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