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 **