 1015.6 1019.6 997.1 DAY 12 7 17 17 29 30 1 13 16 1 11 17 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 958.0 958.2 955.5 953.9 952.0 947.3 943.0 945.5 949.8 954.7 957.7 959.9 953.0 MAX. QFE PRESSURE IN HPA 964.6 964.6 962.0 961.7 957.3 952.1 946.6 947.8 954.1 959.1 961.5 965.6 965.6 DAY 22 5 21 12 8 5 22 29 26 26 21 5 MIN. QFE PRESSURE IN HPA 948.2 950.4 946.1 946.3 946.7 939.9 939.0 943.0 945.4 949.9 952.2 955.1 939.0 DAY 12 15 17 17 30 30 1 12 12 1 10 17 MEAN QNH PRESSURE IN HPA 1021.9 1022.2 1019.3 1017.6 1015.7 1010.7 1006.1 1008.8 1013.3 1018.5 1021.7 1024.0 1016.6 MAX. QNH PRESSURE IN HPA 1028.9 1028.9 1026.2 1025.9 1021.2 1015.7 1009.9 1011.2 1017.8 1023.1 1025.6 1030.0 1030.0 DAY 22 5 21 12 8 5 22 29 26 26 21 5 MIN. QNH PRESSURE IN HPA 1011.6 1013.9 1009.4 1009.6 1010.0 1002.9 1001.9 1006.1 1008.7 1013.4 1015.8 1018.9 1001.9 DAY 12 15 17 17 30 30 1 12 12 1 10 17 MEAN QFF PRESSURE IN HPA 1023.2 1022.8 1019.1 1016.0 1012.8 1006.3 1001.2 1003.9 1009.6 1015.8 1020.1 1023.6 1014.5 MAX. QFF PRESSURE IN HPA 1030.3 1028.9 1027.2 1023.7 1018.2 1011.7 1004.5 1006.4 1015.0 1021.3 1023.8 1030.1 1030.3 DAY 22 5 21 1 3 5 22 26 27 26 21 5 MIN. QFF PRESSURE IN HPA 1012.5 1013.7 1007.7 1006.9 1006.3 998.0 997.0 1000.8 1004.4 1010.2 1013.8 1017.5 997.0 DAY 12 7 17 17 29 30 2 12 12 1 10 17 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 956.9 956.8 954.6 953.1 950.9 946.2 942.1 944.4 948.6 953.6 956.6 958.7 951.9 MAX. QFE PRESSURE IN HPA 963.2 962.9 961.3 960.4 955.1 951.0 945.0 947.0 952.9 958.1 960.5 964.1 964.1 DAY 14 2 21 12 3 5 22 29 26 25 21 5 MIN. QFE PRESSURE IN HPA 947.8 949.2 945.1 944.9 945.9 938.3 938.2 942.1 944.8 949.0 950.1 954.6 938.2 DAY 12 7 1 17 30 30 2 12 12 1 10 17 MEAN QNH PRESSURE IN HPA 1020.8 1020.7 1018.4 1016.7 1014.4 1009.5 1005.2 1007.6 1012.0 1017.3 1020.5 1022.7 1015.5 MAX. QNH PRESSURE IN HPA 1027.4 1027.1 1025.4 1024.5 1018.9 1014.6 1008.2 1010.4 1016.6 1022.1 1024.6 1028.4 1028.4 DAY 14 2 21 12 3 5 22 29 26 25 21 5 MIN. QNH PRESSURE IN HPA 1011.2 1012.7 1008.4 1008.1 1009.2 1001.2 1001.1 1005.2 1008.0 1012.5 1013.6 1018.4 1001.1 DAY 12 7 1 17 30 30 2 12 12 1 10 17 MEAN QFF PRESSURE IN HPA 1022.0 1021.3 1018.2 1015.2 1011.7 1005.3 1000.3 1002.7 1008.3 1014.7 1018.9 1022.4 1013.4 MAX. QFF PRESSURE IN HPA 1029.6 1027.7 1026.3 1022.8 1017.0 1010.7 1003.2 1005.3 1013.9 1020.3 1022.7 1028.6 1029.6 DAY 14 2 21 2 3 5 19 25 26 25 21 5 MIN. QFF PRESSURE IN HPA 1011.8 1011.7 1007.1 1005.5 1006.0 996.4 996.2 999.9 1003.1 1009.4 1011.9 1016.9 996.2 DAY 29 7 17 17 28 30 2 4 12 1 10 17 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 957.6 957.0 954.7 952.7 950.3 945.7 941.6 944.0 948.4 953.8 957.1 959.3 951.9 MAX. QFE PRESSURE IN HPA 964.0 963.2 961.5 960.0 955.0 950.4 944.0 946.8 953.1 958.1 960.8 964.6 964.6 DAY 21 2 21 12 3 5 19 29 26 28 21 6 MIN. QFE PRESSURE IN HPA 948.1 948.0 943.2 945.1 943.5 937.9 938.1 941.4 944.3 948.8 951.6 954.2 937.9 DAY 12 7 16 17 28 30 2 4 15 1 10 23 MEAN QNH PRESSURE IN HPA 1021.5 1020.9 1018.5 1016.4 1013.9 1009.0 1004.6 1007.2 1011.8 1017.5 1021.0 1023.3 1015.5 MAX. QNH PRESSURE IN HPA 1028.3 1027.4 1025.6 1024.1 1018.8 1013.9 1007.2 1010.1 1016.8 1022.1 1024.9 1028.9 1028.9 DAY 21 2 21 12 3 5 19 29 26 28 21 6 MIN. QNH PRESSURE IN HPA 1011.5 1011.4 1006.3 1008.4 1006.7 1000.8 1001.0 1004.5 1007.5 1012.3 1015.2 1017.9 1000.8 DAY 12 7 16 17 28 30 2 4 15 1 10 23 MEAN QFF PRESSURE IN HPA 1023.1 1021.7 1018.6 1015.2 1011.3 1004.8 1000.0 1002.7 1008.6 1015.6 1020.2 1023.6 1013.8 MAX. QFF PRESSURE IN HPA 1030.7 1028.6 1026.8 1022.3 1017.6 1009.8 1002.7 1005.4 1014.6 1020.9 1024.1 1029.8 1030.7 DAY 14 2 21 2 3 5 31 29 26 26 21 6 MIN. QFF PRESSURE IN HPA 1013.0 1010.5 1005.5 1005.8 1002.8 996.3 996.4 999.2 1003.3 1009.6 1013.7 1018.5 996.3 DAY 29 7 16 17 28 30 2 4 12 1 10 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 958.1 957.8 955.7 953.8 951.5 946.8 942.7 945.2 949.5 954.7 957.9 959.8 952.8 MAX. QFE PRESSURE IN HPA 965.2 964.0 962.6 960.7 956.4 951.4 945.6 947.4 954.1 959.1 961.4 965.2 965.2 DAY 21 2 21 12 3 5 19 29 26 25 12 6 MIN. QFE PRESSURE IN HPA 948.8 949.9 944.4 948.0 944.5 938.9 939.2 942.5 945.2 949.7 949.2 953.8 938.9 DAY 12 7 16 17 28 30 2 4 15 1 10 23 MEAN QNH PRESSURE IN HPA 1022.1 1021.8 1019.5 1017.5 1015.1 1010.1 1005.9 1008.5 1013.0 1018.5 1021.8 1023.8 1016.5 MAX. QNH PRESSURE IN HPA 1029.5 1028.3 1026.8 1024.8 1020.3 1015.0 1008.9 1010.8 1017.8 1023.1 1025.5 1029.5 1029.5 DAY 21 2 21 12 3 5 19 29 26 25 12 6 MIN. QNH PRESSURE IN HPA 1012.3 1013.4 1007.6 1011.4 1007.7 1001.8 1002.1 1005.6 1008.5 1013.2 1012.7 1017.5 1001.8 DAY 12 7 16 17 28 30 2 4 15 1 10 23 MEAN QFF PRESSURE IN HPA 1023.8 1022.7 1019.6 1016.0 1012.1 1005.5 1000.9 1003.7 1009.5 1016.3 1020.9 1024.3 1014.6 MAX. QFF PRESSURE IN HPA 1031.6 1029.7 1027.8 1023.1 1018.5 1010.8 1004.1 1006.3 1015.2 1021.7 1024.4 1030.8 1031.6 DAY 14 2 21 11 3 5 18 2 26 25 12 6 MIN. QFF PRESSURE IN HPA 1014.1 1012.6 1006.1 1008.6 1002.9 996.7 997.1 1000.4 1004.7 1010.3 1010.8 1018.4 996.7 DAY 12 7 16 17 28 30 1 12 15 1 10 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 958.0 957.8 955.6 953.8 951.7 947.2 943.2 945.3 949.8 954.8 957.7 959.6 952.9 MAX. QFE PRESSURE IN HPA 965.1 963.9 963.0 961.3 956.1 951.9 946.1 947.3 955.1 959.8 961.4 965.0 965.1 DAY 21 4 21 11 3 5 22 29 25 28 12 6 MIN. QFE PRESSURE IN HPA 948.8 949.9 944.0 948.0 944.5 938.9 939.6 943.0 944.9 950.6 950.1 953.8 938.9 DAY 11 7 16 17 28 30 1 12 15 1 10 16 MEAN QNH PRESSURE IN HPA 1021.9 1021.7 1019.5 1017.5 1015.3 1010.6 1006.3 1008.6 1013.3 1018.5 1021.7 1023.7 1016.5 MAX. QNH PRESSURE IN HPA 1029.4 1028.2 1027.2 1025.4 1019.9 1015.5 1009.4 1010.7 1018.9 1023.8 1025.5 1029.3 1029.4 DAY 21 4 21 11 3 5 22 29 25 28 12 6 MIN. QNH PRESSURE IN HPA 1012.3 1013.4 1007.2 1011.4 1007.7 1001.8 1002.6 1006.1 1008.1 1014.2 1013.6 1017.5 1001.8 DAY 11 7 16 17 28 30 1 12 15 1 10 16 MEAN QFF PRESSURE IN HPA 1023.2 1022.3 1019.3 1015.9 1012.3 1006.1 1001.4 1003.7 1009.5 1015.9 1020.1 1023.4 1014.4 MAX. QFF PRESSURE IN HPA 1031.6 1028.7 1028.0 1023.6 1018.1 1011.4 1004.6 1005.9 1015.8 1021.8 1024.3 1029.6 1031.6 DAY 14 2 21 11 2 5 31 23 26 28 12 6 MIN. QFF PRESSURE IN HPA 1012.9 1012.8 1005.3 1008.1 1002.7 996.9 997.6 1000.9 1004.0 1010.5 1010.8 1016.0 996.9 DAY 11 7 16 17 28 30 1 12 15 1 10 16 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.6 10.4 13.5 18.3 26.0 30.9 33.0 33.5 27.2 22.8 13.7 10.4 20.8 MINIMUN AIR TEMPERATURE (C) 5.0 4.5 6.3 9.8 15.3 20.2 23.0 23.1 17.1 14.2 6.9 4.2 12.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 7 23 29 1 0 0 0 62 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 1 0 0 0 0 0 0 0 0 2 2 5 TEMPERATURE RECORDS LOWEST(C) 0.6 -1.0 1.0 4.6 8.6 15.6 18.4 20.4 13.2 10.8 -1.6 -0.8 -1.6 DAY 22 22 26 10 2 5 3 27 26 19 29 5 MAXIMUM AIR TEMPERATURE (C) 15.5 17.5 20.4 26.8 35.1 39.3 41.2 43.3 37.0 32.0 21.6 18.1 29.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 6 31 30 31 31 30 19 0 0 179 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.2 21.4 30.2 34.0 42.8 43.6 43.8 46.6 42.2 39.0 27.2 25.6 46.6 DAY 7 28 31 30 30 1 19 31 3 3 4 31 DIF. BETWEEN (MAX.-MIN.) (C) 10.5 13.0 14.1 17.0 19.8 19.1 18.2 20.2 19.9 17.8 14.7 13.9 16.5 MEAN DAILY TEMP. (MDT) (C) 10.2 11.0 13.4 18.3 25.2 29.7 32.1 33.2 27.1 23.1 14.2 11.1 20.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 2.6 16.4 132.3 261.3 344.6 378.6 181.7 72.9 0.0 0.0 1390.4 HEATING DEG. DAYS(BASE 18 0C) 240.8 194.9 148.8 35.8 0.0 0.0 0.0 0.0 0.0 0.0 114.4 212.5 947.1 DEWPOINT (MEAN C) 2.7 3.6 3.3 6.2 4.1 5.4 7.5 7.6 6.9 6.5 3.8 2.6 5.0 MIXING RATIO (G/KG) 5.12 5.28 5.26 6.39 5.63 6.07 7.18 7.09 6.72 6.47 5.44 4.99 5.97 VAPOUR PRESSURE (HPA) 7.80 8.05 7.98 9.68 8.52 9.14 10.74 10.65 10.14 9.82 8.30 7.64 9.04 SATURATION DEF. (HPA) 4.49 5.18 8.42 12.95 28.18 38.56 42.28 44.72 28.90 20.02 8.40 5.60 20.64 RELATIVE HUMIDITY (MEAN %) 68 66 55 51 30 23 24 23 32 40 56 64 44 RELATIVE HUMIDITY (MAX. %) 86 87 82 78 53 40 41 40 52 61 81 86 66 RELATIVE HUMIDITY (MIN. %) 45 38 30 24 12 11 11 10 13 19 29 36 23 RELATIVE HUMIDITY (MEAN% 03UTC) 78 83 72 72 50 38 37 40 51 58 75 81 61 RELATIVE HUMIDITY (MEAN% 09UTC) 49 46 35 31 14 12 13 12 16 21 34 40 27 RELATIVE HUMIDITY (MEAN% 15UTC) 63 54 39 35 17 13 16 12 19 30 45 53 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 118.4 78.6 11.9 11.0 1.3 0.0 5.1 0.0 0.0 13.3 8.1 25.0 272.7 DAYS WITH PRECIPITATION >=10 3 3 0 0 0 0 0 0 0 1 0 0 7 DAYS WITH PRECIPITATION >= 5 5 3 0 0 0 0 0 0 0 1 1 0 10 DAYS WITH PRECIPITATION >= 1 6 5 4 6 1 0 1 0 0 3 3 8 37 DAYS WITH PRECIPITATION 10 6 9 6 1 0 2 0 0 5 6 9 54 GREATEST DAILY PRECIPITATION 75.0 43.0 4.1 3.0 1.3 0.0 4.3 0.0 0.0 10.0 5.0 4.6 75.0 DAY 9 20 4 26 7 ** 15 ** ** 31 26 11 DAY WITH THUNDER STORM 0 1 3 2 0 0 1 0 0 4 1 0 12 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 0 5 2 3 1 0 0 0 0 11 WIND DIRECTION (PREVAILING) 135 180 180 180 270 270 270 315 315 270 270 315 315 PREVAILING WIND SPEED(KNOTS) 14.7 12.0 10.5 12.1 8.3 7.8 7.1 8.0 7.7 7.1 6.3 6.0 7.4 PREVAILING WIND PERCENT 6.9 5.4 7.3 4.6 6.0 6.7 6.0 10.5 5.0 3.6 3.3 1.6 3.7 CALMS PERCENT OF WIND 87.9 84.4 75.0 82.5 79.4 81.3 70.6 77.4 87.1 88.7 92.1 95.2 83.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 152 209 191 196 306 307 170 322 310 272 194 267 246 VECTOR WIND MAGNITUDE(KNOTS) 1.3 0.5 1.3 0.8 0.9 1.0 0.5 1.5 0.5 0.5 0.2 0.1 0.3 WIND STEADINESES (MEAN %) 81.2 33.3 50.0 44.4 50.0 71.4 16.7 83.3 62.5 50.0 25.0 33.3 20.0 WIND SPEED (MEAN KNOTS) 1.6 1.5 2.6 1.8 1.8 1.4 3.0 1.8 0.8 1.0 0.8 0.3 1.5 FASTEST WIND DIRECTION 130 170 220 130 170 310 120 340 320 340 140 210 120 FASTEST WIND SPEED (KNOTS) 25 25 23 23 25 16 31 16 16 29 21 12 31 DAY 2 18 26 1 13 10 28 11 20 30 30 15 DAYS WITH SKY CLEAR (0-2)/8 15 18 16 18 24 26 29 27 30 19 12 14 248 DAYS WITH P.CLOUDY (3-6)/8 10 4 9 8 3 3 2 3 0 12 16 8 78 DAYS WITH CLOUDY (7-8)/8 6 6 6 4 4 1 0 1 0 0 2 9 39 DAYS WITH VISIBILITY =< 2 KM 1 0 1 0 2 2 3 1 0 0 0 3 13 DURATION OF SUNSHINE HOURS 185.5 211.7 235.2 281.4 315.3 340.9 325.5 333.7 327.5 266.6 217.1 189.0 3229.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 957.4 957.0 953.6 953.0 949.9 945.9 942.1 944.9 949.2 954.2 957.6 960.8 952.1 MAX. QFE PRESSURE IN HPA 964.3 963.4 961.4 958.7 957.9 951.8 947.0 951.2 955.0 957.9 964.2 964.8 964.8 DAY-HOUR 11- 6 22- 9 18- 0 10- 6 1- 9 6- 9 1- 6 19- 6 30-18 23- 6 16- 6 28-18 MIN. QFE PRESSURE IN HPA 945.9 946.0 944.0 942.1 944.2 938.8 935.1 938.8 945.8 949.8 950.7 954.8 935.1 DAY-HOUR 9- 3 5-15 26- 3 8- 0 13-15 24-15 13-12 14-15 7-12 3-12 1- 3 15-12 MEAN QNH PRESSURE IN HPA 1021.3 1020.9 1017.3 1016.7 1013.4 1009.2 1005.2 1008.1 1012.7 1018.0 1021.5 1024.9 1015.8 MAX. QNH PRESSURE IN HPA 1028.6 1027.6 1025.5 1022.7 1021.8 1015.4 1010.4 1014.8 1018.8 1021.8 1028.5 1029.1 1029.1 DAY-HOUR 11- 6 22- 9 18- 0 10- 6 1- 9 6- 9 1- 6 19- 6 30-18 23- 6 16- 6 28-18 MIN. QNH PRESSURE IN HPA 1009.2 1009.3 1007.2 1005.2 1007.4 1001.7 997.8 1001.7 1009.1 1013.3 1014.3 1018.6 997.8 DAY-HOUR 9- 3 5-15 26- 3 8- 0 13-15 24-15 13-12 14-15 7-12 3-12 1- 3 15-12 MEAN QFF PRESSURE IN HPA 1021.9 1021.3 1016.9 1015.2 1010.3 1005.0 1000.5 1003.4 1009.3 1015.5 1021.1 1025.3 1013.8 MAX. QFF PRESSURE IN HPA 1029.6 1029.8 1026.3 1022.4 1019.7 1011.5 1006.0 1009.9 1015.5 1019.9 1030.6 1030.6 1030.6 DAY-HOUR 11- 6 22- 6 18- 0 10- 6 1- 9 6- 9 1- 3 19- 6 30-18 23- 6 29- 6 28-18 MIN. QFF PRESSURE IN HPA 1009.3 1010.2 1005.4 1002.4 1003.2 997.4 992.2 997.0 1005.2 1009.7 1012.8 1018.4 992.2 DAY-HOUR 9- 3 5-15 26- 3 8- 0 13-15 24-12 13-12 14-12 7-12 3-12 1- 3 31-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 957.4 957.3 953.6 952.8 950.3 946.2 942.3 945.0 949.2 954.3 957.6 960.9 952.2 MAX. QFE PRESSURE IN HPA 963.5 962.4 961.4 958.0 957.4 950.9 946.8 950.4 953.0 956.8 963.0 964.5 964.5 DAY 11 22 18 11 2 6 9 20 30 28 16 29 MIN. QFE PRESSURE IN HPA 947.0 948.7 945.1 942.1 946.1 939.6 937.4 940.0 946.5 950.6 952.4 957.1 937.4 DAY 9 6 26 8 20 25 14 15 7 4 1 14 MEAN QNH PRESSURE IN HPA 1021.3 1021.2 1017.3 1016.5 1013.8 1009.5 1005.4 1008.3 1012.7 1018.1 1021.5 1025.1 1015.9 MAX. QNH PRESSURE IN HPA 1027.7 1026.6 1025.5 1021.9 1021.3 1014.5 1010.1 1013.9 1016.7 1020.7 1027.2 1028.8 1028.8 DAY 11 22 18 11 2 6 9 20 30 28 16 29 MIN. QNH PRESSURE IN HPA 1010.4 1012.1 1008.4 1005.2 1009.4 1002.6 1000.2 1003.0 1009.8 1014.2 1016.0 1021.0 1000.2 DAY 9 6 26 8 20 25 14 15 7 4 1 14 MEAN QFF PRESSURE IN HPA 1021.6 1021.3 1016.8 1014.8 1010.7 1005.3 1000.7 1003.4 1009.1 1015.3 1020.8 1025.1 1013.8 MAX. QFF PRESSURE IN HPA 1028.4 1028.7 1026.3 1021.3 1019.3 1011.1 1005.9 1009.1 1012.9 1018.7 1028.4 1029.6 1029.6 DAY 11 22 18 11 2 6 9 20 30 21 29 5 MIN. QFF PRESSURE IN HPA 1009.7 1012.5 1006.6 1002.4 1006.0 997.7 995.2 997.9 1005.9 1010.6 1013.9 1020.9 995.2 DAY 9 6 26 8 20 25 14 15 7 4 8 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 957.2 957.0 953.3 952.8 950.2 946.2 942.5 945.3 949.3 954.3 957.4 960.5 952.2 MAX. QFE PRESSURE IN HPA 963.8 962.4 960.8 958.0 956.9 951.1 946.6 950.2 953.6 957.0 963.4 963.5 963.8 DAY 11 22 18 11 2 6 9 19 30 21 29 29 MIN. QFE PRESSURE IN HPA 945.9 949.3 944.0 942.4 945.7 940.7 937.4 940.7 946.9 951.0 950.7 957.1 937.4 DAY 9 6 26 8 20 25 14 15 7 4 1 14 MEAN QNH PRESSURE IN HPA 1021.1 1020.9 1017.0 1016.5 1013.8 1009.6 1005.6 1008.6 1012.8 1018.1 1021.3 1024.6 1015.8 MAX. QNH PRESSURE IN HPA 1028.1 1026.6 1024.9 1021.9 1020.8 1014.7 1009.9 1013.7 1017.3 1020.9 1027.6 1027.7 1028.1 DAY 11 22 18 11 2 6 9 19 30 21 29 29 MIN. QNH PRESSURE IN HPA 1009.2 1012.8 1007.2 1005.5 1009.0 1003.7 1000.2 1003.7 1010.2 1014.6 1014.3 1021.0 1000.2 DAY 9 6 26 8 20 25 14 15 7 4 1 14 MEAN QFF PRESSURE IN HPA 1021.8 1021.4 1016.8 1015.2 1010.9 1005.6 1001.1 1004.1 1009.6 1016.0 1021.2 1025.3 1014.1 MAX. QFF PRESSURE IN HPA 1029.2 1028.9 1025.8 1021.6 1019.1 1011.3 1006.0 1009.2 1014.3 1019.5 1029.9 1029.2 1029.9 DAY 11 22 18 11 2 6 1 19 30 21 29 5 MIN. QFF PRESSURE IN HPA 1009.3 1013.2 1005.4 1003.2 1005.8 999.6 995.3 999.0 1006.7 1011.9 1012.8 1021.2 995.3 DAY 9 20 26 8 20 25 14 15 7 10 1 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 958.3 958.1 954.3 953.8 950.7 946.6 942.8 945.7 950.0 955.2 958.4 961.6 953.0 MAX. QFE PRESSURE IN HPA 964.3 963.3 960.8 958.7 957.7 951.4 947.0 951.2 954.8 957.9 964.2 964.5 964.5 DAY 11 22 18 10 1 6 1 19 30 23 16 29 MIN. QFE PRESSURE IN HPA 947.6 950.1 944.2 946.3 946.4 941.0 938.1 941.8 947.2 951.9 951.9 957.4 938.1 DAY 9 20 26 8 20 24 14 14 12 31 1 15 MEAN QNH PRESSURE IN HPA 1022.2 1022.1 1018.0 1017.6 1014.3 1009.9 1005.9 1009.0 1013.5 1019.0 1022.4 1025.8 1016.6 MAX. QNH PRESSURE IN HPA 1028.6 1027.5 1024.9 1022.7 1021.6 1015.0 1010.4 1014.8 1018.6 1021.8 1028.5 1028.8 1028.8 DAY 11 22 18 10 1 6 1 19 30 23 16 29 MIN. QNH PRESSURE IN HPA 1011.0 1013.6 1007.4 1009.6 1009.7 1004.0 1001.0 1004.9 1010.6 1015.5 1015.5 1021.3 1001.0 DAY 9 20 26 8 20 24 14 14 12 31 1 15 MEAN QFF PRESSURE IN HPA 1023.1 1022.7 1017.8 1016.1 1011.0 1005.5 1001.1 1004.1 1010.0 1016.6 1022.2 1026.6 1014.7 MAX. QFF PRESSURE IN HPA 1029.6 1029.8 1025.6 1022.4 1019.6 1011.0 1005.7 1009.9 1015.3 1019.9 1030.6 1030.4 1030.6 DAY 11 22 18 10 1 6 1 19 30 23 29 29 MIN. QFF PRESSURE IN HPA 1011.2 1013.6 1005.9 1008.6 1006.5 999.0 996.0 999.9 1006.6 1012.2 1014.0 1022.0 996.0 DAY 9 20 26 8 20 24 14 14 7 10 8 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 957.8 957.6 954.1 953.6 950.4 946.2 942.4 945.2 949.5 954.6 957.8 960.9 952.5 MAX. QFE PRESSURE IN HPA 964.3 963.4 961.0 958.7 957.9 951.8 947.0 950.8 954.0 957.4 963.7 964.0 964.3 DAY 11 22 18 11 1 6 1 19 30 23 16 28 MIN. QFE PRESSURE IN HPA 947.6 948.6 946.1 947.9 946.8 940.1 937.2 940.4 946.8 951.2 951.9 955.8 937.2 DAY 9 20 2 8 20 24 13 14 7 3 1 31 MEAN QNH PRESSURE IN HPA 1021.7 1021.5 1017.8 1017.3 1013.9 1009.6 1005.5 1008.5 1013.0 1018.3 1021.7 1025.0 1016.2 MAX. QNH PRESSURE IN HPA 1028.6 1027.6 1025.1 1022.7 1021.8 1015.4 1010.4 1014.4 1017.7 1021.3 1028.0 1028.3 1028.6 DAY 11 22 18 11 1 6 1 19 30 23 16 28 MIN. QNH PRESSURE IN HPA 1011.0 1012.0 1009.4 1011.3 1010.1 1003.1 1000.0 1003.4 1010.1 1014.8 1015.5 1019.6 1000.0 DAY 9 20 2 8 20 24 13 14 7 3 1 31 MEAN QFF PRESSURE IN HPA 1022.1 1021.7 1017.3 1015.7 1010.7 1005.3 1000.7 1003.6 1009.4 1015.5 1021.0 1025.2 1014.0 MAX. QFF PRESSURE IN HPA 1029.3 1029.4 1025.7 1022.0 1019.7 1011.5 1006.0 1009.5 1014.1 1019.0 1028.3 1029.0 1029.4 DAY 11 22 18 10 1 6 1 19 30 23 29 28 MIN. QFF PRESSURE IN HPA 1011.2 1012.0 1009.0 1009.8 1006.6 998.0 995.0 998.4 1006.1 1011.0 1013.9 1019.2 995.0 DAY 9 20 2 27 18 24 13 14 7 3 1 31 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 956.6 956.0 952.8 952.4 949.2 945.3 941.4 944.0 948.4 953.5 956.8 959.8 951.3 MAX. QFE PRESSURE IN HPA 962.9 961.9 960.1 957.0 956.4 950.7 946.4 949.1 953.2 956.8 962.5 963.6 963.6 DAY 11 22 18 10 1 6 1 19 30 29 16 28 MIN. QFE PRESSURE IN HPA 948.1 946.9 945.8 947.6 945.1 939.3 935.1 939.0 945.8 949.8 951.0 954.8 935.1 DAY 8 5 2 7 13 24 13 14 7 3 11 15 MEAN QNH PRESSURE IN HPA 1020.5 1019.8 1016.4 1016.0 1012.7 1008.6 1004.4 1007.2 1011.8 1017.2 1020.6 1023.8 1014.9 MAX. QNH PRESSURE IN HPA 1027.1 1026.1 1024.2 1020.9 1020.3 1014.3 1009.7 1012.6 1016.9 1020.7 1026.7 1027.9 1027.9 DAY 11 22 18 10 1 6 1 19 30 29 16 28 MIN. QNH PRESSURE IN HPA 1011.5 1010.2 1009.1 1011.0 1008.4 1002.2 997.8 1001.9 1009.1 1013.3 1014.6 1018.6 997.8 DAY 8 5 2 7 13 24 13 14 7 3 11 15 MEAN QFF PRESSURE IN HPA 1020.8 1019.9 1015.9 1014.4 1009.6 1004.5 999.8 1002.4 1008.3 1014.5 1020.0 1023.9 1012.8 MAX. QFF PRESSURE IN HPA 1027.5 1027.6 1024.8 1020.2 1018.4 1010.8 1005.6 1007.8 1013.3 1018.5 1027.1 1028.4 1028.4 DAY 11 22 18 10 1 6 1 19 30 29 29 28 MIN. QFF PRESSURE IN HPA 1011.0 1010.7 1007.7 1008.6 1004.9 997.4 992.2 997.0 1005.2 1009.7 1013.6 1018.4 992.2 DAY 8 5 20 27 13 24 13 14 7 3 11 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 957.0 956.1 952.9 952.2 948.8 944.8 941.1 943.7 948.5 953.5 957.1 960.5 951.3 MAX. QFE PRESSURE IN HPA 962.9 962.1 959.8 957.4 955.9 950.0 945.8 948.1 953.4 956.6 962.8 964.1 964.1 DAY 11 22 17 10 1 6 1 19 30 29 16 28 MIN. QFE PRESSURE IN HPA 947.5 946.0 944.8 946.3 944.2 938.8 935.3 938.8 946.0 950.0 951.8 954.8 935.3 DAY 8 5 20 7 13 24 13 14 7 3 11 15 MEAN QNH PRESSURE IN HPA 1020.9 1020.0 1016.6 1015.8 1012.3 1008.1 1004.1 1006.8 1011.9 1017.2 1021.0 1024.6 1014.9 MAX. QNH PRESSURE IN HPA 1027.1 1026.3 1023.8 1021.3 1019.7 1013.5 1009.1 1011.5 1017.1 1020.5 1027.0 1028.4 1028.4 DAY 11 22 17 10 1 6 1 19 30 29 16 28 MIN. QNH PRESSURE IN HPA 1010.9 1009.3 1008.0 1009.6 1007.4 1001.7 998.0 1001.7 1009.3 1013.5 1015.4 1018.6 998.0 DAY 8 5 20 7 13 24 13 14 7 3 11 15 MEAN QFF PRESSURE IN HPA 1021.6 1020.5 1016.3 1014.5 1009.4 1004.1 999.7 1002.4 1008.8 1015.2 1020.9 1025.2 1013.2 MAX. QFF PRESSURE IN HPA 1028.4 1028.0 1024.9 1021.1 1017.9 1010.1 1005.3 1007.2 1014.0 1018.9 1027.2 1029.6 1029.6 DAY 11 22 17 10 1 6 1 19 30 29 17 28 MIN. QFF PRESSURE IN HPA 1011.1 1010.2 1006.4 1008.3 1003.2 997.5 992.7 997.1 1005.9 1010.6 1015.0 1019.0 992.7 DAY 8 5 20 7 13 24 13 14 7 3 11 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 957.7 957.0 953.7 953.1 949.7 945.8 942.1 945.1 949.6 954.4 957.9 961.1 952.3 MAX. QFE PRESSURE IN HPA 963.7 962.4 960.5 958.3 956.9 950.2 946.5 949.9 955.0 957.0 963.9 964.8 964.8 DAY 10 22 17 10 1 6 1 19 30 29 16 28 MIN. QFE PRESSURE IN HPA 948.1 947.2 944.8 945.5 946.1 939.7 936.1 940.4 947.1 950.1 953.2 955.3 936.1 DAY 8 5 20 7 24 24 13 14 7 31 11 15 MEAN QNH PRESSURE IN HPA 1021.6 1020.9 1017.4 1016.8 1013.2 1009.1 1005.2 1008.3 1013.1 1018.1 1021.9 1025.2 1015.9 MAX. QNH PRESSURE IN HPA 1028.0 1026.6 1024.6 1022.3 1020.8 1013.7 1009.8 1013.4 1018.8 1020.9 1028.2 1029.1 1029.1 DAY 10 22 17 10 1 6 1 19 30 29 16 28 MIN. QNH PRESSURE IN HPA 1011.5 1010.6 1008.0 1008.8 1009.4 1002.7 998.9 1003.4 1010.5 1013.6 1016.9 1019.1 998.9 DAY 8 5 20 7 24 24 13 14 7 31 11 15 MEAN QFF PRESSURE IN HPA 1022.4 1021.6 1017.1 1015.4 1009.9 1004.6 1000.4 1003.5 1009.6 1015.7 1021.7 1026.0 1014.0 MAX. QFF PRESSURE IN HPA 1028.8 1028.5 1025.5 1021.7 1018.8 1009.8 1005.4 1008.8 1015.5 1019.4 1028.0 1030.6 1030.6 DAY 10 22 17 10 1 6 1 19 30 29 16 28 MIN. QFF PRESSURE IN HPA 1011.6 1011.4 1007.0 1007.4 1005.3 997.9 993.9 998.7 1006.7 1011.4 1016.3 1019.4 993.9 DAY 8 5 20 7 25 24 13 14 7 3 11 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 957.7 957.2 954.0 953.3 950.2 946.2 942.4 945.4 949.6 954.4 957.9 960.9 952.4 MAX. QFE PRESSURE IN HPA 963.7 962.4 961.0 958.3 957.8 951.0 946.8 950.1 955.0 957.0 963.9 964.4 964.4 DAY 10 21 17 10 1 6 1 19 30 22 16 28 MIN. QFE PRESSURE IN HPA 947.4 947.9 946.8 943.1 946.7 940.0 936.7 940.4 947.0 951.1 953.2 956.0 936.7 DAY 8 5 20 7 17 24 13 14 6 3 7 13 MEAN QNH PRESSURE IN HPA 1021.6 1021.1 1017.8 1017.0 1013.8 1009.5 1005.5 1008.7 1013.1 1018.2 1021.8 1025.0 1016.1 MAX. QNH PRESSURE IN HPA 1028.0 1026.6 1025.1 1022.3 1021.7 1014.6 1010.1 1013.6 1018.8 1020.9 1028.2 1028.7 1028.7 DAY 10 21 17 10 1 6 1 19 30 22 16 28 MIN. QNH PRESSURE IN HPA 1010.8 1011.3 1010.1 1006.2 1010.0 1003.0 999.5 1003.4 1010.4 1014.7 1016.9 1019.8 999.5 DAY 8 5 20 7 17 24 13 14 6 3 7 13 MEAN QFF PRESSURE IN HPA 1022.0 1021.3 1017.2 1015.4 1010.4 1005.2 1000.7 1003.7 1009.5 1015.3 1021.2 1025.2 1013.9 MAX. QFF PRESSURE IN HPA 1028.7 1028.6 1025.9 1021.4 1019.7 1011.0 1005.8 1008.7 1015.2 1019.0 1028.3 1029.4 1029.4 DAY 10 21 17 10 1 6 1 19 30 29 28 28 MIN. QFF PRESSURE IN HPA 1010.4 1011.8 1008.5 1004.3 1006.3 998.0 994.4 998.5 1006.3 1010.9 1014.8 1019.7 994.4 DAY 8 5 20 7 17 24 13 14 7 3 7 13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.1 8.3 12.0 20.5 25.4 30.3 35.8 33.1 26.9 19.9 13.8 9.6 20.2 MINIMUN AIR TEMPERATURE (C) 2.1 1.5 4.2 13.0 15.8 20.1 25.8 22.7 17.5 11.9 7.1 5.4 12.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 1 10 31 28 3 0 0 0 75 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 10 12 6 0 0 0 0 0 0 0 0 0 28 TEMPERATURE RECORDS LOWEST(C) -2.4 -2.4 -2.0 3.8 10.6 15.2 21.0 15.8 14.4 6.0 0.8 1.0 -2.4 DAY 22 6 16 11 13 23 3 31 2 29 28 28 MAXIMUM AIR TEMPERATURE (C) 13.1 15.8 19.7 28.2 33.8 39.4 44.6 42.8 36.7 28.7 21.7 15.2 28.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 27 30 31 31 30 10 0 0 166 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 22.6 26.0 34.0 38.6 43.8 46.8 46.5 39.2 33.8 25.2 19.0 46.8 DAY 1 24 22 28 25 30 30 2 5 10 7 3 DIF. BETWEEN (MAX.-MIN.) (C) 11.0 14.3 15.5 15.2 18.0 19.3 18.8 20.1 19.2 16.8 14.6 9.8 16.1 MEAN DAILY TEMP. (MDT) (C) 7.6 8.6 12.0 20.6 24.8 29.7 35.2 32.7 27.1 20.3 14.4 10.3 20.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 29.9 120.1 262.3 439.4 363.3 183.0 18.1 0.0 0.0 1416.3 HEATING DEG. DAYS(BASE 18 0C) 322.5 271.3 190.4 10.4 0.0 0.0 0.0 0.0 0.0 9.1 108.5 238.9 1151.0 DEWPOINT (MEAN C) 1.2 -0.5 0.7 6.6 5.2 3.0 6.9 6.5 6.9 6.2 4.3 5.6 4.4 MIXING RATIO (G/KG) 4.45 3.96 4.48 6.63 6.09 5.19 6.88 6.56 6.67 6.41 5.63 6.05 5.75 VAPOUR PRESSURE (HPA) 6.80 6.05 6.82 10.04 9.20 7.83 10.30 9.85 10.07 9.73 8.59 9.24 8.71 SATURATION DEF. (HPA) 3.76 5.64 8.36 15.58 25.52 38.27 51.71 44.60 27.81 15.10 8.04 3.03 20.62 RELATIVE HUMIDITY (MEAN %) 70 59 52 45 32 21 19 22 31 46 58 78 44 RELATIVE HUMIDITY (MAX. %) 89 85 79 70 56 37 33 38 48 69 80 93 65 RELATIVE HUMIDITY (MIN. %) 42 30 25 22 13 9 9 10 15 25 35 57 24 RELATIVE HUMIDITY (MEAN% 03UTC) 80 79 75 62 53 36 29 36 46 65 76 89 61 RELATIVE HUMIDITY (MEAN% 09UTC) 50 38 30 29 16 10 10 11 18 27 36 62 28 RELATIVE HUMIDITY (MEAN% 15UTC) 63 44 37 31 18 11 12 12 20 34 50 76 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 87.9 8.8 31.3 22.1 2.5 0.0 0.0 0.0 0.3 10.2 42.6 173.8 379.5 DAYS WITH PRECIPITATION >=10 3 0 1 0 0 0 0 0 0 0 2 6 12 DAYS WITH PRECIPITATION >= 5 4 0 1 2 0 0 0 0 0 1 3 8 19 DAYS WITH PRECIPITATION >= 1 8 2 4 4 1 0 0 0 0 3 5 13 40 DAYS WITH PRECIPITATION 10 7 6 8 3 0 0 0 1 4 6 13 58 GREATEST DAILY PRECIPITATION 44.0 4.6 23.0 9.0 2.0 0.0 0.0 0.0 0.3 6.0 17.0 41.0 44.0 DAY 6 7 24 21 8 ** ** ** 29 16 19 11 DAY WITH THUNDER STORM 2 1 2 5 1 0 0 0 1 1 2 3 18 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 1 2 DAYS WITH DUST 0 0 0 4 11 14 13 7 4 0 0 2 55 WIND DIRECTION (PREVAILING) 180 225 180 180 315 270 135 315 315 270 135 135 270 PREVAILING WIND SPEED(KNOTS) 10.4 10.4 7.6 10.3 6.8 6.9 11.6 8.6 6.4 5.8 8.8 10.8 7.0 PREVAILING WIND PERCENT 5.6 4.7 4.0 7.9 8.1 9.2 5.2 6.5 4.6 7.3 10.4 5.2 4.8 CALMS PERCENT OF WIND 86.7 80.6 82.3 75.0 76.2 72.1 74.2 82.3 83.3 76.6 67.9 75.8 77.8 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 205 233 271 203 284 287 326 317 286 171 151 176 237 VECTOR WIND MAGNITUDE(KNOTS) 1.2 0.8 0.5 0.9 1.1 0.7 0.1 0.9 0.2 0.1 0.9 0.7 0.4 WIND STEADINESES (MEAN %) 85.7 47.1 33.3 39.1 57.9 31.8 4.0 69.2 16.7 6.3 34.6 35.0 21.1 WIND SPEED (MEAN KNOTS) 1.4 1.7 1.5 2.3 1.9 2.2 2.5 1.3 1.2 1.6 2.6 2.0 1.9 FASTEST WIND DIRECTION 210 170 20 290 210 140 130 320 160 360 120 210 210 FASTEST WIND SPEED (KNOTS) 43 27 23 25 25 17 19 16 19 17 27 27 43 DAY 19 13 18 20 3 13 30 15 29 16 17 20 DAYS WITH SKY CLEAR (0-2)/8 15 18 20 12 26 30 26 30 28 24 17 6 252 DAYS WITH P.CLOUDY (3-6)/8 10 8 7 11 4 0 5 1 2 5 10 16 79 DAYS WITH CLOUDY (7-8)/8 6 3 4 7 1 0 0 0 0 2 3 9 35 DAYS WITH VISIBILITY =< 2 KM 1 0 1 4 4 3 8 0 1 0 0 1 23 DURATION OF SUNSHINE HOURS 181.1 228.1 250.3 200.9 311.1 345.1 293.3 346.5 300.9 270.3 216.8 146.5 3090.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 957.3 957.8 955.4 953.2 950.2 945.4 942.4 944.8 948.8 954.9 958.0 958.6 952.2 MAX. QFE PRESSURE IN HPA 969.0 964.5 963.3 959.0 956.3 948.9 947.8 948.1 955.2 961.5 963.6 966.5 969.0 DAY-HOUR 30- 6 29- 6 3- 9 12- 9 2- 9 17- 6 31- 0 13-21 30- 6 29- 6 11- 6 17- 6 MIN. QFE PRESSURE IN HPA 947.1 947.1 940.1 946.9 944.8 941.5 936.6 938.7 942.1 949.8 952.4 949.5 936.6 DAY-HOUR 28-12 6-12 24- 9 14-15 25-12 27-15 12-15 11-15 2-12 1-15 6-12 11- 0 MEAN QNH PRESSURE IN HPA 1021.2 1021.8 1019.2 1016.9 1013.7 1008.7 1005.5 1008.1 1012.3 1018.6 1022.0 1022.6 1015.9 MAX. QNH PRESSURE IN HPA 1033.5 1028.8 1027.5 1023.0 1020.2 1012.4 1011.2 1011.5 1019.0 1025.6 1027.9 1030.9 1033.5 DAY-HOUR 30- 6 29- 6 3- 9 12- 9 2- 9 17- 6 31- 0 13-21 30- 6 29- 6 11- 6 17- 6 MIN. QNH PRESSURE IN HPA 1010.5 1010.5 1003.1 1010.2 1008.0 1004.6 999.4 1001.6 1005.2 1013.3 1016.0 1013.0 999.4 DAY-HOUR 28-12 6-12 24- 9 14-15 25-12 27-15 12-15 11-15 2-12 1-15 6-12 11- 0 MEAN QFF PRESSURE IN HPA 1022.3 1022.7 1019.2 1014.9 1010.7 1004.7 1000.3 1003.4 1008.9 1016.8 1021.6 1023.1 1014.0 MAX. QFF PRESSURE IN HPA 1036.1 1030.2 1028.3 1022.3 1018.2 1008.5 1005.6 1006.7 1015.9 1025.3 1028.4 1032.3 1036.1 DAY-HOUR 30- 6 29- 6 3- 9 11- 3 2- 9 17- 0 30-21 8- 3 30- 6 29- 6 28- 6 17- 6 MIN. QFF PRESSURE IN HPA 1010.7 1011.5 1001.7 1006.6 1004.4 1000.5 993.3 996.7 1001.8 1011.2 1015.1 1013.4 993.3 DAY-HOUR 28-12 6-12 24- 9 14-15 25-12 25-12 13-12 11-15 2-12 2- 0 6-12 11- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 957.3 958.2 955.7 953.3 950.5 945.6 942.5 944.9 948.6 954.8 958.1 958.6 952.3 MAX. QFE PRESSURE IN HPA 966.6 963.8 961.0 957.9 954.5 948.8 947.8 947.6 952.8 961.1 962.5 965.5 966.6 DAY 30 1 1 11 10 17 31 14 30 29 27 18 MIN. QFE PRESSURE IN HPA 948.7 949.8 943.7 947.9 946.6 942.6 936.9 940.0 943.3 950.0 954.0 949.5 936.9 DAY 28 7 24 29 25 25 13 12 3 2 7 11 MEAN QNH PRESSURE IN HPA 1021.2 1022.2 1019.5 1017.0 1014.0 1008.9 1005.6 1008.2 1012.1 1018.6 1022.1 1022.6 1016.0 MAX. QNH PRESSURE IN HPA 1031.0 1028.1 1025.1 1021.8 1018.3 1012.3 1011.2 1011.0 1016.5 1025.2 1026.7 1029.9 1031.0 DAY 30 1 1 11 10 17 31 14 30 29 27 18 MIN. QNH PRESSURE IN HPA 1012.1 1013.3 1006.9 1011.3 1009.9 1005.7 999.7 1003.0 1006.5 1013.5 1017.7 1013.0 999.7 DAY 28 7 24 29 25 25 13 12 3 2 7 11 MEAN QFF PRESSURE IN HPA 1022.2 1022.9 1019.5 1014.8 1011.0 1004.8 1000.4 1003.4 1008.5 1016.5 1021.5 1022.9 1014.0 MAX. QFF PRESSURE IN HPA 1033.0 1029.6 1026.2 1021.5 1016.2 1008.5 1005.4 1005.9 1013.0 1024.6 1027.0 1030.7 1033.0 DAY 30 1 10 11 2 17 31 8 30 29 27 18 MIN. QFF PRESSURE IN HPA 1012.5 1013.7 1004.9 1007.3 1006.3 1001.3 993.7 997.8 1003.1 1011.2 1016.0 1013.4 993.7 DAY 28 7 24 29 26 25 13 12 3 2 7 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 956.9 957.7 955.5 953.2 950.6 945.8 942.8 945.2 949.0 955.1 958.0 958.4 952.4 MAX. QFE PRESSURE IN HPA 967.4 963.7 961.1 958.2 955.1 948.4 947.6 947.8 953.9 960.8 962.5 965.6 967.4 DAY 30 29 3 11 2 17 31 14 30 29 27 17 MIN. QFE PRESSURE IN HPA 948.1 948.1 941.6 947.2 946.0 942.6 937.4 940.2 943.3 950.2 954.2 950.0 937.4 DAY 28 7 24 21 19 25 13 11 3 2 2 11 MEAN QNH PRESSURE IN HPA 1020.8 1021.6 1019.4 1016.9 1014.1 1009.1 1005.9 1008.4 1012.4 1018.9 1022.0 1022.3 1016.0 MAX. QNH PRESSURE IN HPA 1031.9 1028.0 1025.2 1022.2 1018.9 1011.8 1011.0 1011.2 1017.6 1024.9 1026.7 1030.0 1031.9 DAY 30 29 3 11 2 17 31 14 30 29 27 17 MIN. QNH PRESSURE IN HPA 1011.5 1011.5 1004.7 1010.6 1009.3 1005.7 1000.2 1003.2 1006.5 1013.7 1017.9 1013.5 1000.2 DAY 28 7 24 21 19 25 13 11 3 2 2 11 MEAN QFF PRESSURE IN HPA 1022.1 1022.7 1019.7 1015.1 1011.4 1005.3 1000.9 1004.0 1009.3 1017.4 1021.9 1023.1 1014.4 MAX. QFF PRESSURE IN HPA 1034.5 1029.8 1026.8 1022.3 1017.3 1008.3 1005.0 1006.7 1014.8 1024.8 1028.0 1031.4 1034.5 DAY 30 29 3 11 2 21 26 8 30 29 28 17 MIN. QFF PRESSURE IN HPA 1012.0 1012.4 1003.2 1008.3 1005.7 1001.7 994.4 998.3 1003.4 1011.7 1017.2 1014.1 994.4 DAY 28 7 24 21 19 25 13 11 3 2 7 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 957.8 958.6 956.1 954.1 951.1 946.0 943.2 945.6 949.7 956.0 958.8 959.3 953.0 MAX. QFE PRESSURE IN HPA 969.0 964.5 962.7 958.7 956.1 948.9 947.7 948.1 955.2 961.5 963.6 966.5 969.0 DAY 30 29 3 11 2 17 30 14 30 29 11 17 MIN. QFE PRESSURE IN HPA 948.8 949.6 940.4 949.0 946.2 942.8 938.5 941.0 943.6 950.8 955.0 950.1 938.5 DAY 28 7 24 21 25 25 13 11 3 2 2 10 MEAN QNH PRESSURE IN HPA 1021.8 1022.6 1019.9 1017.8 1014.6 1009.3 1006.3 1008.9 1013.3 1019.8 1022.8 1023.3 1016.7 MAX. QNH PRESSURE IN HPA 1033.5 1028.8 1026.9 1022.7 1019.9 1012.4 1011.1 1011.5 1019.0 1025.6 1027.9 1030.9 1033.5 DAY 30 29 3 11 2 17 30 14 30 29 11 17 MIN. QNH PRESSURE IN HPA 1012.3 1013.1 1003.4 1012.5 1009.5 1005.9 1001.4 1004.0 1006.8 1014.4 1018.8 1013.6 1001.4 DAY 28 7 24 21 25 25 13 11 3 2 2 10 MEAN QFF PRESSURE IN HPA 1023.2 1023.7 1020.1 1016.0 1011.5 1005.1 1001.1 1004.1 1009.9 1018.0 1022.6 1024.0 1014.9 MAX. QFF PRESSURE IN HPA 1036.1 1030.2 1028.0 1022.2 1017.8 1008.1 1005.5 1006.5 1015.9 1025.3 1028.4 1032.3 1036.1 DAY 30 29 3 11 2 17 30 27 30 29 28 17 MIN. QFF PRESSURE IN HPA 1013.0 1014.4 1002.4 1010.1 1005.8 1001.7 995.8 998.8 1003.4 1012.1 1017.4 1013.5 995.8 DAY 28 7 24 9 25 26 13 11 3 2 7 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 957.4 958.1 955.7 954.1 950.6 945.7 942.7 945.1 949.2 955.1 958.0 958.8 952.5 MAX. QFE PRESSURE IN HPA 969.0 964.0 963.3 959.0 956.3 948.9 947.5 947.7 955.0 960.2 963.0 965.6 969.0 DAY 30 29 3 12 2 17 30 14 29 28 28 17 MIN. QFE PRESSURE IN HPA 948.6 950.3 940.1 948.2 945.2 942.6 938.3 940.1 943.1 950.7 954.3 951.9 938.3 DAY 28 7 24 9 25 25 13 11 2 2 7 11 MEAN QNH PRESSURE IN HPA 1021.3 1022.1 1019.5 1017.8 1014.2 1009.0 1005.9 1008.4 1012.7 1018.9 1022.0 1022.8 1016.2 MAX. QNH PRESSURE IN HPA 1033.5 1028.3 1027.5 1023.0 1020.2 1012.4 1010.9 1011.1 1018.8 1024.3 1027.2 1030.0 1033.5 DAY 30 29 3 12 2 17 30 14 29 28 28 17 MIN. QNH PRESSURE IN HPA 1012.0 1013.8 1003.1 1011.6 1008.5 1005.7 1001.2 1003.1 1006.2 1014.3 1018.0 1015.5 1001.2 DAY 28 7 24 9 25 25 13 11 2 2 7 11 MEAN QFF PRESSURE IN HPA 1022.3 1022.8 1019.4 1015.7 1011.0 1004.9 1000.6 1003.6 1009.1 1016.9 1021.3 1023.1 1014.2 MAX. QFF PRESSURE IN HPA 1035.5 1029.7 1028.3 1021.9 1018.2 1008.4 1005.3 1006.1 1015.4 1023.4 1027.7 1030.8 1035.5 DAY 30 29 3 12 2 17 31 31 29 29 28 17 MIN. QFF PRESSURE IN HPA 1012.2 1014.6 1001.7 1008.8 1004.7 1001.4 995.5 997.8 1002.9 1012.0 1016.2 1015.4 995.5 DAY 28 13 24 9 25 25 13 11 2 2 7 11 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 956.3 956.6 954.5 952.6 949.5 944.8 941.7 944.1 948.1 954.0 957.0 957.8 951.4 MAX. QFE PRESSURE IN HPA 967.1 962.3 961.4 956.9 954.1 947.6 946.4 946.6 953.4 959.9 962.1 964.4 967.1 DAY 30 29 3 10 6 17 30 14 30 28 28 17 MIN. QFE PRESSURE IN HPA 947.1 947.1 944.9 947.0 944.8 941.6 936.7 939.0 942.1 950.2 952.4 951.8 936.7 DAY 28 6 23 20 25 27 13 11 2 2 6 14 MEAN QNH PRESSURE IN HPA 1020.2 1020.5 1018.3 1016.3 1013.0 1008.0 1004.7 1007.3 1011.5 1017.8 1020.9 1021.7 1015.0 MAX. QNH PRESSURE IN HPA 1031.5 1026.5 1025.5 1020.8 1017.8 1011.0 1009.7 1009.9 1017.1 1024.0 1026.3 1028.7 1031.5 DAY 30 29 3 10 6 17 30 14 30 28 28 17 MIN. QNH PRESSURE IN HPA 1010.5 1010.5 1008.1 1010.4 1008.0 1004.7 999.5 1001.9 1005.2 1013.7 1016.0 1015.4 999.5 DAY 28 6 23 20 25 27 13 11 2 2 6 14 MEAN QFF PRESSURE IN HPA 1021.2 1021.2 1018.2 1014.1 1010.0 1004.0 999.5 1002.6 1008.0 1015.7 1020.3 1022.0 1013.1 MAX. QFF PRESSURE IN HPA 1033.3 1027.8 1026.3 1020.1 1015.8 1007.3 1004.1 1005.4 1013.7 1023.1 1026.5 1029.5 1033.3 DAY 30 29 3 11 10 17 30 31 30 28 28 17 MIN. QFF PRESSURE IN HPA 1010.7 1011.5 1006.6 1006.8 1004.4 1000.5 993.3 996.9 1001.8 1011.5 1015.1 1015.7 993.3 DAY 28 6 23 14 25 25 13 11 2 2 6 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 956.9 957.1 954.6 952.1 949.0 944.4 941.2 943.7 948.0 954.1 957.6 958.4 951.4 MAX. QFE PRESSURE IN HPA 967.1 962.5 961.7 956.9 953.3 947.6 945.6 945.9 953.5 959.7 962.2 965.1 967.1 DAY 30 10 3 11 6 20 30 14 30 28 28 17 MIN. QFE PRESSURE IN HPA 948.1 948.2 942.9 946.9 944.8 941.5 936.6 938.7 942.2 949.8 952.6 952.3 936.6 DAY 28 6 23 14 25 27 12 11 2 1 6 14 MEAN QNH PRESSURE IN HPA 1020.8 1021.0 1018.4 1015.8 1012.5 1007.7 1004.2 1006.9 1011.4 1017.8 1021.6 1022.4 1015.0 MAX. QNH PRESSURE IN HPA 1031.5 1026.7 1025.9 1020.8 1017.0 1011.0 1008.9 1009.2 1017.2 1023.7 1026.4 1029.4 1031.5 DAY 30 10 3 11 6 20 30 14 30 28 28 17 MIN. QNH PRESSURE IN HPA 1011.5 1011.6 1006.0 1010.2 1008.0 1004.6 999.4 1001.6 1005.3 1013.3 1016.3 1015.9 999.4 DAY 28 6 23 14 25 27 12 11 2 1 6 14 MEAN QFF PRESSURE IN HPA 1022.1 1022.1 1018.7 1013.9 1009.7 1003.9 999.2 1002.6 1008.3 1016.3 1021.5 1023.1 1013.4 MAX. QFF PRESSURE IN HPA 1033.7 1028.4 1027.0 1020.7 1015.3 1007.1 1003.0 1005.4 1014.7 1023.5 1027.6 1030.8 1033.7 DAY 30 10 3 11 10 20 26 31 30 28 28 17 MIN. QFF PRESSURE IN HPA 1012.2 1013.1 1004.4 1006.6 1004.8 1000.7 994.0 996.7 1002.3 1011.4 1015.9 1016.5 994.0 DAY 28 13 23 14 25 27 13 11 2 1 6 14 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 957.7 958.2 955.4 953.1 950.0 945.5 942.4 945.0 949.1 954.9 958.4 959.0 952.4 MAX. QFE PRESSURE IN HPA 968.2 963.5 961.8 958.5 954.1 948.5 946.6 947.4 953.8 961.1 962.5 965.7 968.2 DAY 30 10 3 11 10 20 30 13 30 28 27 17 MIN. QFE PRESSURE IN HPA 949.4 948.4 943.4 947.9 946.0 942.7 937.4 940.0 944.0 951.1 953.7 952.7 937.4 DAY 28 6 23 28 25 27 12 11 2 1 6 14 MEAN QNH PRESSURE IN HPA 1021.6 1022.1 1019.3 1016.8 1013.5 1008.7 1005.5 1008.2 1012.6 1018.6 1022.3 1023.0 1016.0 MAX. QNH PRESSURE IN HPA 1032.7 1027.7 1026.0 1022.5 1017.8 1011.9 1009.9 1010.8 1017.5 1025.2 1026.7 1030.1 1032.7 DAY 30 10 3 11 10 20 30 13 30 28 27 17 MIN. QNH PRESSURE IN HPA 1012.9 1011.8 1006.6 1011.3 1009.3 1005.8 1000.2 1003.0 1007.2 1014.7 1017.4 1016.4 1000.2 DAY 28 6 23 28 25 27 12 11 2 1 6 14 MEAN QFF PRESSURE IN HPA 1023.0 1023.2 1019.4 1014.9 1010.3 1004.5 1000.2 1003.4 1009.2 1016.9 1022.1 1023.8 1014.2 MAX. QFF PRESSURE IN HPA 1035.0 1029.6 1027.1 1022.2 1015.7 1007.7 1004.1 1006.2 1014.9 1024.9 1027.7 1031.5 1035.0 DAY 30 10 3 11 10 20 30 29 30 28 27 17 MIN. QFF PRESSURE IN HPA 1013.6 1013.3 1004.6 1008.1 1004.9 1001.6 995.0 998.0 1003.9 1012.6 1016.3 1017.0 995.0 DAY 28 6 23 28 25 27 12 11 2 1 6 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 957.8 958.2 955.7 953.1 950.6 945.8 942.9 945.2 949.1 955.0 958.4 958.8 952.6 MAX. QFE PRESSURE IN HPA 967.8 963.8 961.2 958.0 955.0 948.7 947.6 948.1 953.5 961.1 962.5 965.7 967.8 DAY 30 28 3 1 9 16 30 13 30 28 26 17 MIN. QFE PRESSURE IN HPA 949.1 949.1 943.9 948.5 946.9 943.1 937.9 940.0 943.5 950.8 954.1 951.2 937.9 DAY 27 6 23 14 24 24 12 11 2 1 6 10 MEAN QNH PRESSURE IN HPA 1021.8 1022.2 1019.5 1016.8 1014.2 1009.1 1006.0 1008.5 1012.6 1018.8 1022.4 1022.8 1016.2 MAX. QNH PRESSURE IN HPA 1032.3 1028.1 1025.3 1021.9 1018.8 1012.1 1011.0 1011.5 1017.2 1025.2 1026.7 1030.1 1032.3 DAY 30 28 3 1 9 16 30 13 30 28 26 17 MIN. QNH PRESSURE IN HPA 1012.6 1012.6 1007.1 1011.9 1010.2 1006.2 1000.8 1003.0 1006.7 1014.4 1017.8 1014.8 1000.8 DAY 27 6 23 14 24 24 12 11 2 1 6 10 MEAN QFF PRESSURE IN HPA 1022.7 1022.9 1019.3 1014.7 1011.0 1004.9 1000.7 1003.7 1009.0 1016.7 1021.7 1023.1 1014.2 MAX. QFF PRESSURE IN HPA 1033.8 1029.3 1026.3 1021.6 1016.5 1008.2 1005.6 1005.9 1014.2 1024.5 1026.8 1031.0 1033.8 DAY 30 28 9 10 9 20 30 26 30 28 27 17 MIN. QFF PRESSURE IN HPA 1012.7 1012.9 1004.9 1008.5 1006.3 1001.8 995.3 997.7 1003.3 1012.1 1016.0 1015.0 995.3 DAY 27 6 23 19 25 24 12 11 2 1 6 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.1 9.4 15.0 18.2 23.8 30.0 33.1 33.0 28.5 22.6 13.9 11.2 20.6 MINIMUN AIR TEMPERATURE (C) 2.2 3.1 7.9 9.7 12.7 18.4 22.2 22.4 18.8 14.5 6.9 6.6 12.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 4 17 22 4 1 0 0 48 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 4 3 0 0 0 0 0 0 0 0 2 2 11 TEMPERATURE RECORDS LOWEST(C) -3.0 -2.4 2.8 5.0 8.6 14.6 17.8 18.4 15.6 7.4 -0.8 -2.0 -3.0 DAY 29 1 1 16 10 2 4 24 3 31 24 22 MAXIMUM AIR TEMPERATURE (C) 15.5 16.3 22.7 27.2 33.3 39.5 42.5 43.1 38.1 31.8 22.1 16.8 29.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 9 25 30 31 31 30 19 3 0 178 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.6 23.2 29.0 33.0 39.8 43.8 47.2 47.0 41.6 37.4 32.8 22.8 47.2 DAY 9 28 30 30 28 22 24 4 4 4 5 29 DIF. BETWEEN (MAX.-MIN.) (C) 13.3 13.2 14.8 17.5 20.6 21.1 20.3 20.7 19.3 17.3 15.2 10.2 17.0 MEAN DAILY TEMP. (MDT) (C) 8.9 9.7 15.3 18.5 23.0 29.0 32.3 32.7 28.5 23.2 14.5 11.7 20.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 9.4 71.3 239.1 351.5 363.7 224.1 79.3 8.8 0.0 1347.3 HEATING DEG. DAYS(BASE 18 0C) 283.1 232.8 87.4 27.2 0.0 0.0 0.0 0.0 0.0 2.4 128.2 196.1 957.2 DEWPOINT (MEAN C) 1.4 2.7 7.3 8.3 6.3 5.7 7.7 8.3 6.1 6.4 5.1 7.7 6.1 MIXING RATIO (G/KG) 4.49 4.94 6.89 7.39 6.47 6.16 7.15 7.54 6.30 6.45 5.87 7.06 6.39 VAPOUR PRESSURE (HPA) 6.87 7.55 10.45 11.18 9.77 9.27 10.70 11.32 9.53 9.79 8.95 10.76 9.68 SATURATION DEF. (HPA) 4.48 4.78 7.58 11.39 22.47 36.55 43.82 43.27 32.14 19.58 8.47 2.97 19.79 RELATIVE HUMIDITY (MEAN %) 66 66 64 58 38 25 23 25 27 39 60 81 48 RELATIVE HUMIDITY (MAX. %) 88 88 87 83 65 42 38 42 45 58 78 94 67 RELATIVE HUMIDITY (MIN. %) 38 42 38 31 17 12 12 12 12 21 37 60 28 RELATIVE HUMIDITY (MEAN% 03UTC) 85 82 81 81 59 39 36 39 43 53 74 90 64 RELATIVE HUMIDITY (MEAN% 09UTC) 45 46 44 36 20 14 14 14 14 25 42 68 32 RELATIVE HUMIDITY (MEAN% 15UTC) 57 56 51 41 25 14 15 15 16 31 52 78 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 36.5 57.6 86.3 15.7 9.8 0.0 0.4 0.0 1.1 9.4 18.3 107.1 342.2 DAYS WITH PRECIPITATION >=10 1 3 4 1 0 0 0 0 0 0 1 2 12 DAYS WITH PRECIPITATION >= 5 2 5 5 2 1 0 0 0 0 1 1 5 22 DAYS WITH PRECIPITATION >= 1 5 7 6 2 2 0 0 0 1 2 1 8 34 DAYS WITH PRECIPITATION 10 9 8 4 3 0 1 0 2 5 5 15 62 GREATEST DAILY PRECIPITATION 21.0 16.0 31.0 10.0 7.8 0.0 0.4 0.0 1.0 6.0 17.0 50.0 50.0 DAY 26 15 24 8 2 ** 19 ** 23 28 18 1 DAY WITH THUNDER STORM 1 1 3 1 3 0 0 0 2 5 3 5 24 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 2 0 0 1 0 0 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 135 135 135 135 270 270 270 270 135 135 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.7 10.4 6.8 5.7 8.1 8.5 8.5 8.5 6.1 6.2 7.4 7.1 7.7 PREVAILING WIND PERCENT 6.9 10.3 8.1 9.2 10.9 13.3 17.7 14.5 11.7 11.7 10.0 5.2 10.0 CALMS PERCENT OF WIND 73.4 58.5 67.7 66.3 57.3 57.5 57.3 53.2 55.8 59.3 68.3 71.4 62.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 145 167 175 231 231 259 256 268 216 190 213 168 215 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.6 0.7 0.6 1.6 0.6 1.5 1.4 0.6 0.9 0.8 0.5 0.8 WIND STEADINESES (MEAN %) 39.1 40.0 30.4 27.3 40.0 14.3 42.9 37.8 18.2 29.0 36.4 21.7 25.8 WIND SPEED (MEAN KNOTS) 2.3 4.0 2.3 2.2 4.0 4.2 3.5 3.7 3.3 3.1 2.2 2.3 3.1 FASTEST WIND DIRECTION 120 120 100 240 220 120 280 140 180 140 170 100 120 FASTEST WIND SPEED (KNOTS) 27 39 27 31 31 27 31 23 37 21 19 29 39 DAY 9 9 24 8 11 13 7 13 22 2 22 4 DAYS WITH SKY CLEAR (0-2)/8 20 10 16 14 20 30 30 30 28 23 18 11 250 DAYS WITH P.CLOUDY (3-6)/8 6 12 9 12 9 0 1 1 2 7 10 12 81 DAYS WITH CLOUDY (7-8)/8 5 6 6 4 2 0 0 0 0 1 2 8 34 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 0 0 DURATION OF SUNSHINE HOURS 235.5 190.5 246.4 261.6 316.8 384.6 381.9 364.8 313.3 288.3 218.4 157.0 3359.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 959.1 957.2 954.4 953.5 949.2 944.8 942.3 945.9 949.8 954.2 957.6 959.3 952.3 MAX. QFE PRESSURE IN HPA 965.1 962.5 963.0 961.7 954.9 951.0 946.1 951.4 954.9 959.4 964.6 965.8 965.8 DAY-HOUR 30- 6 28- 6 4- 9 1- 6 16-18 1- 6 2- 6 20-21 23- 6 31-21 14- 6 22- 6 MIN. QFE PRESSURE IN HPA 949.1 944.6 940.0 947.2 939.8 939.1 937.4 942.7 945.4 948.7 943.1 948.6 937.4 DAY-HOUR 3-12 14-12 24-15 25-15 2-15 16-15 17-15 29- 9 4-15 25-12 18- 3 4-18 MEAN QNH PRESSURE IN HPA 1023.1 1021.1 1018.1 1017.2 1012.6 1008.1 1005.4 1009.2 1013.3 1018.0 1021.6 1023.4 1015.9 MAX. QNH PRESSURE IN HPA 1029.4 1026.7 1027.2 1025.9 1018.7 1014.6 1009.4 1015.0 1018.7 1023.4 1028.9 1030.2 1030.2 DAY-HOUR 30- 6 28- 6 4- 9 1- 6 16-18 1- 6 2- 6 20-21 23- 6 31-21 14- 6 22- 6 MIN. QNH PRESSURE IN HPA 1012.6 1007.8 1003.0 1010.6 1002.8 1002.0 1000.2 1005.8 1008.7 1012.1 1006.2 1012.0 1000.2 DAY-HOUR 3-12 14-12 24-15 25-15 2-15 16-15 17-15 29- 9 4-15 25-12 18- 3 4-18 MEAN QFF PRESSURE IN HPA 1024.1 1021.7 1017.4 1015.6 1009.9 1004.1 1000.7 1004.5 1009.6 1015.5 1021.1 1023.5 1014.0 MAX. QFF PRESSURE IN HPA 1031.7 1027.3 1027.4 1024.6 1016.1 1011.3 1005.1 1010.5 1014.7 1022.6 1030.8 1032.7 1032.7 DAY-HOUR 30- 6 28- 6 1- 6 1- 6 17-21 1- 9 2- 6 20-21 23- 6 31-21 20- 6 22- 6 MIN. QFF PRESSURE IN HPA 1012.9 1007.6 1001.3 1008.3 999.9 997.6 995.7 1000.9 1004.8 1009.3 1004.8 1011.4 995.7 DAY-HOUR 3-12 14-12 24-15 25-12 2-15 16-15 18- 0 12-15 4-12 1- 0 18- 0 4-18 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 959.2 957.2 954.2 953.4 949.1 944.9 942.3 945.7 949.6 954.0 957.6 959.3 952.2 MAX. QFE PRESSURE IN HPA 963.9 962.0 961.3 959.8 954.1 950.0 945.1 950.0 953.6 957.2 964.0 965.3 965.3 DAY 30 25 4 2 18 1 28 21 23 31 20 23 MIN. QFE PRESSURE IN HPA 952.9 947.9 942.4 949.2 943.5 940.0 937.5 943.1 946.1 949.8 943.2 951.1 937.5 DAY 3 21 25 26 3 16 18 25 5 1 18 5 MEAN QNH PRESSURE IN HPA 1023.3 1021.1 1018.0 1017.1 1012.6 1008.1 1005.4 1009.0 1013.1 1017.8 1021.6 1023.4 1015.9 MAX. QNH PRESSURE IN HPA 1028.2 1026.2 1025.4 1023.8 1017.8 1013.5 1008.4 1013.5 1017.3 1021.1 1028.3 1029.6 1029.6 DAY 30 25 4 2 18 1 28 21 23 31 20 23 MIN. QNH PRESSURE IN HPA 1016.6 1011.3 1005.5 1012.7 1006.7 1003.0 1000.3 1006.2 1009.4 1013.3 1006.3 1014.7 1000.3 DAY 3 21 25 26 3 16 18 25 5 1 18 5 MEAN QFF PRESSURE IN HPA 1023.9 1021.6 1017.1 1015.5 1009.9 1004.2 1000.8 1004.2 1009.3 1015.1 1020.9 1023.3 1013.8 MAX. QFF PRESSURE IN HPA 1029.9 1026.7 1025.0 1022.1 1015.8 1010.6 1003.9 1009.2 1013.0 1019.6 1029.8 1031.0 1031.0 DAY 30 25 4 2 18 1 2 21 23 31 20 22 MIN. QFF PRESSURE IN HPA 1016.7 1010.7 1005.1 1010.4 1003.8 998.4 995.7 1001.0 1005.1 1009.3 1004.8 1014.6 995.7 DAY 3 21 25 26 30 16 18 1 5 1 18 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 959.0 957.2 954.4 953.4 949.2 945.0 942.4 945.9 949.8 954.2 957.6 959.4 952.3 MAX. QFE PRESSURE IN HPA 963.9 961.1 962.0 959.8 953.9 950.7 945.4 949.6 953.6 957.3 964.2 965.1 965.1 DAY 30 16 1 1 17 1 2 21 23 24 20 23 MIN. QFE PRESSURE IN HPA 951.4 948.3 942.1 949.0 944.1 940.3 938.1 942.9 946.8 950.4 943.1 951.7 938.1 DAY 26 21 25 26 3 16 18 25 5 1 18 5 MEAN QNH PRESSURE IN HPA 1023.0 1021.1 1018.2 1017.1 1012.6 1008.3 1005.5 1009.2 1013.3 1017.9 1021.5 1023.5 1015.9 MAX. QNH PRESSURE IN HPA 1028.2 1025.2 1026.2 1023.8 1017.6 1014.3 1008.7 1013.1 1017.3 1021.2 1028.5 1029.4 1029.4 DAY 30 16 1 1 17 1 2 21 23 24 20 23 MIN. QNH PRESSURE IN HPA 1015.0 1011.7 1005.2 1012.5 1007.3 1003.3 1001.0 1006.0 1010.1 1013.9 1006.2 1015.3 1001.0 DAY 26 21 25 26 3 16 18 25 5 1 18 5 MEAN QFF PRESSURE IN HPA 1024.2 1022.0 1017.6 1015.8 1010.2 1004.5 1001.1 1004.7 1009.9 1015.7 1021.3 1023.8 1014.2 MAX. QFF PRESSURE IN HPA 1030.4 1025.9 1026.4 1022.7 1015.6 1011.3 1004.6 1009.2 1013.1 1020.6 1030.5 1031.3 1031.3 DAY 30 13 1 1 17 1 2 21 23 31 20 22 MIN. QFF PRESSURE IN HPA 1016.2 1012.0 1004.6 1011.0 1003.5 998.6 996.9 1001.9 1006.1 1010.5 1005.2 1015.5 996.9 DAY 26 21 25 26 29 16 18 1 20 1 18 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 959.9 958.0 955.3 954.1 949.7 945.5 943.0 946.6 950.7 955.2 958.6 960.1 953.1 MAX. QFE PRESSURE IN HPA 965.1 962.5 962.9 961.7 954.5 951.0 946.1 950.6 954.9 958.5 964.6 965.8 965.8 DAY 30 28 1 1 18 1 2 21 23 31 14 22 MIN. QFE PRESSURE IN HPA 952.1 949.0 943.1 950.5 944.0 940.4 938.3 943.8 947.8 950.9 944.0 951.1 938.3 DAY 26 21 25 25 29 16 18 29 4 1 18 4 MEAN QNH PRESSURE IN HPA 1023.9 1022.0 1019.1 1017.9 1013.2 1008.8 1006.1 1010.0 1014.2 1019.0 1022.6 1024.1 1016.7 MAX. QNH PRESSURE IN HPA 1029.4 1026.7 1027.1 1025.9 1018.3 1014.6 1009.4 1014.2 1018.7 1022.5 1028.9 1030.2 1030.2 DAY 30 28 1 1 18 1 2 21 23 31 14 22 MIN. QNH PRESSURE IN HPA 1015.7 1012.5 1006.2 1014.0 1007.2 1003.4 1001.2 1007.0 1011.2 1014.5 1007.2 1014.7 1001.2 DAY 26 21 25 25 29 16 18 29 4 1 18 4 MEAN QFF PRESSURE IN HPA 1025.2 1022.9 1018.5 1016.3 1010.3 1004.5 1001.2 1005.2 1010.5 1016.7 1022.4 1024.5 1014.9 MAX. QFF PRESSURE IN HPA 1031.7 1027.3 1027.4 1024.6 1015.8 1011.2 1005.1 1009.6 1014.7 1021.3 1030.8 1032.7 1032.7 DAY 30 28 1 1 18 1 2 21 23 31 20 22 MIN. QFF PRESSURE IN HPA 1017.0 1012.8 1005.6 1011.0 1002.8 998.5 996.6 1002.2 1006.8 1011.8 1007.0 1014.0 996.6 DAY 3 21 24 25 29 16 18 1 5 1 18 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 959.4 957.6 954.9 954.1 949.6 945.3 942.6 946.4 950.3 954.6 957.9 959.7 952.7 MAX. QFE PRESSURE IN HPA 964.9 962.0 963.0 960.8 954.5 950.9 945.1 949.9 953.8 958.3 964.4 965.5 965.5 DAY 30 16 4 1 17 1 2 21 23 31 20 22 MIN. QFE PRESSURE IN HPA 952.0 950.1 942.8 949.3 943.1 940.3 938.4 942.7 946.8 949.8 946.7 951.9 938.4 DAY 26 21 25 25 29 16 18 29 4 1 18 4 MEAN QNH PRESSURE IN HPA 1023.4 1021.6 1018.7 1017.8 1013.1 1008.6 1005.8 1009.7 1013.8 1018.3 1021.8 1023.7 1016.4 MAX. QNH PRESSURE IN HPA 1029.2 1026.2 1027.2 1024.9 1018.3 1014.5 1008.4 1013.4 1017.5 1022.3 1028.7 1029.9 1029.9 DAY 30 16 4 1 17 1 2 21 23 31 20 22 MIN. QNH PRESSURE IN HPA 1015.6 1013.6 1005.9 1012.8 1006.2 1003.3 1001.3 1005.8 1010.1 1013.3 1010.0 1015.5 1001.3 DAY 26 21 25 25 29 16 18 29 4 1 18 4 MEAN QFF PRESSURE IN HPA 1024.1 1022.0 1017.7 1016.1 1010.3 1004.6 1001.0 1004.9 1009.9 1015.7 1021.1 1023.6 1014.2 MAX. QFF PRESSURE IN HPA 1031.0 1026.3 1026.7 1022.9 1016.1 1011.3 1004.3 1009.2 1013.1 1021.0 1029.9 1031.3 1031.3 DAY 30 16 4 1 18 1 2 21 23 31 20 22 MIN. QFF PRESSURE IN HPA 1016.6 1014.0 1005.4 1010.2 1002.3 998.6 996.6 1001.3 1005.9 1010.4 1009.4 1015.0 996.6 DAY 3 21 24 25 29 16 18 29 4 1 17 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 958.1 956.1 953.7 953.0 948.5 944.3 941.8 945.4 949.2 953.4 956.9 958.6 951.6 MAX. QFE PRESSURE IN HPA 963.0 960.9 961.0 960.1 954.2 949.8 944.3 949.0 951.8 958.0 963.2 964.1 964.1 DAY 30 16 4 1 16 1 2 20 17 31 20 22 MIN. QFE PRESSURE IN HPA 949.1 944.6 943.0 947.3 940.0 939.9 937.9 942.9 945.6 948.7 945.1 950.1 937.9 DAY 3 14 25 25 2 16 18 25 4 25 17 4 MEAN QNH PRESSURE IN HPA 1022.1 1019.9 1017.4 1016.7 1011.9 1007.5 1004.8 1008.7 1012.6 1017.1 1020.8 1022.6 1015.2 MAX. QNH PRESSURE IN HPA 1027.2 1025.0 1025.1 1024.2 1017.9 1013.3 1007.5 1012.5 1015.4 1021.9 1027.4 1028.4 1028.4 DAY 30 16 4 1 16 1 2 20 17 31 20 22 MIN. QNH PRESSURE IN HPA 1012.6 1007.8 1006.1 1010.7 1003.0 1002.9 1000.8 1006.0 1008.9 1012.1 1008.4 1013.6 1000.8 DAY 3 14 25 25 2 16 18 25 4 25 17 4 MEAN QFF PRESSURE IN HPA 1022.7 1020.3 1016.5 1015.1 1009.3 1003.5 1000.2 1004.0 1008.9 1014.5 1020.1 1022.5 1013.1 MAX. QFF PRESSURE IN HPA 1028.8 1025.3 1024.7 1021.9 1015.2 1010.2 1003.5 1008.0 1011.7 1020.8 1028.5 1029.7 1029.7 DAY 30 16 4 1 16 1 2 21 8 31 20 22 MIN. QFF PRESSURE IN HPA 1012.9 1007.6 1005.8 1008.3 1000.4 998.4 996.1 1001.2 1004.8 1009.4 1007.3 1013.0 996.1 DAY 3 14 24 25 2 16 18 1 4 25 17 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 958.6 956.4 953.7 952.7 948.1 943.9 941.3 945.1 949.0 953.5 957.1 958.8 951.5 MAX. QFE PRESSURE IN HPA 963.6 961.6 960.6 959.4 954.0 949.2 944.1 949.0 951.8 958.0 963.4 964.9 964.9 DAY 30 10 4 1 16 1 27 20 8 31 19 22 MIN. QFE PRESSURE IN HPA 950.1 946.3 940.0 947.2 939.8 939.1 937.4 943.0 945.4 949.0 945.3 949.1 937.4 DAY 3 20 24 25 2 16 17 3 4 25 17 4 MEAN QNH PRESSURE IN HPA 1022.5 1020.3 1017.5 1016.3 1011.6 1007.1 1004.4 1008.4 1012.4 1017.2 1021.0 1022.8 1015.1 MAX. QNH PRESSURE IN HPA 1027.9 1025.7 1024.7 1023.4 1017.7 1012.7 1007.3 1012.5 1015.4 1021.9 1027.6 1029.2 1029.2 DAY 30 10 4 1 16 1 27 20 8 31 19 22 MIN. QNH PRESSURE IN HPA 1013.6 1009.6 1003.0 1010.6 1002.8 1002.0 1000.2 1006.1 1008.7 1012.5 1008.6 1012.6 1000.2 DAY 3 20 24 25 2 16 17 3 4 25 17 4 MEAN QFF PRESSURE IN HPA 1023.7 1021.1 1016.8 1015.1 1009.1 1003.3 999.9 1003.9 1009.0 1015.1 1020.8 1023.2 1013.4 MAX. QFF PRESSURE IN HPA 1029.8 1026.8 1024.8 1022.0 1015.5 1009.5 1003.2 1008.4 1012.3 1021.6 1029.4 1030.9 1030.9 DAY 30 10 4 1 16 1 2 20 8 31 19 21 MIN. QFF PRESSURE IN HPA 1014.2 1009.9 1001.3 1008.5 999.9 997.6 996.2 1000.9 1005.0 1010.1 1008.0 1011.9 996.2 DAY 3 20 24 25 2 16 17 12 4 25 17 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 959.4 957.3 954.5 953.5 949.3 944.8 942.4 946.1 949.8 954.4 957.8 959.4 952.4 MAX. QFE PRESSURE IN HPA 964.6 962.1 961.2 959.9 954.9 950.5 945.0 950.1 952.9 959.2 964.2 965.4 965.4 DAY 30 24 3 1 16 1 2 20 23 31 19 21 MIN. QFE PRESSURE IN HPA 952.2 945.8 944.9 947.8 943.0 940.7 938.2 943.9 946.1 950.2 945.8 948.6 938.2 DAY 3 20 24 25 29 15 17 12 4 25 17 4 MEAN QNH PRESSURE IN HPA 1023.4 1021.2 1018.3 1017.2 1012.8 1008.1 1005.6 1009.4 1013.3 1018.2 1021.8 1023.4 1016.0 MAX. QNH PRESSURE IN HPA 1028.9 1026.3 1025.3 1024.0 1018.7 1014.0 1008.2 1013.6 1016.6 1023.2 1028.5 1029.7 1029.7 DAY 30 24 3 1 16 1 2 20 23 31 19 21 MIN. QNH PRESSURE IN HPA 1015.8 1009.1 1008.1 1011.2 1006.1 1003.7 1001.1 1007.1 1009.4 1013.7 1009.1 1012.0 1001.1 DAY 3 20 24 25 29 15 17 12 4 25 17 4 MEAN QFF PRESSURE IN HPA 1024.7 1022.1 1017.7 1015.7 1009.8 1003.8 1000.6 1004.7 1009.6 1015.9 1021.6 1023.8 1014.1 MAX. QFF PRESSURE IN HPA 1031.0 1026.8 1025.2 1022.7 1016.1 1010.7 1003.7 1008.9 1012.9 1022.3 1030.4 1032.2 1032.2 DAY 30 24 4 1 16 1 2 20 8 31 19 21 MIN. QFF PRESSURE IN HPA 1015.8 1008.9 1006.8 1008.4 1001.6 998.9 996.3 1002.2 1005.0 1010.8 1008.6 1011.4 996.3 DAY 3 20 24 25 29 15 17 12 4 25 17 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 959.5 957.5 954.4 953.7 949.8 945.1 942.8 946.3 950.0 954.6 957.8 959.5 952.6 MAX. QFE PRESSURE IN HPA 964.3 961.8 961.2 960.0 954.5 950.7 945.4 951.4 954.0 959.4 964.2 965.4 965.4 DAY 29 24 3 1 17 1 27 20 8 31 19 21 MIN. QFE PRESSURE IN HPA 952.6 947.1 943.8 948.6 944.4 940.7 937.9 943.7 946.5 951.0 945.1 950.2 937.9 DAY 3 20 24 25 29 15 17 24 4 25 17 4 MEAN QNH PRESSURE IN HPA 1023.5 1021.4 1018.1 1017.4 1013.3 1008.4 1005.9 1009.6 1013.5 1018.4 1021.8 1023.6 1016.2 MAX. QNH PRESSURE IN HPA 1028.6 1026.0 1025.3 1024.1 1018.3 1014.3 1008.7 1015.0 1017.7 1023.4 1028.5 1029.7 1029.7 DAY 29 24 3 1 17 1 27 20 8 31 19 21 MIN. QNH PRESSURE IN HPA 1016.3 1010.5 1007.0 1012.0 1007.6 1003.7 1000.8 1006.9 1009.8 1014.6 1008.4 1013.7 1000.8 DAY 3 20 24 25 29 15 17 24 4 25 17 4 MEAN QFF PRESSURE IN HPA 1024.2 1021.8 1017.1 1015.7 1010.4 1004.3 1001.2 1004.8 1009.6 1015.8 1021.1 1023.5 1014.1 MAX. QFF PRESSURE IN HPA 1030.3 1026.4 1024.8 1022.5 1016.1 1011.0 1004.3 1010.5 1013.9 1022.6 1030.3 1031.5 1031.5 DAY 29 24 3 1 17 1 2 20 8 31 19 21 MIN. QFF PRESSURE IN HPA 1016.6 1009.7 1005.8 1009.4 1003.3 999.0 996.2 1001.9 1005.1 1011.0 1006.7 1013.2 996.2 DAY 3 20 24 25 29 15 17 12 4 25 17 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.5 10.0 13.8 16.7 23.2 30.2 33.2 31.3 28.0 23.6 15.2 8.7 20.1 MINIMUN AIR TEMPERATURE (C) 3.1 3.4 6.7 10.0 12.8 19.1 22.3 20.6 17.6 15.3 9.4 4.7 12.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 9 21 14 2 0 0 0 46 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 10 3 1 0 0 0 0 0 0 0 0 5 19 TEMPERATURE RECORDS LOWEST(C) -2.4 -2.0 -0.5 3.6 8.8 12.4 19.6 16.4 14.6 8.8 3.2 -2.6 -2.6 DAY 26 28 1 5 1 4 1 30 28 25 29 14 MAXIMUM AIR TEMPERATURE (C) 13.2 17.4 21.7 23.6 32.5 38.9 42.2 41.0 38.6 33.3 22.5 13.9 28.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 20 30 31 31 30 25 0 0 168 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.6 23.6 28.0 31.0 39.4 43.2 45.6 46.4 42.2 38.6 27.6 21.0 46.4 DAY 1 11 26 28 28 26 20 13 23 10 8 5 DIF. BETWEEN (MAX.-MIN.) (C) 10.1 14.0 15.0 13.6 19.7 19.8 19.9 20.4 21.0 18.0 13.1 9.2 16.1 MEAN DAILY TEMP. (MDT) (C) 8.1 10.4 14.2 16.8 22.6 29.0 32.2 30.8 28.1 24.3 15.9 9.3 20.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.7 67.1 239.6 348.3 303.8 212.2 108.6 0.0 0.0 1282.3 HEATING DEG. DAYS(BASE 18 0C) 306.1 212.1 119.1 59.7 0.0 0.0 0.0 0.0 0.0 0.0 68.9 269.4 1035.2 DEWPOINT (MEAN C) 3.0 2.8 5.3 9.9 7.4 4.7 9.3 6.1 6.3 6.0 6.5 4.7 6.0 MIXING RATIO (G/KG) 5.13 5.00 6.07 8.22 6.93 5.80 7.88 6.42 6.40 6.26 6.68 5.73 6.38 VAPOUR PRESSURE (HPA) 7.84 7.65 9.21 12.42 10.46 8.73 11.82 9.66 9.68 9.49 10.15 8.73 9.65 SATURATION DEF. (HPA) 2.93 5.26 7.69 7.58 20.80 37.80 42.70 39.50 31.22 21.80 7.85 2.98 19.01 RELATIVE HUMIDITY (MEAN %) 76 65 62 68 43 23 25 24 29 36 61 78 49 RELATIVE HUMIDITY (MAX. %) 92 88 84 91 71 42 42 42 49 52 81 93 69 RELATIVE HUMIDITY (MIN. %) 55 38 37 42 19 11 14 10 12 18 38 56 29 RELATIVE HUMIDITY (MEAN% 03UTC) 86 83 78 85 64 39 40 41 47 50 74 87 65 RELATIVE HUMIDITY (MEAN% 09UTC) 60 45 41 48 21 12 16 12 14 20 43 62 33 RELATIVE HUMIDITY (MEAN% 15UTC) 70 52 50 58 27 13 16 13 17 29 56 75 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 103.2 34.4 52.0 112.9 2.0 0.0 0.0 0.0 0.0 4.1 59.5 156.9 525.0 DAYS WITH PRECIPITATION >=10 5 1 3 5 0 0 0 0 0 0 2 6 22 DAYS WITH PRECIPITATION >= 5 7 1 5 7 0 0 0 0 0 0 4 8 32 DAYS WITH PRECIPITATION >= 1 12 3 8 12 1 0 0 0 0 1 6 11 54 DAYS WITH PRECIPITATION 14 6 9 16 4 0 0 0 0 2 6 13 70 GREATEST DAILY PRECIPITATION 29.0 30.6 12.0 42.0 1.0 0.0 0.0 0.0 0.0 4.0 30.4 37.1 42.0 DAY 29 13 17 19 4 ** ** ** ** 31 1 8 DAY WITH THUNDER STORM 1 1 3 9 3 0 0 0 0 1 1 5 24 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 1 0 1 2 WIND DIRECTION (PREVAILING) 180 135 135 135 270 270 270 270 270 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 11.0 9.9 9.0 8.4 7.1 8.5 8.0 8.6 7.4 5.9 8.1 12.4 8.0 PREVAILING WIND PERCENT 11.7 9.8 13.3 12.5 12.1 12.9 16.1 22.6 12.5 12.5 20.0 15.3 11.4 CALMS PERCENT OF WIND 62.1 65.6 54.8 58.8 57.7 45.8 53.2 52.0 54.2 62.5 55.4 49.2 55.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 182 172 167 173 214 220 269 272 287 212 114 170 204 VECTOR WIND MAGNITUDE(KNOTS) 1.3 1.2 1.5 1.3 1.4 1.5 1.3 2.1 1.1 0.6 1.0 2.3 1.0 WIND STEADINESES (MEAN %) 41.9 41.4 38.5 33.3 41.2 31.9 36.1 58.3 35.5 22.2 31.3 43.4 27.8 WIND SPEED (MEAN KNOTS) 3.1 2.9 3.9 3.9 3.4 4.7 3.6 3.6 3.1 2.7 3.2 5.3 3.6 FASTEST WIND DIRECTION 180 120 150 280 180 160 90 110 360 350 130 180 180 FASTEST WIND SPEED (KNOTS) 19 31 31 35 31 23 19 17 16 23 19 78 78 DAY 6 11 14 17 9 25 30 13 18 29 17 21 DAYS WITH SKY CLEAR (0-2)/8 14 17 16 5 18 30 31 31 29 18 19 8 236 DAYS WITH P.CLOUDY (3-6)/8 5 8 10 14 10 0 0 0 1 11 5 12 76 DAYS WITH CLOUDY (7-8)/8 12 3 5 11 3 0 0 0 0 2 6 11 53 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 1 0 2 3 DURATION OF SUNSHINE HOURS 161.1 209.2 233.4 170.8 329.9 371.1 384.5 372.4 322.7 246.2 220.8 107.7 3129.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 959.0 959.1 954.5 951.9 950.1 946.2 944.8 945.1 950.6 953.8 957.3 957.2 952.5 MAX. QFE PRESSURE IN HPA 966.6 968.6 963.7 958.1 956.2 953.5 947.9 951.1 954.9 958.1 963.0 966.4 968.6 DAY-HOUR 24-18 1- 9 11-21 1- 0 17- 6 7- 9 3- 6 30- 6 21- 6 7- 6 29- 6 14- 6 MIN. QFE PRESSURE IN HPA 949.0 947.0 944.5 945.1 944.7 941.8 939.1 938.8 946.1 949.1 951.0 942.9 938.8 DAY-HOUR 7-12 11-15 26-18 2-15 24- 0 26-15 23-15 14- 3 19- 0 29-12 12-15 21- 3 MEAN QNH PRESSURE IN HPA 1023.0 1023.1 1018.3 1015.6 1013.6 1009.5 1008.1 1008.4 1014.1 1017.6 1021.2 1021.1 1016.1 MAX. QNH PRESSURE IN HPA 1031.0 1033.1 1028.0 1022.1 1020.1 1017.2 1011.3 1014.7 1018.7 1022.1 1027.2 1030.8 1033.1 DAY-HOUR 24-18 1- 9 11-21 1- 0 17- 6 7- 9 3- 6 30- 6 21- 6 7- 6 29- 6 14- 6 MIN. QNH PRESSURE IN HPA 1012.5 1010.4 1007.7 1008.4 1007.9 1004.9 1002.0 1001.7 1009.4 1012.6 1014.6 1006.0 1001.7 DAY-HOUR 7-12 11-15 26-18 2-15 24- 0 26-15 23-15 14- 3 19- 0 29-12 12-15 21- 3 MEAN QFF PRESSURE IN HPA 1024.1 1023.6 1017.8 1014.3 1011.0 1005.4 1003.4 1004.1 1010.5 1014.9 1020.4 1021.9 1014.3 MAX. QFF PRESSURE IN HPA 1033.1 1034.8 1027.5 1022.1 1018.0 1014.3 1006.7 1011.2 1015.8 1020.1 1027.8 1033.5 1034.8 DAY-HOUR 24-18 2- 6 11- 6 1- 0 16-21 7- 9 27- 3 31- 3 21- 6 26- 6 29- 6 14- 6 MIN. QFF PRESSURE IN HPA 1011.4 1009.8 1005.6 1006.1 1004.0 999.3 997.3 996.6 1005.8 1010.0 1012.6 1005.4 996.6 DAY-HOUR 7-12 11-15 26-18 25- 3 24- 3 26-15 23-15 14- 3 19- 0 29-12 11-21 21- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 959.0 959.2 954.2 951.7 949.8 946.0 944.7 944.9 950.2 953.6 957.1 957.3 952.3 MAX. QFE PRESSURE IN HPA 965.9 967.6 962.4 958.1 955.3 952.5 947.1 950.2 953.0 957.0 961.2 966.0 967.6 DAY 25 2 12 1 17 7 1 30 16 7 19 14 MIN. QFE PRESSURE IN HPA 951.6 948.6 945.0 946.2 944.7 942.3 939.9 939.0 946.1 950.4 951.5 945.2 939.0 DAY 7 12 20 25 24 27 24 14 19 30 13 21 MEAN QNH PRESSURE IN HPA 1023.0 1023.2 1017.9 1015.3 1013.3 1009.3 1007.9 1008.1 1013.7 1017.3 1021.0 1021.2 1015.9 MAX. QNH PRESSURE IN HPA 1030.3 1032.1 1026.6 1022.1 1019.1 1016.2 1010.5 1013.7 1016.7 1020.9 1025.3 1030.4 1032.1 DAY 25 2 12 1 17 7 1 30 16 7 19 14 MIN. QNH PRESSURE IN HPA 1015.2 1012.0 1008.2 1009.5 1007.9 1005.4 1002.9 1001.9 1009.4 1013.9 1015.1 1008.5 1001.9 DAY 7 12 20 25 24 27 24 14 19 30 13 21 MEAN QFF PRESSURE IN HPA 1023.8 1023.5 1017.3 1014.0 1010.8 1005.4 1003.3 1003.8 1010.0 1014.5 1020.0 1021.8 1014.0 MAX. QFF PRESSURE IN HPA 1031.9 1033.3 1025.8 1022.1 1017.2 1013.2 1006.4 1010.0 1013.4 1018.5 1024.8 1033.0 1033.3 DAY 25 2 12 1 17 7 1 30 16 27 29 14 MIN. QFF PRESSURE IN HPA 1013.9 1010.6 1006.2 1006.9 1004.0 1000.6 997.9 996.8 1005.8 1011.1 1013.0 1007.6 996.8 DAY 7 12 20 25 24 27 24 14 19 1 12 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 958.7 959.1 954.4 951.8 950.0 946.2 945.0 945.1 950.7 953.9 957.4 956.9 952.4 MAX. QFE PRESSURE IN HPA 964.8 968.0 962.8 957.7 955.6 952.4 947.3 951.0 953.5 957.0 961.9 965.8 968.0 DAY 25 2 12 1 17 7 17 31 21 7 29 14 MIN. QFE PRESSURE IN HPA 951.1 949.6 945.0 945.4 945.0 941.9 940.5 938.8 948.4 950.5 952.0 942.9 938.8 DAY 7 12 20 25 24 19 24 14 26 21 13 21 MEAN QNH PRESSURE IN HPA 1022.6 1023.1 1018.1 1015.4 1013.5 1009.5 1008.2 1008.4 1014.3 1017.6 1021.3 1020.8 1016.1 MAX. QNH PRESSURE IN HPA 1029.1 1032.5 1027.0 1021.6 1019.4 1016.0 1010.7 1014.6 1017.2 1020.9 1026.1 1030.2 1032.5 DAY 25 2 12 1 17 7 17 31 21 7 29 14 MIN. QNH PRESSURE IN HPA 1014.7 1013.1 1008.2 1008.7 1008.2 1005.0 1003.5 1001.7 1011.8 1014.0 1015.6 1006.0 1001.7 DAY 7 12 20 25 24 19 24 14 26 21 13 21 MEAN QFF PRESSURE IN HPA 1023.9 1023.8 1017.9 1014.4 1011.1 1005.7 1003.8 1004.3 1011.0 1015.3 1020.8 1021.7 1014.5 MAX. QFF PRESSURE IN HPA 1031.2 1034.1 1026.8 1022.1 1017.7 1013.6 1006.7 1011.2 1014.2 1019.2 1026.8 1032.9 1034.1 DAY 25 2 12 1 17 7 27 31 29 26 29 14 MIN. QFF PRESSURE IN HPA 1013.8 1011.8 1006.5 1006.1 1004.0 1001.1 998.7 996.6 1007.5 1011.6 1015.2 1005.4 996.6 DAY 7 12 20 25 24 19 24 14 26 14 13 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 959.6 960.1 955.3 952.4 950.6 946.8 945.6 945.7 951.5 954.9 958.5 958.0 953.3 MAX. QFE PRESSURE IN HPA 966.0 968.3 963.2 958.0 956.2 953.0 947.9 951.1 954.9 958.1 963.0 966.4 968.3 DAY 25 1 12 1 17 7 3 30 21 7 29 14 MIN. QFE PRESSURE IN HPA 951.1 952.2 947.1 947.3 946.0 942.8 940.6 939.3 948.8 950.5 953.2 944.0 939.3 DAY 7 12 20 25 15 19 24 14 10 21 25 21 MEAN QNH PRESSURE IN HPA 1023.7 1024.2 1019.1 1016.1 1014.1 1010.2 1008.8 1009.0 1015.1 1018.7 1022.4 1021.9 1017.0 MAX. QNH PRESSURE IN HPA 1030.4 1032.8 1027.4 1021.9 1020.1 1016.7 1011.3 1014.7 1018.7 1022.1 1027.2 1030.8 1032.8 DAY 25 1 12 1 17 7 3 30 21 7 29 14 MIN. QNH PRESSURE IN HPA 1014.7 1015.8 1010.5 1010.7 1009.3 1005.9 1003.6 1002.2 1012.3 1014.0 1016.9 1007.2 1002.2 DAY 7 12 20 25 15 19 24 14 10 21 25 21 MEAN QFF PRESSURE IN HPA 1025.0 1025.0 1018.8 1014.9 1011.4 1005.9 1003.8 1004.6 1011.5 1016.2 1021.9 1022.9 1015.2 MAX. QFF PRESSURE IN HPA 1032.5 1034.8 1027.5 1021.7 1017.6 1013.5 1006.7 1011.0 1015.8 1020.1 1027.8 1033.5 1034.8 DAY 25 2 11 1 17 7 1 30 21 26 29 14 MIN. QFF PRESSURE IN HPA 1013.8 1014.6 1008.9 1008.7 1005.9 1001.2 998.4 997.0 1008.4 1011.6 1016.0 1006.6 997.0 DAY 7 12 20 25 19 27 24 14 26 21 25 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 959.2 959.6 955.1 952.3 950.5 946.7 945.2 945.4 951.1 954.2 957.6 957.4 952.8 MAX. QFE PRESSURE IN HPA 966.0 968.6 962.9 957.1 955.8 953.5 947.1 950.7 954.6 957.1 962.0 966.1 968.6 DAY 25 1 12 1 16 7 13 30 21 10 29 14 MIN. QFE PRESSURE IN HPA 949.7 953.0 947.1 947.6 946.6 942.7 940.8 939.3 948.3 949.8 952.8 944.0 939.3 DAY 7 11 20 2 15 10 23 14 10 21 25 21 MEAN QNH PRESSURE IN HPA 1023.2 1023.6 1018.9 1015.9 1014.1 1010.0 1008.5 1008.6 1014.7 1017.9 1021.5 1021.4 1016.5 MAX. QNH PRESSURE IN HPA 1030.4 1033.1 1027.1 1021.0 1019.6 1017.2 1010.5 1014.3 1018.4 1021.0 1026.2 1030.5 1033.1 DAY 25 1 12 1 16 7 13 30 21 10 29 14 MIN. QNH PRESSURE IN HPA 1013.2 1016.7 1010.5 1011.0 1009.9 1005.8 1003.8 1002.2 1011.7 1013.3 1016.5 1007.2 1002.2 DAY 7 11 20 2 15 10 23 14 10 21 25 21 MEAN QFF PRESSURE IN HPA 1024.1 1023.9 1018.2 1014.6 1011.4 1005.9 1003.6 1004.2 1010.9 1015.0 1020.4 1021.9 1014.5 MAX. QFF PRESSURE IN HPA 1031.7 1034.4 1026.7 1020.7 1017.4 1014.3 1006.0 1010.4 1014.7 1018.7 1026.0 1032.7 1034.4 DAY 25 1 12 1 17 7 2 29 21 26 29 14 MIN. QFF PRESSURE IN HPA 1012.2 1015.7 1008.8 1008.9 1006.5 1001.0 998.6 997.0 1008.4 1010.6 1015.5 1006.8 997.0 DAY 7 12 20 2 19 10 23 14 10 21 25 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 958.1 958.1 953.8 951.6 949.8 945.8 944.4 944.5 949.9 953.2 956.5 956.5 951.9 MAX. QFE PRESSURE IN HPA 965.0 967.4 961.6 955.8 955.2 952.0 946.6 950.1 952.5 956.6 960.7 965.0 967.4 DAY 24 1 11 15 16 7 5 30 20 26 18 14 MIN. QFE PRESSURE IN HPA 949.0 949.0 945.8 946.1 947.0 942.5 940.0 939.1 947.1 949.1 952.0 944.5 939.1 DAY 7 11 26 2 19 10 23 13 7 29 25 20 MEAN QNH PRESSURE IN HPA 1022.1 1022.1 1017.5 1015.2 1013.4 1009.1 1007.6 1007.7 1013.4 1016.8 1020.4 1020.4 1015.5 MAX. QNH PRESSURE IN HPA 1029.3 1031.9 1025.7 1019.6 1019.0 1015.6 1009.9 1013.6 1016.2 1020.5 1024.8 1029.3 1031.9 DAY 24 1 11 15 16 7 5 30 20 26 18 14 MIN. QNH PRESSURE IN HPA 1012.5 1012.5 1009.1 1009.4 1010.4 1005.6 1003.0 1002.0 1010.5 1012.6 1015.6 1007.7 1002.0 DAY 7 11 26 2 19 10 23 13 7 29 25 20 MEAN QFF PRESSURE IN HPA 1022.9 1022.3 1016.9 1013.8 1010.8 1005.2 1003.0 1003.4 1009.7 1014.0 1019.4 1021.0 1013.5 MAX. QFF PRESSURE IN HPA 1030.7 1033.1 1025.0 1018.6 1017.1 1012.9 1005.8 1010.0 1012.7 1018.7 1024.2 1031.4 1033.1 DAY 24 1 11 1 16 7 5 30 16 26 29 14 MIN. QFF PRESSURE IN HPA 1011.4 1011.8 1007.3 1007.0 1006.6 1000.9 997.8 997.1 1006.8 1010.0 1014.6 1007.8 997.1 DAY 7 11 26 2 28 26 23 13 7 29 12 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 958.7 958.2 953.9 951.2 949.4 945.3 943.9 944.3 949.8 953.3 956.7 956.9 951.8 MAX. QFE PRESSURE IN HPA 965.6 967.5 962.3 955.4 954.9 951.6 946.0 949.6 952.8 956.7 960.6 965.0 967.5 DAY 24 1 11 15 16 6 2 29 20 26 18 29 MIN. QFE PRESSURE IN HPA 951.5 947.0 945.4 945.1 946.1 941.8 939.1 938.9 946.9 949.2 951.0 943.3 938.9 DAY 6 11 26 2 28 26 23 13 18 29 12 20 MEAN QNH PRESSURE IN HPA 1022.6 1022.1 1017.6 1014.8 1012.9 1008.6 1007.1 1007.5 1013.3 1016.9 1020.6 1020.8 1015.4 MAX. QNH PRESSURE IN HPA 1030.0 1032.0 1026.5 1019.2 1018.7 1015.2 1009.3 1013.1 1016.5 1020.6 1024.7 1029.3 1032.0 DAY 24 1 11 15 16 6 2 29 20 26 18 29 MIN. QNH PRESSURE IN HPA 1015.1 1010.4 1008.7 1008.4 1009.4 1004.9 1002.0 1001.8 1010.2 1012.7 1014.6 1006.5 1001.8 DAY 6 11 26 2 28 26 23 13 18 29 12 20 MEAN QFF PRESSURE IN HPA 1023.9 1022.8 1017.3 1013.7 1010.5 1004.8 1002.7 1003.5 1010.0 1014.7 1020.1 1021.7 1013.8 MAX. QFF PRESSURE IN HPA 1032.0 1033.5 1026.4 1018.4 1016.7 1012.5 1005.4 1009.7 1013.4 1019.5 1025.2 1031.1 1033.5 DAY 24 1 11 23 16 6 26 30 20 26 29 14 MIN. QFF PRESSURE IN HPA 1014.5 1009.8 1007.4 1006.7 1005.9 999.3 997.3 997.0 1006.9 1010.7 1013.0 1006.4 997.0 DAY 6 11 26 2 28 26 23 14 26 29 12 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 959.3 959.1 954.7 952.2 950.2 946.1 945.0 945.5 950.8 953.9 957.4 957.4 952.6 MAX. QFE PRESSURE IN HPA 966.6 968.2 963.2 956.1 955.6 952.3 947.2 950.9 954.0 957.4 961.4 966.0 968.2 DAY 24 1 11 5 16 6 16 29 20 26 18 29 MIN. QFE PRESSURE IN HPA 951.3 949.0 944.5 947.1 946.8 942.6 940.5 939.7 948.0 950.2 951.7 944.1 939.7 DAY 11 24 26 2 28 18 23 14 10 29 12 20 MEAN QNH PRESSURE IN HPA 1023.3 1023.1 1018.5 1015.8 1013.7 1009.4 1008.3 1008.8 1014.4 1017.7 1021.3 1021.3 1016.3 MAX. QNH PRESSURE IN HPA 1031.0 1032.7 1027.4 1019.9 1019.4 1015.9 1010.6 1014.5 1017.7 1021.3 1025.5 1030.4 1032.7 DAY 24 1 11 5 16 6 16 29 20 26 18 29 MIN. QNH PRESSURE IN HPA 1014.9 1012.5 1007.7 1010.5 1010.1 1005.7 1003.5 1002.7 1011.4 1013.7 1015.3 1007.3 1002.7 DAY 11 24 26 2 28 18 23 14 10 29 12 20 MEAN QFF PRESSURE IN HPA 1024.7 1023.9 1018.2 1014.6 1010.9 1005.1 1003.3 1004.3 1010.8 1015.2 1020.7 1022.3 1014.5 MAX. QFF PRESSURE IN HPA 1033.1 1034.5 1027.4 1020.0 1017.0 1013.0 1005.8 1010.6 1014.4 1019.9 1025.9 1032.4 1034.5 DAY 24 1 11 5 16 7 3 29 20 26 28 13 MIN. QFF PRESSURE IN HPA 1016.0 1012.2 1005.6 1009.3 1006.1 1000.9 997.9 997.6 1007.9 1011.3 1014.5 1006.7 997.6 DAY 11 11 26 2 28 18 23 14 7 29 24 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 959.4 959.2 954.8 952.4 950.5 946.5 945.2 945.7 950.7 953.9 957.4 957.6 952.8 MAX. QFE PRESSURE IN HPA 966.6 967.9 963.7 957.0 956.1 953.2 947.5 951.0 953.3 957.0 961.7 966.0 967.9 DAY 24 1 11 26 16 6 3 29 20 6 18 13 MIN. QFE PRESSURE IN HPA 951.9 948.8 947.2 948.5 947.0 942.8 940.2 940.0 947.8 950.4 951.2 943.8 940.0 DAY 6 11 17 19 23 26 23 13 10 29 11 20 MEAN QNH PRESSURE IN HPA 1023.5 1023.3 1018.6 1016.0 1014.1 1009.8 1008.4 1009.0 1014.2 1017.6 1021.3 1021.5 1016.4 MAX. QNH PRESSURE IN HPA 1031.0 1032.4 1028.0 1020.9 1019.9 1016.9 1010.9 1014.6 1017.0 1020.9 1025.9 1030.4 1032.4 DAY 24 1 11 26 16 6 3 29 20 6 18 13 MIN. QNH PRESSURE IN HPA 1015.5 1012.3 1010.6 1011.9 1010.4 1005.9 1003.2 1003.0 1011.2 1013.9 1014.8 1007.0 1003.0 DAY 6 11 17 19 23 26 23 13 10 29 11 20 MEAN QFF PRESSURE IN HPA 1024.4 1023.5 1017.9 1014.7 1011.3 1005.6 1003.6 1004.5 1010.4 1014.7 1020.3 1022.1 1014.4 MAX. QFF PRESSURE IN HPA 1032.7 1033.6 1027.3 1020.6 1018.0 1013.7 1006.4 1010.6 1013.6 1018.5 1025.1 1033.0 1033.6 DAY 24 1 11 5 16 3 26 29 15 26 28 13 MIN. QFF PRESSURE IN HPA 1015.1 1011.0 1009.2 1010.7 1006.6 1000.8 998.0 997.6 1007.9 1011.0 1012.6 1006.1 997.6 DAY 6 11 26 27 23 26 23 13 10 29 11 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.9 9.3 12.1 17.9 24.5 30.3 32.1 33.0 27.0 23.2 14.1 9.8 20.2 MINIMUN AIR TEMPERATURE (C) 3.7 4.4 5.8 10.6 14.2 19.0 21.2 22.0 16.6 14.8 7.9 5.4 12.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 1 6 18 20 0 1 0 0 47 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 3 3 3 0 0 0 0 0 0 0 0 2 11 TEMPERATURE RECORDS LOWEST(C) -0.6 -0.4 -2.4 1.6 6.0 13.4 19.0 18.6 13.2 5.0 1.4 -2.0 -2.4 DAY 20 28 2 2 8 7 30 27 8 31 19 22 MAXIMUM AIR TEMPERATURE (C) 15.5 14.9 18.7 25.3 33.9 39.4 41.6 43.4 37.1 32.5 21.9 15.8 28.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 29 30 31 31 30 27 3 0 184 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.4 21.8 24.4 32.0 37.6 42.6 45.0 48.8 42.8 37.8 31.6 19.4 48.8 DAY 14 3 6 5 26 25 4 11 4 7 7 17 DIF. BETWEEN (MAX.-MIN.) (C) 11.8 10.5 12.9 14.7 19.7 20.4 20.4 21.4 20.5 17.7 14.0 10.4 16.2 MEAN DAILY TEMP. (MDT) (C) 9.6 9.7 12.2 18.0 24.1 29.2 31.4 32.7 26.9 23.6 14.9 10.6 20.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 12.2 107.7 245.6 322.1 362.2 176.5 90.0 3.0 0.0 1319.4 HEATING DEG. DAYS(BASE 18 0C) 260.5 233.6 179.5 38.9 2.0 0.0 0.0 0.0 0.0 4.1 110.9 229.1 1058.6 DEWPOINT (MEAN C) 4.0 3.4 4.4 9.1 7.7 5.7 7.0 8.2 6.0 6.6 4.1 4.4 5.9 MIXING RATIO (G/KG) 5.39 5.20 5.61 7.85 7.14 6.19 6.74 7.30 6.27 6.58 5.67 5.73 6.31 VAPOUR PRESSURE (HPA) 8.23 7.91 8.52 11.85 10.77 9.30 10.09 10.95 9.47 9.97 8.63 8.75 9.54 SATURATION DEF. (HPA) 3.58 4.18 6.33 9.98 22.82 37.35 41.31 43.84 29.13 20.58 8.73 3.76 19.30 RELATIVE HUMIDITY (MEAN %) 74 70 63 61 40 25 24 24 30 38 56 73 48 RELATIVE HUMIDITY (MAX. %) 89 88 85 84 66 43 42 40 49 58 78 89 68 RELATIVE HUMIDITY (MIN. %) 49 45 39 36 17 11 11 12 13 19 33 50 28 RELATIVE HUMIDITY (MEAN% 03UTC) 85 80 78 73 58 42 41 38 48 53 72 83 63 RELATIVE HUMIDITY (MEAN% 09UTC) 56 55 46 44 20 13 13 13 15 23 37 58 33 RELATIVE HUMIDITY (MEAN% 15UTC) 69 62 54 51 24 13 13 15 19 30 49 70 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 73.7 71.8 41.5 52.0 0.5 0.0 0.0 0.0 0.0 4.6 95.2 72.7 412.0 DAYS WITH PRECIPITATION >=10 3 4 1 2 0 0 0 0 0 0 3 4 17 DAYS WITH PRECIPITATION >= 5 5 5 2 5 0 0 0 0 0 0 6 6 29 DAYS WITH PRECIPITATION >= 1 10 8 6 5 0 0 0 0 0 1 8 9 47 DAYS WITH PRECIPITATION 10 11 12 10 4 0 0 0 0 4 9 14 74 GREATEST DAILY PRECIPITATION 32.0 17.0 24.0 18.0 0.2 0.0 0.0 0.0 0.0 4.0 28.0 15.0 32.0 DAY 28 25 26 27 30 ** ** ** ** 4 29 23 DAY WITH THUNDER STORM 3 5 6 7 2 0 0 0 0 2 5 2 32 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 2 5 4 8 4 1 0 1 1 0 0 27 WIND DIRECTION (PREVAILING) 135 135 135 135 135 270 270 270 270 270 135 135 135 PREVAILING WIND SPEED(KNOTS) 7.5 11.7 16.4 15.2 11.1 14.0 15.0 12.8 12.3 11.8 21.9 23.8 13.7 PREVAILING WIND PERCENT 12.5 14.7 24.2 18.8 16.9 17.9 24.6 15.7 15.0 8.5 11.7 9.3 11.7 CALMS PERCENT OF WIND 48.8 35.7 31.5 32.1 43.5 52.5 56.9 50.4 64.2 66.1 67.1 58.1 50.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 228 188 158 151 227 273 273 271 276 220 167 143 220 VECTOR WIND MAGNITUDE(KNOTS) 0.3 2.2 3.9 2.3 2.0 2.7 4.5 2.3 2.8 2.5 2.0 1.9 1.5 WIND STEADINESES (MEAN %) 6.7 31.0 40.2 25.8 27.8 43.5 75.0 38.3 66.7 46.3 37.7 33.9 23.8 WIND SPEED (MEAN KNOTS) 4.5 7.1 9.7 8.9 7.2 6.2 6.0 6.0 4.2 5.4 5.3 5.6 6.3 FASTEST WIND DIRECTION 220 240 180 180 190 240 290 310 310 180 120 120 180 FASTEST WIND SPEED (KNOTS) 49 43 68 58 43 31 33 39 27 49 68 51 68 DAY 28 20 19 26 16 3 20 12 1 29 10 12 DAYS WITH SKY CLEAR (0-2)/8 13 6 7 9 17 27 31 31 30 20 13 12 216 DAYS WITH P.CLOUDY (3-6)/8 12 14 16 12 12 3 0 0 0 9 10 12 100 DAYS WITH CLOUDY (7-8)/8 6 8 8 9 2 0 0 0 0 2 7 7 49 DAYS WITH VISIBILITY =< 2 KM 1 1 3 1 0 0 0 0 0 0 2 5 13 DURATION OF SUNSHINE HOURS 202.0 155.3 164.2 189.0 304.8 356.3 379.2 368.5 325.7 259.4 191.3 175.9 3071.6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 957.8 954.5 953.3 951.8 950.4 944.5 941.8 944.2 949.0 953.6 957.5 958.9 951.4 MAX. QFE PRESSURE IN HPA 965.6 964.0 964.2 960.1 957.5 952.8 948.0 948.8 954.3 959.8 964.4 967.0 967.0 DAY-HOUR 7- 6 5-21 2- 6 30- 9 1- 0 3-21 3- 6 29- 6 22- 6 31- 6 25- 6 30- 6 MIN. QFE PRESSURE IN HPA 941.9 941.9 939.1 943.1 943.9 937.6 937.2 939.5 942.8 947.0 946.3 947.3 937.2 DAY-HOUR 28-12 19- 0 25-21 20- 3 28-15 30-12 25-15 20-15 4-12 3- 3 9-12 6- 3 MEAN QNH PRESSURE IN HPA 1021.8 1018.2 1017.0 1015.4 1013.9 1007.7 1004.9 1007.4 1012.5 1017.3 1021.4 1022.9 1015.0 MAX. QNH PRESSURE IN HPA 1030.0 1028.3 1028.5 1024.2 1021.4 1016.5 1011.4 1012.3 1018.0 1023.8 1028.7 1031.4 1031.4 DAY-HOUR 7- 6 5-21 2- 6 30- 9 1- 0 3-21 3- 6 29- 6 22- 6 31- 6 25- 6 30- 6 MIN. QNH PRESSURE IN HPA 1005.0 1005.0 1002.0 1006.2 1007.1 1000.4 1000.0 1002.4 1005.9 1010.4 1009.6 1010.7 1000.0 DAY-HOUR 28-12 19- 0 25-21 20- 3 28-15 30-12 25-15 20-15 4-12 3- 3 9-12 6- 3 MEAN QFF PRESSURE IN HPA 1022.5 1018.8 1017.0 1013.9 1011.0 1003.6 1000.4 1002.7 1009.1 1014.7 1020.9 1023.4 1013.2 MAX. QFF PRESSURE IN HPA 1030.8 1029.5 1030.4 1023.1 1020.3 1013.0 1006.9 1008.3 1015.3 1023.8 1029.4 1033.3 1033.3 DAY-HOUR 7- 6 6- 3 2- 6 30- 9 1- 3 3-21 3- 3 29- 6 22- 6 31- 6 22- 6 30- 6 MIN. QFF PRESSURE IN HPA 1004.7 1005.4 999.7 1002.7 1003.5 996.2 995.9 998.1 1001.4 1006.2 1007.2 1010.7 995.9 DAY-HOUR 28-12 20- 0 25-21 26- 0 28-12 30-12 7-12 20-15 4-12 3- 3 9-12 6- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 957.9 954.3 953.2 951.3 950.5 944.5 941.6 944.0 948.7 953.3 957.3 958.7 951.3 MAX. QFE PRESSURE IN HPA 964.0 964.0 963.4 958.1 957.5 951.2 947.0 947.2 953.2 958.0 963.1 965.8 965.8 DAY 31 6 2 30 1 5 3 29 22 31 26 30 MIN. QFE PRESSURE IN HPA 949.8 941.9 940.2 943.4 944.8 938.5 938.2 940.0 943.1 947.6 949.0 949.4 938.2 DAY 28 19 26 26 29 30 1 21 5 3 10 19 MEAN QNH PRESSURE IN HPA 1021.8 1018.0 1016.9 1014.9 1014.0 1007.7 1004.7 1007.2 1012.1 1017.0 1021.2 1022.7 1014.8 MAX. QNH PRESSURE IN HPA 1028.3 1028.3 1027.6 1022.1 1021.4 1014.8 1010.4 1010.6 1016.9 1021.9 1027.3 1030.2 1030.2 DAY 31 6 2 30 1 5 3 29 22 31 26 30 MIN. QNH PRESSURE IN HPA 1013.3 1005.0 1003.2 1006.6 1008.0 1001.4 1001.1 1003.0 1006.2 1011.0 1012.5 1012.9 1001.1 DAY 28 19 26 26 29 30 1 21 5 3 10 19 MEAN QFF PRESSURE IN HPA 1022.3 1018.4 1016.7 1013.3 1011.1 1003.7 1000.2 1002.5 1008.5 1014.2 1020.4 1023.0 1012.8 MAX. QFF PRESSURE IN HPA 1028.9 1029.2 1029.4 1021.4 1020.3 1011.9 1006.2 1006.7 1014.0 1021.5 1026.3 1031.2 1031.2 DAY 31 6 2 3 1 5 3 29 22 31 26 30 MIN. QFF PRESSURE IN HPA 1012.7 1005.4 1001.0 1002.7 1004.9 997.0 996.8 998.1 1001.7 1007.6 1009.8 1011.3 996.8 DAY 28 20 26 26 29 30 1 21 5 3 10 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 957.7 954.2 953.4 951.4 950.6 944.7 941.7 944.3 948.9 953.6 957.5 958.8 951.4 MAX. QFE PRESSURE IN HPA 964.1 963.9 963.4 957.9 957.2 951.8 947.5 947.7 953.1 958.5 962.8 965.6 965.6 DAY 7 6 2 30 1 2 3 29 27 31 26 30 MIN. QFE PRESSURE IN HPA 944.4 942.0 942.0 943.1 945.1 938.2 938.6 940.0 943.4 947.0 950.5 947.3 938.2 DAY 28 19 19 20 29 30 26 21 5 3 9 6 MEAN QNH PRESSURE IN HPA 1021.7 1018.0 1017.1 1015.0 1014.2 1008.0 1004.8 1007.5 1012.4 1017.3 1021.4 1022.8 1015.0 MAX. QNH PRESSURE IN HPA 1028.4 1028.2 1027.6 1021.8 1021.1 1015.4 1010.9 1011.1 1016.8 1022.5 1027.0 1030.0 1030.0 DAY 7 6 2 30 1 2 3 29 27 31 26 30 MIN. QNH PRESSURE IN HPA 1007.6 1005.1 1005.1 1006.2 1008.4 1001.1 1001.5 1003.0 1006.6 1010.4 1014.0 1010.7 1001.1 DAY 28 19 19 20 29 30 26 21 5 3 9 6 MEAN QFF PRESSURE IN HPA 1022.6 1018.7 1017.3 1013.7 1011.5 1004.1 1000.6 1003.1 1009.4 1015.1 1021.2 1023.6 1013.4 MAX. QFF PRESSURE IN HPA 1029.1 1029.5 1030.0 1022.0 1020.3 1012.5 1006.9 1007.6 1014.3 1022.7 1028.0 1031.5 1031.5 DAY 7 6 2 2 1 2 3 29 22 31 22 30 MIN. QFF PRESSURE IN HPA 1007.5 1005.5 1003.3 1004.0 1005.5 996.9 997.4 998.5 1002.5 1006.2 1012.0 1010.7 996.9 DAY 28 19 19 20 29 30 26 21 5 3 9 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 958.6 955.3 954.4 952.5 951.2 945.2 942.2 944.9 949.7 954.4 958.4 959.9 952.2 MAX. QFE PRESSURE IN HPA 965.6 964.0 964.2 959.4 957.3 952.6 948.0 948.8 954.3 959.8 964.4 967.0 967.0 DAY 7 6 2 30 1 4 3 29 22 31 25 30 MIN. QFE PRESSURE IN HPA 942.0 944.0 945.3 945.0 946.4 938.4 939.0 941.0 944.8 948.1 950.0 947.6 938.4 DAY 28 19 19 20 29 30 1 20 5 3 9 6 MEAN QNH PRESSURE IN HPA 1022.6 1019.1 1018.2 1016.1 1014.8 1008.5 1005.3 1008.1 1013.3 1018.2 1022.4 1023.9 1015.9 MAX. QNH PRESSURE IN HPA 1030.0 1028.3 1028.5 1023.4 1021.2 1016.3 1011.4 1012.3 1018.0 1023.8 1028.7 1031.4 1031.4 DAY 7 6 2 30 1 4 3 29 22 31 25 30 MIN. QNH PRESSURE IN HPA 1005.1 1007.2 1008.6 1008.2 1009.7 1001.3 1001.9 1004.0 1008.0 1011.5 1013.5 1011.0 1001.3 DAY 28 19 19 20 29 30 1 20 5 3 9 6 MEAN QFF PRESSURE IN HPA 1023.7 1019.9 1018.3 1014.7 1011.9 1004.1 1000.5 1003.2 1009.8 1015.6 1022.1 1024.7 1014.0 MAX. QFF PRESSURE IN HPA 1030.8 1029.4 1030.4 1022.8 1019.7 1012.5 1006.7 1008.3 1015.3 1023.8 1029.4 1033.3 1033.3 DAY 7 6 2 3 1 4 3 29 22 31 22 30 MIN. QFF PRESSURE IN HPA 1005.1 1007.4 1007.6 1006.0 1006.6 996.7 997.1 999.2 1003.9 1008.3 1011.6 1011.0 996.7 DAY 28 19 19 20 29 30 1 20 5 3 9 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 958.1 955.2 954.0 952.6 951.0 945.0 942.0 944.6 949.3 954.0 957.7 959.1 951.9 MAX. QFE PRESSURE IN HPA 965.4 963.0 963.0 960.1 956.7 952.5 947.5 948.3 953.5 958.5 963.9 965.4 965.4 DAY 7 6 2 30 1 2 3 29 22 31 22 30 MIN. QFE PRESSURE IN HPA 942.5 944.5 943.9 945.0 945.5 938.1 938.6 940.6 943.9 949.2 947.8 949.3 938.1 DAY 28 19 25 20 28 30 25 20 5 27 9 6 MEAN QNH PRESSURE IN HPA 1022.0 1019.0 1017.7 1016.2 1014.5 1008.2 1005.1 1007.8 1012.8 1017.7 1021.6 1023.1 1015.5 MAX. QNH PRESSURE IN HPA 1029.7 1027.2 1027.2 1024.2 1020.6 1016.2 1010.9 1011.7 1017.2 1022.5 1028.2 1029.7 1029.7 DAY 7 6 2 30 1 2 3 29 22 31 22 30 MIN. QNH PRESSURE IN HPA 1005.6 1007.7 1007.1 1008.2 1008.8 1001.0 1001.5 1003.6 1007.1 1012.7 1011.2 1012.8 1001.0 DAY 28 19 25 20 28 30 25 20 5 27 9 6 MEAN QFF PRESSURE IN HPA 1022.5 1019.4 1017.5 1014.6 1011.6 1004.0 1000.5 1003.0 1009.2 1014.9 1020.9 1023.4 1013.5 MAX. QFF PRESSURE IN HPA 1029.9 1028.1 1028.6 1023.1 1019.1 1012.9 1006.5 1007.6 1014.0 1021.7 1028.5 1030.8 1030.8 DAY 7 6 2 30 1 4 3 29 22 31 22 30 MIN. QFF PRESSURE IN HPA 1005.8 1007.7 1005.0 1005.5 1005.0 996.4 996.8 998.7 1002.5 1009.6 1008.6 1012.8 996.4 DAY 28 19 25 20 28 30 7 20 5 27 9 6 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 956.9 953.8 952.6 951.6 949.8 944.0 941.4 943.6 948.4 952.9 956.6 958.2 950.8 MAX. QFE PRESSURE IN HPA 964.1 962.0 961.8 959.2 955.0 951.4 945.3 946.7 952.3 958.4 962.6 964.2 964.2 DAY 7 6 1 30 1 4 3 29 26 31 22 21 MIN. QFE PRESSURE IN HPA 941.9 944.0 941.0 943.8 944.0 937.6 937.7 940.0 942.8 948.2 946.3 950.6 937.6 DAY 28 19 25 20 28 30 25 20 4 1 9 18 MEAN QNH PRESSURE IN HPA 1020.8 1017.5 1016.2 1015.2 1013.3 1007.2 1004.4 1006.7 1011.8 1016.6 1020.4 1022.1 1014.4 MAX. QNH PRESSURE IN HPA 1028.4 1026.2 1026.0 1023.2 1018.8 1015.0 1008.6 1010.0 1015.9 1022.4 1026.8 1028.5 1028.5 DAY 7 6 1 30 1 4 3 29 26 31 22 21 MIN. QNH PRESSURE IN HPA 1005.0 1007.2 1004.0 1007.0 1007.2 1000.4 1000.6 1003.0 1005.9 1011.6 1009.6 1014.2 1000.4 DAY 28 19 25 20 28 30 25 20 4 1 9 18 MEAN QFF PRESSURE IN HPA 1021.2 1017.9 1016.0 1013.6 1010.4 1003.2 1000.0 1002.1 1008.3 1013.9 1019.7 1022.4 1012.4 MAX. QFF PRESSURE IN HPA 1028.2 1026.8 1027.5 1022.1 1017.3 1012.0 1004.3 1006.1 1012.6 1021.9 1026.9 1030.1 1030.1 DAY 7 6 1 30 1 4 2 29 20 31 22 21 MIN. QFF PRESSURE IN HPA 1004.7 1007.1 1001.8 1004.3 1003.5 996.2 995.9 998.3 1001.4 1008.4 1007.2 1013.4 995.9 DAY 28 19 25 20 28 30 7 20 4 1 9 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 957.4 953.8 952.5 951.1 949.3 943.6 941.0 943.2 948.3 953.1 956.9 958.6 950.7 MAX. QFE PRESSURE IN HPA 964.9 961.8 962.3 958.4 953.6 950.7 945.2 946.7 951.8 959.0 963.6 964.6 964.9 DAY 7 6 1 30 1 4 2 29 20 31 25 21 MIN. QFE PRESSURE IN HPA 943.7 944.4 940.1 943.9 943.9 937.6 937.2 939.5 943.0 947.7 948.7 950.8 937.2 DAY 28 19 25 27 28 30 25 20 4 1 9 18 MEAN QNH PRESSURE IN HPA 1021.3 1017.5 1016.1 1014.7 1012.8 1006.7 1004.1 1006.4 1011.7 1016.8 1020.8 1022.6 1014.3 MAX. QNH PRESSURE IN HPA 1029.2 1026.0 1026.5 1022.4 1017.3 1014.3 1008.5 1010.0 1015.4 1023.0 1027.9 1028.9 1029.2 DAY 7 6 1 30 1 4 2 29 20 31 25 21 MIN. QNH PRESSURE IN HPA 1006.9 1007.6 1003.1 1007.1 1007.1 1000.4 1000.0 1002.4 1006.1 1011.1 1012.1 1014.4 1000.0 DAY 28 19 25 27 28 30 25 20 4 1 9 18 MEAN QFF PRESSURE IN HPA 1022.2 1018.2 1016.3 1013.3 1010.1 1002.9 999.9 1001.9 1008.8 1014.6 1020.6 1023.3 1012.7 MAX. QFF PRESSURE IN HPA 1029.7 1027.3 1028.6 1021.5 1016.2 1011.4 1004.5 1006.4 1012.9 1023.4 1027.9 1031.1 1031.1 DAY 7 6 1 30 1 4 2 29 20 31 25 21 MIN. QFF PRESSURE IN HPA 1007.0 1007.2 1001.4 1005.7 1003.9 996.4 996.2 998.1 1002.2 1008.4 1010.4 1014.0 996.2 DAY 28 19 25 27 28 30 25 20 4 1 9 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 958.1 954.5 953.2 952.0 950.2 944.4 942.1 944.4 949.4 953.9 957.8 959.2 951.6 MAX. QFE PRESSURE IN HPA 965.3 962.9 963.4 958.8 954.6 951.8 946.1 947.9 952.9 959.4 964.1 965.8 965.8 DAY 7 5 1 30 10 3 2 29 22 31 25 29 MIN. QFE PRESSURE IN HPA 946.8 944.2 940.0 944.8 945.1 938.3 938.5 940.8 944.6 948.4 950.4 951.0 938.3 DAY 28 18 25 19 28 30 25 20 4 1 9 18 MEAN QNH PRESSURE IN HPA 1022.1 1018.3 1016.9 1015.6 1013.8 1007.6 1005.2 1007.6 1012.9 1017.7 1021.8 1023.2 1015.2 MAX. QNH PRESSURE IN HPA 1029.6 1027.1 1027.6 1022.8 1018.4 1015.4 1009.4 1011.3 1016.6 1023.4 1028.4 1030.2 1030.2 DAY 7 5 1 30 10 3 2 29 22 31 25 29 MIN. QNH PRESSURE IN HPA 1010.1 1007.4 1003.0 1008.0 1008.4 1001.2 1001.4 1003.8 1007.8 1011.8 1013.9 1014.6 1001.2 DAY 28 18 25 19 28 30 25 20 4 1 9 18 MEAN QFF PRESSURE IN HPA 1023.1 1019.0 1017.0 1014.2 1010.8 1003.3 1000.4 1002.8 1009.5 1015.2 1021.4 1023.9 1013.4 MAX. QFF PRESSURE IN HPA 1030.4 1028.3 1029.6 1021.7 1016.2 1011.6 1004.9 1007.0 1013.5 1023.2 1027.9 1032.0 1032.0 DAY 7 5 1 2 10 4 2 29 22 31 22 29 MIN. QFF PRESSURE IN HPA 1010.3 1007.7 1001.5 1006.1 1005.1 996.4 996.8 998.9 1003.4 1008.5 1012.0 1013.9 996.4 DAY 28 19 25 19 28 30 7 20 4 1 9 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 958.1 954.8 953.5 951.9 950.7 944.8 942.4 944.5 949.3 953.9 957.7 959.2 951.7 MAX. QFE PRESSURE IN HPA 964.2 964.0 963.4 958.4 955.1 952.8 947.0 947.8 952.8 958.9 962.4 965.8 965.8 DAY 7 5 1 30 10 3 2 29 21 31 25 29 MIN. QFE PRESSURE IN HPA 948.9 944.4 939.1 944.2 945.4 939.0 939.2 941.2 944.0 948.2 950.2 950.1 939.0 DAY 28 19 25 19 28 30 25 20 4 1 9 18 MEAN QNH PRESSURE IN HPA 1022.0 1018.5 1017.2 1015.5 1014.2 1008.1 1005.5 1007.7 1012.8 1017.6 1021.6 1023.2 1015.3 MAX. QNH PRESSURE IN HPA 1028.5 1028.3 1027.6 1022.4 1018.9 1016.5 1010.4 1011.2 1016.5 1022.9 1026.6 1030.2 1030.2 DAY 7 5 1 30 10 3 2 29 21 31 25 29 MIN. QNH PRESSURE IN HPA 1012.4 1007.6 1002.0 1007.4 1008.7 1001.9 1002.1 1004.2 1007.2 1011.6 1013.7 1013.6 1001.9 DAY 28 19 25 19 28 30 25 20 4 1 9 18 MEAN QFF PRESSURE IN HPA 1022.5 1019.0 1016.9 1013.9 1011.2 1003.9 1000.8 1002.9 1009.2 1014.8 1020.8 1023.5 1013.3 MAX. QFF PRESSURE IN HPA 1028.9 1028.9 1029.4 1021.7 1016.4 1013.0 1006.0 1007.1 1013.6 1022.0 1026.6 1031.3 1031.3 DAY 30 5 1 2 10 3 2 29 21 31 22 29 MIN. QFF PRESSURE IN HPA 1013.0 1007.1 999.7 1004.1 1005.3 997.3 997.3 999.3 1002.7 1008.0 1011.0 1012.1 997.3 DAY 28 19 25 25 28 30 7 20 4 1 9 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.9 9.2 12.6 18.2 24.9 30.6 33.7 32.5 28.0 22.5 14.7 9.8 20.4 MINIMUN AIR TEMPERATURE (C) 2.7 3.2 6.0 10.1 14.4 18.6 22.1 21.0 17.2 13.7 8.0 4.6 11.8 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.0 0.2 1.2 5.7 19.1 15.8 2.6 0.6 0.1 0.0 45.3 DAYS WITH MINIMUM TEMP. <=-4 0.6 0.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.2 1.6 DAYS WITH FREEZING MIN.<= 0 7.7 5.0 1.7 0.1 0.0 0.0 0.0 0.0 0.0 0.0 1.2 3.6 19.3 TEMPERATURE RECORDS LOWEST(C) -10.0 -8.6 -2.4 -0.4 5.8 9.8 15.5 15.8 7.2 5.0 -5.6 -4.2 -10.0 YEAR-DAY 92-25 92-29 3- 2 97-12 95- 9 89-11 92- 1 0-31 92-29 96-31 88-15 94- 7 92-25 MAXIMUM AIR TEMPERATURE (C) 13.5 15.1 18.7 25.2 32.6 38.7 42.2 41.8 37.4 30.8 21.9 15.5 27.8 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.1 4.1 22.8 29.9 30.9 31.0 29.9 20.1 0.7 0.0 169.5 DAYS WITH MAXIMUM TEMP. <= 0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 TEMPERATURE RECORDS HIGHEST(C) 23.0 26.0 30.2 35.0 42.8 44.8 47.2 48.8 44.6 39.0 32.8 27.0 48.8 YEAR-DAY 0- 1 87- 2 99-31 87-30 99-30 98-23 1-24 3-11 95- 1 99- 3 1- 5 90- 4 3-11 DIF. BETWEEN (MAX.-MIN.) (C) 10.8 11.9 12.7 15.1 18.2 20.1 20.1 20.8 20.2 17.1 13.9 10.9 16.0 MEAN DAILY TEMP. (MDT) (C) 8.1 9.2 12.4 17.7 23.5 28.7 32.1 31.4 27.3 22.3 15.0 10.1 19.8 STANDARD DEVIATION OF MDT(C) 1.68 1.50 1.44 1.40 1.24 0.96 1.31 1.24 0.90 1.15 1.26 1.64 1.31 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.1 8.7 93.0 230.4 343.3 321.5 188.5 58.7 1.4 0.1 1245.7 HEATING DEG. DAYS(BASE 18 0C) 306.6 247.8 176.0 45.5 1.6 0.0 0.0 0.0 0.0 3.8 101.1 246.8 1129.2 DEWPOINT (MEAN C) 1.9 2.0 4.7 8.3 7.1 5.6 8.1 7.6 5.3 5.7 4.9 3.6 5.4 MIXING RATIO (G/KG) 4.76 4.82 5.83 7.44 6.93 6.35 7.51 7.28 6.08 6.27 6.00 5.39 6.22 VAPOUR PRESSURE (HPA) 7.26 7.35 8.85 11.24 10.46 9.54 11.23 10.91 9.19 9.52 9.14 8.23 9.41 SATURATION DEF. (HPA) 3.86 4.89 6.58 11.09 23.54 37.75 44.89 41.84 31.73 19.64 8.71 4.44 19.91 RELATIVE HUMIDITY (MEAN %) 70 65 63 57 38 24 23 25 27 39 58 70 46 RELATIVE HUMIDITY (MAX. %) 88 86 85 82 65 44 41 42 45 58 79 87 67 RELATIVE HUMIDITY (MIN. %) 47 42 40 33 19 12 12 12 12 21 34 47 28 RELATIVE HUMIDITY (MEAN% 03UTC) 82 81 80 76 60 42 39 40 43 55 74 82 63 RELATIVE HUMIDITY (MEAN% 09UTC) 54 49 47 40 23 14 15 14 15 24 39 54 32 RELATIVE HUMIDITY (MEAN% 15UTC) 65 57 53 47 26 15 15 15 18 31 52 66 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 79.2 59.1 91.6 48.2 13.9 0.4 0.3 0.0 0.2 18.1 55.8 94.0 460.8 DAYS WITH PRECIPITATION >=10 2.8 2.2 3.4 2.0 0.4 0.0 0.0 0.0 0.0 0.5 2.1 2.9 16.3 DAYS WITH PRECIPITATION >= 5 4.8 3.8 5.0 3.4 0.7 0.0 0.0 0.0 0.0 0.8 3.3 4.7 26.5 DAYS WITH PRECIPITATION >= 1 8.7 7.6 8.5 5.7 1.9 0.2 0.1 0.0 0.1 2.1 5.4 7.8 48.1 DAYS WITH PRECIPITATION 10.7 9.8 11.6 8.3 4.3 0.7 0.2 0.0 0.4 3.7 7.6 10.6 67.9 GREATEST DAILY PRECIPITATION 75.0 60.0 75.0 42.0 40.0 2.0 4.3 0.0 2.0 64.0 54.0 102.0 102.0 YEAR-DAY 99- 9 90-10 87- 4 2-19 86- 4 93- 1 99-15 **-** 95-20 87-25 86-29 91-12 91 DAY WITH THUNDER STORM 1.8 1.8 3.1 4.9 2.4 0.4 0.2 0.0 0.5 2.7 2.6 2.4 22.8 DAYS WITH SNOW OR SLEET 0.6 0.2 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.4 DAYS WITH DUST 0.4 0.7 1.1 1.1 2.8 2.9 1.8 1.8 1.4 0.7 0.6 0.4 15.7 WIND DIRECTION (PREVAILING) 135 135 135 135 135 270 270 270 270 135 135 135 270 PREVAILING WIND SPEED(KNOTS) 9.9 10.8 11.3 10.3 10.2 9.5 8.7 8.1 7.5 8.8 10.6 11.3 7.9 PREVAILING WIND PERCENT 7.2 8.2 8.2 7.3 9.0 14.2 15.7 13.3 10.0 7.3 7.3 5.7 8.3 CALMS PERCENT OF WIND 71.7 65.3 63.7 65.4 59.8 59.1 60.3 63.8 67.7 69.4 72.7 75.6 66.2 NO. OF WIND OBSERVATION 220.2 200.2 220.4 213.3 220.9 214.8 223.9 228.5 222.3 225.2 218.3 225.7 2633.7 VECTOR WIND DIRECTION (MEAN) 176 176 184 195 216 266 266 289 273 198 176 167 222 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.2 1.3 0.9 1.0 1.9 1.6 1.5 0.8 0.8 0.9 0.9 0.8 WIND STEADINESES (MEAN %) 33.3 38.7 37.1 28.1 25.6 46.3 42.1 48.4 30.8 28.6 37.5 40.9 25.8 WIND SPEED (MEAN KNOTS) 2.4 3.1 3.5 3.2 3.9 4.1 3.8 3.1 2.6 2.8 2.4 2.2 3.1 FASTEST WIND DIRECTION 180 240 180 180 190 240 120 310 180 180 120 180 180 FASTEST WIND SPEED (KNOTS) 49 43 68 58 43 39 49 39 43 49 68 78 78 YEAR-DAY 98-11 3-20 3-19 3-26 3-16 86- 6 87-27 3-12 96-21 3-29 3-10 2-21 2 DAYS WITH SKY CLEAR (0-2)/8 13.5 11.7 12.2 11.4 18.6 27.9 29.3 29.9 28.7 20.6 15.9 11.3 231.0 DAYS WITH P.CLOUDY (3-6)/8 9.4 9.2 10.6 11.9 9.8 1.9 1.5 1.0 1.2 8.6 8.3 11.6 85.0 DAYS WITH CLOUDY (7-8)/8 8.1 7.3 8.2 6.7 2.6 0.1 0.1 0.1 0.1 1.8 5.8 8.1 49.0 DAYS WITH VISIBILITY =< 2 KM 1.3 0.7 1.3 0.7 1.0 0.6 0.8 0.4 0.2 0.1 0.4 1.7 9.2 DURATION OF SUNSHINE HOURS 166.6 174.0 201.3 223.4 287.5 340.1 356.1 339.3 307.8 255.9 199.3 153.7 3005.0 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 957.8 956.2 953.7 952.4 950.0 945.3 942.3 944.4 949.4 954.5 957.3 958.7 951.8 MAX. QFE PRESSURE IN HPA 971.2 968.6 966.4 963.2 958.2 954.9 951.0 951.4 958.4 963.1 967.1 969.5 971.2 YEAR-DAY 92- 4 2- 1 92-12 97-13 94-17 92- 1 96- 3 1-20 97-30 95-25 88-15 94- 6 92- 4 MIN. QFE PRESSURE IN HPA 941.9 938.6 936.3 937.1 936.0 933.8 934.3 932.0 937.8 940.0 942.6 941.5 932.0 YEAR-DAY 3-28 88- 2 88- 8 86-25 86- 3 88-30 87-27 86- 5 86-10 86- 1 86- 8 86-27 86- 5 MEAN QNH PRESSURE IN HPA 1021.7 1020.1 1017.4 1016.1 1013.5 1008.6 1005.4 1007.6 1012.8 1018.3 1021.3 1022.6 1015.5 MAX. QNH PRESSURE IN HPA 1035.9 1033.1 1030.8 1027.4 1022.2 1018.7 1014.6 1015.0 1022.4 1027.3 1031.5 1034.1 1035.9 YEAR-DAY 92- 4 2- 1 92-12 97-13 94-17 92- 1 96- 3 1-20 97-30 95-25 88-15 94- 6 92- 4 MIN. QNH PRESSURE IN HPA 1005.0 1001.5 999.1 999.9 998.8 996.4 997.0 994.5 1000.7 1003.0 1005.7 1004.6 994.5 YEAR-DAY 3-28 88- 2 88- 8 86-25 86- 3 88-30 87-27 86- 5 86-10 86- 1 86- 8 86-27 86- 5 MEAN QFF PRESSURE IN HPA 1022.8 1021.7 1017.5 1014.9 1010.9 1004.7 1001.0 1003.4 1009.7 1016.2 1020.5 1023.3 1013.9 MAX. QFF PRESSURE IN HPA 1039.3 1036.4 1032.4 1028.4 1020.8 1016.3 1010.0 1011.2 1019.9 1026.3 1030.8 1037.1 1039.3 YEAR-DAY 92- 4 97- 7 92-12 97-13 95- 8 92- 1 96- 3 2-31 97-30 95-25 1-20 94- 6 92- 4 MIN. QFF PRESSURE IN HPA 1004.7 1004.2 999.4 1000.2 999.3 992.4 991.5 989.7 999.0 999.2 1004.8 1005.4 989.7 YEAR-DAY 3-28 95- 5 88- 8 88-25 88-31 88-30 87-27 86- 5 86- 5 86- 1 1-18 86-27 86- 5 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 958.4 957.1 954.6 952.9 950.7 946.1 942.7 944.9 949.7 954.8 957.6 959.3 952.4 MAX. QFE PRESSURE IN HPA 969.6 967.6 965.0 962.5 957.5 953.5 950.7 950.4 957.2 961.8 965.3 969.3 969.6 YEAR-DAY 92- 5 2- 2 92-12 97-13 3- 1 97- 8 96- 4 99-20 94-24 95-25 96-16 94- 7 92- 5 MIN. QFE PRESSURE IN HPA 944.4 941.9 940.2 942.1 943.5 938.5 936.6 939.0 942.6 947.6 943.2 945.2 936.6 YEAR-DAY 93- 8 3-19 3-26 99- 8 1- 3 3-30 95-21 2-14 94- 2 3- 3 1-18 2-21 95-21 MEAN QNH PRESSURE IN HPA 1022.4 1021.0 1018.4 1016.6 1014.3 1009.4 1005.9 1008.1 1013.2 1018.6 1021.6 1023.4 1016.1 MAX. QNH PRESSURE IN HPA 1034.2 1032.1 1029.3 1026.7 1021.4 1017.2 1014.3 1013.9 1021.1 1026.0 1029.6 1033.9 1034.2 YEAR-DAY 92- 5 2- 2 92-12 97-13 3- 1 97- 8 96- 4 99-20 94-24 95-25 96-16 94- 7 92- 5 MIN. QNH PRESSURE IN HPA 1007.6 1005.0 1003.2 1005.2 1006.7 1001.4 999.4 1001.9 1005.7 1011.0 1006.3 1008.5 999.4 YEAR-DAY 93- 8 3-19 3-26 99- 8 1- 3 3-30 95-21 2-14 94- 2 3- 3 1-18 2-21 95-21 MEAN QFF PRESSURE IN HPA 1023.1 1021.5 1018.2 1015.1 1011.5 1005.5 1001.2 1003.6 1009.6 1016.1 1020.8 1023.7 1014.2 MAX. QFF PRESSURE IN HPA 1037.3 1034.4 1030.8 1027.8 1020.3 1014.0 1009.9 1010.0 1018.5 1024.6 1029.8 1037.0 1037.3 YEAR-DAY 92- 5 97- 7 92-12 97-13 3- 1 97- 8 96- 4 2-30 97-30 0-29 1-20 94- 7 92- 5 MIN. QFF PRESSURE IN HPA 1007.0 1004.8 1001.0 1002.4 1003.8 997.0 993.7 996.8 1001.4 1007.6 1004.8 1007.6 993.7 YEAR-DAY 93- 8 95- 5 3-26 99- 8 1-30 3-30 0-13 2-14 94- 2 3- 3 1-18 2-21 0-13 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 957.7 956.2 953.6 952.4 950.2 945.7 942.7 944.7 949.5 954.6 957.3 958.6 951.9 MAX. QFE PRESSURE IN HPA 968.3 968.0 965.9 962.2 957.3 953.2 950.3 951.0 957.6 962.2 967.0 968.6 968.6 YEAR-DAY 92- 5 2- 2 92-12 97-13 94-17 90- 5 89- 9 2-31 94-24 95-25 88-15 94- 7 94- 7 MIN. QFE PRESSURE IN HPA 944.4 938.6 939.0 938.0 940.0 935.5 936.3 934.9 941.8 941.2 943.1 942.9 934.9 YEAR-DAY 3-28 88- 2 91- 6 86-10 86- 4 88-30 87-27 86- 6 87-11 86- 1 1-18 2-21 86- 6 MEAN QNH PRESSURE IN HPA 1021.6 1020.0 1017.4 1016.0 1013.8 1009.0 1005.8 1007.9 1013.0 1018.4 1021.2 1022.5 1015.6 MAX. QNH PRESSURE IN HPA 1032.8 1032.5 1030.3 1026.4 1021.2 1016.9 1013.8 1014.6 1021.5 1026.4 1031.4 1033.1 1033.1 YEAR-DAY 92- 5 2- 2 92-12 97-13 94-17 90- 5 89- 9 2-31 94-24 95-25 88-15 94- 7 94- 7 MIN. QNH PRESSURE IN HPA 1007.6 1001.5 1001.9 1000.9 1003.0 998.2 999.1 997.6 1004.9 1004.2 1006.2 1006.0 997.6 YEAR-DAY 3-28 88- 2 91- 6 86-10 86- 4 88-30 87-27 86- 6 87-11 86- 1 1-18 2-21 86- 6 MEAN QFF PRESSURE IN HPA 1022.9 1020.9 1017.4 1014.9 1011.2 1005.3 1001.3 1003.7 1009.8 1016.4 1021.0 1023.3 1014.0 MAX. QFF PRESSURE IN HPA 1036.2 1034.9 1032.2 1027.8 1020.5 1014.0 1009.8 1011.2 1019.2 1025.5 1034.6 1036.7 1036.7 YEAR-DAY 92- 5 97- 7 92-12 97-13 95- 9 90- 5 89- 9 2-31 97-30 95-25 88-15 94- 7 94- 7 MIN. QFF PRESSURE IN HPA 1007.5 1001.2 1001.7 999.7 1000.1 994.3 993.5 992.0 1000.7 1000.7 1005.2 1005.4 992.0 YEAR-DAY 3-28 88- 2 91- 6 86-10 86-29 88-30 87-27 86- 6 86- 5 86- 1 1-18 2-21 86- 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 958.6 957.1 954.5 953.2 950.8 946.0 943.0 945.1 950.2 955.5 958.3 959.5 952.6 MAX. QFE PRESSURE IN HPA 970.2 968.4 966.4 963.2 958.1 954.6 950.8 951.2 958.4 963.1 967.1 969.0 970.2 YEAR-DAY 92- 4 97- 7 92-12 97-13 94-17 92- 2 89- 9 99-19 97-30 95-25 88-15 94- 7 92- 4 MIN. QFE PRESSURE IN HPA 942.0 940.7 940.4 939.6 940.4 935.1 936.7 936.0 942.7 940.5 943.7 943.5 935.1 YEAR-DAY 3-28 88- 2 0-24 86-28 86- 3 88-30 87-27 86- 6 86- 6 86- 1 86- 8 86-27 88-30 MEAN QNH PRESSURE IN HPA 1022.6 1021.0 1018.3 1016.9 1014.3 1009.3 1006.1 1008.4 1013.7 1019.3 1022.2 1023.5 1016.3 MAX. QNH PRESSURE IN HPA 1034.8 1032.9 1030.8 1027.4 1022.1 1018.4 1014.4 1014.8 1022.4 1027.3 1031.5 1033.5 1034.8 YEAR-DAY 92- 4 97- 7 92-12 97-13 94-17 92- 2 89- 9 99-19 97-30 95-25 88-15 94- 7 92- 4 MIN. QNH PRESSURE IN HPA 1005.1 1003.7 1003.4 1002.6 1003.4 997.8 999.5 998.8 1005.8 1003.5 1006.9 1006.7 997.8 YEAR-DAY 3-28 88- 2 0-24 86-28 86- 3 88-30 87-27 86- 6 86- 6 86- 1 86- 8 86-27 88-30 MEAN QFF PRESSURE IN HPA 1024.0 1022.0 1018.5 1015.7 1011.5 1004.9 1001.2 1004.0 1010.2 1017.0 1021.6 1024.4 1014.6 MAX. QFF PRESSURE IN HPA 1038.3 1036.4 1032.4 1028.4 1020.8 1016.2 1009.5 1011.0 1019.9 1026.3 1030.8 1036.8 1038.3 YEAR-DAY 92- 4 97- 7 92-12 97-13 95- 8 92- 2 96- 3 2-30 97-30 95-25 1-20 94- 7 92- 4 MIN. QFF PRESSURE IN HPA 1005.1 1003.7 1002.4 1001.5 1001.5 993.0 994.0 993.3 1001.8 999.6 1006.1 1005.7 993.0 YEAR-DAY 3-28 88- 2 0-24 88-25 87-30 88-30 87-27 86- 6 86- 6 86- 1 86- 8 86-27 88-30 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 958.1 956.7 954.2 953.0 950.5 945.7 942.6 944.7 949.7 954.8 957.6 958.9 952.2 MAX. QFE PRESSURE IN HPA 970.4 968.6 965.7 963.0 958.2 953.5 950.6 950.8 957.8 961.8 966.0 968.2 970.4 YEAR-DAY 92- 4 2- 1 90- 9 97-13 94-17 2- 7 96- 3 99-19 97-30 93-30 88-15 88-29 92- 4 MIN. QFE PRESSURE IN HPA 942.5 940.9 938.5 939.8 940.6 934.7 936.2 934.5 939.7 940.7 943.0 942.3 934.5 YEAR-DAY 3-28 88- 1 87-13 88-25 86- 3 88-30 86-21 86- 5 86-10 86- 1 86- 8 86-27 86- 5 MEAN QNH PRESSURE IN HPA 1022.1 1020.6 1018.0 1016.7 1014.1 1009.0 1005.7 1007.9 1013.2 1018.6 1021.5 1022.9 1015.9 MAX. QNH PRESSURE IN HPA 1035.0 1033.1 1030.1 1027.2 1022.2 1017.2 1014.2 1014.4 1021.7 1026.0 1030.4 1032.7 1035.0 YEAR-DAY 92- 4 2- 1 90- 9 97-13 94-17 2- 7 96- 3 99-19 97-30 93-30 88-15 88-29 92- 4 MIN. QNH PRESSURE IN HPA 1005.6 1003.9 1001.4 1002.8 1003.6 997.4 999.0 997.2 1002.7 1003.7 1006.1 1005.4 997.2 YEAR-DAY 3-28 88- 1 87-13 88-25 86- 3 88-30 86-21 86- 5 86-10 86- 1 86- 8 86-27 86- 5 MEAN QFF PRESSURE IN HPA 1023.4 1022.1 1018.8 1016.0 1011.9 1005.7 1001.4 1004.0 1010.2 1016.6 1021.1 1023.9 1014.6 MAX. QFF PRESSURE IN HPA 1038.1 1035.5 1031.2 1028.0 1020.6 1014.3 1009.7 1010.4 1019.1 1024.6 1029.9 1035.2 1038.1 YEAR-DAY 92- 4 97- 7 92-12 97-13 94-17 2- 7 96- 3 2-29 97-30 93-30 1-20 94- 7 92- 4 MIN. QFF PRESSURE IN HPA 1005.8 1005.8 1001.7 1005.5 1002.3 996.4 994.0 997.0 1001.4 1009.6 1008.6 1006.8 994.0 YEAR-DAY 3-28 92-24 0-24 3-20 1-29 3-30 95-21 2-14 94- 1 3-27 3- 9 2-21 95-21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 956.9 955.3 953.0 952.0 949.5 944.8 941.7 943.8 948.6 953.7 956.5 957.9 951.1 MAX. QFE PRESSURE IN HPA 970.0 967.4 964.3 961.4 957.5 954.9 949.9 950.1 956.3 960.7 965.6 967.7 970.0 YEAR-DAY 92- 4 2- 1 92-12 89- 1 93-14 92- 1 96- 3 2-30 94-23 93-30 88-14 94- 6 92- 4 MIN. QFE PRESSURE IN HPA 941.9 939.4 936.3 937.1 937.6 934.1 934.7 933.6 937.8 940.4 942.6 941.5 933.6 YEAR-DAY 3-28 88- 1 88- 8 86-25 86- 3 88-30 86-21 86- 5 86-10 86- 1 86- 8 86-27 86- 5 MEAN QNH PRESSURE IN HPA 1020.8 1019.2 1016.6 1015.6 1013.0 1008.0 1004.8 1006.9 1012.1 1017.4 1020.4 1021.8 1014.7 MAX. QNH PRESSURE IN HPA 1034.6 1031.9 1028.6 1025.5 1021.4 1018.7 1013.4 1013.6 1020.2 1024.8 1030.0 1032.2 1034.6 YEAR-DAY 92- 4 2- 1 92-12 89- 1 93-14 92- 1 96- 3 2-30 94-23 93-30 88-14 94- 6 92- 4 MIN. QNH PRESSURE IN HPA 1005.0 1002.3 999.1 999.9 1000.4 996.8 997.4 996.2 1000.7 1003.4 1005.7 1004.6 996.2 YEAR-DAY 3-28 88- 1 88- 8 86-25 86- 3 88-30 86-21 86- 5 86-10 86- 1 86- 8 86-27 86- 5 MEAN QFF PRESSURE IN HPA 1022.1 1020.5 1017.4 1014.8 1010.9 1004.9 1000.6 1003.0 1009.1 1015.5 1020.0 1022.8 1013.5 MAX. QFF PRESSURE IN HPA 1037.5 1033.1 1029.5 1026.8 1019.8 1016.3 1009.1 1010.0 1017.7 1023.5 1028.5 1034.9 1037.5 YEAR-DAY 92- 4 2- 1 92-12 97-12 93-14 92- 1 96- 3 2-30 97-30 93-30 1-20 94- 6 92- 4 MIN. QFF PRESSURE IN HPA 1004.7 1007.1 1001.8 1004.3 1000.4 996.2 992.2 996.9 1000.3 1008.4 1007.2 1007.8 992.2 YEAR-DAY 3-28 3-19 3-25 3-20 1- 2 3-30 99-13 0-11 94- 1 3- 1 3- 9 2-20 99-13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 957.4 955.6 953.0 951.6 949.0 944.3 941.3 943.5 948.5 953.9 956.9 958.3 951.1 MAX. QFE PRESSURE IN HPA 970.7 967.5 964.3 962.2 957.3 953.7 949.0 949.6 957.0 960.5 966.1 968.6 970.7 YEAR-DAY 92- 4 2- 1 90- 9 89- 1 93-14 92- 1 96- 3 2-29 94-23 93-30 88-14 94- 6 92- 4 MIN. QFE PRESSURE IN HPA 942.2 938.9 937.1 937.1 936.0 933.8 934.3 932.0 940.3 940.0 942.8 942.3 932.0 YEAR-DAY 92-30 88- 1 88- 8 86-25 86- 3 88-30 87-27 86- 5 86- 5 86- 1 86- 8 88-25 86- 5 MEAN QNH PRESSURE IN HPA 1021.3 1019.4 1016.7 1015.2 1012.5 1007.5 1004.4 1006.6 1011.9 1017.6 1020.8 1022.2 1014.7 MAX. QNH PRESSURE IN HPA 1035.3 1032.0 1028.6 1026.4 1021.2 1017.4 1012.5 1013.1 1020.9 1024.6 1030.5 1033.1 1035.3 YEAR-DAY 92- 4 2- 1 90- 9 89- 1 93-14 92- 1 96- 3 2-29 94-23 93-30 88-14 94- 6 92- 4 MIN. QNH PRESSURE IN HPA 1005.3 1001.8 999.9 999.9 998.8 996.4 997.0 994.5 1003.3 1003.0 1005.9 1005.4 994.5 YEAR-DAY 92-30 88- 1 88- 8 86-25 86- 3 88-30 87-27 86- 5 86- 5 86- 1 86- 8 88-25 86- 5 MEAN QFF PRESSURE IN HPA 1022.5 1020.3 1016.7 1014.0 1009.9 1003.8 1000.0 1002.5 1008.8 1015.6 1020.5 1023.0 1013.1 MAX. QFF PRESSURE IN HPA 1038.7 1033.5 1029.3 1026.8 1019.8 1015.3 1008.3 1009.7 1018.1 1023.9 1033.2 1036.1 1038.7 YEAR-DAY 92- 4 2- 1 92-12 97-12 93-14 92- 1 96- 3 2-30 92-28 93-30 88-14 94- 6 92- 4 MIN. QFF PRESSURE IN HPA 1007.0 1001.5 999.4 998.6 997.8 992.4 991.5 989.7 999.0 999.2 1005.1 1005.4 989.7 YEAR-DAY 3-28 88- 1 88- 8 86-25 86- 3 88-30 87-27 86- 5 86- 5 86- 1 86- 8 86-27 86- 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 958.1 956.5 954.0 952.7 950.1 945.0 942.4 944.9 949.6 954.6 957.3 958.9 952.0 MAX. QFE PRESSURE IN HPA 971.2 968.2 963.5 962.1 958.0 952.8 951.0 950.9 957.9 961.8 965.4 969.0 971.2 YEAR-DAY 92- 4 2- 1 92-11 97-12 93-14 92- 1 96- 3 2-29 94-23 95-24 96-15 94- 6 92- 4 MIN. QFE PRESSURE IN HPA 942.6 939.4 938.4 941.8 940.9 934.6 934.8 933.6 941.7 941.1 943.6 944.1 933.6 YEAR-DAY 97-15 88- 1 88- 8 88-29 87-29 88-30 87-27 86- 5 87-11 86- 1 86-29 2-20 86- 5 MEAN QNH PRESSURE IN HPA 1022.0 1020.3 1017.7 1016.4 1013.6 1008.3 1005.5 1008.1 1013.1 1018.3 1021.2 1022.9 1015.6 MAX. QNH PRESSURE IN HPA 1035.9 1032.7 1027.7 1026.3 1021.9 1016.5 1014.6 1014.5 1021.8 1026.0 1029.7 1033.5 1035.9 YEAR-DAY 92- 4 2- 1 92-11 97-12 93-14 92- 1 96- 3 2-29 94-23 95-24 96-15 94- 6 92- 4 MIN. QNH PRESSURE IN HPA 1005.7 1002.3 1001.3 1004.9 1003.9 997.3 997.5 996.2 1004.8 1004.1 1006.8 1007.3 996.2 YEAR-DAY 97-15 88- 1 88- 8 88-29 87-29 88-30 87-27 86- 5 87-11 86- 1 86-29 2-20 86- 5 MEAN QFF PRESSURE IN HPA 1023.3 1021.2 1017.8 1015.0 1010.7 1004.1 1000.7 1003.6 1009.6 1016.2 1020.9 1023.8 1013.9 MAX. QFF PRESSURE IN HPA 1039.3 1034.5 1029.7 1027.5 1020.2 1013.5 1009.8 1010.6 1019.2 1024.9 1030.4 1036.5 1039.3 YEAR-DAY 92- 4 2- 1 92-11 97-12 93-14 92- 1 96- 3 2-29 92-28 0-28 1-19 94- 6 92- 4 MIN. QFF PRESSURE IN HPA 1005.4 1001.7 1000.5 1002.4 999.8 992.6 992.1 990.9 1000.7 999.9 1006.5 1006.7 990.9 YEAR-DAY 97-15 88- 1 88- 8 88-29 88-31 88-30 87-27 86- 5 87-11 86- 1 86-29 2-20 86- 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 958.7 957.4 955.0 953.4 951.1 946.4 943.2 945.5 950.2 955.2 958.0 959.6 952.8 MAX. QFE PRESSURE IN HPA 970.5 967.9 964.6 962.5 957.8 953.2 951.0 951.4 958.0 961.8 965.3 969.5 970.5 YEAR-DAY 92- 4 2- 1 92-11 97-12 99- 1 2- 6 96- 3 1-20 97-29 95-24 96-15 94- 6 92- 4 MIN. QFE PRESSURE IN HPA 944.4 944.4 939.1 943.1 943.8 938.9 936.7 940.0 943.1 948.2 945.1 943.8 936.7 YEAR-DAY 93- 7 3-19 3-25 99- 7 94-31 98-30 99-13 0-11 96-21 3- 1 1-17 2-20 99-13 MEAN QNH PRESSURE IN HPA 1022.6 1021.3 1018.7 1017.1 1014.7 1009.7 1006.4 1008.7 1013.8 1019.0 1021.9 1023.6 1016.5 MAX. QNH PRESSURE IN HPA 1035.1 1032.4 1028.9 1026.7 1021.7 1016.9 1014.6 1015.0 1021.9 1026.0 1029.6 1034.1 1035.1 YEAR-DAY 92- 4 2- 1 92-11 97-12 99- 1 2- 6 96- 3 1-20 97-29 95-24 96-15 94- 6 92- 4 MIN. QNH PRESSURE IN HPA 1007.6 1007.6 1002.0 1006.2 1007.0 1001.8 999.5 1003.0 1006.2 1011.6 1008.4 1007.0 999.5 YEAR-DAY 93- 7 3-19 3-25 99- 7 94-31 98-30 99-13 0-11 96-21 3- 1 1-17 2-20 99-13 MEAN QFF PRESSURE IN HPA 1023.4 1021.8 1018.5 1015.6 1011.7 1005.6 1001.6 1004.1 1010.1 1016.5 1021.1 1024.0 1014.5 MAX. QFF PRESSURE IN HPA 1038.3 1034.5 1030.5 1027.9 1020.2 1013.7 1010.0 1010.6 1019.2 1024.5 1030.3 1037.1 1038.3 YEAR-DAY 92- 4 97- 6 92-11 97-12 95- 8 2- 3 96- 3 93-18 97-29 0-28 1-19 94- 6 92- 4 MIN. QFF PRESSURE IN HPA 1006.5 1006.6 999.7 1004.1 1002.5 996.9 994.4 997.6 1002.0 1008.0 1006.7 1006.1 994.4 YEAR-DAY 93- 7 95- 4 3-25 3-25 94-31 98-30 99-13 2-13 94- 1 3- 1 1-17 2-20 99-13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 1 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 9.4 10.2 13.2 19.6 24.4 30.1 36.0 35.7 31.8 24.7 13.0 8.8 21.4 1987 9.3 12.3 11.6 18.0 27.1 32.0 35.0 34.0 29.7 21.6 16.1 10.5 21.4 1988 8.0 9.9 12.9 18.3 26.0 31.5 ***** ***** ***** 24.9 14.9 10.6 ****** 1989 5.4 8.7 14.7 22.1 27.8 32.3 36.5 34.4 29.9 25.6 16.3 9.9 22.0 1990 7.0 9.1 14.4 18.5 27.1 33.0 36.5 33.5 29.9 23.7 18.1 12.3 21.9 1991 9.0 9.2 14.2 20.8 25.3 33.9 35.3 30.9 26.8 21.4 15.8 8.9 21.0 1992 4.5 6.4 9.0 15.8 21.3 27.6 30.7 31.5 26.9 20.5 13.8 7.5 18.0 1993 6.5 8.0 11.5 16.6 22.2 28.9 33.2 31.6 27.2 22.1 12.7 10.4 19.3 1994 10.0 8.9 13.1 19.7 24.4 29.3 32.3 30.5 29.2 22.7 13.7 6.1 20.0 1995 8.9 9.9 12.7 16.6 24.7 29.4 31.0 30.9 26.3 20.5 12.9 7.7 19.3 1996 8.9 10.9 11.7 16.8 25.3 29.7 34.8 32.1 27.1 21.3 15.1 12.1 20.5 1997 8.5 6.3 9.9 16.0 24.7 30.1 31.4 30.2 26.3 21.4 14.3 9.1 19.0 1998 5.8 8.8 11.8 17.9 24.3 31.9 33.8 33.6 27.7 22.4 17.3 12.0 20.6 1999 9.6 10.4 13.5 18.3 26.0 30.9 33.0 33.5 27.2 22.8 13.7 10.4 20.8 2000 7.1 8.3 12.0 20.5 25.4 30.3 35.8 33.1 26.9 19.9 13.8 9.6 20.2 2001 8.1 9.4 15.0 18.2 23.8 30.0 33.1 33.0 28.5 22.6 13.9 11.2 20.6 2002 7.5 10.0 13.8 16.7 23.2 30.2 33.2 31.3 28.0 23.6 15.2 8.7 20.1 2003 8.9 9.3 12.1 17.9 24.5 30.3 32.1 33.0 27.0 23.2 14.1 9.8 20.2 MEAN 7.9 9.2 12.6 18.2 24.9 30.6 33.7 32.5 28.0 22.5 14.7 9.8 20.4 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 2 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M AVERAGE OF MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 2.9 4.3 6.4 11.1 12.8 17.0 22.7 22.1 19.0 14.4 7.7 2.8 11.9 1987 1.7 5.0 6.0 8.1 15.0 18.6 23.0 21.6 18.1 14.3 8.2 6.0 12.1 1988 2.9 4.2 6.5 9.7 13.6 18.5 ***** ***** ***** 14.5 6.4 4.3 ****** 1989 -1.0 1.4 7.9 11.7 14.7 16.8 20.7 19.6 16.5 14.3 9.3 4.1 11.3 1990 2.3 2.8 5.6 9.1 13.6 17.5 22.1 18.6 14.7 12.3 7.9 4.0 10.9 1991 3.2 1.9 6.8 10.5 13.5 19.3 20.8 20.2 16.0 13.8 8.3 4.7 11.6 1992 0.6 2.1 3.6 9.1 13.2 17.7 19.3 21.1 16.7 10.8 7.7 3.3 10.4 1993 1.2 2.0 4.4 9.9 14.5 17.6 21.3 20.0 15.5 14.1 7.7 5.6 11.1 1994 5.3 3.7 6.7 12.1 14.6 18.1 21.3 19.5 20.0 16.0 9.4 2.1 12.4 1995 3.3 4.1 6.2 9.3 16.5 18.9 20.3 19.8 16.6 11.2 5.9 1.8 11.2 1996 5.0 5.6 6.4 9.6 15.8 18.7 25.0 21.0 17.3 12.8 8.3 7.3 12.7 1997 3.4 -0.1 4.3 8.9 15.4 19.5 20.4 19.6 16.3 13.8 9.5 5.0 11.3 1998 2.2 4.4 6.1 10.2 14.8 20.6 24.0 23.0 17.9 13.5 10.1 5.8 12.7 1999 5.0 4.5 6.3 9.8 15.3 20.2 23.0 23.1 17.1 14.2 6.9 4.2 12.5 2000 2.1 1.5 4.2 13.0 15.8 20.1 25.8 22.7 17.5 11.9 7.1 5.4 12.2 2001 2.2 3.1 7.9 9.7 12.7 18.4 22.2 22.4 18.8 14.5 6.9 6.6 12.1 2002 3.1 3.4 6.7 10.0 12.8 19.1 22.3 20.6 17.6 15.3 9.4 4.7 12.1 2003 3.7 4.4 5.8 10.6 14.2 19.0 21.2 22.0 16.6 14.8 7.9 5.4 12.1 MEAN 2.7 3.2 6.0 10.1 14.4 18.6 22.1 21.0 17.2 13.7 8.0 4.6 11.8 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 3 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M AVERAGE OF MAXIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 14.6 14.8 17.9 24.7 30.1 36.6 43.2 42.6 39.2 31.1 18.0 13.8 27.2 1987 16.2 18.4 15.9 24.5 34.2 39.0 41.5 40.8 37.0 27.0 22.6 14.9 27.7 1988 12.3 14.4 18.0 24.2 32.7 37.6 ***** ***** ***** 32.0 21.4 15.4 ****** 1989 10.3 13.7 19.3 27.8 33.3 38.6 43.4 41.3 36.4 31.6 21.3 14.4 27.6 1990 10.8 13.6 19.5 23.8 33.0 39.1 42.6 40.4 37.5 30.2 24.7 17.9 27.7 1991 13.2 13.8 18.6 25.9 30.7 39.5 41.6 40.6 37.2 29.7 24.3 14.1 27.4 1992 9.1 10.8 14.7 22.5 28.9 36.8 40.7 40.8 37.0 31.0 21.1 12.4 25.5 1993 12.7 14.3 18.6 24.1 29.9 38.1 43.0 41.6 38.2 31.0 19.3 17.1 27.3 1994 15.6 15.1 19.9 27.8 32.9 38.6 41.2 40.6 37.7 30.3 19.5 11.6 27.6 1995 15.6 16.4 20.0 23.8 32.9 38.3 40.6 41.9 36.7 30.5 22.0 14.7 27.8 1996 13.9 16.9 17.8 24.1 34.3 38.8 43.6 42.1 36.9 30.4 22.9 18.2 28.3 1997 14.9 13.5 15.6 23.1 32.9 38.7 40.9 39.9 36.2 30.0 20.7 14.4 26.7 1998 10.9 14.3 18.0 25.8 33.1 41.0 42.4 43.6 37.7 32.0 26.6 20.2 28.8 1999 15.5 17.5 20.4 26.8 35.1 39.3 41.2 43.3 37.0 32.0 21.6 18.1 29.0 2000 13.1 15.8 19.7 28.2 33.8 39.4 44.6 42.8 36.7 28.7 21.7 15.2 28.3 2001 15.5 16.3 22.7 27.2 33.3 39.5 42.5 43.1 38.1 31.8 22.1 16.8 29.1 2002 13.2 17.4 21.7 23.6 32.5 38.9 42.2 41.0 38.6 33.3 22.5 13.9 28.2 2003 15.5 14.9 18.7 25.3 33.9 39.4 41.6 43.4 37.1 32.5 21.9 15.8 28.3 MEAN 13.5 15.1 18.7 25.2 32.6 38.7 42.2 41.8 37.4 30.8 21.9 15.5 27.8 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 4 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 11.7 10.5 11.5 13.6 17.3 19.6 20.5 20.5 20.2 16.7 10.3 11.0 15.3 1987 14.5 13.4 9.9 16.4 19.2 20.4 18.5 19.2 18.9 12.7 14.4 8.9 15.6 1988 9.4 10.2 11.5 14.5 19.1 19.1 ***** ***** ***** 17.5 15.0 11.1 ****** 1989 11.3 12.3 11.4 16.1 18.6 21.8 22.7 21.7 19.9 17.3 12.0 10.3 16.3 1990 8.5 10.8 13.9 14.7 19.4 21.6 20.5 21.8 22.8 17.9 16.8 13.9 16.8 1991 10.0 11.9 11.8 15.4 17.2 20.2 20.8 20.4 21.2 15.9 16.0 9.4 15.8 1992 8.5 8.7 11.1 13.4 15.7 19.1 21.4 19.7 20.3 20.2 13.4 9.1 15.1 1993 11.5 12.3 14.2 14.2 15.4 20.5 21.7 21.6 22.7 16.9 11.6 11.5 16.2 1994 10.3 11.4 13.2 15.7 18.3 20.5 19.9 21.1 17.7 14.3 10.1 9.5 15.2 1995 12.3 12.3 13.8 14.5 16.4 19.4 20.3 22.1 20.1 19.3 16.1 12.9 16.6 1996 8.9 11.3 11.4 14.5 18.5 20.1 18.6 21.1 19.6 17.6 14.6 10.9 15.6 1997 11.5 13.6 11.3 14.2 17.5 19.2 20.5 20.3 19.9 16.2 11.2 9.4 15.4 1998 8.7 9.9 11.9 15.6 18.3 20.4 18.4 20.6 19.8 18.5 16.5 14.4 16.1 1999 10.5 13.0 14.1 17.0 19.8 19.1 18.2 20.2 19.9 17.8 14.7 13.9 16.5 2000 11.0 14.3 15.5 15.2 18.0 19.3 18.8 20.1 19.2 16.8 14.6 9.8 16.1 2001 13.3 13.2 14.8 17.5 20.6 21.1 20.3 20.7 19.3 17.3 15.2 10.2 17.0 2002 10.1 14.0 15.0 13.6 19.7 19.8 19.9 20.4 21.0 18.0 13.1 9.2 16.1 2003 11.8 10.5 12.9 14.7 19.7 20.4 20.4 21.4 20.5 17.7 14.0 10.4 16.2 MEAN 10.8 11.9 12.7 15.1 18.2 20.1 20.1 20.8 20.2 17.1 13.9 10.9 16.0 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 5 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M AVERAGE OF MEAN DAILY TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 8.7 9.6 12.1 17.9 21.4 26.8 32.9 32.3 29.1 22.8 12.8 8.3 19.6 1987 9.0 11.7 11.0 16.3 24.6 28.8 32.3 31.2 27.5 20.7 15.4 10.4 19.9 1988 7.6 9.3 12.2 17.0 23.2 28.1 ***** ***** ***** 23.2 13.9 9.8 ****** 1989 4.7 7.5 13.6 19.8 24.0 27.7 32.1 30.4 26.4 22.9 15.3 9.3 19.5 1990 6.5 8.2 12.6 16.4 23.3 28.3 32.3 29.5 26.1 21.2 16.3 10.9 19.3 1991 8.2 7.8 12.7 18.2 22.1 29.4 31.2 30.4 26.6 21.8 16.3 9.4 19.5 1992 4.8 6.5 9.2 15.8 21.0 27.3 30.0 31.0 26.8 20.9 14.4 7.8 18.0 1993 6.9 8.1 11.5 17.0 22.2 27.9 32.1 30.8 26.9 22.5 13.5 11.3 19.2 1994 10.5 9.4 13.3 19.9 23.8 28.4 31.3 30.0 28.9 23.1 14.4 6.8 20.0 1995 9.4 10.2 13.1 16.5 24.7 28.6 30.4 30.8 26.6 20.8 14.0 8.3 19.5 1996 9.4 11.3 12.1 16.9 25.0 28.8 34.3 31.5 27.1 21.6 15.6 12.8 20.5 1997 9.2 6.7 10.0 16.0 24.1 29.1 30.7 29.7 26.2 21.9 15.1 9.7 19.0 1998 6.5 9.4 12.1 18.0 24.0 30.8 33.2 33.3 27.8 22.8 18.3 13.0 20.8 1999 10.2 11.0 13.4 18.3 25.2 29.7 32.1 33.2 27.1 23.1 14.2 11.1 20.7 2000 7.6 8.6 12.0 20.6 24.8 29.7 35.2 32.7 27.1 20.3 14.4 10.3 20.3 2001 8.9 9.7 15.3 18.5 23.0 29.0 32.3 32.7 28.5 23.2 14.5 11.7 20.6 2002 8.1 10.4 14.2 16.8 22.6 29.0 32.2 30.8 28.1 24.3 15.9 9.3 20.2 2003 9.6 9.7 12.2 18.0 24.1 29.2 31.4 32.7 26.9 23.6 14.9 10.6 20.2 MEAN 8.1 9.2 12.4 17.7 23.5 28.7 32.1 31.4 27.3 22.3 15.0 10.1 19.8 SD 1.68 1.50 1.44 1.40 1.24 0.96 1.31 1.24 0.90 1.15 1.26 1.64 1.31 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 6 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M TEMPERATURE RECORDS LOWEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 -3.8 0.5 0.2 4.0 8.5 13.0 16.0 19.0 15.0 7.0 2.0 -2.4 -3.8 DAY 20 2 3 4 14 1 1 16 7 25 15 5 1987 -1.0 0.0 0.5 1.5 9.5 14.0 19.0 16.2 14.2 8.5 2.0 -1.6 -1.6 DAY 2 12 21 22 3 3 10 28 21 9 11 31 1988 -1.8 -0.6 -0.6 1.4 8.0 14.0 ***** ***** ***** 8.0 -5.6 -4.0 ****** DAY 1 26 6 2 11 7 ** ** ** 31 15 29 1989 -5.5 -3.0 0.5 5.2 10.0 9.8 17.8 17.0 12.5 7.4 1.0 0.5 -5.5 DAY 5 16 30 2 9 11 10 27 29 24 22 17 1990 -2.6 -1.2 0.8 4.2 6.4 14.0 17.6 16.0 11.0 7.6 3.0 -2.5 -2.6 DAY 26 1 17 5 7 6 3 25 19 18 13 27 1991 -2.2 -6.0 0.0 5.0 6.6 13.4 18.4 16.0 12.0 6.0 3.8 -1.0 -6.0 DAY 28 10 10 13 3 1 7 27 26 30 26 21 1992 -10.0 -8.6 -2.0 4.2 8.0 14.0 15.5 17.4 7.2 6.0 -2.0 -4.0 -10.0 DAY 25 29 2 7 4 5 1 25 29 28 27 28 1993 -3.6 -5.5 -0.5 4.4 8.6 14.2 17.0 16.5 9.5 11.2 -0.8 1.6 -5.5 DAY 18 16 15 13 4 5 2 16 25 30 29 5 1994 0.2 -2.2 1.4 5.0 8.8 13.0 17.0 16.2 17.0 12.6 3.2 -4.2 -4.2 DAY 28 4 17 4 18 5 1 20 30 13 11 7 1995 -1.8 1.0 1.2 3.2 5.8 15.6 17.4 17.0 11.0 7.8 -3.4 -2.0 -3.4 DAY 23 10 28 6 9 6 3 27 21 17 27 21 1996 -0.2 -0.6 2.6 5.0 9.4 11.4 20.2 17.0 13.4 5.0 4.8 2.4 -0.6 DAY 21 6 5 26 2 7 7 27 23 31 5 19 1997 -4.8 -6.8 -2.2 -0.4 6.6 12.4 17.8 17.4 13.6 8.4 3.6 0.0 -6.8 DAY 30 7 8 12 6 4 12 15 14 24 29 27 1998 -2.4 -1.4 -0.2 6.2 8.2 15.2 18.6 19.6 14.0 8.6 6.4 1.6 -2.4 DAY 17 18 26 25 1 3 8 23 27 26 18 20 1999 0.6 -1.0 1.0 4.6 8.6 15.6 18.4 20.4 13.2 10.8 -1.6 -0.8 -1.6 DAY 22 22 26 10 2 5 3 27 26 19 29 5 2000 -2.4 -2.4 -2.0 3.8 10.6 15.2 21.0 15.8 14.4 6.0 0.8 1.0 -2.4 DAY 22 6 16 11 13 23 3 31 2 29 28 28 2001 -3.0 -2.4 2.8 5.0 8.6 14.6 17.8 18.4 15.6 7.4 -0.8 -2.0 -3.0 DAY 29 1 1 16 10 2 4 24 3 31 24 22 2002 -2.4 -2.0 -0.5 3.6 8.8 12.4 19.6 16.4 14.6 8.8 3.2 -2.6 -2.6 DAY 26 28 1 5 1 4 1 30 28 25 29 14 2003 -0.6 -0.4 -2.4 1.6 6.0 13.4 19.0 18.6 13.2 5.0 1.4 -2.0 -2.4 DAY 20 28 2 2 8 7 30 27 8 31 19 22 1986-2003 -10.0 -8.6 -2.4 -0.4 5.8 9.8 15.5 15.8 7.2 5.0 -5.6 -4.2 -10.0 YEAR-DAY 92-25 92-29 3- 2 97-12 95- 9 89-11 92- 1 0-31 92-29 96-31 88-15 94- 7 92 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 7 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M TEMPERATURE RECORDS HIGHEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 18.5 20.0 25.0 29.0 37.5 40.5 47.0 47.5 42.0 36.0 30.0 21.0 47.5 DAY 4 24 28 24 28 26 4 1 5 1 1 26 1987 22.5 26.0 22.0 35.0 39.0 44.0 44.0 45.0 40.6 35.5 27.7 21.2 45.0 DAY 23 2 8 30 21 27 23 3 5 2 18 1 1988 18.0 19.6 25.4 31.4 40.0 44.0 ***** ***** ***** 37.0 30.0 25.2 ****** DAY 10 22 30 17 31 13 ** ** ** 2 7 8 1989 16.0 23.0 29.6 31.0 39.6 43.6 46.0 43.2 41.6 37.6 26.6 17.8 46.0 DAY 21 28 7 27 24 28 30 9 1 6 29 21 1990 13.8 19.0 25.4 31.8 40.6 44.0 46.6 43.2 40.2 34.8 29.8 27.0 46.6 DAY 14 18 31 27 24 24 19 3 5 6 3 4 1991 17.2 21.0 25.6 33.8 35.4 44.6 44.4 45.5 41.5 34.5 31.0 20.4 45.5 DAY 6 25 31 25 9 24 21 2 2 9 2 9 1992 13.4 16.2 22.4 28.6 38.6 40.2 43.6 44.2 41.4 34.2 29.5 19.6 44.2 DAY 21 24 29 12 30 29 8 16 2 4 4 15 1993 19.0 23.2 29.2 33.2 36.0 43.2 46.6 44.4 42.5 36.5 26.2 21.6 46.6 DAY 8 27 31 19 30 26 17 30 1 1 1 22 1994 20.0 20.0 27.2 34.0 42.6 43.4 43.8 44.2 41.0 34.5 26.6 15.6 44.2 DAY 1 27 31 22 31 9 2 14 1 8 2 2 1995 19.8 20.0 25.4 31.2 38.6 43.0 43.4 44.8 44.6 37.8 29.6 18.8 44.8 DAY 8 1 31 30 24 20 4 2 1 2 1 2 1996 16.8 24.8 25.2 31.4 39.6 42.4 46.6 45.6 42.0 37.8 29.2 24.8 46.6 DAY 31 9 30 30 27 17 26 3 2 2 5 28 1997 21.8 22.4 20.8 33.0 39.8 43.6 44.4 42.2 40.4 35.6 25.6 20.0 44.4 DAY 9 21 3 27 28 28 9 11 1 16 8 8 1998 15.0 20.8 24.2 33.5 40.8 44.8 45.6 46.8 42.6 36.4 30.0 25.6 46.8 DAY 20 6 16 16 9 23 20 28 1 5 9 9 1999 20.2 21.4 30.2 34.0 42.8 43.6 43.8 46.6 42.2 39.0 27.2 25.6 46.6 DAY 7 28 31 30 30 1 19 31 3 3 4 31 2000 23.0 22.6 26.0 34.0 38.6 43.8 46.8 46.5 39.2 33.8 25.2 19.0 46.8 DAY 1 24 22 28 25 30 30 2 5 10 7 3 2001 19.6 23.2 29.0 33.0 39.8 43.8 47.2 47.0 41.6 37.4 32.8 22.8 47.2 DAY 9 28 30 30 28 22 24 4 4 4 5 29 2002 19.6 23.6 28.0 31.0 39.4 43.2 45.6 46.4 42.2 38.6 27.6 21.0 46.4 DAY 1 11 26 28 28 26 20 13 23 10 8 5 2003 21.4 21.8 24.4 32.0 37.6 42.6 45.0 48.8 42.8 37.8 31.6 19.4 48.8 DAY 14 3 6 5 26 25 4 11 4 7 7 17 1986-2003 23.0 26.0 30.2 35.0 42.8 44.8 47.2 48.8 44.6 39.0 32.8 27.0 48.8 YEAR-DAY 0- 1 87- 2 99-31 87-30 99-30 98-23 1-24 3-11 95- 1 99- 3 1- 5 90- 4 3 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 8 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M 0C COOLING DEGREE DAYS (BASE 21) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 0.0 0.0 0.0 3.1 51.9 168.3 357.9 351.8 242.5 66.6 1.5 0.0 1243.7 1987 0.0 0.0 0.0 2.2 113.7 235.0 349.0 315.3 196.2 36.8 0.1 0.0 1248.4 1988 0.0 0.0 0.0 1.2 87.0 212.6 ***** ***** ***** 84.1 0.9 0.0 ****** 1989 0.0 0.0 0.0 16.4 93.2 200.2 331.4 292.8 163.1 77.9 0.3 0.0 1175.4 1990 0.0 0.0 0.0 3.7 98.5 218.2 350.5 263.2 152.7 30.5 1.3 1.4 1120.2 1991 0.0 0.0 0.0 10.4 48.4 251.3 315.8 292.1 168.4 42.5 7.6 0.0 1136.7 1992 0.0 0.0 0.0 1.3 41.2 187.5 279.0 308.6 179.3 20.0 0.0 0.0 1017.0 1993 0.0 0.0 0.0 6.2 64.8 206.7 344.9 304.3 175.6 63.6 0.0 0.0 1166.3 1994 0.0 0.0 0.0 20.9 101.1 220.7 318.2 280.5 235.7 70.0 0.0 0.0 1247.1 1995 0.0 0.0 0.0 1.7 134.3 228.0 292.8 305.3 169.4 24.8 1.5 0.0 1157.8 1996 0.0 0.0 0.0 3.8 124.6 232.6 411.6 326.9 183.0 50.7 0.0 0.0 1333.4 1997 0.0 0.0 0.0 5.2 114.2 243.5 300.2 270.3 156.8 54.9 0.0 0.0 1145.2 1998 0.0 0.0 0.0 9.3 102.5 294.0 378.2 381.6 203.6 65.4 0.2 0.0 1434.9 1999 0.0 0.0 2.6 16.4 132.3 261.3 344.6 378.6 181.7 72.9 0.0 0.0 1390.4 2000 0.0 0.0 0.0 29.9 120.1 262.3 439.4 363.3 183.0 18.1 0.0 0.0 1416.3 2001 0.0 0.0 0.0 9.4 71.3 239.1 351.5 363.7 224.1 79.3 8.8 0.0 1347.3 2002 0.0 0.0 0.0 2.7 67.1 239.6 348.3 303.8 212.2 108.6 0.0 0.0 1282.3 2003 0.0 0.0 0.0 12.2 107.7 245.6 322.1 362.2 176.5 90.0 3.0 0.0 1319.4 MEAN 0.0 0.0 0.1 8.7 93.0 230.4 343.3 321.5 188.5 58.7 1.4 0.1 1245.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 9 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M 0C HEATING DEGREE DAYS (BASE 18) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 286.7 236.4 183.1 28.0 3.8 0.0 0.0 0.0 0.0 2.0 165.4 299.3 1204.7 1987 280.4 176.0 218.2 72.1 0.0 0.0 0.0 0.0 0.0 14.4 83.9 234.1 1079.1 1988 322.5 252.0 179.5 52.1 0.5 0.0 ***** ***** ***** 2.7 140.0 253.6 ****** 1989 412.9 293.5 139.4 16.3 0.0 0.0 0.0 0.0 0.0 4.1 87.0 271.0 1224.1 1990 355.9 274.9 168.9 67.7 3.9 0.0 0.0 0.0 0.0 4.5 69.8 224.8 1170.3 1991 303.3 260.7 165.1 38.3 1.5 0.0 0.0 0.0 0.0 1.6 73.1 266.1 1109.7 1992 408.0 333.6 273.7 73.9 3.8 0.0 0.0 0.0 0.0 3.7 110.7 314.6 1522.1 1993 342.6 276.5 200.6 51.5 2.3 0.0 0.0 0.0 0.0 4.0 140.4 207.4 1225.2 1994 233.9 240.8 146.6 12.8 0.2 0.0 0.0 0.0 0.0 0.0 111.3 345.8 1091.4 1995 265.3 217.3 151.8 56.2 4.8 0.0 0.0 0.0 0.0 0.5 133.5 302.0 1131.3 1996 265.4 195.6 183.8 52.7 0.0 0.0 0.0 0.0 0.0 9.3 73.2 163.4 943.3 1997 273.8 316.3 248.9 84.4 5.2 0.0 0.0 0.0 0.0 4.6 92.7 257.6 1283.5 1998 355.3 241.5 184.3 41.9 0.7 0.0 0.0 0.0 0.0 1.2 8.4 156.0 989.1 1999 240.8 194.9 148.8 35.8 0.0 0.0 0.0 0.0 0.0 0.0 114.4 212.5 947.1 2000 322.5 271.3 190.4 10.4 0.0 0.0 0.0 0.0 0.0 9.1 108.5 238.9 1151.0 2001 283.1 232.8 87.4 27.2 0.0 0.0 0.0 0.0 0.0 2.4 128.2 196.1 957.2 2002 306.1 212.1 119.1 59.7 0.0 0.0 0.0 0.0 0.0 0.0 68.9 269.4 1035.2 2003 260.5 233.6 179.5 38.9 2.0 0.0 0.0 0.0 0.0 4.1 110.9 229.1 1058.6 MEAN 306.6 247.8 176.0 45.5 1.6 0.0 0.0 0.0 0.0 3.8 101.1 246.8 1129.2 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 10 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 0.6 3.8 4.2 10.2 7.3 3.0 8.4 4.2 1.6 4.5 5.7 0.0 4.4 1987 -0.1 2.9 5.0 6.2 5.5 1.1 5.4 4.0 3.8 7.6 3.5 3.9 4.1 1988 2.6 3.0 5.2 8.7 4.6 5.5 ***** ***** ***** 6.8 2.1 1.9 ****** 1989 -1.8 -2.8 6.6 9.2 7.9 7.3 10.6 9.9 7.9 7.3 8.0 4.9 6.3 1990 1.4 2.8 4.5 7.9 7.0 6.4 13.3 18.5 6.2 6.8 5.2 2.0 6.8 1991 3.8 0.7 7.2 9.6 7.6 15.6 12.9 9.1 5.1 8.7 3.4 3.7 7.3 1992 -0.6 0.5 2.1 6.3 9.6 7.7 5.6 7.4 5.2 3.0 5.0 3.6 4.6 1993 0.0 1.3 2.5 8.7 10.4 5.1 8.3 6.8 1.2 3.9 6.4 6.1 5.1 1994 4.9 2.5 5.5 8.4 5.1 2.2 7.6 5.5 4.9 7.5 8.9 1.2 5.3 1995 3.8 3.8 5.5 8.7 8.8 7.3 7.1 6.1 6.1 1.8 1.3 0.6 5.1 1996 2.3 4.9 6.0 8.1 8.2 4.7 5.7 5.9 5.3 3.9 1.7 5.3 5.2 1997 2.7 -1.9 3.1 7.3 7.7 4.2 6.0 7.0 3.5 7.2 8.4 5.4 5.1 1998 2.5 3.2 6.2 9.4 7.6 5.4 8.1 7.4 6.5 2.7 4.8 1.7 5.5 1999 2.7 3.6 3.3 6.2 4.1 5.4 7.5 7.6 6.9 6.5 3.8 2.6 5.0 2000 1.2 -0.5 0.7 6.6 5.2 3.0 6.9 6.5 6.9 6.2 4.3 5.6 4.4 2001 1.4 2.7 7.3 8.3 6.3 5.7 7.7 8.3 6.1 6.4 5.1 7.7 6.1 2002 3.0 2.8 5.3 9.9 7.4 4.7 9.3 6.1 6.3 6.0 6.5 4.7 6.0 2003 4.0 3.4 4.4 9.1 7.7 5.7 7.0 8.2 6.0 6.6 4.1 4.4 5.9 MEAN 1.9 2.0 4.7 8.3 7.1 5.6 8.1 7.6 5.3 5.7 4.9 3.6 5.4 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 11 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 4.32 5.38 5.69 8.42 7.12 5.25 7.84 5.82 4.78 5.76 6.23 4.21 5.90 1987 4.10 5.09 5.96 6.58 6.40 4.58 6.19 5.61 5.53 7.34 5.45 5.53 5.70 1988 4.96 5.12 5.95 7.85 5.80 6.52 ***** ***** ***** 6.71 5.09 4.78 ***** 1989 3.56 3.60 6.55 7.86 7.19 6.85 8.91 8.29 7.21 6.87 7.21 5.79 6.66 1990 4.57 4.98 5.75 7.21 6.83 6.51 11.01 14.89 6.70 6.63 5.94 4.83 7.15 1991 5.36 4.52 6.92 8.13 7.07 12.57 10.11 7.88 5.90 7.59 5.26 5.36 7.22 1992 4.00 4.25 4.92 6.42 8.08 7.14 6.24 6.99 5.97 5.04 6.08 5.37 5.87 1993 4.18 4.57 4.95 7.58 8.53 5.94 7.45 6.68 4.54 5.54 6.59 6.23 6.07 1994 5.87 4.90 6.02 7.53 6.01 4.94 7.19 6.26 6.10 7.26 7.73 4.52 6.19 1995 5.35 5.38 6.06 7.63 7.81 7.02 6.93 6.40 6.37 4.68 4.88 4.28 6.07 1996 4.95 5.84 6.26 7.26 7.40 5.84 6.32 6.31 6.03 5.45 4.97 5.99 6.05 1997 4.97 3.62 5.19 7.02 7.08 5.62 6.35 6.78 5.35 6.85 7.45 6.00 6.02 1998 4.88 5.16 6.40 7.93 7.12 6.10 7.34 6.95 6.55 4.96 5.83 4.58 6.15 1999 5.12 5.28 5.26 6.39 5.63 6.07 7.18 7.09 6.72 6.47 5.44 4.99 5.97 2000 4.45 3.96 4.48 6.63 6.09 5.19 6.88 6.56 6.67 6.41 5.63 6.05 5.75 2001 4.49 4.94 6.89 7.39 6.47 6.16 7.15 7.54 6.30 6.45 5.87 7.06 6.39 2002 5.13 5.00 6.07 8.22 6.93 5.80 7.88 6.42 6.40 6.26 6.68 5.73 6.38 2003 5.39 5.20 5.61 7.85 7.14 6.19 6.74 7.30 6.27 6.58 5.67 5.73 6.31 MEAN 4.76 4.82 5.83 7.44 6.93 6.35 7.51 7.28 6.08 6.27 6.00 5.39 6.22 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 12 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 6.58 8.15 8.60 12.65 10.68 7.87 11.65 8.71 7.21 8.71 9.43 6.41 8.89 1987 6.25 7.72 8.99 9.92 9.63 6.88 9.25 8.39 8.33 11.07 8.28 8.40 8.59 1988 7.53 7.76 8.98 11.79 8.74 9.74 ***** ***** ***** 10.19 7.77 7.30 ***** 1989 5.46 5.51 9.92 11.90 10.88 10.32 13.31 12.42 10.87 10.43 10.98 8.83 10.07 1990 6.98 7.59 8.75 10.91 10.31 9.79 16.35 22.05 10.08 10.07 9.06 7.37 10.78 1991 8.17 6.91 10.49 12.29 10.68 18.67 15.06 11.81 8.93 11.52 8.03 8.17 10.90 1992 6.12 6.48 7.50 9.73 12.19 10.75 9.38 10.50 9.04 7.67 9.27 8.19 8.90 1993 6.40 6.98 7.53 11.48 12.87 8.95 11.16 10.05 6.87 8.44 10.03 9.52 9.19 1994 8.94 7.48 9.15 11.39 9.10 7.44 10.75 9.39 9.22 11.02 11.73 6.93 9.38 1995 8.19 8.21 9.22 11.55 11.78 10.56 10.38 9.61 9.62 7.14 7.43 6.56 9.19 1996 7.55 8.87 9.49 10.99 11.17 8.79 9.49 9.50 9.11 8.29 7.60 9.15 9.17 1997 7.58 5.54 7.89 10.63 10.70 8.46 9.53 10.20 8.11 10.40 11.33 9.16 9.13 1998 7.45 7.87 9.73 12.00 10.77 9.19 10.99 10.44 9.89 7.55 8.88 7.01 9.31 1999 7.80 8.05 7.98 9.68 8.52 9.14 10.74 10.65 10.14 9.82 8.30 7.64 9.04 2000 6.80 6.05 6.82 10.04 9.20 7.83 10.30 9.85 10.07 9.73 8.59 9.24 8.71 2001 6.87 7.55 10.45 11.18 9.77 9.27 10.70 11.32 9.53 9.79 8.95 10.76 9.68 2002 7.84 7.65 9.21 12.42 10.46 8.73 11.82 9.66 9.68 9.49 10.15 8.73 9.65 2003 8.23 7.91 8.52 11.85 10.77 9.30 10.09 10.95 9.47 9.97 8.63 8.75 9.54 MEAN 7.26 7.35 8.85 11.24 10.46 9.54 11.23 10.91 9.19 9.52 9.14 8.23 9.41 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 13 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 5.75 4.79 7.27 10.99 21.95 37.16 50.66 52.74 42.68 24.01 6.35 5.38 22.48 1987 6.15 7.32 5.05 12.21 28.46 43.51 49.53 48.54 35.83 15.96 10.91 4.79 22.36 1988 3.48 4.80 6.44 10.20 27.38 39.00 ***** ***** ***** 23.15 10.68 6.44 ***** 1989 3.90 6.39 7.58 16.08 28.80 41.55 51.82 45.47 34.08 24.36 8.35 3.78 22.68 1990 3.30 4.33 8.39 11.80 28.83 43.87 48.04 33.23 35.47 21.06 13.13 8.07 21.63 1991 3.71 5.30 6.46 13.89 23.14 37.58 45.45 36.24 29.24 15.29 11.20 3.64 19.26 1992 2.57 3.47 4.59 9.17 14.83 28.96 38.50 38.58 29.80 18.53 7.66 2.61 16.61 1993 3.70 4.37 6.91 8.56 15.62 34.17 44.10 40.10 32.75 19.98 5.57 3.54 18.28 1994 3.76 4.39 6.71 12.97 24.50 36.52 40.79 37.75 33.66 17.85 4.46 2.88 18.85 1995 3.70 4.44 6.22 8.34 21.95 33.24 37.91 39.21 27.83 18.88 9.04 4.41 17.93 1996 4.16 4.72 4.74 9.14 23.43 36.30 49.53 42.06 29.52 18.98 10.42 5.55 19.88 1997 3.99 4.75 4.82 8.96 22.79 37.44 40.08 35.88 28.95 16.80 5.54 2.74 17.73 1998 2.05 3.92 4.80 9.90 22.23 41.74 44.95 45.57 30.40 21.64 12.05 7.73 20.58 1999 4.49 5.18 8.42 12.95 28.18 38.56 42.28 44.72 28.90 20.02 8.40 5.60 20.64 2000 3.76 5.64 8.36 15.58 25.52 38.27 51.71 44.60 27.81 15.10 8.04 3.03 20.62 2001 4.48 4.78 7.58 11.39 22.47 36.55 43.82 43.27 32.14 19.58 8.47 2.97 19.79 2002 2.93 5.26 7.69 7.58 20.80 37.80 42.70 39.50 31.22 21.80 7.85 2.98 19.01 2003 3.58 4.18 6.33 9.98 22.82 37.35 41.31 43.84 29.13 20.58 8.73 3.76 19.30 MEAN 3.86 4.89 6.58 11.09 23.54 37.75 44.89 41.84 31.73 19.64 8.71 4.44 19.91 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 14 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 58 67 58 58 40 21 21 16 17 31 67 59 43 1987 57 58 67 51 31 17 18 18 22 47 49 68 42 1988 72 66 63 58 30 23 *** *** *** 36 48 60 *** 1989 63 52 63 47 32 24 24 25 28 34 62 73 44 1990 70 68 56 54 34 22 28 43 26 38 47 53 45 1991 72 60 66 53 36 35 28 29 28 49 49 72 48 1992 73 69 66 58 52 33 24 25 28 35 61 78 50 1993 68 67 59 64 53 26 24 25 23 36 69 77 49 1994 73 67 64 54 36 22 25 24 26 44 75 74 49 1995 73 70 66 65 44 30 27 25 32 33 52 66 49 1996 67 70 71 60 40 24 19 22 29 36 48 68 46 1997 71 61 66 61 39 23 23 27 27 45 71 80 50 1998 81 71 72 62 41 23 23 23 30 31 49 53 47 1999 68 66 55 51 30 23 24 23 32 40 56 64 44 2000 70 59 52 45 32 21 19 22 31 46 58 78 44 2001 66 66 64 58 38 25 23 25 27 39 60 81 48 2002 76 65 62 68 43 23 25 24 29 36 61 78 49 2003 74 70 63 61 40 25 24 24 30 38 56 73 48 MEAN 70 65 63 57 38 24 23 25 27 39 58 70 46 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 15 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 80 87 80 83 69 44 40 32 30 50 86 83 64 1987 80 83 87 78 58 35 33 33 36 66 74 85 62 1988 90 87 83 83 58 43 *** *** *** 59 75 79 *** 1989 83 71 84 73 58 46 44 46 47 54 82 90 65 1990 88 87 82 83 64 46 45 59 47 60 71 75 67 1991 90 83 89 80 61 52 49 48 47 71 72 89 69 1992 92 87 88 81 77 56 43 43 45 53 82 94 70 1993 90 89 84 86 80 47 41 41 40 53 88 91 69 1994 89 86 84 79 63 41 43 42 44 62 91 91 68 1995 90 90 87 88 70 53 47 43 54 52 78 85 70 1996 84 90 89 85 67 43 35 38 47 55 67 86 66 1997 89 87 88 86 65 41 40 46 44 65 91 94 70 1998 94 89 91 87 68 42 39 38 49 50 71 74 66 1999 86 87 82 78 53 40 41 40 52 61 81 86 66 2000 89 85 79 70 56 37 33 38 48 69 80 93 65 2001 88 88 87 83 65 42 38 42 45 58 78 94 67 2002 92 88 84 91 71 42 42 42 49 52 81 93 69 2003 89 88 85 84 66 43 42 40 49 58 78 89 68 MEAN 88 86 85 82 65 44 41 42 45 58 79 87 67 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SAR POL ZOHAB (40765) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 16 LATITUDE 34 27 N LONGITUDE 45 52 E DATA PROCESSING CENTER ELEVATION 545.0 M AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 38 51 41 41 23 11 12 8 8 17 45 38 28 1987 32 36 46 29 15 8 10 9 11 30 27 50 25 1988 50 46 45 36 16 15 *** *** *** 23 28 42 *** 1989 46 37 46 30 20 15 15 15 18 23 45 56 31 1990 54 51 39 36 19 13 19 36 15 24 30 36 31 1991 54 43 49 35 23 28 20 14 13 26 24 50 32 1992 49 47 43 32 28 16 11 12 13 16 34 54 30 1993 41 38 30 38 27 12 13 11 7 18 42 50 27 1994 51 41 39 27 15 8 12 10 12 26 53 48 29 1995 45 44 38 39 23 14 11 10 14 14 22 41 26 1996 46 46 48 35 18 11 10 10 13 1