STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** 2.5 8.1 16.5 20.1 26.6 28.8 26.9 20.7 13.7 8.0 4.5 ***** MINIMUN AIR TEMPERATURE (C) -2.4 -2.3 2.4 7.4 9.5 13.8 16.0 13.0 10.5 4.5 0.7 0.3 6.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 7 9 2 0 0 0 0 0 0 0 5 6 29 DAYS WITH FREEZING MIN.<= 0 19 17 7 0 0 0 0 0 0 2 12 16 73 TEMPERATURE RECORDS LOWEST(C) -7.2 -12.0 -7.6 2.4 4.2 7.8 12.0 6.2 2.0 -1.0 -7.0 -5.8 -12.0 DAY 16 14 12 8 6 24 15 23 29 14 25 21 MAXIMUM AIR TEMPERATURE (C) 5.8 6.6 12.1 20.9 25.5 31.7 34.1 33.4 29.4 21.8 15.5 9.7 20.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 22 30 31 18 0 0 0 105 DAYS WITH MAXIMUM TEMP. <= 0 0 3 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 12.0 15.4 19.6 28.2 35.6 35.8 41.0 38.5 38.0 25.4 26.0 17.4 41.0 DAY 31 27 30 22 31 12 8 6 9 27 4 1 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 8.9 9.7 13.5 16.0 17.9 18.1 20.4 18.9 17.3 14.8 9.4 14.5 MEAN DAILY TEMP. (MDT) (C) 1.7 2.2 7.3 14.2 17.5 22.7 25.1 23.2 20.0 13.1 8.1 5.0 13.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 7.3 57.9 126.2 72.6 32.0 0.0 0.0 0.0 296.1 HEATING DEG. DAYS(BASE 18 0C) 308.3 385.8 255.2 99.5 40.0 0.6 0.0 0.0 31.2 151.1 295.8 402.7 1970.1 DEWPOINT (MEAN C) ***** ***** ***** ***** ***** ***** ***** ***** 3.5 -0.2 -1.9 -0.8 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** ****** ****** ****** 5.82 4.43 3.90 4.28 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** ****** ****** ****** 8.16 6.25 5.51 6.02 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** ****** ****** ****** 18.49 10.52 6.03 2.91 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** *** *** 37 42 54 72 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** *** *** *** 57 64 76 87 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** *** *** *** 19 25 34 49 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** *** *** 53 61 72 83 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** *** *** 24 29 39 56 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** *** *** *** 27 36 49 73 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.4 33.3 89.7 29.4 17.8 0.0 0.2 0.0 0.1 0.6 1.8 100.7 313.0 DAYS WITH PRECIPITATION >=10 1 1 3 1 0 0 0 0 0 0 0 4 10 DAYS WITH PRECIPITATION >= 5 4 3 6 3 1 0 0 0 0 0 0 5 22 DAYS WITH PRECIPITATION >= 1 6 6 11 5 5 0 0 0 0 0 0 7 40 DAYS WITH PRECIPITATION 11 13 20 7 11 0 2 0 2 5 4 11 86 GREATEST DAILY PRECIPITATION 11.0 12.0 22.0 10.0 7.0 0.0 0.2 0.0 0.1 0.2 0.9 36.0 36.0 DAY 26 22 15 1 7 ** 14 ** 26 6 19 15 DAY WITH THUNDER STORM 0 1 1 1 5 0 0 0 0 0 0 1 9 DAYS WITH SNOW OR SLEET 4 9 2 0 0 0 0 0 0 0 0 2 17 DAYS WITH DUST 0 0 1 2 4 0 1 9 3 0 0 0 20 WIND DIRECTION (PREVAILING) *** 270 90 270 270 90 90 90 90 45 270 270 *** PREVAILING WIND SPEED(KNOTS) **** 5.2 6.6 7.7 7.9 7.7 8.0 10.5 7.8 3.5 4.6 5.0 **** PREVAILING WIND PERCENT ***** 17.5 19.9 14.8 13.1 16.0 14.1 26.3 17.7 7.1 7.6 7.4 ***** CALMS PERCENT OF WIND ***** 50.8 42.6 51.1 50.4 59.3 56.4 51.3 54.5 62.1 66.4 73.3 ***** NO. OF WIND OBSERVATION 109 120 141 135 137 150 163 156 231 224 223 243 2032 VECTOR WIND DIRECTION (MEAN) *** 181 95 232 194 85 112 103 101 339 348 318 *** VECTOR WIND MAGNITUDE(KNOTS) **** 0.1 0.5 0.7 0.6 1.0 0.7 2.9 1.0 0.2 0.6 0.4 **** WIND STEADINESES (MEAN %) ***** 4.2 16.1 21.2 16.7 34.5 22.6 74.4 34.5 11.8 40.0 33.3 ***** WIND SPEED (MEAN KNOTS) **** 2.4 3.1 3.3 3.6 2.9 3.1 3.9 2.9 1.7 1.5 1.2 **** FASTEST WIND DIRECTION *** 110 270 230 250 330 260 90 210 270 70 250 *** FASTEST WIND SPEED (KNOTS) *** 14 14 14 19 14 16 25 19 10 10 12 *** DAY ** 20 11 5 10 18 14 20 24 9 4 13 DAYS WITH SKY CLEAR (0-2)/8 8 5 5 8 7 28 28 27 25 20 16 10 187 DAYS WITH P.CLOUDY (3-6)/8 9 12 8 18 17 2 3 4 5 8 9 13 108 DAYS WITH CLOUDY (7-8)/8 10 11 18 3 6 0 0 0 0 3 5 8 64 DAYS WITH VISIBILITY =< 2 KM 10 8 8 2 1 0 0 0 0 0 0 4 33 DURATION OF SUNSHINE HOURS ****** ****** 80.4 172.4 268.2 353.1 359.1 353.9 294.9 247.7 206.2 123.6 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 ****** ****** ****** ****** ****** ****** ****** ****** 880.9 884.2 884.8 881.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 887.6 888.5 889.9 889.8 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 17- 6 21- 6 13- 6 17- 6 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 874.0 879.4 877.0 871.4 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 3-12 4-12 5-12 25-21 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1018.7 1022.4 1023.1 1019.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1026.3 1027.3 1028.9 1028.8 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 17- 6 21- 6 13- 6 17- 6 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1011.0 1017.1 1014.4 1008.1 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 3-12 4-12 5-12 25-21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1011.8 1019.4 1022.9 1020.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1023.4 1026.1 1032.7 1032.3 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 28- 3 14- 3 24- 3 17- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1002.1 1011.7 1009.8 1008.7 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 3-12 4-12 5-12 25-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 881.0 884.0 884.8 880.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 885.5 886.6 888.6 887.9 ****** DAY ** ** ** ** ** ** ** ** 17 13 24 18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 875.8 879.7 878.4 872.1 ****** DAY ** ** ** ** ** ** ** ** 8 5 5 26 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1018.8 1022.2 1023.1 1018.7 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1023.9 1025.2 1027.4 1026.6 ****** DAY ** ** ** ** ** ** ** ** 17 13 24 18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1013.0 1017.4 1015.9 1008.8 ****** DAY ** ** ** ** ** ** ** ** 8 5 5 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1011.6 1018.6 1022.4 1019.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1022.2 1022.9 1029.6 1030.5 ****** DAY ** ** ** ** ** ** ** ** 29 13 24 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1003.0 1012.0 1012.4 1010.1 ****** DAY ** ** ** ** ** ** ** ** 8 5 6 26 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 881.7 884.6 885.3 881.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 886.5 887.6 889.1 888.3 ****** DAY ** ** ** ** ** ** ** ** 17 13 24 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 876.5 880.2 878.4 872.5 ****** DAY ** ** ** ** ** ** ** ** 8 5 5 26 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1019.7 1022.9 1023.7 1019.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1025.0 1026.3 1028.0 1027.1 ****** DAY ** ** ** ** ** ** ** ** 17 13 24 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1013.8 1018.0 1015.9 1009.3 ****** DAY ** ** ** ** ** ** ** ** 8 5 5 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1013.9 1021.1 1024.8 1021.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1023.4 1026.1 1032.7 1032.3 ****** DAY ** ** ** ** ** ** ** ** 28 14 24 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1005.5 1013.7 1013.4 1011.7 ****** DAY ** ** ** ** ** ** ** ** 8 5 5 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 ****** ****** ****** ****** ****** ****** ****** ****** 882.4 885.4 886.2 882.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 887.6 888.5 889.9 889.8 ****** DAY ** ** ** ** ** ** ** ** 17 21 13 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 877.0 881.3 878.6 875.0 ****** DAY ** ** ** ** ** ** ** ** 3 5 5 26 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1020.4 1023.8 1024.7 1020.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1026.3 1027.3 1028.9 1028.8 ****** DAY ** ** ** ** ** ** ** ** 17 21 13 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1014.4 1019.2 1016.2 1012.1 ****** DAY ** ** ** ** ** ** ** ** 3 5 5 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1013.6 1020.5 1024.8 1021.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1023.1 1024.3 1031.2 1032.3 ****** DAY ** ** ** ** ** ** ** ** 28 14 27 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1005.0 1014.4 1012.0 1013.5 ****** DAY ** ** ** ** ** ** ** ** 8 5 5 2 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 881.1 884.2 884.8 881.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 885.9 887.3 889.2 888.1 ****** DAY ** ** ** ** ** ** ** ** 17 21 24 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 875.7 880.3 877.9 875.6 ****** DAY ** ** ** ** ** ** ** ** 3 4 5 1 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1019.0 1022.5 1023.1 1018.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1024.4 1025.9 1028.1 1026.8 ****** DAY ** ** ** ** ** ** ** ** 17 21 24 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1012.9 1018.1 1015.4 1012.8 ****** DAY ** ** ** ** ** ** ** ** 3 4 5 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1010.1 ****** 1019.7 1019.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1021.0 ****** 1027.5 1029.9 ****** DAY ** ** ** ** ** ** ** ** 28 ** 13 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1003.0 ****** 1010.1 1010.9 ****** DAY ** ** ** ** ** ** ** ** 8 ** 5 1 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 879.7 883.2 883.9 880.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 885.2 886.3 888.0 887.6 ****** DAY ** ** ** ** ** ** ** ** 30 21 13 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 874.0 879.4 877.0 874.2 ****** DAY ** ** ** ** ** ** ** ** 3 4 5 1 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1017.4 1021.3 1022.1 1018.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1023.6 1024.8 1026.7 1026.3 ****** DAY ** ** ** ** ** ** ** ** 30 21 13 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1011.0 1017.1 1014.4 1011.2 ****** DAY ** ** ** ** ** ** ** ** 3 4 5 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1010.3 1017.7 1021.2 1018.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1020.4 1022.0 1028.6 1029.4 ****** DAY ** ** ** ** ** ** ** ** 28 13 24 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1002.1 1011.7 1009.8 1010.0 ****** DAY ** ** ** ** ** ** ** ** 3 4 5 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 ****** ****** ****** ****** ****** ****** ****** ****** 879.8 883.6 884.4 881.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 885.5 886.8 888.7 888.3 ****** DAY ** ** ** ** ** ** ** ** 30 21 24 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 874.0 879.4 877.2 875.0 ****** DAY ** ** ** ** ** ** ** ** 3 4 5 1 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1017.5 1021.8 1022.7 1018.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1023.9 1025.4 1027.5 1027.1 ****** DAY ** ** ** ** ** ** ** ** 30 21 24 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1011.0 1017.1 1014.6 1012.1 ****** DAY ** ** ** ** ** ** ** ** 3 4 5 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1011.7 1019.9 1023.7 1020.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1022.3 1023.7 1032.1 1031.5 ****** DAY ** ** ** ** ** ** ** ** 28 13 24 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1004.0 1014.1 1012.5 1010.6 ****** DAY ** ** ** ** ** ** ** ** 7 4 5 1 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 881.1 884.2 885.0 881.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 886.6 887.3 889.0 888.5 ****** DAY ** ** ** ** ** ** ** ** 30 20 24 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 875.4 879.7 878.8 872.6 ****** DAY ** ** ** ** ** ** ** ** 3 4 5 25 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1019.0 1022.5 1023.3 1019.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1025.2 1025.9 1027.9 1027.3 ****** DAY ** ** ** ** ** ** ** ** 30 20 24 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1012.6 1017.4 1016.4 1009.4 ****** DAY ** ** ** ** ** ** ** ** 3 4 5 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1012.3 1019.3 1023.4 1020.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1022.6 1023.5 1030.4 1032.0 ****** DAY ** ** ** ** ** ** ** ** 27 13 23 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1003.7 1013.0 1013.0 1009.2 ****** DAY ** ** ** ** ** ** ** ** 7 4 5 12 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 880.4 ****** 883.7 880.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 886.3 ****** 888.1 888.1 ****** DAY ** ** ** ** ** ** ** ** 27 ** 12 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 875.9 ****** 879.3 871.4 ****** DAY ** ** ** ** ** ** ** ** 3 ** 5 25 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1018.1 ****** 1021.9 1018.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1024.8 ****** 1026.8 1026.8 ****** DAY ** ** ** ** ** ** ** ** 27 ** 12 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1013.1 ****** 1016.9 1008.1 ****** DAY ** ** ** ** ** ** ** ** 3 ** 5 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1009.9 ****** 1019.9 1019.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1022.0 ****** 1028.1 1031.0 ****** DAY ** ** ** ** ** ** ** ** 27 ** 27 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1003.0 ****** 1012.1 1008.7 ****** DAY ** ** ** ** ** ** ** ** 7 ** 4 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.3 3.2 3.6 12.4 14.8 23.3 26.1 22.7 18.7 12.4 9.5 4.4 12.6 MINIMUN AIR TEMPERATURE (C) -3.8 -1.0 -1.8 6.2 8.5 14.6 15.5 13.2 8.7 3.3 2.0 0.5 5.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 0 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 10 8 8 0 0 0 0 0 0 1 4 1 32 DAYS WITH FREEZING MIN.<= 0 24 20 19 1 1 0 0 0 0 4 10 10 89 TEMPERATURE RECORDS LOWEST(C) -17.6 -8.0 -15.8 0.0 -0.6 11.6 11.2 7.4 3.4 -4.0 -4.8 -4.8 -17.6 DAY 29 17 12 4 4 16 17 19 13 19 21 29 MAXIMUM AIR TEMPERATURE (C) 4.6 8.9 9.3 19.2 21.4 31.1 34.5 30.6 28.3 22.8 18.9 10.0 20.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 17 27 18 7 0 0 0 69 DAYS WITH MAXIMUM TEMP. <= 0 6 0 2 0 0 0 0 0 0 0 0 0 8 TEMPERATURE RECORDS HIGHEST(C) 13.2 18.4 17.8 28.2 29.2 38.4 38.0 36.0 34.2 28.0 24.8 16.4 38.4 DAY 21 23 30 14 30 19 6 25 25 12 14 16 DIF. BETWEEN (MAX.-MIN.) (C) 8.4 9.9 11.1 13.0 12.9 16.5 19.0 17.4 19.6 19.5 16.9 9.5 14.5 MEAN DAILY TEMP. (MDT) (C) 0.4 3.9 3.7 12.7 14.9 22.9 25.0 21.9 18.5 13.0 10.4 5.2 12.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 62.1 108.2 48.5 4.9 0.0 0.0 0.0 223.7 HEATING DEG. DAYS(BASE 18 0C) 515.8 408.0 442.4 120.7 106.9 0.0 0.0 2.0 19.7 153.8 227.4 396.0 2392.8 DEWPOINT (MEAN C) -4.5 -3.1 -2.3 3.7 6.8 8.8 4.6 4.9 0.4 -1.6 -2.6 0.8 1.3 MIXING RATIO (G/KG) 3.31 3.58 3.89 5.85 7.27 8.38 6.25 6.43 4.71 4.01 3.73 4.72 5.18 VAPOUR PRESSURE (HPA) 4.66 5.02 5.46 8.18 10.16 11.65 8.71 8.99 6.62 5.66 5.27 6.64 7.25 SATURATION DEF. (HPA) 1.79 3.14 2.99 6.94 7.77 18.66 26.93 20.02 16.52 10.23 7.85 2.03 10.41 RELATIVE HUMIDITY (MEAN %) 75 67 69 61 63 46 28 35 33 42 48 80 54 RELATIVE HUMIDITY (MAX. %) 88 87 88 85 85 72 46 54 56 64 72 95 74 RELATIVE HUMIDITY (MIN. %) 55 41 45 37 41 22 14 20 16 21 23 57 33 RELATIVE HUMIDITY (MEAN% 03UTC) 83 76 81 79 79 63 39 50 50 60 65 92 68 RELATIVE HUMIDITY (MEAN% 09UTC) 63 52 53 44 47 27 17 23 20 26 30 63 39 RELATIVE HUMIDITY (MEAN% 15UTC) 77 66 65 47 50 34 18 27 26 37 46 82 48 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 46.8 22.3 93.9 35.9 56.5 31.5 0.0 0.0 0.0 0.0 6.4 57.3 350.6 DAYS WITH PRECIPITATION >=10 1 1 2 1 2 2 0 0 0 0 0 2 11 DAYS WITH PRECIPITATION >= 5 3 1 7 2 4 2 0 0 0 0 1 5 25 DAYS WITH PRECIPITATION >= 1 10 4 9 6 8 4 0 0 0 0 1 8 50 DAYS WITH PRECIPITATION 15 12 19 13 15 9 0 0 0 0 4 14 101 GREATEST DAILY PRECIPITATION 14.4 14.0 25.0 15.6 19.3 14.0 0.0 0.0 0.0 0.0 6.0 17.0 25.0 DAY 22 11 10 19 13 6 ** ** ** ** 26 22 DAY WITH THUNDER STORM 0 1 2 4 6 9 0 0 0 0 0 2 24 DAYS WITH SNOW OR SLEET 11 7 7 0 0 0 0 0 0 0 1 6 32 DAYS WITH DUST 0 1 0 1 0 1 2 4 2 2 1 0 14 WIND DIRECTION (PREVAILING) 270 270 90 90 270 90 90 90 90 360 45 360 90 PREVAILING WIND SPEED(KNOTS) 5.4 6.5 6.2 7.9 6.2 8.5 8.7 8.6 6.2 4.9 5.9 5.3 7.7 PREVAILING WIND PERCENT 6.7 9.5 8.9 12.5 11.3 20.0 19.4 17.7 10.0 6.5 7.9 3.2 9.5 CALMS PERCENT OF WIND 72.9 61.2 66.5 55.0 63.3 55.0 60.2 56.9 70.0 81.9 76.7 84.3 67.1 NO. OF WIND OBSERVATION 240 232 248 240 248 240 216 248 240 248 240 248 2888 VECTOR WIND DIRECTION (MEAN) 324 339 63 97 232 102 100 128 114 351 9 349 98 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.3 0.5 0.2 0.3 1.2 1.8 1.5 0.3 0.2 0.2 0.1 0.4 WIND STEADINESES (MEAN %) 13.3 13.6 27.8 6.5 13.6 35.3 60.0 48.4 17.6 22.2 14.3 11.1 19.0 WIND SPEED (MEAN KNOTS) 1.5 2.2 1.8 3.1 2.2 3.4 3.0 3.1 1.7 0.9 1.4 0.9 2.1 FASTEST WIND DIRECTION 180 70 240 190 50 140 80 110 340 100 260 210 190 FASTEST WIND SPEED (KNOTS) 14 17 19 27 16 23 19 16 16 16 23 14 27 DAY 3 21 6 15 11 5 12 5 3 15 26 28 DAYS WITH SKY CLEAR (0-2)/8 6 10 5 3 6 14 27 28 28 26 20 6 179 DAYS WITH P.CLOUDY (3-6)/8 17 12 13 20 16 15 0 3 2 5 8 15 126 DAYS WITH CLOUDY (7-8)/8 8 7 13 7 9 1 0 0 0 0 2 10 57 DAYS WITH VISIBILITY =< 2 KM 6 3 3 1 3 1 0 0 0 0 1 6 24 DURATION OF SUNSHINE HOURS 114.3 137.9 141.5 148.1 243.6 311.5 333.1 339.4 313.6 282.0 215.7 110.6 2691.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 881.4 878.2 880.0 878.2 880.1 876.4 876.1 879.0 881.4 883.1 884.1 882.4 880.0 MAX. QFE PRESSURE IN HPA 893.1 886.5 889.6 882.7 886.8 882.3 880.6 886.4 887.3 888.8 893.7 888.8 893.7 DAY-HOUR 10- 6 16-18 12- 9 8- 6 2-18 7- 3 6- 6 31- 6 30- 6 30- 6 4- 6 29- 6 MIN. QFE PRESSURE IN HPA 870.5 868.9 868.9 870.9 874.1 869.6 871.9 872.0 875.2 878.3 871.5 875.6 868.9 DAY-HOUR 3- 0 11-12 31- 0 18-15 19-12 27-12 24-12 1-12 18-12 5-12 26- 9 28- 9 MEAN QNH PRESSURE IN HPA 1019.3 1015.7 1017.7 1015.7 1017.8 1013.7 1013.4 1016.6 1019.3 1021.2 1022.3 1020.4 1017.8 MAX. QNH PRESSURE IN HPA 1032.5 1025.0 1028.5 1020.8 1025.4 1020.3 1018.4 1024.9 1025.9 1027.6 1033.1 1027.6 1033.1 DAY-HOUR 10- 6 16-18 12- 9 8- 6 2-18 7- 3 6- 6 31- 6 30- 6 30- 6 4- 6 29- 6 MIN. QNH PRESSURE IN HPA 1007.0 1005.2 1005.2 1007.5 1011.1 1006.0 1008.6 1008.7 1012.3 1015.8 1008.2 1012.8 1005.2 DAY-HOUR 3- 0 11-12 31- 0 18-15 19-12 27-12 24-12 1-12 18-12 5-12 26- 9 28- 9 MEAN QFF PRESSURE IN HPA 1023.6 1017.7 1019.6 1012.8 1013.6 1005.2 1003.8 1008.7 1013.4 1018.5 1021.2 1021.7 1015.0 MAX. QFF PRESSURE IN HPA 1039.5 1031.3 1038.2 1021.2 1026.5 1014.2 1010.4 1019.8 1023.0 1027.2 1033.4 1032.6 1039.5 DAY-HOUR 10- 6 16-18 12-15 4- 3 2-18 7- 3 14- 6 31- 6 30- 6 18- 3 4- 3 29- 6 MIN. QFF PRESSURE IN HPA 1005.8 1002.0 1001.0 1000.8 1004.3 996.0 998.9 999.0 1004.8 1010.8 1004.7 1011.7 996.0 DAY-HOUR 3- 0 25-12 31- 0 15-12 19-12 27-21 26-15 1-12 18-12 13-21 26- 9 28- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 880.8 877.7 879.6 877.7 879.8 876.4 876.2 879.0 881.5 883.0 884.0 882.1 879.8 MAX. QFE PRESSURE IN HPA 891.6 885.2 887.7 880.9 885.4 881.9 879.9 883.9 885.4 887.9 892.6 887.1 892.6 DAY 10 17 13 4 3 7 15 31 30 30 4 3 MIN. QFE PRESSURE IN HPA 870.5 871.8 868.9 872.1 874.5 870.2 873.4 874.3 875.7 879.3 874.7 876.0 868.9 DAY 3 25 31 1 10 27 19 2 18 14 26 20 MEAN QNH PRESSURE IN HPA 1018.7 1015.2 1017.3 1015.2 1017.5 1013.7 1013.5 1016.6 1019.4 1021.1 1022.2 1020.1 1017.5 MAX. QNH PRESSURE IN HPA 1030.8 1023.6 1026.4 1018.7 1023.8 1019.9 1017.6 1022.1 1023.8 1026.6 1031.9 1025.7 1031.9 DAY 10 17 13 4 3 7 15 31 30 30 4 3 MIN. QNH PRESSURE IN HPA 1007.0 1008.5 1005.2 1008.8 1011.5 1006.7 1010.3 1011.3 1012.9 1016.9 1011.8 1013.2 1005.2 DAY 3 25 31 1 10 27 19 2 18 14 26 20 MEAN QFF PRESSURE IN HPA 1022.3 1016.7 1019.0 1012.2 1013.1 1005.4 1004.1 1008.7 1013.1 1017.8 1020.3 1020.9 1014.5 MAX. QFF PRESSURE IN HPA 1037.6 1028.6 1034.8 1019.2 1024.7 1012.9 1009.4 1016.4 1019.6 1025.0 1031.0 1029.3 1037.6 DAY 10 17 12 4 3 7 15 31 30 18 5 29 MIN. QFF PRESSURE IN HPA 1005.8 1004.7 1001.0 1004.5 1005.1 996.8 1001.2 1002.1 1005.6 1011.9 1007.8 1011.7 996.8 DAY 3 25 31 19 19 27 24 2 18 14 26 28 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 881.1 878.3 880.0 878.3 880.5 877.2 877.1 880.0 882.3 883.6 884.5 882.5 880.4 MAX. QFE PRESSURE IN HPA 892.2 884.3 888.3 881.9 885.9 882.3 880.4 886.0 886.4 888.2 892.9 887.5 892.9 DAY 10 17 13 4 3 7 14 31 30 30 4 3 MIN. QFE PRESSURE IN HPA 870.7 870.8 868.9 873.6 875.3 871.2 873.7 874.8 876.7 880.3 874.3 876.2 868.9 DAY 3 11 31 19 19 27 19 1 18 14 26 28 MEAN QNH PRESSURE IN HPA 1018.9 1015.8 1017.8 1015.9 1018.3 1014.5 1014.4 1017.7 1020.3 1021.8 1022.8 1020.6 1018.2 MAX. QNH PRESSURE IN HPA 1031.5 1022.6 1027.1 1019.9 1024.4 1020.3 1018.2 1024.5 1024.9 1027.0 1032.2 1026.2 1032.2 DAY 10 17 13 4 3 7 14 31 30 30 4 3 MIN. QNH PRESSURE IN HPA 1007.3 1007.4 1005.2 1010.5 1012.4 1007.8 1010.6 1011.9 1014.0 1018.1 1011.3 1013.5 1005.2 DAY 3 11 31 19 19 27 19 1 18 14 26 28 MEAN QFF PRESSURE IN HPA 1023.7 1018.3 1020.4 1013.5 1014.1 1006.3 1005.0 1010.4 1015.5 1020.8 1023.3 1022.6 1016.2 MAX. QFF PRESSURE IN HPA 1039.2 1029.1 1037.7 1021.2 1025.5 1014.2 1010.1 1019.8 1022.7 1027.2 1033.4 1031.3 1039.2 DAY 10 17 12 4 3 7 15 31 30 18 4 29 MIN. QFF PRESSURE IN HPA 1006.5 1005.4 1001.7 1005.9 1005.1 997.9 1001.4 1003.9 1008.2 1015.3 1009.6 1013.5 997.9 DAY 3 25 31 15 19 27 26 2 18 14 26 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 882.3 879.2 880.9 879.1 881.0 877.3 877.3 880.4 882.8 884.5 885.3 883.5 881.1 MAX. QFE PRESSURE IN HPA 893.1 886.1 889.2 882.7 886.0 881.9 880.6 886.4 887.3 888.8 893.7 888.8 893.7 DAY 10 16 12 8 3 11 6 31 30 30 4 29 MIN. QFE PRESSURE IN HPA 872.2 871.8 869.9 873.8 875.6 871.0 874.1 875.0 877.4 881.4 874.0 877.4 869.9 DAY 1 11 31 15 19 27 19 1 18 14 26 28 MEAN QNH PRESSURE IN HPA 1020.4 1016.8 1018.8 1016.7 1018.9 1014.7 1014.7 1018.2 1020.8 1022.8 1023.7 1021.7 1019.0 MAX. QNH PRESSURE IN HPA 1032.5 1024.6 1028.1 1020.8 1024.5 1019.9 1018.4 1024.9 1025.9 1027.6 1033.1 1027.6 1033.1 DAY 10 16 12 8 3 11 6 31 30 30 4 29 MIN. QNH PRESSURE IN HPA 1009.0 1008.5 1006.4 1010.8 1012.8 1007.6 1011.1 1012.1 1014.8 1019.3 1011.0 1014.8 1006.4 DAY 1 11 31 15 19 27 19 1 18 14 26 28 MEAN QFF PRESSURE IN HPA 1024.7 1019.1 1020.7 1013.9 1014.7 1006.3 1005.1 1010.4 1014.9 1020.0 1022.5 1023.2 1016.3 MAX. QFF PRESSURE IN HPA 1039.5 1029.5 1037.1 1020.3 1025.5 1012.9 1010.4 1019.8 1023.0 1026.6 1032.6 1032.6 1039.5 DAY 10 16 12 8 3 7 14 31 30 17 4 29 MIN. QFF PRESSURE IN HPA 1008.6 1006.6 1003.0 1002.9 1005.7 997.3 1001.7 1004.2 1007.8 1014.1 1007.9 1015.0 997.3 DAY 3 25 31 15 19 27 24 2 18 14 26 28 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 881.3 878.4 880.2 878.3 880.2 876.5 876.2 879.1 881.3 883.0 883.7 882.1 880.0 MAX. QFE PRESSURE IN HPA 892.0 886.2 889.6 881.7 885.9 881.1 879.7 885.0 885.8 886.8 892.0 886.9 892.0 DAY 10 16 12 8 2 11 14 31 30 17 4 1 MIN. QFE PRESSURE IN HPA 873.4 870.6 869.2 872.6 875.1 870.5 873.0 873.6 876.2 880.0 871.5 875.6 869.2 DAY 17 11 31 15 19 27 19 1 18 14 26 28 MEAN QNH PRESSURE IN HPA 1019.2 1015.9 1018.0 1015.8 1018.0 1013.7 1013.5 1016.7 1019.2 1021.1 1021.9 1020.1 1017.8 MAX. QNH PRESSURE IN HPA 1031.2 1024.7 1028.5 1019.6 1024.4 1019.0 1017.4 1023.4 1024.3 1025.4 1031.2 1025.5 1031.2 DAY 10 16 12 8 2 11 14 31 30 17 4 1 MIN. QNH PRESSURE IN HPA 1010.3 1007.2 1005.6 1009.4 1012.2 1007.0 1009.9 1010.5 1013.5 1017.7 1008.2 1012.8 1005.6 DAY 17 11 31 15 19 27 19 1 18 14 26 28 MEAN QFF PRESSURE IN HPA 1023.1 1017.6 1019.5 1012.8 1013.5 1005.0 1003.6 1008.6 1012.8 1017.5 1019.8 1020.9 1014.5 MAX. QFF PRESSURE IN HPA 1037.5 1029.0 1037.2 1019.4 1025.2 1011.2 1009.3 1017.7 1020.8 1025.4 1030.0 1029.0 1037.5 DAY 10 16 12 20 2 7 14 31 30 17 4 29 MIN. QFF PRESSURE IN HPA 1010.4 1004.2 1003.0 1002.3 1005.5 996.3 999.9 1002.6 1005.7 1011.6 1004.7 1012.6 996.3 DAY 17 25 31 15 19 19 27 2 18 14 26 28 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 880.8 877.4 879.2 877.1 879.2 875.4 875.0 877.7 880.0 881.9 883.0 881.6 879.0 MAX. QFE PRESSURE IN HPA 891.3 885.3 889.1 880.6 885.6 879.8 878.2 883.9 884.4 886.2 891.4 885.8 891.4 DAY 10 16 12 20 2 10 14 31 30 29 4 1 MIN. QFE PRESSURE IN HPA 873.2 868.9 870.1 871.2 874.1 869.6 871.9 872.0 875.2 878.3 873.0 876.3 868.9 DAY 23 11 31 15 19 27 24 1 18 5 26 19 MEAN QNH PRESSURE IN HPA 1018.6 1014.8 1016.9 1014.5 1016.8 1012.5 1012.1 1015.1 1017.7 1019.9 1021.1 1019.6 1016.6 MAX. QNH PRESSURE IN HPA 1030.4 1023.7 1028.0 1018.4 1024.0 1017.5 1015.7 1022.1 1022.7 1024.7 1030.6 1024.3 1030.6 DAY 10 16 12 20 2 10 14 31 30 29 4 1 MIN. QNH PRESSURE IN HPA 1010.1 1005.2 1006.6 1007.8 1011.1 1006.0 1008.6 1008.7 1012.3 1015.8 1009.9 1013.6 1005.2 DAY 23 11 31 15 19 27 24 1 18 5 26 19 MEAN QFF PRESSURE IN HPA 1022.6 1016.3 1018.4 1011.5 1012.6 1004.3 1002.8 1007.1 1011.4 1016.5 1019.3 1020.5 1013.6 MAX. QFF PRESSURE IN HPA 1036.7 1027.7 1036.7 1017.8 1024.3 1011.4 1007.4 1017.3 1019.4 1023.7 1030.0 1028.2 1036.7 DAY 10 16 12 3 2 8 15 31 30 17 4 29 MIN. QFF PRESSURE IN HPA 1011.1 1002.0 1003.7 1000.8 1004.3 996.3 999.0 999.0 1004.8 1011.5 1008.5 1013.4 996.3 DAY 3 25 31 15 19 19 24 1 18 13 26 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 881.7 878.1 879.7 877.5 879.3 875.4 875.0 877.7 880.3 882.5 883.9 882.3 879.4 MAX. QFE PRESSURE IN HPA 891.5 886.0 889.3 881.1 885.9 879.9 878.2 883.6 884.8 887.4 891.7 886.7 891.7 DAY 10 16 12 3 2 10 14 31 30 29 4 1 MIN. QFE PRESSURE IN HPA 874.5 870.6 870.1 870.9 874.4 869.6 871.9 872.2 875.6 878.3 878.0 877.5 869.6 DAY 23 11 30 18 19 27 26 1 17 5 26 19 MEAN QNH PRESSURE IN HPA 1019.6 1015.6 1017.4 1014.9 1017.0 1012.6 1012.1 1015.2 1018.1 1020.5 1022.1 1020.3 1017.1 MAX. QNH PRESSURE IN HPA 1030.7 1024.5 1028.2 1019.0 1024.4 1017.6 1015.7 1021.8 1023.1 1026.1 1030.9 1025.3 1030.9 DAY 10 16 12 3 2 10 14 31 30 29 4 1 MIN. QNH PRESSURE IN HPA 1011.5 1007.2 1006.6 1007.5 1011.4 1006.0 1008.6 1009.0 1012.8 1015.8 1015.5 1014.9 1006.0 DAY 23 11 30 18 19 27 26 1 17 5 26 19 MEAN QFF PRESSURE IN HPA 1024.5 1018.1 1019.8 1012.3 1012.9 1004.4 1002.7 1007.7 1013.3 1019.4 1022.5 1022.3 1015.0 MAX. QFF PRESSURE IN HPA 1038.5 1029.6 1038.2 1018.7 1024.9 1011.1 1007.7 1017.5 1021.3 1026.8 1032.8 1029.6 1038.5 DAY 10 16 12 3 2 6 14 31 30 17 4 29 MIN. QFF PRESSURE IN HPA 1013.8 1004.6 1003.8 1004.5 1004.3 996.4 998.9 1000.2 1006.3 1014.2 1015.2 1016.1 996.4 DAY 3 25 31 18 19 27 26 1 18 5 25 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 881.9 878.7 880.3 878.9 880.5 876.6 876.2 879.1 881.5 883.3 884.4 882.7 880.3 MAX. QFE PRESSURE IN HPA 891.2 886.5 889.5 882.2 886.8 880.9 879.4 885.2 885.6 888.3 892.0 887.2 892.0 DAY 9 16 12 30 2 6 14 31 30 29 4 2 MIN. QFE PRESSURE IN HPA 875.4 872.4 871.4 872.7 876.1 870.3 873.2 874.0 876.2 879.1 877.4 877.9 870.3 DAY 23 11 30 18 20 27 18 1 17 5 25 19 MEAN QNH PRESSURE IN HPA 1019.9 1016.2 1018.0 1016.5 1018.3 1013.9 1013.4 1016.7 1019.4 1021.4 1022.7 1020.7 1018.1 MAX. QNH PRESSURE IN HPA 1030.3 1025.0 1028.4 1020.2 1025.4 1018.7 1017.1 1023.6 1024.0 1027.1 1031.2 1025.8 1031.2 DAY 9 16 12 30 2 6 14 31 30 29 4 2 MIN. QNH PRESSURE IN HPA 1012.6 1009.2 1008.1 1009.5 1013.3 1006.8 1010.1 1011.0 1013.5 1016.7 1014.8 1015.4 1006.8 DAY 23 11 30 18 20 27 18 1 17 5 25 19 MEAN QFF PRESSURE IN HPA 1024.3 1018.5 1019.9 1013.6 1014.2 1005.4 1003.7 1008.8 1013.5 1018.6 1021.5 1022.3 1015.4 MAX. QFF PRESSURE IN HPA 1037.0 1031.3 1035.3 1020.5 1026.5 1012.7 1009.3 1019.4 1021.6 1026.9 1031.5 1030.3 1037.0 DAY 9 16 12 3 2 6 14 31 30 17 4 31 MIN. QFF PRESSURE IN HPA 1014.0 1006.6 1004.4 1004.8 1006.1 996.0 1000.1 1001.7 1007.1 1012.1 1011.9 1015.5 996.0 DAY 2 25 30 18 19 27 26 1 17 5 25 19 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 881.6 878.3 880.0 878.7 880.2 876.4 876.3 879.3 881.5 883.1 884.1 882.2 880.1 MAX. QFE PRESSURE IN HPA 891.3 886.1 889.1 882.2 886.0 881.9 879.7 885.2 885.2 888.3 892.2 887.1 892.2 DAY 9 16 12 30 2 6 14 31 2 29 3 2 MIN. QFE PRESSURE IN HPA 873.4 873.0 870.4 872.0 875.8 870.7 873.5 874.3 875.7 879.2 875.2 876.6 870.4 DAY 2 25 30 18 19 27 18 1 17 5 25 27 MEAN QNH PRESSURE IN HPA 1019.6 1015.8 1017.7 1016.3 1017.9 1013.7 1013.5 1016.9 1019.4 1021.3 1022.3 1020.2 1017.9 MAX. QNH PRESSURE IN HPA 1030.4 1024.6 1028.0 1020.2 1024.5 1019.9 1017.4 1023.6 1023.6 1027.1 1031.5 1025.7 1031.5 DAY 9 16 12 30 2 6 14 31 2 29 3 2 MIN. QNH PRESSURE IN HPA 1010.3 1009.9 1006.9 1008.7 1013.0 1007.3 1010.4 1011.3 1012.9 1016.8 1012.3 1013.9 1006.9 DAY 2 25 30 18 19 27 18 1 17 5 25 27 MEAN QFF PRESSURE IN HPA 1023.3 1017.5 1019.1 1013.1 1013.5 1004.8 1003.6 1008.6 1013.0 1017.7 1020.3 1021.1 1014.6 MAX. QFF PRESSURE IN HPA 1037.1 1030.3 1035.3 1020.4 1025.4 1012.7 1009.3 1018.9 1020.3 1026.1 1031.4 1029.8 1037.1 DAY 9 16 12 3 2 6 14 31 30 17 4 31 MIN. QFF PRESSURE IN HPA 1009.8 1006.4 1003.3 1005.0 1006.1 996.0 1000.0 1001.2 1005.6 1010.8 1008.7 1012.4 996.0 DAY 2 24 30 18 19 27 26 1 17 13 25 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.9 3.7 6.1 14.1 18.1 23.6 26.1 23.9 21.1 11.9 7.2 3.3 13.2 MINIMUN AIR TEMPERATURE (C) -5.2 -0.6 0.5 7.6 11.4 14.3 16.4 14.0 11.3 3.0 1.2 -1.8 6.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 19 3 5 0 0 0 0 0 0 0 5 4 36 DAYS WITH FREEZING MIN.<= 0 29 19 15 0 0 0 0 0 0 6 13 25 107 TEMPERATURE RECORDS LOWEST(C) -12.6 -6.4 -12.8 1.0 3.0 11.2 12.2 9.2 6.0 -3.5 -7.2 -5.6 -12.8 DAY 21 17 3 2 11 24 30 4 28 9 23 1 MAXIMUM AIR TEMPERATURE (C) 4.1 9.2 12.2 21.4 25.1 31.5 33.5 32.0 30.7 20.8 14.4 10.4 20.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 19 31 28 20 2 0 0 104 DAYS WITH MAXIMUM TEMP. <= 0 5 0 0 0 0 0 0 0 0 0 0 0 5 TEMPERATURE RECORDS HIGHEST(C) 13.8 15.4 20.6 29.2 32.2 37.6 36.6 36.4 35.6 32.0 24.4 16.0 37.6 DAY 29 12 30 20 27 19 3 28 4 1 1 23 DIF. BETWEEN (MAX.-MIN.) (C) 9.3 9.8 11.7 13.8 13.7 17.2 17.1 18.0 19.4 17.8 13.2 12.2 14.4 MEAN DAILY TEMP. (MDT) (C) -0.6 4.3 6.4 14.5 18.3 22.9 25.0 23.0 21.0 11.9 7.8 4.3 13.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.7 8.5 64.3 122.8 64.9 29.9 0.1 0.0 0.0 291.2 HEATING DEG. DAYS(BASE 18 0C) 575.1 384.3 360.8 113.7 38.5 0.0 0.0 0.0 3.1 195.6 306.7 424.9 2402.8 DEWPOINT (MEAN C) -5.2 -0.4 -0.9 4.7 9.2 7.3 5.6 5.9 7.0 -1.1 -1.6 -1.6 2.4 MIXING RATIO (G/KG) 3.02 4.37 4.30 6.31 8.59 7.64 6.68 6.79 7.26 4.27 4.04 3.88 5.60 VAPOUR PRESSURE (HPA) 4.27 6.15 6.04 8.81 11.96 10.64 9.31 9.49 10.15 6.03 5.70 5.48 7.84 SATURATION DEF. (HPA) 1.76 2.19 4.04 8.27 10.01 20.41 25.92 21.55 16.79 9.20 5.46 2.63 10.69 RELATIVE HUMIDITY (MEAN %) 75 78 66 60 61 42 30 34 43 44 58 73 55 RELATIVE HUMIDITY (MAX. %) 90 95 90 83 87 71 49 52 64 67 80 92 77 RELATIVE HUMIDITY (MIN. %) 53 55 41 34 34 20 16 20 25 25 37 48 34 RELATIVE HUMIDITY (MEAN% 03UTC) 86 89 86 77 79 57 42 50 62 62 77 90 71 RELATIVE HUMIDITY (MEAN% 09UTC) 58 63 48 38 40 24 18 24 29 30 42 53 39 RELATIVE HUMIDITY (MEAN% 15UTC) 76 75 58 53 54 28 21 23 34 39 54 74 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 21.5 77.5 61.7 67.7 71.9 2.7 1.0 0.5 0.0 1.0 10.7 6.4 322.6 DAYS WITH PRECIPITATION >=10 0 2 2 3 3 0 0 0 0 0 0 0 10 DAYS WITH PRECIPITATION >= 5 2 6 4 5 3 0 0 0 0 0 1 1 22 DAYS WITH PRECIPITATION >= 1 4 10 11 8 8 2 0 0 0 1 2 1 47 DAYS WITH PRECIPITATION 9 15 12 14 12 4 1 1 0 1 9 6 84 GREATEST DAILY PRECIPITATION 8.0 20.9 17.7 21.5 26.0 1.0 1.0 0.5 0.0 1.0 9.0 5.0 26.0 DAY 9 5 2 13 29 1 28 17 ** 30 29 6 DAY WITH THUNDER STORM 0 1 2 4 5 4 0 0 0 0 0 0 16 DAYS WITH SNOW OR SLEET 8 5 2 0 0 0 0 0 0 0 1 3 19 DAYS WITH DUST 0 0 0 0 1 0 0 0 2 3 1 0 7 WIND DIRECTION (PREVAILING) 315 270 225 90 90 90 90 90 90 90 45 315 90 PREVAILING WIND SPEED(KNOTS) 4.3 6.3 7.3 7.0 6.3 9.0 9.1 7.1 8.1 6.9 7.6 4.5 7.6 PREVAILING WIND PERCENT 3.2 5.4 8.9 13.8 9.3 13.3 10.5 12.9 11.7 6.5 4.6 3.5 7.6 CALMS PERCENT OF WIND 87.9 77.9 69.4 65.8 75.8 63.8 61.3 71.4 74.6 84.3 78.6 90.4 74.9 NO. OF WIND OBSERVATION 248 222 248 240 248 240 248 248 240 230 196 230 2838 VECTOR WIND DIRECTION (MEAN) 336 348 213 85 109 55 21 99 101 114 256 304 80 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.1 0.6 0.8 0.3 0.8 0.7 0.7 0.7 0.3 R< 0.1 0.2 0.3 WIND STEADINESES (MEAN %) 20.0 7.7 28.6 36.4 20.0 29.6 23.3 36.8 38.9 30.0 1.6 40.0 17.6 WIND SPEED (MEAN KNOTS) 0.5 1.3 2.1 2.2 1.5 2.7 3.0 1.9 1.8 1.0 1.5 0.5 1.7 FASTEST WIND DIRECTION 100 70 250 60 240 70 320 330 100 220 150 240 240 FASTEST WIND SPEED (KNOTS) 10 14 17 23 31 19 19 17 16 17 25 12 31 DAY 6 4 22 22 29 19 15 28 4 1 14 12 DAYS WITH SKY CLEAR (0-2)/8 13 5 12 4 5 25 28 29 29 24 11 12 197 DAYS WITH P.CLOUDY (3-6)/8 10 12 7 17 19 5 3 2 1 6 12 14 108 DAYS WITH CLOUDY (7-8)/8 8 11 12 9 7 0 0 0 0 1 7 5 60 DAYS WITH VISIBILITY =< 2 KM 7 5 2 3 0 0 0 0 0 0 1 2 20 DURATION OF SUNSHINE HOURS 151.0 141.1 193.5 200.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 882.9 881.6 880.5 879.1 879.2 877.1 876.9 878.9 880.2 886.4 884.1 885.3 881.0 MAX. QFE PRESSURE IN HPA 892.9 889.8 889.1 887.8 887.1 885.7 882.6 883.1 888.8 893.0 891.6 891.2 893.0 DAY-HOUR 6- 6 9- 6 17- 6 1- 6 9- 6 23- 3 28- 3 31- 6 23- 6 17- 6 22- 6 27- 6 MIN. QFE PRESSURE IN HPA 871.2 874.5 869.4 871.8 873.5 871.7 872.3 873.3 875.2 877.8 869.9 877.6 869.4 DAY-HOUR 8-12 15-12 22- 0 21- 0 7- 9 19-12 13-12 12-15 14-12 1-12 14- 9 5-12 MEAN QNH PRESSURE IN HPA 1021.0 1019.5 1018.3 1016.7 1016.8 1014.5 1014.2 1016.5 1018.0 1024.9 1022.3 1023.6 1018.9 MAX. QNH PRESSURE IN HPA 1032.2 1028.8 1028.0 1026.5 1025.7 1024.1 1020.7 1021.2 1027.6 1032.4 1030.8 1030.3 1032.4 DAY-HOUR 6- 6 9- 6 17- 6 1- 6 9- 6 23- 3 28- 3 31- 6 23- 6 17- 6 22- 6 27- 6 MIN. QNH PRESSURE IN HPA 1007.8 1011.5 1005.8 1008.5 1010.4 1008.4 1009.1 1010.2 1012.3 1015.3 1006.4 1015.0 1005.8 DAY-HOUR 8-12 15-12 22- 0 21- 0 7- 9 19-12 13-12 12-15 14-12 1-12 14- 9 5-12 MEAN QFF PRESSURE IN HPA 1025.5 1021.3 1018.6 1012.9 1010.9 1006.0 1004.6 1008.0 1010.7 1022.8 1023.8 1026.1 1015.9 MAX. QFF PRESSURE IN HPA 1037.2 1030.8 1031.7 1024.9 1025.6 1017.9 1011.4 1014.4 1023.2 1032.1 1033.6 1033.7 1037.2 DAY-HOUR 19-18 9- 6 17- 6 1- 3 9-18 23- 6 29- 3 25- 3 23- 3 8- 3 30-15 6-18 MIN. QFF PRESSURE IN HPA 1012.1 1009.1 1005.2 1000.0 1002.5 997.1 998.9 1001.8 1002.9 1007.8 1006.5 1017.1 997.1 DAY-HOUR 9-12 3-12 22- 0 21- 0 23-15 19-12 13-12 12-12 14-12 1-12 14- 3 4-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 882.6 881.2 879.8 878.9 879.0 877.1 876.9 878.9 880.3 886.2 885.1 885.5 881.0 MAX. QFE PRESSURE IN HPA 890.6 888.2 886.9 886.9 885.9 885.0 881.2 882.6 886.5 891.6 890.1 889.9 891.6 DAY 6 9 17 1 10 23 28 31 23 17 22 27 MIN. QFE PRESSURE IN HPA 872.7 875.2 869.4 871.8 876.3 872.5 874.0 874.1 875.8 879.0 879.8 882.6 869.4 DAY 9 5 22 21 21 19 13 13 14 2 7 16 MEAN QNH PRESSURE IN HPA 1020.7 1019.1 1017.5 1016.5 1016.6 1014.5 1014.3 1016.5 1018.0 1024.7 1023.5 1023.9 1018.8 MAX. QNH PRESSURE IN HPA 1029.7 1027.0 1025.5 1025.5 1024.4 1023.4 1019.1 1020.7 1025.0 1030.8 1029.1 1028.9 1030.8 DAY 6 9 17 1 10 23 28 31 23 17 22 27 MIN. QNH PRESSURE IN HPA 1009.5 1012.3 1005.8 1008.5 1013.6 1009.3 1011.0 1011.1 1013.0 1016.6 1017.5 1020.7 1005.8 DAY 9 5 22 21 21 19 13 13 14 2 7 16 MEAN QFF PRESSURE IN HPA 1024.9 1020.5 1017.5 1012.6 1010.6 1006.1 1005.0 1008.0 1010.5 1022.1 1023.7 1025.4 1015.6 MAX. QFF PRESSURE IN HPA 1034.3 1028.9 1028.4 1023.0 1023.3 1017.3 1010.3 1011.6 1018.7 1029.0 1030.9 1032.9 1034.3 DAY 20 9 17 1 10 23 29 25 23 8 22 7 MIN. QFF PRESSURE IN HPA 1013.2 1011.0 1005.2 1000.0 1005.2 997.9 1000.9 1002.3 1004.2 1009.0 1015.3 1020.6 997.9 DAY 9 5 22 21 21 19 13 13 14 2 2 16 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 882.9 881.7 880.5 879.6 879.6 877.9 877.9 880.0 881.1 887.0 884.0 885.1 881.4 MAX. QFE PRESSURE IN HPA 891.2 888.9 887.6 887.2 886.2 885.7 882.6 883.0 888.4 892.1 890.9 890.2 892.1 DAY 6 9 17 1 10 23 28 31 23 17 21 27 MIN. QFE PRESSURE IN HPA 872.5 874.7 869.4 873.6 876.4 873.1 874.5 875.6 876.7 880.1 873.2 877.9 869.4 DAY 9 5 22 12 14 19 14 12 14 2 14 5 MEAN QNH PRESSURE IN HPA 1021.0 1019.6 1018.3 1017.3 1017.3 1015.4 1015.4 1017.7 1018.9 1025.6 1022.2 1023.5 1019.3 MAX. QNH PRESSURE IN HPA 1030.3 1027.7 1026.3 1025.8 1024.7 1024.1 1020.7 1021.1 1027.2 1031.3 1030.0 1029.2 1031.3 DAY 6 9 17 1 10 23 28 31 23 17 21 27 MIN. QNH PRESSURE IN HPA 1009.3 1011.8 1005.8 1010.5 1013.7 1010.0 1011.5 1012.8 1014.0 1017.8 1010.1 1015.4 1005.8 DAY 9 5 22 12 14 19 14 12 14 2 14 5 MEAN QFF PRESSURE IN HPA 1026.2 1021.9 1019.5 1014.0 1011.7 1007.0 1005.9 1009.6 1012.7 1024.8 1023.2 1026.8 1016.9 MAX. QFF PRESSURE IN HPA 1034.4 1030.7 1030.8 1024.9 1024.8 1017.9 1011.4 1014.4 1023.2 1032.1 1032.4 1033.6 1034.4 DAY 20 9 17 1 10 23 29 25 23 8 21 7 MIN. QFF PRESSURE IN HPA 1013.5 1010.7 1006.0 1002.7 1006.2 998.9 1001.3 1004.4 1006.6 1010.2 1006.5 1017.2 998.9 DAY 9 5 22 21 28 19 14 12 14 2 14 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 884.0 882.8 881.6 880.2 880.1 878.1 878.1 880.4 881.7 887.9 884.7 886.2 882.2 MAX. QFE PRESSURE IN HPA 892.9 889.8 889.1 887.8 887.1 885.7 882.2 883.1 888.8 893.0 891.6 891.2 893.0 DAY 6 9 17 1 9 23 28 31 23 17 22 27 MIN. QFE PRESSURE IN HPA 873.6 876.1 870.9 873.4 876.9 873.5 875.3 875.9 877.4 880.8 873.0 878.9 870.9 DAY 9 15 22 13 7 19 13 12 14 2 14 5 MEAN QNH PRESSURE IN HPA 1022.2 1020.9 1019.5 1018.0 1017.8 1015.6 1015.6 1018.2 1019.7 1026.6 1023.1 1024.7 1020.2 MAX. QNH PRESSURE IN HPA 1032.2 1028.8 1028.0 1026.5 1025.7 1024.1 1020.2 1021.2 1027.6 1032.4 1030.8 1030.3 1032.4 DAY 6 9 17 1 9 23 28 31 23 17 22 27 MIN. QNH PRESSURE IN HPA 1010.5 1013.3 1007.5 1010.3 1014.2 1010.4 1012.4 1013.1 1014.8 1018.6 1009.9 1016.5 1007.5 DAY 9 15 22 13 7 19 13 12 14 2 14 5 MEAN QFF PRESSURE IN HPA 1027.0 1023.0 1020.2 1014.3 1012.0 1007.1 1005.8 1009.6 1012.4 1024.3 1026.3 1027.8 1017.5 MAX. QFF PRESSURE IN HPA 1036.5 1030.8 1031.7 1024.6 1025.6 1017.9 1011.0 1013.6 1022.7 1031.3 1033.3 1033.5 1036.5 DAY 6 9 17 1 10 23 29 25 23 8 22 7 MIN. QFF PRESSURE IN HPA 1014.2 1013.5 1007.2 1004.9 1005.9 998.7 1002.3 1004.4 1006.0 1011.9 1016.2 1022.4 998.7 DAY 9 3 22 12 23 19 13 12 14 2 2 28 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 882.6 881.7 880.8 879.2 879.3 877.1 876.8 879.1 880.3 886.4 883.4 884.8 881.0 MAX. QFE PRESSURE IN HPA 891.8 888.4 888.0 886.0 886.6 884.4 880.7 881.5 887.1 891.3 889.9 889.2 891.8 DAY 6 9 17 1 9 23 27 25 23 17 30 26 MIN. QFE PRESSURE IN HPA 872.4 874.6 870.3 872.1 873.5 873.2 873.9 874.6 876.5 879.1 869.9 877.9 869.9 DAY 9 15 22 13 7 19 13 12 14 2 14 5 MEAN QNH PRESSURE IN HPA 1020.7 1019.7 1018.6 1016.8 1017.0 1014.5 1014.2 1016.7 1018.0 1024.9 1021.5 1023.2 1018.8 MAX. QNH PRESSURE IN HPA 1031.0 1027.2 1026.7 1024.5 1025.2 1022.7 1018.5 1019.4 1025.7 1030.4 1028.9 1028.1 1031.0 DAY 6 9 17 1 9 23 27 25 23 17 30 26 MIN. QNH PRESSURE IN HPA 1009.2 1011.7 1006.8 1008.8 1010.4 1010.1 1010.9 1011.7 1013.8 1016.7 1006.4 1015.4 1006.4 DAY 9 15 22 13 7 19 13 12 14 2 14 5 MEAN QFF PRESSURE IN HPA 1024.7 1021.0 1018.4 1012.5 1010.8 1005.8 1004.3 1007.9 1009.9 1021.5 1023.9 1025.2 1015.5 MAX. QFF PRESSURE IN HPA 1034.8 1029.2 1029.4 1021.7 1023.6 1016.4 1009.4 1012.0 1019.8 1029.7 1031.6 1031.3 1034.8 DAY 19 9 17 1 10 23 29 25 23 8 22 7 MIN. QFF PRESSURE IN HPA 1012.3 1010.4 1006.2 1004.3 1003.0 997.8 1001.1 1002.4 1003.7 1009.2 1014.2 1020.8 997.8 DAY 9 3 22 12 7 19 14 12 14 2 1 28 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 882.0 880.8 879.8 878.2 878.3 876.0 875.7 877.7 878.8 885.2 882.8 884.2 879.9 MAX. QFE PRESSURE IN HPA 891.1 887.7 886.7 884.2 885.9 883.0 880.4 880.5 885.2 890.3 889.1 888.3 891.1 DAY 6 9 17 1 9 23 28 18 23 16 30 6 MIN. QFE PRESSURE IN HPA 871.2 874.5 870.9 872.2 874.6 871.7 872.3 873.4 875.2 877.8 874.2 877.6 870.9 DAY 8 15 22 13 13 19 13 12 14 1 14 5 MEAN QNH PRESSURE IN HPA 1020.0 1018.6 1017.5 1015.7 1015.8 1013.2 1012.8 1015.1 1016.4 1023.6 1020.8 1022.5 1017.7 MAX. QNH PRESSURE IN HPA 1030.2 1026.4 1025.3 1022.5 1024.4 1021.1 1018.2 1018.3 1023.6 1029.3 1028.0 1027.1 1030.2 DAY 6 9 17 1 9 23 28 18 23 16 30 6 MIN. QNH PRESSURE IN HPA 1007.8 1011.5 1007.5 1009.0 1011.7 1008.4 1009.1 1010.3 1012.3 1015.3 1011.2 1015.0 1007.5 DAY 8 15 22 13 13 19 13 12 14 1 14 5 MEAN QFF PRESSURE IN HPA 1024.1 1019.9 1017.5 1011.8 1009.8 1004.9 1003.6 1006.5 1008.8 1020.7 1022.9 1024.4 1014.6 MAX. QFF PRESSURE IN HPA 1034.4 1028.0 1027.6 1020.2 1022.4 1014.6 1009.9 1010.5 1017.5 1028.2 1030.1 1030.2 1034.4 DAY 19 9 17 1 9 23 28 25 23 8 22 7 MIN. QFF PRESSURE IN HPA 1012.1 1009.1 1007.8 1003.6 1003.2 997.1 998.9 1001.8 1002.9 1007.8 1014.1 1019.1 997.1 DAY 9 3 9 21 23 19 13 12 14 1 1 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 882.8 881.3 880.2 878.4 878.6 876.0 875.6 877.6 879.1 885.8 883.6 884.9 880.3 MAX. QFE PRESSURE IN HPA 892.1 888.1 887.0 884.0 886.4 883.7 880.5 880.4 885.7 890.9 889.5 890.0 892.1 DAY 6 9 17 1 9 22 28 25 23 16 21 6 MIN. QFE PRESSURE IN HPA 872.5 875.3 873.2 873.1 874.2 871.8 872.7 873.3 875.2 878.0 875.6 877.9 871.8 DAY 8 3 22 13 23 19 13 12 14 1 10 4 MEAN QNH PRESSURE IN HPA 1020.9 1019.2 1017.9 1015.9 1016.1 1013.3 1012.8 1015.1 1016.8 1024.3 1021.7 1023.2 1018.1 MAX. QNH PRESSURE IN HPA 1031.3 1026.8 1025.6 1022.2 1024.9 1021.9 1018.3 1018.2 1024.1 1030.0 1028.4 1029.0 1031.3 DAY 6 9 17 1 9 22 28 25 23 16 21 6 MIN. QNH PRESSURE IN HPA 1009.3 1012.4 1010.1 1010.0 1011.2 1008.5 1009.5 1010.2 1012.3 1015.5 1012.8 1015.4 1008.5 DAY 8 3 22 13 23 19 13 12 14 1 10 4 MEAN QFF PRESSURE IN HPA 1026.0 1021.4 1019.0 1012.6 1010.5 1004.9 1003.4 1007.0 1010.5 1023.4 1022.8 1026.4 1015.7 MAX. QFF PRESSURE IN HPA 1036.2 1029.8 1029.3 1021.7 1024.5 1014.8 1010.0 1011.7 1020.2 1030.8 1033.6 1032.4 1036.2 DAY 19 9 17 1 9 22 28 25 23 8 30 6 MIN. QFF PRESSURE IN HPA 1014.3 1010.4 1007.8 1004.7 1002.5 997.4 999.7 1001.8 1004.5 1009.5 1010.2 1017.1 997.4 DAY 9 3 9 20 23 19 13 12 14 2 13 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 883.3 882.0 880.8 879.4 879.5 877.4 877.0 878.9 880.3 886.5 885.6 886.1 881.4 MAX. QFE PRESSURE IN HPA 892.0 888.8 888.2 884.7 886.9 885.3 881.5 882.0 886.1 891.7 890.4 890.5 892.0 DAY 6 9 17 24 9 22 27 28 23 16 21 6 MIN. QFE PRESSURE IN HPA 873.2 875.7 872.4 873.9 875.6 873.9 874.2 874.1 875.8 878.9 880.9 882.3 872.4 DAY 8 21 21 11 23 18 12 12 13 1 6 28 MEAN QNH PRESSURE IN HPA 1021.5 1020.0 1018.7 1017.0 1017.2 1014.8 1014.3 1016.5 1018.1 1025.1 1024.1 1024.6 1019.3 MAX. QNH PRESSURE IN HPA 1031.2 1027.6 1027.0 1023.0 1025.5 1023.7 1019.4 1020.0 1024.6 1030.9 1029.4 1029.5 1031.2 DAY 6 9 17 24 9 22 27 28 23 16 21 6 MIN. QNH PRESSURE IN HPA 1010.1 1012.9 1009.2 1010.9 1012.8 1010.9 1011.2 1011.1 1013.0 1016.5 1018.7 1020.3 1009.2 DAY 8 21 21 11 23 18 12 12 13 1 6 28 MEAN QFF PRESSURE IN HPA 1026.1 1022.1 1019.3 1013.2 1011.3 1006.3 1004.6 1007.9 1010.9 1022.9 1025.5 1027.1 1016.4 MAX. QFF PRESSURE IN HPA 1037.2 1029.9 1030.4 1022.8 1025.6 1016.6 1009.2 1011.7 1019.8 1030.5 1032.8 1033.7 1037.2 DAY 19 9 17 24 9 22 28 24 23 8 22 6 MIN. QFF PRESSURE IN HPA 1015.2 1013.0 1008.1 1004.6 1003.8 999.1 1001.5 1002.7 1004.4 1009.4 1016.6 1021.8 999.1 DAY 8 21 8 20 23 18 12 12 14 1 1 28 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 882.9 881.3 880.4 879.0 879.2 877.3 877.1 879.0 880.4 886.5 885.4 885.7 881.2 MAX. QFE PRESSURE IN HPA 891.3 888.9 887.8 884.1 886.5 885.1 881.0 882.9 885.7 891.9 890.1 889.9 891.9 DAY 6 9 17 24 9 22 27 28 22 16 21 6 MIN. QFE PRESSURE IN HPA 873.0 875.7 871.4 873.3 875.4 873.3 874.5 874.4 875.8 879.0 880.0 882.0 871.4 DAY 8 21 21 20 13 18 12 12 13 1 6 28 MEAN QNH PRESSURE IN HPA 1021.0 1019.2 1018.2 1016.6 1016.8 1014.6 1014.5 1016.6 1018.2 1025.0 1023.8 1024.2 1019.1 MAX. QNH PRESSURE IN HPA 1030.4 1027.7 1026.5 1022.3 1025.0 1023.5 1018.9 1021.0 1024.1 1031.1 1029.1 1028.9 1031.1 DAY 6 9 17 24 9 22 27 28 22 16 21 6 MIN. QNH PRESSURE IN HPA 1009.9 1012.9 1008.1 1010.2 1012.6 1010.2 1011.5 1011.4 1013.0 1016.6 1017.7 1020.0 1008.1 DAY 8 21 21 20 13 18 12 12 13 1 6 28 MEAN QFF PRESSURE IN HPA 1024.9 1020.6 1018.0 1012.2 1010.4 1005.8 1004.5 1007.8 1010.2 1021.9 1024.2 1025.7 1015.5 MAX. QFF PRESSURE IN HPA 1036.2 1029.8 1028.6 1021.1 1024.4 1017.1 1008.7 1012.5 1019.0 1028.8 1031.3 1032.9 1036.2 DAY 19 9 17 24 9 22 26 24 23 8 21 6 MIN. QFF PRESSURE IN HPA 1014.2 1012.3 1006.0 1002.2 1003.8 998.0 1001.6 1002.8 1003.7 1009.0 1015.6 1021.6 998.0 DAY 8 4 8 20 23 18 14 12 14 1 1 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.3 3.3 10.2 14.2 20.9 27.8 27.4 28.4 17.3 13.8 11.3 2.0 15.0 MINIMUN AIR TEMPERATURE (C) -2.2 -3.5 3.1 6.3 11.6 16.5 17.1 16.3 7.3 5.6 5.1 -2.8 6.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 0 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 11 11 0 0 0 0 0 0 0 0 0 15 37 DAYS WITH FREEZING MIN.<= 0 23 24 5 5 0 0 0 0 0 2 4 22 85 TEMPERATURE RECORDS LOWEST(C) -7.4 -10.0 -1.8 -3.8 6.2 11.0 10.6 12.2 3.0 -0.6 -2.0 -11.6 -11.6 DAY 11 20 3 6 8 6 16 19 8 26 11 8 MAXIMUM AIR TEMPERATURE (C) 8.1 8.6 16.6 22.1 28.3 33.6 35.2 34.9 26.2 20.7 18.5 8.6 21.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 11 30 31 31 3 0 0 0 110 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS HIGHEST(C) 15.8 16.4 24.2 33.2 32.6 38.8 38.5 39.2 32.4 26.4 23.4 17.6 39.2 DAY 5 28 22 26 14 17 7 1 1 20 5 20 DIF. BETWEEN (MAX.-MIN.) (C) 10.3 12.1 13.5 15.8 16.7 17.1 18.1 18.6 18.9 15.1 13.4 11.4 15.1 MEAN DAILY TEMP. (MDT) (C) 3.0 2.5 9.9 14.2 20.0 25.0 26.2 25.6 16.7 13.1 11.8 2.9 14.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 8.4 17.2 121.2 160.2 142.4 1.0 0.0 0.0 0.0 450.6 HEATING DEG. DAYS(BASE 18 0C) 466.5 432.7 252.5 139.1 10.9 0.0 0.0 0.0 52.3 150.8 186.8 467.4 2158.9 DEWPOINT (MEAN C) -2.1 -4.9 2.0 2.6 3.3 2.9 5.2 10.4 0.4 2.3 1.5 -4.2 1.6 MIXING RATIO (G/KG) 3.86 3.17 5.22 5.50 5.75 5.62 6.53 9.34 4.58 5.35 5.11 3.38 5.28 VAPOUR PRESSURE (HPA) 5.44 4.45 7.32 7.70 8.04 7.83 9.08 12.95 6.45 7.54 7.17 4.77 7.40 SATURATION DEF. (HPA) 2.64 3.84 5.86 10.32 18.17 31.04 28.97 27.44 14.62 9.30 7.01 2.89 13.51 RELATIVE HUMIDITY (MEAN %) 71 60 63 51 37 23 27 35 34 51 56 68 48 RELATIVE HUMIDITY (MAX. %) 91 85 90 80 62 40 43 50 48 76 80 89 70 RELATIVE HUMIDITY (MIN. %) 52 41 37 25 17 13 14 24 22 30 32 38 29 RELATIVE HUMIDITY (MEAN% 03UTC) 89 84 84 76 55 40 40 49 47 75 74 85 67 RELATIVE HUMIDITY (MEAN% 09UTC) 59 47 44 31 20 16 18 26 24 34 36 47 34 RELATIVE HUMIDITY (MEAN% 15UTC) 77 59 56 35 26 17 18 34 29 46 52 65 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 42.6 6.9 70.3 6.8 16.7 0.0 0.0 0.0 0.0 12.4 25.7 9.7 191.1 DAYS WITH PRECIPITATION >=10 0 0 3 0 1 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 5 0 3 0 2 0 0 0 0 1 3 0 14 DAYS WITH PRECIPITATION >= 1 8 1 9 3 2 0 0 0 0 3 4 3 33 DAYS WITH PRECIPITATION 13 13 17 7 6 1 0 0 0 9 7 5 78 GREATEST DAILY PRECIPITATION 9.0 3.0 28.2 3.0 10.4 0.0 0.0 0.0 0.0 8.0 9.2 4.5 28.2 DAY 3 4 13 19 1 ** ** ** ** 4 26 1 DAY WITH THUNDER STORM 0 1 2 0 3 0 0 0 0 0 2 0 8 DAYS WITH SNOW OR SLEET 3 4 2 0 0 0 0 0 0 0 0 2 11 DAYS WITH DUST 0 0 0 0 0 5 3 1 0 0 0 0 9 WIND DIRECTION (PREVAILING) 270 90 90 90 90 90 90 90 90 90 270 90 90 PREVAILING WIND SPEED(KNOTS) 6.9 6.2 7.6 6.9 7.1 12.3 11.4 11.5 8.4 6.0 4.8 8.0 9.5 PREVAILING WIND PERCENT 7.1 7.1 11.2 9.2 13.9 27.8 20.6 26.3 14.8 3.8 4.2 3.6 11.6 CALMS PERCENT OF WIND 81.3 77.1 67.8 70.8 66.1 61.7 57.9 61.1 76.1 88.6 79.6 85.5 72.9 NO. OF WIND OBSERVATION 155 140 214 240 230 162 228 167 230 185 240 248 2439 VECTOR WIND DIRECTION (MEAN) 265 129 67 169 118 89 104 95 107 81 3 134 99 VECTOR WIND MAGNITUDE(KNOTS) 1.0 0.3 0.7 0.2 0.5 3.1 2.4 3.0 1.2 0.1 0.1 0.1 0.8 WIND STEADINESES (MEAN %) 76.9 23.1 35.0 11.1 22.7 75.6 63.2 75.0 66.7 14.3 9.1 10.0 38.1 WIND SPEED (MEAN KNOTS) 1.3 1.3 2.0 1.8 2.2 4.1 3.8 4.0 1.8 0.7 1.1 1.0 2.1 FASTEST WIND DIRECTION 200 60 320 130 240 90 110 110 110 330 190 190 90 FASTEST WIND SPEED (KNOTS) 12 12 16 17 19 21 19 19 17 14 14 14 21 DAY 5 1 4 2 15 4 1 2 13 8 26 5 DAYS WITH SKY CLEAR (0-2)/8 13 8 7 6 16 24 31 31 28 17 13 13 207 DAYS WITH P.CLOUDY (3-6)/8 7 11 14 21 14 6 0 0 2 8 8 14 105 DAYS WITH CLOUDY (7-8)/8 11 9 10 3 1 0 0 0 0 6 9 4 53 DAYS WITH VISIBILITY =< 2 KM 2 1 3 0 0 1 0 0 0 1 1 0 9 DURATION OF SUNSHINE HOURS 150.2 158.9 200.4 257.8 323.6 364.2 393.4 371.2 323.2 251.2 205.6 194.6 3194.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 882.4 879.7 880.0 880.5 879.1 874.6 874.2 876.1 883.6 885.2 882.1 883.7 880.1 MAX. QFE PRESSURE IN HPA 892.7 889.8 886.9 892.5 885.1 880.7 878.6 880.9 891.4 890.3 888.9 892.4 892.7 DAY-HOUR 10- 6 18- 6 18- 6 5- 6 18-21 9- 6 13- 6 15- 6 23- 6 10- 6 2- 6 8- 6 MIN. QFE PRESSURE IN HPA 871.8 868.9 871.2 870.0 870.7 867.9 869.8 869.9 876.1 878.9 870.2 868.5 867.9 DAY-HOUR 16-15 1-15 12-12 2-15 1-15 22-15 20-12 1-12 1-12 14-12 26- 6 4- 9 MEAN QNH PRESSURE IN HPA 1020.4 1017.4 1017.7 1018.3 1016.7 1011.7 1011.2 1013.3 1021.8 1023.6 1020.0 1021.9 1017.8 MAX. QNH PRESSURE IN HPA 1032.0 1028.8 1025.5 1031.8 1023.5 1018.5 1016.2 1018.7 1030.6 1029.3 1027.7 1031.7 1032.0 DAY-HOUR 10- 6 18- 6 18- 6 5- 6 18-21 9- 6 13- 6 15- 6 23- 6 10- 6 2- 6 8- 6 MIN. QNH PRESSURE IN HPA 1008.5 1005.2 1007.8 1006.5 1007.3 1004.1 1006.3 1006.4 1013.3 1016.5 1006.7 1004.8 1004.1 DAY-HOUR 16-15 1-15 12-12 2-15 1-15 22-15 20-12 1-12 1-12 14-12 26- 6 4- 9 MEAN QFF PRESSURE IN HPA ****** ****** 1016.1 1014.6 1009.8 ****** 1001.2 ****** 1016.9 1021.3 1017.8 1024.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1026.2 1035.1 1018.9 ****** 1007.8 ****** 1026.0 1027.7 1025.2 1039.9 ****** DAY-HOUR **-** **-** 3-18 5- 6 19- 3 **-** 3- 3 **-** 23- 6 10- 3 20- 3 8- 3 MIN. QFF PRESSURE IN HPA ****** ****** 1003.1 1000.3 1000.6 ****** 995.7 ****** 1007.1 1012.1 1003.9 1000.7 ****** DAY-HOUR **-** **-** 8- 0 2-12 1-21 **-** 7-15 **-** 1-15 2- 9 26- 6 4- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 879.7 880.5 879.1 ****** 874.8 ****** 883.8 ****** 881.8 883.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** 884.4 888.9 884.6 ****** 877.6 ****** 889.9 ****** 887.5 890.3 ****** DAY ** ** 4 5 19 ** 2 ** 23 ** 3 8 MIN. QFE PRESSURE IN HPA ****** ****** 872.1 872.9 871.7 ****** 871.4 ****** 879.0 ****** 872.0 868.6 ****** DAY ** ** 8 3 2 ** 21 ** 3 ** 26 4 MEAN QNH PRESSURE IN HPA ****** ****** 1017.4 1018.3 1016.7 ****** 1011.8 ****** 1022.0 ****** 1019.8 1021.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1022.7 1027.7 1022.9 ****** 1015.0 ****** 1028.9 ****** 1026.2 1029.3 ****** DAY ** ** 4 5 19 ** 2 ** 23 ** 3 8 MIN. QNH PRESSURE IN HPA ****** ****** 1008.8 1009.7 1008.4 ****** 1008.1 ****** 1016.6 ****** 1008.7 1004.9 ****** DAY ** ** 8 3 2 ** 21 ** 3 ** 26 4 MEAN QFF PRESSURE IN HPA ****** ****** 1015.2 1014.3 1010.0 ****** 1001.7 ****** 1016.7 ****** 1017.0 1023.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1023.1 1030.2 1018.8 ****** 1005.9 ****** 1024.2 ****** 1022.5 1037.5 ****** DAY ** ** 4 6 19 ** 13 ** 23 ** 3 8 MIN. QFF PRESSURE IN HPA ****** ****** 1003.1 1001.2 1004.1 ****** 997.3 ****** 1008.9 ****** 1006.0 1000.7 ****** DAY ** ** 8 27 6 ** 21 ** 3 ** 26 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 882.3 879.9 880.2 881.2 879.7 876.0 875.5 877.1 884.4 885.7 882.3 883.9 880.7 MAX. QFE PRESSURE IN HPA 891.7 888.6 885.9 890.8 885.0 880.5 878.4 880.1 890.7 889.7 887.9 891.6 891.7 DAY 10 18 18 5 19 9 3 16 23 10 2 8 MIN. QFE PRESSURE IN HPA 872.0 871.6 873.0 874.2 872.4 871.2 871.8 871.6 878.6 880.3 870.5 869.6 869.6 DAY 17 9 13 2 2 22 8 3 1 15 26 4 MEAN QNH PRESSURE IN HPA 1020.3 1017.6 1018.0 1019.1 1017.4 1013.2 1012.7 1014.5 1022.7 1024.1 1020.3 1022.1 1018.5 MAX. QNH PRESSURE IN HPA 1030.9 1027.4 1024.4 1029.9 1023.4 1018.3 1015.9 1017.8 1029.8 1028.6 1026.6 1030.8 1030.9 DAY 10 18 18 5 19 9 3 16 23 10 2 8 MIN. QNH PRESSURE IN HPA 1008.7 1008.3 1009.9 1011.2 1009.2 1007.8 1008.5 1008.3 1016.2 1018.1 1007.0 1006.0 1006.0 DAY 17 9 13 2 2 22 8 3 1 15 26 4 MEAN QFF PRESSURE IN HPA 1023.8 1021.2 1017.3 1015.9 1010.8 1004.0 1003.0 1005.2 1018.7 1022.1 1019.1 1025.9 1015.6 MAX. QFF PRESSURE IN HPA 1035.9 1032.3 1025.2 1033.2 1018.9 1010.5 1007.8 1008.4 1025.9 1027.7 1025.2 1039.9 1039.9 DAY 10 19 4 5 19 9 3 16 23 10 20 8 MIN. QFF PRESSURE IN HPA 1009.6 1008.9 1007.1 1004.3 1003.8 997.4 997.6 997.0 1009.5 1013.9 1004.7 1003.4 997.0 DAY 17 9 12 27 6 22 8 3 1 16 26 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 883.4 880.9 881.0 881.8 880.1 876.1 875.6 877.5 885.0 886.4 883.1 884.8 881.3 MAX. QFE PRESSURE IN HPA 892.7 889.8 886.9 892.5 884.7 880.7 878.6 880.9 891.4 890.3 888.9 892.4 892.7 DAY 10 18 18 5 19 9 13 15 23 10 2 8 MIN. QFE PRESSURE IN HPA 874.9 872.3 872.7 874.0 873.6 871.4 872.1 872.0 879.0 881.4 870.2 869.3 869.3 DAY 17 9 15 2 1 5 8 2 1 15 26 4 MEAN QNH PRESSURE IN HPA 1021.6 1018.7 1018.9 1019.8 1017.8 1013.4 1012.8 1015.0 1023.3 1024.9 1021.2 1023.1 1019.2 MAX. QNH PRESSURE IN HPA 1032.0 1028.8 1025.5 1031.8 1023.0 1018.5 1016.2 1018.7 1030.6 1029.3 1027.7 1031.7 1032.0 DAY 10 18 18 5 19 9 13 15 23 10 2 8 MIN. QNH PRESSURE IN HPA 1012.0 1009.1 1009.5 1011.0 1010.5 1008.1 1008.8 1008.7 1016.6 1019.3 1006.7 1005.7 1005.7 DAY 17 9 15 2 1 5 8 2 1 15 26 4 MEAN QFF PRESSURE IN HPA ****** ****** 1017.2 1016.3 1011.1 ****** 1002.8 ****** 1018.7 ****** 1019.0 1026.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1024.7 1035.1 1018.9 ****** 1007.4 ****** 1026.0 ****** 1024.9 1039.4 ****** DAY ** ** 3 5 19 ** 13 ** 23 ** 2 8 MIN. QFF PRESSURE IN HPA ****** ****** 1010.4 1004.7 1003.8 ****** 997.6 ****** 1012.5 ****** 1003.9 1002.6 ****** DAY ** ** 8 27 1 ** 8 ** 3 ** 26 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 882.3 879.8 880.2 880.7 879.0 874.8 874.2 876.1 883.7 885.1 881.9 883.4 880.1 MAX. QFE PRESSURE IN HPA 890.6 888.4 885.9 892.3 883.8 879.7 877.1 879.7 890.3 889.3 887.8 890.8 892.3 DAY 10 18 18 5 21 8 13 15 23 10 2 8 MIN. QFE PRESSURE IN HPA 875.1 871.1 871.6 873.4 872.4 869.2 871.1 870.7 878.0 880.4 870.9 868.5 868.5 DAY 25 12 15 2 1 29 8 2 1 15 26 4 MEAN QNH PRESSURE IN HPA 1020.4 1017.5 1017.9 1018.6 1016.7 1011.9 1011.2 1013.3 1021.9 1023.5 1019.9 1021.6 1017.9 MAX. QNH PRESSURE IN HPA 1029.7 1027.2 1024.4 1031.6 1022.0 1017.4 1014.5 1017.4 1029.3 1028.2 1026.5 1029.9 1031.6 DAY 10 18 18 5 21 8 13 15 23 10 2 8 MIN. QNH PRESSURE IN HPA 1012.2 1007.7 1008.3 1010.3 1009.2 1005.6 1007.7 1007.3 1015.5 1018.2 1007.5 1004.8 1004.8 DAY 25 12 15 2 1 29 8 2 1 15 26 4 MEAN QFF PRESSURE IN HPA ****** ****** 1015.6 1014.4 1009.4 ****** 1000.8 ****** 1016.5 ****** 1017.1 1023.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1023.7 1034.6 1017.0 ****** 1005.4 ****** 1024.0 ****** 1023.0 1036.5 ****** DAY ** ** 3 5 19 ** 13 ** 22 ** 2 8 MIN. QFF PRESSURE IN HPA ****** ****** 1008.7 1002.7 1001.5 ****** 996.8 ****** 1008.9 ****** 1006.0 1001.5 ****** DAY ** ** 8 27 6 ** 8 ** 3 ** 26 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 881.9 878.7 879.0 879.4 877.9 873.3 872.7 874.6 882.3 884.2 881.3 882.9 879.0 MAX. QFE PRESSURE IN HPA 889.2 886.3 884.3 890.9 882.5 878.3 875.6 877.9 889.0 888.4 886.7 889.6 890.9 DAY 10 18 18 5 21 8 13 15 23 10 2 8 MIN. QFE PRESSURE IN HPA 872.9 869.5 871.2 870.1 871.3 868.0 869.8 869.9 876.1 878.9 871.5 869.7 868.0 DAY 16 1 12 2 1 22 20 1 1 14 26 4 MEAN QNH PRESSURE IN HPA 1019.9 1016.3 1016.6 1017.1 1015.4 1010.2 1009.6 1011.7 1020.3 1022.4 1019.2 1021.0 1016.6 MAX. QNH PRESSURE IN HPA 1028.1 1024.8 1022.6 1030.0 1020.5 1015.8 1012.8 1015.4 1027.9 1027.2 1025.3 1028.5 1030.0 DAY 10 18 18 5 21 8 13 15 23 10 2 8 MIN. QNH PRESSURE IN HPA 1009.7 1005.9 1007.8 1006.6 1007.9 1004.2 1006.3 1006.4 1013.3 1016.5 1008.2 1006.1 1004.2 DAY 16 1 12 2 1 22 20 1 1 14 26 4 MEAN QFF PRESSURE IN HPA ****** ****** 1014.5 1013.1 1008.8 ****** 999.5 ****** 1015.1 ****** 1016.4 1023.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1022.4 1032.7 1015.6 ****** 1004.0 ****** 1022.9 ****** 1022.0 1035.9 ****** DAY ** ** 3 5 19 ** 13 ** 23 ** 19 8 MIN. QFF PRESSURE IN HPA ****** ****** 1008.0 1000.3 1000.9 ****** 995.9 ****** 1007.7 ****** 1006.1 1003.1 ****** DAY ** ** 8 2 6 ** 21 ** 3 ** 26 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 882.1 879.4 879.5 879.6 878.1 873.2 872.7 874.7 882.5 884.6 881.9 883.6 879.3 MAX. QFE PRESSURE IN HPA 889.6 887.1 885.1 890.9 882.4 878.0 875.7 877.6 889.0 888.7 886.2 889.8 890.9 DAY 9 18 3 5 18 8 2 15 23 10 2 7 MIN. QFE PRESSURE IN HPA 871.8 868.9 871.4 870.0 870.7 867.9 869.9 870.0 876.3 879.2 875.1 870.0 867.9 DAY 16 1 12 2 1 22 7 1 1 14 26 4 MEAN QNH PRESSURE IN HPA 1020.1 1017.0 1017.1 1017.2 1015.6 1010.1 1009.5 1011.8 1020.6 1022.9 1019.9 1021.8 1017.0 MAX. QNH PRESSURE IN HPA 1028.5 1025.7 1023.5 1030.0 1020.4 1015.5 1012.9 1015.0 1027.9 1027.5 1024.7 1028.8 1030.0 DAY 9 18 3 5 18 8 2 15 23 10 2 7 MIN. QNH PRESSURE IN HPA 1008.5 1005.2 1008.1 1006.5 1007.3 1004.1 1006.4 1006.5 1013.6 1016.8 1012.2 1006.5 1004.1 DAY 16 1 12 2 1 22 7 1 1 14 26 4 MEAN QFF PRESSURE IN HPA 1023.5 1020.5 1016.4 1014.1 1008.9 1000.9 999.8 1002.3 1016.5 1020.9 1018.7 1025.6 1014.0 MAX. QFF PRESSURE IN HPA 1033.4 1031.7 1025.8 1032.7 1016.1 1007.6 1004.4 1005.5 1024.4 1026.4 1023.8 1037.0 1037.0 DAY 10 18 3 5 19 8 2 31 22 10 19 8 MIN. QFF PRESSURE IN HPA 1011.1 1004.6 1004.1 1000.9 1002.1 993.2 995.7 995.2 1007.1 1013.3 1010.9 1005.1 993.2 DAY 16 1 12 2 1 22 7 2 1 2 26 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 880.5 880.6 879.4 ****** 874.0 ****** 883.7 ****** 882.3 884.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** 885.9 890.6 884.6 ****** 877.4 ****** 890.0 ****** 888.0 890.4 ****** DAY ** ** 3 5 18 ** 13 ** 22 ** 2 7 MIN. QFE PRESSURE IN HPA ****** ****** 873.0 871.7 871.3 ****** 870.6 ****** 878.1 ****** 876.2 870.3 ****** DAY ** ** 7 2 1 ** 20 ** 2 ** 25 4 MEAN QNH PRESSURE IN HPA ****** ****** 1018.4 1018.4 1017.1 ****** 1011.0 ****** 1021.9 ****** 1020.4 1022.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1024.4 1029.7 1022.9 ****** 1014.8 ****** 1029.0 ****** 1026.7 1029.4 ****** DAY ** ** 3 5 18 ** 13 ** 22 ** 2 7 MIN. QNH PRESSURE IN HPA ****** ****** 1009.9 1008.4 1007.9 ****** 1007.2 ****** 1015.6 ****** 1013.5 1006.8 ****** DAY ** ** 7 2 1 ** 20 ** 2 ** 25 4 MEAN QFF PRESSURE IN HPA ****** ****** 1016.5 1014.8 1010.1 ****** 1001.0 ****** 1016.9 ****** 1018.1 1025.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1026.2 1033.1 1018.8 ****** 1005.6 ****** 1024.8 ****** 1023.6 1037.2 ****** DAY ** ** 3 5 7 ** 13 ** 22 ** 10 7 MIN. QFF PRESSURE IN HPA ****** ****** 1005.9 1001.7 1002.2 ****** 997.3 ****** 1008.9 ****** 1009.4 1005.4 ****** DAY ** ** 7 26 1 ** 7 ** 2 ** 17 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 880.2 880.5 879.5 ****** 874.7 ****** 883.8 ****** 881.9 883.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** 885.5 890.1 885.1 ****** 877.4 ****** 890.0 ****** 887.6 890.9 ****** DAY ** ** 3 5 18 ** 13 ** 22 ** 2 7 MIN. QFE PRESSURE IN HPA ****** ****** 872.7 872.7 871.2 ****** 872.0 ****** 879.0 ****** 874.8 870.3 ****** DAY ** ** 7 2 1 ** 7 ** 2 ** 25 3 MEAN QNH PRESSURE IN HPA ****** ****** 1018.0 1018.3 1017.2 ****** 1011.7 ****** 1022.0 ****** 1019.9 1021.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1023.9 1029.1 1023.5 ****** 1014.8 ****** 1029.0 ****** 1026.3 1030.0 ****** DAY ** ** 3 5 18 ** 13 ** 22 ** 2 7 MIN. QNH PRESSURE IN HPA ****** ****** 1009.5 1009.5 1007.8 ****** 1008.7 ****** 1016.6 ****** 1011.9 1006.8 ****** DAY ** ** 7 2 1 ** 7 ** 2 ** 25 3 MEAN QFF PRESSURE IN HPA ****** ****** 1015.5 1014.0 1009.7 ****** 1001.2 ****** 1016.3 ****** 1017.1 1024.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1025.2 1032.2 1018.8 ****** 1005.4 ****** 1023.9 ****** 1022.6 1037.1 ****** DAY ** ** 3 5 18 ** 13 ** 22 ** 10 7 MIN. QFF PRESSURE IN HPA ****** ****** 1003.9 1001.3 1000.6 ****** 997.9 ****** 1009.1 ****** 1009.4 1002.8 ****** DAY ** ** 7 26 1 ** 7 ** 2 ** 25 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.3 3.9 7.8 13.8 18.4 24.1 28.6 26.5 20.2 13.1 9.3 1.6 14.2 MINIMUN AIR TEMPERATURE (C) -2.3 -1.6 1.8 7.6 9.0 13.7 18.3 16.0 10.7 4.6 0.9 -3.5 6.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 4 0 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 10 8 3 0 0 0 0 0 0 2 3 16 42 DAYS WITH FREEZING MIN.<= 0 27 21 11 1 0 0 0 0 0 9 16 26 111 TEMPERATURE RECORDS LOWEST(C) -7.0 -11.4 -6.6 -0.4 3.4 7.6 13.2 10.8 5.2 -7.6 -8.6 -8.4 -11.4 DAY 10 26 6 8 21 2 27 8 4 19 29 21 MAXIMUM AIR TEMPERATURE (C) 10.6 10.7 14.4 21.0 26.5 32.3 36.9 35.6 29.6 22.6 19.1 8.0 22.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 24 31 31 14 3 0 0 107 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.4 17.0 22.6 29.2 34.1 39.4 40.6 39.6 35.6 30.8 26.8 12.8 40.6 DAY 30 4 26 4 7 30 16 23 20 5 11 4 DIF. BETWEEN (MAX.-MIN.) (C) 12.9 12.3 12.6 13.4 17.5 18.6 18.6 19.6 18.9 18.0 18.2 11.5 16.0 MEAN DAILY TEMP. (MDT) (C) 4.2 4.6 8.1 14.3 17.8 23.0 27.6 25.8 20.2 13.6 10.0 2.3 14.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 7.3 69.7 205.5 147.5 24.7 0.2 0.0 0.0 454.9 HEATING DEG. DAYS(BASE 18 0C) 429.2 376.5 307.2 114.5 32.7 0.6 0.0 0.0 11.9 146.6 240.3 488.0 2147.5 DEWPOINT (MEAN C) -3.4 -2.3 -1.4 4.9 2.5 5.0 6.5 6.7 1.9 -3.0 -6.6 -4.7 0.5 MIXING RATIO (G/KG) 3.45 3.84 4.23 6.51 5.62 6.51 7.22 7.37 5.32 3.92 2.83 3.19 5.00 VAPOUR PRESSURE (HPA) 4.88 5.40 5.93 9.09 7.88 9.07 10.01 10.26 7.45 5.52 3.99 4.52 7.00 SATURATION DEF. (HPA) 3.26 3.20 5.33 7.62 14.50 22.69 31.08 26.50 18.14 11.34 9.25 2.64 12.96 RELATIVE HUMIDITY (MEAN %) 67 69 59 62 41 34 27 32 35 38 37 67 47 RELATIVE HUMIDITY (MAX. %) 90 90 87 84 71 58 44 48 55 61 58 89 70 RELATIVE HUMIDITY (MIN. %) 36 41 32 38 17 16 15 18 19 18 18 42 26 RELATIVE HUMIDITY (MEAN% 03UTC) 87 86 82 79 60 48 40 45 50 57 52 85 64 RELATIVE HUMIDITY (MEAN% 09UTC) 45 53 40 43 22 18 18 21 23 23 23 50 32 RELATIVE HUMIDITY (MEAN% 15UTC) 59 62 45 51 30 22 18 23 27 30 33 61 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 9.0 69.2 30.9 39.6 4.9 4.3 0.0 0.0 7.2 0.4 2.2 6.8 174.5 DAYS WITH PRECIPITATION >=10 0 2 1 1 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 0 5 2 2 0 0 0 0 1 0 0 0 10 DAYS WITH PRECIPITATION >= 1 3 8 6 6 2 1 0 0 2 0 1 3 32 DAYS WITH PRECIPITATION 8 9 8 15 4 3 0 0 2 2 3 9 63 GREATEST DAILY PRECIPITATION 4.1 20.0 12.0 13.0 2.0 4.0 0.0 0.0 5.2 0.4 1.2 2.1 20.0 DAY 18 24 18 16 1 28 ** ** 22 13 26 5 DAY WITH THUNDER STORM 0 0 3 2 3 3 0 0 1 0 1 0 13 DAYS WITH SNOW OR SLEET 3 3 0 0 0 0 0 0 0 0 2 3 11 DAYS WITH DUST 0 0 1 0 0 1 1 3 2 0 2 0 10 WIND DIRECTION (PREVAILING) 225 90 90 270 90 90 90 90 90 90 270 315 90 PREVAILING WIND SPEED(KNOTS) 5.7 6.0 5.2 8.2 7.3 9.0 9.8 9.2 7.2 7.7 7.8 4.7 8.1 PREVAILING WIND PERCENT 2.8 4.9 7.3 4.2 7.7 12.5 18.1 11.3 12.5 5.3 3.8 1.2 7.4 CALMS PERCENT OF WIND 88.3 81.3 84.3 82.9 78.6 75.0 72.6 73.4 76.3 85.4 84.6 96.4 81.6 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 247 240 248 2919 VECTOR WIND DIRECTION (MEAN) 246 59 145 208 120 103 99 72 129 134 290 28 103 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.2 0.2 0.2 0.2 1.0 2.0 1.0 0.6 0.2 0.2 R< 0.1 0.4 WIND STEADINESES (MEAN %) 14.3 16.7 22.2 18.2 12.5 55.6 80.0 47.6 35.3 18.2 22.2 13.7 30.8 WIND SPEED (MEAN KNOTS) 0.7 1.2 0.9 1.1 1.6 1.8 2.5 2.1 1.7 1.1 0.9 0.2 1.3 FASTEST WIND DIRECTION 80 20 90 250 100 80 90 310 260 250 200 100 90 FASTEST WIND SPEED (KNOTS) 16 14 31 16 16 19 19 17 16 19 25 10 31 DAY 22 8 14 6 12 14 8 13 20 12 26 23 DAYS WITH SKY CLEAR (0-2)/8 16 13 15 5 19 24 30 31 24 26 22 14 239 DAYS WITH P.CLOUDY (3-6)/8 10 9 12 10 9 6 1 0 6 5 8 7 83 DAYS WITH CLOUDY (7-8)/8 5 6 4 15 3 0 0 0 0 0 0 10 43 DAYS WITH VISIBILITY =< 2 KM 0 2 2 1 0 0 0 0 3 0 2 3 13 DURATION OF SUNSHINE HOURS 93.2 ****** ****** ****** ****** 195.6 363.3 349.5 287.4 304.0 254.6 171.6 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 883.6 881.4 880.4 878.9 880.6 876.1 873.6 876.7 879.6 883.7 882.9 885.1 880.2 MAX. QFE PRESSURE IN HPA 892.5 888.0 888.9 884.6 886.4 883.3 877.8 883.7 886.1 893.1 890.8 891.2 893.1 DAY-HOUR 7- 6 17-18 3- 6 7- 6 26- 6 1- 6 4- 3 25- 6 13- 6 18- 6 16- 3 11- 6 MIN. QFE PRESSURE IN HPA 876.1 873.4 867.7 872.0 875.0 868.6 866.7 871.8 873.1 875.5 867.6 879.1 866.7 DAY-HOUR 1-12 5-12 26-12 24-21 8- 0 30-21 1-12 3-12 19-12 12-12 26- 0 4-12 MEAN QNH PRESSURE IN HPA 1021.8 1019.3 1018.2 1016.5 1018.4 1013.4 1010.5 1014.1 1017.2 1021.9 1021.0 1023.5 1018.0 MAX. QNH PRESSURE IN HPA 1031.8 1026.7 1027.7 1022.9 1024.9 1021.4 1015.3 1021.9 1024.6 1032.5 1029.9 1030.3 1032.5 DAY-HOUR 7- 6 17-18 3- 6 7- 6 26- 6 1- 6 4- 3 25- 6 13- 6 18- 6 16- 3 11- 6 MIN. QNH PRESSURE IN HPA 1013.3 1010.3 1003.9 1008.7 1012.1 1004.9 1002.8 1008.5 1010.0 1012.7 1003.8 1016.7 1002.8 DAY-HOUR 1-12 5-12 26-12 24-21 8- 0 30-21 1-12 3-12 19-12 12-12 26- 0 4-12 MEAN QFF PRESSURE IN HPA 1024.0 1021.1 1017.8 1012.8 1012.6 1004.8 999.7 1004.2 1010.6 1019.0 1020.0 1026.6 1014.4 MAX. QFF PRESSURE IN HPA 1035.1 1030.6 1030.9 1022.2 1022.2 1015.5 1006.1 1013.3 1020.4 1035.2 1034.3 1036.4 1036.4 DAY-HOUR 7- 6 17-18 5-18 7- 6 28-18 1- 6 25- 3 25- 6 22- 6 18- 6 28- 3 11- 3 MIN. QFF PRESSURE IN HPA 1013.6 1008.5 999.2 1004.7 1002.6 992.6 991.2 997.5 1000.5 1005.7 999.6 1017.9 991.2 DAY-HOUR 17-12 9-12 26-12 24-21 8- 0 30-21 1-12 3-15 20-12 12-21 26- 0 4-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 883.4 881.3 879.9 878.4 880.3 876.4 873.7 876.9 879.5 883.7 882.5 885.0 880.1 MAX. QFE PRESSURE IN HPA 890.1 886.1 887.5 882.0 885.4 882.1 876.8 882.0 884.0 892.5 890.5 890.8 892.5 DAY 8 18 3 1 27 1 25 25 13 18 16 11 MIN. QFE PRESSURE IN HPA 877.6 874.2 870.1 872.4 875.0 871.4 868.4 873.1 875.3 877.6 867.6 881.0 867.6 DAY 12 9 26 25 8 30 1 23 20 13 26 26 MEAN QNH PRESSURE IN HPA 1021.5 1019.1 1017.7 1016.0 1018.0 1013.7 1010.7 1014.2 1017.2 1021.9 1020.5 1023.3 1017.8 MAX. QNH PRESSURE IN HPA 1029.1 1024.6 1026.2 1020.0 1023.8 1020.1 1014.1 1020.0 1022.2 1031.8 1029.5 1029.9 1031.8 DAY 8 18 3 1 27 1 25 25 13 18 16 11 MIN. QNH PRESSURE IN HPA 1015.0 1011.2 1006.6 1009.2 1012.1 1008.1 1004.7 1010.0 1012.4 1015.0 1003.8 1018.9 1003.8 DAY 12 9 26 25 8 30 1 23 20 13 26 26 MEAN QFF PRESSURE IN HPA 1023.0 1020.3 1017.0 1012.3 1012.3 1005.5 999.8 1004.3 1010.2 1018.7 1018.8 1025.9 1014.0 MAX. QFF PRESSURE IN HPA 1032.6 1028.4 1028.5 1019.1 1020.5 1014.6 1004.5 1010.0 1017.3 1033.0 1032.5 1034.6 1034.6 DAY 8 26 6 8 29 2 25 25 23 18 28 11 MIN. QFF PRESSURE IN HPA 1014.4 1008.8 1001.7 1004.9 1002.6 997.3 993.2 998.8 1001.8 1007.8 999.6 1018.7 993.2 DAY 18 9 26 25 8 23 1 23 21 13 26 26 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 883.7 881.7 880.5 879.1 881.2 877.2 874.5 877.6 880.3 884.3 883.1 885.3 880.7 MAX. QFE PRESSURE IN HPA 890.7 886.3 887.8 883.2 885.7 882.6 877.8 883.2 885.2 892.7 890.8 890.9 892.7 DAY 7 12 3 7 26 1 4 25 13 18 16 11 MIN. QFE PRESSURE IN HPA 877.6 874.6 869.8 872.8 876.6 871.8 869.3 873.7 876.0 878.6 868.5 880.2 868.5 DAY 12 24 26 25 8 30 1 23 20 13 26 6 MEAN QNH PRESSURE IN HPA 1021.9 1019.6 1018.3 1016.8 1019.1 1014.6 1011.6 1015.1 1018.0 1022.6 1021.2 1023.7 1018.5 MAX. QNH PRESSURE IN HPA 1029.8 1024.8 1026.5 1021.3 1024.1 1020.7 1015.3 1021.3 1023.6 1032.0 1029.9 1030.0 1032.0 DAY 7 12 3 7 26 1 4 25 13 18 16 11 MIN. QNH PRESSURE IN HPA 1015.0 1011.7 1006.3 1009.6 1013.9 1008.5 1005.7 1010.6 1013.2 1016.2 1004.8 1018.0 1004.8 DAY 12 24 26 25 8 30 1 23 20 13 26 6 MEAN QFF PRESSURE IN HPA 1025.0 1022.1 1018.5 1013.5 1013.6 1006.0 1001.1 1005.7 1012.1 1020.9 1021.7 1027.8 1015.7 MAX. QFF PRESSURE IN HPA 1033.0 1029.8 1030.8 1020.5 1019.3 1015.0 1006.1 1013.2 1018.6 1034.9 1034.3 1036.4 1036.4 DAY 7 26 6 7 29 1 25 25 23 18 28 11 MIN. QFF PRESSURE IN HPA 1015.8 1010.9 1001.8 1006.1 1005.5 997.4 994.0 1000.4 1004.2 1010.5 1002.8 1020.3 994.0 DAY 18 24 26 25 8 30 17 23 21 13 26 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 884.9 882.6 881.5 879.9 881.6 877.4 874.7 878.1 880.9 885.1 884.1 886.3 881.4 MAX. QFE PRESSURE IN HPA 892.5 887.0 888.9 884.6 886.4 883.3 877.7 883.7 886.1 893.1 890.8 891.2 893.1 DAY 7 12 3 7 26 1 4 25 13 18 16 11 MIN. QFE PRESSURE IN HPA 879.1 875.7 870.2 873.9 876.8 872.3 869.5 874.8 876.4 879.3 872.4 881.6 869.5 DAY 12 24 26 25 8 30 1 3 19 12 26 6 MEAN QNH PRESSURE IN HPA 1023.3 1020.6 1019.5 1017.6 1019.5 1014.8 1011.7 1015.6 1018.8 1023.4 1022.3 1024.9 1019.3 MAX. QNH PRESSURE IN HPA 1031.8 1025.6 1027.7 1022.9 1024.9 1021.4 1015.1 1021.9 1024.6 1032.5 1029.9 1030.3 1032.5 DAY 7 12 3 7 26 1 4 25 13 18 16 11 MIN. QNH PRESSURE IN HPA 1016.7 1012.9 1006.7 1010.9 1014.1 1009.1 1005.9 1011.9 1013.7 1016.9 1009.2 1019.5 1005.9 DAY 12 24 26 25 8 30 1 3 19 12 26 6 MEAN QFF PRESSURE IN HPA 1025.9 1022.6 1019.3 1014.0 1013.6 1006.1 1000.9 1005.8 1012.1 1020.4 1021.3 1028.3 1015.8 MAX. QFF PRESSURE IN HPA 1035.1 1030.2 1030.0 1022.2 1020.2 1015.5 1005.5 1013.3 1020.4 1035.2 1033.8 1036.2 1036.2 DAY 7 18 6 7 26 1 25 25 22 18 28 11 MIN. QFF PRESSURE IN HPA 1017.4 1012.0 1003.1 1007.1 1005.4 998.0 993.8 1000.1 1004.4 1010.8 1008.0 1022.0 993.8 DAY 12 9 26 6 7 30 1 23 19 12 26 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 883.6 881.5 880.7 879.2 880.8 876.3 873.7 876.9 879.8 883.6 882.8 885.1 880.3 MAX. QFE PRESSURE IN HPA 891.6 887.1 888.3 883.6 886.1 882.1 877.0 882.4 885.0 891.8 889.4 889.8 891.8 DAY 7 12 3 7 28 1 28 25 13 25 15 11 MIN. QFE PRESSURE IN HPA 876.4 875.0 868.7 874.5 875.9 871.5 868.7 873.8 874.7 877.1 873.0 880.1 868.7 DAY 1 5 26 25 9 22 1 3 19 12 26 4 MEAN QNH PRESSURE IN HPA 1021.7 1019.5 1018.5 1016.8 1018.6 1013.5 1010.6 1014.2 1017.5 1021.8 1020.8 1023.5 1018.1 MAX. QNH PRESSURE IN HPA 1030.8 1025.7 1027.1 1021.8 1024.6 1020.1 1014.4 1020.4 1023.4 1031.0 1028.3 1028.8 1031.0 DAY 7 12 3 7 28 1 28 25 13 25 15 11 MIN. QNH PRESSURE IN HPA 1013.7 1012.1 1005.0 1011.5 1013.1 1008.2 1005.0 1010.8 1011.8 1014.5 1009.9 1017.8 1005.0 DAY 1 5 26 25 9 22 1 3 19 12 26 4 MEAN QFF PRESSURE IN HPA 1023.2 1020.6 1017.8 1012.9 1012.5 1004.7 999.5 1003.9 1010.2 1018.0 1018.9 1026.0 1014.0 MAX. QFF PRESSURE IN HPA 1034.3 1027.9 1028.3 1020.3 1021.0 1013.9 1003.9 1010.7 1018.9 1031.4 1031.2 1033.1 1034.3 DAY 7 18 3 7 28 1 25 25 22 18 28 11 MIN. QFF PRESSURE IN HPA 1014.4 1009.9 1000.3 1007.7 1004.2 997.3 993.0 999.1 1001.8 1007.7 1008.8 1019.6 993.0 DAY 17 5 26 6 7 30 16 23 19 12 26 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 882.6 880.5 879.6 878.1 879.7 875.1 872.2 875.4 878.4 882.5 881.9 884.1 879.2 MAX. QFE PRESSURE IN HPA 891.0 885.8 887.1 881.6 885.3 881.0 875.6 880.0 883.4 890.8 888.9 889.0 891.0 DAY 7 12 3 7 28 1 28 25 22 25 15 10 MIN. QFE PRESSURE IN HPA 876.1 873.4 867.7 874.2 875.0 869.8 866.7 871.8 873.1 875.5 875.5 879.1 866.7 DAY 1 5 26 16 9 30 1 3 19 12 25 4 MEAN QNH PRESSURE IN HPA 1020.7 1018.3 1017.2 1015.6 1017.4 1012.3 1009.0 1012.5 1015.9 1020.6 1019.9 1022.4 1016.8 MAX. QNH PRESSURE IN HPA 1030.1 1024.3 1025.7 1019.5 1023.7 1018.9 1012.8 1017.7 1021.6 1029.9 1027.7 1027.9 1030.1 DAY 7 12 3 7 28 1 28 25 22 25 15 10 MIN. QNH PRESSURE IN HPA 1013.3 1010.3 1003.9 1011.2 1012.1 1006.3 1002.8 1008.5 1010.0 1012.7 1012.7 1016.7 1002.8 DAY 1 5 26 16 9 30 1 3 19 12 25 4 MEAN QFF PRESSURE IN HPA 1022.2 1019.5 1016.5 1011.9 1011.7 1004.1 998.2 1002.6 1008.9 1017.4 1018.3 1024.9 1013.0 MAX. QFF PRESSURE IN HPA 1033.2 1026.1 1026.8 1018.2 1018.8 1013.1 1003.1 1007.9 1017.9 1028.3 1029.7 1031.6 1033.2 DAY 7 26 3 7 26 2 28 25 22 18 28 11 MIN. QFF PRESSURE IN HPA 1013.6 1008.5 999.2 1006.9 1003.7 995.7 991.2 997.6 1000.5 1006.1 1008.6 1018.7 991.2 DAY 17 9 26 5 7 30 1 3 20 12 11 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 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 883.2 881.0 879.9 878.4 879.8 874.9 872.3 875.4 878.5 883.0 882.7 884.7 879.5 MAX. QFE PRESSURE IN HPA 891.6 886.4 887.1 881.7 885.2 881.0 875.4 879.7 883.4 891.7 889.9 889.8 891.7 DAY 7 12 3 7 26 2 28 25 22 17 15 10 MIN. QFE PRESSURE IN HPA 877.6 873.6 869.3 874.0 875.7 869.2 866.7 871.9 873.5 875.7 875.3 879.1 866.7 DAY 1 5 26 24 8 30 1 3 19 12 25 4 MEAN QNH PRESSURE IN HPA 1021.4 1018.8 1017.6 1015.9 1017.5 1012.0 1009.0 1012.6 1016.0 1021.1 1020.7 1023.0 1017.1 MAX. QNH PRESSURE IN HPA 1030.8 1024.9 1025.7 1019.6 1023.6 1018.9 1012.6 1017.4 1021.6 1030.9 1028.9 1028.8 1030.9 DAY 7 12 3 7 26 2 28 25 22 17 15 10 MIN. QNH PRESSURE IN HPA 1015.0 1010.5 1005.7 1011.0 1012.9 1005.6 1002.8 1008.6 1010.4 1012.9 1012.4 1016.7 1002.8 DAY 1 5 26 24 8 30 1 3 19 12 25 4 MEAN QFF PRESSURE IN HPA 1024.4 1021.3 1017.7 1012.5 1012.0 1003.4 998.6 1003.2 1010.1 1019.4 1021.2 1027.1 1014.2 MAX. QFF PRESSURE IN HPA 1034.3 1028.4 1029.0 1019.6 1019.2 1012.7 1002.8 1009.3 1018.6 1031.9 1032.3 1035.0 1035.0 DAY 7 19 5 7 28 1 25 25 22 17 28 11 MIN. QFF PRESSURE IN HPA 1016.4 1009.6 1001.9 1006.6 1004.2 994.9 991.8 997.5 1001.4 1008.0 1010.5 1019.4 991.8 DAY 17 5 26 24 7 30 16 3 19 12 11 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 884.0 881.7 880.8 879.3 880.8 876.0 873.7 876.8 879.8 884.0 883.2 885.3 880.4 MAX. QFE PRESSURE IN HPA 891.4 888.0 888.1 882.6 886.3 881.6 876.4 881.3 883.8 892.8 890.6 891.1 892.8 DAY 7 17 5 30 26 1 28 24 12 17 15 10 MIN. QFE PRESSURE IN HPA 877.6 874.1 871.4 874.0 876.8 869.2 868.8 873.6 874.8 876.1 873.7 880.4 868.8 DAY 1 9 26 24 7 30 1 22 19 12 25 4 MEAN QNH PRESSURE IN HPA 1022.2 1019.6 1018.6 1016.9 1018.6 1013.2 1010.7 1014.1 1017.5 1022.2 1021.3 1023.7 1018.2 MAX. QNH PRESSURE IN HPA 1030.6 1026.7 1026.8 1020.7 1024.8 1019.5 1013.7 1019.2 1022.0 1032.1 1029.7 1030.2 1032.1 DAY 7 17 5 30 26 1 28 24 12 17 15 10 MIN. QNH PRESSURE IN HPA 1015.0 1011.1 1008.1 1011.0 1014.1 1005.6 1005.1 1010.5 1011.9 1013.3 1010.6 1018.2 1005.1 DAY 1 9 26 24 7 30 1 22 19 12 25 4 MEAN QFF PRESSURE IN HPA 1024.7 1021.6 1018.3 1013.2 1012.7 1004.4 999.8 1004.3 1010.9 1019.3 1020.5 1027.0 1014.7 MAX. QFF PRESSURE IN HPA 1034.6 1030.6 1030.9 1020.5 1022.2 1013.7 1004.7 1010.4 1019.7 1032.3 1032.2 1035.2 1035.2 DAY 7 17 5 7 28 1 25 25 22 17 27 10 MIN. QFF PRESSURE IN HPA 1016.4 1009.8 1004.9 1006.6 1005.4 992.7 993.1 999.2 1002.3 1006.7 1008.3 1018.8 992.7 DAY 1 5 26 24 6 30 16 3 19 12 11 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 883.8 881.4 880.5 878.8 880.6 876.0 874.0 877.0 879.6 883.9 882.9 885.1 880.3 MAX. QFE PRESSURE IN HPA 890.8 886.7 887.5 882.1 886.2 882.1 877.3 881.8 883.8 892.6 890.6 890.9 892.6 DAY 7 17 2 10 26 1 31 24 12 17 15 10 MIN. QFE PRESSURE IN HPA 877.9 874.0 870.3 872.0 875.4 868.6 869.2 873.5 875.2 876.6 869.4 880.5 868.6 DAY 1 8 26 24 8 30 16 22 19 12 25 4 MEAN QNH PRESSURE IN HPA 1022.0 1019.3 1018.3 1016.4 1018.5 1013.2 1011.0 1014.4 1017.3 1022.1 1021.0 1023.4 1018.1 MAX. QNH PRESSURE IN HPA 1029.9 1025.3 1026.2 1020.1 1024.7 1020.1 1014.7 1019.8 1022.0 1031.9 1029.7 1030.0 1031.9 DAY 7 17 2 10 26 1 31 24 12 17 15 10 MIN. QNH PRESSURE IN HPA 1015.4 1011.0 1006.8 1008.7 1012.6 1004.9 1005.6 1010.4 1012.3 1013.9 1005.8 1018.3 1004.9 DAY 1 8 26 24 8 30 16 22 19 12 25 4 MEAN QFF PRESSURE IN HPA 1023.5 1020.5 1017.5 1012.3 1012.3 1004.1 999.8 1004.1 1010.1 1018.4 1019.2 1025.9 1014.0 MAX. QFF PRESSURE IN HPA 1033.7 1028.2 1029.8 1019.3 1021.5 1013.2 1004.8 1009.8 1017.7 1031.8 1032.3 1034.2 1034.2 DAY 7 17 5 7 28 1 31 25 22 17 27 10 MIN. QFF PRESSURE IN HPA 1015.3 1008.6 1003.5 1004.7 1004.4 992.6 992.6 999.1 1002.2 1005.7 1001.5 1017.9 992.6 DAY 17 8 26 24 7 30 16 22 20 12 25 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION NEYSHABOOR (40746) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 16 N LONGITUDE 58 48 E DATA PROCESSING CENTER ELEVATION 1213.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.4 4.0 7.0 14.4 21.3 27.6 29.0 27.0 24.3 13.8 6.3 4.6 15.0 MINIMUN AIR TEMPERATURE (C) -4.8 -1.1 2.3 6.6 10.7 15.7 17.4 14.3 12.8 5.6 -0.9 -1.7 6.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 1 1 0 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 17 9 0 0 0 0 0 0 0 0 5 10 41 DAYS WITH FREEZING MIN.<= 0 27 19 10 4 0 0 0 0 0 1 18 17 96 TEMPERATURE RECORDS LOWEST(C) -12.0 -9.6 -2.6 -2.5 2.4 9.0 14.8 3.6 5.4 -1.2 -5.8 -10.0 -12.0 DAY 15 4 1 5 3 18 12 31 1 3 19 6 MAXIMUM AIR TEMPERATURE (C) 7.0 9.9 11.9 20.3 26.2 32.5 33.7 33.0 32.5 22.9 14.9 12.8 21.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 7 23 30 25 24 0 0 0 109 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 16.0 16.0 21.2 28.0 34.0 38.2 36.2 37.6 38.6 29.5 23.4 19.2 38.6 DAY 6 10 31 23 31 3 8 27 9 14 8 29 DIF. BETWEEN (MAX.-MIN.) (C) 11.8 11.0 9.6 13.7 15.5 16.8 16.3 18.7 19.7 17.3 15.8 14.5 15.1 MEAN DAILY TEMP. (MDT) (C) 1.1 4.4 7.1 13.5 18.4 24.1 25.5 23.7 22.7 14.2 7.0 5.5 13.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 11.4 98.8 140.9 92.7 62.4 0.0 0.0 0.0 406.3 HEATING DEG. DAYS(BASE 18 0C) 525.0 394.1 337.4 141.4 33.3 0.0 0.0 2.0 0.3 121.0 329.8 386.8 2271.1 DEWPOINT (MEAN C) -5.9 -1.3 2.2 4.1 5.6 4.4 4.6 -0.3 3.2 -0.7 -3.1 -4.2 0.7 MIXING RATIO (G/KG) 2.95 4.10 5.25 6.26 6.71 6.30 6.19 4.60 5.73 4.49 3.51 3.32 4.95 VAPOUR PRESSURE (HPA) 4.16 5.77 7.35 8.75 9.38 8.79 8.64 6.44 8.01 6.32 4.98 4.70 6.94 SATURATION DEF. (HPA) 2.68 2.84 3.26 8.99 17.24 29.58 32.39 31.04 24.88 10.73 5.37 4.43 14.45 RELATIVE HUMIDITY (MEAN %) 66 72 75 55 40 26 23 20 31 43 56 57 47 RELATIVE HUMIDITY (MAX. %) 88 92 94 80 64 43 38 37 50 65 80 80 68 RELATIVE HUMIDITY (MIN. %) 39 48 53 35 26 17 15 11 15 23 31 31 29 RELATIVE HUMIDITY (MEAN% 03UTC) 82 85 90 78 63 43 38 37 48 61 77 75 65 RELATIVE HUMIDITY (MEAN% 09UTC) 49 56 62 42 31 19 18 14 19 29 35 38 34 RELATIVE HUMIDITY (MEAN% 15UTC) 58 68 73 51 36 23 18 15 23 35 50 51 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 17.9 33.0 98.1 25.2 14.0 0.8 0.0 0.0 0.0 0.9 9.0 1.3 200.2 DAYS WITH PRECIPITATION >=10 0 1 3 1 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 1 2 7 2 0 0 0 0 0 0 1 0 13 DAYS WITH PRECIPITATION >= 1 6 5 15 5 6 0 0 0 0 0 1 0 38 DAYS WITH PRECIPITATION 8 11 21 15 11 2 2 0 1 3 1 3 78 GREATEST DAILY PRECIPITATION 7.5 16.1 18.0 10.0 4.0 0.8 0.0 0.0 0.0 0.6 9.0 0.5 18.0 DAY 20 3 3 4 26