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