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 ** ** ** ** ** 8 23 DAY WITH THUNDER STORM 2 1 5 2 4 0 0 0 0 0 2 0 16 DAYS WITH SNOW OR SLEET 2 1 0 0 0 0 0 0 0 0 0 3 6 DAYS WITH DUST 1 0 1 6 7 6 4 2 2 2 0 5 36 WIND DIRECTION (PREVAILING) 135 135 135 135 135 360 360 360 360 135 135 270 135 PREVAILING WIND SPEED(KNOTS) 6.9 7.2 7.0 8.5 8.2 18.1 18.4 16.4 17.7 7.1 5.9 7.1 7.7 PREVAILING WIND PERCENT 16.8 23.6 23.2 25.5 20.6 20.0 43.2 29.7 17.5 8.1 11.3 12.9 12.9 CALMS PERCENT OF WIND 60.0 43.6 38.7 26.8 22.6 21.3 12.3 31.0 45.0 64.9 72.9 59.3 44.3 NO. OF WIND OBSERVATION 155 140 155 149 155 150 155 229 240 248 240 248 2264 VECTOR WIND DIRECTION (MEAN) 173 162 120 152 115 46 23 17 21 46 159 223 41 VECTOR WIND MAGNITUDE(KNOTS) 1.4 1.1 1.6 1.2 1.4 5.7 10.5 6.7 4.0 0.8 0.7 1.1 2.0 WIND STEADINESES (MEAN %) 48.3 26.8 36.4 18.5 18.9 58.2 78.9 76.1 58.8 28.6 41.2 36.7 33.9 WIND SPEED (MEAN KNOTS) 2.9 4.1 4.4 6.5 7.4 9.8 13.3 8.8 6.8 2.8 1.7 3.0 5.9 FASTEST WIND DIRECTION 300 300 280 360 260 360 10 360 360 360 300 290 10 FASTEST WIND SPEED (KNOTS) 17 23 17 27 23 29 43 27 33 23 17 27 43 DAY 15 5 2 20 23 18 21 16 10 13 12 26 DAYS WITH SKY CLEAR (0-2)/8 14 9 6 11 17 30 31 31 29 30 21 9 238 DAYS WITH P.CLOUDY (3-6)/8 11 15 11 16 11 0 0 0 1 1 7 10 83 DAYS WITH CLOUDY (7-8)/8 6 4 14 3 3 0 0 0 0 0 2 12 44 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 1 0 3 0 1 0 0 0 6 DURATION OF SUNSHINE HOURS 187.8 194.3 164.5 266.4 291.3 354.0 365.5 360.7 312.9 292.3 243.5 155.3 3188.5 ======================================================================================================================= 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 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 884.3 883.7 881.2 880.7 876.9 875.4 873.0 874.5 879.8 884.3 886.0 883.8 880.3 MAX. QFE PRESSURE IN HPA 892.6 895.2 887.9 887.7 882.8 880.6 878.1 878.7 886.7 888.2 891.7 890.5 895.2 DAY-HOUR 13- 6 15- 6 5- 6 16- 6 9- 6 17- 3 1- 3 31-18 29- 6 20- 6 14- 6 7- 6 MIN. QFE PRESSURE IN HPA 873.0 877.0 870.5 873.3 867.3 869.8 868.7 871.5 874.2 879.9 879.4 876.1 867.3 DAY-HOUR 26-12 8-12 7-12 11-12 23-12 12-12 14-12 14-12 3-12 5-12 5-12 26- 3 MEAN QNH PRESSURE IN HPA 1022.3 1021.7 1018.8 1018.3 1014.1 1012.3 1009.6 1011.3 1017.3 1022.4 1024.3 1021.8 1017.9 MAX. QNH PRESSURE IN HPA 1031.7 1034.6 1026.4 1026.2 1020.6 1018.2 1015.4 1016.0 1025.0 1026.7 1030.7 1029.3 1034.6 DAY-HOUR 13- 6 15- 6 5- 6 16- 6 9- 6 17- 3 1- 3 31-18 29- 6 20- 6 14- 6 7- 6 MIN. QNH PRESSURE IN HPA 1009.6 1014.1 1006.8 1010.0 1003.2 1006.0 1004.8 1007.9 1011.0 1017.4 1016.8 1013.1 1003.2 DAY-HOUR 26-12 8-12 7-12 11-12 23-12 12-12 14-12 14-12 3-12 5-12 5-12 26- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1000.5 1008.1 1016.7 1021.2 1020.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1006.1 1021.1 1022.6 1029.7 1030.5 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 31- 3 29- 6 16- 3 29- 6 18- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 994.3 998.5 1009.6 1011.5 1012.3 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 14-15 8-12 5-12 5-12 16-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 874.5 879.5 884.1 885.8 883.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 876.8 884.9 886.3 889.4 889.0 ****** DAY ** ** ** ** ** ** ** 31 29 17 14 9 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 872.2 875.0 880.6 880.3 876.9 ****** DAY ** ** ** ** ** ** ** 25 8 5 6 26 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.3 1016.9 1022.2 1024.0 1021.4 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1013.9 1023.0 1024.6 1028.1 1027.6 ****** DAY ** ** ** ** ** ** ** 31 29 17 14 9 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.7 1011.9 1018.2 1017.8 1014.0 ****** DAY ** ** ** ** ** ** ** 25 8 5 6 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1000.3 1007.6 1016.4 1020.7 1019.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.9 1018.6 1020.2 1026.0 1026.4 ****** DAY ** ** ** ** ** ** ** 31 29 16 29 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.0 999.5 1011.3 1012.4 1013.1 ****** DAY ** ** ** ** ** ** ** 16 8 5 6 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 884.7 884.0 881.6 881.3 877.9 876.5 873.9 875.1 880.6 885.0 886.6 884.0 880.9 MAX. QFE PRESSURE IN HPA 891.2 893.5 886.7 886.7 882.7 880.6 878.1 878.2 885.6 887.3 890.8 889.4 893.5 DAY 13 15 5 16 9 17 1 31 29 20 14 7 MIN. QFE PRESSURE IN HPA 874.1 877.7 873.7 875.1 871.6 872.3 871.2 872.2 875.8 881.0 881.6 876.1 871.2 DAY 26 5 7 12 23 13 14 1 8 5 6 26 MEAN QNH PRESSURE IN HPA 1022.8 1022.0 1019.2 1018.9 1015.1 1013.6 1010.7 1012.0 1018.2 1023.1 1024.9 1022.0 1018.5 MAX. QNH PRESSURE IN HPA 1030.1 1032.7 1025.0 1025.0 1020.5 1018.2 1015.4 1015.5 1023.8 1025.7 1029.6 1028.1 1032.7 DAY 13 15 5 16 9 17 1 31 29 20 14 7 MIN. QNH PRESSURE IN HPA 1010.9 1014.9 1010.4 1012.0 1008.0 1008.8 1007.6 1008.7 1012.8 1018.6 1019.3 1013.1 1007.6 DAY 26 5 7 12 23 13 14 1 8 5 6 26 MEAN QFF PRESSURE IN HPA 1023.9 1022.7 1017.4 1013.2 1006.7 1002.9 999.0 1001.5 1009.9 1018.6 1022.9 1021.2 1013.3 MAX. QFF PRESSURE IN HPA 1033.6 1037.9 1025.4 1022.0 1013.4 1008.1 1004.0 1006.1 1020.7 1022.6 1028.6 1029.3 1037.9 DAY 13 15 5 16 9 24 1 31 29 16 29 18 MIN. QFF PRESSURE IN HPA 1007.6 1012.4 1008.8 1005.2 997.5 997.4 995.5 997.2 1000.9 1012.6 1015.7 1013.9 995.5 DAY 26 5 7 12 23 6 29 1 8 5 6 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 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 885.9 885.2 882.6 882.2 878.4 876.7 874.2 875.6 881.3 886.0 887.7 885.4 881.8 MAX. QFE PRESSURE IN HPA 892.6 895.2 887.9 887.7 882.8 880.5 877.8 878.3 886.7 888.2 891.7 890.5 895.2 DAY 13 15 5 16 9 22 1 31 29 20 14 7 MIN. QFE PRESSURE IN HPA 875.2 879.2 873.7 876.5 871.9 872.9 871.4 873.5 876.8 882.4 882.4 878.4 871.4 DAY 26 8 7 12 23 13 14 25 8 5 6 26 MEAN QNH PRESSURE IN HPA 1024.1 1023.4 1020.4 1020.0 1015.7 1013.7 1011.0 1012.6 1018.9 1024.2 1026.2 1023.6 1019.5 MAX. QNH PRESSURE IN HPA 1031.7 1034.6 1026.4 1026.2 1020.6 1018.1 1015.0 1015.6 1025.0 1026.7 1030.7 1029.3 1034.6 DAY 13 15 5 16 9 22 1 31 29 20 14 7 MIN. QNH PRESSURE IN HPA 1012.1 1016.6 1010.4 1013.6 1008.4 1009.5 1007.8 1010.2 1013.9 1020.2 1020.2 1015.7 1007.8 DAY 26 8 7 12 23 13 14 25 8 5 6 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1001.9 1009.5 1018.4 1023.1 1022.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.8 1021.1 1021.8 1029.7 1030.5 ****** DAY ** ** ** ** ** ** ** 31 29 16 29 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.0 1002.1 1012.9 1014.4 1016.2 ****** DAY ** ** ** ** ** ** ** 8 8 5 6 26 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 884.0 883.7 881.3 880.9 877.2 875.6 873.2 874.6 879.8 884.1 885.7 883.5 880.3 MAX. QFE PRESSURE IN HPA 890.3 894.6 886.6 886.1 881.2 879.6 876.5 877.1 885.3 886.7 889.5 888.9 894.6 DAY 13 15 5 15 9 22 1 31 29 16 13 7 MIN. QFE PRESSURE IN HPA 874.1 877.5 872.6 874.5 870.5 871.8 870.0 872.7 875.4 880.6 880.6 877.9 870.0 DAY 26 8 7 12 23 12 14 25 3 5 6 26 MEAN QNH PRESSURE IN HPA 1022.0 1021.6 1019.0 1018.5 1014.3 1012.5 1009.9 1011.4 1017.3 1022.1 1023.9 1021.5 1017.8 MAX. QNH PRESSURE IN HPA 1029.1 1033.9 1024.9 1024.4 1018.8 1017.0 1013.6 1014.2 1023.5 1025.0 1028.2 1027.5 1033.9 DAY 13 15 5 15 9 22 1 31 29 16 13 7 MIN. QNH PRESSURE IN HPA 1010.9 1014.7 1009.2 1011.3 1006.8 1008.3 1006.2 1009.3 1012.3 1018.2 1018.2 1015.1 1006.2 DAY 26 8 7 12 23 12 14 25 3 5 6 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1000.4 1007.6 1015.6 1020.1 1019.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.9 1019.0 1020.2 1026.5 1026.4 ****** DAY ** ** ** ** ** ** ** 30 29 16 29 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.6 1001.3 1010.1 1012.5 1013.3 ****** DAY ** ** ** ** ** ** ** 16 8 5 5 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 883.1 882.5 880.0 879.4 875.4 874.1 871.8 873.2 878.4 882.8 884.7 882.5 879.0 MAX. QFE PRESSURE IN HPA 889.1 893.4 886.2 884.4 880.1 878.9 874.7 875.8 883.3 885.3 888.8 888.3 893.4 DAY 13 15 29 15 8 22 1 31 30 21 13 7 MIN. QFE PRESSURE IN HPA 873.0 877.0 870.5 873.3 867.3 869.8 868.7 871.5 874.2 879.9 879.4 878.3 867.3 DAY 26 8 7 11 23 12 14 14 3 5 5 26 MEAN QNH PRESSURE IN HPA 1020.9 1020.3 1017.5 1016.8 1012.4 1010.8 1008.3 1009.8 1015.7 1020.6 1022.7 1020.3 1016.3 MAX. QNH PRESSURE IN HPA 1027.7 1032.6 1024.5 1022.4 1017.6 1016.3 1011.5 1012.8 1021.2 1023.5 1027.4 1026.8 1032.6 DAY 13 15 29 15 8 22 1 31 30 21 13 7 MIN. QNH PRESSURE IN HPA 1009.6 1014.1 1006.8 1010.0 1003.2 1006.0 1004.8 1007.9 1011.0 1017.4 1016.8 1015.6 1003.2 DAY 26 8 7 11 23 12 14 14 3 5 5 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.0 1006.2 1014.6 1019.4 1018.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1002.9 1016.3 1019.0 1024.9 1024.2 ****** DAY ** ** ** ** ** ** ** 30 29 16 13 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 995.7 998.5 1009.6 1011.5 1012.3 ****** DAY ** ** ** ** ** ** ** 14 8 5 5 16 ======================================================================================================================= 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 PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 884.0 883.3 880.7 879.8 875.9 874.3 871.9 873.3 878.7 883.5 885.6 883.7 879.6 MAX. QFE PRESSURE IN HPA 890.2 893.7 885.7 884.6 880.1 878.3 875.0 876.9 884.3 886.6 890.0 888.9 893.7 DAY 12 15 29 15 8 16 2 31 28 16 13 7 MIN. QFE PRESSURE IN HPA 874.8 878.0 872.1 873.4 871.2 870.3 868.9 871.6 874.4 880.5 880.1 880.1 868.9 DAY 26 4 7 11 22 12 14 15 3 4 5 22 MEAN QNH PRESSURE IN HPA 1022.0 1021.2 1018.3 1017.2 1012.9 1011.1 1008.4 1010.0 1016.1 1021.4 1023.8 1021.6 1017.0 MAX. QNH PRESSURE IN HPA 1029.0 1032.9 1023.9 1022.7 1017.6 1015.6 1011.9 1014.0 1022.3 1024.9 1028.7 1027.5 1032.9 DAY 12 15 29 15 8 16 2 31 28 16 13 7 MIN. QNH PRESSURE IN HPA 1011.6 1015.2 1008.6 1010.1 1007.6 1006.6 1005.0 1008.0 1011.2 1018.1 1017.6 1017.6 1005.0 DAY 26 4 7 11 22 12 14 15 3 4 5 22 MEAN QFF PRESSURE IN HPA 1023.1 1021.9 1016.3 1011.4 1004.3 1000.4 996.7 999.3 1007.7 1016.7 1021.8 1020.9 1011.7 MAX. QFF PRESSURE IN HPA 1032.3 1037.6 1024.0 1019.6 1011.3 1005.7 1000.4 1004.6 1019.0 1022.1 1027.7 1026.4 1037.6 DAY 13 15 12 15 8 22 1 31 28 16 29 18 MIN. QFF PRESSURE IN HPA 1008.4 1014.0 1007.2 1003.0 996.4 994.3 994.0 994.3 999.5 1011.2 1013.9 1014.6 994.0 DAY 25 4 7 11 18 8 14 14 8 5 5 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 875.1 880.3 884.8 886.4 884.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 878.7 885.5 887.3 890.5 889.1 ****** DAY ** ** ** ** ** ** ** 31 28 27 13 7 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 873.1 876.0 881.5 881.2 879.5 ****** DAY ** ** ** ** ** ** ** 15 3 4 5 22 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1012.0 1017.8 1022.9 1024.7 1022.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1016.0 1023.7 1025.7 1029.3 1027.7 ****** DAY ** ** ** ** ** ** ** 31 28 27 13 7 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1009.7 1013.0 1019.2 1018.8 1016.9 ****** DAY ** ** ** ** ** ** ** 15 3 4 5 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1001.1 1008.5 1017.1 1021.7 1021.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1005.3 1019.5 1019.8 1027.9 1027.1 ****** DAY ** ** ** ** ** ** ** 31 28 15 29 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.7 1001.1 1012.2 1013.6 1014.7 ****** DAY ** ** ** ** ** ** ** 15 8 4 6 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 875.0 880.1 884.4 886.0 883.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 878.1 885.6 886.7 890.2 889.1 ****** DAY ** ** ** ** ** ** ** 31 28 19 13 8 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 872.9 876.1 881.2 880.5 878.2 ****** DAY ** ** ** ** ** ** ** 24 3 4 8 25 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.9 1017.6 1022.5 1024.2 1021.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1015.4 1023.8 1025.0 1029.0 1027.7 ****** DAY ** ** ** ** ** ** ** 31 28 19 13 8 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1009.5 1013.1 1018.8 1018.1 1015.5 ****** DAY ** ** ** ** ** ** ** 24 3 4 8 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1000.7 1008.1 1016.1 1020.5 1020.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.6 1019.1 1019.5 1026.1 1026.8 ****** DAY ** ** ** ** ** ** ** 30 28 16 13 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.3 1001.1 1011.7 1012.5 1014.3 ****** DAY ** ** ** ** ** ** ** 15 9 4 5 15 ======================================================================================================================= 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 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.1 8.7 10.4 18.1 ***** 30.4 31.6 28.7 24.5 21.1 13.9 9.4 ***** MINIMUN AIR TEMPERATURE (C) 1.4 2.8 4.3 12.2 ***** 22.5 25.7 22.2 16.1 10.0 5.6 5.1 ***** DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 **** 20 31 20 0 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 4 1 1 0 **** 0 0 0 0 0 0 0 **** DAYS WITH FREEZING MIN.<= 0 14 8 4 0 **** 0 0 0 0 0 0 0 **** TEMPERATURE RECORDS LOWEST(C) -5.8 -5.0 -4.4 5.8 ***** 17.4 21.8 17.8 11.0 3.0 0.6 0.3 ***** DAY 7 17 13 6 ** 1 10 29 14 18 23 12 MAXIMUM AIR TEMPERATURE (C) 9.9 15.5 16.8 24.1 ***** 37.4 37.9 35.9 32.1 27.5 22.5 14.6 ***** DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 **** 30 31 31 22 5 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 **** 0 0 0 0 0 0 0 **** TEMPERATURE RECORDS HIGHEST(C) 17.6 22.6 24.0 31.0 ***** 41.2 40.8 40.2 36.6 32.6 27.4 20.6 ***** DAY 3 24 30 25 ** 19 7 2 26 4 14 1 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 12.7 12.5 11.9 ***** 14.9 12.2 13.7 16.0 17.5 16.9 9.5 ***** MEAN DAILY TEMP. (MDT) (C) 5.6 9.2 10.5 18.2 ***** 30.0 31.8 29.0 24.1 18.7 14.1 9.9 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 15.9 ****** 269.1 334.5 248.4 91.9 2.3 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 383.2 256.0 231.8 50.2 ****** 0.0 0.0 0.0 0.0 21.0 118.3 251.6 ****** DEWPOINT (MEAN C) -0.6 -3.2 -2.9 3.8 ***** 5.0 3.5 1.5 -3.2 -3.4 -6.6 2.2 ***** MIXING RATIO (G/KG) 4.41 3.66 3.81 5.86 ****** 6.34 5.73 4.98 3.55 3.54 2.76 5.36 ****** VAPOUR PRESSURE (HPA) 6.22 5.14 5.36 8.21 ****** 8.83 7.97 6.95 4.99 4.99 3.91 7.55 ****** SATURATION DEF. (HPA) 3.01 6.82 7.93 13.84 ****** 36.17 39.71 33.85 27.40 21.66 13.22 4.64 ****** RELATIVE HUMIDITY (MEAN %) 70 46 44 44 *** 21 17 18 16 20 25 65 *** RELATIVE HUMIDITY (MAX. %) 90 68 65 68 *** 28 22 23 21 28 32 85 *** RELATIVE HUMIDITY (MIN. %) 48 29 28 27 *** 16 13 14 12 15 19 46 *** RELATIVE HUMIDITY (MEAN% 03UTC) 85 67 62 65 *** 28 20 22 21 26 31 78 *** RELATIVE HUMIDITY (MEAN% 09UTC) 55 34 35 32 *** 17 15 15 14 18 21 52 *** RELATIVE HUMIDITY (MEAN% 15UTC) 61 33 34 32 *** 18 16 15 14 18 21 59 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 54.0 3.1 19.8 34.3 ****** 0.0 0.0 0.0 0.0 0.0 0.0 79.3 ****** DAYS WITH PRECIPITATION >=10 2 0 1 1 **** 0 0 0 0 0 0 3 **** DAYS WITH PRECIPITATION >= 5 5 0 2 1 **** 0 0 0 0 0 0 7 **** DAYS WITH PRECIPITATION >= 1 8 2 4 3 **** 0 0 0 0 0 0 8 **** DAYS WITH PRECIPITATION 12 3 7 9 **** 0 0 0 0 0 0 13 **** GREATEST DAILY PRECIPITATION 15.0 2.0 11.0 27.0 ****** 0.0 0.0 0.0 0.0 0.0 0.0 29.2 ****** DAY 5 11 22 8 ** ** ** ** ** ** ** 22 DAY WITH THUNDER STORM 3 2 1 4 **** 2 0 0 0 1 0 0 **** DAYS WITH SNOW OR SLEET 3 0 0 0 **** 0 0 0 0 0 0 0 **** DAYS WITH DUST 3 8 6 5 **** 0 1 2 2 3 2 1 **** WIND DIRECTION (PREVAILING) 225 135 135 270 *** 45 360 360 360 135 135 135 *** PREVAILING WIND SPEED(KNOTS) 9.2 6.9 8.4 10.0 **** 11.3 16.8 16.0 14.9 8.7 6.3 5.1 **** PREVAILING WIND PERCENT 8.5 12.9 15.7 12.5 ***** 21.3 59.3 36.7 27.1 15.5 10.0 9.5 ***** CALMS PERCENT OF WIND 62.1 53.9 51.2 47.5 ***** 38.8 12.5 28.2 43.0 58.1 70.3 69.5 ***** NO. OF WIND OBSERVATION 248 232 248 240 **** 240 248 248 207 155 209 243 2518 VECTOR WIND DIRECTION (MEAN) 205 240 189 253 *** 49 10 16 19 154 172 146 *** VECTOR WIND MAGNITUDE(KNOTS) 0.7 1.5 1.1 0.9 **** 3.5 12.3 7.6 4.6 1.4 0.5 0.4 **** WIND STEADINESES (MEAN %) 24.1 36.6 26.8 19.1 ***** 57.4 92.5 78.4 68.7 40.0 26.3 22.2 ***** WIND SPEED (MEAN KNOTS) 2.9 4.1 4.1 4.7 **** 6.1 13.3 9.7 6.7 3.5 1.9 1.8 **** FASTEST WIND DIRECTION 210 310 280 300 *** 330 10 360 350 160 30 290 *** FASTEST WIND SPEED (KNOTS) 23 21 21 29 *** 23 31 27 27 21 16 16 *** DAY 3 6 25 26 ** 4 1 16 9 7 17 10 DAYS WITH SKY CLEAR (0-2)/8 12 21 13 9 **** 20 31 30 30 27 17 8 **** DAYS WITH P.CLOUDY (3-6)/8 9 4 10 17 **** 10 0 1 0 4 10 14 **** DAYS WITH CLOUDY (7-8)/8 10 4 8 4 **** 0 0 0 0 0 3 9 **** DAYS WITH VISIBILITY =< 2 KM 4 2 2 1 **** 0 0 0 0 0 0 4 **** DURATION OF SUNSHINE HOURS 151.8 222.7 200.4 238.0 ****** 313.6 374.5 354.4 319.6 299.6 241.4 164.8 ****** ======================================================================================================================= 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 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 883.8 880.6 881.2 879.5 ****** 875.4 873.3 875.9 879.9 883.4 885.8 884.8 ****** MAX. QFE PRESSURE IN HPA 893.6 887.5 892.3 886.1 ****** 881.4 878.2 880.7 885.1 889.0 891.5 891.3 ****** DAY-HOUR 10- 6 13- 6 13- 6 12- 6 **-** 2- 6 6- 3 31-21 2- 6 30- 6 4- 6 12- 6 MIN. QFE PRESSURE IN HPA 875.7 870.0 871.3 870.6 ****** 867.6 868.6 870.4 874.9 878.4 876.5 878.4 ****** DAY-HOUR 23-12 11-15 24-15 18-12 **-** 27-15 24-12 1-15 8-12 6-12 26-12 4-15 MEAN QNH PRESSURE IN HPA 1021.7 1018.2 1018.9 1016.9 ****** 1012.3 1009.9 1012.8 1017.4 1021.3 1024.0 1022.9 ****** MAX. QNH PRESSURE IN HPA 1032.8 1025.9 1031.3 1024.4 ****** 1019.1 1015.5 1018.3 1023.2 1027.6 1030.4 1030.2 ****** DAY-HOUR 10- 6 13- 6 13- 6 12- 6 **-** 2- 6 6- 3 31-21 2- 6 30- 6 4- 6 12- 6 MIN. QNH PRESSURE IN HPA 1012.7 1006.2 1007.7 1006.9 ****** 1003.5 1004.7 1006.7 1011.8 1015.7 1013.6 1015.7 ****** DAY-HOUR 23-12 11-15 24-15 18-12 **-** 27-15 24-12 1-15 8-12 6-12 26-12 4-15 MEAN QFF PRESSURE IN HPA 1022.8 1017.3 1017.2 1011.1 ****** 1000.7 997.9 1002.1 1009.2 ****** 1021.0 1021.6 ****** MAX. QFF PRESSURE IN HPA 1037.0 1027.8 1033.7 1020.5 ****** 1008.1 1003.4 1009.6 1016.1 ****** 1028.2 1031.1 ****** DAY-HOUR 10- 6 13- 6 13- 3 12- 6 **-** 2- 3 6- 3 31-21 2- 3 **-** 29- 6 12- 6 MIN. QFF PRESSURE IN HPA 1011.1 1002.9 1004.2 999.4 ****** 991.3 992.2 994.7 1002.7 ****** 1009.9 1013.6 ****** DAY-HOUR 23-12 11-15 31-12 18-18 **-** 27-12 24-12 2-12 8-12 **-** 26-12 19-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 883.4 880.2 880.8 879.1 ****** 875.2 873.1 875.5 879.0 ****** 885.0 884.5 ****** MAX. QFE PRESSURE IN HPA 891.3 885.7 889.9 883.9 ****** 879.6 877.0 878.5 882.5 ****** 888.1 889.3 ****** DAY 10 14 13 13 ** 2 6 15 21 ** 24 12 MIN. QFE PRESSURE IN HPA 876.8 873.6 872.9 872.4 ****** 868.3 869.6 871.6 876.2 ****** 879.3 879.7 ****** DAY 24 12 25 19 ** 27 26 2 9 ** 27 5 MEAN QNH PRESSURE IN HPA 1021.3 1017.8 1018.4 1016.4 ****** 1012.0 1009.7 1012.4 1016.4 ****** 1023.1 1022.5 ****** MAX. QNH PRESSURE IN HPA 1030.2 1023.9 1028.6 1021.9 ****** 1017.0 1014.1 1015.8 1020.3 ****** 1026.6 1028.0 ****** DAY 10 14 13 13 ** 2 6 15 21 ** 24 12 MIN. QNH PRESSURE IN HPA 1013.9 1010.3 1009.5 1008.9 ****** 1004.3 1005.8 1008.0 1013.2 ****** 1016.7 1017.2 ****** DAY 24 12 25 19 ** 27 26 2 9 ** 27 5 MEAN QFF PRESSURE IN HPA 1022.0 1016.6 1016.4 1010.6 ****** 1000.5 997.6 1001.5 1008.1 ****** 1020.0 1020.9 ****** MAX. QFF PRESSURE IN HPA 1033.8 1026.4 1030.7 1017.4 ****** 1006.5 1001.9 1006.4 1011.4 ****** 1024.7 1028.9 ****** DAY 11 17 13 12 ** 2 6 15 21 ** 24 12 MIN. QFF PRESSURE IN HPA 1012.9 1008.4 1006.1 1001.3 ****** 992.1 994.1 996.5 1004.5 ****** 1011.5 1014.3 ****** DAY 24 12 31 19 ** 28 26 2 9 ** 27 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 883.8 881.0 881.5 880.1 ****** 876.4 873.9 876.6 880.7 884.1 886.5 885.1 ****** MAX. QFE PRESSURE IN HPA 891.5 886.7 891.2 885.1 ****** 880.9 878.2 879.7 884.7 888.2 890.6 889.6 ****** DAY 10 23 13 26 ** 2 6 31 2 30 4 12 MIN. QFE PRESSURE IN HPA 878.3 876.6 874.2 872.5 ****** 869.7 870.4 872.5 876.8 881.1 879.8 881.3 ****** DAY 24 12 24 19 ** 27 26 2 9 6 26 20 MEAN QNH PRESSURE IN HPA 1021.8 1018.6 1019.2 1017.6 ****** 1013.4 1010.7 1013.6 1018.3 1022.1 1024.8 1023.2 ****** MAX. QNH PRESSURE IN HPA 1030.4 1025.0 1030.1 1023.2 ****** 1018.5 1015.5 1017.2 1022.8 1026.7 1029.4 1028.3 ****** DAY 10 23 13 26 ** 2 6 31 2 30 4 12 MIN. QNH PRESSURE IN HPA 1015.6 1013.7 1011.0 1009.1 ****** 1005.9 1006.7 1009.1 1013.9 1018.7 1017.3 1019.0 ****** DAY 24 12 24 19 ** 27 26 2 9 6 26 20 MEAN QFF PRESSURE IN HPA 1023.3 1018.4 1018.3 1012.4 ****** 1002.4 998.8 1003.5 1010.8 1017.6 1022.9 1022.5 ****** MAX. QFF PRESSURE IN HPA 1034.7 1027.6 1033.7 1020.1 ****** 1008.1 1003.4 1008.3 1016.1 1022.4 1027.7 1030.0 ****** DAY 10 17 13 12 ** 2 6 31 2 30 24 12 MIN. QFF PRESSURE IN HPA 1015.3 1010.9 1007.0 1001.8 ****** 994.3 995.0 997.7 1005.8 1013.2 1016.2 1016.2 ****** DAY 22 26 31 19 ** 27 26 2 9 7 16 20 ======================================================================================================================= 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 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 885.3 882.2 882.9 880.8 ****** 876.9 874.3 877.1 881.4 885.1 887.6 886.5 ****** MAX. QFE PRESSURE IN HPA 893.6 887.5 892.3 886.1 ****** 881.4 878.0 880.4 885.1 889.0 891.5 891.3 ****** DAY 10 13 13 12 ** 2 6 31 2 30 4 12 MIN. QFE PRESSURE IN HPA 879.8 877.2 875.4 872.5 ****** 869.5 871.2 873.0 877.8 881.8 880.1 882.7 ****** DAY 23 11 24 19 ** 27 19 2 6 6 26 4 MEAN QNH PRESSURE IN HPA 1023.5 1020.0 1020.7 1018.4 ****** 1014.0 1011.1 1014.2 1019.1 1023.2 1026.0 1024.8 ****** MAX. QNH PRESSURE IN HPA 1032.8 1025.9 1031.3 1024.4 ****** 1019.1 1015.2 1017.9 1023.2 1027.6 1030.4 1030.2 ****** DAY 10 13 13 12 ** 2 6 31 2 30 4 12 MIN. QNH PRESSURE IN HPA 1017.3 1014.3 1012.3 1009.1 ****** 1005.7 1007.6 1009.6 1015.0 1019.5 1017.6 1020.5 ****** DAY 23 11 24 19 ** 27 19 2 6 6 26 4 MEAN QFF PRESSURE IN HPA 1024.7 1019.2 1019.1 1012.6 ****** 1002.1 999.1 1003.6 1010.3 ****** 1022.6 1023.6 ****** MAX. QFF PRESSURE IN HPA 1037.0 1027.8 1033.5 1020.5 ****** 1008.1 1002.9 1008.9 1015.9 ****** 1028.2 1031.1 ****** DAY 10 13 13 12 ** 2 16 31 2 ** 29 12 MIN. QFF PRESSURE IN HPA 1016.6 1011.0 1007.5 1001.0 ****** 992.8 995.7 997.5 1006.6 ****** 1014.8 1018.8 ****** DAY 22 26 31 19 ** 27 19 2 6 ** 26 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 883.5 880.7 881.7 879.6 ****** 875.8 873.5 876.1 880.1 883.3 885.7 884.6 ****** MAX. QFE PRESSURE IN HPA 892.6 886.2 890.4 885.2 ****** 880.2 877.1 879.2 883.3 887.0 889.8 889.8 ****** DAY 10 13 13 12 ** 2 6 31 2 29 4 12 MIN. QFE PRESSURE IN HPA 877.1 873.8 874.5 870.9 ****** 869.0 870.6 872.3 876.5 880.1 878.0 880.3 ****** DAY 23 11 10 19 ** 27 26 2 8 6 26 4 MEAN QNH PRESSURE IN HPA 1021.5 1018.3 1019.4 1017.1 ****** 1012.8 1010.2 1013.1 1017.6 1021.2 1023.9 1022.7 ****** MAX. QNH PRESSURE IN HPA 1031.7 1024.5 1029.2 1023.3 ****** 1017.7 1014.2 1016.6 1021.2 1025.4 1028.5 1028.5 ****** DAY 10 13 13 12 ** 2 6 31 2 29 4 12 MIN. QNH PRESSURE IN HPA 1014.2 1010.5 1011.3 1007.3 ****** 1005.1 1006.9 1008.8 1013.6 1017.6 1015.2 1017.8 ****** DAY 23 11 10 19 ** 27 26 2 8 6 26 4 MEAN QFF PRESSURE IN HPA 1022.1 1017.0 1017.4 1011.0 ****** 1000.8 997.9 1002.1 1009.5 ****** 1019.6 1020.9 ****** MAX. QFF PRESSURE IN HPA 1034.5 1026.0 1031.0 1019.1 ****** 1006.9 1001.9 1006.7 1013.3 ****** 1024.4 1028.5 ****** DAY 10 13 13 12 ** 2 16 31 2 ** 29 12 MIN. QFF PRESSURE IN HPA 1013.0 1006.5 1005.9 999.8 ****** 992.3 994.3 996.7 1006.6 ****** 1011.9 1015.0 ****** DAY 23 11 31 19 ** 27 23 2 12 ** 26 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 882.5 879.3 879.9 877.9 ****** 874.1 872.2 874.6 878.5 882.0 884.6 883.6 ****** MAX. QFE PRESSURE IN HPA 891.3 885.2 888.2 883.4 ****** 878.1 875.9 878.5 881.4 886.3 887.9 888.5 ****** DAY 10 13 13 12 ** 2 5 31 2 29 4 12 MIN. QFE PRESSURE IN HPA 875.7 870.6 872.3 870.6 ****** 867.7 868.6 870.4 874.9 878.4 876.5 878.7 ****** DAY 23 11 24 18 ** 27 24 2 8 6 26 4 MEAN QNH PRESSURE IN HPA 1020.3 1016.7 1017.4 1015.2 ****** 1010.9 1008.7 1011.4 1015.8 1019.8 1022.7 1021.6 ****** MAX. QNH PRESSURE IN HPA 1030.2 1023.3 1026.7 1021.3 ****** 1015.4 1012.9 1015.8 1019.1 1024.6 1026.4 1027.1 ****** DAY 10 13 13 12 ** 2 5 31 2 29 4 12 MIN. QNH PRESSURE IN HPA 1012.7 1006.9 1008.8 1006.9 ****** 1003.7 1004.7 1006.7 1011.8 1015.7 1013.6 1016.0 ****** DAY 23 11 24 18 ** 27 24 2 8 6 26 4 MEAN QFF PRESSURE IN HPA 1021.1 1015.4 1015.4 1009.3 ****** 999.3 996.5 1000.4 1006.5 ****** 1018.6 1019.9 ****** MAX. QFF PRESSURE IN HPA 1033.6 1025.0 1028.8 1016.9 ****** 1004.7 1000.3 1006.2 1009.6 ****** 1023.7 1027.6 ****** DAY 10 13 13 12 ** 2 2 31 15 ** 29 12 MIN. QFF PRESSURE IN HPA 1011.1 1003.8 1004.2 999.5 ****** 991.3 992.2 994.7 1002.7 ****** 1009.9 1013.6 ****** DAY 23 11 31 18 ** 27 24 2 8 ** 26 19 ======================================================================================================================= 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 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 883.6 879.9 880.3 878.4 ****** 874.1 872.1 874.6 879.0 882.7 885.6 884.5 ****** MAX. QFE PRESSURE IN HPA 891.8 885.7 888.4 883.4 ****** 878.3 875.7 877.8 881.5 887.0 889.1 889.2 ****** DAY 10 13 12 12 ** 2 5 31 2 29 4 12 MIN. QFE PRESSURE IN HPA 876.4 870.0 871.3 870.9 ****** 867.6 869.0 870.4 874.9 879.1 877.6 878.4 ****** DAY 23 11 24 18 ** 27 23 1 8 6 26 4 MEAN QNH PRESSURE IN HPA 1021.6 1017.4 1017.8 1015.7 ****** 1010.8 1008.7 1011.4 1016.4 1020.6 1023.8 1022.5 ****** MAX. QNH PRESSURE IN HPA 1030.8 1023.9 1026.9 1021.3 ****** 1015.6 1012.7 1015.0 1019.2 1025.4 1027.7 1027.8 ****** DAY 10 13 12 12 ** 2 5 31 2 29 4 12 MIN. QNH PRESSURE IN HPA 1013.4 1006.2 1007.7 1007.3 ****** 1003.5 1005.1 1006.7 1011.8 1016.5 1014.8 1015.7 ****** DAY 23 11 24 18 ** 27 23 1 8 6 26 4 MEAN QFF PRESSURE IN HPA 1023.1 1017.2 1016.7 1010.6 ****** 999.8 996.7 1001.2 1008.8 1016.0 1021.8 1021.8 ****** MAX. QFF PRESSURE IN HPA 1035.5 1026.6 1029.8 1017.3 ****** 1005.5 1000.4 1006.3 1012.3 1020.8 1026.7 1029.5 ****** DAY 10 13 13 12 ** 2 15 31 2 29 29 12 MIN. QFF PRESSURE IN HPA 1013.0 1002.9 1004.5 1000.0 ****** 991.6 992.3 995.5 1003.4 1011.0 1013.1 1014.7 ****** DAY 23 11 31 18 ** 27 23 1 8 6 26 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 884.3 881.0 881.5 880.0 ****** 875.4 873.6 876.3 880.0 ****** 885.7 885.2 ****** MAX. QFE PRESSURE IN HPA 892.6 886.9 890.6 884.4 ****** 879.5 877.7 880.4 883.0 ****** 888.8 890.1 ****** DAY 10 13 12 12 ** 2 5 31 20 ** 29 12 MIN. QFE PRESSURE IN HPA 877.1 870.7 872.8 871.1 ****** 869.1 870.5 872.4 877.4 ****** 877.9 879.1 ****** DAY 23 11 24 18 ** 27 24 1 8 ** 26 4 MEAN QNH PRESSURE IN HPA 1022.3 1018.6 1019.2 1017.5 ****** 1012.3 1010.3 1013.3 1017.5 ****** 1023.9 1023.4 ****** MAX. QNH PRESSURE IN HPA 1031.7 1025.3 1029.4 1022.4 ****** 1016.9 1014.9 1017.9 1020.9 ****** 1027.4 1028.9 ****** DAY 10 13 12 12 ** 2 5 31 20 ** 29 12 MIN. QNH PRESSURE IN HPA 1014.2 1007.0 1009.4 1007.5 ****** 1005.2 1006.8 1008.9 1014.6 ****** 1015.1 1016.5 ****** DAY 23 11 24 18 ** 27 24 1 8 ** 26 4 MEAN QFF PRESSURE IN HPA 1023.6 1017.9 1017.5 1011.7 ****** 1000.7 998.4 1002.8 1009.3 ****** 1021.4 1022.2 ****** MAX. QFF PRESSURE IN HPA 1036.2 1027.0 1031.2 1017.8 ****** 1006.3 1002.4 1009.6 1013.5 ****** 1026.7 1030.0 ****** DAY 10 13 12 12 ** 2 15 31 1 ** 29 11 MIN. QFF PRESSURE IN HPA 1014.0 1004.1 1005.7 999.4 ****** 991.9 994.9 997.0 1006.2 ****** 1011.2 1014.1 ****** DAY 23 11 24 18 ** 27 23 1 8 ** 26 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 883.8 880.8 881.2 879.8 ****** 875.2 873.6 876.3 ****** ****** 885.3 884.7 ****** MAX. QFE PRESSURE IN HPA 891.8 887.2 890.5 884.2 ****** 879.2 877.7 880.7 ****** ****** 888.0 889.5 ****** DAY 10 16 12 13 ** 11 5 31 ** ** 23 11 MIN. QFE PRESSURE IN HPA 876.4 872.2 873.3 872.1 ****** 869.1 870.5 872.3 ****** ****** 878.6 879.8 ****** DAY 23 11 24 18 ** 27 24 1 ** ** 26 9 MEAN QNH PRESSURE IN HPA 1021.8 1018.4 1018.9 1017.3 ****** 1012.1 1010.2 1013.3 ****** ****** 1023.5 1022.7 ****** MAX. QNH PRESSURE IN HPA 1030.8 1025.6 1029.3 1022.2 ****** 1016.6 1014.9 1018.3 ****** ****** 1026.5 1028.2 ****** DAY 10 16 12 13 ** 11 5 31 ** ** 23 11 MIN. QNH PRESSURE IN HPA 1013.4 1008.7 1010.0 1008.6 ****** 1005.2 1006.8 1008.8 ****** ****** 1015.9 1017.3 ****** DAY 23 11 24 18 ** 27 24 1 ** ** 26 9 MEAN QFF PRESSURE IN HPA 1022.4 1017.2 1016.8 1011.1 ****** 1000.3 998.1 1002.4 ****** ****** 1020.1 1021.0 ****** MAX. QFF PRESSURE IN HPA 1034.3 1027.3 1030.8 1017.0 ****** 1005.6 1002.2 1009.6 ****** ****** 1024.1 1028.4 ****** DAY 10 16 12 12 ** 1 15 31 ** ** 18 11 MIN. QFF PRESSURE IN HPA 1012.6 1005.5 1005.7 1000.8 ****** 992.2 994.6 997.2 ****** ****** 1010.0 1014.9 ****** DAY 23 11 31 18 ** 27 24 1 ** ** 26 4 ======================================================================================================================= 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 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.5 9.9 12.3 20.1 26.5 30.1 32.4 31.0 28.7 19.6 15.7 10.4 20.1 MINIMUN AIR TEMPERATURE (C) 0.6 4.5 6.1 13.2 18.0 22.2 25.5 22.5 18.8 8.6 6.3 0.7 12.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 7 23 30 22 10 0 0 0 92 DAYS WITH MINIMUM TEMP. <=-4 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH FREEZING MIN.<= 0 14 5 0 0 0 0 0 0 0 0 2 14 35 TEMPERATURE RECORDS LOWEST(C) -6.1 -1.8 0.4 7.0 11.0 15.6 19.6 16.8 13.8 2.6 -1.0 -3.2 -6.1 DAY 16 19 15 1 11 1 25 27 26 9 18 7 MAXIMUM AIR TEMPERATURE (C) 8.8 15.4 18.4 26.7 33.4 37.1 36.7 35.9 34.1 25.9 21.6 16.6 25.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 27 30 31 31 29 4 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) 18.0 22.0 24.8 32.6 39.6 42.0 40.4 38.6 36.4 35.4 29.8 19.6 42.0 DAY 30 22 19 22 28 21 4 13 1 2 2 25 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 10.9 12.3 13.5 15.4 14.9 11.2 13.4 15.3 17.3 15.3 15.9 13.7 MEAN DAILY TEMP. (MDT) (C) 4.7 9.9 12.3 19.9 25.7 29.7 31.1 29.2 26.4 17.3 13.9 8.6 19.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 32.0 151.5 260.4 313.3 253.8 163.5 14.6 0.1 0.0 1189.2 HEATING DEG. DAYS(BASE 18 0C) 411.8 226.1 177.9 24.1 0.0 0.0 0.0 0.0 0.0 55.9 134.1 289.9 1319.8 DEWPOINT (MEAN C) -0.2 2.2 1.0 5.3 2.4 -0.2 0.2 -1.1 -2.8 -5.1 -1.4 -4.9 -0.4 MIXING RATIO (G/KG) 4.39 5.44 5.00 6.59 5.36 4.53 4.54 4.09 3.60 3.10 4.13 3.12 4.49 VAPOUR PRESSURE (HPA) 6.20 7.65 7.02 9.22 7.50 6.33 6.33 5.73 5.06 4.38 5.83 4.43 6.31 SATURATION DEF. (HPA) 2.58 5.06 8.01 15.64 29.00 38.02 43.28 40.27 35.94 20.17 13.42 8.95 21.70 RELATIVE HUMIDITY (MEAN %) 75 64 51 42 23 16 13 13 13 19 33 36 33 RELATIVE HUMIDITY (MAX. %) 93 90 76 66 38 26 19 18 19 25 44 51 47 RELATIVE HUMIDITY (MIN. %) 55 39 31 24 13 9 10 10 10 15 25 26 22 RELATIVE HUMIDITY (MEAN% 03UTC) 89 82 73 61 36 24 19 18 19 25 44 50 45 RELATIVE HUMIDITY (MEAN% 09UTC) 64 48 37 29 16 11 12 12 11 17 28 29 26 RELATIVE HUMIDITY (MEAN% 15UTC) 66 50 39 31 17 12 11 12 12 17 30 33 28 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 38.9 103.3 17.9 35.8 0.6 0.4 0.0 0.0 0.0 0.0 0.0 0.0 196.9 DAYS WITH PRECIPITATION >=10 2 4 0 2 0 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 5 2 4 2 2 0 0 0 0 0 0 0 0 10 DAYS WITH PRECIPITATION >= 1 5 6 4 3 0 0 0 0 0 0 0 0 18 DAYS WITH PRECIPITATION 10 9 7 6 3 1 0 0 0 0 0 1 37 GREATEST DAILY PRECIPITATION 17.7 32.0 7.1 20.0 0.3 0.4 0.0 0.0 0.0 0.0 0.0 0.0 32.0 DAY 14 4 10 14 18 5 ** ** ** ** ** ** DAY WITH THUNDER STORM 0 0 1 0 1 1 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 0 2 0 1 2 2 5 0 1 0 2 0 15 WIND DIRECTION (PREVAILING) 135 135 45 135 135 360 360 360 360 135 135 135 360 PREVAILING WIND SPEED(KNOTS) 5.6 8.8 7.6 8.1 7.4 14.4 15.9 14.8 14.7 7.2 8.5 6.0 14.6 PREVAILING WIND PERCENT 13.6 7.4 10.2 13.3 12.0 24.1 53.4 41.9 22.7 20.6 16.0 7.7 11.7 CALMS PERCENT OF WIND 61.3 70.2 51.1 53.3 50.7 35.9 9.3 18.7 42.0 52.3 54.0 65.8 48.2 NO. OF WIND OBSERVATION 243 215 235 240 225 237 161 155 150 155 150 155 2321 VECTOR WIND DIRECTION (MEAN) 128 212 297 119 343 28 15 16 26 119 185 218 26 VECTOR WIND MAGNITUDE(KNOTS) 0.9 0.8 0.4 0.9 0.2 5.1 11.1 8.8 3.7 1.9 1.7 1.2 2.0 WIND STEADINESES (MEAN %) 45.0 33.3 10.0 25.0 4.5 70.8 87.4 82.2 59.7 51.4 47.2 52.2 38.5 WIND SPEED (MEAN KNOTS) 2.0 2.4 4.0 3.6 4.4 7.2 12.7 10.7 6.2 3.7 3.6 2.3 5.2 FASTEST WIND DIRECTION 150 260 310 360 20 360 10 10 360 30 270 250 310 FASTEST WIND SPEED (KNOTS) 12 17 39 19 25 27 29 25 27 21 16 14 39 DAY 4 15 22 5 30 30 16 20 5 21 3 17 DAYS WITH SKY CLEAR (0-2)/8 8 9 11 7 17 26 30 31 29 29 18 21 236 DAYS WITH P.CLOUDY (3-6)/8 11 11 12 20 14 3 1 0 1 2 12 9 96 DAYS WITH CLOUDY (7-8)/8 12 8 8 3 0 1 0 0 0 0 0 1 33 DAYS WITH VISIBILITY =< 2 KM 1 3 1 1 1 0 1 0 0 0 0 0 8 DURATION OF SUNSHINE HOURS 137.7 144.4 227.3 250.2 330.8 338.6 376.8 366.0 322.5 307.8 220.0 241.2 3263.3 ======================================================================================================================= 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 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 884.7 883.6 881.9 880.5 878.8 875.6 873.9 876.5 878.7 886.3 885.1 886.7 881.0 MAX. QFE PRESSURE IN HPA 891.6 890.9 889.0 888.1 885.5 880.8 878.9 881.5 883.2 891.7 892.3 893.8 893.8 DAY-HOUR 6- 6 8- 6 18- 6 1- 6 10- 6 23- 3 28- 6 18- 6 23- 6 17- 6 24- 6 27- 6 MIN. QFE PRESSURE IN HPA 874.0 875.6 870.7 873.8 870.5 871.4 870.1 871.6 873.9 878.8 877.8 879.8 870.1 DAY-HOUR 14-12 15-12 22- 0 13-12 29-15 13-15 8-12 12-12 3-12 2-12 14-12 5- 3 MEAN QNH PRESSURE IN HPA 1022.8 1021.6 1019.7 1018.0 1016.1 1012.5 1010.6 1013.5 1016.0 1024.5 1023.2 1025.0 1018.6 MAX. QNH PRESSURE IN HPA 1030.5 1029.8 1027.6 1026.6 1023.7 1018.4 1016.3 1019.2 1021.1 1030.7 1031.3 1033.0 1033.0 DAY-HOUR 6- 6 8- 6 18- 6 1- 6 10- 6 23- 3 28- 6 18- 6 23- 6 17- 6 24- 6 27- 6 MIN. QNH PRESSURE IN HPA 1010.7 1012.5 1007.0 1010.5 1006.8 1007.8 1006.4 1008.0 1010.6 1016.1 1015.0 1017.3 1006.4 DAY-HOUR 14-12 15-12 22- 0 13-12 29-15 13-15 8-12 12-12 3-12 2-12 14-12 5- 3 MEAN QFF PRESSURE IN HPA 1024.2 1020.0 1017.0 1011.3 1006.3 1001.4 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1031.8 1030.5 1026.9 1023.0 1017.3 1008.5 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 19-18 8- 6 17-18 1- 3 10- 3 23- 6 **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1013.2 1008.5 1000.8 1002.8 994.9 996.2 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 14-12 15-12 22- 0 12- 0 29-12 13-12 **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 884.4 882.8 881.1 880.1 878.3 875.4 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 889.4 888.7 887.5 886.7 883.3 879.4 ****** ****** ****** ****** ****** ****** ****** DAY 27 8 18 1 11 23 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 875.8 876.7 870.7 874.2 872.2 872.4 ****** ****** ****** ****** ****** ****** ****** DAY 15 24 22 13 30 4 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1022.5 1020.6 1018.8 1017.6 1015.6 1012.4 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1028.1 1027.3 1025.9 1025.0 1021.2 1016.8 ****** ****** ****** ****** ****** ****** ****** DAY 27 8 18 1 11 23 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1012.8 1013.8 1007.0 1011.0 1008.7 1008.9 ****** ****** ****** ****** ****** ****** ****** DAY 15 24 22 13 30 4 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1023.6 1018.6 1015.9 1010.7 1006.1 1001.2 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1029.6 1027.7 1025.1 1020.8 1015.6 1007.0 ****** ****** ****** ****** ****** ****** ****** DAY 7 8 18 1 11 24 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1016.1 1010.2 1000.8 1002.8 997.5 996.5 ****** ****** ****** ****** ****** ****** ****** DAY 15 16 22 12 30 14 ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 884.9 883.7 882.3 881.2 879.8 876.5 874.6 877.2 879.4 887.0 885.6 887.2 881.6 MAX. QFE PRESSURE IN HPA 889.4 889.6 888.4 887.6 884.4 880.8 877.9 880.1 882.2 891.4 891.2 892.8 892.8 DAY 27 8 18 1 10 23 28 19 23 17 24 27 MIN. QFE PRESSURE IN HPA 877.4 878.0 872.6 875.4 874.4 874.1 871.7 874.9 876.1 880.5 879.1 879.8 871.7 DAY 15 16 22 13 30 13 14 12 3 3 14 5 MEAN QNH PRESSURE IN HPA 1022.9 1021.7 1020.1 1018.8 1017.3 1013.6 1011.4 1014.3 1016.8 1025.4 1023.8 1025.6 1019.3 MAX. QNH PRESSURE IN HPA 1028.1 1028.3 1026.9 1026.0 1022.4 1018.4 1015.1 1017.6 1020.0 1030.3 1030.1 1031.9 1031.9 DAY 27 8 18 1 10 23 28 19 23 17 24 27 MIN. QNH PRESSURE IN HPA 1014.6 1015.2 1009.2 1012.3 1011.2 1010.9 1008.2 1011.8 1013.1 1018.1 1016.5 1017.3 1008.2 DAY 15 16 22 13 30 13 14 12 3 3 14 5 MEAN QFF PRESSURE IN HPA 1024.8 1020.7 1018.1 1012.8 1008.5 1002.8 1000.0 1004.1 1008.1 1021.7 1021.7 1026.5 1014.1 MAX. QFF PRESSURE IN HPA 1029.5 1029.2 1026.7 1023.0 1017.3 1008.5 1004.3 1008.3 1012.7 1028.8 1030.8 1031.7 1031.7 DAY 27 8 18 1 10 23 24 26 30 9 24 8 MIN. QFF PRESSURE IN HPA 1018.4 1012.1 1003.8 1005.2 1001.2 999.2 996.0 1000.8 1002.3 1010.6 1011.4 1017.2 996.0 DAY 14 15 22 12 29 12 14 23 5 3 14 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 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 886.3 885.2 883.5 882.2 880.3 876.9 875.1 877.8 880.1 887.9 886.7 888.4 882.5 MAX. QFE PRESSURE IN HPA 891.6 890.9 889.0 888.1 885.5 880.7 878.9 881.5 883.2 891.7 892.3 893.8 893.8 DAY 6 8 18 1 10 23 28 18 23 17 24 27 MIN. QFE PRESSURE IN HPA 879.4 879.6 873.7 877.1 875.3 874.4 871.4 874.9 876.6 881.5 880.0 881.4 871.4 DAY 14 23 22 12 29 13 14 12 3 3 14 5 MEAN QNH PRESSURE IN HPA 1024.6 1023.3 1021.5 1020.0 1017.9 1014.0 1012.0 1015.0 1017.6 1026.4 1025.0 1026.9 1020.4 MAX. QNH PRESSURE IN HPA 1030.5 1029.8 1027.6 1026.6 1023.7 1018.3 1016.3 1019.2 1021.1 1030.7 1031.3 1033.0 1033.0 DAY 6 8 18 1 10 23 28 18 23 17 24 27 MIN. QNH PRESSURE IN HPA 1016.8 1017.0 1010.4 1014.2 1012.2 1011.2 1007.8 1011.8 1013.7 1019.2 1017.5 1019.1 1007.8 DAY 14 23 22 12 29 13 14 12 3 3 14 5 MEAN QFF PRESSURE IN HPA 1026.3 1021.8 1018.7 1013.1 1007.1 1002.6 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1031.3 1030.5 1026.7 1022.3 1013.0 1008.5 ****** ****** ****** ****** ****** ****** ****** DAY 3 8 17 1 12 23 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1019.0 1013.6 1004.9 1006.2 1000.0 998.8 ****** ****** ****** ****** ****** ****** ****** DAY 14 15 22 27 29 19 ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 884.7 883.8 882.4 880.9 879.2 875.9 874.3 876.7 878.8 886.1 884.7 886.2 881.1 MAX. QFE PRESSURE IN HPA 889.9 889.9 887.4 886.7 884.2 879.9 877.9 879.8 881.7 890.0 890.1 890.3 890.3 DAY 6 8 17 1 10 23 28 18 23 9 24 26 MIN. QFE PRESSURE IN HPA 876.8 878.0 872.7 875.2 873.7 873.2 871.1 873.0 875.7 880.0 877.9 880.3 871.1 DAY 14 15 22 13 29 13 14 12 3 3 14 5 MEAN QNH PRESSURE IN HPA 1022.7 1021.8 1020.2 1018.5 1016.6 1012.8 1011.0 1013.8 1016.1 1024.3 1022.8 1024.5 1018.8 MAX. QNH PRESSURE IN HPA 1028.6 1028.6 1025.8 1025.0 1022.2 1017.4 1015.1 1017.3 1019.4 1028.7 1028.9 1029.1 1029.1 DAY 6 8 17 1 10 23 28 18 23 9 24 26 MIN. QNH PRESSURE IN HPA 1013.9 1015.2 1009.3 1012.1 1010.4 1009.8 1007.5 1009.6 1012.7 1017.5 1015.1 1017.8 1007.5 DAY 14 15 22 13 29 13 14 12 3 3 14 5 MEAN QFF PRESSURE IN HPA 1023.5 1020.0 1017.7 1011.6 1006.0 1001.3 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1029.1 1029.0 1021.7 1020.7 1011.8 1007.7 ****** ****** ****** ****** ****** ****** ****** DAY 6 8 26 1 12 23 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1016.0 1011.2 1003.8 1005.2 998.2 997.7 ****** ****** ****** ****** ****** ****** ****** DAY 14 15 22 23 29 19 ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 883.4 882.5 880.6 879.1 877.4 874.3 873.0 875.3 877.4 884.8 883.8 885.4 879.8 MAX. QFE PRESSURE IN HPA 889.2 888.6 886.0 884.0 882.6 878.5 876.7 878.1 880.5 888.9 889.4 889.2 889.4 DAY 6 8 17 1 10 23 26 18 23 17 24 26 MIN. QFE PRESSURE IN HPA 874.0 875.6 871.0 873.8 870.6 871.5 870.1 871.6 873.9 878.8 877.8 879.9 870.1 DAY 14 15 22 13 29 13 8 12 3 2 14 5 MEAN QNH PRESSURE IN HPA 1021.3 1020.3 1018.2 1016.4 1014.6 1011.1 1009.6 1012.2 1014.6 1022.9 1021.8 1023.5 1017.2 MAX. QNH PRESSURE IN HPA 1027.8 1027.2 1024.2 1022.0 1020.4 1015.8 1013.8 1015.4 1018.1 1027.5 1028.1 1027.8 1028.1 DAY 6 8 17 1 10 23 26 18 23 17 24 26 MIN. QNH PRESSURE IN HPA 1010.7 1012.5 1007.4 1010.5 1006.9 1007.9 1006.4 1008.0 1010.6 1016.1 1015.0 1017.4 1006.4 DAY 14 15 22 13 29 13 8 12 3 2 14 5 MEAN QFF PRESSURE IN HPA 1022.4 1018.3 1015.3 1009.6 1004.7 1000.0 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1028.5 1027.5 1022.8 1017.7 1012.4 1006.6 ****** ****** ****** ****** ****** ****** ****** DAY 6 8 17 1 11 23 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1013.2 1008.5 1002.3 1003.2 994.9 996.2 ****** ****** ****** ****** ****** ****** ****** DAY 14 15 22 29 29 13 ** ** ** ** ** ** ======================================================================================================================= 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 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 884.4 883.2 881.1 879.3 877.6 874.3 873.0 875.5 877.8 885.6 884.6 886.3 880.2 MAX. QFE PRESSURE IN HPA 890.2 889.5 886.5 884.1 882.8 878.2 876.5 878.7 881.2 890.0 889.8 890.0 890.2 DAY 6 8 17 1 10 23 27 18 30 16 24 7 MIN. QFE PRESSURE IN HPA 874.6 876.1 871.4 873.9 870.5 871.4 870.2 872.0 874.0 878.9 878.6 881.0 870.2 DAY 14 15 22 13 29 13 8 12 3 2 14 4 MEAN QNH PRESSURE IN HPA 1022.4 1021.1 1018.7 1016.7 1014.8 1011.1 1009.6 1012.4 1015.0 1023.8 1022.6 1024.5 1017.7 MAX. QNH PRESSURE IN HPA 1029.0 1028.2 1024.8 1022.1 1020.6 1015.5 1013.6 1016.0 1018.8 1028.7 1028.5 1028.7 1029.0 DAY 6 8 17 1 10 23 27 18 30 16 24 7 MIN. QNH PRESSURE IN HPA 1011.4 1013.1 1007.8 1010.6 1006.8 1007.8 1006.5 1008.5 1010.7 1016.3 1015.9 1018.6 1006.5 DAY 14 15 22 13 29 13 8 12 3 2 14 4 MEAN QFF PRESSURE IN HPA 1024.2 1020.1 1016.7 1010.6 1006.0 1000.4 998.2 1002.1 1006.2 1020.1 1020.5 1025.3 1012.5 MAX. QFF PRESSURE IN HPA 1030.4 1029.3 1023.9 1019.1 1015.7 1006.8 1002.5 1005.4 1011.1 1026.6 1028.9 1032.6 1032.6 DAY 6 8 17 1 10 23 28 28 30 9 24 7 MIN. QFF PRESSURE IN HPA 1013.9 1009.0 1003.3 1003.9 996.5 996.7 994.5 998.4 999.7 1008.6 1010.8 1018.0 994.5 DAY 14 15 22 27 29 19 8 12 1 2 14 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 885.3 884.2 882.3 880.9 878.8 875.9 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 891.0 890.1 888.9 885.6 882.9 879.3 ****** ****** ****** ****** ****** ****** ****** DAY 6 8 17 1 11 23 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 874.3 877.2 872.5 875.6 871.0 873.2 ****** ****** ****** ****** ****** ****** ****** DAY 14 23 12 12 29 3 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1023.4 1022.2 1020.1 1018.5 1016.2 1012.9 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.9 1028.9 1027.5 1023.8 1020.8 1016.7 ****** ****** ****** ****** ****** ****** ****** DAY 6 8 17 1 11 23 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1011.1 1014.3 1009.1 1012.5 1007.4 1009.8 ****** ****** ****** ****** ****** ****** ****** DAY 14 23 12 12 29 3 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1025.0 1020.8 1017.3 1011.5 1005.9 1001.5 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1031.8 1029.6 1026.9 1019.5 1014.6 1008.1 ****** ****** ****** ****** ****** ****** ****** DAY 19 8 17 1 11 23 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1014.2 1011.0 1003.1 1004.4 995.8 997.5 ****** ****** ****** ****** ****** ****** ****** DAY 14 15 21 27 29 19 ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 884.6 883.8 882.7 880.3 878.5 875.6 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 890.2 889.3 886.8 884.9 881.9 879.0 ****** ****** ****** ****** ****** ****** ****** DAY 26 8 31 1 11 22 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 874.7 876.7 871.6 874.4 871.9 872.9 ****** ****** ****** ****** ****** ****** ****** DAY 14 23 21 13 29 3 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1022.7 1021.7 1020.5 1017.8 1015.8 1012.6 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.0 1028.0 1025.1 1023.0 1019.6 1016.4 ****** ****** ****** ****** ****** ****** ****** DAY 26 8 31 1 11 22 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1011.5 1013.8 1008.0 1011.2 1008.4 1009.5 ****** ****** ****** ****** ****** ****** ****** DAY 14 23 21 13 29 3 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1023.7 1020.0 1017.1 1010.7 1005.7 1001.0 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1030.0 1028.8 1023.2 1018.8 1012.9 1007.0 ****** ****** ****** ****** ****** ****** ****** DAY 6 8 23 1 11 23 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1014.6 1010.5 1001.4 1004.2 996.7 996.6 ****** ****** ****** ****** ****** ****** ****** DAY 14 15 21 27 29 21 ** ** ** ** ** ** ======================================================================================================================= 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 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.0 9.8 16.7 21.6 28.2 33.5 34.4 33.7 24.9 20.7 18.8 9.2 21.7 MINIMUN AIR TEMPERATURE (C) 1.0 2.4 8.9 11.7 18.8 23.7 26.0 24.9 14.8 10.9 9.2 1.0 12.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 7 25 31 28 0 0 0 0 93 DAYS WITH MINIMUM TEMP. <=-4 5 0 0 0 0 0 0 0 0 0 0 5 10 DAYS WITH FREEZING MIN.<= 0 14 8 0 0 0 0 0 0 0 0 0 16 38 TEMPERATURE RECORDS LOWEST(C) -5.2 -2.8 3.0 1.0 12.8 19.4 22.6 19.4 10.8 4.4 4.2 -7.0 -7.0 DAY 11 5 4 6 12 2 3 12 27 14 27 9 MAXIMUM AIR TEMPERATURE (C) 14.7 15.1 21.4 27.0 32.9 38.0 38.9 38.4 30.6 26.3 24.3 14.6 26.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 28 30 31 31 15 5 0 0 147 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.4 19.8 27.4 36.0 36.4 42.4 42.0 42.4 38.4 32.6 27.8 25.2 42.4 DAY 5 2 31 27 16 22 19 2 1 1 5 1 DIF. BETWEEN (MAX.-MIN.) (C) 13.7 12.7 12.5 15.3 14.1 14.3 12.9 13.5 15.8 15.4 15.1 13.6 14.0 MEAN DAILY TEMP. (MDT) (C) 7.9 8.7 15.1 19.3 25.9 30.8 32.4 31.7 22.7 18.6 16.7 7.8 19.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 35.7 150.7 295.2 354.2 331.0 60.3 9.2 0.0 0.0 1236.3 HEATING DEG. DAYS(BASE 18 0C) 314.6 260.2 90.8 35.7 0.0 0.0 0.0 0.0 0.0 26.0 52.2 316.5 1096.0 DEWPOINT (MEAN C) -4.5 -3.2 2.6 0.3 2.0 4.5 3.8 0.6 -7.4 -1.8 0.6 -3.8 -0.5 MIXING RATIO (G/KG) 3.37 3.57 5.49 4.63 5.22 6.22 5.98 4.71 2.61 3.96 4.70 3.60 4.51 VAPOUR PRESSURE (HPA) 4.75 5.02 7.71 6.51 7.31 8.64 8.29 6.57 3.69 5.59 6.64 5.08 6.32 SATURATION DEF. (HPA) 7.38 7.87 12.09 21.32 32.17 44.68 47.33 47.29 29.35 20.09 16.13 7.62 24.44 RELATIVE HUMIDITY (MEAN %) 42 45 44 27 20 17 16 13 12 23 31 43 28 RELATIVE HUMIDITY (MAX. %) 60 73 72 43 29 23 20 17 15 32 42 66 41 RELATIVE HUMIDITY (MIN. %) 30 30 29 19 15 14 13 10 9 18 22 28 20 RELATIVE HUMIDITY (MEAN% 03UTC) 57 73 70 42 28 23 20 17 15 32 41 64 40 RELATIVE HUMIDITY (MEAN% 09UTC) 35 34 34 22 17 15 14 11 11 19 26 36 23 RELATIVE HUMIDITY (MEAN% 15UTC) 39 35 37 23 17 16 14 11 10 21 29 34 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.0 13.8 9.9 3.1 0.2 0.0 3.0 0.0 0.0 2.0 0.4 13.2 77.6 DAYS WITH PRECIPITATION >=10 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 2 1 0 0 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 1 3 3 3 1 0 0 1 0 0 1 0 2 14 DAYS WITH PRECIPITATION 3 3 8 3 1 0 1 0 1 1 2 3 26 GREATEST DAILY PRECIPITATION 19.0 5.8 3.0 2.9 0.2 0.0 3.0 0.0 0.0 2.0 0.4 9.0 19.0 DAY 25 19 11 18 2 ** 9 ** ** 24 18 5 DAY WITH THUNDER STORM 1 0 0 0 1 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 0 2 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 1 0 1 1 2 2 5 3 1 0 1 2 19 WIND DIRECTION (PREVAILING) 135 135 135 135 135 45 360 360 360 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 7.6 6.7 7.4 6.8 8.3 10.8 16.1 13.5 12.7 7.2 6.3 7.2 7.2 PREVAILING WIND PERCENT 11.6 17.9 25.2 12.0 12.8 29.3 37.4 36.1 19.3 14.8 16.7 16.8 13.4 CALMS PERCENT OF WIND 61.3 45.0 39.4 44.7 28.9 18.7 14.2 13.5 34.7 43.9 50.7 52.3 37.2 NO. OF WIND OBSERVATION 155 140 155 150 149 150 155 155 150 155 150 155 1819 VECTOR WIND DIRECTION (MEAN) 200 178 182 112 62 38 18 24 44 147 211 194 38 VECTOR WIND MAGNITUDE(KNOTS) 0.7 0.9 1.6 0.5 0.6 5.8 8.3 7.2 3.1 1.1 1.9 1.8 1.5 WIND STEADINESES (MEAN %) 24.1 22.5 33.3 11.6 9.8 67.4 76.1 75.8 49.2 26.8 51.4 47.4 26.3 WIND SPEED (MEAN KNOTS) 2.9 4.0 4.8 4.3 6.1 8.6 10.9 9.5 6.3 4.1 3.7 3.8 5.7 FASTEST WIND DIRECTION 270 270 300 250 10 10 360 10 20 330 260 190 190 FASTEST WIND SPEED (KNOTS) 23 16 23 17 25 25 27 25 25 19 25 35 35 DAY 25 14 8 3 31 9 25 16 4 12 26 5 DAYS WITH SKY CLEAR (0-2)/8 19 15 11 15 11 29 29 28 24 20 16 24 241 DAYS WITH P.CLOUDY (3-6)/8 9 11 11 11 16 1 2 3 6 11 14 6 101 DAYS WITH CLOUDY (7-8)/8 3 2 9 4 4 0 0 0 0 0 0 1 23 DAYS WITH VISIBILITY =< 2 KM 0 1 2 0 1 0 1 0 0 0 1 2 8 DURATION OF SUNSHINE HOURS 228.1 229.4 222.9 262.3 286.2 358.1 364.6 352.7 309.3 274.5 239.2 251.4 3378.7 ======================================================================================================================= 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 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 884.2 881.0 882.0 881.1 879.2 873.2 870.9 873.4 881.3 885.1 884.7 885.8 880.2 MAX. QFE PRESSURE IN HPA 893.4 886.6 888.8 890.4 884.7 878.2 874.4 877.5 888.6 890.9 889.9 893.3 893.4 DAY-HOUR 28- 6 26- 6 4- 6 6- 6 8- 6 1- 3 3- 3 16- 6 23- 6 10- 6 2- 6 8- 6 MIN. QFE PRESSURE IN HPA 875.5 871.7 874.6 872.9 873.0 867.7 866.3 868.2 872.5 878.9 875.1 873.5 866.3 DAY-HOUR 17- 3 12-12 15-12 3-12 1-12 29-12 20-12 2-12 1-12 2-12 26- 9 4-12 MEAN QNH PRESSURE IN HPA 1022.2 1018.6 1019.8 1018.7 1016.6 1009.9 1007.3 1010.1 1018.9 1023.2 1022.8 1024.0 1017.7 MAX. QNH PRESSURE IN HPA 1032.6 1024.9 1027.4 1029.2 1022.8 1015.5 1011.2 1014.7 1027.2 1029.8 1028.6 1032.5 1032.6 DAY-HOUR 28- 6 26- 6 4- 6 6- 6 8- 6 1- 3 3- 3 16- 6 23- 6 10- 6 2- 6 8- 6 MIN. QNH PRESSURE IN HPA 1012.4 1008.2 1011.4 1009.5 1009.6 1003.7 1002.1 1004.2 1009.1 1016.3 1012.0 1010.2 1002.1 DAY-HOUR 17- 3 12-12 15-12 3-12 1-12 29-12 20-12 2-12 1-12 2-12 26- 9 4-12 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 884.3 881.3 882.4 882.0 880.1 874.2 871.8 874.3 882.0 885.9 885.2 886.0 880.8 MAX. QFE PRESSURE IN HPA 890.8 885.1 887.6 890.0 883.7 878.2 874.4 877.2 887.8 890.2 888.5 892.4 892.4 DAY 28 28 4 6 8 1 3 16 23 10 3 8 MIN. QFE PRESSURE IN HPA 875.5 876.1 875.0 874.3 875.3 869.9 868.7 870.4 874.7 880.6 876.6 873.9 868.7 DAY 17 12 13 3 2 30 21 3 1 3 26 5 MEAN QNH PRESSURE IN HPA 1022.4 1019.0 1020.2 1019.7 1017.6 1011.0 1008.2 1011.1 1019.8 1024.1 1023.4 1024.2 1018.4 MAX. QNH PRESSURE IN HPA 1029.6 1023.2 1026.0 1028.7 1021.7 1015.5 1011.2 1014.3 1026.3 1029.0 1027.1 1031.4 1031.4 DAY 28 28 4 6 8 1 3 16 23 10 3 8 MIN. QNH PRESSURE IN HPA 1012.4 1013.1 1011.9 1011.1 1012.2 1006.1 1004.8 1006.7 1011.5 1018.2 1013.7 1010.6 1004.8 DAY 17 12 13 3 2 30 21 3 1 3 26 5 MEAN QFF PRESSURE IN HPA 1023.2 1019.0 1016.8 1014.2 1008.7 999.6 996.2 999.5 1013.0 1019.5 1019.6 1025.0 1012.9 MAX. QFF PRESSURE IN HPA 1031.5 1025.9 1025.7 1029.5 1013.9 1005.3 999.9 1003.2 1020.8 1025.5 1024.7 1036.6 1036.6 DAY 28 21 4 6 8 1 3 16 23 10 22 8 MIN. QFF PRESSURE IN HPA 1011.5 1012.0 1005.5 1004.2 1004.3 993.6 992.7 993.1 1001.4 1010.7 1008.4 1004.3 992.7 DAY 6 3 13 3 2 30 21 3 1 3 26 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 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 885.9 882.7 883.6 882.7 880.6 874.5 872.1 874.8 882.7 886.9 886.4 887.4 881.7 MAX. QFE PRESSURE IN HPA 893.4 886.6 888.8 890.4 884.7 878.1 874.3 877.5 888.6 890.9 889.9 893.3 893.4 DAY 28 26 4 6 8 1 3 16 23 10 2 8 MIN. QFE PRESSURE IN HPA 877.3 876.4 877.5 874.8 876.7 870.1 868.6 870.6 875.0 881.7 877.2 877.4 868.6 DAY 17 12 15 3 2 30 20 3 1 3 26 4 MEAN QNH PRESSURE IN HPA 1024.1 1020.5 1021.6 1020.5 1018.2 1011.3 1008.5 1011.7 1020.5 1025.2 1024.7 1025.8 1019.4 MAX. QNH PRESSURE IN HPA 1032.6 1024.9 1027.4 1029.2 1022.8 1015.4 1011.1 1014.7 1027.2 1029.8 1028.6 1032.5 1032.6 DAY 28 26 4 6 8 1 3 16 23 10 2 8 MIN. QNH PRESSURE IN HPA 1014.5 1013.4 1014.7 1011.6 1013.8 1006.4 1004.7 1006.9 1011.9 1019.4 1014.3 1014.6 1004.7 DAY 17 12 15 3 2 30 20 3 1 3 26 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 883.9 881.1 882.1 881.2 879.4 873.5 871.1 873.7 881.4 885.0 884.4 885.6 880.2 MAX. QFE PRESSURE IN HPA 891.5 884.9 887.0 889.7 882.8 877.2 873.7 876.4 887.6 889.3 888.8 891.0 891.5 DAY 28 28 4 5 8 9 4 16 23 10 2 8 MIN. QFE PRESSURE IN HPA 876.7 873.9 876.0 873.9 875.9 869.6 867.8 869.6 874.0 880.6 875.1 874.2 867.8 DAY 17 12 15 3 1 29 20 1 1 3 26 4 MEAN QNH PRESSURE IN HPA 1021.9 1018.7 1019.9 1018.9 1016.9 1010.2 1007.5 1010.4 1019.1 1023.1 1022.4 1023.7 1017.7 MAX. QNH PRESSURE IN HPA 1030.4 1023.0 1025.4 1028.4 1020.6 1014.3 1010.4 1013.4 1026.0 1028.0 1027.4 1029.9 1030.4 DAY 28 28 4 5 8 9 4 16 23 10 2 8 MIN. QNH PRESSURE IN HPA 1013.8 1010.6 1013.0 1010.6 1012.9 1005.8 1003.8 1005.8 1010.7 1018.2 1012.0 1011.0 1003.8 DAY 17 12 15 3 1 29 20 1 1 3 26 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 882.9 879.6 880.6 879.7 877.8 871.9 869.8 872.1 879.9 883.5 883.3 884.5 878.8 MAX. QFE PRESSURE IN HPA 890.0 883.5 885.2 888.6 880.6 875.2 872.4 874.6 886.4 887.0 887.4 890.0 890.0 DAY 28 4 4 5 8 9 4 16 23 10 2 10 MIN. QFE PRESSURE IN HPA 876.5 871.7 874.6 872.9 873.0 867.7 866.3 868.2 872.5 878.9 875.2 873.5 866.3 DAY 25 12 15 3 1 29 20 2 1 2 26 4 MEAN QNH PRESSURE IN HPA 1020.8 1017.1 1018.2 1017.2 1015.1 1008.4 1006.1 1008.6 1017.4 1021.4 1021.2 1022.6 1016.2 MAX. QNH PRESSURE IN HPA 1028.7 1021.4 1023.3 1027.2 1018.2 1012.1 1008.9 1011.4 1024.7 1025.4 1025.8 1028.7 1028.7 DAY 28 4 4 5 8 9 4 16 23 10 2 10 MIN. QNH PRESSURE IN HPA 1013.6 1008.2 1011.4 1009.5 1009.6 1003.7 1002.1 1004.2 1009.1 1016.3 1012.1 1010.2 1002.1 DAY 25 12 15 3 1 29 20 2 1 2 26 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 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 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 883.8 880.4 881.3 880.0 878.0 872.0 869.9 872.3 880.4 884.5 884.3 885.4 879.4 MAX. QFE PRESSURE IN HPA 890.0 885.0 885.7 890.0 880.7 875.3 872.6 874.2 886.7 887.6 887.7 890.7 890.7 DAY 28 4 3 5 8 8 4 16 23 10 2 10 MIN. QFE PRESSURE IN HPA 877.2 872.3 875.9 873.6 873.8 867.8 866.5 868.5 873.0 879.3 877.6 873.8 866.5 DAY 25 12 12 3 1 30 20 3 1 2 26 4 MEAN QNH PRESSURE IN HPA 1021.7 1017.9 1019.0 1017.5 1015.2 1008.5 1006.2 1008.8 1018.0 1022.5 1022.3 1023.6 1016.8 MAX. QNH PRESSURE IN HPA 1028.7 1023.1 1023.9 1028.7 1018.3 1012.2 1009.2 1011.0 1025.0 1026.0 1026.2 1029.5 1029.5 DAY 28 4 3 5 8 8 4 16 23 10 2 10 MIN. QNH PRESSURE IN HPA 1014.3 1008.8 1012.9 1010.3 1010.5 1003.8 1002.3 1004.6 1009.6 1016.7 1014.8 1010.5 1002.3 DAY 25 12 12 3 1 30 20 3 1 2 26 4 MEAN QFF PRESSURE IN HPA 1022.5 1018.0 1015.5 1011.9 1006.2 996.9 994.0 997.2 1011.1 1017.9 1018.4 1024.5 1011.2 MAX. QFF PRESSURE IN HPA 1030.3 1024.2 1023.5 1028.7 1011.2 1002.2 998.1 1000.5 1019.1 1022.6 1022.3 1034.5 1034.5 DAY 28 4 3 5 8 9 13 16 22 10 22 8 MIN. QFF PRESSURE IN HPA 1012.8 1007.5 1007.6 1003.4 1002.7 990.7 989.9 990.8 999.8 1009.1 1009.5 1005.1 989.9 DAY 5 3 12 27 1 30 20 3 1 2 26 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 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 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.0 10.6 14.3 21.4 27.3 32.3 35.9 33.5 27.8 22.1 16.6 7.5 21.5 MINIMUN AIR TEMPERATURE (C) 0.7 3.2 5.7 12.1 17.8 22.2 28.2 25.2 16.3 11.4 5.5 3.2 12.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 23 31 28 2 0 0 0 88 DAYS WITH MINIMUM TEMP. <=-4 0 1 0 0 0 0 0 0 0 0 2 0 3 DAYS WITH FREEZING MIN.<= 0 17 8 7 0 0 0 0 0 0 0 3 7 42 TEMPERATURE RECORDS LOWEST(C) -3.6 -4.4 -3.8 5.8 13.2 17.8 22.6 19.2 11.2 3.2 -4.8 -2.8 -4.8 DAY 10 27 7 1 20 4 27 27 23 20 29 1 MAXIMUM AIR TEMPERATURE (C) 14.3 15.6 19.2 26.7 31.8 37.1 40.0 38.1 33.6 28.1 23.2 11.1 26.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 21 29 31 31 27 13 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) 19.0 19.6 26.6 32.2 38.0 41.6 43.0 41.6 37.2 34.6 28.8 18.4 43.0 DAY 31 5 26 5 7 16 14 12 12 6 3 5 DIF. BETWEEN (MAX.-MIN.) (C) 13.6 12.4 13.5 14.6 14.0 14.9 11.8 12.9 17.3 16.7 17.7 7.9 14.0 MEAN DAILY TEMP. (MDT) (C) 7.5 9.4 12.5 19.4 24.8 29.7 34.1 31.6 25.0 19.8 14.3 7.1 19.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 19.7 118.9 259.8 405.8 329.7 119.9 44.2 0.0 0.0 1298.0 HEATING DEG. DAYS(BASE 18 0C) 325.1 240.6 171.7 19.1 0.0 0.0 0.0 0.0 0.0 37.7 115.5 336.8 1246.5 DEWPOINT (MEAN C) -2.4 -2.8 -0.5 2.7 0.4 1.4 4.5 0.8 -2.8 -0.6 -5.6 0.6 -0.4 MIXING RATIO (G/KG) 3.81 3.94 4.68 5.70 4.71 4.95 6.36 4.84 3.67 4.38 3.10 4.78 4.58 VAPOUR PRESSURE (HPA) 5.38 5.54 6.57 7.98 6.61 6.91 8.80 6.75 5.16 6.17 4.39 6.77 6.42 SATURATION DEF. (HPA) 6.63 7.94 10.75 18.76 30.94 43.19 51.50 46.32 34.06 22.57 16.38 3.87 24.41 RELATIVE HUMIDITY (MEAN %) 49 44 41 34 19 15 15 13 14 24 22 68 30 RELATIVE HUMIDITY (MAX. %) 77 71 64 54 29 21 21 18 20 35 29 82 43 RELATIVE HUMIDITY (MIN. %) 32 28 28 23 14 11 12 10 11 18 17 52 21 RELATIVE HUMIDITY (MEAN% 03UTC) 76 68 63 52 29 20 21 17 20 35 29 80 43 RELATIVE HUMIDITY (MEAN% 09UTC) 37 33 35 30 16 13 13 12 13 20 20 58 25 RELATIVE HUMIDITY (MEAN% 15UTC) 43 37 32 29 15 13 14 12 12 21 19 68 26 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 14.5 15.2 19.9 38.3 0.2 0.0 0.0 0.0 0.0 1.0 0.0 81.7 170.8 DAYS WITH PRECIPITATION >=10 0 0 0 2 0 0 0 0 0 0 0 3 5 DAYS WITH PRECIPITATION >= 5 1 1 2 4 0 0 0 0 0 0 0 4 12 DAYS WITH PRECIPITATION >= 1 4 4 4 5 0 0 0 0 0 1 0 7 25 DAYS WITH PRECIPITATION 8 7 5 9 1 1 0 0 0 1 0 10 42 GREATEST DAILY PRECIPITATION 7.0 7.0 6.3 10.9 0.2 0.0 0.0 0.0 0.0 1.0 0.0 41.0 41.0 DAY 26 8 15 28 29 ** ** ** ** 23 ** 6 DAY WITH THUNDER STORM 0 1 1 1 0 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH DUST 0 0 1 1 0 0 4 6 2 0 1 0 15 WIND DIRECTION (PREVAILING) 135 135 135 225 360 360 360 360 360 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 6.0 7.5 6.9 7.8 12.0 13.3 12.9 15.6 13.9 7.9 6.9 5.9 7.0 PREVAILING WIND PERCENT 18.7 18.6 20.6 14.0 20.6 19.3 40.0 42.6 12.0 14.2 10.7 21.3 13.1 CALMS PERCENT OF WIND 56.1 49.3 41.3 45.3 39.4 26.0 9.0 16.8 39.3 44.5 56.0 58.5 40.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 164 1834 VECTOR WIND DIRECTION (MEAN) 148 189 164 223 16 46 26 16 36 168 210 137 37 VECTOR WIND MAGNITUDE(KNOTS) 1.2 1.1 1.7 1.6 2.9 3.6 7.8 9.5 2.0 1.0 1.3 1.5 1.5 WIND STEADINESES (MEAN %) 46.2 29.7 38.6 38.1 50.9 50.0 78.0 85.6 37.0 23.8 41.9 62.5 28.3 WIND SPEED (MEAN KNOTS) 2.6 3.7 4.4 4.2 5.7 7.2 10.0 11.1 5.4 4.2 3.1 2.4 5.3 FASTEST WIND DIRECTION 360 150 240 270 360 20 30 10 30 40 300 120 10 FASTEST WIND SPEED (KNOTS) 14 17 17 21 21 23 27 31 25 19 21 12 31 DAY 12 28 9 7 13 10 5 14 1 18 26 5 DAYS WITH SKY CLEAR (0-2)/8 22 12 18 9 20 22 28 31 29 28 27 7 253 DAYS WITH P.CLOUDY (3-6)/8 7 11 5 18 10 8 3 0 1 2 3 10 78 DAYS WITH CLOUDY (7-8)/8 2 5 8 3 1 0 0 0 0 1 0 14 34 DAYS WITH VISIBILITY =< 2 KM 3 2 0 2 0 0 0 1 0 0 1 2 11 DURATION OF SUNSHINE HOURS 237.8 197.5 253.7 272.7 ****** ****** 352.4 354.3 325.3 297.0 280.5 138.7 ****** ======================================================================================================================= 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 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 885.6 882.5 881.8 880.1 879.6 875.2 870.7 873.8 878.9 883.4 884.6 887.1 880.3 MAX. QFE PRESSURE IN HPA 890.7 888.6 889.5 886.3 885.4 882.9 875.3 878.6 884.5 890.3 891.4 892.2 892.2 DAY-HOUR 15- 6 1- 6 3- 6 11- 6 27- 3 2- 6 4- 6 25- 6 13- 6 25- 6 28- 6 11- 6 MIN. QFE PRESSURE IN HPA 877.4 873.9 871.0 874.0 871.6 869.3 865.5 868.7 874.0 877.2 874.6 881.4 865.5 DAY-HOUR 1-15 24-12 27-12 16-12 14-15 17-15 16-15 3-12 4-12 13-12 26- 9 4-12 MEAN QNH PRESSURE IN HPA 1023.7 1020.4 1019.5 1017.6 1017.0 1012.1 1007.0 1010.5 1016.3 1021.3 1022.6 1025.4 1017.8 MAX. QNH PRESSURE IN HPA 1029.5 1027.2 1028.2 1024.6 1023.6 1020.8 1012.2 1015.9 1022.6 1029.1 1030.3 1031.2 1031.2 DAY-HOUR 15- 6 1- 6 3- 6 11- 6 27- 3 2- 6 4- 6 25- 6 13- 6 25- 6 28- 6 11- 6 MIN. QNH PRESSURE IN HPA 1014.6 1010.6 1007.4 1010.7 1008.0 1005.5 1001.2 1004.8 1010.7 1014.3 1011.4 1019.1 1001.2 DAY-HOUR 1-15 24-12 27-12 16-12 14-15 17-15 16-15 3-12 4-12 13-12 26- 9 4-12 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 885.7 882.9 882.3 880.8 880.5 876.3 871.4 874.4 879.8 884.1 885.2 887.2 880.9 MAX. QFE PRESSURE IN HPA 889.2 887.2 888.0 885.4 885.4 882.3 874.6 878.2 883.7 889.6 890.0 891.1 891.1 DAY 29 1 3 11 27 2 28 25 13 25 28 11 MIN. QFE PRESSURE IN HPA 881.0 875.7 872.2 875.4 873.8 871.7 867.1 869.5 876.2 878.5 874.8 883.8 867.1 DAY 13 24 27 16 15 23 17 3 4 13 26 6 MEAN QNH PRESSURE IN HPA 1023.9 1020.8 1020.0 1018.4 1018.0 1013.4 1007.8 1011.1 1017.2 1022.2 1023.3 1025.6 1018.5 MAX. QNH PRESSURE IN HPA 1027.8 1025.6 1026.5 1023.6 1023.6 1020.1 1011.4 1015.5 1021.7 1028.3 1028.7 1030.0 1030.0 DAY 29 1 3 11 27 2 28 25 13 25 28 11 MIN. QNH PRESSURE IN HPA 1018.6 1012.7 1008.7 1012.3 1010.5 1008.2 1003.0 1005.7 1013.2 1015.8 1011.6 1021.8 1003.0 DAY 13 24 27 16 15 23 17 3 4 13 26 6 MEAN QFF PRESSURE IN HPA 1024.8 1020.3 1018.0 1012.7 1009.4 1002.6 994.9 999.7 1009.1 1016.9 1021.1 1026.4 1013.0 MAX. QFF PRESSURE IN HPA 1029.2 1024.6 1028.1 1019.8 1017.3 1011.4 999.6 1003.7 1013.0 1025.8 1031.5 1032.4 1032.4 DAY 8 20 7 1 27 2 28 25 23 27 30 11 MIN. QFF PRESSURE IN HPA 1017.0 1011.2 1002.0 1004.8 1001.5 995.7 988.7 993.2 1004.6 1006.3 1007.9 1020.3 988.7 DAY 13 24 27 16 15 18 17 3 1 13 26 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 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 887.3 884.2 883.5 881.7 881.1 876.6 871.9 874.9 880.5 885.1 886.3 888.5 881.8 MAX. QFE PRESSURE IN HPA 890.7 888.6 889.5 886.3 885.4 882.9 875.3 878.6 884.5 890.3 891.4 892.2 892.2 DAY 15 1 3 11 27 2 4 25 13 25 28 11 MIN. QFE PRESSURE IN HPA 882.7 876.7 872.7 875.7 874.6 871.8 867.3 870.0 876.7 879.7 875.7 884.3 867.3 DAY 1 24 27 16 15 23 17 3 4 13 26 6 MEAN QNH PRESSURE IN HPA 1025.7 1022.2 1021.4 1019.4 1018.7 1013.7 1008.4 1011.8 1018.0 1023.2 1024.5 1027.1 1019.5 MAX. QNH PRESSURE IN HPA 1029.5 1027.2 1028.2 1024.6 1023.6 1020.8 1012.2 1015.9 1022.6 1029.1 1030.3 1031.2 1031.2 DAY 15 1 3 11 27 2 4 25 13 25 28 11 MIN. QNH PRESSURE IN HPA 1020.5 1013.8 1009.3 1012.7 1011.4 1008.3 1003.2 1006.2 1013.8 1017.2 1012.7 1022.3 1003.2 DAY 1 24 27 16 15 23 17 3 4 13 26 6 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 885.4 882.6 882.1 880.4 879.8 875.5 870.9 874.0 879.0 883.2 884.2 886.8 880.3 MAX. QFE PRESSURE IN HPA 889.2 886.5 887.8 884.9 884.6 881.4 874.2 877.1 882.9 888.7 889.0 890.5 890.5 DAY 15 1 2 10 26 1 28 25 13 25 30 11 MIN. QFE PRESSURE IN HPA 879.3 874.8 871.6 874.9 873.3 870.8 866.8 869.8 875.3 878.4 874.6 882.5 866.8 DAY 1 24 27 16 15 23 17 3 4 13 26 6 MEAN QNH PRESSURE IN HPA 1023.6 1020.4 1019.8 1018.0 1017.2 1012.4 1007.3 1010.7 1016.4 1021.1 1022.2 1025.1 1017.9 MAX. QNH PRESSURE IN HPA 1027.8 1024.8 1026.3 1023.0 1022.7 1019.1 1011.0 1014.2 1020.8 1027.3 1027.6 1029.3 1029.3 DAY 15 1 2 10 26 1 28 25 13 25 30 11 MIN. QNH PRESSURE IN HPA 1016.7 1011.6 1008.0 1011.8 1010.0 1007.1 1002.6 1006.0 1012.2 1015.7 1011.4 1020.3 1002.6 DAY 1 24 27 16 15 23 17 3 4 13 26 6 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 884.4 881.2 880.3 878.6 878.3 873.9 869.6 872.6 877.4 882.0 883.1 885.8 878.9 MAX. QFE PRESSURE IN HPA 887.9 885.1 886.2 883.3 883.7 880.4 873.0 875.3 880.7 887.4 888.2 890.2 890.2 DAY 15 1 2 10 26 1 28 10 13 25 30 11 MIN. QFE PRESSURE IN HPA 877.9 873.9 871.0 874.0 871.8 869.9 865.7 868.7 874.0 877.2 876.1 881.4 865.7 DAY 1 24 27 16 14 18 16 3 4 13 26 4 MEAN QNH PRESSURE IN HPA 1022.4 1018.8 1017.8 1015.9 1015.5 1010.6 1005.8 1009.2 1014.6 1019.7 1021.0 1024.1 1016.3 MAX. QNH PRESSURE IN HPA 1026.4 1023.2 1024.5 1021.2 1021.7 1017.9 1009.6 1012.2 1018.3 1025.8 1026.7 1029.0 1029.0 DAY 15 1 2 10 26 1 28 10 13 25 30 11 MIN. QNH PRESSURE IN HPA 1015.1 1010.6 1007.4 1010.7 1008.3 1006.1 1001.4 1004.8 1010.7 1014.3 1013.1 1019.1 1001.4 DAY 1 24 27 16 14 18 16 3 4 13 26 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 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 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 885.1 881.9 880.9 879.0 878.2 873.9 869.7 873.0 877.9 882.8 884.2 886.9 879.5 MAX. QFE PRESSURE IN HPA 888.6 885.9 886.4 883.4 884.6 880.2 873.3 875.8 880.9 888.6 889.2 891.0 891.0 DAY 7 1 2 10 26 1 28 24 13 26 30 11 MIN. QFE PRESSURE IN HPA 877.4 876.5 872.8 874.5 871.6 869.3 865.5 869.0 874.0 877.8 878.9 882.0 865.5 DAY 1 9 27 16 14 17 16 3 4 13 26 4 MEAN QNH PRESSURE IN HPA 1023.2 1019.7 1018.5 1016.3 1015.5 1010.6 1005.9 1009.6 1015.1 1020.6 1022.2 1025.2 1016.9 MAX. QNH PRESSURE IN HPA 1027.2 1024.1 1024.7 1021.3 1022.7 1017.7 1010.0 1012.8 1018.5 1027.2 1027.8 1029.9 1029.9 DAY 7 1 2 10 26 1 28 24 13 26 30 11 MIN. QNH PRESSURE IN HPA 1014.6 1013.6 1009.4 1011.3 1008.0 1005.5 1001.2 1005.1 1010.7 1015.0 1016.3 1019.7 1001.2 DAY 1 9 27 16 14 17 16 3 4 13 26 4 MEAN QFF PRESSURE IN HPA 1024.0 1019.3 1016.3 1010.6 1006.8 999.7 993.0 998.1 1006.9 1015.4 1020.1 1025.9 1011.3 MAX. QFF PRESSURE IN HPA 1029.3 1023.7 1027.2 1016.8 1015.8 1009.2 997.8 1001.5 1010.5 1024.3 1031.1 1032.5 1032.5 DAY 7 20 6 10 26 1 28 24 28 26 30 11 MIN. QFF PRESSURE IN HPA 1014.9 1009.7 1003.9 1005.1 998.0 993.4 986.5 992.5 1001.8 1005.3 1012.7 1019.6 986.5 DAY 1 9 27 15 14 17 16 3 4 13 5 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 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 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.2 9.6 12.2 19.8 26.6 32.7 32.3 31.7 30.5 22.1 13.7 10.1 20.4 MINIMUN AIR TEMPERATURE (C) -1.0 3.7 8.3 12.5 16.8 23.5 25.6 22.5 19.2 10.7 3.9 -0.1 12.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 3 23 31 18 8 0 0 0 85 DAYS WITH MINIMUM TEMP. <=-4 8 0 0 0 0 0 0 0 0 0 0 4 12 DAYS WITH FREEZING MIN.<= 0 17 6 0 0 0 0 0 0 0 0 5 16 44 TEMPERATURE RECORDS LOWEST(C) -12.4 -1.6 2.2 1.6 10.6 18.8 22.2 13.6 12.6 4.0 -2.4 -5.2 -12.4 DAY 15 25 18 7 3 17 8 31 1 22 14 7 MAXIMUM AIR TEMPERATURE (C) 9.0 15.9 16.3 26.6 31.7 37.2 36.1 36.2 36.1 28.4 19.9 16.9 25.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 8 20 30 31 31 30 9 0 0 159 DAYS WITH MAXIMUM TEMP. <= 0 3 0 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 18.0 21.2 24.8 34.2 38.0 41.6 39.4 39.4 41.2 33.5 27.2 22.6 41.6 DAY 7 11 26 25 31 7 8 28 10 1 1 28 DIF. BETWEEN (MAX.-MIN.) (C) 10.0 12.2 8.0 14.1 14.9 13.7 10.5 13.7 16.9 17.7 16.0 17.0 13.7 MEAN DAILY TEMP. (MDT) (C) 4.0 9.8 12.3 19.5 24.2 30.4 30.8 29.4 27.6 19.5 11.9 8.4 19.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 30.5 103.0 280.9 305.2 258.9 198.8 15.1 0.0 0.0 1192.5 HEATING DEG. DAYS(BASE 18 0C) 433.3 237.4 177.4 31.9 0.0 0.0 0.0 0.0 0.0 16.2 184.3 298.2 1378.6 DEWPOINT (MEAN C) -3.0 0.2 6.3 1.7 3.7 7.8 3.7 2.2 3.9 -1.6 -3.5 -5.8 1.3 MIXING RATIO (G/KG) 3.72 4.56 7.09 5.20 6.01 8.23 5.84 5.24 5.92 4.19 3.51 3.01 5.21 VAPOUR PRESSURE (HPA) 5.26 6.41 9.91 7.29 8.41 11.41 8.13 7.30 8.27 5.91 4.98 4.27 7.30 SATURATION DEF. (HPA) 3.02 6.11 4.88 17.71 27.90 39.60 41.05 40.74 37.54 22.29 11.89 9.02 21.81 RELATIVE HUMIDITY (MEAN %) 68 57 72 34 25 23 17 16 19 22 32 34 35 RELATIVE HUMIDITY (MAX. %) 91 86 90 55 40 34 22 21 27 31 45 47 49 RELATIVE HUMIDITY (MIN. %) 44 34 58 21 17 17 14 13 15 16 24 25 25 RELATIVE HUMIDITY (MEAN% 03UTC) 86 83 89 52 41 33 22 21 27 31 42 43 48 RELATIVE HUMIDITY (MEAN% 09UTC) 56 39 64 26 20 20 15 15 18 20 27 29 29 RELATIVE HUMIDITY (MEAN% 15UTC) 61 43 69 27 22 21 16 14 17 19 31 30 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 37.7 40.0 137.1 6.7 4.3 0.0 0.0 0.0 0.0 2.0 0.0 0.2 228.0 DAYS WITH PRECIPITATION >=10 1 1 5 0 0 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION >= 5 3 3 7 1 0 0 0 0 0 0 0 0 14 DAYS WITH PRECIPITATION >= 1 8 7 14 1 1 0 0 0 0 1 0 0 32 DAYS WITH PRECIPITATION 9 9 14 3 6 0 0 0 0 1 0 1 43 GREATEST DAILY PRECIPITATION 15.0 18.0 29.0 6.1 3.0 0.0 0.0 0.0 0.0 2.0 0.0 0.2 29.0 DAY 12 13 1 17 22 ** ** ** ** 18 ** 16 DAY WITH THUNDER STORM 1 1 2 0 2 0 0 0 0 0 0 0 6 DAYS WITH SNOW OR SLEET 6 1 0 0 0 0 0 0 0 0 0 0 7 DAYS WITH DUST 0 3 1 1 0 0 5 7 0 0 0 0 17 WIND DIRECTION (PREVAILING) 135 135 135 135 90 360 360 360 360 180 180 180 360 PREVAILING WIND SPEED(KNOTS) 5.9 7.8 6.9 9.0 8.2 12.5 13.9 12.1 10.4 7.6 4.8 5.2 12.3 PREVAILING WIND PERCENT 14.7 16.5 15.2 14.6 15.1 39.6 66.9 51.7 29.9 10.8 12.6 10.0 16.5 CALMS PERCENT OF WIND 66.8 49.0 51.3 36.6 37.7 20.8 6.5 20.5 38.9 55.4 81.8 72.3 45.3 NO. OF WIND OBSERVATION 217 194 197 164 146 144 154 151 144 139 143 130 1923 VECTOR WIND DIRECTION (MEAN) 108 136 172 148 86 12 10 7 22 330 165 184 22 VECTOR WIND MAGNITUDE(KNOTS) 1.0 0.9 1.0 0.9 2.2 5.3 11.7 7.5 3.4 0.4 0.5 0.8 2.1 WIND STEADINESES (MEAN %) 50.0 25.0 29.4 19.1 44.0 63.9 90.7 84.3 63.0 10.8 50.0 50.0 42.0 WIND SPEED (MEAN KNOTS) 2.0 3.6 3.4 4.7 5.0 8.3 12.9 8.9 5.4 3.7 1.0 1.6 5.0 FASTEST WIND DIRECTION 60 150 300 10 240 360 360 340 360 30 350 350 360 FASTEST WIND SPEED (KNOTS) 16 16 19 16 16 29 29 27 21 19 12 16 29 DAY 10 4 27 4 13 15 26 2 14 2 19 2 DAYS WITH SKY CLEAR (0-2)/8 13 13 3 13 16 25 31 31 30 30 20 24 249 DAYS WITH P.CLOUDY (3-6)/8 11 10 12 9 12 5 0 0 0 1 8 6 74 DAYS WITH CLOUDY (7-8)/8 7 6 16 8 3 0 0 0 0 0 2 1 43 DAYS WITH VISIBILITY =< 2 KM 5 2 3 0 0 0 0 0 1 0 0 0 11 DURATION OF SUNSHINE HOURS 178.0 214.8 168.3 268.9 310.5 341.3 379.8 364.7 326.2 310.8 261.6 269.3 3394.2 ======================================================================================================================= 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 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 885.6 881.9 880.2 880.8 879.8 875.2 874.2 875.4 877.4 883.3 887.0 887.2 880.7 MAX. QFE PRESSURE IN HPA 891.9 888.0 886.2 887.8 885.7 880.6 880.7 880.7 885.6 889.8 896.3 894.6 896.3 DAY-HOUR 28- 6 18- 6 22- 6 7- 6 4- 6 1- 3 4- 3 30- 6 25- 6 20- 6 15- 6 8- 6 MIN. QFE PRESSURE IN HPA 879.5 872.5 871.1 873.1 873.5 871.2 870.2 870.1 871.2 876.9 879.9 878.1 870.1 DAY-HOUR 13-12 5-12 14-12 11- 0 29-12 19-12 12-12 8-12 20-12 6-12 10-12 15-12 MEAN QNH PRESSURE IN HPA 1023.7 1019.7 1017.8 1018.4 1017.3 1012.1 1010.9 1012.3 1014.5 1021.2 1025.4 1025.6 1018.2 MAX. QNH PRESSURE IN HPA 1030.9 1026.5 1024.5 1026.3 1023.9 1018.2 1018.3 1018.3 1023.8 1028.5 1035.8 1033.9 1035.8 DAY-HOUR 28- 6 18- 6 22- 6 7- 6 4- 6 1- 3 4- 3 30- 6 25- 6 20- 6 15- 6 8- 6 MIN. QNH PRESSURE IN HPA 1016.9 1009.1 1007.5 1009.7 1010.2 1007.6 1006.5 1006.4 1007.6 1014.0 1017.4 1015.4 1006.4 DAY-HOUR 13-12 5-12 14-12 11- 0 29-12 19-12 12-12 8-12 20-12 6-12 10-12 15-12 MEAN QFF PRESSURE IN HPA 1026.4 1018.5 1014.6 1013.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1035.1 1026.9 1022.4 1024.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 16- 6 14- 6 22- 3 7- 6 **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1017.7 1007.5 1002.9 1002.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 19-12 5-12 14-12 11- 0 **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 884.9 881.7 879.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 889.3 885.5 883.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 28 9 31 ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 880.1 875.5 874.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 13 6 27 ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1023.1 1019.4 1016.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1028.0 1023.7 1021.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 28 9 31 ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1017.6 1012.4 1011.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 13 6 27 ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1025.5 1017.7 1013.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1030.9 1024.7 1019.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 17 24 12 ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1017.8 1010.1 1003.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 20 6 27 ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 885.7 882.3 880.5 881.3 880.8 876.3 874.9 876.0 878.3 884.0 887.5 887.6 881.3 MAX. QFE PRESSURE IN HPA 890.3 886.2 885.0 886.9 884.2 880.6 880.7 880.2 884.8 889.2 895.4 893.8 895.4 DAY 28 18 22 8 4 1 4 30 25 20 19 8 MIN. QFE PRESSURE IN HPA 880.4 876.2 875.8 874.8 876.0 873.2 871.1 871.5 873.4 879.3 882.0 882.6 871.1 DAY 20 6 14 11 30 23 25 13 20 7 29 25 MEAN QNH PRESSURE IN HPA 1023.9 1020.1 1018.0 1018.9 1018.4 1013.3 1011.7 1013.0 1015.6 1022.0 1025.9 1026.1 1018.9 MAX. QNH PRESSURE IN HPA 1029.1 1024.5 1023.1 1025.3 1022.2 1018.2 1018.3 1017.7 1022.9 1027.8 1034.8 1033.0 1034.8 DAY 28 18 22 8 4 1 4 30 25 20 19 8 MIN. QNH PRESSURE IN HPA 1017.9 1013.2 1012.8 1011.6 1013.0 1009.8 1007.5 1007.9 1010.1 1016.7 1019.7 1020.4 1007.5 DAY 20 6 14 11 30 23 25 13 20 7 29 25 MEAN QFF PRESSURE IN HPA 1026.5 1019.5 1015.6 1013.1 1010.2 1001.8 1000.3 1002.5 1006.0 1017.1 1025.0 1027.2 1013.7 MAX. QFF PRESSURE IN HPA 1033.0 1025.7 1022.4 1023.6 1015.9 1007.5 1007.7 1009.7 1014.3 1026.0 1037.7 1036.0 1037.7 DAY 28 24 22 7 3 1 4 31 25 20 19 8 MIN. QFF PRESSURE IN HPA 1018.5 1012.2 1006.7 1004.9 1003.0 997.8 995.8 995.8 1000.5 1010.9 1017.2 1020.3 995.8 DAY 7 22 27 11 30 6 25 13 20 15 29 25 ======================================================================================================================= 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 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 887.2 883.6 881.8 882.2 881.3 876.5 875.3 876.6 878.8 885.0 888.6 888.9 882.1 MAX. QFE PRESSURE IN HPA 891.9 888.0 886.2 887.8 885.7 880.2 880.1 880.7 885.6 889.8 896.3 894.6 896.3 DAY 28 18 22 7 4 1 4 30 25 20 15 8 MIN. QFE PRESSURE IN HPA 882.1 877.6 876.0 876.0 877.1 873.5 872.1 872.8 874.2 880.2 882.8 883.3 872.1 DAY 13 22 14 11 29 6 25 13 20 6 10 15 MEAN QNH PRESSURE IN HPA 1025.6 1021.6 1019.5 1020.0 1018.9 1013.6 1012.3 1013.7 1016.1 1023.1 1027.2 1027.5 1019.9 MAX. QNH PRESSURE IN HPA 1030.9 1026.5 1024.5 1026.3 1023.9 1017.7 1017.6 1018.3 1023.8 1028.5 1035.8 1033.9 1035.8 DAY 28 18 22 7 4 1 4 30 25 20 15 8 MIN. QNH PRESSURE IN HPA 1019.9 1014.8 1013.0 1013.0 1014.2 1010.2 1008.6 1009.4 1011.0 1017.7 1020.6 1021.2 1008.6 DAY 13 22 14 11 29 6 25 13 20 6 10 15 MEAN QFF PRESSURE IN HPA 1028.8 1020.5 1016.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1035.1 1026.9 1022.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 14 12 ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1021.0 1012.4 1008.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 20 22 27 ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 885.6 881.9 880.7 881.0 880.0 875.4 874.4 875.5 877.4 883.1 886.7 886.9 880.7 MAX. QFE PRESSURE IN HPA 890.5 886.5 885.0 886.9 884.3 878.6 878.9 879.3 883.7 888.2 894.7 892.3 894.7 DAY 28 18 12 7 4 1 3 30 25 20 15 7 MIN. QFE PRESSURE IN HPA 880.6 874.4 874.1 875.6 875.5 872.2 871.9 871.9 872.8 878.5 880.8 880.1 871.9 DAY 13 5 14 11 29 6 25 8 19 6 10 15 MEAN QNH PRESSURE IN HPA 1023.7 1019.6 1018.3 1018.6 1017.5 1012.3 1011.2 1012.5 1014.6 1021.0 1025.0 1025.2 1018.3 MAX. QNH PRESSURE IN HPA 1029.3 1024.8 1023.1 1025.3 1022.3 1015.9 1016.3 1016.7 1021.7 1026.7 1034.0 1031.3 1034.0 DAY 28 18 12 7 4 1 3 30 25 20 15 7 MIN. QNH PRESSURE IN HPA 1018.2 1011.2 1010.9 1012.5 1012.4 1008.7 1008.4 1008.4 1009.4 1015.8 1018.4 1017.6 1008.4 DAY 13 5 14 11 29 6 25 8 19 6 10 15 MEAN QFF PRESSURE IN HPA 1026.3 1017.9 1014.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.1 1024.2 1020.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 14 12 ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1019.5 1009.6 1007.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 20 5 14 ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 884.5 880.5 879.4 879.3 878.4 874.0 873.1 874.3 876.0 881.9 885.7 885.9 879.4 MAX. QFE PRESSURE IN HPA 889.2 885.3 883.6 885.5 882.7 876.8 878.6 878.2 882.0 887.0 893.8 891.8 893.8 DAY 28 18 22 7 4 1 3 30 25 20 15 7 MIN. QFE PRESSURE IN HPA 879.5 872.5 871.1 873.4 873.5 871.2 870.2 870.1 871.2 876.9 879.9 878.1 870.1 DAY 13 5 14 10 29 19 12 8 20 6 10 15 MEAN QNH PRESSURE IN HPA 1022.6 1018.0 1016.8 1016.7 1015.7 1010.7 1009.7 1011.1 1012.9 1019.7 1023.9 1024.2 1016.8 MAX. QNH PRESSURE IN HPA 1027.8 1023.5 1021.5 1023.7 1020.5 1013.9 1015.9 1015.5 1019.7 1025.4 1033.0 1030.8 1033.0 DAY 28 18 22 7 4 1 3 30 25 20 15 7 MIN. QNH PRESSURE IN HPA 1016.9 1009.1 1007.5 1010.1 1010.2 1007.6 1006.5 1006.4 1007.6 1014.0 1017.4 1015.4 1006.4 DAY 13 5 14 10 29 19 12 8 20 6 10 15 MEAN QFF PRESSURE IN HPA 1024.9 1016.5 1013.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1030.6 1022.0 1019.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 24 12 ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1017.7 1007.5 1002.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 19 5 14 ** ** ** ** ** ** ** ** ** ======================================================================================================================= 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 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 885.4 881.3 879.9 879.6 878.6 874.0 873.2 874.6 876.5 882.6 886.6 886.8 879.9 MAX. QFE PRESSURE IN HPA 889.9 885.6 884.0 885.7 882.5 876.4 879.5 879.0 882.3 887.5 895.0 893.0 895.0 DAY 28 18 12 7 4 3 3 29 25 19 15 7 MIN. QFE PRESSURE IN HPA 880.5 873.6 872.7 874.1 873.8 871.3 870.5 870.3 871.5 877.7 881.1 879.0 870.3 DAY 13 5 14 10 29 6 12 8 19 6 10 15 MEAN QNH PRESSURE IN HPA 1023.5 1019.0 1017.4 1017.1 1015.9 1010.8 1009.8 1011.4 1013.5 1020.4 1024.9 1025.2 1017.4 MAX. QNH PRESSURE IN HPA 1028.6 1023.8 1022.0 1023.9 1020.3 1013.4 1016.9 1016.4 1020.1 1025.9 1034.4 1032.1 1034.4 DAY 28 18 12 7 4 3 3 29 25 19 15 7 MIN. QNH PRESSURE IN HPA 1018.1 1010.3 1009.3 1010.9 1010.5 1007.7 1006.8 1006.6 1007.9 1014.9 1018.7 1016.4 1006.6 DAY 13 5 14 10 29 6 12 8 19 6 10 15 MEAN QFF PRESSURE IN HPA 1026.1 1018.6 1014.9 1011.2 1007.7 999.2 998.4 1000.8 1003.9 1015.7 1023.9 1026.2 1012.2 MAX. QFF PRESSURE IN HPA 1032.9 1023.8 1020.4 1022.2 1014.3 1002.3 1005.4 1008.1 1011.6 1023.4 1036.3 1036.1 1036.3 DAY 16 23 1 7 3 17 3 31 25 19 15 7 MIN. QFF PRESSURE IN HPA 1019.9 1009.0 1007.0 1003.8 1000.9 995.2 994.5 995.5 997.9 1009.5 1015.5 1016.9 994.5 DAY 7 5 26 25 19 6 12 8 19 6 10 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 885.9 882.4 880.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 890.8 886.8 884.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 28 18 12 ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 880.7 875.1 874.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 13 5 14 ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1024.1 1020.2 1017.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.6 1025.1 1022.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 28 18 12 ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1018.3 1012.0 1011.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 13 5 14 ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1027.2 1019.0 1014.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.3 1025.9 1019.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 23 12 ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1020.1 1011.0 1006.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 20 5 26 ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 885.4 882.1 879.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 890.1 886.0 883.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 27 18 30 ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 880.0 875.5 875.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 13 5 26 ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1023.5 1019.9 1017.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1028.9 1024.2 1021.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 27 18 30 ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1017.5 1012.4 1011.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 13 5 26 ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1026.0 1018.0 1013.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1031.6 1025.3 1018.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 23 11 ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1019.3 1010.6 1004.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 19 5 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 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.8 10.3 14.1 20.4 26.4 32.4 35.4 32.9 28.9 22.7 13.7 9.2 21.3 MINIMUN AIR TEMPERATURE (C) 0.4 1.7 7.3 11.9 16.9 23.4 27.0 23.5 17.1 12.9 6.4 2.6 12.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 5 28 31 21 3 0 0 0 88 DAYS WITH MINIMUM TEMP. <=-4 1 5 0 0 0 0 0 0 0 0 0 1 7 DAYS WITH FREEZING MIN.<= 0 18 16 1 0 0 0 0 0 0 0 2 7 44 TEMPERATURE RECORDS LOWEST(C) -4.4 -5.4 -0.4 5.4 11.0 19.0 22.4 16.4 13.4 8.2 -1.0 -4.0 -5.4 DAY 27 10 2 14 7 5 12 30 17 28 26 29 MAXIMUM AIR TEMPERATURE (C) 14.1 15.7 18.5 25.1 30.8 37.0 39.9 37.9 35.0 28.3 18.7 13.8 26.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 20 30 31 31 30 12 0 0 156 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.2 25.4 24.2 30.0 35.6 41.6 43.4 42.2 39.2 35.4 26.6 18.2 43.4 DAY 11 23 24 10 24 16 18 10 4 1 5 8 DIF. BETWEEN (MAX.-MIN.) (C) 13.7 14.0 11.2 13.2 13.9 13.6 12.9 14.4 17.9 15.4 12.3 11.2 13.6 MEAN DAILY TEMP. (MDT) (C) 7.3 8.7 12.9 18.5 23.9 30.2 33.4 30.7 26.1 20.6 12.5 8.2 19.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.4 0.0 5.1 98.6 276.6 385.6 301.4 151.6 41.9 0.0 0.0 1261.2 HEATING DEG. DAYS(BASE 18 0C) 332.2 263.1 159.0 24.5 0.0 0.0 0.0 0.0 0.0 12.7 166.3 304.2 1262.0 DEWPOINT (MEAN C) -5.2 -8.7 0.2 5.2 6.8 8.4 8.3 -2.4 -2.1 0.5 0.0 0.4 0.9 MIXING RATIO (G/KG) 3.05 2.52 4.78 6.77 7.24 8.13 8.29 3.84 3.79 4.61 4.63 4.60 5.19 VAPOUR PRESSURE (HPA) 4.31 3.56 6.69 9.45 10.12 11.28 11.45 5.37 5.33 6.50 6.54 6.49 7.26 SATURATION DEF. (HPA) 7.67 10.08 9.98 15.35 25.69 38.67 47.11 46.44 36.65 22.97 10.02 5.59 23.02 RELATIVE HUMIDITY (MEAN %) 40 29 44 42 31 24 20 11 14 26 44 58 32 RELATIVE HUMIDITY (MAX. %) 58 51 72 67 45 32 25 15 19 38 68 85 48 RELATIVE HUMIDITY (MIN. %) 29 17 30 28 23 19 17 8 11 18 29 40 22 RELATIVE HUMIDITY (MEAN% 03UTC) 56 51 68 66 45 32 25 15 19 37 67 84 47 RELATIVE HUMIDITY (MEAN% 09UTC) 32 22 34 33 25 21 19 9 12 21 32 46 26 RELATIVE HUMIDITY (MEAN% 15UTC) 36 20 41 35 26 21 19 10 12 24 39 54 28 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 33.6 13.3 85.1 21.6 5.0 2.2 0.0 0.0 0.0 5.1 9.7 9.9 185.5 DAYS WITH PRECIPITATION >=10 2 1 2 0 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 2 1 5 3 0 0 0 0 0 0 1 1 13 DAYS WITH PRECIPITATION >= 1 2 1 10 4 2 1 0 0 0 2 3 3 28 DAYS WITH PRECIPITATION 4 3 11 7 2 2 0 0 0 4 7 7 47 GREATEST DAILY PRECIPITATION 22.0 13.0 37.0 6.0 3.0 2.0 0.0 0.0 0.0 3.0 5.0 5.1 37.0 DAY 18 28 17 24 3 6 ** ** ** 24 21 11 DAY WITH THUNDER STORM 0 0 0 0 1 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 2 4 2 1 2 2 2 3 1 0 0 0 19 WIND DIRECTION (PREVAILING) 135 225 135 270 360 360 360 360 45 135 135 135 360 PREVAILING WIND SPEED(KNOTS) 6.7 8.7 7.3 10.8 10.2 12.9 14.0 14.5 8.5 7.9 7.5 7.2 13.0 PREVAILING WIND PERCENT 7.7 10.0 16.8 16.0 16.1 24.0 40.6 34.8 16.0 16.8 19.3 13.5 11.1 CALMS PERCENT OF WIND 71.6 60.0 43.9 43.3 36.8 31.3 16.1 25.2 38.7 49.7 59.3 63.2 44.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 225 245 213 261 23 15 17 17 63 180 147 137 20 VECTOR WIND MAGNITUDE(KNOTS) 0.6 1.5 1.9 1.3 2.5 4.6 9.2 7.6 2.3 1.1 1.4 0.9 1.6 WIND STEADINESES (MEAN %) 31.6 42.9 39.6 26.5 44.6 65.7 86.8 82.6 45.1 28.9 46.7 33.3 30.8 WIND SPEED (MEAN KNOTS) 1.9 3.5 4.8 4.9 5.6 7.0 10.6 9.2 5.1 3.8 3.0 2.7 5.2 FASTEST WIND DIRECTION 130 230 220 250 360 340 360 360 340 360 250 30 360 FASTEST WIND SPEED (KNOTS) 14 25 17 21 21 23 29 25 21 27 14 17 29 DAY 17 23 8 11 30 21 9 25 19 30 14 5 DAYS WITH SKY CLEAR (0-2)/8 17 16 13 11 15 23 29 30 30 17 14 16 231 DAYS WITH P.CLOUDY (3-6)/8 9 9 12 15 15 6 2 1 0 11 14 13 107 DAYS WITH CLOUDY (7-8)/8 5 3 6 4 1 1 0 0 0 3 2 2 27 DAYS WITH VISIBILITY =< 2 KM 1 0 0 0 0 0 0 1 0 1 0 0 3 DURATION OF SUNSHINE HOURS 227.1 224.1 235.6 255.8 262.1 320.1 377.1 370.7 326.0 252.2 209.7 212.9 3273.4 ======================================================================================================================= 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 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 883.6 882.7 879.6 879.7 880.1 875.3 871.7 874.7 880.0 883.8 885.7 884.9 880.1 MAX. QFE PRESSURE IN HPA 890.9 889.7 890.9 885.3 887.3 881.3 875.1 878.9 886.0 888.2 892.4 894.0 894.0 DAY-HOUR 19- 6 8- 6 11- 6 24- 3 12- 6 9- 6 22- 6 31- 6 18- 6 31- 6 8- 6 29- 6 MIN. QFE PRESSURE IN HPA 872.7 873.9 871.6 870.7 872.4 869.1 867.6 870.6 873.4 879.5 880.7 877.3 867.6 DAY-HOUR 17-15 1- 3 30-12 11-15 5-15 24-12 16-15 13-12 2-12 1-12 13-12 10-12 MEAN QNH PRESSURE IN HPA 1021.6 1020.5 1017.0 1017.1 1017.6 1012.2 1008.2 1011.5 1017.4 1021.7 1023.9 1023.0 1017.6 MAX. QNH PRESSURE IN HPA 1029.8 1028.4 1029.8 1023.5 1025.7 1019.0 1012.0 1016.3 1024.2 1026.7 1031.4 1033.2 1033.2 DAY-HOUR 19- 6 8- 6 11- 6 24- 3 12- 6 9- 6 22- 6 31- 6 18- 6 31- 6 8- 6 29- 6 MIN. QNH PRESSURE IN HPA 1009.3 1010.6 1008.0 1007.0 1008.9 1005.2 1003.5 1006.9 1010.1 1016.9 1018.3 1014.5 1003.5 DAY-HOUR 17-15 1- 3 30-12 11-15 5-15 24-12 16-15 13-12 2-12 1-12 13-12 10-12 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 884.0 883.0 880.1 880.4 881.1 876.4 872.4 875.5 881.0 884.7 886.2 885.2 880.8 MAX. QFE PRESSURE IN HPA 889.4 889.0 889.1 885.3 886.1 881.0 874.6 878.2 885.6 887.4 891.5 892.6 892.6 DAY 8 8 11 24 7 8 9 31 18 30 8 29 MIN. QFE PRESSURE IN HPA 874.0 873.9 873.7 874.8 875.8 871.0 869.4 872.9 876.3 881.1 881.9 877.7 869.4 DAY 18 1 30 11 5 30 11 4 2 1 13 11 MEAN QNH PRESSURE IN HPA 1022.0 1020.9 1017.6 1018.0 1018.7 1013.4 1008.9 1012.4 1018.6 1022.8 1024.5 1023.3 1018.4 MAX. QNH PRESSURE IN HPA 1028.1 1027.6 1027.7 1023.5 1024.4 1018.6 1011.4 1015.5 1023.8 1025.8 1030.4 1031.7 1031.7 DAY 8 8 11 24 7 8 9 31 18 30 8 29 MIN. QNH PRESSURE IN HPA 1010.7 1010.6 1010.4 1011.6 1012.8 1007.4 1005.6 1009.5 1013.3 1018.7 1019.6 1014.9 1005.6 DAY 18 1 30 11 5 30 11 4 2 1 13 11 MEAN QFF PRESSURE IN HPA 1022.9 1021.1 1015.2 1012.5 1010.4 1002.1 996.4 1001.5 1010.2 1016.9 1022.7 1023.8 1013.0 MAX. QFF PRESSURE IN HPA 1029.7 1031.3 1026.2 1020.6 1019.2 1008.7 999.1 1006.4 1016.6 1022.1 1030.6 1035.6 1035.6 DAY 24 8 1 14 7 4 9 31 18 31 30 29 MIN. QFF PRESSURE IN HPA 1010.1 1008.8 1005.3 1003.2 1003.2 995.6 993.3 997.5 1003.2 1010.5 1016.3 1013.1 993.3 DAY 17 1 30 11 5 24 16 1 3 1 13 11 ======================================================================================================================= 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 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 885.3 884.2 881.3 881.3 881.5 876.6 872.9 875.9 881.5 885.4 887.3 886.5 881.7 MAX. QFE PRESSURE IN HPA 890.9 889.7 890.9 885.3 887.3 881.3 875.1 878.9 886.0 888.2 892.4 894.0 894.0 DAY 19 8 11 24 12 9 22 31 18 31 8 29 MIN. QFE PRESSURE IN HPA 876.9 875.3 874.4 875.6 876.1 871.3 869.7 873.0 876.5 882.0 883.0 879.0 869.7 DAY 26 1 30 11 5 30 11 5 2 1 13 11 MEAN QNH PRESSURE IN HPA 1023.5 1022.3 1019.0 1018.9 1019.2 1013.7 1009.5 1012.9 1019.2 1023.6 1025.7 1024.8 1019.3 MAX. QNH PRESSURE IN HPA 1029.8 1028.4 1029.8 1023.5 1025.7 1019.0 1012.0 1016.3 1024.2 1026.7 1031.4 1033.2 1033.2 DAY 19 8 11 24 12 9 22 31 18 31 8 29 MIN. QNH PRESSURE IN HPA 1014.0 1012.2 1011.2 1012.5 1013.1 1007.7 1005.9 1009.6 1013.6 1019.7 1020.9 1016.4 1005.9 DAY 26 1 30 11 5 30 11 5 2 1 13 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 883.4 882.6 879.8 879.9 880.3 875.4 872.0 874.9 880.1 883.5 885.4 884.4 880.1 MAX. QFE PRESSURE IN HPA 889.9 887.2 889.4 884.6 885.8 879.8 874.5 877.9 884.8 887.1 890.6 891.0 891.0 DAY 19 8 11 23 12 8 22 31 18 9 8 29 MIN. QFE PRESSURE IN HPA 873.8 876.8 872.5 873.1 874.5 870.5 869.0 871.7 874.9 880.4 881.0 878.4 869.0 DAY 17 1 30 11 5 30 16 13 2 1 13 11 MEAN QNH PRESSURE IN HPA 1021.3 1020.4 1017.3 1017.3 1017.8 1012.4 1008.5 1011.7 1017.6 1021.5 1023.5 1022.5 1017.6 MAX. QNH PRESSURE IN HPA 1028.6 1025.6 1028.1 1022.7 1024.0 1017.3 1011.3 1015.1 1022.9 1025.5 1029.4 1029.9 1029.9 DAY 19 8 11 23 12 8 22 31 18 9 8 29 MIN. QNH PRESSURE IN HPA 1010.5 1013.9 1009.1 1009.7 1011.3 1006.8 1005.1 1008.2 1011.8 1017.9 1018.6 1015.7 1005.1 DAY 17 1 30 11 5 30 16 13 2 1 13 11 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 882.3 881.4 878.0 878.3 878.7 874.1 870.7 873.5 878.3 882.2 884.5 883.6 878.8 MAX. QFE PRESSURE IN HPA 888.7 884.8 887.3 883.0 884.1 878.5 873.0 876.7 882.8 885.3 889.3 889.6 889.6 DAY 19 8 11 23 12 8 22 28 18 9 8 29 MIN. QFE PRESSURE IN HPA 873.3 876.2 871.6 870.9 872.6 869.1 867.7 870.6 873.4 879.5 880.7 877.3 867.7 DAY 17 27 30 11 5 24 16 13 2 1 13 10 MEAN QNH PRESSURE IN HPA 1020.1 1019.1 1015.2 1015.6 1016.0 1010.8 1007.0 1010.1 1015.6 1020.0 1022.5 1021.5 1016.1 MAX. QNH PRESSURE IN HPA 1027.3 1022.9 1025.7 1020.9 1022.1 1015.8 1009.6 1013.8 1020.6 1023.5 1028.0 1028.3 1028.3 DAY 19 8 11 23 12 8 22 28 18 9 8 29 MIN. QNH PRESSURE IN HPA 1010.0 1013.2 1008.0 1007.3 1009.2 1005.2 1003.7 1006.9 1010.1 1016.9 1018.3 1014.5 1003.7 DAY 17 27 30 11 5 24 16 13 2 1 13 10 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 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 883.1 882.2 878.7 878.6 878.9 874.0 870.8 873.7 878.9 883.0 885.4 884.7 879.3 MAX. QFE PRESSURE IN HPA 888.8 885.3 888.1 883.5 883.8 878.3 873.3 877.0 883.2 886.0 890.6 890.7 890.7 DAY 19 12 11 23 12 7 9 28 18 9 8 28 MIN. QFE PRESSURE IN HPA 872.7 876.0 872.0 870.7 872.4 869.2 867.6 870.9 873.4 880.4 881.3 878.6 867.6 DAY 17 27 17 11 5 24 16 13 2 1 13 10 MEAN QNH PRESSURE IN HPA 1021.0 1020.0 1016.1 1016.0 1016.2 1010.7 1007.1 1010.4 1016.2 1020.8 1023.6 1022.8 1016.7 MAX. QNH PRESSURE IN HPA 1027.4 1023.5 1026.6 1021.4 1021.8 1015.6 1010.0 1014.1 1021.1 1024.2 1029.4 1029.5 1029.5 DAY 19 12 11 23 12 7 9 28 18 9 8 28 MIN. QNH PRESSURE IN HPA 1009.3 1013.0 1008.5 1007.0 1008.9 1005.3 1003.5 1007.3 1010.1 1017.9 1019.0 1015.9 1003.5 DAY 17 27 17 11 5 24 16 13 2 1 13 10 MEAN QFF PRESSURE IN HPA 1021.9 1020.2 1013.6 1010.5 1007.8 999.4 994.4 999.4 1007.8 1015.0 1021.9 1023.2 1011.3 MAX. QFF PRESSURE IN HPA 1030.1 1026.1 1024.7 1017.7 1015.6 1004.8 998.4 1004.9 1013.9 1020.5 1027.9 1032.6 1032.6 DAY 19 8 1 14 7 4 9 28 18 30 29 29 MIN. QFF PRESSURE IN HPA 1007.0 1008.2 1005.5 998.8 998.5 993.2 990.5 995.9 1000.1 1009.7 1015.9 1014.6 990.5 DAY 17 23 17 11 5 24 16 13 2 1 13 10 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 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.8 10.2 16.3 24.1 28.6 31.1 34.3 33.0 28.8 23.0 17.4 14.3 22.4 MINIMUN AIR TEMPERATURE (C) 1.6 3.1 8.5 14.9 18.5 23.7 25.5 25.7 17.8 12.2 6.2 4.1 13.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 9 25 30 29 5 0 0 0 100 DAYS WITH MINIMUM TEMP. <=-4 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH FREEZING MIN.<= 0 13 6 1 0 0 0 0 0 0 0 0 2 22 TEMPERATURE RECORDS LOWEST(C) -4.2 -3.8 0.0 6.6 11.0 19.0 20.6 20.6 13.0 7.2 3.2 -0.6 -4.2 DAY 15 18 4 9 4 12 17 17 24 27 27 7 MAXIMUM AIR TEMPERATURE (C) 12.1 15.0 21.2 29.3 33.7 35.1 38.9 37.5 34.9 29.4 24.5 21.4 27.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 14 25 30 31 31 30 10 0 0 173 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.8 23.2 31.8 34.4 38.2 39.8 45.0 40.5 39.4 36.6 27.4 28.8 45.0 DAY 27 9 31 20 14 29 9 1 8 2 4 12 DIF. BETWEEN (MAX.-MIN.) (C) 10.5 11.9 12.7 14.4 15.2 11.4 13.4 11.8 17.1 17.2 18.3 17.3 14.2 MEAN DAILY TEMP. (MDT) (C) 6.9 9.1 14.9 22.1 26.1 29.4 32.2 31.6 26.3 20.8 15.3 12.7 20.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 7.5 67.9 166.7 252.5 346.7 328.4 160.3 45.8 0.0 0.0 1375.9 HEATING DEG. DAYS(BASE 18 0C) 345.6 250.8 120.7 15.1 0.0 0.0 0.0 0.0 0.0 5.3 82.2 163.1 982.8 DEWPOINT (MEAN C) -0.5 -1.2 2.9 5.0 4.6 4.0 6.0 4.5 1.5 -1.9 -3.1 -3.9 1.5 MIXING RATIO (G/KG) 4.44 4.27 5.63 6.53 6.37 5.98 6.95 6.30 5.18 3.95 3.53 3.34 5.21 VAPOUR PRESSURE (HPA) 6.25 6.01 7.89 9.13 8.91 8.35 9.65 8.78 7.25 5.57 5.00 4.74 7.29 SATURATION DEF. (HPA) 4.67 7.14 12.03 22.61 32.20 37.56 46.15 42.45 34.48 24.42 16.26 12.74 24.39 RELATIVE HUMIDITY (MEAN %) 60 49 45 31 24 19 19 18 19 21 27 31 30 RELATIVE HUMIDITY (MAX. %) 83 75 69 48 38 30 30 27 33 35 45 51 47 RELATIVE HUMIDITY (MIN. %) 45 35 31 23 17 14 13 13 12 14 17 20 21 RELATIVE HUMIDITY (MEAN% 03UTC) 81 75 69 47 38 30 30 26 33 35 45 50 47 RELATIVE HUMIDITY (MEAN% 09UTC) 49 38 35 25 20 16 14 15 14 15 18 21 23 RELATIVE HUMIDITY (MEAN% 15UTC) 59 46 42 30 22 18 17 17 17 20 28 33 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 25.1 23.2 19.4 3.5 1.7 0.0 0.0 0.0 1.1 0.0 0.0 0.0 74.0 DAYS WITH PRECIPITATION >=10 0 1 1 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 2 1 1 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 1 7 2 3 1 0 0 0 0 1 0 0 0 14 DAYS WITH PRECIPITATION 11 5 9 6 3 1 0 0 2 0 0 0 37 GREATEST DAILY PRECIPITATION 7.5 18.4 12.9 1.4 1.0 0.0 0.0 0.0 1.0 0.0 0.0 0.0 18.4 DAY 3 13 11 2 30 ** ** ** 10 ** ** ** DAY WITH THUNDER STORM 0 0 2 3 2 1 0 0 2 2 0 0 12 DAYS WITH SNOW OR SLEET 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 3 6 5 5 1 4 3 3 0 2 1 0 33 WIND DIRECTION (PREVAILING) 135 135 225 135 270 360 360 360 45 135 135 135 360 PREVAILING WIND SPEED(KNOTS) 7.7 7.5 9.3 8.4 9.6 15.0 15.1 15.3 8.6 6.8 6.8 4.4 14.5 PREVAILING WIND PERCENT 19.4 22.1 15.5 11.3 14.8 51.3 37.4 45.8 12.7 13.5 10.0 7.1 14.1 CALMS PERCENT OF WIND 58.7 47.9 51.0 44.7 35.5 14.0 16.8 21.3 53.3 64.5 75.3 87.7 47.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 162 183 222 247 18 11 18 17 74 111 159 177 21 VECTOR WIND MAGNITUDE(KNOTS) 1.1 0.9 1.8 1.1 1.1 9.9 8.5 9.3 1.9 1.3 0.5 0.5 2.1 WIND STEADINESES (MEAN %) 33.3 19.1 45.0 19.6 17.5 84.6 81.0 89.4 51.4 48.1 29.4 83.3 38.9 WIND SPEED (MEAN KNOTS) 3.3 4.7 4.0 5.6 6.3 11.7 10.5 10.4 3.7 2.7 1.7 0.6 5.4 FASTEST WIND DIRECTION 190 290 280 200 360 10 360 360 360 40 330 240 200 FASTEST WIND SPEED (KNOTS) 27 21 19 35 19 31 29 31 19 19 14 10 35 DAY 13 28 15 24 8 28 13 9 1 9 13 11 DAYS WITH SKY CLEAR (0-2)/8 16 13 6 14 23 29 30 27 26 23 26 17 250 DAYS WITH P.CLOUDY (3-6)/8 8 11 12 13 6 1 1 4 4 8 4 7 79 DAYS WITH CLOUDY (7-8)/8 7 4 13 3 2 0 0 0 0 0 0 7 36 DAYS WITH VISIBILITY =< 2 KM 4 2 4 4 0 0 0 1 0 0 1 0 16 DURATION OF SUNSHINE HOURS 196.5 219.6 209.3 269.1 348.9 363.2 386.3 352.7 310.9 314.6 282.3 254.8 3508.2 ======================================================================================================================= 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 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 883.1 882.6 881.5 880.2 879.4 877.0 873.3 876.3 879.4 883.6 886.0 887.8 880.8 MAX. QFE PRESSURE IN HPA 890.7 891.9 887.4 888.9 886.0 883.1 877.7 880.7 885.1 889.2 890.9 894.2 894.2 DAY-HOUR 4- 6 3- 6 28- 6 12- 6 3- 6 5- 6 29- 6 25- 3 13- 6 29- 6 21- 6 10- 6 MIN. QFE PRESSURE IN HPA 867.6 868.5 873.5 870.8 870.4 870.9 867.0 871.7 874.3 876.4 881.4 880.8 867.0 DAY-HOUR 13-15 13-12 15-12 6-12 30-12 29-15 8-15 13-12 3-12 2-12 1-12 21-12 MEAN QNH PRESSURE IN HPA 1021.0 1020.4 1019.1 1017.7 1016.8 1014.1 1010.0 1013.3 1016.8 1021.5 1024.3 1026.2 1018.4 MAX. QNH PRESSURE IN HPA 1029.5 1030.9 1025.8 1027.5 1024.2 1021.0 1014.9 1018.3 1023.2 1027.8 1029.8 1033.5 1033.5 DAY-HOUR 4- 6 3- 6 28- 6 12- 6 3- 6 5- 6 29- 6 25- 3 13- 6 29- 6 21- 6 10- 6 MIN. QNH PRESSURE IN HPA 1003.5 1004.6 1010.2 1007.1 1006.7 1007.3 1002.9 1008.2 1011.1 1013.4 1019.1 1018.4 1002.9 DAY-HOUR 13-15 13-12 15-12 6-12 30-12 29-15 8-15 13-12 3-12 2-12 1-12 21-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 883.1 882.9 881.9 880.9 880.4 877.8 874.3 876.9 880.5 884.4 886.7 888.1 881.5 MAX. QFE PRESSURE IN HPA 888.7 890.5 886.6 888.2 885.6 883.0 877.6 880.7 883.6 888.8 890.6 893.3 893.3 DAY 4 3 27 12 8 5 15 25 26 29 21 10 MIN. QFE PRESSURE IN HPA 876.9 871.7 873.6 876.4 873.7 872.9 869.3 872.8 876.9 879.6 883.4 882.3 869.3 DAY 13 16 2 24 30 29 8 13 3 3 17 19 MEAN QNH PRESSURE IN HPA 1021.0 1020.8 1019.6 1018.5 1017.9 1015.1 1011.0 1014.0 1018.0 1022.4 1025.0 1026.7 1019.2 MAX. QNH PRESSURE IN HPA 1027.3 1029.3 1024.9 1026.7 1023.8 1020.9 1014.8 1018.3 1021.5 1027.4 1029.4 1032.5 1032.5 DAY 4 3 27 12 8 5 15 25 26 29 21 10 MIN. QNH PRESSURE IN HPA 1014.0 1008.2 1010.3 1013.4 1010.4 1009.5 1005.5 1009.4 1014.0 1017.0 1021.3 1020.1 1005.5 DAY 13 16 2 24 30 29 8 13 3 3 17 19 MEAN QFF PRESSURE IN HPA 1022.1 1020.7 1016.4 1011.5 1008.9 1004.3 998.9 1002.5 1009.3 1016.8 1022.5 1025.6 1013.3 MAX. QFF PRESSURE IN HPA 1029.3 1030.0 1023.0 1022.3 1017.5 1009.7 1003.6 1007.2 1013.9 1023.5 1026.9 1032.5 1032.5 DAY 23 3 7 12 8 6 27 25 25 29 21 7 MIN. QFF PRESSURE IN HPA 1014.3 1006.9 1007.2 1003.4 1000.0 996.8 990.4 997.8 1002.1 1008.1 1018.1 1016.4 990.4 DAY 13 16 2 21 30 29 9 13 7 3 2 19 ======================================================================================================================= 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 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 884.8 884.3 883.0 881.7 880.9 878.2 874.5 877.5 881.0 885.1 887.6 889.4 882.3 MAX. QFE PRESSURE IN HPA 890.7 891.9 887.4 888.9 886.0 883.1 877.7 880.7 885.1 889.2 890.9 894.2 894.2 DAY 4 3 28 12 3 5 29 25 13 29 21 10 MIN. QFE PRESSURE IN HPA 876.7 873.4 875.0 875.3 872.9 873.2 869.1 873.2 877.3 880.5 884.8 883.3 869.1 DAY 13 16 2 6 30 29 8 13 3 2 17 21 MEAN QNH PRESSURE IN HPA 1022.9 1022.3 1020.9 1019.4 1018.5 1015.4 1011.3 1014.7 1018.6 1023.3 1026.1 1028.1 1020.1 MAX. QNH PRESSURE IN HPA 1029.5 1030.9 1025.8 1027.5 1024.2 1021.0 1014.9 1018.3 1023.2 1027.8 1029.8 1033.5 1033.5 DAY 4 3 28 12 3 5 29 25 13 29 21 10 MIN. QNH PRESSURE IN HPA 1013.8 1010.1 1011.9 1012.2 1009.5 1009.8 1005.2 1009.8 1014.5 1018.1 1022.9 1021.2 1005.2 DAY 13 16 2 6 30 29 8 13 3 2 17 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 883.1 882.6 881.6 880.4 879.6 877.2 873.5 876.5 879.4 883.4 885.6 887.4 880.9 MAX. QFE PRESSURE IN HPA 889.4 890.1 886.0 887.6 884.5 881.7 876.7 878.9 883.4 887.3 889.1 892.0 892.0 DAY 4 3 27 12 3 5 19 19 13 10 21 9 MIN. QFE PRESSURE IN HPA 872.5 870.6 874.0 872.9 871.5 872.2 868.4 872.8 875.6 878.2 882.6 881.2 868.4 DAY 13 13 15 6 30 29 8 13 3 2 1 21 MEAN QNH PRESSURE IN HPA 1020.9 1020.5 1019.3 1017.9 1017.0 1014.4 1010.2 1013.5 1016.8 1021.3 1023.8 1025.8 1018.5 MAX. QNH PRESSURE IN HPA 1028.1 1028.9 1024.2 1026.0 1022.6 1019.4 1013.8 1016.3 1021.3 1025.7 1027.7 1031.0 1031.0 DAY 4 3 27 12 3 5 19 19 13 10 21 9 MIN. QNH PRESSURE IN HPA 1009.1 1006.9 1010.7 1009.5 1007.9 1008.7 1004.4 1009.4 1012.5 1015.5 1020.4 1018.8 1004.4 DAY 13 13 15 6 30 29 8 13 3 2 1 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 881.9 881.2 880.1 878.7 877.8 875.8 872.2 875.1 877.9 882.1 884.6 886.4 879.5 MAX. QFE PRESSURE IN HPA 887.8 888.4 884.3 885.2 882.9 880.2 875.6 878.5 881.6 885.9 887.7 891.0 891.0 DAY 4 3 28 1 7 6 21 19 25 29 21 10 MIN. QFE PRESSURE IN HPA 869.5 868.5 873.5 870.8 870.4 871.0 867.2 871.7 874.3 876.4 881.4 880.8 867.2 DAY 13 13 15 6 30 29 8 13 3 2 1 21 MEAN QNH PRESSURE IN HPA 1019.7 1018.8 1017.6 1016.0 1015.1 1012.8 1008.7 1012.0 1015.1 1019.8 1022.7 1024.7 1016.9 MAX. QNH PRESSURE IN HPA 1026.3 1026.9 1022.3 1023.3 1020.8 1017.7 1012.5 1015.8 1019.3 1024.1 1026.2 1029.9 1029.9 DAY 4 3 28 1 7 6 21 19 25 29 21 10 MIN. QNH PRESSURE IN HPA 1005.7 1004.6 1010.2 1007.1 1006.7 1007.4 1003.1 1008.2 1011.1 1013.4 1019.1 1018.4 1003.1 DAY 13 13 15 6 30 29 8 13 3 2 1 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION 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 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 882.7 882.1 880.8 879.2 878.1 875.9 872.2 875.4 878.5 883.0 885.8 887.5 880.1 MAX. QFE PRESSURE IN HPA 889.1 889.0 885.8 885.8 883.9 880.6 875.6 878.8 882.0 887.1 888.8 892.1 892.1 DAY 4 3 28 1 3 6 22 19 25 25 20 29 MIN. QFE PRESSURE IN HPA 867.6 870.9 874.3 874.0 871.5 870.9 867.0 871.9 874.9 876.9 882.6 882.5 867.0 DAY 13 13 15 6 30 29 8 13 2 2 1 18 MEAN QNH PRESSURE IN HPA 1020.6 1019.9 1018.4 1016.6 1015.4 1012.9 1008.7 1012.3 1015.8 1020.9 1024.0 1025.9 1017.6 MAX. QNH PRESSURE IN HPA 1027.7 1027.6 1024.0 1024.0 1021.9 1018.2 1012.5 1016.1 1019.7 1025.5 1027.4 1031.1 1031.1 DAY 4 3 28 1 3 6 22 19 25 25 20 29 MIN. QNH PRESSURE IN HPA 1003.5 1007.3 1011.1 1010.7 1007.9 1007.3 1002.9 1008.4 1011.8 1014.0 1020.4 1020.3 1002.9 DAY 13 13 15 6 30 29 8 13 2 2 1 18 MEAN QFF PRESSURE IN HPA 1021.5 1019.8 1015.0 1009.5 1006.3 1002.2 996.6 1000.8 1007.1 1015.3 1021.5 1024.8 1011.7 MAX. QFF PRESSURE IN HPA 1027.5 1028.3 1022.0 1019.8 1016.9 1008.0 1001.2 1004.0 1012.0 1022.0 1025.5 1031.1 1031.1 DAY 15 3 4 7 3 6 21 28 25 25 24 7 MIN. QFF PRESSURE IN HPA 1002.5 1006.3 1006.9 1001.2 997.9 994.4 988.3 996.6 1000.4 1005.1 1017.1 1018.4 988.3 DAY 13 13 19 21 30 29 8 13 7 2 1 19 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 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.9 11.7 14.8 23.2 28.7 33.8 33.6 32.8 28.5 23.8 16.1 10.7 22.1 MINIMUN AIR TEMPERATURE (C) 1.3 5.6 7.5 13.2 17.8 22.7 25.4 25.1 17.8 12.7 7.1 0.4 13.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 5 23 30 27 6 0 0 0 91 DAYS WITH MINIMUM TEMP. <=-4 4 0 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH FREEZING MIN.<= 0 7 3 0 0 0 0 0 0 0 0 0 15 25 TEMPERATURE RECORDS LOWEST(C) -6.2 -2.2 0.6 6.0 13.2 18.4 20.6 19.2 11.2 9.8 2.4 -2.8 -6.2 DAY 4 2 8 13 23 18 23 15 30 10 5 20 MAXIMUM AIR TEMPERATURE (C) 12.9 15.9 19.6 28.5 34.0 39.1 38.2 37.1 34.2 29.9 21.4 17.2 27.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 12 31 30 31 31 27 16 0 0 178 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.6 21.4 29.8 33.8 37.6 43.8 43.0 39.6 39.6 32.6 28.6 21.8 43.8 DAY 17 27 27 29 20 30 8 30 1 12 2 30 DIF. BETWEEN (MAX.-MIN.) (C) 11.6 10.3 12.1 15.3 16.2 16.4 12.8 12.0 16.4 17.2 14.3 16.8 14.3 MEAN DAILY TEMP. (MDT) (C) 7.1 10.8 13.6 20.9 25.9 30.9 31.8 31.1 26.0 21.3 14.3 8.8 20.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 32.8 152.7 296.7 335.7 313.7 152.4 21.8 1.0 0.0 1306.8 HEATING DEG. DAYS(BASE 18 0C) 337.5 202.7 142.6 10.7 0.0 0.0 0.0 0.0 0.0 0.0 117.2 285.4 1096.1 DEWPOINT (MEAN C) -3.8 2.8 1.2 0.3 0.4 4.3 7.1 3.6 2.3 -0.4 0.1 -6.4 1.0 MIXING RATIO (G/KG) 3.58 5.54 5.02 4.69 4.71 6.07 7.50 5.75 5.39 4.29 4.54 2.81 4.99 VAPOUR PRESSURE (HPA) 5.05 7.80 7.04 6.58 6.60 8.45 10.39 8.01 7.55 6.05 6.40 3.99 6.99 SATURATION DEF. (HPA) 6.07 6.48 10.86 23.20 34.29 46.26 43.08 42.60 33.32 24.94 12.76 9.76 24.47 RELATIVE HUMIDITY (MEAN %) 49 59 46 25 18 17 21 17 21 22 38 33 31 RELATIVE HUMIDITY (MAX. %) 70 87 75 45 31 27 29 23 36 41 60 56 48 RELATIVE HUMIDITY (MIN. %) 34 42 31 16 12 12 16 13 14 13 25 21 21 RELATIVE HUMIDITY (MEAN% 03UTC) 67 86 74 45 31 27 29 23 35 41 59 55 48 RELATIVE HUMIDITY (MEAN% 09UTC) 39 47 36 18 13 13 17 14 15 15 26 23 23 RELATIVE HUMIDITY (MEAN% 15UTC) 49 58 42 21 15 15 20 16 19 20 38 36 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.1 98.0 50.7 0.8 1.1 0.0 1.0 0.0 3.2 0.0 0.5 0.0 195.4 DAYS WITH PRECIPITATION >=10 2 2 1 0 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 2 4 2 0 0 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 1 4 7 5 0 1 0 1 0 1 0 0 0 19 DAYS WITH PRECIPITATION 7 8 11 5 3 0 2 1 3 1 5 1 47 GREATEST DAILY PRECIPITATION 20.0 65.0 36.0 0.5 1.0 0.0 1.0 0.0 2.0 0.0 0.2 0.0 65.0 DAY 22 6 5 7 18 ** 11 ** 25 ** 12 ** DAY WITH THUNDER STORM 2 3 2 1 0 0 1 0 1 1 0 0 11 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 1 1 1 1 0 1 2 2 0 0 0 9 WIND DIRECTION (PREVAILING) 225 135 270 135 360 45 360 360 45 135 135 225 360 PREVAILING WIND SPEED(KNOTS) 7.3 6.9 8.9 8.1 13.4 11.1 13.5 12.8 8.4 7.7 6.9 5.8 13.4 PREVAILING WIND PERCENT 7.7 13.6 10.3 11.3 16.8 19.3 29.7 56.1 16.0 11.6 12.7 5.8 11.7 CALMS PERCENT OF WIND 78.1 76.4 70.3 56.0 40.6 36.7 30.3 20.6 52.0 69.0 67.3 81.9 56.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 242 154 255 221 9 44 27 4 25 102 174 216 20 VECTOR WIND MAGNITUDE(KNOTS) 0.9 0.7 0.6 0.9 2.3 3.8 6.7 8.0 3.3 0.8 0.9 0.7 1.6 WIND STEADINESES (MEAN %) 56.3 43.8 27.3 22.5 41.1 60.3 80.7 89.9 67.3 33.3 42.9 63.6 39.0 WIND SPEED (MEAN KNOTS) 1.6 1.6 2.2 4.0 5.6 6.3 8.3 8.9 4.9 2.4 2.1 1.1 4.1 FASTEST WIND DIRECTION 240 130 270 250 360 30 360 360 360 360 260 240 360 FASTEST WIND SPEED (KNOTS) 12 14 14 23 25 23 31 27 29 19 21 12 31 DAY 6 27 19 9 28 12 4 10 5 18 9 6 DAYS WITH SKY CLEAR (0-2)/8 10 8 9 17 25 26 24 31 26 31 14 23 244 DAYS WITH P.CLOUDY (3-6)/8 13 9 12 10 6 4 7 0 4 0 14 5 84 DAYS WITH CLOUDY (7-8)/8 8 11 10 3 0 0 0 0 0 0 2 3 37 DAYS WITH VISIBILITY =< 2 KM 1 1 0 1 0 0 1 0 1 0 0 1 6 DURATION OF SUNSHINE HOURS 223.8 192.8 223.6 289.9 359.7 346.3 336.3 368.2 316.8 313.7 251.7 263.0 3485.8 ======================================================================================================================= 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 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 884.0 884.0 880.7 880.5 878.2 875.4 873.1 874.8 878.3 883.2 884.7 888.0 880.4 MAX. QFE PRESSURE IN HPA 890.5 891.5 886.9 885.7 883.7 882.1 877.1 880.8 886.9 886.9 891.9 893.3 893.3 DAY-HOUR 3- 6 12- 6 31- 6 1- 6 12- 6 1- 3 28- 6 19- 6 30- 6 11- 6 14- 6 6- 6 MIN. QFE PRESSURE IN HPA 876.2 874.0 874.5 874.0 869.7 867.9 869.0 869.6 872.9 879.7 878.9 880.8 867.9 DAY-HOUR 19- 3 6-12 3-12 9-12 21-12 23-15 11-12 6-12 16-12 25-12 1-12 16-12 MEAN QNH PRESSURE IN HPA 1022.0 1022.0 1018.3 1018.1 1015.4 1012.4 1009.8 1011.7 1015.6 1021.1 1022.8 1026.4 1018.0 MAX. QNH PRESSURE IN HPA 1029.3 1030.4 1025.3 1023.9 1021.7 1019.9 1014.2 1018.4 1025.3 1025.3 1030.9 1032.5 1032.5 DAY-HOUR 3- 6 12- 6 31- 6 1- 6 12- 6 1- 3 28- 6 19- 6 30- 6 11- 6 14- 6 6- 6 MIN. QNH PRESSURE IN HPA 1013.2 1010.7 1011.3 1010.7 1005.9 1003.9 1005.1 1005.8 1009.5 1017.2 1016.3 1018.4 1003.9 DAY-HOUR 19- 3 6-12 3-12 9-12 21-12 23-15 11-12 6-12 16-12 25-12 1-12 16-12 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 884.3 884.0 880.9 881.2 879.3 876.5 874.0 875.7 879.1 884.1 885.1 888.5 881.1 MAX. QFE PRESSURE IN HPA 889.3 889.6 885.8 885.1 882.9 882.1 876.9 880.1 886.1 886.1 890.2 892.3 892.3 DAY 3 12 31 1 12 1 28 19 30 11 15 6 MIN. QFE PRESSURE IN HPA 876.2 874.3 874.8 875.4 872.3 869.8 871.4 871.8 875.6 881.8 881.4 883.1 869.8 DAY 19 6 3 9 21 24 11 6 16 25 12 16 MEAN QNH PRESSURE IN HPA 1022.3 1022.0 1018.5 1018.8 1016.7 1013.6 1010.7 1012.6 1016.5 1022.1 1023.3 1027.1 1018.7 MAX. QNH PRESSURE IN HPA 1028.0 1028.3 1024.0 1023.2 1020.8 1019.9 1014.0 1017.6 1024.4 1024.4 1029.0 1031.3 1031.3 DAY 3 12 31 1 12 1 28 19 30 11 15 6 MIN. QNH PRESSURE IN HPA 1013.2 1011.1 1011.6 1012.3 1008.8 1006.0 1007.8 1008.3 1012.5 1019.5 1019.1 1021.0 1006.0 DAY 19 6 3 9 21 24 11 6 16 25 12 16 MEAN QFF PRESSURE IN HPA 1023.4 1020.8 1015.9 1012.6 1007.7 1002.3 998.9 1001.3 1007.7 1016.1 1020.7 1028.0 1013.0 MAX. QFF PRESSURE IN HPA 1032.0 1026.8 1024.1 1019.1 1013.3 1010.1 1003.4 1007.4 1018.6 1019.8 1027.6 1032.5 1032.5 DAY 3 3 20 1 27 1 28 19 30 27 15 25 MIN. QFF PRESSURE IN HPA 1011.9 1010.2 1008.3 1005.0 998.3 994.4 995.9 995.3 1003.1 1012.5 1012.9 1020.1 994.4 DAY 19 6 3 9 21 26 6 6 16 25 2 17 ======================================================================================================================= 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 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 885.6 885.4 882.1 882.1 879.6 876.9 874.4 876.1 879.8 884.9 886.2 889.6 881.9 MAX. QFE PRESSURE IN HPA 890.5 891.5 886.9 885.7 883.7 882.1 877.1 880.8 886.9 886.9 891.9 893.3 893.3 DAY 3 12 31 1 12 1 28 19 30 11 14 6 MIN. QFE PRESSURE IN HPA 878.2 875.6 877.2 876.0 872.8 870.6 871.9 872.1 875.7 882.8 882.6 883.9 870.6 DAY 19 6 3 9 21 24 11 7 16 25 12 16 MEAN QNH PRESSURE IN HPA 1023.8 1023.5 1019.8 1019.8 1017.1 1014.0 1011.2 1013.1 1017.2 1023.0 1024.4 1028.3 1019.6 MAX. QNH PRESSURE IN HPA 1029.3 1030.4 1025.3 1023.9 1021.7 1019.9 1014.2 1018.4 1025.3 1025.3 1030.9 1032.5 1032.5 DAY 3 12 31 1 12 1 28 19 30 11 14 6 MIN. QNH PRESSURE IN HPA 1015.5 1012.5 1014.3 1013.0 1009.4 1006.9 1008.4 1008.6 1012.7 1020.6 1020.4 1021.9 1006.9 DAY 19 6 3 9 21 24 11 7 16 25 12 16 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 884.0 884.2 881.0 880.8 878.3 875.7 873.4 875.0 878.4 883.0 884.3 887.6 880.5 MAX. QFE PRESSURE IN HPA 888.6 890.0 886.4 884.3 882.5 881.0 875.7 879.5 885.5 884.9 889.5 891.3 891.3 DAY 12 12 19 1 27 1 28 19 30 27 14 24 MIN. QFE PRESSURE IN HPA 878.1 876.1 875.0 874.5 871.2 870.0 870.7 870.7 874.4 880.8 880.4 881.5 870.0 DAY 19 6 3 9 21 23 11 6 16 25 1 16 MEAN QNH PRESSURE IN HPA 1022.0 1022.2 1018.7 1018.4 1015.6 1012.7 1010.0 1011.8 1015.7 1020.9 1022.4 1026.0 1018.0 MAX. QNH PRESSURE IN HPA 1027.2 1028.7 1024.7 1022.3 1020.3 1018.6 1012.7 1016.9 1023.7 1023.0 1028.2 1030.2 1030.2 DAY 12 12 19 1 27 1 28 19 30 27 14 24 MIN. QNH PRESSURE IN HPA 1015.4 1013.1 1011.9 1011.3 1007.6 1006.2 1007.0 1007.0 1011.2 1018.4 1017.9 1019.2 1006.2 DAY 19 6 3 9 21 23 11 6 16 25 1 16 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 882.7 882.8 879.6 879.0 876.7 874.0 872.0 873.6 877.0 881.7 883.4 886.6 879.1 MAX. QFE PRESSURE IN HPA 887.8 888.7 884.6 882.4 881.2 879.5 874.0 877.9 883.9 883.9 889.0 890.6 890.6 DAY 2 12 19 1 27 1 18 19 30 27 14 6 MIN. QFE PRESSURE IN HPA 876.3 874.0 874.5 874.0 869.7 868.1 869.0 869.6 872.9 879.7 878.9 880.8 868.1 DAY 18 6 3 9 21 23 11 6 16 25 1 16 MEAN QNH PRESSURE IN HPA 1020.5 1020.6 1017.0 1016.4 1013.8 1010.8 1008.4 1010.3 1014.1 1019.5 1021.3 1024.9 1016.5 MAX. QNH PRESSURE IN HPA 1026.3 1027.3 1022.7 1020.2 1018.8 1016.9 1010.7 1015.1 1021.9 1021.9 1027.6 1029.4 1029.4 DAY 2 12 19 1 27 1 18 19 30 27 14 6 MIN. QNH PRESSURE IN HPA 1013.3 1010.7 1011.3 1010.7 1005.9 1004.1 1005.1 1005.8 1009.5 1017.2 1016.3 1018.4 1004.1 DAY 18 6 3 9 21 23 11 6 16 25 1 16 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 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 883.8 883.6 879.9 879.4 876.9 874.1 872.1 873.9 877.5 882.5 884.5 887.6 879.6 MAX. QFE PRESSURE IN HPA 888.6 889.2 885.3 882.1 881.3 880.2 874.7 878.2 884.1 884.7 889.7 891.5 891.5 DAY 2 12 19 1 27 1 18 18 30 26 14 1 MIN. QFE PRESSURE IN HPA 877.3 875.0 875.2 874.6 869.9 867.9 869.2 869.9 873.4 880.7 879.7 882.3 867.9 DAY 18 6 3 9 21 23 11 6 16 25 12 15 MEAN QNH PRESSURE IN HPA 1021.7 1021.6 1017.4 1016.9 1014.0 1010.9 1008.6 1010.6 1014.7 1020.3 1022.5 1026.1 1017.1 MAX. QNH PRESSURE IN HPA 1027.2 1027.8 1023.5 1019.9 1019.0 1017.7 1011.5 1015.5 1022.1 1022.8 1028.4 1030.4 1030.4 DAY 2 12 19 1 27 1 18 18 30 26 14 1 MIN. QNH PRESSURE IN HPA 1014.5 1011.9 1012.1 1011.4 1006.1 1003.9 1005.3 1006.1 1010.1 1018.3 1017.2 1020.1 1003.9 DAY 18 6 3 9 21 23 11 6 16 25 12 15 MEAN QFF PRESSURE IN HPA 1022.8 1020.3 1014.8 1010.6 1004.9 999.5 996.7 999.3 1005.9 1014.4 1020.0 1026.9 1011.3 MAX. QFF PRESSURE IN HPA 1030.7 1026.5 1023.5 1015.6 1010.8 1007.5 1000.4 1004.9 1016.4 1018.1 1026.9 1031.9 1031.9 DAY 3 12 19 12 27 1 18 18 30 26 30 1 MIN. QFF PRESSURE IN HPA 1012.5 1010.6 1008.6 1003.7 995.4 992.0 994.0 993.4 1000.4 1011.4 1012.9 1019.9 992.0 DAY 18 6 28 9 21 25 11 6 16 24 1 16 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 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.4 10.8 15.5 26.5 32.5 32.3 32.3 32.3 29.6 23.0 13.5 10.6 22.3 MINIMUN AIR TEMPERATURE (C) 1.2 2.1 6.6 15.7 20.7 22.4 25.4 24.6 19.3 12.0 5.8 3.1 13.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 17 18 31 27 8 0 0 0 102 DAYS WITH MINIMUM TEMP. <=-4 3 0 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH FREEZING MIN.<= 0 10 10 0 0 0 0 0 0 0 0 0 6 26 TEMPERATURE RECORDS LOWEST(C) -7.4 -2.8 0.4 10.2 16.6 15.8 22.0 19.2 15.0 8.8 1.0 -2.4 -7.4 DAY 13 10 7 1 6 5 25 25 22 10 13 31 MAXIMUM AIR TEMPERATURE (C) 13.2 16.1 20.6 31.6 37.8 37.1 36.2 36.5 35.2 29.3 18.7 15.7 27.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 22 31 30 31 31 30 15 0 0 190 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.2 24.0 29.0 36.4 41.4 41.6 39.8 38.6 38.8 32.2 27.2 20.4 41.6 DAY 1 26 24 23 28 25 8 3 2 1 1 23 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 14.0 14.0 15.9 17.1 14.7 10.8 11.9 15.9 17.3 12.9 12.6 14.0 MEAN DAILY TEMP. (MDT) (C) 7.2 9.1 13.6 23.6 29.2 29.8 30.8 30.6 27.2 20.7 12.3 9.4 20.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 2.6 94.1 255.6 262.9 303.6 297.3 186.7 16.9 0.0 0.0 1419.8 HEATING DEG. DAYS(BASE 18 0C) 333.5 258.8 149.5 0.9 0.0 0.0 0.0 0.0 0.0 0.2 172.5 265.6 1181.0 DEWPOINT (MEAN C) -4.3 -6.0 -6.2 -0.5 1.2 1.0 3.6 1.6 -0.2 0.2 -1.9 -1.5 -1.1 MIXING RATIO (G/KG) 3.53 2.93 3.11 4.32 4.87 4.86 5.86 5.09 4.48 4.50 4.08 4.02 4.30 VAPOUR PRESSURE (HPA) 4.97 4.13 4.39 6.06 6.81 6.78 8.15 7.11 6.29 6.35 5.77 5.68 6.04 SATURATION DEF. (HPA) 6.75 9.60 14.39 30.19 43.90 43.08 41.01 42.17 36.90 23.29 10.55 7.69 25.80 RELATIVE HUMIDITY (MEAN %) 47 35 28 19 15 15 17 15 17 24 40 47 27 RELATIVE HUMIDITY (MAX. %) 70 65 49 38 25 22 22 22 28 42 67 74 44 RELATIVE HUMIDITY (MIN. %) 31 19 17 12 10 11 13 11 11 15 24 31 17 RELATIVE HUMIDITY (MEAN% 03UTC) 67 64 48 38 25 22 22 22 28 42 66 74 43 RELATIVE HUMIDITY (MEAN% 09UTC) 38 24 19 13 11 12 15 13 12 17 27 34 20 RELATIVE HUMIDITY (MEAN% 15UTC) 47 31 26 16 14 14 16 14 15 22 38 45 25 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 51.6 5.7 24.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 26.0 9.0 116.3 DAYS WITH PRECIPITATION >=10 3 0 1 0 0 0 0 0 0 0 1 0 5 DAYS WITH PRECIPITATION >= 5 3 1 2 0 0 0 0 0 0 0 3 0 9 DAYS WITH PRECIPITATION >= 1 4 1 2 0 0 0 0 0 0 0 4 4 15 DAYS WITH PRECIPITATION 9 5 3 0 1 0 0 0 1 1 4 7 31 GREATEST DAILY PRECIPITATION 20.2 5.0 15.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12.0 3.0 20.2 DAY 18 29 28 ** ** ** ** ** ** ** 10 16 DAY WITH THUNDER STORM 0 0 3 0 1 0 0 0 0 0 3 0 7 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 1 1 7 2 1 6 4 2 2 0 0 0 26 WIND DIRECTION (PREVAILING) 135 225 135 270 135 360 360 360 360 135 135 135 360 PREVAILING WIND SPEED(KNOTS) 5.2 6.0 7.9 7.8 6.4 14.9 15.7 13.7 11.2 6.6 6.2 6.2 14.4 PREVAILING WIND PERCENT 8.4 9.7 12.9 10.7 11.6 23.3 61.9 41.9 16.7 14.8 11.3 7.7 12.4 CALMS PERCENT OF WIND 72.3 68.3 57.4 62.7 54.2 32.7 5.8 21.9 50.0 73.5 75.3 79.4 54.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 246 214 221 260 83 27 6 12 23 148 136 201 12 VECTOR WIND MAGNITUDE(KNOTS) 1.0 0.8 1.4 0.9 0.9 5.0 12.6 8.6 3.0 1.2 0.7 0.6 2.0 WIND STEADINESES (MEAN %) 55.6 38.1 37.8 34.6 26.5 71.4 95.5 93.5 65.2 70.6 46.7 42.9 45.5 WIND SPEED (MEAN KNOTS) 1.8 2.1 3.7 2.6 3.4 7.0 13.2 9.2 4.6 1.7 1.5 1.4 4.4 FASTEST WIND DIRECTION 300 300 240 290 170 360 360 360 360 150 30 280 360 FASTEST WIND SPEED (KNOTS) 19 16 27 19 19 35 31 29 21 16 16 19 35 DAY 30 15 9 12 17 3 23 6 19 4 17 16 DAYS WITH SKY CLEAR (0-2)/8 13 20 20 18 23 29 31 31 27 26 17 15 270 DAYS WITH P.CLOUDY (3-6)/8 8 6 8 9 5 1 0 0 3 5 13 11 69 DAYS WITH CLOUDY (7-8)/8 10 3 3 3 3 0 0 0 0 0 0 5 27 DAYS WITH VISIBILITY =< 2 KM 5 0 3 0 0 2 1 0 1 0 0 0 12 DURATION OF SUNSHINE HOURS 222.1 251.0 274.5 288.1 342.4 360.8 383.8 364.7 305.0 310.3 247.7 242.6 3593.0 ======================================================================================================================= 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 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 883.5 882.3 881.2 880.0 876.7 874.7 874.1 875.4 878.5 883.8 886.3 885.6 880.2 MAX. QFE PRESSURE IN HPA 891.2 889.3 886.6 886.0 883.0 880.8 878.3 880.0 885.1 888.8 894.1 892.0 894.1 DAY-HOUR 31- 6 11- 6 4- 6 1- 6 6- 6 3- 6 26- 6 23- 6 29- 6 16- 6 17- 6 18- 6 MIN. QFE PRESSURE IN HPA 876.3 872.8 874.9 875.0 871.3 869.3 869.3 870.1 869.4 878.6 877.5 877.3 869.3 DAY-HOUR 21-12 7-12 9-15 21-12 20-12 25-12 9-12 31-12 1-12 1-12 6-12 16- 3 MEAN QNH PRESSURE IN HPA 1021.5 1020.1 1018.9 1017.5 1013.8 1011.5 1010.9 1012.3 1015.8 1021.8 1024.5 1023.8 1017.7 MAX. QNH PRESSURE IN HPA 1030.1 1028.0 1024.9 1024.2 1020.9 1018.4 1015.6 1017.5 1023.2 1027.4 1033.4 1031.0 1033.4 DAY-HOUR 31- 6 11- 6 4- 6 1- 6 6- 6 3- 6 26- 6 23- 6 29- 6 16- 6 17- 6 18- 6 MIN. QNH PRESSURE IN HPA 1013.3 1009.4 1011.8 1011.9 1007.7 1005.5 1005.5 1006.4 1005.6 1015.9 1014.7 1014.5 1005.5 DAY-HOUR 21-12 7-12 9-15 21-12 20-12 25-12 9-12 31-12 1-12 1-12 6-12 16- 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 883.7 882.6 881.8 880.9 877.8 875.8 874.7 876.2 879.4 884.7 886.8 886.0 880.9 MAX. QFE PRESSURE IN HPA 890.3 887.9 885.6 884.9 882.8 880.2 877.5 879.1 884.3 887.9 892.9 890.9 892.9 DAY 31 11 4 3 6 3 25 23 29 7 17 18 MIN. QFE PRESSURE IN HPA 876.5 874.3 876.1 877.6 874.1 871.4 870.5 871.9 871.2 880.5 880.1 877.3 870.5 DAY 21 8 3 12 28 25 10 31 1 2 7 16 MEAN QNH PRESSURE IN HPA 1021.7 1020.5 1019.6 1018.5 1015.0 1012.8 1011.5 1013.2 1016.8 1022.8 1025.1 1024.3 1018.5 MAX. QNH PRESSURE IN HPA 1029.1 1026.4 1023.8 1023.0 1020.6 1017.7 1014.7 1016.5 1022.3 1026.4 1032.0 1029.8 1032.0 DAY 31 11 4 3 6 3 25 23 29 7 17 18 MIN. QNH PRESSURE IN HPA 1013.6 1011.1 1013.1 1014.8 1010.9 1007.8 1006.8 1008.4 1007.6 1018.1 1017.6 1014.5 1006.8 DAY 21 8 3 12 28 25 10 31 1 2 7 16 MEAN QFF PRESSURE IN HPA 1022.6 1020.5 1017.1 1010.8 1004.5 1001.9 1000.2 1002.1 1007.7 1017.1 1023.6 1024.3 1012.7 MAX. QFF PRESSURE IN HPA 1031.5 1028.9 1024.7 1018.4 1011.8 1008.0 1004.4 1006.2 1014.4 1022.0 1032.0 1032.2 1032.2 DAY 13 11 4 1 6 3 26 21 29 7 17 18 MIN. QFF PRESSURE IN HPA 1012.2 1009.2 1010.2 1005.5 998.6 995.4 994.0 996.7 996.1 1009.5 1013.0 1012.0 994.0 DAY 21 8 25 26 28 25 9 31 1 2 6 16 ======================================================================================================================= 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 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 885.0 883.9 883.0 881.6 878.2 876.0 875.1 876.6 880.0 885.5 887.8 887.2 881.7 MAX. QFE PRESSURE IN HPA 891.2 889.3 886.6 886.0 883.0 880.8 878.3 880.0 885.1 888.8 894.1 892.0 894.1 DAY 31 11 4 1 6 3 26 23 29 16 17 18 MIN. QFE PRESSURE IN HPA 877.9 875.9 877.7 878.0 874.4 871.6 871.2 872.5 871.7 881.5 881.0 879.5 871.2 DAY 21 8 14 12 17 25 9 31 1 2 6 16 MEAN QNH PRESSURE IN HPA 1023.2 1021.9 1020.8 1019.3 1015.5 1013.0 1012.0 1013.7 1017.5 1023.7 1026.2 1025.6 1019.4 MAX. QNH PRESSURE IN HPA 1030.1 1028.0 1024.9 1024.2 1020.9 1018.4 1015.6 1017.5 1023.2 1027.4 1033.4 1031.0 1033.4 DAY 31 11 4 1 6 3 26 23 29 16 17 18 MIN. QNH PRESSURE IN HPA 1015.1 1012.9 1014.9 1015.2 1011.2 1008.0 1007.6 1009.1 1008.2 1019.2 1018.6 1016.9 1007.6 DAY 21 8 14 12 17 25 9 31 1 2 6 16 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 883.2 882.3 881.4 880.1 877.0 874.9 874.2 875.4 878.5 883.5 885.9 885.2 880.2 MAX. QFE PRESSURE IN HPA 889.0 887.6 884.9 884.9 882.0 879.5 877.4 879.0 883.6 886.9 892.7 890.4 892.7 DAY 31 11 4 1 5 3 26 23 29 7 17 17 MIN. QFE PRESSURE IN HPA 876.7 874.7 876.5 877.0 872.9 870.7 870.1 871.3 871.0 879.7 878.4 878.5 870.1 DAY 21 7 9 21 17 25 9 31 1 1 6 15 MEAN QNH PRESSURE IN HPA 1021.1 1020.1 1019.1 1017.7 1014.1 1011.7 1011.0 1012.4 1015.8 1021.5 1024.1 1023.3 1017.7 MAX. QNH PRESSURE IN HPA 1027.6 1026.0 1023.0 1023.0 1019.7 1016.9 1014.6 1016.4 1021.5 1025.3 1031.8 1029.2 1031.8 DAY 31 11 4 1 5 3 26 23 29 7 17 17 MIN. QNH PRESSURE IN HPA 1013.8 1011.5 1013.6 1014.1 1009.5 1007.0 1006.4 1007.7 1007.4 1017.2 1015.7 1015.8 1006.4 DAY 21 7 9 21 17 25 9 31 1 1 6 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 882.4 881.0 879.7 878.4 875.2 873.3 873.2 874.1 877.0 882.3 884.9 884.3 878.8 MAX. QFE PRESSURE IN HPA 887.0 886.3 883.6 882.7 879.8 877.5 876.5 877.4 882.0 885.9 890.6 889.4 890.6 DAY 31 11 28 1 5 3 30 23 29 16 17 17 MIN. QFE PRESSURE IN HPA 876.3 872.8 875.0 875.0 871.3 869.3 869.3 870.1 869.4 878.6 877.5 878.9 869.3 DAY 21 7 9 21 20 25 9 31 1 1 6 15 MEAN QNH PRESSURE IN HPA 1020.1 1018.6 1017.2 1015.7 1012.1 1009.9 1009.8 1010.9 1014.2 1020.0 1023.0 1022.4 1016.2 MAX. QNH PRESSURE IN HPA 1025.4 1024.6 1021.5 1020.5 1017.3 1014.7 1013.6 1014.6 1019.7 1024.1 1029.4 1028.1 1029.4 DAY 31 11 28 1 5 3 30 23 29 16 17 17 MIN. QNH PRESSURE IN HPA 1013.3 1009.4 1011.9 1011.9 1007.7 1005.5 1005.5 1006.4 1005.6 1015.9 1014.7 1016.3 1005.5 DAY 21 7 9 21 20 25 9 31 1 1 6 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION 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 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 883.3 881.7 880.3 878.8 875.3 873.4 873.5 874.4 877.7 883.2 886.0 885.4 879.4 MAX. QFE PRESSURE IN HPA 886.8 886.4 884.0 883.2 880.2 877.1 877.2 877.8 882.6 886.6 892.1 890.9 892.1 DAY 25 11 29 1 5 3 30 23 29 16 17 17 MIN. QFE PRESSURE IN HPA 877.7 873.3 874.9 875.2 871.8 869.3 869.9 870.1 869.7 879.0 877.6 878.7 869.3 DAY 21 7 9 21 20 25 9 31 1 1 6 15 MEAN QNH PRESSURE IN HPA 1021.2 1019.4 1017.8 1016.2 1012.2 1010.1 1010.1 1011.2 1014.9 1021.1 1024.3 1023.6 1016.8 MAX. QNH PRESSURE IN HPA 1025.1 1024.7 1022.0 1021.1 1017.7 1014.2 1014.3 1015.0 1020.4 1024.9 1031.1 1029.8 1031.1 DAY 25 11 29 1 5 3 30 23 29 16 17 17 MIN. QNH PRESSURE IN HPA 1014.9 1010.0 1011.8 1012.1 1008.3 1005.5 1006.1 1006.4 1005.9 1016.4 1014.8 1016.0 1005.5 DAY 21 7 9 21 20 25 9 31 1 1 6 15 MEAN QFF PRESSURE IN HPA 1022.2 1019.4 1015.3 1008.4 1001.7 999.2 998.8 1000.1 1005.8 1015.5 1022.9 1023.6 1011.1 MAX. QFF PRESSURE IN HPA 1029.7 1026.9 1020.7 1016.5 1007.4 1004.8 1003.3 1004.6 1012.6 1019.6 1031.9 1031.6 1031.9 DAY 15 11 1 3 5 3 26 20 29 7 17 17 MIN. QFF PRESSURE IN HPA 1013.2 1009.2 1007.2 1002.9 995.8 992.7 993.4 994.5 994.3 1008.3 1010.9 1014.2 992.7 DAY 21 7 9 21 28 24 9 31 1 1 6 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 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 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.9 10.9 17.8 26.3 31.8 33.8 34.5 32.7 28.8 23.6 16.9 13.2 23.2 MINIMUN AIR TEMPERATURE (C) -0.8 2.0 7.8 15.5 21.3 24.7 26.1 24.4 18.0 12.0 7.3 5.3 13.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 17 27 30 29 10 0 0 0 114 DAYS WITH MINIMUM TEMP. <=-4 4 3 0 0 0 0 0 0 0 0 0 0 7 DAYS WITH FREEZING MIN.<= 0 20 9 1 0 0 0 0 0 0 0 0 1 31 TEMPERATURE RECORDS LOWEST(C) -7.8 -6.6 -0.2 9.4 17.4 18.8 20.4 19.4 11.2 5.6 0.2 -0.6 -7.8 DAY 31 1 13 11 2 3 31 1 15 12 26 18 MAXIMUM AIR TEMPERATURE (C) 13.9 16.5 23.6 31.7 36.8 38.4 39.2 37.3 34.4 30.0 22.5 18.3 28.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 23 31 30 31 31 28 19 0 0 193 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.8 21.0 28.6 36.0 39.6 43.6 43.4 41.4 41.6 33.4 27.2 23.0 43.6 DAY 14 22 31 29 31 30 14 31 1 1 1 7 DIF. BETWEEN (MAX.-MIN.) (C) 14.7 14.5 15.8 16.2 15.5 13.7 13.1 12.9 16.4 18.0 15.2 13.0 15.0 MEAN DAILY TEMP. (MDT) (C) 6.5 9.2 15.7 23.6 29.0 31.5 32.7 30.9 26.2 21.0 14.9 11.8 21.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 82.1 249.4 316.0 361.7 306.6 157.9 24.2 0.3 0.0 1498.2 HEATING DEG. DAYS(BASE 18 0C) 355.9 245.4 79.9 0.0 0.0 0.0 0.0 0.0 0.0 3.6 97.7 191.6 974.0 DEWPOINT (MEAN C) -7.7 -6.6 -3.8 -2.5 -0.4 1.3 3.7 2.6 -0.3 -1.3 -3.4 1.4 -1.4 MIXING RATIO (G/KG) 2.47 2.86 3.56 3.74 4.39 5.05 5.85 5.39 4.37 4.12 3.51 4.90 4.18 VAPOUR PRESSURE (HPA) 3.50 4.03 5.00 5.26 6.14 7.03 8.14 7.53 6.13 5.81 4.96 6.93 5.87 SATURATION DEF. (HPA) 7.91 9.92 16.68 30.53 42.50 47.12 47.87 43.30 35.89 25.10 15.47 8.88 27.60 RELATIVE HUMIDITY (MEAN %) 36 34 27 16 14 14 15 16 16 21 27 48 24 RELATIVE HUMIDITY (MAX. %) 56 58 51 28 24 21 22 23 27 36 46 72 39 RELATIVE HUMIDITY (MIN. %) 23 21 15 11 9 10 12 11 11 14 17 34 16 RELATIVE HUMIDITY (MEAN% 03UTC) 56 57 49 28 24 20 22 22 27 36 46 72 38 RELATIVE HUMIDITY (MEAN% 09UTC) 26 25 18 12 10 12 13 13 13 15 19 35 18 RELATIVE HUMIDITY (MEAN% 15UTC) 35 29 22 14 13 13 14 14 15 20 26 45 22 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 3.0 6.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 3.8 14.0 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH PRECIPITATION >= 5 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 1 1 1 1 0 0 0 0 0 0 0 0 2 5 DAYS WITH PRECIPITATION 1 1 3 0 0 1 0 0 0 0 1 4 11 GREATEST DAILY PRECIPITATION 3.0 6.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 2.0 6.0 DAY 28 12 18 ** ** ** ** ** ** ** 30 17 DAY WITH THUNDER STORM 0 0 2 1 0 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 1 1 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 0 3 1 0 6 1 4 1 0 2 2 0 20 WIND DIRECTION (PREVAILING) 135 135 135 270 45 360 45 360 45 135 225 135 360 PREVAILING WIND SPEED(KNOTS) 7.9 5.6 5.8 5.3 10.5 13.6 11.5 13.9 7.7 6.1 6.7 5.9 13.2 PREVAILING WIND PERCENT 9.7 12.1 12.3 10.7 9.7 28.0 37.1 46.5 14.7 12.9 11.3 9.0 10.3 CALMS PERCENT OF WIND 70.3 65.0 60.0 61.3 49.0 33.3 23.2 23.9 47.3 64.5 64.0 69.7 52.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 151 155 150 155 150 155 1821 VECTOR WIND DIRECTION (MEAN) 207 224 208 235 5 17 26 12 55 151 202 213 17 VECTOR WIND MAGNITUDE(KNOTS) 1.1 1.0 1.0 0.8 1.1 5.8 7.5 8.5 1.7 0.7 1.4 1.0 1.5 WIND STEADINESES (MEAN %) 47.8 38.5 35.7 33.3 24.4 74.4 84.3 88.5 42.5 26.9 56.0 50.0 34.9 WIND SPEED (MEAN KNOTS) 2.3 2.6 2.8 2.4 4.5 7.8 8.9 9.6 4.0 2.6 2.5 2.0 4.3 FASTEST WIND DIRECTION 300 300 180 210 30 360 360 10 20 20 290 270 360 FASTEST WIND SPEED (KNOTS) 19 25 23 27 23 23 31 29 17 19 16 14 31 DAY 21 19 26 30 15 20 9 23 12 10 1 3 DAYS WITH SKY CLEAR (0-2)/8 22 20 16 17 27 25 30 31 29 31 25 19 292 DAYS WITH P.CLOUDY (3-6)/8 7 3 13 13 4 5 1 0 1 0 5 10 62 DAYS WITH CLOUDY (7-8)/8 2 5 2 0 0 0 0 0 0 0 0 2 11 DAYS WITH VISIBILITY =< 2 KM 0 4 1 0 0 0 0 0 0 0 1 1 7 DURATION OF SUNSHINE HOURS 269.5 235.0 275.1 283.0 342.4 341.9 360.4 369.4 314.7 311.6 253.9 223.4 3580.3 ======================================================================================================================= 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 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 885.0 883.1 881.4 879.5 876.7 873.5 873.0 876.2 879.9 883.6 885.2 887.2 880.4 MAX. QFE PRESSURE IN HPA 891.7 891.3 891.3 887.6 881.5 880.9 877.3 881.3 887.4 888.1 890.4 895.2 895.2 DAY-HOUR 30- 6 10- 6 2- 6 1- 6 5- 6 2- 6 31- 3 14- 6 22- 6 10- 6 3- 6 18- 6 MIN. QFE PRESSURE IN HPA 878.7 871.6 868.3 872.8 871.1 869.2 868.2 871.6 872.7 878.9 879.5 881.5 868.2 DAY-HOUR 20-12 21-15 26-12 17-15 30-12 17-12 18-15 27-12 1-12 31-12 17-12 5-12 MEAN QNH PRESSURE IN HPA 1023.1 1021.0 1019.1 1016.9 1013.8 1010.1 1009.6 1013.2 1017.4 1021.5 1023.4 1025.6 1017.9 MAX. QNH PRESSURE IN HPA 1030.7 1030.2 1030.2 1026.0 1019.2 1018.5 1014.5 1019.0 1025.8 1026.6 1029.2 1034.6 1034.6 DAY-HOUR 30- 6 10- 6 2- 6 1- 6 5- 6 2- 6 31- 3 14- 6 22- 6 10- 6 3- 6 18- 6 MIN. QNH PRESSURE IN HPA 1016.0 1008.0 1004.3 1009.4 1007.5 1005.3 1004.2 1008.0 1009.3 1016.3 1016.9 1019.2 1004.2 DAY-HOUR 20-12 21-15 26-12 17-15 30-12 17-12 18-15 27-12 1-12 31-12 17-12 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 885.5 883.5 882.1 880.5 877.6 874.5 873.8 877.0 880.8 884.3 885.8 887.5 881.1 MAX. QFE PRESSURE IN HPA 890.6 890.6 890.8 886.3 880.8 880.1 877.3 880.6 886.5 887.3 889.7 893.4 893.4 DAY 30 10 2 5 12 2 31 14 22 11 3 18 MIN. QFE PRESSURE IN HPA 879.6 874.6 871.8 874.9 873.7 871.5 870.1 873.7 875.3 881.7 879.8 882.6 870.1 DAY 28 22 26 13 31 27 12 3 1 1 1 6 MEAN QNH PRESSURE IN HPA 1023.6 1021.4 1019.9 1018.0 1014.8 1011.3 1010.6 1014.1 1018.4 1022.4 1024.0 1025.9 1018.7 MAX. QNH PRESSURE IN HPA 1029.4 1029.4 1029.6 1024.6 1018.4 1017.6 1014.5 1018.2 1024.8 1025.7 1028.4 1032.6 1032.6 DAY 30 10 2 5 12 2 31 14 22 11 3 18 MIN. QNH PRESSURE IN HPA 1017.0 1011.4 1008.3 1011.8 1010.4 1007.9 1006.4 1010.4 1012.2 1019.4 1017.3 1020.4 1006.4 DAY 28 22 26 13 31 27 12 3 1 1 1 6 MEAN QFF PRESSURE IN HPA 1025.4 1021.4 1016.4 1010.4 1004.5 999.6 998.5 1003.0 1009.8 1016.7 1021.2 1024.6 1012.6 MAX. QFF PRESSURE IN HPA 1035.4 1031.0 1027.8 1019.0 1009.5 1006.7 1004.1 1008.9 1019.4 1022.4 1027.5 1033.4 1035.4 DAY 30 1 2 1 1 3 31 15 22 11 21 18 MIN. QFF PRESSURE IN HPA 1017.9 1006.8 1001.0 1003.0 999.2 994.9 992.6 998.0 1000.3 1011.9 1010.3 1018.8 992.6 DAY 20 22 26 13 31 29 12 28 1 1 1 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 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 886.7 884.7 883.2 881.2 878.3 874.7 874.1 877.4 881.5 885.2 886.8 888.8 881.9 MAX. QFE PRESSURE IN HPA 891.7 891.3 891.3 887.6 881.5 880.9 877.2 881.3 887.4 888.1 890.4 895.2 895.2 DAY 30 10 2 1 5 2 30 14 22 10 3 18 MIN. QFE PRESSURE IN HPA 881.1 876.2 871.7 876.1 874.3 872.5 870.6 874.6 875.9 882.3 881.1 883.9 870.6 DAY 20 22 26 13 31 29 12 3 1 1 1 6 MEAN QNH PRESSURE IN HPA 1025.0 1022.7 1021.1 1018.9 1015.6 1011.5 1010.9 1014.6 1019.2 1023.3 1025.2 1027.4 1019.6 MAX. QNH PRESSURE IN HPA 1030.7 1030.2 1030.2 1026.0 1019.2 1018.5 1014.3 1019.0 1025.8 1026.6 1029.2 1034.6 1034.6 DAY 30 10 2 1 5 2 30 14 22 10 3 18 MIN. QNH PRESSURE IN HPA 1018.7 1013.2 1008.2 1013.1 1011.1 1009.1 1006.9 1011.4 1012.9 1020.1 1018.7 1021.9 1006.9 DAY 20 22 26 13 31 29 12 3 1 1 1 6 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 884.8 883.2 881.6 879.8 877.0 873.7 873.2 876.4 880.0 883.5 884.8 886.7 880.4 MAX. QFE PRESSURE IN HPA 889.2 889.2 889.0 886.1 880.0 879.4 876.9 879.8 885.8 886.6 887.9 892.7 892.7 DAY 30 10 1 1 2 2 31 14 22 10 3 18 MIN. QFE PRESSURE IN HPA 879.8 874.4 868.7 874.5 872.9 871.3 869.7 873.5 874.2 880.6 880.4 882.5 868.7 DAY 20 21 26 13 31 17 12 27 1 31 17 5 MEAN QNH PRESSURE IN HPA 1022.9 1021.1 1019.3 1017.2 1014.1 1010.4 1009.8 1013.4 1017.5 1021.4 1022.9 1025.0 1017.9 MAX. QNH PRESSURE IN HPA 1027.8 1027.8 1027.6 1024.4 1017.5 1016.8 1014.0 1017.3 1024.0 1024.9 1026.4 1031.8 1031.8 DAY 30 10 1 1 2 2 31 14 22 10 3 18 MIN. QNH PRESSURE IN HPA 1017.3 1011.2 1004.8 1011.3 1009.5 1007.7 1005.9 1010.2 1011.0 1018.2 1017.9 1020.3 1004.8 DAY 20 21 26 13 31 17 12 27 1 31 17 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 883.5 881.7 879.9 878.0 875.4 872.2 871.7 875.0 878.3 882.1 883.8 886.0 879.0 MAX. QFE PRESSURE IN HPA 887.6 887.8 887.9 884.4 878.5 877.2 875.5 878.2 883.8 885.7 887.3 891.2 891.2 DAY 30 9 1 4 5 2 31 14 21 10 20 18 MIN. QFE PRESSURE IN HPA 878.7 872.1 868.3 873.0 871.1 869.2 868.4 871.6 872.7 878.9 879.5 881.5 868.3 DAY 20 21 26 17 30 17 12 27 1 31 17 5 MEAN QNH PRESSURE IN HPA 1021.4 1019.4 1017.4 1015.3 1012.3 1008.8 1008.2 1011.9 1015.6 1019.9 1021.8 1024.2 1016.3 MAX. QNH PRESSURE IN HPA 1026.0 1026.3 1026.4 1022.4 1015.8 1014.3 1012.4 1015.5 1021.8 1023.9 1025.7 1030.1 1030.1 DAY 30 9 1 4 5 2 31 14 21 10 20 18 MIN. QNH PRESSURE IN HPA 1016.0 1008.6 1004.3 1009.6 1007.5 1005.3 1004.4 1008.0 1009.3 1016.3 1016.9 1019.2 1004.3 DAY 20 21 26 17 30 17 12 27 1 31 17 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 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 884.7 882.5 880.4 878.1 875.4 872.3 872.0 875.3 879.0 882.9 885.0 887.1 879.6 MAX. QFE PRESSURE IN HPA 888.3 889.3 888.6 885.2 878.7 876.9 875.9 879.0 885.0 886.5 888.4 891.6 891.6 DAY 30 9 1 4 1 2 31 14 22 10 2 18 MIN. QFE PRESSURE IN HPA 880.6 871.6 870.1 872.8 871.1 869.3 868.2 871.9 873.6 880.0 881.0 882.3 868.2 DAY 20 21 26 17 30 17 18 27 1 1 17 5 MEAN QNH PRESSURE IN HPA 1022.8 1020.3 1017.9 1015.3 1012.4 1008.8 1008.4 1012.2 1016.3 1020.8 1023.1 1025.5 1017.0 MAX. QNH PRESSURE IN HPA 1026.8 1028.0 1027.2 1023.3 1016.0 1014.0 1012.9 1016.4 1023.1 1024.8 1026.9 1030.5 1030.5 DAY 30 9 1 4 1 2 31 14 22 10 2 18 MIN. QNH PRESSURE IN HPA 1018.2 1008.0 1006.4 1009.4 1007.5 1005.5 1004.2 1008.4 1010.3 1017.5 1018.6 1020.1 1004.2 DAY 20 21 26 17 30 17 18 27 1 1 17 5 MEAN QFF PRESSURE IN HPA 1024.6 1020.2 1014.3 1007.6 1001.9 997.0 996.4 1001.0 1007.7 1015.0 1020.4 1024.2 1010.9 MAX. QFF PRESSURE IN HPA 1032.1 1029.4 1025.8 1017.5 1007.7 1002.9 1002.4 1007.0 1017.4 1020.8 1026.1 1031.7 1032.1 DAY 30 1 1 4 1 2 31 14 21 28 21 18 MIN. QFF PRESSURE IN HPA 1018.1 1004.7 1000.2 1001.6 996.8 992.1 990.5 996.3 998.3 1009.8 1014.1 1019.1 990.5 DAY 20 21 26 17 30 29 12 27 1 1 1 6 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 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.4 11.6 18.6 23.8 30.2 33.7 33.3 33.6 29.2 24.5 15.1 8.8 22.6 MINIMUN AIR TEMPERATURE (C) 2.3 3.8 9.1 14.7 19.2 22.9 25.6 24.8 18.1 13.7 6.5 1.0 13.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 3 7 26 30 27 6 1 0 0 100 DAYS WITH MINIMUM TEMP. <=-4 1 0 0 0 0 0 0 0 0 0 0 4 5 DAYS WITH FREEZING MIN.<= 0 12 10 0 0 0 0 0 0 0 0 0 12 34 TEMPERATURE RECORDS LOWEST(C) -4.6 -3.4 1.6 6.4 15.4 19.8 19.4 14.4 12.6 8.2 1.2 -6.6 -6.6 DAY 20 2 9 5 19 9 23 15 29 21 25 6 MAXIMUM AIR TEMPERATURE (C) 14.1 16.5 23.9 28.5 35.3 38.6 37.6 38.2 34.7 30.4 20.6 14.1 27.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 13 31 30 31 31 30 17 0 0 183 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.0 23.8 29.8 36.0 39.6 42.0 41.6 40.6 38.4 34.2 27.2 21.2 42.0 DAY 9 27 28 29 31 21 1 10 1 6 1 12 DIF. BETWEEN (MAX.-MIN.) (C) 11.8 12.7 14.8 13.8 16.1 15.7 12.0 13.4 16.6 16.7 14.1 13.1 14.2 MEAN DAILY TEMP. (MDT) (C) 8.2 10.2 16.5 21.6 27.2 30.8 31.6 31.5 26.4 22.0 13.5 7.6 20.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 4.5 59.4 192.9 293.1 328.7 325.3 161.7 51.4 0.0 0.0 1417.0 HEATING DEG. DAYS(BASE 18 0C) 302.7 219.7 77.6 12.0 0.0 0.0 0.0 0.0 0.0 0.4 134.9 323.8 1071.1 DEWPOINT (MEAN C) -2.1 -3.6 -4.4 1.3 1.7 2.1 3.0 1.8 -2.9 -0.5 -1.0 -6.4 -0.9 MIXING RATIO (G/KG) 4.11 3.88 3.35 4.96 5.04 5.19 5.53 5.13 3.64 4.26 4.36 3.05 4.38 VAPOUR PRESSURE (HPA) 5.80 5.47 4.72 6.95 7.05 7.24 7.72 7.16 5.12 6.01 6.16 4.31 6.14 SATURATION DEF. (HPA) 6.71 8.93 18.09 24.22 37.45 46.72 44.47 46.32 37.10 26.44 11.98 7.70 26.34 RELATIVE HUMIDITY (MEAN %) 50 41 24 27 18 15 16 14 14 21 38 39 26 RELATIVE HUMIDITY (MAX. %) 74 64 44 47 31 24 22 23 23 38 60 60 43 RELATIVE HUMIDITY (MIN. %) 34 27 13 18 12 10 12 11 9 13 24 25 17 RELATIVE HUMIDITY (MEAN% 03UTC) 74 63 43 47 31 24 22 23 23 38 58 58 42 RELATIVE HUMIDITY (MEAN% 09UTC) 38 31 16 19 14 12 13 12 10 14 26 29 20 RELATIVE HUMIDITY (MEAN% 15UTC) 45 40 20 22 14 13 14 13 13 19 37 38 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.8 34.1 3.0 15.6 0.0 0.0 0.0 0.0 0.0 0.0 3.2 21.0 87.7 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 0 0 1 2 DAYS WITH PRECIPITATION >= 5 1 3 0 2 0 0 0 0 0 0 0 1 7 DAYS WITH PRECIPITATION >= 1 3 5 2 2 0 0 0 0 0 0 1 1 14 DAYS WITH PRECIPITATION 8 7 2 2 0 0 0 0 0 0 5 1 25 GREATEST DAILY PRECIPITATION 6.0 15.0 2.0 9.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0 21.0 21.0 DAY 11 16 22 4 ** ** ** ** ** ** 8 23 DAY WITH THUNDER STORM 4 2 0 1 0 0 0 0 0 0 0 1 8 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 1 1 7 1 0 0 4 0 0 0 0 14 WIND DIRECTION (PREVAILING) 135 270 270 270 135 45 360 360 45 45 135 135 45 PREVAILING WIND SPEED(KNOTS) 6.9 7.9 8.2 10.3 7.2 8.8 12.4 11.7 8.7 7.3 6.0 5.6 9.2 PREVAILING WIND PERCENT 12.3 13.6 14.8 18.0 18.7 16.0 47.1 31.0 24.7 10.3 6.7 10.3 10.2 CALMS PERCENT OF WIND 63.2 60.0 56.8 46.7 39.4 35.3 11.0 28.4 40.0 63.2 76.7 68.4 49.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 183 224 229 245 187 60 20 23 27 35 181 193 18 VECTOR WIND MAGNITUDE(KNOTS) 1.0 1.1 1.5 2.8 1.4 1.2 8.0 6.5 4.5 1.1 0.6 0.9 1.1 WIND STEADINESES (MEAN %) 40.0 36.7 50.0 58.3 29.8 24.0 82.5 86.7 84.9 40.7 42.9 47.4 25.6 WIND SPEED (MEAN KNOTS) 2.5 3.0 3.0 4.8 4.7 5.0 9.7 7.5 5.3 2.7 1.4 1.9 4.3 FASTEST WIND DIRECTION 240 280 300 240 290 60 10 30 10 360 330 320 240 FASTEST WIND SPEED (KNOTS) 12 16 16 23 17 19 23 23 21 16 12 12 23 DAY 3 1 23 4 26 25 21 13 14 10 4 14 DAYS WITH SKY CLEAR (0-2)/8 19 15 21 17 25 28 27 31 30 29 18 21 281 DAYS WITH P.CLOUDY (3-6)/8 9 9 9 8 5 2 4 0 0 2 10 9 67 DAYS WITH CLOUDY (7-8)/8 3 4 1 5 1 0 0 0 0 0 2 1 17 DAYS WITH VISIBILITY =< 2 KM 0 0 0 1 0 0 0 0 0 0 0 0 1 DURATION OF SUNSHINE HOURS 226.2 211.1 282.3 255.3 344.5 335.0 356.5 355.2 327.4 303.5 225.9 226.7 3449.6 ======================================================================================================================= 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 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 884.6 884.3 882.3 879.4 878.1 875.4 875.3 874.9 880.5 883.7 886.0 884.8 880.8 MAX. QFE PRESSURE IN HPA 890.0 892.5 891.9 888.7 884.7 880.7 879.6 880.7 885.0 888.1 893.3 892.4 893.3 DAY-HOUR 25- 6 2- 6 11- 6 1- 6 10- 6 6- 3 3- 6 31- 6 21- 3 9- 6 18- 6 4- 6 MIN. QFE PRESSURE IN HPA 877.1 878.2 875.2 866.7 871.7 867.3 870.4 870.1 875.8 880.0 880.6 874.1 866.7 DAY-HOUR 22-12 28-12 29-15 4- 9 13-12 21-15 25-12 8-15 17-12 12-12 13-12 22-12 MEAN QNH PRESSURE IN HPA 1022.6 1022.3 1020.1 1016.8 1015.3 1012.3 1012.2 1011.7 1018.0 1021.7 1024.2 1022.9 1018.3 MAX. QNH PRESSURE IN HPA 1028.7 1031.6 1030.9 1027.3 1022.8 1018.3 1017.0 1018.3 1023.1 1026.6 1032.5 1031.4 1032.5 DAY-HOUR 25- 6 2- 6 11- 6 1- 6 10- 6 6- 3 3- 6 31- 6 21- 3 9- 6 18- 6 4- 6 MIN. QNH PRESSURE IN HPA 1014.2 1015.5 1012.1 1002.5 1008.2 1003.2 1006.7 1006.4 1012.8 1017.5 1018.2 1010.9 1002.5 DAY-HOUR 22-12 28-12 29-15 4- 9 13-12 21-15 25-12 8-15 17-12 12-12 13-12 22-12 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 885.0 884.5 882.9 880.4 879.3 876.5 876.1 875.6 881.2 884.5 886.5 885.1 881.5 MAX. QFE PRESSURE IN HPA 888.5 891.0 890.9 887.5 884.5 880.7 879.5 879.8 885.0 887.2 892.6 891.8 892.6 DAY 25 2 13 1 10 6 3 30 21 9 18 4 MIN. QFE PRESSURE IN HPA 879.3 878.9 876.3 872.2 874.5 869.7 873.4 871.7 878.3 882.2 882.4 876.5 869.7 DAY 22 28 23 4 13 21 26 10 10 12 13 22 MEAN QNH PRESSURE IN HPA 1023.1 1022.6 1020.8 1018.0 1016.7 1013.6 1013.1 1012.6 1018.9 1022.5 1024.7 1023.2 1019.1 MAX. QNH PRESSURE IN HPA 1027.1 1029.9 1029.8 1025.9 1022.6 1018.3 1016.9 1017.3 1023.1 1025.6 1031.7 1030.8 1031.7 DAY 25 2 13 1 10 6 3 30 21 9 18 4 MIN. QNH PRESSURE IN HPA 1016.7 1016.3 1013.3 1008.7 1011.3 1005.9 1010.1 1008.2 1015.6 1020.0 1020.2 1013.6 1005.9 DAY 22 28 23 4 13 21 26 10 10 12 13 22 MEAN QFF PRESSURE IN HPA 1023.5 1022.0 1016.8 1011.1 1007.0 1002.3 1001.4 1001.2 1010.1 1016.1 1022.6 1024.4 1013.2 MAX. QFF PRESSURE IN HPA 1029.9 1032.8 1027.9 1022.0 1013.6 1008.4 1005.5 1006.1 1015.5 1019.0 1030.2 1034.6 1034.6 DAY 27 2 13 1 10 25 3 30 29 26 19 5 MIN. QFF PRESSURE IN HPA 1015.4 1010.9 1006.8 1001.4 1000.0 992.0 997.1 995.0 1006.2 1010.6 1015.7 1013.2 992.0 DAY 12 28 29 4 13 21 26 10 14 12 14 22 ======================================================================================================================= 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 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 886.2 885.9 884.0 880.9 879.8 876.8 876.5 876.1 881.8 885.4 887.6 886.5 882.3 MAX. QFE PRESSURE IN HPA 890.0 892.5 891.9 888.7 884.7 880.7 879.6 880.7 885.0 888.1 893.3 892.4 893.3 DAY 25 2 11 1 10 6 3 31 21 9 18 4 MIN. QFE PRESSURE IN HPA 880.1 880.1 878.3 870.7 875.4 869.8 874.0 872.2 878.4 883.0 883.3 878.2 869.8 DAY 22 28 23 4 13 21 25 10 10 12 13 22 MEAN QNH PRESSURE IN HPA 1024.5 1024.1 1022.0 1018.5 1017.2 1013.8 1013.6 1013.1 1019.5 1023.6 1026.0 1024.8 1020.1 MAX. QNH PRESSURE IN HPA 1028.7 1031.6 1030.9 1027.3 1022.8 1018.3 1017.0 1018.3 1023.1 1026.6 1032.5 1031.4 1032.5 DAY 25 2 11 1 10 6 3 31 21 9 18 4 MIN. QNH PRESSURE IN HPA 1017.6 1017.6 1015.6 1007.0 1012.3 1006.0 1010.7 1008.7 1015.7 1020.9 1021.2 1015.5 1006.0 DAY 22 28 23 4 13 21 25 10 10 12 13 22 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 884.1 884.3 882.5 879.5 878.2 875.6 875.5 875.1 880.4 883.6 885.7 884.5 880.7 MAX. QFE PRESSURE IN HPA 888.3 890.9 890.3 887.6 882.8 879.8 878.3 879.8 883.8 886.2 891.3 890.5 891.3 DAY 27 2 11 1 10 25 3 29 21 10 18 5 MIN. QFE PRESSURE IN HPA 877.9 879.0 877.3 866.7 873.7 868.5 872.1 871.0 877.4 881.1 881.3 875.6 866.7 DAY 22 28 29 4 13 21 25 10 10 12 13 22 MEAN QNH PRESSURE IN HPA 1022.1 1022.3 1020.3 1016.9 1015.5 1012.5 1012.5 1011.9 1018.0 1021.5 1023.9 1022.5 1018.3 MAX. QNH PRESSURE IN HPA 1026.8 1029.8 1029.1 1026.0 1020.6 1017.3 1015.6 1017.3 1021.8 1024.5 1030.2 1029.3 1030.2 DAY 27 2 11 1 10 25 3 29 21 10 18 5 MIN. QNH PRESSURE IN HPA 1015.1 1016.4 1014.5 1002.5 1010.4 1004.6 1008.6 1007.4 1014.6 1018.7 1019.0 1012.5 1002.5 DAY 22 28 29 4 13 21 25 10 10 12 13 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 883.3 883.0 880.8 878.0 876.4 873.9 874.1 873.6 879.2 882.3 884.7 883.6 879.4 MAX. QFE PRESSURE IN HPA 886.8 889.6 888.4 885.5 880.9 878.1 876.4 877.6 882.7 885.1 890.3 889.6 890.3 DAY 27 2 12 1 10 25 4 29 21 10 18 4 MIN. QFE PRESSURE IN HPA 877.1 878.2 875.7 869.6 871.7 867.5 870.4 870.5 875.8 880.0 880.6 874.1 867.5 DAY 22 28 29 4 13 21 25 8 17 12 13 22 MEAN QNH PRESSURE IN HPA 1021.2 1020.8 1018.4 1015.2 1013.5 1010.6 1010.8 1010.3 1016.5 1020.1 1022.8 1021.6 1016.8 MAX. QNH PRESSURE IN HPA 1025.1 1028.3 1026.9 1023.7 1018.5 1015.4 1013.4 1014.8 1020.5 1023.2 1029.1 1028.3 1029.1 DAY 27 2 12 1 10 25 4 29 21 10 18 4 MIN. QNH PRESSURE IN HPA 1014.2 1015.5 1012.7 1005.8 1008.2 1003.4 1006.7 1006.8 1012.8 1017.5 1018.2 1010.9 1003.4 DAY 22 28 29 4 13 21 25 8 17 12 13 22 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 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 884.4 884.0 881.3 878.2 876.7 874.0 874.3 874.1 879.8 883.1 885.5 884.5 880.0 MAX. QFE PRESSURE IN HPA 888.4 890.7 889.0 886.0 881.3 878.4 876.9 878.4 883.3 885.7 890.7 890.4 890.7 DAY 26 2 12 1 9 5 3 29 29 10 18 4 MIN. QFE PRESSURE IN HPA 879.0 879.5 875.2 870.6 871.9 867.3 870.8 870.1 876.7 880.7 881.6 875.0 867.3 DAY 22 28 29 4 13 21 25 8 10 28 13 22 MEAN QNH PRESSURE IN HPA 1022.4 1022.0 1019.0 1015.5 1013.8 1010.8 1011.1 1010.8 1017.2 1020.9 1023.6 1022.6 1017.5 MAX. QNH PRESSURE IN HPA 1026.9 1029.5 1027.6 1024.2 1019.0 1015.7 1014.0 1015.7 1021.2 1023.9 1029.5 1029.2 1029.5 DAY 26 2 12 1 9 5 3 29 29 10 18 4 MIN. QNH PRESSURE IN HPA 1016.4 1016.9 1012.1 1006.9 1008.4 1003.2 1007.1 1006.4 1013.8 1018.3 1019.3 1011.9 1003.2 DAY 22 28 29 4 13 21 25 8 10 28 13 22 MEAN QFF PRESSURE IN HPA 1022.8 1021.3 1015.0 1008.6 1004.1 999.4 999.5 999.4 1008.5 1014.5 1021.5 1023.8 1011.5 MAX. QFF PRESSURE IN HPA 1029.7 1032.0 1025.9 1019.7 1010.7 1005.3 1003.4 1004.6 1014.6 1018.2 1028.7 1033.4 1033.4 DAY 26 2 12 1 15 25 3 29 29 31 18 5 MIN. QFF PRESSURE IN HPA 1014.3 1012.3 1004.2 999.9 997.2 989.3 995.2 993.7 1004.6 1009.5 1015.3 1012.5 989.3 DAY 12 28 29 21 13 21 25 9 17 12 14 22 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 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.3 12.6 16.7 24.6 26.6 33.0 35.4 32.4 27.9 23.6 14.3 9.4 22.1 MINIMUN AIR TEMPERATURE (C) 2.2 5.2 8.5 14.8 16.7 22.9 26.3 24.8 17.7 12.1 4.6 1.3 13.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 4 21 31 29 6 0 0 0 93 DAYS WITH MINIMUM TEMP. <=-4 2 0 0 0 0 0 0 0 0 0 0 6 8 DAYS WITH FREEZING MIN.<= 0 5 2 2 0 0 0 0 0 0 0 9 11 29 TEMPERATURE RECORDS LOWEST(C) -4.4 -1.8 -3.8 4.6 7.2 17.8 21.2 19.2 7.0 8.4 -2.2 -7.4 -7.4 DAY 3 19 3 19 2 8 6 21 29 13 24 15 MAXIMUM AIR TEMPERATURE (C) 13.9 17.4 21.4 29.7 31.4 38.0 39.9 36.7 33.6 29.9 20.3 14.7 27.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 14 24 30 31 31 26 10 2 0 168 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 24.2 27.4 36.4 35.2 40.2 44.0 43.6 37.6 35.4 30.2 23.0 44.0 DAY 11 26 20 28 23 4 3 1 14 4 1 7 DIF. BETWEEN (MAX.-MIN.) (C) 11.7 12.2 12.9 14.9 14.7 15.1 13.6 11.9 15.9 17.8 15.7 13.4 14.2 MEAN DAILY TEMP. (MDT) (C) 8.1 11.3 15.0 22.2 24.1 30.4 33.1 30.8 25.6 21.0 12.4 8.0 20.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 70.8 107.4 283.3 375.8 303.3 148.7 24.5 3.9 0.0 1317.7 HEATING DEG. DAYS(BASE 18 0C) 308.0 187.2 111.1 10.5 3.7 0.0 0.0 0.0 1.3 0.0 182.7 309.1 1113.6 DEWPOINT (MEAN C) -2.5 -1.6 -2.9 0.9 -0.4 2.4 3.7 2.5 -0.6 -3.5 -6.3 -7.5 -1.3 MIXING RATIO (G/KG) 3.86 4.15 3.95 4.82 4.45 5.32 5.97 5.38 4.37 3.54 2.98 2.81 4.30 VAPOUR PRESSURE (HPA) 5.45 5.83 5.54 6.77 6.24 7.42 8.29 7.50 6.12 5.00 4.21 3.98 6.03 SATURATION DEF. (HPA) 6.76 9.62 14.72 25.95 29.90 44.30 50.55 42.11 33.38 25.91 13.60 8.71 25.46 RELATIVE HUMIDITY (MEAN %) 50 43 30 24 19 16 15 16 17 18 27 34 26 RELATIVE HUMIDITY (MAX. %) 73 74 51 43 31 26 24 23 30 32 45 52 42 RELATIVE HUMIDITY (MIN. %) 35 25 19 15 12 11 11 12 11 11 15 22 17 RELATIVE HUMIDITY (MEAN% 03UTC) 73 74 50 43 31 26 24 23 30 32 45 50 42 RELATIVE HUMIDITY (MEAN% 09UTC) 38 30 22 17 14 12 12 13 12 12 18 24 19 RELATIVE HUMIDITY (MEAN% 15UTC) 48 38 25 21 17 14 13 15 15 17 26 35 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 24.5 13.2 9.9 2.2 0.2 0.0 0.0 0.0 0.0 0.0 0.0 1.8 51.8 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 3 1 1 0 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 1 4 3 2 1 0 0 0 0 0 0 0 0 10 DAYS WITH PRECIPITATION 6 5 4 3 2 0 0 1 0 0 1 5 27 GREATEST DAILY PRECIPITATION 9.0 10.0 8.0 2.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.8 10.0 DAY 24 6 14 18 30 ** ** ** ** ** ** 3 DAY WITH THUNDER STORM 0 2 1 1 4 0 0 1 0 0 0 0 9 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 3 5 1 1 2 3 1 0 0 0 1 18 WIND DIRECTION (PREVAILING) 135 270 225 270 135 45 360 360 45 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 6.6 8.7 9.0 7.7 7.3 9.6 14.8 13.1 9.5 7.2 6.2 6.1 6.8 PREVAILING WIND PERCENT 11.0 12.9 18.7 13.3 12.3 22.7 26.5 51.6 13.3 15.5 12.7 12.3 10.7 CALMS PERCENT OF WIND 65.8 57.1 40.0 48.0 38.1 30.7 26.5 9.7 49.3 60.0 60.7 67.7 46.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 182 235 233 225 4 39 30 18 50 161 204 188 26 VECTOR WIND MAGNITUDE(KNOTS) 1.0 1.4 2.7 1.4 0.7 3.5 6.4 9.9 2.7 1.3 1.2 1.0 1.1 WIND STEADINESES (MEAN %) 45.5 42.4 54.0 37.8 13.7 55.6 75.3 90.8 57.4 50.0 44.4 47.6 22.9 WIND SPEED (MEAN KNOTS) 2.2 3.3 5.0 3.7 5.1 6.3 8.5 10.9 4.7 2.6 2.7 2.1 4.8 FASTEST WIND DIRECTION 140 220 310 300 310 340 10 20 30 150 320 230 10 FASTEST WIND SPEED (KNOTS) 12 19 21 19 21 23 29 23 23 12 17 14 29 DAY 4 26 14 18 9 16 17 4 16 13 15 7 DAYS WITH SKY CLEAR (0-2)/8 17 18 13 15 20 28 29 31 30 31 25 21 278 DAYS WITH P.CLOUDY (3-6)/8 9 8 12 13 11 2 2 0 0 0 5 8 70 DAYS WITH CLOUDY (7-8)/8 5 2 6 2 0 0 0 0 0 0 0 2 17 DAYS WITH VISIBILITY =< 2 KM 2 2 3 1 0 0 1 0 0 0 0 0 9 DURATION OF SUNSHINE HOURS 200.1 220.5 232.6 266.8 306.5 339.8 353.2 355.6 327.2 309.9 264.8 219.9 3396.9 ======================================================================================================================= 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 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 885.1 881.1 881.8 881.1 880.2 875.2 872.6 875.9 879.3 883.9 886.1 887.1 880.8 MAX. QFE PRESSURE IN HPA 892.0 889.0 893.6 888.1 886.3 881.7 876.9 879.0 886.9 888.5 895.8 893.9 895.8 DAY-HOUR 12- 6 7- 6 3- 6 7- 6 2- 6 1- 6 3- 3 29- 6 26- 6 30- 6 25- 6 14- 6 MIN. QFE PRESSURE IN HPA 877.5 873.6 875.0 874.5 874.3 869.0 868.0 869.9 873.4 878.7 878.0 881.2 868.0 DAY-HOUR 29- 3 16-12 13-12 17-15 24-12 30-12 25-15 1-12 10-12 6-12 14-12 11-12 MEAN QNH PRESSURE IN HPA 1023.2 1018.7 1019.5 1018.7 1017.7 1012.1 1009.2 1012.9 1016.7 1021.8 1024.3 1025.5 1018.3 MAX. QNH PRESSURE IN HPA 1031.0 1027.6 1032.8 1026.6 1024.6 1019.4 1014.0 1016.4 1025.3 1027.1 1035.3 1033.1 1035.3 DAY-HOUR 12- 6 7- 6 3- 6 7- 6 2- 6 1- 6 3- 3 29- 6 26- 6 30- 6 25- 6 14- 6 MIN. QNH PRESSURE IN HPA 1014.7 1010.3 1011.9 1011.3 1011.1 1005.1 1004.0 1006.1 1010.1 1016.0 1015.2 1018.8 1004.0 DAY-HOUR 29- 3 16-12 13-12 17-15 24-12 30-12 25-15 1-12 10-12 6-12 14-12 11-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 885.2 881.4 882.0 881.9 881.1 876.2 873.4 876.6 880.2 884.6 886.7 887.3 881.4 MAX. QFE PRESSURE IN HPA 890.2 888.0 892.3 887.2 885.5 881.4 876.9 878.7 886.0 888.0 894.4 892.5 894.4 DAY 12 7 3 7 3 1 3 5 27 30 25 13 MIN. QFE PRESSURE IN HPA 877.5 875.7 875.5 876.4 875.6 870.7 870.2 872.4 876.6 879.9 879.9 882.9 870.2 DAY 29 16 14 18 24 30 25 1 7 6 15 11 MEAN QNH PRESSURE IN HPA 1023.3 1019.0 1019.7 1019.6 1018.7 1013.2 1010.1 1013.6 1017.8 1022.7 1025.0 1025.8 1019.0 MAX. QNH PRESSURE IN HPA 1029.0 1026.5 1031.3 1025.6 1023.7 1019.1 1014.0 1016.0 1024.2 1026.5 1033.7 1031.6 1033.7 DAY 12 7 3 7 3 1 3 5 27 30 25 13 MIN. QNH PRESSURE IN HPA 1014.7 1012.7 1012.4 1013.4 1012.5 1007.0 1006.5 1008.9 1013.7 1017.4 1017.4 1020.8 1006.5 DAY 29 16 14 18 24 30 25 1 7 6 15 11 MEAN QFF PRESSURE IN HPA 1023.8 1017.6 1016.4 1012.6 1010.6 1002.1 997.8 1002.4 1009.4 1017.0 1023.8 1026.7 1013.3 MAX. QFF PRESSURE IN HPA 1030.5 1027.6 1035.0 1019.2 1019.4 1009.0 1001.2 1005.7 1018.3 1021.0 1035.6 1037.7 1037.7 DAY 3 7 3 19 3 1 6 5 27 17 25 14 MIN. QFF PRESSURE IN HPA 1013.8 1007.9 1006.1 1006.1 1001.8 995.7 994.5 995.5 1003.5 1008.9 1012.5 1017.4 994.5 DAY 29 27 14 14 24 30 9 1 6 6 3 7 ======================================================================================================================= 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 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 886.7 882.7 883.4 882.8 881.7 876.5 873.7 877.1 880.9 885.5 887.7 888.7 882.3 MAX. QFE PRESSURE IN HPA 892.0 889.0 893.6 888.1 886.3 881.7 876.7 879.0 886.9 888.5 895.8 893.9 895.8 DAY 12 7 3 7 2 1 3 29 26 30 25 14 MIN. QFE PRESSURE IN HPA 879.5 876.3 878.3 877.6 876.4 870.9 870.6 872.8 877.1 881.3 881.3 883.9 870.6 DAY 29 16 27 18 30 30 25 1 6 6 15 7 MEAN QNH PRESSURE IN HPA 1025.0 1020.5 1021.3 1020.6 1019.4 1013.6 1010.4 1014.3 1018.5 1023.7 1026.2 1027.3 1020.1 MAX. QNH PRESSURE IN HPA 1031.0 1027.6 1032.8 1026.6 1024.6 1019.4 1013.8 1016.4 1025.3 1027.1 1035.3 1033.1 1035.3 DAY 12 7 3 7 2 1 3 29 26 30 25 14 MIN. QNH PRESSURE IN HPA 1016.9 1013.3 1015.6 1014.8 1013.4 1007.3 1006.9 1009.4 1014.2 1019.0 1019.0 1021.9 1006.9 DAY 29 16 27 18 30 30 25 1 6 6 15 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 884.9 881.2 882.0 881.4 880.4 875.4 872.9 876.0 879.4 883.7 885.7 886.6 880.8 MAX. QFE PRESSURE IN HPA 889.7 887.1 891.9 887.2 885.5 880.4 875.8 878.0 885.7 886.3 894.1 892.4 894.1 DAY 12 13 3 7 2 1 3 4 26 30 25 13 MIN. QFE PRESSURE IN HPA 878.9 874.6 877.0 877.7 875.6 870.3 869.5 871.2 875.3 880.0 879.4 881.8 869.5 DAY 29 16 13 14 24 30 25 1 6 6 14 7 MEAN QNH PRESSURE IN HPA 1023.0 1018.8 1019.8 1019.1 1017.9 1012.3 1009.5 1013.0 1016.8 1021.6 1023.9 1025.0 1018.4 MAX. QNH PRESSURE IN HPA 1028.4 1025.5 1030.9 1025.6 1023.7 1017.9 1012.8 1015.2 1023.9 1024.6 1033.4 1031.4 1033.4 DAY 12 13 3 7 2 1 3 4 26 30 25 13 MIN. QNH PRESSURE IN HPA 1016.3 1011.4 1014.1 1014.9 1012.5 1006.6 1005.7 1007.6 1012.2 1017.5 1016.8 1019.5 1005.7 DAY 29 16 13 14 24 30 25 1 6 6 14 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 884.0 879.8 880.5 879.5 878.7 873.9 871.6 874.8 877.9 882.4 884.7 885.9 879.5 MAX. QFE PRESSURE IN HPA 888.4 885.4 889.8 885.5 884.3 878.6 874.3 877.1 884.2 884.9 893.2 891.4 893.2 DAY 12 7 3 7 2 1 3 4 26 30 25 13 MIN. QFE PRESSURE IN HPA 878.9 873.6 875.0 874.7 874.3 869.0 868.6 869.9 873.4 878.7 878.0 881.2 868.6 DAY 29 16 13 17 24 30 25 1 10 6 14 11 MEAN QNH PRESSURE IN HPA 1021.9 1017.3 1018.1 1016.9 1016.1 1010.6 1008.1 1011.6 1015.2 1020.2 1022.7 1024.1 1016.9 MAX. QNH PRESSURE IN HPA 1026.9 1023.6 1028.5 1023.7 1022.3 1015.9 1011.1 1014.2 1022.2 1023.0 1032.3 1030.3 1032.3 DAY 12 7 3 7 2 1 3 4 26 30 25 13 MIN. QNH PRESSURE IN HPA 1016.3 1010.3 1011.9 1011.5 1011.1 1005.1 1004.7 1006.1 1010.1 1016.0 1015.2 1018.8 1004.7 DAY 29 16 13 17 24 30 25 1 10 6 14 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION 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 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 884.8 880.4 881.0 879.8 879.0 873.9 871.5 875.0 878.4 883.2 885.7 886.9 879.9 MAX. QFE PRESSURE IN HPA 889.5 886.4 889.7 885.9 884.1 878.0 874.0 877.6 884.6 885.8 893.5 891.8 893.5 DAY 12 2 3 7 2 1 3 4 26 17 24 13 MIN. QFE PRESSURE IN HPA 880.0 874.7 875.2 874.5 874.8 869.3 868.0 871.0 873.6 878.9 879.1 882.1 868.0 DAY 28 16 13 17 24 30 25 1 10 5 14 7 MEAN QNH PRESSURE IN HPA 1022.8 1017.9 1018.6 1017.2 1016.4 1010.6 1007.9 1011.9 1015.7 1021.0 1023.9 1025.2 1017.4 MAX. QNH PRESSURE IN HPA 1028.2 1024.7 1028.4 1024.1 1022.1 1015.2 1010.7 1014.8 1022.7 1024.0 1032.7 1030.8 1032.7 DAY 12 2 3 7 2 1 3 4 26 17 24 13 MIN. QNH PRESSURE IN HPA 1017.5 1011.5 1012.1 1011.3 1011.6 1005.5 1004.0 1007.4 1010.3 1016.3 1016.5 1019.9 1004.0 DAY 28 16 13 17 24 30 25 1 10 5 14 7 MEAN QFF PRESSURE IN HPA 1023.3 1016.5 1015.2 1010.2 1008.2 999.5 995.6 1000.7 1007.3 1015.3 1022.7 1026.2 1011.7 MAX. QFF PRESSURE IN HPA 1031.1 1025.5 1031.7 1016.5 1018.5 1006.3 998.7 1004.3 1016.6 1019.7 1034.7 1036.7 1036.7 DAY 3 2 3 7 2 8 5 4 26 17 24 13 MIN. QFF PRESSURE IN HPA 1016.7 1006.3 1005.2 1003.2 1001.2 994.2 992.3 994.3 1000.4 1008.1 1011.6 1015.5 992.3 DAY 17 26 13 13 24 20 24 1 10 5 3 7 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.5 10.1 14.9 22.4 28.4 32.5 33.7 32.1 28.1 22.2 15.4 10.1 21.5 MINIMUN AIR TEMPERATURE (C) 0.7 2.9 7.1 13.4 18.1 23.1 25.8 23.9 17.4 11.2 5.9 2.3 12.7 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.0 1.1 6.5 23.3 30.1 24.9 5.0 0.1 0.0 0.0 91.0 DAYS WITH MINIMUM TEMP. <=-4 3.1 1.5 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 2.2 7.1 DAYS WITH FREEZING MIN.<= 0 14.3 7.8 1.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 2.0 9.7 35.0 TEMPERATURE RECORDS LOWEST(C) -12.4 -6.6 -4.4 1.0 4.2 14.8 17.8 13.6 7.0 0.0 -4.8 -10.2 -12.4 YEAR-DAY 96-15 89- 7 92-13 94- 6 89- 2 87- 2 86-26 96-31 3-29 87-17 87-30 86-13 96-15 MAXIMUM AIR TEMPERATURE (C) 12.5 15.3 19.6 27.6 33.5 37.4 38.2 37.1 34.1 28.4 21.6 15.5 26.7 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.2 10.4 25.8 29.8 30.9 31.0 27.3 10.2 0.1 0.0 165.7 DAYS WITH MAXIMUM TEMP. <= 0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.3 TEMPERATURE RECORDS HIGHEST(C) 23.6 25.4 31.8 36.6 41.4 43.8 45.0 43.6 41.6 36.6 30.2 28.8 45.0 YEAR-DAY 87-27 97-23 98-31 87-27 0-28 99-30 98- 9 3- 1 1- 1 98- 2 3- 1 98-12 98- 9 DIF. BETWEEN (MAX.-MIN.) (C) 11.8 12.4 12.5 14.2 15.4 14.3 12.4 13.2 16.7 17.2 15.7 13.2 14.0 MEAN DAILY TEMP. (MDT) (C) 6.6 9.1 13.4 20.5 25.8 30.2 32.0 30.5 25.8 19.8 13.8 8.9 19.7 STANDARD DEVIATION OF MDT(C) 1.27 1.42 1.87 1.62 1.68 0.68 0.96 0.94 1.14 1.39 1.22 1.63 1.32 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.8 41.6 154.9 277.5 338.1 293.6 145.9 24.0 0.3 0.0 1276.7 HEATING DEG. DAYS(BASE 18 0C) 352.5 251.6 146.1 21.3 1.4 0.0 0.0 0.0 0.4 18.1 130.9 282.2 1204.5 DEWPOINT (MEAN C) -2.8 -2.4 -0.2 2.1 2.5 3.2 3.6 1.2 -1.0 -1.7 -2.7 -2.6 -0.1 MIXING RATIO (G/KG) 3.81 3.98 4.70 5.36 5.48 5.79 5.92 4.95 4.32 4.03 3.83 3.91 4.67 VAPOUR PRESSURE (HPA) 5.37 5.61 6.60 7.51 7.66 8.07 8.23 6.91 6.06 5.68 5.41 5.52 6.55 SATURATION DEF. (HPA) 5.63 7.53 11.48 21.37 32.88 42.54 45.47 42.64 34.28 22.85 13.47 7.63 23.98 RELATIVE HUMIDITY (MEAN %) 54 47 42 31 21 17 16 15 16 22 32 46 30 RELATIVE HUMIDITY (MAX. %) 76 73 65 50 34 26 23 21 25 33 48 66 45 RELATIVE HUMIDITY (MIN. %) 37 31 29 20 15 13 12 11 12 16 22 32 21 RELATIVE HUMIDITY (MEAN% 03UTC) 74 71 64 49 34 25 22 21 25 33 47 64 44 RELATIVE HUMIDITY (MEAN% 09UTC) 43 36 33 23 17 14 14 13 13 18 25 36 24 RELATIVE HUMIDITY (MEAN% 15UTC) 50 40 37 26 18 15 15 14 15 20 30 44 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 29.8 29.1 39.1 11.8 2.8 0.7 0.5 0.0 0.3 0.6 3.2 17.5 135.4 DAYS WITH PRECIPITATION >=10 1.0 0.8 1.3 0.3 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.6 4.2 DAYS WITH PRECIPITATION >= 5 2.1 1.8 2.5 0.9 0.2 0.1 0.1 0.0 0.0 0.0 0.3 1.3 9.3 DAYS WITH PRECIPITATION >= 1 4.3 3.6 5.3 1.8 0.8 0.1 0.2 0.0 0.1 0.3 0.7 2.6 19.8 DAYS WITH PRECIPITATION 7.1 6.0 7.6 4.2 2.4 0.7 0.3 0.1 0.4 0.6 2.1 4.6 36.1 GREATEST DAILY PRECIPITATION 35.0 65.0 37.0 27.0 10.0 8.5 5.0 0.0 2.0 3.0 12.0 41.0 65.0 YEAR-DAY 91-26 99- 6 97-17 92- 8 91- 5 87- 1 88-28 **-** 99-25 97-24 0-10 95- 6 99 DAY WITH THUNDER STORM 0.8 0.8 1.2 0.9 1.2 0.3 0.1 0.1 0.2 0.3 0.3 0.1 6.3 DAYS WITH SNOW OR SLEET 1.2 0.4 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.0 DAYS WITH DUST 0.8 2.1 2.4 2.1 1.9 1.8 4.8 3.1 0.9 0.6 0.5 0.8 21.8 WIND DIRECTION (PREVAILING) 135 135 135 135 135 360 360 360 360 135 135 135 360 PREVAILING WIND SPEED(KNOTS) 6.7 7.3 7.5 7.7 8.0 15.1 16.9 15.9 14.6 7.6 6.9 6.6 15.4 PREVAILING WIND PERCENT 12.8 15.5 15.5 13.5 13.0 23.2 44.5 42.7 17.4 14.0 13.4 11.8 12.5 CALMS PERCENT OF WIND 61.5 53.8 46.5 43.8 37.2 26.6 13.8 19.9 41.5 55.5 63.7 65.1 44.1 NO. OF WIND OBSERVATION 169.3 153.6 167.6 160.7 158.2 159.5 160.2 164.1 157.8 159.3 157.9 164.2 1932.4 VECTOR WIND DIRECTION (MEAN) 192 197 209 221 48 23 15 14 35 137 185 189 22 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.0 1.2 0.7 1.1 5.4 10.3 9.0 3.4 0.8 1.1 1.0 1.9 WIND STEADINESES (MEAN %) 29.6 27.8 27.3 14.9 18.6 62.8 83.1 83.3 56.7 22.9 42.3 41.7 33.3 WIND SPEED (MEAN KNOTS) 2.7 3.6 4.4 4.7 5.9 8.6 12.4 10.8 6.0 3.5 2.6 2.4 5.7 FASTEST WIND DIRECTION 310 300 310 200 360 330 10 360 360 300 260 300 10 FASTEST WIND SPEED (KNOTS) 29 29 39 35 35 45 47 41 37 33 25 37 47 YEAR-DAY 90-26 88- 4 93-22 98-24 90- 9 86-30 89-21 90-12 86-22 86-26 94-26 88-29 89 DAYS WITH SKY CLEAR (0-2)/8 16.4 14.6 12.7 13.0 19.9 26.4 29.0 30.2 28.4 27.2 20.2 17.3 255.3 DAYS WITH P.CLOUDY (3-6)/8 8.9 8.9 10.8 13.7 9.6 3.4 2.0 0.8 1.6 3.6 8.9 8.9 81.1 DAYS WITH CLOUDY (7-8)/8 5.7 4.8 7.1 3.3 1.4 0.2 0.0 0.0 0.0 0.2 0.9 4.8 28.4 DAYS WITH VISIBILITY =< 2 KM 1.6 1.4 1.2 0.7 0.2 0.2 1.2 0.4 0.2 0.1 0.2 0.9 8.3 DURATION OF SUNSHINE HOURS 212.4 209.9 225.5 264.8 320.2 336.7 362.9 358.6 318.0 291.5 249.9 216.9 3367.3 ======================================================================================================================= 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 CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 884.4 882.7 881.0 880.3 878.7 875.2 873.1 875.1 879.2 884.1 885.7 885.9 880.4 MAX. QFE PRESSURE IN HPA 895.4 895.2 893.6 890.4 887.3 883.2 880.7 881.5 888.6 892.3 896.3 895.2 896.3 YEAR-DAY 88- 3 91-15 3- 3 94- 6 97-12 88- 1 96- 4 93-18 94-23 89-27 96-15 87- 2 96-15 MIN. QFE PRESSURE IN HPA 867.6 868.5 868.3 866.7 867.3 867.3 865.5 868.2 869.4 876.2 874.6 873.5 865.5 YEAR-DAY 98-13 98-13 1-26 2- 4 91-23 2-21 95-16 94- 2 0- 1 87- 9 95-26 94- 4 95-16 MEAN QNH PRESSURE IN HPA 1022.4 1020.5 1018.7 1017.8 1016.0 1012.1 1009.8 1012.0 1016.6 1022.0 1023.9 1024.1 1018.0 MAX. QNH PRESSURE IN HPA 1034.8 1034.6 1032.8 1029.2 1025.7 1021.1 1018.3 1019.2 1027.2 1031.3 1035.8 1034.6 1035.8 YEAR-DAY 88- 3 91-15 3- 3 94- 6 97-12 88- 1 96- 4 93-18 94-23 89-27 96-15 87- 2 96-15 MIN. QNH PRESSURE IN HPA 1003.5 1004.6 1004.3 1002.5 1003.2 1003.2 1001.2 1004.2 1005.6 1013.2 1011.4 1010.2 1001.2 YEAR-DAY 98-13 98-13 1-26 2- 4 91-23 2-21 95-16 94- 2 0- 1 87- 9 95-26 94- 4 95-16 MEAN QFF PRESSURE IN HPA 1024.4 1018.6 1016.3 1011.8 1006.3 1001.0 997.9 1001.3 1008.6 1016.7 1021.1 1021.0 1012.1 MAX. QFF PRESSURE IN HPA 1037.0 1030.5 1033.7 1024.6 1017.3 1008.5 1003.4 1009.6 1021.1 1022.6 1029.7 1031.1 1037.0 YEAR-DAY 92-10 93- 8 92-13 96- 7 93-10 93-23 92- 6 92-31 91-29 91-16 91-29 92-12 92-10 MIN. QFF PRESSURE IN HPA 1011.1 1002.9 1000.8 999.4 994.9 991.3 992.2 994.3 998.5 1009.6 1009.9 1012.3 991.3 YEAR-DAY 92-23 92-11 93-22 92-18 93-29 92-27 92-24 91-14 91- 8 91- 5 92-26 91-16 92-27 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 884.2 881.6 880.3 879.6 878.3 875.3 873.1 875.0 879.2 884.1 885.4 884.0 880.0 MAX. QFE PRESSURE IN HPA 891.3 888.7 889.9 886.7 883.3 879.6 877.0 878.5 884.9 886.3 889.4 889.3 891.3 YEAR-DAY 92-10 93- 8 92-13 93- 1 93-11 92- 2 92- 6 92-15 91-29 91-17 91-14 92-12 92-10 MIN. QFE PRESSURE IN HPA 875.8 873.6 870.7 872.4 872.2 868.3 869.6 871.6 875.0 880.6 879.3 876.9 868.3 YEAR-DAY 93-15 92-12 93-22 92-19 93-30 92-27 92-26 92- 2 91- 8 91- 5 92-27 91-26 92-27 MEAN QNH PRESSURE IN HPA 1022.3 1019.2 1017.8 1017.0 1015.6 1012.2 1009.7 1011.9 1016.6 1022.2 1023.5 1022.0 1017.5 MAX. QNH PRESSURE IN HPA 1030.2 1027.3 1028.6 1025.0 1021.2 1017.0 1014.1 1015.8 1023.0 1024.6 1028.1 1028.0 1030.2 YEAR-DAY 92-10 93- 8 92-13 93- 1 93-11 92- 2 92- 6 92-15 91-29 91-17 91-14 92-12 92-10 MIN. QNH PRESSURE IN HPA 1012.8 1010.3 1007.0 1008.9 1008.7 1004.3 1005.8 1008.0 1011.9 1018.2 1016.7 1014.0 1004.3 YEAR-DAY 93-15 92-12 93-22 92-19 93-30 92-27 92-26 92- 2 91- 8 91- 5 92-27 91-26 92-27 MEAN QFF PRESSURE IN HPA 1023.7 1017.6 1015.2 1010.6 1006.1 1000.9 997.6 1000.9 1007.8 1016.4 1020.3 1020.3 1011.5 MAX. QFF PRESSURE IN HPA 1033.8 1027.7 1030.7 1020.8 1015.6 1007.0 1001.9 1006.4 1018.6 1020.2 1026.0 1028.9 1033.8 YEAR-DAY 92-11 93- 8 92-13 93- 1 93-11 93-24 92- 6 92-15 91-29 91-16 91-29 92-12 92-11 MIN. QFF PRESSURE IN HPA 1012.9 1008.4 1000.8 1001.3 997.5 992.1 994.1 996.5 999.5 1011.3 1011.5 1013.1 992.1 YEAR-DAY 92-24 92-12 93-22 92-19 93-30 92-28 92-26 92- 2 91- 8 91- 5 92-27 91-15 92-28 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 884.6 883.0 881.5 881.0 879.7 876.2 873.9 875.8 880.1 884.8 886.2 886.2 881.1 MAX. QFE PRESSURE IN HPA 893.9 893.5 892.3 890.0 886.3 883.0 880.7 880.7 887.8 891.4 895.4 894.2 895.4 YEAR-DAY 88- 3 91-15 3- 3 94- 6 87- 1 98- 5 96- 4 98-25 94-23 93-17 96-19 87- 2 96-19 MIN. QFE PRESSURE IN HPA 874.0 871.7 870.4 872.2 871.6 869.5 867.1 869.5 871.2 878.2 874.8 873.9 867.1 YEAR-DAY 97-18 98-16 88-24 2- 4 91-23 88-25 95-17 95- 3 0- 1 87- 9 95-26 94- 5 95-17 MEAN QNH PRESSURE IN HPA 1022.7 1020.9 1019.1 1018.7 1017.2 1013.2 1010.6 1012.8 1017.6 1022.9 1024.5 1024.5 1018.7 MAX. QNH PRESSURE IN HPA 1033.1 1032.7 1031.3 1028.7 1024.6 1020.9 1018.3 1018.3 1026.3 1030.3 1034.8 1033.5 1034.8 YEAR-DAY 88- 3 91-15 3- 3 94- 6 87- 1 98- 5 96- 4 98-25 94-23 93-17 96-19 87- 2 96-19 MIN. QNH PRESSURE IN HPA 1010.7 1008.2 1006.7 1008.7 1008.0 1005.7 1003.0 1005.7 1007.6 1015.5 1011.6 1010.6 1003.0 YEAR-DAY 97-18 98-16 88-24 2- 4 91-23 88-25 95-17 95- 3 0- 1 87- 9 95-26 94- 5 95-17 MEAN QFF PRESSURE IN HPA 1023.9 1020.7 1016.5 1012.4 1008.2 1002.1 998.7 1001.8 1009.1 1017.7 1022.4 1024.8 1013.2 MAX. QFF PRESSURE IN HPA 1035.9 1037.9 1035.0 1029.5 1021.1 1011.7 1007.7 1009.7 1020.8 1028.8 1037.7 1038.8 1038.8 YEAR-DAY 88- 3 91-15 3- 3 94- 6 89- 2 87- 2 96- 4 96-31 94-23 93- 9 96-19 87- 2 87- 2 MIN. QFF PRESSURE IN HPA 1007.6 1006.0 1001.0 1000.6 996.9 992.0 988.7 993.1 996.1 1006.3 1007.9 1004.3 988.7 YEAR-DAY 91-26 90-16 1-26 90-16 90-13 2-21 95-17 94- 3 0- 1 95-13 95-26 94- 5 95-17 ======================================================================================================================= 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 CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 886.0 884.3 882.6 881.8 880.2 876.5 874.3 876.3 880.7 885.7 887.3 887.5 881.9 MAX. QFE PRESSURE IN HPA 895.4 895.2 893.6 890.4 887.3 883.2 880.5 881.5 888.6 892.3 896.3 895.2 896.3 YEAR-DAY 88- 3 91-15 3- 3 94- 6 97-12 88- 1 87-29 93-18 94-23 89-27 96-15 87- 2 96-15 MIN. QFE PRESSURE IN HPA 875.2 872.0 871.3 870.7 871.9 869.5 867.3 870.0 871.7 878.8 875.7 877.4 867.3 YEAR-DAY 91-26 90-16 88-24 2- 4 91-23 92-27 95-17 95- 3 0- 1 87- 9 95-26 94- 4 95-17 MEAN QNH PRESSURE IN HPA 1024.3 1022.3 1020.5 1019.6 1017.7 1013.6 1011.1 1013.4 1018.3 1023.9 1025.7 1026.0 1019.7 MAX. QNH PRESSURE IN HPA 1034.8 1034.6 1032.8 1029.2 1025.7 1021.1 1018.1 1019.2 1027.2 1031.3 1035.8 1034.6 1035.8 YEAR-DAY 88- 3 91-15 3- 3 94- 6 97-12 88- 1 87-29 93-18 94-23 89-27 96-15 87- 2 96-15 MIN. QNH PRESSURE IN HPA 1012.1 1008.5 1007.7 1007.0 1008.4 1005.7 1003.2 1006.2 1008.2 1016.1 1012.7 1014.6 1003.2 YEAR-DAY 91-26 90-16 88-24 2- 4 91-23 92-27 95-17 95- 3 0- 1 87- 9 95-26 94- 4 95-17 MEAN QFF PRESSURE IN HPA 1026.6 1020.5 1017.9 1012.9 1007.1 1002.4 999.1 1002.8 1009.9 1018.4 1022.8 1023.0 1013.6 MAX. QFF PRESSURE IN HPA 1037.0 1030.5 1033.5 1022.3 1013.0 1008.5 1002.9 1008.9 1021.1 1021.8 1029.7 1031.1 1037.0 YEAR-DAY 92-10 93- 8 92-13 93- 1 93-12 93-23 92-16 92-31 91-29 91-16 91-29 92-12 92-10 MIN. QFF PRESSURE IN HPA 1016.6 1011.0 1004.9 1001.0 1000.0 992.8 995.7 997.5 1002.1 1012.9 1014.4 1016.2 992.8 YEAR-DAY 92-22 92-26 93-22 92-19 93-29 92-27 92-19 92- 2 91- 8 91- 5 91- 6 91-26 92-27 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 884.2 882.7 881.3 880.5 878.9 875.4 873.4 875.3 879.3 883.8 885.3 885.5 880.5 MAX. QFE PRESSURE IN HPA 893.3 894.6 891.9 889.7 885.8 881.7 879.4 879.8 887.6 890.6 894.7 893.3 894.7 YEAR-DAY 88- 3 91-15 3- 3 94- 5 97-12 98- 5 87-28 93-18 94-23 86-20 96-15 87- 1 96-15 MIN. QFE PRESSURE IN HPA 872.5 870.6 868.7 866.7 870.2 868.5 866.8 869.6 871.0 876.7 874.6 874.2 866.7 YEAR-DAY 98-13 98-13 1-26 2- 4 90-13 88-24 95-17 94- 1 0- 1 87- 9 95-26 94- 4 2- 4 MEAN QNH PRESSURE IN HPA 1022.2 1020.6 1018.9 1018.0 1016.3 1012.3 1010.0 1012.2 1016.7 1021.8 1023.4 1023.7 1018.0 MAX. QNH PRESSURE IN HPA 1032.5 1033.9 1030.9 1028.4 1024.0 1019.4 1016.8 1017.3 1026.0 1029.4 1034.0 1032.5 1034.0 YEAR-DAY 88- 3 91-15 3- 3 94- 5 97-12 98- 5 87-28 93-18 94-23 86-20 96-15 87- 1 96-15 MIN. QNH PRESSURE IN HPA 1009.1 1006.9 1004.8 1002.5 1006.5 1004.6 1002.6 1005.8 1007.4 1013.8 1011.4 1011.0 1002.5 YEAR-DAY 98-13 98-13 1-26 2- 4 90-13 88-24 95-17 94- 1 0- 1 87- 9 95-26 94- 4 2- 4 MEAN QFF PRESSURE IN HPA 1024.0 1018.3 1016.5 1011.3 1006.0 1001.1 997.9 1001.2 1008.5 1015.6 1019.9 1020.3 1011.7 MAX. QFF PRESSURE IN HPA 1034.5 1029.0 1031.0 1020.7 1011.8 1007.7 1001.9 1006.7 1019.0 1020.2 1026.5 1028.5 1034.5 YEAR-DAY 92-10 93- 8 92-13 93- 1 93-12 93-23 92-16 92-31 91-29 91-16 91-29 92-12 92-10 MIN. QFF PRESSURE IN HPA 1013.0 1006.5 1003.8 999.8 998.2 992.3 994.3 996.7 1001.3 1010.1 1011.9 1013.3 992.3 YEAR-DAY 92-23 92-11 93-22 92-19 93-29 92-27 92-23 92- 2 91- 8 91- 5 92-26 91- 3 92-27 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 883.1 881.4 879.7 878.8 877.3 873.9 872.0 873.9 877.8 882.6 884.3 884.6 879.1 MAX. QFE PRESSURE IN HPA 891.3 893.4 889.8 888.6 884.3 881.0 878.6 878.5 886.4 889.6 893.8 891.8 893.8 YEAR-DAY 88- 3 91-15 3- 3 94- 5 3- 2 87- 1 96- 3 92-31 94-23 86-20 96-15 87- 1 96-15 MIN. QFE PRESSURE IN HPA 869.5 868.5 868.3 869.6 867.3 867.5 865.7 868.2 869.4 876.2 875.2 873.5 865.7 YEAR-DAY 98-13 98-13 1-26 2- 4 91-23 2-21 95-16 94- 2 0- 1 87- 9 94-26 94- 4 95-16 MEAN QNH PRESSURE IN HPA 1021.0 1019.0 1017.2 1016.2 1014.4 1010.6 1008.5 1010.6 1015.0 1020.4 1022.3 1022.7 1016.5 MAX. QNH PRESSURE IN HPA 1030.2 1032.6 1028.5 1027.2 1022.3 1018.6 1015.9 1015.8 1024.7 1028.3 1033.0 1030.8 1033.0 YEAR-DAY 88- 3 91-15 3- 3 94- 5 3- 2 87- 1 96- 3 92-31 94-23 86-20 96-15 87- 1 96-15 MIN. QNH PRESSURE IN HPA 1005.7 1004.6 1004.3 1005.8 1003.2 1003.4 1001.4 1004.2 1005.6 1013.2 1012.1 1010.2 1001.4 YEAR-DAY 98-13 98-13 1-26 2- 4 91-23 2-21 95-16 94- 2 0- 1 87- 9 94-26 94- 4 95-16 MEAN QFF PRESSURE IN HPA 1022.8 1016.8 1014.5 1009.4 1004.7 999.6 996.5 999.7 1006.4 1014.6 1019.0 1019.3 1010.3 MAX. QFF PRESSURE IN HPA 1033.6 1027.5 1028.8 1017.7 1012.4 1006.6 1000.3 1006.2 1016.3 1019.0 1024.9 1027.6 1033.6 YEAR-DAY 92-10 93- 8 92-13 93- 1 93-11 93-23 92- 2 92-31 91-29 91-16 91-13 92-12 92-10 MIN. QFF PRESSURE IN HPA 1011.1 1003.8 1002.3 999.5 994.9 991.3 992.2 994.7 998.5 1009.6 1009.9 1012.3 991.3 YEAR-DAY 92-23 92-11 93-22 92-18 93-29 92-27 92-24 92- 2 91- 8 91- 5 92-26 91-16 92-27 ======================================================================================================================= 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 CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 884.1 882.1 880.2 879.2 877.5 873.9 872.1 874.1 878.3 883.4 885.3 885.6 879.7 MAX. QFE PRESSURE IN HPA 891.8 893.7 889.7 890.0 884.6 880.6 879.5 879.0 886.7 890.0 895.0 893.1 895.0 YEAR-DAY 92-10 91-15 3- 3 94- 5 95-26 98- 6 96- 3 96-29 94-23 86-20 96-15 87- 1 96-15 MIN. QFE PRESSURE IN HPA 867.6 870.0 870.1 870.6 868.5 867.3 865.5 868.5 869.7 876.9 877.6 873.8 865.5 YEAR-DAY 98-13 92-11 1-26 2- 4 90-13 2-21 95-16 94- 3 0- 1 98- 2 92-26 94- 4 95-16 MEAN QNH PRESSURE IN HPA 1022.1 1019.9 1017.8 1016.5 1014.7 1010.7 1008.7 1010.9 1015.6 1021.3 1023.5 1023.8 1017.1 MAX. QNH PRESSURE IN HPA 1030.8 1032.9 1028.4 1028.7 1022.7 1018.2 1016.9 1016.4 1025.0 1028.7 1034.4 1032.2 1034.4 YEAR-DAY 92-10 91-15 3- 3 94- 5 95-26 98- 6 96- 3 96-29 94-23 86-20 96-15 87- 1 96-15 MIN. QNH PRESSURE IN HPA 1003.5 1006.2 1006.4 1006.9 1004.6 1003.2 1001.2 1004.6 1005.9 1014.0 1014.8 1010.5 1001.2 YEAR-DAY 98-13 92-11 1-26 2- 4 90-13 2-21 95-16 94- 3 0- 1 98- 2 92-26 94- 4 95-16 MEAN QFF PRESSURE IN HPA 1023.3 1019.7 1015.0 1010.2 1005.7 999.5 996.7 999.9 1007.1 1016.1 1021.4 1024.2 1011.6 MAX. QFF PRESSURE IN HPA 1035.5 1037.6 1031.7 1028.7 1018.5 1010.4 1005.4 1008.1 1019.1 1026.6 1036.3 1037.4 1037.6 YEAR-DAY 92-10 91-15 3- 3 94- 5 3- 2 87- 1 96- 3 96-31 94-22 93- 9 96-15 87- 1 91-15 MIN. QFF PRESSURE IN HPA 1002.5 1002.9 1000.2 998.6 992.8 989.3 986.5 990.8 994.3 1005.1 1009.5 1005.1 986.5 YEAR-DAY 98-13 92-11 1-26 90-16 90-13 2-21 95-16 94- 3 0- 1 98- 2 94-26 94- 4 95-16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 885.1 882.5 881.3 880.5 878.8 875.7 873.6 875.7 880.2 884.8 886.1 884.8 880.8 MAX. QFE PRESSURE IN HPA 892.6 890.1 890.6 885.6 882.9 879.5 877.7 880.4 885.5 887.3 890.5 890.1 892.6 YEAR-DAY 92-10 93- 8 92-12 93- 1 93-11 92- 2 92- 5 92-31 91-28 91-27 91-13 92-12 92-10 MIN. QFE PRESSURE IN HPA 874.3 870.7 872.5 871.1 871.0 869.1 870.5 872.4 876.0 881.5 877.9 879.1 869.1 YEAR-DAY 93-14 92-11 93-12 92-18 93-29 92-27 92-24 92- 1 91- 3 91- 4 92-26 92- 4 92-27 MEAN QNH PRESSURE IN HPA 1023.3 1020.3 1019.0 1018.0 1016.2 1012.6 1010.3 1012.7 1017.7 1022.9 1024.3 1022.9 1018.3 MAX. QNH PRESSURE IN HPA 1031.7 1028.9 1029.4 1023.8 1020.8 1016.9 1014.9 1017.9 1023.7 1025.7 1029.3 1028.9 1031.7 YEAR-DAY 92-10 93- 8 92-12 93- 1 93-11 92- 2 92- 5 92-31 91-28 91-27 91-13 92-12 92-10 MIN. QNH PRESSURE IN HPA 1011.1 1007.0 1009.1 1007.5 1007.4 1005.2 1006.8 1008.9 1013.0 1019.2 1015.1 1016.5 1005.2 YEAR-DAY 93-14 92-11 93-12 92-18 93-29 92-27 92-24 92- 1 91- 3 91- 4 92-26 92- 4 92-27 MEAN QFF PRESSURE IN HPA 1025.3 1019.2 1016.5 1011.6 1005.9 1001.1 998.4 1002.0 1008.9 1017.1 1021.5 1021.7 1012.4 MAX. QFF PRESSURE IN HPA 1036.2 1029.6 1031.2 1019.5 1014.6 1008.1 1002.4 1009.6 1019.5 1019.8 1027.9 1030.0 1036.2 YEAR-DAY 92-10 93- 8 92-12 93- 1 93-11 93-23 92-15 92-31 91-28 91-15 91-29 92-11 92-10 MIN. QFF PRESSURE IN HPA 1014.0 1004.1 1003.1 999.4 995.8 991.9 994.9 997.0 1001.1 1012.2 1011.2 1014.1 991.9 YEAR-DAY 92-23 92-11 93-21 92-18 93-29 92-27 92-23 92- 1 91- 8 91- 4 92-26 92- 4 92-27 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 884.6 882.2 881.2 880.1 878.5 875.4 873.6 875.6 880.1 884.4 885.7 884.3 880.5 MAX. QFE PRESSURE IN HPA 891.8 889.3 890.5 884.9 881.9 879.2 877.7 880.7 885.6 886.7 890.2 889.5 891.8 YEAR-DAY 92-10 93- 8 92-12 93- 1 93-11 92-11 92- 5 92-31 91-28 91-19 91-13 92-11 92-10 MIN. QFE PRESSURE IN HPA 874.7 872.2 871.6 872.1 871.9 869.1 870.5 872.3 876.1 881.2 878.6 878.2 869.1 YEAR-DAY 93-14 92-11 93-21 92-18 93-29 92-27 92-24 92- 1 91- 3 91- 4 92-26 91-25 92-27 MEAN QNH PRESSURE IN HPA 1022.7 1020.0 1018.9 1017.6 1015.8 1012.4 1010.2 1012.6 1017.6 1022.5 1023.9 1022.3 1018.0 MAX. QNH PRESSURE IN HPA 1030.8 1028.0 1029.3 1023.0 1019.6 1016.6 1014.9 1018.3 1023.8 1025.0 1029.0 1028.2 1030.8 YEAR-DAY 92-10 93- 8 92-12 93- 1 93-11 92-11 92- 5 92-31 91-28 91-19 91-13 92-11 92-10 MIN. QNH PRESSURE IN HPA 1011.5 1008.7 1008.0 1008.6 1008.4 1005.2 1006.8 1008.8 1013.1 1018.8 1015.9 1015.5 1005.2 YEAR-DAY 93-14 92-11 93-21 92-18 93-29 92-27 92-24 92- 1 91- 3 91- 4 92-26 91-25 92-27 MEAN QFF PRESSURE IN HPA 1024.0 1018.4 1016.0 1010.9 1005.7 1000.7 998.1 1001.5 1008.1 1016.1 1020.3 1020.5 1011.7 MAX. QFF PRESSURE IN HPA 1034.3 1028.8 1030.8 1018.8 1012.9 1007.0 1002.2 1009.6 1019.1 1019.5 1026.1 1028.4 1034.3 YEAR-DAY 92-10 93- 8 92-12 93- 1 93-11 93-23 92-15 92-31 91-28 91-16 91-13 92-11 92-10 MIN. QFF PRESSURE IN HPA 1012.6 1005.5 1001.4 1000.8 996.7 992.2 994.6 997.2 1001.1 1011.7 1010.0 1014.3 992.2 YEAR-DAY 92-23 92-11 93-21 92-18 93-29 92-27 92-24 92- 1 91- 9 91- 4 92-26 91-15 92-27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 1 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** ***** 21.7 28.7 32.3 33.0 30.8 27.3 23.5 14.5 6.8 ****** 1987 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 1988 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 1989 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 1990 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 1991 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 1992 5.1 8.7 10.4 18.1 ***** 30.4 31.6 28.7 24.5 21.1 13.9 9.4 ****** 1993 4.5 9.9 12.3 20.1 26.5 30.1 32.4 31.0 28.7 19.6 15.7 10.4 20.1 1994 9.0 9.8 16.7 21.6 28.2 33.5 34.4 33.7 24.9 20.7 18.8 9.2 21.7 1995 9.0 10.6 14.3 21.4 27.3 32.3 35.9 33.5 27.8 22.1 16.6 7.5 21.5 1996 3.2 9.6 12.2 19.8 26.6 32.7 32.3 31.7 30.5 22.1 13.7 10.1 20.4 1997 8.8 10.3 14.1 20.4 26.4 32.4 35.4 32.9 28.9 22.7 13.7 9.2 21.3 1998 7.8 10.2 16.3 24.1 28.6 31.1 34.3 33.0 28.8 23.0 17.4 14.3 22.4 1999 7.9 11.7 14.8 23.2 28.7 33.8 33.6 32.8 28.5 23.8 16.1 10.7 22.1 2000 8.4 10.8 15.5 26.5 32.5 32.3 32.3 32.3 29.6 23.0 13.5 10.6 22.3 2001 7.9 10.9 17.8 26.3 31.8 33.8 34.5 32.7 28.8 23.6 16.9 13.2 23.2 2002 9.4 11.6 18.6 23.8 30.2 33.7 33.3 33.6 29.2 24.5 15.1 8.8 22.6 2003 9.3 12.6 16.7 24.6 26.6 33.0 35.4 32.4 27.9 23.6 14.3 9.4 22.1 MEAN 7.5 10.1 14.9 22.4 28.4 32.5 33.7 32.1 28.1 22.2 15.4 10.1 21.5 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 2 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M AVERAGE OF MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** 3.4 12.8 17.9 22.3 24.9 22.6 16.6 11.7 5.0 0.7 ****** 1987 -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 1988 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 1989 -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 1990 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 1991 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 1992 1.4 2.8 4.3 12.2 ***** 22.5 25.7 22.2 16.1 10.0 5.6 5.1 ****** 1993 0.6 4.5 6.1 13.2 18.0 22.2 25.5 22.5 18.8 8.6 6.3 0.7 12.2 1994 1.0 2.4 8.9 11.7 18.8 23.7 26.0 24.9 14.8 10.9 9.2 1.0 12.8 1995 0.7 3.2 5.7 12.1 17.8 22.2 28.2 25.2 16.3 11.4 5.5 3.2 12.6 1996 -1.0 3.7 8.3 12.5 16.8 23.5 25.6 22.5 19.2 10.7 3.9 -0.1 12.1 1997 0.4 1.7 7.3 11.9 16.9 23.4 27.0 23.5 17.1 12.9 6.4 2.6 12.6 1998 1.6 3.1 8.5 14.9 18.5 23.7 25.5 25.7 17.8 12.2 6.2 4.1 13.5 1999 1.3 5.6 7.5 13.2 17.8 22.7 25.4 25.1 17.8 12.7 7.1 0.4 13.1 2000 1.2 2.1 6.6 15.7 20.7 22.4 25.4 24.6 19.3 12.0 5.8 3.1 13.3 2001 -0.8 2.0 7.8 15.5 21.3 24.7 26.1 24.4 18.0 12.0 7.3 5.3 13.6 2002 2.3 3.8 9.1 14.7 19.2 22.9 25.6 24.8 18.1 13.7 6.5 1.0 13.5 2003 2.2 5.2 8.5 14.8 16.7 22.9 26.3 24.8 17.7 12.1 4.6 1.3 13.1 MEAN 0.7 2.9 7.1 13.4 18.1 23.1 25.8 23.9 17.4 11.2 5.9 2.3 12.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 3 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M AVERAGE OF MAXIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** 15.1 26.8 34.0 37.5 37.7 35.7 32.9 30.1 19.7 10.9 ****** 1987 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 1988 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 1989 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 1990 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 1991 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 1992 9.9 15.5 16.8 24.1 ***** 37.4 37.9 35.9 32.1 27.5 22.5 14.6 ****** 1993 8.8 15.4 18.4 26.7 33.4 37.1 36.7 35.9 34.1 25.9 21.6 16.6 25.9 1994 14.7 15.1 21.4 27.0 32.9 38.0 38.9 38.4 30.6 26.3 24.3 14.6 26.8 1995 14.3 15.6 19.2 26.7 31.8 37.1 40.0 38.1 33.6 28.1 23.2 11.1 26.6 1996 9.0 15.9 16.3 26.6 31.7 37.2 36.1 36.2 36.1 28.4 19.9 16.9 25.8 1997 14.1 15.7 18.5 25.1 30.8 37.0 39.9 37.9 35.0 28.3 18.7 13.8 26.2 1998 12.1 15.0 21.2 29.3 33.7 35.1 38.9 37.5 34.9 29.4 24.5 21.4 27.7 1999 12.9 15.9 19.6 28.5 34.0 39.1 38.2 37.1 34.2 29.9 21.4 17.2 27.4 2000 13.2 16.1 20.6 31.6 37.8 37.1 36.2 36.5 35.2 29.3 18.7 15.7 27.3 2001 13.9 16.5 23.6 31.7 36.8 38.4 39.2 37.3 34.4 30.0 22.5 18.3 28.6 2002 14.1 16.5 23.9 28.5 35.3 38.6 37.6 38.2 34.7 30.4 20.6 14.1 27.7 2003 13.9 17.4 21.4 29.7 31.4 38.0 39.9 36.7 33.6 29.9 20.3 14.7 27.3 MEAN 12.5 15.3 19.6 27.6 33.5 37.4 38.2 37.1 34.1 28.4 21.6 15.5 26.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 4 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** 11.7 14.0 16.1 15.2 12.8 13.1 16.3 18.4 14.7 10.2 ****** 1987 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 1988 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 1989 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 1990 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 1991 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 1992 8.5 12.7 12.5 11.9 ***** 14.9 12.2 13.7 16.0 17.5 16.9 9.5 ****** 1993 8.2 10.9 12.3 13.5 15.4 14.9 11.2 13.4 15.3 17.3 15.3 15.9 13.7 1994 13.7 12.7 12.5 15.3 14.1 14.3 12.9 13.5 15.8 15.4 15.1 13.6 14.0 1995 13.6 12.4 13.5 14.6 14.0 14.9 11.8 12.9 17.3 16.7 17.7 7.9 14.0 1996 10.0 12.2 8.0 14.1 14.9 13.7 10.5 13.7 16.9 17.7 16.0 17.0 13.7 1997 13.7 14.0 11.2 13.2 13.9 13.6 12.9 14.4 17.9 15.4 12.3 11.2 13.6 1998 10.5 11.9 12.7 14.4 15.2 11.4 13.4 11.8 17.1 17.2 18.3 17.3 14.2 1999 11.6 10.3 12.1 15.3 16.2 16.4 12.8 12.0 16.4 17.2 14.3 16.8 14.3 2000 12.0 14.0 14.0 15.9 17.1 14.7 10.8 11.9 15.9 17.3 12.9 12.6 14.0 2001 14.7 14.5 15.8 16.2 15.5 13.7 13.1 12.9 16.4 18.0 15.2 13.0 15.0 2002 11.8 12.7 14.8 13.8 16.1 15.7 12.0 13.4 16.6 16.7 14.1 13.1 14.2 2003 11.7 12.2 12.9 14.9 14.7 15.1 13.6 11.9 15.9 17.8 15.7 13.4 14.2 MEAN 11.8 12.4 12.5 14.2 15.4 14.3 12.4 13.2 16.7 17.2 15.7 13.2 14.0 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 5 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M AVERAGE OF MEAN DAILY TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** 9.3 19.8 26.0 29.9 31.3 29.2 24.8 20.9 12.4 5.8 ****** 1987 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 1988 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 1989 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 1990 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 1991 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 1992 5.6 9.2 10.5 18.2 ***** 30.0 31.8 29.0 24.1 18.7 14.1 9.9 ****** 1993 4.7 9.9 12.3 19.9 25.7 29.7 31.1 29.2 26.4 17.3 13.9 8.6 19.1 1994 7.9 8.7 15.1 19.3 25.9 30.8 32.4 31.7 22.7 18.6 16.7 7.8 19.8 1995 7.5 9.4 12.5 19.4 24.8 29.7 34.1 31.6 25.0 19.8 14.3 7.1 19.6 1996 4.0 9.8 12.3 19.5 24.2 30.4 30.8 29.4 27.6 19.5 11.9 8.4 19.0 1997 7.3 8.7 12.9 18.5 23.9 30.2 33.4 30.7 26.1 20.6 12.5 8.2 19.4 1998 6.9 9.1 14.9 22.1 26.1 29.4 32.2 31.6 26.3 20.8 15.3 12.7 20.6 1999 7.1 10.8 13.6 20.9 25.9 30.9 31.8 31.1 26.0 21.3 14.3 8.8 20.2 2000 7.2 9.1 13.6 23.6 29.2 29.8 30.8 30.6 27.2 20.7 12.3 9.4 20.3 2001 6.5 9.2 15.7 23.6 29.0 31.5 32.7 30.9 26.2 21.0 14.9 11.8 21.1 2002 8.2 10.2 16.5 21.6 27.2 30.8 31.6 31.5 26.4 22.0 13.5 7.6 20.6 2003 8.1 11.3 15.0 22.2 24.1 30.4 33.1 30.8 25.6 21.0 12.4 8.0 20.2 MEAN 6.6 9.1 13.4 20.5 25.8 30.2 32.0 30.5 25.8 19.8 13.8 8.9 19.7 SD 1.27 1.42 1.87 1.62 1.68 0.68 0.96 0.94 1.14 1.39 1.22 1.63 1.32 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 6 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M TEMPERATURE RECORDS LOWEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** -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 1987 -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 1988 -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 1989 -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 1990 -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 1991 -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 1992 -5.8 -5.0 -4.4 5.8 ***** 17.4 21.8 17.8 11.0 3.0 0.6 0.3 ****** DAY 7 17 13 6 ** 1 10 29 14 18 23 12 1993 -6.1 -1.8 0.4 7.0 11.0 15.6 19.6 16.8 13.8 2.6 -1.0 -3.2 -6.1 DAY 16 19 15 1 11 1 25 27 26 9 18 7 1994 -5.2 -2.8 3.0 1.0 12.8 19.4 22.6 19.4 10.8 4.4 4.2 -7.0 -7.0 DAY 11 5 4 6 12 2 3 12 27 14 27 9 1995 -3.6 -4.4 -3.8 5.8 13.2 17.8 22.6 19.2 11.2 3.2 -4.8 -2.8 -4.8 DAY 10 27 7 1 20 4 27 27 23 20 29 1 1996 -12.4 -1.6 2.2 1.6 10.6 18.8 22.2 13.6 12.6 4.0 -2.4 -5.2 -12.4 DAY 15 25 18 7 3 17 8 31 1 22 14 7 1997 -4.4 -5.4 -0.4 5.4 11.0 19.0 22.4 16.4 13.4 8.2 -1.0 -4.0 -5.4 DAY 27 10 2 14 7 5 12 30 17 28 26 29 1998 -4.2 -3.8 0.0 6.6 11.0 19.0 20.6 20.6 13.0 7.2 3.2 -0.6 -4.2 DAY 15 18 4 9 4 12 17 17 24 27 27 7 1999 -6.2 -2.2 0.6 6.0 13.2 18.4 20.6 19.2 11.2 9.8 2.4 -2.8 -6.2 DAY 4 2 8 13 23 18 23 15 30 10 5 20 2000 -7.4 -2.8 0.4 10.2 16.6 15.8 22.0 19.2 15.0 8.8 1.0 -2.4 -7.4 DAY 13 10 7 1 6 5 25 25 22 10 13 31 2001 -7.8 -6.6 -0.2 9.4 17.4 18.8 20.4 19.4 11.2 5.6 0.2 -0.6 -7.8 DAY 31 1 13 11 2 3 31 1 15 12 26 18 2002 -4.6 -3.4 1.6 6.4 15.4 19.8 19.4 14.4 12.6 8.2 1.2 -6.6 -6.6 DAY 20 2 9 5 19 9 23 15 29 21 25 6 2003 -4.4 -1.8 -3.8 4.6 7.2 17.8 21.2 19.2 7.0 8.4 -2.2 -7.4 -7.4 DAY 3 19 3 19 2 8 6 21 29 13 24 15 1986-2003 -12.4 -6.6 -4.4 1.0 4.2 14.8 17.8 13.6 7.0 0.0 -4.8 -10.2 -12.4 YEAR-DAY 96-15 89- 7 92-13 94- 6 89- 2 87- 2 86-26 96-31 3-29 87-17 87-30 86-13 96 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 7 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M TEMPERATURE RECORDS HIGHEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** 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 1987 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 1988 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 1989 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 1990 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 1991 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 1992 17.6 22.6 24.0 31.0 ***** 41.2 40.8 40.2 36.6 32.6 27.4 20.6 ****** DAY 3 24 30 25 ** 19 7 2 26 4 14 1 1993 18.0 22.0 24.8 32.6 39.6 42.0 40.4 38.6 36.4 35.4 29.8 19.6 42.0 DAY 30 22 19 22 28 21 4 13 1 2 2 25 1994 23.4 19.8 27.4 36.0 36.4 42.4 42.0 42.4 38.4 32.6 27.8 25.2 42.4 DAY 5 2 31 27 16 22 19 2 1 1 5 1 1995 19.0 19.6 26.6 32.2 38.0 41.6 43.0 41.6 37.2 34.6 28.8 18.4 43.0 DAY 31 5 26 5 7 16 14 12 12 6 3 5 1996 18.0 21.2 24.8 34.2 38.0 41.6 39.4 39.4 41.2 33.5 27.2 22.6 41.6 DAY 7 11 26 25 31 7 8 28 10 1 1 28 1997 19.2 25.4 24.2 30.0 35.6 41.6 43.4 42.2 39.2 35.4 26.6 18.2 43.4 DAY 11 23 24 10 24 16 18 10 4 1 5 8 1998 17.8 23.2 31.8 34.4 38.2 39.8 45.0 40.5 39.4 36.6 27.4 28.8 45.0 DAY 27 9 31 20 14 29 9 1 8 2 4 12 1999 19.6 21.4 29.8 33.8 37.6 43.8 43.0 39.6 39.6 32.6 28.6 21.8 43.8 DAY 17 27 27 29 20 30 8 30 1 12 2 30 2000 20.2 24.0 29.0 36.4 41.4 41.6 39.8 38.6 38.8 32.2 27.2 20.4 41.6 DAY 1 26 24 23 28 25 8 3 2 1 1 23 2001 19.8 21.0 28.6 36.0 39.6 43.6 43.4 41.4 41.6 33.4 27.2 23.0 43.6 DAY 14 22 31 29 31 30 14 31 1 1 1 7 2002 21.0 23.8 29.8 36.0 39.6 42.0 41.6 40.6 38.4 34.2 27.2 21.2 42.0 DAY 9 27 28 29 31 21 1 10 1 6 1 12 2003 19.0 24.2 27.4 36.4 35.2 40.2 44.0 43.6 37.6 35.4 30.2 23.0 44.0 DAY 11 26 20 28 23 4 3 1 14 4 1 7 1986-2003 23.6 25.4 31.8 36.6 41.4 43.8 45.0 43.6 41.6 36.6 30.2 28.8 45.0 YEAR-DAY 87-27 97-23 98-31 87-27 0-28 99-30 98- 9 3- 1 1- 1 98- 2 3- 1 98-12 98 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 8 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M 0C COOLING DEGREE DAYS (BASE 21) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** 0.0 15.0 153.6 266.7 309.0 252.9 112.5 47.6 0.0 0.0 ****** 1987 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 1988 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 1989 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 1990 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 1991 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 1992 0.0 0.0 0.0 15.9 ***** 269.1 334.5 248.4 91.9 2.3 0.0 0.0 ****** 1993 0.0 0.0 0.0 32.0 151.5 260.4 313.3 253.8 163.5 14.6 0.1 0.0 1189.2 1994 0.0 0.0 0.0 35.7 150.7 295.2 354.2 331.0 60.3 9.2 0.0 0.0 1236.3 1995 0.0 0.0 0.0 19.7 118.9 259.8 405.8 329.7 119.9 44.2 0.0 0.0 1298.0 1996 0.0 0.0 0.0 30.5 103.0 280.9 305.2 258.9 198.8 15.1 0.0 0.0 1192.5 1997 0.0 0.4 0.0 5.1 98.6 276.6 385.6 301.4 151.6 41.9 0.0 0.0 1261.2 1998 0.0 0.0 7.5 67.9 166.7 252.5 346.7 328.4 160.3 45.8 0.0 0.0 1375.9 1999 0.0 0.0 0.0 32.8 152.7 296.7 335.7 313.7 152.4 21.8 1.0 0.0 1306.8 2000 0.0 0.0 2.6 94.1 255.6 262.9 303.6 297.3 186.7 16.9 0.0 0.0 1419.8 2001 0.0 0.0 0.0 82.1 249.4 316.0 361.7 306.6 157.9 24.2 0.3 0.0 1498.2 2002 0.0 0.0 4.5 59.4 192.9 293.1 328.7 325.3 161.7 51.4 0.0 0.0 1417.0 2003 0.0 0.0 0.0 70.8 107.4 283.3 375.8 303.3 148.7 24.5 3.9 0.0 1317.7 MEAN 0.0 0.0 0.8 41.6 154.9 277.5 338.1 293.6 145.9 24.0 0.3 0.0 1276.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 9 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M 0C HEATING DEGREE DAYS (BASE 18) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** 204.2 12.3 0.0 0.0 0.0 0.0 0.0 15.5 172.3 378.5 ****** 1987 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 1988 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 1989 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 1990 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 1991 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 1992 383.2 256.0 231.8 50.2 ***** 0.0 0.0 0.0 0.0 21.0 118.3 251.6 ****** 1993 411.8 226.1 177.9 24.1 0.0 0.0 0.0 0.0 0.0 55.9 134.1 289.9 1319.8 1994 314.6 260.2 90.8 35.7 0.0 0.0 0.0 0.0 0.0 26.0 52.2 316.5 1096.0 1995 325.1 240.6 171.7 19.1 0.0 0.0 0.0 0.0 0.0 37.7 115.5 336.8 1246.5 1996 433.3 237.4 177.4 31.9 0.0 0.0 0.0 0.0 0.0 16.2 184.3 298.2 1378.6 1997 332.2 263.1 159.0 24.5 0.0 0.0 0.0 0.0 0.0 12.7 166.3 304.2 1262.0 1998 345.6 250.8 120.7 15.1 0.0 0.0 0.0 0.0 0.0 5.3 82.2 163.1 982.8 1999 337.5 202.7 142.6 10.7 0.0 0.0 0.0 0.0 0.0 0.0 117.2 285.4 1096.1 2000 333.5 258.8 149.5 0.9 0.0 0.0 0.0 0.0 0.0 0.2 172.5 265.6 1181.0 2001 355.9 245.4 79.9 0.0 0.0 0.0 0.0 0.0 0.0 3.6 97.7 191.6 974.0 2002 302.7 219.7 77.6 12.0 0.0 0.0 0.0 0.0 0.0 0.4 134.9 323.8 1071.1 2003 308.0 187.2 111.1 10.5 3.7 0.0 0.0 0.0 1.3 0.0 182.7 309.1 1113.6 MEAN 352.5 251.6 146.1 21.3 1.4 0.0 0.0 0.0 0.4 18.1 130.9 282.2 1204.5 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 10 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** ***** ***** ***** ***** ***** ***** ***** -1.1 0.2 -1.5 ****** 1987 -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 1988 -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 1989 -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 1990 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 1991 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 1992 -0.6 -3.2 -2.9 3.8 ***** 5.0 3.5 1.5 -3.2 -3.4 -6.6 2.2 ****** 1993 -0.2 2.2 1.0 5.3 2.4 -0.2 0.2 -1.1 -2.8 -5.1 -1.4 -4.9 -0.4 1994 -4.5 -3.2 2.6 0.3 2.0 4.5 3.8 0.6 -7.4 -1.8 0.6 -3.8 -0.5 1995 -2.4 -2.8 -0.5 2.7 0.4 1.4 4.5 0.8 -2.8 -0.6 -5.6 0.6 -0.4 1996 -3.0 0.2 6.3 1.7 3.7 7.8 3.7 2.2 3.9 -1.6 -3.5 -5.8 1.3 1997 -5.2 -8.7 0.2 5.2 6.8 8.4 8.3 -2.4 -2.1 0.5 0.0 0.4 0.9 1998 -0.5 -1.2 2.9 5.0 4.6 4.0 6.0 4.5 1.5 -1.9 -3.1 -3.9 1.5 1999 -3.8 2.8 1.2 0.3 0.4 4.3 7.1 3.6 2.3 -0.4 0.1 -6.4 1.0 2000 -4.3 -6.0 -6.2 -0.5 1.2 1.0 3.6 1.6 -0.2 0.2 -1.9 -1.5 -1.1 2001 -7.7 -6.6 -3.8 -2.5 -0.4 1.3 3.7 2.6 -0.3 -1.3 -3.4 1.4 -1.4 2002 -2.1 -3.6 -4.4 1.3 1.7 2.1 3.0 1.8 -2.9 -0.5 -1.0 -6.4 -0.9 2003 -2.5 -1.6 -2.9 0.9 -0.4 2.4 3.7 2.5 -0.6 -3.5 -6.3 -7.5 -1.3 MEAN -2.8 -2.4 -0.2 2.1 2.5 3.2 3.6 1.2 -1.0 -1.7 -2.7 -2.6 -0.1 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 11 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** ***** ***** ***** ***** ***** ***** ***** 4.15 4.61 4.24 ***** 1987 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 1988 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 1989 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 1990 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 1991 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 1992 4.41 3.66 3.81 5.86 ***** 6.34 5.73 4.98 3.55 3.54 2.76 5.36 ***** 1993 4.39 5.44 5.00 6.59 5.36 4.53 4.54 4.09 3.60 3.10 4.13 3.12 4.49 1994 3.37 3.57 5.49 4.63 5.22 6.22 5.98 4.71 2.61 3.96 4.70 3.60 4.51 1995 3.81 3.94 4.68 5.70 4.71 4.95 6.36 4.84 3.67 4.38 3.10 4.78 4.58 1996 3.72 4.56 7.09 5.20 6.01 8.23 5.84 5.24 5.92 4.19 3.51 3.01 5.21 1997 3.05 2.52 4.78 6.77 7.24 8.13 8.29 3.84 3.79 4.61 4.63 4.60 5.19 1998 4.44 4.27 5.63 6.53 6.37 5.98 6.95 6.30 5.18 3.95 3.53 3.34 5.21 1999 3.58 5.54 5.02 4.69 4.71 6.07 7.50 5.75 5.39 4.29 4.54 2.81 4.99 2000 3.53 2.93 3.11 4.32 4.87 4.86 5.86 5.09 4.48 4.50 4.08 4.02 4.30 2001 2.47 2.86 3.56 3.74 4.39 5.05 5.85 5.39 4.37 4.12 3.51 4.90 4.18 2002 4.11 3.88 3.35 4.96 5.04 5.19 5.53 5.13 3.64 4.26 4.36 3.05 4.38 2003 3.86 4.15 3.95 4.82 4.45 5.32 5.97 5.38 4.37 3.54 2.98 2.81 4.30 MEAN 3.81 3.98 4.70 5.36 5.48 5.79 5.92 4.95 4.32 4.03 3.83 3.91 4.67 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 12 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** ***** ***** ***** ***** ***** ***** ***** 5.87 6.50 5.99 ***** 1987 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 1988 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 1989 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 1990 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 1991 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 1992 6.22 5.14 5.36 8.21 ***** 8.83 7.97 6.95 4.99 4.99 3.91 7.55 ***** 1993 6.20 7.65 7.02 9.22 7.50 6.33 6.33 5.73 5.06 4.38 5.83 4.43 6.31 1994 4.75 5.02 7.71 6.51 7.31 8.64 8.29 6.57 3.69 5.59 6.64 5.08 6.32 1995 5.38 5.54 6.57 7.98 6.61 6.91 8.80 6.75 5.16 6.17 4.39 6.77 6.42 1996 5.26 6.41 9.91 7.29 8.41 11.41 8.13 7.30 8.27 5.91 4.98 4.27 7.30 1997 4.31 3.56 6.69 9.45 10.12 11.28 11.45 5.37 5.33 6.50 6.54 6.49 7.26 1998 6.25 6.01 7.89 9.13 8.91 8.35 9.65 8.78 7.25 5.57 5.00 4.74 7.29 1999 5.05 7.80 7.04 6.58 6.60 8.45 10.39 8.01 7.55 6.05 6.40 3.99 6.99 2000 4.97 4.13 4.39 6.06 6.81 6.78 8.15 7.11 6.29 6.35 5.77 5.68 6.04 2001 3.50 4.03 5.00 5.26 6.14 7.03 8.14 7.53 6.13 5.81 4.96 6.93 5.87 2002 5.80 5.47 4.72 6.95 7.05 7.24 7.72 7.16 5.12 6.01 6.16 4.31 6.14 2003 5.45 5.83 5.54 6.77 6.24 7.42 8.29 7.50 6.12 5.00 4.21 3.98 6.03 MEAN 5.37 5.61 6.60 7.51 7.66 8.07 8.23 6.91 6.06 5.68 5.41 5.52 6.55 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 13 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** ***** ***** ***** ***** ***** ***** ***** 25.16 11.37 4.55 ***** 1987 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 1988 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 1989 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 1990 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 1991 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 1992 3.01 6.82 7.93 13.84 ***** 36.17 39.71 33.85 27.40 21.66 13.22 4.64 ***** 1993 2.58 5.06 8.01 15.64 29.00 38.02 43.28 40.27 35.94 20.17 13.42 8.95 21.70 1994 7.38 7.87 12.09 21.32 32.17 44.68 47.33 47.29 29.35 20.09 16.13 7.62 24.44 1995 6.63 7.94 10.75 18.76 30.94 43.19 51.50 46.32 34.06 22.57 16.38 3.87 24.41 1996 3.02 6.11 4.88 17.71 27.90 39.60 41.05 40.74 37.54 22.29 11.89 9.02 21.81 1997 7.67 10.08 9.98 15.35 25.69 38.67 47.11 46.44 36.65 22.97 10.02 5.59 23.02 1998 4.67 7.14 12.03 22.61 32.20 37.56 46.15 42.45 34.48 24.42 16.26 12.74 24.39 1999 6.07 6.48 10.86 23.20 34.29 46.26 43.08 42.60 33.32 24.94 12.76 9.76 24.47 2000 6.75 9.60 14.39 30.19 43.90 43.08 41.01 42.17 36.90 23.29 10.55 7.69 25.80 2001 7.91 9.92 16.68 30.53 42.50 47.12 47.87 43.30 35.89 25.10 15.47 8.88 27.60 2002 6.71 8.93 18.09 24.22 37.45 46.72 44.47 46.32 37.10 26.44 11.98 7.70 26.34 2003 6.76 9.62 14.72 25.95 29.90 44.30 50.55 42.11 33.38 25.91 13.60 8.71 25.46 MEAN 5.63 7.53 11.48 21.37 32.88 42.54 45.47 42.64 34.28 22.85 13.47 7.63 23.98 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 14 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 *** *** *** *** *** *** *** *** *** 21 41 59 *** 1987 48 49 35 22 22 20 14 9 8 14 14 28 24 1988 47 46 42 30 17 13 15 16 18 24 26 48 29 1989 46 43 39 27 19 12 12 14 17 22 40 52 29 1990 68 60 38 34 25 15 15 15 20 25 32 51 33 1991 66 57 66 42 32 21 17 18 25 29 42 59 40 1992 70 46 44 44 *** 21 17 18 16 20 25 65 *** 1993 75 64 51 42 23 16 13 13 13 19 33 36 33 1994 42 45 44 27 20 17 16 13 12 23 31 43 28 1995 49 44 41 34 19 15 15 13 14 24 22 68 30 1996 68 57 72 34 25 23 17 16 19 22 32 34 35 1997 40 29 44 42 31 24 20 11 14 26 44 58 32 1998 60 49 45 31 24 19 19 18 19 21 27 31 30 1999 49 59 46 25 18 17 21 17 21 22 38 33 31 2000 47 35 28 19 15 15 17 15 17 24 40 47 27 2001 36 34 27 16 14 14 15 16 16 21 27 48 24 2002 50 41 24 27 18 15 16 14 14 21 38 39 26 2003 50 43 30 24 19 16 15 16 17 18 27 34 26 MEAN 54 47 42 31 21 17 16 15 16 22 32 46 30 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 15 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 *** *** *** *** *** *** *** *** *** 29 58 82 *** 1987 72 70 55 34 32 27 20 12 12 19 21 39 34 1988 69 75 70 49 31 20 22 23 28 35 41 70 44 1989 69 63 58 43 30 18 17 19 30 31 62 77 43 1990 90 87 60 55 40 23 23 23 28 35 45 68 48 1991 90 83 87 68 51 32 27 27 34 37 58 78 56 1992 90 68 65 68 *** 28 22 23 21 28 32 85 *** 1993 93 90 76 66 38 26 19 18 19 25 44 51 47 1994 60 73 72 43 29 23 20 17 15 32 42 66 41 1995 77 71 64 54 29 21 21 18 20 35 29 82 43 1996 91 86 90 55 40 34 22 21 27 31 45 47 49 1997 58 51 72 67 45 32 25 15 19 38 68 85 48 1998 83 75 69 48 38 30 30 27 33 35 45 51 47 1999 70 87 75 45 31 27 29 23 36 41 60 56 48 2000 70 65 49 38 25 22 22 22 28 42 67 74 44 2001 56 58 51 28 24 21 22 23 27 36 46 72 39 2002 74 64 44 47 31 24 22 23 23 38 60 60 43 2003 73 74 51 43 31 26 24 23 30 32 45 52 42 MEAN 76 73 65 50 34 26 23 21 25 33 48 66 45 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION NEHBANDAN (40827) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 16 LATITUDE 31 32 N LONGITUDE 60 2 E DATA PROCESSING CENTER ELEVATION 1211.0 M AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 *** *** *** *** *** *** *** *** *** 17 32 44 *** 1987 33 37 24 16 16 17 11 7 5 11 10 19 17 1988 32 28 28 20 11 9 11 11 13 17 16 33 19 1989 33 29 28 18 13 9 8 11 12 17 28 36 20 1990 51 44 26 22 17 11 11 10 15 19 25 40 24 1991 48 39 50 28 22 14 11 12 18 22 28 42 28 1992 48 29 28 27 *** 16 13 14 12 15 19 46 *** 1993 55 39 31 24 13 9 10 10 10 15 25 26 22 1994 30 30 29 19 15 14 13 10 9 18 22 28 20 1995 32 28 28 23 14 11 12 10 11 18 17 52 21 1996 44 34 58 21 17 17 14 13 15 1