STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. 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(C) ***** ***** ***** ***** 18.0 17.4 14.5 16.8 18.4 20.1 17.7 15.4 ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** ***** ***** 33.2 36.3 37.4 37.7 31.4 24.2 19.7 11.8 ***** COOLING DEG. DAYS(BASE 21 0C)****** ****** ****** ****** 378.0 458.0 508.0 517.0 312.0 105.0 6.5 0.0 ****** HEATING DEG. DAYS(BASE 18 0C)****** ****** ****** ****** 0.0 0.0 0.0 0.0 0.0 0.0 11.5 193.0 ****** DEWPOINT (MEAN C) ***** ***** ***** ***** 8.0 17.9 15.8 12.6 6.4 1.5 -0.9 -6.7 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** 7.58 15.43 12.70 10.47 7.38 4.63 4.01 3.15 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** 11.31 22.49 18.67 15.44 10.99 7.01 6.09 4.78 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** 42.82 42.16 45.71 50.52 42.97 32.18 21.78 10.96 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** 23 36 32 27 22 21 25 33 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** 36 46 50 46 35 35 41 53 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** 13 27 17 11 10 14 16 20 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** 34 44 48 42 34 35 41 51 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** 16 30 24 19 14 15 19 24 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** 15 30 20 16 13 18 22 31 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** ****** 0.0 0.0 0.4 0.0 0.0 0.0 0.0 0.0 4.2 ****** DAYS WITH PRECIPITATION >=10 **** **** **** 0 0 0 0 0 0 0 0 0 **** DAYS WITH PRECIPITATION >= 5 **** **** **** 0 0 0 0 0 0 0 0 0 **** DAYS WITH PRECIPITATION >= 1 **** **** **** 0 0 0 0 0 0 0 0 2 **** DAYS WITH PRECIPITATION **** **** **** 0 0 1 0 0 0 0 0 7 **** GREATEST DAILY PRECIPITATION ****** ****** ****** 0.0 0.0 0.4 0.0 0.0 0.0 0.0 0.0 2.6 ****** DAY ** ** ** ** ** 9 ** ** ** ** ** 20 DAY WITH THUNDER STORM **** **** **** 0 0 0 0 0 0 0 0 0 **** DAYS WITH SNOW OR SLEET **** **** **** 0 0 0 0 0 0 0 0 0 **** DAYS WITH DUST **** **** **** 1 0 1 4 2 0 0 3 2 **** WIND DIRECTION (PREVAILING) *** *** *** *** 315 315 315 225 315 315 315 315 *** PREVAILING WIND SPEED(KNOTS) **** **** **** **** 8.4 8.7 8.3 5.5 6.8 7.8 6.8 4.7 **** PREVAILING WIND PERCENT ***** ***** ***** ***** 19.8 17.9 13.3 15.7 11.9 11.0 18.7 14.2 ***** CALMS PERCENT OF WIND ***** ***** ***** ***** 64.1 65.0 59.3 62.9 69.4 64.5 66.0 51.0 ***** NO. OF WIND OBSERVATION **** **** **** 107 248 240 248 248 193 155 150 155 1744 VECTOR WIND DIRECTION (MEAN) *** *** *** *** 322 323 291 272 330 318 325 351 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** **** 2.3 2.3 1.8 1.9 1.6 1.7 1.5 1.1 **** WIND STEADINESES (MEAN %) ***** ***** ***** ***** 79.3 82.1 51.4 63.3 72.7 73.9 68.2 50.0 ***** WIND SPEED (MEAN KNOTS) **** **** **** **** 2.9 2.8 3.5 3.0 2.2 2.3 2.2 2.2 **** FASTEST WIND DIRECTION *** *** *** *** 340 350 270 270 10 300 300 30 *** FASTEST WIND SPEED (KNOTS) *** *** *** *** 15 15 45 45 16 15 18 20 *** DAY ** ** ** ** 14 6 13 4 23 16 27 10 DAYS WITH SKY CLEAR (0-2)/8 **** **** **** 12 30 27 22 22 30 31 26 18 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** 2 1 3 7 8 0 0 2 8 **** DAYS WITH CLOUDY (7-8)/8 **** **** **** 0 0 0 2 1 0 0 2 5 **** DAYS WITH VISIBILITY =< 2 KM **** **** **** 0 0 0 1 1 0 0 0 2 **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 273.2 208.5 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. 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ANNUAL AIR TEMPERATURE (C) 16.7 19.4 23.6 25.2 34.9 39.0 39.4 36.5 34.6 31.6 24.2 17.2 28.5 MINIMUN AIR TEMPERATURE (C) 10.3 11.0 13.7 16.9 23.5 27.2 29.3 25.1 22.7 20.4 13.8 7.4 18.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 26 30 31 30 26 15 0 0 160 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 2.0 7.0 7.0 11.0 17.0 23.0 26.0 20.0 19.0 17.0 8.0 1.0 1.0 DAY 5 4 18 8 7 5 28 16 11 30 26 23 MAXIMUM AIR TEMPERATURE (C) 21.8 25.3 29.9 30.5 40.6 44.9 45.4 42.9 41.1 37.7 30.7 24.3 34.6 DAYS WITH MAXIMUM TEMP. >=30 1 0 22 19 31 30 31 31 30 31 16 0 242 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 30.0 29.0 34.0 38.0 46.0 49.0 49.0 45.0 44.0 41.0 36.0 28.0 49.0 DAY 30 1 11 29 20 20 15 5 5 11 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.5 14.3 16.2 13.6 17.1 17.7 16.1 17.8 18.4 17.3 16.9 16.9 16.2 MEAN DAILY TEMP. (MDT) (C) 16.0 18.1 21.8 23.7 32.0 36.0 37.3 34.0 31.9 29.0 22.2 15.8 26.5 COOLING DEG. DAYS(BASE 21 0C) 1.5 0.5 51.0 88.0 342.0 451.5 506.5 403.5 326.5 249.0 54.5 0.0 2474.5 HEATING DEG. DAYS(BASE 18 0C) 72.0 19.0 7.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 71.0 170.5 DEWPOINT (MEAN C) 5.9 1.6 -0.2 5.2 4.0 5.7 9.9 4.3 0.7 5.2 3.3 -1.8 3.7 MIXING RATIO (G/KG) 6.62 4.85 4.31 6.18 5.78 6.55 8.73 5.82 4.64 5.99 5.35 3.72 5.71 VAPOUR PRESSURE (HPA) 10.01 7.33 6.51 9.30 8.67 9.76 12.91 8.67 6.98 9.04 8.09 5.65 8.58 SATURATION DEF. (HPA) 9.73 16.24 24.20 24.30 49.74 62.62 61.00 55.43 50.58 39.45 23.74 15.26 36.02 RELATIVE HUMIDITY (MEAN %) 54 35 24 33 17 16 20 15 14 21 28 31 26 RELATIVE HUMIDITY (MAX. %) 74 59 42 54 31 31 37 28 26 33 41 47 42 RELATIVE HUMIDITY (MIN. %) 39 21 14 20 10 9 11 8 8 14 20 20 16 RELATIVE HUMIDITY (MEAN% 03UTC) 74 59 42 53 31 31 37 28 26 33 40 45 42 RELATIVE HUMIDITY (MEAN% 09UTC) 44 25 18 25 12 11 16 12 11 16 22 23 20 RELATIVE HUMIDITY (MEAN% 15UTC) 49 29 20 26 12 10 12 11 10 19 30 34 22 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 63.0 0.0 4.0 9.0 0.0 2.6 0.0 0.0 0.0 0.0 0.0 10.0 88.6 DAYS WITH PRECIPITATION >=10 3 0 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 4 0 0 1 0 0 0 0 0 0 0 1 6 DAYS WITH PRECIPITATION >= 1 4 0 2 2 0 1 0 0 0 0 0 2 11 DAYS WITH PRECIPITATION 7 2 2 5 1 2 0 0 0 0 1 2 22 GREATEST DAILY PRECIPITATION 24.0 0.0 2.0 7.0 0.0 2.0 0.0 0.0 0.0 0.0 0.0 9.0 24.0 DAY 14 ** 24 22 ** 9 ** ** ** ** ** 22 DAY WITH THUNDER STORM 0 0 0 2 1 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 1 0 3 3 0 1 2 0 0 0 0 10 WIND DIRECTION (PREVAILING) 90 270 315 315 315 315 315 315 315 315 315 90 315 PREVAILING WIND SPEED(KNOTS) 3.0 4.6 5.6 6.2 5.1 6.9 6.9 7.3 6.4 4.3 4.4 3.2 5.9 PREVAILING WIND PERCENT 10.3 14.3 21.9 16.7 19.4 20.7 32.9 25.8 22.0 26.5 18.7 12.3 19.8 CALMS PERCENT OF WIND 58.1 52.1 33.5 38.7 41.3 34.0 31.0 35.5 34.0 25.8 45.3 54.2 40.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 326 318 335 317 336 334 319 328 317 326 321 359 326 VECTOR WIND MAGNITUDE(KNOTS) 0.4 1.7 2.3 2.2 1.9 2.9 3.6 3.2 2.1 1.7 1.0 0.8 2.0 WIND STEADINESES (MEAN %) 23.5 70.8 69.7 64.7 59.4 63.0 81.8 65.3 60.0 60.7 47.6 44.4 62.5 WIND SPEED (MEAN KNOTS) 1.7 2.4 3.3 3.4 3.2 4.6 4.4 4.9 3.5 2.8 2.1 1.8 3.2 FASTEST WIND DIRECTION 210 330 290 350 40 360 210 330 270 30 290 20 330 FASTEST WIND SPEED (KNOTS) 12 14 12 22 18 15 18 25 15 12 10 12 25 DAY 10 10 4 10 22 4 20 30 5 6 7 21 DAYS WITH SKY CLEAR (0-2)/8 13 24 24 13 29 28 24 31 30 30 27 27 300 DAYS WITH P.CLOUDY (3-6)/8 14 2 6 9 2 2 6 0 0 1 3 4 49 DAYS WITH CLOUDY (7-8)/8 4 2 1 8 0 0 1 0 0 0 0 0 16 DAYS WITH VISIBILITY =< 2 KM 1 1 0 2 0 0 0 0 0 0 0 0 4 DURATION OF SUNSHINE HOURS 198.0 243.8 289.9 216.0 333.6 330.8 300.4 ****** ****** 314.7 ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 951.0 948.7 948.2 945.8 942.0 937.3 934.4 936.3 942.9 947.4 951.1 951.6 944.7 MAX. QFE PRESSURE IN HPA 957.1 955.3 955.9 952.7 947.5 944.2 940.0 944.8 948.6 952.8 956.9 958.8 958.8 DAY-HOUR 17- 6 26- 6 11- 6 9- 6 9- 6 8- 6 4- 6 13- 6 30- 6 15- 6 28- 6 23- 6 MIN. QFE PRESSURE IN HPA 945.4 943.4 941.6 937.4 935.2 931.5 929.7 928.0 937.7 940.3 945.4 946.3 928.0 DAY-HOUR 1-12 9-12 21-12 21-12 30-12 19-15 15-15 23-15 1-15 25-15 11-12 15-12 MEAN QNH PRESSURE IN HPA 1020.2 1017.7 1017.2 1014.7 1010.6 1005.6 1002.6 1004.6 1011.6 1016.3 1020.3 1020.8 1013.5 MAX. QNH PRESSURE IN HPA 1026.6 1024.7 1025.3 1021.9 1016.4 1012.9 1008.5 1013.6 1017.6 1022.0 1026.4 1028.4 1028.4 DAY-HOUR 17- 6 26- 6 11- 6 9- 6 9- 6 8- 6 4- 6 13- 6 30- 6 15- 6 28- 6 23- 6 MIN. QNH PRESSURE IN HPA 1014.2 1012.1 1010.2 1005.7 1003.4 999.5 997.6 995.8 1006.0 1008.8 1014.2 1015.2 995.8 DAY-HOUR 1-12 9-12 21-12 21-12 30-12 19-15 15-15 23-15 1-15 25-15 11-12 15-12 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 951.6 949.4 949.2 946.6 943.4 938.8 935.9 937.2 944.3 948.9 952.5 952.6 945.9 MAX. QFE PRESSURE IN HPA 956.1 953.9 954.7 950.5 946.7 943.0 939.6 943.2 948.3 952.2 956.7 956.6 956.7 DAY 17 26 11 9 9 8 4 13 30 28 28 23 MIN. QFE PRESSURE IN HPA 948.0 945.4 943.2 941.2 937.3 934.7 933.2 930.4 941.4 944.5 948.3 948.3 930.4 DAY 6 8 21 22 30 24 16 23 2 25 11 15 MEAN QNH PRESSURE IN HPA 1020.8 1018.5 1018.2 1015.4 1012.1 1007.2 1004.2 1005.5 1013.1 1017.9 1021.7 1021.9 1014.7 MAX. QNH PRESSURE IN HPA 1025.5 1023.2 1024.1 1019.6 1015.6 1011.7 1008.1 1011.9 1017.3 1021.4 1026.2 1026.1 1026.2 DAY 17 26 11 9 9 8 4 13 30 28 28 23 MIN. QNH PRESSURE IN HPA 1017.0 1014.2 1011.9 1009.8 1005.6 1002.9 1001.3 998.3 1010.0 1013.2 1017.3 1017.3 998.3 DAY 6 8 21 22 30 24 16 23 2 25 11 15 MEAN QFF PRESSURE IN HPA 1020.1 1017.3 1016.2 1012.8 1007.4 1001.5 998.1 1000.5 1008.6 1014.1 1019.8 1021.7 1011.5 MAX. QFF PRESSURE IN HPA 1024.6 1021.9 1021.7 1017.8 1011.4 1006.4 1002.0 1006.9 1012.9 1018.6 1025.3 1027.5 1027.5 DAY 17 26 11 9 9 8 4 13 30 28 28 23 MIN. QFF PRESSURE IN HPA 1016.2 1012.9 1009.2 1006.6 1000.2 996.9 995.0 993.3 1005.5 1009.8 1014.8 1017.0 993.3 DAY 11 8 21 21 30 24 16 23 2 2 11 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 953.2 950.9 950.4 947.8 944.1 939.3 936.4 938.4 945.0 949.5 953.4 953.9 946.9 MAX. QFE PRESSURE IN HPA 957.1 955.3 955.9 952.7 947.5 944.2 940.0 944.8 948.6 952.8 956.9 958.8 958.8 DAY 17 26 11 9 9 8 4 13 30 15 28 23 MIN. QFE PRESSURE IN HPA 949.3 946.6 944.8 941.9 937.6 935.1 933.7 932.6 942.4 945.2 949.1 949.7 932.6 DAY 6 8 21 22 30 24 27 23 2 25 11 15 MEAN QNH PRESSURE IN HPA 1022.4 1020.0 1019.5 1016.8 1012.8 1007.8 1004.7 1006.8 1013.8 1018.6 1022.7 1023.2 1015.8 MAX. QNH PRESSURE IN HPA 1026.6 1024.7 1025.3 1021.9 1016.4 1012.9 1008.5 1013.6 1017.6 1022.0 1026.4 1028.4 1028.4 DAY 17 26 11 9 9 8 4 13 30 15 28 23 MIN. QNH PRESSURE IN HPA 1018.3 1015.5 1013.6 1010.5 1005.9 1003.3 1001.8 1000.6 1011.0 1014.0 1018.1 1018.8 1000.6 DAY 6 8 21 22 30 24 27 23 2 25 11 15 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 951.4 949.1 948.7 946.4 942.5 937.7 934.9 936.9 943.4 947.4 951.0 951.6 945.1 MAX. QFE PRESSURE IN HPA 956.6 953.4 954.5 950.9 945.5 942.0 938.7 943.5 946.8 950.3 955.0 956.2 956.6 DAY 14 26 11 9 8 8 4 13 29 15 28 23 MIN. QFE PRESSURE IN HPA 947.0 945.3 943.4 940.2 936.9 934.3 932.4 930.3 940.8 942.8 946.6 947.2 930.3 DAY 6 8 21 22 30 24 26 23 18 25 11 15 MEAN QNH PRESSURE IN HPA 1020.6 1018.1 1017.7 1015.2 1011.1 1006.1 1003.1 1005.2 1012.0 1016.4 1020.2 1020.8 1013.9 MAX. QNH PRESSURE IN HPA 1026.1 1022.7 1023.8 1020.0 1014.3 1010.6 1007.1 1012.2 1015.7 1019.4 1024.4 1025.6 1026.1 DAY 14 26 11 9 8 8 4 13 29 15 28 23 MIN. QNH PRESSURE IN HPA 1015.9 1014.1 1012.1 1008.7 1005.2 1002.4 1000.4 998.2 1009.3 1011.4 1015.5 1016.1 998.2 DAY 6 8 21 22 30 24 26 23 18 25 11 15 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 949.5 947.1 946.5 944.3 940.1 935.4 932.7 935.0 941.2 945.6 949.4 950.0 943.1 MAX. QFE PRESSURE IN HPA 954.6 951.1 951.7 949.5 943.4 940.0 936.9 941.9 945.1 948.6 953.4 953.5 954.6 DAY 16 26 11 4 8 3 4 13 29 15 28 23 MIN. QFE PRESSURE IN HPA 945.4 943.4 941.6 937.4 935.2 932.2 930.3 928.6 938.4 940.6 945.4 946.3 928.6 DAY 1 9 21 21 30 19 15 23 1 25 11 15 MEAN QNH PRESSURE IN HPA 1018.6 1016.0 1015.3 1013.0 1008.6 1003.7 1000.8 1003.2 1009.7 1014.4 1018.4 1019.1 1011.7 MAX. QNH PRESSURE IN HPA 1023.9 1020.2 1020.9 1018.5 1012.1 1008.5 1005.2 1010.5 1013.9 1017.6 1022.7 1022.8 1023.9 DAY 16 26 11 4 8 3 4 13 29 15 28 23 MIN. QNH PRESSURE IN HPA 1014.2 1012.1 1010.2 1005.7 1003.4 1000.2 998.2 996.4 1006.8 1009.1 1014.2 1015.2 996.4 DAY 1 9 21 21 30 19 15 23 1 25 11 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 949.6 947.2 946.6 944.2 939.8 935.1 932.1 934.2 940.8 945.6 949.4 950.0 942.9 MAX. QFE PRESSURE IN HPA 954.6 951.1 951.7 949.1 943.1 939.6 936.0 941.3 945.4 948.6 953.4 953.5 954.6 DAY 16 24 11 10 8 3 4 13 29 15 28 23 MIN. QFE PRESSURE IN HPA 945.4 943.4 942.4 937.4 935.4 931.5 929.7 928.0 937.7 940.3 945.4 946.3 928.0 DAY 1 9 21 21 29 19 15 23 1 25 11 15 MEAN QNH PRESSURE IN HPA 1018.6 1016.1 1015.4 1012.9 1008.3 1003.3 1000.1 1002.4 1009.3 1014.5 1018.4 1019.1 1011.5 MAX. QNH PRESSURE IN HPA 1023.9 1020.2 1020.9 1018.1 1011.8 1008.1 1004.2 1009.9 1014.2 1017.6 1022.7 1022.8 1023.9 DAY 16 24 11 10 8 3 4 13 29 15 28 23 MIN. QNH PRESSURE IN HPA 1014.2 1012.1 1011.0 1005.7 1003.6 999.5 997.6 995.8 1006.0 1008.8 1014.2 1015.2 995.8 DAY 1 9 21 21 29 19 15 23 1 25 11 15 MEAN QFF PRESSURE IN HPA 1017.9 1014.9 1013.4 1010.2 1003.6 997.6 994.2 997.5 1004.9 1010.7 1016.5 1018.9 1008.4 MAX. QFF PRESSURE IN HPA 1022.8 1019.1 1018.4 1016.6 1008.3 1002.6 998.3 1004.8 1009.7 1014.5 1021.8 1024.2 1024.2 DAY 16 26 11 10 5 3 4 13 29 28 28 23 MIN. QFF PRESSURE IN HPA 1014.4 1010.2 1008.4 1002.5 998.4 993.5 991.4 990.4 1001.7 1005.2 1011.5 1014.8 990.4 DAY 1 9 23 21 29 19 15 24 6 25 11 21 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 18.6 18.9 23.1 27.9 35.6 39.5 39.1 38.1 35.0 31.2 20.6 17.8 28.8 MINIMUN AIR TEMPERATURE (C) 9.3 11.8 13.5 17.5 23.3 28.2 28.9 26.6 23.3 20.0 8.0 6.6 18.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 28 30 31 31 25 11 0 0 156 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 5.0 8.0 7.0 12.0 16.0 25.0 24.0 23.0 17.0 16.0 2.0 2.0 2.0 DAY 2 12 26 7 13 2 5 17 6 20 25 25 MAXIMUM AIR TEMPERATURE (C) 25.8 23.8 28.8 33.5 41.2 45.6 44.9 43.8 40.4 36.7 27.6 24.5 34.7 DAYS WITH MAXIMUM TEMP. >=30 0 1 15 29 31 30 31 31 30 31 11 1 241 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 29.0 32.0 35.0 38.0 45.0 49.0 48.0 47.0 42.0 42.0 33.0 30.0 49.0 DAY 30 2 20 23 21 29 20 1 1 1 1 11 DIF. BETWEEN (MAX.-MIN.) (C) 16.5 12.0 15.3 16.0 17.9 17.4 16.0 17.2 17.1 16.7 19.6 17.9 16.6 MEAN DAILY TEMP. (MDT) (C) 17.5 17.8 21.2 25.5 32.3 36.9 36.9 35.2 31.9 28.3 17.8 15.5 26.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 2.5 37.0 134.5 349.0 477.5 492.5 440.5 326.5 227.0 6.5 0.0 2493.5 HEATING DEG. DAYS(BASE 18 0C) 26.0 31.5 7.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 43.5 77.5 186.0 DEWPOINT (MEAN C) -0.4 7.6 1.7 5.1 4.7 8.8 9.8 7.5 7.3 5.3 -10.6 -3.6 3.6 MIXING RATIO (G/KG) 4.08 7.17 4.70 6.06 5.94 8.08 9.15 7.50 7.54 6.11 2.01 3.43 5.98 VAPOUR PRESSURE (HPA) 6.21 10.82 7.10 9.12 8.90 11.99 13.51 11.13 11.26 9.22 3.07 5.22 8.96 SATURATION DEF. (HPA) 16.40 11.82 22.65 29.94 51.83 62.53 58.73 57.54 46.92 37.87 23.01 16.47 36.31 RELATIVE HUMIDITY (MEAN %) 31 53 27 26 16 18 21 18 21 22 13 27 24 RELATIVE HUMIDITY (MAX. %) 48 77 47 44 29 32 36 34 37 38 27 45 41 RELATIVE HUMIDITY (MIN. %) 19 36 16 16 11 11 12 10 13 14 7 17 15 RELATIVE HUMIDITY (MEAN% 03UTC) 47 75 47 44 29 32 35 34 37 38 27 45 41 RELATIVE HUMIDITY (MEAN% 09UTC) 23 43 18 18 12 13 16 13 16 16 8 20 18 RELATIVE HUMIDITY (MEAN% 15UTC) 32 52 27 23 13 14 14 11 16 19 12 26 22 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.4 80.6 0.0 1.0 0.5 3.0 10.0 0.0 0.0 0.0 0.0 0.0 95.5 DAYS WITH PRECIPITATION >=10 0 4 0 0 0 0 1 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 0 4 0 0 0 0 1 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 1 0 8 0 1 0 1 1 0 0 0 0 0 11 DAYS WITH PRECIPITATION 2 10 0 3 1 1 2 0 0 0 0 0 19 GREATEST DAILY PRECIPITATION 0.4 31.0 0.0 1.0 0.5 3.0 10.0 0.0 0.0 0.0 0.0 0.0 31.0 DAY 15 22 ** 20 24 2 8 ** ** ** ** ** DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 5 1 0 1 1 0 3 0 2 0 13 WIND DIRECTION (PREVAILING) 90 315 315 315 315 315 360 360 315 315 360 315 315 PREVAILING WIND SPEED(KNOTS) 3.1 5.0 6.4 6.7 5.5 6.3 7.3 7.2 6.8 7.1 8.3 6.3 6.1 PREVAILING WIND PERCENT 16.8 17.1 17.4 26.7 25.8 22.7 20.6 18.1 18.7 9.7 6.0 2.6 15.8 CALMS PERCENT OF WIND 47.7 49.3 34.2 27.3 29.0 29.3 27.7 30.3 50.7 85.8 84.0 95.5 49.3 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 331 314 319 332 335 319 336 351 316 315 324 321 329 VECTOR WIND MAGNITUDE(KNOTS) 0.5 1.4 1.5 3.1 2.2 2.5 2.4 2.6 2.0 0.9 1.2 0.2 1.7 WIND STEADINESES (MEAN %) 27.8 60.9 41.7 67.4 61.1 64.1 54.5 61.9 64.5 90.0 92.3 66.7 60.7 WIND SPEED (MEAN KNOTS) 1.8 2.3 3.6 4.6 3.6 3.9 4.4 4.2 3.1 1.0 1.3 0.3 2.8 FASTEST WIND DIRECTION 280 300 230 330 350 150 20 50 330 250 340 330 230 FASTEST WIND SPEED (KNOTS) 10 15 28 20 15 20 15 15 25 10 15 10 28 DAY 23 15 20 10 10 1 16 9 25 3 2 28 DAYS WITH SKY CLEAR (0-2)/8 26 15 25 22 29 24 25 30 29 27 30 26 308 DAYS WITH P.CLOUDY (3-6)/8 2 5 6 8 2 6 5 1 1 4 0 4 44 DAYS WITH CLOUDY (7-8)/8 3 8 0 0 0 0 1 0 0 0 0 1 13 DAYS WITH VISIBILITY =< 2 KM 0 1 3 1 0 0 0 0 1 0 0 0 6 DURATION OF SUNSHINE HOURS ****** ****** 300.6 293.7 328.3 300.1 298.0 321.1 297.3 295.6 299.8 275.2 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 952.4 949.5 946.6 944.8 942.5 936.1 934.0 935.8 942.0 947.6 952.8 951.3 944.6 MAX. QFE PRESSURE IN HPA 956.5 956.5 953.4 952.0 950.9 945.1 940.9 942.8 949.2 954.5 958.8 958.5 958.8 DAY-HOUR 2- 6 26- 6 3- 6 1- 6 16- 6 2- 6 10- 6 17- 6 21- 6 31- 6 26- 6 8- 6 MIN. QFE PRESSURE IN HPA 947.5 943.2 934.9 935.8 933.9 929.8 928.5 928.5 935.1 938.6 947.7 945.9 928.5 DAY-HOUR 11-12 15-12 20-12 23-15 30-15 28-12 25-12 5-12 1-12 1-12 11-12 11-12 MEAN QNH PRESSURE IN HPA 1021.6 1018.6 1015.5 1013.5 1011.2 1004.3 1002.1 1004.1 1010.6 1016.6 1022.0 1020.4 1013.4 MAX. QNH PRESSURE IN HPA 1026.0 1026.0 1022.7 1021.2 1020.0 1013.9 1009.4 1011.4 1018.2 1023.8 1028.4 1028.1 1028.4 DAY-HOUR 2- 6 26- 6 3- 6 1- 6 16- 6 2- 6 10- 6 17- 6 21- 6 31- 6 26- 6 8- 6 MIN. QNH PRESSURE IN HPA 1016.4 1011.9 1003.1 1004.0 1002.0 997.7 996.3 996.3 1003.3 1007.0 1016.6 1014.7 996.3 DAY-HOUR 11-12 15-12 20-12 23-15 30-15 28-12 25-12 5-12 1-12 1-12 11-12 11-12 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 953.8 950.6 948.1 946.2 944.1 937.8 935.7 937.6 943.6 949.3 954.5 952.9 946.2 MAX. QFE PRESSURE IN HPA 956.0 954.2 952.6 950.6 950.6 945.0 940.3 942.0 948.4 953.6 958.0 958.2 958.2 DAY 3 1 3 6 16 3 8 17 21 31 28 8 MIN. QFE PRESSURE IN HPA 950.4 945.6 940.1 938.6 938.5 933.5 932.2 932.2 939.0 942.3 951.7 949.0 932.2 DAY 10 15 20 24 30 29 27 2 1 2 16 11 MEAN QNH PRESSURE IN HPA 1023.0 1019.7 1017.1 1015.0 1012.8 1006.1 1003.9 1006.0 1012.3 1018.3 1023.8 1022.2 1015.0 MAX. QNH PRESSURE IN HPA 1025.4 1023.5 1021.8 1019.7 1019.7 1013.8 1008.8 1010.6 1017.4 1022.9 1027.5 1027.8 1027.8 DAY 3 1 3 6 16 3 8 17 21 31 28 8 MIN. QNH PRESSURE IN HPA 1019.5 1014.4 1008.6 1007.0 1006.9 1001.6 1000.2 1000.2 1007.4 1010.9 1020.9 1018.0 1000.2 DAY 10 15 20 24 30 29 27 2 1 2 16 11 MEAN QFF PRESSURE IN HPA 1022.7 1018.5 1015.3 1012.0 1008.1 1000.3 997.9 1000.4 1007.6 1014.5 1023.0 1022.1 1011.8 MAX. QFF PRESSURE IN HPA 1025.9 1023.0 1020.5 1017.7 1015.6 1009.2 1003.4 1005.7 1012.8 1020.1 1028.4 1027.7 1028.4 DAY 3 26 5 6 16 3 10 18 21 31 28 8 MIN. QFF PRESSURE IN HPA 1019.3 1013.3 1005.6 1003.1 1001.0 995.2 994.3 994.1 1001.7 1006.3 1020.1 1017.5 994.1 DAY 10 21 20 24 30 29 27 2 1 2 4 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 954.6 951.6 948.9 947.0 944.6 938.3 936.1 938.0 944.3 949.8 955.1 953.4 946.8 MAX. QFE PRESSURE IN HPA 956.5 956.5 953.4 952.0 950.9 945.1 940.9 942.8 949.2 954.5 958.8 958.5 958.8 DAY 2 26 3 1 16 2 10 17 21 31 26 8 MIN. QFE PRESSURE IN HPA 951.1 947.1 939.2 939.3 938.8 934.2 932.4 932.4 939.4 942.9 952.2 949.0 932.4 DAY 10 15 20 24 30 28 27 2 1 2 16 11 MEAN QNH PRESSURE IN HPA 1024.0 1020.7 1017.9 1015.8 1013.4 1006.7 1004.4 1006.4 1013.0 1018.9 1024.5 1022.7 1015.7 MAX. QNH PRESSURE IN HPA 1026.0 1026.0 1022.7 1021.2 1020.0 1013.9 1009.4 1011.4 1018.2 1023.8 1028.4 1028.1 1028.4 DAY 2 26 3 1 16 2 10 17 21 31 26 8 MIN. QNH PRESSURE IN HPA 1020.2 1016.0 1007.6 1007.7 1007.2 1002.3 1000.4 1000.4 1007.8 1011.6 1021.4 1018.0 1000.4 DAY 10 15 20 24 30 28 27 2 1 2 16 11 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 952.3 949.6 946.6 945.0 942.6 936.2 934.1 935.9 941.9 947.4 952.4 950.8 944.6 MAX. QFE PRESSURE IN HPA 954.9 954.5 951.5 949.6 948.1 943.0 938.8 940.8 946.8 952.1 955.8 955.6 955.8 DAY 15 26 10 1 3 2 8 17 26 31 26 7 MIN. QFE PRESSURE IN HPA 949.4 945.2 936.4 937.7 936.5 931.7 931.2 931.2 937.7 940.5 949.8 946.8 931.2 DAY 9 20 20 24 30 28 27 2 1 2 12 27 MEAN QNH PRESSURE IN HPA 1021.5 1018.6 1015.4 1013.8 1011.3 1004.5 1002.3 1004.1 1010.5 1016.3 1021.6 1020.0 1013.3 MAX. QNH PRESSURE IN HPA 1024.3 1023.8 1020.7 1018.6 1017.1 1011.7 1007.2 1009.3 1015.7 1021.3 1025.2 1025.0 1025.2 DAY 15 26 10 1 3 2 8 17 26 31 26 7 MIN. QNH PRESSURE IN HPA 1018.4 1014.0 1004.7 1006.0 1004.8 999.7 999.2 999.2 1006.0 1009.0 1018.9 1015.7 999.2 DAY 9 20 20 24 30 28 27 2 1 2 12 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 950.7 947.9 944.9 943.0 940.7 934.0 932.0 933.9 940.1 945.8 950.8 949.6 942.8 MAX. QFE PRESSURE IN HPA 953.0 952.7 950.3 948.8 946.5 941.1 937.7 939.2 944.7 951.0 954.3 954.3 954.3 DAY 15 26 3 1 3 2 8 17 20 31 26 7 MIN. QFE PRESSURE IN HPA 947.5 943.2 934.9 936.3 934.7 929.8 928.5 928.5 935.1 938.6 947.7 945.9 928.5 DAY 11 15 20 24 30 28 25 5 1 1 11 11 MEAN QNH PRESSURE IN HPA 1019.8 1016.9 1013.6 1011.7 1009.2 1002.1 1000.0 1002.0 1008.6 1014.7 1019.9 1018.6 1011.4 MAX. QNH PRESSURE IN HPA 1022.2 1021.9 1019.4 1017.8 1015.4 1009.6 1006.0 1007.6 1013.5 1020.1 1023.6 1023.6 1023.6 DAY 15 26 3 1 3 2 8 17 20 31 26 7 MIN. QNH PRESSURE IN HPA 1016.4 1011.9 1003.1 1004.6 1002.9 997.7 996.3 996.3 1003.3 1007.0 1016.6 1014.7 996.3 DAY 11 15 20 24 30 28 25 5 1 1 11 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 950.7 948.2 944.9 942.8 940.7 934.0 932.1 933.9 940.2 946.0 951.1 949.8 942.9 MAX. QFE PRESSURE IN HPA 953.0 951.8 950.3 948.8 946.7 943.4 939.7 939.2 944.8 951.4 954.5 954.7 954.7 DAY 15 17 3 1 3 2 8 17 25 31 26 7 MIN. QFE PRESSURE IN HPA 947.5 943.9 935.9 935.8 933.9 929.8 928.5 928.5 935.1 938.6 948.1 946.1 928.5 DAY 11 14 20 23 30 28 25 5 1 1 11 27 MEAN QNH PRESSURE IN HPA 1019.8 1017.1 1013.7 1011.5 1009.2 1002.2 1000.1 1002.0 1008.7 1014.8 1020.3 1018.9 1011.5 MAX. QNH PRESSURE IN HPA 1022.2 1021.0 1019.4 1017.8 1015.6 1012.1 1008.2 1007.6 1013.6 1020.6 1023.8 1024.1 1024.1 DAY 15 17 3 1 3 2 8 17 25 31 26 7 MIN. QNH PRESSURE IN HPA 1016.4 1012.6 1004.1 1004.0 1002.0 997.7 996.3 996.3 1003.3 1007.0 1017.1 1014.9 996.3 DAY 11 14 20 23 30 28 25 5 1 1 11 27 MEAN QFF PRESSURE IN HPA 1019.4 1015.9 1011.8 1008.4 1004.4 996.3 994.3 996.5 1004.0 1011.1 1019.5 1018.7 1008.4 MAX. QFF PRESSURE IN HPA 1022.2 1020.3 1018.7 1015.4 1011.4 1007.5 1003.2 1002.6 1009.1 1017.5 1024.8 1023.6 1024.8 DAY 2 26 3 1 3 2 8 17 25 31 26 7 MIN. QFF PRESSURE IN HPA 1015.7 1011.6 1001.0 1000.0 996.2 991.3 990.2 990.2 997.9 1002.4 1016.0 1014.3 990.2 DAY 11 20 20 23 30 28 25 5 1 1 11 11 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 15.8 20.1 23.8 28.7 35.5 38.9 39.5 38.3 36.3 29.8 24.7 15.7 28.9 MINIMUN AIR TEMPERATURE (C) 5.5 11.4 14.7 18.4 23.8 27.7 30.8 27.8 25.3 18.5 14.4 7.1 18.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 12 27 30 31 31 30 12 0 0 173 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 3 0 0 0 0 0 0 0 0 0 0 2 5 TEMPERATURE RECORDS LOWEST(C) 0.0 6.0 7.0 10.0 19.0 22.0 27.0 22.0 22.0 10.0 9.0 -1.0 -1.0 DAY 7 8 1 1 1 9 21 26 3 25 30 27 MAXIMUM AIR TEMPERATURE (C) 22.4 25.8 29.5 34.7 41.5 45.1 46.3 44.3 42.2 36.2 30.5 21.6 35.0 DAYS WITH MAXIMUM TEMP. >=30 0 2 16 27 31 30 31 31 30 29 19 0 246 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.0 31.0 36.0 41.0 47.0 49.0 49.0 47.0 44.0 41.0 34.0 28.0 49.0 DAY 17 25 8 22 17 24 2 4 7 2 9 18 DIF. BETWEEN (MAX.-MIN.) (C) 16.9 14.4 14.8 16.3 17.7 17.4 15.5 16.5 16.9 17.7 16.1 14.5 16.2 MEAN DAILY TEMP. (MDT) (C) 14.0 18.6 22.1 26.5 32.7 36.4 38.6 36.1 33.7 27.4 22.4 14.4 26.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 6.0 51.0 173.0 361.5 461.5 544.5 467.0 382.5 199.5 54.0 0.0 2700.5 HEATING DEG. DAYS(BASE 18 0C) 125.5 23.0 3.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.5 113.0 266.0 DEWPOINT (MEAN C) -3.2 4.2 2.3 3.1 10.1 16.2 17.0 12.7 13.9 7.8 6.3 1.1 7.6 MIXING RATIO (G/KG) 3.41 5.90 5.00 5.33 8.85 13.41 13.74 10.83 10.99 7.26 6.49 4.72 8.00 VAPOUR PRESSURE (HPA) 5.20 8.90 7.54 8.03 13.19 19.72 20.13 15.95 16.31 10.93 9.81 7.16 11.91 SATURATION DEF. (HPA) 13.86 15.64 23.27 33.58 47.31 52.59 54.36 53.72 46.11 33.92 22.69 11.72 34.06 RELATIVE HUMIDITY (MEAN %) 31 39 28 22 23 30 31 25 29 27 33 40 30 RELATIVE HUMIDITY (MAX. %) 55 61 49 37 35 43 48 43 45 40 48 57 47 RELATIVE HUMIDITY (MIN. %) 18 25 16 14 17 23 20 15 19 19 22 29 20 RELATIVE HUMIDITY (MEAN% 03UTC) 55 60 48 37 35 42 47 43 45 40 48 56 46 RELATIVE HUMIDITY (MEAN% 09UTC) 21 29 20 18 20 26 25 20 23 22 28 35 24 RELATIVE HUMIDITY (MEAN% 15UTC) 33 42 25 16 20 26 26 17 24 26 31 33 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 7.0 28.6 1.0 0.0 0.0 0.0 29.0 0.0 0.0 0.0 0.0 12.5 78.1 DAYS WITH PRECIPITATION >=10 0 2 0 0 0 0 1 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 1 2 0 0 0 0 4 0 0 0 0 2 9 DAYS WITH PRECIPITATION >= 1 1 3 1 0 0 0 4 0 0 0 0 2 11 DAYS WITH PRECIPITATION 1 4 1 0 0 0 4 0 0 0 0 6 16 GREATEST DAILY PRECIPITATION 7.0 16.0 1.0 0.0 0.0 0.0 10.0 0.0 0.0 0.0 0.0 7.0 16.0 DAY 5 18 30 ** ** ** 28 ** ** ** ** 9 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 3 7 9 7 4 7 4 3 2 0 0 47 WIND DIRECTION (PREVAILING) 315 270 315 315 315 315 315 315 315 360 315 360 315 PREVAILING WIND SPEED(KNOTS) 5.6 11.1 8.2 11.0 8.9 5.8 6.8 6.0 7.4 8.0 5.7 6.7 7.4 PREVAILING WIND PERCENT 3.2 5.0 14.8 22.7 9.0 15.3 27.1 20.0 18.0 7.7 9.3 6.5 12.9 CALMS PERCENT OF WIND 95.5 86.4 76.8 71.3 76.1 68.7 57.4 63.9 68.0 83.9 83.3 82.6 76.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 330 297 304 316 326 337 312 329 331 346 323 323 321 VECTOR WIND MAGNITUDE(KNOTS) 0.3 1.0 1.8 2.9 1.3 1.4 2.3 1.7 1.8 0.9 0.7 0.9 1.4 WIND STEADINESES (MEAN %) 100.0 83.3 85.7 96.7 65.0 63.6 76.7 68.0 75.0 75.0 77.8 81.8 77.8 WIND SPEED (MEAN KNOTS) 0.3 1.2 2.1 3.0 2.0 2.2 3.0 2.5 2.4 1.2 0.9 1.1 1.8 FASTEST WIND DIRECTION 340 280 280 320 350 40 70 310 330 340 340 360 320 FASTEST WIND SPEED (KNOTS) 15 20 25 28 18 20 18 15 15 15 10 16 28 DAY 22 6 13 26 4 14 14 1 8 2 20 26 DAYS WITH SKY CLEAR (0-2)/8 17 14 17 15 29 30 26 28 30 31 22 23 282 DAYS WITH P.CLOUDY (3-6)/8 14 11 11 11 2 0 4 2 0 0 7 7 69 DAYS WITH CLOUDY (7-8)/8 0 3 3 4 0 0 1 1 0 0 1 1 14 DAYS WITH VISIBILITY =< 2 KM 0 0 3 4 0 1 0 0 0 0 0 0 8 DURATION OF SUNSHINE HOURS 264.7 210.7 217.2 236.0 318.7 298.4 256.2 301.7 283.8 307.9 262.3 239.7 3197.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 953.8 949.5 945.5 945.5 942.5 936.7 932.7 934.6 940.3 948.8 950.0 951.5 944.3 MAX. QFE PRESSURE IN HPA 960.4 955.4 956.0 951.9 950.6 943.4 939.9 941.2 946.5 956.5 955.0 959.9 960.4 DAY-HOUR 7- 6 21- 6 3- 6 5- 6 3- 6 8- 6 22- 3 29- 6 29- 6 28- 6 12- 6 16- 6 MIN. QFE PRESSURE IN HPA 948.4 943.1 932.6 936.2 935.3 928.6 925.9 928.0 934.6 940.5 945.6 943.0 925.9 DAY-HOUR 21-12 13-12 24-15 27-15 19-15 30-15 10-15 4-15 11-12 1-12 27-12 24-12 MEAN QNH PRESSURE IN HPA 1023.1 1018.5 1014.3 1014.3 1011.1 1005.0 1000.7 1002.8 1008.8 1017.8 1019.1 1020.6 1013.0 MAX. QNH PRESSURE IN HPA 1030.1 1024.8 1025.4 1021.1 1019.7 1012.1 1008.4 1009.8 1015.4 1026.0 1024.4 1029.6 1030.1 DAY-HOUR 7- 6 21- 6 3- 6 5- 6 3- 6 8- 6 22- 3 29- 6 29- 6 28- 6 12- 6 16- 6 MIN. QNH PRESSURE IN HPA 1017.4 1011.8 1000.6 1004.5 1003.5 996.4 993.6 995.8 1002.8 1009.0 1014.4 1011.7 993.6 DAY-HOUR 21-12 13-12 24-15 27-15 19-15 30-15 10-15 4-15 11-12 1-12 27-12 24-12 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 955.2 950.9 946.5 946.4 943.7 938.3 934.5 936.3 942.0 949.8 950.9 952.2 945.6 MAX. QFE PRESSURE IN HPA 959.2 955.3 954.8 951.1 949.3 943.0 939.9 940.9 945.1 955.0 953.8 958.2 959.2 DAY 7 21 3 17 3 8 22 31 29 26 12 16 MIN. QFE PRESSURE IN HPA 951.8 945.3 934.7 940.6 939.2 934.3 930.5 932.8 938.9 944.2 948.7 944.2 930.5 DAY 21 13 24 26 17 30 10 5 7 1 27 25 MEAN QNH PRESSURE IN HPA 1024.5 1020.1 1015.3 1015.3 1012.4 1006.7 1002.7 1004.6 1010.6 1018.9 1020.1 1021.4 1014.4 MAX. QNH PRESSURE IN HPA 1028.8 1024.7 1024.2 1020.2 1018.3 1011.7 1008.4 1009.4 1013.9 1024.4 1023.1 1027.8 1028.8 DAY 7 21 3 17 3 8 22 31 29 26 12 16 MIN. QNH PRESSURE IN HPA 1021.0 1014.1 1002.9 1009.1 1007.6 1002.4 998.4 1000.9 1007.3 1012.9 1017.7 1012.9 998.4 DAY 21 13 24 26 17 30 10 5 7 1 27 25 MEAN QFF PRESSURE IN HPA 1024.9 1018.9 1013.2 1012.1 1007.6 1000.9 996.5 998.8 1005.4 1015.6 1017.8 1021.5 1011.1 MAX. QFF PRESSURE IN HPA 1030.4 1024.9 1023.8 1017.4 1014.3 1006.3 1002.8 1004.0 1009.2 1023.1 1020.7 1027.9 1030.4 DAY 7 21 1 5 2 8 22 31 29 26 12 16 MIN. QFF PRESSURE IN HPA 1020.3 1012.5 999.9 1005.3 1001.8 996.6 992.0 994.1 1001.7 1008.5 1015.6 1012.7 992.0 DAY 22 13 24 26 17 30 10 5 7 1 27 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 956.1 951.6 947.7 947.5 944.6 938.7 934.8 936.7 942.5 951.1 952.2 953.8 946.4 MAX. QFE PRESSURE IN HPA 960.4 955.4 956.0 951.9 950.6 943.4 938.8 941.2 946.5 956.5 955.0 959.9 960.4 DAY 7 21 3 5 3 8 22 29 29 28 12 16 MIN. QFE PRESSURE IN HPA 952.4 945.7 936.2 940.9 939.8 934.5 930.4 932.9 939.4 945.5 950.0 945.2 930.4 DAY 26 13 24 26 17 30 10 5 7 1 27 25 MEAN QNH PRESSURE IN HPA 1025.5 1020.8 1016.7 1016.5 1013.3 1007.2 1003.0 1005.0 1011.1 1020.2 1021.4 1023.0 1015.3 MAX. QNH PRESSURE IN HPA 1030.1 1024.8 1025.4 1021.1 1019.7 1012.1 1007.2 1009.8 1015.4 1026.0 1024.4 1029.6 1030.1 DAY 7 21 3 5 3 8 22 29 29 28 12 16 MIN. QNH PRESSURE IN HPA 1021.6 1014.5 1004.5 1009.4 1008.3 1002.7 998.3 1001.0 1007.8 1014.3 1019.1 1014.0 998.3 DAY 26 13 24 26 17 30 10 5 7 1 27 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 953.3 949.3 946.1 946.5 943.4 937.5 933.3 935.0 940.7 949.5 950.5 951.7 944.7 MAX. QFE PRESSURE IN HPA 957.8 952.4 954.4 951.5 948.2 942.0 938.2 939.2 945.1 955.0 953.7 957.3 957.8 DAY 6 28 3 4 1 16 22 31 29 28 12 16 MIN. QFE PRESSURE IN HPA 949.4 943.3 935.6 939.8 938.9 933.1 929.2 931.3 936.7 943.4 948.1 943.2 929.2 DAY 21 13 24 26 17 30 10 5 11 3 27 25 MEAN QNH PRESSURE IN HPA 1022.6 1018.3 1015.0 1015.4 1012.1 1005.8 1001.4 1003.2 1009.3 1018.5 1019.6 1020.9 1013.5 MAX. QNH PRESSURE IN HPA 1027.3 1021.6 1023.7 1020.7 1017.2 1010.6 1006.6 1007.6 1013.9 1024.4 1023.0 1026.8 1027.3 DAY 6 28 3 4 1 16 22 31 29 28 12 16 MIN. QNH PRESSURE IN HPA 1018.4 1012.0 1003.8 1008.3 1007.3 1001.2 997.0 999.3 1005.0 1012.1 1017.1 1011.9 997.0 DAY 21 13 24 26 17 30 10 5 11 3 27 25 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 952.0 947.5 943.6 943.6 940.6 934.7 930.8 932.7 938.2 946.9 948.2 949.6 942.4 MAX. QFE PRESSURE IN HPA 956.1 950.0 952.5 949.0 946.1 939.5 935.3 936.7 941.7 952.1 951.4 954.5 956.1 DAY 6 20 3 4 3 16 22 29 29 26 12 16 MIN. QFE PRESSURE IN HPA 948.4 943.1 932.7 937.6 936.2 930.0 926.8 929.0 934.6 940.5 945.6 943.0 926.8 DAY 21 13 24 26 16 30 10 4 11 1 27 24 MEAN QNH PRESSURE IN HPA 1021.2 1016.4 1012.3 1012.2 1009.2 1002.9 998.7 1000.8 1006.5 1015.8 1017.1 1018.7 1011.0 MAX. QNH PRESSURE IN HPA 1025.5 1019.1 1021.7 1018.0 1014.9 1008.0 1003.5 1005.0 1010.3 1021.3 1020.6 1023.8 1025.5 DAY 6 20 3 4 3 16 22 29 29 26 12 16 MIN. QNH PRESSURE IN HPA 1017.4 1011.8 1000.8 1005.9 1004.5 997.9 994.5 996.8 1002.8 1009.0 1014.4 1011.7 994.5 DAY 21 13 24 26 16 30 10 4 11 1 27 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 952.5 948.2 943.6 943.3 940.2 934.1 930.0 932.5 938.2 947.0 948.3 950.2 942.3 MAX. QFE PRESSURE IN HPA 956.4 951.2 953.0 948.7 945.6 939.1 934.9 936.4 942.1 952.5 951.3 955.3 956.4 DAY 6 1 3 4 3 7 21 29 25 26 12 16 MIN. QFE PRESSURE IN HPA 949.3 943.9 932.6 936.2 935.3 928.6 925.9 928.0 934.6 940.6 945.8 943.2 925.9 DAY 4 13 24 27 19 30 10 4 11 3 26 24 MEAN QNH PRESSURE IN HPA 1021.7 1017.2 1012.3 1012.0 1008.7 1002.2 997.9 1000.6 1006.5 1015.9 1017.3 1019.2 1011.0 MAX. QNH PRESSURE IN HPA 1025.8 1020.3 1022.2 1017.7 1014.4 1007.5 1003.1 1004.7 1010.7 1021.7 1020.4 1024.7 1025.8 DAY 6 1 3 4 3 7 21 29 25 26 12 16 MIN. QNH PRESSURE IN HPA 1018.3 1012.6 1000.6 1004.5 1003.5 996.4 993.6 995.8 1002.8 1009.1 1014.6 1011.9 993.6 DAY 4 13 24 27 19 30 10 4 11 3 26 24 MEAN QFF PRESSURE IN HPA 1021.9 1015.9 1010.2 1008.7 1003.8 996.3 991.8 994.9 1001.3 1012.5 1015.0 1019.3 1007.6 MAX. QFF PRESSURE IN HPA 1027.2 1019.8 1020.4 1015.9 1010.5 1001.8 997.8 999.3 1006.2 1019.9 1018.0 1024.9 1027.2 DAY 6 20 3 4 3 7 21 27 25 26 12 16 MIN. QFF PRESSURE IN HPA 1017.7 1010.6 998.4 1001.3 997.8 990.5 987.2 989.5 997.5 1004.8 1012.3 1011.7 987.2 DAY 21 13 24 27 16 30 10 4 11 3 26 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 16.4 ***** 23.2 28.5 33.4 39.8 39.2 38.4 35.3 30.2 24.7 18.7 ***** MINIMUN AIR TEMPERATURE (C) 7.7 9.3 13.7 18.1 21.9 27.8 28.4 27.2 23.6 18.4 14.4 10.2 18.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 4 20 30 31 31 22 8 0 0 146 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 1 0 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS LOWEST(C) 0.0 0.0 8.0 14.0 16.0 24.0 23.0 23.0 19.0 14.0 9.0 3.0 0.0 DAY 20 7 27 5 1 6 23 25 25 18 25 31 MAXIMUM AIR TEMPERATURE (C) 22.5 19.7 29.1 34.0 39.2 45.6 45.3 44.8 41.7 36.1 30.9 23.8 34.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 13 28 31 30 31 31 30 31 20 0 245 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.0 26.0 35.0 39.0 44.0 48.0 49.0 47.0 44.0 42.0 34.0 29.0 49.0 DAY 7 29 31 2 24 19 3 1 14 1 7 1 DIF. BETWEEN (MAX.-MIN.) (C) 14.8 10.4 15.4 15.9 17.3 17.8 16.9 17.6 18.1 17.7 16.5 13.6 16.0 MEAN DAILY TEMP. (MDT) (C) 15.1 14.5 21.4 26.0 30.5 36.7 36.9 36.0 32.6 27.2 22.6 17.0 26.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 38.0 151.5 295.5 470.0 491.5 464.5 349.0 193.0 60.0 0.0 2513.0 HEATING DEG. DAYS(BASE 18 0C) 92.5 74.0 2.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 54.0 223.0 DEWPOINT (MEAN C) -0.7 ***** 4.2 5.0 6.1 8.6 6.9 8.0 6.0 5.2 4.9 5.0 ***** MIXING RATIO (G/KG) 4.19 ****** 5.81 6.03 6.44 7.70 6.84 7.43 7.11 6.09 5.91 6.25 ****** VAPOUR PRESSURE (HPA) 6.35 ****** 8.75 9.08 9.65 11.45 10.16 11.05 10.60 9.18 8.95 9.45 ****** SATURATION DEF. (HPA) 13.32 ****** 21.06 31.71 44.16 63.58 63.13 59.22 48.53 35.57 23.48 12.95 ****** RELATIVE HUMIDITY (MEAN %) 34 *** 33 25 20 17 16 18 19 23 29 44 *** RELATIVE HUMIDITY (MAX. %) 49 65 50 42 35 29 28 33 33 36 42 66 42 RELATIVE HUMIDITY (MIN. %) 24 37 21 16 13 10 9 10 12 15 21 31 18 RELATIVE HUMIDITY (MEAN% 03UTC) 47 62 50 40 35 29 28 33 33 35 40 66 42 RELATIVE HUMIDITY (MEAN% 09UTC) 29 44 26 20 14 14 12 12 15 18 24 35 22 RELATIVE HUMIDITY (MEAN% 15UTC) 29 47 26 22 15 12 10 12 16 21 32 42 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.2 74.7 10.3 6.6 1.0 0.0 0.0 0.0 1.0 0.0 0.0 13.0 106.8 DAYS WITH PRECIPITATION >=10 0 2 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 0 4 1 0 0 0 0 0 0 0 0 2 7 DAYS WITH PRECIPITATION >= 1 0 4 2 2 1 0 0 0 1 0 0 2 12 DAYS WITH PRECIPITATION 1 8 3 5 1 0 0 0 1 0 0 3 22 GREATEST DAILY PRECIPITATION 0.2 30.0 8.0 3.0 1.0 0.0 0.0 0.0 1.0 0.0 0.0 8.0 30.0 DAY 26 3 10 25 17 ** ** ** 9 ** ** 9 DAY WITH THUNDER STORM 0 0 1 1 0 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 4 5 1 2 12 4 0 0 0 0 28 WIND DIRECTION (PREVAILING) 45 *** 360 360 45 360 45 315 360 45 315 315 *** PREVAILING WIND SPEED(KNOTS) 5.3 **** 8.8 6.6 5.5 8.8 7.2 7.0 7.5 9.9 11.8 12.5 **** PREVAILING WIND PERCENT 7.1 ***** 18.1 16.0 18.1 11.3 21.3 13.5 2.7 4.5 2.7 2.6 ***** CALMS PERCENT OF WIND 71.6 ***** 59.4 29.3 42.6 73.3 36.8 71.0 92.0 89.7 95.3 94.2 ***** NO. OF WIND OBSERVATION 155 105 155 150 155 150 155 155 150 155 150 155 1790 VECTOR WIND DIRECTION (MEAN) 337 *** 344 334 356 5 1 344 335 350 305 327 *** VECTOR WIND MAGNITUDE(KNOTS) 0.8 **** 2.1 2.1 2.6 1.5 3.5 2.0 0.4 0.8 0.5 0.5 **** WIND STEADINESES (MEAN %) 47.1 ***** 72.4 47.7 72.2 78.9 77.8 83.3 80.0 80.0 83.3 100.0 ***** WIND SPEED (MEAN KNOTS) 1.7 **** 2.9 4.4 3.6 1.9 4.5 2.4 0.5 1.0 0.6 0.5 **** FASTEST WIND DIRECTION 270 *** 310 310 70 20 360 340 360 330 310 330 *** FASTEST WIND SPEED (KNOTS) 15 *** 18 18 18 18 16 30 9 18 15 15 *** DAY 26 ** 19 25 4 23 28 25 16 17 5 4 DAYS WITH SKY CLEAR (0-2)/8 26 10 24 24 26 28 30 30 30 31 28 28 315 DAYS WITH P.CLOUDY (3-6)/8 5 7 5 5 5 2 1 1 0 0 1 2 34 DAYS WITH CLOUDY (7-8)/8 0 4 2 1 0 0 0 0 0 0 1 1 9 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 1 2 1 4 0 0 0 0 8 DURATION OF SUNSHINE HOURS 255.8 135.5 274.6 289.5 342.8 326.3 ****** 321.2 316.7 311.5 284.4 262.7 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 950.3 ****** 947.8 946.3 942.8 936.8 934.6 936.7 941.9 948.0 952.1 951.5 ****** MAX. QFE PRESSURE IN HPA 957.0 ****** 956.5 951.8 949.0 946.2 940.6 944.4 948.6 955.1 958.6 957.9 ****** DAY-HOUR 20- 6 **-** 28- 6 15- 6 2- 6 1- 6 20- 6 28- 6 21- 6 22- 6 24- 6 22- 6 MIN. QFE PRESSURE IN HPA 942.4 ****** 936.7 938.4 935.2 930.2 928.0 931.2 935.5 940.2 946.9 945.9 ****** DAY-HOUR 26-12 **-** 19-15 28-12 30-15 22-15 3-15 15-15 7-15 3-15 18-12 28-12 MEAN QNH PRESSURE IN HPA 1019.4 ****** 1016.8 1015.1 1011.4 1005.1 1002.8 1004.9 1010.5 1017.0 1021.3 1020.6 ****** MAX. QNH PRESSURE IN HPA 1026.5 ****** 1026.0 1021.0 1018.0 1015.1 1009.1 1013.1 1017.6 1024.5 1028.2 1027.4 ****** DAY-HOUR 20- 6 **-** 28- 6 15- 6 2- 6 1- 6 20- 6 28- 6 21- 6 22- 6 24- 6 22- 6 MIN. QNH PRESSURE IN HPA 1011.0 ****** 1005.0 1006.8 1003.4 998.1 995.8 999.2 1003.7 1008.7 1015.8 1014.7 ****** DAY-HOUR 26-12 **-** 19-15 28-12 30-15 22-15 3-15 15-15 7-15 3-15 18-12 28-12 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 950.9 952.3 948.6 947.5 944.3 938.3 936.0 938.2 943.8 949.6 953.0 952.3 946.2 MAX. QFE PRESSURE IN HPA 955.3 957.0 955.1 951.0 948.7 945.4 940.0 943.9 947.7 954.3 957.1 957.0 957.1 DAY 20 7 28 1 2 1 20 28 21 17 24 22 MIN. QFE PRESSURE IN HPA 946.0 945.0 939.0 942.4 939.0 934.0 931.7 935.2 940.0 944.3 949.7 946.1 931.7 DAY 26 3 19 25 30 22 9 1 8 8 11 9 MEAN QNH PRESSURE IN HPA 1020.0 1021.5 1017.6 1016.5 1013.1 1006.7 1004.3 1006.6 1012.5 1018.7 1022.2 1021.5 1015.1 MAX. QNH PRESSURE IN HPA 1024.7 1026.5 1024.5 1020.1 1017.7 1014.2 1008.5 1012.6 1016.6 1023.6 1026.6 1026.5 1026.6 DAY 20 7 28 1 2 1 20 28 21 17 24 22 MIN. QNH PRESSURE IN HPA 1014.8 1013.8 1007.4 1011.0 1007.4 1002.1 999.7 1003.4 1008.5 1013.0 1018.8 1014.9 999.7 DAY 26 3 19 25 30 22 9 1 8 8 11 9 MEAN QFF PRESSURE IN HPA 1019.9 1021.1 1015.7 1013.2 1008.7 1000.7 998.5 1001.0 1007.7 1015.1 1020.2 1020.6 1011.9 MAX. QFF PRESSURE IN HPA 1026.2 1028.5 1023.8 1017.0 1014.6 1008.9 1003.2 1007.5 1012.8 1020.2 1025.5 1026.2 1028.5 DAY 20 7 28 1 2 1 20 30 21 30 24 22 MIN. QFF PRESSURE IN HPA 1013.1 1012.6 1004.4 1006.8 1002.5 996.2 993.4 997.5 1003.2 1008.6 1016.2 1012.9 993.4 DAY 26 3 19 25 30 22 9 1 8 8 19 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 952.5 953.7 950.0 948.5 945.0 938.9 936.7 938.9 944.4 950.2 954.6 953.9 947.3 MAX. QFE PRESSURE IN HPA 957.0 959.4 956.5 951.8 949.0 946.2 940.6 944.4 948.6 955.1 958.6 957.9 959.4 DAY 20 7 28 15 2 1 20 28 21 22 24 22 MIN. QFE PRESSURE IN HPA 946.0 947.0 940.7 943.3 940.0 934.4 932.5 935.8 940.8 944.4 950.9 948.2 932.5 DAY 26 3 19 25 30 22 9 9 5 8 1 9 MEAN QNH PRESSURE IN HPA 1021.7 1023.0 1019.0 1017.5 1013.7 1007.3 1004.9 1007.3 1013.1 1019.3 1023.9 1023.2 1016.2 MAX. QNH PRESSURE IN HPA 1026.5 1029.0 1026.0 1021.0 1018.0 1015.1 1009.1 1013.1 1017.6 1024.5 1028.2 1027.4 1029.0 DAY 20 7 28 15 2 1 20 28 21 22 24 22 MIN. QNH PRESSURE IN HPA 1014.8 1015.9 1009.2 1012.0 1008.5 1002.6 1000.5 1004.0 1009.3 1013.1 1020.0 1017.2 1000.5 DAY 26 3 19 25 30 22 9 9 5 8 1 9 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 950.7 952.1 948.3 946.8 943.3 937.4 935.2 937.3 942.5 948.3 952.3 951.6 945.5 MAX. QFE PRESSURE IN HPA 954.6 957.3 954.5 951.0 947.3 944.6 938.8 942.9 947.0 953.9 956.4 955.8 957.3 DAY 20 7 28 27 2 1 20 29 20 30 24 17 MIN. QFE PRESSURE IN HPA 945.0 945.7 939.1 941.6 938.0 932.5 931.3 934.3 938.4 942.5 948.6 947.9 931.3 DAY 26 3 19 28 30 22 9 1 7 8 1 28 MEAN QNH PRESSURE IN HPA 1019.8 1021.3 1017.3 1015.7 1012.0 1005.7 1003.3 1005.6 1011.1 1017.3 1021.5 1020.7 1014.3 MAX. QNH PRESSURE IN HPA 1023.9 1026.8 1023.8 1020.1 1016.2 1013.4 1007.2 1011.6 1015.9 1023.2 1025.8 1025.2 1026.8 DAY 20 7 28 27 2 1 20 29 20 30 24 17 MIN. QNH PRESSURE IN HPA 1013.8 1014.5 1007.5 1010.2 1006.4 1000.5 999.3 1002.4 1006.8 1011.1 1017.6 1016.8 999.3 DAY 26 3 19 28 30 22 9 1 7 8 1 28 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 948.6 950.2 946.0 944.3 940.9 935.0 933.0 934.7 939.6 946.1 950.3 949.8 943.2 MAX. QFE PRESSURE IN HPA 952.2 954.8 951.7 948.3 945.3 942.6 936.2 940.5 943.5 951.0 954.3 954.3 954.8 DAY 19 7 28 27 2 1 20 28 21 30 24 17 MIN. QFE PRESSURE IN HPA 942.4 944.7 937.0 938.4 935.6 930.5 928.8 931.7 935.7 940.3 946.9 945.9 928.8 DAY 26 3 19 28 30 22 3 9 7 4 18 28 MEAN QNH PRESSURE IN HPA 1017.5 1019.3 1014.9 1013.1 1009.5 1003.2 1001.0 1002.9 1008.1 1014.9 1019.4 1018.9 1011.9 MAX. QNH PRESSURE IN HPA 1021.4 1024.2 1020.9 1017.3 1014.1 1011.2 1004.5 1009.0 1012.2 1020.1 1023.6 1023.6 1024.2 DAY 19 7 28 27 2 1 20 28 21 30 24 17 MIN. QNH PRESSURE IN HPA 1011.0 1013.5 1005.3 1006.8 1003.8 998.4 996.6 999.7 1003.9 1008.8 1015.8 1014.7 996.6 DAY 26 3 19 28 30 22 3 9 7 4 18 28 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 949.0 950.6 946.3 944.4 940.5 934.5 932.4 934.3 939.3 945.9 950.6 949.8 943.1 MAX. QFE PRESSURE IN HPA 953.8 955.8 952.0 947.6 945.0 941.5 935.4 940.1 943.4 951.0 954.5 954.3 955.8 DAY 19 7 28 15 1 1 20 28 21 30 24 17 MIN. QFE PRESSURE IN HPA 943.4 945.2 936.7 939.0 935.2 930.2 928.0 931.2 935.5 940.2 947.0 945.9 928.0 DAY 26 12 19 23 30 22 3 15 7 3 1 28 MEAN QNH PRESSURE IN HPA 1018.0 1019.8 1015.1 1013.2 1009.0 1002.6 1000.5 1002.4 1007.7 1014.7 1019.7 1018.9 1011.8 MAX. QNH PRESSURE IN HPA 1023.1 1025.2 1021.2 1016.5 1013.8 1010.1 1003.6 1008.6 1012.1 1020.1 1023.8 1023.6 1025.2 DAY 19 7 28 15 1 1 20 28 21 30 24 17 MIN. QNH PRESSURE IN HPA 1012.1 1014.0 1005.0 1007.4 1003.4 998.1 995.8 999.2 1003.7 1008.7 1015.9 1014.7 995.8 DAY 26 12 19 23 30 22 3 15 7 3 1 28 MEAN QFF PRESSURE IN HPA 1017.8 1019.4 1013.1 1009.9 1004.7 996.7 994.7 996.8 1003.0 1011.1 1017.7 1018.0 1008.6 MAX. QFF PRESSURE IN HPA 1023.8 1027.2 1020.4 1013.4 1010.7 1004.6 998.3 1003.7 1008.1 1017.7 1022.8 1022.6 1027.2 DAY 19 7 28 15 2 1 20 30 21 30 24 24 MIN. QFF PRESSURE IN HPA 1010.6 1012.6 1002.3 1003.4 998.4 992.2 989.6 993.1 998.7 1003.9 1013.5 1013.6 989.6 DAY 26 12 19 23 30 22 3 15 7 4 1 28 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 15.4 17.6 28.0 30.2 35.2 38.9 40.1 38.3 34.3 31.3 21.6 20.5 29.3 MINIMUN AIR TEMPERATURE (C) 7.8 9.0 17.0 19.4 24.0 26.5 30.2 27.4 21.9 20.6 11.5 10.4 18.8 DAYS WITH MINIMUM TEMP. >=21 0 0 3 11 28 30 31 31 24 14 0 0 172 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS LOWEST(C) -1.0 1.0 11.0 13.0 17.0 22.0 27.0 22.0 16.0 18.0 5.0 7.0 -1.0 DAY 2 4 27 16 14 5 1 1 16 24 23 11 MAXIMUM AIR TEMPERATURE (C) 20.5 22.7 34.2 35.8 40.6 44.5 45.4 43.5 39.8 37.3 27.5 26.5 34.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 30 28 31 30 31 31 30 31 10 1 253 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 28.0 29.0 38.0 40.0 45.0 48.0 48.0 46.0 43.0 40.0 33.0 30.0 48.0 DAY 23 28 15 2 20 29 19 5 11 1 1 6 DIF. BETWEEN (MAX.-MIN.) (C) 12.7 13.7 17.2 16.4 16.6 18.0 15.2 16.1 17.9 16.7 16.0 16.1 16.1 MEAN DAILY TEMP. (MDT) (C) 14.1 15.8 25.6 27.6 32.3 35.5 37.8 35.4 30.9 28.9 19.5 18.5 26.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 142.5 197.5 351.0 436.0 521.0 447.5 296.0 246.0 36.5 0.5 2674.5 HEATING DEG. DAYS(BASE 18 0C) 128.5 76.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28.5 11.5 245.0 DEWPOINT (MEAN C) 1.0 1.0 6.0 7.1 7.7 9.3 12.5 9.8 8.1 8.2 2.6 3.6 6.4 MIXING RATIO (G/KG) 4.96 4.92 6.43 6.94 7.44 8.09 10.47 8.61 7.57 7.39 5.35 5.49 6.97 VAPOUR PRESSURE (HPA) 7.52 7.45 9.69 10.43 11.13 12.02 15.43 12.78 11.32 11.13 8.09 8.32 10.44 SATURATION DEF. (HPA) 11.10 13.69 29.90 34.24 48.14 59.60 60.45 56.49 45.17 36.53 19.48 16.98 35.98 RELATIVE HUMIDITY (MEAN %) 46 39 27 26 20 18 23 20 21 25 31 35 28 RELATIVE HUMIDITY (MAX. %) 70 63 46 43 34 29 36 35 32 38 46 49 43 RELATIVE HUMIDITY (MIN. %) 32 26 17 17 15 12 14 12 16 17 21 25 19 RELATIVE HUMIDITY (MEAN% 03UTC) 67 63 46 41 34 29 35 34 31 38 46 46 43 RELATIVE HUMIDITY (MEAN% 09UTC) 37 32 21 20 16 14 18 16 18 19 23 29 22 RELATIVE HUMIDITY (MEAN% 15UTC) 43 30 24 24 17 16 18 15 19 26 32 38 25 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 33.8 29.5 0.0 1.0 0.0 0.0 28.0 0.6 0.0 0.0 0.0 0.0 92.9 DAYS WITH PRECIPITATION >=10 2 1 0 0 0 0 1 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 3 2 0 0 0 0 1 0 0 0 0 0 6 DAYS WITH PRECIPITATION >= 1 4 3 0 1 0 0 2 0 0 0 0 0 10 DAYS WITH PRECIPITATION 8 3 0 2 0 0 3 1 0 0 0 0 17 GREATEST DAILY PRECIPITATION 14.0 22.5 0.0 1.0 0.0 0.0 27.0 0.6 0.0 0.0 0.0 0.0 27.0 DAY 11 15 ** 9 ** ** 31 1 ** ** ** ** DAY WITH THUNDER STORM 0 0 0 1 0 0 2 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 0 5 4 3 8 7 5 3 0 0 0 38 WIND DIRECTION (PREVAILING) 315 135 315 315 135 45 90 135 315 315 270 225 315 PREVAILING WIND SPEED(KNOTS) 8.4 5.3 17.8 23.5 8.9 15.6 18.0 15.0 16.2 6.3 5.0 4.9 13.5 PREVAILING WIND PERCENT 5.8 6.4 9.0 12.0 7.7 6.0 7.7 3.9 4.0 14.3 6.0 4.5 5.6 CALMS PERCENT OF WIND 76.8 84.3 89.0 84.0 74.8 65.3 67.7 84.5 84.7 55.9 80.7 80.6 77.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 161 150 155 1831 VECTOR WIND DIRECTION (MEAN) 208 154 314 315 186 356 58 149 284 319 260 272 313 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.3 1.7 3.2 0.7 0.7 1.5 0.6 0.2 1.0 0.8 0.6 0.5 WIND STEADINESES (MEAN %) 15.8 30.0 94.4 88.9 24.1 12.3 26.3 25.0 10.5 40.0 72.7 60.0 19.2 WIND SPEED (MEAN KNOTS) 1.9 1.0 1.8 3.6 2.9 5.7 5.7 2.4 1.9 2.5 1.1 1.0 2.6 FASTEST WIND DIRECTION 330 360 330 330 210 330 60 40 330 330 300 330 60 FASTEST WIND SPEED (KNOTS) 15 15 48 42 40 40 80 32 24 12 12 12 80 DAY 1 21 24 14 12 11 31 23 6 1 5 27 DAYS WITH SKY CLEAR (0-2)/8 20 20 23 19 26 29 22 24 29 28 19 22 281 DAYS WITH P.CLOUDY (3-6)/8 4 5 8 9 5 1 8 7 0 3 9 6 65 DAYS WITH CLOUDY (7-8)/8 7 3 0 2 0 0 1 0 0 0 2 3 18 DAYS WITH VISIBILITY =< 2 KM 6 0 1 0 1 3 3 1 1 0 0 0 16 DURATION OF SUNSHINE HOURS 206.2 243.6 300.7 265.2 354.7 320.7 301.0 298.3 308.7 312.7 ****** 280.7 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 951.1 950.8 947.2 945.8 942.0 937.2 933.5 937.2 942.6 947.5 951.4 952.5 944.9 MAX. QFE PRESSURE IN HPA 957.1 958.0 953.5 951.9 947.8 944.9 938.2 945.2 950.1 953.3 960.5 958.0 960.5 DAY-HOUR 9- 6 3- 6 3- 6 7- 6 4- 6 3- 6 27- 6 24- 6 14- 6 26- 6 24- 6 22- 6 MIN. QFE PRESSURE IN HPA 941.9 944.4 941.7 941.1 934.9 931.5 927.8 929.5 936.1 942.5 945.6 947.0 927.8 DAY-HOUR 25-12 14-12 18-12 17-12 29-15 30-15 22-12 6-12 12-12 1-12 9-12 7-12 MEAN QNH PRESSURE IN HPA 1020.2 1019.9 1016.1 1014.7 1010.6 1005.6 1001.6 1005.5 1011.3 1016.4 1020.6 1021.8 1013.7 MAX. QNH PRESSURE IN HPA 1026.6 1027.5 1022.8 1021.1 1016.7 1013.7 1006.6 1014.0 1019.2 1022.6 1030.2 1027.5 1030.2 DAY-HOUR 9- 6 3- 6 3- 6 7- 6 4- 6 3- 6 27- 6 24- 6 14- 6 26- 6 24- 6 22- 6 MIN. QNH PRESSURE IN HPA 1010.5 1013.1 1010.3 1009.6 1003.1 999.5 995.6 997.4 1004.4 1011.1 1014.4 1015.9 995.6 DAY-HOUR 25-12 14-12 18-12 17-12 29-15 30-15 22-12 6-12 12-12 1-12 9-12 7-12 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 951.6 951.3 948.4 946.9 943.3 938.6 934.8 938.2 943.8 948.7 952.6 953.3 946.0 MAX. QFE PRESSURE IN HPA 956.3 957.5 952.7 950.3 947.1 944.5 937.0 944.1 949.2 952.2 958.9 956.1 958.9 DAY 13 4 1 7 4 3 27 25 14 26 24 18 MIN. QFE PRESSURE IN HPA 943.6 945.8 944.2 943.4 938.6 935.4 931.7 932.3 939.0 945.5 948.4 950.2 931.7 DAY 25 15 18 17 31 23 18 7 12 2 4 7 MEAN QNH PRESSURE IN HPA 1020.8 1020.5 1017.4 1015.8 1011.9 1007.0 1003.0 1006.5 1012.5 1017.7 1021.8 1022.6 1014.8 MAX. QNH PRESSURE IN HPA 1025.7 1027.0 1021.9 1019.4 1016.0 1013.2 1005.3 1012.8 1018.2 1021.4 1028.5 1025.5 1028.5 DAY 13 4 1 7 4 3 27 25 14 26 24 18 MIN. QNH PRESSURE IN HPA 1012.3 1014.6 1012.9 1012.1 1007.0 1003.6 999.7 1000.3 1007.4 1014.3 1017.4 1019.3 999.7 DAY 25 15 18 17 31 23 18 7 12 2 4 7 MEAN QFF PRESSURE IN HPA 1020.6 1019.8 1014.4 1012.2 1007.2 1001.3 996.7 1000.9 1008.1 1014.0 1020.5 1021.5 1011.4 MAX. QFF PRESSURE IN HPA 1026.9 1028.2 1019.7 1015.6 1011.5 1008.6 998.9 1007.6 1014.4 1018.0 1028.8 1024.8 1028.8 DAY 13 4 1 7 4 3 27 25 14 31 24 12 MIN. QFF PRESSURE IN HPA 1010.1 1013.2 1009.1 1007.7 1001.5 997.5 993.7 994.4 1002.0 1009.8 1014.3 1017.5 993.7 DAY 25 12 24 14 31 23 18 7 12 2 4 7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 952.7 952.8 949.8 948.0 944.2 939.5 935.8 939.5 945.2 950.0 954.0 955.0 947.2 MAX. QFE PRESSURE IN HPA 957.1 958.0 953.5 951.9 947.8 944.9 938.2 945.2 950.1 953.3 960.5 958.0 960.5 DAY 9 3 3 7 4 3 27 24 14 26 24 22 MIN. QFE PRESSURE IN HPA 945.1 946.2 945.7 943.9 939.4 935.6 932.9 934.1 940.0 947.2 949.0 951.6 932.9 DAY 25 15 18 17 31 23 18 7 12 19 9 7 MEAN QNH PRESSURE IN HPA 1021.9 1022.0 1018.8 1016.9 1013.0 1007.9 1004.0 1008.0 1014.0 1019.1 1023.3 1024.3 1016.1 MAX. QNH PRESSURE IN HPA 1026.6 1027.5 1022.8 1021.1 1016.7 1013.7 1006.6 1014.0 1019.2 1022.6 1030.2 1027.5 1030.2 DAY 9 3 3 7 4 3 27 24 14 26 24 22 MIN. QNH PRESSURE IN HPA 1013.9 1015.1 1014.5 1012.6 1007.8 1003.8 1001.0 1002.2 1008.5 1016.1 1018.0 1020.8 1001.0 DAY 25 15 18 17 31 23 18 7 12 19 9 7 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 951.4 951.5 947.8 946.2 942.6 937.9 934.1 937.7 943.0 947.1 951.1 952.4 945.2 MAX. QFE PRESSURE IN HPA 956.4 956.9 952.1 949.6 946.4 942.7 936.5 943.2 948.2 949.8 957.0 955.4 957.0 DAY 12 4 3 7 4 3 27 24 14 25 24 17 MIN. QFE PRESSURE IN HPA 944.2 946.4 943.9 942.5 938.2 934.3 931.2 932.1 938.3 944.4 946.8 949.1 931.2 DAY 25 14 18 17 31 23 18 7 12 19 9 7 MEAN QNH PRESSURE IN HPA 1020.6 1020.6 1016.8 1015.1 1011.2 1006.2 1002.3 1006.1 1011.7 1016.1 1020.2 1021.7 1014.0 MAX. QNH PRESSURE IN HPA 1025.8 1026.4 1021.3 1018.6 1015.3 1011.3 1004.8 1011.9 1017.2 1018.9 1026.5 1024.8 1026.5 DAY 12 4 3 7 4 3 27 24 14 25 24 17 MIN. QNH PRESSURE IN HPA 1012.9 1015.3 1012.6 1011.1 1006.6 1002.4 999.2 1000.1 1006.7 1013.1 1015.7 1018.1 999.2 DAY 25 14 18 17 31 23 18 7 12 19 9 7 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 949.8 949.2 945.0 944.0 940.1 935.4 931.8 935.4 940.7 945.5 949.5 950.9 943.1 MAX. QFE PRESSURE IN HPA 954.8 954.5 949.3 947.8 944.1 940.3 934.1 940.9 945.2 948.8 955.7 953.9 955.7 DAY 9 3 3 14 4 3 31 24 14 25 24 17 MIN. QFE PRESSURE IN HPA 941.9 944.4 941.7 941.1 935.4 932.0 927.8 929.5 936.1 942.5 945.6 947.0 927.8 DAY 25 14 18 17 29 30 22 6 12 1 9 7 MEAN QNH PRESSURE IN HPA 1018.8 1018.2 1013.8 1012.7 1008.6 1003.6 999.8 1003.6 1009.2 1014.3 1018.6 1020.0 1011.8 MAX. QNH PRESSURE IN HPA 1024.2 1023.8 1018.3 1016.7 1012.8 1008.8 1002.2 1009.4 1014.0 1017.8 1025.1 1023.2 1025.1 DAY 9 3 3 14 4 3 31 24 14 25 24 17 MIN. QNH PRESSURE IN HPA 1010.5 1013.1 1010.3 1009.6 1003.6 1000.0 995.6 997.4 1004.4 1011.1 1014.4 1015.9 995.6 DAY 25 14 18 17 29 30 22 6 12 1 9 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 950.0 949.3 945.0 944.1 939.7 935.0 931.2 935.1 940.5 945.9 950.1 951.2 943.1 MAX. QFE PRESSURE IN HPA 955.8 954.8 949.3 947.8 944.1 940.3 934.2 940.9 945.2 949.5 956.5 955.0 956.5 DAY 9 4 3 14 4 3 31 24 14 31 24 17 MIN. QFE PRESSURE IN HPA 942.2 944.4 941.7 941.1 934.9 931.5 927.8 929.5 936.1 943.1 946.2 947.0 927.8 DAY 25 14 18 17 29 30 22 6 12 19 9 7 MEAN QNH PRESSURE IN HPA 1019.0 1018.4 1013.8 1012.8 1008.2 1003.1 999.2 1003.3 1009.1 1014.7 1019.1 1020.3 1011.7 MAX. QNH PRESSURE IN HPA 1025.2 1024.2 1018.3 1016.7 1012.8 1008.8 1002.3 1009.4 1014.0 1018.5 1026.0 1024.4 1026.0 DAY 9 4 3 14 4 3 31 24 14 31 24 17 MIN. QNH PRESSURE IN HPA 1010.8 1013.1 1010.3 1009.6 1003.1 999.5 995.6 997.4 1004.4 1011.8 1015.1 1015.9 995.6 DAY 25 14 18 17 29 30 22 6 12 19 9 7 MEAN QFF PRESSURE IN HPA 1018.8 1017.6 1010.7 1009.2 1003.4 997.5 993.0 997.7 1004.6 1011.0 1017.8 1019.1 1008.4 MAX. QFF PRESSURE IN HPA 1025.3 1025.1 1015.6 1013.2 1008.1 1004.2 996.6 1004.2 1010.6 1015.5 1026.1 1023.4 1026.1 DAY 9 4 3 14 4 3 31 24 15 31 24 17 MIN. QFF PRESSURE IN HPA 1008.6 1012.3 1007.1 1005.6 997.6 993.3 989.2 991.5 999.0 1008.1 1012.7 1014.3 989.2 DAY 25 22 21 27 29 30 22 7 12 19 3 7 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 16.0 20.8 23.2 31.4 36.5 39.7 39.1 38.3 34.2 30.5 24.7 18.3 29.4 MINIMUN AIR TEMPERATURE (C) 8.6 10.9 14.0 19.7 24.5 29.8 30.4 29.8 24.0 19.7 12.7 8.8 19.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 8 30 30 31 31 21 14 0 0 165 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 1.0 4.0 10.0 15.0 20.0 26.0 26.0 24.0 16.0 12.0 9.0 1.0 1.0 DAY 30 1 7 2 10 7 2 27 25 29 29 17 MAXIMUM AIR TEMPERATURE (C) 20.9 26.2 28.7 37.4 43.1 45.2 44.4 43.4 39.9 36.2 31.1 24.3 35.1 DAYS WITH MAXIMUM TEMP. >=30 0 1 14 30 31 30 31 31 30 31 23 2 254 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.0 30.0 36.0 40.0 48.0 49.0 48.0 48.0 43.0 40.0 36.0 30.0 49.0 DAY 6 28 23 18 28 2 28 5 1 2 7 9 DIF. BETWEEN (MAX.-MIN.) (C) 12.3 15.3 14.7 17.7 18.6 15.4 14.0 13.6 15.9 16.5 18.4 15.5 15.7 MEAN DAILY TEMP. (MDT) (C) 14.7 18.6 21.4 28.6 33.8 37.5 37.4 36.6 31.9 28.0 21.9 16.5 27.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.5 45.5 227.0 397.0 495.5 507.5 483.0 328.5 216.0 42.0 0.5 2743.0 HEATING DEG. DAYS(BASE 18 0C) 102.0 20.0 6.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 66.5 194.5 DEWPOINT (MEAN C) 6.0 4.6 6.5 6.7 12.7 14.5 12.7 17.4 11.9 9.5 5.9 3.0 9.3 MIXING RATIO (G/KG) 6.43 5.75 6.64 6.76 10.30 11.73 10.65 14.03 10.17 8.85 6.33 5.41 8.59 VAPOUR PRESSURE (HPA) 9.73 8.70 10.00 10.16 15.31 17.30 15.69 20.59 15.07 13.23 9.58 8.20 12.80 SATURATION DEF. (HPA) 9.26 16.99 20.15 37.84 48.87 57.28 56.53 48.62 41.19 32.61 23.47 14.22 33.92 RELATIVE HUMIDITY (MEAN %) 56 37 39 23 26 25 24 33 29 30 32 39 33 RELATIVE HUMIDITY (MAX. %) 77 59 59 39 39 42 42 52 48 44 44 58 50 RELATIVE HUMIDITY (MIN. %) 41 26 27 16 19 16 15 21 18 22 24 26 23 RELATIVE HUMIDITY (MEAN% 03UTC) 76 59 59 39 39 42 42 52 47 43 43 55 50 RELATIVE HUMIDITY (MEAN% 09UTC) 50 30 32 18 21 20 19 27 23 25 26 30 27 RELATIVE HUMIDITY (MEAN% 15UTC) 53 32 32 21 22 21 20 26 23 29 34 41 30 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.5 1.5 14.8 0.0 0.3 3.4 23.0 11.3 34.0 0.0 0.0 9.0 136.8 DAYS WITH PRECIPITATION >=10 0 0 1 0 0 0 1 0 1 0 0 0 3 DAYS WITH PRECIPITATION >= 5 5 0 1 0 0 0 2 1 1 0 0 1 11 DAYS WITH PRECIPITATION >= 1 6 1 3 0 0 1 2 2 1 0 0 1 17 DAYS WITH PRECIPITATION 9 2 6 0 1 2 6 7 2 0 0 2 37 GREATEST DAILY PRECIPITATION 8.0 1.1 12.0 0.0 0.3 3.0 13.0 9.0 34.0 0.0 0.0 9.0 34.0 DAY 9 26 6 ** 4 29 1 27 8 ** ** 3 DAY WITH THUNDER STORM 0 0 0 0 0 1 3 1 0 0 0 0 5 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 1 2 3 0 8 5 3 2 6 2 1 33 WIND DIRECTION (PREVAILING) 225 180 135 180 180 180 135 180 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 5.9 10.0 7.6 9.5 9.6 11.5 11.4 9.7 8.0 7.4 5.0 6.2 8.8 PREVAILING WIND PERCENT 12.9 10.7 11.6 16.0 11.0 19.3 19.4 18.7 16.7 19.4 10.0 9.7 13.0 CALMS PERCENT OF WIND 60.6 60.0 65.8 58.0 71.6 57.3 44.5 37.4 64.7 61.9 69.3 81.3 61.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 239 221 172 183 175 174 174 183 152 181 234 223 183 VECTOR WIND MAGNITUDE(KNOTS) 1.1 1.6 1.1 2.8 2.0 2.8 3.7 3.3 2.4 1.8 0.5 0.9 1.9 WIND STEADINESES (MEAN %) 47.8 48.5 44.0 70.0 74.1 57.1 56.9 57.9 70.6 58.1 27.8 60.0 54.3 WIND SPEED (MEAN KNOTS) 2.3 3.3 2.5 4.0 2.7 4.9 6.5 5.7 3.4 3.1 1.8 1.5 3.5 FASTEST WIND DIRECTION 300 180 180 210 180 150 300 160 90 120 270 240 300 FASTEST WIND SPEED (KNOTS) 15 15 20 25 20 25 30 20 25 18 15 20 30 DAY 29 4 5 21 3 1 5 10 2 8 15 15 DAYS WITH SKY CLEAR (0-2)/8 13 20 17 22 27 25 22 15 27 30 28 16 262 DAYS WITH P.CLOUDY (3-6)/8 13 6 12 4 4 4 9 11 3 1 2 13 82 DAYS WITH CLOUDY (7-8)/8 5 2 2 4 0 1 0 5 0 0 0 2 21 DAYS WITH VISIBILITY =< 2 KM 2 1 1 0 0 3 2 3 1 0 0 0 13 DURATION OF SUNSHINE HOURS 244.6 261.2 279.6 296.3 348.8 278.1 315.5 277.4 291.6 317.6 311.4 283.3 3505.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 951.4 950.0 947.3 946.0 940.6 936.1 934.1 934.8 939.9 946.8 951.5 952.9 944.3 MAX. QFE PRESSURE IN HPA 959.6 959.1 953.5 951.4 946.5 940.6 939.4 940.1 948.9 955.0 958.1 960.4 960.4 DAY-HOUR 3- 6 4- 6 3- 6 5- 6 1- 6 16- 6 23- 6 24- 6 22- 6 27- 6 15- 6 30- 6 MIN. QFE PRESSURE IN HPA 944.0 941.4 940.5 940.2 932.5 931.2 928.3 927.8 932.0 938.8 946.1 944.5 927.8 DAY-HOUR 28-15 26-12 13-15 18-15 31-15 28-15 16-15 7-15 9-15 5-15 30-12 1-15 MEAN QNH PRESSURE IN HPA 1020.6 1019.1 1016.2 1014.8 1009.2 1004.3 1002.2 1003.0 1008.4 1015.7 1020.7 1022.1 1013.0 MAX. QNH PRESSURE IN HPA 1029.2 1028.7 1022.8 1020.6 1015.4 1009.1 1007.8 1008.6 1017.9 1024.4 1027.6 1030.1 1030.1 DAY-HOUR 3- 6 4- 6 3- 6 5- 6 1- 6 16- 6 23- 6 24- 6 22- 6 27- 6 15- 6 30- 6 MIN. QNH PRESSURE IN HPA 1012.7 1010.0 1009.0 1008.7 1000.5 999.2 996.1 995.6 1000.0 1007.2 1014.9 1013.2 995.6 DAY-HOUR 28-15 26-12 13-15 18-15 31-15 28-15 16-15 7-15 9-15 5-15 30-12 1-15 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 952.0 950.8 948.0 947.3 942.0 937.6 935.8 936.6 941.1 948.0 952.7 953.9 945.5 MAX. QFE PRESSURE IN HPA 957.7 956.7 951.7 950.0 945.6 940.0 938.7 939.4 947.8 953.4 956.4 959.3 959.3 DAY 3 4 3 5 11 16 9 24 22 30 15 31 MIN. QFE PRESSURE IN HPA 948.0 943.7 941.4 943.9 936.7 935.5 932.7 933.4 936.0 942.7 950.2 947.6 932.7 DAY 23 23 6 19 30 23 16 7 1 5 25 1 MEAN QNH PRESSURE IN HPA 1021.2 1019.9 1016.9 1016.2 1010.6 1005.9 1004.0 1004.9 1009.7 1016.9 1021.9 1023.3 1014.3 MAX. QNH PRESSURE IN HPA 1027.2 1026.2 1020.9 1019.1 1014.4 1008.5 1007.1 1007.8 1016.7 1022.7 1025.8 1028.9 1028.9 DAY 3 4 3 5 11 16 9 24 22 30 15 31 MIN. QNH PRESSURE IN HPA 1017.0 1012.4 1010.0 1012.6 1005.0 1003.7 1000.8 1001.5 1004.2 1011.3 1019.3 1016.5 1000.8 DAY 23 23 6 19 30 23 16 7 1 5 25 1 MEAN QFF PRESSURE IN HPA 1020.7 1018.5 1014.8 1012.4 1005.5 999.7 998.0 998.9 1004.9 1013.3 1020.1 1022.7 1010.8 MAX. QFF PRESSURE IN HPA 1026.6 1025.9 1018.8 1015.8 1009.7 1002.8 1001.2 1002.4 1013.3 1020.6 1023.6 1029.0 1029.0 DAY 3 4 3 28 1 16 9 24 22 31 15 17 MIN. QFF PRESSURE IN HPA 1015.6 1009.7 1008.1 1008.3 998.7 997.3 994.3 994.7 997.7 1006.6 1017.7 1014.9 994.3 DAY 24 23 6 19 31 29 16 7 1 5 25 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 953.7 952.4 949.7 948.5 942.9 938.4 936.4 937.4 942.5 949.4 953.9 955.2 946.7 MAX. QFE PRESSURE IN HPA 959.6 959.1 953.5 951.4 946.5 940.6 939.4 940.1 948.9 955.0 958.1 960.4 960.4 DAY 3 4 3 5 1 16 23 24 22 27 15 30 MIN. QFE PRESSURE IN HPA 948.6 946.5 942.4 945.4 936.9 935.9 932.8 933.6 938.2 944.3 951.3 948.8 932.8 DAY 28 24 6 19 30 23 16 6 10 5 25 1 MEAN QNH PRESSURE IN HPA 1023.0 1021.6 1018.7 1017.5 1011.6 1006.8 1004.6 1005.8 1011.2 1018.4 1023.2 1024.5 1015.6 MAX. QNH PRESSURE IN HPA 1029.2 1028.7 1022.8 1020.6 1015.4 1009.1 1007.8 1008.6 1017.9 1024.4 1027.6 1030.1 1030.1 DAY 3 4 3 5 1 16 23 24 22 27 15 30 MIN. QNH PRESSURE IN HPA 1017.6 1015.4 1011.0 1014.2 1005.2 1004.1 1000.9 1001.7 1006.6 1013.0 1020.4 1017.8 1000.9 DAY 28 24 6 19 30 23 16 6 10 5 25 1 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 951.5 950.5 948.1 946.6 941.3 936.8 934.5 935.3 940.4 947.0 951.7 953.2 944.7 MAX. QFE PRESSURE IN HPA 955.6 956.1 951.9 950.0 945.3 939.3 937.1 938.1 946.4 952.5 955.9 957.8 957.8 DAY 30 4 3 5 10 11 25 30 23 29 15 31 MIN. QFE PRESSURE IN HPA 945.9 944.0 942.7 943.6 935.8 934.7 931.0 931.7 935.4 942.0 948.2 946.6 931.0 DAY 28 26 13 19 25 23 16 6 1 5 30 1 MEAN QNH PRESSURE IN HPA 1020.7 1019.6 1017.0 1015.4 1009.8 1005.1 1002.7 1003.5 1008.9 1015.9 1020.9 1022.4 1013.5 MAX. QNH PRESSURE IN HPA 1025.0 1025.5 1021.1 1019.1 1014.1 1007.7 1005.4 1006.5 1015.3 1021.7 1025.3 1027.3 1027.3 DAY 30 4 3 5 10 11 25 30 23 29 15 31 MIN. QNH PRESSURE IN HPA 1014.7 1012.7 1011.3 1012.3 1004.0 1002.9 999.0 999.7 1003.6 1010.6 1017.2 1015.5 999.0 DAY 28 26 13 19 25 23 16 6 1 5 30 1 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 949.9 948.2 945.5 943.9 938.7 934.1 932.1 932.7 937.7 944.9 949.7 951.0 942.4 MAX. QFE PRESSURE IN HPA 953.6 954.3 948.8 947.4 943.1 936.4 935.7 934.7 944.0 951.3 952.7 956.3 956.3 DAY 30 4 9 27 23 16 22 24 22 29 14 30 MIN. QFE PRESSURE IN HPA 944.3 941.4 940.7 940.6 932.7 931.9 928.8 929.0 932.7 939.3 946.1 945.0 928.8 DAY 28 26 13 18 29 23 5 6 9 5 30 1 MEAN QNH PRESSURE IN HPA 1019.0 1017.2 1014.3 1012.7 1007.1 1002.3 1000.1 1000.8 1006.1 1013.7 1018.8 1020.2 1011.0 MAX. QNH PRESSURE IN HPA 1022.9 1023.6 1017.8 1016.3 1011.8 1004.7 1003.9 1002.9 1012.7 1020.4 1021.9 1025.7 1025.7 DAY 30 4 9 27 23 16 22 24 22 29 14 30 MIN. QNH PRESSURE IN HPA 1013.0 1010.0 1009.2 1009.1 1000.8 999.9 996.6 996.8 1000.8 1007.7 1014.9 1013.8 996.6 DAY 28 26 13 18 29 23 5 6 9 5 30 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 950.1 948.4 945.4 943.6 938.4 933.6 931.8 932.2 937.7 944.7 949.6 951.1 942.2 MAX. QFE PRESSURE IN HPA 954.5 954.0 948.3 946.8 943.3 936.2 935.6 935.3 944.0 951.3 952.7 956.0 956.0 DAY 2 4 26 27 23 16 1 23 27 29 15 30 MIN. QFE PRESSURE IN HPA 944.0 942.3 940.5 940.2 932.5 931.2 928.3 927.8 932.0 938.8 946.2 944.5 927.8 DAY 28 23 13 18 31 28 16 7 9 5 30 1 MEAN QNH PRESSURE IN HPA 1019.2 1017.3 1014.2 1012.3 1006.7 1001.7 999.8 1000.2 1006.1 1013.5 1018.6 1020.3 1010.8 MAX. QNH PRESSURE IN HPA 1023.8 1023.3 1017.3 1015.7 1012.0 1004.5 1003.8 1003.5 1012.7 1020.4 1021.9 1025.4 1025.4 DAY 2 4 26 27 23 16 1 23 27 29 15 30 MIN. QNH PRESSURE IN HPA 1012.7 1010.9 1009.0 1008.7 1000.5 999.2 996.1 995.6 1000.0 1007.2 1015.1 1013.2 995.6 DAY 28 23 13 18 31 28 16 7 9 5 30 1 MEAN QFF PRESSURE IN HPA 1018.7 1015.9 1012.0 1008.4 1001.5 995.6 993.9 994.3 1001.3 1009.8 1016.6 1019.6 1007.3 MAX. QFF PRESSURE IN HPA 1025.1 1023.0 1015.5 1012.6 1006.5 998.7 998.8 998.4 1009.1 1018.2 1020.2 1025.0 1025.1 DAY 30 4 10 27 10 16 1 24 27 29 15 30 MIN. QFF PRESSURE IN HPA 1012.1 1008.5 1006.5 1004.0 994.0 992.8 989.8 989.0 994.9 1002.8 1013.2 1011.9 989.0 DAY 28 23 13 19 31 28 16 7 9 5 10 1 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 15.2 19.0 24.5 30.0 36.0 38.6 38.8 38.2 31.5 26.8 23.2 18.7 28.4 MINIMUN AIR TEMPERATURE (C) 5.3 9.6 13.3 19.4 25.3 28.0 28.1 28.1 23.2 19.2 13.3 8.4 18.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 8 31 30 31 31 23 8 0 0 162 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 2 0 0 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS LOWEST(C) 0.0 3.0 8.0 15.0 21.0 26.0 24.0 26.0 19.0 14.0 10.0 3.0 0.0 DAY 26 4 3 5 2 7 7 8 10 30 19 23 MAXIMUM AIR TEMPERATURE (C) 21.2 25.2 30.6 35.9 42.3 45.4 45.3 44.2 38.2 33.4 29.8 25.7 34.8 DAYS WITH MAXIMUM TEMP. >=30 0 4 18 30 31 30 31 31 30 28 20 0 253 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.0 31.0 36.0 40.0 47.0 48.0 48.0 46.0 45.0 39.0 34.0 29.0 48.0 DAY 1 23 29 18 28 29 11 3 8 4 1 2 DIF. BETWEEN (MAX.-MIN.) (C) 15.9 15.6 17.3 16.5 17.0 17.4 17.2 16.1 15.0 14.2 16.5 17.3 16.4 MEAN DAILY TEMP. (MDT) (C) 13.2 17.4 22.0 27.6 33.8 36.7 36.7 36.1 30.7 26.3 21.5 17.1 26.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 5.0 56.0 199.0 397.0 471.0 486.5 468.5 290.0 163.5 22.5 0.5 2559.5 HEATING DEG. DAYS(BASE 18 0C) 148.0 45.0 2.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 41.0 236.5 DEWPOINT (MEAN C) -2.3 0.3 2.4 6.8 6.8 7.6 8.9 13.3 4.3 -1.6 8.3 2.0 4.7 MIXING RATIO (G/KG) 3.62 4.34 5.03 6.79 6.85 7.24 8.40 11.03 6.34 3.80 7.45 4.84 6.31 VAPOUR PRESSURE (HPA) 5.49 6.57 7.61 10.21 10.23 10.74 12.42 16.25 9.46 5.76 11.26 7.34 9.45 SATURATION DEF. (HPA) 12.84 16.71 24.99 34.05 51.47 59.78 58.98 52.83 39.02 30.95 18.39 15.43 34.62 RELATIVE HUMIDITY (MEAN %) 34 33 27 26 18 17 19 26 19 17 41 35 26 RELATIVE HUMIDITY (MAX. %) 55 53 42 41 33 29 35 45 27 24 59 50 41 RELATIVE HUMIDITY (MIN. %) 21 19 17 16 11 10 11 15 13 11 29 24 16 RELATIVE HUMIDITY (MEAN% 03UTC) 55 53 41 41 33 29 35 41 26 22 59 50 40 RELATIVE HUMIDITY (MEAN% 09UTC) 26 25 20 20 13 14 15 22 17 15 34 31 21 RELATIVE HUMIDITY (MEAN% 15UTC) 33 31 26 24 16 13 14 20 18 14 39 33 23 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 15.0 3.1 2.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 1.2 2.7 24.3 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 1 3 2 1 0 0 0 0 0 0 0 0 1 7 DAYS WITH PRECIPITATION 3 3 1 1 2 0 0 0 0 0 3 3 16 GREATEST DAILY PRECIPITATION 12.0 2.0 2.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.5 2.0 12.0 DAY 24 3 9 ** 17 ** ** ** ** ** 11 31 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 3 1 0 0 0 0 10 0 0 1 1 17 WIND DIRECTION (PREVAILING) 180 180 180 180 180 180 180 225 180 180 180 360 180 PREVAILING WIND SPEED(KNOTS) 6.9 10.8 8.8 8.1 7.5 6.9 9.1 6.2 7.1 8.2 7.9 6.7 8.1 PREVAILING WIND PERCENT 15.5 17.3 14.3 24.7 21.3 12.0 14.2 18.7 18.7 5.8 5.3 1.9 13.3 CALMS PERCENT OF WIND 71.0 62.6 67.5 62.7 73.5 81.3 66.5 52.9 72.0 87.7 88.0 96.8 73.6 NO. OF WIND OBSERVATION 155 139 154 150 155 150 155 155 150 155 150 155 1823 VECTOR WIND DIRECTION (MEAN) 198 189 206 184 183 173 236 224 201 214 208 329 201 VECTOR WIND MAGNITUDE(KNOTS) 1.1 1.9 1.4 2.4 1.9 1.0 1.9 2.0 1.6 0.6 0.7 0.1 1.3 WIND STEADINESES (MEAN %) 52.4 50.0 53.8 82.8 95.0 71.4 54.3 62.5 76.2 60.0 70.0 50.0 59.1 WIND SPEED (MEAN KNOTS) 2.1 3.8 2.6 2.9 2.0 1.4 3.5 3.2 2.1 1.0 1.0 0.2 2.2 FASTEST WIND DIRECTION 300 180 180 180 200 110 330 310 200 180 180 340 180 FASTEST WIND SPEED (KNOTS) 15 25 20 18 18 15 20 15 12 12 15 8 25 DAY 25 8 24 14 29 1 27 14 2 8 10 14 DAYS WITH SKY CLEAR (0-2)/8 22 21 23 17 21 26 30 29 30 29 17 22 287 DAYS WITH P.CLOUDY (3-6)/8 7 7 6 12 9 4 1 1 0 1 12 8 68 DAYS WITH CLOUDY (7-8)/8 2 0 2 1 1 0 0 1 0 1 1 1 10 DAYS WITH VISIBILITY =< 2 KM 0 1 1 0 0 0 1 0 0 0 0 0 3 DURATION OF SUNSHINE HOURS 275.8 258.3 275.2 252.9 273.7 246.9 259.7 266.2 301.1 304.2 258.1 271.2 3243.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 952.2 948.8 949.5 945.0 940.1 934.2 934.1 934.3 943.3 948.4 952.0 951.3 944.4 MAX. QFE PRESSURE IN HPA 961.1 957.3 956.7 950.2 946.4 939.1 938.8 942.6 949.8 954.5 958.9 956.9 961.1 DAY-HOUR 4- 6 4- 6 10- 6 9- 6 4- 6 15- 6 6- 6 25- 6 25- 6 23- 6 20- 6 31- 6 MIN. QFE PRESSURE IN HPA 945.4 942.7 939.5 939.8 932.8 928.3 929.2 926.0 936.1 939.6 945.9 944.4 926.0 DAY-HOUR 31-15 8-12 20-15 26-12 26-12 5-12 23-15 4- 9 1-15 6-15 8-12 21-12 MEAN QNH PRESSURE IN HPA 1021.4 1017.8 1018.6 1013.8 1008.6 1002.3 1002.2 1002.4 1011.9 1017.4 1021.2 1020.5 1013.2 MAX. QNH PRESSURE IN HPA 1030.8 1026.8 1026.2 1019.3 1015.3 1007.5 1007.2 1011.2 1018.9 1023.8 1028.5 1026.4 1030.8 DAY-HOUR 4- 6 4- 6 10- 6 9- 6 4- 6 15- 6 6- 6 25- 6 25- 6 23- 6 20- 6 31- 6 MIN. QNH PRESSURE IN HPA 1014.2 1011.3 1008.0 1008.3 1000.9 996.1 997.0 993.7 1004.4 1008.1 1014.7 1013.1 993.7 DAY-HOUR 31-15 8-12 20-15 26-12 26-12 5-12 23-15 4- 9 1-15 6-15 8-12 21-12 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 953.4 949.7 950.6 946.1 941.8 935.9 935.6 935.7 944.8 950.1 953.2 952.4 945.8 MAX. QFE PRESSURE IN HPA 960.9 956.6 954.9 949.0 945.4 938.3 938.4 941.4 949.0 954.0 958.4 956.0 960.9 DAY 4 4 10 9 4 15 6 25 25 23 20 31 MIN. QFE PRESSURE IN HPA 947.5 945.7 943.7 941.6 937.3 933.2 932.9 928.4 940.6 943.7 949.8 947.0 928.4 DAY 31 28 21 2 26 29 23 6 1 6 9 21 MEAN QNH PRESSURE IN HPA 1022.6 1018.8 1019.7 1014.9 1010.4 1004.1 1003.8 1003.9 1013.6 1019.2 1022.5 1021.7 1014.6 MAX. QNH PRESSURE IN HPA 1030.6 1026.1 1024.3 1018.0 1014.2 1006.7 1006.8 1010.0 1018.0 1023.3 1028.0 1025.4 1030.6 DAY 4 4 10 9 4 15 6 25 25 23 20 31 MIN. QNH PRESSURE IN HPA 1016.4 1014.5 1012.4 1010.2 1005.6 1001.3 1001.0 996.2 1009.1 1012.4 1018.9 1015.9 996.2 DAY 31 28 21 2 26 29 23 6 1 6 9 21 MEAN QFF PRESSURE IN HPA 1022.8 1018.0 1017.7 1011.3 1005.4 998.4 998.1 998.1 1009.3 1016.2 1020.6 1020.9 1011.4 MAX. QFF PRESSURE IN HPA 1031.2 1027.3 1023.6 1014.6 1010.3 1001.5 1001.4 1004.7 1014.7 1020.8 1026.3 1025.4 1031.2 DAY 4 4 10 10 4 16 6 27 25 23 20 31 MIN. QFF PRESSURE IN HPA 1017.0 1013.3 1009.3 1007.0 1000.1 995.3 995.1 990.2 1003.8 1007.9 1016.2 1013.9 990.2 DAY 31 28 21 2 27 5 23 6 1 6 9 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 954.6 951.0 951.8 947.1 942.4 936.3 936.0 935.7 945.4 950.7 954.2 953.4 946.6 MAX. QFE PRESSURE IN HPA 961.1 957.3 956.7 950.2 946.4 939.1 938.8 942.6 949.8 954.5 958.9 956.9 961.1 DAY 4 4 10 9 4 15 6 25 25 23 20 31 MIN. QFE PRESSURE IN HPA 948.2 947.3 944.8 944.7 937.6 933.5 933.0 926.2 940.1 944.5 950.7 947.4 926.2 DAY 31 28 21 2 26 5 23 6 2 6 8 21 MEAN QNH PRESSURE IN HPA 1024.0 1020.2 1021.0 1016.0 1011.0 1004.5 1004.3 1003.9 1014.2 1019.9 1023.5 1022.6 1015.4 MAX. QNH PRESSURE IN HPA 1030.8 1026.8 1026.2 1019.3 1015.3 1007.5 1007.2 1011.2 1018.9 1023.8 1028.5 1026.4 1030.8 DAY 4 4 10 9 4 15 6 25 25 23 20 31 MIN. QNH PRESSURE IN HPA 1017.2 1016.2 1013.6 1013.5 1005.9 1001.6 1001.1 993.9 1008.6 1013.2 1019.8 1016.3 993.9 DAY 31 28 21 2 26 5 23 6 2 6 8 21 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 952.3 949.3 950.1 945.9 940.9 934.9 934.6 934.5 943.8 948.7 952.4 951.6 944.9 MAX. QFE PRESSURE IN HPA 958.6 955.4 955.0 949.3 945.2 938.0 937.6 941.5 948.1 952.6 957.2 955.2 958.6 DAY 4 4 10 8 4 15 6 25 25 23 19 13 MIN. QFE PRESSURE IN HPA 947.0 946.1 943.0 942.9 936.2 931.9 931.4 926.0 938.9 942.9 948.6 945.5 926.0 DAY 31 28 20 2 26 5 23 4 4 6 8 21 MEAN QNH PRESSURE IN HPA 1021.5 1018.3 1019.2 1014.7 1009.5 1003.1 1002.7 1002.6 1012.5 1017.7 1021.6 1020.7 1013.7 MAX. QNH PRESSURE IN HPA 1028.2 1024.8 1024.4 1018.3 1014.0 1006.4 1005.9 1010.1 1017.1 1021.8 1026.7 1024.6 1028.2 DAY 4 4 10 8 4 15 6 25 25 23 19 13 MIN. QNH PRESSURE IN HPA 1015.9 1014.9 1011.7 1011.6 1004.5 999.9 999.4 993.7 1007.3 1011.6 1017.6 1014.3 993.7 DAY 31 28 20 2 26 5 23 4 4 6 8 21 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 950.3 946.9 947.6 943.0 937.8 932.0 932.3 932.9 941.3 946.3 950.2 949.6 942.5 MAX. QFE PRESSURE IN HPA 956.7 953.2 953.8 946.6 942.8 934.8 935.2 939.5 946.0 950.4 955.7 953.2 956.7 DAY 4 4 9 9 3 16 6 25 24 24 19 13 MIN. QFE PRESSURE IN HPA 946.0 942.7 939.8 939.8 932.8 928.3 929.5 927.0 936.7 939.8 945.9 944.4 927.0 DAY 31 8 20 26 26 5 23 8 1 6 8 21 MEAN QNH PRESSURE IN HPA 1019.4 1015.8 1016.6 1011.6 1006.2 1000.0 1000.3 1000.9 1009.8 1015.2 1019.2 1018.6 1011.1 MAX. QNH PRESSURE IN HPA 1026.2 1022.5 1023.1 1015.5 1011.4 1003.0 1003.4 1008.0 1014.8 1019.5 1025.1 1022.5 1026.2 DAY 4 4 9 9 3 16 6 25 24 24 19 13 MIN. QNH PRESSURE IN HPA 1014.8 1011.3 1008.3 1008.3 1000.9 996.1 997.4 994.7 1005.0 1008.3 1014.7 1013.1 994.7 DAY 31 8 20 26 26 5 23 8 1 6 8 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 950.4 947.0 947.6 943.0 937.7 931.8 932.1 932.7 941.2 946.3 950.2 949.7 942.5 MAX. QFE PRESSURE IN HPA 955.9 953.2 952.7 946.8 942.8 935.0 935.4 939.1 945.9 950.6 955.8 953.3 955.9 DAY 4 4 9 9 3 16 6 25 24 24 20 13 MIN. QFE PRESSURE IN HPA 945.4 942.7 939.5 939.8 932.9 928.5 929.2 927.8 936.1 939.6 945.9 944.6 927.8 DAY 31 8 20 26 27 29 23 6 1 6 8 20 MEAN QNH PRESSURE IN HPA 1019.5 1015.9 1016.5 1011.6 1006.0 999.8 1000.1 1000.8 1009.8 1015.2 1019.3 1018.7 1011.1 MAX. QNH PRESSURE IN HPA 1025.3 1022.5 1021.9 1015.7 1011.4 1003.2 1003.6 1007.5 1014.7 1019.7 1025.2 1022.6 1025.3 DAY 4 4 9 9 3 16 6 25 24 24 20 13 MIN. QNH PRESSURE IN HPA 1014.2 1011.3 1008.0 1008.3 1001.0 996.3 997.0 995.6 1004.4 1008.1 1014.7 1013.4 995.6 DAY 31 8 20 26 27 29 23 6 1 6 8 20 MEAN QFF PRESSURE IN HPA 1019.6 1015.0 1014.4 1008.0 1001.1 994.1 994.4 995.0 1005.5 1012.1 1017.4 1017.9 1007.9 MAX. QFF PRESSURE IN HPA 1025.8 1023.2 1021.2 1012.3 1007.7 998.1 998.0 1002.3 1011.8 1017.4 1023.5 1021.5 1025.8 DAY 4 4 9 9 3 16 6 28 26 24 20 13 MIN. QFF PRESSURE IN HPA 1014.3 1009.6 1004.6 1004.1 995.2 990.3 991.4 989.5 999.1 1003.4 1012.1 1010.8 989.5 DAY 31 8 20 25 27 5 23 6 1 6 8 20 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 13.9 13.0 20.1 26.5 34.9 40.5 39.7 36.7 32.2 29.7 24.2 15.7 27.3 MINIMUN AIR TEMPERATURE (C) 6.7 5.2 12.2 15.6 28.5 33.6 29.6 26.5 20.9 16.3 11.5 4.0 17.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 31 30 31 31 18 1 0 0 142 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH FREEZING MIN.<= 0 0 2 0 0 0 0 0 0 0 0 0 6 8 TEMPERATURE RECORDS LOWEST(C) 1.0 0.0 5.0 13.0 21.0 30.0 23.0 23.0 16.0 13.0 3.0 -6.0 -6.0 DAY 6 6 1 22 1 3 19 28 25 28 25 27 MAXIMUM AIR TEMPERATURE (C) 19.4 19.2 27.2 33.9 40.7 45.5 45.3 44.3 39.7 36.9 30.6 21.7 33.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 10 28 31 30 31 31 30 31 19 0 241 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 26.0 34.0 38.0 45.0 49.0 49.0 46.0 45.0 39.0 35.0 28.0 49.0 DAY 15 9 23 11 29 20 6 5 12 2 2 5 DIF. BETWEEN (MAX.-MIN.) (C) 12.7 14.0 15.0 18.3 12.2 11.9 15.7 17.8 18.8 20.6 19.1 17.7 16.2 MEAN DAILY TEMP. (MDT) (C) 13.0 12.2 19.7 24.8 34.6 39.6 37.5 35.4 30.3 26.6 21.1 12.8 25.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 29.0 115.0 421.0 557.0 510.5 445.0 279.0 174.0 49.5 0.0 2580.0 HEATING DEG. DAYS(BASE 18 0C) 154.0 168.5 23.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16.0 161.5 523.0 DEWPOINT (MEAN C) 6.4 0.1 6.1 6.6 10.7 11.3 12.0 12.3 7.7 3.1 6.1 1.4 7.0 MIXING RATIO (G/KG) 6.76 4.26 6.72 6.84 8.84 9.24 9.79 10.48 7.38 5.35 6.45 4.92 7.25 VAPOUR PRESSURE (HPA) 10.22 6.48 10.13 10.27 13.18 13.69 14.47 15.48 11.04 8.06 9.75 7.46 10.85 SATURATION DEF. (HPA) 6.20 9.44 14.84 26.28 43.86 63.11 60.16 48.70 39.76 35.66 22.17 11.65 31.82 RELATIVE HUMIDITY (MEAN %) 64 44 46 32 24 18 21 26 23 20 33 41 33 RELATIVE HUMIDITY (MAX. %) 81 64 64 52 29 22 31 41 30 32 46 57 46 RELATIVE HUMIDITY (MIN. %) 48 30 31 18 15 14 14 14 17 14 23 29 22 RELATIVE HUMIDITY (MEAN% 03UTC) 80 61 56 49 28 20 30 28 27 32 46 56 43 RELATIVE HUMIDITY (MEAN% 09UTC) 59 38 40 26 22 17 17 24 21 17 28 34 29 RELATIVE HUMIDITY (MEAN% 15UTC) 64 41 48 33 26 18 18 25 21 18 34 42 32 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 85.1 3.0 48.9 3.3 0.0 11.2 0.0 0.0 0.0 0.0 0.1 1.2 152.8 DAYS WITH PRECIPITATION >=10 2 0 1 0 0 1 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 6 0 4 0 0 1 0 0 0 0 0 0 11 DAYS WITH PRECIPITATION >= 1 10 2 8 1 0 1 0 0 0 0 0 1 23 DAYS WITH PRECIPITATION 11 2 9 6 0 2 0 0 0 0 2 3 35 GREATEST DAILY PRECIPITATION 33.6 2.0 17.0 2.0 0.0 11.0 0.0 0.0 0.0 0.0 0.1 1.0 33.6 DAY 30 4 10 3 ** 26 ** ** ** ** 21 6 DAY WITH THUNDER STORM 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 0 0 1 0 0 1 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 270 180 180 180 180 180 315 225 135 135 225 225 180 PREVAILING WIND SPEED(KNOTS) 6.7 10.0 8.2 8.9 7.3 6.3 9.4 6.6 6.2 5.6 6.2 7.8 7.7 PREVAILING WIND PERCENT 1.9 4.8 9.0 6.0 10.3 4.7 12.9 5.2 8.0 5.8 8.0 9.7 4.8 CALMS PERCENT OF WIND 95.5 89.7 80.6 83.3 83.9 88.0 65.2 83.9 77.3 87.1 76.0 80.0 82.5 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 219 230 211 214 193 169 271 204 163 153 269 253 223 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.8 1.5 0.8 1.0 0.4 2.3 0.7 1.0 0.5 0.7 1.0 0.7 WIND STEADINESES (MEAN %) 66.7 72.7 83.3 50.0 90.9 44.4 74.2 63.6 76.9 71.4 46.7 62.5 50.0 WIND SPEED (MEAN KNOTS) 0.3 1.1 1.8 1.6 1.1 0.9 3.1 1.1 1.3 0.7 1.5 1.6 1.4 FASTEST WIND DIRECTION 270 280 270 310 210 30 200 270 210 180 270 240 30 FASTEST WIND SPEED (KNOTS) 10 15 15 18 15 20 18 15 10 9 12 18 20 DAY 12 12 2 16 10 26 5 5 14 14 22 22 DAYS WITH SKY CLEAR (0-2)/8 9 24 10 12 23 27 25 29 27 26 23 18 253 DAYS WITH P.CLOUDY (3-6)/8 11 4 14 11 8 3 4 2 3 5 7 9 81 DAYS WITH CLOUDY (7-8)/8 11 1 7 7 0 0 2 0 0 0 0 4 32 DAYS WITH VISIBILITY =< 2 KM 1 0 1 0 0 0 0 0 0 0 0 0 2 DURATION OF SUNSHINE HOURS 161.8 278.1 182.0 238.0 300.2 ****** 272.4 305.3 194.9 300.4 280.8 239.1 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 952.3 952.6 948.7 945.5 941.7 936.2 935.2 936.1 943.3 947.0 951.1 953.5 945.3 MAX. QFE PRESSURE IN HPA 961.5 961.7 956.1 950.5 949.9 945.4 939.1 945.6 950.0 951.8 956.7 964.0 964.0 DAY-HOUR 9- 6 25- 6 18- 6 17- 6 25- 6 2- 6 24- 6 29- 6 23- 6 3- 6 23- 6 28- 6 MIN. QFE PRESSURE IN HPA 941.1 944.4 942.7 940.2 935.3 929.6 930.3 928.3 936.4 941.6 946.6 947.3 928.3 DAY-HOUR 30-12 20-15 26-12 25-12 21-12 23-12 6-12 7-15 4-12 2-12 17-12 17-12 MEAN QNH PRESSURE IN HPA 1021.5 1021.9 1017.7 1014.3 1010.3 1004.4 1003.4 1004.4 1011.9 1015.8 1020.2 1022.8 1014.0 MAX. QNH PRESSURE IN HPA 1031.2 1031.5 1025.5 1019.6 1019.0 1014.2 1007.5 1014.4 1019.1 1021.0 1026.2 1033.9 1033.9 DAY-HOUR 9- 6 25- 6 18- 6 17- 6 25- 6 2- 6 24- 6 29- 6 23- 6 3- 6 23- 6 28- 6 MIN. QNH PRESSURE IN HPA 1009.6 1013.1 1011.3 1008.7 1003.5 997.5 998.2 996.1 1004.7 1010.2 1015.5 1016.2 996.1 DAY-HOUR 30-12 20-15 26-12 25-12 21-12 23-12 6-12 7-15 4-12 2-12 17-12 17-12 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 953.1 954.0 949.7 946.9 943.4 938.0 936.9 938.0 945.2 949.5 952.2 954.5 946.8 MAX. QFE PRESSURE IN HPA 959.6 961.2 955.1 949.6 949.4 944.6 939.0 944.8 949.9 951.7 956.0 962.8 962.8 DAY 9 25 18 17 25 2 21 27 23 3 24 28 MIN. QFE PRESSURE IN HPA 943.0 947.0 945.9 944.1 939.3 933.9 934.7 933.3 940.8 946.9 949.6 949.5 933.3 DAY 30 10 26 3 21 23 6 7 4 2 17 7 MEAN QNH PRESSURE IN HPA 1022.4 1023.3 1018.8 1015.8 1012.1 1006.3 1005.2 1006.4 1014.0 1018.5 1021.4 1023.9 1015.7 MAX. QNH PRESSURE IN HPA 1029.2 1030.9 1024.5 1018.6 1018.4 1013.4 1007.4 1013.6 1019.0 1020.9 1025.4 1032.6 1032.6 DAY 9 25 18 17 25 2 21 27 23 3 24 28 MIN. QNH PRESSURE IN HPA 1011.7 1015.9 1014.7 1012.8 1007.7 1002.0 1002.9 1001.4 1009.3 1015.8 1018.6 1018.5 1001.4 DAY 30 10 26 3 21 23 6 7 4 2 17 7 MEAN QFF PRESSURE IN HPA 1022.4 1023.7 1017.5 1013.2 1007.2 1000.2 999.2 1001.1 1010.0 1015.1 1019.5 1023.9 1012.7 MAX. QFF PRESSURE IN HPA 1030.0 1031.9 1023.0 1017.7 1014.0 1007.9 1001.7 1009.4 1015.8 1016.9 1025.0 1035.4 1035.4 DAY 9 25 18 17 25 2 19 29 23 27 24 28 MIN. QFF PRESSURE IN HPA 1010.6 1014.5 1011.9 1009.5 1001.8 995.6 996.4 995.1 1005.4 1011.8 1016.2 1017.5 995.1 DAY 30 21 26 30 21 23 6 7 4 1 17 7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 954.2 955.0 950.5 947.6 944.1 938.5 937.2 938.3 945.7 949.8 953.2 955.6 947.5 MAX. QFE PRESSURE IN HPA 961.5 961.7 956.1 950.5 949.9 945.4 939.1 945.6 950.0 951.8 956.7 964.0 964.0 DAY 9 25 18 17 25 2 24 29 23 3 23 28 MIN. QFE PRESSURE IN HPA 944.0 947.9 945.7 944.5 940.0 934.0 934.7 933.3 941.6 947.0 950.5 951.4 933.3 DAY 30 10 2 3 21 23 6 7 4 1 17 18 MEAN QNH PRESSURE IN HPA 1023.5 1024.3 1019.6 1016.6 1012.9 1006.9 1005.5 1006.7 1014.5 1018.9 1022.4 1025.0 1016.4 MAX. QNH PRESSURE IN HPA 1031.2 1031.5 1025.5 1019.6 1019.0 1014.2 1007.5 1014.4 1019.1 1021.0 1026.2 1033.9 1033.9 DAY 9 25 18 17 25 2 24 29 23 3 23 28 MIN. QNH PRESSURE IN HPA 1012.7 1016.8 1014.5 1013.2 1008.5 1002.1 1002.9 1001.4 1010.2 1015.9 1019.6 1020.6 1001.4 DAY 30 10 2 3 21 23 6 7 4 1 17 18 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 952.4 952.9 948.7 945.5 941.7 936.2 935.3 936.1 943.2 947.1 951.6 953.9 945.4 MAX. QFE PRESSURE IN HPA 959.4 959.0 955.1 949.2 947.6 942.2 937.3 943.8 947.9 949.3 955.5 962.5 962.5 DAY 9 25 18 17 25 2 21 29 23 3 23 27 MIN. QFE PRESSURE IN HPA 942.2 945.9 944.1 942.2 937.4 931.6 932.5 931.2 938.6 943.6 948.5 949.7 931.2 DAY 30 10 9 25 21 23 6 7 4 2 15 22 MEAN QNH PRESSURE IN HPA 1021.6 1022.1 1017.7 1014.3 1010.3 1004.4 1003.5 1004.3 1011.9 1015.9 1020.7 1023.2 1014.2 MAX. QNH PRESSURE IN HPA 1029.0 1028.6 1024.5 1018.2 1016.5 1010.8 1005.6 1012.5 1016.8 1018.3 1024.9 1032.3 1032.3 DAY 9 25 18 17 25 2 21 29 23 3 23 27 MIN. QNH PRESSURE IN HPA 1010.8 1014.7 1012.8 1010.8 1005.7 999.6 1000.5 999.2 1007.0 1012.3 1017.5 1018.8 999.2 DAY 30 10 9 25 21 23 6 7 4 2 15 22 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 950.7 950.7 947.2 943.6 939.4 934.0 933.3 934.0 940.8 944.1 949.3 951.6 943.2 MAX. QFE PRESSURE IN HPA 956.3 956.0 955.1 946.4 944.9 940.9 935.3 942.0 945.7 946.5 953.1 959.8 959.8 DAY 9 24 18 16 25 5 18 29 23 3 23 27 MIN. QFE PRESSURE IN HPA 941.1 944.5 942.7 940.2 935.3 929.6 930.3 928.4 936.4 941.6 946.6 947.3 928.4 DAY 30 20 26 25 21 23 6 7 4 2 17 17 MEAN QNH PRESSURE IN HPA 1019.8 1019.9 1016.1 1012.3 1007.9 1002.1 1001.4 1002.1 1009.4 1012.8 1018.3 1020.8 1011.9 MAX. QNH PRESSURE IN HPA 1025.7 1025.4 1024.5 1015.3 1013.7 1009.4 1003.5 1010.6 1014.5 1015.4 1022.4 1029.4 1029.4 DAY 9 24 18 16 25 5 18 29 23 3 23 27 MIN. QNH PRESSURE IN HPA 1009.6 1013.2 1011.3 1008.7 1003.5 997.5 998.2 996.2 1004.7 1010.2 1015.5 1016.2 996.2 DAY 30 20 26 25 21 23 6 7 4 2 17 17 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 950.9 950.8 947.3 943.9 939.8 934.3 933.2 934.4 941.4 944.4 949.4 951.8 943.5 MAX. QFE PRESSURE IN HPA 956.4 956.2 954.9 946.5 945.3 941.1 935.4 942.8 946.1 947.4 953.1 959.9 959.9 DAY 8 24 18 16 25 5 18 29 23 31 23 27 MIN. QFE PRESSURE IN HPA 942.0 944.4 942.9 940.5 935.5 929.8 930.7 928.3 936.8 941.9 946.8 947.3 928.3 DAY 30 20 26 25 21 23 5 7 4 2 17 17 MEAN QNH PRESSURE IN HPA 1020.0 1019.9 1016.3 1012.6 1008.3 1002.4 1001.3 1002.6 1010.0 1013.1 1018.4 1021.0 1012.2 MAX. QNH PRESSURE IN HPA 1025.8 1025.6 1024.3 1015.4 1014.1 1009.6 1003.6 1011.4 1014.9 1016.3 1022.4 1029.6 1029.6 DAY 8 24 18 16 25 5 18 29 23 31 23 27 MIN. QNH PRESSURE IN HPA 1010.6 1013.1 1011.6 1009.0 1003.7 997.7 998.6 996.1 1005.1 1010.5 1015.7 1016.2 996.1 DAY 30 20 26 25 21 23 5 7 4 2 17 17 MEAN QFF PRESSURE IN HPA 1020.0 1020.3 1014.9 1009.9 1003.3 996.3 995.3 997.2 1005.8 1009.7 1016.4 1020.9 1009.2 MAX. QFF PRESSURE IN HPA 1026.8 1026.6 1022.5 1013.7 1009.6 1003.7 997.9 1007.3 1011.6 1013.6 1021.6 1032.5 1032.5 DAY 9 24 18 16 25 5 18 29 23 31 23 27 MIN. QFF PRESSURE IN HPA 1009.8 1012.1 1008.9 1005.8 998.1 991.3 991.7 990.1 1000.6 1006.7 1013.1 1015.7 990.1 DAY 30 20 26 25 21 23 6 7 4 2 17 17 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.1 20.2 24.9 31.2 36.5 40.9 37.8 39.0 36.0 30.0 22.2 17.4 28.9 MINIMUN AIR TEMPERATURE (C) 3.4 10.4 14.5 19.9 24.0 31.7 30.0 28.4 25.1 17.2 9.8 7.1 18.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 13 28 30 31 31 29 5 0 0 167 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 0 7 TEMPERATURE RECORDS LOWEST(C) -2.0 3.0 4.0 15.0 20.0 22.0 24.0 25.0 20.0 12.0 5.0 1.0 -2.0 DAY 5 1 11 15 1 12 19 21 16 2 11 25 MAXIMUM AIR TEMPERATURE (C) 16.9 27.2 31.7 37.4 42.9 46.3 43.2 45.0 41.8 36.5 29.1 23.2 35.1 DAYS WITH MAXIMUM TEMP. >=30 0 8 24 30 31 30 31 31 30 31 16 0 262 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.0 32.0 37.0 43.0 45.0 49.0 48.0 47.0 45.0 41.0 35.0 27.0 49.0 DAY 31 17 23 30 11 4 11 14 7 11 2 3 DIF. BETWEEN (MAX.-MIN.) (C) 13.5 16.8 17.2 17.5 18.9 14.6 13.2 16.6 16.7 19.3 19.3 16.1 16.6 MEAN DAILY TEMP. (MDT) (C) 10.1 18.8 23.1 28.6 33.5 39.0 36.6 36.7 33.5 26.8 19.4 15.1 26.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 9.5 86.5 229.5 386.0 540.5 484.0 486.0 374.0 181.0 20.5 0.0 2797.5 HEATING DEG. DAYS(BASE 18 0C) 243.5 25.5 9.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15.5 92.0 386.0 DEWPOINT (MEAN C) -0.9 2.1 4.5 6.2 9.1 23.3 21.8 18.0 11.3 4.3 -1.7 1.7 8.3 MIXING RATIO (G/KG) 3.98 4.97 5.91 6.65 8.14 20.13 18.93 14.42 9.53 5.69 3.86 4.88 8.92 VAPOUR PRESSURE (HPA) 6.06 7.52 8.92 9.98 12.15 29.27 27.51 21.19 14.18 8.58 5.85 7.41 13.22 SATURATION DEF. (HPA) 7.98 17.50 24.44 37.84 51.41 50.33 40.04 50.95 47.65 36.52 22.94 13.53 33.43 RELATIVE HUMIDITY (MEAN %) 49 33 29 24 21 38 44 32 25 21 22 38 31 RELATIVE HUMIDITY (MAX. %) 71 48 45 40 33 48 66 49 41 32 32 60 47 RELATIVE HUMIDITY (MIN. %) 35 20 19 15 14 31 30 21 16 15 16 26 22 RELATIVE HUMIDITY (MEAN% 03UTC) 68 46 45 40 31 46 65 48 39 33 30 59 46 RELATIVE HUMIDITY (MEAN% 09UTC) 40 28 25 19 17 36 38 27 19 17 19 28 26 RELATIVE HUMIDITY (MEAN% 15UTC) 49 33 27 19 19 36 43 25 20 19 21 37 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 60.0 0.0 0.6 0.0 0.0 27.0 62.0 0.0 0.0 0.0 0.0 0.0 149.6 DAYS WITH PRECIPITATION >=10 2 0 0 0 0 1 3 0 0 0 0 0 6 DAYS WITH PRECIPITATION >= 5 2 0 0 0 0 1 3 0 0 0 0 0 6 DAYS WITH PRECIPITATION >= 1 3 0 0 0 0 1 6 0 0 0 0 0 10 DAYS WITH PRECIPITATION 3 0 1 0 0 2 11 0 0 0 0 0 17 GREATEST DAILY PRECIPITATION 43.0 0.0 0.6 0.0 0.0 27.0 30.0 0.0 0.0 0.0 0.0 0.0 43.0 DAY 3 ** 16 ** ** 12 19 ** ** ** ** ** DAY WITH THUNDER STORM 0 0 0 0 0 0 6 0 0 0 0 0 6 DAYS WITH SNOW OR SLEET 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 0 2 1 1 0 3 10 5 0 0 0 0 22 WIND DIRECTION (PREVAILING) 225 225 180 225 225 225 225 225 180 180 180 225 225 PREVAILING WIND SPEED(KNOTS) 8.6 8.6 7.6 10.1 9.7 10.8 7.2 7.4 6.9 6.4 8.8 7.0 8.6 PREVAILING WIND PERCENT 6.5 9.3 10.3 10.7 3.9 7.3 19.4 9.0 14.7 3.2 6.0 2.6 7.2 CALMS PERCENT OF WIND 80.6 80.0 76.1 81.3 94.2 89.3 58.7 78.7 73.3 93.5 93.3 94.8 82.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 154 1824 VECTOR WIND DIRECTION (MEAN) 231 223 219 204 203 201 194 231 219 208 190 211 211 VECTOR WIND MAGNITUDE(KNOTS) 0.7 1.2 1.7 1.5 0.4 1.2 2.1 1.1 1.1 0.3 0.5 0.3 1.0 WIND STEADINESES (MEAN %) 41.2 66.7 77.3 100.0 80.0 92.3 63.6 68.7 52.4 75.0 83.3 75.0 71.4 WIND SPEED (MEAN KNOTS) 1.7 1.8 2.2 1.5 0.5 1.3 3.3 1.6 2.1 0.4 0.6 0.4 1.4 FASTEST WIND DIRECTION 330 210 320 220 210 180 180 210 330 200 180 210 210 FASTEST WIND SPEED (KNOTS) 15 20 18 18 12 20 20 15 15 10 15 10 20 DAY 19 23 10 2 5 8 2 6 30 24 7 10 DAYS WITH SKY CLEAR (0-2)/8 19 15 25 21 31 28 18 29 29 31 29 23 298 DAYS WITH P.CLOUDY (3-6)/8 10 11 5 9 0 1 9 2 1 0 1 8 57 DAYS WITH CLOUDY (7-8)/8 2 2 1 0 0 1 4 0 0 0 0 0 10 DAYS WITH VISIBILITY =< 2 KM 2 2 1 1 0 4 4 0 0 0 0 0 14 DURATION OF SUNSHINE HOURS 242.3 208.7 232.7 238.6 301.2 215.9 225.4 292.7 302.1 326.1 295.1 242.0 3122.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 954.5 950.1 948.9 944.9 941.8 934.9 934.9 936.6 941.8 947.9 950.7 953.4 945.0 MAX. QFE PRESSURE IN HPA 963.6 959.4 958.6 951.2 948.2 944.0 943.8 941.0 950.6 953.8 957.7 963.0 963.6 DAY-HOUR 6- 6 7- 3 11- 6 1- 6 8- 6 3- 6 22- 6 31- 6 29- 6 31- 6 12- 6 25- 6 MIN. QFE PRESSURE IN HPA 947.5 940.3 941.5 939.1 936.7 926.4 923.8 931.1 935.7 943.1 943.0 943.2 923.8 DAY-HOUR 18-12 23-15 9-12 23-15 2-15 15-12 5-15 5-15 1-15 11-15 3-15 7-15 MEAN QNH PRESSURE IN HPA 1023.9 1019.2 1017.9 1013.6 1010.4 1003.0 1003.1 1004.8 1010.3 1016.8 1019.8 1022.7 1013.8 MAX. QNH PRESSURE IN HPA 1033.5 1029.0 1028.2 1020.3 1017.2 1012.7 1012.5 1009.5 1019.7 1023.1 1027.2 1032.8 1033.5 DAY-HOUR 6- 6 7- 3 11- 6 1- 6 8- 6 3- 6 22- 6 31- 6 29- 6 31- 6 12- 6 25- 6 MIN. QNH PRESSURE IN HPA 1016.4 1008.8 1010.1 1007.5 1005.0 994.1 991.3 999.1 1003.9 1011.8 1011.7 1011.9 991.3 DAY-HOUR 18-12 23-15 9-12 23-15 2-15 15-12 5-15 5-15 1-15 11-15 3-15 7-15 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 955.6 951.6 950.1 946.4 943.6 936.6 936.3 938.1 943.1 949.5 952.8 955.1 946.6 MAX. QFE PRESSURE IN HPA 962.0 959.4 958.5 950.6 947.5 943.1 941.4 940.3 949.2 953.2 957.2 962.6 962.6 DAY 26 7 11 3 8 3 22 31 28 30 12 25 MIN. QFE PRESSURE IN HPA 949.6 943.6 943.9 942.3 940.8 929.0 931.3 935.3 939.5 946.7 948.2 948.8 929.0 DAY 14 26 30 23 12 16 5 5 2 13 20 7 MEAN QNH PRESSURE IN HPA 1025.0 1020.8 1019.2 1015.3 1012.3 1004.9 1004.6 1006.5 1011.8 1018.5 1022.0 1024.4 1015.4 MAX. QNH PRESSURE IN HPA 1031.8 1029.0 1028.1 1019.7 1016.4 1011.8 1010.0 1008.8 1018.2 1022.5 1026.7 1032.4 1032.4 DAY 26 7 11 3 8 3 22 31 28 30 12 25 MIN. QNH PRESSURE IN HPA 1018.6 1012.3 1012.6 1010.9 1009.3 996.8 999.3 1003.5 1008.0 1015.6 1017.2 1017.8 996.8 DAY 14 26 30 23 12 16 5 5 2 13 20 7 MEAN QFF PRESSURE IN HPA 1026.0 1019.7 1016.9 1011.5 1007.4 998.4 998.5 1000.5 1006.7 1015.2 1020.7 1024.1 1012.1 MAX. QFF PRESSURE IN HPA 1034.1 1028.6 1028.5 1016.5 1012.1 1005.0 1005.3 1003.2 1014.5 1020.2 1026.8 1033.0 1034.1 DAY 6 7 11 1 8 3 22 31 30 30 12 25 MIN. QFF PRESSURE IN HPA 1018.3 1010.5 1009.5 1006.4 1004.1 990.3 993.4 997.0 1002.6 1011.1 1014.9 1016.0 990.3 DAY 14 26 30 23 12 16 5 5 2 13 4 7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 956.7 952.3 951.0 947.1 944.1 937.2 936.9 938.7 944.2 950.3 953.2 955.8 947.3 MAX. QFE PRESSURE IN HPA 963.6 959.4 958.6 951.2 948.2 944.0 943.8 941.0 950.6 953.8 957.7 963.0 963.6 DAY 6 7 11 1 8 3 22 31 29 31 12 25 MIN. QFE PRESSURE IN HPA 950.2 944.9 945.8 943.1 941.4 929.7 932.1 935.8 940.1 947.5 948.8 949.4 929.7 DAY 14 26 8 23 12 16 5 5 2 11 3 7 MEAN QNH PRESSURE IN HPA 1026.1 1021.5 1020.2 1016.0 1012.8 1005.5 1005.2 1007.1 1012.9 1019.4 1022.5 1025.2 1016.2 MAX. QNH PRESSURE IN HPA 1033.5 1029.0 1028.2 1020.3 1017.2 1012.7 1012.5 1009.5 1019.7 1023.1 1027.2 1032.8 1033.5 DAY 6 7 11 1 8 3 22 31 29 31 12 25 MIN. QNH PRESSURE IN HPA 1019.3 1013.7 1014.6 1011.8 1010.0 997.6 1000.1 1004.0 1008.6 1016.4 1017.8 1018.4 997.6 DAY 14 26 8 23 12 16 5 5 2 11 3 7 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 954.7 950.3 949.4 945.2 942.2 935.2 935.5 937.0 942.4 948.1 950.8 953.7 945.4 MAX. QFE PRESSURE IN HPA 960.6 958.0 957.0 949.4 946.2 942.1 942.2 938.8 948.7 952.5 956.7 961.3 961.3 DAY 26 7 11 2 8 3 22 31 28 31 12 27 MIN. QFE PRESSURE IN HPA 948.9 943.9 944.4 941.7 939.8 928.3 929.8 934.3 939.0 944.9 946.1 946.6 928.3 DAY 14 26 8 24 12 16 5 5 2 13 3 7 MEAN QNH PRESSURE IN HPA 1024.1 1019.4 1018.5 1014.0 1010.8 1003.4 1003.7 1005.3 1011.0 1017.1 1019.9 1022.9 1014.2 MAX. QNH PRESSURE IN HPA 1030.3 1027.5 1026.5 1018.4 1015.1 1010.7 1010.8 1007.2 1017.7 1021.7 1026.2 1031.0 1031.0 DAY 26 7 11 2 8 3 22 31 28 31 12 27 MIN. QNH PRESSURE IN HPA 1017.9 1012.6 1013.1 1010.3 1008.3 996.1 997.7 1002.4 1007.4 1013.7 1014.9 1015.5 996.1 DAY 14 26 8 24 12 16 5 5 2 13 3 7 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 952.7 948.0 946.9 942.9 939.9 932.7 933.0 934.7 939.8 945.9 948.4 951.4 943.0 MAX. QFE PRESSURE IN HPA 959.2 955.8 953.9 949.0 943.2 939.0 939.8 936.7 946.5 949.4 953.7 958.9 959.2 DAY 6 7 10 2 8 3 22 24 30 21 12 27 MIN. QFE PRESSURE IN HPA 947.5 941.8 941.5 939.7 937.1 926.4 924.6 932.1 936.4 943.2 943.2 944.0 924.6 DAY 18 23 9 24 2 15 5 5 1 10 19 7 MEAN QNH PRESSURE IN HPA 1022.0 1017.0 1015.8 1011.6 1008.4 1000.8 1001.1 1002.8 1008.3 1014.7 1017.4 1020.6 1011.7 MAX. QNH PRESSURE IN HPA 1028.8 1025.2 1023.2 1018.0 1011.9 1007.4 1008.3 1005.0 1015.4 1018.4 1023.0 1028.5 1028.8 DAY 6 7 10 2 8 3 22 24 30 21 12 27 MIN. QNH PRESSURE IN HPA 1016.4 1010.4 1010.1 1008.2 1005.4 994.1 992.2 1000.1 1004.7 1011.9 1011.9 1012.7 992.2 DAY 18 23 9 24 2 15 5 5 1 10 19 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 953.1 948.5 947.1 942.7 939.5 932.7 932.8 934.3 939.3 945.7 948.3 951.1 942.9 MAX. QFE PRESSURE IN HPA 959.6 955.8 954.3 949.0 942.9 939.0 938.5 936.7 945.9 949.4 953.2 958.5 959.6 DAY 6 7 11 2 8 3 22 29 29 21 12 27 MIN. QFE PRESSURE IN HPA 947.5 940.3 941.7 939.1 936.7 926.5 923.8 931.1 935.7 943.1 943.0 943.2 923.8 DAY 18 23 8 23 2 15 5 5 1 11 3 7 MEAN QNH PRESSURE IN HPA 1022.3 1017.4 1016.0 1011.4 1008.0 1000.7 1000.9 1002.5 1007.8 1014.5 1017.3 1020.2 1011.6 MAX. QNH PRESSURE IN HPA 1029.2 1025.2 1023.6 1018.0 1011.6 1007.4 1006.9 1005.0 1014.7 1018.4 1022.5 1028.1 1029.2 DAY 6 7 11 2 8 3 22 29 29 21 12 27 MIN. QNH PRESSURE IN HPA 1016.4 1008.8 1010.3 1007.5 1005.0 994.2 991.3 999.1 1003.9 1011.8 1011.7 1011.9 991.3 DAY 18 23 8 23 2 15 5 5 1 11 3 7 MEAN QFF PRESSURE IN HPA 1023.3 1016.2 1013.7 1007.5 1003.0 994.0 994.9 996.5 1002.7 1011.2 1015.9 1019.8 1008.2 MAX. QFF PRESSURE IN HPA 1031.6 1024.7 1024.0 1014.8 1007.2 1000.5 1002.1 999.6 1010.9 1015.7 1022.4 1029.2 1031.6 DAY 6 7 11 2 8 3 21 29 30 21 12 27 MIN. QFF PRESSURE IN HPA 1016.2 1006.9 1007.8 1002.8 999.8 987.6 985.2 992.6 998.6 1007.3 1009.0 1010.3 985.2 DAY 14 23 8 30 12 15 5 5 1 11 3 7 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 13.7 ***** ***** 31.0 36.0 38.8 ***** 39.3 36.0 27.7 23.7 17.4 ***** MINIMUN AIR TEMPERATURE (C) 6.1 7.6 15.4 18.8 23.0 27.1 29.1 29.0 25.8 14.9 11.7 9.2 18.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 11 25 30 31 31 30 2 0 0 160 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 2.0 2.0 8.0 13.0 17.0 24.0 26.0 25.0 22.0 10.0 7.0 2.0 2.0 DAY 6 5 10 2 2 17 8 16 28 16 19 4 MAXIMUM AIR TEMPERATURE (C) 19.2 18.0 30.6 36.3 40.9 44.5 45.4 45.5 41.9 34.3 30.4 22.5 34.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 19 29 31 30 31 31 30 31 17 0 249 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.0 27.0 38.0 41.0 45.0 47.0 48.0 49.0 44.0 37.0 35.0 25.0 49.0 DAY 9 28 23 23 31 30 2 11 8 1 6 5 DIF. BETWEEN (MAX.-MIN.) (C) 13.1 10.4 15.2 17.5 17.9 17.4 16.3 16.5 16.1 19.4 18.7 13.3 16.0 MEAN DAILY TEMP. (MDT) (C) 12.6 12.8 23.0 27.6 32.0 35.8 37.2 37.3 33.8 24.6 21.0 15.9 26.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 79.5 197.0 340.5 443.5 503.5 504.5 385.5 111.0 30.0 0.0 2595.0 HEATING DEG. DAYS(BASE 18 0C) 166.5 147.5 1.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 70.0 386.5 DEWPOINT (MEAN C) 3.2 ***** ***** 4.0 9.5 10.9 ***** 12.3 12.7 8.9 5.1 4.5 ***** MIXING RATIO (G/KG) 5.25 ****** ****** 5.55 8.32 9.10 ****** 10.10 10.07 7.75 5.91 6.07 ****** VAPOUR PRESSURE (HPA) 7.96 ****** ****** 8.36 12.41 13.50 ****** 14.94 15.00 11.66 8.95 9.19 ****** SATURATION DEF. (HPA) 8.39 ****** ****** 38.74 49.08 58.02 ****** 58.62 46.19 27.69 22.27 11.52 ****** RELATIVE HUMIDITY (MEAN %) 51 *** *** 21 22 21 *** 22 26 32 32 48 *** RELATIVE HUMIDITY (MAX. %) 64 *** 52 38 36 36 38 38 39 44 48 74 *** RELATIVE HUMIDITY (MIN. %) 38 *** 21 12 14 13 14 13 18 26 23 32 *** RELATIVE HUMIDITY (MEAN% 03UTC) 61 *** 52 37 36 36 38 38 39 44 48 71 *** RELATIVE HUMIDITY (MEAN% 09UTC) 42 *** 25 16 17 16 17 19 22 27 25 38 *** RELATIVE HUMIDITY (MEAN% 15UTC) 57 *** 23 15 17 17 16 15 23 31 30 44 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 34.0 59.0 0.9 1.3 0.0 0.1 2.0 0.0 0.5 0.0 0.0 14.4 112.2 DAYS WITH PRECIPITATION >=10 1 3 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 2 5 0 0 0 0 0 0 0 0 0 1 8 DAYS WITH PRECIPITATION >= 1 6 7 0 1 0 0 1 0 0 0 0 4 19 DAYS WITH PRECIPITATION 6 7 2 2 0 1 1 0 2 0 0 7 28 GREATEST DAILY PRECIPITATION 17.0 20.0 0.5 1.0 0.0 0.1 2.0 0.0 0.5 0.0 0.0 6.0 20.0 DAY 31 1 13 1 ** 26 6 ** 14 ** ** 27 DAY WITH THUNDER STORM 0 0 0 0 0 1 1 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 2 6 2 9 9 5 4 0 0 1 38 WIND DIRECTION (PREVAILING) 225 *** *** 225 225 225 *** 225 225 225 225 225 *** PREVAILING WIND SPEED(KNOTS) 10.9 **** **** 11.6 9.1 8.0 **** 6.2 7.0 7.6 6.6 8.5 **** PREVAILING WIND PERCENT 6.5 ***** ***** 22.0 27.1 21.3 ***** 20.6 8.7 5.8 8.0 9.0 ***** CALMS PERCENT OF WIND 91.0 ***** ***** 64.0 53.5 39.3 ***** 47.1 80.7 85.2 86.7 83.2 ***** NO. OF WIND OBSERVATION 155 60 115 150 155 150 110 155 150 155 150 155 1660 VECTOR WIND DIRECTION (MEAN) 232 *** *** 230 227 226 *** 264 236 235 216 245 *** VECTOR WIND MAGNITUDE(KNOTS) 0.9 **** **** 3.5 3.4 3.0 **** 2.5 1.0 0.7 0.8 1.1 **** WIND STEADINESES (MEAN %) 90.0 ***** ***** 83.3 87.2 62.5 ***** 67.6 58.8 63.6 80.0 73.3 ***** WIND SPEED (MEAN KNOTS) 1.0 **** **** 4.2 3.9 4.8 **** 3.7 1.7 1.1 1.0 1.5 **** FASTEST WIND DIRECTION 270 *** *** 270 210 270 *** 300 260 210 190 230 *** FASTEST WIND SPEED (KNOTS) 15 *** *** 22 25 16 *** 18 18 16 16 15 *** DAY 12 ** ** 7 20 24 ** 4 25 31 18 3 DAYS WITH SKY CLEAR (0-2)/8 12 7 11 19 25 29 20 30 28 31 28 15 255 DAYS WITH P.CLOUDY (3-6)/8 13 4 6 8 5 1 2 1 1 0 2 11 54 DAYS WITH CLOUDY (7-8)/8 6 1 6 3 1 0 0 0 1 0 0 5 23 DAYS WITH VISIBILITY =< 2 KM 0 0 0 4 0 0 1 1 0 0 0 1 7 DURATION OF SUNSHINE HOURS 196.1 234.8 260.0 214.2 284.9 308.4 301.5 315.3 289.6 317.2 297.3 218.2 3237.5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 952.6 ****** 950.5 944.8 941.7 936.9 ****** 936.0 941.9 948.5 951.6 952.4 ****** MAX. QFE PRESSURE IN HPA 961.3 ****** 961.0 950.5 948.2 942.0 ****** 941.4 946.7 954.4 959.2 959.2 ****** DAY-HOUR 26- 6 **-** 7- 6 3- 6 2- 6 8- 6 **-** 24- 6 9- 6 15- 6 18- 6 21- 6 MIN. QFE PRESSURE IN HPA 944.9 ****** 942.0 938.6 933.0 931.3 ****** 930.9 935.4 943.7 946.1 947.2 ****** DAY-HOUR 18-15 **-** 22-15 29-15 25-12 20-15 **-** 11-15 1-12 3-12 8-12 1-12 MEAN QNH PRESSURE IN HPA 1021.8 ****** 1019.6 1013.5 1010.3 1005.2 ****** 1004.2 1010.5 1017.5 1020.8 1021.6 ****** MAX. QNH PRESSURE IN HPA 1031.0 ****** 1030.7 1019.6 1017.2 1010.6 ****** 1010.0 1015.6 1023.7 1028.8 1028.8 ****** DAY-HOUR 26- 6 **-** 7- 6 3- 6 2- 6 8- 6 **-** 24- 6 9- 6 15- 6 18- 6 21- 6 MIN. QNH PRESSURE IN HPA 1013.7 ****** 1010.6 1007.0 1001.1 999.3 ****** 998.8 1003.6 1012.4 1014.9 1016.1 ****** DAY-HOUR 18-15 **-** 22-15 29-15 25-12 20-15 **-** 11-15 1-12 3-12 8-12 1-12 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 954.3 ****** 951.0 945.8 942.9 937.6 935.3 937.2 943.5 949.8 952.7 953.1 ****** MAX. QFE PRESSURE IN HPA 960.2 ****** 960.0 949.0 947.7 940.3 938.1 940.8 945.9 954.0 957.8 958.0 ****** DAY 26 ** 8 16 3 28 23 24 18 15 18 21 MIN. QFE PRESSURE IN HPA 948.5 ****** 945.0 942.1 937.0 934.8 930.0 934.3 938.8 946.3 948.6 948.4 ****** DAY 31 ** 26 29 25 30 20 12 2 4 8 1 MEAN QNH PRESSURE IN HPA 1023.6 ****** 1020.1 1014.6 1011.6 1005.9 1003.5 1005.5 1012.2 1018.9 1022.0 1022.4 ****** MAX. QNH PRESSURE IN HPA 1029.9 ****** 1029.7 1018.0 1016.6 1008.8 1006.5 1009.3 1014.7 1023.3 1027.3 1027.5 ****** DAY 26 ** 8 16 3 28 23 24 18 15 18 21 MIN. QNH PRESSURE IN HPA 1017.5 ****** 1013.8 1010.7 1005.3 1003.0 997.9 1002.4 1007.2 1015.2 1017.6 1017.4 ****** DAY 31 ** 26 29 25 30 20 12 2 4 8 1 MEAN QFF PRESSURE IN HPA 1024.0 ****** 1015.0 1010.8 1006.4 1000.2 998.0 999.5 1007.2 1016.2 1020.3 1021.7 ****** MAX. QFF PRESSURE IN HPA 1031.1 ****** 1022.4 1014.7 1012.8 1003.2 1001.2 1003.3 1009.6 1021.0 1026.2 1027.1 ****** DAY 26 ** 14 3 3 28 27 24 9 15 18 18 MIN. QFF PRESSURE IN HPA 1017.8 ****** 1010.2 1006.1 999.2 996.5 992.7 995.9 1001.8 1011.2 1015.2 1015.8 ****** DAY 31 ** 26 29 25 30 3 11 2 4 8 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 954.9 ****** 952.4 947.0 943.6 938.9 936.8 938.1 944.0 950.8 953.8 954.4 ****** MAX. QFE PRESSURE IN HPA 961.3 ****** 961.0 950.5 948.2 942.0 939.1 941.4 946.7 954.4 959.2 959.2 ****** DAY 26 ** 7 3 2 8 29 24 9 15 18 21 MIN. QFE PRESSURE IN HPA 948.9 ****** 946.1 943.1 936.6 936.4 932.4 935.2 938.9 947.3 949.7 950.1 ****** DAY 19 ** 24 29 25 3 3 11 2 3 8 1 MEAN QNH PRESSURE IN HPA 1024.3 ****** 1021.6 1015.9 1012.2 1007.3 1005.1 1006.5 1012.8 1020.0 1023.1 1023.7 ****** MAX. QNH PRESSURE IN HPA 1031.0 ****** 1030.7 1019.6 1017.2 1010.6 1007.5 1010.0 1015.6 1023.7 1028.8 1028.8 ****** DAY 26 ** 7 3 2 8 29 24 9 15 18 21 MIN. QNH PRESSURE IN HPA 1017.9 ****** 1014.9 1011.8 1004.9 1004.7 1000.4 1003.4 1007.3 1016.2 1018.8 1019.2 ****** DAY 19 ** 24 29 25 3 3 11 2 3 8 1 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 952.7 ****** 950.9 945.4 942.1 937.4 935.4 936.7 942.5 948.8 951.7 952.4 ****** MAX. QFE PRESSURE IN HPA 958.9 ****** 959.0 948.6 946.5 940.7 937.8 939.7 944.5 952.4 956.6 956.5 ****** DAY 26 ** 3 3 2 28 22 21 9 14 18 18 MIN. QFE PRESSURE IN HPA 946.7 ****** 944.8 942.0 935.0 934.8 930.6 933.6 938.2 946.1 947.4 948.6 ****** DAY 18 ** 23 29 25 3 3 11 2 1 8 9 MEAN QNH PRESSURE IN HPA 1022.0 ****** 1020.0 1014.2 1010.7 1005.8 1003.6 1005.0 1011.1 1017.8 1020.9 1021.6 ****** MAX. QNH PRESSURE IN HPA 1028.5 ****** 1028.6 1017.6 1015.4 1009.2 1006.2 1008.2 1013.2 1021.6 1026.1 1026.0 ****** DAY 26 ** 3 3 2 28 22 21 9 14 18 18 MIN. QNH PRESSURE IN HPA 1015.6 ****** 1013.6 1010.6 1003.2 1003.0 998.5 1001.7 1006.6 1014.9 1016.3 1017.6 ****** DAY 18 ** 23 29 25 3 3 11 2 1 8 9 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 950.7 ****** 948.9 943.0 940.1 935.4 932.9 934.2 939.6 946.4 949.7 950.7 ****** MAX. QFE PRESSURE IN HPA 956.3 ****** 956.2 946.0 945.2 939.0 935.8 936.7 942.0 950.2 954.0 955.0 ****** DAY 26 ** 8 3 7 27 22 23 26 14 18 18 MIN. QFE PRESSURE IN HPA 945.5 ****** 942.5 939.2 933.0 931.9 928.1 931.1 935.4 943.7 946.1 947.2 ****** DAY 18 ** 22 30 25 20 3 11 1 3 8 1 MEAN QNH PRESSURE IN HPA 1019.8 ****** 1017.9 1011.6 1008.6 1003.6 1001.0 1002.3 1008.1 1015.3 1018.8 1019.8 ****** MAX. QNH PRESSURE IN HPA 1025.7 ****** 1025.6 1014.8 1014.0 1007.4 1004.0 1005.0 1010.6 1019.3 1023.3 1024.4 ****** DAY 26 ** 8 3 7 27 22 23 26 14 18 18 MIN. QNH PRESSURE IN HPA 1014.3 ****** 1011.1 1007.6 1001.1 999.9 995.9 999.1 1003.6 1012.4 1014.9 1016.1 ****** DAY 18 ** 22 30 25 20 3 11 1 3 8 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 950.3 ****** 949.3 942.6 939.9 935.1 932.1 933.6 940.2 946.6 950.1 951.5 ****** MAX. QFE PRESSURE IN HPA 955.9 ****** 958.0 945.6 944.7 938.4 935.7 936.2 942.2 950.4 954.4 955.5 ****** DAY 26 ** 7 3 8 8 22 21 30 14 18 17 MIN. QFE PRESSURE IN HPA 944.9 ****** 942.0 938.6 933.2 931.3 927.6 930.9 935.5 943.9 946.3 948.0 ****** DAY 18 ** 22 29 26 20 3 11 1 3 26 1 MEAN QNH PRESSURE IN HPA 1019.4 ****** 1018.3 1011.3 1008.4 1003.2 1000.1 1001.7 1008.6 1015.5 1019.2 1020.6 ****** MAX. QNH PRESSURE IN HPA 1025.3 ****** 1027.5 1014.4 1013.5 1006.8 1003.9 1004.5 1010.8 1019.5 1023.7 1024.9 ****** DAY 26 ** 7 3 8 8 22 21 30 14 18 17 MIN. QNH PRESSURE IN HPA 1013.7 ****** 1010.6 1007.0 1001.3 999.3 995.4 998.8 1003.7 1012.6 1015.2 1017.0 ****** DAY 18 ** 22 29 26 20 3 11 1 3 26 1 MEAN QFF PRESSURE IN HPA 1019.7 ****** 1013.1 1007.5 1003.3 997.6 994.3 995.8 1003.6 1012.6 1017.5 1020.0 ****** MAX. QFF PRESSURE IN HPA 1026.5 ****** 1019.3 1011.8 1009.0 1001.2 998.7 998.8 1006.4 1016.6 1022.5 1025.5 ****** DAY 26 ** 10 3 8 8 22 21 30 14 18 17 MIN. QFF PRESSURE IN HPA 1013.6 ****** 1006.9 1002.7 995.1 993.9 989.3 992.3 998.0 1008.7 1012.9 1016.0 ****** DAY 31 ** 22 29 26 29 3 11 1 4 8 1 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 15.5 18.1 23.1 28.1 36.1 38.9 38.7 37.0 34.4 29.0 22.5 17.9 28.3 MINIMUN AIR TEMPERATURE (C) 7.4 9.7 12.9 17.7 23.8 27.2 30.1 27.2 22.9 16.3 11.1 7.5 17.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 5 29 30 31 30 25 7 0 0 157 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 0 0 0 0 0 0 0 0 0 0 2 3 TEMPERATURE RECORDS LOWEST(C) -1.0 4.0 4.0 11.0 18.0 24.0 26.0 20.0 18.0 8.0 7.0 -1.0 -1.0 DAY 16 14 11 6 15 13 5 31 8 22 16 27 MAXIMUM AIR TEMPERATURE (C) 20.5 23.4 29.0 34.0 42.0 44.7 44.6 43.0 41.0 35.4 29.3 24.4 34.3 DAYS WITH MAXIMUM TEMP. >=30 0 2 15 26 31 30 31 31 30 28 10 0 234 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.0 31.0 36.0 40.0 46.0 48.0 47.0 48.0 43.0 41.0 34.0 29.0 48.0 DAY 4 28 2 30 24 27 11 11 14 4 1 10 DIF. BETWEEN (MAX.-MIN.) (C) 13.1 13.7 16.1 16.3 18.2 17.5 14.5 15.8 18.1 19.1 18.2 16.9 16.5 MEAN DAILY TEMP. (MDT) (C) 13.9 16.5 21.0 25.9 32.9 36.0 37.4 35.1 31.9 25.8 20.2 15.9 26.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 4.0 48.5 149.0 369.0 449.0 507.5 438.0 328.0 158.0 15.0 0.0 2466.0 HEATING DEG. DAYS(BASE 18 0C) 126.5 59.0 16.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.5 69.0 272.0 DEWPOINT (MEAN C) 1.9 4.1 1.9 4.6 6.3 5.0 13.0 13.0 11.1 16.2 14.0 2.0 7.8 MIXING RATIO (G/KG) 5.17 5.86 4.89 6.00 6.55 6.06 11.17 11.13 9.39 12.81 11.10 4.95 7.92 VAPOUR PRESSURE (HPA) 7.84 8.86 7.39 9.03 9.80 9.03 16.45 16.39 13.98 19.05 16.65 7.51 11.83 SATURATION DEF. (HPA) 10.57 12.91 22.52 30.81 52.38 62.61 54.09 48.72 42.69 23.80 12.19 14.22 32.29 RELATIVE HUMIDITY (MEAN %) 46 45 28 26 18 14 26 29 27 48 59 37 34 RELATIVE HUMIDITY (MAX. %) 68 71 53 46 33 25 46 48 42 58 70 55 51 RELATIVE HUMIDITY (MIN. %) 32 30 16 15 10 8 14 18 18 41 53 26 23 RELATIVE HUMIDITY (MEAN% 03UTC) 68 71 53 45 33 25 46 47 42 58 70 54 51 RELATIVE HUMIDITY (MEAN% 09UTC) 35 38 21 19 13 10 22 22 22 43 55 30 28 RELATIVE HUMIDITY (MEAN% 15UTC) 44 36 20 20 15 11 18 22 22 47 58 37 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 64.9 11.6 8.4 10.0 17.0 0.0 18.2 3.5 0.1 0.0 0.0 0.1 133.8 DAYS WITH PRECIPITATION >=10 2 0 0 1 1 0 1 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 3 1 1 1 1 0 1 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 1 3 2 1 1 2 0 1 2 0 0 0 0 12 DAYS WITH PRECIPITATION 8 4 3 3 3 0 2 4 1 0 0 1 29 GREATEST DAILY PRECIPITATION 42.0 9.0 8.0 10.0 16.0 0.0 18.0 2.0 0.1 0.0 0.0 0.1 42.0 DAY 26 11 9 24 15 ** 4 16 16 ** ** 20 DAY WITH THUNDER STORM 0 1 0 0 0 0 0 2 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 2 6 2 4 1 18 5 1 0 2 1 43 WIND DIRECTION (PREVAILING) 225 225 225 225 225 225 225 225 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 8.7 9.7 9.3 8.0 7.2 7.9 7.8 6.8 6.9 5.8 5.3 7.4 7.5 PREVAILING WIND PERCENT 8.4 8.6 16.1 18.7 12.3 15.3 14.2 15.5 16.0 12.9 13.3 9.7 13.4 CALMS PERCENT OF WIND 74.8 76.4 59.4 55.3 58.7 56.0 51.6 56.1 56.0 63.2 71.3 72.3 62.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 237 236 242 240 224 235 221 245 239 230 225 232 235 VECTOR WIND MAGNITUDE(KNOTS) 1.0 1.5 2.7 2.8 1.6 2.4 1.8 2.4 2.1 1.1 1.0 0.9 1.8 WIND STEADINESES (MEAN %) 47.6 75.0 75.0 77.8 53.3 70.6 41.9 64.9 65.6 52.4 66.7 56.3 62.1 WIND SPEED (MEAN KNOTS) 2.1 2.0 3.6 3.6 3.0 3.4 4.3 3.7 3.2 2.1 1.5 1.6 2.9 FASTEST WIND DIRECTION 310 270 230 230 120 310 110 350 160 210 270 230 110 FASTEST WIND SPEED (KNOTS) 18 18 22 26 14 16 38 28 20 12 10 22 38 DAY 14 12 2 19 13 29 23 16 16 18 20 19 DAYS WITH SKY CLEAR (0-2)/8 19 13 18 17 26 26 26 19 27 31 26 21 269 DAYS WITH P.CLOUDY (3-6)/8 8 10 13 11 4 4 5 7 3 0 4 9 78 DAYS WITH CLOUDY (7-8)/8 4 5 0 2 1 0 0 5 0 0 0 1 18 DAYS WITH VISIBILITY =< 2 KM 0 0 0 1 0 0 3 0 0 0 0 0 4 DURATION OF SUNSHINE HOURS 228.5 208.8 268.9 260.1 327.0 321.1 291.9 270.8 301.5 324.0 286.7 244.6 3333.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 952.6 950.6 948.2 945.9 941.1 935.3 934.0 934.9 941.0 946.2 951.5 953.0 944.5 MAX. QFE PRESSURE IN HPA 962.4 957.7 955.7 954.1 947.0 942.2 940.8 942.0 948.0 955.0 958.0 959.0 962.4 DAY-HOUR 15- 6 19- 6 24- 6 5- 6 20- 6 5- 6 26- 6 30- 6 22- 6 28- 6 21- 6 5- 6 MIN. QFE PRESSURE IN HPA 947.4 943.3 940.8 939.0 934.2 929.2 928.0 926.0 934.0 937.0 943.2 947.0 926.0 DAY-HOUR 13-12 12-12 3-12 25-12 31-15 19-15 16-12 13-15 9-12 3-12 29-12 2-12 MEAN QNH PRESSURE IN HPA 1021.9 1019.8 1017.2 1014.8 1009.6 1003.5 1002.1 1003.1 1009.5 1015.0 1020.7 1022.2 1013.3 MAX. QNH PRESSURE IN HPA 1032.2 1027.2 1025.1 1023.4 1015.9 1010.8 1009.3 1010.6 1017.0 1024.4 1027.5 1028.6 1032.2 DAY-HOUR 15- 6 19- 6 24- 6 5- 6 20- 6 5- 6 26- 6 30- 6 22- 6 28- 6 21- 6 5- 6 MIN. QNH PRESSURE IN HPA 1016.3 1012.0 1009.3 1007.4 1002.3 997.0 995.8 993.7 1002.1 1005.3 1011.9 1015.9 993.7 DAY-HOUR 13-12 12-12 3-12 25-12 31-15 19-15 16-12 13-15 9-12 3-12 29-12 2-12 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 953.3 951.3 949.2 946.9 942.6 937.0 935.9 936.5 942.6 947.5 952.4 953.6 945.7 MAX. QFE PRESSURE IN HPA 960.4 955.5 954.6 953.0 945.9 941.1 940.3 941.0 946.7 953.5 956.7 957.8 960.4 DAY 15 19 24 5 6 5 26 30 22 28 21 5 MIN. QFE PRESSURE IN HPA 948.4 944.4 942.3 941.5 939.6 933.5 932.5 931.5 938.8 940.0 947.0 949.2 931.5 DAY 13 12 3 25 31 19 17 14 10 4 29 3 MEAN QNH PRESSURE IN HPA 1022.5 1020.4 1018.3 1015.8 1011.2 1005.3 1004.1 1004.8 1011.2 1016.4 1021.6 1022.9 1014.5 MAX. QNH PRESSURE IN HPA 1030.1 1024.9 1023.9 1022.2 1014.7 1009.6 1008.8 1009.5 1015.6 1022.8 1026.2 1027.3 1030.1 DAY 15 19 24 5 6 5 26 30 22 28 21 5 MIN. QNH PRESSURE IN HPA 1017.4 1013.1 1010.9 1010.1 1008.1 1001.6 1000.5 999.5 1007.2 1008.5 1015.9 1018.2 999.5 DAY 13 12 3 25 31 19 17 14 10 4 29 3 MEAN QFF PRESSURE IN HPA 1022.4 1019.5 1016.4 1012.7 1006.3 999.7 998.1 999.3 1006.7 1013.2 1020.1 1022.5 1011.4 MAX. QFF PRESSURE IN HPA 1031.5 1025.0 1022.2 1020.5 1009.8 1004.3 1003.2 1005.4 1011.6 1020.7 1025.0 1028.1 1031.5 DAY 16 19 24 5 6 12 26 31 22 28 21 27 MIN. QFF PRESSURE IN HPA 1016.1 1011.7 1007.6 1007.6 1002.2 996.0 994.9 993.1 1002.2 1004.4 1014.3 1017.0 993.1 DAY 13 12 3 25 31 19 17 14 10 4 29 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 954.7 952.6 950.5 948.0 943.6 937.7 936.3 937.2 943.6 948.6 953.7 955.0 946.8 MAX. QFE PRESSURE IN HPA 962.4 957.7 955.7 954.1 947.0 942.2 940.8 942.0 948.0 955.0 958.0 959.0 962.4 DAY 15 19 24 5 20 5 26 30 22 28 21 5 MIN. QFE PRESSURE IN HPA 950.1 946.0 943.9 942.8 940.3 934.0 932.8 932.0 939.7 941.6 948.0 950.2 932.0 DAY 13 12 3 25 31 19 16 13 10 4 29 3 MEAN QNH PRESSURE IN HPA 1024.0 1021.8 1019.6 1017.0 1012.3 1006.0 1004.6 1005.6 1012.3 1017.6 1023.0 1024.4 1015.7 MAX. QNH PRESSURE IN HPA 1032.2 1027.2 1025.1 1023.4 1015.9 1010.8 1009.3 1010.6 1017.0 1024.4 1027.5 1028.6 1032.2 DAY 15 19 24 5 20 5 26 30 22 28 21 5 MIN. QNH PRESSURE IN HPA 1019.2 1014.8 1012.6 1011.4 1008.8 1002.1 1000.9 1000.0 1008.2 1010.2 1017.0 1019.3 1000.0 DAY 13 12 3 25 31 19 16 13 10 4 29 3 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 952.5 951.3 948.9 946.6 941.6 935.8 934.4 935.2 941.3 946.7 952.0 953.4 945.0 MAX. QFE PRESSURE IN HPA 960.0 955.7 953.8 952.4 944.8 939.7 939.0 939.7 945.7 953.0 956.2 956.9 960.0 DAY 15 19 24 6 20 5 26 18 22 28 21 5 MIN. QFE PRESSURE IN HPA 948.2 944.6 942.5 941.8 937.8 932.0 930.4 930.0 937.2 939.7 946.5 949.0 930.0 DAY 13 12 3 25 31 30 16 13 9 3 29 3 MEAN QNH PRESSURE IN HPA 1021.7 1020.4 1018.0 1015.5 1010.2 1004.0 1002.5 1003.5 1009.8 1015.6 1021.2 1022.7 1013.7 MAX. QNH PRESSURE IN HPA 1029.7 1025.1 1023.1 1021.6 1013.6 1008.2 1007.4 1008.2 1014.5 1022.2 1025.6 1026.4 1029.7 DAY 15 19 24 6 20 5 26 18 22 28 21 5 MIN. QNH PRESSURE IN HPA 1017.2 1013.4 1011.1 1010.4 1006.2 1000.0 998.3 997.9 1005.5 1008.2 1015.4 1018.0 997.9 DAY 13 12 3 25 31 30 16 13 9 3 29 3 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 951.0 948.9 946.2 944.0 938.8 933.2 931.6 932.7 938.5 944.1 949.4 950.9 942.5 MAX. QFE PRESSURE IN HPA 958.1 953.2 950.4 949.8 942.4 936.8 936.0 937.2 943.0 949.8 953.6 954.4 958.1 DAY 15 19 24 6 20 5 25 17 22 28 21 5 MIN. QFE PRESSURE IN HPA 947.4 943.3 940.8 939.0 935.0 930.0 928.0 926.4 934.0 937.0 943.2 947.0 926.4 DAY 13 12 3 25 31 19 16 13 9 3 29 2 MEAN QNH PRESSURE IN HPA 1020.1 1017.9 1015.0 1012.8 1007.2 1001.3 999.6 1000.8 1006.9 1012.8 1018.4 1020.1 1011.1 MAX. QNH PRESSURE IN HPA 1027.6 1022.5 1019.5 1018.9 1011.0 1005.1 1004.2 1005.5 1011.7 1018.9 1022.9 1023.7 1027.6 DAY 15 19 24 6 20 5 25 17 22 28 21 5 MIN. QNH PRESSURE IN HPA 1016.3 1012.0 1009.3 1007.4 1003.2 997.9 995.8 994.1 1002.1 1005.3 1011.9 1015.9 994.1 DAY 13 12 3 25 31 19 16 13 9 3 29 2 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 951.8 949.3 946.4 944.2 938.9 933.0 931.8 932.8 939.1 944.2 950.3 951.9 942.8 MAX. QFE PRESSURE IN HPA 959.2 954.0 950.0 950.5 942.8 937.4 936.4 938.0 943.5 950.0 954.6 955.2 959.2 DAY 15 19 10 6 20 11 25 18 22 28 21 21 MIN. QFE PRESSURE IN HPA 948.8 944.0 941.4 939.5 934.2 929.2 928.3 926.0 935.0 937.0 943.9 947.9 926.0 DAY 7 12 3 25 31 19 16 13 9 3 29 2 MEAN QNH PRESSURE IN HPA 1021.0 1018.3 1015.3 1012.9 1007.3 1001.1 999.8 1000.9 1007.5 1012.9 1019.4 1021.1 1011.5 MAX. QNH PRESSURE IN HPA 1028.8 1023.3 1019.1 1019.6 1011.4 1005.7 1004.7 1006.4 1012.2 1019.1 1023.9 1024.6 1028.8 DAY 15 19 10 6 20 11 25 18 22 28 21 21 MIN. QNH PRESSURE IN HPA 1017.8 1012.7 1010.0 1008.0 1002.3 997.0 996.1 993.7 1003.2 1005.3 1012.6 1016.8 993.7 DAY 7 12 3 25 31 19 16 13 9 3 29 2 MEAN QFF PRESSURE IN HPA 1020.8 1017.4 1013.5 1009.8 1002.4 995.5 994.1 995.6 1003.0 1009.5 1017.7 1020.6 1008.3 MAX. QFF PRESSURE IN HPA 1029.5 1023.4 1019.1 1018.3 1006.6 1000.6 999.2 1001.8 1008.2 1016.5 1022.7 1025.2 1029.5 DAY 15 19 10 6 20 11 25 31 22 28 21 27 MIN. QFF PRESSURE IN HPA 1016.8 1011.5 1007.3 1004.5 996.5 991.4 990.5 988.0 998.7 1001.2 1010.7 1015.9 988.0 DAY 7 11 3 15 31 19 16 13 9 3 29 3 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 17.2 16.3 20.6 27.7 35.5 38.8 37.9 37.6 35.6 30.2 20.7 17.7 28.0 MINIMUN AIR TEMPERATURE (C) 8.4 9.3 13.7 17.9 23.2 27.4 29.4 27.6 25.9 20.1 9.6 8.9 18.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 6 28 30 31 31 30 11 0 0 167 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 4.0 5.0 10.0 14.0 19.0 24.0 24.0 24.0 22.0 17.0 4.0 6.0 4.0 DAY 15 18 4 9 1 8 24 26 27 25 20 2 MAXIMUM AIR TEMPERATURE (C) 23.3 21.6 25.1 33.2 41.4 44.7 44.0 43.9 41.9 36.6 27.9 24.4 34.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 23 31 30 31 31 30 31 11 0 218 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 28.0 29.0 29.0 38.0 47.0 47.0 47.0 46.0 44.0 39.0 33.0 28.0 47.0 DAY 21 13 14 18 31 1 9 2 1 1 5 13 DIF. BETWEEN (MAX.-MIN.) (C) 14.9 12.3 11.4 15.3 18.2 17.3 14.6 16.3 16.0 16.5 18.3 15.5 15.6 MEAN DAILY TEMP. (MDT) (C) 15.8 15.4 19.4 25.5 32.3 36.0 36.7 35.8 33.9 28.4 18.7 16.7 26.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 6.0 138.5 350.5 451.0 485.5 457.5 387.0 228.0 20.5 0.0 2524.5 HEATING DEG. DAYS(BASE 18 0C) 71.5 82.0 4.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 34.0 46.5 238.0 DEWPOINT (MEAN C) 2.1 6.5 9.4 8.4 7.0 9.7 19.1 11.1 11.9 9.2 2.7 3.8 8.4 MIXING RATIO (G/KG) 4.87 6.72 8.13 7.62 6.84 8.37 15.89 9.47 9.83 7.96 5.06 5.50 8.02 VAPOUR PRESSURE (HPA) 7.39 10.14 12.22 11.44 10.24 12.43 23.20 14.01 14.62 11.96 7.67 8.34 11.97 SATURATION DEF. (HPA) 13.22 9.19 12.66 27.61 49.99 59.14 44.82 53.11 45.46 32.93 18.60 13.05 31.65 RELATIVE HUMIDITY (MEAN %) 39 57 53 36 19 20 38 24 27 30 32 42 35 RELATIVE HUMIDITY (MAX. %) 58 81 78 61 36 36 56 45 49 49 50 64 55 RELATIVE HUMIDITY (MIN. %) 27 40 37 22 11 12 25 11 14 19 24 30 23 RELATIVE HUMIDITY (MEAN% 03UTC) 57 78 76 61 36 36 56 45 49 48 50 63 55 RELATIVE HUMIDITY (MEAN% 09UTC) 32 49 43 26 14 14 32 18 22 23 25 34 28 RELATIVE HUMIDITY (MEAN% 15UTC) 39 51 50 30 14 15 32 15 18 24 29 38 30 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 2.8 59.3 62.2 20.5 0.0 0.0 36.3 0.0 0.0 0.4 0.0 16.0 197.5 DAYS WITH PRECIPITATION >=10 0 3 1 1 0 0 2 0 0 0 0 1 8 DAYS WITH PRECIPITATION >= 5 0 4 6 2 0 0 3 0 0 0 0 1 16 DAYS WITH PRECIPITATION >= 1 1 7 8 2 0 0 4 0 0 0 0 3 25 DAYS WITH PRECIPITATION 3 10 12 4 0 0 4 0 0 1 0 3 37 GREATEST DAILY PRECIPITATION 2.0 21.0 17.0 15.0 0.0 0.0 15.0 0.0 0.0 0.4 0.0 12.0 21.0 DAY 31 7 25 7 ** ** 24 ** ** 9 ** 31 DAY WITH THUNDER STORM 0 0 1 1 0 0 1 0 0 1 0 0 4 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 1 1 2 5 3 6 1 1 0 1 1 23 WIND DIRECTION (PREVAILING) 225 225 225 225 225 225 225 180 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 5.2 7.5 6.2 7.0 5.9 6.4 6.4 7.2 6.7 6.5 6.2 5.9 6.3 PREVAILING WIND PERCENT 12.3 13.1 16.1 17.3 30.3 18.0 22.6 17.4 16.7 16.1 8.0 10.3 16.4 CALMS PERCENT OF WIND 69.0 67.6 66.5 58.7 52.3 47.3 46.5 54.2 66.0 72.9 79.3 81.3 63.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 238 234 236 228 228 244 210 218 222 219 223 228 226 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.8 1.5 1.7 2.6 2.0 2.2 2.4 1.7 1.5 0.9 0.8 1.6 WIND STEADINESES (MEAN %) 35.3 40.0 65.2 68.0 86.7 55.6 56.4 77.4 77.3 78.9 75.0 72.7 66.7 WIND SPEED (MEAN KNOTS) 1.7 2.0 2.3 2.5 3.0 3.6 3.9 3.1 2.2 1.9 1.2 1.1 2.4 FASTEST WIND DIRECTION 200 210 280 220 250 170 110 190 130 180 240 230 170 FASTEST WIND SPEED (KNOTS) 18 18 16 18 18 24 22 24 14 18 10 10 24 DAY 12 1 1 21 23 7 15 7 5 9 12 6 DAYS WITH SKY CLEAR (0-2)/8 19 12 10 19 25 29 20 26 28 28 25 23 264 DAYS WITH P.CLOUDY (3-6)/8 8 9 10 7 6 1 8 5 2 3 4 8 71 DAYS WITH CLOUDY (7-8)/8 4 8 11 4 0 0 3 0 0 0 1 0 31 DAYS WITH VISIBILITY =< 2 KM 0 0 0 1 1 1 2 1 1 0 0 0 7 DURATION OF SUNSHINE HOURS 238.0 191.3 190.0 270.3 326.1 309.6 ****** ****** ****** 299.1 286.7 249.5 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 951.2 950.3 948.0 946.2 941.9 936.5 933.2 935.7 940.9 947.0 951.3 952.7 944.6 MAX. QFE PRESSURE IN HPA 956.3 956.7 954.8 951.8 949.0 942.8 939.0 940.5 948.2 953.8 958.3 959.8 959.8 DAY-HOUR 5- 6 21- 9 4- 6 8- 6 10- 6 21- 6 22- 6 27- 6 21- 6 31- 6 13- 6 13- 6 MIN. QFE PRESSURE IN HPA 945.1 944.5 941.4 940.6 935.3 929.4 928.0 929.8 933.6 939.7 941.3 947.5 928.0 DAY-HOUR 12-12 14-12 15-12 28-12 25-12 5-15 30-15 1-12 1-12 19-12 29-12 25-12 MEAN QNH PRESSURE IN HPA 1020.4 1019.3 1017.0 1015.1 1010.4 1004.8 1001.3 1003.9 1009.4 1015.9 1020.4 1022.0 1013.3 MAX. QNH PRESSURE IN HPA 1025.7 1026.2 1024.2 1021.0 1018.0 1011.4 1007.4 1009.0 1017.2 1023.1 1027.9 1029.4 1029.4 DAY-HOUR 5- 6 21- 9 4- 6 8- 6 10- 6 21- 6 22- 6 27- 6 21- 6 31- 6 13- 6 13- 6 MIN. QNH PRESSURE IN HPA 1013.9 1013.2 1010.0 1009.1 1003.5 997.3 995.8 997.7 1001.7 1008.2 1009.9 1016.4 995.8 DAY-HOUR 12-12 14-12 15-12 28-12 25-12 5-15 30-15 1-12 1-12 19-12 29-12 25-12 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 951.7 950.6 948.4 947.2 942.9 938.0 934.8 937.1 942.3 948.2 952.4 953.4 945.6 MAX. QFE PRESSURE IN HPA 954.8 955.5 952.8 950.8 947.6 941.7 938.3 939.5 946.7 952.0 956.7 958.5 958.5 DAY 5 21 4 8 10 21 22 27 21 31 13 13 MIN. QFE PRESSURE IN HPA 948.4 945.4 943.0 943.3 938.5 933.1 932.7 933.0 938.3 944.0 944.3 948.5 932.7 DAY 12 16 15 28 25 6 10 1 1 19 29 31 MEAN QNH PRESSURE IN HPA 1020.9 1019.7 1017.4 1016.1 1011.6 1006.4 1003.0 1005.4 1011.0 1017.2 1021.6 1022.6 1014.4 MAX. QNH PRESSURE IN HPA 1024.2 1024.9 1022.0 1019.9 1016.5 1010.3 1006.7 1008.0 1015.6 1021.2 1026.2 1028.1 1028.1 DAY 5 21 4 8 10 21 22 27 21 31 13 13 MIN. QNH PRESSURE IN HPA 1017.4 1014.2 1011.7 1012.0 1006.9 1001.2 1000.8 1001.1 1006.7 1012.7 1013.0 1017.5 1000.8 DAY 12 16 15 28 25 6 10 1 1 19 29 31 MEAN QFF PRESSURE IN HPA 1020.5 1019.2 1015.8 1012.9 1006.8 1000.8 997.1 1000.0 1006.0 1013.8 1020.8 1022.4 1011.3 MAX. QFF PRESSURE IN HPA 1024.6 1024.8 1021.1 1018.6 1012.1 1004.5 1000.8 1003.1 1011.2 1018.3 1026.0 1027.5 1027.5 DAY 5 22 4 8 10 21 22 28 21 31 13 13 MIN. QFF PRESSURE IN HPA 1016.9 1012.3 1009.6 1008.6 1001.9 995.3 994.2 995.4 1001.4 1009.2 1012.1 1016.4 994.2 DAY 12 14 15 28 25 6 10 1 1 19 29 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 953.5 952.1 949.8 948.2 944.1 938.9 935.4 938.0 943.5 949.4 953.7 955.0 946.8 MAX. QFE PRESSURE IN HPA 956.3 956.6 954.8 951.8 949.0 942.8 939.0 940.5 948.2 953.8 958.3 959.8 959.8 DAY 5 21 4 8 10 21 22 27 21 31 13 13 MIN. QFE PRESSURE IN HPA 949.6 946.2 945.0 944.4 939.7 934.2 933.2 934.0 939.4 944.8 946.0 949.5 933.2 DAY 12 14 14 22 25 6 31 1 2 19 29 31 MEAN QNH PRESSURE IN HPA 1022.7 1021.3 1018.9 1017.2 1012.8 1007.4 1003.6 1006.4 1012.2 1018.4 1023.0 1024.3 1015.7 MAX. QNH PRESSURE IN HPA 1025.7 1026.1 1024.2 1021.0 1018.0 1011.4 1007.4 1009.0 1017.2 1023.1 1027.9 1029.4 1029.4 DAY 5 21 4 8 10 21 22 27 21 31 13 13 MIN. QNH PRESSURE IN HPA 1018.6 1015.1 1013.8 1013.1 1008.2 1002.3 1001.3 1002.1 1007.8 1013.6 1014.8 1018.5 1001.3 DAY 12 14 14 22 25 6 31 1 2 19 29 31 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 951.7 950.8 948.5 946.8 942.2 936.9 933.6 936.1 941.6 947.4 951.6 952.9 945.0 MAX. QFE PRESSURE IN HPA 954.2 956.7 953.7 950.5 947.2 940.8 936.7 938.7 946.0 951.8 956.0 958.0 958.0 DAY 1 21 4 14 10 21 22 27 21 31 13 14 MIN. QFE PRESSURE IN HPA 947.3 945.2 943.6 943.1 937.6 932.8 931.3 931.6 937.5 943.3 943.8 948.0 931.3 DAY 12 14 15 28 25 5 31 1 7 19 29 31 MEAN QNH PRESSURE IN HPA 1020.8 1019.9 1017.5 1015.7 1010.8 1005.2 1001.7 1004.4 1010.1 1016.3 1020.8 1022.1 1013.8 MAX. QNH PRESSURE IN HPA 1023.5 1026.2 1023.0 1019.6 1016.1 1009.3 1005.0 1007.1 1014.8 1021.0 1025.4 1027.5 1027.5 DAY 1 21 4 14 10 21 22 27 21 31 13 14 MIN. QNH PRESSURE IN HPA 1016.2 1014.0 1012.3 1011.8 1005.9 1000.9 999.3 999.6 1005.8 1012.0 1012.5 1017.0 999.3 DAY 12 14 15 28 25 5 31 1 7 19 29 31 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 949.3 948.5 946.4 944.4 939.9 934.2 930.9 933.3 938.4 944.7 949.0 950.9 942.5 MAX. QFE PRESSURE IN HPA 952.7 954.6 951.0 949.6 944.5 937.6 934.4 936.0 943.0 950.0 953.2 956.3 956.3 DAY 1 21 3 7 10 21 5 27 21 31 14 14 MIN. QFE PRESSURE IN HPA 945.1 944.5 941.4 940.6 935.3 929.7 928.2 929.8 933.6 939.7 941.3 947.5 928.2 DAY 12 14 15 28 25 5 10 1 1 19 29 25 MEAN QNH PRESSURE IN HPA 1018.3 1017.5 1015.3 1013.1 1008.4 1002.3 998.8 1001.4 1006.8 1013.5 1018.0 1020.1 1011.1 MAX. QNH PRESSURE IN HPA 1021.9 1023.9 1020.1 1018.6 1013.2 1005.9 1002.6 1004.2 1011.7 1019.1 1022.5 1025.7 1025.7 DAY 1 21 3 7 10 21 5 27 21 31 14 14 MIN. QNH PRESSURE IN HPA 1013.9 1013.2 1010.0 1009.1 1003.5 997.6 996.0 997.7 1001.7 1008.2 1009.9 1016.4 996.0 DAY 12 14 15 28 25 5 10 1 1 19 29 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 950.1 949.3 947.0 944.7 940.2 934.4 931.5 933.8 938.8 945.3 949.7 951.6 943.0 MAX. QFE PRESSURE IN HPA 953.0 955.4 951.7 951.4 945.2 938.0 934.5 936.3 943.0 950.8 953.6 956.7 956.7 DAY 1 21 3 7 10 21 6 27 21 31 14 14 MIN. QFE PRESSURE IN HPA 945.5 945.1 942.6 941.0 935.7 929.4 928.0 930.1 934.2 940.5 941.9 948.1 928.0 DAY 12 14 11 28 31 5 30 1 1 19 29 26 MEAN QNH PRESSURE IN HPA 1019.2 1018.4 1015.9 1013.5 1008.7 1002.6 999.5 1001.9 1007.2 1014.1 1018.8 1020.8 1011.7 MAX. QNH PRESSURE IN HPA 1022.2 1024.8 1020.9 1020.6 1014.0 1006.4 1002.7 1004.6 1011.7 1019.9 1022.9 1026.2 1026.2 DAY 1 21 3 7 10 21 6 27 21 31 14 14 MIN. QNH PRESSURE IN HPA 1014.3 1013.9 1011.2 1009.5 1003.9 997.3 995.8 998.0 1002.3 1009.0 1010.5 1017.1 995.8 DAY 12 14 11 28 31 5 30 1 1 19 29 26 MEAN QFF PRESSURE IN HPA 1018.8 1017.8 1014.3 1010.3 1003.9 997.0 993.8 996.6 1002.4 1010.7 1018.0 1020.6 1008.7 MAX. QFF PRESSURE IN HPA 1022.2 1024.7 1019.5 1018.9 1009.8 1000.8 996.9 999.7 1007.3 1017.1 1023.0 1025.7 1025.7 DAY 5 21 3 7 10 8 22 26 21 31 14 14 MIN. QFF PRESSURE IN HPA 1014.0 1012.4 1009.3 1006.3 998.1 991.4 989.8 992.5 997.2 1005.5 1009.6 1016.6 989.8 DAY 12 14 15 28 31 5 10 1 1 19 29 29 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 13.9 19.1 24.9 27.1 35.6 36.9 37.5 35.4 32.0 29.3 22.6 18.1 27.7 MINIMUN AIR TEMPERATURE (C) 7.8 9.1 16.4 19.1 24.4 29.5 30.3 28.0 22.6 20.4 15.1 10.5 19.4 DAYS WITH MINIMUM TEMP. >=21 0 0 3 11 31 30 31 31 26 13 2 0 178 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS LOWEST(C) 0.0 4.0 11.0 15.0 22.0 25.0 25.0 24.0 19.0 17.0 8.0 4.0 0.0 DAY 15 4 1 4 1 2 4 12 10 25 29 28 MAXIMUM AIR TEMPERATURE (C) 19.1 26.0 34.3 35.9 41.9 45.1 45.5 43.4 40.4 37.3 30.5 25.4 35.4 DAYS WITH MAXIMUM TEMP. >=30 0 5 31 29 31 30 31 31 30 31 17 3 269 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.0 32.0 38.0 41.0 44.0 49.0 47.0 47.0 45.0 40.0 37.0 31.0 49.0 DAY 7 21 19 16 9 29 5 9 2 1 1 5 DIF. BETWEEN (MAX.-MIN.) (C) 11.3 16.9 17.9 16.8 17.5 15.6 15.2 15.4 17.8 16.9 15.4 14.9 16.0 MEAN DAILY TEMP. (MDT) (C) 13.5 17.5 25.3 27.5 33.1 37.3 37.9 35.7 31.5 28.8 22.8 18.0 27.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.5 135.0 195.5 376.5 488.5 524.5 456.0 315.5 242.5 67.0 1.0 2802.5 HEATING DEG. DAYS(BASE 18 0C) 145.5 30.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 37.0 213.5 DEWPOINT (MEAN C) 6.8 2.4 5.7 9.7 11.4 14.8 15.4 13.4 6.3 9.7 8.1 7.3 9.3 MIXING RATIO (G/KG) 6.86 4.94 6.41 8.54 9.28 11.96 12.74 11.02 6.68 8.13 7.39 6.98 8.41 VAPOUR PRESSURE (HPA) 10.36 7.49 9.68 12.76 13.82 17.62 18.67 16.28 10.01 12.23 11.15 10.55 12.55 SATURATION DEF. (HPA) 6.33 16.11 28.99 30.58 46.52 54.78 54.17 49.53 46.02 35.64 21.58 13.90 33.68 RELATIVE HUMIDITY (MEAN %) 65 37 28 35 25 27 29 29 20 28 38 47 34 RELATIVE HUMIDITY (MAX. %) 90 59 43 54 42 45 50 50 36 44 59 67 53 RELATIVE HUMIDITY (MIN. %) 49 23 19 24 17 17 17 16 12 20 25 34 23 RELATIVE HUMIDITY (MEAN% 03UTC) 89 58 43 54 42 44 50 49 36 44 58 66 53 RELATIVE HUMIDITY (MEAN% 09UTC) 54 28 21 28 19 21 22 22 15 22 28 41 27 RELATIVE HUMIDITY (MEAN% 15UTC) 60 33 26 30 23 24 22 24 15 25 38 44 30 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 38.5 0.5 0.0 0.7 0.8 4.0 25.0 25.0 0.0 0.5 11.0 19.6 125.6 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 1 1 0 0 1 0 4 DAYS WITH PRECIPITATION >= 5 4 0 0 0 0 0 2 1 0 0 1 2 10 DAYS WITH PRECIPITATION >= 1 8 0 0 0 0 1 2 2 0 0 1 4 18 DAYS WITH PRECIPITATION 10 2 1 2 2 1 3 2 0 1 1 5 30 GREATEST DAILY PRECIPITATION 11.0 0.3 0.0 0.4 0.6 4.0 17.0 23.0 0.0 0.5 11.0 7.0 23.0 DAY 9 26 ** 1 29 19 18 11 ** 13 17 25 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 1 0 0 0 0 1 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 1 4 13 13 16 28 14 7 0 0 0 96 WIND DIRECTION (PREVAILING) 180 225 225 225 225 180 180 225 180 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 6.3 7.0 6.4 7.7 7.6 7.5 6.5 6.7 5.6 6.5 6.2 6.1 7.0 PREVAILING WIND PERCENT 7.7 15.7 18.1 22.0 23.9 18.0 14.8 13.5 11.3 9.7 6.0 6.5 13.5 CALMS PERCENT OF WIND 75.5 65.0 62.6 50.7 47.1 46.7 55.5 52.3 56.0 75.5 78.7 79.4 62.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 223 216 232 229 229 220 215 239 259 220 252 259 230 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.3 2.0 3.1 2.4 2.1 2.0 1.8 1.7 1.1 0.6 0.6 1.6 WIND STEADINESES (MEAN %) 60.0 59.1 74.1 83.8 63.2 52.5 62.5 51.4 54.8 73.3 50.0 50.0 61.5 WIND SPEED (MEAN KNOTS) 1.5 2.2 2.7 3.7 3.8 4.0 3.2 3.5 3.1 1.5 1.2 1.2 2.6 FASTEST WIND DIRECTION 190 220 250 150 80 200 20 110 270 180 250 210 200 FASTEST WIND SPEED (KNOTS) 10 12 18 16 18 25 25 16 15 10 10 12 25 DAY 7 4 14 12 27 24 3 10 22 13 9 23 DAYS WITH SKY CLEAR (0-2)/8 13 24 20 22 29 25 23 22 28 30 27 16 279 DAYS WITH P.CLOUDY (3-6)/8 13 3 8 7 2 5 8 8 2 1 2 11 70 DAYS WITH CLOUDY (7-8)/8 5 1 3 1 0 0 0 1 0 0 1 4 16 DAYS WITH VISIBILITY =< 2 KM 1 0 0 0 2 2 5 2 0 0 0 0 12 DURATION OF SUNSHINE HOURS 201.5 264.4 278.9 197.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 951.5 952.0 950.0 944.1 941.4 935.6 932.1 936.7 942.6 948.5 950.3 952.1 944.7 MAX. QFE PRESSURE IN HPA 960.2 957.7 956.1 950.8 945.7 943.4 938.3 942.0 950.4 955.8 955.8 957.0 960.2 DAY-HOUR 11- 6 15- 6 3- 6 14- 6 1- 6 1- 6 19- 6 31- 6 30- 6 19- 6 2- 6 3- 6 MIN. QFE PRESSURE IN HPA 945.0 947.0 941.8 937.3 935.9 927.6 927.6 930.6 936.6 941.9 944.0 946.2 927.6 DAY-HOUR 23-12 21-12 30-12 8-15 7-15 28-12 29-15 9-15 2-15 4-15 16-12 30-12 MEAN QNH PRESSURE IN HPA 1020.7 1021.2 1019.0 1012.8 1010.0 1003.8 1000.1 1004.9 1011.2 1017.5 1019.4 1021.3 1013.5 MAX. QNH PRESSURE IN HPA 1029.9 1027.2 1025.5 1019.9 1014.5 1012.1 1006.7 1010.6 1019.5 1025.2 1025.2 1026.5 1029.9 DAY-HOUR 11- 6 15- 6 3- 6 14- 6 1- 6 1- 6 19- 6 31- 6 30- 6 19- 6 2- 6 3- 6 MIN. QNH PRESSURE IN HPA 1013.8 1015.9 1010.4 1005.6 1004.1 995.4 995.4 998.5 1004.9 1010.5 1012.7 1015.1 995.4 DAY-HOUR 23-12 21-12 30-12 8-15 7-15 28-12 29-15 9-15 2-15 4-15 16-12 30-12 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 951.9 952.3 950.6 944.9 942.6 937.3 933.6 937.8 943.7 949.4 951.0 952.4 945.6 MAX. QFE PRESSURE IN HPA 957.7 955.6 954.3 948.8 945.0 942.8 937.6 940.7 948.8 954.3 954.4 955.7 957.7 DAY 11 16 7 14 1 1 13 12 30 19 2 3 MIN. QFE PRESSURE IN HPA 946.0 948.6 945.1 941.3 939.9 932.4 930.8 934.2 939.5 945.1 944.9 948.0 930.8 DAY 24 21 30 8 8 29 30 5 3 4 17 30 MEAN QNH PRESSURE IN HPA 1021.1 1021.5 1019.7 1013.6 1011.3 1005.6 1001.7 1006.1 1012.4 1018.5 1020.2 1021.6 1014.4 MAX. QNH PRESSURE IN HPA 1027.2 1025.0 1023.6 1017.8 1013.8 1011.4 1005.9 1009.2 1017.8 1023.6 1023.7 1025.1 1027.2 DAY 11 16 7 14 1 1 13 12 30 19 2 3 MIN. QNH PRESSURE IN HPA 1014.8 1017.6 1013.9 1009.9 1008.4 1000.4 998.7 1002.3 1008.0 1013.9 1013.7 1017.0 998.7 DAY 24 21 30 8 8 29 30 5 3 4 17 30 MEAN QFF PRESSURE IN HPA 1021.2 1021.0 1017.2 1010.4 1006.7 999.9 995.6 1000.7 1008.1 1014.8 1018.0 1020.4 1011.2 MAX. QFF PRESSURE IN HPA 1029.2 1024.8 1022.2 1015.0 1009.6 1006.6 1001.3 1005.2 1013.8 1019.9 1022.2 1024.0 1029.2 DAY 11 16 3 14 1 1 19 12 30 19 28 3 MIN. QFF PRESSURE IN HPA 1014.8 1016.5 1010.6 1006.8 1003.7 994.0 992.6 997.2 1002.7 1010.1 1011.5 1016.1 992.6 DAY 22 21 30 29 8 29 30 5 3 5 17 30 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 953.5 954.2 952.4 946.2 943.8 938.0 934.3 938.9 945.0 951.0 952.4 954.2 947.0 MAX. QFE PRESSURE IN HPA 960.2 957.7 956.1 950.8 945.7 943.4 938.3 942.0 950.4 955.8 955.8 957.0 960.2 DAY 11 15 3 14 1 1 19 31 30 19 2 3 MIN. QFE PRESSURE IN HPA 947.6 950.3 946.8 942.4 940.9 932.9 931.8 935.4 941.4 946.4 945.8 950.3 931.8 DAY 22 21 30 8 7 28 29 5 3 5 17 30 MEAN QNH PRESSURE IN HPA 1022.8 1023.5 1021.6 1015.0 1012.5 1006.4 1002.4 1007.3 1013.8 1020.1 1021.7 1023.5 1015.9 MAX. QNH PRESSURE IN HPA 1029.9 1027.2 1025.5 1019.9 1014.5 1012.1 1006.7 1010.6 1019.5 1025.2 1025.2 1026.5 1029.9 DAY 11 15 3 14 1 1 19 31 30 19 2 3 MIN. QNH PRESSURE IN HPA 1016.5 1019.4 1015.7 1011.0 1009.4 1001.0 999.8 1003.6 1010.0 1015.3 1014.6 1019.4 999.8 DAY 22 21 30 8 7 28 29 5 3 5 17 30 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 951.7 952.9 950.8 944.7 942.0 936.2 932.5 937.2 943.0 948.9 950.3 952.5 945.2 MAX. QFE PRESSURE IN HPA 957.4 956.4 954.5 949.2 944.0 941.2 936.5 940.3 948.2 953.8 953.9 955.2 957.4 DAY 11 15 5 14 1 1 19 31 30 19 28 17 MIN. QFE PRESSURE IN HPA 946.8 949.3 945.1 941.2 939.0 931.4 930.1 934.0 939.0 944.2 944.0 948.5 930.1 DAY 22 21 30 8 7 23 29 5 3 5 17 30 MEAN QNH PRESSURE IN HPA 1020.9 1022.1 1019.9 1013.5 1010.6 1004.5 1000.5 1005.5 1011.7 1017.9 1019.4 1021.7 1014.0 MAX. QNH PRESSURE IN HPA 1026.9 1025.8 1023.8 1018.2 1012.7 1009.8 1004.8 1008.8 1017.2 1023.1 1023.2 1024.6 1026.9 DAY 11 15 5 14 1 1 19 31 30 19 28 17 MIN. QNH PRESSURE IN HPA 1015.7 1018.3 1013.9 1009.8 1007.4 999.4 998.0 1002.1 1007.4 1012.9 1012.7 1017.5 998.0 DAY 22 21 30 8 7 23 29 5 3 5 17 30 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 949.9 950.2 947.9 942.3 939.4 933.3 930.2 934.7 940.7 946.5 948.6 950.6 942.9 MAX. QFE PRESSURE IN HPA 955.7 953.3 952.4 948.5 941.4 939.1 933.6 939.9 946.0 950.4 952.1 953.5 955.7 DAY 11 4 6 22 5 1 31 11 30 19 28 17 MIN. QFE PRESSURE IN HPA 945.0 947.0 941.8 937.7 936.2 927.6 927.8 930.8 936.7 942.0 944.0 946.2 927.6 DAY 23 21 30 8 3 28 29 5 3 5 16 30 MEAN QNH PRESSURE IN HPA 1019.0 1019.3 1016.8 1010.9 1007.8 1001.4 998.1 1002.9 1009.2 1015.3 1017.6 1019.7 1011.5 MAX. QNH PRESSURE IN HPA 1025.1 1022.6 1021.6 1017.5 1010.0 1007.5 1001.7 1008.4 1014.8 1019.5 1021.3 1022.8 1025.1 DAY 11 4 6 22 5 1 31 11 30 19 28 17 MIN. QNH PRESSURE IN HPA 1013.8 1015.9 1010.4 1006.0 1004.5 995.4 995.6 998.7 1005.0 1010.6 1012.7 1015.1 995.4 DAY 23 21 30 8 3 28 29 5 3 5 16 30 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 950.6 950.6 948.4 942.5 939.5 933.2 930.0 934.8 940.6 946.8 949.0 951.1 943.1 MAX. QFE PRESSURE IN HPA 956.6 953.8 952.4 946.5 942.3 939.1 934.7 940.8 945.8 950.9 952.1 954.5 956.6 DAY 11 4 6 14 5 1 18 11 30 19 28 17 MIN. QFE PRESSURE IN HPA 945.6 947.2 942.5 937.3 935.9 927.6 927.6 930.6 936.6 941.9 944.4 947.0 927.6 DAY 23 21 30 8 7 28 29 9 2 4 16 30 MEAN QNH PRESSURE IN HPA 1019.8 1019.8 1017.4 1011.1 1007.9 1001.3 997.9 1003.0 1009.1 1015.7 1018.0 1020.2 1011.8 MAX. QNH PRESSURE IN HPA 1026.1 1023.1 1021.6 1015.4 1010.9 1007.5 1002.9 1009.3 1014.6 1020.0 1021.3 1023.8 1026.1 DAY 11 4 6 14 5 1 18 11 30 19 28 17 MIN. QNH PRESSURE IN HPA 1014.4 1016.1 1011.1 1005.6 1004.1 995.4 995.4 998.5 1004.9 1010.5 1013.1 1015.9 995.4 DAY 23 21 30 8 7 28 29 9 2 4 16 30 MEAN QFF PRESSURE IN HPA 1019.9 1019.1 1014.9 1007.9 1003.3 995.6 992.1 997.7 1004.8 1012.0 1015.8 1018.9 1008.5 MAX. QFF PRESSURE IN HPA 1028.1 1023.7 1019.8 1012.3 1006.7 1002.7 998.3 1005.0 1010.5 1016.3 1020.1 1022.8 1028.1 DAY 11 4 6 1 5 1 18 11 30 19 28 31 MIN. QFF PRESSURE IN HPA 1014.3 1014.6 1007.8 1002.7 999.4 989.0 989.2 993.1 999.4 1006.4 1011.0 1015.1 989.0 DAY 22 21 30 8 7 28 29 9 2 4 16 8 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 14.8 17.0 20.7 28.0 32.8 39.6 ***** ***** ***** ***** ***** ***** ***** MINIMUN AIR TEMPERATURE (C) 7.2 10.4 12.8 19.7 22.5 28.8 ***** ***** ***** ***** ***** ***** ***** DAYS WITH MINIMUM TEMP. >=21 0 0 0 12 21 30 **** **** **** **** **** **** **** DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 **** **** **** **** **** **** **** DAYS WITH FREEZING MIN.<= 0 1 0 0 0 0 0 **** **** **** **** **** **** **** TEMPERATURE RECORDS LOWEST(C) 0.0 4.0 9.0 15.0 18.0 24.0 ***** ***** ***** ***** ***** ***** ***** DAY 15 7 10 3 5 10 ** ** ** ** ** ** MAXIMUM AIR TEMPERATURE (C) 22.9 24.2 29.2 36.7 42.0 45.5 ***** ***** ***** ***** ***** ***** ***** DAYS WITH MAXIMUM TEMP. >=30 0 0 16 30 31 30 **** **** **** **** **** **** **** DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 **** **** **** **** **** **** **** TEMPERATURE RECORDS HIGHEST(C) 27.0 28.0 35.0 41.0 45.0 49.0 ***** ***** ***** ***** ***** ***** ***** DAY 26 20 29 24 16 7 ** ** ** ** ** ** DIF. BETWEEN (MAX.-MIN.) (C) 15.7 13.8 16.4 17.0 19.5 16.7 ***** ***** ***** ***** ***** ***** ***** MEAN DAILY TEMP. (MDT) (C) 15.1 17.3 21.0 28.2 32.3 37.2 ***** ***** ***** ***** ***** ***** ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 31.0 215.5 349.0 485.0 ****** ****** ****** ****** ****** ****** ****** HEATING DEG. DAYS(BASE 18 0C) 94.5 40.0 2.5 0.0 0.0 0.0 ****** ****** ****** ****** ****** ****** ****** DEWPOINT (MEAN C) 3.8 7.0 6.5 10.7 14.4 19.4 ***** ***** ***** ***** ***** ***** ***** MIXING RATIO (G/KG) 5.54 6.89 6.56 8.71 11.50 15.65 ****** ****** ****** ****** ****** ****** ****** VAPOUR PRESSURE (HPA) 8.40 10.41 9.88 13.04 17.04 22.93 ****** ****** ****** ****** ****** ****** ****** SATURATION DEF. (HPA) 11.84 12.26 19.80 32.64 43.78 51.67 ****** ****** ****** ****** ****** ****** ****** RELATIVE HUMIDITY (MEAN %) 45 51 38 31 30 33 *** *** *** *** *** *** *** RELATIVE HUMIDITY (MAX. %) 65 73 61 49 45 47 *** *** *** *** *** *** *** RELATIVE HUMIDITY (MIN. %) 30 36 25 21 23 25 *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 03UTC) 62 71 59 48 45 46 *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 09UTC) 36 41 28 25 25 28 *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 15UTC) 43 47 35 29 28 30 *** *** *** *** *** *** *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 2.0 31.2 2.6 0.0 0.0 0.0 ****** ****** ****** ****** ****** ****** ****** DAYS WITH PRECIPITATION >=10 0 2 0 0 0 0 **** **** **** **** **** **** **** DAYS WITH PRECIPITATION >= 5 0 3 0 0 0 0 **** **** **** **** **** **** **** DAYS WITH PRECIPITATION >= 1 1 3 1 0 0 0 **** **** **** **** **** **** **** DAYS WITH PRECIPITATION 1 4 2 0 0 0 **** **** **** **** **** **** **** GREATEST DAILY PRECIPITATION 2.0 13.0 2.0 0.0 0.0 0.0 ****** ****** ****** ****** ****** ****** ****** DAY 13 10 8 ** ** ** ** ** ** ** ** ** DAY WITH THUNDER STORM 0 0 0 0 0 0 **** **** **** **** **** **** **** DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 **** **** **** **** **** **** **** DAYS WITH DUST 3 3 11 8 2 11 **** **** **** **** **** **** **** WIND DIRECTION (PREVAILING) 225 225 225 225 225 225 *** *** *** *** *** *** *** PREVAILING WIND SPEED(KNOTS) 9.4 7.0 10.7 7.5 6.9 7.9 **** **** **** **** **** **** **** PREVAILING WIND PERCENT 11.6 11.4 14.2 24.7 20.6 23.3 ***** ***** ***** ***** ***** ***** ***** CALMS PERCENT OF WIND 77.4 75.7 71.6 53.3 59.4 48.0 ***** ***** ***** ***** ***** ***** ***** NO. OF WIND OBSERVATION 155 140 155 150 155 150 **** **** **** **** **** **** 905 VECTOR WIND DIRECTION (MEAN) 221 219 242 241 223 228 *** *** *** *** *** *** *** VECTOR WIND MAGNITUDE(KNOTS) 1.4 1.4 2.7 2.9 2.3 3.5 **** **** **** **** **** **** **** WIND STEADINESES (MEAN %) 82.4 73.7 87.1 74.4 82.1 81.4 ***** ***** ***** ***** ***** ***** ***** WIND SPEED (MEAN KNOTS) 1.7 1.9 3.1 3.9 2.8 4.3 **** **** **** **** **** **** **** FASTEST WIND DIRECTION 210 250 230 320 180 240 *** *** *** *** *** *** *** FASTEST WIND SPEED (KNOTS) 25 22 25 22 20 25 *** *** *** *** *** *** *** DAY 12 25 7 1 2 2 ** ** ** ** ** ** DAYS WITH SKY CLEAR (0-2)/8 25 15 19 13 31 18 **** **** **** **** **** **** **** DAYS WITH P.CLOUDY (3-6)/8 6 9 10 14 0 12 **** **** **** **** **** **** **** DAYS WITH CLOUDY (7-8)/8 0 4 2 3 0 0 **** **** **** **** **** **** **** DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 2 2 **** **** **** **** **** **** **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 952.7 951.2 947.6 944.4 941.0 935.4 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 960.0 957.5 953.4 953.0 949.0 942.0 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 1- 6 1- 6 2- 6 6- 6 2- 6 3- 6 **-** **-** **-** **-** **-** **-** MIN. QFE PRESSURE IN HPA 946.3 946.1 942.4 938.4 931.2 929.8 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 26-12 12-12 15-12 20-12 30-15 25-12 **-** **-** **-** **-** **-** **-** MEAN QNH PRESSURE IN HPA 1021.9 1020.3 1016.5 1013.2 1009.6 1003.7 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.7 1027.0 1022.7 1022.2 1018.0 1010.6 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 1- 6 1- 6 2- 6 6- 6 2- 6 3- 6 **-** **-** **-** **-** **-** **-** MIN. QNH PRESSURE IN HPA 1015.2 1014.9 1011.0 1006.8 999.2 997.7 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 26-12 12-12 15-12 20-12 30-15 25-12 **-** **-** **-** **-** **-** **-** 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 952.9 951.5 948.1 945.2 941.9 936.4 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 958.0 955.3 951.4 951.0 947.6 940.4 ****** ****** ****** ****** ****** ****** ****** DAY 2 1 2 6 2 4 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 948.0 948.0 945.8 940.5 937.4 932.6 ****** ****** ****** ****** ****** ****** ****** DAY 27 12 16 20 30 26 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1022.1 1020.7 1017.1 1014.0 1010.5 1004.6 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1027.5 1024.7 1020.6 1020.1 1016.5 1008.9 ****** ****** ****** ****** ****** ****** ****** DAY 2 1 2 6 2 4 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1017.0 1017.0 1014.6 1009.0 1005.7 1000.6 ****** ****** ****** ****** ****** ****** ****** DAY 27 12 16 20 30 26 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1021.8 1019.6 1015.2 1010.3 1005.8 998.6 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1027.8 1024.7 1019.5 1017.0 1013.2 1003.5 ****** ****** ****** ****** ****** ****** ****** DAY 2 7 9 6 2 4 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1015.4 1016.0 1011.9 1005.2 1000.6 994.0 ****** ****** ****** ****** ****** ****** ****** DAY 27 12 15 20 30 26 ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 954.9 953.3 950.1 946.9 943.5 938.0 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 960.0 957.5 953.4 953.0 949.0 942.0 ****** ****** ****** ****** ****** ****** ****** DAY 1 1 2 6 2 3 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 950.0 950.0 947.2 942.4 939.1 934.0 ****** ****** ****** ****** ****** ****** ****** DAY 26 12 15 20 30 25 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1024.2 1022.6 1019.2 1015.7 1012.2 1006.3 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.7 1027.0 1022.7 1022.2 1018.0 1010.6 ****** ****** ****** ****** ****** ****** ****** DAY 1 1 2 6 2 3 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1019.1 1019.1 1016.1 1011.0 1007.5 1002.1 ****** ****** ****** ****** ****** ****** ****** DAY 26 12 15 20 30 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 953.1 951.7 948.0 944.8 941.3 936.0 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 957.7 955.5 951.0 950.6 947.1 940.4 ****** ****** ****** ****** ****** ****** ****** DAY 1 1 2 6 2 4 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 948.5 948.2 944.9 940.2 935.8 931.8 ****** ****** ****** ****** ****** ****** ****** DAY 27 12 15 20 30 25 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1022.3 1020.9 1016.9 1013.6 1009.9 1004.2 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1027.2 1024.9 1020.1 1019.7 1016.0 1008.9 ****** ****** ****** ****** ****** ****** ****** DAY 1 1 2 6 2 4 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1017.5 1017.2 1013.7 1008.7 1004.0 999.8 ****** ****** ****** ****** ****** ****** ****** DAY 27 12 15 20 30 25 ** ** ** ** ** ** 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 951.0 949.6 945.7 942.5 939.2 933.5 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 956.0 953.0 949.0 947.6 944.5 937.6 ****** ****** ****** ****** ****** ****** ****** DAY 1 1 2 6 2 3 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 946.3 946.1 942.4 938.4 933.1 929.8 ****** ****** ****** ****** ****** ****** ****** DAY 26 12 15 20 30 25 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1020.1 1018.7 1014.6 1011.1 1007.6 1001.6 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1025.4 1022.2 1018.0 1016.5 1013.2 1005.9 ****** ****** ****** ****** ****** ****** ****** DAY 1 1 2 6 2 3 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1015.2 1014.9 1011.0 1006.8 1001.2 997.7 ****** ****** ****** ****** ****** ****** ****** DAY 26 12 15 20 30 25 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 951.5 949.9 946.1 942.8 939.2 933.5 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 956.7 953.1 949.6 948.0 945.1 937.6 ****** ****** ****** ****** ****** ****** ****** DAY 1 6 2 6 2 3 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 947.1 946.5 942.9 938.4 931.2 929.8 ****** ****** ****** ****** ****** ****** ****** DAY 26 12 15 20 30 25 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1020.7 1019.0 1014.9 1011.5 1007.7 1001.6 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1026.2 1022.4 1018.6 1017.0 1013.9 1005.9 ****** ****** ****** ****** ****** ****** ****** DAY 1 6 2 6 2 3 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1016.0 1015.4 1011.6 1006.8 999.2 997.7 ****** ****** ****** ****** ****** ****** ****** DAY 26 12 15 20 30 25 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1020.3 1017.9 1013.0 1007.8 1002.8 995.4 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1026.5 1022.4 1017.2 1013.6 1010.2 1000.2 ****** ****** ****** ****** ****** ****** ****** DAY 1 7 2 6 2 3 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1014.6 1014.3 1009.0 1002.7 993.5 991.1 ****** ****** ****** ****** ****** ****** ****** DAY 26 12 15 20 30 25 ** ** ** ** ** ** 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** 29.5 20.5 17.1 ***** MINIMUN AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** 20.6 11.0 10.2 ***** DAYS WITH MINIMUM TEMP. >=21 **** **** **** **** **** **** **** **** **** 11 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** **** **** **** **** **** **** **** **** 0 0 0 **** DAYS WITH FREEZING MIN.<= 0 **** **** **** **** **** **** **** **** **** 0 0 0 **** TEMPERATURE RECORDS LOWEST(C) ***** ***** ***** ***** ***** ***** ***** ***** ***** 19.0 4.0 7.0 ***** DAY ** ** ** ** ** ** ** ** ** 26 23 23 MAXIMUM AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** 37.0 30.3 24.8 ***** DAYS WITH MAXIMUM TEMP. >=30 **** **** **** **** **** **** **** **** **** 23 15 0 **** DAYS WITH MAXIMUM TEMP. <= 0 **** **** **** **** **** **** **** **** **** 0 0 0 **** TEMPERATURE RECORDS HIGHEST(C)***** ***** ***** ***** ***** ***** ***** ***** ***** 42.0 36.0 29.0 ***** DAY ** ** ** ** ** ** ** ** ** 9 3 1 DIF. BETWEEN (MAX.-MIN.) (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** 16.4 19.3 14.6 ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** 28.8 20.6 17.5 ***** COOLING DEG. DAYS(BASE 21 0C)****** ****** ****** ****** ****** ****** ****** ****** ****** 179.0 53.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C)****** ****** ****** ****** ****** ****** ****** ****** ****** 0.0 17.0 36.5 ****** DEWPOINT (MEAN C) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 1.2 6.3 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 5.05 6.52 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 7.65 9.87 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 22.71 13.20 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** *** *** *** *** 26 48 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** *** *** *** *** 57 43 65 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** *** *** *** *** 26 18 36 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** *** *** *** 57 43 63 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** *** *** *** 28 19 40 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** *** *** *** *** 32 26 48 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** ****** ****** ****** ****** ****** ****** ****** 9.0 0.0 52.2 ****** DAYS WITH PRECIPITATION >=10 **** **** **** **** **** **** **** **** **** 0 0 2 **** DAYS WITH PRECIPITATION >= 5 **** **** **** **** **** **** **** **** **** 1 0 2 **** DAYS WITH PRECIPITATION >= 1 **** **** **** **** **** **** **** **** **** 2 0 3 **** DAYS WITH PRECIPITATION **** **** **** **** **** **** **** **** **** 2 0 5 **** GREATEST DAILY PRECIPITATION ****** ****** ****** ****** ****** ****** ****** ****** ****** 7.0 0.0 29.0 ****** DAY ** ** ** ** ** ** ** ** ** 28 ** 21 DAY WITH THUNDER STORM **** **** **** **** **** **** **** **** **** 0 0 0 **** DAYS WITH SNOW OR SLEET **** **** **** **** **** **** **** **** **** 0 0 0 **** DAYS WITH DUST **** **** **** **** **** **** **** **** **** 0 6 1 **** WIND DIRECTION (PREVAILING) *** *** *** *** *** *** *** *** *** *** 225 270 *** PREVAILING WIND SPEED(KNOTS) **** **** **** **** **** **** **** **** **** **** 5.6 5.8 **** PREVAILING WIND PERCENT ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 11.3 8.4 ***** CALMS PERCENT OF WIND ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 79.3 66.5 ***** NO. OF WIND OBSERVATION **** **** **** **** **** **** **** **** **** 115 150 155 420 VECTOR WIND DIRECTION (MEAN) *** *** *** *** *** *** *** *** *** *** 250 243 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** **** **** **** **** **** **** **** 1.1 0.4 **** WIND STEADINESES (MEAN %) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 78.6 19.0 ***** WIND SPEED (MEAN KNOTS) **** **** **** **** **** **** **** **** **** **** 1.4 2.1 **** FASTEST WIND DIRECTION *** *** *** *** *** *** *** *** *** *** 270 150 *** FASTEST WIND SPEED (KNOTS) *** *** *** *** *** *** *** *** *** *** 18 16 *** DAY ** ** ** ** ** ** ** ** ** ** 11 16 DAYS WITH SKY CLEAR (0-2)/8 **** **** **** **** **** **** **** **** **** 18 28 16 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** **** **** **** **** **** **** 5 2 11 **** DAYS WITH CLOUDY (7-8)/8 **** **** **** **** **** **** **** **** **** 0 0 4 **** DAYS WITH VISIBILITY =< 2 KM **** **** **** **** **** **** **** **** **** 0 1 0 **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 952.8 953.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 959.8 959.0 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 25- 6 23- 6 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 946.8 945.8 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2-12 30- 9 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1022.0 1022.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1029.4 1028.6 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 25- 6 23- 6 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.7 1014.6 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2-12 30- 9 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** 951.6 953.9 953.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 954.1 959.0 958.7 ****** DAY ** ** ** ** ** ** ** ** ** 21 25 23 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 948.8 949.7 949.5 ****** DAY ** ** ** ** ** ** ** ** ** 27 5 30 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.7 1023.2 1022.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.4 1028.6 1028.3 ****** DAY ** ** ** ** ** ** ** ** ** 21 25 23 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1017.8 1018.8 1018.5 ****** DAY ** ** ** ** ** ** ** ** ** 27 5 30 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.9 1021.7 1021.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.7 1028.9 1028.7 ****** DAY ** ** ** ** ** ** ** ** ** 21 25 23 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.9 1015.6 1017.4 ****** DAY ** ** ** ** ** ** ** ** ** 27 2 30 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 952.6 955.0 954.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 955.7 959.8 959.0 ****** DAY ** ** ** ** ** ** ** ** ** 25 25 23 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 949.8 951.0 948.8 ****** DAY ** ** ** ** ** ** ** ** ** 27 2 30 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1021.8 1024.4 1024.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.1 1029.4 1028.6 ****** DAY ** ** ** ** ** ** ** ** ** 25 25 23 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1018.9 1020.1 1017.8 ****** DAY ** ** ** ** ** ** ** ** ** 27 2 30 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** 950.7 953.0 953.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 953.8 958.7 957.7 ****** DAY ** ** ** ** ** ** ** ** ** 25 25 23 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 947.8 949.1 945.8 ****** DAY ** ** ** ** ** ** ** ** ** 27 2 30 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.9 1022.3 1022.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.1 1028.3 1027.2 ****** DAY ** ** ** ** ** ** ** ** ** 25 25 23 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.7 1018.1 1014.6 ****** DAY ** ** ** ** ** ** ** ** ** 27 2 30 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** 948.6 951.0 951.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 951.6 956.3 955.6 ****** DAY ** ** ** ** ** ** ** ** ** 25 25 23 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 945.0 946.8 945.8 ****** DAY ** ** ** ** ** ** ** ** ** 27 2 30 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1017.5 1020.1 1020.7 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.8 1025.7 1025.0 ****** DAY ** ** ** ** ** ** ** ** ** 25 25 23 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.8 1015.7 1014.6 ****** DAY ** ** ** ** ** ** ** ** ** 27 2 30 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 948.7 951.2 951.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 951.6 956.6 956.1 ****** DAY ** ** ** ** ** ** ** ** ** 25 25 23 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 946.0 946.8 946.6 ****** DAY ** ** ** ** ** ** ** ** ** 27 2 30 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1017.7 1020.4 1021.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.8 1026.1 1025.5 ****** DAY ** ** ** ** ** ** ** ** ** 25 25 23 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.8 1015.7 1015.5 ****** DAY ** ** ** ** ** ** ** ** ** 27 2 30 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.8 1018.9 1020.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.9 1026.3 1025.5 ****** DAY ** ** ** ** ** ** ** ** ** 25 25 23 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1010.7 1012.2 1014.6 ****** DAY ** ** ** ** ** ** ** ** ** 27 2 30 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 15.1 17.7 22.3 30.3 33.4 38.1 37.7 36.6 32.7 29.3 22.4 17.7 27.8 MINIMUN AIR TEMPERATURE (C) 8.4 11.0 14.3 21.9 24.8 30.2 29.4 28.9 24.2 20.7 14.6 10.8 19.9 DAYS WITH MINIMUM TEMP. >=21 0 0 1 24 31 30 31 31 29 16 0 0 193 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 2 0 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS LOWEST(C) 5.0 0.0 8.0 18.0 23.0 26.0 27.0 24.0 20.0 14.0 9.0 7.0 0.0 DAY 2 3 6 21 8 5 2 28 13 31 27 22 MAXIMUM AIR TEMPERATURE (C) 23.2 25.9 30.5 38.9 42.1 46.7 46.5 44.2 41.3 37.5 30.8 26.6 36.2 DAYS WITH MAXIMUM TEMP. >=30 0 5 18 30 31 30 31 31 30 30 23 2 261 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 28.0 32.0 38.0 42.0 45.0 49.0 48.0 46.0 44.0 44.0 35.0 33.0 49.0 DAY 23 25 30 29 27 10 4 1 3 6 15 8 DIF. BETWEEN (MAX.-MIN.) (C) 14.8 14.9 16.2 17.0 17.3 16.5 17.1 15.3 17.1 16.8 16.2 15.8 16.3 MEAN DAILY TEMP. (MDT) (C) 15.8 18.5 22.4 30.4 33.4 38.5 37.9 36.5 32.7 29.1 22.7 18.7 28.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 10.0 65.5 281.5 385.0 524.5 524.0 481.0 352.5 251.5 57.0 1.0 2933.5 HEATING DEG. DAYS(BASE 18 0C) 72.5 41.5 2.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 13.5 130.0 DEWPOINT (MEAN C) 5.8 6.7 9.3 11.3 14.1 14.2 16.3 15.5 13.7 11.7 7.6 6.5 11.1 MIXING RATIO (G/KG) 6.27 6.93 8.14 9.09 11.23 11.55 13.18 12.27 10.80 9.36 7.06 6.65 9.38 VAPOUR PRESSURE (HPA) 9.50 10.46 12.24 13.63 16.69 17.05 19.38 18.12 16.09 14.04 10.69 10.06 14.00 SATURATION DEF. (HPA) 10.75 13.68 20.15 37.38 44.19 60.91 57.07 51.10 41.58 34.12 21.45 14.25 33.89 RELATIVE HUMIDITY (MEAN %) 51 47 42 29 30 24 27 28 30 33 36 45 35 RELATIVE HUMIDITY (MAX. %) 76 69 65 43 44 37 40 43 43 46 53 60 52 RELATIVE HUMIDITY (MIN. %) 35 32 30 21 22 17 20 19 22 25 27 34 25 RELATIVE HUMIDITY (MEAN% 03UTC) 76 68 65 43 43 37 40 43 43 46 53 60 51 RELATIVE HUMIDITY (MEAN% 09UTC) 41 37 36 24 25 19 23 23 24 26 29 37 29 RELATIVE HUMIDITY (MEAN% 15UTC) 47 43 34 25 27 19 21 23 27 30 34 45 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 4.5 29.0 24.0 0.0 0.0 0.0 0.0 0.4 0.0 12.0 0.0 9.9 79.8 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 1 0 0 2 DAYS WITH PRECIPITATION >= 5 0 2 2 0 0 0 0 0 0 1 0 0 5 DAYS WITH PRECIPITATION >= 1 1 3 5 0 0 0 0 0 0 2 0 4 15 DAYS WITH PRECIPITATION 4 3 7 0 0 1 0 1 0 2 0 5 23 GREATEST DAILY PRECIPITATION 3.0 23.0 7.4 0.0 0.0 0.0 0.0 0.4 0.0 10.0 0.0 4.0 23.0 DAY 15 12 2 ** ** ** ** 4 ** 31 ** 10 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 5 11 11 9 9 8 11 3 7 2 3 2 81 WIND DIRECTION (PREVAILING) 225 270 225 225 225 270 270 270 225 270 315 315 270 PREVAILING WIND SPEED(KNOTS) 7.8 7.8 7.7 7.4 8.0 9.4 10.8 7.5 6.8 8.1 12.3 9.9 8.8 PREVAILING WIND PERCENT 12.3 18.6 18.1 17.3 18.1 18.0 25.2 21.3 15.3 12.3 5.3 6.5 13.4 CALMS PERCENT OF WIND 63.2 46.9 51.6 58.7 61.3 47.3 45.2 41.9 52.0 67.1 85.3 80.0 58.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 240 258 251 237 246 268 281 274 268 251 298 298 263 VECTOR WIND MAGNITUDE(KNOTS) 1.0 2.5 2.0 2.6 2.8 2.5 4.3 3.6 2.9 1.7 1.0 0.9 2.2 WIND STEADINESES (MEAN %) 40.0 59.5 54.1 76.5 87.5 56.8 76.8 76.6 74.4 73.9 76.9 56.3 64.7 WIND SPEED (MEAN KNOTS) 2.5 4.2 3.7 3.4 3.2 4.4 5.6 4.7 3.9 2.3 1.3 1.6 3.4 FASTEST WIND DIRECTION 230 180 260 200 250 270 280 280 330 320 320 330 200 FASTEST WIND SPEED (KNOTS) 17 20 18 25 22 20 20 18 20 16 20 20 25 DAY 24 26 1 5 14 4 13 12 11 26 17 21 DAYS WITH SKY CLEAR (0-2)/8 19 11 18 20 22 23 26 26 30 28 25 18 266 DAYS WITH P.CLOUDY (3-6)/8 8 13 9 9 8 6 5 5 0 3 5 11 82 DAYS WITH CLOUDY (7-8)/8 4 5 4 1 1 1 0 0 0 0 0 2 18 DAYS WITH VISIBILITY =< 2 KM 0 0 0 1 0 0 0 0 0 1 1 0 3 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 952.5 951.2 949.0 946.5 942.7 937.2 935.8 937.5 943.6 947.8 952.4 952.1 945.7 MAX. QFE PRESSURE IN HPA 957.8 957.3 953.7 953.0 947.7 943.9 941.5 943.8 950.8 955.2 957.9 957.8 957.9 DAY-HOUR 20- 6 22- 6 12- 6 21- 6 1- 6 2- 6 18- 6 31- 6 25- 6 31- 6 12- 6 4- 6 MIN. QFE PRESSURE IN HPA 945.6 942.4 940.0 940.2 937.0 931.2 931.2 932.4 938.0 943.0 946.0 946.4 931.2 DAY-HOUR 24-12 29-12 2-15 11-12 28-12 29-15 3-15 7-12 9-12 4-12 20-12 8-12 MEAN QNH PRESSURE IN HPA 1021.7 1020.3 1018.0 1015.4 1011.3 1005.5 1004.1 1005.8 1012.3 1016.8 1021.6 1021.3 1014.5 MAX. QNH PRESSURE IN HPA 1027.3 1026.8 1023.0 1022.2 1016.6 1012.6 1010.1 1012.5 1019.9 1024.6 1027.4 1027.3 1027.4 DAY-HOUR 20- 6 22- 6 12- 6 21- 6 1- 6 2- 6 18- 6 31- 6 25- 6 31- 6 12- 6 4- 6 MIN. QNH PRESSURE IN HPA 1014.4 1011.0 1008.5 1008.7 1005.3 999.2 999.2 1000.4 1006.4 1011.7 1014.8 1015.3 999.2 DAY-HOUR 24-12 29-12 2-15 11-12 28-12 29-15 3-15 7-12 9-12 4-12 20-12 8-12 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 952.8 951.8 949.7 947.6 943.9 938.5 937.1 938.8 944.7 949.0 953.4 952.7 946.7 MAX. QFE PRESSURE IN HPA 956.3 956.4 952.9 951.6 946.7 943.1 940.7 942.8 949.6 953.6 956.7 956.6 956.7 DAY 20 22 15 21 1 3 18 31 25 31 12 4 MIN. QFE PRESSURE IN HPA 948.7 945.0 942.4 943.4 940.6 934.8 934.5 936.0 941.0 946.0 949.0 949.0 934.5 DAY 25 29 3 11 18 29 3 2 3 5 15 9 MEAN QNH PRESSURE IN HPA 1022.0 1021.0 1018.7 1016.5 1012.6 1006.9 1005.4 1007.2 1013.4 1018.0 1022.6 1021.9 1015.5 MAX. QNH PRESSURE IN HPA 1025.7 1025.8 1022.1 1020.8 1015.6 1011.8 1009.2 1011.4 1018.6 1022.9 1026.2 1026.1 1026.2 DAY 20 22 15 21 1 3 18 31 25 31 12 4 MIN. QNH PRESSURE IN HPA 1017.7 1013.8 1011.0 1012.1 1009.1 1003.0 1002.7 1004.2 1009.5 1014.8 1018.0 1018.0 1002.7 DAY 25 29 3 11 18 29 3 2 3 5 15 9 MEAN QFF PRESSURE IN HPA 1021.6 1019.9 1016.3 1012.4 1007.6 1000.8 999.3 1001.4 1008.7 1014.0 1020.5 1020.8 1011.9 MAX. QFF PRESSURE IN HPA 1025.9 1026.9 1020.5 1017.4 1010.5 1005.9 1003.0 1005.8 1014.1 1020.4 1024.8 1024.8 1026.9 DAY 20 3 5 21 1 3 18 31 25 31 27 4 MIN. QFF PRESSURE IN HPA 1016.0 1012.1 1008.4 1008.0 1003.5 996.5 996.8 997.8 1004.9 1010.0 1015.6 1016.7 996.5 DAY 25 29 3 11 28 29 3 2 3 5 15 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 954.2 952.9 950.8 948.6 944.8 939.3 937.8 939.7 945.6 950.1 954.5 954.3 947.7 MAX. QFE PRESSURE IN HPA 957.8 957.3 953.7 953.0 947.7 943.9 941.5 943.8 950.8 955.2 957.9 957.8 957.9 DAY 20 22 12 21 1 2 18 31 25 31 12 4 MIN. QFE PRESSURE IN HPA 950.0 946.6 944.2 944.4 941.5 935.1 934.9 937.0 941.5 947.0 949.5 950.4 934.9 DAY 24 29 3 11 28 29 3 7 3 11 15 10 MEAN QNH PRESSURE IN HPA 1023.6 1022.2 1019.9 1017.6 1013.5 1007.8 1006.1 1008.2 1014.4 1019.2 1023.9 1023.6 1016.7 MAX. QNH PRESSURE IN HPA 1027.3 1026.8 1023.0 1022.2 1016.6 1012.6 1010.1 1012.5 1019.9 1024.6 1027.4 1027.3 1027.4 DAY 20 22 12 21 1 2 18 31 25 31 12 4 MIN. QNH PRESSURE IN HPA 1019.1 1015.5 1012.9 1013.1 1010.1 1003.3 1003.1 1005.3 1010.1 1015.9 1018.5 1019.5 1003.1 DAY 24 29 3 11 28 29 3 7 3 11 15 10 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 952.9 951.5 949.6 946.9 943.1 937.5 936.1 937.7 944.0 948.3 952.7 952.3 946.1 MAX. QFE PRESSURE IN HPA 956.3 956.0 952.5 951.0 946.5 942.9 940.1 942.3 949.3 953.2 956.7 956.0 956.7 DAY 20 22 15 21 2 2 18 31 26 31 11 4 MIN. QFE PRESSURE IN HPA 948.0 944.6 942.4 942.2 939.1 933.7 933.0 935.0 940.3 945.6 948.3 948.5 933.0 DAY 24 29 2 11 28 29 3 7 3 5 15 10 MEAN QNH PRESSURE IN HPA 1022.1 1020.7 1018.7 1015.8 1011.8 1005.9 1004.3 1006.1 1012.7 1017.3 1021.9 1021.6 1014.9 MAX. QNH PRESSURE IN HPA 1025.7 1025.4 1021.7 1020.1 1015.4 1011.6 1008.6 1010.9 1018.3 1022.5 1026.2 1025.4 1026.2 DAY 20 22 15 21 2 2 18 31 26 31 11 4 MIN. QNH PRESSURE IN HPA 1017.0 1013.4 1011.0 1010.8 1007.5 1001.8 1001.1 1003.2 1008.8 1014.4 1017.3 1017.5 1001.1 DAY 24 29 2 11 28 29 3 7 3 5 15 10 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 951.1 949.7 947.5 944.7 940.7 935.3 934.1 935.5 941.7 945.8 950.6 950.3 943.9 MAX. QFE PRESSURE IN HPA 954.0 954.0 951.2 948.8 944.1 939.8 938.1 940.0 947.1 951.1 954.4 953.7 954.4 DAY 19 22 20 21 2 2 18 31 26 31 11 13 MIN. QFE PRESSURE IN HPA 945.6 942.4 940.4 940.2 937.0 932.0 931.2 932.4 938.0 943.0 946.0 946.4 931.2 DAY 24 29 2 11 28 29 26 7 9 4 20 8 MEAN QNH PRESSURE IN HPA 1020.2 1018.7 1016.4 1013.5 1009.3 1003.5 1002.3 1003.7 1010.3 1014.6 1019.7 1019.4 1012.6 MAX. QNH PRESSURE IN HPA 1023.3 1023.3 1020.3 1017.8 1012.8 1008.3 1006.5 1008.5 1016.0 1020.2 1023.7 1023.0 1023.7 DAY 19 22 20 21 2 2 18 31 26 31 11 13 MIN. QNH PRESSURE IN HPA 1014.4 1011.0 1008.9 1008.7 1005.3 1000.0 999.2 1000.4 1006.4 1011.7 1014.8 1015.3 999.2 DAY 24 29 2 11 28 29 26 7 9 4 20 8 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 951.5 950.1 947.6 944.8 940.9 935.3 934.2 935.8 942.0 946.1 950.8 950.9 944.2 MAX. QFE PRESSURE IN HPA 955.1 954.0 951.4 948.8 944.1 939.8 938.1 940.0 947.1 952.2 954.6 954.4 955.1 DAY 19 22 20 20 2 2 18 31 26 31 12 13 MIN. QFE PRESSURE IN HPA 947.0 943.0 940.0 940.2 937.3 931.2 931.2 932.4 938.4 943.0 946.0 947.2 931.2 DAY 24 29 2 11 17 29 3 7 9 4 20 8 MEAN QNH PRESSURE IN HPA 1020.7 1019.2 1016.5 1013.5 1009.4 1003.5 1002.3 1004.0 1010.6 1014.9 1019.9 1020.1 1012.9 MAX. QNH PRESSURE IN HPA 1024.5 1023.3 1020.6 1017.8 1012.8 1008.3 1006.5 1008.5 1016.0 1021.4 1023.9 1023.7 1024.5 DAY 19 22 20 20 2 2 18 31 26 31 12 13 MIN. QNH PRESSURE IN HPA 1015.9 1011.7 1008.5 1008.7 1005.6 999.2 999.2 1000.4 1006.8 1011.7 1014.8 1016.1 999.2 DAY 24 29 2 11 17 29 3 7 9 4 20 8 MEAN QFF PRESSURE IN HPA 1020.2 1018.0 1014.1 1009.3 1004.3 997.3 996.2 998.2 1005.7 1011.0 1017.6 1018.9 1009.2 MAX. QFF PRESSURE IN HPA 1024.5 1024.4 1018.1 1014.3 1007.8 1002.5 1000.1 1002.9 1010.7 1019.4 1023.0 1022.3 1024.5 DAY 19 4 20 21 2 2 18 31 29 31 27 13 MIN. QFF PRESSURE IN HPA 1014.4 1009.9 1006.0 1004.8 1000.5 992.8 993.0 994.2 1001.7 1006.9 1012.2 1014.5 992.8 DAY 24 29 2 11 28 29 26 7 9 4 20 8 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 15.9 17.9 22.5 28.6 32.6 36.1 37.5 35.7 31.7 26.5 21.5 17.3 27.0 MINIMUN AIR TEMPERATURE (C) 9.5 11.3 16.1 21.4 25.3 28.7 31.2 28.0 23.6 17.6 12.6 9.3 19.5 DAYS WITH MINIMUM TEMP. >=21 0 0 2 17 28 30 31 31 28 6 0 0 173 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 4.0 5.0 11.0 16.0 19.0 25.0 26.0 25.0 18.0 11.0 8.0 8.0 4.0 DAY 9 5 6 4 1 17 31 2 30 31 3 1 MAXIMUM AIR TEMPERATURE (C) 23.9 26.4 30.8 37.0 41.1 44.6 45.2 44.2 40.9 35.3 30.4 26.8 35.5 DAYS WITH MAXIMUM TEMP. >=30 0 6 21 29 31 30 31 31 30 31 21 0 261 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.0 33.0 38.0 42.0 47.0 49.0 49.0 47.0 43.0 39.0 33.0 29.0 49.0 DAY 3 20 25 11 24 30 1 15 16 1 5 19 DIF. BETWEEN (MAX.-MIN.) (C) 14.4 15.1 14.7 15.6 15.8 15.9 14.0 16.2 17.3 17.7 17.8 17.5 16.0 MEAN DAILY TEMP. (MDT) (C) 16.7 18.8 23.5 29.2 33.2 36.6 38.2 36.1 32.2 26.5 21.5 18.0 27.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 7.0 89.5 246.0 378.0 469.5 533.0 467.5 337.5 169.5 41.0 0.0 2738.5 HEATING DEG. DAYS(BASE 18 0C) 48.0 25.0 2.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 9.5 85.5 DEWPOINT (MEAN C) 7.2 7.4 10.7 13.4 11.0 12.9 18.3 14.0 8.7 4.0 2.3 4.4 9.5 MIXING RATIO (G/KG) 7.00 6.92 8.71 10.77 8.98 10.18 14.43 11.33 7.90 5.62 5.03 5.67 8.55 VAPOUR PRESSURE (HPA) 10.60 10.46 13.09 16.08 13.42 15.11 21.19 16.75 11.82 8.50 7.63 8.62 12.77 SATURATION DEF. (HPA) 10.50 13.79 19.19 29.88 44.42 53.76 51.82 50.28 43.06 33.54 23.64 16.02 32.49 RELATIVE HUMIDITY (MEAN %) 53 48 46 38 27 24 31 27 23 22 26 37 34 RELATIVE HUMIDITY (MAX. %) 70 67 64 51 43 35 42 38 37 34 41 48 48 RELATIVE HUMIDITY (MIN. %) 40 33 32 29 18 16 23 20 15 15 18 28 24 RELATIVE HUMIDITY (MEAN% 03UTC) 70 67 63 50 43 35 42 38 37 32 40 47 47 RELATIVE HUMIDITY (MEAN% 09UTC) 45 40 39 30 22 19 26 23 18 18 21 32 28 RELATIVE HUMIDITY (MEAN% 15UTC) 53 44 42 39 24 21 28 23 20 19 27 39 32 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 30.4 31.6 25.5 32.4 7.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 127.5 DAYS WITH PRECIPITATION >=10 1 1 1 1 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 3 1 2 1 1 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 1 6 1 3 2 1 0 0 0 0 0 0 0 13 DAYS WITH PRECIPITATION 10 2 4 3 2 0 0 0 0 0 0 0 21 GREATEST DAILY PRECIPITATION 10.0 31.0 19.0 28.0 7.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 31.0 DAY 28 2 4 30 1 ** ** ** ** ** ** ** DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 7 7 20 12 6 15 11 9 0 0 0 89 WIND DIRECTION (PREVAILING) 225 270 225 225 225 225 225 270 225 45 45 45 225 PREVAILING WIND SPEED(KNOTS) 7.1 12.5 8.8 9.2 8.1 7.4 8.9 10.0 6.6 12.0 11.3 11.8 8.0 PREVAILING WIND PERCENT 12.3 8.6 15.5 19.3 18.7 20.7 18.7 14.2 16.7 3.2 2.0 3.9 11.9 CALMS PERCENT OF WIND 60.6 60.7 58.7 38.7 49.0 36.7 38.1 58.7 40.7 86.5 97.3 95.5 60.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 276 268 250 265 242 265 275 278 268 341 43 30 267 VECTOR WIND MAGNITUDE(KNOTS) 1.9 2.0 2.7 4.2 2.8 2.8 3.8 3.0 3.0 0.4 0.3 0.4 2.1 WIND STEADINESES (MEAN %) 61.3 55.6 73.0 60.9 63.6 54.9 63.3 81.1 66.7 33.3 100.0 80.0 58.3 WIND SPEED (MEAN KNOTS) 3.1 3.6 3.7 6.9 4.4 5.1 6.0 3.7 4.5 1.2 0.3 0.5 3.6 FASTEST WIND DIRECTION 300 270 240 340 270 240 210 300 250 30 30 30 340 FASTEST WIND SPEED (KNOTS) 20 22 18 30 25 20 26 20 22 15 12 15 30 DAY 23 26 2 2 2 19 10 22 2 7 3 7 DAYS WITH SKY CLEAR (0-2)/8 16 15 12 19 25 25 22 28 30 31 30 20 273 DAYS WITH P.CLOUDY (3-6)/8 9 10 15 10 4 4 9 3 0 0 0 11 75 DAYS WITH CLOUDY (7-8)/8 6 3 4 1 2 1 0 0 0 0 0 0 17 DAYS WITH VISIBILITY =< 2 KM 0 2 0 7 0 0 1 1 0 0 0 0 11 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 953.2 951.1 948.4 946.4 943.1 938.7 935.1 937.5 944.3 950.8 952.4 954.4 946.3 MAX. QFE PRESSURE IN HPA 960.0 959.9 957.8 952.3 953.7 945.0 941.3 942.7 949.7 957.3 957.6 959.3 960.0 DAY-HOUR 17- 6 5- 6 7- 9 4- 6 2- 6 12- 6 27- 6 26- 6 27- 6 25- 6 27- 6 22- 6 MIN. QFE PRESSURE IN HPA 945.6 942.7 942.3 939.6 936.3 930.5 929.2 931.2 939.3 944.6 946.0 948.3 929.2 DAY-HOUR 3-12 12-12 31-12 29-15 29-12 30-15 2-15 11-12 2-15 11-15 10-12 26-15 MEAN QNH PRESSURE IN HPA 1022.4 1020.3 1017.4 1015.2 1011.8 1007.1 1003.3 1005.9 1013.0 1019.9 1021.6 1023.7 1015.1 MAX. QNH PRESSURE IN HPA 1029.7 1029.6 1027.3 1021.5 1023.0 1013.8 1009.9 1011.3 1018.8 1026.8 1027.1 1028.9 1029.7 DAY-HOUR 17- 6 5- 6 7- 9 4- 6 2- 6 12- 6 27- 6 26- 6 27- 6 25- 6 27- 6 22- 6 MIN. QNH PRESSURE IN HPA 1014.4 1011.3 1010.9 1008.1 1004.6 998.4 997.0 999.2 1007.7 1013.4 1014.8 1017.3 997.0 DAY-HOUR 3-12 12-12 31-12 29-15 29-12 30-15 2-15 11-12 2-15 11-15 10-12 26-15 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 953.4 951.8 949.1 947.3 944.1 940.0 936.3 938.8 945.3 951.8 952.8 954.7 947.1 MAX. QFE PRESSURE IN HPA 958.2 957.8 957.0 951.0 951.3 944.3 940.8 941.9 948.4 956.3 956.3 958.0 958.2 DAY 17 5 6 4 2 1 27 3 27 26 27 22 MIN. QFE PRESSURE IN HPA 946.7 945.7 944.3 943.8 939.2 935.7 931.8 934.8 942.2 947.8 948.6 952.0 931.8 DAY 4 12 28 29 13 30 2 14 4 11 10 15 MEAN QNH PRESSURE IN HPA 1022.7 1020.9 1018.2 1016.2 1012.8 1008.5 1004.5 1007.2 1014.1 1021.0 1022.1 1024.1 1016.0 MAX. QNH PRESSURE IN HPA 1027.8 1027.3 1026.5 1020.1 1020.4 1013.0 1009.3 1010.5 1017.4 1025.7 1025.7 1027.5 1027.8 DAY 17 5 6 4 2 1 27 3 27 26 27 22 MIN. QNH PRESSURE IN HPA 1015.6 1014.5 1013.0 1012.5 1007.6 1003.9 999.8 1003.0 1010.8 1016.7 1017.6 1021.2 999.8 DAY 4 12 28 29 13 30 2 14 4 11 10 15 MEAN QFF PRESSURE IN HPA 1022.0 1019.7 1015.7 1012.4 1008.1 1002.9 998.4 1001.7 1009.6 1017.9 1020.4 1023.4 1012.7 MAX. QFF PRESSURE IN HPA 1028.2 1027.9 1025.3 1018.3 1017.2 1007.8 1004.1 1005.3 1013.4 1023.8 1025.5 1027.1 1028.2 DAY 17 5 6 4 2 1 27 3 27 26 27 22 MIN. QFF PRESSURE IN HPA 1014.2 1012.3 1009.1 1008.1 1002.2 997.6 993.4 997.3 1006.3 1012.9 1015.4 1020.0 993.4 DAY 4 12 28 29 29 30 2 15 4 11 10 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 955.2 953.2 950.4 948.4 945.0 940.9 937.1 939.4 946.4 952.4 953.8 955.6 948.1 MAX. QFE PRESSURE IN HPA 960.0 959.9 957.6 952.3 953.7 945.0 941.3 942.7 949.7 957.3 957.6 959.3 960.0 DAY 17 5 7 4 2 12 27 26 27 25 27 22 MIN. QFE PRESSURE IN HPA 949.3 946.2 945.8 944.2 940.2 936.4 932.9 934.8 942.8 948.6 949.6 951.4 932.9 DAY 4 12 28 29 29 30 2 14 4 11 10 26 MEAN QNH PRESSURE IN HPA 1024.5 1022.4 1019.5 1017.4 1013.8 1009.4 1005.4 1007.9 1015.2 1021.6 1023.1 1025.0 1017.1 MAX. QNH PRESSURE IN HPA 1029.7 1029.6 1027.1 1021.5 1023.0 1013.8 1009.9 1011.3 1018.8 1026.8 1027.1 1028.9 1029.7 DAY 17 5 7 4 2 12 27 26 27 25 27 22 MIN. QNH PRESSURE IN HPA 1018.3 1015.1 1014.6 1012.9 1008.7 1004.7 1001.0 1003.0 1011.4 1017.6 1018.6 1020.6 1001.0 DAY 4 12 28 29 29 30 2 14 4 11 10 26 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 953.5 951.7 949.0 946.8 943.6 939.2 935.5 937.9 944.6 950.9 952.6 954.8 946.7 MAX. QFE PRESSURE IN HPA 958.6 958.1 957.8 951.3 951.0 943.3 940.1 941.5 948.0 956.1 956.2 958.1 958.6 DAY 17 5 7 3 2 1 30 26 27 26 4 12 MIN. QFE PRESSURE IN HPA 948.0 944.9 944.0 942.7 938.6 934.7 931.6 933.2 941.6 947.2 947.9 951.0 931.6 DAY 4 12 28 29 29 30 2 15 4 6 10 26 MEAN QNH PRESSURE IN HPA 1022.7 1020.8 1018.0 1015.7 1012.3 1007.6 1003.8 1006.2 1013.4 1020.0 1021.8 1024.2 1015.5 MAX. QNH PRESSURE IN HPA 1028.2 1027.6 1027.3 1020.4 1020.1 1012.0 1008.6 1010.1 1017.0 1025.5 1025.6 1027.6 1028.2 DAY 17 5 7 3 2 1 30 26 27 26 4 12 MIN. QNH PRESSURE IN HPA 1017.0 1013.7 1012.7 1011.3 1007.0 1002.9 999.6 1001.3 1010.2 1016.1 1016.8 1020.1 999.6 DAY 4 12 28 29 29 30 2 15 4 6 10 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 951.6 949.4 946.7 944.6 941.4 936.8 933.3 935.8 942.5 949.4 951.4 953.6 944.7 MAX. QFE PRESSURE IN HPA 957.0 955.8 955.1 950.0 949.6 942.0 938.3 939.2 945.1 955.7 955.4 957.7 957.7 DAY 17 5 4 3 1 11 27 31 27 24 4 12 MIN. QFE PRESSURE IN HPA 945.6 942.7 942.3 940.0 936.3 931.3 929.7 931.2 939.6 945.2 946.0 949.5 929.7 DAY 3 12 31 29 29 30 2 11 3 10 10 26 MEAN QNH PRESSURE IN HPA 1020.7 1018.4 1015.5 1013.3 1009.9 1005.1 1001.4 1004.1 1011.1 1018.5 1020.5 1022.9 1013.5 MAX. QNH PRESSURE IN HPA 1026.5 1025.2 1024.5 1019.1 1018.6 1010.6 1006.7 1007.6 1013.9 1025.1 1024.8 1027.2 1027.2 DAY 17 5 4 3 1 11 27 31 27 24 4 12 MIN. QNH PRESSURE IN HPA 1014.4 1011.3 1010.9 1008.5 1004.6 999.3 997.6 999.2 1008.1 1014.0 1014.8 1018.5 997.6 DAY 3 12 31 29 29 30 2 11 3 10 10 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 952.3 949.7 947.0 944.8 941.5 937.0 933.5 935.9 942.8 949.5 951.4 953.1 944.9 MAX. QFE PRESSURE IN HPA 957.0 956.3 955.1 950.0 949.6 942.0 938.4 939.9 945.9 955.1 954.8 957.2 957.2 DAY 17 5 4 3 1 11 30 31 27 24 21 18 MIN. QFE PRESSURE IN HPA 945.6 943.3 942.8 939.6 937.2 930.5 929.2 931.6 939.3 944.6 946.5 948.3 929.2 DAY 3 12 27 29 29 30 2 14 2 11 10 26 MEAN QNH PRESSURE IN HPA 1021.5 1018.8 1015.9 1013.5 1010.1 1005.3 1001.6 1004.2 1011.4 1018.5 1020.6 1022.3 1013.6 MAX. QNH PRESSURE IN HPA 1026.5 1025.7 1024.5 1019.1 1018.6 1010.6 1006.8 1008.4 1014.7 1024.5 1024.2 1026.7 1026.7 DAY 17 5 4 3 1 11 30 31 27 24 21 18 MIN. QNH PRESSURE IN HPA 1014.4 1012.0 1011.4 1008.1 1005.5 998.4 997.0 999.6 1007.7 1013.4 1015.4 1017.3 997.0 DAY 3 12 27 29 29 30 2 14 2 11 10 26 MEAN QFF PRESSURE IN HPA 1020.7 1017.5 1013.4 1009.6 1005.3 999.6 995.4 998.7 1007.0 1015.4 1018.8 1021.5 1010.3 MAX. QFF PRESSURE IN HPA 1026.7 1026.1 1023.0 1016.6 1015.5 1005.1 1001.6 1003.1 1010.6 1022.1 1023.3 1025.8 1026.7 DAY 17 5 7 3 1 11 30 31 27 24 4 18 MIN. QFF PRESSURE IN HPA 1013.1 1010.3 1007.5 1003.7 999.9 992.0 990.5 993.6 1003.1 1009.3 1013.2 1016.2 990.5 DAY 3 12 27 29 29 30 2 14 2 11 10 26 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 16.4 16.6 20.0 28.0 34.0 38.0 37.7 37.3 33.8 30.2 22.6 16.5 27.6 MINIMUN AIR TEMPERATURE (C) 8.1 9.5 12.2 18.4 24.5 28.4 29.1 29.2 24.2 22.1 14.2 9.4 19.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 5 26 30 31 31 29 24 0 0 176 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 5.0 7.0 7.0 13.0 16.0 24.0 25.5 24.0 20.5 15.5 8.0 5.5 5.0 DAY 21 12 1 1 1 1 15 29 11 27 20 12 MAXIMUM AIR TEMPERATURE (C) 21.8 21.5 25.2 34.1 39.8 44.0 43.5 42.5 40.6 36.3 29.1 22.3 33.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 24 31 30 31 31 30 31 15 0 225 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.0 25.6 33.0 40.0 43.0 46.0 45.0 45.0 43.0 40.0 34.0 28.0 46.0 DAY 10 1 18 27 26 6 10 17 1 1 11 30 DIF. BETWEEN (MAX.-MIN.) (C) 13.7 12.0 13.0 15.7 15.3 15.6 14.4 13.3 16.4 14.2 14.9 12.9 14.3 MEAN DAILY TEMP. (MDT) (C) 14.9 15.5 18.7 26.2 32.2 36.2 36.3 35.9 32.4 29.2 21.7 15.9 26.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 7.1 150.4 345.7 456.6 473.5 460.6 341.7 246.7 54.2 0.0 2536.7 HEATING DEG. DAYS(BASE 18 0C) 95.6 73.7 18.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5.3 68.4 261.1 DEWPOINT (MEAN C) 5.0 6.6 8.9 10.7 11.3 10.8 13.8 16.4 9.7 12.8 8.9 7.5 10.2 MIXING RATIO (G/KG) 6.14 6.70 7.98 8.84 9.52 8.88 11.53 13.19 8.41 10.08 7.81 6.98 8.84 VAPOUR PRESSURE (HPA) 9.30 10.11 12.02 13.25 14.23 13.20 16.98 19.41 12.59 15.12 11.78 10.57 13.21 SATURATION DEF. (HPA) 10.21 9.44 12.32 26.51 41.00 55.52 50.27 46.38 42.28 29.62 17.30 9.00 29.15 RELATIVE HUMIDITY (MEAN %) 49 54 53 38 28 21 27 31 25 36 43 58 39 RELATIVE HUMIDITY (MAX. %) 62 72 71 60 45 36 44 47 38 47 59 77 55 RELATIVE HUMIDITY (MIN. %) 38 41 38 26 19 14 17 22 16 27 32 43 28 RELATIVE HUMIDITY (MEAN% 03UTC) 61 70 68 59 43 36 42 46 37 47 60 74 54 RELATIVE HUMIDITY (MEAN% 09UTC) 44 49 48 30 24 16 22 27 21 30 35 47 33 RELATIVE HUMIDITY (MEAN% 15UTC) 47 50 48 31 21 15 22 24 20 33 44 62 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 33.0 12.0 150.8 17.0 16.0 0.0 11.0 0.0 0.0 0.0 19.0 27.0 285.8 DAYS WITH PRECIPITATION >=10 1 0 6 1 1 0 1 0 0 0 1 0 11 DAYS WITH PRECIPITATION >= 5 2 1 8 1 1 0 1 0 0 0 2 2 18 DAYS WITH PRECIPITATION >= 1 4 3 8 2 2 0 1 0 0 0 2 8 30 DAYS WITH PRECIPITATION 4 3 9 2 2 0 1 0 0 0 2 8 31 GREATEST DAILY PRECIPITATION 22.0 8.0 50.0 14.0 15.0 0.0 11.0 0.0 0.0 0.0 14.0 9.0 50.0 DAY 30 9 29 30 1 ** 27 ** ** ** 14 11 DAY WITH THUNDER STORM 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 2 9 7 1 10 1 4 0 0 0 34 WIND DIRECTION (PREVAILING) 45 45 225 270 270 270 270 315 315 270 315 270 270 PREVAILING WIND SPEED(KNOTS) 19.0 29.0 21.8 15.3 11.0 7.3 10.7 12.0 12.7 8.9 6.0 8.4 10.8 PREVAILING WIND PERCENT 2.6 0.7 2.6 5.3 5.8 2.0 3.9 3.2 6.0 4.5 1.3 3.2 2.4 CALMS PERCENT OF WIND 94.2 98.6 94.2 87.3 86.5 95.3 85.2 93.5 88.7 93.5 96.0 94.8 92.3 NO. OF WIND OBSERVATION 154 139 155 150 155 150 155 155 150 155 150 155 1823 VECTOR WIND DIRECTION (MEAN) 24 9 236 290 287 287 280 294 305 268 307 273 293 VECTOR WIND MAGNITUDE(KNOTS) 0.8 0.3 0.7 1.2 1.3 0.2 0.9 0.4 0.9 0.5 0.1 0.3 0.5 WIND STEADINESES (MEAN %) 66.7 100.0 70.0 63.2 86.7 50.0 56.3 66.7 69.2 83.3 50.0 75.0 55.6 WIND SPEED (MEAN KNOTS) 1.2 0.3 1.0 1.9 1.5 0.4 1.6 0.6 1.3 0.6 0.2 0.4 0.9 FASTEST WIND DIRECTION 90 30 210 330 350 230 220 300 340 310 60 280 30 FASTEST WIND SPEED (KNOTS) 23 29 29 29 19 16 25 16 17 12 8 16 29 DAY 17 28 7 4 12 24 26 21 6 25 16 3 DAYS WITH SKY CLEAR (0-2)/8 19 10 16 20 26 30 27 24 30 23 26 18 269 DAYS WITH P.CLOUDY (3-6)/8 8 11 6 9 5 0 4 6 0 8 3 10 70 DAYS WITH CLOUDY (7-8)/8 4 7 9 1 0 0 0 1 0 0 1 3 26 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 2 0 1 0 0 0 1 0 4 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 266.9 208.8 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 953.0 950.6 949.8 946.1 944.8 938.6 936.4 936.9 944.5 949.2 951.5 953.8 946.3 MAX. QFE PRESSURE IN HPA 959.2 957.8 956.0 953.9 949.5 945.4 942.1 943.4 950.4 954.3 961.9 959.1 961.9 DAY-HOUR 22- 6 20- 6 30- 6 1- 6 3- 6 5- 6 5- 6 31- 6 29- 6 30- 6 18- 6 12- 6 MIN. QFE PRESSURE IN HPA 947.5 945.8 944.0 937.4 939.0 933.4 929.4 930.0 937.0 944.0 944.0 947.6 929.4 DAY-HOUR 29-12 25-12 19-12 18-12 28-15 13-15 31-12 1-15 13-15 1-15 6-12 7-12 MEAN QNH PRESSURE IN HPA 1022.2 1019.8 1018.9 1015.0 1013.6 1007.0 1004.7 1005.2 1013.3 1018.3 1020.7 1023.1 1015.1 MAX. QNH PRESSURE IN HPA 1028.8 1027.3 1025.4 1023.2 1018.5 1014.2 1010.7 1012.1 1019.5 1023.6 1031.7 1028.7 1031.7 DAY-HOUR 22- 6 20- 6 30- 6 1- 6 3- 6 5- 6 5- 6 31- 6 29- 6 30- 6 18- 6 12- 6 MIN. QNH PRESSURE IN HPA 1016.4 1014.6 1012.7 1005.7 1007.4 1001.5 997.3 997.9 1005.3 1012.7 1012.7 1016.5 997.3 DAY-HOUR 29-12 25-12 19-12 18-12 28-15 13-15 31-12 1-15 13-15 1-15 6-12 7-12 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 953.2 951.0 950.0 946.7 946.0 939.8 937.6 937.8 945.3 950.1 952.2 954.0 947.0 MAX. QFE PRESSURE IN HPA 957.8 955.1 955.0 952.9 948.4 944.4 941.4 942.0 948.6 953.7 959.5 957.2 959.5 DAY 22 20 30 1 3 1 5 31 30 30 18 5 MIN. QFE PRESSURE IN HPA 950.2 947.4 945.0 941.8 943.2 936.3 933.8 933.8 941.4 946.6 945.3 948.5 933.8 DAY 29 25 28 18 24 14 31 1 13 1 7 8 MEAN QNH PRESSURE IN HPA 1022.4 1020.1 1019.1 1015.6 1014.8 1008.3 1006.0 1006.2 1014.1 1019.2 1021.4 1023.3 1015.9 MAX. QNH PRESSURE IN HPA 1027.3 1024.5 1024.4 1022.1 1017.4 1013.1 1010.0 1010.6 1017.6 1023.0 1029.1 1026.7 1029.1 DAY 22 20 30 1 3 1 5 31 30 30 18 5 MIN. QNH PRESSURE IN HPA 1019.3 1016.3 1013.8 1010.4 1011.9 1004.6 1001.9 1001.9 1010.0 1015.5 1014.1 1017.5 1001.9 DAY 29 25 28 18 24 14 31 1 13 1 7 8 MEAN QFF PRESSURE IN HPA 1022.1 1019.5 1017.6 1012.2 1010.0 1002.6 1000.3 1000.4 1009.5 1015.5 1019.4 1022.9 1012.7 MAX. QFF PRESSURE IN HPA 1028.0 1024.4 1022.8 1020.5 1014.9 1008.3 1004.2 1005.8 1013.4 1020.3 1028.6 1027.4 1028.6 DAY 22 20 31 1 1 1 5 31 30 30 18 12 MIN. QFF PRESSURE IN HPA 1018.1 1015.2 1011.4 1005.6 1006.4 998.6 996.1 995.8 1005.6 1010.9 1011.5 1016.0 995.8 DAY 29 25 19 28 24 14 31 1 14 3 7 8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 954.4 951.9 951.2 948.0 946.8 940.6 938.1 938.5 946.7 951.3 953.6 955.7 948.1 MAX. QFE PRESSURE IN HPA 959.2 957.8 956.0 953.9 949.5 945.4 942.1 943.4 950.4 954.3 961.9 959.1 961.9 DAY 22 20 30 1 3 5 5 31 29 30 18 12 MIN. QFE PRESSURE IN HPA 950.8 949.0 946.3 942.3 942.3 937.0 933.8 934.4 943.4 948.0 947.1 950.6 933.8 DAY 29 25 28 18 23 14 31 1 13 21 7 8 MEAN QNH PRESSURE IN HPA 1023.7 1021.1 1020.4 1017.0 1015.6 1009.1 1006.5 1006.9 1015.5 1020.4 1022.9 1025.1 1017.0 MAX. QNH PRESSURE IN HPA 1028.8 1027.3 1025.4 1023.2 1018.5 1014.2 1010.7 1012.1 1019.5 1023.6 1031.7 1028.7 1031.7 DAY 22 20 30 1 3 5 5 31 29 30 18 12 MIN. QNH PRESSURE IN HPA 1019.9 1018.0 1015.2 1010.9 1010.9 1005.3 1001.9 1002.6 1012.1 1017.0 1016.0 1019.7 1001.9 DAY 29 25 28 18 23 14 31 1 13 21 7 8 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 953.2 951.1 950.4 947.0 945.7 939.4 937.1 937.6 945.2 949.5 951.9 954.3 946.9 MAX. QFE PRESSURE IN HPA 957.6 957.0 956.0 953.0 948.4 943.7 940.5 943.0 948.0 952.4 960.4 957.8 960.4 DAY 22 20 30 5 3 4 5 31 26 30 18 9 MIN. QFE PRESSURE IN HPA 948.5 947.6 945.7 940.4 942.3 935.9 932.5 932.9 942.0 946.3 946.0 949.2 932.5 DAY 2 2 19 18 28 14 31 1 12 1 7 7 MEAN QNH PRESSURE IN HPA 1022.5 1020.2 1019.5 1015.9 1014.5 1007.8 1005.4 1005.9 1014.0 1018.5 1021.1 1023.6 1015.7 MAX. QNH PRESSURE IN HPA 1027.1 1026.5 1025.4 1022.2 1017.4 1012.4 1009.0 1011.7 1017.0 1021.6 1030.1 1027.3 1030.1 DAY 22 20 30 5 3 4 5 31 26 30 18 9 MIN. QNH PRESSURE IN HPA 1017.5 1016.5 1014.5 1008.9 1010.9 1004.1 1000.5 1001.0 1010.6 1015.2 1014.8 1018.2 1000.5 DAY 2 2 19 18 28 14 31 1 12 1 7 7 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 952.3 949.9 948.8 944.6 943.2 937.1 934.9 935.6 943.2 947.9 949.9 952.4 945.0 MAX. QFE PRESSURE IN HPA 957.0 957.4 953.6 949.7 946.5 941.8 939.0 940.8 947.4 950.5 958.1 955.7 958.1 DAY 22 20 30 4 12 4 5 31 28 29 18 4 MIN. QFE PRESSURE IN HPA 947.5 945.8 944.0 937.4 939.7 934.0 929.4 931.3 939.0 945.0 944.0 947.6 929.4 DAY 29 25 19 18 28 14 31 1 13 1 6 7 MEAN QNH PRESSURE IN HPA 1021.5 1018.9 1017.8 1013.3 1011.8 1005.4 1003.1 1003.9 1011.9 1016.8 1018.9 1021.7 1013.8 MAX. QNH PRESSURE IN HPA 1026.5 1026.9 1022.9 1018.8 1015.4 1010.4 1007.4 1009.3 1016.3 1019.6 1027.6 1025.1 1027.6 DAY 22 20 30 4 12 4 5 31 28 29 18 4 MIN. QNH PRESSURE IN HPA 1016.4 1014.6 1012.7 1005.7 1008.2 1002.1 997.3 999.3 1007.4 1013.8 1012.7 1016.5 997.3 DAY 29 25 19 18 28 14 31 1 13 1 6 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 952.0 949.5 948.8 944.5 942.6 936.3 934.5 934.8 942.4 947.5 950.0 952.6 944.6 MAX. QFE PRESSURE IN HPA 956.8 957.4 953.6 949.7 945.9 940.4 937.8 940.3 946.4 950.7 958.7 956.2 958.7 DAY 5 20 30 4 13 4 4 31 28 30 18 4 MIN. QFE PRESSURE IN HPA 948.0 946.2 945.1 938.4 939.0 933.4 929.4 930.0 937.0 944.0 944.3 947.6 929.4 DAY 2 1 22 18 28 13 31 1 13 1 6 7 MEAN QNH PRESSURE IN HPA 1021.2 1018.5 1017.8 1013.2 1011.2 1004.6 1002.7 1003.0 1011.1 1016.4 1019.1 1021.8 1013.4 MAX. QNH PRESSURE IN HPA 1026.3 1026.9 1022.9 1018.8 1014.7 1008.9 1006.2 1008.8 1015.3 1019.8 1028.3 1025.6 1028.3 DAY 5 20 30 4 13 4 4 31 28 30 18 4 MIN. QNH PRESSURE IN HPA 1017.0 1015.1 1013.9 1006.8 1007.4 1001.5 997.3 997.9 1005.3 1012.7 1013.0 1016.5 997.3 DAY 2 1 22 18 28 13 31 1 13 1 6 7 MEAN QFF PRESSURE IN HPA 1020.8 1018.0 1016.3 1009.9 1006.4 999.0 997.0 997.3 1006.5 1012.7 1017.2 1021.3 1010.2 MAX. QFF PRESSURE IN HPA 1026.3 1027.1 1021.1 1016.4 1011.0 1003.2 1000.4 1003.9 1010.8 1017.3 1027.8 1026.0 1027.8 DAY 5 20 30 4 13 4 4 31 28 28 18 9 MIN. QFF PRESSURE IN HPA 1016.1 1013.4 1011.9 1002.7 1002.0 995.4 991.4 991.8 1001.2 1008.3 1010.4 1014.9 991.4 DAY 30 2 22 27 28 15 31 1 13 1 6 7 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 16.7 18.1 20.5 26.5 35.9 39.5 38.6 36.0 35.8 28.9 23.1 16.5 28.0 MINIMUN AIR TEMPERATURE (C) 8.9 10.6 12.7 17.9 25.9 29.6 30.7 29.8 27.7 18.4 12.6 8.5 19.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 6 29 30 31 31 30 10 0 0 167 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 5.2 5.0 7.5 12.5 20.0 27.0 26.4 27.0 22.5 13.0 9.5 2.0 2.0 DAY 15 1 4 3 4 2 16 5 28 26 3 25 MAXIMUM AIR TEMPERATURE (C) 22.8 23.9 26.4 32.4 42.0 46.2 44.8 41.4 41.8 35.8 29.3 21.9 34.1 DAYS WITH MAXIMUM TEMP. >=30 0 1 5 17 31 30 31 31 30 30 11 0 217 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 29.0 30.0 30.5 40.0 44.0 49.0 49.0 45.0 44.0 42.5 33.0 27.6 49.0 DAY 2 27 29 28 11 28 3 1 3 1 3 9 DIF. BETWEEN (MAX.-MIN.) (C) 13.9 13.3 13.7 14.5 16.1 16.6 14.1 11.6 14.1 17.4 16.7 13.4 14.6 MEAN DAILY TEMP. (MDT) (C) 15.8 17.3 19.6 25.2 33.9 37.9 37.7 35.6 34.7 27.1 21.0 15.2 26.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 2.5 8.5 132.1 400.9 507.1 517.9 452.6 412.4 183.5 13.5 0.0 2631.2 HEATING DEG. DAYS(BASE 18 0C) 76.7 41.7 8.8 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 91.0 218.4 DEWPOINT (MEAN C) 5.0 5.7 6.9 8.9 11.2 11.8 15.6 19.4 12.6 1.7 1.0 2.1 8.5 MIXING RATIO (G/KG) 5.97 6.33 6.94 7.82 9.05 9.54 12.91 15.82 10.88 5.16 4.71 5.01 8.34 VAPOUR PRESSURE (HPA) 9.05 9.57 10.47 11.75 13.51 14.16 18.97 23.23 16.11 7.78 7.12 7.59 12.44 SATURATION DEF. (HPA) 10.97 12.15 14.70 25.06 47.79 60.42 51.46 37.69 44.41 34.31 22.62 12.33 31.16 RELATIVE HUMIDITY (MEAN %) 48 48 45 38 24 21 30 42 28 20 26 41 34 RELATIVE HUMIDITY (MAX. %) 68 69 66 56 38 34 45 62 44 33 39 57 51 RELATIVE HUMIDITY (MIN. %) 35 34 32 26 16 13 19 28 18 12 17 29 23 RELATIVE HUMIDITY (MEAN% 03UTC) 66 67 64 56 38 34 42 60 44 30 36 57 50 RELATIVE HUMIDITY (MEAN% 09UTC) 41 41 39 32 20 17 26 35 24 18 25 36 30 RELATIVE HUMIDITY (MEAN% 15UTC) 48 45 40 31 19 16 24 36 22 17 23 39 30 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 19.0 19.0 18.0 7.0 0.0 2.0 35.0 32.0 2.0 0.0 0.0 13.0 147.0 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 2 1 0 0 0 1 5 DAYS WITH PRECIPITATION >= 5 1 2 2 0 0 0 2 3 0 0 0 1 11 DAYS WITH PRECIPITATION >= 1 2 3 5 3 0 1 2 5 1 0 0 2 24 DAYS WITH PRECIPITATION 2 3 5 3 0 1 2 5 1 0 0 2 24 GREATEST DAILY PRECIPITATION 17.0 8.0 7.0 4.0 0.0 2.0 25.0 15.0 2.0 0.0 0.0 11.0 25.0 DAY 21 12 12 1 ** 2 26 13 13 ** ** 13 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 5 4 4 7 5 3 6 1 2 0 0 40 WIND DIRECTION (PREVAILING) 270 225 225 270 225 270 315 270 315 225 225 270 270 PREVAILING WIND SPEED(KNOTS) 7.6 9.6 9.8 10.4 9.0 6.3 12.1 10.0 25.0 7.0 7.0 7.8 9.5 PREVAILING WIND PERCENT 3.2 3.6 5.8 10.7 3.2 4.0 5.8 3.2 0.7 3.9 8.0 6.5 3.7 CALMS PERCENT OF WIND 92.3 92.9 85.1 78.7 91.0 92.7 88.4 92.9 99.3 89.0 79.3 81.3 88.5 NO. OF WIND OBSERVATION 155 140 154 150 155 150 155 155 150 155 150 155 1824 VECTOR WIND DIRECTION (MEAN) 277 264 276 284 227 273 291 292 330 244 239 292 273 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.6 1.3 1.6 0.6 0.5 1.0 0.8 0.2 0.6 0.9 0.6 0.7 WIND STEADINESES (MEAN %) 83.3 85.7 72.2 80.0 54.5 83.3 83.3 88.9 100.0 60.0 60.0 42.9 63.6 WIND SPEED (MEAN KNOTS) 0.6 0.7 1.8 2.0 1.1 0.6 1.2 0.9 0.2 1.0 1.5 1.4 1.1 FASTEST WIND DIRECTION 280 310 330 290 270 300 300 330 330 300 270 250 270 FASTEST WIND SPEED (KNOTS) 14 16 17 17 29 16 19 29 25 17 14 12 29 DAY 10 23 19 15 13 17 5 1 12 29 16 24 DAYS WITH SKY CLEAR (0-2)/8 21 14 16 16 25 29 22 17 29 31 28 23 271 DAYS WITH P.CLOUDY (3-6)/8 8 8 7 9 6 1 9 9 1 0 2 5 65 DAYS WITH CLOUDY (7-8)/8 2 6 8 5 0 0 0 5 0 0 0 3 29 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 2 0 1 2 1 0 0 0 6 DURATION OF SUNSHINE HOURS 243.3 197.2 238.3 247.5 279.3 220.7 256.8 234.4 ****** ****** 271.2 203.6 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 953.9 951.6 950.3 946.9 942.7 938.8 936.5 937.5 941.5 947.9 950.4 950.3 945.7 MAX. QFE PRESSURE IN HPA 961.4 958.7 956.4 956.1 950.0 946.0 941.8 943.0 948.0 954.1 955.8 957.5 961.4 DAY-HOUR 12- 6 3- 6 27- 6 19- 6 5- 9 1- 6 10- 6 8- 6 30- 6 22- 6 27- 6 4- 6 MIN. QFE PRESSURE IN HPA 947.5 944.3 942.6 941.9 936.6 930.8 930.1 930.9 934.6 942.0 945.6 943.9 930.1 DAY-HOUR 26-12 28-12 24- 9 14-12 13-15 28-15 25-15 1-15 2-15 7-12 11-15 27-12 MEAN QNH PRESSURE IN HPA 1023.2 1020.8 1019.4 1015.8 1011.4 1007.2 1004.8 1005.8 1010.0 1016.9 1019.5 1019.4 1014.5 MAX. QNH PRESSURE IN HPA 1031.1 1028.3 1025.8 1025.5 1019.1 1014.8 1010.4 1011.7 1017.0 1023.4 1025.2 1027.0 1031.1 DAY-HOUR 12- 6 3- 6 27- 6 19- 6 5- 9 1- 6 10- 6 8- 6 30- 6 22- 6 27- 6 4- 6 MIN. QNH PRESSURE IN HPA 1016.4 1013.0 1011.2 1010.5 1004.9 998.7 998.0 998.8 1002.8 1010.6 1014.4 1012.6 998.0 DAY-HOUR 26-12 28-12 24- 9 14-12 13-15 28-15 25-15 1-15 2-15 7-12 11-15 27-12 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 954.0 951.7 950.6 947.3 943.7 939.9 937.8 938.6 942.5 948.6 951.1 950.8 946.4 MAX. QFE PRESSURE IN HPA 960.4 956.0 954.5 954.3 949.3 945.4 940.9 942.0 947.0 952.9 955.0 955.5 960.4 DAY 12 4 27 19 6 1 10 30 25 22 28 5 MIN. QFE PRESSURE IN HPA 948.8 946.0 944.2 943.8 940.3 934.0 934.6 935.6 938.6 945.0 947.1 945.2 934.0 DAY 27 28 24 11 11 28 20 17 9 3 11 28 MEAN QNH PRESSURE IN HPA 1023.4 1020.9 1019.7 1016.3 1012.4 1008.4 1006.2 1007.0 1011.1 1017.6 1020.3 1019.9 1015.3 MAX. QNH PRESSURE IN HPA 1030.1 1025.4 1023.8 1023.6 1018.3 1014.2 1009.4 1010.6 1015.9 1022.1 1024.4 1024.9 1030.1 DAY 12 4 27 19 6 1 10 30 25 22 28 5 MIN. QNH PRESSURE IN HPA 1017.8 1014.8 1012.9 1012.5 1008.8 1002.1 1002.8 1003.8 1007.0 1013.8 1016.0 1014.0 1002.1 DAY 27 28 24 11 11 28 20 17 9 3 11 28 MEAN QFF PRESSURE IN HPA 1023.0 1020.1 1018.1 1013.3 1007.3 1002.5 1000.1 1001.2 1005.8 1014.5 1018.6 1019.5 1012.0 MAX. QFF PRESSURE IN HPA 1030.5 1025.9 1022.6 1020.3 1014.0 1008.7 1003.2 1005.3 1011.4 1019.7 1023.4 1026.0 1030.5 DAY 12 2 27 19 6 1 10 28 25 28 28 25 MIN. QFF PRESSURE IN HPA 1016.4 1012.2 1011.1 1009.4 1003.6 995.9 996.6 997.8 1001.0 1009.3 1014.9 1013.9 995.9 DAY 25 28 24 25 11 28 20 17 9 3 11 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 955.9 953.4 952.4 948.7 944.4 940.5 938.2 939.3 943.4 950.0 952.6 952.6 947.6 MAX. QFE PRESSURE IN HPA 961.4 958.7 956.4 956.1 950.0 946.0 941.8 943.0 948.0 954.1 955.8 957.5 961.4 DAY 12 3 27 19 6 1 10 8 30 22 27 4 MIN. QFE PRESSURE IN HPA 950.0 946.8 948.2 945.3 941.3 934.6 935.1 936.6 939.6 946.4 948.6 948.0 934.6 DAY 25 28 7 14 11 29 20 17 11 2 11 28 MEAN QNH PRESSURE IN HPA 1025.3 1022.7 1021.6 1017.7 1013.1 1009.0 1006.6 1007.7 1012.0 1019.1 1021.8 1021.8 1016.5 MAX. QNH PRESSURE IN HPA 1031.1 1028.3 1025.8 1025.5 1019.1 1014.8 1010.4 1011.7 1017.0 1023.4 1025.2 1027.0 1031.1 DAY 12 3 27 19 6 1 10 8 30 22 27 4 MIN. QNH PRESSURE IN HPA 1019.1 1015.7 1017.2 1014.1 1009.9 1002.8 1003.3 1004.9 1008.1 1015.3 1017.6 1017.0 1002.8 DAY 25 28 7 14 11 29 20 17 11 2 11 28 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 954.4 952.3 951.0 947.6 943.4 939.3 937.0 938.1 941.9 948.4 950.6 950.7 946.2 MAX. QFE PRESSURE IN HPA 959.8 957.3 955.7 954.3 950.0 944.8 940.1 941.0 946.6 952.4 955.4 955.7 959.8 DAY 11 3 12 19 5 1 10 8 30 27 28 5 MIN. QFE PRESSURE IN HPA 949.9 945.5 942.6 944.3 939.6 932.7 933.9 935.6 938.3 944.7 947.2 945.9 932.7 DAY 25 28 24 14 24 28 20 1 8 6 11 27 MEAN QNH PRESSURE IN HPA 1023.8 1021.5 1020.1 1016.6 1012.1 1007.8 1005.3 1006.5 1010.5 1017.4 1019.8 1019.8 1015.1 MAX. QNH PRESSURE IN HPA 1029.4 1026.8 1025.1 1023.6 1019.1 1013.6 1008.6 1009.5 1015.5 1021.6 1024.8 1025.1 1029.4 DAY 11 3 12 19 5 1 10 8 30 27 28 5 MIN. QNH PRESSURE IN HPA 1019.0 1014.3 1011.2 1013.0 1008.1 1000.8 1002.0 1003.8 1006.7 1013.5 1016.1 1014.7 1000.8 DAY 25 28 24 14 24 28 20 1 8 6 11 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 952.5 950.2 949.0 945.4 941.5 937.5 935.2 936.1 940.2 946.3 948.8 948.7 944.3 MAX. QFE PRESSURE IN HPA 958.1 955.7 953.9 952.3 948.0 942.8 938.3 939.0 944.6 951.0 953.1 954.0 958.1 DAY 11 3 12 19 5 3 9 7 25 27 28 4 MIN. QFE PRESSURE IN HPA 947.5 944.3 942.7 941.9 938.2 931.3 932.5 933.0 936.4 942.0 945.6 943.9 931.3 DAY 26 28 24 14 10 28 25 25 7 7 12 27 MEAN QNH PRESSURE IN HPA 1021.8 1019.3 1018.0 1014.2 1010.0 1005.8 1003.4 1004.4 1008.7 1015.2 1017.8 1017.7 1013.0 MAX. QNH PRESSURE IN HPA 1027.6 1025.1 1023.2 1021.5 1017.0 1011.4 1006.7 1007.4 1013.4 1020.1 1022.4 1023.3 1027.6 DAY 11 3 12 19 5 3 9 7 25 27 28 4 MIN. QNH PRESSURE IN HPA 1016.4 1013.0 1011.3 1010.5 1006.6 999.3 1000.5 1001.1 1004.7 1010.6 1014.4 1012.6 999.3 DAY 26 28 24 14 10 28 25 25 7 7 12 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 952.7 950.4 948.8 945.3 940.7 936.9 934.5 935.4 939.4 946.3 948.9 949.1 944.0 MAX. QFE PRESSURE IN HPA 958.8 956.1 952.9 952.3 946.0 943.2 938.3 940.0 944.0 950.7 953.1 954.5 958.8 DAY 11 3 12 19 5 1 9 7 25 31 28 25 MIN. QFE PRESSURE IN HPA 948.3 945.0 944.2 942.4 936.6 930.8 930.1 930.9 934.6 942.3 945.6 943.9 930.1 DAY 26 13 24 11 13 28 25 1 2 7 11 27 MEAN QNH PRESSURE IN HPA 1021.9 1019.5 1017.8 1014.1 1009.2 1005.2 1002.6 1003.6 1007.9 1015.1 1017.9 1018.1 1012.8 MAX. QNH PRESSURE IN HPA 1028.4 1025.5 1022.1 1021.5 1014.8 1011.9 1006.7 1008.5 1012.7 1019.8 1022.4 1023.8 1028.4 DAY 11 3 12 19 5 1 9 7 25 31 28 25 MIN. QNH PRESSURE IN HPA 1017.3 1013.8 1012.9 1011.0 1004.9 998.7 998.0 998.8 1002.8 1010.9 1014.4 1012.6 998.0 DAY 26 13 24 11 13 28 25 1 2 7 11 27 MEAN QFF PRESSURE IN HPA 1021.5 1018.6 1016.2 1011.1 1004.1 999.3 996.6 998.0 1002.7 1012.1 1016.3 1017.7 1009.5 MAX. QFF PRESSURE IN HPA 1028.5 1025.5 1021.1 1018.3 1010.6 1007.0 1000.4 1003.5 1008.2 1017.3 1021.2 1025.1 1028.5 DAY 11 3 12 19 5 1 9 7 25 31 28 25 MIN. QFF PRESSURE IN HPA 1016.4 1012.4 1011.3 1006.9 1000.1 992.4 992.6 992.9 996.8 1006.8 1013.1 1011.4 992.4 DAY 25 28 24 24 13 28 19 1 10 7 11 14 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 IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 15.2 16.0 25.0 28.7 32.6 36.7 38.6 37.7 34.1 25.5 21.7 16.3 27.4 MINIMUN AIR TEMPERATURE (C) 6.7 6.7 15.0 20.3 24.1 28.2 29.6 30.1 24.2 14.9 13.1 7.6 18.4 DAYS WITH MINIMUM TEMP. >=21 0 0 2 12 29 30 31 31 26 0 0 0 161 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 1 0 0 0 0 0 0 0 0 0 2 4 TEMPERATURE RECORDS LOWEST(C) 0.0 -1.0 10.0 16.0 20.0 23.0 27.0 26.5 19.0 8.5 10.0 -1.4 -1.4 DAY 22 21 2 28 3 3 5 12 17 30 22 22 MAXIMUM AIR TEMPERATURE (C) 20.6 21.5 30.4 36.6 40.0 43.9 43.6 43.1 39.9 32.5 29.2 21.7 33.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 20 30 31 30 31 31 30 25 11 0 239 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.5 27.0 37.0 39.5 44.0 46.0 45.5 46.0 43.0 36.5 31.5 28.4 46.0 DAY 17 13 30 12 29 11 3 4 4 7 3 7 DIF. BETWEEN (MAX.-MIN.) (C) 13.9 14.8 15.4 16.3 15.9 15.7 14.0 13.0 15.7 17.6 16.1 14.1 15.2 MEAN DAILY TEMP. (MDT) (C) 13.7 14.1 22.7 28.5 32.0 36.0 36.6 36.6 32.0 23.7 21.2 14.7 26.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 72.3 224.7 342.0 451.0 484.2 482.6 331.1 94.0 21.1 0.0 2503.0 HEATING DEG. DAYS(BASE 18 0C) 134.5 115.0 1.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 115.5 366.6 DEWPOINT (MEAN C) -0.7 -5.1 4.5 3.2 5.9 3.5 11.7 18.3 11.3 -3.3 1.6 -0.4 4.2 MIXING RATIO (G/KG) 4.20 3.19 6.05 5.38 6.39 5.80 10.34 14.97 10.32 3.44 4.81 4.49 6.62 VAPOUR PRESSURE (HPA) 6.36 4.84 9.09 8.08 9.54 8.56 15.20 21.88 15.27 5.20 7.27 6.79 9.84 SATURATION DEF. (HPA) 11.73 14.58 24.46 33.19 41.65 55.44 55.08 45.14 40.49 29.67 20.02 12.86 32.03 RELATIVE HUMIDITY (MEAN %) 38 28 32 22 20 14 23 35 28 16 29 37 27 RELATIVE HUMIDITY (MAX. %) 58 52 53 32 29 26 37 52 38 27 46 57 42 RELATIVE HUMIDITY (MIN. %) 26 16 19 12 13 8 15 24 20 10 17 25 17 RELATIVE HUMIDITY (MEAN% 03UTC) 56 52 51 30 26 22 35 51 36 26 39 56 40 RELATIVE HUMIDITY (MEAN% 09UTC) 32 22 25 16 16 15 20 31 27 12 24 27 22 RELATIVE HUMIDITY (MEAN% 15UTC) 33 21 26 16 14 9 17 27 23 14 26 36 22 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 8.0 0.0 25.0 0.0 0.0 0.0 3.0 10.0 0.0 0.0 0.0 6.0 52.0 DAYS WITH PRECIPITATION >=10 0 0 2 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 1 0 2 0 0 0 0 1 0 0 0 0 4 DAYS WITH PRECIPITATION >= 1 3 0 3 0 0 0 1 2 0 0 0 2 11 DAYS WITH PRECIPITATION 3 0 3 0 0 0 1 2 0 0 0 2 11 GREATEST DAILY PRECIPITATION 5.0 0.0 13.0 0.0 0.0 0.0 3.0 9.0 0.0 0.0 0.0 4.0 13.0 DAY 30 ** 15 ** ** ** 15 12 ** ** ** 29 DAY WITH THUNDER STORM 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 5 7 11 16 14 8 12 11 8 8 3 2 105 WIND DIRECTION (PREVAILING) 45 315 270 270 270 270 315 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 5.4 9.9 9.0 10.7 10.5 8.9 12.1 9.4 10.3 8.2 9.1 5.9 9.4 PREVAILING WIND PERCENT 11.6 13.8 22.1 22.0 16.6 12.9 11.6 28.4 15.3 7.8 7.7 10.8 14.7 CALMS PERCENT OF WIND 65.2 46.2 41.1 36.6 53.9 51.9 62.6 47.1 60.7 71.7 69.1 70.1 55.8 NO. OF WIND OBSERVATION 155 145 163 232 241 210 155 155 150 166 207 157 2136 VECTOR WIND DIRECTION (MEAN) 326 317 291 296 291 304 287 265 278 304 293 309 294 VECTOR WIND MAGNITUDE(KNOTS) 1.5 2.8 2.3 4.0 3.3 2.6 2.6 3.8 2.8 1.5 1.3 1.0 2.4 WIND STEADINESES (MEAN %) 55.6 59.6 46.0 67.8 75.0 57.8 66.7 79.2 73.7 65.2 59.1 52.6 63.2 WIND SPEED (MEAN KNOTS) 2.7 4.7 5.0 5.9 4.4 4.5 3.9 4.8 3.8 2.3 2.2 1.9 3.8 FASTEST WIND DIRECTION 270 360 300 300 270 330 210 360 190 350 270 30 360 FASTEST WIND SPEED (KNOTS) 19 29 29 29 19 19 25 19 17 19 19 16 29 DAY 17 18 23 26 2 11 17 14 9 8 18 9 DAYS WITH SKY CLEAR (0-2)/8 21 23 17 26 28 30 19 24 27 31 19 13 278 DAYS WITH P.CLOUDY (3-6)/8 8 6 7 4 3 0 9 7 3 0 9 9 65 DAYS WITH CLOUDY (7-8)/8 2 0 7 0 0 0 3 0 0 0 2 9 23 DAYS WITH VISIBILITY =< 2 KM 3 2 0 4 7 3 5 3 1 2 0 0 30 DURATION OF SUNSHINE HOURS 235.5 250.9 209.8 268.7 291.5 283.1 241.1 261.8 271.8 283.7 265.4 209.7 3073.0 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 948.9 949.7 945.9 942.0 938.8 932.4 932.3 932.7 939.6 947.4 949.5 950.2 942.4 MAX. QFE PRESSURE IN HPA 957.8 957.5 953.4 947.3 944.0 939.0 936.5 937.2 946.2 953.3 956.2 956.0 957.8 DAY-HOUR 5- 6 21- 6 4- 6 11- 6 6- 6 4- 6 26- 3 24- 6 22- 6 9- 6 26- 6 24- 6 MIN. QFE PRESSURE IN HPA 941.5 942.8 938.3 936.2 932.4 927.6 926.2 927.1 931.1 941.4 944.3 944.6 926.2 DAY-HOUR 17-12 16-12 13-12 26-12 28-15 16-12 20-15 5-12 1-12 7-12 15-12 7-12 MEAN QNH PRESSURE IN HPA 1017.9 1018.8 1014.7 1010.6 1007.2 1000.4 1000.3 1000.7 1008.0 1016.4 1018.5 1019.3 1011.1 MAX. QNH PRESSURE IN HPA 1027.3 1027.0 1022.7 1016.2 1012.7 1007.4 1004.8 1005.5 1015.1 1022.6 1025.6 1025.4 1027.3 DAY-HOUR 5- 6 21- 6 4- 6 11- 6 6- 6 4- 6 26- 3 24- 6 22- 6 9- 6 26- 6 24- 6 MIN. QNH PRESSURE IN HPA 1010.1 1011.4 1006.7 1004.5 1000.4 995.4 993.9 994.8 999.1 1010.0 1013.0 1013.4 993.9 DAY-HOUR 17-12 16-12 13-12 26-12 28-15 16-12 20-15 5-12 1-12 7-12 15-12 7-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1006.4 1002.0 994.6 ****** ****** ****** ****** 1016.5 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1011.8 1008.0 1001.9 ****** ****** ****** ****** 1023.8 ****** ****** DAY-HOUR **-** **-** **-** 2- 6 5- 6 4- 6 **-** **-** **-** **-** 26- 6 **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** 999.8 994.9 989.2 ****** ****** ****** ****** 1011.6 ****** ****** DAY-HOUR **-** **-** **-** 26-12 28-15 16-12 **-** **-** **-** **-** 15-15 **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 942.0 938.6 932.6 ****** ****** ****** ****** 949.8 ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 944.6 943.0 937.4 ****** ****** ****** ****** 954.3 ****** ****** DAY ** ** ** 2 6 1 ** ** ** ** 26 ** MIN. QFE PRESSURE IN HPA ****** ****** ****** 938.6 934.1 928.5 ****** ****** ****** ****** 946.5 ****** ****** DAY ** ** ** 26 29 16 ** ** ** ** 14 ** MEAN QNH PRESSURE IN HPA ****** ****** ****** 1010.6 1007.0 1000.7 ****** ****** ****** ****** 1018.9 ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1013.4 1011.7 1005.7 ****** ****** ****** ****** 1023.6 ****** ****** DAY ** ** ** 2 6 1 ** ** ** ** 26 ** MIN. QNH PRESSURE IN HPA ****** ****** ****** 1007.0 1002.2 996.3 ****** ****** ****** ****** 1015.4 ****** ****** DAY ** ** ** 26 29 16 ** ** ** ** 14 ** MEAN QFF PRESSURE IN HPA ****** ****** ****** 1006.4 1002.0 994.8 ****** ****** ****** ****** 1016.6 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1009.1 1007.0 1000.4 ****** ****** ****** ****** 1021.3 ****** ****** DAY ** ** ** 2 6 1 ** ** ** ** 26 ** MIN. QFF PRESSURE IN HPA ****** ****** ****** 1002.3 996.2 990.2 ****** ****** ****** ****** 1012.8 ****** ****** DAY ** ** ** 26 29 16 ** ** ** ** 14 ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 949.1 950.1 946.3 943.2 940.0 934.0 933.6 934.0 940.5 947.9 949.9 950.7 943.3 MAX. QFE PRESSURE IN HPA 955.9 956.0 951.6 945.8 943.1 938.6 936.5 936.4 944.8 951.8 955.0 954.3 956.0 DAY 5 21 4 2 6 1 26 24 26 9 25 19 MIN. QFE PRESSURE IN HPA 942.9 945.6 940.4 940.2 935.9 930.8 930.1 931.9 933.4 944.1 946.4 946.9 930.1 DAY 30 17 15 26 29 16 20 6 1 1 16 10 MEAN QNH PRESSURE IN HPA 1018.1 1019.2 1015.2 1011.9 1008.5 1002.1 1001.7 1002.1 1009.0 1016.9 1019.0 1019.8 1012.0 MAX. QNH PRESSURE IN HPA 1025.3 1025.4 1020.8 1014.6 1011.8 1007.0 1004.8 1004.7 1013.6 1021.0 1024.4 1023.6 1025.4 DAY 5 21 4 2 6 1 26 24 26 9 25 19 MIN. QNH PRESSURE IN HPA 1011.6 1014.4 1008.9 1008.7 1004.1 998.7 998.0 999.9 1001.5 1012.8 1015.3 1015.8 998.0 DAY 30 17 15 26 29 16 20 6 1 1 16 10 MEAN QFF PRESSURE IN HPA 1018.0 1019.0 1012.7 1008.1 1003.7 996.4 995.7 996.0 1004.3 1014.5 1017.2 1019.4 1008.7 MAX. QFF PRESSURE IN HPA 1025.5 1027.0 1019.1 1011.0 1007.3 1001.9 998.6 998.9 1009.6 1018.5 1023.0 1024.8 1027.0 DAY 5 21 4 2 6 1 26 29 30 23 26 24 MIN. QFF PRESSURE IN HPA 1010.0 1013.4 1005.9 1004.4 998.3 992.9 991.8 993.3 996.1 1009.6 1013.3 1013.6 991.8 DAY 30 16 15 26 29 16 20 7 1 1 16 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION IRANSHAHR (40879) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 27 12 N LONGITUDE 60 42 E DATA PROCESSING CENTER ELEVATION 591.1 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 951.1 951.9 947.9 944.1 940.9 934.7 934.2 934.7 941.6 949.4 951.4 952.2 944.5 MAX. QFE PRESSURE IN HPA 957.8 957.5 953.4 947.3 944.0 939.0 936.5 937.2 946.2 953.3 956.2 956.0 957.8 DAY 5 21 4 11 6 4 26 24 22 9 26 24 MIN. QFE PRESSURE IN HPA 945.6 946.7 941.7 941.0 936.5 931.6 930.5 932.1 935.2 945.4 948.3 947.8 930.5 DAY 20 16 13 26 29 16 20 6 1 1 14 7 MEAN QNH PRESSURE IN HPA 1020.2 1021.1 1016.8 1012.9 1009.5 1002.8 1002.3 1002.9 1010.2 1018.4 1020.6 1021.4 1013.2 MAX. QNH PRESSURE IN HPA 1027.3 1027.0 1022.7 1016.2 1012.7 1007.4 1004.8 1005.5 1015.1 1022.6 1025.6 1025.4 1027.3 DAY 5 21 4 11 6 4 26 24 22 9 26 24 MIN. QNH PRESSURE IN HPA 1014.4 1015.6 1010.3 1009.5 1004.8 999.6 998.4 1000.1 1003.4 1014.2 1017.3 1016.7 998.4 DAY 20 16 13 26 29 16 20 6 1 1 14 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1008.8 1004.2 997.1 ****** ****** ****** ****** 1018.9 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1011.8 1008.0 1001.9 ****** ****** ****** ****** 1023.8 ****** ****** DAY ** ** ** 2 5 4 ** ** ** ** 26 ** MIN. QFF PRESSURE IN HPA ****** ****** ****** 1004.8 998.6 993.4 ****** ****** ****** ****** 1014.4 ****** ****** DAY ** ** ** 26 29 16 ** ** ** ** 14 ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 949.3 950.2 946.4 942.4 939.6 932.8 932.7 933.1 940.1 947.6 949.6 950.2 942.8 MAX. QFE PRESSURE IN HPA 955.4 955.3 951.8 945.4 942.8 937.4 934.9 935.9 944.8 951.0 955.4 953.6 955.4 DAY 5 21 19 2 5 4 26 24 22 9 26 20 MIN. QFE PRESSURE IN HPA 943.7 945.5 941.0 939.3 935.0 929.6 929.2 930.5 933.2 943.3 946.6 946.1 929.2 DAY 20 16 12 26 29 16 20 5 1 18 16 7 MEAN QNH PRESSURE IN HPA 1018.3 1019.3 1015.2 1011.0 1008.0 1000.9 1000.8 1001.2 1008.6 1016.5 1018.7 1019.3 1011.5 MAX. QNH PRESSURE IN HPA 1024.8 1024.7 1021.0 1014.2 1011.4 1005.7 1003.1 1004.1 1013.6 1020.1 1024.8 1022.9 1024.8 DAY 5 21 19 2 5 4 26 24 22 9 26 20 MIN. QNH PRESSURE IN HPA 1012.4 1014.3 1009.5 1007.7 1003.2 997.5 997.0 998.4 1001.3 1012.0 1015.5 1014.9 997.0 DAY 20 16 12 26 29 16 20 5 1 18 16 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1006.8 1002.7 994.9 ****** ****** ****** ****** 1016.6 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1010.4 1006.5 1000.0 ****** ****** ****** ****** 1022.4 ****** ****** DAY ** ** ** 2 5 4 ** ** ** ** 26 ** MIN. QFF PRESSURE IN HPA ****** ****** ****** 1002.5 997.2 991.2 ****** ****** ****** ****** 1013.0 ****** ****** DAY ** ** ** 26 29 7 ** ** ** ** 14 ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 947.3 948.0 944.4 940.1 937.3 930.8 930.7 930.9 938.1 945.6 947.8 948.7 940.8 MAX. QFE PRESSURE IN HPA 953.3 953.2 951.1 942.3 941.1 935.0 933.9 933.4 943.1 949.0 952.4 951.4 953.3 DAY 4 21 19 2 5 4 31 24 25 9 26 20 MIN. QFE PRESSURE IN HPA 941.5 942.8 938.3 936.2 933.0 927.6 926.9 927.1 931.1 941.4 944.3 944.6 926.9 DAY 17 16 13 26 28 16 20 5 1 7 15 7 MEAN QNH PRESSURE IN HPA 1016.2 1017.0 1013.1 1008.5 1005.7 998.7 998.7 998.8 1006.5 1014.4 1016.7 1017.7 1009.3 MAX. QNH PRESSURE IN HPA 1022.6 1022.5 1020.2 1010.9 1009.6 1003.2 1002.0 1001.5 1011.8 1018.0 1021.6 1020.6 1022.6 DAY 4 21 19 2 5 4 31 24 25 9 26 20 MIN. QNH PRESSURE IN HPA 1010.1 1011.4 1006.7 1004.5 1001.1 995.4 994.6 994.8 999.1 1010.0 1013.0 1013.4 994.6 DAY 17 16 13 26 28 16 20 5 1 7 15 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1004.3 1000.4 992.8 ****** ****** ****** ****** 1015.0 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1007