STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** ***** 10.7 14.9 21.1 25.1 23.7 18.0 12.9 4.6 -0.2 ***** MINIMUN AIR TEMPERATURE (C) ***** ***** ***** 2.9 5.4 8.8 14.2 13.3 7.4 4.4 -0.1 -4.7 ***** DAYS WITH MINIMUM TEMP. >=21 **** **** **** 0 0 0 0 0 0 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** **** **** 0 0 0 0 0 0 0 3 22 **** DAYS WITH FREEZING MIN.<= 0 **** **** **** 4 0 0 0 0 1 4 18 31 **** TEMPERATURE RECORDS LOWEST(C) ***** ***** ***** -2.0 1.0 4.0 9.0 9.0 0.0 -2.0 -6.0 -9.5 ***** DAY ** ** ** 1 1 26 3 19 20 23 21 7 MAXIMUM AIR TEMPERATURE (C) ***** ***** ***** 15.4 19.4 26.0 31.0 29.5 23.9 18.1 8.2 3.1 ***** DAYS WITH MAXIMUM TEMP. >=30 **** **** **** 0 0 3 23 19 3 0 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 **** **** **** 0 0 0 0 0 0 0 0 6 **** TEMPERATURE RECORDS HIGHEST(C)***** ***** ***** 19.8 25.2 32.0 34.5 32.2 31.5 24.5 14.0 10.0 ***** DAY ** ** ** 17 24 30 11 26 3 6 5 24 DIF. BETWEEN (MAX.-MIN.) (C) ***** ***** ***** 12.5 14.0 17.2 16.8 16.2 16.5 13.7 8.3 7.8 ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** ***** 9.1 12.4 17.4 22.6 21.4 15.7 11.2 4.1 -0.8 ***** COOLING DEG. DAYS(BASE 21 0C)****** ****** ****** 0.0 0.0 0.5 51.4 32.6 2.0 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C)****** ****** ****** 265.5 167.7 32.4 0.0 1.5 96.1 209.8 417.9 582.9 ****** DEWPOINT (MEAN C) ***** ***** ***** ***** ***** -4.1 0.7 -0.1 -4.7 -3.2 -1.4 -4.8 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** 3.75 5.43 5.24 3.58 3.98 4.63 3.56 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** 4.71 6.80 6.56 4.50 5.03 5.82 4.46 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** 22.19 26.28 23.92 17.69 10.70 2.90 1.71 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** 21 23 25 26 38 69 74 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** 40 40 44 45 57 87 88 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** 11 13 14 15 25 51 61 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** 40 40 42 45 56 76 82 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** 15 18 20 19 30 65 65 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** 14 15 17 19 35 71 77 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** ****** 18.3 7.8 0.0 0.0 0.0 0.0 63.4 16.7 21.1 ****** DAYS WITH PRECIPITATION >=10 **** **** **** 0 0 0 0 0 0 2 0 1 **** DAYS WITH PRECIPITATION >= 5 **** **** **** 1 0 0 0 0 0 2 2 2 **** DAYS WITH PRECIPITATION >= 1 **** **** **** 4 2 0 0 0 0 2 5 4 **** DAYS WITH PRECIPITATION **** **** **** 8 4 0 0 0 0 2 5 5 **** GREATEST DAILY PRECIPITATION ****** ****** ****** 8.0 3.0 0.0 0.0 0.0 0.0 53.0 7.0 13.5 ****** DAY ** ** ** 27 4 ** ** ** ** 30 12 1 DAY WITH THUNDER STORM **** **** **** 2 1 1 0 0 0 0 0 0 **** DAYS WITH SNOW OR SLEET **** **** **** 0 0 0 0 0 0 0 1 3 **** DAYS WITH DUST **** **** **** 2 0 0 0 0 2 4 1 0 **** WIND DIRECTION (PREVAILING) *** *** *** 270 225 270 135 270 270 270 225 270 *** PREVAILING WIND SPEED(KNOTS) **** **** **** 14.1 14.0 10.4 10.8 8.5 10.5 12.1 14.0 10.2 **** PREVAILING WIND PERCENT ***** ***** ***** 19.3 15.5 24.8 18.7 12.9 20.7 21.9 18.0 16.1 ***** CALMS PERCENT OF WIND ***** ***** ***** 46.0 47.1 38.9 38.1 48.4 44.0 40.6 36.0 49.7 ***** NO. OF WIND OBSERVATION **** **** **** 150 155 149 155 155 150 155 150 155 1374 VECTOR WIND DIRECTION (MEAN) *** *** *** 257 257 253 154 219 242 237 225 237 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** 3.8 4.4 4.4 2.7 1.2 3.4 5.1 4.0 2.8 **** WIND STEADINESES (MEAN %) ***** ***** ***** 60.3 72.1 75.9 46.6 29.3 68.0 75.0 61.5 71.8 ***** WIND SPEED (MEAN KNOTS) **** **** **** 6.3 6.1 5.8 5.8 4.1 5.0 6.8 6.5 3.9 **** FASTEST WIND DIRECTION *** *** *** 250 240 250 220 200 260 240 220 250 *** FASTEST WIND SPEED (KNOTS) *** *** *** 39 39 29 19 19 19 29 31 21 *** DAY ** ** ** 1 17 23 13 11 18 7 20 8 DAYS WITH SKY CLEAR (0-2)/8 **** **** **** 16 19 30 29 28 29 25 13 17 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** 12 12 0 2 3 1 6 9 10 **** DAYS WITH CLOUDY (7-8)/8 **** **** **** 2 0 0 0 0 0 0 8 4 **** DAYS WITH VISIBILITY =< 2 KM **** **** **** 1 0 0 0 0 0 1 7 3 **** DURATION OF SUNSHINE HOURS ****** ****** ****** 263.5 323.6 372.0 364.1 ****** ****** ****** 169.4 168.1 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 785.9 786.3 786.2 787.8 790.0 788.2 785.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 789.8 790.1 789.7 793.5 795.5 792.0 790.7 ****** DAY-HOUR **-** **-** **-** **-** **-** 13- 9 9- 6 19- 9 24- 6 27- 6 3- 6 18- 9 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 780.8 781.3 779.4 782.8 784.2 782.6 778.4 ****** DAY-HOUR **-** **-** **-** **-** **-** 10-12 5-12 1-15 13-12 30-12 19-15 4-12 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1019.1 1019.5 1019.5 1021.4 1024.1 1021.9 1018.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1023.9 1024.2 1023.8 1028.4 1030.9 1026.6 1025.0 ****** DAY-HOUR **-** **-** **-** **-** **-** 13- 9 9- 6 19- 9 24- 6 27- 6 3- 6 18- 9 MIN. 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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 ****** ****** ****** ****** ****** 786.2 786.7 786.5 788.1 790.2 788.2 785.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 789.6 789.7 789.4 793.2 794.5 791.4 790.0 ****** DAY ** ** ** ** ** 4 9 19 24 27 3 19 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 781.8 783.2 781.1 783.7 786.0 783.6 780.1 ****** DAY ** ** ** ** ** 10 6 2 13 31 20 5 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1019.5 1020.1 1019.8 1021.7 1024.3 1021.8 1018.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1023.6 1023.8 1023.4 1028.1 1029.7 1025.9 1024.1 ****** DAY ** ** ** ** ** 4 9 19 24 27 3 19 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1014.0 1015.7 1013.1 1016.3 1019.2 1016.2 1011.9 ****** DAY ** ** ** ** ** 10 6 2 13 31 20 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1003.6 1001.1 1002.3 1009.6 1016.3 1020.2 1021.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1008.7 1006.6 1012.0 1020.7 1023.3 1027.6 1028.6 ****** DAY ** ** ** ** ** 13 9 19 23 23 23 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 998.9 996.1 996.0 1003.4 1009.4 1015.2 1014.5 ****** DAY ** ** ** ** ** 30 5 1 7 2 30 13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 786.5 787.0 786.9 788.3 790.7 788.8 786.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 789.8 790.1 789.4 793.5 795.5 792.0 790.0 ****** DAY ** ** ** ** ** 26 9 19 24 27 3 19 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 782.0 783.5 781.6 784.2 786.8 784.6 781.6 ****** DAY ** ** ** ** ** 10 6 1 13 2 19 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1019.7 1020.4 1020.2 1022.0 1025.0 1022.7 1019.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1023.9 1024.2 1023.4 1028.4 1030.9 1026.6 1024.1 ****** DAY ** ** ** ** ** 26 9 19 24 27 3 19 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1014.2 1016.1 1013.8 1017.0 1020.2 1017.5 1013.8 ****** DAY ** ** ** ** ** 10 6 1 13 2 19 4 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 ****** ****** ****** ****** ****** 786.2 786.6 786.6 788.0 790.1 788.4 785.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 789.8 789.9 789.7 793.0 793.8 791.6 790.7 ****** DAY ** ** ** ** ** 13 9 19 23 27 3 18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 781.6 782.5 781.3 783.6 785.6 784.1 780.8 ****** DAY ** ** ** ** ** 10 5 1 13 30 19 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1019.5 1019.9 1020.0 1021.7 1024.3 1022.2 1018.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1023.9 1024.0 1023.8 1027.8 1028.8 1026.1 1025.0 ****** DAY ** ** ** ** ** 13 9 19 23 27 3 18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1013.8 1014.9 1013.4 1016.2 1018.7 1016.8 1012.8 ****** DAY ** ** ** ** ** 10 5 1 13 30 19 4 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 ****** ****** ****** ****** ****** 785.5 785.8 785.7 787.2 789.4 787.7 785.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 789.6 789.1 788.7 791.8 793.1 791.2 790.7 ****** DAY ** ** ** ** ** 4 9 19 23 4 3 18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 780.8 781.3 779.6 782.8 784.2 783.2 778.4 ****** DAY ** ** ** ** ** 10 5 1 13 30 19 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1018.6 1018.9 1018.8 1020.7 1023.4 1021.3 1018.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1023.6 1023.0 1022.5 1026.3 1027.9 1025.6 1025.0 ****** DAY ** ** ** ** ** 4 9 19 23 4 3 18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1012.8 1013.4 1011.3 1015.2 1017.0 1015.7 1009.8 ****** DAY ** ** ** ** ** 10 5 1 13 30 19 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 785.4 785.4 785.5 787.3 789.7 788.0 785.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 789.2 788.7 788.2 791.7 793.5 791.2 790.7 ****** DAY ** ** ** ** ** 26 9 26 23 4 3 18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 781.2 781.6 779.4 782.9 784.4 782.6 778.4 ****** DAY ** ** ** ** ** 10 5 1 13 30 19 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1018.4 1018.4 1018.6 1020.8 1023.8 1021.6 1018.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1023.1 1022.5 1021.9 1026.2 1028.4 1025.6 1025.0 ****** DAY ** ** ** ** ** 26 9 26 23 4 3 18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1013.3 1013.8 1011.0 1015.4 1017.2 1015.0 1009.8 ****** DAY ** ** ** ** ** 10 5 1 13 30 19 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1002.8 999.6 1001.1 1008.8 1015.9 1019.9 1021.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1009.1 1006.1 1007.8 1020.3 1022.0 1026.4 1027.2 ****** DAY ** ** ** ** ** 12 9 18 22 23 21 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 997.5 994.7 994.2 1001.7 1010.2 1013.9 1013.1 ****** DAY ** ** ** ** ** 30 5 1 6 2 19 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -6.9 -5.9 -0.0 6.7 14.2 20.6 23.7 23.0 20.1 10.8 7.3 -0.1 9.5 MINIMUN AIR TEMPERATURE (C) -11.0 -10.5 -4.8 -0.4 4.4 9.2 13.5 11.3 8.6 3.3 0.4 -5.4 1.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 30 28 18 6 0 0 0 0 0 0 3 18 103 DAYS WITH FREEZING MIN.<= 0 31 28 31 18 4 0 0 0 0 4 16 24 156 TEMPERATURE RECORDS LOWEST(C) -20.0 -16.0 -13.0 -5.0 0.0 4.0 8.0 7.5 5.0 -2.0 -6.5 -20.0 -20.0 DAY 11 24 17 3 4 18 1 24 20 16 14 27 MAXIMUM AIR TEMPERATURE (C) -3.3 -2.7 3.6 11.6 18.7 25.9 29.0 29.2 26.2 15.5 11.8 3.9 14.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 17 16 0 0 0 0 33 DAYS WITH MAXIMUM TEMP. <= 0 27 24 6 0 0 0 0 0 0 0 0 11 68 TEMPERATURE RECORDS HIGHEST(C) 3.5 2.0 8.5 21.2 25.0 29.0 32.5 34.5 29.0 21.5 18.9 13.0 34.5 DAY 31 27 31 27 24 24 16 14 15 11 4 2 DIF. BETWEEN (MAX.-MIN.) (C) 7.7 7.8 8.4 12.0 14.3 16.7 15.5 17.9 17.6 12.2 11.4 9.3 12.6 MEAN DAILY TEMP. (MDT) (C) -7.2 -6.6 -0.6 5.6 11.5 17.6 21.3 20.2 17.4 9.4 6.1 -0.8 7.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.3 47.8 17.1 0.0 0.0 0.0 0.0 65.2 HEATING DEG. DAYS(BASE 18 0C) 779.9 688.2 559.2 372.0 200.1 27.5 9.9 4.3 26.2 267.3 356.6 581.5 3872.8 DEWPOINT (MEAN C) -10.3 -8.4 -4.5 -2.6 -2.7 -1.6 3.7 0.3 -5.3 -2.0 -4.0 -7.6 -3.8 MIXING RATIO (G/KG) 2.38 2.67 3.63 4.17 4.30 4.62 6.59 5.28 3.54 4.41 3.77 3.04 4.03 VAPOUR PRESSURE (HPA) 2.98 3.34 4.56 5.21 5.40 5.78 8.23 6.61 4.45 5.56 4.75 3.83 5.06 SATURATION DEF. (HPA) 0.83 0.71 1.77 5.25 11.65 19.41 22.37 22.95 20.30 8.05 5.92 2.90 10.17 RELATIVE HUMIDITY (MEAN %) 78 83 74 58 37 26 31 27 20 47 49 61 49 RELATIVE HUMIDITY (MAX. %) 86 90 85 81 60 48 51 45 35 69 70 75 66 RELATIVE HUMIDITY (MIN. %) 70 75 62 40 23 15 20 15 13 33 34 48 37 RELATIVE HUMIDITY (MEAN% 03UTC) 82 87 81 78 60 45 49 45 34 66 65 67 63 RELATIVE HUMIDITY (MEAN% 09UTC) 74 80 70 50 30 18 25 22 15 37 37 56 43 RELATIVE HUMIDITY (MEAN% 15UTC) 80 84 74 54 29 18 26 17 16 48 51 65 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 36.7 38.6 61.1 66.9 9.4 0.0 0.0 0.0 0.0 38.8 23.0 17.5 292.0 DAYS WITH PRECIPITATION >=10 0 1 2 2 0 0 0 0 0 1 1 1 8 DAYS WITH PRECIPITATION >= 5 2 3 4 2 0 0 0 0 0 4 3 1 19 DAYS WITH PRECIPITATION >= 1 12 7 9 6 3 0 0 0 0 6 3 4 50 DAYS WITH PRECIPITATION 15 10 13 12 4 0 0 0 0 8 3 7 72 GREATEST DAILY PRECIPITATION 6.0 13.0 14.0 30.0 4.0 0.0 0.0 0.0 0.0 13.0 10.0 10.0 30.0 DAY 28 10 11 2 11 ** ** ** ** 29 12 25 DAY WITH THUNDER STORM 0 0 0 0 2 0 0 0 0 0 1 0 3 DAYS WITH SNOW OR SLEET 12 10 14 6 0 0 0 0 0 1 0 5 48 DAYS WITH DUST 0 0 0 0 2 4 3 0 0 0 0 2 11 WIND DIRECTION (PREVAILING) 270 225 270 225 225 270 90 270 225 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 8.1 10.0 9.0 12.3 11.1 8.8 7.6 9.5 8.5 10.3 8.7 10.4 10.0 PREVAILING WIND PERCENT 12.3 10.7 18.7 30.7 22.6 19.3 18.7 18.7 17.3 19.4 22.7 24.5 17.6 CALMS PERCENT OF WIND 47.7 50.7 40.0 26.0 35.5 28.7 49.0 38.7 41.3 41.9 50.7 43.2 41.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 260 235 250 249 235 230 133 223 222 245 236 246 237 VECTOR WIND MAGNITUDE(KNOTS) 2.3 1.6 1.9 7.8 4.0 3.3 1.7 2.4 2.8 2.5 3.1 4.4 2.9 WIND STEADINESES (MEAN %) 52.3 42.1 35.8 82.1 64.5 55.0 43.6 46.2 58.3 51.0 72.1 78.6 54.7 WIND SPEED (MEAN KNOTS) 4.4 3.8 5.3 9.5 6.2 6.0 3.9 5.2 4.8 4.9 4.3 5.6 5.3 FASTEST WIND DIRECTION 270 180 190 280 240 190 20 180 230 270 190 270 280 FASTEST WIND SPEED (KNOTS) 25 23 27 39 39 27 19 21 23 27 21 29 39 DAY 10 19 7 19 2 16 5 19 20 25 9 9 DAYS WITH SKY CLEAR (0-2)/8 10 7 13 12 22 30 25 31 30 19 17 11 227 DAYS WITH P.CLOUDY (3-6)/8 11 8 10 16 7 0 6 0 0 8 12 13 91 DAYS WITH CLOUDY (7-8)/8 10 12 8 2 2 0 0 0 0 4 1 7 46 DAYS WITH VISIBILITY =< 2 KM 7 11 3 2 0 0 0 0 0 0 0 3 26 DURATION OF SUNSHINE HOURS ****** ****** 199.3 254.5 131.7 ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 784.1 782.1 786.5 784.3 786.5 785.8 785.3 786.0 787.8 790.2 790.1 786.9 786.3 MAX. QFE PRESSURE IN HPA 791.7 789.8 794.5 790.3 791.1 790.2 789.5 789.3 792.0 795.7 797.1 793.0 797.1 DAY-HOUR 26- 9 8- 6 9- 9 25- 6 16- 6 5- 6 15- 6 29- 6 27- 6 16- 6 23- 6 7- 6 MIN. QFE PRESSURE IN HPA 777.3 772.2 781.9 774.2 778.5 780.3 781.5 782.3 784.1 784.1 783.6 776.1 772.2 DAY-HOUR 17-15 15-12 24-12 2- 3 12-15 26-15 2-12 8-12 4-15 14- 3 9-12 25- 3 MEAN QNH PRESSURE IN HPA 1016.8 1014.4 1019.8 1017.1 1019.8 1019.0 1018.3 1019.2 1021.4 1024.3 1024.2 1020.3 1019.6 MAX. QNH PRESSURE IN HPA 1026.2 1023.9 1029.7 1024.5 1025.5 1024.4 1023.5 1023.3 1026.6 1031.2 1032.9 1027.8 1032.9 DAY-HOUR 26- 9 8- 6 9- 9 25- 6 16- 6 5- 6 15- 6 29- 6 27- 6 16- 6 23- 6 7- 6 MIN. QNH PRESSURE IN HPA 1008.4 1002.1 1014.1 1004.6 1009.9 1012.1 1013.6 1014.6 1016.8 1016.8 1016.2 1007.0 1002.1 DAY-HOUR 17-15 15-12 24-12 2- 3 12-15 26-15 2-12 8-12 4-15 14- 3 9-12 25- 3 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 783.9 781.7 786.3 784.1 786.5 786.1 785.7 786.4 788.0 790.1 790.1 786.7 786.3 MAX. QFE PRESSURE IN HPA 790.6 788.9 793.0 790.0 790.4 789.7 789.2 788.8 790.8 795.3 796.3 792.0 796.3 DAY 26 8 10 25 16 5 16 29 23 16 23 28 MIN. QFE PRESSURE IN HPA 777.3 772.9 782.7 774.2 778.7 781.4 782.0 783.7 785.2 784.1 784.1 776.1 772.9 DAY 23 19 24 2 13 27 2 8 5 14 12 25 MEAN QNH PRESSURE IN HPA 1016.6 1013.9 1019.5 1016.9 1019.8 1019.3 1018.8 1019.7 1021.6 1024.3 1024.2 1020.1 1019.6 MAX. QNH PRESSURE IN HPA 1024.9 1022.8 1027.8 1024.1 1024.6 1023.8 1023.1 1022.6 1025.1 1030.7 1031.9 1026.6 1031.9 DAY 26 8 10 25 16 5 16 29 23 16 23 28 MIN. QNH PRESSURE IN HPA 1008.4 1003.0 1015.1 1004.6 1010.2 1013.5 1014.2 1016.3 1018.2 1016.8 1016.8 1007.0 1003.0 DAY 23 19 24 2 13 27 2 8 5 14 12 25 MEAN QFF PRESSURE IN HPA 1025.8 1022.0 1021.8 1013.4 1009.9 1004.2 1000.6 1002.8 1008.1 1018.0 1021.3 1023.3 1014.3 MAX. QFF PRESSURE IN HPA 1041.0 1030.6 1034.0 1020.0 1016.0 1010.3 1005.4 1008.2 1013.2 1030.0 1033.5 1044.5 1044.5 DAY 26 26 21 8 15 1 9 30 27 16 14 28 MIN. QFF PRESSURE IN HPA 1012.6 1006.1 1011.6 1002.5 1002.5 996.6 994.1 997.5 1001.4 1007.3 1013.3 1012.0 994.1 DAY 4 19 24 2 2 26 30 7 10 14 12 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 784.7 782.7 787.0 784.7 786.9 786.4 786.1 786.9 788.6 790.8 790.8 787.5 786.9 MAX. QFE PRESSURE IN HPA 791.6 789.8 794.0 790.3 791.1 790.2 789.5 789.3 792.0 795.7 797.1 793.0 797.1 DAY 26 8 9 25 16 5 15 29 27 16 23 7 MIN. QFE PRESSURE IN HPA 777.3 772.7 782.7 776.7 779.0 781.4 782.3 783.8 785.2 784.9 785.2 778.0 772.7 DAY 23 19 24 2 13 27 2 8 5 14 12 25 MEAN QNH PRESSURE IN HPA 1017.6 1015.1 1020.4 1017.5 1020.2 1019.7 1019.3 1020.2 1022.3 1025.1 1025.1 1021.1 1020.3 MAX. QNH PRESSURE IN HPA 1026.1 1023.9 1029.1 1024.5 1025.5 1024.4 1023.5 1023.3 1026.6 1031.2 1032.9 1027.8 1032.9 DAY 26 8 9 25 16 5 15 29 27 16 23 7 MIN. QNH PRESSURE IN HPA 1008.4 1002.8 1015.1 1007.7 1010.5 1013.5 1014.6 1016.5 1018.2 1017.8 1018.2 1009.3 1002.8 DAY 23 19 24 2 13 27 2 8 5 14 12 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 784.5 782.5 786.9 784.6 786.8 786.0 785.6 786.3 788.0 790.5 790.2 787.1 786.6 MAX. QFE PRESSURE IN HPA 791.7 789.6 794.5 790.3 790.8 789.9 789.2 788.7 791.3 794.8 796.2 792.6 796.2 DAY 26 8 9 25 16 1 15 4 27 16 22 7 MIN. QFE PRESSURE IN HPA 777.7 773.0 782.2 777.5 779.2 781.3 782.0 783.2 785.3 784.2 784.2 778.7 773.0 DAY 23 10 24 1 13 26 2 8 10 14 12 25 MEAN QNH PRESSURE IN HPA 1017.3 1014.9 1020.3 1017.4 1020.2 1019.2 1018.7 1019.6 1021.7 1024.7 1024.4 1020.6 1019.9 MAX. QNH PRESSURE IN HPA 1026.2 1023.6 1029.7 1024.5 1025.1 1024.0 1023.1 1022.5 1025.7 1030.0 1031.8 1027.3 1031.8 DAY 26 8 9 25 16 1 15 4 27 16 22 7 MIN. QNH PRESSURE IN HPA 1008.9 1003.1 1014.5 1008.7 1010.8 1013.4 1014.2 1015.7 1018.3 1017.0 1017.0 1010.2 1003.1 DAY 23 10 24 1 13 26 2 8 10 14 12 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 783.6 781.6 786.3 784.0 786.4 785.4 784.6 785.3 787.2 789.7 789.5 786.5 785.8 MAX. QFE PRESSURE IN HPA 791.0 788.2 794.3 789.6 789.6 789.7 788.4 788.1 790.7 794.2 795.6 792.1 795.6 DAY 26 8 9 25 16 4 15 29 27 18 22 7 MIN. QFE PRESSURE IN HPA 777.6 772.2 781.9 776.4 778.6 780.6 781.5 782.3 784.3 784.8 783.6 777.1 772.2 DAY 4 15 24 1 12 26 2 8 4 14 9 24 MEAN QNH PRESSURE IN HPA 1016.2 1013.7 1019.5 1016.8 1019.6 1018.4 1017.5 1018.4 1020.7 1023.8 1023.5 1019.8 1019.0 MAX. QNH PRESSURE IN HPA 1025.4 1021.9 1029.4 1023.6 1023.6 1023.8 1022.1 1021.8 1025.0 1029.3 1031.0 1026.7 1031.0 DAY 26 8 9 25 16 4 15 29 27 18 22 7 MIN. QNH PRESSURE IN HPA 1008.8 1002.1 1014.1 1007.3 1010.0 1012.5 1013.6 1014.6 1017.1 1017.7 1016.2 1008.2 1002.1 DAY 4 15 24 1 12 26 2 8 4 14 9 24 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 783.9 782.1 786.3 784.2 786.2 785.3 784.4 785.3 787.2 789.8 789.8 786.7 785.9 MAX. QFE PRESSURE IN HPA 791.0 788.4 794.3 789.6 789.3 790.1 788.5 787.6 790.4 794.6 796.3 792.5 796.3 DAY 26 7 9 25 18 4 15 16 27 15 22 28 MIN. QFE PRESSURE IN HPA 777.3 772.2 782.0 776.0 778.5 780.3 781.5 782.3 784.1 785.3 785.0 776.6 772.2 DAY 17 15 24 1 12 26 2 8 4 28 9 24 MEAN QNH PRESSURE IN HPA 1016.6 1014.3 1019.5 1017.0 1019.4 1018.3 1017.2 1018.3 1020.7 1023.9 1023.9 1020.1 1019.1 MAX. QNH PRESSURE IN HPA 1025.4 1022.1 1029.4 1023.6 1023.3 1024.2 1022.3 1021.2 1024.6 1029.8 1031.9 1027.2 1031.9 DAY 26 7 9 25 18 4 15 16 27 15 22 28 MIN. QNH PRESSURE IN HPA 1008.4 1002.1 1014.2 1006.8 1009.9 1012.1 1013.6 1014.6 1016.8 1018.3 1017.9 1007.6 1002.1 DAY 17 15 24 1 12 26 2 8 4 28 9 24 MEAN QFF PRESSURE IN HPA 1025.9 1022.3 1021.6 1013.4 1009.5 1003.3 999.0 1001.4 1007.3 1017.7 1021.0 1023.3 1013.8 MAX. QFF PRESSURE IN HPA 1041.0 1029.7 1033.0 1020.0 1014.5 1010.3 1004.3 1007.4 1012.8 1028.4 1032.1 1043.5 1043.5 DAY 26 8 9 4 15 4 8 29 28 15 14 27 MIN. QFF PRESSURE IN HPA 1011.4 1007.5 1012.9 1004.9 1002.6 995.6 993.8 996.4 1001.2 1009.8 1012.5 1013.0 993.8 DAY 4 15 31 1 12 26 30 6 9 1 8 24 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.4 -6.3 0.5 9.1 12.7 19.8 23.8 23.8 18.6 10.9 5.3 -4.9 9.0 MINIMUN AIR TEMPERATURE (C) -10.3 -11.3 -3.8 2.4 4.6 10.0 14.2 13.1 8.2 4.4 -0.9 -9.6 1.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 29 24 16 0 0 0 0 0 0 0 6 24 99 DAYS WITH FREEZING MIN.<= 0 31 28 24 9 5 0 0 0 0 1 19 30 147 TEMPERATURE RECORDS LOWEST(C) -18.5 -20.0 -14.0 -2.0 -1.0 4.4 9.0 8.8 2.2 -0.6 -7.6 -18.8 -20.0 DAY 16 5 11 12 5 1 8 24 27 30 27 17 MAXIMUM AIR TEMPERATURE (C) -1.6 -2.3 4.0 13.3 17.3 24.9 29.7 30.6 24.8 15.1 9.9 -0.9 13.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 1 16 20 4 0 0 0 41 DAYS WITH MAXIMUM TEMP. <= 0 24 16 8 0 0 0 0 0 0 0 0 21 69 TEMPERATURE RECORDS HIGHEST(C) 5.0 3.5 14.4 20.8 21.8 31.0 34.2 36.5 31.8 19.8 15.2 4.4 36.5 DAY 6 18 30 25 29 30 30 8 1 8 2 9 DIF. BETWEEN (MAX.-MIN.) (C) 8.7 9.0 7.8 10.9 12.7 14.9 15.5 17.5 16.6 10.7 10.8 8.7 12.0 MEAN DAILY TEMP. (MDT) (C) -5.9 -6.8 0.1 7.9 10.9 17.4 21.9 21.9 16.5 9.8 4.5 -5.2 7.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 2.0 43.5 42.6 2.3 0.0 0.0 0.0 90.5 HEATING DEG. DAYS(BASE 18 0C) 741.9 694.4 555.7 303.7 219.4 38.1 0.0 1.3 63.3 255.4 403.8 720.5 3997.7 DEWPOINT (MEAN C) -10.1 -11.1 -4.1 -1.2 -2.3 2.2 3.0 1.7 -2.3 1.9 -2.8 -10.0 -2.9 MIXING RATIO (G/KG) 2.38 2.30 3.78 4.63 4.30 5.90 6.21 5.76 4.28 5.71 4.07 2.47 4.32 VAPOUR PRESSURE (HPA) 2.99 2.89 4.73 5.80 5.38 7.38 7.75 7.21 5.39 7.19 5.12 3.10 5.41 SATURATION DEF. (HPA) 1.24 1.18 2.03 6.45 9.89 16.49 22.89 23.81 17.35 6.27 4.09 1.36 9.42 RELATIVE HUMIDITY (MEAN %) 72 70 74 53 39 34 29 27 28 58 59 69 51 RELATIVE HUMIDITY (MAX. %) 79 78 83 74 60 54 48 48 46 76 80 77 67 RELATIVE HUMIDITY (MIN. %) 64 62 64 38 28 22 17 15 16 44 40 61 39 RELATIVE HUMIDITY (MEAN% 03UTC) 74 75 76 73 60 54 47 48 45 76 79 71 65 RELATIVE HUMIDITY (MEAN% 09UTC) 70 66 71 47 32 27 23 21 21 51 48 66 45 RELATIVE HUMIDITY (MEAN% 15UTC) 73 72 76 50 34 27 22 18 21 55 56 69 48 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 47.7 50.1 67.9 64.5 8.0 9.6 0.0 0.7 0.0 52.7 6.0 100.5 407.7 DAYS WITH PRECIPITATION >=10 2 2 2 2 0 0 0 0 0 2 0 2 12 DAYS WITH PRECIPITATION >= 5 3 5 5 3 0 0 0 0 0 5 0 5 26 DAYS WITH PRECIPITATION >= 1 8 6 12 4 3 2 0 0 0 7 3 12 57 DAYS WITH PRECIPITATION 12 10 14 12 5 5 0 1 0 14 3 14 90 GREATEST DAILY PRECIPITATION 18.0 13.0 21.0 40.0 4.0 4.0 0.0 0.7 0.0 12.5 3.0 34.0 40.0 DAY 14 26 24 4 16 14 ** 14 ** 15 5 12 DAY WITH THUNDER STORM 0 0 1 0 2 3 0 1 0 2 0 1 10 DAYS WITH SNOW OR SLEET 9 6 9 3 0 0 0 0 0 0 0 13 40 DAYS WITH DUST 0 0 0 2 11 3 7 3 2 1 0 0 29 WIND DIRECTION (PREVAILING) 270 180 270 225 270 270 270 90 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 11.5 10.1 8.4 12.9 11.1 10.4 9.7 6.3 12.1 8.8 11.6 12.6 10.5 PREVAILING WIND PERCENT 12.9 12.9 19.4 24.7 34.2 19.3 21.3 23.2 28.0 23.9 21.3 14.8 20.2 CALMS PERCENT OF WIND 60.0 58.6 52.3 32.0 11.6 24.7 26.5 31.0 29.3 49.7 50.7 67.7 41.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 231 227 239 228 246 255 242 175 243 232 240 243 237 VECTOR WIND MAGNITUDE(KNOTS) 2.1 2.4 2.6 5.9 8.3 2.3 1.7 1.3 3.3 1.9 3.5 2.9 3.1 WIND STEADINESES (MEAN %) 65.6 63.2 66.7 76.6 79.0 35.9 26.2 25.0 47.1 41.3 66.0 80.6 55.4 WIND SPEED (MEAN KNOTS) 3.2 3.8 3.9 7.7 10.5 6.4 6.5 5.2 7.0 4.6 5.3 3.6 5.6 FASTEST WIND DIRECTION 280 170 270 220 230 270 270 340 270 100 270 260 230 FASTEST WIND SPEED (KNOTS) 19 21 19 29 33 31 17 27 27 19 31 27 33 DAY 5 17 7 16 17 21 13 13 19 1 1 28 DAYS WITH SKY CLEAR (0-2)/8 10 11 10 11 15 29 30 29 28 13 15 13 214 DAYS WITH P.CLOUDY (3-6)/8 14 11 7 14 14 1 1 2 2 12 11 7 96 DAYS WITH CLOUDY (7-8)/8 7 6 14 5 2 0 0 0 0 6 4 11 55 DAYS WITH VISIBILITY =< 2 KM 8 2 7 1 3 0 0 0 0 6 0 13 40 DURATION OF SUNSHINE HOURS 82.1 152.8 151.2 220.6 321.4 348.0 370.3 ****** 301.2 203.6 210.7 124.8 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 784.7 784.3 783.8 786.6 785.1 785.9 784.3 785.6 789.3 790.5 789.3 783.8 786.1 MAX. QFE PRESSURE IN HPA 791.9 792.7 791.4 791.8 789.5 791.0 787.9 789.1 793.0 794.2 793.7 791.2 794.2 DAY-HOUR 12- 6 15- 6 29- 6 19- 6 25- 6 23- 3 11- 6 23- 6 16- 6 13- 6 24- 6 17- 6 MIN. QFE PRESSURE IN HPA 775.9 777.4 772.0 778.3 779.1 779.2 779.6 781.3 784.1 786.0 783.3 773.4 772.0 DAY-HOUR 26- 3 4- 6 6-15 4-15 22-15 11-12 13-15 11-15 3-12 15- 3 30-15 31-15 MEAN QNH PRESSURE IN HPA 1017.5 1017.1 1016.4 1020.0 1018.1 1019.1 1017.1 1018.7 1023.2 1024.8 1023.3 1016.5 1019.3 MAX. QNH PRESSURE IN HPA 1026.5 1027.5 1025.9 1026.3 1023.5 1025.4 1021.5 1023.0 1027.8 1029.3 1028.7 1025.6 1029.3 DAY-HOUR 12- 6 15- 6 29- 6 19- 6 25- 6 23- 3 11- 6 23- 6 16- 6 13- 6 24- 6 17- 6 MIN. QNH PRESSURE IN HPA 1006.7 1008.6 1001.9 1009.7 1010.7 1010.8 1011.3 1013.4 1016.8 1019.2 1015.9 1003.6 1001.9 DAY-HOUR 26- 3 4- 6 6-15 4-15 22-15 11-12 13-15 11-15 3-12 15- 3 30-15 31-15 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 784.8 784.1 783.5 786.7 785.0 786.1 784.7 786.0 789.4 790.4 789.3 783.6 786.1 MAX. QFE PRESSURE IN HPA 791.0 791.2 789.4 790.8 789.3 791.0 787.3 788.7 792.6 793.7 792.7 790.0 793.7 DAY 13 15 29 19 25 23 12 9 16 13 24 17 MIN. QFE PRESSURE IN HPA 775.9 777.8 774.1 779.5 780.0 780.4 780.6 782.3 785.2 786.0 785.0 778.0 774.1 DAY 26 4 6 5 23 12 14 12 19 15 4 28 MEAN QNH PRESSURE IN HPA 1017.7 1016.9 1016.1 1020.0 1018.0 1019.3 1017.5 1019.1 1023.3 1024.6 1023.3 1016.3 1019.3 MAX. QNH PRESSURE IN HPA 1025.4 1025.6 1023.4 1025.1 1023.3 1025.4 1020.8 1022.5 1027.3 1028.7 1027.5 1024.1 1028.7 DAY 13 15 29 19 25 23 12 9 16 13 24 17 MIN. QNH PRESSURE IN HPA 1006.7 1009.1 1004.5 1011.2 1011.8 1012.3 1012.5 1014.6 1018.2 1019.2 1017.9 1009.3 1004.5 DAY 26 4 6 5 23 12 14 12 19 15 4 28 MEAN QFF PRESSURE IN HPA 1025.8 1025.7 1017.7 1014.6 1009.1 1004.4 999.4 1001.1 1010.6 1017.6 1021.8 1023.4 1014.3 MAX. QFF PRESSURE IN HPA 1038.5 1040.1 1030.6 1022.9 1019.0 1010.9 1004.7 1006.9 1018.5 1024.1 1028.9 1038.9 1040.1 DAY 13 15 11 14 25 23 12 14 27 21 27 17 MIN. QFF PRESSURE IN HPA 1015.7 1013.6 1006.8 1005.4 1003.0 997.5 994.3 996.0 1003.6 1010.1 1010.7 1010.6 994.3 DAY 31 21 6 9 17 11 14 12 3 15 4 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 785.3 784.6 784.2 787.2 785.6 786.5 785.1 786.5 790.0 791.2 790.1 784.3 786.7 MAX. QFE PRESSURE IN HPA 791.9 792.7 791.4 791.8 789.5 791.0 787.9 789.1 793.0 794.2 793.7 791.2 794.2 DAY 12 15 29 19 25 23 11 23 16 13 24 17 MIN. QFE PRESSURE IN HPA 777.0 777.4 773.7 779.8 780.4 780.8 781.3 782.9 785.5 787.0 784.4 778.1 773.7 DAY 25 4 6 4 22 11 15 12 19 15 4 31 MEAN QNH PRESSURE IN HPA 1018.4 1017.4 1016.9 1020.6 1018.6 1019.9 1018.0 1019.8 1024.1 1025.6 1024.3 1017.1 1020.1 MAX. QNH PRESSURE IN HPA 1026.5 1027.5 1025.9 1026.3 1023.5 1025.4 1021.5 1023.0 1027.8 1029.3 1028.7 1025.6 1029.3 DAY 12 15 29 19 25 23 11 23 16 13 24 17 MIN. QNH PRESSURE IN HPA 1008.1 1008.6 1004.0 1011.5 1012.3 1012.8 1013.4 1015.4 1018.6 1020.4 1017.2 1009.4 1004.0 DAY 25 4 6 4 22 11 15 12 19 15 4 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 784.7 784.7 784.1 787.0 785.4 786.2 784.7 786.0 789.6 790.9 789.5 784.0 786.4 MAX. QFE PRESSURE IN HPA 791.3 792.3 791.1 791.7 789.3 791.0 787.8 788.4 792.5 793.9 793.3 790.5 793.9 DAY 12 15 29 19 9 23 11 8 15 12 24 17 MIN. QFE PRESSURE IN HPA 777.1 777.4 772.8 780.0 780.4 780.0 780.6 782.7 785.3 786.8 784.2 776.6 772.8 DAY 25 4 6 4 22 11 13 11 19 15 4 31 MEAN QNH PRESSURE IN HPA 1017.6 1017.5 1016.9 1020.4 1018.5 1019.5 1017.6 1019.2 1023.7 1025.2 1023.5 1016.7 1019.7 MAX. QNH PRESSURE IN HPA 1025.7 1027.0 1025.5 1026.2 1023.3 1025.4 1021.4 1022.1 1027.2 1028.9 1028.2 1024.7 1028.9 DAY 12 15 29 19 9 23 11 8 15 12 24 17 MIN. QNH PRESSURE IN HPA 1008.2 1008.6 1002.9 1011.8 1012.3 1011.8 1012.5 1015.1 1018.3 1020.2 1017.0 1007.6 1002.9 DAY 25 4 6 4 22 11 13 11 19 15 4 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 784.1 783.9 783.6 786.2 784.9 785.5 783.8 785.0 788.6 790.1 788.7 783.4 785.7 MAX. QFE PRESSURE IN HPA 790.9 792.3 790.2 791.4 788.1 790.1 787.2 787.5 791.6 793.0 792.5 789.9 793.0 DAY 12 15 29 19 8 22 11 31 15 20 24 17 MIN. QFE PRESSURE IN HPA 776.2 777.7 772.8 778.8 779.6 779.2 779.7 781.8 784.1 786.6 783.6 773.9 772.8 DAY 25 4 6 4 22 11 15 11 3 15 4 31 MEAN QNH PRESSURE IN HPA 1016.9 1016.6 1016.2 1019.4 1017.8 1018.6 1016.4 1017.9 1022.4 1024.2 1022.5 1016.0 1018.8 MAX. QNH PRESSURE IN HPA 1025.2 1027.0 1024.4 1025.9 1021.8 1024.2 1020.7 1021.0 1026.1 1027.8 1027.2 1024.0 1027.8 DAY 12 15 29 19 8 22 11 31 15 20 24 17 MIN. QNH PRESSURE IN HPA 1007.1 1008.9 1002.9 1010.3 1011.3 1010.8 1011.4 1014.0 1016.8 1019.9 1016.2 1004.2 1002.9 DAY 25 4 6 4 22 11 15 11 3 15 4 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 784.4 784.3 783.6 786.2 784.9 785.3 783.5 784.8 788.8 790.2 789.1 783.8 785.7 MAX. QFE PRESSURE IN HPA 791.4 792.2 790.2 790.9 788.8 790.4 786.9 788.2 791.7 793.3 792.5 790.1 793.3 DAY 12 15 29 19 8 22 11 31 15 27 24 17 MIN. QFE PRESSURE IN HPA 776.5 778.7 772.0 778.3 779.1 779.5 779.6 781.3 784.6 786.8 783.3 773.4 772.0 DAY 25 6 6 4 22 11 13 11 3 15 30 31 MEAN QNH PRESSURE IN HPA 1017.2 1017.1 1016.2 1019.5 1017.8 1018.3 1016.1 1017.7 1022.6 1024.4 1023.0 1016.5 1018.8 MAX. QNH PRESSURE IN HPA 1025.9 1026.8 1024.4 1025.2 1022.6 1024.6 1020.3 1021.9 1026.2 1028.2 1027.2 1024.2 1028.2 DAY 12 15 29 19 8 22 11 31 15 27 24 17 MIN. QNH PRESSURE IN HPA 1007.5 1010.2 1001.9 1009.7 1010.7 1011.2 1011.3 1013.4 1017.5 1020.2 1015.9 1003.6 1001.9 DAY 25 6 6 4 22 11 13 11 3 15 30 31 MEAN QFF PRESSURE IN HPA 1025.3 1025.9 1017.6 1013.8 1009.0 1003.3 997.9 999.9 1010.0 1017.3 1021.5 1023.8 1013.8 MAX. QFF PRESSURE IN HPA 1035.9 1039.3 1029.6 1020.8 1017.3 1009.9 1004.0 1006.8 1016.0 1023.1 1027.9 1040.7 1040.7 DAY 13 15 11 13 4 22 11 13 26 21 27 17 MIN. QFF PRESSURE IN HPA 1014.3 1013.8 1003.5 1004.0 999.9 996.9 993.6 994.9 1001.8 1011.6 1013.4 1011.0 993.6 DAY 31 20 6 9 16 26 22 5 3 14 30 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -8.6 -7.0 -5.1 4.4 9.8 17.2 23.4 20.4 16.5 12.0 4.0 -4.1 6.9 MINIMUN AIR TEMPERATURE (C) -13.8 -11.7 -11.1 -0.8 4.1 8.4 12.5 11.3 6.4 2.6 -2.2 -9.5 -0.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 31 27 24 7 0 0 0 0 0 0 8 27 124 DAYS WITH FREEZING MIN.<= 0 31 29 31 16 3 0 0 0 1 5 18 31 165 TEMPERATURE RECORDS LOWEST(C) -21.6 -18.6 -20.6 -7.0 -0.8 4.2 7.2 5.4 0.0 -2.6 -15.6 -19.6 -21.6 DAY 4 16 11 3 2 5 12 12 30 8 27 27 MAXIMUM AIR TEMPERATURE (C) -4.5 -3.5 -1.1 8.2 13.8 21.6 29.1 26.1 21.9 17.3 8.1 -0.9 11.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 15 3 0 0 0 0 18 DAYS WITH MAXIMUM TEMP. <= 0 29 25 20 0 0 0 0 0 0 0 3 21 98 TEMPERATURE RECORDS HIGHEST(C) 0.8 1.4 6.2 13.8 23.2 29.0 31.8 30.0 26.0 21.4 15.2 4.4 31.8 DAY 21 18 30 30 29 30 25 5 2 3 20 12 DIF. BETWEEN (MAX.-MIN.) (C) 9.3 8.2 10.0 9.0 9.7 13.2 16.6 14.8 15.5 14.7 10.3 8.6 11.6 MEAN DAILY TEMP. (MDT) (C) -9.1 -7.6 -6.1 3.7 8.9 15.0 20.8 18.7 14.2 10.0 3.0 -5.2 5.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.0 22.0 3.3 0.0 0.0 0.0 0.0 25.3 HEATING DEG. DAYS(BASE 18 0C) 841.6 743.1 747.8 428.7 280.7 96.6 4.8 25.8 115.0 249.2 451.3 719.4 4704.0 DEWPOINT (MEAN C) -14.0 -11.2 -9.9 -2.6 2.6 3.1 2.2 3.7 -1.9 -2.4 -3.6 -8.1 -3.5 MIXING RATIO (G/KG) 1.81 2.24 2.51 4.13 6.01 6.24 5.91 6.67 4.32 4.19 3.93 2.85 4.23 VAPOUR PRESSURE (HPA) 2.27 2.79 3.14 5.17 7.52 7.80 7.38 8.35 5.44 5.28 4.95 3.57 5.31 SATURATION DEF. (HPA) 1.09 0.97 1.33 3.51 5.19 12.48 22.69 16.77 14.32 9.35 3.78 1.14 7.72 RELATIVE HUMIDITY (MEAN %) 67 73 70 63 64 43 28 38 31 40 62 75 55 RELATIVE HUMIDITY (MAX. %) 75 80 78 79 82 68 46 58 52 59 76 82 70 RELATIVE HUMIDITY (MIN. %) 58 67 62 51 51 29 17 26 20 28 48 69 44 RELATIVE HUMIDITY (MEAN% 03UTC) 70 76 74 74 81 67 46 57 51 58 71 79 67 RELATIVE HUMIDITY (MEAN% 09UTC) 62 71 66 58 59 34 23 32 25 33 54 72 49 RELATIVE HUMIDITY (MEAN% 15UTC) 69 73 71 62 61 35 20 30 26 36 65 75 52 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.0 75.4 61.2 87.7 70.4 19.5 0.0 13.9 0.2 0.0 60.8 23.4 451.5 DAYS WITH PRECIPITATION >=10 0 1 3 3 2 0 0 0 0 0 1 1 11 DAYS WITH PRECIPITATION >= 5 3 6 7 3 8 2 0 2 0 0 3 1 35 DAYS WITH PRECIPITATION >= 1 11 13 8 9 12 3 0 2 0 0 5 5 68 DAYS WITH PRECIPITATION 19 19 15 11 20 6 0 4 1 0 8 17 120 GREATEST DAILY PRECIPITATION 7.0 30.0 13.0 47.0 12.0 9.0 0.0 8.0 0.2 0.0 44.0 11.0 47.0 DAY 3 24 10 18 6 2 ** 29 13 ** 8 3 DAY WITH THUNDER STORM 0 0 0 1 5 3 0 2 0 0 0 0 11 DAYS WITH SNOW OR SLEET 14 14 8 5 3 0 0 0 0 0 4 14 62 DAYS WITH DUST 0 0 0 0 0 0 1 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 90 90 270 270 225 180 270 PREVAILING WIND SPEED(KNOTS) 15.2 17.1 12.3 10.9 15.4 12.9 7.6 10.0 11.7 15.0 14.8 10.4 13.6 PREVAILING WIND PERCENT 14.8 20.7 13.5 28.7 20.6 28.0 12.3 20.6 14.7 27.1 19.3 7.7 17.2 CALMS PERCENT OF WIND 55.5 48.3 71.0 42.7 38.7 40.7 41.3 45.2 44.7 45.2 48.7 64.5 48.9 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 254 224 254 241 239 253 224 23 236 262 235 222 242 VECTOR WIND MAGNITUDE(KNOTS) 3.3 6.3 2.0 5.2 3.7 4.6 2.3 0.6 3.0 5.7 4.8 2.1 3.4 WIND STEADINESES (MEAN %) 61.1 67.7 60.6 72.2 47.4 69.7 34.3 9.8 44.8 77.0 72.7 56.8 53.1 WIND SPEED (MEAN KNOTS) 5.4 9.3 3.3 7.2 7.8 6.6 6.7 6.1 6.7 7.4 6.6 3.7 6.4 FASTEST WIND DIRECTION 270 180 270 200 270 290 240 320 240 220 190 280 270 FASTEST WIND SPEED (KNOTS) 35 39 35 39 43 35 33 29 39 43 41 37 43 DAY 8 7 3 22 19 19 10 28 27 10 24 28 DAYS WITH SKY CLEAR (0-2)/8 10 7 10 9 5 19 26 27 26 25 12 5 181 DAYS WITH P.CLOUDY (3-6)/8 14 11 14 13 15 10 4 4 4 6 15 14 124 DAYS WITH CLOUDY (7-8)/8 7 11 7 8 11 1 1 0 0 0 3 12 61 DAYS WITH VISIBILITY =< 2 KM 7 8 10 4 4 1 0 0 0 0 2 8 44 DURATION OF SUNSHINE HOURS 161.7 128.5 180.4 228.8 204.2 314.7 354.6 343.0 315.3 294.6 199.3 93.3 2818.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 783.1 780.5 783.6 784.4 786.3 785.6 785.3 787.5 789.3 790.0 788.5 784.4 785.7 MAX. QFE PRESSURE IN HPA 792.0 788.4 792.8 788.8 792.7 790.8 790.4 792.1 793.4 793.9 796.0 790.1 796.0 DAY-HOUR 10- 6 15-15 12- 9 21- 6 29- 9 11- 6 6- 6 31- 6 2- 6 29- 6 4- 6 1- 6 MIN. QFE PRESSURE IN HPA 770.7 772.1 775.0 776.4 778.6 781.8 781.1 782.0 785.8 786.5 776.9 780.3 770.7 DAY-HOUR 30-12 24-12 30-12 18- 3 9-12 17- 3 31-15 18-15 17-12 6-12 25- 3 27-15 MEAN QNH PRESSURE IN HPA 1015.6 1012.4 1016.2 1017.2 1019.6 1018.6 1018.4 1021.0 1023.2 1024.1 1022.2 1017.2 1018.8 MAX. QNH PRESSURE IN HPA 1026.6 1022.1 1027.6 1022.6 1027.5 1025.1 1024.6 1026.7 1028.3 1028.9 1031.5 1024.2 1031.5 DAY-HOUR 10- 6 15-15 12- 9 21- 6 29- 9 11- 6 6- 6 31- 6 2- 6 29- 6 4- 6 1- 6 MIN. QNH PRESSURE IN HPA 1000.3 1002.0 1005.6 1007.3 1010.0 1014.0 1013.1 1014.2 1018.9 1019.8 1007.9 1012.1 1000.3 DAY-HOUR 30-12 24-12 30-12 18- 3 9-12 17- 3 31-15 18-15 17-12 6-12 25- 3 27-15 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 782.7 780.3 783.2 784.0 786.2 785.6 785.6 787.7 789.4 790.0 788.2 784.2 785.6 MAX. QFE PRESSURE IN HPA 791.0 787.9 791.0 788.0 791.7 790.1 789.4 791.4 792.5 793.0 795.0 789.0 795.0 DAY 10 16 12 8 29 11 6 16 2 29 4 1 MIN. QFE PRESSURE IN HPA 774.1 775.0 775.0 776.4 779.0 781.8 783.0 782.6 786.2 787.5 776.9 781.5 774.1 DAY 31 8 31 18 4 17 10 1 18 7 25 27 MEAN QNH PRESSURE IN HPA 1015.1 1012.1 1015.7 1016.7 1019.5 1018.6 1018.7 1021.3 1023.4 1024.1 1021.9 1016.9 1018.7 MAX. QNH PRESSURE IN HPA 1025.4 1021.5 1025.4 1021.7 1026.2 1024.2 1023.4 1025.9 1027.2 1027.8 1030.3 1022.9 1030.3 DAY 10 16 12 8 29 11 6 16 2 29 4 1 MIN. QNH PRESSURE IN HPA 1004.5 1005.6 1005.6 1007.3 1010.5 1014.0 1015.5 1015.0 1019.4 1021.0 1007.9 1013.6 1004.5 DAY 31 8 31 18 4 17 10 1 18 7 25 27 MEAN QFF PRESSURE IN HPA 1026.3 1021.1 1023.9 1015.0 1012.7 1005.9 1001.3 1005.9 1012.4 1017.4 1021.1 1023.0 1015.5 MAX. QFF PRESSURE IN HPA 1040.3 1035.4 1043.7 1024.5 1020.1 1012.0 1006.8 1015.8 1020.6 1025.2 1029.4 1033.8 1043.7 DAY 5 16 12 8 14 11 6 12 29 29 27 29 MIN. QFF PRESSURE IN HPA 1013.0 1006.9 1005.9 1007.2 1006.5 999.3 996.2 995.7 1007.9 1012.9 1010.7 1014.5 995.7 DAY 1 24 31 18 9 28 27 1 17 24 25 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 783.6 781.0 784.0 784.8 786.8 786.0 786.0 788.2 790.1 790.7 789.2 785.0 786.3 MAX. QFE PRESSURE IN HPA 792.0 788.1 792.0 788.8 792.4 790.8 790.4 792.1 793.4 793.9 796.0 790.1 796.0 DAY 10 16 12 21 29 11 6 31 2 29 4 1 MIN. QFE PRESSURE IN HPA 774.4 774.5 776.6 777.9 780.2 782.6 783.0 783.3 786.6 788.0 778.4 782.1 774.4 DAY 30 24 31 18 9 17 19 1 25 26 25 3 MEAN QNH PRESSURE IN HPA 1016.2 1013.0 1016.8 1017.7 1020.1 1019.1 1019.2 1021.9 1024.2 1025.0 1023.1 1018.0 1019.5 MAX. QNH PRESSURE IN HPA 1026.6 1021.8 1026.6 1022.6 1027.1 1025.1 1024.6 1026.7 1028.3 1028.9 1031.5 1024.2 1031.5 DAY 10 16 12 21 29 11 6 31 2 29 4 1 MIN. QNH PRESSURE IN HPA 1004.9 1005.0 1007.6 1009.2 1012.0 1015.0 1015.5 1015.9 1019.9 1021.7 1009.8 1014.4 1004.9 DAY 30 24 31 18 9 17 19 1 25 26 25 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 783.3 780.8 784.1 784.8 786.7 785.8 785.7 787.8 789.5 790.2 788.6 784.6 786.0 MAX. QFE PRESSURE IN HPA 791.8 787.6 792.8 788.3 792.7 790.8 790.1 791.9 792.9 793.2 795.3 789.8 795.3 DAY 10 16 12 8 29 11 6 31 2 29 4 1 MIN. QFE PRESSURE IN HPA 772.3 773.0 776.2 780.1 780.0 783.3 782.6 783.4 786.5 787.1 778.9 781.2 772.3 DAY 30 24 23 18 9 27 20 1 17 26 25 27 MEAN QNH PRESSURE IN HPA 1015.9 1012.8 1016.8 1017.7 1020.0 1019.0 1018.8 1021.5 1023.5 1024.3 1022.4 1017.4 1019.2 MAX. QNH PRESSURE IN HPA 1026.3 1021.2 1027.6 1022.0 1027.5 1025.1 1024.2 1026.5 1027.7 1028.1 1030.7 1023.9 1030.7 DAY 10 16 12 8 29 11 6 31 2 29 4 1 MIN. QNH PRESSURE IN HPA 1002.3 1003.1 1007.1 1011.9 1011.8 1015.9 1015.0 1016.0 1019.8 1020.5 1010.4 1013.3 1002.3 DAY 30 24 23 18 9 27 20 1 17 26 25 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 782.7 780.2 783.3 784.2 786.0 785.4 784.8 786.9 788.7 789.4 788.1 784.0 785.3 MAX. QFE PRESSURE IN HPA 791.1 787.3 791.8 788.0 791.3 790.0 789.7 791.2 792.3 792.7 794.0 789.0 794.0 DAY 9 15 12 21 29 11 6 31 2 29 4 1 MIN. QFE PRESSURE IN HPA 770.7 772.1 775.0 780.8 778.6 782.3 781.4 782.2 785.8 786.5 779.1 780.8 770.7 DAY 30 24 30 17 9 27 31 18 17 6 25 27 MEAN QNH PRESSURE IN HPA 1015.1 1012.0 1015.9 1017.0 1019.2 1018.4 1017.7 1020.2 1022.5 1023.4 1021.7 1016.7 1018.3 MAX. QNH PRESSURE IN HPA 1025.5 1020.8 1026.3 1021.7 1025.7 1024.1 1023.8 1025.6 1027.0 1027.5 1029.1 1022.9 1029.1 DAY 9 15 12 21 29 11 6 31 2 29 4 1 MIN. QNH PRESSURE IN HPA 1000.3 1002.0 1005.6 1012.8 1010.0 1014.6 1013.5 1014.5 1018.9 1019.8 1010.7 1012.8 1000.3 DAY 30 24 30 17 9 27 31 18 17 6 25 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 ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 783.1 780.5 783.4 784.2 786.1 785.1 784.7 786.8 788.8 789.7 788.4 784.4 785.4 MAX. QFE PRESSURE IN HPA 791.5 788.4 791.2 787.9 791.2 790.3 789.4 791.0 792.0 793.1 794.2 789.0 794.2 DAY 9 15 12 20 29 10 6 31 2 29 4 1 MIN. QFE PRESSURE IN HPA 771.0 774.0 775.6 779.2 780.0 782.2 781.1 782.0 786.1 786.6 779.8 780.3 771.0 DAY 30 24 30 17 9 27 31 18 17 6 25 27 MEAN QNH PRESSURE IN HPA 1015.6 1012.4 1016.0 1016.9 1019.3 1018.1 1017.6 1020.2 1022.6 1023.8 1022.1 1017.2 1018.5 MAX. QNH PRESSURE IN HPA 1026.0 1022.1 1025.6 1021.5 1025.6 1024.5 1023.4 1025.4 1026.6 1027.9 1029.3 1022.9 1029.3 DAY 9 15 12 20 29 10 6 31 2 29 4 1 MIN. QNH PRESSURE IN HPA 1000.7 1004.4 1006.3 1010.8 1011.8 1014.5 1013.1 1014.2 1019.3 1019.9 1011.5 1012.1 1000.7 DAY 30 24 30 17 9 27 31 18 17 6 25 27 MEAN QFF PRESSURE IN HPA 1026.8 1021.5 1023.9 1015.0 1012.3 1005.3 1000.2 1005.0 1011.6 1017.1 1021.4 1023.4 1015.3 MAX. QFF PRESSURE IN HPA 1041.6 1033.8 1041.8 1022.6 1020.5 1012.1 1006.9 1014.3 1019.2 1025.1 1029.1 1036.4 1041.8 DAY 9 29 11 19 2 10 6 31 29 29 18 28 MIN. QFF PRESSURE IN HPA 1011.4 1005.9 1004.9 1008.4 1006.0 998.5 993.5 997.5 1005.8 1011.4 1009.7 1014.0 993.5 DAY 30 24 30 14 9 27 31 1 13 5 22 15 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 ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -6.0 -5.4 -1.4 7.2 10.0 16.4 20.5 19.9 17.5 10.0 0.0 -0.2 7.4 MINIMUN AIR TEMPERATURE (C) -10.9 -11.8 -7.1 0.5 4.2 8.0 12.6 11.9 8.9 3.2 -4.2 -5.0 0.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 31 26 24 1 0 0 0 0 0 0 13 22 117 DAYS WITH FREEZING MIN.<= 0 31 28 31 13 5 0 0 0 0 2 24 30 164 TEMPERATURE RECORDS LOWEST(C) -19.6 -22.6 -16.0 -4.6 -2.5 3.0 8.0 8.4 4.2 -1.2 -16.5 -11.0 -22.6 DAY 20 16 13 23 6 22 5 24 30 8 15 13 MAXIMUM AIR TEMPERATURE (C) -2.8 -1.9 2.4 11.4 15.3 23.3 28.2 27.6 25.7 15.4 3.6 3.3 12.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 1 5 3 1 0 0 0 10 DAYS WITH MAXIMUM TEMP. <= 0 26 18 10 0 0 0 0 0 0 0 8 3 65 TEMPERATURE RECORDS HIGHEST(C) 2.2 5.0 11.2 20.8 21.0 30.4 32.0 31.2 30.0 22.6 14.0 7.2 32.0 DAY 27 27 31 19 19 30 16 14 6 1 8 23 DIF. BETWEEN (MAX.-MIN.) (C) 8.1 9.9 9.5 10.9 11.1 15.3 15.6 15.7 16.8 12.2 7.8 8.3 11.8 MEAN DAILY TEMP. (MDT) (C) -6.9 -6.9 -2.4 6.0 9.7 15.6 20.4 19.7 17.3 9.3 -0.3 -0.9 6.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.0 10.9 1.3 0.4 0.0 0.0 0.0 12.6 HEATING DEG. DAYS(BASE 18 0C) 771.4 695.9 631.4 361.4 255.8 78.7 1.8 1.9 34.3 269.3 549.6 584.7 4236.3 DEWPOINT (MEAN C) -9.5 -9.0 -6.3 -1.2 3.2 2.1 2.9 4.9 2.0 -2.1 -2.4 -4.6 -1.7 MIXING RATIO (G/KG) 2.49 2.63 3.15 4.58 6.28 5.79 6.21 7.05 6.01 4.26 4.34 3.58 4.70 VAPOUR PRESSURE (HPA) 3.13 3.30 3.95 5.74 7.86 7.25 7.77 8.83 7.53 5.39 5.45 4.51 5.89 SATURATION DEF. (HPA) 0.90 1.02 1.85 4.83 4.93 12.43 17.35 15.26 13.48 7.45 1.05 1.63 6.85 RELATIVE HUMIDITY (MEAN %) 78 76 71 60 66 42 35 40 38 47 86 74 59 RELATIVE HUMIDITY (MAX. %) 84 84 81 80 84 62 53 59 58 64 93 83 74 RELATIVE HUMIDITY (MIN. %) 70 68 60 45 45 27 20 25 24 34 77 65 47 RELATIVE HUMIDITY (MEAN% 03UTC) 79 79 75 78 79 58 50 55 54 61 90 77 70 RELATIVE HUMIDITY (MEAN% 09UTC) 75 74 68 54 53 30 25 30 32 38 86 74 53 RELATIVE HUMIDITY (MEAN% 15UTC) 79 77 71 57 57 30 23 29 29 44 85 73 55 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.7 39.5 61.1 81.1 67.5 6.6 21.8 2.2 0.0 39.7 214.9 41.4 616.5 DAYS WITH PRECIPITATION >=10 1 1 2 3 2 0 0 0 0 1 5 2 17 DAYS WITH PRECIPITATION >= 5 3 3 5 7 5 1 3 0 0 1 7 3 38 DAYS WITH PRECIPITATION >= 1 5 7 11 10 9 1 3 0 0 3 13 5 67 DAYS WITH PRECIPITATION 12 10 16 13 17 4 6 4 0 6 17 6 111 GREATEST DAILY PRECIPITATION 23.0 12.0 16.0 23.0 23.0 6.0 8.0 0.9 0.0 34.0 54.0 17.0 54.0 DAY 8 3 8 7 6 1 13 3 ** 29 2 15 DAY WITH THUNDER STORM 0 0 0 2 2 1 3 3 0 0 0 0 11 DAYS WITH SNOW OR SLEET 11 11 11 1 1 0 0 0 0 0 8 5 48 DAYS WITH DUST 0 0 0 0 0 4 0 1 0 0 0 1 6 WIND DIRECTION (PREVAILING) 270 270 225 270 225 270 315 270 270 270 315 270 270 PREVAILING WIND SPEED(KNOTS) 17.2 12.7 14.4 17.0 11.1 11.4 12.1 10.5 8.9 9.0 13.2 12.1 12.5 PREVAILING WIND PERCENT 14.2 15.0 14.2 27.3 15.4 15.8 7.7 9.7 21.3 10.7 7.3 18.7 13.3 CALMS PERCENT OF WIND 52.3 52.1 58.1 35.3 55.5 59.6 66.9 63.3 54.6 67.2 78.0 71.6 59.8 NO. OF WIND OBSERVATION 155 140 155 150 247 240 248 248 240 177 150 155 2305 VECTOR WIND DIRECTION (MEAN) 258 259 254 255 243 254 268 257 261 240 267 269 256 VECTOR WIND MAGNITUDE(KNOTS) 4.8 3.6 3.8 7.7 3.4 3.1 0.6 0.9 3.2 1.3 1.6 3.1 3.1 WIND STEADINESES (MEAN %) 69.6 66.7 62.3 79.4 66.7 67.4 17.1 25.0 72.7 44.8 69.6 93.9 64.6 WIND SPEED (MEAN KNOTS) 6.9 5.4 6.1 9.7 5.1 4.6 3.5 3.6 4.4 2.9 2.3 3.3 4.8 FASTEST WIND DIRECTION 240 270 310 280 270 240 270 330 240 270 300 270 240 FASTEST WIND SPEED (KNOTS) 54 29 49 49 43 39 31 31 29 29 49 29 54 DAY 8 28 22 14 16 3 27 8 21 1 14 2 DAYS WITH SKY CLEAR (0-2)/8 15 10 12 3 7 26 27 23 28 22 7 10 190 DAYS WITH P.CLOUDY (3-6)/8 6 9 11 17 12 4 4 8 2 7 7 13 100 DAYS WITH CLOUDY (7-8)/8 10 9 8 10 12 0 0 0 0 2 16 8 75 DAYS WITH VISIBILITY =< 2 KM 9 9 7 1 2 0 0 0 0 0 16 7 51 DURATION OF SUNSHINE HOURS 151.4 160.1 231.0 208.6 213.3 379.4 349.4 336.7 328.4 255.3 102.1 158.1 2873.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 784.5 784.0 784.0 785.3 786.9 786.5 786.4 787.7 788.3 791.7 787.1 788.7 786.8 MAX. QFE PRESSURE IN HPA 791.1 789.7 793.3 792.6 791.5 792.9 790.8 791.2 792.6 797.1 794.2 795.6 797.1 DAY-HOUR 6- 6 9- 6 31- 6 17- 6 18-18 22- 6 27- 6 30- 9 16- 6 17- 6 21- 6 26- 6 MIN. QFE PRESSURE IN HPA 773.7 775.5 775.4 779.8 778.2 780.1 780.6 783.9 785.1 784.2 776.9 781.3 773.7 DAY-HOUR 8- 3 3- 3 5-15 26-12 12- 3 3-12 11-15 13-12 7-12 28-12 11- 3 5-12 MEAN QNH PRESSURE IN HPA 1017.3 1016.7 1016.7 1018.3 1020.3 1019.8 1019.7 1021.3 1022.1 1026.2 1020.6 1022.5 1020.1 MAX. QNH PRESSURE IN HPA 1025.5 1023.8 1028.2 1027.3 1026.0 1027.7 1025.1 1025.6 1027.3 1032.9 1029.3 1031.0 1032.9 DAY-HOUR 6- 6 9- 6 31- 6 17- 6 18-18 22- 6 27- 6 30- 9 16- 6 17- 6 21- 6 26- 6 MIN. QNH PRESSURE IN HPA 1004.0 1006.2 1006.1 1011.5 1009.6 1011.9 1012.5 1016.6 1018.1 1017.0 1007.9 1013.4 1004.0 DAY-HOUR 8- 3 3- 3 5-15 26-12 12- 3 3-12 11-15 13-12 7-12 28-12 11- 3 5-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1011.6 1005.6 1002.1 1004.2 1007.0 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1021.0 1018.2 1007.4 1010.1 1014.8 ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** 9- 3 22- 6 27- 9 24- 3 30-15 **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1000.4 999.4 994.1 998.4 1000.0 ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** 12- 3 25-15 11-12 13-12 8-12 **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 786.4 786.2 786.4 787.7 788.2 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 791.4 791.9 789.8 790.1 792.0 ****** ****** ****** ****** DAY ** ** ** ** 19 23 28 29 16 ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 779.8 782.0 781.9 784.3 785.3 ****** ****** ****** ****** DAY ** ** ** ** 12 4 12 13 29 ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1019.7 1019.5 1019.7 1021.3 1021.9 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1025.9 1026.5 1023.9 1024.2 1026.6 ****** ****** ****** ****** DAY ** ** ** ** 19 23 28 29 16 ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1011.5 1014.2 1014.1 1017.1 1018.3 ****** ****** ****** ****** DAY ** ** ** ** 12 4 12 13 29 ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.8 1005.6 1001.9 1003.8 1006.3 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1020.7 1015.7 1006.6 1008.6 1012.6 ****** ****** ****** ****** DAY ** ** ** ** 9 22 21 24 16 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1002.2 1000.8 996.5 999.6 1001.9 ****** ****** ****** ****** DAY ** ** ** ** 12 27 12 14 9 ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 784.2 783.6 783.8 785.2 786.5 786.4 786.6 787.9 788.4 791.9 786.8 788.4 786.6 MAX. QFE PRESSURE IN HPA 789.8 788.4 792.5 791.8 790.7 792.2 790.0 790.4 792.0 796.5 793.0 794.3 796.5 DAY 27 10 31 17 19 22 21 30 16 18 21 26 MIN. QFE PRESSURE IN HPA 773.7 775.5 776.8 780.5 778.2 782.2 782.4 784.5 786.2 786.4 776.9 781.4 773.7 DAY 8 3 8 27 12 3 11 13 3 28 11 5 MEAN QNH PRESSURE IN HPA 1017.0 1016.2 1016.5 1018.2 1019.8 1019.7 1019.9 1021.6 1022.1 1026.4 1020.1 1022.1 1020.0 MAX. QNH PRESSURE IN HPA 1023.9 1022.1 1027.2 1026.3 1025.0 1026.8 1024.1 1024.6 1026.6 1032.1 1027.8 1029.4 1032.1 DAY 27 10 31 17 19 22 21 30 16 18 21 26 MIN. QNH PRESSURE IN HPA 1004.0 1006.2 1007.8 1012.4 1009.6 1014.5 1014.7 1017.3 1019.4 1019.7 1007.9 1013.5 1004.0 DAY 8 3 8 27 12 3 11 13 3 28 11 5 MEAN QFF PRESSURE IN HPA 1025.2 1023.9 1020.3 1014.1 1011.8 1005.8 1002.6 1005.5 1008.5 1020.2 1021.8 1024.4 1015.3 MAX. QFF PRESSURE IN HPA 1037.7 1034.4 1033.8 1020.2 1021.0 1017.4 1007.1 1010.1 1014.1 1025.0 1034.5 1032.3 1037.7 DAY 20 16 23 1 9 22 28 24 16 20 30 26 MIN. QFF PRESSURE IN HPA 1006.4 1007.2 1007.2 1005.5 1000.4 1000.9 996.9 1001.1 1004.2 1012.1 1005.4 1016.1 996.9 DAY 8 3 8 20 12 26 11 10 8 28 11 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 785.1 784.6 784.7 785.7 787.2 786.9 787.0 788.4 789.0 792.7 787.8 789.3 787.4 MAX. QFE PRESSURE IN HPA 791.1 789.7 793.3 792.6 790.6 792.9 790.8 791.1 792.6 797.1 794.2 795.6 797.1 DAY 6 9 31 17 9 22 27 30 16 17 21 26 MIN. QFE PRESSURE IN HPA 775.0 776.0 778.3 781.0 778.8 781.8 782.7 784.9 786.7 786.0 778.3 782.0 775.0 DAY 8 3 8 26 12 3 11 13 3 28 11 5 MEAN QNH PRESSURE IN HPA 1018.1 1017.4 1017.5 1018.8 1020.7 1020.4 1020.4 1022.1 1022.9 1027.5 1021.3 1023.2 1020.9 MAX. QNH PRESSURE IN HPA 1025.5 1023.8 1028.2 1027.3 1024.9 1027.7 1025.1 1025.5 1027.3 1032.9 1029.3 1031.0 1032.9 DAY 6 9 31 17 9 22 27 30 16 17 21 26 MIN. QNH PRESSURE IN HPA 1005.6 1006.8 1009.7 1013.0 1010.3 1014.0 1015.1 1017.8 1020.0 1019.2 1009.7 1014.2 1005.6 DAY 8 3 8 26 12 3 11 13 3 28 11 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.1 1006.3 1002.7 1005.1 1007.7 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1021.0 1018.2 1007.3 1008.9 1014.2 ****** ****** ****** ****** DAY ** ** ** ** 9 22 21 24 16 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1002.2 1000.7 997.5 999.9 1001.9 ****** ****** ****** ****** DAY ** ** ** ** 12 27 11 14 7 ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 784.8 784.5 784.5 785.6 787.3 786.8 786.7 788.0 788.6 792.2 787.4 788.9 787.1 MAX. QFE PRESSURE IN HPA 790.8 789.7 793.1 792.1 790.5 792.9 790.6 791.2 792.0 796.8 794.0 794.9 796.8 DAY 6 9 31 16 18 22 27 30 16 17 21 26 MIN. QFE PRESSURE IN HPA 774.2 776.2 777.9 781.0 781.5 781.0 781.9 784.8 786.1 784.7 779.0 781.5 774.2 DAY 8 3 5 26 6 3 11 11 3 28 11 5 MEAN QNH PRESSURE IN HPA 1017.7 1017.3 1017.4 1018.6 1020.8 1020.1 1020.0 1021.7 1022.4 1026.9 1020.9 1022.7 1020.5 MAX. QNH PRESSURE IN HPA 1025.1 1023.8 1027.9 1026.7 1024.7 1027.7 1024.9 1025.6 1026.6 1032.5 1029.1 1030.2 1032.5 DAY 6 9 31 16 18 22 27 30 16 17 21 26 MIN. QNH PRESSURE IN HPA 1004.6 1007.1 1009.2 1013.0 1013.6 1013.0 1014.1 1017.7 1019.3 1017.6 1010.5 1013.6 1004.6 DAY 8 3 5 26 6 3 11 11 3 28 11 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1011.7 1005.7 1002.1 1004.1 1006.3 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1019.1 1016.6 1007.4 1007.3 1012.4 ****** ****** ****** ****** DAY ** ** ** ** 9 22 27 24 16 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1002.9 1000.7 996.1 998.9 1000.3 ****** ****** ****** ****** DAY ** ** ** ** 31 3 11 14 7 ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 784.1 783.6 783.6 784.9 786.8 786.2 785.9 787.1 787.7 791.4 786.8 788.3 786.4 MAX. QFE PRESSURE IN HPA 789.5 789.1 792.3 791.8 790.5 792.5 789.2 789.7 791.0 796.0 793.1 794.9 796.0 DAY 6 9 30 16 18 22 26 30 19 17 21 26 MIN. QFE PRESSURE IN HPA 775.0 776.0 776.2 779.8 781.1 780.1 780.7 783.9 785.1 784.2 779.0 781.3 775.0 DAY 8 3 5 26 6 3 11 13 7 28 13 5 MEAN QNH PRESSURE IN HPA 1016.8 1016.2 1016.2 1017.8 1020.2 1019.4 1019.1 1020.5 1021.2 1025.8 1020.2 1022.0 1019.6 MAX. QNH PRESSURE IN HPA 1023.5 1023.0 1027.0 1026.3 1024.7 1027.2 1023.1 1023.8 1025.4 1031.5 1027.9 1030.2 1031.5 DAY 6 9 30 16 18 22 26 30 19 17 21 26 MIN. QNH PRESSURE IN HPA 1005.6 1006.8 1007.1 1011.5 1013.1 1011.9 1012.6 1016.6 1018.1 1017.0 1010.5 1013.4 1005.6 DAY 8 3 5 26 6 3 11 13 7 28 13 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1011.4 1005.4 1001.4 1002.9 1005.5 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1018.3 1016.1 1005.7 1006.8 1010.6 ****** ****** ****** ****** DAY ** ** ** ** 8 22 26 24 30 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1001.7 999.8 994.1 998.4 1000.0 ****** ****** ****** ****** DAY ** ** ** ** 31 3 11 13 8 ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 784.3 783.8 783.6 785.0 786.7 786.0 785.6 786.9 787.7 791.4 786.9 788.8 786.4 MAX. QFE PRESSURE IN HPA 790.0 789.4 792.2 791.9 790.4 792.2 789.2 789.4 791.0 796.0 793.0 795.2 796.0 DAY 6 9 30 16 18 22 27 30 15 17 21 26 MIN. QFE PRESSURE IN HPA 775.8 776.7 775.4 780.4 780.9 780.1 780.6 784.0 785.1 784.8 778.4 782.7 775.4 DAY 8 3 5 26 6 3 11 12 8 28 13 4 MEAN QNH PRESSURE IN HPA 1017.1 1016.4 1016.2 1017.9 1020.1 1019.2 1018.7 1020.3 1021.3 1025.9 1020.3 1022.6 1019.7 MAX. QNH PRESSURE IN HPA 1024.1 1023.4 1026.8 1026.5 1024.6 1026.8 1023.1 1023.4 1025.4 1031.5 1027.8 1030.5 1031.5 DAY 6 9 30 16 18 22 27 30 15 17 21 26 MIN. QNH PRESSURE IN HPA 1006.6 1007.7 1006.1 1012.3 1012.9 1011.9 1012.5 1016.7 1018.1 1017.7 1009.8 1015.1 1006.1 DAY 8 3 5 26 6 3 11 12 8 28 13 4 MEAN QFF PRESSURE IN HPA 1025.3 1023.9 1019.8 1013.8 1011.9 1005.2 1001.6 1004.0 1007.6 1019.8 1022.1 1024.8 1015.0 MAX. QFF PRESSURE IN HPA 1038.5 1039.0 1032.6 1019.7 1018.9 1015.9 1006.4 1007.5 1014.8 1023.9 1032.5 1032.9 1039.0 DAY 20 16 23 16 8 22 27 27 30 17 14 26 MIN. QFF PRESSURE IN HPA 1007.4 1008.5 1007.8 1006.3 1002.9 999.4 995.5 1000.1 1001.8 1012.3 1007.6 1017.6 995.5 DAY 8 2 3 20 31 25 10 13 8 3 10 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 787.2 786.6 786.5 787.9 788.5 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 791.5 792.5 790.2 790.4 792.0 ****** ****** ****** ****** DAY ** ** ** ** 18 22 27 28 15 ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 782.3 781.2 781.4 784.4 785.8 ****** ****** ****** ****** DAY ** ** ** ** 12 3 11 12 28 ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1020.6 1019.9 1019.8 1021.5 1022.3 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1026.0 1027.2 1024.4 1024.6 1026.6 ****** ****** ****** ****** DAY ** ** ** ** 18 22 27 28 15 ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1014.6 1013.3 1013.5 1017.2 1018.9 ****** ****** ****** ****** DAY ** ** ** ** 12 3 11 12 28 ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1011.9 1005.7 1002.2 1004.4 1007.5 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1020.4 1016.8 1007.3 1008.0 1013.5 ****** ****** ****** ****** DAY ** ** ** ** 8 22 27 28 22 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1006.3 999.7 997.0 1000.5 1002.9 ****** ****** ****** ****** DAY ** ** ** ** 12 26 10 13 1 ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 787.2 786.7 786.8 788.1 788.6 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 791.5 792.6 790.2 790.7 792.3 ****** ****** ****** ****** DAY ** ** ** ** 18 22 27 28 15 ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 781.6 782.0 781.7 784.6 785.8 ****** ****** ****** ****** DAY ** ** ** ** 12 3 11 12 28 ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1020.6 1020.1 1020.2 1021.8 1022.4 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1026.0 1027.3 1024.4 1025.0 1027.0 ****** ****** ****** ****** DAY ** ** ** ** 18 22 27 28 15 ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1013.8 1014.2 1013.9 1017.5 1018.9 ****** ****** ****** ****** DAY ** ** ** ** 12 3 11 12 28 ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1011.4 1005.6 1002.4 1004.2 1006.7 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1020.9 1016.9 1007.2 1009.0 1012.8 ****** ****** ****** ****** DAY ** ** ** ** 8 22 20 28 15 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.5 999.7 997.2 999.7 1001.8 ****** ****** ****** ****** DAY ** ** ** ** 12 30 24 13 1 ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.8 -3.1 1.7 10.0 13.4 18.7 23.3 23.2 16.6 10.0 3.2 -5.6 9.1 MINIMUN AIR TEMPERATURE (C) -7.4 -7.9 -2.6 3.4 5.4 9.0 13.0 12.6 8.0 3.6 -0.3 -9.5 2.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 24 27 10 0 0 0 0 0 0 0 3 25 89 DAYS WITH FREEZING MIN.<= 0 27 28 25 3 1 0 0 0 0 0 17 31 132 TEMPERATURE RECORDS LOWEST(C) -14.0 -18.0 -9.0 -3.2 -0.4 4.0 5.8 7.6 4.2 0.6 -5.6 -17.8 -18.0 DAY 19 4 17 5 7 5 1 25 16 12 9 7 MAXIMUM AIR TEMPERATURE (C) 0.8 0.3 4.9 14.4 17.7 23.7 29.3 29.2 21.8 15.1 7.8 -1.3 13.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 12 11 0 0 0 0 23 DAYS WITH MAXIMUM TEMP. <= 0 14 13 5 0 0 0 0 0 0 0 0 20 52 TEMPERATURE RECORDS HIGHEST(C) 5.8 6.0 15.0 21.0 24.8 28.0 33.4 32.0 26.0 19.6 14.2 4.8 33.4 DAY 3 27 31 21 31 11 30 1 12 13 3 27 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 8.2 7.5 11.0 12.3 14.7 16.3 16.6 13.8 11.5 8.1 8.2 11.3 MEAN DAILY TEMP. (MDT) (C) -3.3 -3.8 1.2 8.9 11.5 16.4 21.1 20.9 14.9 9.4 3.7 -5.4 8.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.0 33.5 15.8 0.0 0.0 0.0 0.0 49.3 HEATING DEG. DAYS(BASE 18 0C) 660.2 609.7 522.1 272.9 201.2 56.5 6.3 1.3 94.3 267.4 428.1 725.7 3845.7 DEWPOINT (MEAN C) -5.8 -7.2 -2.8 0.5 1.3 2.2 6.1 3.5 -0.0 2.0 -0.8 -9.5 -0.9 MIXING RATIO (G/KG) 3.30 2.99 4.07 5.19 5.48 5.83 7.71 6.58 5.01 5.78 4.75 2.59 4.94 VAPOUR PRESSURE (HPA) 4.15 3.74 5.10 6.51 6.88 7.28 9.59 8.21 6.31 7.29 5.96 3.25 6.19 SATURATION DEF. (HPA) 0.98 1.24 2.08 6.34 9.32 15.28 20.39 21.56 13.39 5.39 1.92 0.99 8.24 RELATIVE HUMIDITY (MEAN %) 81 75 73 55 46 36 35 30 35 62 77 77 57 RELATIVE HUMIDITY (MAX. %) 88 84 83 73 67 54 54 45 51 81 90 88 72 RELATIVE HUMIDITY (MIN. %) 72 67 64 43 34 26 24 20 25 43 61 63 45 RELATIVE HUMIDITY (MEAN% 03UTC) 83 76 78 72 68 53 54 44 51 78 83 77 68 RELATIVE HUMIDITY (MEAN% 09UTC) 80 72 71 51 41 30 31 27 30 52 68 73 52 RELATIVE HUMIDITY (MEAN% 15UTC) 82 78 73 49 38 30 26 22 27 54 76 77 53 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 63.2 45.5 38.2 88.8 22.2 5.0 0.0 0.0 11.6 38.1 154.9 39.9 507.4 DAYS WITH PRECIPITATION >=10 3 1 1 3 0 0 0 0 0 0 7 1 16 DAYS WITH PRECIPITATION >= 5 5 1 2 4 2 0 0 0 1 3 9 2 29 DAYS WITH PRECIPITATION >= 1 12 11 7 8 4 3 0 0 3 8 12 9 77 DAYS WITH PRECIPITATION 13 14 11 11 7 4 0 0 5 12 16 13 106 GREATEST DAILY PRECIPITATION 10.2 22.0 13.0 45.0 9.8 3.0 0.0 0.0 7.0 9.6 29.2 13.0 45.0 DAY 23 28 12 26 4 4 ** ** 7 31 7 29 DAY WITH THUNDER STORM 1 0 0 0 2 1 0 0 0 0 0 0 4 DAYS WITH SNOW OR SLEET 8 10 6 1 0 0 0 0 0 0 9 12 46 DAYS WITH DUST 0 0 0 0 0 2 0 2 0 0 0 0 4 WIND DIRECTION (PREVAILING) 270 270 225 270 225 315 315 270 90 270 225 270 270 PREVAILING WIND SPEED(KNOTS) 10.4 14.5 12.2 12.7 16.0 14.9 11.4 11.9 9.2 12.2 10.5 11.8 12.2 PREVAILING WIND PERCENT 22.1 25.0 13.5 18.7 15.5 16.0 12.9 10.3 20.0 12.2 17.1 13.7 12.9 CALMS PERCENT OF WIND 68.2 48.6 54.2 45.3 57.4 54.0 62.6 63.2 59.3 68.0 59.6 62.5 59.0 NO. OF WIND OBSERVATION 154 140 155 150 155 150 155 155 150 181 240 248 2033 VECTOR WIND DIRECTION (MEAN) 266 270 258 257 251 284 267 261 105 273 223 241 258 VECTOR WIND MAGNITUDE(KNOTS) 2.6 5.8 4.0 4.2 4.4 4.3 1.3 1.6 2.0 2.1 3.3 3.5 2.8 WIND STEADINESES (MEAN %) 83.9 82.9 69.0 59.2 75.9 66.2 32.5 41.0 54.1 63.6 80.5 77.8 57.1 WIND SPEED (MEAN KNOTS) 3.1 7.0 5.8 7.1 5.8 6.5 4.0 3.9 3.7 3.3 4.1 4.5 4.9 FASTEST WIND DIRECTION 270 310 180 160 240 310 230 240 120 270 240 270 310 FASTEST WIND SPEED (KNOTS) 29 49 31 29 35 37 31 19 25 29 21 29 49 DAY 20 19 6 1 13 3 31 1 6 19 8 12 DAYS WITH SKY CLEAR (0-2)/8 12 7 7 14 15 25 31 31 18 11 12 11 194 DAYS WITH P.CLOUDY (3-6)/8 8 15 16 8 13 5 0 0 12 14 8 13 112 DAYS WITH CLOUDY (7-8)/8 11 6 8 8 3 0 0 0 0 6 10 7 59 DAYS WITH VISIBILITY =< 2 KM 8 6 5 2 1 1 0 0 0 1 6 4 34 DURATION OF SUNSHINE HOURS 133.4 172.5 206.3 234.3 314.0 372.7 392.1 379.2 286.9 226.3 174.0 151.1 3042.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 785.7 782.8 784.4 787.3 787.1 784.3 783.5 784.9 790.8 791.5 786.3 785.9 786.2 MAX. QFE PRESSURE IN HPA 793.8 790.0 790.5 792.8 792.0 788.7 786.4 790.7 796.3 796.6 795.1 791.6 796.6 DAY-HOUR 9- 9 18- 9 18- 9 5- 9 18- 9 8- 9 2- 6 15- 6 23- 6 11- 6 2- 6 21-18 MIN. QFE PRESSURE IN HPA 775.2 774.8 773.4 777.1 780.3 779.0 780.5 780.5 784.5 787.2 778.0 772.0 772.0 DAY-HOUR 16- 3 1- 3 12- 3 1-15 6- 3 28-12 30-15 1-12 2-15 16-12 25-21 3-12 MEAN QNH PRESSURE IN HPA 1018.8 1015.3 1017.2 1020.7 1020.6 1017.1 1016.1 1017.8 1025.1 1026.0 1019.5 1019.1 1019.4 MAX. QNH PRESSURE IN HPA 1028.8 1024.1 1024.7 1027.6 1026.6 1022.5 1019.7 1025.0 1031.9 1032.3 1030.4 1026.1 1032.3 DAY-HOUR 9- 9 18- 9 18- 9 5- 9 18- 9 8- 9 2- 6 15- 6 23- 6 11- 6 2- 6 21-18 MIN. QNH PRESSURE IN HPA 1005.9 1005.4 1003.6 1008.2 1012.1 1010.5 1012.4 1012.4 1017.3 1020.7 1009.3 1001.9 1001.9 DAY-HOUR 16- 3 1- 3 12- 3 1-15 6- 3 28-12 30-15 1-12 2-15 16-12 25-21 3-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1017.1 1025.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.7 1041.7 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 9-15 7- 3 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1006.3 1001.5 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 17- 3 3-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 786.3 785.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 793.8 790.6 ****** DAY ** ** ** ** ** ** ** ** ** ** 2 22 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 779.0 772.5 ****** DAY ** ** ** ** ** ** ** ** ** ** 26 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.5 1018.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1028.8 1024.9 ****** DAY ** ** ** ** ** ** ** ** ** ** 2 22 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1010.5 1002.5 ****** DAY ** ** ** ** ** ** ** ** ** ** 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.5 1024.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.6 1039.2 ****** DAY ** ** ** ** ** ** ** ** ** ** 10 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1007.1 1004.8 ****** DAY ** ** ** ** ** ** ** ** ** ** 17 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 785.4 782.2 784.0 787.1 787.1 784.4 783.9 785.2 790.8 791.4 786.2 785.5 786.1 MAX. QFE PRESSURE IN HPA 792.7 789.0 789.2 791.8 791.3 788.0 786.2 790.0 795.3 795.7 793.8 789.8 795.7 DAY 10 19 18 5 18 8 3 15 23 11 2 22 MIN. QFE PRESSURE IN HPA 775.2 774.8 773.4 779.0 780.3 780.8 781.6 781.4 785.0 787.8 778.8 772.5 772.5 DAY 16 1 12 2 6 28 8 2 1 17 17 4 MEAN QNH PRESSURE IN HPA 1018.4 1014.5 1016.7 1020.6 1020.6 1017.2 1016.6 1018.2 1025.1 1025.9 1019.4 1018.5 1019.3 MAX. QNH PRESSURE IN HPA 1027.5 1022.9 1023.1 1026.3 1025.7 1021.7 1019.4 1024.1 1030.7 1031.2 1028.8 1023.9 1031.2 DAY 10 19 18 5 18 8 3 15 23 11 2 22 MIN. QNH PRESSURE IN HPA 1005.9 1005.4 1003.6 1010.5 1012.1 1012.8 1013.8 1013.5 1017.9 1021.4 1010.3 1002.5 1002.5 DAY 16 1 12 2 6 28 8 2 1 17 17 4 MEAN QFF PRESSURE IN HPA 1023.3 1019.3 1017.1 1013.9 1011.3 1003.3 998.8 1000.9 1013.4 1019.1 1017.8 1025.8 1013.7 MAX. QFF PRESSURE IN HPA 1037.8 1033.3 1024.1 1024.8 1019.3 1009.2 1006.9 1006.7 1020.9 1025.4 1025.9 1041.7 1041.7 DAY 10 4 18 5 18 5 1 15 22 11 2 7 MIN. QFF PRESSURE IN HPA 1006.5 1006.5 1002.1 1003.9 1004.9 998.1 993.4 994.4 1003.2 1011.5 1006.3 1007.8 993.4 DAY 16 1 7 30 13 3 18 1 1 14 17 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 786.2 783.2 785.0 787.8 787.6 784.8 784.2 785.6 791.4 792.2 787.0 786.2 786.8 MAX. QFE PRESSURE IN HPA 793.0 790.0 790.4 792.7 791.8 788.6 786.4 790.7 796.3 796.6 795.1 790.5 796.6 DAY 10 19 18 5 18 8 2 15 23 11 2 22 MIN. QFE PRESSURE IN HPA 775.9 775.9 774.3 779.5 781.3 780.8 781.9 781.4 785.3 788.5 779.7 772.9 772.9 DAY 16 1 7 2 1 28 30 2 1 17 17 4 MEAN QNH PRESSURE IN HPA 1019.5 1015.7 1018.0 1021.5 1021.1 1017.7 1016.9 1018.7 1025.9 1026.8 1020.4 1019.5 1020.1 MAX. QNH PRESSURE IN HPA 1027.8 1024.1 1024.6 1027.5 1026.3 1022.4 1019.7 1025.0 1031.9 1032.3 1030.4 1024.7 1032.3 DAY 10 19 18 5 18 8 2 15 23 11 2 22 MIN. QNH PRESSURE IN HPA 1006.7 1006.7 1004.7 1011.2 1013.4 1012.8 1014.1 1013.5 1018.3 1022.3 1011.4 1003.0 1003.0 DAY 16 1 7 2 1 28 30 2 1 17 17 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1018.3 1026.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.1 1041.4 ****** DAY ** ** ** ** ** ** ** ** ** ** 9 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.2 1008.6 ****** DAY ** ** ** ** ** ** ** ** ** ** 17 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 786.0 783.2 784.9 787.8 787.5 784.6 783.8 785.2 791.2 791.9 786.6 786.2 786.6 MAX. QFE PRESSURE IN HPA 793.8 790.0 790.5 792.8 792.0 788.7 786.0 789.7 796.2 796.0 795.1 790.8 796.2 DAY 9 18 18 5 18 8 10 15 23 11 2 22 MIN. QFE PRESSURE IN HPA 776.1 776.8 774.5 779.9 781.5 780.0 781.2 781.0 785.3 788.3 779.3 772.9 772.9 DAY 16 12 7 2 4 28 30 1 1 16 17 4 MEAN QNH PRESSURE IN HPA 1019.2 1015.8 1017.8 1021.3 1021.0 1017.5 1016.5 1018.2 1025.7 1026.5 1019.9 1019.4 1019.9 MAX. QNH PRESSURE IN HPA 1028.8 1024.1 1024.7 1027.6 1026.6 1022.5 1019.2 1023.8 1031.8 1031.5 1030.4 1025.1 1031.8 DAY 9 18 18 5 18 8 10 15 23 11 2 22 MIN. QNH PRESSURE IN HPA 1007.0 1007.8 1005.0 1011.7 1013.6 1011.8 1013.3 1013.0 1018.3 1022.0 1010.9 1003.0 1003.0 DAY 16 12 7 2 4 28 30 1 1 16 17 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.8 1025.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.1 1037.9 ****** DAY ** ** ** ** ** ** ** ** ** ** 9 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1007.0 1005.4 ****** DAY ** ** ** ** ** ** ** ** ** ** 17 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 785.2 782.6 784.0 786.9 786.8 783.9 782.9 784.3 790.3 791.0 785.8 785.5 785.8 MAX. QFE PRESSURE IN HPA 793.4 789.8 789.8 791.9 791.0 787.8 785.3 788.3 795.3 795.1 794.0 790.4 795.3 DAY 9 18 18 5 18 8 13 15 23 10 2 21 MIN. QFE PRESSURE IN HPA 776.1 776.9 774.3 778.6 780.7 779.0 780.7 780.5 784.8 787.2 779.7 772.0 772.0 DAY 16 12 7 1 4 28 30 1 1 16 17 3 MEAN QNH PRESSURE IN HPA 1018.2 1015.0 1016.7 1020.3 1020.2 1016.6 1015.4 1017.0 1024.4 1025.4 1018.9 1018.5 1018.9 MAX. QNH PRESSURE IN HPA 1028.3 1023.9 1023.9 1026.5 1025.4 1021.4 1018.3 1022.0 1030.7 1030.4 1029.1 1024.6 1030.7 DAY 9 18 18 5 18 8 13 15 23 10 2 21 MIN. QNH PRESSURE IN HPA 1007.0 1007.9 1004.7 1010.0 1012.6 1010.5 1012.6 1012.4 1017.7 1020.7 1011.4 1001.9 1001.9 DAY 16 12 7 1 4 28 30 1 1 16 17 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.9 1024.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.6 1037.3 ****** DAY ** ** ** ** ** ** ** ** ** ** 9 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1008.5 1001.5 ****** DAY ** ** ** ** ** ** ** ** ** ** 17 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 785.6 782.9 784.0 786.7 786.8 783.8 782.7 784.2 790.1 791.1 786.0 785.9 785.8 MAX. QFE PRESSURE IN HPA 793.4 790.0 789.7 791.7 791.3 787.3 785.0 787.7 795.1 795.0 793.8 790.8 795.1 DAY 9 18 18 5 21 7 10 14 23 10 2 7 MIN. QFE PRESSURE IN HPA 778.1 777.1 775.4 777.1 781.0 779.8 780.5 781.0 784.5 787.4 778.5 772.2 772.2 DAY 16 11 11 1 2 27 30 1 2 16 25 3 MEAN QNH PRESSURE IN HPA 1018.6 1015.3 1016.7 1020.1 1020.2 1016.5 1015.1 1017.0 1024.3 1025.5 1019.2 1019.0 1019.0 MAX. QNH PRESSURE IN HPA 1028.3 1024.1 1023.8 1026.2 1025.7 1020.8 1017.9 1021.3 1030.4 1030.3 1028.8 1025.1 1030.4 DAY 9 18 18 5 21 7 10 14 23 10 2 7 MIN. QNH PRESSURE IN HPA 1009.4 1008.2 1006.1 1008.2 1013.0 1011.5 1012.4 1013.0 1017.3 1020.9 1009.9 1002.1 1002.1 DAY 16 11 11 1 2 27 30 1 2 16 25 3 MEAN QFF PRESSURE IN HPA 1023.5 1020.1 1016.8 1013.4 1010.9 1002.6 997.1 999.7 1012.6 1018.8 1017.6 1026.3 1013.3 MAX. QFF PRESSURE IN HPA 1038.5 1032.8 1024.7 1023.9 1018.5 1007.7 1004.2 1004.0 1020.6 1025.1 1026.7 1041.6 1041.6 DAY 8 19 1 5 17 5 1 25 22 11 9 7 MIN. QFF PRESSURE IN HPA 1011.1 1010.9 1006.0 1001.8 1005.0 997.4 992.5 994.6 1002.4 1012.4 1009.9 1004.1 992.5 DAY 16 11 11 1 5 22 30 1 2 14 5 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 786.4 786.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 794.0 791.6 ****** DAY ** ** ** ** ** ** ** ** ** ** 2 21 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 778.2 772.7 ****** DAY ** ** ** ** ** ** ** ** ** ** 25 3 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.7 1019.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1029.1 1026.1 ****** DAY ** ** ** ** ** ** ** ** ** ** 2 21 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.6 1002.8 ****** DAY ** ** ** ** ** ** ** ** ** ** 25 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1017.7 1026.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.3 1039.8 ****** DAY ** ** ** ** ** ** ** ** ** ** 9 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.7 1005.0 ****** DAY ** ** ** ** ** ** ** ** ** ** 25 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 786.2 786.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 794.0 791.3 ****** DAY ** ** ** ** ** ** ** ** ** ** 2 21 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 778.0 772.5 ****** DAY ** ** ** ** ** ** ** ** ** ** 25 3 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.4 1019.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1029.1 1025.7 ****** DAY ** ** ** ** ** ** ** ** ** ** 2 21 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.3 1002.5 ****** DAY ** ** ** ** ** ** ** ** ** ** 25 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.4 1025.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.6 1038.4 ****** DAY ** ** ** ** ** ** ** ** ** ** 9 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1008.1 1005.1 ****** DAY ** ** ** ** ** ** ** ** ** ** 22 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.7 -3.5 1.1 5.9 12.6 17.2 22.7 22.5 16.2 8.7 2.8 -4.1 8.2 MINIMUN AIR TEMPERATURE (C) -8.8 -8.0 -3.5 1.2 5.9 8.5 13.2 13.0 8.5 2.2 -2.2 -8.4 1.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 28 23 12 0 0 0 0 0 0 0 8 31 102 DAYS WITH FREEZING MIN.<= 0 31 28 30 10 2 0 0 0 0 8 21 31 161 TEMPERATURE RECORDS LOWEST(C) -17.2 -14.0 -10.0 -2.6 0.0 5.4 7.6 8.0 1.0 -2.0 -11.8 -17.4 -17.4 DAY 23 25 1 6 8 1 11 26 22 14 26 20 MAXIMUM AIR TEMPERATURE (C) 1.8 1.4 6.5 11.4 16.7 21.5 29.2 31.0 23.8 16.1 8.8 1.0 14.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 16 24 0 0 0 0 40 DAYS WITH MAXIMUM TEMP. <= 0 8 10 0 0 0 0 0 0 0 0 2 13 33 TEMPERATURE RECORDS HIGHEST(C) 7.0 5.4 13.4 16.6 22.0 26.6 33.6 33.2 29.4 23.8 14.6 5.6 33.6 DAY 5 21 24 2 22 21 15 2 3 2 1 31 DIF. BETWEEN (MAX.-MIN.) (C) 10.6 9.4 10.0 10.2 10.8 13.0 16.0 18.0 15.3 13.9 11.0 9.4 12.3 MEAN DAILY TEMP. (MDT) (C) -3.5 -3.3 1.5 6.3 11.3 15.0 21.2 22.0 16.1 9.2 3.3 -3.7 7.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.0 36.7 42.6 0.0 0.0 0.0 0.0 79.3 HEATING DEG. DAYS(BASE 18 0C) 666.4 596.3 512.2 351.9 207.4 92.2 3.9 0.0 76.8 274.2 440.8 672.2 3894.3 DEWPOINT (MEAN C) -7.3 -6.7 -4.0 0.6 4.2 5.5 5.8 2.3 1.7 -2.5 -6.9 -10.2 -1.4 MIXING RATIO (G/KG) 2.98 3.08 3.73 5.25 6.70 7.32 7.68 5.98 5.58 4.13 3.22 2.35 4.83 VAPOUR PRESSURE (HPA) 3.74 3.86 4.68 6.57 8.40 9.14 9.54 7.48 7.01 5.21 4.05 2.96 6.05 SATURATION DEF. (HPA) 1.08 0.99 2.15 3.07 6.80 11.16 19.33 21.22 12.73 6.70 3.94 1.76 7.58 RELATIVE HUMIDITY (MEAN %) 78 80 71 73 60 50 36 29 41 49 52 65 57 RELATIVE HUMIDITY (MAX. %) 87 89 86 92 80 74 55 46 58 69 68 77 73 RELATIVE HUMIDITY (MIN. %) 65 68 55 53 47 36 24 16 25 31 36 52 42 RELATIVE HUMIDITY (MEAN% 03UTC) 82 84 80 87 80 74 55 45 55 64 60 70 70 RELATIVE HUMIDITY (MEAN% 09UTC) 72 74 63 61 53 41 31 22 32 35 42 58 49 RELATIVE HUMIDITY (MEAN% 15UTC) 78 78 67 66 55 43 27 18 32 42 48 65 52 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 38.0 40.3 28.9 133.7 94.2 64.6 0.7 0.0 1.0 1.5 26.7 6.3 435.9 DAYS WITH PRECIPITATION >=10 1 2 1 5 4 3 0 0 0 0 1 0 17 DAYS WITH PRECIPITATION >= 5 2 3 3 9 7 4 0 0 0 0 3 0 31 DAYS WITH PRECIPITATION >= 1 5 5 6 11 12 7 0 0 1 1 4 4 56 DAYS WITH PRECIPITATION 8 9 9 12 16 9 2 0 1 2 6 6 80 GREATEST DAILY PRECIPITATION 19.0 16.0 10.0 34.0 30.0 20.0 0.7 0.0 1.0 1.2 14.8 2.2 34.0 DAY 12 5 25 12 5 4 24 ** 20 24 3 11 DAY WITH THUNDER STORM 0 0 0 2 3 3 0 0 0 1 0 0 9 DAYS WITH SNOW OR SLEET 8 8 7 5 0 0 0 0 0 0 2 5 35 DAYS WITH DUST 0 0 0 0 0 1 0 0 0 0 0 1 2 WIND DIRECTION (PREVAILING) 270 315 270 270 225 270 270 270 270 270 225 270 270 PREVAILING WIND SPEED(KNOTS) 12.0 12.4 10.1 10.0 14.4 11.8 10.1 10.5 11.7 11.4 12.5 7.8 10.6 PREVAILING WIND PERCENT 13.3 9.8 15.7 13.7 11.0 10.7 12.2 14.5 16.3 8.1 18.8 10.5 12.0 CALMS PERCENT OF WIND 71.0 75.4 63.3 52.6 59.7 69.3 66.3 62.5 60.4 69.0 58.3 75.0 65.4 NO. OF WIND OBSERVATION 248 224 248 211 154 150 181 248 240 248 240 248 2640 VECTOR WIND DIRECTION (MEAN) 245 279 254 232 217 255 263 251 273 256 239 249 250 VECTOR WIND MAGNITUDE(KNOTS) 2.8 1.7 3.2 3.3 1.8 2.3 1.5 2.1 2.9 1.8 3.7 0.9 2.3 WIND STEADINESES (MEAN %) 80.0 63.0 78.0 61.1 43.9 63.9 45.5 55.3 67.4 51.4 80.4 40.9 60.5 WIND SPEED (MEAN KNOTS) 3.5 2.7 4.1 5.4 4.1 3.6 3.3 3.8 4.3 3.5 4.6 2.2 3.8 FASTEST WIND DIRECTION 230 270 240 210 210 220 240 120 230 190 210 310 210 FASTEST WIND SPEED (KNOTS) 27 29 31 33 29 27 17 19 29 31 37 17 37 DAY 11 8 25 3 2 29 28 7 19 3 11 29 DAYS WITH SKY CLEAR (0-2)/8 14 11 14 6 12 19 28 31 26 27 20 20 228 DAYS WITH P.CLOUDY (3-6)/8 13 9 9 15 13 9 3 0 4 4 8 4 91 DAYS WITH CLOUDY (7-8)/8 4 8 8 9 6 2 0 0 0 0 2 7 46 DAYS WITH VISIBILITY =< 2 KM 3 9 4 2 0 0 0 0 0 0 0 3 21 DURATION OF SUNSHINE HOURS 197.9 ****** 236.7 ****** ****** 192.6 366.8 300.9 320.0 297.7 242.2 192.9 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 787.1 784.8 785.1 785.2 788.5 786.1 783.5 786.2 788.0 789.8 788.0 787.2 786.6 MAX. QFE PRESSURE IN HPA 794.1 790.9 793.1 790.0 793.0 789.5 787.7 789.9 794.1 796.9 794.2 790.6 796.9 DAY-HOUR 7- 6 1-18 3- 9 12- 9 22- 6 1- 9 4- 6 25- 6 13- 6 25- 6 15-18 29-18 MIN. QFE PRESSURE IN HPA 778.9 773.0 777.0 780.2 783.1 780.4 779.9 782.4 782.6 784.2 780.4 782.7 773.0 DAY-HOUR 16-21 5- 3 17- 0 19-12 2- 3 29-12 16-15 8-12 20- 0 12- 3 25-12 4-12 MEAN QNH PRESSURE IN HPA 1020.5 1017.7 1018.1 1018.1 1022.2 1019.3 1016.0 1019.4 1021.7 1023.9 1021.6 1020.7 1019.9 MAX. QNH PRESSURE IN HPA 1029.2 1025.2 1027.9 1024.1 1027.8 1023.5 1021.3 1024.0 1029.2 1032.6 1029.3 1024.9 1032.6 DAY-HOUR 7- 6 1-18 3- 9 12- 9 22- 6 1- 9 4- 6 25- 6 13- 6 25- 6 15-18 29-18 MIN. QNH PRESSURE IN HPA 1010.4 1003.1 1008.1 1012.0 1015.6 1012.3 1011.7 1014.7 1015.0 1017.0 1012.3 1015.1 1003.1 DAY-HOUR 16-21 5- 3 17- 0 19-12 2- 3 29-12 16-15 8-12 20- 0 12- 3 25-12 4-12 MEAN QFF PRESSURE IN HPA 1025.1 1021.8 1017.8 1013.5 ****** ****** ****** 1000.3 1007.7 1016.7 1019.9 1025.6 ****** MAX. QFF PRESSURE IN HPA 1035.2 1031.5 1030.5 1023.3 ****** ****** ****** 1007.2 1020.2 1029.8 1030.8 1038.0 ****** DAY-HOUR 7- 6 25- 6 3- 6 12- 9 **-** **-** **-** 24-21 22- 3 25- 6 26-18 20- 3 MIN. QFF PRESSURE IN HPA 1010.6 1002.7 1006.2 1003.8 ****** ****** ****** 994.3 998.4 1004.8 1008.4 1014.5 ****** DAY-HOUR 16-21 5- 3 25- 0 19-12 **-** **-** **-** 8-18 4-12 3-21 24- 0 4-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 787.0 784.6 784.7 785.1 ****** ****** ****** 786.2 787.9 789.7 787.8 787.2 ****** MAX. QFE PRESSURE IN HPA 793.0 789.3 791.5 789.4 ****** ****** ****** 789.2 793.0 795.8 794.0 790.4 ****** DAY 7 2 3 13 ** ** ** 25 13 27 16 30 MIN. QFE PRESSURE IN HPA 780.6 774.0 777.0 781.5 ****** ****** ****** 783.7 782.6 784.6 781.4 783.7 ****** DAY 17 5 17 19 ** ** ** 4 20 12 24 17 MEAN QNH PRESSURE IN HPA 1020.4 1017.4 1017.6 1018.1 ****** ****** ****** 1019.4 1021.6 1023.8 1021.4 1020.6 ****** MAX. QNH PRESSURE IN HPA 1027.8 1023.3 1026.0 1023.4 ****** ****** ****** 1023.1 1027.8 1031.3 1029.1 1024.6 ****** DAY 7 2 3 13 ** ** ** 25 13 27 16 30 MIN. QNH PRESSURE IN HPA 1012.5 1004.4 1008.1 1013.6 ****** ****** ****** 1016.3 1015.0 1017.5 1013.5 1016.3 ****** DAY 17 5 17 19 ** ** ** 4 20 12 24 17 MEAN QFF PRESSURE IN HPA 1024.0 1020.8 1016.9 1013.1 ****** ****** ****** 1000.0 1007.1 1015.9 1018.6 1024.7 ****** MAX. QFF PRESSURE IN HPA 1030.7 1028.2 1029.4 1021.2 ****** ****** ****** 1005.7 1018.1 1027.9 1029.3 1035.4 ****** DAY 8 12 3 13 ** ** ** 25 22 26 27 20 MIN. QFF PRESSURE IN HPA 1012.6 1003.6 1006.2 1004.9 ****** ****** ****** 995.4 1000.7 1006.8 1008.4 1017.5 ****** DAY 11 5 25 19 ** ** ** 9 20 4 24 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 786.8 784.4 784.8 785.0 788.3 786.2 783.4 786.4 788.1 789.8 787.8 787.0 786.5 MAX. QFE PRESSURE IN HPA 793.0 789.8 792.0 788.7 792.4 789.0 787.6 789.7 793.4 795.8 793.5 789.8 795.8 DAY 7 1 3 1 22 20 4 25 13 25 16 30 MIN. QFE PRESSURE IN HPA 781.0 773.0 777.4 781.0 783.1 781.6 780.6 784.2 782.6 784.2 781.2 783.6 773.0 DAY 12 5 26 19 2 29 16 3 20 12 24 12 MEAN QNH PRESSURE IN HPA 1020.2 1017.3 1017.7 1017.9 1022.1 1019.5 1016.0 1019.7 1021.8 1023.8 1021.4 1020.4 1019.8 MAX. QNH PRESSURE IN HPA 1027.8 1023.9 1026.6 1022.5 1027.1 1022.9 1021.2 1023.8 1028.3 1031.3 1028.4 1023.9 1031.3 DAY 7 1 3 1 22 20 4 25 13 25 16 30 MIN. QNH PRESSURE IN HPA 1013.0 1003.1 1008.6 1013.0 1015.6 1013.8 1012.5 1017.0 1015.0 1017.0 1013.3 1016.2 1003.1 DAY 12 5 26 19 2 29 16 3 20 12 24 12 MEAN QFF PRESSURE IN HPA 1025.8 1022.2 1018.4 1013.7 1012.9 1006.4 998.2 1001.7 1008.9 1018.0 1021.0 1026.5 1014.5 MAX. QFF PRESSURE IN HPA 1034.1 1030.6 1030.4 1022.0 1016.9 1014.5 1007.0 1006.6 1020.2 1028.4 1030.7 1038.0 1038.0 DAY 23 13 3 12 9 1 4 25 22 26 27 20 MIN. QFF PRESSURE IN HPA 1014.1 1002.7 1006.6 1005.8 1007.2 997.7 993.5 997.2 1002.2 1008.2 1011.4 1020.6 993.5 DAY 11 5 25 19 2 29 22 4 4 11 24 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 787.7 785.1 785.6 785.6 789.0 786.5 783.9 786.9 788.6 790.5 788.5 787.7 787.1 MAX. QFE PRESSURE IN HPA 794.1 790.3 793.0 789.6 793.0 789.5 787.7 789.9 794.1 796.9 794.0 790.0 796.9 DAY 7 1 3 12 22 20 4 25 13 25 16 10 MIN. QFE PRESSURE IN HPA 782.0 773.3 778.3 781.0 783.8 781.3 780.6 784.2 783.0 785.0 781.9 783.8 773.3 DAY 11 5 17 19 2 29 16 8 20 12 24 12 MEAN QNH PRESSURE IN HPA 1021.2 1018.1 1018.7 1018.7 1022.8 1019.8 1016.5 1020.3 1022.4 1024.8 1022.3 1021.3 1020.6 MAX. QNH PRESSURE IN HPA 1029.2 1024.5 1027.8 1023.6 1027.8 1023.5 1021.3 1024.0 1029.2 1032.6 1029.1 1024.1 1032.6 DAY 7 1 3 12 22 20 4 25 13 25 16 10 MIN. QNH PRESSURE IN HPA 1014.2 1003.5 1009.7 1013.0 1016.5 1013.4 1012.5 1017.0 1015.5 1017.9 1014.1 1016.5 1003.5 DAY 11 5 17 19 2 29 16 8 20 12 24 12 MEAN QFF PRESSURE IN HPA 1026.9 1022.9 1018.9 1014.4 ****** ****** ****** 1000.9 1008.2 1017.8 1021.0 1027.0 ****** MAX. QFF PRESSURE IN HPA 1035.2 1031.5 1030.5 1022.4 ****** ****** ****** 1007.2 1018.2 1029.8 1030.7 1036.2 ****** DAY 7 25 3 12 ** ** ** 24 22 25 27 20 MIN. QFF PRESSURE IN HPA 1015.9 1003.5 1008.5 1007.4 ****** ****** ****** 995.7 1002.2 1009.2 1011.7 1021.8 ****** DAY 11 5 25 19 ** ** ** 8 4 4 11 12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 787.5 785.2 785.7 785.5 788.8 786.3 783.6 786.5 788.3 790.1 788.1 787.4 786.9 MAX. QFE PRESSURE IN HPA 793.6 790.6 793.1 790.0 792.6 789.5 787.5 789.0 793.6 796.8 794.1 790.2 796.8 DAY 7 1 3 12 22 1 4 11 13 25 15 23 MIN. QFE PRESSURE IN HPA 781.6 774.6 779.0 780.8 783.7 780.8 780.6 783.5 783.5 784.6 781.0 783.6 774.6 DAY 11 5 17 19 2 29 16 8 19 12 25 4 MEAN QNH PRESSURE IN HPA 1021.0 1018.2 1018.8 1018.5 1022.7 1019.6 1016.3 1019.8 1022.0 1024.2 1021.7 1021.0 1020.3 MAX. QNH PRESSURE IN HPA 1028.6 1024.9 1027.9 1024.1 1027.3 1023.5 1021.0 1022.9 1028.6 1032.5 1029.2 1024.4 1032.5 DAY 7 1 3 12 22 1 4 11 13 25 15 23 MIN. QNH PRESSURE IN HPA 1013.8 1005.1 1010.5 1012.8 1016.3 1012.8 1012.5 1016.1 1016.1 1017.5 1013.0 1016.2 1005.1 DAY 11 5 17 19 2 29 16 8 19 12 25 4 MEAN QFF PRESSURE IN HPA 1024.6 1021.4 1017.7 1013.5 ****** ****** ****** 1000.0 1007.5 1016.0 1019.1 1025.0 ****** MAX. QFF PRESSURE IN HPA 1033.2 1028.4 1028.2 1023.3 ****** ****** ****** 1005.2 1016.2 1029.3 1028.1 1033.6 ****** DAY 7 25 3 12 ** ** ** 24 22 25 27 20 MIN. QFF PRESSURE IN HPA 1014.2 1005.2 1006.5 1006.1 ****** ****** ****** 994.6 998.9 1006.9 1009.6 1017.3 ****** DAY 11 5 25 19 ** ** ** 8 4 12 11 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 786.7 784.4 784.8 784.8 788.3 785.8 782.8 785.5 787.4 789.2 787.4 786.7 786.1 MAX. QFE PRESSURE IN HPA 792.5 790.3 791.9 789.0 792.0 789.2 786.3 788.0 792.4 795.4 793.6 789.5 795.4 DAY 7 1 3 12 22 1 3 24 13 25 15 23 MIN. QFE PRESSURE IN HPA 780.9 775.3 778.5 780.2 783.3 780.4 780.1 782.4 782.9 784.7 780.4 782.7 775.3 DAY 11 5 16 19 6 29 16 8 19 12 25 4 MEAN QNH PRESSURE IN HPA 1020.0 1017.2 1017.8 1017.7 1022.0 1018.9 1015.3 1018.6 1020.9 1023.2 1020.9 1020.0 1019.4 MAX. QNH PRESSURE IN HPA 1027.2 1024.5 1026.5 1022.9 1026.6 1023.1 1019.6 1021.7 1027.1 1030.8 1028.6 1023.5 1030.8 DAY 7 1 3 12 22 1 3 24 13 25 15 23 MIN. QNH PRESSURE IN HPA 1012.9 1006.0 1009.9 1012.0 1015.9 1012.3 1011.9 1014.7 1015.4 1017.6 1012.3 1015.1 1006.0 DAY 11 5 16 19 6 29 16 8 19 12 25 4 MEAN QFF PRESSURE IN HPA 1023.5 1020.4 1016.8 1012.6 ****** ****** ****** 999.0 1006.5 1015.3 1018.2 1024.0 ****** MAX. QFF PRESSURE IN HPA 1031.2 1027.0 1028.9 1020.9 ****** ****** ****** 1004.6 1015.1 1025.9 1027.6 1031.8 ****** DAY 7 25 3 12 ** ** ** 24 21 26 27 20 MIN. QFF PRESSURE IN HPA 1013.1 1006.4 1006.6 1003.8 ****** ****** ****** 994.4 998.4 1006.8 1009.8 1014.5 ****** DAY 11 5 25 19 ** ** ** 8 4 3 23 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 787.0 784.6 784.8 784.8 788.1 785.7 782.6 785.3 787.4 789.5 787.8 787.0 786.2 MAX. QFE PRESSURE IN HPA 793.0 790.3 791.4 789.0 791.7 788.8 786.2 788.0 792.5 795.6 793.9 790.2 795.6 DAY 6 1 3 12 21 1 3 24 13 25 15 23 MIN. QFE PRESSURE IN HPA 780.1 777.2 778.0 780.8 784.1 780.8 779.9 782.4 782.8 784.9 781.0 783.6 777.2 DAY 16 5 16 19 6 29 16 8 19 15 25 15 MEAN QNH PRESSURE IN HPA 1020.4 1017.5 1017.7 1017.7 1021.8 1018.8 1015.0 1018.4 1021.0 1023.5 1021.4 1020.5 1019.5 MAX. QNH PRESSURE IN HPA 1027.8 1024.5 1025.9 1022.9 1026.2 1022.6 1019.4 1021.7 1027.2 1031.0 1028.9 1024.4 1031.0 DAY 6 1 3 12 21 1 3 24 13 25 15 23 MIN. QNH PRESSURE IN HPA 1011.9 1008.3 1009.3 1012.8 1016.8 1012.8 1011.7 1014.7 1015.2 1017.8 1013.0 1016.2 1008.3 DAY 16 5 16 19 6 29 16 8 19 15 25 15 MEAN QFF PRESSURE IN HPA 1025.8 1022.5 1018.1 1013.3 1012.6 1005.7 997.1 1000.4 1008.1 1017.7 1021.1 1026.5 1014.1 MAX. QFF PRESSURE IN HPA 1033.4 1029.6 1029.0 1021.9 1018.9 1013.3 1004.1 1005.0 1017.1 1027.4 1029.9 1035.0 1035.0 DAY 7 25 3 12 13 1 3 24 21 26 27 20 MIN. QFF PRESSURE IN HPA 1012.6 1009.7 1007.1 1006.1 1007.7 997.7 991.3 995.7 1000.0 1008.6 1011.4 1019.6 991.3 DAY 16 5 25 19 2 29 21 3 4 3 23 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 787.3 785.1 785.3 785.4 ****** ****** ****** 786.3 788.2 790.0 788.2 787.4 ****** MAX. QFE PRESSURE IN HPA 793.0 790.9 791.6 790.0 ****** ****** ****** 789.0 793.2 795.8 794.2 790.6 ****** DAY 6 1 3 12 ** ** ** 24 12 25 15 29 MIN. QFE PRESSURE IN HPA 779.0 778.6 778.4 781.9 ****** ****** ****** 783.3 783.2 785.9 782.0 783.9 ****** DAY 16 4 25 19 ** ** ** 8 19 15 25 15 MEAN QNH PRESSURE IN HPA 1020.7 1018.1 1018.3 1018.4 ****** ****** ****** 1019.6 1022.0 1024.1 1021.9 1020.9 ****** MAX. QNH PRESSURE IN HPA 1027.8 1025.2 1026.1 1024.1 ****** ****** ****** 1022.9 1028.1 1031.3 1029.3 1024.9 ****** DAY 6 1 3 12 ** ** ** 24 12 25 15 29 MIN. QNH PRESSURE IN HPA 1010.5 1010.0 1009.8 1014.1 ****** ****** ****** 1015.9 1015.7 1019.1 1014.2 1016.6 ****** DAY 16 4 25 19 ** ** ** 8 19 15 25 15 MEAN QFF PRESSURE IN HPA 1026.3 1023.0 1018.4 1014.0 ****** ****** ****** 1000.3 1008.0 1017.2 1020.8 1026.6 ****** MAX. QFF PRESSURE IN HPA 1033.5 1031.1 1028.9 1022.5 ****** ****** ****** 1006.1 1018.7 1029.2 1030.8 1035.3 ****** DAY 7 13 3 12 ** ** ** 25 21 25 26 19 MIN. QFF PRESSURE IN HPA 1010.9 1009.8 1008.5 1006.8 ****** ****** ****** 994.3 1001.2 1006.7 1010.4 1020.8 ****** DAY 16 4 25 18 ** ** ** 8 4 3 23 26 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 787.2 784.9 785.3 785.4 ****** ****** ****** 786.5 788.3 790.0 788.2 787.4 ****** MAX. QFE PRESSURE IN HPA 793.0 790.1 791.6 790.0 ****** ****** ****** 789.8 793.4 795.8 794.0 790.4 ****** DAY 6 1 3 12 ** ** ** 24 12 25 15 29 MIN. QFE PRESSURE IN HPA 778.9 776.2 778.4 782.0 ****** ****** ****** 783.5 783.0 784.8 782.0 783.9 ****** DAY 16 4 25 18 ** ** ** 8 19 11 25 15 MEAN QNH PRESSURE IN HPA 1020.7 1017.9 1018.3 1018.4 ****** ****** ****** 1019.8 1022.0 1024.1 1021.8 1020.9 ****** MAX. QNH PRESSURE IN HPA 1027.8 1024.2 1026.1 1024.1 ****** ****** ****** 1023.9 1028.3 1031.3 1029.1 1024.6 ****** DAY 6 1 3 12 ** ** ** 24 12 25 15 29 MIN. QNH PRESSURE IN HPA 1010.4 1007.1 1009.8 1014.2 ****** ****** ****** 1016.1 1015.5 1017.7 1014.2 1016.6 ****** DAY 16 4 25 18 ** ** ** 8 19 11 25 15 MEAN QFF PRESSURE IN HPA 1024.3 1021.2 1017.1 1013.4 ****** ****** ****** 1000.1 1007.6 1016.0 1019.5 1025.0 ****** MAX. QFF PRESSURE IN HPA 1030.8 1027.6 1027.3 1022.9 ****** ****** ****** 1007.2 1018.2 1028.9 1028.5 1033.9 ****** DAY 22 24 2 12 ** ** ** 24 21 25 26 19 MIN. QFF PRESSURE IN HPA 1010.6 1006.9 1007.4 1005.3 ****** ****** ****** 994.3 999.9 1004.8 1010.3 1020.0 ****** DAY 16 4 24 18 ** ** ** 3 4 3 23 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -6.9 -2.7 -1.6 4.8 14.7 18.6 21.2 21.3 17.0 9.4 2.9 -0.3 8.2 MINIMUN AIR TEMPERATURE (C) -10.8 -6.4 -5.8 0.2 5.8 8.2 12.6 11.9 8.5 2.7 -2.4 -4.2 1.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 25 21 20 2 0 0 0 0 0 1 10 14 93 DAYS WITH FREEZING MIN.<= 0 31 29 31 15 0 0 0 0 0 7 24 28 165 TEMPERATURE RECORDS LOWEST(C) -23.0 -14.0 -14.0 -7.2 3.0 1.2 6.6 6.8 3.0 -5.0 -10.0 -10.4 -23.0 DAY 22 4 5 4 2 7 15 10 30 28 12 19 MAXIMUM AIR TEMPERATURE (C) -3.0 1.3 2.6 9.9 19.0 24.0 28.4 29.0 24.5 16.0 8.8 4.3 13.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 6 11 0 0 0 0 17 DAYS WITH MAXIMUM TEMP. <= 0 23 11 5 2 0 0 0 0 0 0 0 1 42 TEMPERATURE RECORDS HIGHEST(C) 5.6 9.0 8.6 17.4 24.2 29.0 30.6 32.6 29.0 22.0 15.0 11.6 32.6 DAY 1 25 29 30 27 30 20 12 15 1 2 5 DIF. BETWEEN (MAX.-MIN.) (C) 7.8 7.7 8.4 9.7 13.2 15.8 15.8 17.1 16.0 13.3 11.2 8.5 12.0 MEAN DAILY TEMP. (MDT) (C) -6.9 -2.5 -1.6 5.0 12.4 16.1 20.5 20.4 16.5 9.3 3.2 0.1 7.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.0 16.7 16.9 0.0 0.0 0.0 0.0 33.6 HEATING DEG. DAYS(BASE 18 0C) 772.2 595.7 607.9 389.6 172.8 63.5 3.5 2.1 51.0 268.7 443.4 556.0 3926.2 DEWPOINT (MEAN C) -10.7 -6.5 -5.6 -1.8 3.5 4.1 6.0 3.6 2.1 -0.4 -6.0 -5.8 -1.5 MIXING RATIO (G/KG) 2.32 3.10 3.32 4.37 6.35 6.71 7.63 6.51 5.76 4.86 3.27 3.28 4.79 VAPOUR PRESSURE (HPA) 2.91 3.89 4.15 5.48 7.96 8.39 9.54 8.16 7.23 6.11 4.13 4.13 6.01 SATURATION DEF. (HPA) 1.00 1.29 1.40 3.51 9.43 13.89 16.55 18.37 13.13 6.28 3.76 2.05 7.56 RELATIVE HUMIDITY (MEAN %) 75 76 76 66 50 42 39 33 39 53 55 68 56 RELATIVE HUMIDITY (MAX. %) 83 85 86 83 72 61 57 47 55 73 73 82 71 RELATIVE HUMIDITY (MIN. %) 65 65 60 46 37 28 25 22 26 36 38 56 42 RELATIVE HUMIDITY (MEAN% 03UTC) 78 77 79 78 71 60 54 46 52 69 69 72 67 RELATIVE HUMIDITY (MEAN% 09UTC) 73 75 71 54 44 34 32 28 30 43 45 62 49 RELATIVE HUMIDITY (MEAN% 15UTC) 73 76 73 59 46 32 29 24 31 45 47 66 50 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 52.7 60.7 68.5 110.7 20.1 0.3 1.2 0.0 0.7 22.8 3.2 29.9 370.8 DAYS WITH PRECIPITATION >=10 1 2 2 3 0 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 5 3 4 5 6 1 0 0 0 0 2 0 2 23 DAYS WITH PRECIPITATION >= 1 11 7 13 9 7 0 0 0 0 4 2 7 60 DAYS WITH PRECIPITATION 15 12 16 15 10 1 4 0 1 7 3 13 97 GREATEST DAILY PRECIPITATION 13.0 15.8 12.0 52.0 5.0 0.3 0.5 0.0 0.7 9.0 2.0 8.0 52.0 DAY 6 2 2 13 5 27 7 ** 3 13 7 14 DAY WITH THUNDER STORM 0 0 0 0 2 0 1 0 0 1 1 0 5 DAYS WITH SNOW OR SLEET 14 9 13 5 0 0 0 0 0 1 0 6 48 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 90 270 270 225 225 270 90 270 270 270 180 225 270 PREVAILING WIND SPEED(KNOTS) 11.3 14.6 9.5 14.8 13.3 11.6 9.6 12.2 12.9 12.2 10.2 13.3 12.6 PREVAILING WIND PERCENT 11.3 11.6 11.7 16.9 17.4 12.1 11.7 11.7 26.7 13.3 6.3 20.2 11.3 CALMS PERCENT OF WIND 70.2 73.3 66.5 51.2 43.9 61.8 70.2 62.5 46.3 62.5 78.8 50.0 62.1 NO. OF WIND OBSERVATION 248 232 248 207 155 173 248 248 240 248 240 248 2735 VECTOR WIND DIRECTION (MEAN) 140 258 243 225 268 258 96 258 265 244 224 227 245 VECTOR WIND MAGNITUDE(KNOTS) 1.5 2.7 1.6 3.5 5.1 1.6 1.2 1.5 5.6 3.1 1.7 4.6 2.3 WIND STEADINESES (MEAN %) 50.0 73.0 48.5 55.6 73.9 35.6 41.4 34.9 86.2 70.5 70.8 71.9 51.1 WIND SPEED (MEAN KNOTS) 3.0 3.7 3.3 6.3 6.9 4.5 2.9 4.3 6.5 4.4 2.4 6.4 4.5 FASTEST WIND DIRECTION 250 270 300 250 220 210 120 230 300 200 280 270 270 FASTEST WIND SPEED (KNOTS) 21 27 27 29 29 29 29 23 31 29 27 41 41 DAY 6 8 13 10 16 4 12 21 3 26 11 24 DAYS WITH SKY CLEAR (0-2)/8 8 6 5 8 14 27 18 29 28 17 18 8 186 DAYS WITH P.CLOUDY (3-6)/8 10 10 16 11 11 3 13 2 2 13 11 14 116 DAYS WITH CLOUDY (7-8)/8 13 13 10 11 6 0 0 0 0 1 1 9 64 DAYS WITH VISIBILITY =< 2 KM 3 12 11 3 0 0 0 0 0 0 0 2 31 DURATION OF SUNSHINE HOURS 123.4 120.6 175.1 196.4 293.1 373.7 322.1 364.9 322.6 266.6 230.4 140.9 2929.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 785.2 783.6 781.9 785.3 788.1 786.4 787.4 787.4 787.7 789.3 790.7 788.3 786.8 MAX. QFE PRESSURE IN HPA 792.0 789.8 788.1 790.2 792.4 789.2 792.8 793.3 793.8 795.9 797.0 793.3 797.0 DAY-HOUR 25-18 8- 9 29-18 30- 6 18- 3 12- 6 3-21 29- 6 26- 6 1-21 18- 6 4- 6 MIN. QFE PRESSURE IN HPA 777.1 776.0 774.3 777.8 784.0 782.0 781.0 781.8 780.8 781.8 786.0 782.3 774.3 DAY-HOUR 19- 3 5- 3 7-15 13- 0 29- 3 18-15 6-15 7-15 21-21 27- 0 28-12 29-12 MEAN QNH PRESSURE IN HPA 1018.2 1016.2 1014.2 1018.3 1021.7 1019.6 1020.9 1020.9 1021.3 1023.2 1025.0 1022.0 1020.1 MAX. QNH PRESSURE IN HPA 1026.6 1023.9 1021.8 1024.4 1027.1 1023.1 1027.6 1028.2 1028.8 1031.4 1032.8 1028.2 1032.8 DAY-HOUR 25-18 8- 9 29-18 30- 6 18- 3 12- 6 3-21 29- 6 26- 6 1-21 18- 6 4- 6 MIN. QNH PRESSURE IN HPA 1008.2 1006.8 1004.7 1009.1 1016.7 1014.2 1013.0 1014.0 1012.8 1014.0 1019.2 1014.6 1004.7 DAY-HOUR 19- 3 5- 3 7-15 13- 0 29- 3 18-15 6-15 7-15 21-21 27- 0 28-12 29-12 MEAN QFF PRESSURE IN HPA 1025.9 1019.4 1016.3 1015.0 ****** ****** 1002.6 1002.7 1006.7 1015.3 1023.3 1023.2 ****** MAX. QFF PRESSURE IN HPA 1040.5 1031.1 1026.0 1026.1 ****** ****** 1009.2 1012.9 1015.9 1025.7 1036.2 1032.8 ****** DAY-HOUR 26- 3 24- 6 28-18 4- 9 **-** **-** 3-21 29-18 25- 3 19- 6 18- 3 19- 3 MIN. QFF PRESSURE IN HPA 1010.5 1006.2 1005.4 1002.0 ****** ****** 995.0 994.6 999.9 1004.9 1012.4 1011.8 ****** DAY-HOUR 6-12 2- 0 7-15 12-21 **-** **-** 6-12 7-12 8- 9 27- 0 6- 0 29- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 785.2 783.3 781.6 784.5 ****** ****** 787.5 787.4 787.7 789.3 790.7 788.2 ****** MAX. QFE PRESSURE IN HPA 792.0 788.6 787.4 788.0 ****** ****** 792.4 792.0 792.8 795.8 796.9 792.1 ****** DAY 26 24 29 8 ** ** 4 30 26 2 16 8 MIN. QFE PRESSURE IN HPA 777.9 776.5 777.2 777.8 ****** ****** 782.2 782.7 780.8 781.8 786.9 784.1 ****** DAY 19 2 19 13 ** ** 7 8 22 27 29 14 MEAN QNH PRESSURE IN HPA 1018.2 1015.8 1013.8 1017.3 ****** ****** 1021.0 1020.9 1021.2 1023.2 1025.0 1021.9 ****** MAX. QNH PRESSURE IN HPA 1026.6 1022.4 1020.9 1021.7 ****** ****** 1027.1 1026.6 1027.6 1031.3 1032.6 1026.7 ****** DAY 26 24 29 8 ** ** 4 30 26 2 16 8 MIN. QNH PRESSURE IN HPA 1009.2 1007.5 1008.3 1009.1 ****** ****** 1014.5 1015.1 1012.8 1014.0 1020.3 1016.8 ****** DAY 19 2 19 13 ** ** 7 8 22 27 29 14 MEAN QFF PRESSURE IN HPA 1024.9 1018.2 1015.7 1014.2 ****** ****** 1002.7 1002.3 1006.0 1014.3 1022.4 1022.4 ****** MAX. QFF PRESSURE IN HPA 1036.5 1028.1 1024.6 1025.0 ****** ****** 1008.2 1010.2 1014.4 1024.3 1034.0 1029.2 ****** DAY 26 24 29 4 ** ** 9 30 25 19 18 19 MIN. QFF PRESSURE IN HPA 1011.8 1006.2 1007.9 1003.4 ****** ****** 995.3 995.6 1001.3 1004.9 1012.4 1017.3 ****** DAY 5 2 25 13 ** ** 7 8 8 27 6 23 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 784.9 783.2 781.6 785.3 788.0 786.3 787.6 787.6 787.7 789.3 790.6 788.1 786.7 MAX. QFE PRESSURE IN HPA 792.0 788.6 787.5 789.5 792.4 788.7 792.4 792.7 793.1 795.9 796.5 792.1 796.5 DAY 26 24 30 30 18 28 4 29 26 2 18 8 MIN. QFE PRESSURE IN HPA 777.1 776.0 777.0 779.0 784.0 782.3 783.0 783.5 781.0 782.2 786.9 783.3 776.0 DAY 19 5 2 13 29 19 7 8 22 27 29 14 MEAN QNH PRESSURE IN HPA 1017.8 1015.8 1013.8 1018.3 1021.7 1019.6 1021.2 1021.2 1021.3 1023.2 1024.9 1021.8 1020.0 MAX. QNH PRESSURE IN HPA 1026.6 1022.4 1021.0 1023.5 1027.1 1022.5 1027.1 1027.5 1027.9 1031.4 1032.1 1026.7 1032.1 DAY 26 24 30 30 18 28 4 29 26 2 18 8 MIN. QNH PRESSURE IN HPA 1008.2 1006.8 1008.1 1010.5 1016.7 1014.6 1015.5 1016.1 1013.0 1014.5 1020.3 1015.9 1006.8 DAY 19 5 2 13 29 19 7 8 22 27 29 14 MEAN QFF PRESSURE IN HPA 1026.3 1019.5 1016.8 1015.3 1011.2 1005.3 1003.6 1003.9 1008.3 1016.7 1024.7 1023.8 1014.6 MAX. QFF PRESSURE IN HPA 1040.5 1031.0 1024.8 1025.7 1016.2 1010.2 1009.2 1012.0 1015.9 1025.3 1036.2 1032.8 1040.5 DAY 26 24 6 4 22 12 9 30 25 19 18 19 MIN. QFF PRESSURE IN HPA 1010.8 1008.4 1009.0 1005.7 1004.4 997.7 997.0 998.8 1001.5 1007.6 1015.0 1016.9 997.0 DAY 6 2 2 18 29 19 29 7 22 27 6 29 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 785.6 784.1 782.3 785.9 788.5 786.6 788.0 788.1 788.2 790.0 791.2 788.8 787.3 MAX. QFE PRESSURE IN HPA 792.0 789.5 787.8 790.2 792.4 789.2 792.3 793.3 793.8 795.9 797.0 793.3 797.0 DAY 26 8 29 30 18 12 4 29 26 2 18 4 MIN. QFE PRESSURE IN HPA 778.9 776.2 777.6 779.4 784.8 782.6 782.5 784.0 782.0 783.2 787.4 784.1 776.2 DAY 6 5 2 13 29 19 7 8 22 27 29 14 MEAN QNH PRESSURE IN HPA 1018.7 1016.8 1014.7 1019.1 1022.3 1019.9 1021.6 1021.8 1021.9 1024.1 1025.6 1022.7 1020.8 MAX. QNH PRESSURE IN HPA 1026.6 1023.5 1021.4 1024.4 1027.1 1023.1 1027.0 1028.2 1028.8 1031.4 1032.8 1028.2 1032.8 DAY 26 8 29 30 18 12 4 29 26 2 18 4 MIN. QNH PRESSURE IN HPA 1010.4 1007.1 1008.8 1011.0 1017.7 1015.0 1014.9 1016.7 1014.2 1015.7 1020.9 1016.8 1007.1 DAY 6 5 2 13 29 19 7 8 22 27 29 14 MEAN QFF PRESSURE IN HPA 1027.2 1020.6 1017.1 1015.9 ****** ****** 1003.3 1003.3 1007.1 1016.4 1024.2 1024.3 ****** MAX. QFF PRESSURE IN HPA 1039.9 1031.1 1025.4 1025.9 ****** ****** 1009.0 1012.5 1014.2 1025.7 1035.3 1031.4 ****** DAY 26 24 29 4 ** ** 9 29 25 19 18 18 MIN. QFF PRESSURE IN HPA 1011.6 1010.8 1008.9 1006.0 ****** ****** 997.0 996.9 1001.4 1007.3 1015.4 1015.5 ****** DAY 6 2 2 18 ** ** 7 8 8 4 6 29 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 785.5 784.1 782.4 785.9 788.4 786.4 787.8 787.8 787.9 789.6 790.9 788.6 787.1 MAX. QFE PRESSURE IN HPA 792.0 789.8 787.8 789.7 792.3 788.8 792.2 793.0 793.5 795.2 796.8 792.7 796.8 DAY 26 8 30 30 18 12 3 29 25 2 18 4 MIN. QFE PRESSURE IN HPA 778.1 776.4 777.3 780.0 784.8 782.7 782.5 783.6 782.1 783.2 787.1 782.7 776.4 DAY 6 5 7 13 29 19 7 8 21 27 6 29 MEAN QNH PRESSURE IN HPA 1018.6 1016.8 1014.7 1019.1 1022.1 1019.7 1021.4 1021.4 1021.5 1023.6 1025.2 1022.4 1020.5 MAX. QNH PRESSURE IN HPA 1026.6 1023.9 1021.4 1023.8 1027.0 1022.6 1026.8 1027.8 1028.4 1030.5 1032.5 1027.5 1032.5 DAY 26 8 30 30 18 12 3 29 25 2 18 4 MIN. QNH PRESSURE IN HPA 1009.4 1007.3 1008.4 1011.8 1017.7 1015.1 1014.9 1016.2 1014.4 1015.7 1020.5 1015.1 1007.3 DAY 6 5 7 13 29 19 7 8 21 27 6 29 MEAN QFF PRESSURE IN HPA 1025.6 1019.6 1016.4 1015.0 ****** ****** 1002.7 1002.5 1005.9 1014.9 1022.7 1022.9 ****** MAX. QFF PRESSURE IN HPA 1036.0 1029.2 1023.2 1026.1 ****** ****** 1008.3 1011.2 1015.0 1023.8 1034.1 1028.9 ****** DAY 26 13 29 4 ** ** 4 29 25 19 18 18 MIN. QFF PRESSURE IN HPA 1010.6 1011.1 1009.0 1006.8 ****** ****** 997.1 996.1 999.9 1005.4 1013.4 1011.8 ****** DAY 6 9 2 18 ** ** 6 7 8 5 6 29 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 784.7 783.2 781.7 785.3 787.7 785.8 786.8 786.9 787.1 788.7 790.1 787.8 786.3 MAX. QFE PRESSURE IN HPA 791.0 788.6 787.2 788.7 791.5 788.0 791.4 792.0 792.6 794.5 795.6 792.1 795.6 DAY 26 8 29 30 17 30 3 29 25 1 18 7 MIN. QFE PRESSURE IN HPA 777.7 777.4 775.0 780.0 785.0 782.2 781.5 782.4 781.0 783.6 786.0 782.3 775.0 DAY 6 5 7 13 28 19 6 7 21 27 28 29 MEAN QNH PRESSURE IN HPA 1017.6 1015.8 1013.8 1018.4 1021.3 1019.0 1020.1 1020.3 1020.6 1022.5 1024.2 1021.4 1019.6 MAX. QNH PRESSURE IN HPA 1025.4 1022.4 1020.7 1022.5 1026.0 1021.7 1025.9 1026.6 1027.3 1029.7 1031.0 1026.7 1031.0 DAY 26 8 29 30 17 30 3 29 25 1 18 7 MIN. QNH PRESSURE IN HPA 1008.9 1008.6 1005.6 1011.8 1017.9 1014.5 1013.6 1014.7 1013.0 1016.2 1019.2 1014.6 1005.6 DAY 6 5 7 13 28 19 6 7 21 27 28 29 MEAN QFF PRESSURE IN HPA 1024.3 1018.1 1015.5 1014.0 ****** ****** 1001.6 1001.5 1005.2 1013.7 1021.6 1021.8 ****** MAX. QFF PRESSURE IN HPA 1035.0 1025.9 1021.8 1025.4 ****** ****** 1006.7 1009.2 1013.7 1023.6 1032.7 1028.0 ****** DAY 26 23 5 4 ** ** 15 29 25 18 18 18 MIN. QFF PRESSURE IN HPA 1010.5 1008.7 1006.7 1005.4 ****** ****** 995.0 994.6 1000.5 1006.2 1012.7 1013.4 ****** DAY 6 9 7 9 ** ** 6 7 8 5 6 29 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 785.1 783.4 781.7 785.2 787.7 785.7 786.4 786.6 787.3 788.9 790.4 788.1 786.4 MAX. QFE PRESSURE IN HPA 791.2 788.6 787.2 788.4 791.7 787.9 791.4 792.0 792.8 794.6 796.0 792.0 796.0 DAY 25 23 29 29 17 12 3 29 25 1 15 4 MIN. QFE PRESSURE IN HPA 779.0 777.8 774.3 779.8 784.7 782.0 781.0 781.8 782.0 783.7 786.4 784.0 774.3 DAY 17 5 7 9 28 18 6 7 21 26 28 16 MEAN QNH PRESSURE IN HPA 1018.1 1016.0 1013.8 1018.2 1021.3 1018.8 1019.7 1019.9 1020.8 1022.7 1024.6 1021.7 1019.6 MAX. QNH PRESSURE IN HPA 1025.6 1022.4 1020.7 1022.1 1026.2 1021.5 1025.9 1026.6 1027.6 1029.8 1031.5 1026.6 1031.5 DAY 25 23 29 29 17 12 3 29 25 1 15 4 MIN. QNH PRESSURE IN HPA 1010.5 1009.1 1004.7 1011.5 1017.6 1014.2 1013.0 1014.0 1014.2 1016.3 1019.7 1016.7 1004.7 DAY 17 5 7 9 28 18 6 7 21 26 28 16 MEAN QFF PRESSURE IN HPA 1026.7 1019.8 1016.6 1015.0 1010.7 1004.4 1002.0 1002.6 1007.7 1016.3 1024.4 1023.7 1014.2 MAX. QFF PRESSURE IN HPA 1039.5 1030.4 1025.0 1025.8 1016.2 1010.3 1008.1 1011.7 1015.4 1025.0 1036.0 1031.7 1039.5 DAY 25 23 5 4 7 7 3 29 30 18 18 18 MIN. QFF PRESSURE IN HPA 1013.2 1009.2 1005.4 1005.2 1003.4 998.1 995.7 995.5 1003.4 1007.9 1016.3 1017.5 995.5 DAY 6 9 7 9 28 18 6 7 8 5 6 29 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 785.5 783.8 782.2 785.0 ****** ****** 787.4 787.5 788.1 789.4 790.9 788.4 ****** MAX. QFE PRESSURE IN HPA 792.0 788.7 788.1 788.1 ****** ****** 792.4 792.0 793.5 795.7 796.9 792.4 ****** DAY 25 23 29 3 ** ** 3 29 25 1 15 7 MIN. QFE PRESSURE IN HPA 779.5 777.3 775.7 779.0 ****** ****** 782.8 783.0 781.8 783.5 786.7 784.1 ****** DAY 18 1 18 12 ** ** 6 7 21 26 28 16 MEAN QNH PRESSURE IN HPA 1018.6 1016.4 1014.5 1017.9 ****** ****** 1020.9 1021.0 1021.8 1023.4 1025.2 1022.1 ****** MAX. QNH PRESSURE IN HPA 1026.6 1022.5 1021.8 1021.8 ****** ****** 1027.1 1026.6 1028.4 1031.2 1032.6 1027.1 ****** DAY 25 23 29 3 ** ** 3 29 25 1 15 7 MIN. QNH PRESSURE IN HPA 1011.2 1008.4 1006.5 1010.5 ****** ****** 1015.2 1015.5 1014.0 1016.1 1020.0 1016.8 ****** DAY 18 1 18 12 ** ** 6 7 21 26 28 16 MEAN QFF PRESSURE IN HPA 1027.1 1020.3 1016.8 1015.7 ****** ****** 1002.7 1002.8 1007.2 1015.9 1023.8 1023.9 ****** MAX. QFF PRESSURE IN HPA 1039.5 1030.7 1026.0 1025.6 ****** ****** 1008.8 1012.9 1013.9 1025.4 1034.4 1031.4 ****** DAY 25 23 28 4 ** ** 3 29 30 18 18 18 MIN. QFF PRESSURE IN HPA 1014.0 1008.9 1008.1 1004.8 ****** ****** 997.4 996.1 1002.2 1006.8 1015.2 1016.3 ****** DAY 6 1 7 12 ** ** 6 7 21 5 6 29 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 785.3 783.6 782.1 784.8 ****** ****** 787.7 787.7 788.0 789.4 790.9 788.3 ****** MAX. QFE PRESSURE IN HPA 792.0 789.1 788.1 788.1 ****** ****** 792.8 793.0 793.3 795.9 796.9 792.4 ****** DAY 25 23 29 3 ** ** 3 29 25 1 15 7 MIN. QFE PRESSURE IN HPA 778.5 777.0 776.2 778.0 ****** ****** 782.8 783.0 780.8 782.9 786.9 784.1 ****** DAY 18 1 18 12 ** ** 6 7 21 26 28 16 MEAN QNH PRESSURE IN HPA 1018.4 1016.2 1014.4 1017.8 ****** ****** 1021.3 1021.2 1021.6 1023.3 1025.2 1022.0 ****** MAX. QNH PRESSURE IN HPA 1026.6 1023.0 1021.8 1021.8 ****** ****** 1027.6 1027.8 1028.2 1031.4 1032.6 1027.1 ****** DAY 25 23 29 3 ** ** 3 29 25 1 15 7 MIN. QNH PRESSURE IN HPA 1009.9 1008.1 1007.1 1009.3 ****** ****** 1015.2 1015.5 1012.8 1015.4 1020.3 1016.8 ****** DAY 18 1 18 12 ** ** 6 7 21 26 28 16 MEAN QFF PRESSURE IN HPA 1025.4 1019.2 1015.9 1014.7 ****** ****** 1002.7 1002.6 1006.2 1014.9 1022.8 1022.6 ****** MAX. QFF PRESSURE IN HPA 1037.3 1027.9 1024.8 1024.4 ****** ****** 1009.2 1012.1 1014.8 1025.0 1033.8 1030.1 ****** DAY 25 23 28 4 ** ** 3 29 24 18 17 18 MIN. QFF PRESSURE IN HPA 1013.9 1007.4 1008.8 1002.0 ****** ****** 998.0 996.0 999.9 1006.0 1015.4 1017.4 ****** DAY 4 1 18 12 ** ** 28 7 21 4 2 29 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.7 -7.3 -3.4 4.6 11.4 17.7 21.1 22.7 15.1 12.5 3.3 -2.1 7.6 MINIMUN AIR TEMPERATURE (C) -8.6 -13.1 -7.8 -0.5 5.3 9.4 12.3 13.6 6.8 4.8 -0.8 -6.3 1.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 23 28 26 7 0 0 0 0 0 0 2 22 108 DAYS WITH FREEZING MIN.<= 0 31 28 31 14 0 0 0 0 0 2 20 30 156 TEMPERATURE RECORDS LOWEST(C) -22.6 -22.0 -17.6 -12.4 0.6 4.0 8.0 8.8 0.8 -0.6 -4.6 -15.2 -22.6 DAY 29 6 9 12 5 3 6 31 15 30 29 28 MAXIMUM AIR TEMPERATURE (C) 0.1 -1.7 0.5 9.8 17.5 24.7 28.9 31.1 22.5 17.1 6.8 1.8 13.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 14 27 0 0 0 0 41 DAYS WITH MAXIMUM TEMP. <= 0 16 21 14 3 0 0 0 0 0 0 0 8 62 TEMPERATURE RECORDS HIGHEST(C) 8.4 5.6 7.8 23.0 24.6 29.0 34.4 33.4 26.4 21.8 12.0 10.2 34.4 DAY 6 18 31 25 28 29 28 17 20 16 17 8 DIF. BETWEEN (MAX.-MIN.) (C) 8.7 11.4 8.3 10.3 12.2 15.3 16.6 17.5 15.7 12.3 7.6 8.1 12.1 MEAN DAILY TEMP. (MDT) (C) -4.3 -7.4 -3.7 4.7 11.4 17.0 20.6 22.4 14.7 11.0 3.0 -2.3 7.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.8 26.8 48.7 0.0 0.0 0.0 0.0 76.3 HEATING DEG. DAYS(BASE 18 0C) 691.0 711.6 671.2 400.0 204.8 45.0 6.4 0.0 99.8 217.9 450.8 628.9 4127.4 DEWPOINT (MEAN C) -11.0 -14.4 -9.3 -4.3 1.6 3.1 4.4 2.3 -1.3 2.0 -0.5 -6.5 -2.8 MIXING RATIO (G/KG) 2.27 1.82 2.58 3.71 5.58 6.26 7.09 5.95 4.54 5.70 4.75 3.08 4.44 VAPOUR PRESSURE (HPA) 2.85 2.28 3.22 4.65 7.00 7.82 8.82 7.45 5.71 7.18 5.98 3.87 5.57 SATURATION DEF. (HPA) 1.78 1.50 1.73 4.80 7.16 13.38 17.48 21.42 12.34 7.92 1.94 1.58 7.75 RELATIVE HUMIDITY (MEAN %) 64 59 66 56 54 40 38 29 36 52 78 73 54 RELATIVE HUMIDITY (MAX. %) 77 71 78 72 76 61 57 43 56 69 89 84 69 RELATIVE HUMIDITY (MIN. %) 50 47 54 40 35 26 22 16 21 41 66 63 40 RELATIVE HUMIDITY (MEAN% 03UTC) 66 63 70 65 71 58 54 41 53 68 87 78 65 RELATIVE HUMIDITY (MEAN% 09UTC) 58 54 62 47 41 30 30 22 26 43 72 68 46 RELATIVE HUMIDITY (MEAN% 15UTC) 63 57 63 50 43 30 26 20 26 53 79 76 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 47.8 9.7 41.9 88.9 38.5 5.0 4.8 0.0 0.0 17.0 99.8 37.3 390.7 DAYS WITH PRECIPITATION >=10 1 0 1 3 1 0 0 0 0 0 4 1 11 DAYS WITH PRECIPITATION >= 5 3 0 1 6 1 0 0 0 0 2 5 2 20 DAYS WITH PRECIPITATION >= 1 6 4 9 8 5 2 1 0 0 4 9 6 54 DAYS WITH PRECIPITATION 6 10 13 11 12 2 2 0 0 5 10 11 82 GREATEST DAILY PRECIPITATION 27.0 2.6 18.0 32.0 23.4 3.0 4.8 0.0 0.0 7.0 28.0 18.0 32.0 DAY 10 26 29 5 4 6 4 ** ** 21 3 9 DAY WITH THUNDER STORM 0 0 0 1 4 2 1 0 0 0 0 0 8 DAYS WITH SNOW OR SLEET 6 7 14 6 0 0 0 0 0 0 3 11 47 DAYS WITH DUST 0 0 0 0 0 1 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 270 225 225 225 225 270 315 315 270 270 90 270 270 PREVAILING WIND SPEED(KNOTS) 15.4 12.5 15.2 14.7 14.3 12.7 13.2 13.4 13.9 13.3 9.4 10.6 13.3 PREVAILING WIND PERCENT 17.3 17.4 21.4 27.9 17.3 22.5 22.6 19.4 24.0 32.3 15.3 20.6 18.6 CALMS PERCENT OF WIND 46.0 41.5 38.7 25.4 37.1 43.8 35.5 34.7 32.3 20.6 31.3 32.9 35.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 229 155 150 155 2633 VECTOR WIND DIRECTION (MEAN) 258 240 234 242 254 244 281 267 254 257 176 249 250 VECTOR WIND MAGNITUDE(KNOTS) 5.5 4.8 5.8 7.7 5.0 4.9 4.0 3.7 5.7 8.0 1.6 5.2 4.9 WIND STEADINESES (MEAN %) 72.4 63.2 68.2 78.6 59.5 69.0 53.3 46.8 66.3 76.9 23.5 70.3 59.8 WIND SPEED (MEAN KNOTS) 7.6 7.6 8.5 9.8 8.4 7.1 7.5 7.9 8.6 10.4 6.8 7.4 8.2 FASTEST WIND DIRECTION 320 240 230 220 210 180 320 180 260 240 240 210 180 FASTEST WIND SPEED (KNOTS) 29 29 33 39 33 43 23 25 29 35 21 25 43 DAY 2 22 23 15 3 11 3 17 1 6 5 8 DAYS WITH SKY CLEAR (0-2)/8 16 20 9 7 11 24 29 27 29 18 8 8 206 DAYS WITH P.CLOUDY (3-6)/8 10 5 8 15 17 5 2 4 1 11 12 15 105 DAYS WITH CLOUDY (7-8)/8 5 3 14 8 3 1 0 0 0 2 10 8 54 DAYS WITH VISIBILITY =< 2 KM 5 0 7 5 1 0 0 0 0 0 5 2 25 DURATION OF SUNSHINE HOURS 189.3 238.5 176.1 250.7 290.6 359.4 383.8 363.2 320.8 257.8 143.7 155.3 3129.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 784.4 783.8 781.0 784.6 788.0 785.9 784.2 786.2 789.0 790.4 788.6 785.8 786.0 MAX. QFE PRESSURE IN HPA 790.8 791.0 791.3 791.4 792.8 790.4 788.4 789.5 793.8 795.8 797.3 791.4 797.3 DAY-HOUR 12- 9 16-21 11- 6 24- 6 12- 6 8- 9 19- 6 11- 6 19- 6 9- 6 8- 6 28- 6 MIN. QFE PRESSURE IN HPA 772.9 775.6 772.2 775.0 778.4 780.0 780.3 781.5 784.3 786.2 783.7 777.6 772.2 DAY-HOUR 15-21 5- 6 7- 3 9-12 4-15 30-15 11-12 5-12 12-12 6-12 30-15 10- 3 MEAN QNH PRESSURE IN HPA 1017.2 1016.5 1012.9 1017.4 1021.7 1019.0 1017.0 1019.5 1022.9 1024.6 1022.4 1018.9 1019.2 MAX. QNH PRESSURE IN HPA 1025.1 1025.4 1025.7 1025.9 1027.6 1024.6 1022.1 1023.5 1028.8 1031.3 1033.1 1025.9 1033.1 DAY-HOUR 12- 9 16-21 11- 6 24- 6 12- 6 8- 9 19- 6 11- 6 19- 6 9- 6 8- 6 28- 6 MIN. QNH PRESSURE IN HPA 1003.0 1006.3 1002.1 1005.6 1009.8 1011.8 1012.1 1013.6 1017.1 1019.4 1016.3 1008.8 1002.1 DAY-HOUR 15-21 5- 6 7- 3 9-12 4-15 30-15 11-12 5-12 12-12 6-12 30-15 10- 3 MEAN QFF PRESSURE IN HPA 1022.5 1024.7 1016.9 1013.9 1011.9 1003.8 998.7 1000.1 1010.2 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1037.5 1038.8 1034.8 1028.2 1019.9 1010.5 1004.4 1006.9 1020.2 ****** ****** ****** ****** DAY-HOUR 19- 6 7- 6 11- 6 13- 3 6-21 1- 3 6- 0 31-15 15- 0 **-** **-** **-** MIN. QFF PRESSURE IN HPA 1003.1 1011.5 1003.5 1002.8 1003.7 994.2 991.8 992.5 1001.8 ****** ****** ****** ****** DAY-HOUR 15-21 22- 0 7- 3 28- 0 4- 0 30-12 11-12 4-12 2-18 **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 784.5 783.6 780.5 784.3 787.8 785.8 784.2 786.1 789.0 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 789.9 790.6 789.7 790.6 791.9 789.0 787.0 788.6 792.9 ****** ****** ****** ****** DAY 12 17 11 24 12 8 19 11 19 ** ** ** MIN. QFE PRESSURE IN HPA 773.5 777.4 773.0 775.9 780.2 780.8 781.0 782.4 785.0 ****** ****** ****** ****** DAY 16 5 7 11 5 24 1 5 3 ** ** ** MEAN QNH PRESSURE IN HPA 1017.3 1016.2 1012.4 1017.1 1021.4 1019.0 1016.9 1019.3 1022.9 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1024.0 1024.9 1023.8 1024.9 1026.5 1022.9 1020.4 1022.4 1027.7 ****** ****** ****** ****** DAY 12 17 11 24 12 8 19 11 19 ** ** ** MIN. QNH PRESSURE IN HPA 1003.7 1008.6 1003.1 1006.7 1012.0 1012.8 1013.0 1014.7 1017.9 ****** ****** ****** ****** DAY 16 5 7 11 5 24 1 5 3 ** ** ** MEAN QFF PRESSURE IN HPA 1021.5 1023.4 1015.9 1013.2 1011.7 1004.0 998.4 999.5 1009.7 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.8 1033.9 1031.9 1026.2 1019.1 1010.0 1004.4 1003.7 1020.2 ****** ****** ****** ****** DAY 19 9 11 13 7 5 6 21 15 ** ** ** MIN. QFF PRESSURE IN HPA 1004.1 1011.5 1004.5 1002.8 1003.7 995.5 992.8 994.4 1003.2 ****** ****** ****** ****** DAY 16 22 7 28 4 24 11 4 3 ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 784.2 783.4 780.6 784.3 787.9 785.9 784.3 786.3 789.1 790.4 788.6 785.6 785.9 MAX. QFE PRESSURE IN HPA 789.9 790.2 790.2 791.0 792.2 789.0 787.8 789.0 793.2 794.7 796.1 790.2 796.1 DAY 12 17 11 24 12 8 19 11 19 9 8 28 MIN. QFE PRESSURE IN HPA 773.4 776.0 772.2 775.8 780.4 781.2 781.2 782.4 785.0 787.4 786.5 777.6 772.2 DAY 16 5 7 10 5 24 16 5 3 24 19 10 MEAN QNH PRESSURE IN HPA 1017.0 1015.9 1012.5 1017.1 1021.5 1019.1 1017.1 1019.6 1023.0 1024.6 1022.4 1018.6 1019.0 MAX. QNH PRESSURE IN HPA 1024.0 1024.4 1024.4 1025.4 1026.8 1022.9 1021.4 1022.9 1028.1 1029.9 1031.6 1024.4 1031.6 DAY 12 17 11 24 12 8 19 11 19 9 8 28 MIN. QNH PRESSURE IN HPA 1003.6 1006.8 1002.1 1006.6 1012.3 1013.3 1013.3 1014.7 1017.9 1020.9 1019.8 1008.8 1002.1 DAY 16 5 7 10 5 24 16 5 3 24 19 10 MEAN QFF PRESSURE IN HPA 1023.4 1025.5 1017.2 1014.5 1012.3 1004.3 999.5 1001.3 1011.5 1016.9 1021.5 1022.8 1014.2 MAX. QFF PRESSURE IN HPA 1035.2 1036.7 1034.4 1028.2 1019.2 1010.5 1003.9 1005.5 1020.1 1020.9 1030.8 1037.0 1037.0 DAY 20 7 11 13 12 1 5 31 15 10 8 28 MIN. QFF PRESSURE IN HPA 1004.9 1011.9 1003.5 1004.8 1004.3 995.4 993.2 995.3 1004.9 1011.0 1016.4 1008.8 993.2 DAY 16 22 7 28 4 30 11 5 2 6 5 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 784.8 784.2 781.4 785.0 788.4 786.4 784.7 786.9 789.7 791.0 789.3 786.3 786.5 MAX. QFE PRESSURE IN HPA 790.6 790.8 791.3 791.4 792.8 789.7 788.4 789.5 793.8 795.8 797.3 791.4 797.3 DAY 12 17 11 24 12 8 19 11 19 9 8 28 MIN. QFE PRESSURE IN HPA 774.7 775.6 772.3 775.8 780.3 781.6 781.4 782.9 785.7 787.7 786.8 778.6 772.3 DAY 16 5 7 10 4 24 16 5 3 2 19 10 MEAN QNH PRESSURE IN HPA 1017.8 1017.0 1013.4 1017.9 1022.2 1019.7 1017.6 1020.3 1023.7 1025.3 1023.2 1019.6 1019.8 MAX. QNH PRESSURE IN HPA 1024.9 1025.1 1025.7 1025.9 1027.6 1023.8 1022.1 1023.5 1028.8 1031.3 1033.1 1025.9 1033.1 DAY 12 17 11 24 12 8 19 11 19 9 8 28 MIN. QNH PRESSURE IN HPA 1005.2 1006.3 1002.3 1006.6 1012.1 1013.8 1013.5 1015.4 1018.8 1021.3 1020.2 1010.0 1002.3 DAY 16 5 7 10 4 24 16 5 3 2 19 10 MEAN QFF PRESSURE IN HPA 1023.7 1026.1 1017.9 1014.5 1012.1 1004.1 999.4 1001.0 1010.6 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1037.5 1038.8 1034.8 1026.9 1019.4 1010.2 1004.4 1004.8 1019.1 ****** ****** ****** ****** DAY 19 7 11 12 12 6 19 21 15 ** ** ** MIN. QFF PRESSURE IN HPA 1007.1 1012.7 1004.9 1006.6 1005.7 997.2 993.0 994.7 1002.2 ****** ****** ****** ****** DAY 16 5 29 26 4 25 11 5 2 ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 784.7 784.2 781.3 785.0 788.4 786.2 784.5 786.5 789.3 790.6 788.8 785.9 786.3 MAX. QFE PRESSURE IN HPA 790.8 789.8 791.2 791.3 792.5 790.4 788.0 789.1 793.3 795.6 796.6 790.8 796.6 DAY 12 17 11 23 12 8 19 10 19 9 8 28 MIN. QFE PRESSURE IN HPA 774.3 776.6 772.6 775.6 779.4 781.0 781.1 782.2 785.2 787.1 786.4 778.5 772.6 DAY 31 5 7 10 4 24 16 5 12 6 25 9 MEAN QNH PRESSURE IN HPA 1017.6 1017.0 1013.4 1017.9 1022.1 1019.5 1017.3 1019.8 1023.3 1024.9 1022.7 1019.1 1019.5 MAX. QNH PRESSURE IN HPA 1025.1 1023.9 1025.6 1025.7 1027.2 1024.6 1021.7 1023.0 1028.2 1031.0 1032.3 1025.1 1032.3 DAY 12 17 11 23 12 8 19 10 19 9 8 28 MIN. QNH PRESSURE IN HPA 1004.7 1007.6 1002.6 1006.3 1011.0 1013.0 1013.1 1014.5 1018.2 1020.5 1019.7 1009.9 1002.6 DAY 31 5 7 10 4 24 16 5 12 6 25 9 MEAN QFF PRESSURE IN HPA 1022.1 1024.1 1016.8 1014.0 1012.3 1003.9 998.5 999.8 1009.9 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.6 1035.5 1032.5 1026.6 1019.4 1010.3 1003.9 1003.4 1016.9 ****** ****** ****** ****** DAY 19 7 11 12 6 6 26 21 15 ** ** ** MIN. QFF PRESSURE IN HPA 1007.1 1012.6 1005.0 1004.8 1004.8 995.0 992.3 993.8 1003.0 ****** ****** ****** ****** DAY 16 22 29 28 31 30 11 5 12 ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 783.8 783.4 780.7 784.3 787.7 785.6 783.6 785.5 788.4 789.9 788.1 785.4 785.5 MAX. QFE PRESSURE IN HPA 790.0 789.1 790.3 790.7 791.8 789.8 787.1 788.4 792.0 794.7 795.5 790.1 795.5 DAY 12 7 11 23 12 8 26 11 19 9 8 28 MIN. QFE PRESSURE IN HPA 773.6 777.6 774.0 775.0 779.1 780.1 780.3 781.5 784.3 786.2 784.6 777.8 773.6 DAY 31 5 29 9 4 30 11 5 12 6 30 9 MEAN QNH PRESSURE IN HPA 1016.5 1016.0 1012.7 1017.0 1021.3 1018.7 1016.2 1018.6 1022.1 1024.0 1021.7 1018.5 1018.6 MAX. QNH PRESSURE IN HPA 1024.1 1023.0 1024.5 1025.0 1026.3 1023.9 1020.5 1022.1 1026.6 1029.9 1030.9 1024.2 1030.9 DAY 12 7 11 23 12 8 26 11 19 9 8 28 MIN. QNH PRESSURE IN HPA 1003.9 1008.8 1004.4 1005.6 1010.7 1011.9 1012.1 1013.6 1017.1 1019.4 1017.5 1009.1 1003.9 DAY 31 5 29 9 4 30 11 5 12 6 30 9 MEAN QFF PRESSURE IN HPA 1020.8 1023.0 1015.9 1013.1 1011.5 1003.4 997.7 998.7 1009.0 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.2 1035.8 1030.3 1025.9 1017.9 1009.7 1003.2 1003.6 1017.3 ****** ****** ****** ****** DAY 19 7 11 13 6 8 5 31 14 ** ** ** MIN. QFF PRESSURE IN HPA 1006.0 1011.6 1005.6 1003.6 1006.1 994.2 991.8 992.5 1002.6 ****** ****** ****** ****** DAY 16 22 29 28 31 30 11 4 2 ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 784.2 783.7 780.8 784.3 787.5 785.3 783.5 785.5 788.4 790.2 788.3 785.9 785.6 MAX. QFE PRESSURE IN HPA 790.3 789.5 790.1 790.6 791.8 789.6 786.8 788.4 791.9 794.7 795.5 790.2 795.5 DAY 12 16 11 23 12 8 26 11 18 9 8 28 MIN. QFE PRESSURE IN HPA 775.6 778.8 774.2 775.1 778.4 780.0 780.6 781.6 784.4 786.5 783.7 778.3 774.2 DAY 15 4 19 9 4 30 2 5 12 6 30 9 MEAN QNH PRESSURE IN HPA 1016.9 1016.3 1012.7 1017.1 1021.1 1018.4 1016.1 1018.6 1022.2 1024.3 1022.1 1019.0 1018.7 MAX. QNH PRESSURE IN HPA 1024.5 1023.5 1024.2 1024.9 1026.3 1023.6 1020.2 1022.1 1026.5 1029.9 1030.9 1024.4 1030.9 DAY 12 16 11 23 12 8 26 11 18 9 8 28 MIN. QNH PRESSURE IN HPA 1006.3 1010.3 1004.6 1005.7 1009.8 1011.8 1012.5 1013.8 1017.2 1019.8 1016.3 1009.7 1004.6 DAY 15 4 19 9 4 30 2 5 12 6 30 9 MEAN QFF PRESSURE IN HPA 1023.4 1025.7 1017.3 1014.3 1011.8 1003.5 998.4 1000.3 1010.8 1016.6 1021.2 1023.2 1013.9 MAX. QFF PRESSURE IN HPA 1036.4 1038.1 1033.8 1027.9 1018.9 1009.9 1002.3 1006.9 1017.7 1021.0 1030.4 1037.8 1038.1 DAY 19 7 10 13 11 8 18 31 14 8 7 28 MIN. QFF PRESSURE IN HPA 1007.5 1013.3 1006.1 1005.4 1004.2 994.4 992.3 994.7 1004.1 1010.3 1017.0 1010.4 992.3 DAY 15 21 28 27 4 29 11 5 2 6 4 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 784.6 784.1 781.3 784.9 788.2 785.9 784.5 786.5 789.3 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 790.3 790.5 790.3 791.1 792.2 790.0 787.4 789.1 792.9 ****** ****** ****** ****** DAY 12 16 11 23 8 8 26 10 18 ** ** ** MIN. QFE PRESSURE IN HPA 774.4 779.1 774.8 776.2 779.5 781.1 781.4 782.6 785.0 ****** ****** ****** ****** DAY 15 4 6 9 4 24 16 5 12 ** ** ** MEAN QNH PRESSURE IN HPA 1017.4 1016.9 1013.4 1017.8 1021.9 1019.1 1017.3 1019.8 1023.3 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1024.5 1024.7 1024.5 1025.5 1026.8 1024.1 1020.9 1023.0 1027.7 ****** ****** ****** ****** DAY 12 16 11 23 8 8 26 10 18 ** ** ** MIN. QNH PRESSURE IN HPA 1004.9 1010.7 1005.4 1007.1 1011.2 1013.1 1013.5 1015.0 1017.9 ****** ****** ****** ****** DAY 15 4 6 9 4 24 16 5 12 ** ** ** MEAN QFF PRESSURE IN HPA 1023.5 1025.9 1017.7 1014.3 1011.8 1003.6 999.2 1000.7 1010.2 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1036.9 1038.2 1034.3 1026.6 1019.4 1010.0 1004.1 1005.5 1019.9 ****** ****** ****** ****** DAY 19 6 10 12 6 8 4 31 14 ** ** ** MIN. QFF PRESSURE IN HPA 1005.8 1013.1 1006.6 1005.6 1005.1 995.1 994.3 995.0 1001.8 ****** ****** ****** ****** DAY 15 21 28 27 30 30 11 5 2 ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 784.4 784.1 781.2 784.8 788.3 786.0 784.6 786.6 789.3 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 790.0 791.0 790.3 790.8 792.2 789.8 787.4 789.0 792.9 ****** ****** ****** ****** DAY 11 16 11 23 11 8 26 11 18 ** ** ** MIN. QFE PRESSURE IN HPA 772.9 778.6 774.4 776.5 780.3 781.1 781.8 782.8 785.1 ****** ****** ****** ****** DAY 15 4 6 9 4 24 11 5 2 ** ** ** MEAN QNH PRESSURE IN HPA 1017.3 1016.8 1013.2 1017.7 1022.0 1019.1 1017.5 1019.9 1023.2 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1024.1 1025.4 1024.5 1025.1 1026.8 1023.9 1020.9 1022.9 1027.7 ****** ****** ****** ****** DAY 11 16 11 23 11 8 26 11 18 ** ** ** MIN. QNH PRESSURE IN HPA 1003.0 1010.0 1004.9 1007.5 1012.1 1013.1 1014.0 1015.2 1018.1 ****** ****** ****** ****** DAY 15 4 6 9 4 24 11 5 2 ** ** ** MEAN QFF PRESSURE IN HPA 1022.0 1023.9 1016.5 1013.7 1012.1 1003.5 998.8 1000.0 1009.9 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.7 1034.3 1032.3 1026.9 1019.9 1010.1 1003.4 1005.6 1019.3 ****** ****** ****** ****** DAY 19 6 10 12 6 4 5 31 14 ** ** ** MIN. QFF PRESSURE IN HPA 1003.1 1013.4 1006.6 1003.2 1005.2 995.8 993.3 994.2 1002.2 ****** ****** ****** ****** DAY 15 21 6 27 30 30 10 4 2 ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -6.3 -5.4 -0.6 8.7 13.5 21.3 23.1 23.5 16.9 10.7 6.7 2.7 9.6 MINIMUN AIR TEMPERATURE (C) -11.1 -10.7 -5.0 2.4 5.6 10.4 12.9 14.1 8.8 3.8 1.3 -2.4 2.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 31 26 19 0 0 0 0 0 0 0 0 12 88 DAYS WITH FREEZING MIN.<= 0 31 28 29 7 0 0 0 0 0 3 11 24 133 TEMPERATURE RECORDS LOWEST(C) -17.6 -20.0 -12.2 -3.8 0.6 6.0 8.4 9.0 4.0 -0.8 -3.0 -8.6 -20.0 DAY 10 22 26 1 4 1 7 5 25 25 13 23 MAXIMUM AIR TEMPERATURE (C) -2.9 -1.9 2.8 12.9 17.8 26.4 28.8 29.5 24.7 18.3 13.3 9.0 14.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 10 18 1 0 0 0 32 DAYS WITH MAXIMUM TEMP. <= 0 28 20 5 0 0 0 0 0 0 0 0 0 53 TEMPERATURE RECORDS HIGHEST(C) 2.4 4.4 8.8 21.0 25.4 31.0 35.0 33.0 32.4 23.4 16.8 17.0 35.0 DAY 17 6 12 15 28 27 12 28 1 4 6 10 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 8.8 7.8 10.5 12.2 16.0 15.9 15.4 15.9 14.5 12.0 11.4 12.4 MEAN DAILY TEMP. (MDT) (C) -7.0 -6.3 -1.1 7.6 11.7 18.4 20.9 21.8 16.7 11.1 7.3 3.3 8.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.9 27.0 49.6 2.7 0.0 0.0 0.0 80.2 HEATING DEG. DAYS(BASE 18 0C) 775.1 680.1 592.9 311.0 194.3 18.6 1.2 2.9 50.6 215.4 322.2 456.9 3621.2 DEWPOINT (MEAN C) -10.2 -9.6 -4.8 -0.6 2.7 4.1 6.3 3.9 0.5 -4.6 -3.4 -6.3 -1.8 MIXING RATIO (G/KG) 2.35 2.47 3.54 4.78 6.04 6.66 7.98 6.57 5.15 3.59 3.92 3.15 4.68 VAPOUR PRESSURE (HPA) 2.94 3.10 4.43 5.99 7.57 8.35 9.93 8.24 6.48 4.54 4.95 3.97 5.87 SATURATION DEF. (HPA) 0.97 1.19 1.56 5.96 8.70 18.01 19.40 22.02 13.82 9.09 5.23 3.79 9.14 RELATIVE HUMIDITY (MEAN %) 76 74 75 56 52 35 38 31 36 39 54 57 52 RELATIVE HUMIDITY (MAX. %) 83 81 82 76 78 59 62 53 56 59 73 76 70 RELATIVE HUMIDITY (MIN. %) 68 66 68 42 36 23 24 20 20 23 34 38 39 RELATIVE HUMIDITY (MEAN% 03UTC) 78 76 80 74 77 59 62 53 54 54 65 70 67 RELATIVE HUMIDITY (MEAN% 09UTC) 72 71 72 48 42 29 31 24 26 27 41 46 44 RELATIVE HUMIDITY (MEAN% 15UTC) 77 77 75 54 47 28 29 23 25 32 50 49 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 73.4 23.5 140.8 92.0 69.6 2.0 9.3 0.0 0.0 2.7 13.6 3.5 430.4 DAYS WITH PRECIPITATION >=10 2 0 3 3 2 0 0 0 0 0 1 0 11 DAYS WITH PRECIPITATION >= 5 5 1 4 6 6 0 1 0 0 0 1 0 24 DAYS WITH PRECIPITATION >= 1 16 7 9 7 10 0 2 0 0 1 2 1 55 DAYS WITH PRECIPITATION 18 13 14 8 10 3 5 2 1 1 6 3 84 GREATEST DAILY PRECIPITATION 14.0 6.4 56.0 35.0 20.0 0.9 7.0 0.0 0.0 2.7 10.0 2.3 56.0 DAY 26 8 18 4 13 4 30 ** ** 10 16 27 DAY WITH THUNDER STORM 0 0 1 1 6 2 1 0 0 0 0 0 11 DAYS WITH SNOW OR SLEET 14 9 10 4 0 0 0 0 0 0 0 1 38 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 225 225 225 225 270 90 90 270 270 225 225 225 PREVAILING WIND SPEED(KNOTS) 14.8 14.1 13.3 13.9 14.8 15.5 10.9 10.7 12.3 10.4 13.0 11.4 13.0 PREVAILING WIND PERCENT 16.8 30.7 35.5 23.3 21.3 14.7 16.1 15.9 21.3 17.7 19.6 19.0 17.7 CALMS PERCENT OF WIND 47.7 16.4 20.6 27.3 21.9 28.7 21.9 31.9 35.0 36.7 41.7 41.5 32.3 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 182 240 248 240 248 2218 VECTOR WIND DIRECTION (MEAN) 259 253 233 238 221 203 246 215 252 246 241 233 240 VECTOR WIND MAGNITUDE(KNOTS) 3.5 9.1 7.3 5.8 4.8 2.1 0.7 0.8 4.4 2.3 5.2 4.3 4.1 WIND STEADINESES (MEAN %) 53.0 70.5 75.3 60.4 53.3 23.3 7.8 10.4 58.7 33.3 74.3 67.2 48.8 WIND SPEED (MEAN KNOTS) 6.6 12.9 9.7 9.6 9.0 9.0 9.0 7.7 7.5 6.9 7.0 6.4 8.4 FASTEST WIND DIRECTION 300 230 240 190 240 110 230 230 230 240 210 240 240 FASTEST WIND SPEED (KNOTS) 29 35 41 31 33 33 27 31 33 23 35 33 41 DAY 13 8 30 17 21 20 6 17 24 1 30 17 DAYS WITH SKY CLEAR (0-2)/8 7 10 11 9 13 24 27 25 29 25 16 11 207 DAYS WITH P.CLOUDY (3-6)/8 8 6 11 15 15 6 3 6 1 4 12 15 102 DAYS WITH CLOUDY (7-8)/8 16 12 9 6 3 0 1 0 0 2 2 5 56 DAYS WITH VISIBILITY =< 2 KM 8 6 4 1 0 0 0 0 0 0 4 3 26 DURATION OF SUNSHINE HOURS 119.0 150.3 211.7 246.2 313.7 366.1 367.1 342.1 326.3 288.1 218.9 191.6 3141.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 782.5 783.9 783.5 786.4 787.7 788.2 785.4 788.3 788.3 790.7 790.2 789.5 787.1 MAX. QFE PRESSURE IN HPA 790.0 794.5 790.6 797.0 795.5 792.7 791.4 792.3 792.2 796.3 795.8 795.7 797.0 DAY-HOUR 22- 9 23- 6 28- 6 12- 9 8- 6 17- 6 20- 6 29- 6 19- 6 13-18 21- 6 9- 6 MIN. QFE PRESSURE IN HPA 771.8 773.8 774.5 778.7 781.3 783.9 779.9 784.4 784.2 785.7 784.4 782.8 771.8 DAY-HOUR 13- 3 15- 3 18-12 23-15 21-12 30-15 8-15 22-12 4-12 30-12 11- 0 24- 3 MEAN QNH PRESSURE IN HPA 1014.9 1016.6 1016.1 1019.7 1021.3 1021.9 1018.4 1022.1 1022.0 1025.0 1024.3 1023.6 1020.5 MAX. QNH PRESSURE IN HPA 1024.1 1029.7 1024.9 1032.8 1030.9 1027.5 1025.9 1027.0 1026.8 1031.9 1031.3 1031.2 1032.8 DAY-HOUR 22- 9 23- 6 28- 6 12- 9 8- 6 17- 6 20- 6 29- 6 19- 6 13-18 21- 6 9- 6 MIN. QNH PRESSURE IN HPA 1001.6 1004.1 1005.0 1010.2 1013.4 1016.6 1011.7 1017.2 1017.0 1018.8 1017.2 1015.2 1001.6 DAY-HOUR 13- 3 15- 3 18-12 23-15 21-12 30-15 8-15 22-12 4-12 30-12 11- 0 24- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1007.5 1016.2 1019.1 1022.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1016.4 1024.8 1028.0 1033.9 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 26- 3 13-15 25- 6 29- 9 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 999.0 1005.1 1009.4 1011.4 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 4-12 1-21 10- 0 24- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 788.2 790.5 790.1 789.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 791.3 795.4 795.0 794.7 ****** DAY ** ** ** ** ** ** ** ** 19 14 22 10 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 785.3 786.2 784.4 783.3 ****** DAY ** ** ** ** ** ** ** ** 5 2 11 24 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1021.9 1024.7 1024.3 1023.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1025.7 1030.8 1030.3 1029.9 ****** DAY ** ** ** ** ** ** ** ** 19 14 22 10 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1018.3 1019.4 1017.2 1015.9 ****** DAY ** ** ** ** ** ** ** ** 5 2 11 24 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1006.7 1015.2 1018.2 1020.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1013.8 1023.2 1026.2 1031.3 ****** DAY ** ** ** ** ** ** ** ** 29 11 25 29 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1000.0 1005.3 1009.4 1011.4 ****** DAY ** ** ** ** ** ** ** ** 1 2 10 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 782.1 783.4 783.2 786.1 787.6 788.4 785.7 788.5 788.4 790.7 790.1 789.3 787.0 MAX. QFE PRESSURE IN HPA 788.9 793.9 790.1 795.7 794.7 792.5 791.2 791.9 791.3 795.4 794.6 794.9 795.7 DAY 22 23 28 12 8 17 20 29 19 14 21 9 MIN. QFE PRESSURE IN HPA 771.8 773.8 776.6 778.8 782.0 785.6 781.0 785.5 785.3 787.1 785.1 782.8 771.8 DAY 13 15 15 24 21 27 5 13 5 2 11 24 MEAN QNH PRESSURE IN HPA 1014.4 1016.0 1015.7 1019.3 1021.2 1022.1 1018.8 1022.3 1022.2 1025.0 1024.2 1023.3 1020.4 MAX. QNH PRESSURE IN HPA 1022.8 1028.9 1024.2 1031.2 1029.9 1027.2 1025.6 1026.5 1025.7 1030.8 1029.8 1030.2 1031.2 DAY 22 23 28 12 8 17 20 29 19 14 21 9 MIN. QNH PRESSURE IN HPA 1001.6 1004.1 1007.6 1010.3 1014.2 1018.7 1013.0 1018.6 1018.3 1020.5 1018.1 1015.2 1001.6 DAY 13 15 15 24 21 27 5 13 5 2 11 24 MEAN QFF PRESSURE IN HPA 1022.7 1023.6 1018.3 1014.0 1011.6 1006.3 1000.9 1004.3 1008.9 1017.8 1020.3 1022.7 1014.3 MAX. QFF PRESSURE IN HPA 1033.4 1040.5 1029.3 1023.8 1023.1 1014.2 1007.9 1008.1 1016.4 1024.7 1027.4 1032.3 1040.5 DAY 23 23 26 12 4 17 21 4 26 25 25 29 MIN. QFF PRESSURE IN HPA 1010.3 1005.5 1007.8 1006.5 1003.2 1000.4 994.2 999.4 1002.9 1009.7 1010.6 1013.8 994.2 DAY 13 8 15 17 29 26 4 13 1 2 10 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 783.0 784.3 783.9 786.8 788.2 788.8 786.1 788.9 789.0 791.5 790.9 790.2 787.6 MAX. QFE PRESSURE IN HPA 789.7 794.5 790.6 796.5 795.5 792.7 791.4 792.3 792.2 796.0 795.8 795.7 796.5 DAY 22 23 28 12 8 17 20 29 19 14 21 9 MIN. QFE PRESSURE IN HPA 773.1 774.8 776.8 779.6 781.9 785.6 781.2 785.7 785.6 787.4 786.4 784.6 773.1 DAY 13 15 17 23 21 2 5 13 5 1 10 24 MEAN QNH PRESSURE IN HPA 1015.4 1017.1 1016.6 1020.2 1021.9 1022.6 1019.3 1022.8 1022.9 1026.0 1025.3 1024.3 1021.2 MAX. QNH PRESSURE IN HPA 1023.8 1029.7 1024.9 1032.1 1030.9 1027.5 1025.9 1027.0 1026.8 1031.5 1031.3 1031.2 1032.1 DAY 22 23 28 12 8 17 20 29 19 14 21 9 MIN. QNH PRESSURE IN HPA 1003.3 1005.4 1007.8 1011.3 1014.1 1018.7 1013.3 1018.8 1018.7 1020.9 1019.7 1017.5 1003.3 DAY 13 15 17 23 21 2 5 13 5 1 10 24 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1008.2 1017.2 1020.3 1023.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1015.4 1024.4 1028.0 1033.2 ****** DAY ** ** ** ** ** ** ** ** 26 9 25 29 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1001.1 1008.9 1011.0 1013.8 ****** DAY ** ** ** ** ** ** ** ** 2 1 10 18 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 782.9 784.2 783.7 786.8 788.0 788.5 785.7 788.5 788.6 791.0 790.3 789.7 787.4 MAX. QFE PRESSURE IN HPA 790.0 794.2 790.6 797.0 795.4 792.2 790.8 792.2 791.8 795.8 795.1 795.3 797.0 DAY 22 23 28 12 8 17 20 29 19 13 21 9 MIN. QFE PRESSURE IN HPA 774.3 775.9 775.0 779.5 781.6 785.2 781.2 785.3 785.2 787.0 785.2 784.9 774.3 DAY 13 15 18 23 21 2 8 13 5 1 10 31 MEAN QNH PRESSURE IN HPA 1015.4 1017.0 1016.4 1020.2 1021.7 1022.3 1018.9 1022.3 1022.3 1025.4 1024.5 1023.8 1020.9 MAX. QNH PRESSURE IN HPA 1024.1 1029.3 1024.9 1032.8 1030.8 1026.8 1025.1 1026.8 1026.3 1031.3 1030.4 1030.7 1032.8 DAY 22 23 28 12 8 17 20 29 19 13 21 9 MIN. QNH PRESSURE IN HPA 1004.7 1006.7 1005.6 1011.2 1013.8 1018.2 1013.3 1018.3 1018.2 1020.4 1018.2 1017.8 1004.7 DAY 13 15 18 23 21 2 8 13 5 1 10 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1007.2 1015.8 1018.5 1021.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1013.7 1023.5 1026.9 1033.9 ****** DAY ** ** ** ** ** ** ** ** 28 10 24 29 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1000.0 1006.3 1009.6 1012.2 ****** DAY ** ** ** ** ** ** ** ** 1 1 10 17 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 782.2 783.6 783.2 786.1 787.4 787.8 784.9 787.6 787.5 790.1 789.5 788.9 786.6 MAX. QFE PRESSURE IN HPA 788.4 793.2 789.3 795.7 794.6 791.6 790.0 790.9 790.9 795.2 794.5 794.3 795.7 DAY 22 22 27 12 8 20 20 29 19 13 21 9 MIN. QFE PRESSURE IN HPA 773.0 775.2 774.5 779.0 781.3 784.5 780.1 784.4 784.2 785.7 784.7 784.0 773.0 DAY 12 15 18 23 21 2 8 22 4 30 10 23 MEAN QNH PRESSURE IN HPA 1014.5 1016.2 1015.7 1019.4 1021.0 1021.4 1017.8 1021.2 1021.1 1024.2 1023.6 1022.8 1019.9 MAX. QNH PRESSURE IN HPA 1022.1 1028.1 1023.3 1031.2 1029.8 1026.1 1024.1 1025.2 1025.2 1030.5 1029.7 1029.4 1031.2 DAY 22 22 27 12 8 20 20 29 19 13 21 9 MIN. QNH PRESSURE IN HPA 1003.1 1005.9 1005.0 1010.5 1013.4 1017.3 1011.9 1017.2 1017.0 1018.8 1017.6 1016.7 1003.1 DAY 12 15 18 23 21 2 8 22 4 30 10 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1006.0 1014.7 1017.5 1020.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1012.4 1023.4 1025.4 1030.9 ****** DAY ** ** ** ** ** ** ** ** 28 10 24 29 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 999.0 1005.8 1010.1 1011.8 ****** DAY ** ** ** ** ** ** ** ** 4 1 9 17 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 782.6 783.9 783.4 786.2 787.3 787.6 784.6 787.4 787.6 790.2 790.0 789.4 786.7 MAX. QFE PRESSURE IN HPA 788.6 793.8 789.0 795.1 794.1 791.4 789.6 790.6 790.6 795.8 795.0 794.9 795.8 DAY 22 22 27 12 8 16 20 29 19 13 21 9 MIN. QFE PRESSURE IN HPA 772.2 775.1 775.5 778.7 781.6 783.9 779.9 784.7 784.6 785.9 784.8 784.4 772.2 DAY 12 14 18 23 21 30 8 22 5 30 10 23 MEAN QNH PRESSURE IN HPA 1014.9 1016.6 1016.0 1019.4 1020.8 1021.2 1017.5 1020.9 1021.2 1024.4 1024.1 1023.4 1020.0 MAX. QNH PRESSURE IN HPA 1022.4 1028.8 1022.9 1030.4 1029.2 1025.9 1023.6 1024.9 1024.9 1031.3 1030.3 1030.2 1031.3 DAY 22 22 27 12 8 16 20 29 19 13 21 9 MIN. QNH PRESSURE IN HPA 1002.1 1005.7 1006.2 1010.2 1013.8 1016.6 1011.7 1017.6 1017.5 1019.1 1017.7 1017.2 1002.1 DAY 12 14 18 23 21 30 8 22 5 30 10 23 MEAN QFF PRESSURE IN HPA 1023.3 1024.2 1018.4 1013.9 1011.1 1005.3 999.6 1003.0 1008.1 1017.2 1020.1 1022.9 1013.9 MAX. QFF PRESSURE IN HPA 1036.6 1041.8 1027.8 1023.0 1020.3 1011.2 1006.1 1006.5 1014.8 1024.8 1027.5 1031.2 1041.8 DAY 22 22 21 2 3 16 21 3 25 13 24 28 MIN. QFF PRESSURE IN HPA 1010.6 1010.2 1005.9 1004.3 1003.0 999.5 992.4 998.8 1002.4 1008.7 1011.5 1015.1 992.4 DAY 12 7 29 21 29 26 4 12 1 1 10 17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 788.4 790.8 790.3 789.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 791.3 796.3 795.3 794.9 ****** DAY ** ** ** ** ** ** ** ** 18 13 21 9 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 785.5 786.6 785.4 784.0 ****** DAY ** ** ** ** ** ** ** ** 4 1 10 23 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1022.2 1025.2 1024.6 1023.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1025.7 1031.9 1030.7 1030.2 ****** DAY ** ** ** ** ** ** ** ** 18 13 21 9 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1018.6 1019.9 1018.4 1016.7 ****** DAY ** ** ** ** ** ** ** ** 4 1 10 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1007.7 1016.4 1019.5 1023.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1014.2 1024.5 1027.8 1031.3 ****** DAY ** ** ** ** ** ** ** ** 26 9 24 28 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1001.4 1007.1 1010.5 1014.4 ****** DAY ** ** ** ** ** ** ** ** 1 1 9 17 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 788.4 790.8 790.3 789.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 791.3 796.0 795.3 794.9 ****** DAY ** ** ** ** ** ** ** ** 18 13 21 9 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 785.3 786.4 785.1 783.3 ****** DAY ** ** ** ** ** ** ** ** 4 1 10 23 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1022.2 1025.1 1024.5 1023.7 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1025.7 1031.5 1030.7 1030.2 ****** DAY ** ** ** ** ** ** ** ** 18 13 21 9 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1018.3 1019.7 1018.1 1015.9 ****** DAY ** ** ** ** ** ** ** ** 4 1 10 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1007.2 1015.6 1018.4 1021.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1014.0 1022.8 1027.3 1031.7 ****** DAY ** ** ** ** ** ** ** ** 28 13 24 28 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1000.1 1005.1 1009.8 1013.1 ****** DAY ** ** ** ** ** ** ** ** 1 1 9 23 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.1 -1.7 1.2 7.2 13.6 19.0 20.6 22.1 16.5 11.0 2.0 -0.7 8.9 MINIMUN AIR TEMPERATURE (C) -8.3 -6.4 -3.7 1.1 5.8 10.4 12.2 14.3 8.2 4.9 -2.0 -4.9 2.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 25 21 16 0 0 0 0 0 0 0 8 17 87 DAYS WITH FREEZING MIN.<= 0 31 28 30 14 2 0 0 0 0 1 24 31 161 TEMPERATURE RECORDS LOWEST(C) -15.6 -12.0 -10.0 -3.0 -3.0 7.0 7.0 8.4 2.8 -0.6 -11.2 -10.8 -15.6 DAY 23 23 5 3 22 5 13 31 28 14 29 17 MAXIMUM AIR TEMPERATURE (C) 1.1 3.1 6.6 13.7 20.7 26.1 28.0 29.8 24.3 18.0 7.5 4.2 15.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 1 11 18 0 0 0 0 30 DAYS WITH MAXIMUM TEMP. <= 0 12 4 1 0 0 0 0 0 0 0 4 4 25 TEMPERATURE RECORDS HIGHEST(C) 7.4 7.6 15.2 19.4 28.6 30.0 33.6 32.0 28.4 24.6 13.0 11.6 33.6 DAY 5 26 31 24 30 20 21 2 7 1 7 31 DIF. BETWEEN (MAX.-MIN.) (C) 9.4 9.5 10.3 12.6 14.9 15.7 15.8 15.5 16.1 13.1 9.5 9.1 12.7 MEAN DAILY TEMP. (MDT) (C) -3.6 -1.6 1.4 7.4 13.2 18.2 20.1 22.0 16.3 11.4 2.7 -0.3 8.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.5 22.3 44.5 0.0 0.0 0.0 0.0 67.3 HEATING DEG. DAYS(BASE 18 0C) 669.2 549.7 513.9 317.9 151.8 17.8 12.8 0.3 61.4 203.2 458.2 568.3 3524.4 DEWPOINT (MEAN C) -7.7 -7.2 -5.4 -2.8 -2.0 -0.5 3.0 2.4 -1.2 -2.2 -4.3 -6.8 -2.9 MIXING RATIO (G/KG) 2.85 2.96 3.35 4.12 4.34 4.83 6.31 6.04 4.61 4.29 3.66 3.06 4.20 VAPOUR PRESSURE (HPA) 3.58 3.71 4.20 5.16 5.45 6.05 7.87 7.56 5.79 5.40 4.61 3.86 5.27 SATURATION DEF. (HPA) 1.10 1.84 2.69 5.48 11.06 16.82 17.63 20.22 14.05 8.49 2.83 2.14 8.70 RELATIVE HUMIDITY (MEAN %) 78 68 64 54 38 30 36 31 34 45 66 66 51 RELATIVE HUMIDITY (MAX. %) 89 81 81 80 62 48 56 50 54 63 82 79 69 RELATIVE HUMIDITY (MIN. %) 65 52 46 31 19 17 21 17 18 28 47 53 35 RELATIVE HUMIDITY (MEAN% 03UTC) 82 71 75 76 53 46 54 46 52 59 76 70 63 RELATIVE HUMIDITY (MEAN% 09UTC) 74 66 52 37 24 20 26 20 22 33 55 59 41 RELATIVE HUMIDITY (MEAN% 15UTC) 74 66 54 41 30 20 24 23 23 41 63 67 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 54.6 41.4 34.3 33.2 9.3 0.3 14.3 4.0 0.0 13.0 32.8 28.4 265.6 DAYS WITH PRECIPITATION >=10 1 2 1 1 0 0 0 0 0 0 1 0 6 DAYS WITH PRECIPITATION >= 5 4 3 2 3 1 0 2 0 0 1 2 1 19 DAYS WITH PRECIPITATION >= 1 8 6 6 4 2 0 2 2 0 4 7 8 49 DAYS WITH PRECIPITATION 13 9 10 8 6 1 2 2 0 7 8 10 76 GREATEST DAILY PRECIPITATION 23.0 16.4 16.7 15.0 5.1 0.3 8.0 3.0 0.0 6.0 14.0 8.9 23.0 DAY 9 18 21 1 4 8 15 18 ** 31 8 10 DAY WITH THUNDER STORM 0 0 0 2 1 0 2 1 0 1 1 0 8 DAYS WITH SNOW OR SLEET 13 6 5 2 0 0 0 0 0 0 6 6 38 DAYS WITH DUST 0 0 1 1 4 2 4 1 2 0 1 0 16 WIND DIRECTION (PREVAILING) 225 225 225 270 270 270 270 270 270 270 270 225 270 PREVAILING WIND SPEED(KNOTS) 8.7 15.5 12.6 14.5 14.1 12.8 12.3 14.6 12.2 14.6 16.8 10.0 13.9 PREVAILING WIND PERCENT 8.9 31.3 21.0 30.4 33.5 30.0 14.5 14.1 29.6 24.2 21.7 19.4 20.8 CALMS PERCENT OF WIND 64.1 33.9 31.0 19.6 14.1 23.8 35.1 38.3 29.2 33.9 36.3 53.2 34.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 251 238 243 249 258 254 247 236 262 257 260 225 251 VECTOR WIND MAGNITUDE(KNOTS) 1.9 8.1 5.1 8.0 8.6 6.2 0.8 2.0 5.7 7.3 5.8 2.4 5.1 WIND STEADINESES (MEAN %) 50.0 82.7 61.4 71.4 72.3 63.3 10.8 26.3 68.7 74.5 65.9 49.0 60.0 WIND SPEED (MEAN KNOTS) 3.8 9.8 8.3 11.2 11.9 9.8 7.4 7.6 8.3 9.8 8.8 4.9 8.5 FASTEST WIND DIRECTION 270 230 140 240 310 210 210 270 210 230 270 240 210 FASTEST WIND SPEED (KNOTS) 25 43 37 39 37 49 31 45 37 47 39 25 49 DAY 30 3 26 13 20 4 14 28 22 9 18 28 DAYS WITH SKY CLEAR (0-2)/8 13 19 17 11 20 26 25 19 29 20 13 15 227 DAYS WITH P.CLOUDY (3-6)/8 6 5 6 17 11 4 5 12 1 9 12 9 97 DAYS WITH CLOUDY (7-8)/8 12 4 8 2 0 0 1 0 0 2 5 7 41 DAYS WITH VISIBILITY =< 2 KM 12 4 0 1 0 1 2 0 0 2 3 4 29 DURATION OF SUNSHINE HOURS 150.4 221.8 239.7 284.0 330.7 369.0 354.4 296.3 334.8 272.3 196.9 178.8 3229.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 785.8 784.3 783.6 785.9 787.3 785.8 784.7 787.5 787.7 789.6 787.8 790.0 786.7 MAX. QFE PRESSURE IN HPA 794.2 790.4 790.7 790.5 794.4 790.5 788.5 793.4 792.6 793.8 793.0 794.3 794.4 DAY-HOUR 2- 6 12- 9 31- 6 11- 9 28- 6 1- 6 19- 6 18-21 30- 6 1- 6 3- 6 5- 9 MIN. QFE PRESSURE IN HPA 775.3 770.9 778.2 775.8 779.3 778.0 779.7 783.2 783.5 783.0 780.5 781.3 770.9 DAY-HOUR 9-12 20-15 21- 3 8- 6 20-12 25- 0 13-15 13-15 12-12 31-15 26- 3 15-18 MEAN QNH PRESSURE IN HPA 1019.0 1017.1 1016.3 1019.0 1020.8 1018.9 1017.6 1021.0 1021.2 1023.6 1021.5 1024.1 1020.0 MAX. QNH PRESSURE IN HPA 1029.3 1024.6 1025.0 1024.7 1029.6 1024.7 1022.3 1028.3 1027.3 1028.8 1027.8 1029.4 1029.6 DAY-HOUR 2- 6 12- 9 31- 6 11- 9 28- 6 1- 6 19- 6 18-21 30- 6 1- 6 3- 6 5- 9 MIN. QNH PRESSURE IN HPA 1006.0 1000.5 1009.6 1006.6 1010.9 1009.3 1011.4 1015.7 1016.1 1015.5 1012.4 1013.4 1000.5 DAY-HOUR 9-12 20-15 21- 3 8- 6 20-12 25- 0 13-15 13-15 12-12 31-15 26- 3 15-18 MEAN QFF PRESSURE IN HPA 1023.8 1019.5 1015.9 1013.1 1009.3 1002.7 999.9 1002.2 1007.2 1014.4 1020.4 1025.9 1012.9 MAX. QFF PRESSURE IN HPA 1038.0 1030.2 1027.3 1022.6 1018.0 1009.8 1006.0 1014.2 1016.4 1022.4 1033.8 1039.1 1039.1 DAY-HOUR 2- 6 11- 6 18-18 10- 6 1-18 16- 6 28- 6 20- 0 28- 3 27- 6 29-15 5-15 MIN. QFF PRESSURE IN HPA 1006.2 1001.3 1006.1 1000.3 999.4 990.9 991.3 995.5 1000.5 1008.1 1009.9 1013.2 990.9 DAY-HOUR 9- 3 20-12 26- 9 8- 6 20- 6 25- 0 21-12 13-12 12- 9 12-21 25-21 15-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 785.8 784.2 783.5 785.7 787.0 785.7 784.8 787.5 787.5 789.5 787.5 789.8 786.5 MAX. QFE PRESSURE IN HPA 793.5 789.6 789.5 789.4 793.6 790.4 787.9 792.9 791.1 792.9 792.0 793.7 793.7 DAY 2 13 31 11 28 1 19 20 30 7 3 6 MIN. QFE PRESSURE IN HPA 777.0 775.7 778.4 780.0 781.9 778.0 779.9 783.9 784.5 784.2 781.4 782.8 775.7 DAY 9 21 21 8 14 25 14 14 16 31 26 14 MEAN QNH PRESSURE IN HPA 1018.9 1017.0 1016.1 1018.8 1020.4 1018.9 1017.7 1021.0 1021.1 1023.5 1021.1 1023.9 1019.9 MAX. QNH PRESSURE IN HPA 1028.4 1023.6 1023.5 1023.4 1028.6 1024.6 1021.5 1027.7 1025.5 1027.7 1026.6 1028.7 1028.7 DAY 2 13 31 11 28 1 19 20 30 7 3 6 MIN. QNH PRESSURE IN HPA 1008.1 1006.5 1009.8 1011.8 1014.1 1009.3 1011.7 1016.6 1017.3 1017.0 1013.5 1015.2 1006.5 DAY 9 21 21 8 14 25 14 14 16 31 26 14 MEAN QFF PRESSURE IN HPA 1023.0 1018.5 1015.1 1012.6 1009.1 1002.6 999.9 1002.1 1006.4 1013.5 1019.1 1025.2 1012.2 MAX. QFF PRESSURE IN HPA 1036.5 1026.3 1024.7 1019.9 1015.9 1009.4 1005.9 1014.2 1014.5 1021.4 1031.8 1033.7 1036.5 DAY 2 23 19 10 28 16 28 20 28 27 30 6 MIN. QFF PRESSURE IN HPA 1007.2 1007.5 1007.8 1004.7 1001.4 990.9 992.2 996.8 1001.6 1008.6 1010.0 1013.9 990.9 DAY 9 20 21 8 20 25 22 7 13 11 26 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 785.5 784.1 783.4 785.8 787.2 785.9 785.1 787.7 787.7 789.6 787.5 789.8 786.6 MAX. QFE PRESSURE IN HPA 793.4 789.6 790.2 789.7 794.2 790.3 788.3 792.8 791.3 793.1 792.0 793.4 794.2 DAY 2 13 31 11 28 1 19 20 30 7 3 6 MIN. QFE PRESSURE IN HPA 776.0 775.8 778.2 777.3 781.0 778.6 780.5 784.5 784.5 784.2 780.5 783.2 775.8 DAY 9 20 21 8 20 25 14 7 16 31 26 14 MEAN QNH PRESSURE IN HPA 1018.6 1016.8 1016.0 1018.9 1020.7 1019.1 1018.0 1021.3 1021.2 1023.6 1021.0 1023.8 1019.9 MAX. QNH PRESSURE IN HPA 1028.3 1023.6 1024.4 1023.8 1029.3 1024.5 1022.0 1027.6 1025.7 1027.9 1026.6 1028.3 1029.3 DAY 2 13 31 11 28 1 19 20 30 7 3 6 MIN. QNH PRESSURE IN HPA 1006.8 1006.6 1009.6 1008.4 1013.0 1010.0 1012.4 1017.3 1017.3 1017.0 1012.4 1015.7 1006.6 DAY 9 20 21 8 20 25 14 7 16 31 26 14 MEAN QFF PRESSURE IN HPA 1024.0 1020.1 1016.5 1013.9 1010.0 1003.2 1000.9 1003.5 1008.5 1015.7 1021.0 1026.9 1013.7 MAX. QFF PRESSURE IN HPA 1037.5 1028.5 1024.8 1020.9 1016.8 1009.8 1006.0 1013.7 1016.4 1021.7 1032.8 1037.1 1037.5 DAY 2 12 19 10 28 16 28 20 28 27 30 6 MIN. QFF PRESSURE IN HPA 1006.2 1006.2 1008.0 1001.7 1001.2 993.8 994.3 997.5 1003.4 1011.7 1010.4 1015.4 993.8 DAY 9 20 21 8 20 25 22 7 12 4 25 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 786.2 784.9 784.1 786.4 787.7 786.4 785.4 788.2 788.3 790.3 788.3 790.5 787.2 MAX. QFE PRESSURE IN HPA 794.2 790.3 790.7 790.4 794.4 790.5 788.5 793.4 792.6 793.8 793.0 794.1 794.4 DAY 2 12 31 11 28 1 19 20 30 1 3 6 MIN. QFE PRESSURE IN HPA 776.0 776.3 778.9 775.8 780.4 779.3 781.0 784.7 785.0 784.8 781.5 784.0 775.8 DAY 9 20 21 8 20 25 14 14 16 31 26 15 MEAN QNH PRESSURE IN HPA 1019.4 1017.8 1016.9 1019.7 1021.3 1019.7 1018.4 1021.9 1022.0 1024.5 1022.0 1024.7 1020.7 MAX. QNH PRESSURE IN HPA 1029.3 1024.5 1025.0 1024.6 1029.6 1024.7 1022.3 1028.3 1027.3 1028.8 1027.8 1029.2 1029.6 DAY 2 12 31 11 28 1 19 20 30 1 3 6 MIN. QNH PRESSURE IN HPA 1006.8 1007.2 1010.4 1006.6 1012.3 1010.9 1013.0 1017.6 1017.9 1017.7 1013.6 1016.7 1006.6 DAY 9 20 21 8 20 25 14 14 16 31 26 15 MEAN QFF PRESSURE IN HPA 1025.0 1021.1 1017.0 1013.7 1009.7 1003.6 1000.7 1002.6 1007.8 1015.3 1021.3 1027.2 1013.7 MAX. QFF PRESSURE IN HPA 1038.0 1030.2 1025.8 1022.6 1017.3 1009.8 1006.0 1013.7 1016.2 1022.4 1032.1 1036.7 1038.0 DAY 2 11 5 10 1 16 28 20 28 27 29 5 MIN. QFF PRESSURE IN HPA 1006.8 1007.1 1008.6 1000.3 999.4 994.2 993.3 996.7 1002.3 1010.4 1011.9 1016.8 993.3 DAY 9 20 26 8 20 24 22 13 7 12 25 14 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 786.0 784.9 784.0 786.1 787.5 786.0 785.0 787.8 787.9 789.9 788.1 790.2 787.0 MAX. QFE PRESSURE IN HPA 793.4 790.4 790.3 790.5 794.4 790.0 788.0 792.8 792.0 793.2 792.2 794.3 794.4 DAY 2 12 31 11 28 1 18 19 30 1 3 5 MIN. QFE PRESSURE IN HPA 776.0 774.0 778.4 775.8 781.1 779.5 780.6 784.3 784.4 784.4 782.0 782.5 774.0 DAY 9 20 26 8 20 25 14 13 12 31 26 15 MEAN QNH PRESSURE IN HPA 1019.2 1017.8 1016.7 1019.3 1021.1 1019.2 1017.9 1021.4 1021.5 1024.0 1021.7 1024.4 1020.4 MAX. QNH PRESSURE IN HPA 1028.3 1024.6 1024.5 1024.7 1029.6 1024.1 1021.7 1027.6 1026.6 1028.1 1026.8 1029.4 1029.6 DAY 2 12 31 11 28 1 18 19 30 1 3 5 MIN. QNH PRESSURE IN HPA 1006.8 1004.4 1009.8 1006.6 1013.1 1011.2 1012.5 1017.1 1017.2 1017.2 1014.2 1014.9 1004.4 DAY 9 20 26 8 20 25 14 13 12 31 26 15 MEAN QFF PRESSURE IN HPA 1023.3 1019.5 1015.9 1012.8 1009.3 1002.8 999.9 1002.0 1006.9 1014.0 1019.9 1025.3 1012.6 MAX. QFF PRESSURE IN HPA 1037.0 1027.6 1026.2 1021.4 1016.7 1008.7 1005.6 1012.4 1016.3 1021.6 1031.6 1033.8 1037.0 DAY 2 12 18 10 1 16 28 20 28 27 30 5 MIN. QFF PRESSURE IN HPA 1006.8 1004.5 1006.1 1001.0 1003.7 992.4 992.6 996.5 1000.5 1008.3 1011.3 1014.9 992.4 DAY 9 20 26 8 19 24 22 13 12 12 25 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 785.4 783.8 783.2 785.5 787.0 785.4 784.0 786.9 787.0 789.0 787.4 789.5 786.2 MAX. QFE PRESSURE IN HPA 792.8 789.7 788.9 789.5 793.7 789.5 787.2 792.5 791.4 792.3 791.3 793.5 793.7 DAY 2 12 30 11 28 1 18 19 30 1 3 5 MIN. QFE PRESSURE IN HPA 775.3 771.9 778.8 777.9 779.3 779.0 779.8 783.3 783.5 783.3 781.8 781.5 771.9 DAY 9 20 26 8 20 24 14 14 12 31 26 15 MEAN QNH PRESSURE IN HPA 1018.4 1016.5 1015.7 1018.6 1020.4 1018.4 1016.7 1020.3 1020.4 1022.9 1020.9 1023.5 1019.4 MAX. QNH PRESSURE IN HPA 1027.6 1023.8 1022.8 1023.5 1028.7 1023.5 1020.7 1027.2 1025.9 1027.0 1025.7 1028.4 1028.7 DAY 2 12 30 11 28 1 18 19 30 1 3 5 MIN. QNH PRESSURE IN HPA 1006.0 1001.8 1010.3 1009.2 1010.9 1010.5 1011.5 1015.9 1016.1 1015.9 1014.0 1013.6 1001.8 DAY 9 20 26 8 20 24 14 14 12 31 26 15 MEAN QFF PRESSURE IN HPA 1022.4 1017.9 1014.6 1012.3 1008.9 1002.2 998.8 1001.5 1005.8 1013.1 1019.1 1024.5 1011.8 MAX. QFF PRESSURE IN HPA 1036.3 1026.4 1025.2 1019.9 1015.6 1009.1 1004.5 1013.3 1014.6 1020.3 1030.6 1033.2 1036.3 DAY 2 12 18 10 1 16 27 19 28 26 30 5 MIN. QFF PRESSURE IN HPA 1006.4 1001.3 1006.9 1004.8 1002.8 991.7 991.3 995.5 1001.0 1009.0 1012.0 1013.8 991.3 DAY 9 20 26 13 19 24 21 13 12 31 25 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 785.8 783.9 783.3 785.5 786.8 785.1 783.8 786.7 787.1 789.2 787.8 789.8 786.2 MAX. QFE PRESSURE IN HPA 792.8 790.0 788.9 789.4 793.7 789.8 786.7 792.2 791.4 793.1 791.9 793.9 793.9 DAY 2 12 30 11 28 1 18 19 30 6 15 5 MIN. QFE PRESSURE IN HPA 778.2 770.9 779.2 778.5 781.2 779.0 779.7 783.2 784.1 783.0 782.6 781.4 770.9 DAY 9 20 21 8 20 24 13 13 12 31 26 15 MEAN QNH PRESSURE IN HPA 1018.9 1016.6 1015.9 1018.5 1020.2 1018.1 1016.5 1020.1 1020.6 1023.1 1021.4 1023.9 1019.5 MAX. QNH PRESSURE IN HPA 1027.6 1024.1 1022.8 1023.4 1028.7 1023.9 1020.0 1026.8 1025.9 1027.9 1026.5 1028.9 1028.9 DAY 2 12 30 11 28 1 18 19 30 6 15 5 MIN. QNH PRESSURE IN HPA 1009.6 1000.5 1010.8 1009.9 1013.3 1010.5 1011.4 1015.7 1016.8 1015.5 1015.0 1013.5 1000.5 DAY 9 20 21 8 20 24 13 13 12 31 26 15 MEAN QFF PRESSURE IN HPA 1024.3 1019.7 1016.2 1013.6 1009.3 1002.3 999.3 1002.4 1008.0 1015.4 1021.5 1026.8 1013.2 MAX. QFF PRESSURE IN HPA 1037.7 1027.9 1027.0 1021.1 1016.5 1008.4 1004.7 1011.6 1015.7 1021.2 1033.8 1039.1 1039.1 DAY 2 11 18 10 1 1 17 18 28 26 29 5 MIN. QFF PRESSURE IN HPA 1011.3 1001.4 1009.7 1006.4 1002.9 992.9 992.3 996.1 1002.9 1011.1 1012.0 1014.8 992.3 DAY 9 20 21 13 19 24 21 7 12 12 25 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 786.2 784.4 783.9 786.2 787.5 785.8 784.7 787.5 787.9 789.7 788.2 790.2 786.8 MAX. QFE PRESSURE IN HPA 792.8 790.3 789.8 789.8 794.1 789.7 787.8 793.2 792.1 793.4 792.0 794.1 794.1 DAY 2 12 30 25 28 1 18 18 30 6 2 5 MIN. QFE PRESSURE IN HPA 779.3 772.3 779.7 780.1 783.1 779.0 779.8 783.7 785.1 783.3 782.8 781.3 772.3 DAY 8 20 21 8 13 24 13 13 12 31 25 15 MEAN QNH PRESSURE IN HPA 1019.4 1017.2 1016.6 1019.4 1021.0 1018.9 1017.6 1021.1 1021.6 1023.7 1021.8 1024.4 1020.2 MAX. QNH PRESSURE IN HPA 1027.6 1024.5 1023.9 1023.9 1029.2 1023.8 1021.4 1028.1 1026.7 1028.3 1026.6 1029.2 1029.2 DAY 2 12 30 25 28 1 18 18 30 6 2 5 MIN. QNH PRESSURE IN HPA 1010.9 1002.3 1011.4 1011.9 1015.6 1010.5 1011.5 1016.3 1018.1 1015.9 1015.2 1013.4 1002.3 DAY 8 20 21 8 13 24 13 13 12 31 25 15 MEAN QFF PRESSURE IN HPA 1025.0 1020.4 1016.6 1013.4 1009.2 1002.8 999.9 1001.8 1007.5 1014.6 1021.2 1026.7 1013.3 MAX. QFF PRESSURE IN HPA 1037.5 1029.3 1027.3 1021.7 1018.0 1008.6 1005.2 1012.2 1015.4 1021.9 1032.6 1036.7 1037.5 DAY 2 11 18 10 1 6 15 19 28 26 29 5 MIN. QFF PRESSURE IN HPA 1011.9 1004.9 1010.2 1005.3 1002.0 992.4 992.8 995.7 1002.2 1009.0 1011.6 1014.2 992.4 DAY 8 20 20 13 19 24 21 13 11 12 25 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 786.0 784.4 783.9 786.2 787.6 785.9 785.2 787.8 787.9 789.5 788.1 790.1 786.9 MAX. QFE PRESSURE IN HPA 792.3 790.0 789.7 789.6 794.2 789.5 788.3 793.4 792.5 793.2 792.0 794.0 794.2 DAY 2 12 30 10 28 1 18 18 30 6 2 5 MIN. QFE PRESSURE IN HPA 777.5 774.5 779.0 780.1 782.7 778.4 780.4 783.9 784.8 783.0 782.4 781.5 774.5 DAY 8 20 20 8 13 24 13 13 15 31 25 15 MEAN QNH PRESSURE IN HPA 1019.2 1017.2 1016.6 1019.4 1021.1 1019.0 1018.2 1021.4 1021.6 1023.5 1021.8 1024.2 1020.3 MAX. QNH PRESSURE IN HPA 1027.0 1024.1 1023.8 1023.6 1029.3 1023.5 1022.0 1028.3 1027.2 1028.1 1026.6 1029.1 1029.3 DAY 2 12 30 10 28 1 18 18 30 6 2 5 MIN. QNH PRESSURE IN HPA 1008.7 1005.0 1010.5 1011.9 1015.1 1009.8 1012.3 1016.6 1017.7 1015.5 1014.7 1013.6 1005.0 DAY 8 20 20 8 13 24 13 13 15 31 25 15 MEAN QFF PRESSURE IN HPA 1023.4 1018.9 1015.7 1012.9 1009.2 1002.5 1000.1 1001.9 1007.0 1013.6 1020.1 1025.1 1012.5 MAX. QFF PRESSURE IN HPA 1035.3 1027.0 1027.2 1020.1 1017.7 1009.2 1005.7 1012.0 1015.2 1022.2 1032.1 1034.0 1035.3 DAY 2 11 18 10 1 6 27 19 28 26 29 5 MIN. QFF PRESSURE IN HPA 1009.2 1009.0 1008.1 1005.2 1002.8 992.0 993.2 995.8 1001.5 1008.1 1009.9 1013.2 992.0 DAY 8 3 20 13 19 24 21 13 11 12 25 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.5 -5.1 -0.5 8.8 13.1 18.4 22.5 21.5 16.8 7.9 1.7 -2.1 8.1 MINIMUN AIR TEMPERATURE (C) -9.5 -9.9 -5.4 3.0 5.9 8.5 14.3 13.6 8.4 2.2 -2.3 -6.0 1.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 1 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 25 28 19 0 0 0 0 0 0 0 11 21 104 DAYS WITH FREEZING MIN.<= 0 31 29 28 2 0 0 0 0 0 3 25 30 148 TEMPERATURE RECORDS LOWEST(C) -19.0 -17.8 -11.8 -3.6 0.6 2.0 11.0 4.0 4.4 -1.6 -6.6 -11.6 -19.0 DAY 18 3 1 11 11 13 4 31 27 29 27 23 MAXIMUM AIR TEMPERATURE (C) -1.5 -0.2 4.5 14.9 19.7 26.2 30.1 29.3 24.4 14.0 6.4 1.7 14.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 4 17 15 2 0 0 0 38 DAYS WITH MAXIMUM TEMP. <= 0 22 17 5 0 0 0 0 0 0 0 0 12 56 TEMPERATURE RECORDS HIGHEST(C) 11.0 3.8 12.0 20.4 24.4 33.0 33.0 32.0 31.0 20.0 11.6 7.0 33.0 DAY 1 23 22 14 25 30 10 2 9 11 12 29 DIF. BETWEEN (MAX.-MIN.) (C) 8.0 9.7 9.9 11.9 13.8 17.7 15.8 15.7 16.0 11.8 8.7 7.7 12.2 MEAN DAILY TEMP. (MDT) (C) -5.5 -5.0 -0.4 9.0 12.8 17.4 22.2 21.4 16.4 8.1 2.0 -2.1 8.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 2.9 43.8 35.4 0.9 0.0 0.0 0.0 83.0 HEATING DEG. DAYS(BASE 18 0C) 728.4 668.4 571.8 271.4 160.8 38.2 0.0 3.4 56.9 307.3 479.0 623.8 3909.5 DEWPOINT (MEAN C) -9.4 -10.3 -6.1 -0.8 -0.6 -0.9 1.5 0.7 -2.2 -0.5 -2.2 -6.2 -3.1 MIXING RATIO (G/KG) 2.55 2.36 3.26 4.78 4.82 4.75 5.81 5.46 4.37 4.83 4.21 3.24 4.20 VAPOUR PRESSURE (HPA) 3.19 2.96 4.08 5.99 6.04 5.95 7.26 6.84 5.49 6.07 5.30 4.07 5.27 SATURATION DEF. (HPA) 1.13 1.38 2.13 5.74 9.72 16.48 21.13 19.94 14.71 5.04 1.76 1.26 8.37 RELATIVE HUMIDITY (MEAN %) 77 69 68 55 43 31 29 29 32 61 78 77 54 RELATIVE HUMIDITY (MAX. %) 87 82 82 78 65 52 45 45 53 79 91 88 71 RELATIVE HUMIDITY (MIN. %) 64 56 52 34 25 17 17 16 17 41 58 65 39 RELATIVE HUMIDITY (MEAN% 03UTC) 80 70 75 70 60 51 41 43 49 76 86 80 65 RELATIVE HUMIDITY (MEAN% 09UTC) 73 61 61 40 31 22 21 21 22 49 66 70 45 RELATIVE HUMIDITY (MEAN% 15UTC) 78 72 64 44 33 20 21 19 21 54 77 77 48 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 27.7 29.9 67.0 54.5 19.8 0.4 8.0 0.5 9.5 52.5 15.6 44.6 330.0 DAYS WITH PRECIPITATION >=10 0 1 2 3 0 0 0 0 0 2 0 2 10 DAYS WITH PRECIPITATION >= 5 2 2 4 4 2 0 0 0 1 3 0 3 21 DAYS WITH PRECIPITATION >= 1 9 6 7 6 4 0 2 0 2 9 7 8 60 DAYS WITH PRECIPITATION 15 10 10 8 6 1 3 1 2 10 12 14 92 GREATEST DAILY PRECIPITATION 7.2 14.4 34.0 16.0 8.9 0.4 4.0 0.5 7.6 16.0 4.5 13.0 34.0 DAY 6 25 24 3 19 1 4 10 29 16 6 24 DAY WITH THUNDER STORM 0 0 0 3 1 0 3 0 2 3 0 0 12 DAYS WITH SNOW OR SLEET 14 9 6 0 0 0 0 0 0 0 7 11 47 DAYS WITH DUST 0 0 2 9 8 1 1 1 1 0 0 0 23 WIND DIRECTION (PREVAILING) 180 225 270 270 270 270 90 270 270 270 90 225 270 PREVAILING WIND SPEED(KNOTS) 13.8 11.1 14.6 15.5 12.6 12.4 11.5 12.8 13.4 10.9 9.4 13.0 12.8 PREVAILING WIND PERCENT 18.5 20.3 27.8 26.7 47.6 17.1 24.2 20.6 20.0 13.7 12.1 16.5 19.5 CALMS PERCENT OF WIND 41.9 40.5 22.2 19.2 13.7 35.8 34.3 29.0 25.4 36.3 38.8 32.7 30.8 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 214 242 245 234 254 258 95 249 255 204 185 225 237 VECTOR WIND MAGNITUDE(KNOTS) 5.2 4.6 7.8 8.6 8.9 3.4 2.2 3.0 4.0 3.1 1.0 3.0 4.1 WIND STEADINESES (MEAN %) 65.0 71.9 72.2 71.1 80.9 45.3 28.9 34.9 44.4 46.3 17.9 39.5 48.8 WIND SPEED (MEAN KNOTS) 8.0 6.4 10.8 12.1 11.0 7.5 7.6 8.6 9.0 6.7 5.6 7.6 8.4 FASTEST WIND DIRECTION 210 310 190 210 270 280 250 100 240 190 100 210 210 FASTEST WIND SPEED (KNOTS) 58 29 39 45 39 25 23 31 39 33 21 33 58 DAY 19 7 8 10 6 9 1 10 27 25 17 21 DAYS WITH SKY CLEAR (0-2)/8 10 16 17 9 22 29 23 27 28 18 9 7 215 DAYS WITH P.CLOUDY (3-6)/8 10 6 10 17 7 1 8 3 2 9 12 16 101 DAYS WITH CLOUDY (7-8)/8 11 7 4 4 2 0 0 1 0 4 9 8 50 DAYS WITH VISIBILITY =< 2 KM 11 6 5 3 1 0 0 0 0 3 8 11 48 DURATION OF SUNSHINE HOURS 141.3 218.0 268.2 233.1 343.3 371.4 343.5 348.0 304.3 240.1 179.7 147.2 3138.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 783.0 784.4 783.9 786.7 786.3 785.5 786.6 787.1 787.5 789.4 789.2 786.1 786.3 MAX. QFE PRESSURE IN HPA 791.5 791.4 790.0 791.4 790.4 789.0 793.0 791.1 793.0 792.8 794.9 792.5 794.9 DAY-HOUR 30-21 10-21 27- 6 2- 6 5-15 13- 6 30- 6 23- 6 29- 6 30- 6 17- 6 4- 6 MIN. QFE PRESSURE IN HPA 772.5 773.0 773.3 780.7 781.7 781.3 780.1 781.7 782.3 785.6 784.9 779.0 772.5 DAY-HOUR 21- 9 7- 0 24-12 10- 0 19-18 26-12 10-15 30-12 1- 0 25-12 22-12 15- 3 MEAN QNH PRESSURE IN HPA 1015.5 1017.2 1016.6 1020.0 1019.5 1018.6 1020.0 1020.6 1021.1 1023.3 1023.1 1019.3 1019.6 MAX. QNH PRESSURE IN HPA 1026.0 1025.9 1024.1 1025.9 1024.6 1022.9 1027.8 1025.5 1027.8 1027.6 1030.2 1027.2 1030.2 DAY-HOUR 30-21 10-21 27- 6 2- 6 5-15 13- 6 30- 6 23- 6 29- 6 30- 6 17- 6 4- 6 MIN. QNH PRESSURE IN HPA 1002.5 1003.1 1003.5 1012.6 1013.9 1013.4 1011.9 1013.9 1014.6 1018.7 1017.8 1010.5 1002.5 DAY-HOUR 21- 9 7- 0 24-12 10- 0 19-18 26-12 10-15 30-12 1- 0 25-12 22-12 15- 3 MEAN QFF PRESSURE IN HPA 1021.6 1022.9 1017.8 1012.7 1008.3 1002.9 1000.8 1002.3 1006.8 1016.7 1022.3 1022.2 1013.1 MAX. QFF PRESSURE IN HPA 1035.8 1035.7 1030.2 1021.3 1016.0 1013.6 1009.4 1008.1 1019.6 1025.2 1032.5 1033.7 1035.8 DAY-HOUR 30-15 3-15 3-18 2- 3 6- 3 13-18 30- 6 8- 6 29- 6 29- 3 17- 3 27-15 MIN. QFF PRESSURE IN HPA 1005.5 1005.9 1000.7 1004.8 1001.6 996.7 989.8 995.8 998.7 1010.2 1015.8 1012.0 989.8 DAY-HOUR 21- 9 7- 0 24-12 15- 0 26-12 23-21 11-12 3- 0 2-12 14- 0 22-12 21- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 783.1 784.2 783.7 786.4 786.0 785.4 786.6 787.1 787.4 789.2 789.1 785.9 786.2 MAX. QFE PRESSURE IN HPA 791.0 790.6 789.4 790.1 789.9 788.2 792.0 790.2 790.5 791.7 794.3 791.6 794.3 DAY 31 11 27 2 6 13 31 1 9 6 17 4 MIN. QFE PRESSURE IN HPA 773.5 773.0 776.8 780.7 782.2 782.1 781.0 782.0 782.3 786.4 785.5 779.0 773.0 DAY 21 7 2 10 9 26 11 31 1 14 22 21 MEAN QNH PRESSURE IN HPA 1015.6 1016.9 1016.3 1019.7 1019.2 1018.5 1019.9 1020.6 1020.9 1023.1 1023.1 1019.0 1019.4 MAX. QNH PRESSURE IN HPA 1025.4 1024.9 1023.4 1024.2 1024.0 1021.9 1026.6 1024.4 1024.7 1026.2 1029.4 1026.1 1029.4 DAY 31 11 27 2 6 13 31 1 9 6 17 4 MIN. QNH PRESSURE IN HPA 1003.7 1003.1 1007.8 1012.6 1014.5 1014.4 1013.0 1014.2 1014.6 1019.7 1018.6 1010.5 1003.1 DAY 21 7 2 10 9 26 11 31 1 14 22 21 MEAN QFF PRESSURE IN HPA 1020.8 1021.9 1017.1 1012.2 1008.0 1002.9 1000.6 1002.0 1006.0 1015.7 1021.4 1021.2 1012.5 MAX. QFF PRESSURE IN HPA 1031.6 1031.2 1027.5 1020.0 1014.5 1010.9 1007.8 1007.3 1016.8 1022.7 1030.0 1031.3 1031.6 DAY 31 11 1 4 11 14 30 8 29 16 17 29 MIN. QFF PRESSURE IN HPA 1007.6 1005.9 1002.0 1004.8 1002.5 997.9 990.8 995.8 999.8 1010.2 1016.2 1012.0 990.8 DAY 21 7 24 15 26 25 11 3 1 14 14 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 782.7 784.0 783.6 786.5 786.2 785.7 786.8 787.4 787.5 789.3 789.0 785.7 786.2 MAX. QFE PRESSURE IN HPA 790.5 789.8 789.5 790.6 789.7 788.6 792.4 790.1 791.0 792.0 794.6 791.6 794.6 DAY 1 11 27 2 6 13 31 1 9 6 17 4 MIN. QFE PRESSURE IN HPA 772.9 773.0 776.0 780.9 783.2 782.2 781.0 782.6 783.0 786.7 785.5 779.0 772.9 DAY 21 7 2 10 19 24 11 31 1 14 22 15 MEAN QNH PRESSURE IN HPA 1015.1 1016.7 1016.3 1019.8 1019.4 1018.8 1020.2 1020.9 1021.1 1023.3 1022.9 1018.9 1019.4 MAX. QNH PRESSURE IN HPA 1024.7 1023.9 1023.5 1024.9 1023.8 1022.4 1027.1 1024.2 1025.4 1026.6 1029.8 1026.1 1029.8 DAY 1 11 27 2 6 13 31 1 9 6 17 4 MIN. QNH PRESSURE IN HPA 1003.0 1003.1 1006.8 1012.9 1015.7 1014.5 1013.0 1015.0 1015.5 1020.0 1018.6 1010.5 1003.0 DAY 21 7 2 10 19 24 11 31 1 14 22 15 MEAN QFF PRESSURE IN HPA 1022.1 1023.5 1018.3 1013.0 1008.7 1003.6 1001.6 1003.2 1008.1 1018.0 1023.1 1022.6 1013.8 MAX. QFF PRESSURE IN HPA 1035.2 1032.5 1027.9 1021.3 1016.0 1012.9 1009.0 1007.9 1015.7 1025.2 1032.5 1032.9 1035.2 DAY 31 9 1 2 6 13 31 9 29 29 17 29 MIN. QFF PRESSURE IN HPA 1006.6 1007.4 1002.4 1005.5 1002.4 998.4 991.7 996.1 1000.5 1013.5 1017.7 1012.4 991.7 DAY 21 7 24 21 26 24 11 3 3 14 1 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 783.6 784.8 784.3 787.2 786.8 786.0 787.3 788.0 788.3 790.0 789.8 786.6 786.9 MAX. QFE PRESSURE IN HPA 791.0 790.1 790.0 791.4 789.7 789.0 793.0 791.1 793.0 792.8 794.9 792.5 794.9 DAY 1 11 27 2 6 13 30 23 29 30 17 4 MIN. QFE PRESSURE IN HPA 773.0 774.9 775.8 780.9 784.1 782.4 781.8 783.3 783.3 786.5 786.1 779.8 773.0 DAY 21 7 24 10 20 26 11 30 3 25 22 15 MEAN QNH PRESSURE IN HPA 1016.2 1017.7 1017.1 1020.6 1020.1 1019.2 1020.8 1021.6 1022.0 1024.1 1023.9 1019.9 1020.3 MAX. QNH PRESSURE IN HPA 1025.4 1024.2 1024.1 1025.9 1023.8 1022.9 1027.8 1025.5 1027.8 1027.6 1030.2 1027.2 1030.2 DAY 1 11 27 2 6 13 30 23 29 30 17 4 MIN. QNH PRESSURE IN HPA 1003.1 1005.5 1006.6 1012.9 1016.8 1014.7 1014.0 1015.9 1015.9 1019.8 1019.3 1011.5 1003.1 DAY 21 7 24 10 20 26 11 30 3 25 22 15 MEAN QFF PRESSURE IN HPA 1022.9 1024.0 1018.8 1013.3 1008.9 1003.5 1001.6 1003.2 1007.3 1017.5 1023.4 1023.2 1014.0 MAX. QFF PRESSURE IN HPA 1034.6 1033.6 1027.7 1020.4 1014.1 1012.9 1009.4 1008.1 1019.6 1024.4 1032.2 1033.2 1034.6 DAY 8 11 4 2 2 13 30 8 29 16 17 27 MIN. QFF PRESSURE IN HPA 1006.4 1011.1 1003.4 1007.1 1001.8 997.9 992.3 998.0 1000.2 1011.6 1018.4 1015.5 992.3 DAY 21 7 24 15 26 26 11 3 3 12 22 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 783.1 784.7 784.3 787.1 786.5 785.8 787.0 787.5 787.8 789.6 789.4 786.3 786.6 MAX. QFE PRESSURE IN HPA 790.5 790.0 789.5 790.8 789.6 788.7 792.9 790.7 791.4 792.2 793.8 791.9 793.8 DAY 31 10 27 2 7 17 30 23 29 5 17 4 MIN. QFE PRESSURE IN HPA 772.5 776.0 774.7 782.6 783.5 781.8 781.5 782.7 783.1 786.2 785.6 779.4 772.5 DAY 21 7 24 21 26 26 11 30 1 25 22 15 MEAN QNH PRESSURE IN HPA 1015.6 1017.6 1017.1 1020.5 1019.8 1018.9 1020.4 1021.1 1021.4 1023.6 1023.4 1019.5 1019.9 MAX. QNH PRESSURE IN HPA 1024.7 1024.1 1023.5 1025.1 1023.6 1022.5 1027.7 1025.0 1025.9 1026.8 1028.8 1026.5 1028.8 DAY 31 10 27 2 7 17 30 23 29 5 17 4 MIN. QNH PRESSURE IN HPA 1002.5 1006.8 1005.2 1015.0 1016.1 1014.0 1013.6 1015.1 1015.6 1019.4 1018.7 1011.0 1002.5 DAY 21 7 24 21 26 26 11 30 1 25 22 15 MEAN QFF PRESSURE IN HPA 1020.9 1022.5 1017.8 1012.6 1008.3 1002.8 1000.9 1002.5 1006.4 1016.4 1022.2 1021.7 1012.9 MAX. QFF PRESSURE IN HPA 1031.9 1031.5 1027.0 1019.9 1013.9 1012.1 1009.3 1007.1 1017.5 1022.3 1031.1 1029.1 1031.9 DAY 31 11 3 4 10 13 30 8 29 30 17 27 MIN. QFF PRESSURE IN HPA 1005.5 1012.7 1002.3 1005.6 1001.8 997.7 991.9 997.8 998.8 1011.4 1016.3 1014.5 991.9 DAY 21 7 24 21 26 26 11 3 3 12 13 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 782.4 783.9 783.4 786.4 785.9 785.0 786.1 786.5 786.9 788.9 788.7 785.7 785.8 MAX. QFE PRESSURE IN HPA 790.2 789.7 788.0 789.5 789.0 788.0 792.6 789.4 791.2 791.8 793.1 790.9 793.1 DAY 30 10 27 4 7 13 30 23 29 5 16 4 MIN. QFE PRESSURE IN HPA 773.0 775.8 773.3 781.0 782.1 781.3 780.3 781.7 782.5 785.6 784.9 779.7 773.0 DAY 19 6 24 9 19 26 10 30 2 25 22 15 MEAN QNH PRESSURE IN HPA 1014.7 1016.6 1016.0 1019.7 1019.0 1017.9 1019.3 1019.8 1020.3 1022.7 1022.5 1018.8 1018.9 MAX. QNH PRESSURE IN HPA 1024.4 1023.8 1021.7 1023.5 1022.9 1021.7 1027.3 1023.4 1025.6 1026.3 1027.9 1025.2 1027.9 DAY 30 10 27 4 7 13 30 23 29 5 16 4 MIN. QNH PRESSURE IN HPA 1003.1 1006.6 1003.5 1013.0 1014.4 1013.4 1012.1 1013.9 1014.9 1018.7 1017.8 1011.4 1003.1 DAY 19 6 24 9 19 26 10 30 2 25 22 15 MEAN QFF PRESSURE IN HPA 1019.9 1021.4 1016.5 1012.2 1007.8 1002.3 1000.0 1001.3 1005.6 1015.4 1020.8 1020.9 1012.0 MAX. QFF PRESSURE IN HPA 1030.0 1030.2 1026.2 1019.0 1013.0 1011.5 1008.9 1006.5 1017.9 1021.4 1028.5 1029.2 1030.2 DAY 30 3 3 3 12 13 30 8 29 15 17 27 MIN. QFF PRESSURE IN HPA 1007.3 1011.7 1000.7 1005.8 1001.6 997.3 989.8 996.0 998.7 1010.7 1015.8 1013.9 989.8 DAY 19 6 24 21 26 25 11 3 2 22 22 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 782.7 784.2 783.5 786.3 785.9 784.8 785.7 786.3 786.9 789.0 789.0 786.2 785.9 MAX. QFE PRESSURE IN HPA 790.8 790.1 788.3 789.1 790.4 787.9 791.8 789.2 791.0 791.6 793.7 791.3 793.7 DAY 30 10 26 3 5 30 30 23 29 5 16 4 MIN. QFE PRESSURE IN HPA 774.4 774.6 774.0 781.4 781.8 781.6 780.1 781.9 782.3 786.8 785.2 780.6 774.0 DAY 19 6 24 9 19 26 10 30 2 2 21 15 MEAN QNH PRESSURE IN HPA 1015.2 1017.0 1016.1 1019.6 1019.1 1017.7 1018.9 1019.5 1020.3 1022.9 1022.9 1019.4 1019.0 MAX. QNH PRESSURE IN HPA 1025.1 1024.2 1022.0 1023.0 1024.6 1021.5 1026.3 1023.1 1025.4 1026.1 1028.7 1025.7 1028.7 DAY 30 10 26 3 5 30 30 23 29 5 16 4 MIN. QNH PRESSURE IN HPA 1004.9 1005.1 1004.4 1013.5 1014.0 1013.8 1011.9 1014.1 1014.6 1020.2 1018.2 1012.5 1004.4 DAY 19 6 24 9 19 26 10 30 2 2 21 15 MEAN QFF PRESSURE IN HPA 1022.2 1023.7 1017.9 1012.7 1008.4 1002.6 1000.3 1002.0 1007.5 1017.7 1023.1 1023.1 1013.4 MAX. QFF PRESSURE IN HPA 1035.8 1035.7 1027.8 1020.2 1015.1 1011.7 1008.4 1006.7 1016.8 1023.4 1031.1 1033.7 1035.8 DAY 30 3 3 3 5 13 30 8 29 29 16 27 MIN. QFF PRESSURE IN HPA 1009.3 1010.5 1002.3 1006.1 1003.2 998.3 991.5 997.4 1000.8 1013.5 1018.0 1014.9 991.5 DAY 19 6 24 14 26 26 10 3 3 1 13 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 783.3 784.8 784.1 787.0 786.5 785.6 786.6 787.2 787.8 789.5 789.4 786.4 786.5 MAX. QFE PRESSURE IN HPA 791.1 790.9 789.4 790.4 790.4 788.6 792.5 790.1 791.7 792.3 794.2 791.1 794.2 DAY 30 10 26 1 5 13 30 23 29 5 16 3 MIN. QFE PRESSURE IN HPA 777.0 774.0 775.3 781.5 781.7 782.6 781.0 782.9 783.4 786.8 785.8 780.8 774.0 DAY 20 6 24 9 19 25 10 30 1 13 21 14 MEAN QNH PRESSURE IN HPA 1015.8 1017.6 1016.9 1020.4 1019.8 1018.7 1020.0 1020.6 1021.4 1023.6 1023.4 1019.7 1019.8 MAX. QNH PRESSURE IN HPA 1025.5 1025.2 1023.4 1024.6 1024.6 1022.4 1027.2 1024.2 1026.2 1027.0 1029.3 1025.5 1029.3 DAY 30 10 26 1 5 13 30 23 29 5 16 3 MIN. QNH PRESSURE IN HPA 1008.1 1004.4 1006.0 1013.6 1013.9 1015.0 1013.0 1015.4 1016.0 1020.2 1018.9 1012.8 1004.4 DAY 20 6 24 9 19 25 10 30 1 13 21 14 MEAN QFF PRESSURE IN HPA 1022.6 1024.0 1018.4 1013.0 1008.5 1002.9 1000.8 1002.4 1007.0 1017.1 1022.9 1023.0 1013.5 MAX. QFF PRESSURE IN HPA 1035.2 1035.3 1030.2 1019.7 1014.6 1013.6 1008.1 1008.0 1018.0 1023.7 1030.3 1032.1 1035.3 DAY 8 10 3 1 10 13 30 8 29 15 16 27 MIN. QFF PRESSURE IN HPA 1012.8 1008.9 1002.4 1007.6 1003.0 998.2 992.5 997.0 1001.5 1011.8 1017.0 1015.4 992.5 DAY 4 6 23 28 26 27 10 2 6 11 13 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 783.2 784.7 784.1 786.9 786.5 785.8 786.9 787.3 787.8 789.5 789.3 786.2 786.5 MAX. QFE PRESSURE IN HPA 791.5 791.4 789.6 790.4 790.4 788.6 793.0 789.9 790.8 792.1 794.3 791.4 794.3 DAY 30 10 26 1 5 13 30 23 8 5 16 3 MIN. QFE PRESSURE IN HPA 776.2 774.0 777.0 781.1 782.3 782.6 781.0 782.7 783.4 786.8 785.8 780.0 774.0 DAY 20 6 24 9 19 24 10 30 1 13 21 14 MEAN QNH PRESSURE IN HPA 1015.7 1017.6 1016.9 1020.3 1019.8 1018.9 1020.3 1020.8 1021.4 1023.5 1023.3 1019.4 1019.8 MAX. QNH PRESSURE IN HPA 1026.0 1025.9 1023.6 1024.6 1024.6 1022.4 1027.8 1024.0 1025.1 1026.7 1029.4 1025.9 1029.4 DAY 30 10 26 1 5 13 30 23 8 5 16 3 MIN. QNH PRESSURE IN HPA 1007.1 1004.4 1008.1 1013.1 1014.6 1015.0 1013.0 1015.1 1016.0 1020.2 1018.9 1011.8 1004.4 DAY 20 6 24 9 19 24 10 30 1 13 21 14 MEAN QFF PRESSURE IN HPA 1021.2 1022.7 1017.5 1012.3 1008.1 1002.8 1000.8 1002.4 1006.4 1016.4 1022.1 1021.7 1012.9 MAX. QFF PRESSURE IN HPA 1032.5 1032.3 1028.8 1018.9 1013.9 1013.3 1008.4 1007.4 1015.6 1023.6 1030.2 1029.3 1032.5 DAY 30 10 3 1 12 13 30 8 29 15 16 26 MIN. QFF PRESSURE IN HPA 1010.3 1006.7 1002.7 1006.1 1002.9 996.7 991.4 995.9 1000.8 1010.6 1016.2 1013.8 991.4 DAY 4 6 23 14 26 23 10 2 2 9 13 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.5 -3.8 4.2 8.9 12.3 18.4 20.7 21.8 16.6 9.8 2.8 -1.1 8.8 MINIMUN AIR TEMPERATURE (C) -8.9 -9.2 -1.0 2.3 4.2 9.0 12.6 13.0 8.6 3.7 -2.3 -5.6 2.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 30 28 7 0 0 0 0 0 0 0 8 22 95 DAYS WITH FREEZING MIN.<= 0 31 28 19 4 0 0 0 0 0 4 19 28 133 TEMPERATURE RECORDS LOWEST(C) -16.6 -16.0 -8.0 -2.4 0.4 2.8 8.4 8.6 4.4 -3.0 -13.0 -16.4 -16.6 DAY 28 23 12 13 10 11 22 12 9 20 20 21 MAXIMUM AIR TEMPERATURE (C) -0.0 1.0 9.7 15.5 19.3 26.2 28.6 30.0 24.4 16.3 8.3 2.6 15.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 7 10 22 0 0 0 0 39 DAYS WITH MAXIMUM TEMP. <= 0 15 10 0 0 0 0 0 0 0 0 1 7 33 TEMPERATURE RECORDS HIGHEST(C) 5.6 6.2 17.3 21.0 24.6 32.2 31.6 32.6 28.0 23.4 17.6 6.0 32.6 DAY 10 28 28 5 28 23 6 3 2 5 6 29 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 10.2 10.7 13.2 15.1 17.2 16.0 17.0 15.8 12.6 10.6 8.2 12.9 MEAN DAILY TEMP. (MDT) (C) -4.4 -4.1 4.3 8.9 11.7 17.6 20.6 21.5 16.5 10.0 3.0 -1.5 8.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 6.9 21.8 38.4 0.0 0.0 0.0 0.0 67.1 HEATING DEG. DAYS(BASE 18 0C) 695.3 619.3 423.3 272.2 194.5 47.4 5.4 1.5 51.5 246.6 450.2 605.3 3612.6 DEWPOINT (MEAN C) -7.7 -6.6 -3.0 -2.2 -2.7 -2.4 3.0 -2.1 -1.6 -1.4 -3.5 -4.1 -2.9 MIXING RATIO (G/KG) 2.82 3.10 4.00 4.31 4.25 4.29 6.35 4.49 4.58 4.59 3.89 3.81 4.21 VAPOUR PRESSURE (HPA) 3.55 3.89 5.02 5.41 5.32 5.37 7.93 5.65 5.76 5.79 4.89 4.79 5.28 SATURATION DEF. (HPA) 0.97 0.85 3.63 6.48 9.79 17.21 17.75 21.86 14.10 6.97 3.09 0.98 8.64 RELATIVE HUMIDITY (MEAN %) 80 83 64 51 41 28 36 24 34 51 68 82 54 RELATIVE HUMIDITY (MAX. %) 88 91 82 72 64 48 57 42 56 72 87 91 71 RELATIVE HUMIDITY (MIN. %) 71 72 44 31 23 15 19 11 18 31 47 72 38 RELATIVE HUMIDITY (MEAN% 03UTC) 83 84 75 68 61 45 54 40 52 66 77 83 66 RELATIVE HUMIDITY (MEAN% 09UTC) 76 79 51 35 26 18 26 16 23 39 55 80 44 RELATIVE HUMIDITY (MEAN% 15UTC) 81 84 58 41 30 18 22 14 24 44 68 83 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 26.6 21.1 43.4 31.8 21.0 2.0 7.8 1.3 11.3 25.3 31.9 62.6 286.1 DAYS WITH PRECIPITATION >=10 0 0 1 1 1 0 0 0 0 1 1 2 7 DAYS WITH PRECIPITATION >= 5 1 0 4 3 1 0 0 0 0 3 3 5 20 DAYS WITH PRECIPITATION >= 1 9 9 7 7 1 1 4 1 5 4 8 13 69 DAYS WITH PRECIPITATION 10 12 8 9 7 1 5 2 5 6 8 14 87 GREATEST DAILY PRECIPITATION 7.1 4.4 17.0 11.0 19.0 2.0 2.0 1.0 4.0 13.0 10.0 12.3 19.0 DAY 26 21 9 8 2 16 17 11 21 1 12 19 DAY WITH THUNDER STORM 0 0 0 2 1 0 1 1 5 2 1 0 13 DAYS WITH SNOW OR SLEET 11 13 3 1 0 0 0 0 0 0 3 10 41 DAYS WITH DUST 0 0 0 4 0 0 0 0 0 0 0 0 4 WIND DIRECTION (PREVAILING) 270 225 270 225 225 270 135 270 270 270 225 225 270 PREVAILING WIND SPEED(KNOTS) 10.2 12.6 14.0 15.2 13.7 12.5 11.3 14.9 13.4 15.1 12.5 12.8 13.6 PREVAILING WIND PERCENT 19.8 25.4 28.2 28.3 33.5 19.2 15.7 25.0 34.6 29.0 23.8 31.5 21.5 CALMS PERCENT OF WIND 39.5 26.8 20.6 16.3 16.9 24.2 35.9 30.6 22.5 23.0 35.0 40.3 27.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 254 227 251 238 243 260 163 256 252 250 242 219 243 VECTOR WIND MAGNITUDE(KNOTS) 1.9 4.8 7.2 7.7 8.1 2.8 0.7 4.6 5.6 7.0 5.2 5.3 4.9 WIND STEADINESES (MEAN %) 31.7 50.5 70.6 70.0 76.4 30.8 9.9 50.5 58.3 65.4 62.7 72.6 54.4 WIND SPEED (MEAN KNOTS) 6.0 9.5 10.2 11.0 10.6 9.1 7.1 9.1 9.6 10.7 8.3 7.3 9.0 FASTEST WIND DIRECTION 80 250 270 210 290 270 150 320 260 240 290 230 250 FASTEST WIND SPEED (KNOTS) 25 43 35 41 39 27 33 43 29 39 39 33 43 DAY 26 24 17 15 29 22 20 8 8 16 19 30 DAYS WITH SKY CLEAR (0-2)/8 12 10 14 10 19 28 24 27 23 17 13 7 204 DAYS WITH P.CLOUDY (3-6)/8 9 11 11 16 9 2 7 4 7 12 13 13 114 DAYS WITH CLOUDY (7-8)/8 10 7 6 4 3 0 0 0 0 2 4 11 47 DAYS WITH VISIBILITY =< 2 KM 7 8 6 2 0 0 0 0 0 0 5 13 41 DURATION OF SUNSHINE HOURS 169.7 173.7 248.1 261.8 333.9 392.8 360.8 361.8 308.4 270.9 188.9 133.5 3204.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 786.5 784.4 785.7 786.5 785.4 785.2 785.3 787.8 788.9 789.7 787.8 787.5 786.7 MAX. QFE PRESSURE IN HPA 790.8 791.6 793.7 794.9 790.2 791.2 790.6 791.9 793.7 796.1 794.2 793.6 796.1 DAY-HOUR 9-18 28-18 1- 9 1- 6 14-18 2- 6 28- 9 5- 9 23- 6 10- 6 2- 6 9-18 MIN. QFE PRESSURE IN HPA 781.0 769.3 773.2 781.3 778.7 779.0 779.6 782.8 785.0 784.0 771.8 779.0 769.3 DAY-HOUR 26- 0 21- 3 25- 3 12- 9 9- 0 17-12 17-12 29-12 5-12 25-15 18- 9 4-21 MEAN QNH PRESSURE IN HPA 1019.8 1017.2 1018.8 1019.8 1018.4 1018.2 1018.4 1021.4 1022.8 1023.7 1021.4 1021.0 1020.1 MAX. QNH PRESSURE IN HPA 1025.1 1026.1 1028.7 1030.2 1024.4 1025.6 1024.9 1026.5 1028.7 1031.6 1029.3 1028.6 1031.6 DAY-HOUR 9-18 28-18 1- 9 1- 6 14-18 2- 6 28- 9 5- 9 23- 6 10- 6 2- 6 9-18 MIN. QNH PRESSURE IN HPA 1013.0 998.6 1003.4 1013.4 1010.2 1010.5 1011.3 1015.2 1017.9 1016.7 1001.6 1010.5 998.6 DAY-HOUR 26- 0 21- 3 25- 3 12- 9 9- 0 17-12 17-12 29-12 5-12 25-15 18- 9 4-21 MEAN QFF PRESSURE IN HPA 1025.1 1021.6 1015.6 1012.4 1007.9 1002.6 1000.6 1003.1 1008.7 1015.4 1019.6 1023.0 1013.0 MAX. QFF PRESSURE IN HPA 1036.6 1033.0 1029.1 1022.4 1015.0 1013.1 1008.7 1010.9 1017.9 1023.4 1034.3 1038.2 1038.2 DAY-HOUR 28-18 13- 6 1-15 1-18 5-15 1-21 22- 0 12- 0 23- 6 27-18 20- 3 22- 6 MIN. QFF PRESSURE IN HPA 1017.6 1000.3 1000.0 1004.3 996.3 994.7 993.2 997.1 1001.7 1004.9 1000.4 1010.4 993.2 DAY-HOUR 18-12 21- 3 24-21 25-21 29-12 17-21 9-12 29-12 5-21 26- 0 18- 9 20- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 786.3 784.0 785.4 786.4 785.3 785.1 785.4 787.8 788.8 789.5 787.7 787.4 786.6 MAX. QFE PRESSURE IN HPA 790.0 789.7 791.6 794.1 789.3 790.1 789.5 790.7 792.2 795.2 793.4 793.0 795.2 DAY 10 9 1 2 14 2 28 5 23 10 15 10 MIN. QFE PRESSURE IN HPA 781.0 771.0 773.9 781.7 778.7 779.5 781.0 783.9 785.9 784.1 775.2 779.0 771.0 DAY 26 21 25 12 9 18 18 27 6 26 18 5 MEAN QNH PRESSURE IN HPA 1019.6 1016.7 1018.4 1019.6 1018.3 1018.1 1018.4 1021.4 1022.7 1023.5 1021.2 1020.9 1019.9 MAX. QNH PRESSURE IN HPA 1024.1 1023.8 1026.1 1029.2 1023.3 1024.2 1023.5 1025.0 1026.8 1030.5 1028.3 1027.8 1030.5 DAY 10 9 1 2 14 2 28 5 23 10 15 10 MIN. QNH PRESSURE IN HPA 1013.0 1000.7 1004.2 1013.9 1010.2 1011.2 1013.0 1016.6 1019.1 1016.8 1005.9 1010.5 1000.7 DAY 26 21 25 12 9 18 18 27 6 26 18 5 MEAN QFF PRESSURE IN HPA 1024.1 1020.5 1015.0 1011.8 1007.7 1002.6 1000.6 1002.6 1008.0 1014.5 1018.8 1022.2 1012.4 MAX. QFF PRESSURE IN HPA 1034.0 1029.3 1025.9 1020.4 1012.4 1012.9 1008.7 1010.9 1015.8 1020.4 1031.8 1032.1 1034.0 DAY 28 13 1 2 6 2 22 12 23 2 20 22 MIN. QFF PRESSURE IN HPA 1017.7 1002.1 1000.2 1005.9 997.0 995.6 995.1 998.3 1002.2 1004.9 1004.0 1010.4 995.1 DAY 18 21 25 12 30 18 11 30 6 26 18 20 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 786.1 784.0 785.4 786.5 785.4 785.4 785.6 788.1 788.9 789.6 787.6 787.2 786.6 MAX. QFE PRESSURE IN HPA 789.3 789.9 792.3 793.8 789.3 790.6 789.8 791.1 792.2 795.2 793.2 792.0 795.2 DAY 10 12 1 2 14 2 29 5 23 10 2 9 MIN. QFE PRESSURE IN HPA 781.0 769.3 773.2 781.5 779.0 780.0 781.0 783.9 786.0 784.5 772.7 779.0 769.3 DAY 26 21 25 9 9 17 18 27 5 26 18 5 MEAN QNH PRESSURE IN HPA 1019.3 1016.7 1018.5 1019.7 1018.4 1018.4 1018.7 1021.7 1022.8 1023.6 1021.1 1020.6 1020.0 MAX. QNH PRESSURE IN HPA 1023.3 1024.0 1027.0 1028.8 1023.3 1024.9 1023.9 1025.5 1026.8 1030.5 1028.1 1026.6 1030.5 DAY 10 12 1 2 14 2 29 5 23 10 2 9 MIN. QNH PRESSURE IN HPA 1013.0 998.6 1003.4 1013.6 1010.5 1011.8 1013.0 1016.6 1019.2 1017.3 1002.8 1010.5 998.6 DAY 26 21 25 9 9 17 18 27 5 26 18 5 MEAN QFF PRESSURE IN HPA 1025.3 1022.0 1016.3 1013.2 1008.4 1003.1 1001.0 1004.1 1009.9 1016.5 1020.4 1023.3 1013.6 MAX. QFF PRESSURE IN HPA 1036.0 1032.7 1028.3 1021.0 1013.9 1012.0 1008.3 1010.7 1016.9 1022.6 1034.3 1035.1 1036.0 DAY 28 13 1 2 6 2 22 12 22 2 20 22 MIN. QFF PRESSURE IN HPA 1018.6 1000.3 1001.0 1005.9 998.5 997.5 995.6 999.9 1003.7 1007.1 1001.6 1010.4 995.6 DAY 18 21 25 26 30 6 9 2 5 26 18 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 786.9 784.8 786.2 787.1 785.8 785.7 786.0 788.7 789.7 790.4 788.4 788.0 787.3 MAX. QFE PRESSURE IN HPA 790.2 790.9 793.3 794.9 790.1 791.2 790.6 791.6 793.7 796.1 794.2 792.9 796.1 DAY 9 12 1 1 14 2 29 5 23 10 2 9 MIN. QFE PRESSURE IN HPA 782.3 770.1 773.8 781.5 779.4 780.3 781.3 784.2 786.7 786.4 772.9 780.3 770.1 DAY 26 21 25 12 9 17 18 27 6 26 18 5 MEAN QNH PRESSURE IN HPA 1020.3 1017.7 1019.5 1020.6 1018.9 1018.9 1019.2 1022.5 1023.7 1024.6 1022.2 1021.6 1020.8 MAX. QNH PRESSURE IN HPA 1024.4 1025.2 1028.2 1030.2 1024.2 1025.6 1024.9 1026.1 1028.7 1031.6 1029.3 1027.7 1031.6 DAY 9 12 1 1 14 2 29 5 23 10 2 9 MIN. QNH PRESSURE IN HPA 1014.6 999.5 1004.1 1013.6 1011.0 1012.1 1013.4 1017.0 1020.0 1019.7 1003.0 1012.1 999.5 DAY 26 21 25 12 9 17 18 27 6 26 18 5 MEAN QFF PRESSURE IN HPA 1026.5 1023.1 1016.5 1013.3 1008.4 1003.1 1001.3 1003.9 1009.4 1016.3 1020.6 1024.3 1013.9 MAX. QFF PRESSURE IN HPA 1035.5 1033.0 1028.5 1022.3 1013.3 1011.9 1006.8 1010.6 1017.9 1022.6 1034.2 1038.2 1038.2 DAY 28 13 11 2 18 2 21 12 23 28 20 22 MIN. QFF PRESSURE IN HPA 1019.5 1003.3 1000.2 1005.4 999.4 996.6 997.2 1000.1 1003.5 1007.9 1001.1 1012.5 996.6 DAY 4 21 25 26 29 17 9 24 5 6 18 20 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 786.9 784.7 786.1 786.7 785.6 785.4 785.7 788.2 789.2 789.9 787.9 787.7 787.0 MAX. QFE PRESSURE IN HPA 790.2 791.1 793.7 794.9 790.1 790.8 790.6 791.9 792.7 795.9 794.2 792.8 795.9 DAY 9 12 1 1 14 2 28 5 23 9 14 9 MIN. QFE PRESSURE IN HPA 782.1 770.3 774.4 781.3 779.8 779.8 781.3 784.3 785.9 785.7 771.8 780.4 770.3 DAY 19 21 25 12 9 17 18 27 5 25 18 5 MEAN QNH PRESSURE IN HPA 1020.3 1017.6 1019.3 1020.1 1018.6 1018.4 1018.8 1021.9 1023.2 1024.0 1021.6 1021.3 1020.4 MAX. QNH PRESSURE IN HPA 1024.4 1025.5 1028.7 1030.2 1024.2 1025.1 1024.9 1026.5 1027.5 1031.4 1029.3 1027.6 1031.4 DAY 9 12 1 1 14 2 28 5 23 9 14 9 MIN. QNH PRESSURE IN HPA 1014.4 999.8 1004.9 1013.4 1011.5 1011.5 1013.4 1017.1 1019.1 1018.8 1001.6 1012.3 999.8 DAY 19 21 25 12 9 17 18 27 5 25 18 5 MEAN QFF PRESSURE IN HPA 1024.7 1021.3 1015.7 1012.1 1007.7 1002.6 1000.8 1003.1 1008.5 1015.1 1019.1 1022.5 1012.7 MAX. QFF PRESSURE IN HPA 1032.5 1029.3 1027.7 1020.8 1012.5 1012.3 1005.6 1009.1 1015.3 1022.1 1032.6 1035.7 1035.7 DAY 28 12 1 1 14 2 21 12 22 27 20 22 MIN. QFF PRESSURE IN HPA 1019.0 1003.5 1001.4 1005.7 996.9 996.3 995.3 997.8 1002.5 1008.7 1000.4 1013.2 995.3 DAY 18 21 25 26 29 26 9 29 5 6 18 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 786.2 784.0 785.2 786.0 784.9 784.6 784.7 787.1 788.2 789.1 787.4 787.0 786.2 MAX. QFE PRESSURE IN HPA 790.0 790.4 792.8 794.0 789.8 790.1 789.3 790.4 792.1 795.0 793.6 792.7 795.0 DAY 9 28 1 1 14 3 29 5 24 9 14 9 MIN. QFE PRESSURE IN HPA 781.2 770.5 773.4 781.5 779.3 779.0 779.6 782.8 785.0 784.4 771.9 780.2 770.5 DAY 19 21 25 9 9 17 17 29 5 25 18 5 MEAN QNH PRESSURE IN HPA 1019.4 1016.7 1018.2 1019.2 1017.8 1017.4 1017.6 1020.6 1021.9 1023.0 1020.9 1020.4 1019.4 MAX. QNH PRESSURE IN HPA 1024.1 1024.6 1027.6 1029.1 1023.9 1024.2 1023.3 1024.6 1026.7 1030.3 1028.6 1027.5 1030.3 DAY 9 28 1 1 14 3 29 5 24 9 14 9 MIN. QNH PRESSURE IN HPA 1013.3 1000.0 1003.6 1013.6 1010.9 1010.5 1011.3 1015.2 1017.9 1017.2 1001.8 1012.0 1000.0 DAY 19 21 25 9 9 17 17 29 5 25 18 5 MEAN QFF PRESSURE IN HPA 1023.8 1020.3 1014.6 1011.4 1007.3 1001.9 999.9 1002.0 1007.4 1014.2 1018.5 1021.5 1011.9 MAX. QFF PRESSURE IN HPA 1031.8 1028.0 1027.6 1019.8 1012.3 1011.1 1008.4 1008.3 1013.8 1019.8 1029.1 1031.4 1031.8 DAY 27 12 1 1 14 1 20 11 24 9 20 22 MIN. QFF PRESSURE IN HPA 1017.6 1005.2 1000.5 1005.9 996.3 996.0 993.2 997.1 1002.0 1008.2 1003.6 1013.3 993.2 DAY 18 21 25 26 29 28 9 29 4 25 18 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 786.4 784.3 785.3 786.1 784.9 784.6 784.4 787.1 788.4 789.3 787.8 787.4 786.3 MAX. QFE PRESSURE IN HPA 790.3 790.7 792.8 794.3 789.5 789.4 788.6 790.4 791.9 795.0 793.6 793.1 795.0 DAY 9 28 1 1 13 1 29 5 24 9 14 9 MIN. QFE PRESSURE IN HPA 782.0 772.4 774.2 781.6 778.8 779.0 779.6 783.2 785.3 784.0 774.1 780.6 772.4 DAY 19 21 25 12 29 17 17 29 5 25 18 4 MEAN QNH PRESSURE IN HPA 1019.7 1017.1 1018.3 1019.3 1017.8 1017.4 1017.2 1020.5 1022.1 1023.3 1021.4 1020.9 1019.6 MAX. QNH PRESSURE IN HPA 1024.5 1025.0 1027.6 1029.4 1023.5 1023.4 1022.4 1024.6 1026.5 1030.3 1028.6 1027.9 1030.3 DAY 9 28 1 1 13 1 29 5 24 9 14 9 MIN. QNH PRESSURE IN HPA 1014.2 1002.4 1004.6 1013.8 1010.3 1010.5 1011.3 1015.7 1018.3 1016.7 1004.5 1012.5 1002.4 DAY 19 21 25 12 29 17 17 29 5 25 18 4 MEAN QFF PRESSURE IN HPA 1025.7 1022.2 1016.0 1012.6 1007.9 1002.1 999.7 1003.1 1009.4 1016.3 1020.7 1023.5 1013.3 MAX. QFF PRESSURE IN HPA 1035.6 1031.0 1029.1 1021.1 1015.0 1010.5 1008.1 1008.6 1015.7 1021.7 1033.2 1037.8 1037.8 DAY 28 12 1 1 5 1 21 11 22 27 20 21 MIN. QFF PRESSURE IN HPA 1019.7 1009.0 1002.7 1007.8 997.5 996.4 994.7 999.3 1003.6 1007.8 1007.2 1011.9 994.7 DAY 18 21 25 25 29 24 10 2 5 25 18 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 786.8 784.7 786.0 786.9 785.6 785.4 785.4 787.9 789.1 789.9 788.1 787.8 786.9 MAX. QFE PRESSURE IN HPA 790.8 791.6 792.8 794.8 790.2 790.1 788.9 790.6 792.7 795.2 794.2 793.6 795.2 DAY 9 28 1 1 14 1 27 5 23 9 14 9 MIN. QFE PRESSURE IN HPA 781.8 773.4 775.3 782.7 780.3 779.7 781.6 784.8 785.9 784.6 775.9 779.3 773.4 DAY 25 21 25 9 8 17 17 29 5 25 18 4 MEAN QNH PRESSURE IN HPA 1020.1 1017.5 1019.1 1020.2 1018.7 1018.5 1018.4 1021.5 1023.0 1024.0 1021.7 1021.4 1020.4 MAX. QNH PRESSURE IN HPA 1025.1 1026.1 1027.6 1030.0 1024.4 1024.2 1022.8 1024.9 1027.5 1030.5 1029.3 1028.6 1030.5 DAY 9 28 1 1 14 1 27 5 23 9 14 9 MIN. QNH PRESSURE IN HPA 1014.0 1003.6 1006.0 1015.1 1012.1 1011.4 1013.8 1017.7 1019.1 1017.5 1006.7 1010.9 1003.6 DAY 25 21 25 9 8 17 17 29 5 25 18 4 MEAN QFF PRESSURE IN HPA 1026.3 1022.8 1016.0 1013.0 1008.2 1002.7 1000.6 1003.2 1008.8 1015.8 1020.2 1024.1 1013.5 MAX. QFF PRESSURE IN HPA 1036.6 1031.2 1027.9 1022.4 1013.4 1012.3 1006.3 1008.9 1017.7 1023.4 1033.9 1037.1 1037.1 DAY 28 12 11 1 13 1 21 11 23 27 19 21 MIN. QFF PRESSURE IN HPA 1020.4 1008.0 1000.5 1005.1 997.6 995.6 996.6 999.6 1002.7 1006.7 1004.8 1011.3 995.6 DAY 18 20 24 25 29 17 10 29 5 25 17 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 786.6 784.5 785.9 786.7 785.6 785.5 785.7 788.0 789.0 789.8 787.9 787.6 786.9 MAX. QFE PRESSURE IN HPA 790.0 791.6 791.9 794.8 789.8 790.1 789.5 791.1 792.4 795.4 794.0 793.0 795.4 DAY 9 28 1 1 13 1 27 5 22 9 14 9 MIN. QFE PRESSURE IN HPA 781.4 773.1 775.4 782.5 779.7 779.5 781.6 784.5 785.9 784.4 775.6 779.0 773.1 DAY 25 20 24 25 8 17 17 26 5 25 17 4 MEAN QNH PRESSURE IN HPA 1019.9 1017.4 1019.0 1020.1 1018.6 1018.5 1018.8 1021.6 1022.9 1023.9 1021.5 1021.1 1020.3 MAX. QNH PRESSURE IN HPA 1024.1 1026.1 1026.5 1030.0 1023.9 1024.2 1023.5 1025.5 1027.1 1030.8 1029.1 1027.8 1030.8 DAY 9 28 1 1 13 1 27 5 22 9 14 9 MIN. QNH PRESSURE IN HPA 1013.5 1003.3 1006.1 1014.9 1011.4 1011.2 1013.8 1017.3 1019.1 1017.2 1006.3 1010.5 1003.3 DAY 25 20 24 25 8 17 17 26 5 25 17 4 MEAN QFF PRESSURE IN HPA 1024.5 1021.0 1015.2 1012.0 1007.5 1002.6 1000.8 1002.8 1008.2 1015.1 1019.0 1022.4 1012.6 MAX. QFF PRESSURE IN HPA 1034.2 1028.6 1026.4 1021.2 1012.7 1013.1 1006.0 1009.1 1014.7 1021.4 1033.2 1034.5 1034.5 DAY 27 12 11 1 5 1 20 11 22 27 19 21 MIN. QFF PRESSURE IN HPA 1019.0 1003.8 1000.0 1004.3 996.5 994.7 995.3 998.8 1001.7 1005.5 1003.4 1010.6 994.7 DAY 17 20 24 25 29 17 10 29 5 25 17 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -6.1 -2.5 3.0 5.9 11.6 17.1 20.8 20.4 17.8 12.7 3.4 -4.8 8.3 MINIMUN AIR TEMPERATURE (C) -10.7 -6.8 -2.2 1.5 4.2 7.9 12.8 10.7 7.8 5.9 -0.9 -8.5 1.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 27 23 10 0 0 0 0 0 0 0 3 22 85 DAYS WITH FREEZING MIN.<= 0 29 28 24 12 1 0 0 0 1 0 21 30 146 TEMPERATURE RECORDS LOWEST(C) -17.0 -12.6 -12.0 -2.0 0.0 3.0 9.0 7.0 -2.4 1.6 -6.8 -21.0 -21.0 DAY 19 5 1 1 8 3 1 23 10 31 30 14 MAXIMUM AIR TEMPERATURE (C) -0.3 2.9 8.9 11.3 18.5 24.3 28.4 29.4 26.7 19.9 8.8 -1.2 14.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 8 12 2 0 0 0 22 DAYS WITH MAXIMUM TEMP. <= 0 18 6 0 0 0 0 0 0 0 0 1 20 45 TEMPERATURE RECORDS HIGHEST(C) 5.8 7.0 16.8 19.6 24.6 28.8 30.6 32.6 31.0 25.6 15.2 5.8 32.6 DAY 26 6 13 28 28 27 19 11 3 1 10 7 DIF. BETWEEN (MAX.-MIN.) (C) 10.4 9.7 11.1 9.8 14.3 16.4 15.6 18.7 18.9 14.0 9.7 7.3 13.0 MEAN DAILY TEMP. (MDT) (C) -5.5 -2.0 3.3 6.4 11.3 16.1 20.6 20.1 17.2 12.9 3.9 -4.8 8.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.0 16.2 9.9 0.0 0.0 0.0 0.0 26.1 HEATING DEG. DAYS(BASE 18 0C) 729.3 558.8 454.7 347.7 207.0 68.1 1.3 1.7 31.5 158.6 421.7 707.7 3688.1 DEWPOINT (MEAN C) -9.8 -7.2 -4.9 -0.0 -0.5 -1.4 3.1 -0.2 -5.4 -2.3 -3.4 -7.2 -3.3 MIXING RATIO (G/KG) 2.55 2.98 3.56 4.99 4.82 4.52 6.35 5.19 3.41 4.29 3.91 3.05 4.14 VAPOUR PRESSURE (HPA) 3.20 3.74 4.46 6.23 6.03 5.67 7.95 6.50 4.31 5.41 4.93 3.83 5.19 SATURATION DEF. (HPA) 0.90 1.53 3.48 3.38 8.41 14.80 17.68 18.87 17.30 10.12 3.20 0.66 8.36 RELATIVE HUMIDITY (MEAN %) 77 72 62 70 49 31 35 30 23 41 66 84 53 RELATIVE HUMIDITY (MAX. %) 87 85 78 87 72 50 56 52 37 60 83 91 70 RELATIVE HUMIDITY (MIN. %) 66 59 42 50 27 18 18 13 12 23 46 74 37 RELATIVE HUMIDITY (MEAN% 03UTC) 79 76 72 81 68 48 54 50 36 55 78 86 65 RELATIVE HUMIDITY (MEAN% 09UTC) 71 64 48 57 33 21 24 20 14 26 53 83 43 RELATIVE HUMIDITY (MEAN% 15UTC) 78 73 59 65 35 21 22 15 16 38 63 84 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 63.9 15.7 63.6 56.1 20.9 0.0 22.2 0.0 0.0 25.2 34.2 119.3 421.1 DAYS WITH PRECIPITATION >=10 1 0 2 1 0 0 1 0 0 0 1 4 10 DAYS WITH PRECIPITATION >= 5 5 1 4 5 2 0 1 0 0 3 2 5 28 DAYS WITH PRECIPITATION >= 1 9 6 9 10 7 0 3 0 0 5 7 15 71 DAYS WITH PRECIPITATION 13 8 11 21 9 0 4 0 0 7 12 16 101 GREATEST DAILY PRECIPITATION 22.0 5.1 18.0 21.0 6.0 0.0 18.0 0.0 0.0 7.0 14.0 37.0 37.0 DAY 7 14 17 2 9 ** 22 ** ** 30 25 9 DAY WITH THUNDER STORM 0 0 0 1 2 0 3 0 0 1 0 0 7 DAYS WITH SNOW OR SLEET 11 7 7 7 0 0 0 0 0 0 7 15 54 DAYS WITH DUST 0 1 0 1 0 0 0 0 0 1 0 0 3 WIND DIRECTION (PREVAILING) 225 225 225 225 225 225 315 270 270 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 13.9 12.6 14.5 16.6 15.2 15.5 13.0 14.0 13.6 13.8 13.1 12.2 13.9 PREVAILING WIND PERCENT 19.4 25.9 32.3 41.3 29.0 28.8 19.0 24.2 31.7 26.6 15.0 24.6 24.6 CALMS PERCENT OF WIND 43.5 26.8 15.3 10.8 16.1 13.8 14.1 20.2 15.8 16.1 37.5 30.6 21.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 246 254 242 235 250 248 273 248 250 247 249 231 246 VECTOR WIND MAGNITUDE(KNOTS) 4.7 7.1 7.8 11.8 8.3 6.8 3.0 5.4 6.3 6.8 2.9 5.4 6.3 WIND STEADINESES (MEAN %) 58.0 63.4 65.0 79.7 70.3 54.8 29.1 56.2 61.8 62.4 40.3 60.7 59.4 WIND SPEED (MEAN KNOTS) 8.1 11.2 12.0 14.8 11.8 12.4 10.3 9.6 10.2 10.9 7.2 8.9 10.6 FASTEST WIND DIRECTION 270 280 300 210 240 250 320 270 240 210 260 190 210 FASTEST WIND SPEED (KNOTS) 39 43 43 47 43 39 29 29 35 39 31 43 47 DAY 31 16 9 25 24 1 22 4 21 3 10 20 DAYS WITH SKY CLEAR (0-2)/8 13 12 14 5 16 26 28 31 29 14 13 6 207 DAYS WITH P.CLOUDY (3-6)/8 8 9 10 9 12 4 3 0 1 15 8 10 89 DAYS WITH CLOUDY (7-8)/8 10 7 7 16 3 0 0 0 0 2 9 15 69 DAYS WITH VISIBILITY =< 2 KM 6 3 4 3 1 0 0 0 0 0 5 14 36 DURATION OF SUNSHINE HOURS 169.0 216.7 237.4 192.9 347.0 382.3 367.2 385.9 330.2 244.0 185.5 119.1 3177.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 785.1 786.5 785.2 783.5 785.7 786.1 786.8 786.1 790.2 790.9 790.0 784.5 786.7 MAX. QFE PRESSURE IN HPA 793.5 795.6 794.7 790.0 790.8 791.4 790.6 790.3 794.3 796.7 797.0 793.9 797.0 DAY-HOUR 27- 6 6- 9 11- 6 1- 6 17- 6 24-18 29- 6 31- 6 29- 6 10- 6 18- 6 3- 6 MIN. QFE PRESSURE IN HPA 775.8 777.7 775.4 773.7 781.2 780.1 780.4 781.7 785.4 784.5 783.0 770.5 770.5 DAY-HOUR 8- 0 26-15 22-12 3-12 4- 9 20-15 24-12 7-12 10-12 21-12 25-12 21- 9 MEAN QNH PRESSURE IN HPA 1018.1 1019.8 1018.1 1016.2 1018.8 1019.3 1020.1 1019.3 1024.4 1025.3 1024.1 1017.3 1020.1 MAX. QNH PRESSURE IN HPA 1028.4 1031.0 1029.9 1024.1 1025.1 1025.9 1024.9 1024.5 1029.4 1032.4 1032.8 1028.9 1032.8 DAY-HOUR 27- 6 6- 9 11- 6 1- 6 17- 6 24-18 29- 6 31- 6 29- 6 10- 6 18- 6 3- 6 MIN. QNH PRESSURE IN HPA 1006.6 1008.9 1006.1 1004.0 1013.3 1011.9 1012.3 1013.9 1018.4 1017.3 1015.5 1000.0 1000.0 DAY-HOUR 8- 0 26-15 22-12 3-12 4- 9 20-15 24-12 7-12 10-12 21-12 25-12 21- 9 MEAN QFF PRESSURE IN HPA 1024.9 1023.1 1016.1 1011.2 1009.0 1004.8 1002.3 1001.9 1009.6 1014.6 1021.8 1022.7 1013.5 MAX. QFF PRESSURE IN HPA 1039.3 1037.0 1030.2 1022.4 1016.6 1012.5 1008.6 1010.5 1016.6 1020.5 1032.9 1041.1 1041.1 DAY-HOUR 27-15 4-18 11- 3 1- 6 17- 6 3-21 29- 6 31- 3 21- 3 10-15 18- 6 14-15 MIN. QFF PRESSURE IN HPA 1007.5 1007.9 1001.4 1002.9 1001.0 997.3 994.4 995.1 1002.2 1008.7 1009.1 1000.2 994.4 DAY-HOUR 7-15 25- 0 26-21 3- 9 19-21 18-12 24- 9 14-12 6- 0 14-12 12- 0 21- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 785.0 786.1 785.0 783.2 785.4 785.9 786.8 786.1 790.0 790.9 789.8 784.4 786.6 MAX. QFE PRESSURE IN HPA 792.1 794.9 794.0 788.3 789.6 790.6 790.2 789.1 793.0 795.9 796.0 792.9 796.0 DAY 27 6 12 1 17 25 29 30 21 11 18 3 MIN. QFE PRESSURE IN HPA 775.8 778.0 777.3 774.0 782.0 780.3 782.2 782.6 786.6 785.8 783.5 771.5 771.5 DAY 8 27 22 4 12 20 24 17 11 22 13 21 MEAN QNH PRESSURE IN HPA 1018.0 1019.3 1017.9 1015.8 1018.5 1019.1 1020.1 1019.3 1024.1 1025.2 1023.9 1017.3 1019.9 MAX. QNH PRESSURE IN HPA 1026.7 1030.2 1029.1 1022.0 1023.6 1024.9 1024.4 1023.0 1027.8 1031.4 1031.5 1027.7 1031.5 DAY 27 6 12 1 17 25 29 30 21 11 18 3 MIN. QNH PRESSURE IN HPA 1006.6 1009.3 1008.4 1004.4 1014.2 1012.1 1014.5 1015.0 1019.9 1018.9 1016.1 1001.3 1001.3 DAY 8 27 22 4 12 20 24 17 11 22 13 21 MEAN QFF PRESSURE IN HPA 1023.9 1022.0 1015.4 1010.4 1008.5 1004.9 1002.0 1001.4 1008.9 1013.9 1020.6 1022.3 1012.8 MAX. QFF PRESSURE IN HPA 1033.8 1033.7 1028.2 1021.2 1014.6 1011.7 1008.1 1008.2 1013.7 1018.5 1029.9 1036.2 1036.2 DAY 27 6 11 1 17 4 30 31 21 31 18 14 MIN. QFF PRESSURE IN HPA 1009.6 1007.9 1002.9 1004.0 1001.5 998.0 995.9 996.5 1002.2 1009.9 1009.1 1001.5 995.9 DAY 8 25 27 4 20 20 24 15 6 14 12 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 784.8 786.2 785.0 783.2 785.7 786.2 787.0 786.3 790.2 790.9 789.8 784.1 786.6 MAX. QFE PRESSURE IN HPA 792.1 794.9 794.0 788.8 790.0 790.9 790.3 789.8 793.2 796.1 795.9 792.8 796.1 DAY 27 6 11 1 17 25 29 31 29 11 18 3 MIN. QFE PRESSURE IN HPA 776.1 778.0 775.7 774.9 781.5 780.2 781.8 782.8 786.8 786.1 783.5 770.6 770.6 DAY 8 25 22 3 12 20 24 17 11 30 13 21 MEAN QNH PRESSURE IN HPA 1017.7 1019.5 1017.9 1015.8 1018.8 1019.4 1020.5 1019.6 1024.3 1025.2 1023.9 1016.8 1019.9 MAX. QNH PRESSURE IN HPA 1026.7 1030.2 1029.1 1022.6 1024.1 1025.2 1024.5 1023.9 1028.1 1031.6 1031.4 1027.6 1031.6 DAY 27 6 11 1 17 25 29 31 29 11 18 3 MIN. QNH PRESSURE IN HPA 1007.0 1009.3 1006.5 1005.5 1013.6 1012.0 1014.0 1015.2 1020.2 1019.3 1016.1 1000.2 1000.2 DAY 8 25 22 3 12 20 24 17 11 30 13 21 MEAN QFF PRESSURE IN HPA 1025.4 1023.7 1016.9 1011.6 1009.4 1005.0 1003.0 1003.1 1011.1 1016.2 1022.5 1022.7 1014.2 MAX. QFF PRESSURE IN HPA 1037.4 1036.4 1030.2 1022.1 1015.1 1011.3 1008.5 1010.5 1016.6 1020.4 1031.7 1039.9 1039.9 DAY 25 6 11 1 17 4 29 31 21 10 18 14 MIN. QFF PRESSURE IN HPA 1010.7 1007.9 1004.7 1003.9 1003.5 997.4 996.1 997.6 1006.3 1012.3 1010.4 1000.2 996.1 DAY 7 25 27 3 20 20 24 15 6 1 12 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 785.6 787.0 785.7 783.8 786.2 786.6 787.5 786.9 790.9 791.6 790.6 785.0 787.3 MAX. QFE PRESSURE IN HPA 793.5 795.3 794.7 790.0 790.8 791.4 790.6 790.3 794.3 796.7 797.0 793.9 797.0 DAY 27 6 11 1 17 25 29 31 29 10 18 3 MIN. QFE PRESSURE IN HPA 777.7 779.2 776.1 774.9 781.9 780.3 781.6 783.2 787.1 786.9 784.5 771.2 771.2 DAY 8 25 22 3 4 20 24 17 10 21 13 21 MEAN QNH PRESSURE IN HPA 1018.7 1020.5 1018.8 1016.5 1019.4 1019.9 1021.0 1020.2 1025.2 1026.1 1024.9 1018.0 1020.8 MAX. QNH PRESSURE IN HPA 1028.4 1030.7 1029.9 1024.1 1025.1 1025.9 1024.9 1024.5 1029.4 1032.4 1032.8 1028.9 1032.8 DAY 27 6 11 1 17 25 29 31 29 10 18 3 MIN. QNH PRESSURE IN HPA 1008.9 1010.8 1007.0 1005.5 1014.1 1012.1 1013.8 1015.7 1020.5 1020.3 1017.3 1000.9 1000.9 DAY 8 25 22 3 4 20 24 17 10 21 13 21 MEAN QFF PRESSURE IN HPA 1025.9 1024.6 1017.1 1011.8 1009.7 1005.2 1003.1 1002.5 1009.9 1015.1 1023.0 1023.8 1014.3 MAX. QFF PRESSURE IN HPA 1037.8 1036.2 1029.9 1022.4 1016.6 1011.8 1008.6 1009.8 1016.0 1019.3 1032.9 1038.6 1038.6 DAY 27 6 11 1 17 8 29 31 21 7 18 14 MIN. QFF PRESSURE IN HPA 1011.8 1010.1 1005.2 1003.2 1003.5 997.5 995.1 996.7 1004.7 1010.8 1011.2 1001.8 995.1 DAY 7 25 28 3 29 19 24 15 4 14 12 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 785.4 787.1 785.5 783.7 785.9 786.3 787.0 786.3 790.5 791.1 790.2 784.6 787.0 MAX. QFE PRESSURE IN HPA 793.3 795.6 794.7 789.9 790.3 790.9 790.3 789.6 794.0 796.3 796.6 793.3 796.6 DAY 27 6 11 1 17 24 29 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 777.3 780.3 776.0 774.6 781.2 780.3 780.8 782.3 786.7 785.5 783.9 770.5 770.5 DAY 8 25 22 3 4 20 24 17 10 21 25 21 MEAN QNH PRESSURE IN HPA 1018.5 1020.5 1018.6 1016.3 1019.0 1019.6 1020.4 1019.6 1024.7 1025.5 1024.4 1017.4 1020.4 MAX. QNH PRESSURE IN HPA 1028.2 1031.0 1029.9 1024.0 1024.5 1025.2 1024.5 1023.6 1029.1 1031.9 1032.3 1028.2 1032.3 DAY 27 6 11 1 17 24 29 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1008.4 1012.1 1006.8 1005.1 1013.3 1012.1 1012.8 1014.6 1020.0 1018.6 1016.6 1000.0 1000.0 DAY 8 25 22 3 4 20 24 17 10 21 25 21 MEAN QFF PRESSURE IN HPA 1024.3 1022.9 1015.9 1011.0 1008.8 1004.8 1002.4 1001.7 1009.3 1013.8 1021.4 1022.2 1013.2 MAX. QFF PRESSURE IN HPA 1034.9 1033.5 1028.5 1019.8 1015.8 1010.8 1008.4 1008.8 1014.6 1018.6 1029.9 1036.4 1036.4 DAY 27 6 11 1 17 24 29 30 21 27 17 14 MIN. QFF PRESSURE IN HPA 1009.9 1011.2 1003.9 1002.9 1002.3 997.7 994.4 995.4 1004.6 1009.2 1012.7 1001.2 994.4 DAY 7 25 28 3 24 19 24 15 6 1 13 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 784.7 786.1 784.7 783.2 785.3 785.6 786.0 785.3 789.5 790.3 789.4 783.9 786.2 MAX. QFE PRESSURE IN HPA 792.3 794.2 793.2 788.9 789.3 790.2 789.5 788.3 793.8 795.2 796.1 792.5 796.1 DAY 27 6 11 1 17 24 29 29 21 10 18 3 MIN. QFE PRESSURE IN HPA 777.5 778.8 775.4 773.7 781.3 780.3 780.4 781.7 785.4 784.5 783.0 770.6 770.6 DAY 7 26 22 3 4 20 24 7 10 21 25 21 MEAN QNH PRESSURE IN HPA 1017.6 1019.3 1017.6 1015.7 1018.3 1018.7 1019.2 1018.3 1023.6 1024.4 1023.3 1016.6 1019.4 MAX. QNH PRESSURE IN HPA 1027.0 1029.3 1028.1 1022.8 1023.3 1024.4 1023.5 1022.0 1028.8 1030.5 1031.6 1027.2 1031.6 DAY 27 6 11 1 17 24 29 29 21 10 18 3 MIN. QNH PRESSURE IN HPA 1008.7 1010.3 1006.1 1004.0 1013.4 1012.1 1012.3 1013.9 1018.4 1017.3 1015.5 1000.2 1000.2 DAY 7 26 22 3 4 20 24 7 10 21 25 21 MEAN QFF PRESSURE IN HPA 1023.6 1021.8 1014.9 1010.1 1008.3 1004.5 1001.2 1000.7 1008.3 1013.3 1020.3 1021.6 1012.4 MAX. QFF PRESSURE IN HPA 1035.9 1033.2 1027.5 1019.7 1013.9 1009.9 1006.8 1007.3 1015.2 1017.4 1028.7 1038.5 1038.5 DAY 27 4 10 1 16 24 29 29 21 27 18 14 MIN. QFF PRESSURE IN HPA 1008.3 1009.4 1004.4 1003.1 1002.1 997.3 994.4 995.1 1003.1 1008.7 1011.3 1001.9 994.4 DAY 7 26 20 3 20 18 24 14 6 14 12 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 785.1 786.2 784.8 783.4 785.3 785.4 785.8 785.4 789.7 790.7 789.8 784.4 786.3 MAX. QFE PRESSURE IN HPA 792.4 793.7 793.1 788.9 789.5 790.0 788.9 788.5 793.1 795.7 796.0 792.2 796.0 DAY 25 6 11 1 17 24 29 29 23 10 18 3 MIN. QFE PRESSURE IN HPA 776.8 777.7 776.4 774.5 782.2 780.1 781.3 781.9 786.0 785.5 783.3 772.0 772.0 DAY 7 26 22 3 4 20 24 16 10 21 25 21 MEAN QNH PRESSURE IN HPA 1018.0 1019.4 1017.7 1016.0 1018.3 1018.5 1019.0 1018.4 1023.7 1025.0 1023.8 1017.2 1019.6 MAX. QNH PRESSURE IN HPA 1027.1 1028.7 1027.9 1022.8 1023.5 1024.1 1022.8 1022.3 1027.9 1031.2 1031.5 1026.8 1031.5 DAY 25 6 11 1 17 24 29 29 23 10 18 3 MIN. QNH PRESSURE IN HPA 1007.8 1008.9 1007.3 1005.0 1014.5 1011.9 1013.4 1014.1 1019.2 1018.6 1015.9 1001.9 1001.9 DAY 7 26 22 3 4 20 24 16 10 21 25 21 MEAN QFF PRESSURE IN HPA 1026.0 1023.5 1016.6 1011.7 1008.8 1004.2 1001.6 1002.1 1010.6 1016.2 1022.5 1023.2 1013.9 MAX. QFF PRESSURE IN HPA 1039.3 1036.9 1029.5 1019.8 1014.1 1010.6 1006.7 1009.0 1016.4 1020.5 1031.5 1041.1 1041.1 DAY 27 4 10 1 16 7 29 30 21 10 17 14 MIN. QFF PRESSURE IN HPA 1007.5 1009.5 1006.2 1005.3 1002.9 997.6 996.4 995.6 1006.0 1011.5 1012.4 1004.6 995.6 DAY 7 26 27 3 28 18 24 14 18 14 12 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 785.4 786.7 785.3 784.0 786.1 786.3 786.9 786.3 790.5 791.2 790.2 784.9 787.0 MAX. QFE PRESSURE IN HPA 792.5 794.6 793.7 789.0 789.9 791.4 790.0 789.3 793.9 796.3 796.3 792.6 796.3 DAY 25 5 11 1 17 24 29 31 23 10 18 2 MIN. QFE PRESSURE IN HPA 776.8 778.1 778.1 775.3 783.1 781.3 782.4 783.0 786.6 786.4 783.8 773.7 773.7 DAY 7 26 22 3 11 19 23 17 10 21 25 20 MEAN QNH PRESSURE IN HPA 1018.4 1020.0 1018.4 1016.8 1019.3 1019.6 1020.3 1019.5 1024.7 1025.6 1024.3 1017.8 1020.4 MAX. QNH PRESSURE IN HPA 1027.2 1029.8 1028.7 1022.9 1024.0 1025.9 1024.1 1023.3 1028.9 1031.9 1031.9 1027.3 1031.9 DAY 25 5 11 1 17 24 29 31 23 10 18 2 MIN. QNH PRESSURE IN HPA 1007.8 1009.4 1009.4 1006.0 1015.6 1013.4 1014.7 1015.5 1019.9 1019.7 1016.5 1004.0 1004.0 DAY 7 26 22 3 11 19 23 17 10 21 25 20 MEAN QFF PRESSURE IN HPA 1025.8 1024.0 1016.5 1011.9 1009.5 1004.8 1002.5 1002.0 1009.6 1014.7 1022.5 1023.6 1013.9 MAX. QFF PRESSURE IN HPA 1036.4 1037.0 1030.2 1018.6 1015.6 1012.2 1007.6 1008.5 1015.5 1019.5 1032.7 1038.9 1038.9 DAY 27 4 10 1 16 7 29 30 20 6 17 14 MIN. QFF PRESSURE IN HPA 1007.9 1010.3 1004.8 1005.4 1003.3 998.3 997.6 996.4 1004.4 1010.1 1011.9 1005.5 996.4 DAY 7 26 26 3 28 18 23 14 5 14 11 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 785.2 786.5 785.3 783.9 786.1 786.4 787.1 786.4 790.4 791.1 790.0 784.7 786.9 MAX. QFE PRESSURE IN HPA 792.1 794.9 794.5 788.7 790.1 791.3 790.0 789.3 793.4 796.1 796.3 793.1 796.3 DAY 25 5 11 1 16 24 28 29 20 10 18 2 MIN. QFE PRESSURE IN HPA 776.0 778.1 778.1 774.5 782.9 780.9 782.8 782.9 786.6 786.3 784.2 772.8 772.8 DAY 7 26 21 3 11 19 23 16 10 29 12 20 MEAN QNH PRESSURE IN HPA 1018.2 1019.9 1018.3 1016.6 1019.3 1019.7 1020.5 1019.7 1024.6 1025.4 1024.2 1017.6 1020.3 MAX. QNH PRESSURE IN HPA 1026.7 1030.2 1029.7 1022.5 1024.2 1025.7 1024.1 1023.3 1028.3 1031.6 1031.9 1027.9 1031.9 DAY 25 5 11 1 16 24 28 29 20 10 18 2 MIN. QNH PRESSURE IN HPA 1006.8 1009.4 1009.4 1005.0 1015.4 1012.9 1015.2 1015.4 1019.9 1019.6 1017.0 1002.9 1002.9 DAY 7 26 21 3 11 19 23 16 10 29 12 20 MEAN QFF PRESSURE IN HPA 1024.3 1022.2 1015.5 1011.2 1008.9 1004.8 1002.5 1001.8 1009.1 1013.8 1021.4 1022.5 1013.2 MAX. QFF PRESSURE IN HPA 1035.5 1034.0 1029.2 1017.3 1016.5 1012.5 1008.0 1008.5 1013.9 1018.3 1030.3 1037.6 1037.6 DAY 24 4 10 5 16 3 29 31 20 7 17 14 MIN. QFF PRESSURE IN HPA 1008.6 1010.1 1001.4 1003.9 1001.0 998.1 996.7 996.2 1003.4 1009.7 1010.4 1003.7 996.2 DAY 7 24 26 3 19 18 23 14 5 14 11 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.0 -4.7 -1.8 7.0 11.5 17.1 21.8 21.8 16.4 12.4 2.4 -3.5 8.0 MINIMUN AIR TEMPERATURE (C) -8.2 -9.5 -6.3 1.7 4.5 8.4 12.8 12.5 7.6 5.7 -2.2 -6.9 1.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 26 27 23 2 0 0 0 0 0 0 10 20 108 DAYS WITH FREEZING MIN.<= 0 31 28 30 8 4 0 0 0 0 1 23 31 156 TEMPERATURE RECORDS LOWEST(C) -18.0 -18.0 -21.0 -6.0 -2.6 3.6 9.0 8.4 2.4 -3.6 -7.8 -14.8 -21.0 DAY 18 28 2 2 9 2 1 3 21 31 23 22 MAXIMUM AIR TEMPERATURE (C) 0.4 -0.4 2.5 13.1 18.4 24.4 29.7 29.8 24.7 19.4 7.9 0.1 14.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 13 12 0 0 0 0 25 DAYS WITH MAXIMUM TEMP. <= 0 16 17 6 0 0 0 0 0 0 0 1 15 55 TEMPERATURE RECORDS HIGHEST(C) 8.6 4.4 8.0 19.8 22.0 28.6 34.0 34.4 29.4 24.0 15.0 8.0 34.4 DAY 12 3 12 7 16 23 13 12 5 9 5 18 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 9.1 8.8 11.4 13.9 16.0 16.9 17.3 17.1 13.7 10.1 7.0 12.5 MEAN DAILY TEMP. (MDT) (C) -3.9 -4.9 -1.9 7.4 11.5 16.4 21.2 21.2 16.2 12.6 2.8 -3.4 7.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.1 26.2 23.5 0.0 0.0 0.0 0.0 49.8 HEATING DEG. DAYS(BASE 18 0C) 679.8 642.4 616.2 318.4 202.5 59.1 0.5 0.0 69.5 168.8 454.8 662.7 3874.7 DEWPOINT (MEAN C) -7.5 -8.2 -5.3 -0.1 0.6 1.7 3.0 1.1 -2.3 -2.1 -3.8 -6.8 -2.5 MIXING RATIO (G/KG) 2.86 2.77 3.44 5.00 5.31 5.67 6.39 5.48 4.30 4.38 3.82 3.16 4.38 VAPOUR PRESSURE (HPA) 3.59 3.46 4.31 6.26 6.67 7.09 7.97 6.87 5.41 5.51 4.81 3.97 5.49 SATURATION DEF. (HPA) 1.17 0.99 1.25 4.22 7.49 13.47 19.20 20.53 14.35 9.56 2.83 0.98 8.00 RELATIVE HUMIDITY (MEAN %) 78 78 78 65 52 39 33 28 32 41 67 79 56 RELATIVE HUMIDITY (MAX. %) 87 89 90 84 77 61 53 46 53 60 83 89 73 RELATIVE HUMIDITY (MIN. %) 69 66 64 44 30 22 18 15 15 24 49 68 40 RELATIVE HUMIDITY (MEAN% 03UTC) 83 81 84 78 71 59 52 46 51 55 78 81 68 RELATIVE HUMIDITY (MEAN% 09UTC) 75 73 71 48 36 27 24 21 21 28 56 77 46 RELATIVE HUMIDITY (MEAN% 15UTC) 78 78 75 57 38 26 21 17 21 35 65 79 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 28.0 102.9 71.0 74.4 26.9 7.5 0.0 0.4 0.0 6.1 44.2 61.1 422.5 DAYS WITH PRECIPITATION >=10 0 3 2 2 0 0 0 0 0 0 2 1 10 DAYS WITH PRECIPITATION >= 5 2 5 4 4 3 1 0 0 0 0 4 4 27 DAYS WITH PRECIPITATION >= 1 5 12 8 10 5 1 0 0 0 3 7 13 64 DAYS WITH PRECIPITATION 10 18 17 14 13 2 0 2 0 6 8 17 107 GREATEST DAILY PRECIPITATION 8.0 27.0 24.6 25.0 7.0 7.3 0.0 0.3 0.0 3.0 17.1 10.0 27.0 DAY 28 4 26 27 18 1 ** 22 ** 29 11 19 DAY WITH THUNDER STORM 0 0 2 6 9 2 0 3 0 3 0 2 27 DAYS WITH SNOW OR SLEET 10 18 16 1 0 0 0 0 0 0 5 16 66 DAYS WITH DUST 1 0 0 0 1 2 9 0 1 1 0 0 15 WIND DIRECTION (PREVAILING) 270 225 225 225 315 270 315 270 270 270 225 225 225 PREVAILING WIND SPEED(KNOTS) 14.4 13.6 15.8 15.9 13.6 12.9 12.5 13.5 12.4 12.5 14.1 12.4 13.8 PREVAILING WIND PERCENT 23.0 31.7 32.7 36.3 19.0 23.3 25.0 16.1 23.3 28.6 15.8 18.5 20.1 CALMS PERCENT OF WIND 40.7 29.9 22.6 10.8 28.2 27.9 23.0 32.7 32.9 25.4 33.8 38.7 28.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 243 230 226 230 262 274 280 253 250 240 233 200 242 VECTOR WIND MAGNITUDE(KNOTS) 5.5 6.8 8.0 8.8 5.0 5.9 4.4 1.8 3.7 7.2 4.0 3.4 5.1 WIND STEADINESES (MEAN %) 77.5 75.6 71.4 67.7 52.1 67.8 50.6 23.7 48.7 72.0 47.6 50.0 56.7 WIND SPEED (MEAN KNOTS) 7.1 9.0 11.2 13.0 9.6 8.7 8.7 7.6 7.6 10.0 8.4 6.8 9.0 FASTEST WIND DIRECTION 260 230 210 230 210 310 290 310 250 190 270 210 230 FASTEST WIND SPEED (KNOTS) 43 37 39 47 47 35 27 29 29 47 37 31 47 DAY 6 21 19 6 7 5 5 28 18 29 21 18 DAYS WITH SKY CLEAR (0-2)/8 10 5 8 5 15 24 30 29 30 18 12 7 193 DAYS WITH P.CLOUDY (3-6)/8 10 14 16 10 12 6 1 2 0 13 11 12 107 DAYS WITH CLOUDY (7-8)/8 11 9 7 15 4 0 0 0 0 0 7 10 63 DAYS WITH VISIBILITY =< 2 KM 10 11 7 6 3 1 0 0 0 0 5 13 56 DURATION OF SUNSHINE HOURS 150.8 171.7 198.8 218.6 315.7 353.8 380.6 371.4 336.1 276.1 188.4 130.9 3092.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 785.9 781.8 782.9 785.9 788.4 785.8 784.2 787.7 788.5 790.1 789.2 787.9 786.5 MAX. QFE PRESSURE IN HPA 794.1 789.3 791.5 793.2 792.8 789.4 790.7 791.0 793.5 796.7 797.0 795.4 797.0 DAY-HOUR 12- 6 6-18 2- 9 8- 9 1- 6 2-18 3- 6 8- 9 26- 6 15- 6 25- 6 11-18 MIN. QFE PRESSURE IN HPA 770.6 770.4 770.1 778.6 780.7 779.7 779.8 784.4 784.3 780.8 781.9 777.1 770.1 DAY-HOUR 28-12 19- 0 26- 6 21- 0 7-15 30-12 1-12 20-15 7-12 29- 3 9-12 6- 9 MEAN QNH PRESSURE IN HPA 1019.0 1014.0 1015.4 1019.0 1022.1 1018.9 1017.0 1021.2 1022.2 1024.2 1023.1 1021.5 1019.8 MAX. QNH PRESSURE IN HPA 1029.2 1023.3 1026.0 1028.1 1027.6 1023.4 1025.0 1025.4 1028.4 1032.4 1032.8 1030.8 1032.8 DAY-HOUR 12- 6 6-18 2- 9 8- 9 1- 6 2-18 3- 6 8- 9 26- 6 15- 6 25- 6 11-18 MIN. QNH PRESSURE IN HPA 1000.2 999.9 999.5 1010.0 1012.6 1011.4 1011.5 1017.2 1017.1 1012.8 1014.1 1008.2 999.5 DAY-HOUR 28-12 19- 0 26- 6 21- 0 7-15 30-12 1-12 20-15 7-12 29- 3 9-12 6- 9 MEAN QFF PRESSURE IN HPA 1023.8 1019.1 1017.8 1013.1 1012.3 1004.2 998.3 1002.7 1008.3 1013.8 1021.7 1025.9 1013.4 MAX. QFF PRESSURE IN HPA 1032.7 1035.8 1042.4 1024.4 1024.5 1015.3 1008.2 1007.3 1018.4 1022.0 1036.5 1041.4 1042.4 DAY-HOUR 11-15 28-15 2- 3 3- 6 1- 6 6- 6 3- 6 8- 3 23- 3 23- 3 25- 6 11-18 MIN. QFF PRESSURE IN HPA 1003.1 1002.0 998.3 1000.6 1003.5 994.4 993.8 998.1 1000.5 1002.5 1007.6 1006.0 993.8 DAY-HOUR 28-12 20- 3 26- 6 20-12 29- 0 30-12 25-12 27-12 7-12 29- 0 9- 0 18-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 785.7 781.5 782.6 785.4 788.2 785.8 784.1 787.6 788.4 789.9 789.1 787.7 786.3 MAX. QFE PRESSURE IN HPA 793.6 788.6 789.7 791.1 792.0 788.6 789.2 790.4 792.7 794.7 795.8 793.9 795.8 DAY 12 7 2 8 1 3 4 9 23 15 26 31 MIN. QFE PRESSURE IN HPA 775.7 770.4 773.4 778.6 782.3 781.5 780.0 785.2 785.0 781.1 782.9 779.6 770.4 DAY 29 19 13 21 29 30 1 1 8 29 20 19 MEAN QNH PRESSURE IN HPA 1018.8 1013.6 1014.9 1018.4 1021.9 1018.9 1016.8 1021.1 1022.2 1024.0 1023.0 1021.3 1019.6 MAX. QNH PRESSURE IN HPA 1028.6 1022.4 1023.8 1025.5 1026.6 1022.4 1023.1 1024.6 1027.5 1029.9 1031.3 1028.9 1031.3 DAY 12 7 2 8 1 3 4 9 23 15 26 31 MIN. QNH PRESSURE IN HPA 1006.5 999.9 1003.6 1010.0 1014.6 1013.6 1011.8 1018.2 1017.9 1013.1 1015.4 1011.3 999.9 DAY 29 19 13 21 29 30 1 1 8 29 20 19 MEAN QFF PRESSURE IN HPA 1023.0 1018.0 1017.1 1012.1 1012.3 1004.2 997.9 1002.4 1007.4 1012.9 1020.7 1024.9 1012.7 MAX. QFF PRESSURE IN HPA 1029.7 1028.0 1037.9 1021.7 1023.2 1011.5 1006.5 1006.1 1016.4 1019.2 1031.7 1039.7 1039.7 DAY 31 6 2 30 1 5 3 8 23 23 25 12 MIN. QFF PRESSURE IN HPA 1009.4 1003.8 999.4 1001.5 1003.5 995.4 994.6 999.3 1000.9 1002.5 1007.6 1008.2 994.6 DAY 29 20 26 20 29 30 17 28 1 29 9 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 785.6 781.4 782.5 785.5 788.4 785.9 784.4 787.9 788.6 790.0 789.0 787.5 786.4 MAX. QFE PRESSURE IN HPA 793.6 788.2 790.0 791.4 791.9 788.6 790.0 790.6 793.0 795.3 795.5 793.1 795.5 DAY 12 6 2 8 11 9 3 9 23 15 25 31 MIN. QFE PRESSURE IN HPA 774.7 770.4 771.4 779.3 782.6 781.6 780.2 785.3 785.3 780.8 783.2 778.2 770.4 DAY 28 19 26 20 29 30 1 22 7 29 20 6 MEAN QNH PRESSURE IN HPA 1018.7 1013.5 1014.8 1018.6 1022.2 1019.1 1017.2 1021.6 1022.4 1024.1 1022.9 1021.0 1019.7 MAX. QNH PRESSURE IN HPA 1028.6 1021.9 1024.1 1025.9 1026.5 1022.4 1024.1 1024.9 1027.8 1030.7 1030.9 1027.9 1030.9 DAY 12 6 2 8 11 9 3 9 23 15 25 31 MIN. QNH PRESSURE IN HPA 1005.2 999.9 1001.2 1010.9 1015.0 1013.8 1012.0 1018.3 1018.3 1012.8 1015.7 1009.6 999.9 DAY 28 19 26 20 29 30 1 22 7 29 20 6 MEAN QFF PRESSURE IN HPA 1024.1 1019.0 1018.3 1013.5 1012.8 1004.8 999.2 1004.0 1009.8 1015.1 1022.5 1026.0 1014.1 MAX. QFF PRESSURE IN HPA 1032.3 1030.5 1042.4 1022.7 1023.7 1012.2 1007.2 1007.3 1018.4 1022.0 1034.8 1040.2 1042.4 DAY 31 28 2 2 1 6 3 8 23 23 25 12 MIN. QFF PRESSURE IN HPA 1010.5 1002.0 998.8 1002.1 1004.8 997.3 995.9 1001.7 1002.5 1003.4 1009.4 1010.9 995.9 DAY 28 20 26 20 29 29 7 14 6 29 9 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 786.4 782.3 783.3 786.3 788.9 786.4 784.8 788.4 789.2 790.7 789.9 788.4 787.1 MAX. QFE PRESSURE IN HPA 794.1 789.2 791.0 792.3 792.8 789.2 790.7 790.7 793.5 796.7 797.0 794.4 797.0 DAY 12 6 2 8 1 9 3 8 26 15 25 30 MIN. QFE PRESSURE IN HPA 774.1 771.0 770.1 780.0 783.3 781.8 780.6 786.5 785.7 782.0 784.1 777.9 770.1 DAY 28 19 26 20 7 30 1 24 7 29 9 6 MEAN QNH PRESSURE IN HPA 1019.6 1014.6 1015.9 1019.5 1022.8 1019.6 1017.7 1022.2 1023.2 1025.0 1024.0 1022.2 1020.5 MAX. QNH PRESSURE IN HPA 1029.2 1023.1 1025.4 1027.0 1027.6 1023.1 1025.0 1025.0 1028.4 1032.4 1032.8 1029.6 1032.8 DAY 12 6 2 8 1 9 3 8 26 15 25 30 MIN. QNH PRESSURE IN HPA 1004.5 1000.7 999.5 1011.8 1015.9 1014.0 1012.5 1019.8 1018.8 1014.2 1016.8 1009.2 999.5 DAY 28 19 26 20 7 30 1 24 7 29 9 6 MEAN QFF PRESSURE IN HPA 1024.9 1020.1 1018.6 1013.9 1013.0 1004.9 999.1 1003.6 1009.2 1014.4 1022.7 1027.0 1014.3 MAX. QFF PRESSURE IN HPA 1032.3 1031.8 1041.7 1024.4 1024.5 1015.3 1008.2 1007.0 1018.0 1021.7 1036.5 1040.8 1041.7 DAY 31 12 2 3 1 6 3 3 23 31 25 12 MIN. QFF PRESSURE IN HPA 1009.1 1003.6 998.3 1003.0 1005.5 996.8 995.4 1000.3 1001.9 1004.0 1012.2 1010.0 995.4 DAY 28 20 26 20 29 30 8 13 6 29 9 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 786.1 782.3 783.5 786.2 788.7 786.0 784.4 788.1 788.8 790.3 789.4 788.0 786.8 MAX. QFE PRESSURE IN HPA 793.3 789.0 791.5 793.2 792.8 788.9 790.6 791.0 792.9 796.1 796.5 794.1 796.5 DAY 12 6 2 8 1 10 3 8 26 15 25 30 MIN. QFE PRESSURE IN HPA 772.0 772.0 771.9 780.2 782.2 780.9 780.3 785.8 785.2 783.1 783.0 777.1 771.9 DAY 28 19 26 20 7 30 1 27 7 29 9 6 MEAN QNH PRESSURE IN HPA 1019.3 1014.6 1016.0 1019.4 1022.5 1019.2 1017.3 1021.7 1022.6 1024.5 1023.4 1021.7 1020.2 MAX. QNH PRESSURE IN HPA 1028.2 1022.9 1026.0 1028.1 1027.6 1022.8 1024.9 1025.4 1027.7 1031.6 1032.1 1029.2 1032.1 DAY 12 6 2 8 1 10 3 8 26 15 25 30 MIN. QNH PRESSURE IN HPA 1001.9 1001.9 1001.8 1012.0 1014.5 1012.9 1012.1 1018.9 1018.2 1015.6 1015.5 1008.2 1001.8 DAY 28 19 26 20 7 30 1 27 7 29 9 6 MEAN QFF PRESSURE IN HPA 1023.6 1019.2 1018.1 1012.9 1012.5 1004.1 998.1 1002.5 1008.1 1013.2 1021.4 1025.5 1013.3 MAX. QFF PRESSURE IN HPA 1030.5 1032.8 1041.0 1022.1 1023.9 1013.6 1007.8 1005.9 1016.2 1019.4 1033.1 1040.4 1041.0 DAY 11 28 2 3 1 6 3 8 23 23 25 12 MIN. QFF PRESSURE IN HPA 1005.6 1003.0 1002.2 1003.3 1004.4 995.2 994.6 999.0 1001.2 1004.1 1008.7 1009.0 994.6 DAY 28 19 26 20 7 30 17 13 6 29 9 6 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 785.4 781.5 782.7 785.5 788.0 785.2 783.6 787.1 787.8 789.5 788.6 787.5 786.0 MAX. QFE PRESSURE IN HPA 792.5 789.0 790.5 791.1 791.9 788.5 789.9 790.0 792.0 794.8 796.2 794.2 796.2 DAY 11 6 2 30 1 9 3 11 27 15 25 30 MIN. QFE PRESSURE IN HPA 770.6 771.6 772.2 778.9 782.0 779.7 779.8 784.6 784.3 783.3 781.9 777.7 770.6 DAY 28 19 26 20 7 30 1 27 7 27 9 6 MEAN QNH PRESSURE IN HPA 1018.4 1013.6 1015.1 1018.5 1021.6 1018.2 1016.3 1020.5 1021.4 1023.5 1022.4 1021.0 1019.2 MAX. QNH PRESSURE IN HPA 1027.2 1022.9 1024.7 1025.5 1026.5 1022.3 1024.0 1024.1 1026.6 1030.0 1031.8 1029.3 1031.8 DAY 11 6 2 30 1 9 3 11 27 15 25 30 MIN. QNH PRESSURE IN HPA 1000.2 1001.4 1002.1 1010.4 1014.2 1011.4 1011.5 1017.5 1017.1 1015.9 1014.1 1008.9 1000.2 DAY 28 19 26 20 7 30 1 27 7 27 9 6 MEAN QFF PRESSURE IN HPA 1022.4 1018.0 1017.0 1012.1 1011.9 1003.4 997.3 1001.8 1006.8 1012.6 1020.3 1024.6 1012.3 MAX. QFF PRESSURE IN HPA 1028.8 1031.4 1038.0 1022.1 1022.6 1011.9 1006.9 1005.6 1014.6 1018.3 1032.6 1037.3 1038.0 DAY 11 28 2 30 1 6 3 8 22 15 25 12 MIN. QFF PRESSURE IN HPA 1003.1 1002.9 1002.4 1000.6 1004.2 994.4 993.8 998.1 1000.5 1005.4 1008.1 1009.6 993.8 DAY 28 19 26 20 29 30 25 27 7 27 9 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 785.9 781.6 782.7 785.6 787.7 785.1 783.6 786.8 787.8 789.7 789.0 787.9 786.1 MAX. QFE PRESSURE IN HPA 793.0 789.0 790.6 791.3 791.4 788.7 788.8 789.4 791.8 794.8 796.2 795.0 796.2 DAY 7 6 2 30 11 9 3 11 22 15 25 11 MIN. QFE PRESSURE IN HPA 771.9 772.5 772.6 778.7 780.7 779.7 780.5 784.4 784.6 783.3 783.0 779.1 771.9 DAY 28 19 26 20 7 30 25 20 7 28 9 6 MEAN QNH PRESSURE IN HPA 1019.0 1013.8 1015.1 1018.7 1021.2 1018.1 1016.2 1020.2 1021.4 1023.8 1022.9 1021.5 1019.3 MAX. QNH PRESSURE IN HPA 1027.8 1022.9 1024.9 1025.7 1025.9 1022.5 1022.6 1023.4 1026.3 1030.0 1031.8 1030.3 1031.8 DAY 7 6 2 30 11 9 3 11 22 15 25 11 MIN. QNH PRESSURE IN HPA 1001.8 1002.5 1002.6 1010.2 1012.6 1011.4 1012.4 1017.2 1017.5 1015.9 1015.5 1010.7 1001.8 DAY 28 19 26 20 7 30 25 20 7 28 9 6 MEAN QFF PRESSURE IN HPA 1024.4 1019.5 1018.2 1013.5 1011.8 1003.9 998.2 1002.6 1009.0 1014.9 1022.6 1026.6 1013.8 MAX. QFF PRESSURE IN HPA 1032.7 1035.8 1041.8 1023.0 1022.1 1012.4 1004.8 1005.4 1016.5 1020.7 1035.0 1039.9 1041.8 DAY 11 28 2 2 1 6 3 3 22 22 25 12 MIN. QFF PRESSURE IN HPA 1005.6 1004.3 1003.8 1002.9 1004.3 996.6 994.2 1000.3 1001.5 1006.6 1011.1 1012.0 994.2 DAY 28 19 26 20 7 30 7 20 5 27 9 6 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 786.2 782.1 783.1 786.3 788.5 785.9 784.5 787.8 788.6 790.3 789.4 788.3 786.8 MAX. QFE PRESSURE IN HPA 793.6 789.3 790.3 792.4 791.7 789.4 789.0 790.7 792.8 795.5 796.5 795.4 796.5 DAY 11 6 2 7 11 2 3 8 22 15 25 11 MIN. QFE PRESSURE IN HPA 773.6 772.5 772.6 779.1 781.5 780.3 781.4 785.3 785.3 782.5 783.6 781.4 772.5 DAY 28 18 26 20 7 30 25 21 7 28 19 6 MEAN QNH PRESSURE IN HPA 1019.4 1014.3 1015.6 1019.6 1022.3 1019.0 1017.3 1021.4 1022.4 1024.5 1023.4 1022.0 1020.1 MAX. QNH PRESSURE IN HPA 1028.6 1023.3 1024.5 1027.1 1026.2 1023.4 1022.9 1025.0 1027.6 1030.9 1032.1 1030.8 1032.1 DAY 11 6 2 7 11 2 3 8 22 15 25 11 MIN. QNH PRESSURE IN HPA 1003.9 1002.5 1002.6 1010.7 1013.6 1012.1 1013.5 1018.3 1018.3 1014.9 1016.2 1013.5 1002.5 DAY 28 18 26 20 7 30 25 21 7 28 19 6 MEAN QFF PRESSURE IN HPA 1024.6 1020.0 1018.2 1013.9 1012.4 1004.3 998.8 1002.9 1008.6 1014.0 1022.3 1026.9 1013.9 MAX. QFF PRESSURE IN HPA 1031.9 1032.8 1038.4 1024.3 1022.2 1012.6 1006.3 1005.3 1016.9 1020.5 1033.4 1041.4 1041.4 DAY 11 6 1 29 1 6 2 3 22 22 24 11 MIN. QFF PRESSURE IN HPA 1008.8 1006.0 1003.0 1002.7 1005.3 995.5 995.0 1000.6 1001.6 1005.0 1011.1 1011.8 995.0 DAY 28 19 12 20 7 30 7 20 6 28 8 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 786.0 781.9 783.0 786.3 788.6 785.9 784.6 787.9 788.6 790.2 789.3 788.0 786.7 MAX. QFE PRESSURE IN HPA 793.6 788.9 790.2 792.4 791.4 789.4 789.4 790.9 792.9 795.4 796.5 794.3 796.5 DAY 11 6 2 7 10 2 3 8 22 15 25 30 MIN. QFE PRESSURE IN HPA 774.5 771.6 773.2 779.1 782.3 780.6 781.6 785.3 785.3 781.9 783.4 779.3 771.6 DAY 28 18 26 20 7 30 25 21 7 28 19 18 MEAN QNH PRESSURE IN HPA 1019.2 1014.1 1015.5 1019.6 1022.4 1019.0 1017.5 1021.6 1022.5 1024.4 1023.2 1021.6 1020.1 MAX. QNH PRESSURE IN HPA 1028.6 1022.8 1024.4 1027.1 1025.9 1023.4 1023.4 1025.2 1027.7 1030.8 1032.1 1029.4 1032.1 DAY 11 6 2 7 10 2 3 8 22 15 25 30 MIN. QNH PRESSURE IN HPA 1005.0 1001.4 1003.4 1010.7 1014.6 1012.5 1013.8 1018.3 1018.3 1014.1 1016.0 1010.9 1001.4 DAY 28 18 26 20 7 30 25 21 7 28 19 18 MEAN QFF PRESSURE IN HPA 1023.5 1019.0 1017.3 1013.1 1012.2 1003.9 998.3 1002.4 1008.0 1013.1 1021.4 1025.6 1013.1 MAX. QFF PRESSURE IN HPA 1029.5 1033.2 1038.7 1023.5 1020.8 1011.9 1006.1 1005.8 1015.9 1019.8 1031.8 1040.9 1040.9 DAY 7 28 1 29 1 2 2 3 22 22 24 11 MIN. QFF PRESSURE IN HPA 1008.5 1005.2 1002.8 1002.1 1004.9 995.9 995.3 999.7 1001.3 1002.7 1007.8 1006.0 995.3 DAY 28 19 12 20 28 29 25 13 5 28 8 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1989-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.4 -4.6 -0.2 7.3 12.6 18.6 22.3 22.1 17.1 10.8 3.5 -2.1 8.5 MINIMUN AIR TEMPERATURE (C) -9.9 -9.5 -5.0 1.4 5.0 8.9 13.1 12.7 8.0 3.8 -1.4 -6.5 1.7 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.1 DAYS WITH MINIMUM TEMP. <=-4 27.5 25.5 17.4 1.7 0.0 0.0 0.0 0.0 0.0 0.1 6.4 21.3 99.9 DAYS WITH FREEZING MIN.<= 0 30.6 28.2 28.1 9.9 1.8 0.0 0.0 0.0 0.2 3.0 20.0 29.3 151.1 TEMPERATURE RECORDS LOWEST(C) -23.0 -22.6 -21.0 -12.4 -3.0 1.2 5.8 4.0 -2.4 -5.0 -16.5 -21.0 -23.0 YEAR-DAY 96-22 93-16 3- 2 97-12 99-22 96- 7 94- 1 0-31 2-10 96-28 93-15 2-14 96-22 MAXIMUM AIR TEMPERATURE (C) -1.1 -0.3 4.2 12.4 18.0 24.6 29.1 29.4 24.3 16.8 8.4 2.0 14.0 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.0 0.0 0.0 1.3 12.9 15.4 0.9 0.0 0.0 0.0 30.5 DAYS WITH MAXIMUM TEMP. <= 0 19.9 15.1 6.1 0.3 0.0 0.0 0.0 0.0 0.0 0.0 1.3 10.8 53.5 TEMPERATURE RECORDS HIGHEST(C) 11.0 9.0 17.3 23.0 28.6 33.0 35.0 36.5 32.4 25.6 18.9 17.0 36.5 YEAR-DAY 0- 1 96-25 1-28 97-25 99-30 0-30 98-12 91- 8 98- 1 2- 1 90- 4 98-10 91- 8 DIF. BETWEEN (MAX.-MIN.) (C) 8.8 9.2 9.2 11.0 13.0 15.7 16.0 16.7 16.3 13.0 9.8 8.5 12.3 MEAN DAILY TEMP. (MDT) (C) -5.5 -4.9 -0.4 6.9 11.5 16.8 21.1 21.0 16.2 10.3 3.5 -2.2 7.9 STANDARD DEVIATION OF MDT(C) 1.75 2.06 2.74 1.72 1.09 1.08 0.70 1.03 0.95 1.34 1.72 2.45 1.55 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.0 29.8 28.2 0.6 0.0 0.0 0.0 59.6 HEATING DEG. DAYS(BASE 18 0C) 728.7 646.7 570.0 332.3 201.4 52.0 3.9 3.2 65.2 238.6 435.2 626.4 3903.6 DEWPOINT (MEAN C) -9.4 -8.8 -5.4 -1.4 0.6 1.2 3.7 1.9 -1.5 -1.3 -3.3 -7.0 -2.6 MIXING RATIO (G/KG) 2.56 2.68 3.42 4.57 5.33 5.54 6.64 5.88 4.60 4.60 4.01 3.08 4.41 VAPOUR PRESSURE (HPA) 3.22 3.35 4.29 5.73 6.68 6.94 8.29 7.37 5.79 5.80 5.05 3.88 5.53 SATURATION DEF. (HPA) 1.08 1.19 2.08 4.93 8.54 15.57 19.87 20.58 14.87 7.82 3.22 1.66 8.45 RELATIVE HUMIDITY (MEAN %) 76 74 70 60 49 35 33 30 32 48 66 72 54 RELATIVE HUMIDITY (MAX. %) 84 84 83 79 71 56 53 48 51 67 82 83 70 RELATIVE HUMIDITY (MIN. %) 66 64 57 42 33 22 20 17 19 32 49 61 40 RELATIVE HUMIDITY (MEAN% 03UTC) 79 77 77 75 69 54 51 47 49 64 76 76 66 RELATIVE HUMIDITY (MEAN% 09UTC) 72 70 64 49 39 26 26 23 24 38 56 67 46 RELATIVE HUMIDITY (MEAN% 15UTC) 76 75 68 54 41 26 24 20 24 44 64 72 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 45.7 42.4 60.6 72.2 33.7 8.2 6.0 1.5 2.3 26.6 51.9 42.5 393.6 DAYS WITH PRECIPITATION >=10 0.9 1.1 1.8 2.3 0.8 0.2 0.1 0.0 0.0 0.6 1.7 1.2 10.7 DAYS WITH PRECIPITATION >= 5 3.1 2.6 3.9 4.4 2.6 0.5 0.5 0.1 0.1 1.9 2.9 2.4 25.0 DAYS WITH PRECIPITATION >= 1 9.0 7.6 8.6 7.5 5.7 1.3 1.1 0.3 0.7 4.1 6.3 7.6 59.8 DAYS WITH PRECIPITATION 12.8 11.7 12.6 11.5 9.7 2.6 2.2 1.2 1.1 6.2 8.3 11.1 91.0 GREATEST DAILY PRECIPITATION 27.0 30.0 56.0 52.0 30.0 20.0 18.0 8.0 7.6 53.0 54.0 37.0 56.0 YEAR-DAY 97-10 92-24 98-18 96-13 95- 5 95- 4 2-22 92-29 0-29 89-30 93- 2 2- 9 98 DAY WITH THUNDER STORM 0.1 0.0 0.3 1.5 2.9 1.2 1.0 0.7 0.5 0.9 0.3 0.2 9.6 DAYS WITH SNOW OR SLEET 11.1 9.8 9.2 3.1 0.3 0.0 0.0 0.0 0.0 0.1 3.7 8.9 46.2 DAYS WITH DUST 0.1 0.1 0.2 1.3 1.7 1.3 1.7 0.5 0.5 0.5 0.1 0.3 8.3 WIND DIRECTION (PREVAILING) 270 225 225 225 270 270 90 270 270 270 225 225 270 PREVAILING WIND SPEED(KNOTS) 13.3 12.9 13.5 15.0 13.5 12.3 9.7 12.4 12.3 12.6 12.5 11.7 12.8 PREVAILING WIND PERCENT 13.9 17.9 19.4 23.7 21.7 20.1 11.9 15.5 22.9 20.2 14.2 16.8 17.5 CALMS PERCENT OF WIND 53.1 44.3 39.6 29.0 31.6 37.3 41.1 41.9 37.4 41.7 47.4 49.5 41.2 NO. OF WIND OBSERVATION 208.1 189.5 208.1 193.9 198.3 193.5 206.3 212.6 209.3 207.8 204.0 210.8 2442.2 VECTOR WIND DIRECTION (MEAN) 246 244 243 240 249 254 245 247 251 248 237 234 245 VECTOR WIND MAGNITUDE(KNOTS) 3.2 4.8 4.8 6.6 5.5 3.7 1.0 2.0 3.8 4.2 3.3 3.4 3.8 WIND STEADINESES (MEAN %) 58.2 65.8 65.8 70.2 66.3 51.4 15.9 31.7 55.1 60.9 55.9 61.8 55.1 WIND SPEED (MEAN KNOTS) 5.5 7.3 7.3 9.4 8.3 7.2 6.3 6.3 6.9 6.9 5.9 5.5 6.9 FASTEST WIND DIRECTION 210 310 310 280 210 210 240 270 240 230 300 190 210 FASTEST WIND SPEED (KNOTS) 58 49 49 49 47 49 33 45 39 47 49 43 58 YEAR-DAY 0-19 94-19 93-22 93-14 3- 7 99- 4 92-10 99-28 92-27 99- 9 93-14 2-20 0 DAYS WITH SKY CLEAR (0-2)/8 11.4 10.8 11.5 9.0 15.0 25.7 26.7 27.6 27.3 19.3 13.2 10.4 207.9 DAYS WITH P.CLOUDY (3-6)/8 9.8 9.2 11.1 13.7 12.0 4.0 4.1 3.3 2.7 9.5 10.7 11.9 102.0 DAYS WITH CLOUDY (7-8)/8 9.8 8.1 8.4 7.3 4.0 0.3 0.2 0.1 0.0 2.2 6.1 8.6 55.1 DAYS WITH VISIBILITY =< 2 KM 7.4 6.8 5.7 2.5 1.1 0.3 0.1 0.0 0.0 0.9 4.4 6.9 36.1 DURATION OF SUNSHINE HOURS 149.2 177.1 211.4 235.3 291.2 353.4 362.6 349.4 318.1 261.0 187.9 149.0 3045.6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1989-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 784.8 783.7 783.9 785.6 787.0 785.9 785.3 786.8 788.6 790.3 788.7 786.8 786.4 MAX. QFE PRESSURE IN HPA 794.2 795.6 794.7 797.0 795.5 792.9 793.0 793.4 796.3 797.1 797.3 795.7 797.3 YEAR-DAY 99- 2 2- 6 2-11 98-12 98- 8 93-22 0-30 99-18 94-23 93-17 97- 8 98- 9 97- 8 MIN. QFE PRESSURE IN HPA 770.6 769.3 770.1 773.7 778.2 778.0 779.6 779.4 780.8 780.8 771.8 770.5 769.3 YEAR-DAY 3-28 1-21 3-26 2- 3 93-12 99-25 91-13 89- 1 96-21 3-29 1-18 2-21 1-21 MEAN QNH PRESSURE IN HPA 1017.7 1016.3 1016.6 1018.6 1020.4 1019.1 1018.3 1020.2 1022.4 1024.4 1022.5 1020.2 1019.7 MAX. QNH PRESSURE IN HPA 1029.3 1031.0 1029.9 1032.8 1030.9 1027.7 1027.8 1028.3 1031.9 1032.9 1033.1 1031.2 1033.1 YEAR-DAY 99- 2 2- 6 2-11 98-12 98- 8 93-22 0-30 99-18 94-23 93-17 97- 8 98- 9 97- 8 MIN. QNH PRESSURE IN HPA 1000.2 998.6 999.5 1004.0 1009.6 1009.3 1011.3 1011.0 1012.8 1012.8 1001.6 1000.0 998.6 YEAR-DAY 3-28 1-21 3-26 2- 3 93-12 99-25 91-13 89- 1 96-21 3-29 1-18 2-21 1-21 MEAN QFF PRESSURE IN HPA 1024.1 1021.5 1016.8 1013.1 1010.1 1003.8 1000.7 1002.2 1008.0 1015.4 1020.6 1024.0 1013.3 MAX. QFF PRESSURE IN HPA 1040.5 1038.8 1042.4 1028.2 1024.5 1018.2 1009.4 1014.2 1020.2 1029.8 1036.5 1041.7 1042.4 YEAR-DAY 96-26 97- 7 3- 2 97-13 3- 1 93-22 0-30 99-20 95-22 95-25 3-25 94- 7 3- 2 MIN. QFF PRESSURE IN HPA 1003.1 1000.3 998.3 1000.3 996.3 990.9 989.8 992.5 998.4 1002.5 1000.4 1000.2 989.8 YEAR-DAY 97-15 1-21 3-26 99- 8 1-29 99-25 0-11 97- 4 95- 4 3-29 1-18 2-21 0-11 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 785.3 783.9 783.4 785.1 786.6 785.7 785.7 787.1 788.3 789.8 788.7 787.3 786.4 MAX. QFE PRESSURE IN HPA 793.6 794.9 794.0 794.1 793.6 791.9 792.4 792.9 793.0 795.9 796.9 794.7 796.9 YEAR-DAY 3-12 2- 6 2-12 1- 2 99-28 93-23 96- 4 99-20 95-13 2-11 96-16 98-10 96-16 MIN. QFE PRESSURE IN HPA 773.5 770.4 773.0 774.0 778.7 778.0 779.9 782.0 780.8 781.1 775.2 771.5 770.4 YEAR-DAY 97-16 3-19 97- 7 2- 4 1- 9 99-25 99-14 0-31 96-22 3-29 1-18 2-21 3-19 MEAN QNH PRESSURE IN HPA 1018.3 1016.6 1015.9 1018.1 1019.9 1018.8 1018.8 1020.5 1022.0 1023.9 1022.5 1020.8 1019.7 MAX. QNH PRESSURE IN HPA 1028.6 1030.2 1029.1 1029.2 1028.6 1026.5 1027.1 1027.7 1027.8 1031.4 1032.6 1029.9 1032.6 YEAR-DAY 3-12 2- 6 2-12 1- 2 99-28 93-23 96- 4 99-20 95-13 2-11 96-16 98-10 96-16 MIN. QNH PRESSURE IN HPA 1003.7 999.9 1003.1 1004.4 1010.2 1009.3 1011.7 1014.2 1012.8 1013.1 1005.9 1001.3 999.9 YEAR-DAY 97-16 3-19 97- 7 2- 4 1- 9 99-25 99-14 0-31 96-22 3-29 1-18 2-21 3-19 MEAN QFF PRESSURE IN HPA 1023.1 1020.4 1016.0 1012.4 1009.7 1003.8 1000.5 1001.8 1007.2 1014.5 1019.6 1023.1 1012.7 MAX. QFF PRESSURE IN HPA 1036.5 1033.9 1037.9 1026.2 1023.2 1015.7 1008.7 1014.2 1020.2 1027.9 1034.0 1039.7 1039.7 YEAR-DAY 99- 2 97- 9 3- 2 97-13 3- 1 93-22 1-22 99-20 97-15 95-26 96-18 3-12 3-12 MIN. QFF PRESSURE IN HPA 1004.1 1002.1 999.4 1001.5 997.0 990.9 990.8 994.4 999.8 1002.5 1004.0 1001.5 990.8 YEAR-DAY 97-16 1-21 3-26 3-20 1-30 99-25 0-11 97- 4 0- 1 3-29 1-18 2-21 0-11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 784.6 783.3 783.6 785.4 786.9 786.0 785.5 787.1 788.7 790.2 788.6 786.5 786.4 MAX. QFE PRESSURE IN HPA 793.6 794.9 794.0 795.7 794.7 792.5 792.4 792.8 795.3 796.5 796.5 794.9 796.5 YEAR-DAY 3-12 2- 6 2-11 98-12 98- 8 98-17 96- 4 99-20 94-23 93-18 96-18 98- 9 93-18 MIN. QFE PRESSURE IN HPA 771.8 769.3 771.4 774.2 778.2 778.6 780.2 781.1 781.0 780.8 772.7 770.6 769.3 YEAR-DAY 98-13 1-21 3-26 90- 2 93-12 99-25 3- 1 89- 2 96-22 3-29 1-18 2-21 1-21 MEAN QNH PRESSURE IN HPA 1017.4 1015.8 1016.3 1018.4 1020.2 1019.2 1018.6 1020.5 1022.5 1024.4 1022.4 1019.8 1019.6 MAX. QNH PRESSURE IN HPA 1028.6 1030.2 1029.1 1031.2 1029.9 1027.2 1027.1 1027.6 1030.7 1032.1 1032.1 1030.2 1032.1 YEAR-DAY 3-12 2- 6 2-11 98-12 98- 8 98-17 96- 4 99-20 94-23 93-18 96-18 98- 9 93-18 MIN. QNH PRESSURE IN HPA 1001.6 998.6 1001.2 1004.6 1009.6 1010.0 1012.0 1013.1 1013.0 1012.8 1002.8 1000.2 998.6 YEAR-DAY 98-13 1-21 3-26 90- 2 93-12 99-25 3- 1 89- 2 96-22 3-29 1-18 2-21 1-21 MEAN QFF PRESSURE IN HPA 1024.7 1022.2 1018.4 1013.8 1010.9 1004.6 1000.8 1003.2 1009.8 1017.3 1021.4 1023.9 1014.2 MAX. QFF PRESSURE IN HPA 1041.0 1040.5 1043.7 1028.2 1023.7 1017.4 1009.2 1015.8 1020.9 1030.0 1036.2 1044.5 1044.5 YEAR-DAY 90-26 98-23 92-12 97-13 3- 1 93-22 96- 9 92-12 94-22 90-16 96-18 90-28 90-28 MIN. QFF PRESSURE IN HPA 1004.9 1000.3 998.8 1001.7 998.5 993.8 991.7 994.4 1000.5 1003.4 1001.6 1000.2 991.7 YEAR-DAY 97-16 1-21 3-26 99- 8 1-30 99-25 0-11 94- 1 0- 3 3-29 1-18 2-21 0-11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1989-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 785.3 784.1 784.4 786.0 787.4 786.4 785.9 787.6 789.3 791.0 789.4 787.3 787.0 MAX. QFE PRESSURE IN HPA 794.2 795.3 794.7 796.5 795.5 792.9 793.0 793.4 796.3 797.1 797.3 795.7 797.3 YEAR-DAY 99- 2 2- 6 2-11 98-12 98- 8 93-22 0-30 99-20 94-23 93-17 97- 8 98- 9 97- 8 MIN. QFE PRESSURE IN HPA 773.0 770.1 770.1 774.9 778.8 779.3 780.6 781.4 782.0 782.0 772.9 771.2 770.1 YEAR-DAY 0-21 1-21 3-26 2- 3 93-12 99-25 95-16 94- 2 96-22 3-29 1-18 2-21 1-21 MEAN QNH PRESSURE IN HPA 1018.4 1016.8 1017.2 1019.2 1020.9 1019.7 1019.1 1021.1 1023.2 1025.3 1023.4 1020.8 1020.4 MAX. QNH PRESSURE IN HPA 1029.3 1030.7 1029.9 1032.1 1030.9 1027.7 1027.8 1028.3 1031.9 1032.9 1033.1 1031.2 1033.1 YEAR-DAY 99- 2 2- 6 2-11 98-12 98- 8 93-22 0-30 99-20 94-23 93-17 97- 8 98- 9 97- 8 MIN. QNH PRESSURE IN HPA 1003.1 999.5 999.5 1005.5 1010.3 1010.9 1012.5 1013.5 1014.2 1014.2 1003.0 1000.9 999.5 YEAR-DAY 0-21 1-21 3-26 2- 3 93-12 99-25 95-16 94- 2 96-22 3-29 1-18 2-21 1-21 MEAN QFF PRESSURE IN HPA 1025.4 1022.8 1017.7 1013.8 1010.6 1004.4 1001.4 1002.9 1008.5 1016.2 1021.6 1025.2 1014.2 MAX. QFF PRESSURE IN HPA 1039.9 1038.8 1041.7 1026.9 1024.5 1018.2 1009.4 1013.7 1019.6 1029.8 1036.5 1041.4 1041.7 YEAR-DAY 96-26 97- 7 3- 2 97-12 3- 1 93-22 0-30 99-20 0-29 95-25 3-25 94- 7 3- 2 MIN. QFF PRESSURE IN HPA 1006.4 1003.3 998.3 1000.3 999.4 994.2 992.3 994.7 1000.2 1004.0 1001.1 1001.8 992.3 YEAR-DAY 0-21 1-21 3-26 99- 8 1-29 99-24 0-11 97- 5 0- 3 3-29 1-18 2-21 0-11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 785.1 784.1 784.4 785.9 787.3 786.2 785.6 787.2 788.9 790.5 788.9 787.0 786.7 MAX. QFE PRESSURE IN HPA 793.8 795.6 794.7 797.0 795.4 792.9 792.9 793.0 796.2 796.8 796.8 795.3 797.0 YEAR-DAY 94- 9 2- 6 2-11 98-12 98- 8 93-22 0-30 96-29 94-23 93-17 96-18 98- 9 98-12 MIN. QFE PRESSURE IN HPA 772.0 770.3 771.9 774.6 779.2 779.5 780.3 781.0 782.1 783.1 771.8 770.5 770.3 YEAR-DAY 3-28 1-21 3-26 2- 3 90-13 99-25 3- 1 94- 1 96-21 3-29 1-18 2-21 1-21 MEAN QNH PRESSURE IN HPA 1018.1 1016.8 1017.1 1019.1 1020.7 1019.4 1018.7 1020.6 1022.7 1024.8 1022.8 1020.4 1020.1 MAX. QNH PRESSURE IN HPA 1028.8 1031.0 1029.9 1032.8 1030.8 1027.7 1027.7 1027.8 1031.8 1032.5 1032.5 1030.7 1032.8 YEAR-DAY 94- 9 2- 6 2-11 98-12 98- 8 93-22 0-30 96-29 94-23 93-17 96-18 98- 9 98-12 MIN. QNH PRESSURE IN HPA 1001.9 999.8 1001.8 1005.1 1010.8 1011.2 1012.1 1013.0 1014.4 1015.6 1001.6 1000.0 999.8 YEAR-DAY 3-28 1-21 3-26 2- 3 90-13 99-25 3- 1 94- 1 96-21 3-29 1-18 2-21 1-21 MEAN QFF PRESSURE IN HPA 1023.6 1021.3 1016.8 1013.0 1010.1 1003.8 1000.7 1002.0 1007.6 1014.9 1020.1 1023.6 1013.1 MAX. QFF PRESSURE IN HPA 1037.0 1035.5 1041.0 1026.6 1023.9 1016.6 1009.3 1012.4 1017.5 1029.3 1034.1 1040.4 1041.0 YEAR-DAY 99- 2 97- 7 3- 2 97-12 3- 1 93-22 0-30 99-20 0-29 95-25 96-18 3-12 3- 2 MIN. QFF PRESSURE IN HPA 1005.5 1003.0 1001.4 1001.0 996.9 992.4 991.9 993.8 998.8 1004.1 1000.4 1001.2 991.9 YEAR-DAY 0-21 3-19 1-25 99- 8 1-29 99-24 0-11 97- 5 0- 3 3-29 1-18 2-21 0-11 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 784.4 783.3 783.6 785.2 786.6 785.5 784.7 786.2 788.0 789.7 788.2 786.3 786.0 MAX. QFE PRESSURE IN HPA 793.4 794.2 794.3 795.7 794.6 792.5 792.6 792.5 795.3 796.0 796.2 794.9 796.2 YEAR-DAY 94- 9 2- 6 90- 9 98-12 98- 8 93-22 0-30 99-19 94-23 93-17 3-25 93-26 3-25 MIN. QFE PRESSURE IN HPA 770.6 770.5 772.2 773.7 778.6 779.0 779.6 779.6 781.0 783.3 771.9 770.6 770.5 YEAR-DAY 3-28 1-21 3-26 2- 3 90-12 94-28 1-17 89- 1 96-21 99-31 1-18 2-21 1-21 MEAN QNH PRESSURE IN HPA 1017.2 1015.8 1016.2 1018.2 1020.0 1018.6 1017.6 1019.4 1021.6 1023.8 1021.9 1019.6 1019.1 MAX. QNH PRESSURE IN HPA 1028.3 1029.3 1029.4 1031.2 1029.8 1027.2 1027.3 1027.2 1030.7 1031.5 1031.8 1030.2 1031.8 YEAR-DAY 94- 9 2- 6 90- 9 98-12 98- 8 93-22 0-30 99-19 94-23 93-17 3-25 93-26 3-25 MIN. QNH PRESSURE IN HPA 1000.2 1000.0 1002.1 1004.0 1010.0 1010.5 1011.3 1011.3 1013.0 1015.9 1001.8 1000.2 1000.0 YEAR-DAY 3-28 1-21 3-26 2- 3 90-12 94-28 1-17 89- 1 96-21 99-31 1-18 2-21 1-21 MEAN QFF PRESSURE IN HPA 1022.6 1020.1 1015.7 1012.2 1009.6 1003.3 999.7 1001.0 1006.6 1014.0 1019.1 1022.6 1012.2 MAX. QFF PRESSURE IN HPA 1036.3 1035.8 1038.0 1025.9 1022.6 1016.1 1008.9 1013.3 1017.9 1025.9 1032.7 1038.5 1038.5 YEAR-DAY 99- 2 97- 7 3- 2 97-13 3- 1 93-22 0-30 99-19 0-29 95-26 96-18 2-14 2-14 MIN. QFF PRESSURE IN HPA 1003.1 1001.3 1000.5 1000.6 996.3 991.7 989.8 992.5 998.4 1005.4 1003.6 1001.5 989.8 YEAR-DAY 3-28 99-20 1-25 3-20 1-29 99-24 0-11 97- 4 95- 4 3-27 1-18 94- 3 0-11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1989-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 784.7 783.5 783.7 785.3 786.6 785.4 784.5 786.0 788.0 789.9 788.5 786.7 786.1 MAX. QFE PRESSURE IN HPA 793.4 793.8 794.3 795.1 794.1 792.2 791.8 792.2 795.1 796.0 796.3 795.2 796.3 YEAR-DAY 94- 9 98-22 90- 9 98-12 98- 8 93-22 0-30 99-19 94-23 93-17 90-22 93-26 90-22 MIN. QFE PRESSURE IN HPA 771.0 770.9 772.0 774.5 778.4 779.0 779.6 779.4 782.0 783.0 774.1 772.0 770.9 YEAR-DAY 92-30 99-20 91- 6 2- 3 97- 4 99-24 91-13 89- 1 96-21 99-31 1-18 2-21 99-20 MEAN QNH PRESSURE IN HPA 1017.6 1016.1 1016.3 1018.3 1019.9 1018.4 1017.3 1019.2 1021.7 1024.0 1022.3 1020.1 1019.3 MAX. QNH PRESSURE IN HPA 1028.3 1028.8 1029.4 1030.4 1029.2 1026.8 1026.3 1026.8 1030.4 1031.5 1031.9 1030.5 1031.9 YEAR-DAY 94- 9 98-22 90- 9 98-12 98- 8 93-22 0-30 99-19 94-23 93-17 90-22 93-26 90-22 MIN. QNH PRESSURE IN HPA 1000.7 1000.5 1001.9 1005.0 1009.8 1010.5 1011.3 1011.0 1014.2 1015.5 1004.5 1001.9 1000.5 YEAR-DAY 92-30 99-20 91- 6 2- 3 97- 4 99-24 91-13 89- 1 96-21 99-31 1-18 2-21 99-20 MEAN QFF PRESSURE IN HPA 1024.9 1022.5 1018.2 1013.6 1010.4 1003.8 999.4 1002.0 1009.1 1017.0 1021.4 1024.1 1013.9 MAX. QFF PRESSURE IN HPA 1041.6 1041.8 1041.8 1027.9 1022.1 1015.9 1008.4 1014.3 1020.6 1028.4 1036.0 1043.5 1043.5 YEAR-DAY 92- 9 98-22 3- 2 97-13 3- 1 93-22 0-30 92-31 94-22 90-15 96-18 90-27 90-27 MIN. QFF PRESSURE IN HPA 1005.6 1001.4 1002.3 1001.8 997.5 992.9 991.3 994.2 1000.0 1006.6 1007.2 1004.1 991.3 YEAR-DAY 3-28 99-20 0-24 94- 1 1-29 99-24 95-21 89- 1 95- 4 3-27 1-18 94- 3 95-21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 785.6 784.4 783.9 785.7 787.1 785.9 785.8 787.2 788.6 790.1 789.0 787.7 786.8 MAX. QFE PRESSURE IN HPA 793.6 794.6 793.7 794.8 794.1 792.5 792.5 793.2 793.9 796.3 796.9 795.4 796.9 YEAR-DAY 3-11 2- 5 2-11 1- 1 99-28 93-22 0-30 99-18 2-23 98-13 96-15 3-11 96-15 MIN. QFE PRESSURE IN HPA 773.6 772.3 772.6 775.3 779.5 779.0 779.8 782.6 781.8 782.5 775.9 772.7 772.3 YEAR-DAY 3-28 99-20 3-26 2- 3 97- 4 99-24 99-13 97- 5 96-21 3-28 1-18 94- 3 99-20 MEAN QNH PRESSURE IN HPA 1018.7 1017.3 1016.6 1018.8 1020.5 1019.1 1019.0 1020.7 1022.5 1024.3 1022.9 1021.3 1020.1 MAX. QNH PRESSURE IN HPA 1028.6 1029.8 1028.7 1030.0 1029.2 1027.2 1027.2 1028.1 1028.9 1031.9 1032.6 1030.8 1032.6 YEAR-DAY 3-11 2- 5 2-11 1- 1 99-28 93-22 0-30 99-18 2-23 98-13 96-15 3-11 96-15 MIN. QNH PRESSURE IN HPA 1003.9 1002.3 1002.6 1006.0 1011.2 1010.5 1011.5 1015.0 1014.0 1014.9 1006.7 1002.8 1002.3 YEAR-DAY 3-28 99-20 3-26 2- 3 97- 4 99-24 99-13 97- 5 96-21 3-28 1-18 94- 3 99-20 MEAN QFF PRESSURE IN HPA 1025.1 1022.5 1017.3 1013.7 1010.2 1003.8 1000.8 1002.3 1008.2 1015.7 1021.2 1025.0 1013.8 MAX. QFF PRESSURE IN HPA 1039.5 1038.2 1038.4 1026.6 1022.2 1016.8 1008.8 1012.9 1019.9 1029.2 1034.4 1041.4 1041.4 YEAR-DAY 96-25 97- 6 3- 1 97-12 3- 1 93-22 96- 3 96-29 97-14 95-25 96-18 3-11 3-11 MIN. QFF PRESSURE IN HPA 1005.8 1004.9 1000.5 1002.7 997.6 992.4 992.5 994.3 1001.2 1005.0 1004.8 1005.0 992.4 YEAR-DAY 97-15 99-20 1-24 3-20 1-29 99-24 0-10 95- 8 95- 4 3-28 1-17 94- 3 99-24 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 785.5 784.3 783.9 785.6 787.1 786.0 786.1 787.3 788.6 790.0 788.9 787.6 786.7 MAX. QFE PRESSURE IN HPA 793.6 794.9 794.5 794.8 794.2 792.6 793.0 793.4 793.4 796.1 796.9 794.9 796.9 YEAR-DAY 3-11 2- 5 2-11 1- 1 99-28 93-22 0-30 99-18 95-12 2-10 96-15 98- 9 96-15 MIN. QFE PRESSURE IN HPA 772.9 771.6 773.2 774.5 779.7 778.4 780.4 782.7 780.8 781.9 775.6 772.5 771.6 YEAR-DAY 97-15 3-18 3-26 2- 3 1- 8 99-24 99-13 0-30 96-21 3-28 1-17 94- 3 3-18 MEAN QNH PRESSURE IN HPA 1018.6 1017.1 1016.5 1018.7 1020.6 1019.2 1019.3 1020.9 1022.4 1024.2 1022.8 1021.1 1020.1 MAX. QNH PRESSURE IN HPA 1028.6 1030.2 1029.7 1030.0 1029.3 1027.3 1027.8 1028.3 1028.3 1031.6 1032.6 1030.2 1032.6 YEAR-DAY 3-11 2- 5 2-11 1- 1 99-28 93-22 0-30 99-18 95-12 2-10 96-15 98- 9 96-15 MIN. QNH PRESSURE IN HPA 1003.0 1001.4 1003.4 1005.0 1011.4 1009.8 1012.3 1015.1 1012.8 1014.1 1006.3 1002.5 1001.4 YEAR-DAY 97-15 3-18 3-26 2- 3 1- 8 99-24 99-13 0-30 96-21 3-28 1-17 94- 3 3-18 MEAN QFF PRESSURE IN HPA 1023.6 1021.0 1016.3 1012.9 1009.9 1003.7 1000.8 1002.0 1007.6 1014.8 1020.1 1023.5 1013.0 MAX. QFF PRESSURE IN HPA 1037.3 1034.3 1038.7 1026.9 1020.9 1016.9 1009.2 1012.1 1019.3 1028.9 1033.8 1040.9 1040.9 YEAR-DAY 96-25 97- 6 3- 1 97-12 93- 8 93-22 96- 3 96-29 97-14 95-25 96-17 3-11 3-11 MIN. QFF PRESSURE IN HPA 1003.1 1003.8 1000.0 1002.0 996.5 992.0 991.4 994.2 999.9 1002.7 1003.4 1003.7 991.4 YEAR-DAY 97-15 1-20 1-24 96-12 1-29 99-24 0-10 97- 4 96-21 3-28 1-17 2-20 0-10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 1 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 10.7 14.9 21.1 25.1 23.7 18.0 12.9 4.6 -0.2 ****** 1990 -6.9 -5.9 -0.0 6.7 14.2 20.6 23.7 23.0 20.1 10.8 7.3 -0.1 9.5 1991 -5.4 -6.3 0.5 9.1 12.7 19.8 23.8 23.8 18.6 10.9 5.3 -4.9 9.0 1992 -8.6 -7.0 -5.1 4.4 9.8 17.2 23.4 20.4 16.5 12.0 4.0 -4.1 6.9 1993 -6.0 -5.4 -1.4 7.2 10.0 16.4 20.5 19.9 17.5 10.0 0.0 -0.2 7.4 1994 -2.8 -3.1 1.7 10.0 13.4 18.7 23.3 23.2 16.6 10.0 3.2 -5.6 9.1 1995 -3.7 -3.5 1.1 5.9 12.6 17.2 22.7 22.5 16.2 8.7 2.8 -4.1 8.2 1996 -6.9 -2.7 -1.6 4.8 14.7 18.6 21.2 21.3 17.0 9.4 2.9 -0.3 8.2 1997 -4.7 -7.3 -3.4 4.6 11.4 17.7 21.1 22.7 15.1 12.5 3.3 -2.1 7.6 1998 -6.3 -5.4 -0.6 8.7 13.5 21.3 23.1 23.5 16.9 10.7 6.7 2.7 9.6 1999 -4.1 -1.7 1.2 7.2 13.6 19.0 20.6 22.1 16.5 11.0 2.0 -0.7 8.9 2000 -5.5 -5.1 -0.5 8.8 13.1 18.4 22.5 21.5 16.8 7.9 1.7 -2.1 8.1 2001 -4.5 -3.8 4.2 8.9 12.3 18.4 20.7 21.8 16.6 9.8 2.8 -1.1 8.8 2002 -6.1 -2.5 3.0 5.9 11.6 17.1 20.8 20.4 17.8 12.7 3.4 -4.8 8.3 2003 -4.0 -4.7 -1.8 7.0 11.5 17.1 21.8 21.8 16.4 12.4 2.4 -3.5 8.0 MEAN -5.4 -4.6 -0.2 7.3 12.6 18.6 22.3 22.1 17.1 10.8 3.5 -2.1 8.5 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 2 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 2.9 5.4 8.8 14.2 13.3 7.4 4.4 -0.1 -4.7 ****** 1990 -11.0 -10.5 -4.8 -0.4 4.4 9.2 13.5 11.3 8.6 3.3 0.4 -5.4 1.5 1991 -10.3 -11.3 -3.8 2.4 4.6 10.0 14.2 13.1 8.2 4.4 -0.9 -9.6 1.7 1992 -13.8 -11.7 -11.1 -0.8 4.1 8.4 12.5 11.3 6.4 2.6 -2.2 -9.5 -0.3 1993 -10.9 -11.8 -7.1 0.5 4.2 8.0 12.6 11.9 8.9 3.2 -4.2 -5.0 0.8 1994 -7.4 -7.9 -2.6 3.4 5.4 9.0 13.0 12.6 8.0 3.6 -0.3 -9.5 2.3 1995 -8.8 -8.0 -3.5 1.2 5.9 8.5 13.2 13.0 8.5 2.2 -2.2 -8.4 1.8 1996 -10.8 -6.4 -5.8 0.2 5.8 8.2 12.6 11.9 8.5 2.7 -2.4 -4.2 1.7 1997 -8.6 -13.1 -7.8 -0.5 5.3 9.4 12.3 13.6 6.8 4.8 -0.8 -6.3 1.2 1998 -11.1 -10.7 -5.0 2.4 5.6 10.4 12.9 14.1 8.8 3.8 1.3 -2.4 2.5 1999 -8.3 -6.4 -3.7 1.1 5.8 10.4 12.2 14.3 8.2 4.9 -2.0 -4.9 2.6 2000 -9.5 -9.9 -5.4 3.0 5.9 8.5 14.3 13.6 8.4 2.2 -2.3 -6.0 1.9 2001 -8.9 -9.2 -1.0 2.3 4.2 9.0 12.6 13.0 8.6 3.7 -2.3 -5.6 2.2 2002 -10.7 -6.8 -2.2 1.5 4.2 7.9 12.8 10.7 7.8 5.9 -0.9 -8.5 1.8 2003 -8.2 -9.5 -6.3 1.7 4.5 8.4 12.8 12.5 7.6 5.7 -2.2 -6.9 1.7 MEAN -9.9 -9.5 -5.0 1.4 5.0 8.9 13.1 12.7 8.0 3.8 -1.4 -6.5 1.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 3 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF MAXIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 15.4 19.4 26.0 31.0 29.5 23.9 18.1 8.2 3.1 ****** 1990 -3.3 -2.7 3.6 11.6 18.7 25.9 29.0 29.2 26.2 15.5 11.8 3.9 14.1 1991 -1.6 -2.3 4.0 13.3 17.3 24.9 29.7 30.6 24.8 15.1 9.9 -0.9 13.7 1992 -4.5 -3.5 -1.1 8.2 13.8 21.6 29.1 26.1 21.9 17.3 8.1 -0.9 11.3 1993 -2.8 -1.9 2.4 11.4 15.3 23.3 28.2 27.6 25.7 15.4 3.6 3.3 12.6 1994 0.8 0.3 4.9 14.4 17.7 23.7 29.3 29.2 21.8 15.1 7.8 -1.3 13.6 1995 1.8 1.4 6.5 11.4 16.7 21.5 29.2 31.0 23.8 16.1 8.8 1.0 14.1 1996 -3.0 1.3 2.6 9.9 19.0 24.0 28.4 29.0 24.5 16.0 8.8 4.3 13.7 1997 0.1 -1.7 0.5 9.8 17.5 24.7 28.9 31.1 22.5 17.1 6.8 1.8 13.3 1998 -2.9 -1.9 2.8 12.9 17.8 26.4 28.8 29.5 24.7 18.3 13.3 9.0 14.9 1999 1.1 3.1 6.6 13.7 20.7 26.1 28.0 29.8 24.3 18.0 7.5 4.2 15.3 2000 -1.5 -0.2 4.5 14.9 19.7 26.2 30.1 29.3 24.4 14.0 6.4 1.7 14.1 2001 -0.0 1.0 9.7 15.5 19.3 26.2 28.6 30.0 24.4 16.3 8.3 2.6 15.1 2002 -0.3 2.9 8.9 11.3 18.5 24.3 28.4 29.4 26.7 19.9 8.8 -1.2 14.8 2003 0.4 -0.4 2.5 13.1 18.4 24.4 29.7 29.8 24.7 19.4 7.9 0.1 14.2 MEAN -1.1 -0.3 4.2 12.4 18.0 24.6 29.1 29.4 24.3 16.8 8.4 2.0 14.0 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 4 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 12.5 14.0 17.2 16.8 16.2 16.5 13.7 8.3 7.8 ****** 1990 7.7 7.8 8.4 12.0 14.3 16.7 15.5 17.9 17.6 12.2 11.4 9.3 12.6 1991 8.7 9.0 7.8 10.9 12.7 14.9 15.5 17.5 16.6 10.7 10.8 8.7 12.0 1992 9.3 8.2 10.0 9.0 9.7 13.2 16.6 14.8 15.5 14.7 10.3 8.6 11.6 1993 8.1 9.9 9.5 10.9 11.1 15.3 15.6 15.7 16.8 12.2 7.8 8.3 11.8 1994 8.2 8.2 7.5 11.0 12.3 14.7 16.3 16.6 13.8 11.5 8.1 8.2 11.3 1995 10.6 9.4 10.0 10.2 10.8 13.0 16.0 18.0 15.3 13.9 11.0 9.4 12.3 1996 7.8 7.7 8.4 9.7 13.2 15.8 15.8 17.1 16.0 13.3 11.2 8.5 12.0 1997 8.7 11.4 8.3 10.3 12.2 15.3 16.6 17.5 15.7 12.3 7.6 8.1 12.1 1998 8.2 8.8 7.8 10.5 12.2 16.0 15.9 15.4 15.9 14.5 12.0 11.4 12.4 1999 9.4 9.5 10.3 12.6 14.9 15.7 15.8 15.5 16.1 13.1 9.5 9.1 12.7 2000 8.0 9.7 9.9 11.9 13.8 17.7 15.8 15.7 16.0 11.8 8.7 7.7 12.2 2001 8.9 10.2 10.7 13.2 15.1 17.2 16.0 17.0 15.8 12.6 10.6 8.2 12.9 2002 10.4 9.7 11.1 9.8 14.3 16.4 15.6 18.7 18.9 14.0 9.7 7.3 13.0 2003 8.6 9.1 8.8 11.4 13.9 16.0 16.9 17.3 17.1 13.7 10.1 7.0 12.5 MEAN 8.8 9.2 9.2 11.0 13.0 15.7 16.0 16.7 16.3 13.0 9.8 8.5 12.3 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 5 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF MEAN DAILY TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 9.1 12.4 17.4 22.6 21.4 15.7 11.2 4.1 -0.8 ****** 1990 -7.2 -6.6 -0.6 5.6 11.5 17.6 21.3 20.2 17.4 9.4 6.1 -0.8 7.8 1991 -5.9 -6.8 0.1 7.9 10.9 17.4 21.9 21.9 16.5 9.8 4.5 -5.2 7.7 1992 -9.1 -7.6 -6.1 3.7 8.9 15.0 20.8 18.7 14.2 10.0 3.0 -5.2 5.5 1993 -6.9 -6.9 -2.4 6.0 9.7 15.6 20.4 19.7 17.3 9.3 -0.3 -0.9 6.7 1994 -3.3 -3.8 1.2 8.9 11.5 16.4 21.1 20.9 14.9 9.4 3.7 -5.4 8.0 1995 -3.5 -3.3 1.5 6.3 11.3 15.0 21.2 22.0 16.1 9.2 3.3 -3.7 7.9 1996 -6.9 -2.5 -1.6 5.0 12.4 16.1 20.5 20.4 16.5 9.3 3.2 0.1 7.7 1997 -4.3 -7.4 -3.7 4.7 11.4 17.0 20.6 22.4 14.7 11.0 3.0 -2.3 7.3 1998 -7.0 -6.3 -1.1 7.6 11.7 18.4 20.9 21.8 16.7 11.1 7.3 3.3 8.7 1999 -3.6 -1.6 1.4 7.4 13.2 18.2 20.1 22.0 16.3 11.4 2.7 -0.3 8.9 2000 -5.5 -5.0 -0.4 9.0 12.8 17.4 22.2 21.4 16.4 8.1 2.0 -2.1 8.0 2001 -4.4 -4.1 4.3 8.9 11.7 17.6 20.6 21.5 16.5 10.0 3.0 -1.5 8.7 2002 -5.5 -2.0 3.3 6.4 11.3 16.1 20.6 20.1 17.2 12.9 3.9 -4.8 8.3 2003 -3.9 -4.9 -1.9 7.4 11.5 16.4 21.2 21.2 16.2 12.6 2.8 -3.4 7.9 MEAN -5.5 -4.9 -0.4 6.9 11.5 16.8 21.1 21.0 16.2 10.3 3.5 -2.2 7.9 SD 1.75 2.06 2.74 1.72 1.09 1.08 0.70 1.03 0.95 1.34 1.72 2.45 1.55 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 6 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M TEMPERATURE RECORDS LOWEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** -2.0 1.0 4.0 9.0 9.0 0.0 -2.0 -6.0 -9.5 ****** DAY ** ** ** 1 1 26 3 19 20 23 21 7 1990 -20.0 -16.0 -13.0 -5.0 0.0 4.0 8.0 7.5 5.0 -2.0 -6.5 -20.0 -20.0 DAY 11 24 17 3 4 18 1 24 20 16 14 27 1991 -18.5 -20.0 -14.0 -2.0 -1.0 4.4 9.0 8.8 2.2 -0.6 -7.6 -18.8 -20.0 DAY 16 5 11 12 5 1 8 24 27 30 27 17 1992 -21.6 -18.6 -20.6 -7.0 -0.8 4.2 7.2 5.4 0.0 -2.6 -15.6 -19.6 -21.6 DAY 4 16 11 3 2 5 12 12 30 8 27 27 1993 -19.6 -22.6 -16.0 -4.6 -2.5 3.0 8.0 8.4 4.2 -1.2 -16.5 -11.0 -22.6 DAY 20 16 13 23 6 22 5 24 30 8 15 13 1994 -14.0 -18.0 -9.0 -3.2 -0.4 4.0 5.8 7.6 4.2 0.6 -5.6 -17.8 -18.0 DAY 19 4 17 5 7 5 1 25 16 12 9 7 1995 -17.2 -14.0 -10.0 -2.6 0.0 5.4 7.6 8.0 1.0 -2.0 -11.8 -17.4 -17.4 DAY 23 25 1 6 8 1 11 26 22 14 26 20 1996 -23.0 -14.0 -14.0 -7.2 3.0 1.2 6.6 6.8 3.0 -5.0 -10.0 -10.4 -23.0 DAY 22 4 5 4 2 7 15 10 30 28 12 19 1997 -22.6 -22.0 -17.6 -12.4 0.6 4.0 8.0 8.8 0.8 -0.6 -4.6 -15.2 -22.6 DAY 29 6 9 12 5 3 6 31 15 30 29 28 1998 -17.6 -20.0 -12.2 -3.8 0.6 6.0 8.4 9.0 4.0 -0.8 -3.0 -8.6 -20.0 DAY 10 22 26 1 4 1 7 5 25 25 13 23 1999 -15.6 -12.0 -10.0 -3.0 -3.0 7.0 7.0 8.4 2.8 -0.6 -11.2 -10.8 -15.6 DAY 23 23 5 3 22 5 13 31 28 14 29 17 2000 -19.0 -17.8 -11.8 -3.6 0.6 2.0 11.0 4.0 4.4 -1.6 -6.6 -11.6 -19.0 DAY 18 3 1 11 11 13 4 31 27 29 27 23 2001 -16.6 -16.0 -8.0 -2.4 0.4 2.8 8.4 8.6 4.4 -3.0 -13.0 -16.4 -16.6 DAY 28 23 12 13 10 11 22 12 9 20 20 21 2002 -17.0 -12.6 -12.0 -2.0 0.0 3.0 9.0 7.0 -2.4 1.6 -6.8 -21.0 -21.0 DAY 19 5 1 1 8 3 1 23 10 31 30 14 2003 -18.0 -18.0 -21.0 -6.0 -2.6 3.6 9.0 8.4 2.4 -3.6 -7.8 -14.8 -21.0 DAY 18 28 2 2 9 2 1 3 21 31 23 22 1989-2003 -23.0 -22.6 -21.0 -12.4 -3.0 1.2 5.8 4.0 -2.4 -5.0 -16.5 -21.0 -23.0 YEAR-DAY 96-22 93-16 3- 2 97-12 99-22 96- 7 94- 1 0-31 2-10 96-28 93-15 2-14 96 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 7 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M TEMPERATURE RECORDS HIGHEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 19.8 25.2 32.0 34.5 32.2 31.5 24.5 14.0 10.0 ****** DAY ** ** ** 17 24 30 11 26 3 6 5 24 1990 3.5 2.0 8.5 21.2 25.0 29.0 32.5 34.5 29.0 21.5 18.9 13.0 34.5 DAY 31 27 31 27 24 24 16 14 15 11 4 2 1991 5.0 3.5 14.4 20.8 21.8 31.0 34.2 36.5 31.8 19.8 15.2 4.4 36.5 DAY 6 18 30 25 29 30 30 8 1 8 2 9 1992 0.8 1.4 6.2 13.8 23.2 29.0 31.8 30.0 26.0 21.4 15.2 4.4 31.8 DAY 21 18 30 30 29 30 25 5 2 3 20 12 1993 2.2 5.0 11.2 20.8 21.0 30.4 32.0 31.2 30.0 22.6 14.0 7.2 32.0 DAY 27 27 31 19 19 30 16 14 6 1 8 23 1994 5.8 6.0 15.0 21.0 24.8 28.0 33.4 32.0 26.0 19.6 14.2 4.8 33.4 DAY 3 27 31 21 31 11 30 1 12 13 3 27 1995 7.0 5.4 13.4 16.6 22.0 26.6 33.6 33.2 29.4 23.8 14.6 5.6 33.6 DAY 5 21 24 2 22 21 15 2 3 2 1 31 1996 5.6 9.0 8.6 17.4 24.2 29.0 30.6 32.6 29.0 22.0 15.0 11.6 32.6 DAY 1 25 29 30 27 30 20 12 15 1 2 5 1997 8.4 5.6 7.8 23.0 24.6 29.0 34.4 33.4 26.4 21.8 12.0 10.2 34.4 DAY 6 18 31 25 28 29 28 17 20 16 17 8 1998 2.4 4.4 8.8 21.0 25.4 31.0 35.0 33.0 32.4 23.4 16.8 17.0 35.0 DAY 17 6 12 15 28 27 12 28 1 4 6 10 1999 7.4 7.6 15.2 19.4 28.6 30.0 33.6 32.0 28.4 24.6 13.0 11.6 33.6 DAY 5 26 31 24 30 20 21 2 7 1 7 31 2000 11.0 3.8 12.0 20.4 24.4 33.0 33.0 32.0 31.0 20.0 11.6 7.0 33.0 DAY 1 23 22 14 25 30 10 2 9 11 12 29 2001 5.6 6.2 17.3 21.0 24.6 32.2 31.6 32.6 28.0 23.4 17.6 6.0 32.6 DAY 10 28 28 5 28 23 6 3 2 5 6 29 2002 5.8 7.0 16.8 19.6 24.6 28.8 30.6 32.6 31.0 25.6 15.2 5.8 32.6 DAY 26 6 13 28 28 27 19 11 3 1 10 7 2003 8.6 4.4 8.0 19.8 22.0 28.6 34.0 34.4 29.4 24.0 15.0 8.0 34.4 DAY 12 3 12 7 16 23 13 12 5 9 5 18 1989-2003 11.0 9.0 17.3 23.0 28.6 33.0 35.0 36.5 32.4 25.6 18.9 17.0 36.5 YEAR-DAY 0- 1 96-25 1-28 97-25 99-30 0-30 98-12 91- 8 98- 1 2- 1 90- 4 98-10 91 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 8 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M 0C COOLING DEGREE DAYS (BASE 21) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 0.0 0.0 0.5 51.4 32.6 2.0 0.0 0.0 0.0 ****** 1990 0.0 0.0 0.0 0.0 0.0 0.3 47.8 17.1 0.0 0.0 0.0 0.0 65.2 1991 0.0 0.0 0.0 0.0 0.0 2.0 43.5 42.6 2.3 0.0 0.0 0.0 90.5 1992 0.0 0.0 0.0 0.0 0.0 0.0 22.0 3.3 0.0 0.0 0.0 0.0 25.3 1993 0.0 0.0 0.0 0.0 0.0 0.0 10.9 1.3 0.4 0.0 0.0 0.0 12.6 1994 0.0 0.0 0.0 0.0 0.0 0.0 33.5 15.8 0.0 0.0 0.0 0.0 49.3 1995 0.0 0.0 0.0 0.0 0.0 0.0 36.7 42.6 0.0 0.0 0.0 0.0 79.3 1996 0.0 0.0 0.0 0.0 0.0 0.0 16.7 16.9 0.0 0.0 0.0 0.0 33.6 1997 0.0 0.0 0.0 0.0 0.0 0.8 26.8 48.7 0.0 0.0 0.0 0.0 76.3 1998 0.0 0.0 0.0 0.0 0.0 0.9 27.0 49.6 2.7 0.0 0.0 0.0 80.2 1999 0.0 0.0 0.0 0.0 0.0 0.5 22.3 44.5 0.0 0.0 0.0 0.0 67.3 2000 0.0 0.0 0.0 0.0 0.0 2.9 43.8 35.4 0.9 0.0 0.0 0.0 83.0 2001 0.0 0.0 0.0 0.0 0.0 6.9 21.8 38.4 0.0 0.0 0.0 0.0 67.1 2002 0.0 0.0 0.0 0.0 0.0 0.0 16.2 9.9 0.0 0.0 0.0 0.0 26.1 2003 0.0 0.0 0.0 0.0 0.0 0.1 26.2 23.5 0.0 0.0 0.0 0.0 49.8 MEAN 0.0 0.0 0.0 0.0 0.0 1.0 29.8 28.2 0.6 0.0 0.0 0.0 59.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 9 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M 0C HEATING DEGREE DAYS (BASE 18) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 265.5 167.7 32.4 0.0 1.5 96.1 209.8 417.9 582.9 ****** 1990 779.9 688.2 559.2 372.0 200.1 27.5 9.9 4.3 26.2 267.3 356.6 581.5 3872.8 1991 741.9 694.4 555.7 303.7 219.4 38.1 0.0 1.3 63.3 255.4 403.8 720.5 3997.7 1992 841.6 743.1 747.8 428.7 280.7 96.6 4.8 25.8 115.0 249.2 451.3 719.4 4704.0 1993 771.4 695.9 631.4 361.4 255.8 78.7 1.8 1.9 34.3 269.3 549.6 584.7 4236.3 1994 660.2 609.7 522.1 272.9 201.2 56.5 6.3 1.3 94.3 267.4 428.1 725.7 3845.7 1995 666.4 596.3 512.2 351.9 207.4 92.2 3.9 0.0 76.8 274.2 440.8 672.2 3894.3 1996 772.2 595.7 607.9 389.6 172.8 63.5 3.5 2.1 51.0 268.7 443.4 556.0 3926.2 1997 691.0 711.6 671.2 400.0 204.8 45.0 6.4 0.0 99.8 217.9 450.8 628.9 4127.4 1998 775.1 680.1 592.9 311.0 194.3 18.6 1.2 2.9 50.6 215.4 322.2 456.9 3621.2 1999 669.2 549.7 513.9 317.9 151.8 17.8 12.8 0.3 61.4 203.2 458.2 568.3 3524.4 2000 728.4 668.4 571.8 271.4 160.8 38.2 0.0 3.4 56.9 307.3 479.0 623.8 3909.5 2001 695.3 619.3 423.3 272.2 194.5 47.4 5.4 1.5 51.5 246.6 450.2 605.3 3612.6 2002 729.3 558.8 454.7 347.7 207.0 68.1 1.3 1.7 31.5 158.6 421.7 707.7 3688.1 2003 679.8 642.4 616.2 318.4 202.5 59.1 0.5 0.0 69.5 168.8 454.8 662.7 3874.7 MEAN 728.7 646.7 570.0 332.3 201.4 52.0 3.9 3.2 65.2 238.6 435.2 626.4 3903.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 10 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** ***** ***** -4.1 0.7 -0.1 -4.7 -3.2 -1.4 -4.8 ****** 1990 -10.3 -8.4 -4.5 -2.6 -2.7 -1.6 3.7 0.3 -5.3 -2.0 -4.0 -7.6 -3.8 1991 -10.1 -11.1 -4.1 -1.2 -2.3 2.2 3.0 1.7 -2.3 1.9 -2.8 -10.0 -2.9 1992 -14.0 -11.2 -9.9 -2.6 2.6 3.1 2.2 3.7 -1.9 -2.4 -3.6 -8.1 -3.5 1993 -9.5 -9.0 -6.3 -1.2 3.2 2.1 2.9 4.9 2.0 -2.1 -2.4 -4.6 -1.7 1994 -5.8 -7.2 -2.8 0.5 1.3 2.2 6.1 3.5 -0.0 2.0 -0.8 -9.5 -0.9 1995 -7.3 -6.7 -4.0 0.6 4.2 5.5 5.8 2.3 1.7 -2.5 -6.9 -10.2 -1.4 1996 -10.7 -6.5 -5.6 -1.8 3.5 4.1 6.0 3.6 2.1 -0.4 -6.0 -5.8 -1.5 1997 -11.0 -14.4 -9.3 -4.3 1.6 3.1 4.4 2.3 -1.3 2.0 -0.5 -6.5 -2.8 1998 -10.2 -9.6 -4.8 -0.6 2.7 4.1 6.3 3.9 0.5 -4.6 -3.4 -6.3 -1.8 1999 -7.7 -7.2 -5.4 -2.8 -2.0 -0.5 3.0 2.4 -1.2 -2.2 -4.3 -6.8 -2.9 2000 -9.4 -10.3 -6.1 -0.8 -0.6 -0.9 1.5 0.7 -2.2 -0.5 -2.2 -6.2 -3.1 2001 -7.7 -6.6 -3.0 -2.2 -2.7 -2.4 3.0 -2.1 -1.6 -1.4 -3.5 -4.1 -2.9 2002 -9.8 -7.2 -4.9 -0.0 -0.5 -1.4 3.1 -0.2 -5.4 -2.3 -3.4 -7.2 -3.3 2003 -7.5 -8.2 -5.3 -0.1 0.6 1.7 3.0 1.1 -2.3 -2.1 -3.8 -6.8 -2.5 MEAN -9.4 -8.8 -5.4 -1.4 0.6 1.2 3.7 1.9 -1.5 -1.3 -3.3 -7.0 -2.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 11 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** ***** ***** 3.75 5.43 5.24 3.58 3.98 4.63 3.56 ***** 1990 2.38 2.67 3.63 4.17 4.30 4.62 6.59 5.28 3.54 4.41 3.77 3.04 4.03 1991 2.38 2.30 3.78 4.63 4.30 5.90 6.21 5.76 4.28 5.71 4.07 2.47 4.32 1992 1.81 2.24 2.51 4.13 6.01 6.24 5.91 6.67 4.32 4.19 3.93 2.85 4.23 1993 2.49 2.63 3.15 4.58 6.28 5.79 6.21 7.05 6.01 4.26 4.34 3.58 4.70 1994 3.30 2.99 4.07 5.19 5.48 5.83 7.71 6.58 5.01 5.78 4.75 2.59 4.94 1995 2.98 3.08 3.73 5.25 6.70 7.32 7.68 5.98 5.58 4.13 3.22 2.35 4.83 1996 2.32 3.10 3.32 4.37 6.35 6.71 7.63 6.51 5.76 4.86 3.27 3.28 4.79 1997 2.27 1.82 2.58 3.71 5.58 6.26 7.09 5.95 4.54 5.70 4.75 3.08 4.44 1998 2.35 2.47 3.54 4.78 6.04 6.66 7.98 6.57 5.15 3.59 3.92 3.15 4.68 1999 2.85 2.96 3.35 4.12 4.34 4.83 6.31 6.04 4.61 4.29 3.66 3.06 4.20 2000 2.55 2.36 3.26 4.78 4.82 4.75 5.81 5.46 4.37 4.83 4.21 3.24 4.20 2001 2.82 3.10 4.00 4.31 4.25 4.29 6.35 4.49 4.58 4.59 3.89 3.81 4.21 2002 2.55 2.98 3.56 4.99 4.82 4.52 6.35 5.19 3.41 4.29 3.91 3.05 4.14 2003 2.86 2.77 3.44 5.00 5.31 5.67 6.39 5.48 4.30 4.38 3.82 3.16 4.38 MEAN 2.56 2.68 3.42 4.57 5.33 5.54 6.64 5.88 4.60 4.60 4.01 3.08 4.41 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 12 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** ***** ***** 4.71 6.80 6.56 4.50 5.03 5.82 4.46 ***** 1990 2.98 3.34 4.56 5.21 5.40 5.78 8.23 6.61 4.45 5.56 4.75 3.83 5.06 1991 2.99 2.89 4.73 5.80 5.38 7.38 7.75 7.21 5.39 7.19 5.12 3.10 5.41 1992 2.27 2.79 3.14 5.17 7.52 7.80 7.38 8.35 5.44 5.28 4.95 3.57 5.31 1993 3.13 3.30 3.95 5.74 7.86 7.25 7.77 8.83 7.53 5.39 5.45 4.51 5.89 1994 4.15 3.74 5.10 6.51 6.88 7.28 9.59 8.21 6.31 7.29 5.96 3.25 6.19 1995 3.74 3.86 4.68 6.57 8.40 9.14 9.54 7.48 7.01 5.21 4.05 2.96 6.05 1996 2.91 3.89 4.15 5.48 7.96 8.39 9.54 8.16 7.23 6.11 4.13 4.13 6.01 1997 2.85 2.28 3.22 4.65 7.00 7.82 8.82 7.45 5.71 7.18 5.98 3.87 5.57 1998 2.94 3.10 4.43 5.99 7.57 8.35 9.93 8.24 6.48 4.54 4.95 3.97 5.87 1999 3.58 3.71 4.20 5.16 5.45 6.05 7.87 7.56 5.79 5.40 4.61 3.86 5.27 2000 3.19 2.96 4.08 5.99 6.04 5.95 7.26 6.84 5.49 6.07 5.30 4.07 5.27 2001 3.55 3.89 5.02 5.41 5.32 5.37 7.93 5.65 5.76 5.79 4.89 4.79 5.28 2002 3.20 3.74 4.46 6.23 6.03 5.67 7.95 6.50 4.31 5.41 4.93 3.83 5.19 2003 3.59 3.46 4.31 6.26 6.67 7.09 7.97 6.87 5.41 5.51 4.81 3.97 5.49 MEAN 3.22 3.35 4.29 5.73 6.68 6.94 8.29 7.37 5.79 5.80 5.05 3.88 5.53 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 13 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** ***** ***** 22.19 26.28 23.92 17.69 10.70 2.90 1.71 ***** 1990 0.83 0.71 1.77 5.25 11.65 19.41 22.37 22.95 20.30 8.05 5.92 2.90 10.17 1991 1.24 1.18 2.03 6.45 9.89 16.49 22.89 23.81 17.35 6.27 4.09 1.36 9.42 1992 1.09 0.97 1.33 3.51 5.19 12.48 22.69 16.77 14.32 9.35 3.78 1.14 7.72 1993 0.90 1.02 1.85 4.83 4.93 12.43 17.35 15.26 13.48 7.45 1.05 1.63 6.85 1994 0.98 1.24 2.08 6.34 9.32 15.28 20.39 21.56 13.39 5.39 1.92 0.99 8.24 1995 1.08 0.99 2.15 3.07 6.80 11.16 19.33 21.22 12.73 6.70 3.94 1.76 7.58 1996 1.00 1.29 1.40 3.51 9.43 13.89 16.55 18.37 13.13 6.28 3.76 2.05 7.56 1997 1.78 1.50 1.73 4.80 7.16 13.38 17.48 21.42 12.34 7.92 1.94 1.58 7.75 1998 0.97 1.19 1.56 5.96 8.70 18.01 19.40 22.02 13.82 9.09 5.23 3.79 9.14 1999 1.10 1.84 2.69 5.48 11.06 16.82 17.63 20.22 14.05 8.49 2.83 2.14 8.70 2000 1.13 1.38 2.13 5.74 9.72 16.48 21.13 19.94 14.71 5.04 1.76 1.26 8.37 2001 0.97 0.85 3.63 6.48 9.79 17.21 17.75 21.86 14.10 6.97 3.09 0.98 8.64 2002 0.90 1.53 3.48 3.38 8.41 14.80 17.68 18.87 17.30 10.12 3.20 0.66 8.36 2003 1.17 0.99 1.25 4.22 7.49 13.47 19.20 20.53 14.35 9.56 2.83 0.98 8.00 MEAN 1.08 1.19 2.08 4.93 8.54 15.57 19.87 20.58 14.87 7.82 3.22 1.66 8.45 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 14 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** *** *** 21 23 25 26 38 69 74 *** 1990 78 83 74 58 37 26 31 27 20 47 49 61 49 1991 72 70 74 53 39 34 29 27 28 58 59 69 51 1992 67 73 70 63 64 43 28 38 31 40 62 75 55 1993 78 76 71 60 66 42 35 40 38 47 86 74 59 1994 81 75 73 55 46 36 35 30 35 62 77 77 57 1995 78 80 71 73 60 50 36 29 41 49 52 65 57 1996 75 76 76 66 50 42 39 33 39 53 55 68 56 1997 64 59 66 56 54 40 38 29 36 52 78 73 54 1998 76 74 75 56 52 35 38 31 36 39 54 57 52 1999 78 68 64 54 38 30 36 31 34 45 66 66 51 2000 77 69 68 55 43 31 29 29 32 61 78 77 54 2001 80 83 64 51 41 28 36 24 34 51 68 82 54 2002 77 72 62 70 49 31 35 30 23 41 66 84 53 2003 78 78 78 65 52 39 33 28 32 41 67 79 56 MEAN 76 74 70 60 49 35 33 30 32 48 66 72 54 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 15 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** *** *** 40 40 44 45 57 87 88 *** 1990 86 90 85 81 60 48 51 45 35 69 70 75 66 1991 79 78 83 74 60 54 48 48 46 76 80 77 67 1992 75 80 78 79 82 68 46 58 52 59 76 82 70 1993 84 84 81 80 84 62 53 59 58 64 93 83 74 1994 88 84 83 73 67 54 54 45 51 81 90 88 72 1995 87 89 86 92 80 74 55 46 58 69 68 77 73 1996 83 85 86 83 72 61 57 47 55 73 73 82 71 1997 77 71 78 72 76 61 57 43 56 69 89 84 69 1998 83 81 82 76 78 59 62 53 56 59 73 76 70 1999 89 81 81 80 62 48 56 50 54 63 82 79 69 2000 87 82 82 78 65 52 45 45 53 79 91 88 71 2001 88 91 82 72 64 48 57 42 56 72 87 91 71 2002 87 85 78 87 72 50 56 52 37 60 83 91 70 2003 87 89 90 84 77 61 53 46 53 60 83 89 73 MEAN 84 84 83 79 71 56 53 48 51 67 82 83 70 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 16 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** *** *** 11 13 14 15 25 51 61 *** 1990 70 75 62 40 23 15 20 15 13 33 34 48 37 1991 64 62 64 38 28 22 17 15 16 44 40 61 39 1992 58 67 62 51 51 29 17 26 20 28 48 69 44 1993 70 68 60 45 45 27 20 25 24 34 77 65 47 1994 72 67 64 43 34 26 24 20 25 43 61 63 45 1995 65 68 55 53 47 36 24 16 25 31 36 52 42 1996 65 65 60 46 37 28 25 22 26 36 38 56 42 1997 50 47 54 40 35 26 22 16 21 41 66 63 40 1998 68 66 68 42 36 23 24 20 20 23 34 38 39 1999 65 52 46 31 19 17 21 17 18 28 47 53 35 2000 64 56 52 34 25 17 17 16 17 41 58 65 39 2001 71 72 44 31 23 15 19 11 18 31 47 72 38 2002 66 59 42 50 27 18 18 13 12 23 46 74 37 2003 69 66 64 44 30 22 18 15 15 24 49 68 40 MEAN 66 64 57 42 33 22 20 17 19 32 49 61 40 RH=0 =====> RELATIVE HUMIDITY < 0.5% =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 17 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF RELATIVE HUMIDITY AT 03 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** *** *** 40 40 42 45 56 76 82 *** 1990 82 87 81 78 60 45 49 45 34 66 65 67 63 1991 74 75 76 73 60 54 47 48 45 76 79 71 65 1992 70 76 74 74 81 67 46 57 51 58 71 79 67 1993 79 79 75 78 79 58 50 55 54 61 90 77 70 1994 83 76 78 72 68 53 54 44 51 78 83 77 68 1995 82 84 80 87 80 74 55 45 55 64 60 70 70 1996 78 77 79 78 71 60 54 46 52 69 69 72 67 1997 66 63 70 65 71 58 54 41 53 68 87 78 65 1998 78 76 80 74 77 59 62 53 54 54 65 70 67 1999 82 71 75 76 53 46 54 46 52 59 76 70 63 2000 80 70 75 70 60 51 41 43 49 76 86 80 65 2001 83 84 75 68 61 45 54 40 52 66 77 83 66 2002 79 76 72 81 68 48 54 50 36 55 78 86 65 2003 83 81 84 78 71 59 52 46 51 55 78 81 68 MEAN 79 77 77 75 69 54 51 47 49 64 76 76 66 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 18 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF RELATIVE HUMIDITY AT 09 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** *** *** 15 18 20 19 30 65 65 *** 1990 74 80 70 50 30 18 25 22 15 37 37 56 43 1991 70 66 71 47 32 27 23 21 21 51 48 66 45 1992 62 71 66 58 59 34 23 32 25 33 54 72 49 1993 75 74 68 54 53 30 25 30 32 38 86 74 53 1994 80 72 71 51 41 30 31 27 30 52 68 73 52 1995 72 74 63 61 53 41 31 22 32 35 42 58 49 1996 73 75 71 54 44 34 32 28 30 43 45 62 49 1997 58 54 62 47 41 30 30 22 26 43 72 68 46 1998 72 71 72 48 42 29 31 24 26 27 41 46 44 1999 74 66 52 37 24 20 26 20 22 33 55 59 41 2000 73 61 61 40 31 22 21 21 22 49 66 70 45 2001 76 79 51 35 26 18 26 16 23 39 55 80 44 2002 71 64 48 57 33 21 24 20 14 26 53 83 43 2003 75 73 71 48 36 27 24 21 21 28 56 77 46 MEAN 72 70 64 49 39 26 26 23 24 38 56 67 46 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 19 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF RELATIVE HUMIDITY AT 15 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** *** *** 14 15 17 19 35 71 77 *** 1990 80 84 74 54 29 18 26 17 16 48 51 65 47 1991 73 72 76 50 34 27 22 18 21 55 56 69 48 1992 69 73 71 62 61 35 20 30 26 36 65 75 52 1993 79 77 71 57 57 30 23 29 29 44 85 73 55 1994 82 78 73 49 38 30 26 22 27 54 76 77 53 1995 78 78 67 66 55 43 27 18 32 42 48 65 52 1996 73 76 73 59 46 32 29 24 31 45 47 66 50 1997 63 57 63 50 43 30 26 20 26 53 79 76 49 1998 77 77 75 54 47 28 29 23 25 32 50 49 47 1999 74 66 54 41 30 20 24 23 23 41 63 67 44 2000 78 72 64 44 33 20 21 19 21 54 77 77 48 2001 81 84 58 41 30 18 22 14 24 44 68 83 47 2002 78 73 59 65 35 21 22 15 16 38 63 84 47 2003 78 78 75 57 38 26 21 17 21 35 65 79 49 MEAN 76 75 68 54 41 26 24 20 24 44 64 72 49 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 20 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH MAXIMUM TEMPERATURE EQUAL 30 AND ABOVE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 0 0 3 23 19 3 0 0 0 *** 1990 0 0 0 0 0 0 17 16 0 0 0 0 33 1991 0 0 0 0 0 1 16 20 4 0 0 0 41 1992 0 0 0 0 0 0 15 3 0 0 0 0 18 1993 0 0 0 0 0 1 5 3 1 0 0 0 10 1994 0 0 0 0 0 0 12 11 0 0 0 0 23 1995 0 0 0 0 0 0 16 24 0 0 0 0 40 1996 0 0 0 0 0 0 6 11 0 0 0 0 17 1997 0 0 0 0 0 0 14 27 0 0 0 0 41 1998 0 0 0 0 0 3 10 18 1 0 0 0 32 1999 0 0 0 0 0 1 11 18 0 0 0 0 30 2000 0 0 0 0 0 4 17 15 2 0 0 0 38 2001 0 0 0 0 0 7 10 22 0 0 0 0 39 2002 0 0 0 0 0 0 8 12 2 0 0 0 22 2003 0 0 0 0 0 0 13 12 0 0 0 0 25 MEAN 0.0 0.0 0.0 0.0 0.0 1.3 12.9 15.4 0.9 0.0 0.0 0.0 30.5 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 21 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH MAXIMUM TEMPERATURE EQUAL 00 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 0 0 0 0 0 0 0 0 6 *** 1990 27 24 6 0 0 0 0 0 0 0 0 11 68 1991 24 16 8 0 0 0 0 0 0 0 0 21 69 1992 29 25 20 0 0 0 0 0 0 0 3 21 98 1993 26 18 10 0 0 0 0 0 0 0 8 3 65 1994 14 13 5 0 0 0 0 0 0 0 0 20 52 1995 8 10 0 0 0 0 0 0 0 0 2 13 33 1996 23 11 5 2 0 0 0 0 0 0 0 1 42 1997 16 21 14 3 0 0 0 0 0 0 0 8 62 1998 28 20 5 0 0 0 0 0 0 0 0 0 53 1999 12 4 1 0 0 0 0 0 0 0 4 4 25 2000 22 17 5 0 0 0 0 0 0 0 0 12 56 2001 15 10 0 0 0 0 0 0 0 0 1 7 33 2002 18 6 0 0 0 0 0 0 0 0 1 20 45 2003 16 17 6 0 0 0 0 0 0 0 1 15 55 MEAN 19.9 15.1 6.1 0.3 0.0 0.0 0.0 0.0 0.0 0.0 1.3 10.8 53.5 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 22 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL 21 AND ABOVE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 0 0 0 0 0 0 0 0 0 *** 1990 0 0 0 0 0 0 0 0 0 0 0 0 0 1991 0 0 0 0 0 0 0 0 0 0 0 0 0 1992 0 0 0 0 0 0 0 0 0 0 0 0 0 1993 0 0 0 0 0 0 0 0 0 0 0 0 0 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 0 0 0 0 0 0 0 0 0 0 0 0 0 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 0 0 0 0 0 0 0 1 0 0 0 0 1 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.1 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 23 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL -4 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 0 0 0 0 0 0 0 3 22 *** 1990 30 28 18 6 0 0 0 0 0 0 3 18 103 1991 29 24 16 0 0 0 0 0 0 0 6 24 99 1992 31 27 24 7 0 0 0 0 0 0 8 27 124 1993 31 26 24 1 0 0 0 0 0 0 13 22 117 1994 24 27 10 0 0 0 0 0 0 0 3 25 89 1995 28 23 12 0 0 0 0 0 0 0 8 31 102 1996 25 21 20 2 0 0 0 0 0 1 10 14 93 1997 23 28 26 7 0 0 0 0 0 0 2 22 108 1998 31 26 19 0 0 0 0 0 0 0 0 12 88 1999 25 21 16 0 0 0 0 0 0 0 8 17 87 2000 25 28 19 0 0 0 0 0 0 0 11 21 104 2001 30 28 7 0 0 0 0 0 0 0 8 22 95 2002 27 23 10 0 0 0 0 0 0 0 3 22 85 2003 26 27 23 2 0 0 0 0 0 0 10 20 108 MEAN 27.5 25.5 17.4 1.7 0.0 0.0 0.0 0.0 0.0 0.1 6.4 21.3 99.9 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 24 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL 00 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 4 0 0 0 0 1 4 18 31 *** 1990 31 28 31 18 4 0 0 0 0 4 16 24 156 1991 31 28 24 9 5 0 0 0 0 1 19 30 147 1992 31 29 31 16 3 0 0 0 1 5 18 31 165 1993 31 28 31 13 5 0 0 0 0 2 24 30 164 1994 27 28 25 3 1 0 0 0 0 0 17 31 132 1995 31 28 30 10 2 0 0 0 0 8 21 31 161 1996 31 29 31 15 0 0 0 0 0 7 24 28 165 1997 31 28 31 14 0 0 0 0 0 2 20 30 156 1998 31 28 29 7 0 0 0 0 0 3 11 24 133 1999 31 28 30 14 2 0 0 0 0 1 24 31 161 2000 31 29 28 2 0 0 0 0 0 3 25 30 148 2001 31 28 19 4 0 0 0 0 0 4 19 28 133 2002 29 28 24 12 1 0 0 0 1 0 21 30 146 2003 31 28 30 8 4 0 0 0 0 1 23 31 156 MEAN 30.6 28.2 28.1 9.9 1.8 0.0 0.0 0.0 0.2 3.0 20.0 29.3 151.1 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 25 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MONTHLY TOTAL OF PRECIPITATION IN MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 18.3 7.8 0.0 0.0 0.0 0.0 63.4 16.7 21.1 ****** 1990 36.7 38.6 61.1 66.9 9.4 0.0 0.0 0.0 0.0 38.8 23.0 17.5 292.0 1991 47.7 50.1 67.9 64.5 8.0 9.6 0.0 0.7 0.0 52.7 6.0 100.5 407.7 1992 39.0 75.4 61.2 87.7 70.4 19.5 0.0 13.9 0.2 0.0 60.8 23.4 451.5 1993 40.7 39.5 61.1 81.1 67.5 6.6 21.8 2.2 0.0 39.7 214.9 41.4 616.5 1994 63.2 45.5 38.2 88.8 22.2 5.0 0.0 0.0 11.6 38.1 154.9 39.9 507.4 1995 38.0 40.3 28.9 133.7 94.2 64.6 0.7 0.0 1.0 1.5 26.7 6.3 435.9 1996 52.7 60.7 68.5 110.7 20.1 0.3 1.2 0.0 0.7 22.8 3.2 29.9 370.8 1997 47.8 9.7 41.9 88.9 38.5 5.0 4.8 0.0 0.0 17.0 99.8 37.3 390.7 1998 73.4 23.5 140.8 92.0 69.6 2.0 9.3 0.0 0.0 2.7 13.6 3.5 430.4 1999 54.6 41.4 34.3 33.2 9.3 0.3 14.3 4.0 0.0 13.0 32.8 28.4 265.6 2000 27.7 29.9 67.0 54.5 19.8 0.4 8.0 0.5 9.5 52.5 15.6 44.6 330.0 2001 26.6 21.1 43.4 31.8 21.0 2.0 7.8 1.3 11.3 25.3 31.9 62.6 286.1 2002 63.9 15.7 63.6 56.1 20.9 0.0 22.2 0.0 0.0 25.2 34.2 119.3 421.1 2003 28.0 102.9 71.0 74.4 26.9 7.5 0.0 0.4 0.0 6.1 44.2 61.1 422.5 MEAN 45.7 42.4 60.6 72.2 33.7 8.2 6.0 1.5 2.3 26.6 51.9 42.5 393.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 26 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M GREATEST DAILY OF PRECIPITATION IN MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 8.0 3.0 0.0 0.0 0.0 0.0 53.0 7.0 13.5 ****** DAY ** ** ** 27 4 ** ** ** ** 30 12 1 1990 6.0 13.0 14.0 30.0 4.0 0.0 0.0 0.0 0.0 13.0 10.0 10.0 30.0 DAY 28 10 11 2 11 ** ** ** ** 29 12 25 1991 18.0 13.0 21.0 40.0 4.0 4.0 0.0 0.7 0.0 12.5 3.0 34.0 40.0 DAY 14 26 24 4 16 14 ** 14 ** 15 5 12 1992 7.0 30.0 13.0 47.0 12.0 9.0 0.0 8.0 0.2 0.0 44.0 11.0 47.0 DAY 3 24 10 18 6 2 ** 29 13 ** 8 3 1993 23.0 12.0 16.0 23.0 23.0 6.0 8.0 0.9 0.0 34.0 54.0 17.0 54.0 DAY 8 3 8 7 6 1 13 3 ** 29 2 15 1994 10.2 22.0 13.0 45.0 9.8 3.0 0.0 0.0 7.0 9.6 29.2 13.0 45.0 DAY 23 28 12 26 4 4 ** ** 7 31 7 29 1995 19.0 16.0 10.0 34.0 30.0 20.0 0.7 0.0 1.0 1.2 14.8 2.2 34.0 DAY 12 5 25 12 5 4 24 ** 20 24 3 11 1996 13.0 15.8 12.0 52.0 5.0 0.3 0.5 0.0 0.7 9.0 2.0 8.0 52.0 DAY 6 2 2 13 5 27 7 ** 3 13 7 14 1997 27.0 2.6 18.0 32.0 23.4 3.0 4.8 0.0 0.0 7.0 28.0 18.0 32.0 DAY 10 26 29 5 4 6 4 ** ** 21 3 9 1998 14.0 6.4 56.0 35.0 20.0 0.9 7.0 0.0 0.0 2.7 10.0 2.3 56.0 DAY 26 8 18 4 13 4 30 ** ** 10 16 27 1999 23.0 16.4 16.7 15.0 5.1 0.3 8.0 3.0 0.0 6.0 14.0 8.9 23.0 DAY 9 18 21 1 4 8 15 18 ** 31 8 10 2000 7.2 14.4 34.0 16.0 8.9 0.4 4.0 0.5 7.6 16.0 4.5 13.0 34.0 DAY 6 25 24 3 19 1 4 10 29 16 6 24 2001 7.1 4.4 17.0 11.0 19.0 2.0 2.0 1.0 4.0 13.0 10.0 12.3 19.0 DAY 26 21 9 8 2 16 17 11 21 1 12 19 2002 22.0 5.1 18.0 21.0 6.0 0.0 18.0 0.0 0.0 7.0 14.0 37.0 37.0 DAY 7 14 17 2 9 ** 22 ** ** 30 25 9 2003 8.0 27.0 24.6 25.0 7.0 7.3 0.0 0.3 0.0 3.0 17.1 10.0 27.0 DAY 28 4 26 27 18 1 ** 22 ** 29 11 19 1989-2003 27.0 30.0 56.0 52.0 30.0 20.0 18.0 8.0 7.6 53.0 54.0 37.0 56.0 YEAR-DAY 97-10 92-24 98-18 96-13 95- 5 95- 4 2-22 92-29 0-29 89-30 93- 2 2- 9 98 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 27 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH PRECIPITATION EQUAL TO OR GREATER THAN 10 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 0 0 0 0 0 0 2 0 1 *** 1990 0 1 2 2 0 0 0 0 0 1 1 1 8 1991 2 2 2 2 0 0 0 0 0 2 0 2 12 1992 0 1 3 3 2 0 0 0 0 0 1 1 11 1993 1 1 2 3 2 0 0 0 0 1 5 2 17 1994 3 1 1 3 0 0 0 0 0 0 7 1 16 1995 1 2 1 5 4 3 0 0 0 0 1 0 17 1996 1 2 2 3 0 0 0 0 0 0 0 0 8 1997 1 0 1 3 1 0 0 0 0 0 4 1 11 1998 2 0 3 3 2 0 0 0 0 0 1 0 11 1999 1 2 1 1 0 0 0 0 0 0 1 0 6 2000 0 1 2 3 0 0 0 0 0 2 0 2 10 2001 0 0 1 1 1 0 0 0 0 1 1 2 7 2002 1 0 2 1 0 0 1 0 0 0 1 4 10 2003 0 3 2 2 0 0 0 0 0 0 2 1 10 MEAN 0.9 1.1 1.8 2.3 0.8 0.2 0.1 0.0 0.0 0.6 1.7 1.2 10.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 28 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH PRECIPITATION EQUAL TO OR GREATER THAN 5 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 1 0 0 0 0 0 2 2 2 *** 1990 2 3 4 2 0 0 0 0 0 4 3 1 19 1991 3 5 5 3 0 0 0 0 0 5 0 5 26 1992 3 6 7 3 8 2 0 2 0 0 3 1 35 1993 3 3 5 7 5 1 3 0 0 1 7 3 38 1994 5 1 2 4 2 0 0 0 1 3 9 2 29 1995 2 3 3 9 7 4 0 0 0 0 3 0 31 1996 3 4 5 6 1 0 0 0 0 2 0 2 23 1997 3 0 1 6 1 0 0 0 0 2 5 2 20 1998 5 1 4 6 6 0 1 0 0 0 1 0 24 1999 4 3 2 3 1 0 2 0 0 1 2 1 19 2000 2 2 4 4 2 0 0 0 1 3 0 3 21 2001 1 0 4 3 1 0 0 0 0 3 3 5 20 2002 5 1 4 5 2 0 1 0 0 3 2 5 28 2003 2 5 4 4 3 1 0 0 0 0 4 4 27 MEAN 3.1 2.6 3.9 4.4 2.6 0.5 0.5 0.1 0.1 1.9 2.9 2.4 25.0 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 29 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH PRECIPITATION EQUAL TO OR GREATER THAN 1 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 4 2 0 0 0 0 2 5 4 *** 1990 12 7 9 6 3 0 0 0 0 6 3 4 50 1991 8 6 12 4 3 2 0 0 0 7 3 12 57 1992 11 13 8 9 12 3 0 2 0 0 5 5 68 1993 5 7 11 10 9 1 3 0 0 3 13 5 67 1994 12 11 7 8 4 3 0 0 3 8 12 9 77 1995 5 5 6 11 12 7 0 0 1 1 4 4 56 1996 11 7 13 9 7 0 0 0 0 4 2 7 60 1997 6 4 9 8 5 2 1 0 0 4 9 6 54 1998 16 7 9 7 10 0 2 0 0 1 2 1 55 1999 8 6 6 4 2 0 2 2 0 4 7 8 49 2000 9 6 7 6 4 0 2 0 2 9 7 8 60 2001 9 9 7 7 1 1 4 1 5 4 8 13 69 2002 9 6 9 10 7 0 3 0 0 5 7 15 71 2003 5 12 8 10 5 1 0 0 0 3 7 13 64 MEAN 9.0 7.6 8.6 7.5 5.7 1.3 1.1 0.3 0.7 4.1 6.3 7.6 59.8 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 30 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH PRECIPITATION YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 8 4 0 0 0 0 2 5 5 *** 1990 15 10 13 12 4 0 0 0 0 8 3 7 72 1991 12 10 14 12 5 5 0 1 0 14 3 14 90 1992 19 19 15 11 20 6 0 4 1 0 8 17 120 1993 12 10 16 13 17 4 6 4 0 6 17 6 111 1994 13 14 11 11 7 4 0 0 5 12 16 13 106 1995 8 9 9 12 16 9 2 0 1 2 6 6 80 1996 15 12 16 15 10 1 4 0 1 7 3 13 97 1997 6 10 13 11 12 2 2 0 0 5 10 11 82 1998 18 13 14 8 10 3 5 2 1 1 6 3 84 1999 13 9 10 8 6 1 2 2 0 7 8 10 76 2000 15 10 10 8 6 1 3 1 2 10 12 14 92 2001 10 12 8 9 7 1 5 2 5 6 8 14 87 2002 13 8 11 21 9 0 4 0 0 7 12 16 101 2003 10 18 17 14 13 2 0 2 0 6 8 17 107 MEAN 12.8 11.7 12.6 11.5 9.7 2.6 2.2 1.2 1.1 6.2 8.3 11.1 91.0 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 31 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH THUNDER STORM YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 2 1 1 0 0 0 0 0 0 *** 1990 0 0 0 0 2 0 0 0 0 0 1 0 3 1991 0 0 1 0 2 3 0 1 0 2 0 1 10 1992 0 0 0 1 5 3 0 2 0 0 0 0 11 1993 0 0 0 2 2 1 3 3 0 0 0 0 11 1994 1 0 0 0 2 1 0 0 0 0 0 0 4 1995 0 0 0 2 3 3 0 0 0 1 0 0 9 1996 0 0 0 0 2 0 1 0 0 1 1 0 5 1997 0 0 0 1 4 2 1 0 0 0 0 0 8 1998 0 0 1 1 6 2 1 0 0 0 0 0 11 1999 0 0 0 2 1 0 2 1 0 1 1 0 8 2000 0 0 0 3 1 0 3 0 2 3 0 0 12 2001 0 0 0 2 1 0 1 1 5 2 1 0 13 2002 0 0 0 1 2 0 3 0 0 1 0 0 7 2003 0 0 2 6 9 2 0 3 0 3 0 2 27 MEAN 0.1 0.0 0.3 1.5 2.9 1.2 1.0 0.7 0.5 0.9 0.3 0.2 9.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 32 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH SNOW OR SLEET YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 0 0 0 0 0 0 0 1 3 *** 1990 12 10 14 6 0 0 0 0 0 1 0 5 48 1991 9 6 9 3 0 0 0 0 0 0 0 13 40 1992 14 14 8 5 3 0 0 0 0 0 4 14 62 1993 11 11 11 1 1 0 0 0 0 0 8 5 48 1994 8 10 6 1 0 0 0 0 0 0 9 12 46 1995 8 8 7 5 0 0 0 0 0 0 2 5 35 1996 14 9 13 5 0 0 0 0 0 1 0 6 48 1997 6 7 14 6 0 0 0 0 0 0 3 11 47 1998 14 9 10 4 0 0 0 0 0 0 0 1 38 1999 13 6 5 2 0 0 0 0 0 0 6 6 38 2000 14 9 6 0 0 0 0 0 0 0 7 11 47 2001 11 13 3 1 0 0 0 0 0 0 3 10 41 2002 11 7 7 7 0 0 0 0 0 0 7 15 54 2003 10 18 16 1 0 0 0 0 0 0 5 16 66 MEAN 11.1 9.8 9.2 3.1 0.3 0.0 0.0 0.0 0.0 0.1 3.7 8.9 46.2 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 33 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH DUST YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 2 0 0 0 0 2 4 1 0 *** 1990 0 0 0 0 2 4 3 0 0 0 0 2 11 1991 0 0 0 2 11 3 7 3 2 1 0 0 29 1992 0 0 0 0 0 0 1 0 0 0 0 0 1 1993 0 0 0 0 0 4 0 1 0 0 0 1 6 1994 0 0 0 0 0 2 0 2 0 0 0 0 4 1995 0 0 0 0 0 1 0 0 0 0 0 1 2 1996 0 0 0 0 0 0 0 0 0 0 0 0 0 1997 0 0 0 0 0 1 0 0 0 0 0 0 1 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 1999 0 0 1 1 4 2 4 1 2 0 1 0 16 2000 0 0 2 9 8 1 1 1 1 0 0 0 23 2001 0 0 0 4 0 0 0 0 0 0 0 0 4 2002 0 1 0 1 0 0 0 0 0 1 0 0 3 2003 1 0 0 0 1 2 9 0 1 1 0 0 15 MEAN 0.1 0.1 0.2 1.3 1.7 1.3 1.7 0.5 0.5 0.5 0.1 0.3 8.3 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 34 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M PREVAILING WIND DIRECTION , SPEED (IN KNOTS) AND PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 270 225 270 135 270 270 270 225 270 *** PREVAIL. DIRECT. ***** ***** ***** 14.1 14.0 10.4 10.8 8.5 10.5 12.1 14.0 10.2 ***** PREVAIL. SPEED ***** ***** ***** 19.3 15.5 24.8 18.7 12.9 20.7 21.9 18.0 16.1 ***** PREVAIL. PERCENT ***** ***** ***** 46.0 47.1 38.9 38.1 48.4 44.0 40.6 36.0 49.7 ***** CALMS PERCENT **** **** **** 150 155 149 155 155 150 155 150 155 1374 WIND OBSER. NO. 1990 270 225 270 225 225 270 90 270 225 270 270 270 270 PREVAIL. DIRECT. 8.1 10.0 9.0 12.3 11.1 8.8 7.6 9.5 8.5 10.3 8.7 10.4 10.0 PREVAIL. SPEED 12.3 10.7 18.7 30.7 22.6 19.3 18.7 18.7 17.3 19.4 22.7 24.5 17.6 PREVAIL. PERCENT 47.7 50.7 40.0 26.0 35.5 28.7 49.0 38.7 41.3 41.9 50.7 43.2 41.1 CALMS PERCENT 155 140 155 150 155 150 155 155 150 155 150 155 1825 WIND OBSER. NO. 1991 270 180 270 225 270 270 270 90 270 270 270 270 270 PREVAIL. DIRECT. 11.5 10.1 8.4 12.9 11.1 10.4 9.7 6.3 12.1 8.8 11.6 12.6 10.5 PREVAIL. SPEED 12.9 12.9 19.4 24.7 34.2 19.3 21.3 23.2 28.0 23.9 21.3 14.8 20.2 PREVAIL. PERCENT 60.0 58.6 52.3 32.0 11.6 24.7 26.5 31.0 29.3 49.7 50.7 67.7 41.1 CALMS PERCENT 155 140 155 150 155 150 155 155 150 155 150 155 1825 WIND OBSER. NO. 1992 270 270 270 270 270 270 90 90 270 270 225 180 270 PREVAIL. DIRECT. 15.2 17.1 12.3 10.9 15.4 12.9 7.6 10.0 11.7 15.0 14.8 10.4 13.6 PREVAIL. SPEED 14.8 20.7 13.5 28.7 20.6 28.0 12.3 20.6 14.7 27.1 19.3 7.7 17.2 PREVAIL. PERCENT 55.5 48.3 71.0 42.7 38.7 40.7 41.3 45.2 44.7 45.2 48.7 64.5 48.9 CALMS PERCENT 155 145 155 150 155 150 155 155 150 155 150 155 1830 WIND OBSER. NO. 1993 270 270 225 270 225 270 315 270 270 270 315 270 270 PREVAIL. DIRECT. 17.2 12.7 14.4 17.0 11.1 11.4 12.1 10.5 8.9 9.0 13.2 12.1 12.5 PREVAIL. SPEED 14.2 15.0 14.2 27.3 15.4 15.8 7.7 9.7 21.3 10.7 7.3 18.7 13.3 PREVAIL. PERCENT 52.3 52.1 58.1 35.3 55.5 59.6 66.9 63.3 54.6 67.2 78.0 71.6 59.8 CALMS PERCENT 155 140 155 150 247 240 248 248 240 177 150 155 2305 WIND OBSER. NO. 1994 270 270 225 270 225 315 315 270 90 270 225 270 270 PREVAIL. DIRECT. 10.4 14.5 12.2 12.7 16.0 14.9 11.4 11.9 9.2 12.2 10.5 11.8 12.2 PREVAIL. SPEED 22.1 25.0 13.5 18.7 15.5 16.0 12.9 10.3 20.0 12.2 17.1 13.7 12.9 PREVAIL. PERCENT 68.2 48.6 54.2 45.3 57.4 54.0 62.6 63.2 59.3 68.0 59.6 62.5 59.0 CALMS PERCENT 154 140 155 150 155 150 155 155 150 181 240 248 2033 WIND OBSER. NO. 1995 270 315 270 270 225 270 270 270 270 270 225 270 270 PREVAIL. DIRECT. 12.0 12.4 10.1 10.0 14.4 11.8 10.1 10.5 11.7 11.4 12.5 7.8 10.6 PREVAIL. SPEED 13.3 9.8 15.7 13.7 11.0 10.7 12.2 14.5 16.3 8.1 18.8 10.5 12.0 PREVAIL. PERCENT 71.0 75.4 63.3 52.6 59.7 69.3 66.3 62.5 60.4 69.0 58.3 75.0 65.4 CALMS PERCENT 248 224 248 211 154 150 181 248 240 248 240 248 2640 WIND OBSER. NO. 1996 90 270 270 225 225 270 90 270 270 270 180 225 270 PREVAIL. DIRECT. 11.3 14.6 9.5 14.8 13.3 11.6 9.6 12.2 12.9 12.2 10.2 13.3 12.6 PREVAIL. SPEED 11.3 11.6 11.7 16.9 17.4 12.1 11.7 11.7 26.7 13.3 6.3 20.2 11.3 PREVAIL. PERCENT 70.2 73.3 66.5 51.2 43.9 61.8 70.2 62.5 46.3 62.5 78.8 50.0 62.1 CALMS PERCENT 248 232 248 207 155 173 248 248 240 248 240 248 2735 WIND OBSER. NO. 1997 270 225 225 225 225 270 315 315 270 270 90 270 270 PREVAIL. DIRECT. 15.4 12.5 15.2 14.7 14.3 12.7 13.2 13.4 13.9 13.3 9.4 10.6 13.3 PREVAIL. SPEED 17.3 17.4 21.4 27.9 17.3 22.5 22.6 19.4 24.0 32.3 15.3 20.6 18.6 PREVAIL. PERCENT 46.0 41.5 38.7 25.4 37.1 43.8 35.5 34.7 32.3 20.6 31.3 32.9 35.7 CALMS PERCENT 248 224 248 240 248 240 248 248 229 155 150 155 2633 WIND OBSER. NO. 1998 270 225 225 225 225 270 90 90 270 270 225 225 225 PREVAIL. DIRECT. 14.8 14.1 13.3 13.9 14.8 15.5 10.9 10.7 12.3 10.4 13.0 11.4 13.0 PREVAIL. SPEED 16.8 30.7 35.5 23.3 21.3 14.7 16.1 15.9 21.3 17.7 19.6 19.0 17.7 PREVAIL. PERCENT 47.7 16.4 20.6 27.3 21.9 28.7 21.9 31.9 35.0 36.7 41.7 41.5 32.3 CALMS PERCENT 155 140 155 150 155 150 155 182 240 248 240 248 2218 WIND OBSER. NO. 1999 225 225 225 270 270 270 270 270 270 270 270 225 270 PREVAIL. DIRECT. 8.7 15.5 12.6 14.5 14.1 12.8 12.3 14.6 12.2 14.6 16.8 10.0 13.9 PREVAIL. SPEED 8.9 31.3 21.0 30.4 33.5 30.0 14.5 14.1 29.6 24.2 21.7 19.4 20.8 PREVAIL. PERCENT 64.1 33.9 31.0 19.6 14.1 23.8 35.1 38.3 29.2 33.9 36.3 53.2 34.5 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 2000 180 225 270 270 270 270 90 270 270 270 90 225 270 PREVAIL. DIRECT. 13.8 11.1 14.6 15.5 12.6 12.4 11.5 12.8 13.4 10.9 9.4 13.0 12.8 PREVAIL. SPEED 18.5 20.3 27.8 26.7 47.6 17.1 24.2 20.6 20.0 13.7 12.1 16.5 19.5 PREVAIL. PERCENT 41.9 40.5 22.2 19.2 13.7 35.8 34.3 29.0 25.4 36.3 38.8 32.7 30.8 CALMS PERCENT 248 232 248 240 248 240 248 248 240 248 240 248 2928 WIND OBSER. NO. 2001 270 225 270 225 225 270 135 270 270 270 225 225 270 PREVAIL. DIRECT. 10.2 12.6 14.0 15.2 13.7 12.5 11.3 14.9 13.4 15.1 12.5 12.8 13.6 PREVAIL. SPEED 19.8 25.4 28.2 28.3 33.5 19.2 15.7 25.0 34.6 29.0 23.8 31.5 21.5 PREVAIL. PERCENT 39.5 26.8 20.6 16.3 16.9 24.2 35.9 30.6 22.5 23.0 35.0 40.3 27.7 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 2002 225 225 225 225 225 225 315 270 270 225 225 225 225 PREVAIL. DIRECT. 13.9 12.6 14.5 16.6 15.2 15.5 13.0 14.0 13.6 13.8 13.1 12.2 13.9 PREVAIL. SPEED 19.4 25.9 32.3 41.3 29.0 28.8 19.0 24.2 31.7 26.6 15.0 24.6 24.6 PREVAIL. PERCENT 43.5 26.8 15.3 10.8 16.1 13.8 14.1 20.2 15.8 16.1 37.5 30.6 21.7 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 2003 270 225 225 225 315 270 315 270 270 270 225 225 225 PREVAIL. DIRECT. 14.4 13.6 15.8 15.9 13.6 12.9 12.5 13.5 12.4 12.5 14.1 12.4 13.8 PREVAIL. SPEED 23.0 31.7 32.7 36.3 19.0 23.3 25.0 16.1 23.3 28.6 15.8 18.5 20.1 PREVAIL. PERCENT 40.7 29.9 22.6 10.8 28.2 27.9 23.0 32.7 32.9 25.4 33.8 38.7 28.9 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 1989-2003 270 225 225 225 270 270 90 270 270 270 225 225 270 PREVAIL. DIRECT. 13.3 12.9 13.5 15.0 13.5 12.3 9.7 12.4 12.3 12.6 12.5 11.7 12.8 PREVAIL. SPEED 13.9 17.9 19.4 23.7 21.7 20.1 11.9 15.5 22.9 20.2 14.2 16.8 17.5 PREVAIL. PERCENT MEAN 53.1 44.3 39.6 29.0 31.6 37.3 41.1 41.9 37.4 41.7 47.4 49.5 41.2 CALMS PERCENT MEAN 208.1 189.5 208.1 193.9 198.3 193.5 206.3 212.6 209.3 207.8 204.0 210.8 2442.2 WIND OBSER. NO. =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 35 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M VECTOR WIND DIRECTION , MAGNITUDE (IN KNOTS) AND WIND STEADINESES (%) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 257 257 253 154 219 242 237 225 237 *** VECTOR DIRECT. **** **** **** 3.8 4.4 4.4 2.7 1.2 3.4 5.1 4.0 2.8 **** WIND MAGNITUDE ***** ***** ***** 60.3 72.1 75.9 46.6 29.3 68.0 75.0 61.5 71.8 ***** STEADINESES(%) 1990 260 235 250 249 235 230 133 223 222 245 236 246 237 VECTOR DIRECT. 2.3 1.6 1.9 7.8 4.0 3.3 1.7 2.4 2.8 2.5 3.1 4.4 2.9 WIND MAGNITUDE 52.3 42.1 35.8 82.1 64.5 55.0 43.6 46.2 58.3 51.0 72.1 78.6 54.7 STEADINESES(%) 1991 231 227 239 228 246 255 242 175 243 232 240 243 237 VECTOR DIRECT. 2.1 2.4 2.6 5.9 8.3 2.3 1.7 1.3 3.3 1.9 3.5 2.9 3.1 WIND MAGNITUDE 65.6 63.2 66.7 76.6 79.0 35.9 26.2 25.0 47.1 41.3 66.0 80.6 55.4 STEADINESES(%) 1992 254 224 254 241 239 253 224 23 236 262 235 222 242 VECTOR DIRECT. 3.3 6.3 2.0 5.2 3.7 4.6 2.3 0.6 3.0 5.7 4.8 2.1 3.4 WIND MAGNITUDE 61.1 67.7 60.6 72.2 47.4 69.7 34.3 9.8 44.8 77.0 72.7 56.8 53.1 STEADINESES(%) 1993 258 259 254 255 243 254 268 257 261 240 267 269 256 VECTOR DIRECT. 4.8 3.6 3.8 7.7 3.4 3.1 0.6 0.9 3.2 1.3 1.6 3.1 3.1 WIND MAGNITUDE 69.6 66.7 62.3 79.4 66.7 67.4 17.1 25.0 72.7 44.8 69.6 93.9 64.6 STEADINESES(%) 1994 266 270 258 257 251 284 267 261 105 273 223 241 258 VECTOR DIRECT. 2.6 5.8 4.0 4.2 4.4 4.3 1.3 1.6 2.0 2.1 3.3 3.5 2.8 WIND MAGNITUDE 83.9 82.9 69.0 59.2 75.9 66.2 32.5 41.0 54.1 63.6 80.5 77.8 57.1 STEADINESES(%) 1995 245 279 254 232 217 255 263 251 273 256 239 249 250 VECTOR DIRECT. 2.8 1.7 3.2 3.3 1.8 2.3 1.5 2.1 2.9 1.8 3.7 0.9 2.3 WIND MAGNITUDE 80.0 63.0 78.0 61.1 43.9 63.9 45.5 55.3 67.4 51.4 80.4 40.9 60.5 STEADINESES(%) 1996 140 258 243 225 268 258 96 258 265 244 224 227 245 VECTOR DIRECT. 1.5 2.7 1.6 3.5 5.1 1.6 1.2 1.5 5.6 3.1 1.7 4.6 2.3 WIND MAGNITUDE 50.0 73.0 48.5 55.6 73.9 35.6 41.4 34.9 86.2 70.5 70.8 71.9 51.1 STEADINESES(%) 1997 258 240 234 242 254 244 281 267 254 257 176 249 250 VECTOR DIRECT. 5.5 4.8 5.8 7.7 5.0 4.9 4.0 3.7 5.7 8.0 1.6 5.2 4.9 WIND MAGNITUDE 72.4 63.2 68.2 78.6 59.5 69.0 53.3 46.8 66.3 76.9 23.5 70.3 59.8 STEADINESES(%) 1998 259 253 233 238 221 203 246 215 252 246 241 233 240 VECTOR DIRECT. 3.5 9.1 7.3 5.8 4.8 2.1 0.7 0.8 4.4 2.3 5.2 4.3 4.1 WIND MAGNITUDE 53.0 70.5 75.3 60.4 53.3 23.3 7.8 10.4 58.7 33.3 74.3 67.2 48.8 STEADINESES(%) 1999 251 238 243 249 258 254 247 236 262 257 260 225 251 VECTOR DIRECT. 1.9 8.1 5.1 8.0 8.6 6.2 0.8 2.0 5.7 7.3 5.8 2.4 5.1 WIND MAGNITUDE 50.0 82.7 61.4 71.4 72.3 63.3 10.8 26.3 68.7 74.5 65.9 49.0 60.0 STEADINESES(%) 2000 214 242 245 234 254 258 95 249 255 204 185 225 237 VECTOR DIRECT. 5.2 4.6 7.8 8.6 8.9 3.4 2.2 3.0 4.0 3.1 1.0 3.0 4.1 WIND MAGNITUDE 65.0 71.9 72.2 71.1 80.9 45.3 28.9 34.9 44.4 46.3 17.9 39.5 48.8 STEADINESES(%) 2001 254 227 251 238 243 260 163 256 252 250 242 219 243 VECTOR DIRECT. 1.9 4.8 7.2 7.7 8.1 2.8 0.7 4.6 5.6 7.0 5.2 5.3 4.9 WIND MAGNITUDE 31.7 50.5 70.6 70.0 76.4 30.8 9.9 50.5 58.3 65.4 62.7 72.6 54.4 STEADINESES(%) 2002 246 254 242 235 250 248 273 248 250 247 249 231 246 VECTOR DIRECT. 4.7 7.1 7.8 11.8 8.3 6.8 3.0 5.4 6.3 6.8 2.9 5.4 6.3 WIND MAGNITUDE 58.0 63.4 65.0 79.7 70.3 54.8 29.1 56.2 61.8 62.4 40.3 60.7 59.4 STEADINESES(%) 2003 243 230 226 230 262 274 280 253 250 240 233 200 242 VECTOR DIRECT. 5.5 6.8 8.0 8.8 5.0 5.9 4.4 1.8 3.7 7.2 4.0 3.4 5.1 WIND MAGNITUDE 77.5 75.6 71.4 67.7 52.1 67.8 50.6 23.7 48.7 72.0 47.6 50.0 56.7 STEADINESES(%) 1989-2003 246 244 243 240 249 254 245 247 251 248 237 234 245 VECTOR DIRECT. 3.2 4.8 4.8 6.6 5.5 3.7 1.0 2.0 3.8 4.2 3.3 3.4 3.8 WIND MAGNITUDE 58.2 65.8 65.8 70.2 66.3 51.4 15.9 31.7 55.1 60.9 55.9 61.8 55.1 STEADINESES(%) =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 36 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF WIND SPEED IN KNOTS YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 6.3 6.1 5.8 5.8 4.1 5.0 6.8 6.5 3.9 ****** 1990 4.4 3.8 5.3 9.5 6.2 6.0 3.9 5.2 4.8 4.9 4.3 5.6 5.3 1991 3.2 3.8 3.9 7.7 10.5 6.4 6.5 5.2 7.0 4.6 5.3 3.6 5.6 1992 5.4 9.3 3.3 7.2 7.8 6.6 6.7 6.1 6.7 7.4 6.6 3.7 6.4 1993 6.9 5.4 6.1 9.7 5.1 4.6 3.5 3.6 4.4 2.9 2.3 3.3 4.8 1994 3.1 7.0 5.8 7.1 5.8 6.5 4.0 3.9 3.7 3.3 4.1 4.5 4.9 1995 3.5 2.7 4.1 5.4 4.1 3.6 3.3 3.8 4.3 3.5 4.6 2.2 3.8 1996 3.0 3.7 3.3 6.3 6.9 4.5 2.9 4.3 6.5 4.4 2.4 6.4 4.5 1997 7.6 7.6 8.5 9.8 8.4 7.1 7.5 7.9 8.6 10.4 6.8 7.4 8.2 1998 6.6 12.9 9.7 9.6 9.0 9.0 9.0 7.7 7.5 6.9 7.0 6.4 8.4 1999 3.8 9.8 8.3 11.2 11.9 9.8 7.4 7.6 8.3 9.8 8.8 4.9 8.5 2000 8.0 6.4 10.8 12.1 11.0 7.5 7.6 8.6 9.0 6.7 5.6 7.6 8.4 2001 6.0 9.5 10.2 11.0 10.6 9.1 7.1 9.1 9.6 10.7 8.3 7.3 9.0 2002 8.1 11.2 12.0 14.8 11.8 12.4 10.3 9.6 10.2 10.9 7.2 8.9 10.6 2003 7.1 9.0 11.2 13.0 9.6 8.7 8.7 7.6 7.6 10.0 8.4 6.8 9.0 MEAN 5.5 7.3 7.3 9.4 8.3 7.2 6.3 6.3 6.9 6.9 5.9 5.5 6.9 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 37 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M FASTEST WIND DIRECTION AND SPEED IN KNOTS YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 250 240 250 220 200 260 240 220 250 *** DIRECTION ** ** ** 39 39 29 19 19 19 29 31 21 ** SPEED ** ** ** 1 17 23 13 11 18 7 20 8 DAY 1990 270 180 190 280 240 190 20 180 230 270 190 270 280 DIRECTION 25 23 27 39 39 27 19 21 23 27 21 29 39 SPEED 10 19 7 19 2 16 5 19 20 25 9 9 DAY 1991 280 170 270 220 230 270 270 340 270 100 270 260 230 DIRECTION 19 21 19 29 33 31 17 27 27 19 31 27 33 SPEED 5 17 7 16 17 21 13 13 19 1 1 28 DAY 1992 270 180 270 200 270 290 240 320 240 220 190 280 270 DIRECTION 35 39 35 39 43 35 33 29 39 43 41 37 43 SPEED 8 7 3 22 19 19 10 28 27 10 24 28 DAY 1993 240 270 310 280 270 240 270 330 240 270 300 270 240 DIRECTION 54 29 49 49 43 39 31 31 29 29 49 29 54 SPEED 8 28 22 14 16 3 27 8 21 1 14 2 DAY 1994 270 310 180 160 240 310 230 240 120 270 240 270 310 DIRECTION 29 49 31 29 35 37 31 19 25 29 21 29 49 SPEED 20 19 6 1 13 3 31 1 6 19 8 12 DAY 1995 230 270 240 210 210 220 240 120 230 190 210 310 210 DIRECTION 27 29 31 33 29 27 17 19 29 31 37 17 37 SPEED 11 8 25 3 2 29 28 7 19 3 11 29 DAY 1996 250 270 300 250 220 210 120 230 300 200 280 270 270 DIRECTION 21 27 27 29 29 29 29 23 31 29 27 41 41 SPEED 6 8 13 10 16 4 12 21 3 26 11 24 DAY 1997 320 240 230 220 210 180 320 180 260 240 240 210 180 DIRECTION 29 29 33 39 33 43 23 25 29 35 21 25 43 SPEED 2 22 23 15 3 11 3 17 1 6 5 8 DAY 1998 300 230 240 190 240 110 230 230 230 240 210 240 240 DIRECTION 29 35 41 31 33 33 27 31 33 23 35 33 41 SPEED 13 8 30 17 21 20 6 17 24 1 30 17 DAY 1999 270 230 140 240 310 210 210 270 210 230 270 240 210 DIRECTION 25 43 37 39 37 49 31 45 37 47 39 25 49 SPEED 30 3 26 13 20 4 14 28 22 9 18 28 DAY 2000 210 310 190 210 270 280 250 100 240 190 100 210 210 DIRECTION 58 29 39 45 39 25 23 31 39 33 21 33 58 SPEED 19 7 8 10 6 9 1 10 27 25 17 21 DAY 2001 80 250 270 210 290 270 150 320 260 240 290 230 250 DIRECTION 25 43 35 41 39 27 33 43 29 39 39 33 43 SPEED 26 24 17 15 29 22 20 8 8 16 19 30 DAY 2002 270 280 300 210 240 250 320 270 240 210 260 190 210 DIRECTION 39 43 43 47 43 39 29 29 35 39 31 43 47 SPEED 31 16 9 25 24 1 22 4 21 3 10 20 DAY 2003 260 230 210 230 210 310 290 310 250 190 270 210 230 DIRECTION 43 37 39 47 47 35 27 29 29 47 37 31 47 SPEED 6 21 19 6 7 5 5 28 18 29 21 18 DAY 1989-2003 210 310 310 280 210 210 240 270 240 230 300 190 210 DIRECTION 58 49 49 49 47 49 33 45 39 47 49 43 58 SPEED 0-19 94-19 93-22 93-14 3- 7 99- 4 92-10 99-28 92-27 99- 9 93-14 2-20 0 YEAR-DAY =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 38 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF CLEAR DAYS (0-2)/8 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 16 19 30 29 28 29 25 13 17 *** 1990 10 7 13 12 22 30 25 31 30 19 17 11 227 1991 10 11 10 11 15 29 30 29 28 13 15 13 214 1992 10 7 10 9 5 19 26 27 26 25 12 5 181 1993 15 10 12 3 7 26 27 23 28 22 7 10 190 1994 12 7 7 14 15 25 31 31 18 11 12 11 194 1995 14 11 14 6 12 19 28 31 26 27 20 20 228 1996 8 6 5 8 14 27 18 29 28 17 18 8 186 1997 16 20 9 7 11 24 29 27 29 18 8 8 206 1998 7 10 11 9 13 24 27 25 29 25 16 11 207 1999 13 19 17 11 20 26 25 19 29 20 13 15 227 2000 10 16 17 9 22 29 23 27 28 18 9 7 215 2001 12 10 14 10 19 28 24 27 23 17 13 7 204 2002 13 12 14 5 16 26 28 31 29 14 13 6 207 2003 10 5 8 5 15 24 30 29 30 18 12 7 193 MEAN 11.4 10.8 11.5 9.0 15.0 25.7 26.7 27.6 27.3 19.3 13.2 10.4 207.9 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 39 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF PARTLY CLOUDY DAYS (3-6)/8 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 12 12 0 2 3 1 6 9 10 *** 1990 11 8 10 16 7 0 6 0 0 8 12 13 91 1991 14 11 7 14 14 1 1 2 2 12 11 7 96 1992 14 11 14 13 15 10 4 4 4 6 15 14 124 1993 6 9 11 17 12 4 4 8 2 7 7 13 100 1994 8 15 16 8 13 5 0 0 12 14 8 13 112 1995 13 9 9 15 13 9 3 0 4 4 8 4 91 1996 10 10 16 11 11 3 13 2 2 13 11 14 116 1997 10 5 8 15 17 5 2 4 1 11 12 15 105 1998 8 6 11 15 15 6 3 6 1 4 12 15 102 1999 6 5 6 17 11 4 5 12 1 9 12 9 97 2000 10 6 10 17 7 1 8 3 2 9 12 16 101 2001 9 11 11 16 9 2 7 4 7 12 13 13 114 2002 8 9 10 9 12 4 3 0 1 15 8 10 89 2003 10 14 16 10 12 6 1 2 0 13 11 12 107 MEAN 9.8 9.2 11.1 13.7 12.0 4.0 4.1 3.3 2.7 9.5 10.7 11.9 102.0 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 40 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF CLOUDY DAYS (7-8)/8 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 2 0 0 0 0 0 0 8 4 *** 1990 10 12 8 2 2 0 0 0 0 4 1 7 46 1991 7 6 14 5 2 0 0 0 0 6 4 11 55 1992 7 11 7 8 11 1 1 0 0 0 3 12 61 1993 10 9 8 10 12 0 0 0 0 2 16 8 75 1994 11 6 8 8 3 0 0 0 0 6 10 7 59 1995 4 8 8 9 6 2 0 0 0 0 2 7 46 1996 13 13 10 11 6 0 0 0 0 1 1 9 64 1997 5 3 14 8 3 1 0 0 0 2 10 8 54 1998 16 12 9 6 3 0 1 0 0 2 2 5 56 1999 12 4 8 2 0 0 1 0 0 2 5 7 41 2000 11 7 4 4 2 0 0 1 0 4 9 8 50 2001 10 7 6 4 3 0 0 0 0 2 4 11 47 2002 10 7 7 16 3 0 0 0 0 2 9 15 69 2003 11 9 7 15 4 0 0 0 0 0 7 10 63 MEAN 9.8 8.1 8.4 7.3 4.0 0.3 0.2 0.1 0.0 2.2 6.1 8.6 55.1 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 41 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M NO. OF DAYS WITH VISIBILITY LESS THAN OR EQUAL 2 KM YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 *** *** *** 1 0 0 0 0 0 1 7 3 *** 1990 7 11 3 2 0 0 0 0 0 0 0 3 26 1991 8 2 7 1 3 0 0 0 0 6 0 13 40 1992 7 8 10 4 4 1 0 0 0 0 2 8 44 1993 9 9 7 1 2 0 0 0 0 0 16 7 51 1994 8 6 5 2 1 1 0 0 0 1 6 4 34 1995 3 9 4 2 0 0 0 0 0 0 0 3 21 1996 3 12 11 3 0 0 0 0 0 0 0 2 31 1997 5 0 7 5 1 0 0 0 0 0 5 2 25 1998 8 6 4 1 0 0 0 0 0 0 4 3 26 1999 12 4 0 1 0 1 2 0 0 2 3 4 29 2000 11 6 5 3 1 0 0 0 0 3 8 11 48 2001 7 8 6 2 0 0 0 0 0 0 5 13 41 2002 6 3 4 3 1 0 0 0 0 0 5 14 36 2003 10 11 7 6 3 1 0 0 0 0 5 13 56 MEAN 7.4 6.8 5.7 2.5 1.1 0.3 0.1 0.0 0.0 0.9 4.4 6.9 36.1 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 42 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MONTHLY TOTAL OF SUNSHINE HOURS YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ***** ***** ***** 263.5 323.6 372.0 364.1 ***** ***** ***** 169.4 168.1 ****** 1990 ***** ***** 199.3 254.5 131.7 ***** ***** ***** ***** ***** ***** ***** ****** 1991 82.1 152.8 151.2 220.6 321.4 348.0 370.3 ***** 301.2 203.6 210.7 124.8 ****** 1992 161.7 128.5 180.4 228.8 204.2 314.7 354.6 343.0 315.3 294.6 199.3 93.3 2818.4 1993 151.4 160.1 231.0 208.6 213.3 379.4 349.4 336.7 328.4 255.3 102.1 158.1 2873.8 1994 133.4 172.5 206.3 234.3 314.0 372.7 392.1 379.2 286.9 226.3 174.0 151.1 3042.8 1995 197.9 ***** 236.7 ***** ***** 192.6 366.8 300.9 320.0 297.7 242.2 192.9 ****** 1996 123.4 120.6 175.1 196.4 293.1 373.7 322.1 364.9 322.6 266.6 230.4 140.9 2929.8 1997 189.3 238.5 176.1 250.7 290.6 359.4 383.8 363.2 320.8 257.8 143.7 155.3 3129.2 1998 119.0 150.3 211.7 246.2 313.7 366.1 367.1 342.1 326.3 288.1 218.9 191.6 3141.1 1999 150.4 221.8 239.7 284.0 330.7 369.0 354.4 296.3 334.8 272.3 196.9 178.8 3229.1 2000 141.3 218.0 268.2 233.1 343.3 371.4 343.5 348.0 304.3 240.1 179.7 147.2 3138.1 2001 169.7 173.7 248.1 261.8 333.9 392.8 360.8 361.8 308.4 270.9 188.9 133.5 3204.3 2002 169.0 216.7 237.4 192.9 347.0 382.3 367.2 385.9 330.2 244.0 185.5 119.1 3177.2 2003 150.8 171.7 198.8 218.6 315.7 353.8 380.6 371.4 336.1 276.1 188.4 130.9 3092.9 MEAN 149.2 177.1 211.4 235.3 291.2 353.4 362.6 349.4 318.1 261.0 187.9 149.0 3045.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 43 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M AVERAGE OF QFE PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ****** ****** ****** ****** ****** 785.9 786.3 786.2 787.8 790.0 788.2 785.5 ****** 1990 784.1 782.1 786.5 784.3 786.5 785.8 785.3 786.0 787.8 790.2 790.1 786.9 786.3 1991 784.7 784.3 783.8 786.6 785.1 785.9 784.3 785.6 789.3 790.5 789.3 783.8 786.1 1992 783.1 780.5 783.6 784.4 786.3 785.6 785.3 787.5 789.3 790.0 788.5 784.4 785.7 1993 784.5 784.0 784.0 785.3 786.9 786.5 786.4 787.7 788.3 791.7 787.1 788.7 786.8 1994 785.7 782.8 784.4 787.3 787.1 784.3 783.5 784.9 790.8 791.5 786.3 785.9 786.2 1995 787.1 784.8 785.1 785.2 788.5 786.1 783.5 786.2 788.0 789.8 788.0 787.2 786.6 1996 785.2 783.6 781.9 785.3 788.1 786.4 787.4 787.4 787.7 789.3 790.7 788.3 786.8 1997 784.4 783.8 781.0 784.6 788.0 785.9 784.2 786.2 789.0 790.4 788.6 785.8 786.0 1998 782.5 783.9 783.5 786.4 787.7 788.2 785.4 788.3 788.3 790.7 790.2 789.5 787.1 1999 785.8 784.3 783.6 785.9 787.3 785.8 784.7 787.5 787.7 789.6 787.8 790.0 786.7 2000 783.0 784.4 783.9 786.7 786.3 785.5 786.6 787.1 787.5 789.4 789.2 786.1 786.3 2001 786.5 784.4 785.7 786.5 785.4 785.2 785.3 787.8 788.9 789.7 787.8 787.5 786.7 2002 785.1 786.5 785.2 783.5 785.7 786.1 786.8 786.1 790.2 790.9 790.0 784.5 786.7 2003 785.9 781.8 782.9 785.9 788.4 785.8 784.2 787.7 788.5 790.1 789.2 787.9 786.5 MEAN 784.8 783.7 783.9 785.6 787.0 785.9 785.3 786.8 788.6 790.3 788.7 786.8 786.4 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION ZARINEH OBATO (40749) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 44 LATITUDE 36 4 N LONGITUDE 46 55 E DATA PROCESSING CENTER ELEVATION 2142.6 M MAX. OF QFE PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1989 ****** ****** ****** ****** ****** 789.8 790.1 789.7 793.5 795.5 792.0 790.7 ****** DAY-HOUR **-** **-** **-** **-** **-** 13- 9 9- 6 19- 9 24- 6 27- 6 3- 6 18- 9 1990 791.7 789.8 794.5 790.3 791.1 790.2 789.5 789.3 792.0 795.7 797.1 793.0 797.1 DAY-HOUR 26- 9 8- 6 9- 9 25- 6 16- 6 5- 6 15- 6 29- 6 27- 6 16- 6 23- 6 7- 6 1991 791.9 792.7 791.4 791.8 789.5 791.0 787.9 789.1 793.0 794.2 793.7 791.2 794.2 DAY-HOUR 12- 6 15- 6 29- 6 19- 6 25- 6 23- 3 11- 6 23- 6 16- 6 13- 6 24- 6 17- 6 1992 792.0 788.4 792.8 788.8 792.7 790.8 790.4 792.1 793.4 793.9 796.0 790.1 796.0 DAY-HOUR 10- 6 15-15 12- 9 21- 6 29- 9 11- 6 6- 6 31- 6 2- 6 29- 6 4- 6 1- 6 1993 791.1 789.7 793.3 792.6 791.5 792.9 790.8 791.2 792.6 797.1 794.2 795.6 797.1 DAY-HOUR 6- 6 9- 6 31- 6 17- 6 18-18 22- 6 27- 6 30- 9 16- 6 17- 6 21- 6 26- 6 1994 793.8 790.0 790.5 792.8 792.0 788.7 786.4 790.7 796.3 796.6 795.1 791.6 796.6 DAY-HOUR 9- 9 18- 9 18- 9 5- 9 18- 9 8- 9 2- 6 15- 6 23- 6 11- 6 2- 6 21-18 1995 794.1 790.9 793.1 790.0 793.0 789.5 787.7 789.9 794.1 796.9 794.2 790.6 796.9 DAY-HOUR 7- 6 1-18 3- 9 12- 9 22- 6 1- 9 4- 6 25- 6 13- 6 25- 6 15-18 29-18 1996 792.0 789.8 788.1 790.2 792.4 789.2 792.8 793.3 793.8 795.9 797.0 793.3 797.0 DAY-HOUR 25-18 8- 9 29-18 30- 6 18- 3 12- 6 3-21 29- 6 26- 6 1-21 18- 6 4- 6 1997 790.8 791.0 791.3 791.4 792.8 790.4 788.4 789.5 793.8 795.8 797.3 791.4 797.3 DAY-HOUR 12- 9 16-21 11- 6 24- 6 12- 6 8- 9 19- 6 11- 6 19- 6 9- 6 8- 6 28- 6 1998 790.0 794.5 790.6 797.0 795.5 792.7 791.4 792.3 792.2 796.3 795.8 795.7 797.0 DAY-HOUR 22- 9 23- 6 28- 6 12- 9 8- 6 17- 6 20- 6 29- 6 19- 6 13-18 21- 6 9- 6 1999 794.2 790.4 790.7 790.5 794.4 790.5 788.5 793.4 792.6 793.8 793.0 794.3 794.4 DAY-HOUR 2- 6 12- 9 31- 6 11- 9 28- 6 1- 6 19- 6 18-21 30- 6 1- 6 3- 6 5- 9 2000 791.5 791.4 790.0 791.4 790.4 789.0 793.0 791.1 793.0 792.8 794.9 792.5 794.9 DAY-HOUR 30-21 10-21 27- 6 2- 6 5-15 13- 6 30- 6 23- 6 29- 6 30- 6 17- 6 4- 6 2001 790.8 791.6 793.7 794.9 790.2 791.2 790.6 791.9 793.7 796.1 794.2 793.6 796.1 DAY-HOUR 9-18 28-18 1- 9 1- 6 14-18 2- 6 28- 9 5- 9 23- 6 10- 6 2- 6 9-18 2002 793.5 795.6 794.7 790.0 790.8 791.4 790.6 790.3 794.3 796.7 797.0 793.9 797.0 DAY-HOUR 27- 6 6- 9 11- 6 1- 6 17- 6 24-18 29- 6 31- 6 29- 6 10- 6 18- 6 3- 6 2003 794.1 789.3 791.5 793.2 792.8 789.4 790.7 791.0 793.5 796.7 797.0 795.4 797.0 DAY-HO