STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** ***** 21.7 28.7 32.3 33.0 30.8 27.3 23.5 14.5 6.8 ***** MINIMUN AIR TEMPERATURE (C) ***** ***** 3.4 12.8 17.9 22.3 24.9 22.6 16.6 11.7 5.0 0.7 ***** DAYS WITH MINIMUM TEMP. >=21 **** **** 0 0 5 20 25 21 3 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** **** 0 0 0 0 0 0 0 0 0 8 **** DAYS WITH FREEZING MIN.<= 0 **** **** 2 0 0 0 0 0 0 0 6 16 **** TEMPERATURE RECORDS LOWEST(C) ***** ***** -2.2 7.0 13.0 16.4 17.8 17.0 11.4 4.2 -1.6 -10.2 ***** DAY ** ** 18 2 2 6 26 29 16 18 27 13 MAXIMUM AIR TEMPERATURE (C) ***** ***** 15.1 26.8 34.0 37.5 37.7 35.7 32.9 30.1 19.7 10.9 ***** DAYS WITH MAXIMUM TEMP. >=30 **** **** 0 7 27 30 31 31 29 15 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 **** **** 0 0 0 0 0 0 0 0 0 1 **** TEMPERATURE RECORDS HIGHEST(C)***** ***** 23.0 31.6 38.5 42.8 40.0 38.6 36.0 35.6 28.0 18.2 ***** DAY ** ** 8 18 24 19 17 1 27 7 10 31 DIF. BETWEEN (MAX.-MIN.) (C) ***** ***** 11.7 14.0 16.1 15.2 12.8 13.1 16.3 18.4 14.7 10.2 ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** 9.3 19.8 26.0 29.9 31.3 29.2 24.8 20.9 12.4 5.8 ***** COOLING DEG. DAYS(BASE 21 0C)****** ****** 0.0 15.0 153.6 266.7 309.0 252.9 112.5 47.6 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C)****** ****** 204.2 12.3 0.0 0.0 0.0 0.0 0.0 15.5 172.3 378.5 ****** DEWPOINT (MEAN C) ***** ***** ***** ***** ***** ***** ***** ***** ***** -1.1 0.2 -1.5 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** ****** ****** ****** ****** 4.15 4.61 4.24 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** 5.87 6.50 5.99 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** 25.16 11.37 4.55 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** *** *** *** 21 41 59 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** *** *** *** *** 29 58 82 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** *** *** *** *** 17 32 44 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** *** *** *** 28 55 79 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** *** *** *** 18 35 50 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** *** *** *** *** 19 37 56 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** 66.9 5.5 0.0 0.7 0.0 0.0 0.0 0.7 6.0 33.5 ****** DAYS WITH PRECIPITATION >=10 **** **** 3 0 0 0 0 0 0 0 0 1 **** DAYS WITH PRECIPITATION >= 5 **** **** 4 0 0 0 0 0 0 0 1 4 **** DAYS WITH PRECIPITATION >= 1 **** **** 9 3 0 0 0 0 0 0 1 7 **** DAYS WITH PRECIPITATION **** **** 10 5 1 3 0 0 0 1 4 11 **** GREATEST DAILY PRECIPITATION ****** ****** 27.0 2.0 0.0 0.4 0.0 0.0 0.0 0.7 5.1 10.0 ****** DAY ** ** 27 7 ** 9 ** ** ** 26 24 6 DAY WITH THUNDER STORM **** **** 2 2 1 2 0 0 0 0 0 0 **** DAYS WITH SNOW OR SLEET **** **** 0 0 0 0 0 0 0 0 0 1 **** DAYS WITH DUST **** **** 0 1 3 3 12 6 2 1 0 0 **** WIND DIRECTION (PREVAILING) *** *** *** 135 90 315 315 360 360 135 135 270 *** PREVAILING WIND SPEED(KNOTS) **** **** **** 7.8 11.5 16.0 18.2 17.8 17.8 8.4 7.7 10.0 **** PREVAILING WIND PERCENT ***** ***** ***** 24.7 18.7 36.7 51.0 59.4 26.0 18.7 20.0 14.8 ***** CALMS PERCENT OF WIND ***** ***** ***** 40.7 38.7 34.0 15.5 11.0 41.3 60.6 57.3 56.8 ***** NO. OF WIND OBSERVATION **** **** 118 150 155 150 155 155 150 155 150 155 1493 VECTOR WIND DIRECTION (MEAN) *** *** *** 130 62 326 340 6 18 138 187 219 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** 1.6 1.1 5.9 12.3 12.3 5.4 1.4 1.8 1.1 **** WIND STEADINESES (MEAN %) ***** ***** ***** 32.7 16.7 69.4 84.2 87.9 65.9 45.2 52.9 29.7 ***** WIND SPEED (MEAN KNOTS) **** **** **** 4.9 6.6 8.5 14.6 14.0 8.2 3.1 3.4 3.7 **** FASTEST WIND DIRECTION *** *** *** 330 100 330 330 360 360 300 270 290 *** FASTEST WIND SPEED (KNOTS) *** *** *** 29 25 45 33 39 37 33 19 19 *** DAY ** ** ** 6 11 30 1 18 22 26 10 21 DAYS WITH SKY CLEAR (0-2)/8 **** **** 5 10 15 21 30 30 29 28 17 13 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** 13 18 14 9 1 1 1 3 12 9 **** DAYS WITH CLOUDY (7-8)/8 **** **** 6 2 2 0 0 0 0 0 1 9 **** DAYS WITH VISIBILITY =< 2 KM **** **** 0 0 0 1 4 2 0 0 0 1 **** DURATION OF SUNSHINE HOURS ****** ****** 147.2 273.4 317.0 227.2 360.9 362.8 319.1 295.0 225.1 177.8 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 884.9 885.2 885.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 891.9 892.2 892.0 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** 20- 6 16- 6 7- 6 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 880.4 877.6 877.3 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** 1-12 7-12 31- 3 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.0 1023.3 1024.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1030.9 1031.2 1031.0 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** 20- 6 16- 6 7- 6 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1017.9 1014.8 1014.5 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** 1-12 7-12 31- 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** 885.8 885.8 885.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 891.0 891.6 890.0 ****** DAY ** ** ** ** ** ** ** ** ** 20 16 7 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 881.7 880.2 877.3 ****** DAY ** ** ** ** ** ** ** ** ** 1 8 31 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.0 1024.1 1023.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1029.9 1030.5 1028.7 ****** DAY ** ** ** ** ** ** ** ** ** 20 16 7 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.4 1017.7 1014.5 ****** DAY ** ** ** ** ** ** ** ** ** 1 8 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1018.5 1022.5 1025.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1027.0 1031.4 1032.7 ****** DAY ** ** ** ** ** ** ** ** ** 20 16 15 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1012.5 1014.3 1011.7 ****** DAY ** ** ** ** ** ** ** ** ** 1 8 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 886.4 886.8 887.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 891.9 892.2 892.0 ****** DAY ** ** ** ** ** ** ** ** ** 20 16 7 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 882.8 881.5 879.5 ****** DAY ** ** ** ** ** ** ** ** ** 1 8 31 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.7 1025.1 1025.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1030.9 1031.2 1031.0 ****** DAY ** ** ** ** ** ** ** ** ** 20 16 7 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.6 1019.2 1016.9 ****** DAY ** ** ** ** ** ** ** ** ** 1 8 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** 884.5 884.6 885.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 890.6 889.7 889.6 ****** DAY ** ** ** ** ** ** ** ** ** 20 15 23 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 881.1 879.0 878.8 ****** DAY ** ** ** ** ** ** ** ** ** 1 7 31 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1022.6 1022.7 1023.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1029.4 1028.4 1028.3 ****** DAY ** ** ** ** ** ** ** ** ** 20 15 23 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1018.7 1016.4 1016.1 ****** DAY ** ** ** ** ** ** ** ** ** 1 7 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** 883.5 883.8 884.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 889.6 889.4 889.0 ****** DAY ** ** ** ** ** ** ** ** ** 20 15 23 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 880.4 877.6 879.7 ****** DAY ** ** ** ** ** ** ** ** ** 1 7 31 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1021.4 1021.8 1023.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1028.3 1028.1 1027.6 ****** DAY ** ** ** ** ** ** ** ** ** 20 15 23 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1017.9 1014.8 1017.2 ****** DAY ** ** ** ** ** ** ** ** ** 1 7 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 NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 884.4 884.8 885.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 890.0 890.2 890.3 ****** DAY ** ** ** ** ** ** ** ** ** 20 15 23 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 881.6 878.9 880.1 ****** DAY ** ** ** ** ** ** ** ** ** 7 7 20 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1022.4 1022.9 1024.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1028.7 1029.0 1029.1 ****** DAY ** ** ** ** ** ** ** ** ** 20 15 23 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.3 1016.3 1017.6 ****** DAY ** ** ** ** ** ** ** ** ** 7 7 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.9 1021.4 1025.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.2 1030.3 1033.6 ****** DAY ** ** ** ** ** ** ** ** ** 20 27 14 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.3 1013.3 1017.2 ****** DAY ** ** ** ** ** ** ** ** ** 7 7 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.2 11.9 17.2 23.7 28.3 31.4 32.7 32.8 29.4 19.7 15.8 10.7 21.9 MINIMUN AIR TEMPERATURE (C) -0.9 2.7 9.3 13.3 17.3 22.5 24.4 24.4 17.9 8.8 4.2 0.3 12.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 4 5 23 28 27 5 0 0 0 92 DAYS WITH MINIMUM TEMP. <=-4 1 0 0 0 0 0 0 0 0 0 1 5 7 DAYS WITH FREEZING MIN.<= 0 22 9 0 0 0 0 0 0 0 1 1 16 49 TEMPERATURE RECORDS LOWEST(C) -4.6 -3.0 2.2 4.4 10.4 14.8 19.4 18.2 13.0 0.0 -4.8 -8.0 -8.0 DAY 23 8 23 3 2 2 12 29 11 17 30 3 MAXIMUM AIR TEMPERATURE (C) 15.5 17.3 21.7 28.8 33.3 35.5 36.7 37.0 34.9 25.3 22.2 17.1 27.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 15 26 29 31 31 30 10 0 0 172 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.6 22.8 26.6 36.6 38.2 40.6 40.6 39.0 39.6 34.0 28.4 21.2 40.6 DAY 27 28 3 27 27 6 9 25 6 7 6 14 DIF. BETWEEN (MAX.-MIN.) (C) 16.4 14.6 12.4 15.5 16.0 13.0 12.3 12.6 17.0 16.5 18.0 16.8 15.1 MEAN DAILY TEMP. (MDT) (C) 7.3 10.0 15.5 21.1 25.3 29.0 30.5 30.7 26.4 17.1 13.2 8.7 19.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 66.4 136.8 239.7 295.9 300.8 162.2 19.3 0.0 0.0 1221.1 HEATING DEG. DAYS(BASE 18 0C) 331.7 224.3 81.1 27.2 0.0 0.0 0.0 0.0 0.0 83.9 147.5 288.4 1184.2 DEWPOINT (MEAN C) -2.1 0.5 0.1 -0.6 3.1 4.4 1.0 -5.1 -9.6 -9.4 -12.8 -9.6 -3.3 MIXING RATIO (G/KG) 3.81 4.67 4.69 4.31 5.74 6.27 4.79 3.03 2.18 2.26 1.71 2.62 3.84 VAPOUR PRESSURE (HPA) 5.39 6.58 6.58 6.06 8.04 8.74 6.69 4.24 3.08 3.21 2.43 3.71 5.39 SATURATION DEF. (HPA) 7.14 8.14 13.78 25.42 32.01 38.28 43.93 46.60 39.87 21.96 17.40 10.17 25.39 RELATIVE HUMIDITY (MEAN %) 48 49 35 22 22 20 14 9 8 14 14 28 24 RELATIVE HUMIDITY (MAX. %) 72 70 55 34 32 27 20 12 12 19 21 39 34 RELATIVE HUMIDITY (MIN. %) 33 37 24 16 16 17 11 7 5 11 10 19 17 RELATIVE HUMIDITY (MEAN% 03UTC) 71 68 53 33 31 26 19 12 12 19 20 39 34 RELATIVE HUMIDITY (MEAN% 09UTC) 37 42 29 19 18 17 12 8 6 12 12 21 19 RELATIVE HUMIDITY (MEAN% 15UTC) 40 42 29 18 19 19 12 8 7 13 13 28 21 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 4.3 16.0 5.6 2.9 4.4 8.8 0.0 0.0 0.0 0.7 0.2 5.3 48.2 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 0 1 0 0 0 1 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 1 1 2 3 1 1 1 0 0 0 0 0 2 11 DAYS WITH PRECIPITATION 2 2 6 2 7 2 1 0 0 1 1 2 26 GREATEST DAILY PRECIPITATION 4.0 15.0 2.0 2.6 3.0 8.5 0.0 0.0 0.0 0.7 0.2 4.3 15.0 DAY 8 22 30 7 7 1 ** ** ** 5 29 29 DAY WITH THUNDER STORM 0 0 0 0 1 0 0 0 0 1 0 0 2 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 2 4 3 1 1 3 3 0 0 0 0 17 WIND DIRECTION (PREVAILING) 270 270 135 270 360 360 360 360 135 135 135 135 360 PREVAILING WIND SPEED(KNOTS) 9.7 9.6 8.9 10.3 16.3 18.3 21.0 20.8 8.5 7.9 7.6 8.2 19.5 PREVAILING WIND PERCENT 12.3 23.6 18.7 24.0 10.3 36.7 52.9 43.9 22.7 21.9 16.7 16.1 13.4 CALMS PERCENT OF WIND 64.5 46.4 29.7 34.0 41.9 12.7 10.3 11.0 26.0 47.1 57.3 53.5 36.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 209 205 221 262 22 19 10 14 80 174 172 185 15 VECTOR WIND MAGNITUDE(KNOTS) 1.0 2.3 3.2 2.4 1.3 10.3 13.0 10.8 3.6 1.6 1.2 1.8 2.1 WIND STEADINESES (MEAN %) 34.5 50.0 47.1 38.1 21.7 81.7 82.8 78.8 48.0 39.0 36.4 52.9 29.2 WIND SPEED (MEAN KNOTS) 2.9 4.6 6.8 6.3 6.0 12.6 15.7 13.7 7.5 4.1 3.3 3.4 7.2 FASTEST WIND DIRECTION 290 270 260 40 20 360 360 360 360 50 10 230 360 FASTEST WIND SPEED (KNOTS) 19 21 25 23 25 33 43 37 33 23 21 14 43 DAY 27 7 4 10 26 19 25 12 4 5 16 8 DAYS WITH SKY CLEAR (0-2)/8 25 19 11 20 17 29 27 30 27 24 26 23 278 DAYS WITH P.CLOUDY (3-6)/8 6 6 15 10 11 0 4 1 3 7 3 6 72 DAYS WITH CLOUDY (7-8)/8 0 3 5 0 3 1 0 0 0 0 1 2 15 DAYS WITH VISIBILITY =< 2 KM 1 1 1 1 0 0 0 0 0 0 0 0 4 DURATION OF SUNSHINE HOURS 272.6 232.1 214.5 302.3 283.6 351.6 348.0 331.7 303.7 287.6 269.6 234.8 3432.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 886.6 884.5 878.9 881.1 880.1 876.7 875.4 874.9 879.8 884.9 886.1 886.1 881.3 MAX. QFE PRESSURE IN HPA 892.5 891.9 887.3 885.6 886.8 881.5 880.5 880.6 886.3 891.3 894.9 895.2 895.2 DAY-HOUR 20- 6 1- 6 23- 6 17- 6 1- 6 28- 6 29- 6 7- 6 26- 6 29- 6 30- 6 2- 6 MIN. QFE PRESSURE IN HPA 878.3 876.9 870.6 874.8 875.1 871.2 869.4 870.0 875.9 876.2 880.6 876.1 869.4 DAY-HOUR 3-12 10-15 14-15 5-12 23-12 13-12 3-15 25-12 6-12 9-12 7-12 31-12 MEAN QNH PRESSURE IN HPA 1024.9 1022.5 1016.3 1018.7 1017.6 1013.8 1012.3 1011.8 1017.3 1023.0 1024.4 1024.4 1018.9 MAX. QNH PRESSURE IN HPA 1031.6 1030.9 1025.7 1023.8 1025.1 1019.2 1018.1 1018.2 1024.6 1030.2 1034.3 1034.6 1034.6 DAY-HOUR 20- 6 1- 6 23- 6 17- 6 1- 6 28- 6 29- 6 7- 6 26- 6 29- 6 30- 6 2- 6 MIN. QNH PRESSURE IN HPA 1015.6 1014.0 1006.9 1011.6 1012.0 1007.6 1005.6 1006.2 1012.9 1013.2 1018.2 1013.1 1005.6 DAY-HOUR 3-12 10-15 14-15 5-12 23-12 13-12 3-15 25-12 6-12 9-12 7-12 31-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 886.8 884.8 879.3 882.0 881.2 877.6 876.2 875.7 880.7 885.6 886.7 886.7 881.9 MAX. QFE PRESSURE IN HPA 891.5 890.9 886.3 885.2 886.3 880.6 879.9 879.4 885.4 890.5 893.5 894.2 894.2 DAY 17 1 23 17 1 2 29 7 26 29 30 2 MIN. QFE PRESSURE IN HPA 879.2 878.4 871.9 875.9 877.1 873.5 870.9 872.9 878.2 878.2 882.3 876.7 870.9 DAY 3 11 20 5 23 13 4 25 2 9 8 31 MEAN QNH PRESSURE IN HPA 1025.1 1022.9 1016.7 1019.8 1018.9 1014.8 1013.2 1012.7 1018.3 1023.8 1025.0 1025.0 1019.7 MAX. QNH PRESSURE IN HPA 1030.4 1029.8 1024.6 1023.3 1024.6 1018.2 1017.4 1016.8 1023.6 1029.3 1032.7 1033.5 1033.5 DAY 17 1 23 17 1 2 29 7 26 29 30 2 MIN. QNH PRESSURE IN HPA 1016.6 1015.7 1008.4 1012.9 1014.2 1010.2 1007.3 1009.5 1015.5 1015.5 1020.1 1013.8 1007.3 DAY 3 11 20 5 23 13 4 25 2 9 8 31 MEAN QFF PRESSURE IN HPA 1026.4 1022.4 1012.9 1013.5 1010.2 1004.2 1001.9 1001.7 1009.8 1020.0 1023.5 1025.9 1014.4 MAX. QFF PRESSURE IN HPA 1033.0 1029.2 1024.0 1019.8 1018.2 1011.7 1007.4 1005.6 1016.4 1028.3 1036.3 1038.8 1038.8 DAY 17 8 23 3 1 2 29 7 26 13 30 2 MIN. QFF PRESSURE IN HPA 1018.2 1011.7 1002.6 1004.3 1005.0 1000.0 994.5 998.5 1005.9 1008.3 1014.2 1011.3 994.5 DAY 28 11 20 20 28 13 4 19 1 9 8 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 888.3 886.1 880.4 882.7 881.6 878.0 876.5 876.2 881.3 886.5 887.7 887.8 882.8 MAX. QFE PRESSURE IN HPA 892.5 891.9 887.3 885.6 886.8 881.5 880.5 880.6 886.3 891.3 894.9 895.2 895.2 DAY 20 1 23 17 1 28 29 7 26 29 30 2 MIN. QFE PRESSURE IN HPA 880.5 881.0 874.3 877.6 877.8 873.7 871.6 873.0 878.8 878.8 883.6 878.4 871.6 DAY 3 10 20 5 23 13 4 25 11 9 8 31 MEAN QNH PRESSURE IN HPA 1026.9 1024.3 1018.0 1020.6 1019.2 1015.2 1013.6 1013.2 1019.0 1024.8 1026.1 1026.3 1020.6 MAX. QNH PRESSURE IN HPA 1031.6 1030.9 1025.7 1023.8 1025.1 1019.2 1018.1 1018.2 1024.6 1030.2 1034.3 1034.6 1034.6 DAY 20 1 23 17 1 28 29 7 26 29 30 2 MIN. QNH PRESSURE IN HPA 1018.1 1018.6 1011.1 1014.8 1015.0 1010.4 1008.0 1009.6 1016.1 1016.1 1021.5 1015.7 1008.0 DAY 3 10 20 5 23 13 4 25 11 9 8 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 886.3 884.5 879.2 881.2 880.1 876.9 875.6 875.1 879.8 884.6 885.7 885.7 881.2 MAX. QFE PRESSURE IN HPA 890.3 890.3 885.8 883.8 884.7 881.2 879.4 879.3 884.3 888.6 893.2 893.3 893.3 DAY 17 12 23 22 1 1 28 7 26 29 30 1 MIN. QFE PRESSURE IN HPA 878.4 878.6 872.7 876.2 876.5 873.0 871.2 871.8 877.3 876.7 881.8 877.0 871.2 DAY 3 10 14 5 23 13 4 25 2 9 7 31 MEAN QNH PRESSURE IN HPA 1024.6 1022.5 1016.6 1018.9 1017.6 1014.0 1012.5 1012.0 1017.3 1022.7 1023.9 1023.9 1018.9 MAX. QNH PRESSURE IN HPA 1029.1 1029.1 1024.0 1021.8 1022.8 1018.8 1016.8 1016.7 1022.3 1027.2 1032.3 1032.5 1032.5 DAY 17 12 23 22 1 1 28 7 26 29 30 1 MIN. QNH PRESSURE IN HPA 1015.7 1015.9 1009.3 1013.2 1013.6 1009.6 1007.6 1008.3 1014.5 1013.8 1019.5 1014.1 1007.6 DAY 3 10 14 5 23 13 4 25 2 9 7 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 885.3 883.1 877.6 879.6 878.8 875.6 874.3 873.7 878.3 883.6 884.8 884.8 880.0 MAX. QFE PRESSURE IN HPA 889.5 888.4 884.4 882.8 882.8 881.0 877.7 878.2 882.7 887.2 891.8 891.8 891.8 DAY 17 1 23 22 1 1 28 7 26 16 30 1 MIN. QFE PRESSURE IN HPA 878.3 877.3 870.7 874.8 875.1 871.2 869.7 870.0 875.9 876.2 880.6 876.1 869.7 DAY 3 10 14 5 23 13 3 25 6 9 7 31 MEAN QNH PRESSURE IN HPA 1023.5 1020.9 1014.8 1017.0 1016.1 1012.6 1011.0 1010.4 1015.6 1021.5 1022.9 1022.9 1017.4 MAX. QNH PRESSURE IN HPA 1028.2 1026.9 1022.4 1020.6 1020.6 1018.6 1014.9 1015.5 1020.5 1025.6 1030.8 1030.8 1030.8 DAY 17 1 23 22 1 1 28 7 26 16 30 1 MIN. QNH PRESSURE IN HPA 1015.6 1014.5 1007.0 1011.6 1012.0 1007.6 1005.9 1006.2 1012.9 1013.2 1018.2 1013.1 1005.9 DAY 3 10 14 5 23 13 3 25 6 9 7 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 NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 886.4 883.9 878.2 880.0 878.9 875.6 874.4 874.0 878.9 884.4 885.8 885.7 880.5 MAX. QFE PRESSURE IN HPA 890.9 889.3 884.2 884.1 882.1 879.8 877.7 878.1 883.4 888.3 892.3 893.1 893.1 DAY 17 1 23 22 1 1 28 7 25 28 30 1 MIN. QFE PRESSURE IN HPA 880.1 876.9 870.6 875.2 875.5 871.8 869.4 870.0 876.2 877.4 881.4 876.9 869.4 DAY 3 10 14 5 23 13 3 25 2 9 7 31 MEAN QNH PRESSURE IN HPA 1024.6 1021.8 1015.4 1017.5 1016.3 1012.5 1011.2 1010.7 1016.3 1022.5 1024.0 1023.9 1018.1 MAX. QNH PRESSURE IN HPA 1029.8 1028.0 1022.2 1022.1 1019.9 1017.3 1014.9 1015.4 1021.3 1026.8 1031.3 1032.2 1032.2 DAY 17 1 23 22 1 1 28 7 25 28 30 1 MIN. QNH PRESSURE IN HPA 1017.6 1014.0 1006.9 1012.1 1012.4 1008.3 1005.6 1006.2 1013.2 1014.6 1019.1 1014.0 1005.6 DAY 3 10 14 5 23 13 3 25 2 9 7 31 MEAN QFF PRESSURE IN HPA 1025.8 1021.2 1011.7 1011.0 1007.5 1001.8 999.9 999.7 1007.7 1018.7 1022.6 1024.7 1012.7 MAX. QFF PRESSURE IN HPA 1031.8 1028.2 1021.7 1016.4 1013.3 1010.4 1005.3 1003.9 1013.7 1026.4 1036.2 1037.4 1037.4 DAY 17 12 23 22 1 1 28 7 25 16 30 1 MIN. QFF PRESSURE IN HPA 1016.6 1012.1 1001.1 1002.2 1003.0 997.8 994.1 995.3 1003.3 1007.9 1014.9 1011.9 994.1 DAY 27 10 14 19 23 12 3 25 6 9 8 31 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 NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.3 10.1 14.9 23.0 29.8 33.9 34.7 31.8 29.0 22.1 16.4 10.9 22.1 MINIMUN AIR TEMPERATURE (C) 1.4 2.7 7.1 13.9 18.2 23.6 26.4 22.7 17.4 10.2 5.3 2.9 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 2 27 30 23 6 0 0 0 90 DAYS WITH MINIMUM TEMP. <=-4 3 1 0 0 0 0 0 0 0 0 0 2 6 DAYS WITH FREEZING MIN.<= 0 11 6 0 0 0 0 0 0 0 0 6 4 27 TEMPERATURE RECORDS LOWEST(C) -4.4 -5.4 1.2 4.3 12.4 18.4 18.0 16.0 11.2 6.0 -2.4 -5.4 -5.4 DAY 3 8 25 4 1 1 25 29 27 4 25 30 MAXIMUM AIR TEMPERATURE (C) 12.5 14.5 19.8 27.6 35.0 38.5 39.0 36.5 34.5 28.3 22.9 16.2 27.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 14 28 30 31 31 27 2 0 0 163 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.0 19.0 27.8 33.4 40.6 43.2 43.0 39.8 39.6 30.6 28.8 21.0 43.2 DAY 17 3 22 14 29 25 2 5 6 11 5 7 DIF. BETWEEN (MAX.-MIN.) (C) 11.1 11.8 12.7 13.7 16.8 14.9 12.6 13.8 17.1 18.1 17.6 13.3 14.4 MEAN DAILY TEMP. (MDT) (C) 7.0 8.6 13.5 20.8 26.6 31.1 32.7 29.6 26.0 19.2 14.1 9.5 19.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.6 50.5 174.3 301.6 361.8 265.2 150.9 1.8 0.0 0.0 1306.7 HEATING DEG. DAYS(BASE 18 0C) 342.3 272.2 144.4 25.5 0.0 0.0 0.0 0.0 0.0 5.5 120.8 262.4 1172.9 DEWPOINT (MEAN C) -3.8 -2.7 -0.2 2.8 0.6 1.1 2.9 1.9 1.7 -0.3 -4.6 -0.8 -0.1 MIXING RATIO (G/KG) 3.50 3.82 4.64 5.67 4.67 4.83 5.80 5.16 5.15 4.31 3.29 4.31 4.60 VAPOUR PRESSURE (HPA) 4.94 5.39 6.49 7.94 6.54 6.73 8.04 7.20 7.21 6.08 4.65 6.08 6.44 SATURATION DEF. (HPA) 6.40 7.49 11.37 21.87 37.47 48.24 48.62 41.14 35.02 22.08 15.77 7.72 25.26 RELATIVE HUMIDITY (MEAN %) 47 46 42 30 17 13 15 16 18 24 26 48 29 RELATIVE HUMIDITY (MAX. %) 69 75 70 49 31 20 22 23 28 35 41 70 44 RELATIVE HUMIDITY (MIN. %) 32 28 28 20 11 9 11 11 13 17 16 33 19 RELATIVE HUMIDITY (MEAN% 03UTC) 69 73 70 48 31 20 22 23 28 35 41 69 44 RELATIVE HUMIDITY (MEAN% 09UTC) 37 33 33 22 12 11 12 13 14 19 18 36 22 RELATIVE HUMIDITY (MEAN% 15UTC) 44 40 37 28 14 12 14 15 17 21 24 47 26 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 20.8 20.2 40.0 7.1 0.6 0.0 5.0 0.0 0.7 0.0 0.9 10.0 105.3 DAYS WITH PRECIPITATION >=10 1 1 2 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 2 1 2 1 0 0 1 0 0 0 0 1 8 DAYS WITH PRECIPITATION >= 1 3 3 6 1 0 0 1 0 0 0 0 2 16 DAYS WITH PRECIPITATION 4 8 7 3 1 0 1 0 1 0 1 2 28 GREATEST DAILY PRECIPITATION 13.0 14.0 17.0 7.0 0.6 0.0 5.0 0.0 0.7 0.0 0.9 7.0 17.0 DAY 19 18 24 27 1 ** 28 ** 4 ** 30 21 DAY WITH THUNDER STORM 0 1 0 0 0 0 0 0 0 0 0 1 2 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 1 1 1 1 9 4 0 0 0 3 20 WIND DIRECTION (PREVAILING) 135 135 135 135 270 360 360 360 360 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 7.3 6.9 7.5 6.2 9.3 16.2 25.2 22.4 18.6 7.6 7.4 7.4 7.4 PREVAILING WIND PERCENT 20.0 17.9 22.6 16.7 12.9 23.3 42.6 39.4 22.0 15.5 13.3 11.6 14.4 CALMS PERCENT OF WIND 42.6 37.2 32.3 33.3 31.6 19.3 12.9 14.2 28.0 35.5 56.0 58.7 33.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 226 172 229 238 173 21 19 17 31 88 199 204 21 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.0 0.7 1.3 1.0 3.8 12.2 10.8 5.4 0.9 1.3 1.0 2.2 WIND STEADINESES (MEAN %) 19.1 20.4 12.1 25.0 16.1 39.6 78.2 77.1 61.4 17.6 39.4 30.3 30.6 WIND SPEED (MEAN KNOTS) 4.7 4.9 5.8 5.2 6.2 9.6 15.6 14.0 8.8 5.1 3.3 3.3 7.2 FASTEST WIND DIRECTION 310 300 300 310 10 10 360 360 360 20 300 300 360 FASTEST WIND SPEED (KNOTS) 27 29 23 19 29 43 45 39 33 23 17 37 45 DAY 30 4 28 1 20 14 14 1 30 6 15 29 DAYS WITH SKY CLEAR (0-2)/8 20 13 17 8 24 27 25 27 28 29 20 14 252 DAYS WITH P.CLOUDY (3-6)/8 5 11 10 18 7 3 6 4 2 2 9 8 85 DAYS WITH CLOUDY (7-8)/8 6 5 4 4 0 0 0 0 0 0 1 9 29 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 3 1 0 0 0 2 6 DURATION OF SUNSHINE HOURS 217.7 204.4 241.1 225.1 338.3 346.2 327.3 347.9 313.4 307.9 266.2 183.8 3319.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 883.9 882.6 879.3 880.1 878.0 874.6 871.7 874.0 878.7 883.8 885.6 884.3 879.7 MAX. QFE PRESSURE IN HPA 895.4 891.0 886.8 887.3 884.0 883.2 875.6 878.8 883.5 890.0 891.4 893.5 895.4 DAY-HOUR 3- 6 7- 6 17- 6 3- 6 5- 6 1- 6 11- 6 27- 6 25- 6 17- 6 6- 6 30- 6 MIN. QFE PRESSURE IN HPA 872.2 875.7 870.4 873.9 873.1 867.6 868.8 870.5 874.2 877.7 879.5 877.8 867.6 DAY-HOUR 19-12 25-15 24- 3 15-12 29-15 24-12 17-12 7-12 8-12 7-12 20-12 27-12 MEAN QNH PRESSURE IN HPA 1021.9 1020.4 1016.7 1017.6 1015.2 1011.5 1008.1 1010.7 1016.0 1021.8 1023.7 1022.3 1017.2 MAX. QNH PRESSURE IN HPA 1034.8 1029.9 1025.1 1025.7 1022.0 1021.1 1012.5 1016.1 1021.4 1028.7 1030.3 1032.7 1034.8 DAY-HOUR 3- 6 7- 6 17- 6 3- 6 5- 6 1- 6 11- 6 27- 6 25- 6 17- 6 6- 6 30- 6 MIN. QNH PRESSURE IN HPA 1008.7 1012.7 1006.7 1010.6 1009.7 1003.5 1004.9 1006.8 1011.0 1014.9 1016.9 1015.0 1003.5 DAY-HOUR 19-12 25-15 24- 3 15-12 29-15 24-12 17-12 7-12 8-12 7-12 20-12 27-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 884.2 883.0 879.7 880.8 878.9 875.7 872.3 874.7 879.6 884.6 886.2 884.5 880.3 MAX. QFE PRESSURE IN HPA 893.9 889.2 885.5 886.9 882.7 882.8 875.0 878.6 883.1 889.1 890.6 891.9 893.9 DAY 3 7 17 4 5 1 11 27 25 17 6 30 MIN. QFE PRESSURE IN HPA 877.4 878.4 870.4 875.5 873.8 869.5 869.7 872.0 875.6 881.0 881.6 878.8 869.5 DAY 27 18 24 1 30 25 22 2 1 7 29 28 MEAN QNH PRESSURE IN HPA 1022.2 1020.8 1017.2 1018.3 1016.3 1012.7 1008.8 1011.5 1017.0 1022.6 1024.5 1022.5 1017.9 MAX. QNH PRESSURE IN HPA 1033.1 1027.8 1023.7 1025.3 1020.5 1020.6 1011.9 1015.9 1021.0 1027.7 1029.4 1030.9 1033.1 DAY 3 7 17 4 5 1 11 27 25 17 6 30 MIN. QNH PRESSURE IN HPA 1014.6 1015.7 1006.7 1012.4 1010.5 1005.7 1005.9 1008.5 1012.5 1018.6 1019.3 1016.1 1005.7 DAY 27 18 24 1 30 25 22 2 1 7 29 28 MEAN QFF PRESSURE IN HPA 1023.0 1020.7 1014.6 1011.9 1007.0 1001.1 996.6 1000.9 1008.2 1017.6 1022.4 1022.2 1012.2 MAX. QFF PRESSURE IN HPA 1035.9 1031.2 1022.8 1023.5 1013.3 1011.3 1000.5 1008.1 1014.6 1022.5 1029.8 1035.6 1035.9 DAY 3 8 26 4 6 1 29 27 25 17 26 30 MIN. QFF PRESSURE IN HPA 1013.0 1014.9 1003.7 1003.5 998.7 992.0 993.0 996.8 1002.9 1013.0 1017.2 1013.3 992.0 DAY 27 25 24 16 30 24 22 9 1 7 15 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 885.5 884.3 880.8 881.6 879.5 876.1 872.7 875.3 880.2 885.4 887.3 885.9 881.2 MAX. QFE PRESSURE IN HPA 895.4 891.0 886.8 887.3 884.0 883.2 875.6 878.8 883.5 890.0 891.4 893.5 895.4 DAY 3 7 17 3 5 1 11 27 25 17 6 30 MIN. QFE PRESSURE IN HPA 878.6 880.2 871.3 876.2 874.6 869.9 870.4 872.7 876.2 881.1 882.7 880.2 869.9 DAY 29 18 24 1 30 24 18 2 1 7 29 26 MEAN QNH PRESSURE IN HPA 1023.7 1022.3 1018.4 1019.3 1016.9 1013.1 1009.3 1012.2 1017.7 1023.5 1025.7 1024.1 1018.8 MAX. QNH PRESSURE IN HPA 1034.8 1029.9 1025.1 1025.7 1022.0 1021.1 1012.5 1016.1 1021.4 1028.7 1030.3 1032.7 1034.8 DAY 3 7 17 3 5 1 11 27 25 17 6 30 MIN. QNH PRESSURE IN HPA 1015.9 1017.7 1007.7 1013.2 1011.4 1006.1 1006.7 1009.3 1013.2 1018.7 1020.5 1017.7 1006.1 DAY 29 18 24 1 30 24 18 2 1 7 29 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 883.8 882.7 879.5 880.4 878.3 874.8 871.9 874.2 878.7 883.5 885.1 883.9 879.7 MAX. QFE PRESSURE IN HPA 893.3 889.9 886.2 886.2 882.8 881.6 874.2 877.5 882.1 887.2 889.0 891.0 893.3 DAY 3 7 17 12 5 1 11 26 30 17 6 30 MIN. QFE PRESSURE IN HPA 876.3 878.3 871.8 875.7 873.9 868.5 869.9 871.4 875.1 878.5 880.4 878.7 868.5 DAY 29 25 24 15 30 24 17 2 1 7 20 26 MEAN QNH PRESSURE IN HPA 1021.8 1020.6 1017.0 1017.9 1015.5 1011.7 1008.4 1010.9 1016.0 1021.5 1023.2 1021.9 1017.2 MAX. QNH PRESSURE IN HPA 1032.5 1028.6 1024.5 1024.5 1020.6 1019.3 1011.0 1014.7 1019.9 1025.6 1027.6 1029.9 1032.5 DAY 3 7 17 12 5 1 11 26 30 17 6 30 MIN. QNH PRESSURE IN HPA 1013.3 1015.6 1008.3 1012.7 1010.6 1004.6 1006.1 1007.8 1012.0 1015.8 1017.9 1016.0 1004.6 DAY 29 25 24 15 30 24 17 2 1 7 20 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 882.6 881.3 878.0 878.7 876.6 873.3 870.8 872.8 877.3 882.4 884.1 883.1 878.4 MAX. QFE PRESSURE IN HPA 891.3 888.2 884.0 884.2 880.4 879.7 872.9 876.3 881.4 886.1 887.8 889.4 891.3 DAY 3 7 17 12 4 1 11 21 30 16 6 29 MIN. QFE PRESSURE IN HPA 872.2 876.5 873.3 873.9 873.4 867.6 868.8 870.5 874.2 877.7 879.5 877.8 867.6 DAY 19 25 5 15 23 24 17 7 8 7 20 27 MEAN QNH PRESSURE IN HPA 1020.4 1019.0 1015.2 1016.0 1013.7 1010.0 1007.1 1009.3 1014.5 1020.2 1022.2 1021.0 1015.7 MAX. QNH PRESSURE IN HPA 1030.2 1026.7 1022.0 1022.2 1017.9 1017.2 1009.5 1013.3 1019.1 1024.4 1026.3 1028.1 1030.2 DAY 3 7 17 12 4 1 11 21 30 16 6 29 MIN. QNH PRESSURE IN HPA 1008.7 1013.6 1010.0 1010.6 1010.1 1003.5 1004.9 1006.8 1011.0 1014.9 1016.9 1015.0 1003.5 DAY 19 25 5 15 23 24 17 7 8 7 20 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 NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 883.4 881.9 878.5 878.9 876.8 873.3 870.7 873.0 877.7 883.2 885.1 884.1 878.9 MAX. QFE PRESSURE IN HPA 891.6 888.7 884.3 884.6 881.2 880.0 872.9 876.3 881.8 887.3 889.0 890.8 891.6 DAY 3 7 17 12 5 1 23 26 30 16 5 29 MIN. QFE PRESSURE IN HPA 873.0 875.7 872.7 873.9 873.1 867.8 869.0 870.5 874.6 879.0 880.6 878.0 867.8 DAY 19 25 5 15 29 24 1 7 2 7 20 27 MEAN QNH PRESSURE IN HPA 1021.3 1019.6 1015.8 1016.3 1013.9 1010.0 1007.1 1009.6 1014.9 1021.1 1023.2 1022.1 1016.2 MAX. QNH PRESSURE IN HPA 1030.5 1027.3 1022.3 1022.7 1018.8 1017.5 1009.5 1013.3 1019.5 1025.7 1027.6 1029.6 1030.5 DAY 3 7 17 12 5 1 23 26 30 16 5 29 MIN. QNH PRESSURE IN HPA 1009.6 1012.7 1009.3 1010.6 1009.7 1003.8 1005.1 1006.8 1011.4 1016.4 1018.2 1015.2 1003.8 DAY 19 25 5 15 29 24 1 7 2 7 20 27 MEAN QFF PRESSURE IN HPA 1022.1 1019.5 1013.1 1009.8 1004.5 998.3 994.9 999.0 1006.1 1016.0 1021.1 1021.8 1010.5 MAX. QFF PRESSURE IN HPA 1033.8 1030.4 1021.4 1020.2 1012.1 1008.0 998.9 1004.4 1012.8 1020.5 1028.9 1032.0 1033.8 DAY 3 7 17 3 5 1 23 26 30 27 25 30 MIN. QFF PRESSURE IN HPA 1008.5 1008.9 1005.2 1002.1 998.4 990.2 992.0 994.7 1001.0 1010.8 1015.0 1012.0 990.2 DAY 19 25 5 15 29 24 1 7 5 7 14 28 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.8 6.4 14.8 21.2 26.5 33.2 33.6 31.7 28.3 23.2 16.2 11.0 21.0 MINIMUN AIR TEMPERATURE (C) -2.2 -1.2 6.9 12.4 15.5 23.5 25.7 23.7 16.1 11.4 7.2 3.3 11.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 23 31 25 2 1 0 0 86 DAYS WITH MINIMUM TEMP. <=-4 11 11 0 0 0 0 0 0 0 0 0 0 22 DAYS WITH FREEZING MIN.<= 0 24 16 1 0 0 0 0 0 0 0 0 11 52 TEMPERATURE RECORDS LOWEST(C) -6.0 -6.6 -0.4 3.4 4.2 18.8 21.0 17.6 10.6 6.6 2.6 -2.6 -6.6 DAY 6 7 1 1 2 10 6 21 26 28 25 30 MAXIMUM AIR TEMPERATURE (C) 10.6 11.2 19.3 25.5 31.5 37.5 37.6 36.1 34.8 29.6 21.5 16.1 25.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 5 21 30 30 31 28 14 0 0 159 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 14.6 17.6 25.4 31.6 39.6 40.6 42.0 39.6 38.6 34.6 25.8 21.6 42.0 DAY 24 22 11 16 28 12 9 11 15 3 1 4 DIF. BETWEEN (MAX.-MIN.) (C) 12.8 12.4 12.4 13.1 16.0 14.0 11.9 12.4 18.7 18.2 14.3 12.8 14.0 MEAN DAILY TEMP. (MDT) (C) 4.2 5.0 13.1 18.9 23.5 30.5 31.6 29.9 25.5 20.5 14.3 9.7 18.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 14.5 112.8 283.8 319.0 275.7 136.0 35.8 0.0 0.0 1177.6 HEATING DEG. DAYS(BASE 18 0C) 427.3 363.3 151.6 34.8 19.8 0.0 0.0 0.0 0.0 5.8 110.4 258.1 1371.1 DEWPOINT (MEAN C) -5.6 -6.9 -0.7 -0.3 -0.6 -0.4 -0.9 0.3 -0.6 -0.6 1.5 0.6 -1.2 MIXING RATIO (G/KG) 2.97 2.77 4.37 4.42 4.30 4.38 4.23 4.59 4.35 4.27 4.97 4.77 4.20 VAPOUR PRESSURE (HPA) 4.19 3.92 6.12 6.21 6.04 6.12 5.90 6.41 6.09 6.02 7.02 6.72 5.90 SATURATION DEF. (HPA) 5.44 6.22 11.51 20.31 31.06 46.09 47.27 41.43 34.71 24.38 12.21 7.11 23.98 RELATIVE HUMIDITY (MEAN %) 46 43 39 27 19 12 12 14 17 22 40 52 29 RELATIVE HUMIDITY (MAX. %) 69 63 58 43 30 18 17 19 30 31 62 77 43 RELATIVE HUMIDITY (MIN. %) 33 29 28 18 13 9 8 11 12 17 28 36 20 RELATIVE HUMIDITY (MEAN% 03UTC) 67 61 57 42 30 17 17 19 30 31 62 76 42 RELATIVE HUMIDITY (MEAN% 09UTC) 38 36 33 21 15 11 10 13 13 19 32 40 23 RELATIVE HUMIDITY (MEAN% 15UTC) 41 36 34 24 16 11 10 13 15 20 35 49 25 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.6 9.0 48.2 4.4 0.0 0.1 0.0 0.0 0.0 0.0 8.4 13.3 84.0 DAYS WITH PRECIPITATION >=10 0 0 1 0 0 0 0 0 0 0 0 1 2 DAYS WITH PRECIPITATION >= 5 0 1 3 0 0 0 0 0 0 0 1 1 6 DAYS WITH PRECIPITATION >= 1 0 4 4 2 0 0 0 0 0 0 2 2 14 DAYS WITH PRECIPITATION 2 5 6 2 0 1 0 0 0 0 3 3 22 GREATEST DAILY PRECIPITATION 0.6 5.0 30.0 2.4 0.0 0.1 0.0 0.0 0.0 0.0 7.0 12.0 30.0 DAY 4 23 21 30 ** 7 ** ** ** ** 3 16 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 1 1 7 0 0 2 12 1 1 0 0 2 27 WIND DIRECTION (PREVAILING) 135 135 135 135 135 360 360 360 135 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 6.6 7.5 8.3 6.2 8.8 19.2 22.5 19.6 8.2 7.9 5.9 7.6 7.5 PREVAILING WIND PERCENT 20.0 15.7 18.7 17.3 20.6 32.0 51.6 50.3 17.3 14.2 23.3 20.0 15.0 CALMS PERCENT OF WIND 41.3 43.6 32.9 27.3 18.7 10.7 5.8 12.3 42.0 43.9 49.3 55.5 31.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 187 187 217 48 63 33 18 13 62 36 204 168 28 VECTOR WIND MAGNITUDE(KNOTS) 1.1 1.0 1.9 2.1 2.4 8.7 16.7 12.6 2.9 0.9 1.3 1.7 3.2 WIND STEADINESES (MEAN %) 26.2 21.7 31.7 34.4 29.3 67.4 88.4 87.5 47.5 17.0 38.2 53.1 41.0 WIND SPEED (MEAN KNOTS) 4.2 4.6 6.0 6.1 8.2 12.9 18.9 14.4 6.1 5.3 3.4 3.2 7.8 FASTEST WIND DIRECTION 280 300 220 350 360 10 10 360 40 10 240 240 10 FASTEST WIND SPEED (KNOTS) 19 29 27 31 27 41 47 35 33 29 17 14 47 DAY 5 15 16 30 26 28 21 5 3 9 17 17 DAYS WITH SKY CLEAR (0-2)/8 24 13 12 10 21 28 30 31 28 29 17 16 259 DAYS WITH P.CLOUDY (3-6)/8 5 10 13 15 9 2 1 0 2 2 13 11 83 DAYS WITH CLOUDY (7-8)/8 2 5 6 5 1 0 0 0 0 0 0 4 23 DAYS WITH VISIBILITY =< 2 KM 1 1 1 0 0 1 6 0 0 0 0 2 12 DURATION OF SUNSHINE HOURS 245.6 170.0 200.9 237.6 330.6 343.8 361.6 369.4 ****** 168.1 237.0 221.5 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 883.1 884.2 879.8 881.5 879.9 875.7 874.1 875.3 878.6 883.8 885.7 884.3 880.5 MAX. QFE PRESSURE IN HPA 890.1 891.6 887.3 887.3 884.9 879.5 877.5 880.0 887.6 892.3 890.7 890.0 892.3 DAY-HOUR 27- 6 8- 6 1- 6 9- 6 2- 6 3- 6 8- 6 31- 6 23- 6 27- 6 29- 6 1- 6 MIN. QFE PRESSURE IN HPA 874.1 871.9 870.8 873.8 874.6 871.1 870.8 869.2 873.5 877.6 881.0 878.8 869.2 DAY-HOUR 12-12 23- 9 30-12 30- 3 31-12 8-12 31-15 1-12 12-12 2-12 20-12 5-12 MEAN QNH PRESSURE IN HPA 1021.0 1022.2 1017.2 1019.2 1017.3 1012.7 1010.9 1012.2 1015.9 1021.8 1023.9 1022.3 1018.1 MAX. QNH PRESSURE IN HPA 1028.9 1030.5 1025.7 1025.7 1023.0 1016.9 1014.7 1017.5 1026.0 1031.3 1029.5 1028.7 1031.3 DAY-HOUR 27- 6 8- 6 1- 6 9- 6 2- 6 3- 6 8- 6 31- 6 23- 6 27- 6 29- 6 1- 6 MIN. QNH PRESSURE IN HPA 1010.9 1008.4 1007.1 1010.5 1011.4 1007.5 1007.1 1005.3 1010.2 1014.8 1018.6 1016.1 1005.3 DAY-HOUR 12-12 23- 9 30-12 30- 3 31-12 8-12 31-15 1-12 12-12 2-12 20-12 5-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 883.2 884.4 880.3 882.3 881.0 876.8 874.8 876.0 879.5 884.7 886.2 884.8 881.2 MAX. QFE PRESSURE IN HPA 888.6 890.0 886.0 886.6 884.5 879.2 877.3 879.2 886.6 891.1 889.9 888.9 891.1 DAY 22 8 1 9 2 3 8 31 23 27 29 1 MIN. QFE PRESSURE IN HPA 874.5 873.7 873.8 873.8 877.5 873.7 872.3 872.7 876.1 879.1 882.8 881.4 872.3 DAY 5 23 30 30 27 30 13 2 12 2 20 5 MEAN QNH PRESSURE IN HPA 1021.1 1022.5 1017.8 1020.0 1018.6 1013.9 1011.7 1013.0 1016.9 1022.7 1024.5 1022.9 1018.8 MAX. QNH PRESSURE IN HPA 1027.2 1028.7 1024.2 1024.9 1022.6 1016.6 1014.5 1016.6 1024.9 1030.0 1028.6 1027.5 1030.0 DAY 22 8 1 9 2 3 8 31 23 27 29 1 MIN. QNH PRESSURE IN HPA 1011.3 1010.4 1010.5 1010.5 1014.7 1010.4 1008.8 1009.3 1013.1 1016.5 1020.6 1019.1 1008.8 DAY 5 23 30 30 27 30 13 2 12 2 20 5 MEAN QFF PRESSURE IN HPA 1023.7 1024.6 1015.2 1014.5 1010.8 1002.6 999.9 1002.2 1008.8 1017.3 1021.9 1022.7 1013.7 MAX. QFF PRESSURE IN HPA 1031.1 1033.2 1025.2 1023.8 1021.1 1005.8 1002.1 1006.8 1019.8 1026.1 1026.3 1026.2 1033.2 DAY 31 8 1 1 2 3 4 21 24 27 26 26 MIN. QFF PRESSURE IN HPA 1011.1 1007.7 1005.0 1003.0 1003.1 998.1 996.7 997.8 1002.9 1007.6 1017.3 1014.8 996.7 DAY 5 23 29 30 27 30 13 12 5 2 20 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 884.8 885.7 881.4 883.0 881.3 877.1 875.2 876.6 880.1 885.5 887.3 886.0 882.0 MAX. QFE PRESSURE IN HPA 890.1 891.6 887.3 887.3 884.9 879.5 877.5 880.0 887.6 892.3 890.7 890.0 892.3 DAY 27 8 1 9 2 3 8 31 23 27 29 1 MIN. QFE PRESSURE IN HPA 877.6 872.2 873.1 874.7 877.4 874.4 872.6 872.6 876.5 880.0 883.9 882.2 872.2 DAY 5 23 30 30 27 30 21 1 12 2 17 5 MEAN QNH PRESSURE IN HPA 1022.9 1023.9 1019.1 1020.9 1019.0 1014.2 1012.1 1013.6 1017.6 1023.6 1025.8 1024.2 1019.7 MAX. QNH PRESSURE IN HPA 1028.9 1030.5 1025.7 1025.7 1023.0 1016.9 1014.7 1017.5 1026.0 1031.3 1029.5 1028.7 1031.3 DAY 27 8 1 9 2 3 8 31 23 27 29 1 MIN. QNH PRESSURE IN HPA 1014.8 1008.7 1009.7 1011.5 1014.6 1011.2 1009.2 1009.2 1013.6 1017.5 1021.9 1020.0 1008.7 DAY 5 23 30 30 27 30 21 1 12 2 17 5 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 882.9 884.2 879.9 881.8 879.9 875.9 874.4 875.4 878.6 883.6 885.3 883.8 880.5 MAX. QFE PRESSURE IN HPA 888.9 889.3 885.1 886.3 883.1 878.4 876.4 879.2 885.8 889.7 888.2 887.3 889.7 DAY 27 8 1 9 4 3 8 31 23 27 26 1 MIN. QFE PRESSURE IN HPA 875.5 871.9 871.3 875.7 876.3 872.6 872.4 870.7 874.7 878.7 881.8 879.2 870.7 DAY 12 23 30 30 27 8 13 1 12 2 20 5 MEAN QNH PRESSURE IN HPA 1020.8 1022.2 1017.4 1019.5 1017.4 1012.9 1011.1 1012.4 1015.9 1021.5 1023.4 1021.8 1018.0 MAX. QNH PRESSURE IN HPA 1027.5 1028.0 1023.2 1024.6 1021.0 1015.7 1013.4 1016.6 1024.0 1028.4 1026.7 1025.7 1028.4 DAY 27 8 1 9 4 3 8 31 23 27 26 1 MIN. QNH PRESSURE IN HPA 1012.4 1008.4 1007.7 1012.7 1013.3 1009.2 1008.9 1007.0 1011.5 1016.0 1019.5 1016.6 1007.0 DAY 12 23 30 30 27 8 13 1 12 2 20 5 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 881.9 882.9 878.4 880.1 878.4 874.5 873.1 874.1 877.2 882.3 884.3 882.9 879.2 MAX. QFE PRESSURE IN HPA 887.4 888.2 884.0 884.4 882.2 876.4 875.7 877.4 884.4 888.4 887.6 886.2 888.4 DAY 27 8 31 9 4 3 10 31 23 27 26 1 MIN. QFE PRESSURE IN HPA 874.1 872.6 870.8 874.7 874.6 871.1 871.0 869.2 873.5 877.6 881.0 878.8 869.2 DAY 12 23 30 29 31 8 31 1 12 2 20 5 MEAN QNH PRESSURE IN HPA 1019.6 1020.8 1015.6 1017.6 1015.7 1011.3 1009.7 1010.8 1014.3 1020.1 1022.4 1020.8 1016.6 MAX. QNH PRESSURE IN HPA 1025.8 1026.7 1022.0 1022.4 1020.0 1013.4 1012.7 1014.6 1022.4 1026.9 1026.0 1024.5 1026.9 DAY 27 8 31 9 4 3 10 31 23 27 26 1 MIN. QNH PRESSURE IN HPA 1010.9 1009.2 1007.1 1011.5 1011.4 1007.5 1007.4 1005.3 1010.2 1014.8 1018.6 1016.1 1005.3 DAY 12 23 30 29 31 8 31 1 12 2 20 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 882.8 883.8 878.9 880.5 878.8 874.5 873.2 874.4 877.7 883.3 885.5 884.1 879.8 MAX. QFE PRESSURE IN HPA 888.1 888.9 885.3 884.6 883.1 876.6 875.4 877.7 884.7 889.2 888.4 888.0 889.2 DAY 27 8 31 3 4 2 10 31 23 27 28 1 MIN. QFE PRESSURE IN HPA 875.8 877.4 871.0 874.4 874.6 871.1 870.8 869.2 874.0 878.1 882.6 880.6 869.2 DAY 4 23 30 29 31 8 31 1 12 2 20 5 MEAN QNH PRESSURE IN HPA 1020.7 1021.7 1016.2 1018.1 1016.1 1011.3 1009.8 1011.2 1014.8 1021.2 1023.6 1022.1 1017.2 MAX. QNH PRESSURE IN HPA 1026.6 1027.5 1023.5 1022.7 1021.0 1013.7 1012.3 1014.9 1022.8 1027.8 1026.9 1026.5 1027.8 DAY 27 8 31 3 4 2 10 31 23 27 28 1 MIN. QNH PRESSURE IN HPA 1012.8 1014.6 1007.4 1011.2 1011.4 1007.5 1007.1 1005.3 1010.7 1015.4 1020.4 1018.2 1005.3 DAY 4 23 30 29 31 8 31 1 12 2 20 5 MEAN QFF PRESSURE IN HPA 1023.2 1023.7 1013.6 1012.4 1008.1 1000.1 998.1 1000.5 1006.7 1015.6 1021.0 1021.9 1012.1 MAX. QFF PRESSURE IN HPA 1029.6 1031.4 1022.7 1020.1 1018.0 1002.5 1000.8 1005.0 1017.4 1024.1 1025.6 1026.5 1031.4 DAY 27 8 31 3 4 3 20 31 23 27 26 25 MIN. QFF PRESSURE IN HPA 1012.2 1012.9 1003.0 1003.4 1000.4 996.9 996.3 994.9 1001.7 1006.2 1016.4 1013.9 994.9 DAY 4 23 30 29 27 11 12 1 19 2 20 5 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 NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.2 9.4 14.9 22.1 29.8 33.4 33.6 33.3 29.0 22.0 16.2 9.1 21.7 MINIMUN AIR TEMPERATURE (C) 1.9 3.6 5.8 12.8 19.2 24.1 25.5 23.7 17.5 10.7 5.3 1.4 12.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 5 23 31 28 6 0 0 0 94 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 4 4 DAYS WITH FREEZING MIN.<= 0 8 3 1 0 0 0 0 0 0 0 1 10 23 TEMPERATURE RECORDS LOWEST(C) -3.6 -2.6 -0.6 6.4 13.6 16.2 21.6 18.4 9.0 3.6 -0.4 -6.0 -6.0 DAY 31 1 22 12 16 3 14 30 30 20 19 30 MAXIMUM AIR TEMPERATURE (C) 11.5 13.6 20.4 27.2 35.3 37.9 38.0 38.8 34.9 28.3 22.6 14.5 26.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 8 29 29 31 31 29 6 0 0 164 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.6 18.8 30.4 34.6 39.4 42.5 40.8 42.8 39.0 34.2 28.0 22.0 42.8 DAY 25 20 14 28 27 28 30 11 3 3 10 6 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 10.0 14.6 14.4 16.1 13.8 12.5 15.1 17.4 17.6 17.3 13.1 14.3 MEAN DAILY TEMP. (MDT) (C) 6.7 8.6 13.1 20.0 27.3 31.0 31.7 31.3 26.2 19.5 13.9 8.0 19.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 34.5 195.0 299.5 333.0 317.9 157.6 14.1 0.0 0.0 1351.7 HEATING DEG. DAYS(BASE 18 0C) 349.5 264.1 157.1 23.6 0.0 0.0 0.0 0.0 0.0 22.1 122.6 311.1 1250.1 DEWPOINT (MEAN C) 0.8 1.0 -1.0 3.7 6.4 2.6 2.6 2.2 3.0 0.5 -0.9 -1.6 1.6 MIXING RATIO (G/KG) 4.83 4.92 4.10 5.83 7.05 5.34 5.47 5.29 5.61 4.64 4.23 4.05 5.11 VAPOUR PRESSURE (HPA) 6.81 6.90 5.78 8.16 9.83 7.44 7.60 7.38 7.84 6.54 5.98 5.73 7.17 SATURATION DEF. (HPA) 3.69 5.31 12.50 20.05 33.74 45.53 45.40 45.48 34.23 21.67 13.93 6.76 24.02 RELATIVE HUMIDITY (MEAN %) 68 60 38 34 25 15 15 15 20 25 32 51 33 RELATIVE HUMIDITY (MAX. %) 90 87 60 55 40 23 23 23 28 35 45 68 48 RELATIVE HUMIDITY (MIN. %) 51 44 26 22 17 11 11 10 15 19 25 40 24 RELATIVE HUMIDITY (MEAN% 03UTC) 87 86 59 54 40 22 22 23 27 35 45 66 47 RELATIVE HUMIDITY (MEAN% 09UTC) 57 51 30 26 19 13 13 12 17 21 27 44 28 RELATIVE HUMIDITY (MEAN% 15UTC) 65 54 33 29 23 14 13 14 18 23 30 50 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 49.8 17.2 20.2 12.1 8.0 0.0 0.0 0.0 0.0 0.0 0.0 22.3 129.6 DAYS WITH PRECIPITATION >=10 1 0 1 0 0 0 0 0 0 0 0 1 3 DAYS WITH PRECIPITATION >= 5 5 2 2 1 1 0 0 0 0 0 0 2 13 DAYS WITH PRECIPITATION >= 1 9 3 3 3 4 0 0 0 0 0 0 4 26 DAYS WITH PRECIPITATION 14 12 4 5 4 0 0 0 0 0 1 5 45 GREATEST DAILY PRECIPITATION 14.0 7.0 13.1 6.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 12.0 14.0 DAY 20 7 20 2 8 ** ** ** ** ** ** 27 DAY WITH THUNDER STORM 0 1 0 0 3 0 0 0 0 0 0 0 4 DAYS WITH SNOW OR SLEET 2 0 1 0 0 0 0 0 0 0 0 1 4 DAYS WITH DUST 0 0 0 0 4 1 9 5 0 0 0 1 20 WIND DIRECTION (PREVAILING) 135 135 135 135 45 360 360 360 360 135 135 135 360 PREVAILING WIND SPEED(KNOTS) 5.9 7.3 8.8 9.5 13.8 17.5 22.6 23.0 18.3 9.0 7.1 6.9 20.2 PREVAILING WIND PERCENT 15.5 31.4 18.1 21.3 16.8 41.3 52.3 38.7 24.7 18.1 18.7 17.4 15.2 CALMS PERCENT OF WIND 47.7 34.3 37.4 28.0 22.6 14.0 11.6 20.6 33.3 43.2 54.0 53.5 33.4 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 239 142 37 197 56 15 15 16 28 190 168 196 24 VECTOR WIND MAGNITUDE(KNOTS) 1.4 2.0 0.7 1.5 3.7 10.4 14.2 10.4 6.1 1.6 1.5 1.7 3.0 WIND STEADINESES (MEAN %) 36.8 40.0 10.9 22.1 36.3 82.5 86.6 80.0 67.0 34.8 48.4 48.6 38.0 WIND SPEED (MEAN KNOTS) 3.8 5.0 6.4 6.8 10.2 12.6 16.4 13.0 9.1 4.6 3.1 3.5 7.9 FASTEST WIND DIRECTION 310 330 360 300 360 360 360 360 10 70 130 250 360 FASTEST WIND SPEED (KNOTS) 29 27 31 25 35 31 47 41 33 17 16 19 47 DAY 26 16 26 14 9 21 27 12 9 6 1 26 DAYS WITH SKY CLEAR (0-2)/8 7 14 23 13 23 30 30 31 30 27 26 20 274 DAYS WITH P.CLOUDY (3-6)/8 15 7 5 14 8 0 1 0 0 4 4 9 67 DAYS WITH CLOUDY (7-8)/8 9 7 3 3 0 0 0 0 0 0 0 2 24 DAYS WITH VISIBILITY =< 2 KM 0 3 0 0 0 0 0 1 0 0 0 2 6 DURATION OF SUNSHINE HOURS 189.2 205.0 285.5 261.4 328.1 342.9 366.5 353.3 325.5 291.0 277.5 222.9 3448.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 883.9 881.1 882.9 879.0 877.8 874.5 872.8 874.9 878.1 884.0 886.1 884.9 880.0 MAX. QFE PRESSURE IN HPA 891.4 891.4 891.5 885.0 882.7 879.6 877.4 879.0 883.4 891.8 892.9 892.9 892.9 DAY-HOUR 27- 6 1- 6 10- 6 26- 6 16- 6 5- 3 15- 6 31- 6 26- 6 19- 6 23- 6 5- 6 MIN. QFE PRESSURE IN HPA 875.5 871.4 874.2 870.8 868.1 869.9 867.7 871.3 873.3 878.7 877.7 876.0 867.7 DAY-HOUR 2-12 16- 9 25-12 16-15 13-12 27-12 4-15 8-12 3-12 1-12 1-12 25-15 MEAN QNH PRESSURE IN HPA 1021.9 1018.8 1020.8 1016.4 1015.0 1011.2 1009.4 1011.8 1015.4 1021.9 1024.3 1023.0 1017.5 MAX. QNH PRESSURE IN HPA 1030.3 1030.3 1030.4 1023.1 1020.5 1017.0 1014.6 1016.4 1021.3 1030.8 1032.0 1032.0 1032.0 DAY-HOUR 27- 6 1- 6 10- 6 26- 6 16- 6 5- 3 15- 6 31- 6 26- 6 19- 6 23- 6 5- 6 MIN. QNH PRESSURE IN HPA 1012.4 1007.8 1011.0 1007.1 1004.1 1006.1 1003.7 1007.7 1010.0 1016.0 1014.9 1013.0 1003.7 DAY-HOUR 2-12 16- 9 25-12 16-15 13-12 27-12 4-15 8-12 3-12 1-12 1-12 25-15 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 884.0 881.6 883.4 879.7 878.8 875.5 873.6 875.9 878.9 884.8 886.6 885.1 880.7 MAX. QFE PRESSURE IN HPA 890.3 890.0 889.9 884.0 882.6 879.6 876.8 878.4 883.0 891.1 891.9 891.5 891.9 DAY 27 1 10 26 16 5 14 29 26 19 24 5 MIN. QFE PRESSURE IN HPA 878.0 872.2 877.0 872.7 872.2 871.6 869.7 873.4 876.4 881.1 879.9 876.0 869.7 DAY 2 16 25 16 13 29 4 12 3 1 1 26 MEAN QNH PRESSURE IN HPA 1022.0 1019.3 1021.4 1017.2 1016.2 1012.4 1010.3 1012.9 1016.2 1022.9 1025.0 1023.3 1018.3 MAX. QNH PRESSURE IN HPA 1029.1 1028.7 1028.6 1022.0 1020.4 1017.0 1013.9 1015.7 1020.9 1030.0 1030.9 1030.4 1030.9 DAY 27 1 10 26 16 5 14 29 26 19 24 5 MIN. QNH PRESSURE IN HPA 1015.2 1008.7 1014.1 1009.3 1008.7 1008.0 1005.9 1010.1 1013.4 1018.7 1017.4 1013.0 1005.9 DAY 2 16 25 16 13 29 4 12 3 1 1 26 MEAN QFF PRESSURE IN HPA 1022.9 1019.2 1019.2 1011.1 1006.7 1001.0 998.7 1001.8 1007.5 1017.9 1022.9 1024.0 1012.7 MAX. QFF PRESSURE IN HPA 1032.9 1032.1 1026.6 1017.8 1013.1 1007.0 1003.4 1005.9 1014.5 1027.7 1030.5 1032.5 1032.9 DAY 27 1 22 2 16 2 14 31 26 19 24 29 MIN. QFF PRESSURE IN HPA 1014.8 1006.0 1009.8 1000.6 996.9 994.2 993.9 996.8 1002.6 1012.6 1013.3 1011.4 993.9 DAY 2 16 15 16 13 29 4 12 13 3 1 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 885.6 882.8 884.6 880.5 879.3 875.7 874.0 876.2 879.5 885.7 887.7 886.6 881.5 MAX. QFE PRESSURE IN HPA 891.4 891.4 891.5 885.0 882.7 879.3 877.4 879.0 883.4 891.8 892.9 892.9 892.9 DAY 27 1 10 26 16 4 15 31 26 19 23 5 MIN. QFE PRESSURE IN HPA 878.4 872.0 877.9 873.7 872.2 871.7 870.2 873.9 877.0 882.0 880.7 878.2 870.2 DAY 2 16 25 16 13 27 4 1 3 2 1 26 MEAN QNH PRESSURE IN HPA 1023.8 1020.7 1022.6 1018.1 1016.7 1012.7 1010.7 1013.2 1017.0 1023.9 1026.2 1024.9 1019.2 MAX. QNH PRESSURE IN HPA 1030.3 1030.3 1030.4 1023.1 1020.5 1016.7 1014.6 1016.4 1021.3 1030.8 1032.0 1032.0 1032.0 DAY 27 1 10 26 16 4 15 31 26 19 23 5 MIN. QNH PRESSURE IN HPA 1015.7 1008.5 1015.1 1010.4 1008.7 1008.2 1006.5 1010.6 1014.1 1019.7 1018.3 1015.5 1006.5 DAY 2 16 25 16 13 27 4 1 3 2 1 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 883.7 881.2 883.1 879.1 878.0 874.6 873.0 875.1 878.1 883.6 885.7 884.8 880.0 MAX. QFE PRESSURE IN HPA 889.1 888.9 889.7 884.0 882.0 878.1 876.2 878.0 882.0 889.8 890.9 890.7 890.9 DAY 27 1 10 26 18 4 15 31 26 19 23 5 MIN. QFE PRESSURE IN HPA 876.1 871.4 875.9 873.0 870.2 870.9 869.3 872.8 875.5 880.3 878.9 878.2 869.3 DAY 2 16 25 16 13 27 4 13 3 1 1 26 MEAN QNH PRESSURE IN HPA 1021.7 1018.8 1021.0 1016.5 1015.2 1011.4 1009.6 1011.9 1015.3 1021.6 1023.9 1022.9 1017.5 MAX. QNH PRESSURE IN HPA 1027.7 1027.5 1028.4 1022.0 1019.7 1015.4 1013.2 1015.2 1019.7 1028.5 1029.8 1029.5 1029.8 DAY 27 1 10 26 18 4 15 31 26 19 23 5 MIN. QNH PRESSURE IN HPA 1013.1 1007.8 1012.9 1009.6 1006.5 1007.3 1005.5 1009.4 1012.4 1017.8 1016.3 1015.5 1005.5 DAY 2 16 25 16 13 27 4 13 3 1 1 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 882.7 879.7 881.5 877.7 876.2 873.2 871.7 873.7 876.8 882.5 884.7 883.8 878.7 MAX. QFE PRESSURE IN HPA 887.3 887.6 887.8 882.7 880.5 876.6 875.2 876.0 881.0 888.3 890.3 889.5 890.3 DAY 27 1 10 3 18 4 15 31 26 19 22 5 MIN. QFE PRESSURE IN HPA 875.5 871.4 874.2 871.7 868.1 869.9 868.0 871.3 873.3 878.7 877.7 877.0 868.0 DAY 2 16 25 16 13 27 4 8 3 1 1 25 MEAN QNH PRESSURE IN HPA 1020.5 1017.1 1019.2 1014.9 1013.2 1009.8 1008.2 1010.4 1013.9 1020.3 1022.8 1021.7 1016.0 MAX. QNH PRESSURE IN HPA 1025.7 1026.0 1026.3 1020.5 1018.1 1013.7 1012.1 1013.0 1018.6 1026.8 1029.1 1028.2 1029.1 DAY 27 1 10 3 18 4 15 31 26 19 22 5 MIN. QNH PRESSURE IN HPA 1012.4 1007.8 1011.0 1008.2 1004.1 1006.1 1004.0 1007.7 1010.0 1016.0 1014.9 1014.1 1004.0 DAY 2 16 25 16 13 27 4 8 3 1 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 883.7 880.5 882.1 878.1 876.6 873.3 872.0 873.9 877.3 883.2 885.7 884.5 879.2 MAX. QFE PRESSURE IN HPA 888.9 888.1 887.6 883.3 880.6 877.0 875.6 876.0 881.6 888.4 891.7 889.9 891.7 DAY 26 1 10 3 17 4 15 31 26 19 22 4 MIN. QFE PRESSURE IN HPA 878.6 872.6 874.8 870.8 868.5 870.1 867.7 871.5 873.3 879.5 878.9 876.0 867.7 DAY 2 16 25 16 13 23 4 8 3 1 1 25 MEAN QNH PRESSURE IN HPA 1021.7 1018.0 1019.8 1015.4 1013.7 1010.0 1008.5 1010.6 1014.4 1021.1 1023.9 1022.5 1016.6 MAX. QNH PRESSURE IN HPA 1027.5 1026.6 1026.0 1021.2 1018.2 1014.1 1012.5 1013.0 1019.3 1026.9 1030.7 1028.6 1030.7 DAY 26 1 10 3 17 4 15 31 26 19 22 4 MIN. QNH PRESSURE IN HPA 1015.9 1009.2 1011.6 1007.1 1004.6 1006.4 1003.7 1007.9 1010.0 1016.9 1016.3 1013.0 1003.7 DAY 2 16 25 16 13 23 4 8 3 1 1 25 MEAN QFF PRESSURE IN HPA 1022.6 1017.8 1017.6 1009.2 1004.2 998.5 996.9 999.5 1005.6 1016.0 1021.8 1023.2 1011.1 MAX. QFF PRESSURE IN HPA 1030.4 1029.8 1026.0 1016.2 1009.5 1004.9 1001.0 1002.8 1012.7 1024.7 1029.9 1032.4 1032.4 DAY 31 1 21 3 18 1 15 31 26 19 22 28 MIN. QFF PRESSURE IN HPA 1015.2 1007.7 1007.7 998.6 992.8 994.0 991.1 996.4 999.5 1010.5 1012.1 1012.6 991.1 DAY 25 16 25 16 13 27 4 11 3 3 1 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.4 8.1 12.3 21.1 26.6 31.9 33.5 29.7 25.4 18.4 13.1 9.5 19.8 MINIMUN AIR TEMPERATURE (C) 1.0 2.0 6.8 12.7 17.5 22.1 24.8 21.9 17.3 10.3 5.8 4.5 12.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 21 30 20 4 0 0 0 79 DAYS WITH MINIMUM TEMP. <=-4 2 3 0 0 0 0 0 0 0 0 0 0 5 DAYS WITH FREEZING MIN.<= 0 17 8 0 0 0 0 0 0 0 0 1 10 36 TEMPERATURE RECORDS LOWEST(C) -4.0 -5.4 1.2 6.6 12.2 16.2 21.2 14.2 8.4 3.6 -1.6 -2.4 -5.4 DAY 1 15 18 15 7 25 8 11 29 15 29 21 MAXIMUM AIR TEMPERATURE (C) 11.9 12.3 16.2 26.0 31.5 37.0 38.3 37.8 33.8 26.9 21.4 15.6 25.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 19 30 31 31 24 1 0 0 143 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.6 17.6 22.0 34.4 40.0 41.8 42.8 41.8 40.8 30.2 28.0 23.6 42.8 DAY 25 4 27 25 31 8 10 8 9 5 2 13 DIF. BETWEEN (MAX.-MIN.) (C) 10.9 10.3 9.4 13.3 14.0 14.9 13.5 15.9 16.5 16.6 15.6 11.1 13.5 MEAN DAILY TEMP. (MDT) (C) 6.5 7.1 11.5 19.3 24.5 29.5 31.6 29.8 25.5 18.6 13.6 10.1 19.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 21.7 112.8 256.1 316.9 273.6 152.5 2.1 0.0 0.0 1135.8 HEATING DEG. DAYS(BASE 18 0C) 357.8 304.6 201.5 25.8 0.0 0.0 0.0 0.0 5.6 14.8 125.6 246.0 1281.7 DEWPOINT (MEAN C) 0.8 -1.2 5.3 6.4 7.3 5.5 4.1 2.0 3.2 -0.3 -0.8 1.2 2.8 MIXING RATIO (G/KG) 4.85 4.23 6.64 7.12 7.53 6.80 6.02 5.34 5.60 4.44 4.24 4.95 5.65 VAPOUR PRESSURE (HPA) 6.83 5.95 9.29 9.95 10.49 9.46 8.37 7.42 7.84 6.26 6.00 6.98 7.90 SATURATION DEF. (HPA) 3.91 5.35 5.53 16.35 25.91 39.71 44.66 36.43 27.01 16.14 10.09 5.90 19.75 RELATIVE HUMIDITY (MEAN %) 66 57 66 42 32 21 17 18 25 29 42 59 40 RELATIVE HUMIDITY (MAX. %) 90 83 87 68 51 32 27 27 34 37 58 78 56 RELATIVE HUMIDITY (MIN. %) 48 39 50 28 22 14 11 12 18 22 28 42 28 RELATIVE HUMIDITY (MEAN% 03UTC) 89 80 85 63 51 32 26 24 31 35 54 72 54 RELATIVE HUMIDITY (MEAN% 09UTC) 58 48 58 35 25 17 14 14 20 24 32 49 33 RELATIVE HUMIDITY (MEAN% 15UTC) 63 51 63 37 27 17 14 17 22 26 35 51 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 64.7 64.0 125.6 17.8 21.1 0.0 0.0 0.0 0.0 0.0 2.3 11.4 306.9 DAYS WITH PRECIPITATION >=10 1 1 5 1 1 0 0 0 0 0 0 0 9 DAYS WITH PRECIPITATION >= 5 3 5 10 1 2 0 0 0 0 0 0 1 22 DAYS WITH PRECIPITATION >= 1 7 7 16 2 4 0 0 0 0 0 1 3 40 DAYS WITH PRECIPITATION 10 10 20 5 6 0 0 0 0 0 3 7 61 GREATEST DAILY PRECIPITATION 35.0 32.0 25.0 15.0 10.0 0.0 0.0 0.0 0.0 0.0 1.0 5.0 35.0 DAY 26 23 3 1 5