STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.6 6.3 8.3 18.0 20.6 29.6 33.9 29.5 26.3 20.6 14.7 6.1 18.0 MINIMUN AIR TEMPERATURE (C) -3.0 0.2 1.9 10.4 14.4 21.5 25.8 21.9 18.1 13.2 8.6 1.7 11.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 18 30 23 5 0 0 0 78 DAYS WITH MINIMUM TEMP. <=-4 11 2 4 0 0 0 0 0 0 0 0 2 19 DAYS WITH FREEZING MIN.<= 0 26 18 11 0 0 0 0 0 0 0 3 8 66 TEMPERATURE RECORDS LOWEST(C) -10.0 -5.4 -5.2 4.0 5.8 17.0 20.8 15.8 10.5 9.8 -3.0 -6.2 -10.0 DAY 26 13 11 3 2 9 27 31 29 16 27 29 MAXIMUM AIR TEMPERATURE (C) 5.2 10.8 12.7 22.7 25.3 34.3 38.5 34.1 30.9 25.1 19.1 9.4 22.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 7 30 31 27 20 0 0 0 116 DAYS WITH MAXIMUM TEMP. <= 0 6 0 0 0 0 0 0 0 0 0 0 0 6 TEMPERATURE RECORDS HIGHEST(C) 13.6 21.8 23.5 30.0 33.5 40.0 43.0 38.8 36.0 28.7 24.4 17.6 43.0 DAY 1 24 30 13 31 30 5 26 25 4 7 17 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 10.6 10.8 12.3 10.9 12.8 12.7 12.2 12.8 11.9 10.5 7.7 11.1 MEAN DAILY TEMP. (MDT) (C) 1.1 5.5 7.3 16.6 19.8 27.9 32.1 28.0 24.5 19.1 13.8 5.6 16.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.8 40.5 206.9 344.6 217.2 109.6 7.4 0.0 0.0 928.1 HEATING DEG. DAYS(BASE 18 0C) 524.2 361.8 330.7 60.5 37.0 0.0 0.0 0.0 0.0 14.2 126.0 385.7 1840.0 DEWPOINT (MEAN C) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** *** *** *** *** *** *** *** *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 9.7 3.0 21.3 12.5 57.4 3.5 3.3 5.0 0.0 0.0 0.0 38.6 154.3 DAYS WITH PRECIPITATION >=10 0 0 0 0 3 0 0 0 0 0 0 2 5 DAYS WITH PRECIPITATION >= 5 0 0 2 1 5 0 0 1 0 0 0 3 12 DAYS WITH PRECIPITATION >= 1 4 1 4 4 6 1 1 1 0 0 0 3 25 DAYS WITH PRECIPITATION 6 1 7 6 7 2 3 1 0 0 0 5 38 GREATEST DAILY PRECIPITATION 4.0 3.0 9.0 5.0 20.0 3.0 3.0 5.0 0.0 0.0 0.0 23.0 23.0 DAY 17 26 31 25 7 15 9 12 ** ** ** 4 DAY WITH THUNDER STORM 0 0 0 1 0 1 0 1 0 0 0 1 4 DAYS WITH SNOW OR SLEET 6 2 2 0 1 0 0 0 0 0 0 2 13 DAYS WITH DUST 1 1 0 0 0 0 2 0 1 1 4 0 10 WIND DIRECTION (PREVAILING) 315 180 315 315 360 360 45 45 45 180 180 180 45 PREVAILING WIND SPEED(KNOTS) 6.9 13.3 9.6 14.4 8.1 8.8 12.4 10.3 7.6 12.1 12.8 8.8 10.0 PREVAILING WIND PERCENT 11.0 13.1 12.9 9.3 10.3 14.0 32.9 45.5 27.3 16.8 18.0 15.1 15.5 CALMS PERCENT OF WIND 59.4 44.1 52.9 55.3 54.2 35.3 14.2 10.4 19.3 31.0 40.0 56.6 39.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 154 150 155 150 152 1826 VECTOR WIND DIRECTION (MEAN) 263 227 312 290 345 340 60 62 81 87 198 193 54 VECTOR WIND MAGNITUDE(KNOTS) 0.3 2.3 1.8 1.7 1.5 0.8 5.9 6.4 1.8 1.7 2.2 1.1 0.8 WIND STEADINESES (MEAN %) 9.1 35.4 43.9 31.5 27.8 10.5 56.2 72.7 25.7 27.0 34.4 32.4 12.9 WIND SPEED (MEAN KNOTS) 3.3 6.5 4.1 5.4 5.4 7.6 10.5 8.8 7.0 6.3 6.4 3.4 6.2 FASTEST WIND DIRECTION 170 210 290 230 180 200 90 70 180 60 190 210 210 FASTEST WIND SPEED (KNOTS) 25 39 21 29 29 27 39 23 19 19 31 23 39 DAY 16 21 10 22 6 17 20 1 8 27 23 27 DAYS WITH SKY CLEAR (0-2)/8 10 20 12 12 10 22 18 26 27 30 13 11 211 DAYS WITH P.CLOUDY (3-6)/8 14 7 14 14 16 6 13 5 3 1 14 14 121 DAYS WITH CLOUDY (7-8)/8 7 2 5 4 5 2 0 0 0 0 3 6 34 DAYS WITH VISIBILITY =< 2 KM 4 1 0 0 1 0 1 0 0 0 0 1 8 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** 351.3 316.2 284.0 200.2 157.6 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 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 0900 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 1200 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 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 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.9 6.9 11.0 19.4 24.2 30.8 30.7 30.0 27.6 17.6 9.9 8.4 18.3 MINIMUN AIR TEMPERATURE (C) -1.3 1.3 4.8 12.8 16.9 22.3 24.2 23.0 21.3 12.2 5.2 2.3 12.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 5 23 30 26 18 0 0 0 102 DAYS WITH MINIMUM TEMP. <=-4 3 1 0 0 0 0 0 0 0 0 0 1 5 DAYS WITH FREEZING MIN.<= 0 25 13 3 0 0 0 0 0 0 0 6 6 53 TEMPERATURE RECORDS LOWEST(C) -5.0 -4.8 -1.0 9.5 9.6 18.0 20.8 17.6 15.0 7.0 -2.8 -4.2 -5.0 DAY 9 17 23 14 8 6 19 4 28 9 30 1 MAXIMUM AIR TEMPERATURE (C) 6.1 11.1 15.3 23.7 28.7 35.6 36.8 36.3 34.1 23.7 15.5 12.5 23.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 14 30 31 31 29 2 0 0 139 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 17.6 22.0 23.2 31.8 34.4 39.4 40.2 40.2 38.6 33.0 24.5 16.6 40.2 DAY 29 28 31 20 27 18 3 14 3 1 1 29 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 9.8 10.5 10.9 11.8 13.3 12.6 13.3 12.8 11.5 10.3 10.2 11.2 MEAN DAILY TEMP. (MDT) (C) 2.4 6.2 10.1 18.3 22.8 28.9 30.5 29.7 27.7 17.9 10.3 7.4 17.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 11.7 79.6 237.9 294.6 269.1 200.2 11.5 0.0 0.0 1104.7 HEATING DEG. DAYS(BASE 18 0C) 483.2 330.7 245.8 28.1 3.3 0.0 0.0 0.0 0.0 30.7 229.5 328.4 1679.7 DEWPOINT (MEAN C) ***** ***** -2.8 1.5 1.9 2.5 6.6 2.6 -1.3 -4.7 -1.6 -3.1 ***** MIXING RATIO (G/KG) ****** ****** 3.85 5.24 5.22 5.76 7.26 5.47 4.17 3.31 4.15 3.52 ****** VAPOUR PRESSURE (HPA) ****** ****** 5.37 7.28 7.26 7.97 10.03 7.60 5.81 4.65 5.81 4.95 ****** SATURATION DEF. (HPA) ****** ****** 8.28 16.15 24.06 37.93 35.24 36.05 32.40 16.20 7.20 6.38 ****** RELATIVE HUMIDITY (MEAN %) *** *** 42 36 26 19 23 19 16 24 48 46 *** RELATIVE HUMIDITY (MAX. %) *** *** 64 52 41 27 33 27 23 34 65 59 *** RELATIVE HUMIDITY (MIN. %) *** *** 30 26 18 14 16 13 11 17 35 37 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** 57 49 38 27 32 25 22 30 59 58 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** 34 31 22 18 20 16 14 19 40 41 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** 41 33 23 16 17 14 14 21 43 47 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 35.5 12.5 26.9 24.0 2.7 0.0 0.0 0.0 0.0 0.0 3.3 4.0 108.9 DAYS WITH PRECIPITATION >=10 1 0 1 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 4 0 2 2 0 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 1 6 4 4 6 1 0 0 0 0 0 2 1 24 DAYS WITH PRECIPITATION 9 9 8 8 4 0 0 0 0 0 3 1 42 GREATEST DAILY PRECIPITATION 10.7 4.0 16.0 6.0 2.0 0.0 0.0 0.0 0.0 0.0 2.3 4.0 16.0 DAY 7 6 9 27 6 ** ** ** ** ** 27 16 DAY WITH THUNDER STORM 0 0 0 2 1 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 8 2 0 0 0 0 0 0 0 0 0 0 10 DAYS WITH DUST 1 0 2 4 7 2 1 3 2 0 2 0 24 WIND DIRECTION (PREVAILING) 180 315 45 180 315 45 45 45 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 9.5 8.9 10.5 13.1 10.5 11.9 12.0 11.3 11.9 10.6 10.9 8.8 11.1 PREVAILING WIND PERCENT 12.9 16.4 16.1 17.3 16.8 19.3 22.6 23.8 31.7 28.2 22.5 20.0 18.2 CALMS PERCENT OF WIND 56.8 40.7 38.7 20.0 18.7 10.0 19.4 18.1 17.9 34.3 47.5 58.1 30.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 248 248 240 248 240 155 2284 VECTOR WIND DIRECTION (MEAN) 227 282 53 265 337 25 66 78 133 145 202 191 93 VECTOR WIND MAGNITUDE(KNOTS) 1.2 1.3 0.4 1.1 1.8 3.8 4.5 4.4 3.6 2.1 2.9 1.2 0.7 WIND STEADINESES (MEAN %) 32.4 24.1 5.8 12.1 19.4 38.0 53.6 54.3 42.4 35.6 63.0 44.4 10.1 WIND SPEED (MEAN KNOTS) 3.7 5.4 6.9 9.1 9.3 10.0 8.4 8.1 8.5 5.9 4.6 2.7 6.9 FASTEST WIND DIRECTION 180 200 180 240 230 80 60 60 60 60 210 160 210 FASTEST WIND SPEED (KNOTS) 23 23 35 29 31 25 29 21 25 23 43 23 43 DAY 29 3 8 8 3 25 8 6 3 5 12 27 DAYS WITH SKY CLEAR (0-2)/8 15 10 10 7 5 28 28 25 29 19 13 15 204 DAYS WITH P.CLOUDY (3-6)/8 6 8 14 15 18 2 3 6 1 12 9 11 105 DAYS WITH CLOUDY (7-8)/8 10 10 7 8 8 0 0 0 0 0 8 5 56 DAYS WITH VISIBILITY =< 2 KM 5 2 0 1 0 0 0 0 0 0 4 1 13 DURATION OF SUNSHINE HOURS 153.3 166.3 218.3 232.4 270.4 381.2 374.5 350.8 187.7 ****** ****** 159.5 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 ****** ****** 874.7 873.4 873.6 870.5 870.0 871.7 873.3 880.2 877.9 879.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** 882.2 880.4 880.0 879.2 876.5 876.8 880.4 886.5 884.7 885.8 ****** DAY-HOUR **-** **-** 31- 6 1- 6 9- 6 23- 6 27- 6 31- 6 23- 6 17- 6 21- 6 26- 6 MIN. QFE PRESSURE IN HPA ****** ****** 866.9 866.9 867.9 864.4 863.6 864.2 867.2 872.7 867.0 871.3 ****** DAY-HOUR **-** **-** 5-15 12-15 31-12 3-15 12-15 12-15 3-15 2-12 14- 3 5-12 MEAN QNH PRESSURE IN HPA ****** ****** 1016.5 1015.1 1015.3 1011.7 1011.1 1013.1 1015.0 1022.7 1020.1 1021.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1025.0 1022.9 1022.5 1021.6 1018.5 1018.9 1022.9 1029.8 1027.8 1029.0 ****** DAY-HOUR **-** **-** 31- 6 1- 6 9- 6 23- 6 27- 6 31- 6 23- 6 17- 6 21- 6 26- 6 MIN. QNH PRESSURE IN HPA ****** ****** 1007.7 1007.7 1008.8 1004.9 1004.0 1004.6 1008.0 1014.2 1007.8 1012.7 ****** DAY-HOUR **-** **-** 5-15 12-15 31-12 3-15 12-15 12-15 3-15 2-12 14- 3 5-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.9 1001.4 1004.4 1017.2 1018.4 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1006.2 1008.5 1013.9 1024.5 1028.9 ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 27- 6 25- 3 23- 6 17- 6 30- 9 **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 991.2 992.7 995.7 1004.8 1002.6 ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 12-12 12-12 3-12 2-12 14- 0 **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 869.9 871.6 873.0 880.0 877.5 ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 874.4 875.3 877.8 884.6 883.3 ****** ****** DAY ** ** ** ** ** ** 27 31 16 17 21 ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 865.1 866.3 869.5 873.8 867.9 ****** ****** DAY ** ** ** ** ** ** 12 13 14 3 14 ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1011.1 1013.0 1014.6 1022.5 1019.6 ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1016.2 1017.2 1020.0 1027.7 1026.2 ****** ****** DAY ** ** ** ** ** ** 27 31 16 17 21 ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1005.7 1007.0 1010.6 1015.5 1008.8 ****** ****** DAY ** ** ** ** ** ** 12 13 14 3 14 ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.8 1001.1 1003.8 1016.7 1017.5 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.2 1006.8 1010.2 1022.6 1027.7 ****** ****** DAY ** ** ** ** ** ** 27 25 17 8 30 ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 992.6 994.5 998.0 1006.4 1002.6 ****** ****** DAY ** ** ** ** ** ** 12 12 4 3 14 ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 875.0 874.1 874.4 871.6 870.9 872.6 874.1 880.7 878.0 879.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** 880.9 879.8 879.6 879.0 875.7 876.2 879.1 885.6 883.6 884.8 ****** DAY ** ** 31 1 9 23 27 31 16 17 21 27 MIN. QFE PRESSURE IN HPA ****** ****** 867.0 869.9 870.7 868.3 866.0 867.1 870.5 874.9 867.0 873.0 ****** DAY ** ** 22 13 13 4 12 12 3 2 14 5 MEAN QNH PRESSURE IN HPA ****** ****** 1016.9 1015.9 1016.1 1013.0 1012.2 1014.2 1015.9 1023.3 1020.3 1022.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1023.5 1022.3 1022.0 1021.4 1017.6 1018.2 1021.5 1028.8 1026.6 1027.9 ****** DAY ** ** 31 1 9 23 27 31 16 17 21 27 MIN. QNH PRESSURE IN HPA ****** ****** 1007.8 1011.1 1012.0 1009.3 1006.7 1007.9 1011.8 1016.7 1007.8 1014.6 ****** DAY ** ** 22 13 13 4 12 12 3 2 14 5 MEAN QFF PRESSURE IN HPA ****** ****** 1015.7 1010.2 1008.1 1001.7 1000.1 1002.8 1005.9 1018.3 1018.9 1022.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1024.7 1016.9 1016.7 1012.2 1006.0 1008.5 1012.8 1024.3 1028.8 1028.8 ****** DAY ** ** 23 1 9 23 27 25 23 17 30 7 MIN. QFF PRESSURE IN HPA ****** ****** 1007.4 1004.7 1003.3 997.6 994.5 995.9 1000.0 1008.0 1003.0 1016.3 ****** DAY ** ** 8 21 29 16 12 12 3 2 14 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 ****** ****** 876.0 874.8 874.9 872.1 871.5 873.4 875.2 881.8 879.1 880.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** 882.2 880.4 880.0 879.2 876.5 876.8 880.4 886.5 884.7 885.8 ****** DAY ** ** 31 1 9 23 27 31 23 17 21 26 MIN. QFE PRESSURE IN HPA ****** ****** 869.5 870.1 870.8 869.1 866.9 867.8 870.7 876.3 871.1 873.8 ****** DAY ** ** 22 27 7 3 12 12 3 1 11 5 MEAN QNH PRESSURE IN HPA ****** ****** 1018.0 1016.6 1016.7 1013.6 1012.9 1015.0 1017.0 1024.5 1021.4 1023.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1025.0 1022.9 1022.5 1021.6 1018.5 1018.9 1022.9 1029.8 1027.8 1029.0 ****** DAY ** ** 31 1 9 23 27 31 23 17 21 26 MIN. QNH PRESSURE IN HPA ****** ****** 1010.6 1011.3 1012.1 1010.2 1007.7 1008.7 1012.0 1018.3 1012.4 1015.5 ****** DAY ** ** 22 27 7 3 12 12 3 1 11 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1000.7 1003.3 1006.5 1019.0 1019.7 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1006.2 1008.2 1013.9 1024.5 1028.9 ****** ****** DAY ** ** ** ** ** ** 27 24 23 17 30 ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 995.8 996.1 999.4 1008.7 1006.7 ****** ****** DAY ** ** ** ** ** ** 12 12 3 1 11 ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 875.1 873.7 874.0 871.0 870.5 872.4 873.9 880.5 877.9 879.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** 881.3 878.9 879.8 878.3 875.8 875.8 879.2 885.3 883.8 884.2 ****** DAY ** ** 31 16 9 23 27 30 23 17 21 26 MIN. QFE PRESSURE IN HPA ****** ****** 868.9 868.9 869.7 867.7 865.8 866.7 869.5 874.8 869.6 872.2 ****** DAY ** ** 12 13 31 3 12 12 3 1 11 5 MEAN QNH PRESSURE IN HPA ****** ****** 1017.0 1015.4 1015.7 1012.3 1011.8 1013.9 1015.6 1023.0 1020.1 1021.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1024.0 1021.3 1022.3 1020.6 1017.7 1017.7 1021.6 1028.5 1026.8 1027.2 ****** DAY ** ** 31 16 9 23 27 30 23 17 21 26 MIN. QNH PRESSURE IN HPA ****** ****** 1010.0 1010.0 1010.9 1008.6 1006.5 1007.5 1010.6 1016.6 1010.7 1013.7 ****** DAY ** ** 12 13 31 3 12 12 3 1 11 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 999.4 1001.8 1004.7 1017.3 1018.1 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1005.9 1006.5 1011.9 1022.8 1028.9 ****** ****** DAY ** ** ** ** ** ** 27 24 23 17 30 ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 994.1 995.2 997.9 1007.0 1003.7 ****** ****** DAY ** ** ** ** ** ** 12 12 3 1 11 ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 873.6 872.2 872.5 869.1 868.9 870.6 872.1 879.1 877.2 878.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** 879.5 878.2 877.6 876.6 874.5 874.0 877.6 883.9 882.8 884.2 ****** DAY ** ** 30 16 9 22 27 30 23 17 21 26 MIN. QFE PRESSURE IN HPA ****** ****** 867.7 867.2 867.9 865.2 863.9 864.7 867.4 872.7 869.1 871.3 ****** DAY ** ** 8 13 31 3 12 12 3 2 13 5 MEAN QNH PRESSURE IN HPA ****** ****** 1015.3 1013.7 1014.0 1010.2 1010.0 1011.8 1013.6 1021.4 1019.3 1020.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1021.9 1020.5 1019.8 1018.7 1016.3 1015.7 1019.8 1026.9 1025.7 1027.2 ****** DAY ** ** 30 16 9 22 27 30 23 17 21 26 MIN. QNH PRESSURE IN HPA ****** ****** 1008.6 1008.0 1008.8 1005.8 1004.3 1005.2 1008.3 1014.2 1010.2 1012.7 ****** DAY ** ** 8 13 31 3 12 12 3 2 13 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 997.7 999.9 1002.8 1015.6 1017.3 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.5 1005.0 1010.2 1021.4 1026.5 ****** ****** DAY ** ** ** ** ** ** 27 25 23 8 30 ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 991.2 992.7 995.7 1004.8 1003.8 ****** ****** DAY ** ** ** ** ** ** 12 12 3 2 13 ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 ****** ****** 873.9 872.4 872.5 868.7 868.4 870.2 872.1 879.4 877.7 879.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** 879.4 878.5 877.3 876.1 873.8 874.2 877.3 884.3 883.2 884.6 ****** DAY ** ** 30 16 9 22 27 30 23 17 21 26 MIN. QFE PRESSURE IN HPA ****** ****** 866.9 866.9 868.9 864.4 863.6 864.2 867.2 872.7 869.2 872.7 ****** DAY ** ** 5 12 31 3 12 12 3 2 13 4 MEAN QNH PRESSURE IN HPA ****** ****** 1015.7 1013.9 1014.0 1009.7 1009.4 1011.4 1013.5 1021.8 1019.9 1021.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1021.8 1020.8 1019.4 1018.1 1015.5 1015.9 1019.4 1027.3 1026.1 1027.7 ****** DAY ** ** 30 16 9 22 27 30 23 17 21 26 MIN. QNH PRESSURE IN HPA ****** ****** 1007.7 1007.7 1010.0 1004.9 1004.0 1004.6 1008.0 1014.2 1010.3 1014.2 ****** DAY ** ** 5 12 31 3 12 12 3 2 13 4 MEAN QFF PRESSURE IN HPA ****** ****** 1014.4 1008.2 1005.9 998.3 997.3 1000.0 1003.5 1016.8 1018.7 1022.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1023.1 1014.5 1014.1 1008.9 1004.2 1005.3 1010.9 1022.8 1028.3 1028.3 ****** DAY ** ** 23 16 9 22 27 25 23 17 30 6 MIN. QFF PRESSURE IN HPA ****** ****** 1004.2 999.8 1000.0 992.4 991.6 992.7 996.1 1005.6 1005.9 1015.0 ****** DAY ** ** 5 20 31 15 12 12 3 2 10 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 869.7 871.6 873.3 880.3 878.0 ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 874.9 875.8 877.8 885.0 883.7 ****** ****** DAY ** ** ** ** ** ** 27 30 23 17 21 ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 865.2 866.1 868.6 873.8 867.7 ****** ****** DAY ** ** ** ** ** ** 12 12 3 2 13 ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1010.8 1013.0 1014.9 1022.9 1020.2 ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1016.7 1017.7 1020.0 1028.1 1026.7 ****** ****** DAY ** ** ** ** ** ** 27 30 23 17 21 ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1005.8 1006.8 1009.6 1015.5 1008.6 ****** ****** DAY ** ** ** ** ** ** 12 12 3 2 13 ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.6 1001.2 1004.4 1017.4 1018.7 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.7 1006.2 1010.9 1023.1 1027.0 ****** ****** DAY ** ** ** ** ** ** 27 24 23 17 29 ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 993.7 994.0 997.1 1005.7 1004.1 ****** ****** DAY ** ** ** ** ** ** 12 12 3 2 10 ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 869.9 871.6 873.2 880.2 877.9 ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 874.3 876.0 877.5 884.8 883.6 ****** ****** DAY ** ** ** ** ** ** 27 30 15 16 21 ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 865.2 866.0 868.6 874.0 867.2 ****** ****** DAY ** ** ** ** ** ** 12 12 3 2 13 ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1011.1 1013.1 1014.8 1022.7 1020.1 ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1016.1 1018.0 1019.7 1027.9 1026.6 ****** ****** DAY ** ** ** ** ** ** 27 30 15 16 21 ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1005.8 1006.7 1009.6 1015.7 1008.0 ****** ****** DAY ** ** ** ** ** ** 12 12 3 2 13 ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.7 1001.0 1004.0 1017.0 1018.3 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.2 1006.6 1010.4 1022.6 1027.9 ****** ****** DAY ** ** ** ** ** ** 26 24 16 8 29 ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 993.2 994.3 996.7 1006.8 1003.2 ****** ****** DAY ** ** ** ** ** ** 3 12 3 2 13 ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.6 8.1 14.1 20.6 25.1 30.8 33.9 33.6 24.8 19.5 15.3 5.4 19.9 MINIMUN AIR TEMPERATURE (C) 2.0 1.3 7.8 13.5 17.1 22.1 25.7 25.2 17.2 13.6 9.4 -0.8 12.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 5 22 31 31 4 0 0 0 93 DAYS WITH MINIMUM TEMP. <=-4 0 1 0 0 0 0 0 0 0 0 0 12 13 DAYS WITH FREEZING MIN.<= 0 6 10 0 0 0 0 0 0 0 0 0 17 33 TEMPERATURE RECORDS LOWEST(C) -2.2 -5.2 3.5 4.2 12.2 16.0 21.6 21.4 11.6 10.2 2.8 -10.2 -10.2 DAY 20 4 15 5 7 5 1 26 21 9 27 7 MAXIMUM AIR TEMPERATURE (C) 11.5 13.0 18.7 25.2 29.5 35.6 38.7 38.5 29.3 23.6 19.6 9.7 24.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 5 15 30 31 31 12 0 0 0 124 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.4 19.4 24.5 33.4 34.0 39.0 42.6 41.4 33.8 29.0 24.4 20.6 42.6 DAY 4 28 31 25 30 16 30 5 1 1 8 20 DIF. BETWEEN (MAX.-MIN.) (C) 9.5 11.7 10.9 11.7 12.4 13.5 13.0 13.3 12.1 10.0 10.2 10.5 11.6 MEAN DAILY TEMP. (MDT) (C) 6.8 7.2 13.2 19.3 23.3 28.8 32.2 31.8 23.2 18.6 14.5 4.5 18.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 25.3 83.6 235.0 346.8 335.6 75.1 4.7 0.0 0.0 1106.2 HEATING DEG. DAYS(BASE 18 0C) 348.4 303.1 148.8 28.8 0.5 0.0 0.0 0.0 0.0 14.2 111.3 419.5 1374.5 DEWPOINT (MEAN C) -3.4 -5.3 -3.1 -0.8 1.1 2.5 7.0 5.4 0.2 4.8 0.8 -7.2 0.2 MIXING RATIO (G/KG) 3.54 3.06 3.80 4.39 4.96 5.62 7.64 6.87 4.69 6.54 4.87 2.80 4.90 VAPOUR PRESSURE (HPA) 4.96 4.27 5.30 6.12 6.90 7.76 10.51 9.47 6.56 9.14 6.80 3.93 6.81 SATURATION DEF. (HPA) 5.84 7.07 11.46 19.30 25.96 37.86 44.15 43.94 25.79 14.08 11.05 5.68 21.01 RELATIVE HUMIDITY (MEAN %) 49 42 36 27 24 18 21 19 22 42 39 42 32 RELATIVE HUMIDITY (MAX. %) 65 59 53 43 37 26 33 26 30 54 51 56 44 RELATIVE HUMIDITY (MIN. %) 38 30 25 17 16 13 14 14 16 33 31 32 23 RELATIVE HUMIDITY (MEAN% 03UTC) 62 56 50 40 35 25 32 25 29 53 47 51 42 RELATIVE HUMIDITY (MEAN% 09UTC) 45 37 31 23 19 17 19 17 19 37 35 38 28 RELATIVE HUMIDITY (MEAN% 15UTC) 49 40 32 26 21 14 16 15 19 41 38 42 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 11.0 8.3 30.9 5.7 2.4 0.0 0.0 0.0 0.0 6.7 0.9 0.1 66.0 DAYS WITH PRECIPITATION >=10 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 1 1 1 0 0 0 0 0 0 1 0 0 4 DAYS WITH PRECIPITATION >= 1 3 2 5 3 2 0 0 0 0 2 0 0 17 DAYS WITH PRECIPITATION 5 4 7 5 3 0 0 0 0 4 2 3 33 GREATEST DAILY PRECIPITATION 5.0 6.0 19.0 2.0 1.0 0.0 0.0 0.0 0.0 5.0 0.8 0.1 19.0 DAY 24 19 27 28 1 ** ** ** ** 17 17 26 DAY WITH THUNDER STORM 0 0 1 3 1 0 0 0 0 1 0 0 6 DAYS WITH SNOW OR SLEET 1 1 0 0 0 0 0 0 0 0 0 2 4 DAYS WITH DUST 1 1 4 12 13 13 13 1 5 1 2 5 71 WIND DIRECTION (PREVAILING) 180 180 315 360 360 45 45 45 45 180 180 180 45 PREVAILING WIND SPEED(KNOTS) 12.1 9.3 8.4 7.4 8.0 12.3 12.7 12.6 9.5 10.7 13.4 10.7 10.5 PREVAILING WIND PERCENT 18.1 18.6 20.0 22.0 20.6 24.0 42.6 40.0 47.3 14.2 20.0 14.8 20.1 CALMS PERCENT OF WIND 41.3 31.4 28.4 18.0 20.6 13.3 14.2 14.8 18.0 45.8 46.7 54.2 28.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 180 200 253 306 21 53 57 64 61 72 202 217 72 VECTOR WIND MAGNITUDE(KNOTS) 1.0 0.6 0.7 0.7 0.2 3.6 7.7 7.0 4.1 1.0 3.6 2.4 1.4 WIND STEADINESES (MEAN %) 20.0 10.3 10.3 8.1 2.3 37.5 75.5 71.4 53.9 21.3 60.0 47.1 19.2 WIND SPEED (MEAN KNOTS) 5.0 5.8 6.8 8.6 8.6 9.6 10.2 9.8 7.6 4.7 6.0 5.1 7.3 FASTEST WIND DIRECTION 170 200 210 240 190 270 60 100 30 180 210 210 210 FASTEST WIND SPEED (KNOTS) 47 27 43 39 29 35 25 39 23 21 33 51 51 DAY 4 1 7 2 5 3 17 27 2 13 5 20 DAYS WITH SKY CLEAR (0-2)/8 12 17 14 14 16 28 27 30 27 10 13 20 228 DAYS WITH P.CLOUDY (3-6)/8 11 9 13 10 13 2 4 1 3 17 9 8 100 DAYS WITH CLOUDY (7-8)/8 8 2 4 6 2 0 0 0 0 4 8 3 37 DAYS WITH VISIBILITY =< 2 KM 2 0 0 1 0 1 0 0 1 0 0 1 6 DURATION OF SUNSHINE HOURS ****** ****** ****** 139.0 300.1 ****** 332.4 363.0 302.1 238.2 185.0 232.3 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 876.8 873.8 874.1 874.9 873.4 868.1 866.3 868.2 877.0 879.4 876.6 878.2 873.9 MAX. QFE PRESSURE IN HPA 886.2 882.8 880.5 886.0 879.5 874.5 872.1 874.0 885.7 885.6 884.8 885.2 886.2 DAY-HOUR 10- 6 19- 6 18- 6 5- 6 18- 6 9- 6 2- 6 15- 6 23- 6 9- 6 2- 6 8- 3 MIN. QFE PRESSURE IN HPA 864.4 863.6 863.6 866.0 866.2 861.8 861.0 862.4 868.6 873.0 867.0 863.2 861.0 DAY-HOUR 16-12 1- 6 12-12 2-12 1-12 4-12 20-15 2-15 2-12 2-12 26- 3 3-15 MEAN QNH PRESSURE IN HPA 1018.9 1015.5 1015.8 1016.7 1015.1 1009.0 1007.0 1009.1 1019.1 1021.8 1018.6 1020.5 1015.6 MAX. QNH PRESSURE IN HPA 1029.5 1025.7 1023.1 1029.3 1021.9 1016.3 1013.6 1015.7 1028.9 1028.8 1027.9 1028.4 1029.5 DAY-HOUR 10- 6 19- 6 18- 6 5- 6 18- 6 9- 6 2- 6 15- 6 23- 6 9- 6 2- 6 8- 3 MIN. QNH PRESSURE IN HPA 1004.9 1004.0 1004.0 1006.7 1006.9 1001.9 1001.0 1002.6 1009.6 1014.6 1007.8 1003.5 1001.0 DAY-HOUR 16-12 1- 6 12-12 2-12 1-12 4-12 20-15 2-15 2-12 2-12 26- 3 3-15 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 877.0 874.1 874.4 875.5 874.3 869.4 867.5 869.1 877.5 879.8 876.8 878.4 874.5 MAX. QFE PRESSURE IN HPA 885.5 881.2 878.9 883.7 879.0 873.8 871.8 873.0 884.6 884.8 882.7 885.2 885.5 DAY 10 20 19 5 18 9 2 16 23 10 2 8 MIN. QFE PRESSURE IN HPA 868.9 864.8 865.9 869.7 868.8 865.1 863.6 864.2 870.7 875.9 867.0 864.2 863.6 DAY 16 1 12 2 1 22 21 1 3 14 26 4 MEAN QNH PRESSURE IN HPA 1019.1 1015.8 1016.1 1017.4 1016.0 1010.5 1008.3 1010.2 1019.7 1022.2 1018.8 1020.7 1016.2 MAX. QNH PRESSURE IN HPA 1028.7 1023.9 1021.3 1026.7 1021.4 1015.5 1013.2 1014.6 1027.7 1027.9 1025.5 1028.4 1028.7 DAY 10 20 19 5 18 9 2 16 23 10 2 8 MIN. QNH PRESSURE IN HPA 1010.0 1005.3 1006.6 1010.9 1009.8 1005.7 1004.0 1004.6 1012.0 1017.9 1007.8 1004.6 1004.0 DAY 16 1 12 2 1 22 21 1 3 14 26 4 MEAN QFF PRESSURE IN HPA 1019.8 1016.3 1013.3 1011.3 1007.8 999.1 995.3 997.7 1011.7 1016.6 1015.4 1022.9 1010.6 MAX. QFF PRESSURE IN HPA 1030.8 1027.7 1019.6 1025.0 1014.1 1004.8 1002.4 1002.6 1022.1 1023.9 1023.0 1035.3 1035.3 DAY 10 19 17 5 18 9 2 16 23 10 10 8 MIN. QFF PRESSURE IN HPA 1009.4 1002.4 1003.6 1003.3 1003.0 993.3 990.0 990.2 1001.5 1010.7 1004.5 1001.5 990.0 DAY 5 1 7 26 13 22 21 1 3 2 26 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 878.0 875.1 875.5 876.2 874.8 869.8 867.9 869.9 878.5 880.8 878.0 879.3 875.3 MAX. QFE PRESSURE IN HPA 886.2 882.8 880.5 886.0 879.5 874.5 872.1 874.0 885.7 885.6 884.8 885.2 886.2 DAY 10 19 18 5 18 9 2 15 23 9 2 8 MIN. QFE PRESSURE IN HPA 869.1 863.6 867.9 868.9 869.6 865.8 864.3 864.7 872.3 876.5 869.7 864.9 863.6 DAY 16 1 12 2 1 22 21 1 1 2 26 4 MEAN QNH PRESSURE IN HPA 1020.3 1016.9 1017.4 1018.2 1016.6 1011.0 1008.8 1011.0 1020.8 1023.4 1020.2 1021.7 1017.2 MAX. QNH PRESSURE IN HPA 1029.5 1025.7 1023.1 1029.3 1021.9 1016.3 1013.6 1015.7 1028.9 1028.8 1027.9 1028.4 1029.5 DAY 10 19 18 5 18 9 2 15 23 9 2 8 MIN. QNH PRESSURE IN HPA 1010.2 1004.0 1008.8 1010.0 1010.7 1006.5 1004.8 1005.2 1013.8 1018.5 1010.9 1005.4 1004.0 DAY 16 1 12 2 1 22 21 1 1 2 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 877.0 874.0 874.6 875.3 873.6 868.4 866.7 868.5 877.4 879.5 876.6 878.2 874.1 MAX. QFE PRESSURE IN HPA 884.6 881.7 879.9 885.6 878.4 873.7 871.0 872.6 884.7 884.6 883.7 884.2 885.6 DAY 10 19 18 5 18 8 2 22 23 9 2 7 MIN. QFE PRESSURE IN HPA 865.9 864.1 866.6 867.4 868.4 864.7 863.5 863.9 871.0 874.4 869.5 864.6 863.5 DAY 16 1 7 2 1 22 7 1 1 2 26 4 MEAN QNH PRESSURE IN HPA 1019.1 1015.7 1016.4 1017.1 1015.3 1009.4 1007.5 1009.5 1019.6 1021.9 1018.6 1020.4 1015.9 MAX. QNH PRESSURE IN HPA 1027.7 1024.4 1022.4 1028.8 1020.7 1015.4 1012.3 1014.1 1027.8 1027.7 1026.7 1027.2 1028.8 DAY 10 19 18 5 18 8 2 22 23 9 2 7 MIN. QNH PRESSURE IN HPA 1006.6 1004.5 1007.4 1008.3 1009.4 1005.2 1003.9 1004.3 1012.3 1016.2 1010.6 1005.1 1003.9 DAY 16 1 7 2 1 22 7 1 1 2 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 875.8 872.7 872.9 873.6 872.3 866.5 864.9 866.8 875.8 878.2 875.5 877.3 872.7 MAX. QFE PRESSURE IN HPA 883.7 880.1 877.9 883.8 876.6 872.2 869.1 871.0 883.0 883.4 882.0 883.8 883.8 DAY 9 19 18 5 18 8 13 22 23 9 2 7 MIN. QFE PRESSURE IN HPA 864.4 865.6 863.6 866.0 866.2 861.8 861.6 862.5 868.6 873.0 869.4 863.7 861.6 DAY 16 12 12 2 1 4 20 2 2 2 26 4 MEAN QNH PRESSURE IN HPA 1017.8 1014.2 1014.4 1015.3 1013.8 1007.2 1005.4 1007.5 1017.7 1020.5 1017.4 1019.4 1014.2 MAX. QNH PRESSURE IN HPA 1026.7 1022.6 1020.1 1026.8 1018.7 1013.7 1010.2 1012.3 1025.9 1026.3 1024.8 1026.8 1026.8 DAY 9 19 18 5 18 8 13 22 23 9 2 7 MIN. QNH PRESSURE IN HPA 1004.9 1006.2 1004.0 1006.7 1006.9 1001.9 1001.7 1002.7 1009.6 1014.6 1010.5 1004.1 1001.7 DAY 16 12 12 2 1 4 20 2 2 2 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 876.5 873.4 873.0 873.8 872.2 866.2 864.4 866.6 875.8 878.8 876.1 878.1 872.9 MAX. QFE PRESSURE IN HPA 884.7 881.2 877.9 883.5 876.2 871.7 868.9 871.0 883.2 883.6 882.3 884.8 884.8 DAY 9 18 18 5 26 8 13 22 23 9 2 7 MIN. QFE PRESSURE IN HPA 866.2 867.5 865.2 866.9 866.3 862.0 861.0 862.4 868.7 873.2 869.6 863.2 861.0 DAY 16 12 12 2 1 28 20 2 2 2 25 3 MEAN QNH PRESSURE IN HPA 1018.5 1015.0 1014.6 1015.5 1013.7 1006.9 1004.9 1007.4 1017.8 1021.2 1018.1 1020.3 1014.5 MAX. QNH PRESSURE IN HPA 1027.8 1023.9 1020.1 1026.4 1018.2 1013.1 1010.0 1012.3 1026.1 1026.6 1025.1 1027.9 1027.9 DAY 9 18 18 5 26 8 13 22 23 9 2 7 MIN. QNH PRESSURE IN HPA 1006.9 1008.4 1005.8 1007.7 1007.0 1002.2 1001.0 1002.6 1009.7 1014.8 1010.7 1003.5 1001.0 DAY 16 12 12 2 1 28 20 2 2 2 25 3 MEAN QFF PRESSURE IN HPA 1019.1 1015.5 1011.7 1009.4 1005.3 995.5 991.8 994.9 1009.7 1015.5 1014.6 1022.5 1008.8 MAX. QFF PRESSURE IN HPA 1029.9 1027.4 1018.5 1025.6 1010.9 1002.6 998.8 1000.8 1020.2 1022.6 1021.6 1035.6 1035.6 DAY 9 18 17 5 18 8 2 22 23 9 10 7 MIN. QFF PRESSURE IN HPA 1006.8 1008.5 1001.2 1001.5 1000.6 990.8 987.3 989.1 999.3 1007.0 1006.4 1000.7 987.3 DAY 16 9 7 26 12 26 20 1 2 2 25 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.8 9.6 14.1 19.2 23.9 29.5 34.7 34.4 28.0 20.2 15.1 5.1 20.2 MINIMUN AIR TEMPERATURE (C) 2.1 3.7 7.4 13.0 17.1 21.9 27.0 25.7 20.4 13.2 8.3 0.5 13.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 20 31 31 18 1 0 0 101 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 8 4 0 0 0 0 0 0 0 0 4 16 32 TEMPERATURE RECORDS LOWEST(C) -2.2 -0.4 0.8 7.2 12.2 13.0 22.5 21.0 12.6 8.0 -1.8 -2.2 -2.2 DAY 24 16 6 7 9 1 1 10 22 18 30 22 MAXIMUM AIR TEMPERATURE (C) 13.0 13.7 18.6 23.4 28.3 34.3 39.5 39.1 32.9 24.8 19.9 8.4 24.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 12 26 31 31 25 5 0 0 130 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.0 19.8 28.6 29.5 34.5 40.6 43.5 41.6 36.4 33.8 26.7 13.6 43.5 DAY 17 8 25 3 7 22 16 6 9 4 11 1 DIF. BETWEEN (MAX.-MIN.) (C) 10.9 10.0 11.2 10.4 11.2 12.4 12.5 13.4 12.5 11.6 11.6 7.9 11.3 MEAN DAILY TEMP. (MDT) (C) 7.5 8.7 13.0 18.2 22.7 28.1 33.3 32.4 26.7 19.0 14.1 4.5 19.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.0 7.7 75.1 213.9 380.0 353.3 171.3 29.1 0.7 0.0 1232.2 HEATING DEG. DAYS(BASE 18 0C) 323.9 259.9 160.6 30.3 4.3 0.0 0.0 0.0 0.0 39.3 130.8 418.8 1367.9 DEWPOINT (MEAN C) -5.9 -7.2 -7.6 -0.6 1.4 5.9 1.4 7.1 0.8 -3.2 -8.5 -3.7 -1.7 MIXING RATIO (G/KG) 2.92 2.72 2.87 4.67 5.32 6.90 5.18 8.39 4.94 3.70 2.55 3.43 4.47 VAPOUR PRESSURE (HPA) 4.11 3.80 4.01 6.49 7.41 9.54 7.15 11.52 6.87 5.18 3.58 4.82 6.21 SATURATION DEF. (HPA) 7.55 8.58 12.76 16.46 23.35 33.10 49.60 44.17 32.33 19.73 14.67 4.16 22.20 RELATIVE HUMIDITY (MEAN %) 37 33 26 32 29 25 14 22 19 23 20 57 28 RELATIVE HUMIDITY (MAX. %) 47 46 41 49 40 35 20 29 28 32 26 70 39 RELATIVE HUMIDITY (MIN. %) 28 23 18 22 21 17 9 17 14 17 15 46 21 RELATIVE HUMIDITY (MEAN% 03UTC) 45 42 38 46 39 35 20 27 27 31 25 68 37 RELATIVE HUMIDITY (MEAN% 09UTC) 34 29 23 26 25 22 13 20 17 20 18 53 25 RELATIVE HUMIDITY (MEAN% 15UTC) 37 31 23 31 25 19 10 19 17 22 20 55 26 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 2.1 9.0 23.0 34.9 40.6 0.6 0.0 0.0 0.2 0.0 0.0 11.6 122.0 DAYS WITH PRECIPITATION >=10 0 0 1 0 1 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 0 1 1 4 2 0 0 0 0 0 0 1 9 DAYS WITH PRECIPITATION >= 1 1 2 2 6 5 0 0 0 0 0 0 4 20 DAYS WITH PRECIPITATION 1 5 7 10 5 2 0 0 1 0 0 6 37 GREATEST DAILY PRECIPITATION 2.1 6.1 21.0 9.0 31.0 0.6 0.0 0.0 0.2 0.0 0.0 6.6 31.0 DAY 1 24 21 23 29 6 ** ** 22 ** ** 12 DAY WITH THUNDER STORM 0 0 0 1 1 2 0 0 1 0 0 0 5 DAYS WITH SNOW OR SLEET 0 1 0 0 0 0 0 0 0 0 0 1 2 DAYS WITH DUST 0 1 4 6 7 4 13 1 3 4 2 2 47 WIND DIRECTION (PREVAILING) 180 180 180 180 360 360 45 45 45 180 180 180 45 PREVAILING WIND SPEED(KNOTS) 11.5 12.8 13.4 15.1 8.0 9.1 11.7 12.0 9.9 13.4 15.0 8.2 10.1 PREVAILING WIND PERCENT 19.4 16.4 15.5 15.3 17.4 20.7 31.6 36.8 26.7 16.1 18.0 8.4 15.1 CALMS PERCENT OF WIND 59.4 47.1 40.6 40.7 27.7 38.0 25.2 18.7 34.0 41.3 54.7 77.4 42.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 183 196 208 208 360 353 52 77 69 145 188 160 98 VECTOR WIND MAGNITUDE(KNOTS) 1.7 1.2 1.4 1.6 0.6 1.6 5.7 5.9 2.2 1.4 2.4 0.3 0.9 WIND STEADINESES (MEAN %) 45.9 20.7 22.6 24.2 7.6 25.0 64.8 56.7 31.4 23.3 43.6 18.8 14.3 WIND SPEED (MEAN KNOTS) 3.7 5.8 6.2 6.6 7.9 6.4 8.8 10.4 7.0 6.0 5.5 1.6 6.3 FASTEST WIND DIRECTION 250 210 320 270 300 180 60 180 210 190 180 330 270 FASTEST WIND SPEED (KNOTS) 23 35 37 39 31 27 31 27 27 23 31 16 39 DAY 12 8 17 21 13 6 28 26 20 22 11 4 DAYS WITH SKY CLEAR (0-2)/8 22 13 20 7 13 27 30 30 27 28 23 13 253 DAYS WITH P.CLOUDY (3-6)/8 7 11 5 12 10 3 1 1 3 3 6 8 70 DAYS WITH CLOUDY (7-8)/8 2 4 6 11 8 0 0 0 0 0 1 10 42 DAYS WITH VISIBILITY =< 2 KM 0 1 1 2 0 0 0 0 1 0 0 2 7 DURATION OF SUNSHINE HOURS 240.6 195.7 260.2 227.9 255.6 355.1 378.4 360.5 310.5 298.7 255.5 166.0 3304.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 878.2 875.4 874.5 873.3 874.9 870.1 865.9 869.6 873.0 877.7 877.4 879.3 874.1 MAX. QFE PRESSURE IN HPA 886.9 881.3 883.7 878.7 880.5 877.7 871.7 875.0 879.9 886.8 884.4 884.1 886.9 DAY-HOUR 7- 6 12- 6 3- 6 7- 6 26- 6 1- 6 4- 3 25- 6 22- 6 25- 6 16- 6 10- 6 MIN. QFE PRESSURE IN HPA 871.1 866.1 865.0 867.6 869.4 861.5 860.1 863.8 867.8 869.3 868.1 874.5 860.1 DAY-HOUR 11-12 23-12 26-12 16-12 10-15 22-12 16-15 22-15 20-12 12-12 25-15 4- 9 MEAN QNH PRESSURE IN HPA 1020.4 1017.3 1016.3 1015.0 1016.7 1011.3 1006.6 1010.7 1014.6 1019.9 1019.5 1021.6 1015.8 MAX. QNH PRESSURE IN HPA 1030.3 1024.0 1026.7 1021.0 1023.1 1019.9 1013.1 1016.8 1022.4 1030.2 1027.5 1027.1 1030.3 DAY-HOUR 7- 6 12- 6 3- 6 7- 6 26- 6 1- 6 4- 3 25- 6 22- 6 25- 6 16- 6 10- 6 MIN. QNH PRESSURE IN HPA 1012.4 1006.8 1005.5 1008.5 1010.5 1001.6 1000.0 1004.2 1008.7 1010.4 1009.0 1016.3 1000.0 DAY-HOUR 11-12 23-12 26-12 16-12 10-15 22-12 16-15 22-15 20-12 12-12 25-15 4- 9 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 878.4 875.7 874.9 874.0 875.6 871.3 866.8 870.3 873.8 878.2 877.8 879.4 874.7 MAX. QFE PRESSURE IN HPA 885.6 880.3 882.4 877.6 879.5 876.7 871.7 874.2 879.6 885.7 884.0 883.4 885.7 DAY 7 14 3 13 26 1 4 25 22 27 16 11 MIN. QFE PRESSURE IN HPA 872.6 867.3 867.2 870.3 872.1 865.4 862.3 866.5 869.7 873.1 872.6 875.1 862.3 DAY 12 5 26 17 11 22 17 23 20 12 26 4 MEAN QNH PRESSURE IN HPA 1020.7 1017.6 1016.7 1015.7 1017.5 1012.7 1007.6 1011.5 1015.5 1020.4 1020.0 1021.9 1016.5 MAX. QNH PRESSURE IN HPA 1028.8 1022.8 1025.2 1019.8 1021.9 1018.8 1013.1 1015.9 1022.0 1028.9 1027.0 1026.3 1028.9 DAY 7 14 3 13 26 1 4 25 22 27 16 11 MIN. QNH PRESSURE IN HPA 1014.1 1008.1 1008.0 1011.5 1013.6 1006.0 1002.5 1007.2 1010.9 1014.7 1014.1 1017.0 1002.5 DAY 12 5 26 17 11 22 17 23 20 12 26 4 MEAN QFF PRESSURE IN HPA 1021.0 1017.1 1014.0 1010.2 1009.4 1001.8 994.3 998.7 1005.8 1014.8 1017.2 1023.8 1010.7 MAX. QFF PRESSURE IN HPA 1029.8 1022.9 1024.1 1016.5 1015.2 1013.2 1000.6 1004.0 1017.1 1026.0 1027.2 1028.8 1029.8 DAY 7 14 3 7 29 1 4 25 22 27 28 11 MIN. QFF PRESSURE IN HPA 1010.2 1003.7 1001.0 1004.4 1004.2 992.2 987.9 994.3 1000.1 1006.7 1008.8 1016.9 987.9 DAY 17 5 26 19 7 22 17 8 19 5 11 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 879.5 876.6 876.0 874.8 876.3 871.7 867.4 871.1 874.7 879.3 878.7 880.4 875.5 MAX. QFE PRESSURE IN HPA 886.9 881.3 883.7 878.7 880.5 877.7 871.5 875.0 879.9 886.8 884.4 884.1 886.9 DAY 7 12 3 7 26 1 4 25 22 25 16 10 MIN. QFE PRESSURE IN HPA 873.8 866.3 867.3 870.7 873.0 865.1 863.3 867.7 870.7 873.4 873.3 875.2 863.3 DAY 12 5 26 19 11 22 16 3 20 12 24 4 MEAN QNH PRESSURE IN HPA 1022.0 1018.7 1018.0 1016.6 1018.3 1013.2 1008.3 1012.4 1016.5 1021.7 1021.0 1022.9 1017.4 MAX. QNH PRESSURE IN HPA 1030.3 1024.0 1026.7 1021.0 1023.1 1019.9 1012.9 1016.8 1022.4 1030.2 1027.5 1027.1 1030.3 DAY 7 12 3 7 26 1 4 25 22 25 16 10 MIN. QNH PRESSURE IN HPA 1015.5 1007.0 1008.1 1012.0 1014.6 1005.7 1003.6 1008.6 1012.0 1015.0 1014.9 1017.1 1003.6 DAY 12 5 26 19 11 22 16 3 20 12 24 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 878.2 875.8 875.1 873.8 875.2 870.5 866.5 870.2 873.4 878.0 877.5 879.3 874.5 MAX. QFE PRESSURE IN HPA 885.6 880.5 882.8 877.7 879.7 876.6 870.4 873.8 878.4 885.7 883.1 883.4 885.7 DAY 7 12 3 13 26 1 4 25 22 25 16 10 MIN. QFE PRESSURE IN HPA 872.4 867.1 867.4 869.6 871.7 863.9 862.6 867.2 869.3 871.9 871.5 874.5 862.6 DAY 11 5 26 16 7 22 16 8 20 12 25 4 MEAN QNH PRESSURE IN HPA 1020.5 1017.8 1017.0 1015.5 1017.1 1011.8 1007.3 1011.4 1015.0 1020.3 1019.6 1021.7 1016.2 MAX. QNH PRESSURE IN HPA 1028.8 1023.1 1025.7 1019.9 1022.2 1018.7 1011.6 1015.5 1020.7 1028.9 1026.0 1026.3 1028.9 DAY 7 12 3 13 26 1 4 25 22 25 16 10 MIN. QNH PRESSURE IN HPA 1013.9 1007.9 1008.3 1010.7 1013.1 1004.3 1002.8 1008.0 1010.4 1013.3 1012.9 1016.3 1002.8 DAY 11 5 26 16 7 22 16 8 20 12 25 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 877.1 874.2 873.3 872.0 873.8 868.7 864.8 868.4 871.7 876.4 876.2 878.3 872.9 MAX. QFE PRESSURE IN HPA 884.6 878.9 880.9 876.5 878.3 875.0 868.8 871.7 876.2 884.6 882.4 882.6 884.6 DAY 7 1 3 13 29 1 31 24 13 25 15 10 MIN. QFE PRESSURE IN HPA 871.1 866.1 865.0 867.6 869.7 861.5 861.0 864.8 867.8 869.3 868.3 874.7 861.0 DAY 11 23 26 16 10 22 10 22 20 12 25 4 MEAN QNH PRESSURE IN HPA 1019.2 1015.9 1014.9 1013.4 1015.5 1009.8 1005.3 1009.4 1013.1 1018.5 1018.1 1020.5 1014.5 MAX. QNH PRESSURE IN HPA 1027.7 1021.3 1023.5 1018.5 1020.6 1016.8 1009.8 1013.1 1018.2 1027.7 1025.2 1025.4 1027.7 DAY 7 1 3 13 29 1 31 24 13 25 15 10 MIN. QNH PRESSURE IN HPA 1012.4 1006.8 1005.5 1008.5 1010.9 1001.6 1001.0 1005.3 1008.7 1010.4 1009.3 1016.5 1001.0 DAY 11 23 26 16 10 22 10 22 20 12 25 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 877.7 874.8 873.5 872.2 873.6 868.2 864.2 868.1 871.8 876.7 876.9 879.0 873.1 MAX. QFE PRESSURE IN HPA 884.7 879.6 880.6 876.7 878.5 874.7 868.8 871.4 876.2 884.9 882.9 883.1 884.9 DAY 7 1 3 12 26 1 31 24 13 25 15 10 MIN. QFE PRESSURE IN HPA 872.4 868.4 865.5 867.9 869.4 861.6 860.1 863.8 868.3 871.0 868.1 876.0 860.1 DAY 11 5 26 17 10 22 16 22 19 12 25 4 MEAN QNH PRESSURE IN HPA 1019.9 1016.6 1015.2 1013.7 1015.3 1009.2 1004.7 1009.0 1013.2 1018.8 1019.0 1021.3 1014.6 MAX. QNH PRESSURE IN HPA 1027.8 1022.0 1023.2 1018.8 1020.8 1016.5 1009.8 1012.8 1018.2 1028.0 1025.8 1026.0 1028.0 DAY 7 1 3 12 26 1 31 24 13 25 15 10 MIN. QNH PRESSURE IN HPA 1013.9 1009.4 1006.1 1008.8 1010.5 1001.7 1000.0 1004.2 1009.3 1012.3 1009.0 1018.0 1000.0 DAY 11 5 26 17 10 22 16 22 19 12 25 4 MEAN QFF PRESSURE IN HPA 1020.0 1016.1 1012.4 1008.1 1007.2 998.1 991.4 996.1 1003.5 1013.2 1016.2 1023.2 1008.8 MAX. QFF PRESSURE IN HPA 1028.9 1021.4 1022.0 1013.4 1015.2 1009.3 997.0 1000.8 1011.3 1024.4 1026.5 1028.3 1028.9 DAY 7 13 3 12 29 1 31 24 22 25 27 19 MIN. QFF PRESSURE IN HPA 1012.4 1005.6 1000.3 1003.4 1002.3 988.0 985.2 990.4 998.6 1003.7 1005.4 1019.2 985.2 DAY 12 5 26 17 6 22 16 22 18 4 11 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.7 8.5 9.9 18.4 25.3 30.7 31.4 32.3 30.1 20.7 12.1 9.8 19.3 MINIMUN AIR TEMPERATURE (C) -1.7 3.5 5.0 11.5 17.7 22.4 23.9 24.2 21.8 13.1 6.1 3.8 12.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 7 21 30 28 22 0 0 0 108 DAYS WITH MINIMUM TEMP. <=-4 12 1 0 0 0 0 0 0 0 0 0 0 13 DAYS WITH FREEZING MIN.<= 0 19 3 1 0 0 0 0 0 0 0 0 2 25 TEMPERATURE RECORDS LOWEST(C) -10.6 -5.0 -1.0 3.4 13.4 18.0 20.5 19.8 18.0 9.2 0.8 -0.6 -10.6 DAY 16 6 1 6 2 28 16 4 24 19 13 3 MAXIMUM AIR TEMPERATURE (C) 6.2 12.6 13.5 23.4 29.6 35.4 35.7 36.7 34.6 25.4 15.9 13.7 23.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 12 30 31 31 28 2 0 0 134 DAYS WITH MAXIMUM TEMP. <= 0 6 0 0 0 0 0 0 0 0 0 0 0 6 TEMPERATURE RECORDS HIGHEST(C) 16.6 24.0 23.8 29.8 37.0 40.2 39.0 40.2 38.6 31.4 22.0 21.5 40.2 DAY 6 10 31 22 31 4 7 23 8 14 3 28 DIF. BETWEEN (MAX.-MIN.) (C) 7.9 9.1 8.5 11.9 11.9 13.0 11.8 12.5 12.8 12.3 9.8 9.9 11.0 MEAN DAILY TEMP. (MDT) (C) 2.2 8.0 9.2 17.4 23.7 28.9 29.8 30.4 28.2 19.3 11.0 8.7 18.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 8.6 91.4 237.1 272.4 292.7 216.7 10.3 0.0 0.0 1129.3 HEATING DEG. DAYS(BASE 18 0C) 488.5 290.1 271.5 56.2 0.0 0.0 0.0 0.0 0.0 16.9 210.1 287.6 1620.9 DEWPOINT (MEAN C) -5.4 0.3 0.1 0.5 6.8 5.2 6.8 2.6 0.4 -1.4 -2.5 -3.4 0.8 MIXING RATIO (G/KG) 3.06 4.57 4.61 4.85 7.26 6.79 7.48 5.59 4.71 4.18 3.67 3.57 5.03 VAPOUR PRESSURE (HPA) 4.30 6.37 6.42 6.76 10.08 9.39 10.34 7.75 6.55 5.85 5.16 5.01 7.00 SATURATION DEF. (HPA) 3.68 5.35 6.37 15.61 23.48 36.38 36.77 41.91 37.65 19.39 9.59 7.53 20.31 RELATIVE HUMIDITY (MEAN %) 59 60 57 34 33 23 23 17 16 25 37 42 36 RELATIVE HUMIDITY (MAX. %) 70 75 76 53 50 33 35 26 23 36 49 58 49 RELATIVE HUMIDITY (MIN. %) 49 47 44 23 24 16 16 12 12 18 31 32 27 RELATIVE HUMIDITY (MEAN% 03UTC) 66 69 73 51 49 32 35 26 22 34 46 54 46 RELATIVE HUMIDITY (MEAN% 09UTC) 57 56 51 29 28 20 20 15 14 23 33 34 32 RELATIVE HUMIDITY (MEAN% 15UTC) 59 60 55 32 31 19 18 13 14 23 38 42 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 22.1 84.2 60.5 16.1 6.3 6.0 0.0 0.0 0.0 2.0 0.0 7.0 204.2 DAYS WITH PRECIPITATION >=10 1 2 2 0 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 1 4 3 1 0 0 0 0 0 0 0 1 10 DAYS WITH PRECIPITATION >= 1 3 6 7 3 1 3 0 0 0 1 0 2 26 DAYS WITH PRECIPITATION 3 7 9 7 7 4 0 0 0 2 2 2 43 GREATEST DAILY PRECIPITATION 16.0 51.0 27.0 9.0 4.0 3.0 0.0 0.0 0.0 2.0 0.0 6.0 51.0 DAY 13 22 4 4 8 28 ** ** ** 10 ** 15 DAY WITH THUNDER STORM 0 0 0 0 5 0 0 0 0 0 0 0 5 DAYS WITH SNOW OR SLEET 3 3 0 0 0 0 0 0 0 0 0 0 6 DAYS WITH DUST 1 0 2 6 4 6 3 2 6 2 0 0 32 WIND DIRECTION (PREVAILING) 180 180 315 360 360 45 45 45 180 180 180 180 45 PREVAILING WIND SPEED(KNOTS) 11.4 13.6 8.6 7.1 7.9 13.6 12.1 13.1 12.3 10.0 10.5 13.0 10.8 PREVAILING WIND PERCENT 20.0 19.3 11.6 22.7 18.1 40.0 43.2 29.7 16.0 14.8 13.3 16.8 16.7 CALMS PERCENT OF WIND 64.5 55.2 45.8 22.0 38.1 12.7 19.4 23.2 35.3 54.8 55.3 54.8 40.1 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 174 198 285 299 46 55 58 53 85 162 213 168 71 VECTOR WIND MAGNITUDE(KNOTS) 1.8 2.4 0.9 1.3 1.2 5.7 6.9 5.7 0.7 1.1 0.6 1.7 1.3 WIND STEADINESES (MEAN %) 54.5 46.2 16.7 15.9 19.7 53.3 73.4 64.0 11.3 23.4 17.1 41.5 20.6 WIND SPEED (MEAN KNOTS) 3.3 5.2 5.4 8.2 6.1 10.7 9.4 8.9 6.2 4.7 3.5 4.1 6.3 FASTEST WIND DIRECTION 180 240 230 210 210 60 70 60 180 70 180 180 210 FASTEST WIND SPEED (KNOTS) 27 29 31 39 39 29 25 23 19 37 16 23 39 DAY 6 9 26 13 7 23 6 10 2 1 3 25 DAYS WITH SKY CLEAR (0-2)/8 14 12 9 14 13 24 24 24 29 29 19 16 227 DAYS WITH P.CLOUDY (3-6)/8 10 7 9 11 15 6 7 7 1 2 8 14 97 DAYS WITH CLOUDY (7-8)/8 7 10 13 5 3 0 0 0 0 0 3 1 42 DAYS WITH VISIBILITY =< 2 KM 1 2 1 0 0 0 0 0 5 0 0 0 9 DURATION OF SUNSHINE HOURS 183.0 158.2 184.4 273.0 299.4 367.4 369.3 349.9 301.4 295.2 208.1 222.8 3212.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 878.3 874.4 872.8 874.3 874.0 870.3 871.5 871.5 872.0 877.4 881.0 879.6 874.8 MAX. QFE PRESSURE IN HPA 885.6 881.4 878.3 880.4 878.6 876.0 877.2 879.8 880.6 886.3 890.9 886.1 890.9 DAY-HOUR 26- 6 13- 6 29- 6 5- 6 7-15 12- 6 4- 3 29- 6 25- 6 2- 6 18- 6 8- 6 MIN. QFE PRESSURE IN HPA 869.3 865.2 866.6 866.7 866.0 862.3 863.4 864.6 865.5 868.6 875.0 873.8 862.3 DAY-HOUR 6-12 5- 3 13- 3 18-12 29-15 19-12 7-15 8-15 21-15 27-12 29-12 25-12 MEAN QNH PRESSURE IN HPA 1020.6 1016.2 1014.3 1016.1 1015.7 1011.5 1012.9 1012.9 1013.4 1019.6 1023.6 1022.0 1016.6 MAX. QNH PRESSURE IN HPA 1028.8 1024.1 1020.6 1022.9 1020.9 1018.0 1019.3 1022.3 1023.2 1029.6 1034.8 1029.4 1034.8 DAY-HOUR 26- 6 13- 6 29- 6 5- 6 7-15 12- 6 4- 3 29- 6 25- 6 2- 6 18- 6 8- 6 MIN. QNH PRESSURE IN HPA 1010.4 1005.8 1007.4 1007.5 1006.7 1002.5 1003.7 1005.1 1006.1 1009.6 1016.8 1015.5 1002.5 DAY-HOUR 6-12 5- 3 13- 3 18-12 29-15 19-12 7-15 8-15 21-15 27-12 29-12 25-12 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 878.3 874.3 873.0 874.9 874.9 871.5 872.4 872.2 872.8 877.9 881.2 879.9 875.3 MAX. QFE PRESSURE IN HPA 884.4 880.4 878.2 879.6 877.8 875.5 877.2 879.5 879.4 885.0 889.8 885.4 889.8 DAY 26 24 29 5 5 12 4 30 25 2 19 8 MIN. QFE PRESSURE IN HPA 872.9 865.2 866.6 867.8 871.0 867.1 866.0 867.0 867.8 870.3 875.6 873.9 865.2 DAY 19 5 13 10 29 19 7 8 20 27 29 25 MEAN QNH PRESSURE IN HPA 1020.6 1016.0 1014.6 1016.7 1016.8 1012.9 1014.0 1013.7 1014.4 1020.1 1023.9 1022.3 1017.2 MAX. QNH PRESSURE IN HPA 1027.5 1022.9 1020.5 1022.0 1020.0 1017.4 1019.3 1021.9 1021.8 1028.1 1033.6 1028.6 1033.6 DAY 26 24 29 5 5 12 4 30 25 2 19 8 MIN. QNH PRESSURE IN HPA 1014.5 1005.8 1007.4 1008.7 1012.3 1007.9 1006.7 1007.8 1008.7 1011.5 1017.5 1015.6 1005.8 DAY 19 5 13 10 29 19 7 8 20 27 29 25 MEAN QFF PRESSURE IN HPA 1023.9 1015.6 1013.7 1011.6 1008.3 1001.6 1002.2 1001.9 1003.8 1014.2 1022.4 1022.1 1011.8 MAX. QFF PRESSURE IN HPA 1031.9 1024.2 1019.1 1022.7 1015.0 1009.0 1007.2 1012.0 1013.2 1022.8 1034.8 1030.5 1034.8 DAY 14 24 29 5 8 28 4 30 25 19 19 4 MIN. QFF PRESSURE IN HPA 1014.8 1001.6 1005.0 1002.3 1001.2 996.1 993.9 995.6 999.1 1003.7 1012.9 1013.7 993.9 DAY 6 11 26 13 30 6 7 8 20 27 3 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 879.3 875.6 873.8 875.7 875.3 871.9 872.9 873.0 873.6 879.0 882.3 880.8 876.1 MAX. QFE PRESSURE IN HPA 885.6 881.4 878.3 880.4 878.4 876.0 877.1 879.8 880.6 886.3 890.9 886.1 890.9 DAY 26 13 29 5 17 12 4 29 25 2 18 8 MIN. QFE PRESSURE IN HPA 873.7 865.4 867.1 869.7 871.0 866.8 865.9 867.3 868.5 871.7 876.4 875.0 865.4 DAY 19 5 13 10 29 19 7 8 20 27 29 25 MEAN QNH PRESSURE IN HPA 1021.7 1017.5 1015.4 1017.6 1017.2 1013.4 1014.5 1014.6 1015.3 1021.3 1025.0 1023.4 1018.1 MAX. QNH PRESSURE IN HPA 1028.8 1024.1 1020.6 1022.9 1020.7 1018.0 1019.2 1022.3 1023.2 1029.6 1034.8 1029.4 1034.8 DAY 26 13 29 5 17 12 4 29 25 2 18 8 MIN. QNH PRESSURE IN HPA 1015.4 1006.0 1007.9 1010.9 1012.3 1007.6 1006.6 1008.1 1009.5 1013.1 1018.4 1016.8 1006.0 DAY 19 5 13 10 29 19 7 8 20 27 29 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 878.4 874.8 873.1 874.6 874.4 870.7 872.0 871.9 872.5 877.7 881.1 879.7 875.1 MAX. QFE PRESSURE IN HPA 884.4 880.6 877.2 879.9 877.7 874.8 876.1 878.4 879.7 883.9 890.1 885.2 890.1 DAY 26 13 29 4 17 12 4 29 25 2 18 8 MIN. QFE PRESSURE IN HPA 872.6 865.5 867.6 868.6 869.0 864.9 864.7 866.3 867.6 870.2 875.6 874.8 864.7 DAY 6 5 13 18 29 19 7 8 20 27 29 25 MEAN QNH PRESSURE IN HPA 1020.7 1016.7 1014.7 1016.4 1016.1 1012.0 1013.4 1013.3 1014.0 1019.9 1023.7 1022.2 1016.9 MAX. QNH PRESSURE IN HPA 1027.5 1023.2 1019.3 1022.4 1019.9 1016.6 1018.1 1020.7 1022.2 1026.9 1033.9 1028.4 1033.9 DAY 26 13 29 4 17 12 4 29 25 2 18 8 MIN. QNH PRESSURE IN HPA 1014.1 1006.1 1008.5 1009.6 1010.1 1005.4 1005.2 1007.0 1008.5 1011.4 1017.5 1016.6 1005.2 DAY 6 5 13 18 29 19 7 8 20 27 29 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 877.5 873.5 871.8 873.2 872.7 868.8 870.4 870.3 870.7 876.2 880.0 878.5 873.6 MAX. QFE PRESSURE IN HPA 883.2 879.2 875.3 878.7 875.6 871.7 874.9 876.8 878.4 882.4 889.0 883.9 889.0 DAY 26 13 29 4 7 27 3 29 25 2 18 3 MIN. QFE PRESSURE IN HPA 869.3 865.5 867.6 866.7 867.0 862.3 863.6 864.8 865.8 868.6 875.0 873.8 862.3 DAY 6 5 13 18 29 19 7 8 20 27 29 25 MEAN QNH PRESSURE IN HPA 1019.7 1015.2 1013.3 1014.8 1014.2 1009.9 1011.7 1011.6 1011.9 1018.2 1022.5 1020.8 1015.3 MAX. QNH PRESSURE IN HPA 1026.1 1021.6 1017.2 1021.0 1017.5 1013.1 1016.7 1018.9 1020.7 1025.2 1032.7 1026.9 1032.7 DAY 26 13 29 4 7 27 3 29 25 2 18 3 MIN. QNH PRESSURE IN HPA 1010.4 1006.1 1008.5 1007.5 1007.8 1002.5 1004.0 1005.3 1006.5 1009.6 1016.8 1015.5 1002.5 DAY 6 5 13 18 29 19 7 8 20 27 29 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 878.0 874.1 872.1 873.2 872.9 868.5 870.0 870.0 870.5 876.5 880.5 879.0 873.8 MAX. QFE PRESSURE IN HPA 883.5 879.1 875.8 878.9 878.6 875.0 874.7 876.2 878.3 882.7 888.8 884.6 888.8 DAY 10 23 28 4 7 27 3 29 25 2 18 4 MIN. QFE PRESSURE IN HPA 869.6 866.8 867.6 867.0 866.0 863.3 863.4 864.6 865.5 869.6 875.4 874.4 863.3 DAY 6 5 13 10 29 19 7 8 21 27 6 24 MEAN QNH PRESSURE IN HPA 1020.3 1015.8 1013.6 1014.9 1014.4 1009.5 1011.1 1011.2 1011.7 1018.5 1023.0 1021.4 1015.5 MAX. QNH PRESSURE IN HPA 1026.4 1021.5 1017.7 1021.3 1020.9 1016.8 1016.5 1018.2 1020.6 1025.5 1032.4 1027.7 1032.4 DAY 10 23 28 4 7 27 3 29 25 2 18 4 MIN. QNH PRESSURE IN HPA 1010.7 1007.6 1008.5 1007.8 1006.7 1003.6 1003.7 1005.1 1006.1 1010.7 1017.3 1016.2 1003.6 DAY 6 5 13 10 29 19 7 8 21 27 6 24 MEAN QFF PRESSURE IN HPA 1023.5 1015.4 1012.5 1009.7 1005.8 998.2 999.4 999.3 1001.1 1012.6 1021.5 1021.1 1010.0 MAX. QFF PRESSURE IN HPA 1032.4 1023.2 1017.4 1021.4 1015.5 1009.3 1003.3 1008.2 1011.5 1021.7 1033.5 1029.3 1033.5 DAY 14 23 15 4 7 27 3 30 25 19 18 3 MIN. QFF PRESSURE IN HPA 1008.9 1003.2 1004.9 1001.6 995.4 991.6 990.7 992.4 995.9 1002.5 1013.4 1012.3 990.7 DAY 6 10 25 12 29 19 7 8 8 27 3 29 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.4 7.4 10.7 19.6 24.8 30.6 35.1 33.9 27.9 23.5 12.5 7.8 20.2 MINIMUN AIR TEMPERATURE (C) 2.6 -0.3 4.4 12.3 17.3 23.5 27.4 25.2 19.9 16.6 7.4 3.0 13.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 6 28 31 31 11 3 0 0 110 DAYS WITH MINIMUM TEMP. <=-4 2 8 1 0 0 0 0 0 0 0 0 0 11 DAYS WITH FREEZING MIN.<= 0 6 15 4 0 0 0 0 0 0 0 0 2 27 TEMPERATURE RECORDS LOWEST(C) -6.4 -8.4 -4.0 1.2 9.4 19.0 22.0 21.0 14.0 11.2 3.8 -2.9 -8.4 DAY 29 7 9 12 6 20 1 29 15 25 28 30 MAXIMUM AIR TEMPERATURE (C) 12.3 12.2 15.2 24.2 29.5 35.2 40.0 38.8 32.6 27.6 16.3 11.3 24.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 13 29 31 31 24 7 0 0 138 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.5 22.2 21.2 31.0 35.2 40.6 43.4 43.2 38.8 34.0 24.6 18.2 43.4 DAY 10 22 23 27 28 16 18 15 2 3 5 10 DIF. BETWEEN (MAX.-MIN.) (C) 9.7 12.5 10.8 11.9 12.2 11.7 12.6 13.6 12.7 11.0 8.9 8.3 11.3 MEAN DAILY TEMP. (MDT) (C) 7.4 6.0 9.8 18.3 23.4 29.3 33.7 32.0 26.3 22.1 11.8 7.2 18.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 12.5 88.9 249.8 393.8 341.2 159.1 57.2 0.0 0.0 1302.7 HEATING DEG. DAYS(BASE 18 0C) 328.1 337.3 253.8 42.2 3.0 0.0 0.0 0.0 0.0 1.1 187.7 335.0 1488.3 DEWPOINT (MEAN C) -6.3 -12.1 -4.9 -3.9 3.3 8.4 7.0 5.8 -0.7 0.2 -0.3 -0.4 -0.3 MIXING RATIO (G/KG) 2.79 1.94 3.29 3.57 5.92 8.48 7.65 7.31 4.33 4.59 4.42 4.30 4.88 VAPOUR PRESSURE (HPA) 3.91 2.73 4.58 4.97 8.23 11.69 10.52 10.07 6.04 6.42 6.20 6.02 6.78 SATURATION DEF. (HPA) 7.52 8.31 8.88 18.88 24.39 33.34 47.51 44.38 32.91 23.59 8.74 4.83 21.94 RELATIVE HUMIDITY (MEAN %) 37 26 39 23 27 28 19 19 17 24 44 59 30 RELATIVE HUMIDITY (MAX. %) 51 38 56 36 39 37 27 26 24 32 58 72 41 RELATIVE HUMIDITY (MIN. %) 28 18 28 14 20 22 14 14 12 19 35 47 23 RELATIVE HUMIDITY (MEAN% 03UTC) 49 36 53 34 38 36 26 25 23 32 57 65 40 RELATIVE HUMIDITY (MEAN% 09UTC) 32 23 35 19 24 25 17 18 15 21 40 56 27 RELATIVE HUMIDITY (MEAN% 15UTC) 37 23 33 20 24 25 15 16 14 22 42 60 28 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 1.5 0.0 33.8 4.4 8.8 0.9 0.0 0.0 0.0 3.5 1.5 18.1 72.5 DAYS WITH PRECIPITATION >=10 0 0 1 0 0 0 0 0 0 0 0 1 2 DAYS WITH PRECIPITATION >= 5 0 0 3 0 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 1 1 0 5 3 4 0 0 0 0 1 1 2 17 DAYS WITH PRECIPITATION 3 0 10 5 9 5 0 0 0 2 2 7 43 GREATEST DAILY PRECIPITATION 1.0 0.0 17.0 2.0 3.0 0.6 0.0 0.0 0.0 3.1 1.0 15.0 17.0 DAY 17 ** 16 4 19 17 ** ** ** 24 3 21 DAY WITH THUNDER STORM 0 0 1 1 2 1 0 0 0 1 0 0 6 DAYS WITH SNOW OR SLEET 0 0 2 0 0 0 0 0 0 0 0 1 3 DAYS WITH DUST 2 3 3 1 2 3 3 0 1 4 0 2 24 WIND DIRECTION (PREVAILING) 180 180 180 180 360 360 45 45 45 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 12.8 11.6 12.5 12.7 8.1 8.8 15.2 15.0 12.7 14.2 12.8 11.1 12.8 PREVAILING WIND PERCENT 19.4 11.4 16.8 17.3 18.7 19.3 29.0 33.5 17.3 18.7 12.7 13.5 14.2 CALMS PERCENT OF WIND 49.7 44.3 43.9 24.7 28.4 26.0 22.6 21.3 35.3 38.1 56.0 54.8 37.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 198 246 219 221 350 21 48 71 51 217 112 145 74 VECTOR WIND MAGNITUDE(KNOTS) 2.4 1.2 2.5 2.7 0.9 2.4 6.9 6.5 1.7 1.5 0.3 0.7 0.7 WIND STEADINESES (MEAN %) 43.6 19.7 39.7 30.0 10.7 27.9 69.7 61.3 23.0 21.7 7.3 17.1 9.6 WIND SPEED (MEAN KNOTS) 5.5 6.1 6.3 9.0 8.4 8.6 9.9 10.6 7.4 6.9 4.1 4.1 7.3 FASTEST WIND DIRECTION 210 230 180 240 270 240 60 60 60 260 180 240 240 FASTEST WIND SPEED (KNOTS) 33 33 31 37 33 31 25 27 23 23 23 29 37 DAY 16 22 29 10 19 24 1 7 16 6 5 9 DAYS WITH SKY CLEAR (0-2)/8 18 23 13 16 15 16 23 31 29 19 9 17 229 DAYS WITH P.CLOUDY (3-6)/8 7 4 11 10 13 13 8 0 1 9 15 10 101 DAYS WITH CLOUDY (7-8)/8 6 1 7 4 3 1 0 0 0 3 6 4 35 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 0 0 0 0 0 0 0 4 5 DURATION OF SUNSHINE HOURS 216.7 262.5 229.1 282.5 316.5 315.1 337.7 368.2 315.9 260.5 178.2 192.5 3275.4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 875.7 875.8 871.8 872.6 874.5 870.5 866.3 870.1 874.6 877.3 879.0 877.1 873.8 MAX. QFE PRESSURE IN HPA 883.5 883.1 885.3 879.9 881.1 875.4 871.6 875.2 880.7 883.0 888.9 885.4 888.9 DAY-HOUR 19- 6 17- 6 11- 6 13- 6 12- 6 11- 6 9- 6 25- 6 15- 6 9- 6 8- 6 28- 6 MIN. QFE PRESSURE IN HPA 865.7 868.7 860.6 864.7 866.3 863.9 860.0 863.0 867.2 872.8 874.0 867.6 860.0 DAY-HOUR 16- 3 22-12 29-12 10-12 4-12 30-15 11-15 5-15 2-15 6-12 19-12 10- 9 MEAN QNH PRESSURE IN HPA 1017.6 1017.8 1013.3 1014.2 1016.3 1011.8 1007.1 1011.3 1016.4 1019.5 1021.3 1019.2 1015.5 MAX. QNH PRESSURE IN HPA 1026.4 1026.0 1028.5 1022.4 1023.7 1017.3 1013.0 1017.1 1023.3 1025.9 1032.5 1028.6 1032.5 DAY-HOUR 19- 6 17- 6 11- 6 13- 6 12- 6 11- 6 9- 6 25- 6 15- 6 9- 6 8- 6 28- 6 MIN. QNH PRESSURE IN HPA 1006.3 1009.7 1000.6 1005.2 1007.0 1004.3 999.9 1003.3 1008.0 1014.4 1015.7 1008.5 999.9 DAY-HOUR 16- 3 22-12 29-12 10-12 4-12 30-15 11-15 5-15 2-15 6-12 19-12 10- 9 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 876.0 875.9 872.4 873.3 875.5 871.6 867.2 870.8 875.5 877.9 879.1 877.1 874.3 MAX. QFE PRESSURE IN HPA 882.1 882.2 883.4 878.6 880.3 875.0 871.0 873.9 879.6 881.7 888.1 884.0 888.1 DAY 24 17 11 13 12 11 8 25 15 9 8 28 MIN. QFE PRESSURE IN HPA 865.7 870.2 865.2 865.5 868.7 867.1 861.8 865.7 870.7 875.2 875.4 868.7 861.8 DAY 16 27 25 10 5 30 16 6 3 23 20 10 MEAN QNH PRESSURE IN HPA 1018.0 1017.9 1013.9 1014.9 1017.4 1013.0 1008.1 1012.1 1017.4 1020.1 1021.5 1019.2 1016.1 MAX. QNH PRESSURE IN HPA 1024.9 1025.0 1026.3 1020.9 1022.8 1016.8 1012.3 1015.6 1022.0 1024.4 1031.6 1027.0 1031.6 DAY 24 17 11 13 12 11 8 25 15 9 8 28 MIN. QNH PRESSURE IN HPA 1006.3 1011.4 1005.8 1006.1 1009.7 1007.9 1001.9 1006.3 1012.0 1017.1 1017.3 1009.7 1001.9 DAY 16 27 25 10 5 30 16 6 3 23 20 10 MEAN QFF PRESSURE IN HPA 1018.2 1018.9 1012.8 1009.5 1009.1 1001.5 994.6 999.5 1007.8 1012.7 1019.4 1019.4 1010.3 MAX. QFF PRESSURE IN HPA 1026.8 1028.4 1027.0 1020.7 1016.3 1005.7 1000.3 1005.0 1015.0 1017.3 1030.2 1029.6 1030.2 DAY 19 7 11 12 12 1 8 29 15 9 8 28 MIN. QFF PRESSURE IN HPA 1003.4 1008.2 1001.0 999.5 1002.2 996.7 987.6 991.7 1000.3 1007.4 1013.3 1007.2 987.6 DAY 16 22 25 10 5 30 16 6 3 6 5 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 876.8 877.3 873.2 874.0 876.0 871.9 868.0 871.6 876.4 878.8 880.2 878.4 875.2 MAX. QFE PRESSURE IN HPA 883.5 883.1 885.3 879.9 881.1 875.4 871.6 875.2 880.7 883.0 888.9 885.4 888.9 DAY 19 17 11 13 12 11 9 25 15 9 8 28 MIN. QFE PRESSURE IN HPA 865.8 870.8 864.1 866.5 870.7 867.4 863.1 866.3 871.7 875.8 876.3 869.2 863.1 DAY 16 27 25 10 5 30 16 5 2 6 19 10 MEAN QNH PRESSURE IN HPA 1018.8 1019.5 1014.8 1015.7 1018.0 1013.4 1008.9 1013.0 1018.5 1021.1 1022.8 1020.6 1017.1 MAX. QNH PRESSURE IN HPA 1026.4 1026.0 1028.5 1022.4 1023.7 1017.3 1013.0 1017.1 1023.3 1025.9 1032.5 1028.6 1032.5 DAY 19 17 11 13 12 11 9 25 15 9 8 28 MIN. QNH PRESSURE IN HPA 1006.5 1012.1 1004.5 1007.2 1012.0 1008.3 1003.4 1007.0 1013.1 1017.7 1018.3 1010.3 1003.4 DAY 16 27 25 10 5 30 16 5 2 6 19 10 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 875.8 876.4 872.1 873.0 874.8 870.9 867.0 870.6 875.1 877.6 879.1 877.2 874.1 MAX. QFE PRESSURE IN HPA 883.0 882.9 883.8 878.4 879.9 874.3 870.2 874.3 879.4 881.9 887.8 884.6 887.8 DAY 19 7 11 14 12 8 19 24 15 8 8 28 MIN. QFE PRESSURE IN HPA 865.7 870.1 861.9 865.0 868.9 866.1 862.6 865.1 869.8 874.0 874.7 867.6 861.9 DAY 16 27 29 10 4 24 16 6 2 23 19 10 MEAN QNH PRESSURE IN HPA 1017.7 1018.4 1013.6 1014.6 1016.6 1012.3 1007.8 1011.9 1017.0 1019.8 1021.5 1019.4 1015.9 MAX. QNH PRESSURE IN HPA 1025.9 1025.8 1026.8 1020.7 1022.4 1016.1 1011.4 1016.1 1021.8 1024.6 1031.3 1027.7 1031.3 DAY 19 7 11 14 12 8 19 24 15 8 8 28 MIN. QNH PRESSURE IN HPA 1006.3 1011.3 1002.0 1005.5 1010.0 1006.8 1002.8 1005.7 1011.0 1015.7 1016.5 1008.5 1002.0 DAY 16 27 29 10 4 24 16 6 2 23 19 10 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 874.7 874.7 870.7 871.5 873.1 869.3 865.1 869.0 873.2 876.1 878.0 876.2 872.6 MAX. QFE PRESSURE IN HPA 881.5 881.7 881.4 877.0 877.7 872.5 868.5 872.9 877.6 880.8 886.4 883.6 886.4 DAY 24 7 11 13 11 13 9 28 19 8 8 28 MIN. QFE PRESSURE IN HPA 866.2 868.7 860.6 864.7 866.3 864.4 860.7 863.0 867.5 872.8 874.0 869.0 860.6 DAY 16 22 29 10 4 30 11 6 2 6 19 10 MEAN QNH PRESSURE IN HPA 1016.5 1016.5 1011.9 1012.9 1014.7 1010.4 1005.7 1010.0 1014.8 1018.1 1020.3 1018.2 1014.2 MAX. QNH PRESSURE IN HPA 1024.2 1024.4 1024.1 1019.1 1019.9 1014.0 1009.5 1014.5 1019.8 1023.4 1029.7 1026.6 1029.7 DAY 24 7 11 13 11 13 9 28 19 8 8 28 MIN. QNH PRESSURE IN HPA 1006.9 1009.7 1000.6 1005.2 1007.0 1004.9 1000.7 1003.3 1008.4 1014.4 1015.7 1010.1 1000.6 DAY 16 22 29 10 4 30 11 6 2 6 19 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 875.2 874.9 870.9 871.6 873.1 868.8 864.4 868.7 873.0 876.3 878.5 876.8 872.7 MAX. QFE PRESSURE IN HPA 881.6 882.4 881.7 877.0 877.9 873.2 867.6 872.6 877.1 881.2 886.8 884.1 886.8 DAY 24 7 11 13 11 14 27 24 19 8 8 28 MIN. QFE PRESSURE IN HPA 866.0 868.7 861.3 864.9 867.1 863.9 860.0 863.0 867.2 873.0 874.5 869.8 860.0 DAY 16 22 29 9 4 30 11 5 2 6 19 10 MEAN QNH PRESSURE IN HPA 1017.0 1016.7 1012.2 1013.0 1014.6 1009.9 1004.9 1009.7 1014.6 1018.4 1020.8 1018.9 1014.2 MAX. QNH PRESSURE IN HPA 1024.3 1025.2 1024.4 1019.1 1020.1 1014.8 1008.5 1014.1 1019.2 1023.9 1030.2 1027.1 1030.2 DAY 24 7 11 13 11 14 27 24 19 8 8 28 MIN. QNH PRESSURE IN HPA 1006.7 1009.7 1001.4 1005.4 1007.9 1004.3 999.9 1003.3 1008.0 1014.6 1016.3 1011.0 999.9 DAY 16 22 29 9 4 30 11 5 2 6 19 10 MEAN QFF PRESSURE IN HPA 1017.2 1017.7 1010.9 1007.5 1006.2 998.3 991.3 997.0 1005.0 1011.0 1018.7 1019.0 1008.3 MAX. QFF PRESSURE IN HPA 1026.2 1030.8 1024.7 1016.9 1014.2 1003.9 995.9 1003.0 1012.2 1016.7 1028.4 1029.6 1030.8 DAY 19 7 11 13 6 14 8 28 15 8 8 28 MIN. QFF PRESSURE IN HPA 1003.5 1004.9 997.2 999.1 999.0 992.7 985.4 987.8 995.8 1004.5 1012.9 1008.6 985.4 DAY 16 22 29 9 4 30 11 6 2 6 5 9 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.3 7.0 13.1 21.1 25.2 31.5 33.3 32.5 28.7 21.4 17.5 11.3 20.6 MINIMUN AIR TEMPERATURE (C) -1.1 1.5 7.1 13.7 17.5 22.6 25.4 24.7 21.1 14.2 10.8 5.2 13.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 6 23 31 29 15 1 0 0 105 DAYS WITH MINIMUM TEMP. <=-4 2 2 1 0 0 0 0 0 0 0 0 0 5 DAYS WITH FREEZING MIN.<= 0 21 11 3 0 0 0 0 0 0 0 0 0 35 TEMPERATURE RECORDS LOWEST(C) -5.4 -4.6 -4.8 6.2 9.2 19.0 21.4 19.4 17.2 7.0 6.8 1.4 -5.4 DAY 10 12 2 7 3 6 25 4 13 12 26 6 MAXIMUM AIR TEMPERATURE (C) 8.1 11.7 17.7 25.9 30.1 36.0 38.0 37.2 33.4 26.0 22.1 15.9 25.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 6 22 30 31 31 27 7 0 0 154 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 14.6 22.6 26.0 32.5 36.8 39.6 42.5 41.4 38.4 34.2 26.0 20.8 42.5 DAY 30 8 29 17 29 28 11 20 3 1 9 14 DIF. BETWEEN (MAX.-MIN.) (C) 9.2 10.2 10.6 12.2 12.6 13.4 12.6 12.5 12.3 11.8 11.3 10.7 11.6 MEAN DAILY TEMP. (MDT) (C) 3.5 6.6 12.4 19.8 23.8 29.3 31.7 30.9 27.2 20.1 16.5 10.6 19.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 31.9 107.3 248.9 330.3 307.9 187.2 40.3 0.0 0.0 1253.9 HEATING DEG. DAYS(BASE 18 0C) 449.1 319.2 180.0 27.3 7.2 0.0 0.0 0.0 0.0 25.8 51.5 230.2 1290.3 DEWPOINT (MEAN C) -3.7 -4.2 -1.0 2.6 3.3 3.2 7.3 5.4 1.2 0.3 -3.9 -4.8 0.5 MIXING RATIO (G/KG) 3.40 3.35 4.31 5.50 5.73 5.68 7.63 6.69 5.07 4.62 3.40 3.22 4.88 VAPOUR PRESSURE (HPA) 4.76 4.68 6.01 7.65 7.97 7.90 10.52 9.28 7.06 6.47 4.77 4.53 6.80 SATURATION DEF. (HPA) 3.74 6.01 10.14 18.71 25.59 39.54 42.23 41.11 33.61 20.52 15.72 9.22 22.18 RELATIVE HUMIDITY (MEAN %) 59 49 42 32 27 18 21 20 19 28 25 35 31 RELATIVE HUMIDITY (MAX. %) 80 69 59 45 40 25 29 30 25 39 31 43 43 RELATIVE HUMIDITY (MIN. %) 45 36 32 24 20 13 16 15 14 21 20 28 24 RELATIVE HUMIDITY (MEAN% 03UTC) 76 64 57 43 38 25 28 29 25 38 29 39 41 RELATIVE HUMIDITY (MEAN% 09UTC) 52 43 38 29 24 16 19 18 16 25 23 33 28 RELATIVE HUMIDITY (MEAN% 15UTC) 55 47 38 27 23 14 17 16 17 25 25 36 28 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 11.5 39.7 35.6 0.8 8.2 0.0 0.0 10.0 0.0 3.6 0.0 0.0 109.4 DAYS WITH PRECIPITATION >=10 0 2 2 0 0 0 0 1 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 1 2 2 0 1 0 0 1 0 0 0 0 7 DAYS WITH PRECIPITATION >= 1 3 2 6 0 1 0 0 1 0 1 0 0 14 DAYS WITH PRECIPITATION 8 7 8 3 7 0 1 3 1 3 0 2 43 GREATEST DAILY PRECIPITATION 6.0 22.0 15.0 0.8 6.5 0.0 0.0 10.0 0.0 2.0 0.0 0.0 22.0 DAY 5 12 10 6 14 ** ** 4 ** 12 ** ** DAY WITH THUNDER STORM 0 0 0 1 0 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 3 2 2 0 0 0 0 0 0 0 0 0 7 DAYS WITH DUST 0 3 4 3 1 3 10 1 1 1 0 0 27 WIND DIRECTION (PREVAILING) 180 45 180 180 45 45 45 45 45 45 180 180 45 PREVAILING WIND SPEED(KNOTS) 10.1 9.4 14.4 13.7 11.4 15.3 15.0 13.9 11.1 9.9 13.5 9.7 12.6 PREVAILING WIND PERCENT 11.6 12.9 18.1 16.7 23.2 46.7 39.4 28.4 20.7 12.9 20.0 16.8 19.1 CALMS PERCENT OF WIND 63.2 52.1 41.3 32.7 19.4 20.0 14.2 24.5 28.7 46.5 54.7 61.3 38.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 235 198 178 233 31 50 48 47 42 46 171 202 56 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.1 1.0 1.6 1.0 7.0 6.3 5.3 2.7 0.7 1.7 0.8 1.5 WIND STEADINESES (MEAN %) 22.9 20.4 13.9 20.0 10.5 64.2 57.3 58.2 35.1 13.5 35.4 26.7 21.1 WIND SPEED (MEAN KNOTS) 3.5 5.4 7.2 8.0 9.5 10.9 11.0 9.1 7.7 5.2 4.8 3.0 7.1 FASTEST WIND DIRECTION 160 60 300 210 210 60 60 60 30 60 170 170 60 FASTEST WIND SPEED (KNOTS) 23 39 29 29 35 39 25 23 23 23 23 23 39 DAY 14 9 15 20 29 13 1 1 3 9 28 20 DAYS WITH SKY CLEAR (0-2)/8 14 12 10 15 19 28 19 22 25 28 17 13 222 DAYS WITH P.CLOUDY (3-6)/8 12 11 13 11 9 2 12 9 5 2 10 13 109 DAYS WITH CLOUDY (7-8)/8 5 5 8 4 3 0 0 0 0 1 3 5 34 DAYS WITH VISIBILITY =< 2 KM 5 3 1 0 0 0 0 0 0 1 0 0 10 DURATION OF SUNSHINE HOURS 220.8 195.9 228.9 277.4 333.6 377.5 349.9 352.6 293.8 289.1 238.9 197.5 3355.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 875.1 875.6 873.9 874.0 874.2 872.5 868.8 872.1 873.5 878.1 879.1 880.2 874.8 MAX. QFE PRESSURE IN HPA 883.4 888.5 881.2 884.6 881.7 878.6 878.6 877.6 878.9 886.2 886.0 887.0 888.5 DAY-HOUR 4- 6 23- 6 28- 6 12- 6 8- 6 17- 6 20- 6 25- 6 13- 6 10- 6 21- 6 9- 6 MIN. QFE PRESSURE IN HPA 863.0 864.8 863.1 865.3 864.0 866.3 860.0 866.7 866.6 869.9 873.4 872.6 860.0 DAY-HOUR 13- 3 15- 9 18-15 23-15 29-15 29-15 8-15 21-15 4-15 1-12 1-12 21- 3 MEAN QNH PRESSURE IN HPA 1017.0 1017.5 1015.6 1015.7 1015.9 1014.0 1009.8 1013.6 1015.1 1020.3 1021.4 1022.8 1016.6 MAX. QNH PRESSURE IN HPA 1026.3 1032.1 1023.9 1027.7 1024.4 1020.9 1020.9 1019.8 1021.3 1029.5 1029.3 1030.4 1032.1 DAY-HOUR 4- 6 23- 6 28- 6 12- 6 8- 6 17- 6 20- 6 25- 6 13- 6 10- 6 21- 6 9- 6 MIN. QNH PRESSURE IN HPA 1003.3 1005.3 1003.4 1005.9 1004.4 1007.0 999.9 1007.5 1007.4 1011.1 1015.0 1014.1 999.9 DAY-HOUR 13- 3 15- 9 18-15 23-15 29-15 29-15 8-15 21-15 4-15 1-12 1-12 21- 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 875.0 875.7 874.3 874.7 875.1 873.5 869.7 872.9 874.2 878.5 879.4 880.4 875.3 MAX. QFE PRESSURE IN HPA 881.8 887.1 880.3 883.9 880.3 878.5 878.1 876.7 878.1 885.5 884.8 885.8 887.1 DAY 4 23 28 12 8 17 20 25 13 10 21 10 MIN. QFE PRESSURE IN HPA 863.0 865.7 865.4 867.3 868.7 869.3 863.1 869.2 868.8 871.6 874.4 872.6 863.0 DAY 13 14 30 24 30 29 5 22 5 1 11 21 MEAN QNH PRESSURE IN HPA 1016.9 1017.7 1016.1 1016.5 1016.9 1015.2 1010.9 1014.5 1015.9 1020.7 1021.8 1022.9 1017.2 MAX. QNH PRESSURE IN HPA 1024.5 1030.5 1022.8 1026.9 1022.8 1020.8 1020.3 1018.8 1020.3 1028.7 1027.9 1029.0 1030.5 DAY 4 23 28 12 8 17 20 25 13 10 21 10 MIN. QNH PRESSURE IN HPA 1003.3 1006.3 1006.0 1008.1 1009.7 1010.4 1003.4 1010.3 1009.8 1013.0 1016.2 1014.1 1003.3 DAY 13 14 30 24 30 29 5 22 5 1 11 21 MEAN QFF PRESSURE IN HPA 1019.1 1018.5 1014.3 1010.1 1008.3 1003.7 998.3 1002.4 1005.9 1014.5 1017.8 1022.0 1011.2 MAX. QFF PRESSURE IN HPA 1027.1 1034.0 1021.4 1022.2 1019.4 1009.9 1008.6 1007.6 1012.3 1025.1 1023.6 1027.8 1034.0 DAY 4 23 4 7 3 17 20 8 13 10 21 10 MIN. QFF PRESSURE IN HPA 1005.3 1001.2 999.0 1000.8 999.2 997.5 989.2 997.4 997.9 1003.7 1010.2 1012.2 989.2 DAY 13 8 30 24 30 29 5 17 5 1 11 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 876.1 876.8 875.3 875.5 875.7 874.0 870.3 873.6 875.0 879.5 880.4 881.4 876.1 MAX. QFE PRESSURE IN HPA 883.4 888.5 881.2 884.6 881.7 878.6 878.6 877.6 878.9 886.2 886.0 887.0 888.5 DAY 4 23 28 12 8 17 20 25 13 10 21 9 MIN. QFE PRESSURE IN HPA 863.5 866.3 866.2 867.8 868.4 869.5 863.9 870.1 869.4 872.5 875.8 873.8 863.5 DAY 13 15 15 24 30 29 8 22 5 1 11 21 MEAN QNH PRESSURE IN HPA 1018.1 1018.8 1017.2 1017.4 1017.6 1015.7 1011.5 1015.2 1016.9 1022.0 1022.9 1024.0 1018.1 MAX. QNH PRESSURE IN HPA 1026.3 1032.1 1023.9 1027.7 1024.4 1020.9 1020.9 1019.8 1021.3 1029.5 1029.3 1030.4 1032.1 DAY 4 23 28 12 8 17 20 25 13 10 21 9 MIN. QNH PRESSURE IN HPA 1003.9 1007.0 1006.9 1008.7 1009.4 1010.6 1004.3 1011.3 1010.5 1014.0 1017.7 1015.5 1003.9 DAY 13 15 15 24 30 29 8 22 5 1 11 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 875.3 875.9 874.4 874.6 874.7 872.9 869.3 872.6 873.9 878.5 879.2 880.3 875.1 MAX. QFE PRESSURE IN HPA 882.7 887.2 880.3 883.9 880.8 877.0 877.1 876.3 878.0 884.3 884.8 886.5 887.2 DAY 4 23 26 12 8 6 20 25 12 10 21 29 MIN. QFE PRESSURE IN HPA 863.3 864.8 865.2 867.2 866.9 868.1 863.1 868.7 868.8 871.5 875.0 873.3 863.1 DAY 13 15 18 24 30 29 8 22 5 1 1 21 MEAN QNH PRESSURE IN HPA 1017.1 1017.9 1016.2 1016.3 1016.5 1014.5 1010.4 1014.1 1015.6 1020.7 1021.6 1022.8 1017.0 MAX. QNH PRESSURE IN HPA 1025.5 1030.6 1022.8 1026.9 1023.4 1019.1 1019.2 1018.3 1020.2 1027.3 1027.9 1029.8 1030.6 DAY 4 23 26 12 8 6 20 25 12 10 21 29 MIN. QNH PRESSURE IN HPA 1003.6 1005.3 1005.8 1008.0 1007.7 1009.0 1003.4 1009.7 1009.8 1012.9 1016.8 1014.9 1003.4 DAY 13 15 18 24 30 29 8 22 5 1 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 874.3 874.5 872.8 872.8 873.1 871.3 867.5 871.0 872.2 876.9 878.0 879.3 873.6 MAX. QFE PRESSURE IN HPA 881.9 885.7 878.8 882.3 879.4 875.4 875.0 874.1 876.5 882.5 883.7 885.8 885.8 DAY 4 23 26 12 8 6 20 25 12 10 21 29 MIN. QFE PRESSURE IN HPA 864.0 864.9 864.7 865.6 864.9 867.0 861.0 867.0 867.5 869.9 873.4 872.6 861.0 DAY 13 15 18 21 29 29 8 22 3 1 1 31 MEAN QNH PRESSURE IN HPA 1016.1 1016.3 1014.3 1014.4 1014.7 1012.7 1008.4 1012.3 1013.6 1019.0 1020.3 1021.8 1015.3 MAX. QNH PRESSURE IN HPA 1024.6 1028.9 1021.1 1025.1 1021.8 1017.3 1016.8 1015.8 1018.5 1025.3 1026.7 1029.0 1029.0 DAY 4 23 26 12 8 6 20 25 12 10 21 29 MIN. QNH PRESSURE IN HPA 1004.4 1005.4 1005.2 1006.2 1005.4 1007.8 1001.0 1007.8 1008.4 1011.1 1015.0 1014.1 1001.0 DAY 13 15 18 21 29 29 8 22 3 1 1 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 874.8 874.9 872.9 872.6 872.6 870.9 867.1 870.6 872.1 877.1 878.4 880.0 873.7 MAX. QFE PRESSURE IN HPA 882.1 885.5 878.4 881.7 879.0 874.9 874.6 873.6 876.4 883.3 884.3 886.3 886.3 DAY 4 23 26 12 8 6 20 29 12 9 21 29 MIN. QFE PRESSURE IN HPA 866.2 866.0 863.1 865.3 864.0 866.3 860.0 866.7 866.6 870.1 873.7 873.7 860.0 DAY 12 13 18 23 29 29 8 21 4 1 1 31 MEAN QNH PRESSURE IN HPA 1016.6 1016.7 1014.4 1014.1 1014.1 1012.2 1008.0 1011.9 1013.6 1019.2 1020.7 1022.5 1015.3 MAX. QNH PRESSURE IN HPA 1024.9 1028.7 1020.7 1024.4 1021.4 1016.7 1016.4 1015.3 1018.4 1026.2 1027.3 1029.6 1029.6 DAY 4 23 26 12 8 6 20 29 12 9 21 29 MIN. QNH PRESSURE IN HPA 1006.9 1006.7 1003.4 1005.9 1004.4 1007.0 999.9 1007.5 1007.4 1011.3 1015.4 1015.4 999.9 DAY 12 13 18 23 29 29 8 21 4 1 1 31 MEAN QFF PRESSURE IN HPA 1018.8 1017.4 1012.3 1007.5 1005.4 1000.7 995.2 999.9 1003.5 1013.0 1016.6 1021.5 1009.3 MAX. QFF PRESSURE IN HPA 1027.4 1031.0 1020.4 1017.7 1016.7 1005.6 1005.6 1004.5 1010.2 1023.0 1023.4 1029.1 1031.0 DAY 4 23 4 7 2 17 20 8 12 10 21 29 MIN. QFF PRESSURE IN HPA 1009.7 1002.7 1004.3 999.0 993.5 994.2 985.9 994.5 995.7 1001.2 1010.0 1014.2 985.9 DAY 12 8 30 21 29 29 8 20 3 1 1 21 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.6 11.8 12.7 20.1 27.3 32.6 31.6 32.8 28.4 23.3 12.5 8.4 20.6 MINIMUN AIR TEMPERATURE (C) 1.4 5.7 7.1 13.0 18.7 23.5 23.9 24.3 20.6 16.1 6.8 2.7 13.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 8 26 26 31 19 0 0 0 110 DAYS WITH MINIMUM TEMP. <=-4 3 0 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH FREEZING MIN.<= 0 7 0 0 0 0 0 0 0 0 0 1 4 12 TEMPERATURE RECORDS LOWEST(C) -5.0 0.2 1.0 7.8 13.6 20.2 18.2 21.6 15.0 8.4 -2.6 -2.4 -5.0 DAY 3 22 19 11 22 17 28 21 28 27 30 1 MAXIMUM AIR TEMPERATURE (C) 9.3 16.7 16.8 24.9 32.2 37.4 36.3 37.3 33.3 27.6 16.6 12.6 25.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 22 30 31 31 24 8 0 0 146 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 12.8 21.4 25.0 29.0 38.4 41.2 42.6 39.4 37.6 32.8 24.0 17.6 42.6 DAY 11 20 31 8 31 28 4 30 11 11 26 29 DIF. BETWEEN (MAX.-MIN.) (C) 7.9 11.0 9.7 11.9 13.5 13.9 12.4 13.0 12.7 11.5 9.8 9.9 11.5 MEAN DAILY TEMP. (MDT) (C) 5.3 11.2 11.9 18.9 25.5 30.5 30.1 30.8 26.9 21.9 11.7 7.6 19.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 5.5 140.4 283.6 283.1 303.6 178.9 52.7 0.0 0.0 1248.1 HEATING DEG. DAYS(BASE 18 0C) 392.6 190.5 187.8 16.9 0.0 0.0 0.0 0.0 0.0 9.6 191.4 320.9 1309.7 DEWPOINT (MEAN C) -2.7 -4.3 -2.4 -1.0 -0.7 -1.2 5.1 0.6 1.0 -1.3 -1.5 -5.0 -1.1 MIXING RATIO (G/KG) 3.75 3.33 3.86 4.44 4.32 4.17 6.72 4.69 4.88 4.05 4.09 3.17 4.29 VAPOUR PRESSURE (HPA) 5.26 4.65 5.38 6.19 6.01 5.79 9.27 6.52 6.79 5.67 5.73 4.46 5.98 SATURATION DEF. (HPA) 4.06 9.70 10.09 18.04 31.63 44.87 38.81 44.40 33.48 24.01 9.40 6.84 22.94 RELATIVE HUMIDITY (MEAN %) 59 35 41 28 17 13 21 14 19 21 42 42 29 RELATIVE HUMIDITY (MAX. %) 71 49 57 42 26 18 30 19 25 29 55 52 39 RELATIVE HUMIDITY (MIN. %) 49 26 30 19 12 9 15 10 14 16 34 33 22 RELATIVE HUMIDITY (MEAN% 03UTC) 68 47 54 41 26 18 30 18 24 28 53 49 38 RELATIVE HUMIDITY (MEAN% 09UTC) 55 31 36 25 15 11 19 12 17 18 39 38 26 RELATIVE HUMIDITY (MEAN% 15UTC) 57 30 38 22 14 10 17 12 16 20 42 43 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 41.0 0.8 67.4 6.2 0.0 0.0 2.6 0.0 0.2 0.0 9.5 2.2 129.9 DAYS WITH PRECIPITATION >=10 2 0 2 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 3 0 4 0 0 0 0 0 0 0 1 0 8 DAYS WITH PRECIPITATION >= 1 10 0 5 4 0 0 1 0 0 0 2 1 23 DAYS WITH PRECIPITATION 11 2 8 7 0 0 2 0 1 0 5 3 39 GREATEST DAILY PRECIPITATION 12.0 0.4 31.0 2.0 0.0 0.0 2.0 0.0 0.2 0.0 7.0 2.0 31.0 DAY 25 6 2 22 ** ** 14 ** 28 ** 9 12 DAY WITH THUNDER STORM 0 0 0 1 0 0 0 0 0 0 1 0 2 DAYS WITH SNOW OR SLEET 3 1 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH DUST 1 1 4 2 5 6 2 1 4 3 3 3 35 WIND DIRECTION (PREVAILING) 180 180 180 180 315 45 45 45 360 360 180 180 45 PREVAILING WIND SPEED(KNOTS) 10.8 13.2 12.4 13.9 11.1 13.4 13.9 14.2 7.7 8.1 13.0 9.3 12.3 PREVAILING WIND PERCENT 12.3 21.4 12.9 14.7 23.2 24.0 46.5 51.6 28.7 22.6 16.7 19.4 19.8 CALMS PERCENT OF WIND 68.4 42.1 53.5 29.3 10.3 14.7 11.0 7.7 9.3 18.1 36.0 49.7 29.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 163 206 213 266 358 15 37 61 13 50 153 160 36 VECTOR WIND MAGNITUDE(KNOTS) 0.8 2.5 1.0 0.9 3.5 3.1 6.9 7.6 3.7 0.6 0.2 0.8 1.5 WIND STEADINESES (MEAN %) 28.6 39.1 19.6 11.0 32.7 29.2 62.2 63.9 38.1 7.3 3.3 22.9 19.2 WIND SPEED (MEAN KNOTS) 2.8 6.4 5.1 8.2 10.7 10.6 11.1 11.9 9.7 8.2 6.1 3.5 7.8 FASTEST WIND DIRECTION 180 180 180 190 200 220 60 40 140 210 190 180 180 FASTEST WIND SPEED (KNOTS) 33 25 33 31 27 29 29 23 27 29 29 17 33 DAY 31 19 26 8 20 13 13 1 11 31 1 31 DAYS WITH SKY CLEAR (0-2)/8 10 16 12 14 28 29 27 29 29 25 12 15 246 DAYS WITH P.CLOUDY (3-6)/8 9 10 11 15 3 1 4 2 1 5 14 13 88 DAYS WITH CLOUDY (7-8)/8 12 2 8 1 0 0 0 0 0 1 4 3 31 DAYS WITH VISIBILITY =< 2 KM 3 1 3 0 0 0 0 0 0 0 2 4 13 DURATION OF SUNSHINE HOURS 162.0 229.0 219.9 276.5 367.3 375.8 364.4 367.9 323.8 281.9 217.2 215.0 3400.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 877.5 874.9 873.7 874.1 872.7 869.5 868.5 871.3 872.4 876.8 877.9 881.2 874.2 MAX. QFE PRESSURE IN HPA 889.1 882.5 880.6 879.8 880.3 876.1 874.7 878.9 879.6 881.4 885.2 888.2 889.1 DAY-HOUR 2- 6 12- 6 19- 6 11- 6 28- 6 1- 6 19- 6 20- 6 30- 6 27- 6 30- 6 6- 6 MIN. QFE PRESSURE IN HPA 868.0 865.0 866.9 864.3 861.5 860.0 863.0 865.5 865.7 871.8 869.6 872.7 860.0 DAY-HOUR 9-12 20-15 21-12 8-12 20-15 24-15 22-15 14-15 11-15 31-12 26-12 15-15 MEAN QNH PRESSURE IN HPA 1019.6 1016.7 1015.4 1015.8 1014.3 1010.7 1009.4 1012.7 1013.9 1018.9 1020.1 1023.8 1016.0 MAX. QNH PRESSURE IN HPA 1032.8 1025.3 1023.2 1022.3 1022.8 1018.1 1016.5 1021.3 1022.0 1024.1 1028.4 1031.8 1032.8 DAY-HOUR 2- 6 12- 6 19- 6 11- 6 28- 6 1- 6 19- 6 20- 6 30- 6 27- 6 30- 6 6- 6 MIN. QNH PRESSURE IN HPA 1008.9 1005.5 1007.7 1004.8 1001.6 999.9 1003.3 1006.1 1006.3 1013.2 1010.7 1014.2 999.9 DAY-HOUR 9-12 20-15 21-12 8-12 20-15 24-15 22-15 14-15 11-15 31-12 26-12 15-15 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 877.5 875.1 874.0 874.9 873.8 870.7 869.4 871.9 873.0 877.3 878.1 881.2 874.7 MAX. QFE PRESSURE IN HPA 886.8 881.0 880.4 878.4 879.4 875.2 874.0 878.4 878.1 881.2 883.3 887.0 887.0 DAY 2 12 19 11 28 17 19 20 29 27 30 6 MIN. QFE PRESSURE IN HPA 870.3 865.8 869.4 868.8 867.5 861.6 864.9 868.2 867.6 872.9 871.2 874.0 861.6 DAY 9 21 22 8 20 25 23 14 16 31 26 16 MEAN QNH PRESSURE IN HPA 1019.7 1017.0 1015.7 1016.7 1015.5 1012.0 1010.5 1013.4 1014.6 1019.4 1020.3 1023.9 1016.6 MAX. QNH PRESSURE IN HPA 1030.2 1023.6 1022.9 1020.7 1021.8 1017.1 1015.7 1020.7 1020.3 1023.9 1026.2 1030.4 1030.4 DAY 2 12 19 11 28 17 19 20 29 27 30 6 MIN. QNH PRESSURE IN HPA 1011.5 1006.5 1010.5 1009.8 1008.4 1001.7 1005.4 1009.2 1008.5 1014.5 1012.6 1015.7 1001.7 DAY 9 21 22 8 20 25 23 14 16 31 26 16 MEAN QFF PRESSURE IN HPA 1021.2 1015.3 1013.6 1010.8 1006.2 1000.1 998.7 1001.6 1004.8 1012.4 1018.5 1024.8 1010.7 MAX. QFF PRESSURE IN HPA 1034.3 1022.8 1023.9 1018.0 1011.7 1006.8 1005.3 1009.8 1013.7 1020.9 1029.5 1032.9 1034.3 DAY 3 12 19 11 2 17 28 20 29 27 30 6 MIN. QFF PRESSURE IN HPA 1011.5 1001.9 1004.8 1003.1 996.6 989.0 991.9 997.6 997.4 1007.9 1006.6 1015.1 989.0 DAY 9 21 22 14 20 25 23 14 16 31 1 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 878.5 876.3 875.0 875.7 874.4 871.2 870.0 872.7 874.0 878.4 879.0 882.2 875.6 MAX. QFE PRESSURE IN HPA 889.1 882.5 880.6 879.8 880.3 876.1 874.7 878.9 879.6 881.4 885.2 888.2 889.1 DAY 2 12 19 11 28 1 19 20 30 27 30 6 MIN. QFE PRESSURE IN HPA 870.9 868.6 870.6 868.6 867.4 862.4 865.8 868.9 868.9 874.0 871.3 875.9 862.4 DAY 9 20 2 8 14 25 23 14 16 31 26 14 MEAN QNH PRESSURE IN HPA 1020.8 1018.3 1016.9 1017.6 1016.1 1012.5 1011.2 1014.3 1015.8 1020.6 1021.3 1025.0 1017.5 MAX. QNH PRESSURE IN HPA 1032.8 1025.3 1023.2 1022.3 1022.8 1018.1 1016.5 1021.3 1022.0 1024.1 1028.4 1031.8 1032.8 DAY 2 12 19 11 28 1 19 20 30 27 30 6 MIN. QNH PRESSURE IN HPA 1012.2 1009.6 1011.9 1009.6 1008.3 1002.6 1006.5 1010.0 1010.0 1015.7 1012.7 1017.9 1002.6 DAY 9 20 2 8 14 25 23 14 16 31 26 14 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 877.7 875.3 874.1 874.7 873.2 870.1 869.0 871.8 872.9 877.1 877.9 881.3 874.6 MAX. QFE PRESSURE IN HPA 888.7 881.4 879.7 878.9 879.2 875.0 873.4 877.6 878.7 880.1 884.0 887.1 888.7 DAY 2 12 19 11 28 1 19 20 30 27 30 6 MIN. QFE PRESSURE IN HPA 868.4 866.5 869.2 866.4 865.5 861.5 865.0 868.0 867.9 873.4 869.7 874.1 861.5 DAY 9 20 21 8 20 25 14 14 16 31 26 15 MEAN QNH PRESSURE IN HPA 1019.9 1017.2 1015.9 1016.5 1014.8 1011.3 1010.0 1013.3 1014.5 1019.2 1020.1 1023.9 1016.4 MAX. QNH PRESSURE IN HPA 1032.3 1024.1 1022.2 1021.3 1021.6 1016.8 1015.0 1019.8 1021.0 1022.6 1027.0 1030.5 1032.3 DAY 2 12 19 11 28 1 19 20 30 27 30 6 MIN. QNH PRESSURE IN HPA 1009.4 1007.2 1010.3 1007.1 1006.1 1001.6 1005.5 1008.9 1008.8 1015.0 1010.9 1015.8 1001.6 DAY 9 20 21 8 20 25 14 14 16 31 26 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 876.6 873.7 872.6 872.8 871.3 868.2 867.2 870.2 871.1 875.6 876.9 880.3 873.0 MAX. QFE PRESSURE IN HPA 887.3 880.1 878.0 877.1 877.1 872.6 871.0 875.5 877.5 879.2 883.6 885.5 887.3 DAY 2 12 30 11 28 1 28 20 30 27 30 6 MIN. QFE PRESSURE IN HPA 868.0 866.0 866.9 864.3 863.1 860.7 863.4 866.0 866.5 871.8 869.6 873.0 860.7 DAY 9 20 21 8 20 25 23 14 15 31 26 15 MEAN QNH PRESSURE IN HPA 1018.6 1015.4 1014.1 1014.3 1012.7 1009.1 1008.0 1011.5 1012.5 1017.6 1019.0 1022.9 1014.6 MAX. QNH PRESSURE IN HPA 1030.7 1022.6 1020.2 1019.2 1019.2 1014.1 1012.3 1017.4 1019.7 1021.6 1026.6 1028.7 1030.7 DAY 2 12 30 11 28 1 28 20 30 27 30 6 MIN. QNH PRESSURE IN HPA 1008.9 1006.7 1007.7 1004.8 1003.4 1000.7 1003.7 1006.7 1007.2 1013.2 1010.7 1014.6 1000.7 DAY 9 20 21 8 20 25 23 14 15 31 26 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 877.1 874.1 872.9 872.7 871.0 867.6 866.8 870.0 871.2 875.9 877.6 880.9 873.1 MAX. QFE PRESSURE IN HPA 887.6 880.2 878.0 877.3 876.2 871.9 870.7 874.8 877.8 879.4 884.1 885.9 887.6 DAY 2 12 30 11 28 1 28 19 30 26 30 5 MIN. QFE PRESSURE IN HPA 868.5 865.0 867.4 864.8 861.5 860.0 863.0 865.5 865.7 872.7 871.4 872.7 860.0 DAY 9 20 21 8 20 24 22 14 11 31 25 15 MEAN QNH PRESSURE IN HPA 1019.2 1015.9 1014.5 1014.2 1012.3 1008.5 1007.5 1011.2 1012.5 1017.9 1019.7 1023.5 1014.7 MAX. QNH PRESSURE IN HPA 1031.1 1022.7 1020.2 1019.4 1018.2 1013.3 1012.0 1016.6 1020.0 1021.8 1027.1 1029.2 1031.1 DAY 2 12 30 11 28 1 28 19 30 26 30 5 MIN. QNH PRESSURE IN HPA 1009.5 1005.5 1008.3 1005.3 1001.6 999.9 1003.3 1006.1 1006.3 1014.2 1012.8 1014.2 999.9 DAY 9 20 21 8 20 24 22 14 11 31 25 15 MEAN QFF PRESSURE IN HPA 1020.7 1014.1 1012.3 1008.3 1002.8 996.6 995.7 999.3 1002.6 1010.9 1018.0 1024.2 1008.8 MAX. QFF PRESSURE IN HPA 1034.8 1021.9 1020.5 1016.1 1008.3 1001.8 1002.3 1005.5 1012.2 1019.0 1030.6 1031.3 1034.8 DAY 2 12 19 11 22 16 28 20 30 27 30 5 MIN. QFF PRESSURE IN HPA 1009.8 1000.2 1002.6 999.1 989.6 987.5 989.5 994.3 994.1 1006.3 1007.1 1013.6 987.5 DAY 9 20 21 8 20 24 23 14 11 12 1 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.3 8.1 13.7 23.7 28.9 31.4 32.5 32.4 29.1 19.8 10.9 7.1 20.3 MINIMUN AIR TEMPERATURE (C) 0.3 1.3 6.2 15.6 19.9 22.5 23.8 23.8 21.6 13.4 6.1 2.7 13.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 7 23 28 30 18 0 0 0 107 DAYS WITH MINIMUM TEMP. <=-4 4 2 0 0 0 0 0 0 0 0 0 0 6 DAYS WITH FREEZING MIN.<= 0 17 8 1 0 0 0 0 0 0 0 0 1 27 TEMPERATURE RECORDS LOWEST(C) -6.2 -6.6 -1.8 9.2 15.4 14.4 19.8 20.0 16.2 8.0 2.6 0.0 -6.6 DAY 18 8 4 1 13 14 27 20 26 5 19 31 MAXIMUM AIR TEMPERATURE (C) 11.0 12.6 18.5 28.6 33.7 36.2 37.2 37.2 33.9 24.2 14.2 10.5 24.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 11 30 28 31 31 29 2 0 0 162 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.4 19.0 27.0 33.6 39.0 42.6 41.6 41.0 38.4 30.4 22.6 14.8 42.6 DAY 6 24 24 15 26 24 11 31 8 25 3 22 DIF. BETWEEN (MAX.-MIN.) (C) 10.7 11.3 12.3 13.0 13.8 13.7 13.4 13.4 12.3 10.8 8.1 7.8 11.7 MEAN DAILY TEMP. (MDT) (C) 5.6 7.0 12.4 22.1 26.8 29.4 30.5 30.5 27.8 18.8 10.2 6.6 19.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.7 54.2 178.9 250.6 294.6 294.9 202.8 13.5 0.0 0.0 1290.4 HEATING DEG. DAYS(BASE 18 0C) 382.8 320.0 180.5 2.5 0.0 0.0 0.0 0.0 0.0 28.8 234.7 354.8 1504.1 DEWPOINT (MEAN C) -8.4 -6.8 -7.2 -2.0 -2.4 0.4 0.1 0.2 0.9 0.6 0.6 0.7 -1.9 MIXING RATIO (G/KG) 2.46 2.78 2.71 3.99 3.82 4.67 4.64 4.64 4.82 4.86 4.72 4.71 4.07 VAPOUR PRESSURE (HPA) 3.45 3.89 3.79 5.57 5.32 6.47 6.44 6.45 6.71 6.80 6.62 6.60 5.67 SATURATION DEF. (HPA) 6.57 7.46 12.71 24.65 35.58 41.60 43.99 43.56 34.86 17.14 6.78 3.64 23.21 RELATIVE HUMIDITY (MEAN %) 37 38 25 19 14 15 14 14 17 33 53 66 29 RELATIVE HUMIDITY (MAX. %) 46 56 35 28 20 22 20 20 24 44 68 80 39 RELATIVE HUMIDITY (MIN. %) 30 27 18 14 9 10 9 10 13 24 42 55 22 RELATIVE HUMIDITY (MEAN% 03UTC) 43 53 35 26 20 22 19 20 23 41 66 75 37 RELATIVE HUMIDITY (MEAN% 09UTC) 35 35 22 18 12 14 12 12 16 29 49 60 26 RELATIVE HUMIDITY (MEAN% 15UTC) 36 33 21 18 11 11 10 11 15 33 52 74 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 8.0 14.8 0.2 0.0 0.0 0.0 0.0 0.0 0.0 13.9 51.2 41.1 129.2 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 1 1 2 5 DAYS WITH PRECIPITATION >= 5 0 1 0 0 0 0 0 0 0 1 2 3 7 DAYS WITH PRECIPITATION >= 1 2 2 0 0 0 0 0 0 0 2 7 6 19 DAYS WITH PRECIPITATION 4 4 1 1 0 0 0 0 0 5 8 12 35 GREATEST DAILY PRECIPITATION 4.0 11.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 11.5 31.0 15.0 31.0 DAY 30 8 28 ** ** ** ** ** ** 4 6 10 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 1 1 0 2 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 2 1 6 8 5 4 1 0 3 0 2 0 32 WIND DIRECTION (PREVAILING) 180 180 180 360 315 45 45 45 45 180 180 180 45 PREVAILING WIND SPEED(KNOTS) 11.6 9.6 14.9 8.3 9.4 13.8 13.6 12.6 12.4 13.4 10.5 9.5 11.8 PREVAILING WIND PERCENT 21.9 18.6 25.8 26.0 21.9 38.0 54.8 43.2 28.7 17.4 14.7 10.3 22.0 CALMS PERCENT OF WIND 38.1 48.3 21.3 16.0 21.3 16.7 15.5 15.5 24.0 38.7 54.0 62.6 30.9 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 195 122 188 315 322 41 54 51 47 27 103 229 46 VECTOR WIND MAGNITUDE(KNOTS) 1.2 0.3 1.4 1.3 2.0 5.3 8.1 5.6 3.3 0.2 0.6 0.2 1.7 WIND STEADINESES (MEAN %) 21.1 6.8 14.7 14.3 24.4 54.1 76.4 56.0 39.3 3.0 15.4 6.5 23.0 WIND SPEED (MEAN KNOTS) 5.7 4.4 9.5 9.1 8.2 9.8 10.6 10.0 8.4 6.6 3.9 3.1 7.4 FASTEST WIND DIRECTION 180 210 210 240 240 60 60 60 60 180 170 310 210 FASTEST WIND SPEED (KNOTS) 23 23 35 29 27 27 35 29 31 29 16 16 35 DAY 6 27 25 10 1 21 10 29 10 28 4 16 DAYS WITH SKY CLEAR (0-2)/8 17 19 22 18 25 28 29 27 23 22 15 14 259 DAYS WITH P.CLOUDY (3-6)/8 8 7 6 12 6 2 2 4 7 8 7 9 78 DAYS WITH CLOUDY (7-8)/8 6 3 3 0 0 0 0 0 0 1 8 8 29 DAYS WITH VISIBILITY =< 2 KM 2 0 0 0 1 2 0 1 0 2 3 7 18 DURATION OF SUNSHINE HOURS 210.4 241.4 263.2 282.6 354.4 367.6 368.1 350.3 279.9 264.9 187.1 167.7 3337.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 875.4 875.7 874.0 873.9 871.3 869.3 870.4 871.3 872.4 877.7 879.9 878.0 874.1 MAX. QFE PRESSURE IN HPA 883.7 883.3 881.0 880.5 876.7 875.9 878.5 876.8 879.9 883.7 889.0 885.4 889.0 DAY-HOUR 31- 6 11- 6 27- 6 2- 6 7- 6 16- 6 30- 6 23- 6 29- 6 16- 6 17- 6 4- 6 MIN. QFE PRESSURE IN HPA 866.1 864.5 865.0 869.1 864.9 860.9 861.3 862.2 863.1 871.4 873.5 869.0 860.9 DAY-HOUR 21-12 7- 3 24-15 22-12 26-15 24-15 11-15 31-12 1-12 1-12 21-12 15- 9 MEAN QNH PRESSURE IN HPA 1017.3 1017.7 1015.7 1015.6 1012.6 1010.4 1011.6 1012.6 1013.9 1019.9 1022.3 1020.2 1015.8 MAX. QNH PRESSURE IN HPA 1026.7 1026.2 1023.6 1023.1 1018.8 1017.9 1020.8 1018.9 1022.4 1026.7 1032.7 1028.6 1032.7 DAY-HOUR 31- 6 11- 6 27- 6 2- 6 7- 6 16- 6 30- 6 23- 6 29- 6 16- 6 17- 6 4- 6 MIN. QNH PRESSURE IN HPA 1006.8 1005.0 1005.5 1010.2 1005.4 1000.9 1001.4 1002.4 1003.4 1012.8 1015.1 1010.1 1000.9 DAY-HOUR 21-12 7- 3 24-15 22-12 26-15 24-15 11-15 31-12 1-12 1-12 21-12 15- 9 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 875.8 875.9 874.5 874.6 872.5 870.5 871.2 872.1 873.1 878.1 880.0 878.1 874.7 MAX. QFE PRESSURE IN HPA 883.3 883.1 879.7 878.7 876.2 875.1 877.9 875.8 878.3 882.9 887.9 884.0 887.9 DAY 31 11 27 2 7 14 31 20 29 16 17 4 MIN. QFE PRESSURE IN HPA 868.0 864.5 867.9 869.9 868.5 865.3 864.8 865.0 865.2 872.0 875.1 870.4 864.5 DAY 21 7 25 21 27 24 11 31 1 1 6 15 MEAN QNH PRESSURE IN HPA 1017.7 1017.8 1016.3 1016.4 1014.1 1011.7 1012.6 1013.6 1014.7 1020.3 1022.5 1020.3 1016.5 MAX. QNH PRESSURE IN HPA 1026.2 1026.0 1022.2 1021.0 1018.2 1017.0 1020.1 1017.7 1020.6 1025.8 1031.4 1027.0 1031.4 DAY 31 11 27 2 7 14 31 20 29 16 17 4 MIN. QNH PRESSURE IN HPA 1008.9 1005.0 1008.8 1011.1 1009.5 1005.9 1005.3 1005.5 1005.8 1013.5 1017.0 1011.6 1005.0 DAY 21 7 25 21 27 24 11 31 1 1 6 15 MEAN QFF PRESSURE IN HPA 1019.3 1018.3 1014.1 1009.1 1004.0 1000.2 1000.6 1001.9 1004.4 1014.8 1021.3 1021.1 1010.8 MAX. QFF PRESSURE IN HPA 1028.5 1028.5 1022.4 1016.4 1009.3 1009.9 1009.2 1007.8 1012.5 1023.2 1031.1 1028.0 1031.1 DAY 31 11 4 2 4 14 31 20 26 16 17 18 MIN. QFF PRESSURE IN HPA 1008.6 1003.1 1001.9 1001.2 997.3 992.6 992.0 992.8 994.2 1004.6 1013.8 1011.8 992.0 DAY 21 7 25 21 27 24 11 31 1 1 3 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 876.7 877.0 875.5 875.5 873.1 871.0 871.8 872.8 874.2 879.1 881.0 878.9 875.5 MAX. QFE PRESSURE IN HPA 883.7 883.3 881.0 880.5 876.7 875.9 878.5 876.8 879.9 883.7 889.0 885.4 889.0 DAY 31 11 27 2 7 16 30 23 29 16 17 4 MIN. QFE PRESSURE IN HPA 868.0 864.5 868.7 871.7 869.4 865.1 865.1 866.2 866.6 874.3 876.0 870.2 864.5 DAY 21 7 2 22 20 24 11 31 1 1 6 11 MEAN QNH PRESSURE IN HPA 1018.8 1019.1 1017.4 1017.4 1014.7 1012.3 1013.2 1014.4 1015.9 1021.4 1023.6 1021.2 1017.5 MAX. QNH PRESSURE IN HPA 1026.7 1026.2 1023.6 1023.1 1018.8 1017.9 1020.8 1018.9 1022.4 1026.7 1032.7 1028.6 1032.7 DAY 31 11 27 2 7 16 30 23 29 16 17 4 MIN. QNH PRESSURE IN HPA 1008.9 1005.0 1009.7 1013.1 1010.5 1005.7 1005.7 1006.9 1007.4 1016.1 1018.0 1011.4 1005.0 DAY 21 7 2 22 20 24 11 31 1 1 6 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 875.6 876.2 874.4 874.4 871.6 869.9 870.9 871.8 872.9 877.8 879.9 877.7 874.4 MAX. QFE PRESSURE IN HPA 882.3 882.0 879.9 879.1 875.6 875.3 877.2 875.8 878.9 882.7 887.9 884.0 887.9 DAY 31 29 27 2 5 16 30 20 29 16 17 4 MIN. QFE PRESSURE IN HPA 866.8 865.4 867.2 871.1 867.6 864.3 863.3 864.0 865.4 872.8 875.0 869.0 863.3 DAY 21 7 24 22 26 24 11 31 1 1 21 15 MEAN QNH PRESSURE IN HPA 1017.5 1018.2 1016.2 1016.1 1013.0 1011.1 1012.2 1013.2 1014.5 1020.0 1022.4 1019.9 1016.2 MAX. QNH PRESSURE IN HPA 1025.1 1024.8 1022.4 1021.5 1017.5 1017.2 1019.3 1017.7 1021.3 1025.5 1031.4 1027.0 1031.4 DAY 31 29 27 2 5 16 30 20 29 16 17 4 MIN. QNH PRESSURE IN HPA 1007.6 1006.0 1008.0 1012.4 1008.5 1004.8 1003.6 1004.4 1006.0 1014.4 1016.8 1010.1 1003.6 DAY 21 7 24 22 26 24 11 31 1 1 21 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 874.3 874.6 872.6 872.5 869.6 868.0 869.2 870.0 870.9 876.5 879.0 877.1 872.9 MAX. QFE PRESSURE IN HPA 881.1 881.3 877.3 876.9 873.5 873.9 876.2 874.4 877.4 881.6 886.7 882.8 886.7 DAY 30 10 27 2 5 16 30 20 29 16 17 4 MIN. QFE PRESSURE IN HPA 866.1 865.4 865.8 869.1 865.1 862.2 861.6 862.2 863.1 871.4 873.5 869.1 861.6 DAY 21 7 24 22 26 24 11 31 1 1 21 15 MEAN QNH PRESSURE IN HPA 1016.0 1016.4 1014.1 1014.0 1010.8 1008.9 1010.3 1011.2 1012.3 1018.6 1021.4 1019.3 1014.4 MAX. QNH PRESSURE IN HPA 1023.7 1024.0 1019.4 1019.0 1015.1 1015.6 1018.2 1016.2 1019.6 1024.3 1030.1 1025.7 1030.1 DAY 30 10 27 2 5 16 30 20 29 16 17 4 MIN. QNH PRESSURE IN HPA 1006.8 1006.0 1006.5 1010.2 1005.7 1002.4 1001.7 1002.4 1003.4 1012.8 1015.1 1010.2 1001.7 DAY 21 7 24 22 26 24 11 31 1 1 21 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 874.8 875.0 872.9 872.8 869.4 867.4 868.7 869.6 870.9 877.1 879.5 878.0 873.0 MAX. QFE PRESSURE IN HPA 882.3 881.7 877.7 876.4 872.9 872.6 875.8 874.2 878.3 882.4 886.5 883.5 886.5 DAY 30 10 3 2 3 16 30 20 29 15 17 4 MIN. QFE PRESSURE IN HPA 867.2 867.6 865.0 869.1 864.9 860.9 861.3 862.6 863.4 872.0 874.0 870.8 860.9 DAY 21 7 24 22 26 24 11 31 1 1 21 15 MEAN QNH PRESSURE IN HPA 1016.6 1016.8 1014.4 1014.4 1010.6 1008.2 1009.8 1010.7 1012.2 1019.2 1022.0 1020.3 1014.6 MAX. QNH PRESSURE IN HPA 1025.1 1024.4 1019.9 1018.4 1014.5 1014.1 1017.7 1015.9 1020.6 1025.2 1029.8 1026.4 1029.8 DAY 30 10 3 2 3 16 30 20 29 15 17 4 MIN. QNH PRESSURE IN HPA 1008.0 1008.5 1005.5 1010.2 1005.4 1000.9 1001.4 1002.8 1003.7 1013.5 1015.7 1012.1 1000.9 DAY 21 7 24 22 26 24 11 31 1 1 21 15 MEAN QFF PRESSURE IN HPA 1018.2 1017.2 1012.1 1006.9 1000.4 996.7 997.8 999.0 1001.9 1013.6 1020.8 1021.0 1008.8 MAX. QFF PRESSURE IN HPA 1026.9 1027.2 1020.8 1013.3 1006.1 1005.8 1006.4 1005.9 1012.1 1022.0 1030.4 1027.5 1030.4 DAY 30 10 3 2 3 13 30 20 29 15 17 4 MIN. QFF PRESSURE IN HPA 1006.9 1008.2 998.2 1002.2 992.9 987.2 987.8 990.3 992.5 1004.9 1012.8 1012.7 987.2 DAY 21 7 24 30 26 24 11 30 1 1 2 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.2 9.2 16.1 23.2 27.1 31.5 32.1 32.8 28.3 22.5 14.0 9.6 21.0 MINIMUN AIR TEMPERATURE (C) 0.2 2.6 9.3 15.4 18.9 23.4 24.4 24.5 20.5 15.5 7.7 4.8 13.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 9 25 29 27 15 0 0 0 106 DAYS WITH MINIMUM TEMP. <=-4 4 0 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH FREEZING MIN.<= 0 10 3 0 0 0 0 0 0 0 0 2 1 16 TEMPERATURE RECORDS LOWEST(C) -9.8 -2.0 1.6 10.4 12.6 15.6 20.4 19.5 14.2 9.4 -2.6 0.0 -9.8 DAY 28 1 12 10 4 13 18 17 22 28 20 23 MAXIMUM AIR TEMPERATURE (C) 8.8 13.6 21.0 28.1 32.2 36.3 37.1 37.8 33.1 27.5 18.8 13.4 25.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 24 27 31 31 25 6 0 0 151 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 16.2 19.8 28.6 32.0 38.8 41.8 44.2 41.2 37.6 33.2 28.2 20.6 44.2 DAY 15 28 31 4 17 29 9 24 5 1 7 20 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 11.0 11.7 12.7 13.3 12.9 12.7 13.3 12.6 12.0 11.1 8.6 11.7 MEAN DAILY TEMP. (MDT) (C) 4.5 8.1 15.2 21.7 25.5 29.9 30.7 31.2 26.8 21.5 13.2 9.1 19.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.6 41.7 143.8 266.9 301.3 314.7 176.2 36.3 0.7 0.0 1282.3 HEATING DEG. DAYS(BASE 18 0C) 418.4 278.1 97.4 1.8 0.0 0.0 0.0 0.0 0.0 3.2 149.7 275.7 1224.1 DEWPOINT (MEAN C) -5.2 -5.4 -2.4 -2.1 3.0 5.5 7.4 4.5 2.9 1.0 -4.5 -0.3 0.4 MIXING RATIO (G/KG) 3.09 3.03 3.85 3.89 5.65 6.78 8.02 6.46 5.62 4.80 3.33 4.52 4.92 VAPOUR PRESSURE (HPA) 4.34 4.24 5.38 5.43 7.84 9.36 11.03 8.95 7.82 6.72 4.67 6.33 6.84 SATURATION DEF. (HPA) 4.95 7.79 13.87 23.99 29.44 38.89 38.14 42.38 31.97 21.46 12.26 5.98 22.59 RELATIVE HUMIDITY (MEAN %) 52 39 33 20 24 22 24 19 21 26 31 55 31 RELATIVE HUMIDITY (MAX. %) 66 54 46 28 34 29 33 27 27 34 41 66 40 RELATIVE HUMIDITY (MIN. %) 41 27 24 14 17 17 18 14 16 20 23 47 23 RELATIVE HUMIDITY (MEAN% 03UTC) 63 53 44 27 33 29 33 27 27 33 38 65 39 RELATIVE HUMIDITY (MEAN% 09UTC) 47 34 29 18 20 20 21 17 19 23 28 51 27 RELATIVE HUMIDITY (MEAN% 15UTC) 56 35 29 18 20 18 18 16 18 24 33 55 28 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 14.4 9.0 12.7 0.0 12.8 0.7 0.0 0.3 0.4 0.0 1.4 8.8 60.5 DAYS WITH PRECIPITATION >=10 0 0 0 0 1 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 1 1 2 0 1 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 1 5 3 2 0 2 0 0 0 0 0 1 2 15 DAYS WITH PRECIPITATION 6 3 5 0 3 2 0 2 2 0 2 7 32 GREATEST DAILY PRECIPITATION 7.0 6.0 7.0 0.0 11.0 0.4 0.0 0.3 0.4 0.0 1.0 4.0 11.0 DAY 27 11 11 ** 3 15 ** 12 26 ** 13 2 DAY WITH THUNDER STORM 0 0 0 0 1 0 1 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 3 1 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH DUST 0 0 0 1 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 180 180 360 360 45 45 45 45 180 180 180 45 PREVAILING WIND SPEED(KNOTS) 11.3 12.3 14.4 8.1 7.6 11.7 12.9 11.9 12.1 10.8 12.2 11.7 11.1 PREVAILING WIND PERCENT 20.0 14.3 20.0 22.7 19.4 31.3 45.2 31.6 28.7 18.1 14.0 9.7 17.9 CALMS PERCENT OF WIND 51.0 58.6 34.2 18.7 19.4 14.7 24.5 21.9 30.7 29.0 62.7 78.7 36.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 145 180 196 230 234 28 42 58 53 34 208 176 58 VECTOR WIND MAGNITUDE(KNOTS) 1.2 0.8 0.6 1.6 2.4 3.7 6.5 3.6 2.9 0.6 1.4 1.0 0.8 WIND STEADINESES (MEAN %) 27.9 17.8 8.5 18.0 24.5 40.2 75.6 40.0 37.7 9.4 33.3 47.6 11.8 WIND SPEED (MEAN KNOTS) 4.3 4.5 7.1 8.9 9.8 9.2 8.6 9.0 7.7 6.4 4.2 2.1 6.8 FASTEST WIND DIRECTION 170 190 180 240 190 170 60 60 60 160 180 150 190 FASTEST WIND SPEED (KNOTS) 19 27 39 33 43 21 27 21 21 19 29 19 43 DAY 29 21 25 12 11 26 10 8 13 15 18 18 DAYS WITH SKY CLEAR (0-2)/8 18 19 20 19 21 27 28 29 30 28 20 13 272 DAYS WITH P.CLOUDY (3-6)/8 7 7 8 10 8 3 3 2 0 3 9 11 71 DAYS WITH CLOUDY (7-8)/8 6 2 3 1 2 0 0 0 0 0 1 7 22 DAYS WITH VISIBILITY =< 2 KM 4 0 0 0 0 0 0 0 0 0 0 0 4 DURATION OF SUNSHINE HOURS 205.1 232.0 262.0 274.2 317.1 370.6 351.4 358.8 307.6 278.8 219.9 163.4 3340.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 878.5 875.7 874.5 873.4 871.3 868.8 868.7 871.7 874.1 877.0 877.7 879.0 874.2 MAX. QFE PRESSURE IN HPA 882.4 885.0 883.3 882.0 875.9 876.9 876.2 877.0 881.9 885.3 885.5 884.1 885.5 DAY-HOUR 29- 6 9- 6 1- 6 2- 6 13- 6 2- 6 29- 6 14- 6 22- 6 10- 6 2- 6 9- 6 MIN. QFE PRESSURE IN HPA 872.4 861.5 862.6 866.9 863.9 860.9 860.3 864.9 867.2 870.9 864.8 871.3 860.3 DAY-HOUR 19-12 21-12 25-12 12-12 29-15 6-15 9-15 27-12 5-15 1-12 18-12 5-12 MEAN QNH PRESSURE IN HPA 1020.8 1017.6 1016.3 1015.1 1012.7 1009.8 1009.7 1013.1 1015.8 1019.1 1019.9 1021.4 1015.9 MAX. QNH PRESSURE IN HPA 1025.2 1028.1 1026.2 1024.8 1017.9 1019.0 1018.2 1019.1 1024.6 1028.5 1028.7 1027.1 1028.7 DAY-HOUR 29- 6 9- 6 1- 6 2- 6 13- 6 2- 6 29- 6 14- 6 22- 6 10- 6 2- 6 9- 6 MIN. QNH PRESSURE IN HPA 1013.9 1001.6 1002.8 1007.7 1004.3 1000.9 1000.2 1005.4 1008.0 1012.2 1005.3 1012.7 1000.2 DAY-HOUR 19-12 21-12 25-12 12-12 29-15 6-15 9-15 27-12 5-15 1-12 18-12 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 878.4 876.0 874.9 874.2 872.3 869.8 869.6 872.4 874.7 877.5 877.9 879.1 874.7 MAX. QFE PRESSURE IN HPA 881.5 883.6 882.3 881.6 875.7 876.5 875.5 876.4 881.0 883.8 883.9 883.2 883.9 DAY 30 10 2 2 23 2 29 14 22 10 2 18 MIN. QFE PRESSURE IN HPA 873.7 865.0 864.2 870.1 866.6 863.5 863.8 867.1 869.5 873.2 867.8 872.5 863.5 DAY 4 21 25 26 30 18 11 24 5 1 18 5 MEAN QNH PRESSURE IN HPA 1020.7 1018.0 1016.7 1016.0 1013.8 1011.0 1010.8 1013.9 1016.5 1019.7 1020.1 1021.5 1016.6 MAX. QNH PRESSURE IN HPA 1024.2 1026.6 1025.1 1024.3 1017.6 1018.5 1017.4 1018.4 1023.6 1026.8 1026.9 1026.1 1026.9 DAY 30 10 2 2 23 2 29 14 22 10 2 18 MIN. QNH PRESSURE IN HPA 1015.4 1005.5 1004.6 1011.3 1007.4 1003.9 1004.2 1007.9 1010.6 1014.8 1008.7 1014.0 1003.9 DAY 4 21 25 26 30 18 11 24 5 1 18 5 MEAN QFF PRESSURE IN HPA 1022.9 1017.9 1012.9 1008.7 1004.5 999.3 998.6 1002.0 1006.8 1012.8 1017.7 1020.9 1010.4 MAX. QFF PRESSURE IN HPA 1032.0 1027.2 1025.1 1017.9 1009.8 1008.8 1006.7 1008.4 1017.5 1021.1 1029.1 1027.3 1032.0 DAY 29 10 12 2 1 2 29 14 22 28 20 18 MIN. QFF PRESSURE IN HPA 1015.6 1002.2 998.1 1001.3 995.7 991.8 989.9 994.4 998.8 1004.7 1003.8 1013.7 989.9 DAY 4 21 25 26 30 18 11 24 5 1 18 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 879.5 877.0 875.9 875.1 872.9 870.4 870.2 873.2 875.7 878.5 878.9 880.2 875.6 MAX. QFE PRESSURE IN HPA 882.4 885.0 883.3 882.0 875.9 876.9 876.2 877.0 881.9 885.3 885.5 884.1 885.5 DAY 29 9 1 2 13 2 29 14 22 10 2 9 MIN. QFE PRESSURE IN HPA 874.7 864.9 865.8 869.5 867.4 864.2 864.5 867.5 870.5 873.9 868.5 873.2 864.2 DAY 4 21 25 9 30 18 10 27 5 1 18 5 MEAN QNH PRESSURE IN HPA 1021.9 1019.1 1017.9 1016.9 1014.4 1011.6 1011.5 1014.8 1017.7 1020.8 1021.3 1022.7 1017.6 MAX. QNH PRESSURE IN HPA 1025.2 1028.1 1026.2 1024.8 1017.9 1019.0 1018.2 1019.1 1024.6 1028.5 1028.7 1027.1 1028.7 DAY 29 9 1 2 13 2 29 14 22 10 2 9 MIN. QNH PRESSURE IN HPA 1016.5 1005.4 1006.5 1010.6 1008.3 1004.6 1005.0 1008.4 1011.8 1015.6 1009.5 1014.8 1004.6 DAY 4 21 25 9 30 18 10 27 5 1 18 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 878.7 876.1 875.0 874.0 871.7 869.4 869.3 872.2 874.7 877.3 877.9 879.2 874.6 MAX. QFE PRESSURE IN HPA 882.2 884.6 882.6 881.0 875.0 876.1 875.4 876.5 881.4 884.4 884.3 883.8 884.6 DAY 29 9 1 2 13 2 29 14 22 10 2 9 MIN. QFE PRESSURE IN HPA 873.9 864.2 864.0 868.2 865.7 863.6 863.0 866.5 869.6 872.5 867.1 872.1 863.0 DAY 4 21 25 9 30 18 9 27 5 1 18 5 MEAN QNH PRESSURE IN HPA 1021.0 1018.1 1016.9 1015.8 1013.2 1010.5 1010.4 1013.7 1016.5 1019.4 1020.1 1021.5 1016.4 MAX. QNH PRESSURE IN HPA 1025.0 1027.7 1025.4 1023.6 1016.8 1018.1 1017.3 1018.5 1024.1 1027.5 1027.3 1026.8 1027.7 DAY 29 9 1 2 13 2 29 14 22 10 2 9 MIN. QNH PRESSURE IN HPA 1015.6 1004.6 1004.4 1009.2 1006.3 1004.0 1003.3 1007.2 1010.7 1014.0 1007.9 1013.6 1003.3 DAY 4 21 25 9 30 18 9 27 5 1 18 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 877.6 874.5 873.2 872.0 869.9 867.5 867.4 870.5 872.8 875.6 876.6 878.1 873.0 MAX. QFE PRESSURE IN HPA 880.7 882.3 881.4 879.2 872.8 873.9 873.4 875.1 879.4 882.8 882.6 882.6 882.8 DAY 29 9 1 2 3 2 29 14 22 10 2 9 MIN. QFE PRESSURE IN HPA 872.4 861.5 862.6 866.9 864.4 861.9 861.0 864.9 867.5 870.9 864.8 871.3 861.0 DAY 19 21 25 12 30 6 9 27 5 1 18 5 MEAN QNH PRESSURE IN HPA 1019.8 1016.2 1014.8 1013.5 1011.1 1008.4 1008.3 1011.8 1014.3 1017.5 1018.7 1020.3 1014.6 MAX. QNH PRESSURE IN HPA 1023.3 1025.1 1024.1 1021.6 1014.4 1015.6 1015.0 1017.0 1021.8 1025.7 1025.4 1025.4 1025.7 DAY 29 9 1 2 3 2 29 14 22 10 2 9 MIN. QNH PRESSURE IN HPA 1013.9 1001.6 1002.8 1007.7 1004.9 1002.0 1001.0 1005.4 1008.4 1012.2 1005.3 1012.7 1001.0 DAY 19 21 25 12 30 6 9 27 5 1 18 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 878.3 874.8 873.4 871.9 869.8 866.9 866.8 870.1 872.7 875.9 877.3 878.7 873.0 MAX. QFE PRESSURE IN HPA 881.2 884.2 881.7 879.1 873.1 873.3 872.8 874.5 879.0 883.2 882.6 882.9 884.2 DAY 29 9 1 1 16 2 28 14 22 10 2 9 MIN. QFE PRESSURE IN HPA 874.0 863.2 863.2 867.4 863.9 860.9 860.3 865.1 867.2 871.7 865.3 872.0 860.3 DAY 19 21 25 12 29 6 9 27 5 6 18 5 MEAN QNH PRESSURE IN HPA 1020.5 1016.7 1015.1 1013.4 1010.9 1007.7 1007.5 1011.3 1014.2 1017.9 1019.5 1021.0 1014.6 MAX. QNH PRESSURE IN HPA 1023.9 1027.2 1024.4 1021.5 1014.7 1014.9 1014.4 1016.3 1021.4 1026.1 1025.4 1025.8 1027.2 DAY 29 9 1 1 16 2 28 14 22 10 2 9 MIN. QNH PRESSURE IN HPA 1015.7 1003.5 1003.5 1008.3 1004.3 1000.9 1000.2 1005.7 1008.0 1013.1 1005.9 1013.5 1000.2 DAY 19 21 25 12 29 6 9 27 5 6 18 5 MEAN QFF PRESSURE IN HPA 1022.7 1016.4 1011.2 1006.0 1001.5 995.9 995.3 999.3 1004.4 1010.9 1017.1 1020.4 1008.4 MAX. QFF PRESSURE IN HPA 1031.4 1028.4 1025.0 1015.1 1006.9 1005.8 1004.0 1005.7 1014.4 1019.9 1028.3 1027.1 1031.4 DAY 28 9 11 2 5 12 29 14 22 10 20 22 MIN. QFF PRESSURE IN HPA 1016.7 1000.6 999.3 998.4 993.2 987.4 985.5 992.0 995.8 1004.0 1001.2 1010.2 985.5 DAY 19 21 25 26 29 6 9 24 5 1 18 20 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.6 11.2 15.8 18.9 26.0 30.8 32.5 33.5 30.5 24.7 13.4 5.9 20.8 MINIMUN AIR TEMPERATURE (C) 1.6 4.9 8.6 12.9 18.6 22.5 24.7 25.9 22.5 17.7 8.5 0.8 14.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 9 20 31 31 24 2 0 0 118 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH FREEZING MIN.<= 0 16 4 0 0 0 0 0 0 0 0 0 17 37 TEMPERATURE RECORDS LOWEST(C) -3.0 -0.4 2.4 6.2 11.6 17.4 21.8 21.8 18.4 12.8 2.2 -4.4 -4.4 DAY 15 18 8 4 5 9 9 14 26 23 30 23 MAXIMUM AIR TEMPERATURE (C) 10.5 15.6 20.9 23.4 30.6 35.5 37.6 38.6 35.4 29.2 16.9 10.0 25.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 18 30 31 31 30 15 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) 22.2 24.0 27.8 32.6 38.0 40.2 42.4 42.6 39.6 33.2 26.8 16.4 42.6 DAY 7 25 27 28 29 6 16 7 11 5 12 8 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 10.7 12.3 10.5 12.0 13.0 12.9 12.7 12.9 11.5 8.4 9.2 11.3 MEAN DAILY TEMP. (MDT) (C) 6.0 10.2 14.7 18.2 24.6 29.0 31.1 32.3 29.0 23.4 12.7 5.4 19.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.2 21.2 124.6 239.7 314.1 349.7 238.5 86.2 1.3 0.0 1376.7 HEATING DEG. DAYS(BASE 18 0C) 370.8 217.2 112.7 54.9 0.4 0.0 0.0 0.0 0.0 0.0 166.0 390.1 1312.1 DEWPOINT (MEAN C) -4.0 -8.7 -7.6 1.7 0.2 1.9 3.7 2.8 -1.7 -0.6 0.7 -4.5 -1.3 MIXING RATIO (G/KG) 3.34 2.40 2.85 5.30 4.66 5.15 5.94 5.60 3.97 4.26 4.79 3.33 4.30 VAPOUR PRESSURE (HPA) 4.68 3.36 3.97 7.36 6.48 7.15 8.23 7.76 5.55 5.97 6.72 4.66 5.99 SATURATION DEF. (HPA) 5.62 10.68 14.94 15.74 28.70 38.66 42.14 45.55 39.27 26.21 9.38 4.93 23.49 RELATIVE HUMIDITY (MEAN %) 51 28 23 38 21 17 18 16 13 20 46 51 29 RELATIVE HUMIDITY (MAX. %) 65 39 36 54 30 23 27 23 18 26 59 70 39 RELATIVE HUMIDITY (MIN. %) 39 20 14 27 15 13 12 11 10 15 37 38 21 RELATIVE HUMIDITY (MEAN% 03UTC) 63 38 33 52 29 23 27 21 17 24 56 67 38 RELATIVE HUMIDITY (MEAN% 09UTC) 47 25 19 34 19 15 16 15 12 18 42 44 26 RELATIVE HUMIDITY (MEAN% 15UTC) 48 26 20 36 18 14 13 12 11 20 49 49 26 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 13.5 3.0 7.9 60.6 4.2 0.0 0.0 0.0 0.0 0.2 17.6 8.0 115.0 DAYS WITH PRECIPITATION >=10 0 0 0 3 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 1 0 0 3 0 0 0 0 0 0 2 0 6 DAYS WITH PRECIPITATION >= 1 3 1 4 6 1 0 0 0 0 0 4 3 22 DAYS WITH PRECIPITATION 6 1 4 8 3 0 0 1 0 1 6 4 34 GREATEST DAILY PRECIPITATION 9.0 3.0 3.0 27.0 3.0 0.0 0.0 0.0 0.0 0.2 8.0 4.0 27.0 DAY 12 20 23 12 3 ** ** ** ** 22 7 11 DAY WITH THUNDER STORM 0 0 0 1 0 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 2 1 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 0 0 1 0 0 1 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 180 180 180 180 360 45 45 45 45 180 180 315 45 PREVAILING WIND SPEED(KNOTS) 10.6 12.3 13.5 13.1 7.1 11.2 13.6 13.6 10.9 14.4 10.5 6.9 11.4 PREVAILING WIND PERCENT 11.0 17.9 17.4 14.7 22.6 26.0 44.5 41.9 24.7 18.7 16.7 11.0 16.5 CALMS PERCENT OF WIND 68.4 44.3 44.5 38.0 23.9 29.3 25.8 25.2 37.3 43.9 64.0 55.5 41.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 211 209 208 235 292 26 47 46 64 139 189 235 66 VECTOR WIND MAGNITUDE(KNOTS) 0.9 2.8 3.3 2.6 1.9 2.6 6.8 5.4 2.1 1.3 1.3 1.0 0.4 WIND STEADINESES (MEAN %) 30.0 43.7 47.1 37.1 23.7 34.7 80.0 60.7 33.3 22.4 37.1 28.6 6.3 WIND SPEED (MEAN KNOTS) 3.0 6.4 7.0 7.0 8.0 7.5 8.5 8.9 6.3 5.8 3.5 3.5 6.3 FASTEST WIND DIRECTION 180 240 210 270 210 180 50 40 60 170 170 210 270 FASTEST WIND SPEED (KNOTS) 19 29 31 39 27 35 27 23 21 23 17 21 39 DAY 7 25 22 29 10 5 21 6 9 20 11 26 DAYS WITH SKY CLEAR (0-2)/8 15 20 20 10 25 28 30 30 28 27 14 16 263 DAYS WITH P.CLOUDY (3-6)/8 13 6 7 13 6 2 1 1 2 4 12 8 75 DAYS WITH CLOUDY (7-8)/8 3 2 4 7 0 0 0 0 0 0 4 7 27 DAYS WITH VISIBILITY =< 2 KM 2 1 0 0 0 0 0 0 0 0 0 1 4 DURATION OF SUNSHINE HOURS 201.0 235.6 257.7 222.9 335.3 372.9 363.7 357.3 316.6 278.1 189.9 184.9 3315.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 877.3 876.6 874.9 872.3 872.1 870.2 870.1 869.1 874.5 877.4 879.6 877.1 874.3 MAX. QFE PRESSURE IN HPA 884.9 886.1 887.3 881.6 878.8 878.0 876.6 876.3 880.6 883.2 888.2 887.8 888.2 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 17- 6 25- 6 30- 6 31- 6 21- 6 10- 6 18- 6 3- 6 MIN. QFE PRESSURE IN HPA 868.1 865.6 865.6 860.4 866.7 861.2 862.4 862.4 868.8 871.7 870.5 863.9 860.4 DAY-HOUR 8-12 25-12 28-12 3-12 12-15 20-15 24-15 17-15 10-15 21-15 12-12 21-12 MEAN QNH PRESSURE IN HPA 1019.4 1018.7 1016.7 1013.8 1013.6 1011.4 1011.3 1010.2 1016.3 1019.6 1022.0 1019.2 1016.0 MAX. QNH PRESSURE IN HPA 1028.0 1029.4 1030.7 1024.3 1021.1 1020.2 1018.7 1018.3 1023.2 1026.1 1031.8 1031.3 1031.8 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 17- 6 25- 6 30- 6 31- 6 21- 6 10- 6 18- 6 3- 6 MIN. QNH PRESSURE IN HPA 1009.0 1006.2 1006.2 1000.3 1007.5 1001.3 1002.6 1002.6 1009.8 1013.1 1011.8 1004.3 1000.3 DAY-HOUR 8-12 25-12 28-12 3-12 12-15 20-15 24-15 17-15 10-15 21-15 12-12 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 877.2 876.8 875.4 872.7 872.8 871.4 871.1 870.0 875.0 877.8 879.6 877.2 874.7 MAX. QFE PRESSURE IN HPA 884.2 884.9 885.8 880.2 877.3 877.9 875.9 875.0 879.6 882.1 886.7 885.6 886.7 DAY 26 6 11 1 17 25 30 31 22 10 18 3 MIN. QFE PRESSURE IN HPA 868.8 869.2 869.2 864.6 868.1 864.6 866.5 865.1 871.2 874.2 873.1 867.4 864.6 DAY 8 25 21 4 20 19 25 17 10 22 12 21 MEAN QNH PRESSURE IN HPA 1019.3 1018.9 1017.3 1014.3 1014.4 1012.7 1012.4 1011.2 1016.9 1020.0 1022.1 1019.3 1016.6 MAX. QNH PRESSURE IN HPA 1027.2 1028.0 1029.0 1022.7 1019.4 1020.1 1017.9 1016.8 1022.0 1024.9 1030.1 1028.8 1030.1 DAY 26 6 11 1 17 25 30 31 22 10 18 3 MIN. QNH PRESSURE IN HPA 1009.8 1010.3 1010.3 1005.1 1009.0 1005.1 1007.2 1005.7 1012.6 1015.9 1014.7 1008.3 1005.1 DAY 8 25 21 4 20 19 25 17 10 22 12 21 MEAN QFF PRESSURE IN HPA 1020.4 1017.6 1013.7 1008.8 1005.4 1001.4 1000.3 998.6 1006.2 1012.3 1019.6 1020.7 1010.4 MAX. QFF PRESSURE IN HPA 1030.0 1028.3 1028.7 1019.8 1011.9 1010.3 1007.1 1005.7 1012.0 1016.1 1030.0 1031.3 1031.3 DAY 25 6 11 1 14 25 30 31 22 10 18 5 MIN. QFF PRESSURE IN HPA 1006.9 1006.3 1003.1 1002.8 997.5 992.1 994.5 992.8 1000.6 1007.3 1007.5 1007.8 992.1 DAY 8 25 28 4 20 19 25 18 11 22 12 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 878.3 878.0 876.5 873.4 873.6 871.9 871.8 870.8 876.1 879.0 880.7 878.3 875.7 MAX. QFE PRESSURE IN HPA 884.9 886.1 887.3 881.6 878.8 878.0 876.6 876.3 880.6 883.2 888.2 887.8 888.2 DAY 26 6 11 1 17 25 30 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 869.9 869.5 870.0 865.1 869.1 865.6 867.1 865.8 872.0 875.3 874.1 867.4 865.1 DAY 8 25 28 4 20 20 24 17 10 30 12 21 MEAN QNH PRESSURE IN HPA 1020.6 1020.2 1018.5 1015.0 1015.2 1013.4 1013.2 1012.1 1018.1 1021.3 1023.3 1020.6 1017.6 MAX. QNH PRESSURE IN HPA 1028.0 1029.4 1030.7 1024.3 1021.1 1020.2 1018.7 1018.3 1023.2 1026.1 1031.8 1031.3 1031.8 DAY 26 6 11 1 17 25 30 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1011.1 1010.6 1011.2 1005.7 1010.2 1006.2 1007.9 1006.5 1013.5 1017.2 1015.8 1008.3 1005.7 DAY 8 25 28 4 20 20 24 17 10 30 12 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 877.6 877.2 875.5 872.6 872.7 870.8 870.8 869.7 875.1 877.8 879.8 877.2 874.7 MAX. QFE PRESSURE IN HPA 884.5 884.9 886.5 880.6 877.3 877.5 875.2 875.3 879.7 882.6 887.5 887.1 887.5 DAY 26 6 11 1 17 25 30 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 869.5 867.7 867.5 864.0 868.4 863.8 865.3 864.9 871.1 874.2 872.3 866.2 863.8 DAY 8 25 28 3 20 20 24 17 10 30 12 21 MEAN QNH PRESSURE IN HPA 1019.8 1019.3 1017.4 1014.2 1014.2 1012.1 1012.1 1010.9 1016.9 1020.0 1022.2 1019.4 1016.5 MAX. QNH PRESSURE IN HPA 1027.6 1028.0 1029.8 1023.2 1019.4 1019.7 1017.1 1017.2 1022.2 1025.4 1031.0 1030.5 1031.0 DAY 26 6 11 1 17 25 30 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1010.6 1008.6 1008.4 1004.4 1009.4 1004.2 1005.9 1005.4 1012.4 1015.9 1013.8 1006.9 1004.2 DAY 8 25 28 3 20 20 24 17 10 30 12 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 876.3 875.5 873.5 871.2 871.0 868.9 868.9 867.8 873.3 876.2 878.6 876.1 873.1 MAX. QFE PRESSURE IN HPA 883.4 883.2 883.8 878.4 875.4 875.5 873.6 873.3 877.9 880.9 886.3 885.8 886.3 DAY 27 6 11 1 17 25 29 31 29 10 18 3 MIN. QFE PRESSURE IN HPA 868.1 865.6 865.6 860.4 867.0 861.8 863.4 862.7 868.9 872.2 870.5 863.9 860.4 DAY 8 25 28 3 20 20 24 17 10 21 12 21 MEAN QNH PRESSURE IN HPA 1018.3 1017.4 1015.2 1012.6 1012.3 1009.9 1009.9 1008.7 1014.9 1018.2 1020.9 1018.1 1014.7 MAX. QNH PRESSURE IN HPA 1026.3 1026.1 1026.8 1020.7 1017.3 1017.4 1015.3 1014.9 1020.1 1023.5 1029.6 1029.0 1029.6 DAY 27 6 11 1 17 25 29 31 29 10 18 3 MIN. QNH PRESSURE IN HPA 1009.0 1006.2 1006.2 1000.3 1007.8 1001.9 1003.7 1003.0 1010.0 1013.7 1011.8 1004.3 1000.3 DAY 8 25 28 3 20 20 24 17 10 21 12 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 876.9 875.8 873.6 871.4 870.7 868.2 868.2 867.4 873.2 876.5 879.2 876.8 873.2 MAX. QFE PRESSURE IN HPA 883.7 883.2 884.0 878.0 875.1 874.4 873.2 872.6 878.5 881.3 886.6 885.8 886.6 DAY 27 6 10 1 17 24 29 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 870.4 867.0 866.4 863.4 866.7 861.2 862.4 862.4 868.8 871.7 873.0 863.9 861.2 DAY 7 25 22 3 12 20 24 17 10 21 13 21 MEAN QNH PRESSURE IN HPA 1019.0 1017.8 1015.3 1012.8 1012.0 1009.2 1009.2 1008.3 1014.8 1018.5 1021.6 1018.9 1014.8 MAX. QNH PRESSURE IN HPA 1026.7 1026.1 1027.0 1020.2 1017.0 1016.2 1014.8 1014.1 1020.8 1024.0 1029.9 1029.0 1029.9 DAY 27 6 10 1 17 24 29 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1011.6 1007.8 1007.1 1003.7 1007.5 1001.3 1002.6 1002.6 1009.8 1013.1 1014.6 1004.3 1001.3 DAY 7 25 22 3 12 20 24 17 10 21 13 21 MEAN QFF PRESSURE IN HPA 1020.1 1016.5 1011.6 1007.2 1002.9 997.8 997.0 995.7 1004.1 1010.7 1019.2 1020.3 1008.6 MAX. QFF PRESSURE IN HPA 1028.5 1026.6 1025.8 1016.2 1009.1 1006.3 1003.9 1003.4 1011.3 1016.0 1029.8 1029.7 1029.8 DAY 25 4 10 1 2 24 29 31 29 31 18 3 MIN. QFF PRESSURE IN HPA 1009.0 1003.1 1001.1 1000.4 995.6 988.9 990.2 989.9 998.4 1004.8 1008.9 1003.8 988.9 DAY 7 25 26 3 29 19 24 17 10 21 12 21 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.6 9.1 13.0 20.1 24.0 30.6 35.3 31.9 27.7 24.5 12.2 6.4 20.2 MINIMUN AIR TEMPERATURE (C) 2.5 2.7 6.3 13.8 16.4 23.1 28.2 24.0 19.7 17.7 6.5 2.1 13.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 1 25 31 30 15 4 0 0 107 DAYS WITH MINIMUM TEMP. <=-4 2 1 0 0 0 0 0 0 0 0 0 3 6 DAYS WITH FREEZING MIN.<= 0 7 3 3 0 0 0 0 0 0 0 0 8 21 TEMPERATURE RECORDS LOWEST(C) -7.2 -5.0 -1.4 5.4 10.2 16.0 23.2 19.2 13.6 14.2 0.4 -5.4 -7.2 DAY 20 18 2 18 1 7 1 31 28 31 25 12 MAXIMUM AIR TEMPERATURE (C) 11.6 13.9 17.8 24.6 28.7 35.8 40.7 36.9 32.7 28.5 16.2 10.0 24.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 6 13 29 31 31 22 7 0 0 139 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.4 21.8 25.6 32.4 33.4 42.6 44.4 40.4 36.8 33.4 24.6 20.0 44.4 DAY 15 20 19 7 22 23 17 6 7 3 11 19 DIF. BETWEEN (MAX.-MIN.) (C) 9.1 11.2 11.5 10.8 12.3 12.7 12.5 12.9 13.0 10.8 9.7 7.9 11.2 MEAN DAILY TEMP. (MDT) (C) 7.1 8.3 12.0 19.2 22.6 29.5 34.5 30.5 26.2 23.1 11.3 6.1 19.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 37.2 69.4 253.5 417.0 293.8 156.6 68.0 0.0 0.0 1295.7 HEATING DEG. DAYS(BASE 18 0C) 338.9 271.7 185.6 40.4 5.7 0.0 0.0 0.0 0.0 0.0 200.5 370.0 1412.8 DEWPOINT (MEAN C) -4.8 -4.8 -5.5 2.3 -1.2 4.9 8.9 2.7 2.8 -1.1 -4.7 -1.6 -0.2 MIXING RATIO (G/KG) 3.21 3.23 3.13 5.44 4.36 6.54 8.58 5.54 5.55 4.26 3.24 4.11 4.77 VAPOUR PRESSURE (HPA) 4.50 4.51 4.37 7.58 6.09 9.03 11.78 7.69 7.72 5.95 4.56 5.76 6.63 SATURATION DEF. (HPA) 6.56 7.58 11.38 17.35 24.81 36.41 47.00 41.00 30.85 25.47 10.34 4.32 21.92 RELATIVE HUMIDITY (MEAN %) 49 42 30 36 21 21 22 17 21 20 33 61 31 RELATIVE HUMIDITY (MAX. %) 60 60 47 49 30 30 29 24 29 26 43 73 42 RELATIVE HUMIDITY (MIN. %) 40 29 20 27 15 16 17 12 17 16 26 50 24 RELATIVE HUMIDITY (MEAN% 03UTC) 56 59 44 48 28 30 28 23 28 25 42 70 40 RELATIVE HUMIDITY (MEAN% 09UTC) 44 37 27 32 18 19 20 16 20 18 29 58 28 RELATIVE HUMIDITY (MEAN% 15UTC) 52 37 25 33 18 17 17 13 18 19 30 61 28 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 36.3 12.0 2.4 18.3 3.1 0.0 0.0 0.0 0.0 0.0 4.8 31.9 108.8 DAYS WITH PRECIPITATION >=10 1 1 0 1 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 5 4 1 0 1 0 0 0 0 0 0 0 2 8 DAYS WITH PRECIPITATION >= 1 4 1 1 3 1 0 0 0 0 0 1 7 18 DAYS WITH PRECIPITATION 7 1 3 6 4 0 0 0 0 0 3 8 32 GREATEST DAILY PRECIPITATION 13.0 12.0 1.0 12.0 2.0 0.0 0.0 0.0 0.0 0.0 4.0 12.0 13.0 DAY 19 17 26 22 29 ** ** ** ** ** 29 31 DAY WITH THUNDER STORM 0 0 0 1 2 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 3 1 0 0 0 0 0 0 0 0 0 2 6 DAYS WITH DUST 0 0 4 0 1 0 0 0 0 0 2 0 7 WIND DIRECTION (PREVAILING) 180 315 45 315 360 45 45 45 45 180 315 180 45 PREVAILING WIND SPEED(KNOTS) 12.0 9.5 8.4 9.5 8.3 10.1 13.6 13.3 11.8 14.0 7.5 9.5 10.9 PREVAILING WIND PERCENT 21.3 13.6 16.1 19.3 22.6 26.0 32.9 44.5 32.7 28.4 15.3 14.2 18.3 CALMS PERCENT OF WIND 43.9 42.9 28.4 25.3 22.6 12.7 15.5 21.3 20.0 31.6 54.0 56.8 31.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 193 268 200 242 356 9 21 47 43 182 349 215 27 VECTOR WIND MAGNITUDE(KNOTS) 2.6 1.1 1.9 1.8 2.1 3.7 4.4 5.9 3.2 3.1 0.5 0.7 0.7 WIND STEADINESES (MEAN %) 46.4 19.3 23.2 22.2 26.9 44.0 46.3 61.5 38.6 41.3 12.2 17.9 9.7 WIND SPEED (MEAN KNOTS) 5.6 5.7 8.2 8.1 7.8 8.4 9.5 9.6 8.3 7.5 4.1 3.9 7.2 FASTEST WIND DIRECTION 170 210 190 180 270 320 80 60 60 180 180 240 190 FASTEST WIND SPEED (KNOTS) 29 33 47 29 31 27 27 27 21 25 16 27 47 DAY 4 20 19 7 28 16 6 28 29 27 1 20 DAYS WITH SKY CLEAR (0-2)/8 18 17 21 10 20 27 29 30 30 24 20 18 264 DAYS WITH P.CLOUDY (3-6)/8 7 9 6 11 11 2 2 1 0 7 7 5 68 DAYS WITH CLOUDY (7-8)/8 6 2 4 9 0 1 0 0 0 0 3 8 33 DAYS WITH VISIBILITY =< 2 KM 2 1 1 0 0 0 0 0 0 0 0 6 10 DURATION OF SUNSHINE HOURS 183.7 211.2 233.1 200.8 304.0 344.7 342.4 366.0 321.7 268.5 224.7 169.7 3170.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 877.0 873.1 873.7 874.5 874.9 869.5 866.3 871.6 873.8 877.1 879.4 880.0 874.2 MAX. QFE PRESSURE IN HPA 883.8 880.6 885.1 881.6 882.8 875.6 874.1 876.5 881.8 883.0 889.8 889.4 889.8 DAY-HOUR 12- 6 6- 6 2- 6 8- 3 2- 6 3- 6 3- 6 30- 6 23- 6 15- 6 25- 6 12- 6 MIN. QFE PRESSURE IN HPA 861.4 860.3 859.9 868.1 868.5 860.9 860.8 866.4 867.1 871.5 870.9 869.1 859.9 DAY-HOUR 28-12 20-12 26-12 28-12 23-15 30-15 7-15 1-15 7-12 27-15 14-12 6-12 MEAN QNH PRESSURE IN HPA 1019.1 1014.7 1015.4 1016.3 1016.7 1010.6 1007.0 1013.0 1015.5 1019.2 1021.8 1022.5 1016.0 MAX. QNH PRESSURE IN HPA 1026.8 1023.2 1028.3 1024.3 1025.7 1017.5 1015.8 1018.5 1024.5 1025.9 1033.6 1033.1 1033.6 DAY-HOUR 12- 6 6- 6 2- 6 8- 3 2- 6 3- 6 3- 6 30- 6 23- 6 15- 6 25- 6 12- 6 MIN. QNH PRESSURE IN HPA 1001.5 1000.2 999.8 1009.0 1009.5 1000.9 1000.8 1007.1 1007.9 1012.9 1012.2 1010.2 999.8 DAY-HOUR 28-12 20-12 26-12 28-12 23-15 30-15 7-15 1-15 7-12 27-15 14-12 6-12 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 877.1 873.4 874.2 874.9 875.7 870.5 866.9 872.3 874.4 877.4 879.6 879.9 874.7 MAX. QFE PRESSURE IN HPA 882.9 879.5 883.2 881.6 882.0 874.9 873.5 875.8 881.2 881.8 888.6 888.5 888.6 DAY 12 7 2 8 2 3 4 30 27 15 25 12 MIN. QFE PRESSURE IN HPA 869.1 863.3 865.6 869.8 870.7 863.1 863.3 867.5 868.8 872.8 873.5 872.6 863.1 DAY 29 19 13 21 23 30 1 1 7 27 14 6 MEAN QNH PRESSURE IN HPA 1019.2 1015.1 1016.0 1016.7 1017.7 1011.7 1007.7 1013.8 1016.2 1019.5 1022.0 1022.3 1016.5 MAX. QNH PRESSURE IN HPA 1025.8 1021.9 1026.1 1024.3 1024.8 1016.7 1015.1 1017.7 1023.9 1024.5 1032.2 1032.1 1032.2 DAY 12 7 2 8 2 3 4 30 27 15 25 12 MIN. QNH PRESSURE IN HPA 1010.2 1003.6 1006.2 1011.0 1012.0 1003.4 1003.6 1008.4 1009.8 1014.4 1015.1 1014.1 1003.4 DAY 29 19 13 21 23 30 1 1 7 27 14 6 MEAN QFF PRESSURE IN HPA 1019.8 1014.6 1013.7 1010.6 1009.9 1000.3 993.9 1002.1 1006.6 1011.7 1020.3 1023.3 1010.6 MAX. QFF PRESSURE IN HPA 1025.9 1022.6 1029.2 1016.6 1019.9 1008.1 1002.5 1007.0 1017.1 1017.2 1034.0 1038.1 1038.1 DAY 21 7 3 3 2 7 4 31 27 15 25 12 MIN. QFF PRESSURE IN HPA 1007.0 1004.9 1002.0 1002.4 1001.7 990.3 989.4 995.0 998.8 1006.1 1011.6 1012.3 989.4 DAY 16 20 26 28 23 30 30 1 7 27 14 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 878.1 874.5 875.3 875.7 876.3 871.1 867.8 873.2 875.4 878.5 880.6 881.0 875.6 MAX. QFE PRESSURE IN HPA 883.8 880.6 885.1 880.8 882.8 875.6 874.1 876.5 881.8 883.0 889.8 889.4 889.8 DAY 12 6 2 3 2 3 3 30 23 15 25 12 MIN. QFE PRESSURE IN HPA 869.6 863.4 866.3 870.3 871.2 864.5 864.4 868.8 869.6 873.4 874.2 870.8 863.4 DAY 28 19 13 14 8 30 30 1 7 27 14 6 MEAN QNH PRESSURE IN HPA 1020.4 1016.3 1017.2 1017.6 1018.3 1012.5 1008.7 1014.8 1017.3 1020.8 1023.2 1023.6 1017.6 MAX. QNH PRESSURE IN HPA 1026.8 1023.2 1028.3 1023.4 1025.7 1017.5 1015.8 1018.5 1024.5 1025.9 1033.6 1033.1 1033.6 DAY 12 6 2 3 2 3 3 30 23 15 25 12 MIN. QNH PRESSURE IN HPA 1010.7 1003.7 1007.0 1011.5 1012.6 1005.0 1004.9 1009.8 1010.7 1015.0 1015.9 1012.1 1003.7 DAY 28 19 13 14 8 30 30 1 7 27 14 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 877.3 873.6 874.2 875.0 875.3 870.1 867.0 872.2 874.4 877.5 879.6 880.2 874.7 MAX. QFE PRESSURE IN HPA 882.5 880.2 885.0 880.2 881.9 874.4 873.6 875.6 881.0 882.4 888.7 888.5 888.7 DAY 12 12 2 8 2 3 3 30 27 15 25 12 MIN. QFE PRESSURE IN HPA 866.2 863.0 864.1 869.5 870.1 863.8 863.6 868.3 868.8 873.4 872.6 869.8 863.0 DAY 28 19 26 28 8 30 30 1 7 26 14 6 MEAN QNH PRESSURE IN HPA 1019.4 1015.3 1015.9 1016.8 1017.2 1011.3 1007.9 1013.6 1016.2 1019.7 1022.0 1022.7 1016.5 MAX. QNH PRESSURE IN HPA 1025.3 1022.7 1028.1 1022.7 1024.6 1016.2 1015.3 1017.5 1023.6 1025.2 1032.3 1032.1 1032.3 DAY 12 12 2 8 2 3 3 30 27 15 25 12 MIN. QNH PRESSURE IN HPA 1006.9 1003.3 1004.5 1010.6 1011.3 1004.2 1004.0 1009.3 1009.8 1015.0 1014.1 1011.0 1003.3 DAY 28 19 26 28 8 30 30 1 7 26 14 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 876.1 871.8 872.4 873.5 873.6 868.1 865.2 870.3 872.5 876.0 878.3 879.1 873.1 MAX. QFE PRESSURE IN HPA 881.9 879.0 883.9 878.5 880.3 872.9 871.4 873.3 879.5 881.1 887.8 886.3 887.8 DAY 12 12 2 3 2 3 3 30 27 15 25 11 MIN. QFE PRESSURE IN HPA 861.4 860.3 859.9 868.1 868.7 861.3 861.9 866.9 867.1 871.9 870.9 869.1 859.9 DAY 28 20 26 28 23 30 30 1 7 27 14 6 MEAN QNH PRESSURE IN HPA 1018.1 1013.2 1013.9 1015.1 1015.2 1009.1 1005.7 1011.6 1014.0 1017.9 1020.6 1021.5 1014.7 MAX. QNH PRESSURE IN HPA 1024.6 1021.4 1026.9 1020.8 1022.8 1014.5 1012.8 1014.9 1021.9 1023.7 1031.3 1029.6 1031.3 DAY 12 12 2 3 2 3 3 30 27 15 25 11 MIN. QNH PRESSURE IN HPA 1001.5 1000.2 999.8 1009.0 1009.7 1001.4 1002.0 1007.7 1007.9 1013.3 1012.2 1010.2 999.8 DAY 28 20 26 28 23 30 30 1 7 27 14 6 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 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 876.7 872.4 872.6 873.8 873.6 867.6 864.4 869.9 872.4 876.0 878.9 879.8 873.2 MAX. QFE PRESSURE IN HPA 882.1 879.4 884.0 880.5 880.2 873.2 870.4 873.0 879.2 880.9 888.2 887.9 888.2 DAY 11 12 2 8 2 3 3 11 26 15 25 11 MIN. QFE PRESSURE IN HPA 863.2 861.0 862.2 868.7 868.5 860.9 860.8 866.4 867.1 871.5 871.7 870.5 860.8 DAY 28 20 26 20 23 30 7 1 7 27 14 6 MEAN QNH PRESSURE IN HPA 1018.7 1013.9 1014.2 1015.5 1015.2 1008.5 1004.9 1011.1 1013.9 1018.0 1021.2 1022.3 1014.8 MAX. QNH PRESSURE IN HPA 1024.9 1021.8 1027.0 1023.1 1022.7 1014.8 1011.6 1014.6 1021.6 1023.5 1031.8 1031.4 1031.8 DAY 11 12 2 8 2 3 3 11 26 15 25 11 MIN. QNH PRESSURE IN HPA 1003.5 1001.0 1002.4 1009.7 1009.5 1000.9 1000.8 1007.1 1007.9 1012.9 1013.1 1011.8 1000.8 DAY 28 20 26 20 23 30 7 1 7 27 14 6 MEAN QFF PRESSURE IN HPA 1019.2 1013.4 1011.8 1009.3 1007.3 997.0 991.0 999.3 1004.2 1010.1 1019.5 1023.2 1008.8 MAX. QFF PRESSURE IN HPA 1025.9 1022.3 1030.1 1015.5 1017.9 1005.2 998.6 1004.3 1014.8 1016.1 1033.0 1035.6 1035.6 DAY 22 28 2 18 2 6 3 30 27 15 25 12 MIN. QFF PRESSURE IN HPA 1003.9 996.6 996.7 1001.0 999.8 988.4 986.6 993.8 996.3 1004.5 1010.0 1010.9 986.6 DAY 28 20 26 28 23 30 7 1 7 2 14 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.0 11.5 16.0 18.2 25.2 31.5 32.0 33.6 28.0 22.1 14.7 5.3 20.4 MINIMUN AIR TEMPERATURE (C) 2.7 4.9 9.9 11.7 17.7 23.6 24.6 25.8 20.3 15.3 8.9 0.6 13.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 23 27 31 12 0 0 0 97 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 2 1 0 0 0 0 0 0 0 0 2 13 18 TEMPERATURE RECORDS LOWEST(C) -1.6 -0.8 0.4 4.0 12.4 19.0 19.4 22.2 15.0 11.4 -0.8 -3.0 -3.0 DAY 1 24 15 2 6 1 13 27 30 28 29 29 MAXIMUM AIR TEMPERATURE (C) 10.8 16.0 20.1 22.6 30.3 36.0 36.7 38.6 32.6 26.4 18.9 8.9 24.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 17 30 31 31 19 7 0 0 136 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.6 26.4 28.6 30.6 34.4 39.6 40.6 42.2 38.2 31.4 24.6 17.0 42.2 DAY 24 14 7 22 20 25 30 4 3 11 1 31 DIF. BETWEEN (MAX.-MIN.) (C) 8.1 11.1 10.2 10.9 12.6 12.4 12.1 12.8 12.3 11.1 10.0 8.3 11.0 MEAN DAILY TEMP. (MDT) (C) 6.7 10.4 15.0 17.2 24.0 29.8 30.6 32.2 26.4 20.8 13.9 4.8 19.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 5.7 7.8 98.5 263.3 299.1 346.6 162.5 32.2 0.0 0.0 1215.8 HEATING DEG. DAYS(BASE 18 0C) 349.6 219.1 120.0 60.1 0.3 0.0 0.0 0.0 0.0 3.7 125.2 410.5 1288.5 DEWPOINT (MEAN C) -0.8 -6.5 -2.6 0.7 4.0 3.0 4.6 3.5 -1.6 -1.6 -1.7 -2.9 -0.2 MIXING RATIO (G/KG) 4.29 2.82 3.75 4.82 6.00 5.65 6.49 5.89 4.10 4.03 4.25 3.76 4.65 VAPOUR PRESSURE (HPA) 5.99 3.95 5.26 6.71 8.33 7.83 8.97 8.14 5.72 5.66 5.94 5.26 6.48 SATURATION DEF. (HPA) 4.22 10.34 14.54 15.24 24.81 39.77 40.11 45.33 33.69 21.84 11.58 3.88 22.11 RELATIVE HUMIDITY (MEAN %) 62 31 35 35 28 18 20 16 16 22 36 60 32 RELATIVE HUMIDITY (MAX. %) 78 46 46 53 41 24 29 23 24 30 50 74 43 RELATIVE HUMIDITY (MIN. %) 48 21 27 24 20 14 15 12 11 17 26 49 24 RELATIVE HUMIDITY (MEAN% 03UTC) 76 44 45 49 40 24 28 23 23 29 47 72 42 RELATIVE HUMIDITY (MEAN% 09UTC) 57 27 32 31 24 16 18 14 14 20 32 54 28 RELATIVE HUMIDITY (MEAN% 15UTC) 59 29 33 31 24 15 16 13 13 20 36 62 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.5 5.6 19.9 17.5 5.1 0.0 1.0 0.0 0.0 0.0 2.7 50.4 134.7 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 2 2 DAYS WITH PRECIPITATION >= 5 3 1 2 1 0 0 0 0 0 0 0 3 10 DAYS WITH PRECIPITATION >= 1 6 1 4 4 2 0 1 0 0 0 1 8 27 DAYS WITH PRECIPITATION 9 3 6 8 2 0 1 0 0 0 5 10 44 GREATEST DAILY PRECIPITATION 9.0 5.0 8.6 7.0 4.0 0.0 1.0 0.0 0.0 0.0 1.0 15.0 15.0 DAY 27 7 20 25 5 ** 11 ** ** ** 19 10 DAY WITH THUNDER STORM 0 0 0 0 0 0 2 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 0 0 2 0 0 0 0 0 0 0 0 2 4 DAYS WITH DUST 0 2 0 0 2 0 0 0 0 0 0 0 4 WIND DIRECTION (PREVAILING) 180 180 180 315 180 45 45 45 45 180 180 180 45 PREVAILING WIND SPEED(KNOTS) 10.6 15.0 13.5 10.0 12.6 13.5 11.6 10.8 10.2 12.0 11.6 10.2 10.9 PREVAILING WIND PERCENT 16.8 19.3 18.1 18.7 14.8 32.7 27.1 43.9 32.0 16.1 14.7 11.6 18.7 CALMS PERCENT OF WIND 51.0 29.0 32.3 16.0 21.3 21.3 23.9 20.0 36.0 51.6 54.0 74.2 36.0 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 197 194 206 312 293 22 31 41 54 155 200 200 32 VECTOR WIND MAGNITUDE(KNOTS) 0.4 1.7 0.8 1.2 1.5 5.0 4.2 4.9 2.9 0.6 0.8 1.0 1.0 WIND STEADINESES (MEAN %) 9.3 21.2 11.9 13.3 17.0 52.1 54.5 59.8 43.3 12.0 16.7 41.7 14.7 WIND SPEED (MEAN KNOTS) 4.3 8.0 6.7 9.0 8.8 9.6 7.7 8.2 6.7 5.0 4.8 2.4 6.8 FASTEST WIND DIRECTION 150 210 170 310 290 30 300 70 60 210 210 210 210 FASTEST WIND SPEED (KNOTS) 29 39 23 29 35 29 29 29 23 23 31 19 39 DAY 13 23 5 17 14 28 10 25 3 22 23 12 DAYS WITH SKY CLEAR (0-2)/8 15 19 9 10 23 20 17 23 30 26 15 13 220 DAYS WITH P.CLOUDY (3-6)/8 10 9 15 13 7 9 14 8 0 5 11 12 113 DAYS WITH CLOUDY (7-8)/8 6 1 7 7 1 1 0 0 0 0 4 6 33 DAYS WITH VISIBILITY =< 2 KM 6 1 0 0 1 0 0 0 0 0 0 5 13 DURATION OF SUNSHINE HOURS 186.6 246.4 209.0 234.5 312.6 341.7 334.8 345.7 317.3 284.7 210.1 186.4 3209.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 874.8 875.8 876.7 873.5 871.8 870.3 870.3 869.6 875.7 879.5 877.5 877.6 874.4 MAX. QFE PRESSURE IN HPA 881.6 882.4 885.0 880.0 877.5 878.8 876.9 875.3 882.2 885.2 883.5 888.2 888.2 DAY-HOUR 1- 6 10- 6 9- 6 11- 6 4- 3 6- 6 18- 6 18- 6 30- 6 27- 6 29- 6 3- 6 MIN. QFE PRESSURE IN HPA 866.3 865.8 865.7 862.5 859.8 862.7 863.2 862.7 869.1 873.0 865.6 869.6 859.8 DAY-HOUR 23-15 15-12 31-15 17- 3 13-12 17-15 10-12 4-15 11-15 3-12 23-12 15-12 MEAN QNH PRESSURE IN HPA 1016.6 1017.7 1018.8 1015.2 1013.2 1011.5 1011.5 1010.7 1017.6 1021.9 1019.7 1019.8 1016.2 MAX. QNH PRESSURE IN HPA 1024.3 1025.2 1028.1 1022.5 1019.7 1021.1 1019.0 1017.2 1025.0 1028.4 1026.4 1031.8 1031.8 DAY-HOUR 1- 6 10- 6 9- 6 11- 6 4- 3 6- 6 18- 6 18- 6 30- 6 27- 6 29- 6 3- 6 MIN. QNH PRESSURE IN HPA 1007.0 1006.5 1006.3 1002.7 999.7 1003.0 1003.5 1003.0 1010.2 1014.6 1006.2 1010.7 999.7 DAY-HOUR 23-15 15-12 31-15 17- 3 13-12 17-15 10-12 4-15 11-15 3-12 23-12 15-12 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 874.8 875.8 877.1 873.9 872.9 871.4 871.2 870.4 876.3 879.8 877.8 877.8 874.9 MAX. QFE PRESSURE IN HPA 881.2 881.2 883.2 878.9 877.5 878.0 876.4 874.6 881.1 883.9 882.5 887.5 887.5 DAY 1 10 9 28 4 6 18 18 30 27 29 4 MIN. QFE PRESSURE IN HPA 867.6 868.0 869.7 862.5 863.5 866.7 866.2 865.5 871.2 874.6 867.8 870.9 862.5 DAY 27 15 31 17 13 18 10 4 12 3 23 15 MEAN QNH PRESSURE IN HPA 1016.6 1017.8 1019.2 1015.6 1014.5 1012.8 1012.6 1011.7 1018.3 1022.2 1020.1 1020.0 1016.8 MAX. QNH PRESSURE IN HPA 1023.9 1023.9 1026.1 1021.3 1019.7 1020.2 1018.4 1016.4 1023.7 1026.9 1025.3 1031.0 1031.0 DAY 1 10 9 28 4 6 18 18 30 27 29 4 MIN. QNH PRESSURE IN HPA 1008.5 1008.9 1010.9 1002.7 1003.9 1007.5 1006.9 1006.1 1012.6 1016.4 1008.7 1012.2 1002.7 DAY 27 15 31 17 13 18 10 4 12 3 23 15 MEAN QFF PRESSURE IN HPA 1017.1 1016.4 1015.5 1010.5 1005.9 1001.1 1000.6 999.1 1008.7 1015.6 1017.0 1021.8 1010.8 MAX. QFF PRESSURE IN HPA 1026.9 1023.2 1024.2 1017.3 1012.1 1009.7 1007.9 1005.0 1016.6 1022.1 1027.6 1034.1 1034.1 DAY 1 10 22 11 18 6 18 31 30 27 29 4 MIN. QFF PRESSURE IN HPA 1007.4 1002.6 1003.9 995.6 993.9 995.0 993.9 992.6 1001.2 1008.1 1003.2 1012.2 992.6 DAY 27 15 31 17 13 18 10 4 11 3 23 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 875.8 877.1 878.1 874.7 873.2 871.9 871.8 871.2 877.4 880.9 878.7 878.8 875.8 MAX. QFE PRESSURE IN HPA 881.6 882.4 885.0 880.0 877.5 878.8 876.9 875.3 882.2 885.2 883.5 888.2 888.2 DAY 1 10 9 11 18 6 18 18 30 27 29 3 MIN. QFE PRESSURE IN HPA 869.1 868.2 869.4 863.3 863.4 867.7 866.6 865.9 872.8 875.6 868.6 871.8 863.3 DAY 27 15 31 17 13 17 10 4 12 3 23 15 MEAN QNH PRESSURE IN HPA 1017.8 1019.2 1020.3 1016.5 1014.8 1013.4 1013.3 1012.6 1019.5 1023.5 1021.0 1021.2 1017.7 MAX. QNH PRESSURE IN HPA 1024.3 1025.2 1028.1 1022.5 1019.7 1021.1 1019.0 1017.2 1025.0 1028.4 1026.4 1031.8 1031.8 DAY 1 10 9 11 18 6 18 18 30 27 29 3 MIN. QNH PRESSURE IN HPA 1010.2 1009.2 1010.5 1003.6 1003.7 1008.6 1007.4 1006.6 1014.4 1017.5 1009.6 1013.2 1003.6 DAY 27 15 31 17 13 17 10 4 12 3 23 15 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 875.1 876.4 877.3 873.9 872.0 870.8 870.8 870.3 876.3 879.9 877.6 877.8 874.8 MAX. QFE PRESSURE IN HPA 881.1 881.9 883.8 879.3 875.7 877.4 876.4 874.5 880.9 884.4 882.3 887.8 887.8 DAY 12 10 9 12 18 6 18 30 30 27 30 3 MIN. QFE PRESSURE IN HPA 868.6 867.5 867.8 866.2 862.2 866.8 865.4 864.9 871.8 874.5 867.6 870.3 862.2 DAY 23 15 31 17 13 17 10 4 11 3 23 16 MEAN QNH PRESSURE IN HPA 1016.9 1018.4 1019.4 1015.6 1013.5 1012.1 1012.1 1011.5 1018.3 1022.4 1019.8 1020.0 1016.7 MAX. QNH PRESSURE IN HPA 1023.7 1024.6 1026.8 1021.7 1017.6 1019.6 1018.4 1016.3 1023.5 1027.5 1025.1 1031.3 1031.3 DAY 12 10 9 12 18 6 18 30 30 27 30 3 MIN. QNH PRESSURE IN HPA 1009.6 1008.4 1008.7 1006.9 1002.4 1007.6 1006.0 1005.4 1013.2 1016.3 1008.5 1011.5 1002.4 DAY 23 15 31 17 13 17 10 4 11 3 23 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 873.9 874.6 875.6 872.5 870.4 868.9 869.1 868.3 874.4 878.3 876.3 876.7 873.2 MAX. QFE PRESSURE IN HPA 880.2 880.5 882.0 878.3 876.8 876.0 875.1 872.7 879.7 882.8 881.2 886.8 886.8 DAY 12 8 9 11 22 6 18 30 27 27 30 3 MIN. QFE PRESSURE IN HPA 866.4 865.8 865.9 863.5 859.8 864.2 863.2 863.0 869.4 873.0 865.6 869.6 859.8 DAY 23 15 31 17 13 17 10 4 11 3 23 15 MEAN QNH PRESSURE IN HPA 1015.6 1016.4 1017.5 1014.1 1011.6 1010.0 1010.1 1009.3 1016.2 1020.6 1018.3 1018.8 1014.9 MAX. QNH PRESSURE IN HPA 1022.7 1023.1 1024.8 1020.6 1018.9 1018.0 1017.0 1014.2 1022.2 1025.7 1023.9 1030.2 1030.2 DAY 12 8 9 11 22 6 18 30 27 27 30 3 MIN. QNH PRESSURE IN HPA 1007.1 1006.5 1006.6 1003.9 999.7 1004.6 1003.5 1003.3 1010.5 1014.6 1006.2 1010.7 999.7 DAY 23 15 31 17 13 17 10 4 11 3 23 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 874.4 875.0 875.7 872.6 870.6 868.3 868.5 867.8 874.2 878.6 877.1 877.2 873.3 MAX. QFE PRESSURE IN HPA 880.2 880.4 882.5 878.1 877.4 875.8 873.7 872.3 879.9 883.0 881.6 887.2 887.2 DAY 11 8 9 11 22 6 18 30 27 27 28 3 MIN. QFE PRESSURE IN HPA 866.3 866.1 865.7 864.3 860.0 862.7 863.4 862.7 869.1 873.2 867.2 870.1 860.0 DAY 23 15 31 17 13 17 10 4 11 3 23 16 MEAN QNH PRESSURE IN HPA 1016.2 1016.9 1017.6 1014.1 1011.9 1009.3 1009.5 1008.7 1016.0 1020.9 1019.2 1019.4 1015.0 MAX. QNH PRESSURE IN HPA 1022.7 1022.9 1025.3 1020.3 1019.6 1017.7 1015.4 1013.8 1022.4 1025.9 1024.3 1030.6 1030.6 DAY 11 8 9 11 22 6 18 30 27 27 28 3 MIN. QNH PRESSURE IN HPA 1007.0 1006.8 1006.3 1004.8 999.9 1003.0 1003.7 1003.0 1010.2 1014.8 1008.0 1011.3 999.9 DAY 23 15 31 17 13 17 10 4 11 3 23 16 MEAN QFF PRESSURE IN HPA 1016.5 1015.4 1013.8 1008.9 1003.3 997.5 997.5 996.1 1006.4 1014.2 1016.2 1021.0 1008.9 MAX. QFF PRESSURE IN HPA 1023.2 1023.6 1023.6 1016.6 1012.0 1007.5 1005.1 1003.0 1014.3 1021.1 1026.0 1033.2 1033.2 DAY 12 8 22 11 4 6 18 30 27 27 30 3 MIN. QFF PRESSURE IN HPA 1006.7 1002.1 999.8 1000.0 990.4 990.9 990.9 988.8 998.2 1006.4 1002.4 1012.0 988.8 DAY 23 15 31 16 13 17 10 4 11 3 23 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.9 6.7 15.3 20.5 24.4 31.1 34.2 32.2 29.5 23.3 12.4 10.5 20.4 MINIMUN AIR TEMPERATURE (C) -0.2 1.3 8.2 13.6 16.9 23.1 26.9 24.7 21.4 15.7 6.8 5.0 13.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 0 21 31 28 20 0 0 0 101 DAYS WITH MINIMUM TEMP. <=-4 5 2 0 0 0 0 0 0 0 0 0 1 8 DAYS WITH FREEZING MIN.<= 0 15 14 0 0 0 0 0 0 0 0 0 5 34 TEMPERATURE RECORDS LOWEST(C) -7.8 -8.0 1.2 3.0 10.2 18.0 22.4 18.8 17.0 6.6 2.6 -4.4 -8.0 DAY 13 11 27 6 7 10 28 31 29 25 12 31 MAXIMUM AIR TEMPERATURE (C) 9.2 10.5 19.9 25.1 29.2 35.8 39.0 37.0 34.3 27.7 16.3 14.4 24.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 16 28 31 30 30 11 0 0 153 DAYS WITH MAXIMUM TEMP. <= 0 0 1 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 19.0 21.6 25.5 34.4 32.6 43.2 44.0 42.4 38.6 32.0 25.4 21.6 44.0 DAY 1 21 30 26 28 22 18 7 12 8 5 4 DIF. BETWEEN (MAX.-MIN.) (C) 9.4 9.2 11.7 11.5 12.3 12.7 12.1 12.3 12.9 12.0 9.5 9.4 11.3 MEAN DAILY TEMP. (MDT) (C) 4.5 5.9 14.0 19.4 23.1 29.4 32.9 30.9 27.9 21.7 11.6 9.7 19.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 39.7 72.5 253.1 370.2 305.8 206.3 62.1 0.0 0.0 1309.8 HEATING DEG. DAYS(BASE 18 0C) 417.8 338.4 126.4 51.7 2.2 0.0 0.0 0.0 0.0 18.2 196.4 257.6 1408.7 DEWPOINT (MEAN C) -4.1 -4.2 -4.7 -1.6 1.5 1.5 6.1 3.2 -0.6 -2.7 -0.2 -1.0 -0.6 MIXING RATIO (G/KG) 3.34 3.27 3.47 4.28 5.09 5.12 6.94 5.87 4.42 3.66 4.39 4.18 4.50 VAPOUR PRESSURE (HPA) 4.68 4.57 4.83 5.98 7.09 7.09 9.59 8.13 6.15 5.13 6.15 5.86 6.27 SATURATION DEF. (HPA) 4.35 6.02 13.32 19.95 24.48 39.84 45.75 41.89 36.43 24.73 8.88 7.42 22.76 RELATIVE HUMIDITY (MEAN %) 56 51 29 26 25 17 19 18 16 19 45 46 31 RELATIVE HUMIDITY (MAX. %) 71 70 47 38 40 24 26 27 22 25 59 58 42 RELATIVE HUMIDITY (MIN. %) 43 38 19 18 16 12 14 13 11 14 36 37 23 RELATIVE HUMIDITY (MEAN% 03UTC) 67 69 45 37 37 24 26 27 21 25 58 56 41 RELATIVE HUMIDITY (MEAN% 09UTC) 51 45 24 22 20 15 17 15 15 17 41 43 27 RELATIVE HUMIDITY (MEAN% 15UTC) 57 45 25 22 22 12 15 14 12 17 42 46 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 47.1 10.8 0.0 5.3 15.3 0.0 0.0 0.9 0.0 0.0 16.0 11.0 106.4 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 0 0 0 0 0 1 2 DAYS WITH PRECIPITATION >= 5 2 1 0 0 2 0 0 0 0 0 1 1 7 DAYS WITH PRECIPITATION >= 1 5 3 0 2 4 0 0 0 0 0 6 2 22 DAYS WITH PRECIPITATION 6 8 0 3 7 0 0 1 0 0 7 2 34 GREATEST DAILY PRECIPITATION 29.4 5.0 0.0 3.1 6.0 0.0 0.0 0.9 0.0 0.0 5.0 10.0 29.4 DAY 12 8 ** 17 15 ** ** 11 ** ** 8 18 DAY WITH THUNDER STORM 0 0 0 1 2 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 3 3 0 0 0 0 0 0 0 0 0 0 6 DAYS WITH DUST 0 1 1 2 2 1 0 1 0 0 0 0 8 WIND DIRECTION (PREVAILING) 180 180 180 315 315 45 45 45 45 180 180 180 45 PREVAILING WIND SPEED(KNOTS) 10.9 11.4 14.0 9.7 12.2 12.2 12.6 12.9 11.4 12.9 10.8 12.4 11.3 PREVAILING WIND PERCENT 17.4 14.3 19.4 18.7 19.4 30.0 39.4 47.7 34.7 21.9 14.7 17.4 19.9 CALMS PERCENT OF WIND 58.1 45.7 26.5 30.0 31.6 22.7 25.8 19.4 32.0 33.5 64.7 61.3 37.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 211 262 234 322 281 31 35 45 38 176 151 173 36 VECTOR WIND MAGNITUDE(KNOTS) 1.5 0.7 2.6 0.8 1.3 3.4 5.4 6.3 2.8 1.2 0.5 1.6 0.9 WIND STEADINESES (MEAN %) 36.6 12.5 29.9 9.9 15.1 40.0 64.3 64.9 37.8 16.4 14.7 40.0 12.9 WIND SPEED (MEAN KNOTS) 4.1 5.6 8.7 8.1 8.6 8.5 8.4 9.7 7.4 7.3 3.4 4.0 7.0 FASTEST WIND DIRECTION 220 180 180 210 300 190 60 60 30 190 180 210 210 FASTEST WIND SPEED (KNOTS) 23 27 35 54 31 25 23 25 23 27 19 25 54 DAY 23 21 31 3 13 22 17 5 18 21 5 23 DAYS WITH SKY CLEAR (0-2)/8 17 9 13 17 16 29 23 29 26 27 13 20 239 DAYS WITH P.CLOUDY (3-6)/8 11 11 13 7 15 1 8 2 4 4 13 7 96 DAYS WITH CLOUDY (7-8)/8 3 8 5 6 0 0 0 0 0 0 4 4 30 DAYS WITH VISIBILITY =< 2 KM 5 2 0 0 1 0 0 0 0 0 0 1 9 DURATION OF SUNSHINE HOURS 220.1 189.0 252.7 265.6 296.3 376.2 341.6 355.4 310.7 283.5 211.4 213.2 3315.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 876.1 874.7 873.1 876.0 873.4 870.0 869.0 870.3 872.7 878.3 879.2 879.3 874.3 MAX. QFE PRESSURE IN HPA 883.9 883.2 879.1 885.0 879.0 875.8 875.5 875.9 876.8 884.9 883.8 887.2 887.2 DAY-HOUR 9- 6 15- 6 28- 6 6- 6 19- 6 4- 6 28- 6 17- 6 9- 6 24- 6 27- 6 29- 6 MIN. QFE PRESSURE IN HPA 863.2 867.8 861.7 868.5 863.5 860.9 860.0 863.2 866.4 870.3 872.2 867.6 860.0 DAY-HOUR 23- 3 1-15 24-12 3-15 5-15 20-15 6-15 7-15 5-15 4-12 8-12 24- 3 MEAN QNH PRESSURE IN HPA 1018.1 1016.5 1014.7 1018.0 1015.0 1011.2 1010.0 1011.5 1014.2 1020.6 1021.6 1021.7 1016.1 MAX. QNH PRESSURE IN HPA 1026.9 1026.1 1021.5 1028.1 1021.4 1017.7 1017.4 1017.9 1018.9 1028.0 1026.8 1030.6 1030.6 DAY-HOUR 9- 6 15- 6 28- 6 6- 6 19- 6 4- 6 28- 6 17- 6 9- 6 24- 6 27- 6 29- 6 MIN. QNH PRESSURE IN HPA 1003.5 1008.7 1001.8 1009.5 1003.9 1000.9 999.9 1003.5 1007.1 1011.5 1013.7 1008.5 999.9 DAY-HOUR 23- 3 1-15 24-12 3-15 5-15 20-15 6-15 7-15 5-15 4-12 8-12 24- 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 876.0 874.7 873.7 876.7 874.2 871.2 869.7 871.1 873.4 878.8 879.5 879.3 874.9 MAX. QFE PRESSURE IN HPA 882.2 882.4 877.4 884.0 878.9 875.2 874.7 875.6 876.4 884.0 883.0 886.0 886.0 DAY 9 18 27 6 19 9 28 17 8 24 29 29 MIN. QFE PRESSURE IN HPA 863.2 868.5 865.2 869.8 864.6 864.6 862.3 864.5 869.2 873.2 872.8 867.6 862.3 DAY 23 2 24 27 6 20 6 8 5 21 6 24 MEAN QNH PRESSURE IN HPA 1018.0 1016.5 1015.3 1018.8 1016.0 1012.5 1010.9 1012.5 1015.1 1021.2 1021.9 1021.7 1016.7 MAX. QNH PRESSURE IN HPA 1025.0 1025.2 1019.6 1027.0 1021.3 1017.1 1016.5 1017.5 1018.4 1027.0 1025.9 1029.3 1029.3 DAY 9 18 27 6 19 9 28 17 8 24 29 29 MIN. QNH PRESSURE IN HPA 1003.5 1009.5 1005.8 1011.0 1005.1 1005.1 1002.5 1005.0 1010.3 1014.8 1014.4 1008.5 1002.5 DAY 23 2 24 27 6 20 6 8 5 21 6 24 MEAN QFF PRESSURE IN HPA 1020.1 1017.4 1011.9 1012.8 1007.9 1001.1 997.8 1000.4 1004.7 1014.1 1020.0 1020.7 1010.8 MAX. QFF PRESSURE IN HPA 1031.4 1028.0 1020.5 1026.4 1013.4 1008.3 1005.1 1006.7 1008.4 1024.6 1025.4 1033.1 1033.1 DAY 13 15 27 6 19 10 28 17 28 24 29 31 MIN. QFF PRESSURE IN HPA 1005.8 1005.5 1000.8 1000.5 997.3 992.5 988.9 990.9 998.3 1006.4 1008.4 1003.5 988.9 DAY 23 2 24 27 6 21 6 8 5 21 6 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 877.3 875.9 874.6 877.4 874.8 871.7 870.4 871.8 874.4 879.9 880.5 880.5 875.8 MAX. QFE PRESSURE IN HPA 883.9 883.2 879.1 885.0 879.0 875.8 875.5 875.9 876.8 884.9 883.8 887.2 887.2 DAY 9 15 28 6 19 4 28 17 9 24 27 29 MIN. QFE PRESSURE IN HPA 865.8 870.4 864.5 870.8 867.4 864.9 863.1 866.0 869.9 874.0 874.4 871.4 863.1 DAY 23 7 24 30 4 20 6 8 5 4 6 24 MEAN QNH PRESSURE IN HPA 1019.4 1017.9 1016.4 1019.6 1016.6 1013.1 1011.6 1013.2 1016.2 1022.4 1023.1 1023.1 1017.7 MAX. QNH PRESSURE IN HPA 1026.9 1026.1 1021.5 1028.1 1021.4 1017.7 1017.4 1017.9 1018.9 1028.0 1026.8 1030.6 1030.6 DAY 9 15 28 6 19 4 28 17 9 24 27 29 MIN. QNH PRESSURE IN HPA 1006.5 1011.6 1005.0 1012.1 1008.3 1005.4 1003.4 1006.7 1011.1 1015.7 1016.2 1012.8 1003.4 DAY 23 7 24 30 4 20 6 8 5 4 6 24 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 876.3 875.0 873.6 876.4 873.7 870.6 869.6 870.8 873.2 878.6 879.3 879.4 874.7 MAX. QFE PRESSURE IN HPA 883.3 882.6 878.0 884.2 877.6 875.0 874.2 874.7 875.8 883.8 883.1 886.4 886.4 DAY 9 15 28 6 18 15 28 17 9 11 29 29 MIN. QFE PRESSURE IN HPA 863.9 869.4 863.0 869.9 866.6 864.0 862.4 865.4 868.9 872.3 874.2 870.8 862.4 DAY 23 7 24 30 4 20 6 7 5 20 6 25 MEAN QNH PRESSURE IN HPA 1018.3 1016.9 1015.3 1018.4 1015.4 1011.8 1010.7 1012.1 1014.8 1021.0 1021.7 1021.8 1016.5 MAX. QNH PRESSURE IN HPA 1026.2 1025.4 1020.2 1027.2 1019.8 1016.8 1015.9 1016.5 1017.7 1026.8 1026.0 1029.7 1029.7 DAY 9 15 28 6 18 15 28 17 9 11 29 29 MIN. QNH PRESSURE IN HPA 1004.3 1010.5 1003.3 1011.1 1007.4 1004.4 1002.6 1006.0 1010.0 1013.8 1015.9 1012.1 1002.6 DAY 23 7 24 30 4 20 6 7 5 20 6 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 875.3 873.6 871.7 874.8 872.0 868.7 867.9 869.0 871.1 877.0 878.2 878.3 873.1 MAX. QFE PRESSURE IN HPA 882.0 881.4 876.8 882.4 877.0 873.6 872.3 873.5 873.6 882.2 882.1 885.1 885.1 DAY 9 16 27 6 18 16 28 17 9 11 23 29 MIN. QFE PRESSURE IN HPA 864.3 868.6 861.7 868.7 863.8 861.2 860.4 863.6 866.8 870.3 872.2 870.4 860.4 DAY 23 7 24 26 5 20 6 7 5 4 8 25 MEAN QNH PRESSURE IN HPA 1017.2 1015.2 1013.1 1016.6 1013.4 1009.7 1008.8 1010.1 1012.5 1019.1 1020.4 1020.6 1014.7 MAX. QNH PRESSURE IN HPA 1024.8 1024.1 1018.9 1025.2 1019.1 1015.3 1013.8 1015.1 1015.3 1025.0 1024.9 1028.3 1028.3 DAY 9 16 27 6 18 16 28 17 9 11 23 29 MIN. QNH PRESSURE IN HPA 1004.8 1009.6 1001.8 1009.7 1004.2 1001.3 1000.3 1004.0 1007.6 1011.5 1013.7 1011.6 1000.3 DAY 23 7 24 26 5 20 6 7 5 4 8 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 875.9 874.1 872.0 874.7 872.2 868.1 867.3 868.6 871.2 877.3 878.7 878.9 873.3 MAX. QFE PRESSURE IN HPA 883.0 881.3 877.1 881.6 877.7 872.8 872.4 872.9 873.6 882.4 883.2 885.8 885.8 DAY 9 16 26 6 18 15 28 17 2 12 23 29 MIN. QFE PRESSURE IN HPA 867.3 867.8 863.5 868.5 863.5 860.9 860.0 863.2 866.4 870.3 872.4 870.9 860.0 DAY 23 1 24 3 5 20 6 7 5 4 8 23 MEAN QNH PRESSURE IN HPA 1017.8 1015.8 1013.5 1016.6 1013.7 1009.1 1008.1 1009.6 1012.6 1019.4 1021.0 1021.3 1014.9 MAX. QNH PRESSURE IN HPA 1025.9 1024.0 1019.2 1024.3 1019.9 1014.4 1013.9 1014.5 1015.3 1025.2 1026.1 1029.0 1029.0 DAY 9 16 26 6 18 15 28 17 2 12 23 29 MIN. QNH PRESSURE IN HPA 1008.1 1008.7 1003.9 1009.5 1003.9 1000.9 999.9 1003.5 1007.1 1011.5 1013.9 1012.2 999.9 DAY 23 1 24 3 5 20 6 7 5 4 8 23 MEAN QFF PRESSURE IN HPA 1019.9 1016.7 1009.9 1010.5 1005.7 997.5 995.0 997.6 1002.1 1012.3 1019.1 1020.4 1008.9 MAX. QFF PRESSURE IN HPA 1032.5 1026.6 1020.1 1024.6 1013.3 1005.1 1002.7 1003.6 1005.5 1021.9 1024.7 1033.1 1033.1 DAY 13 16 26 6 14 9 28 17 28 23 27 31 MIN. QFF PRESSURE IN HPA 1009.2 1004.4 1000.4 999.4 996.7 987.6 985.7 988.8 995.1 1003.4 1010.4 1008.7 985.7 DAY 3 1 24 26 5 20 6 7 5 20 5 23 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 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1992-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.7 8.7 13.1 20.1 25.1 30.9 33.1 32.5 28.2 21.7 13.4 7.7 20.0 MINIMUN AIR TEMPERATURE (C) 0.6 2.5 6.7 13.1 17.5 22.7 25.4 24.5 20.5 14.8 7.6 2.5 13.2 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.0 0.4 4.9 22.7 29.8 29.1 15.4 0.8 0.0 0.0 103.1 DAYS WITH MINIMUM TEMP. <=-4 3.4 1.4 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.4 6.6 DAYS WITH FREEZING MIN.<= 0 13.2 7.6 1.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 7.1 31.1 TEMPERATURE RECORDS LOWEST(C) -10.6 -8.4 -5.2 1.2 5.8 13.0 18.2 15.8 10.5 6.6 -3.0 -10.2 -10.6 YEAR-DAY 96-16 97- 7 92-11 97-12 92- 2 95- 1 99-28 92-31 92-29 5-25 92-27 94- 7 96-16 MAXIMUM AIR TEMPERATURE (C) 9.5 13.1 17.6 24.7 29.9 35.7 38.0 37.4 33.1 26.3 17.6 11.5 24.5 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.0 3.8 16.8 29.1 31.0 30.6 24.6 5.6 0.0 0.0 141.5 DAYS WITH MAXIMUM TEMP. <= 0 1.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.1 TEMPERATURE RECORDS HIGHEST(C) 22.2 26.4 28.6 34.4 39.0 43.2 44.4 43.2 39.6 34.2 28.2 21.6 44.4 YEAR-DAY 2- 7 4-14 95-25 5-26 0-26 5-22 3-17 97-15 2-11 98- 1 1- 7 5- 4 3-17 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 10.6 10.9 11.6 12.4 13.0 12.6 12.9 12.6 11.5 10.0 9.0 11.3 MEAN DAILY TEMP. (MDT) (C) 5.1 7.8 12.2 18.9 23.7 29.2 31.7 31.0 26.8 20.5 12.6 7.0 18.9 STANDARD DEVIATION OF MDT(C) 2.09 1.82 2.34 1.56 1.65 0.67 1.45 1.19 1.49 1.78 1.80 1.99 1.65 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.7 21.9 99.6 245.8 331.6 309.0 174.4 36.6 0.2 0.0 1219.8 HEATING DEG. DAYS(BASE 18 0C) 401.2 288.4 185.8 35.8 4.6 0.0 0.0 0.0 0.0 14.7 165.0 341.8 1437.3 DEWPOINT (MEAN C) -4.6 -5.8 -4.0 -0.2 1.7 3.4 5.5 3.6 0.3 -0.7 -2.1 -2.9 -0.5 MIXING RATIO (G/KG) 3.27 3.04 3.57 4.64 5.25 5.95 6.94 6.08 4.71 4.37 3.99 3.74 4.63 VAPOUR PRESSURE (HPA) 4.58 4.25 4.97 6.47 7.31 8.23 9.57 8.41 6.57 6.12 5.59 5.25 6.44 SATURATION DEF. (HPA) 5.39 7.91 11.44 18.47 26.64 38.32 42.42 42.74 33.48 21.10 10.43 5.76 22.01 RELATIVE HUMIDITY (MEAN %) 51 40 35 30 24 20 20 18 18 25 38 51 30 RELATIVE HUMIDITY (MAX. %) 64 55 51 44 36 27 29 25 25 34 50 64 42 RELATIVE HUMIDITY (MIN. %) 40 29 25 21 17 14 14 13 13 19 30 41 23 RELATIVE HUMIDITY (MEAN% 03UTC) 61 53 48 42 35 27 28 24 24 33 48 61 40 RELATIVE HUMIDITY (MEAN% 09UTC) 46 35 31 26 21 18 18 16 16 22 35 46 28 RELATIVE HUMIDITY (MEAN% 15UTC) 50 36 32 27 21 16 15 14 15 24 38 52 28 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 20.4 15.2 24.5 14.7 11.9 0.8 0.5 1.2 0.1 2.1 7.8 16.6 115.8 DAYS WITH PRECIPITATION >=10 0.4 0.4 0.7 0.3 0.4 0.0 0.0 0.1 0.0 0.1 0.1 0.6 3.1 DAYS WITH PRECIPITATION >= 5 1.5 0.9 1.6 0.9 0.8 0.0 0.0 0.1 0.0 0.1 0.4 1.1 7.4 DAYS WITH PRECIPITATION >= 1 4.0 2.0 3.5 3.1 2.1 0.3 0.2 0.1 0.0 0.5 1.8 2.9 20.5 DAYS WITH PRECIPITATION 6.0 3.9 5.9 5.5 4.4 1.1 0.5 0.6 0.4 1.2 3.2 5.1 37.8 GREATEST DAILY PRECIPITATION 29.4 51.0 31.0 27.0 31.0 3.0 3.0 10.0 0.4 11.5 31.0 23.0 51.0 YEAR-DAY 5-12 96-22 99- 2 2-12 95-29 92-15 92- 9 98- 4 1-26 0- 4 0- 6 92- 4 96 DAY WITH THUNDER STORM 0.0 0.0 0.1 0.9 1.1 0.3 0.2 0.1 0.1 0.2 0.1 0.1 3.2 DAYS WITH SNOW OR SLEET 2.6 1.3 0.6 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.7 5.3 DAYS WITH DUST 0.6 1.0 2.4 3.3 3.5 3.0 3.5 0.7 1.9 1.1 1.2 0.9 23.1 WIND DIRECTION (PREVAILING) 180 180 180 180 360 45 45 45 45 180 180 180 45 PREVAILING WIND SPEED(KNOTS) 11.3 12.2 13.9 13.7 8.4 12.7 13.1 12.6 10.7 12.5 12.1 10.2 11.1 PREVAILING WIND PERCENT 16.5 15.8 15.9 14.8 16.8 26.8 37.3 38.1 25.8 19.2 16.6 14.2 17.7 CALMS PERCENT OF WIND 55.2 44.7 38.0 27.6 25.5 20.5 19.4 18.7 26.6 38.3 52.9 61.1 35.7 NO. OF WIND OBSERVATION 155.0 141.4 155.0 150.0 155.0 150.0 161.6 161.6 156.4 161.6 156.4 154.8 1858.8 VECTOR WIND DIRECTION (MEAN) 193 215 219 256 331 32 48 57 56 143 192 191 57 VECTOR WIND MAGNITUDE(KNOTS) 1.2 1.2 1.2 1.2 1.1 3.5 6.1 5.6 2.4 0.8 1.2 0.9 1.0 WIND STEADINESES (MEAN %) 29.3 20.7 17.6 14.8 13.1 38.5 64.2 58.9 31.6 12.9 26.1 27.3 14.5 WIND SPEED (MEAN KNOTS) 4.1 5.8 6.8 8.1 8.4 9.1 9.5 9.5 7.6 6.2 4.6 3.3 6.9 FASTEST WIND DIRECTION 170 210 190 210 190 60 90 100 60 70 210 210 210 FASTEST WIND SPEED (KNOTS) 47 39 47 54 43 39 39 39 31 37 43 51 54 YEAR-DAY 94- 4 92-21 3-19 5- 3 1-11 98-13 92-20 94-27 0-10 96- 1 93-12 94-20 5 DAYS WITH SKY CLEAR (0-2)/8 15.4 16.1 14.6 13.1 17.8 25.8 25.1 27.5 27.8 24.4 15.4 15.3 238.3 DAYS WITH P.CLOUDY (3-6)/8 9.4 8.3 10.4 11.7 10.7 3.9 5.9 3.5 2.2 5.9 10.3 10.2 92.4 DAYS WITH CLOUDY (7-8)/8 6.2 3.9 6.0 5.2 2.5 0.4 0.0 0.0 0.0 0.7 4.3 5.5 34.7 DAYS WITH VISIBILITY =< 2 KM 2.9 1.1 0.6 0.3 0.3 0.2 0.1 0.1 0.5 0.2 0.6 2.4 9.3 DURATION OF SUNSHINE HOURS 198.6 213.6 234.9 245.3 312.5 362.1 354.5 357.0 300.4 277.4 209.7 187.7 3253.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1992-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 876.7 875.1 874.0 873.9 873.2 870.0 868.6 870.6 873.8 878.0 878.6 878.9 874.3 MAX. QFE PRESSURE IN HPA 889.1 888.5 887.3 886.0 882.8 879.2 878.6 879.8 885.7 886.8 890.9 889.4 890.9 YEAR-DAY 99- 2 98-23 2-11 94- 5 3- 2 93-23 98-20 96-29 94-23 95-25 96-18 3-12 96-18 MIN. QFE PRESSURE IN HPA 861.4 860.3 859.9 860.4 859.8 860.0 860.0 862.2 863.1 868.6 864.8 863.2 859.8 YEAR-DAY 3-28 3-20 3-26 2- 3 4-13 99-24 97-11 0-31 0- 1 96-27 1-18 94- 3 4-13 MEAN QNH PRESSURE IN HPA 1018.8 1017.0 1015.8 1015.6 1014.9 1011.2 1009.6 1011.9 1015.5 1020.2 1020.9 1021.3 1016.0 MAX. QNH PRESSURE IN HPA 1032.8 1032.1 1030.7 1029.3 1025.7 1021.6 1020.9 1022.3 1028.9 1030.2 1034.8 1033.1 1034.8 YEAR-DAY 99- 2 98-23 2-11 94- 5 3- 2 93-23 98-20 96-29 94-23 95-25 96-18 3-12 96-18 MIN. QNH PRESSURE IN HPA 1001.5 1000.2 999.8 1000.3 999.7 999.9 999.9 1002.4 1003.4 1009.6 1005.3 1003.5 999.7 YEAR-DAY 3-28 3-20 3-26 2- 3 4-13 99-24 97-11 0-31 0- 1 96-27 1-18 94- 3 4-13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.9 1001.4 1004.4 1017.2 1018.4 ****** 1008.1 MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1006.2 1008.5 1013.9 1024.5 1028.9 ****** 1028.9 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-25 93-23 93-17 93-30 **-** 93-30 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 991.2 992.7 995.7 1004.8 1002.6 ****** 991.2 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-12 93- 3 93- 2 93-14 **-** 93-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 869.9 871.6 873.0 880.0 877.5 ****** 874.4 MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 874.4 875.3 877.8 884.6 883.3 ****** 884.6 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-31 93-16 93-17 93-21 **-** 93-17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 865.1 866.3 869.5 873.8 867.9 ****** 865.1 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-13 93-14 93- 3 93-14 **-** 93-12 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1011.1 1013.0 1014.6 1022.5 1019.6 ****** 1016.2 MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1016.2 1017.2 1020.0 1027.7 1026.2 ****** 1027.7 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-31 93-16 93-17 93-21 **-** 93-17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1005.7 1007.0 1010.6 1015.5 1008.8 ****** 1005.7 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-13 93-14 93- 3 93-14 **-** 93-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.8 1001.1 1003.8 1016.7 1017.5 ****** 1007.6 MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.2 1006.8 1010.2 1022.6 1027.7 ****** 1027.7 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-25 93-17 93- 8 93-30 **-** 93-30 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 992.6 994.5 998.0 1006.4 1002.6 ****** 992.6 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-12 93- 4 93- 3 93-14 **-** 93-12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 876.8 875.3 874.4 874.5 874.2 871.1 869.5 871.4 874.5 878.4 878.8 879.0 874.8 MAX. QFE PRESSURE IN HPA 886.8 887.1 885.8 884.0 882.0 879.0 878.1 879.5 884.6 885.7 889.8 888.5 889.8 YEAR-DAY 99- 2 98-23 2-11 5- 6 3- 2 93-23 98-20 96-30 94-23 95-27 96-19 3-12 96-19 MIN. QFE PRESSURE IN HPA 863.0 863.3 864.2 862.5 863.5 861.6 861.8 864.2 865.2 870.3 867.0 864.2 861.6 YEAR-DAY 98-13 3-19 1-25 4-17 4-13 99-25 97-16 94- 1 0- 1 96-27 93-14 94- 4 99-25 MEAN QNH PRESSURE IN HPA 1018.9 1017.2 1016.2 1016.3 1015.9 1012.4 1010.7 1012.8 1016.2 1020.7 1021.2 1021.4 1016.6 MAX. QNH PRESSURE IN HPA 1030.2 1030.5 1029.0 1027.0 1024.8 1021.4 1020.3 1021.9 1027.7 1028.9 1033.6 1032.1 1033.6 YEAR-DAY 99- 2 98-23 2-11 5- 6 3- 2 93-23 98-20 96-30 94-23 95-27 96-19 3-12 96-19 MIN. QNH PRESSURE IN HPA 1003.3 1003.6 1004.6 1002.7 1003.9 1001.7 1001.9 1004.6 1005.8 1011.5 1007.8 1004.6 1001.7 YEAR-DAY 98-13 3-19 1-25 4-17 4-13 99-25 97-16 94- 1 0- 1 96-27 93-14 94- 4 99-25 MEAN QFF PRESSURE IN HPA 1020.2 1017.0 1013.8 1010.3 1007.3 1001.0 998.1 1000.7 1006.4 1014.2 1018.9 1022.0 1010.8 MAX. QFF PRESSURE IN HPA 1034.3 1034.0 1029.2 1026.4 1019.9 1013.2 1009.2 1012.0 1022.1 1026.0 1034.8 1038.1 1038.1 YEAR-DAY 99- 3 98-23 3- 3 5- 6 3- 2 95- 1 0-31 96-30 94-23 95-27 96-19 3-12 3-12 MIN. QFF PRESSURE IN HPA 1003.4 1001.2 998.1 995.6 993.9 989.0 987.6 990.2 994.2 1003.7 1003.0 1001.5 987.6 YEAR-DAY 97-16 98- 8 1-25 4-17 4-13 99-25 97-16 94- 1 0- 1 98- 1 93-14 94- 4 97-16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1992-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 877.8 876.4 875.4 875.3 874.7 871.6 870.1 872.2 875.4 879.5 879.8 880.0 875.7 MAX. QFE PRESSURE IN HPA 889.1 888.5 887.3 886.0 882.8 879.2 878.6 879.8 885.7 886.8 890.9 889.4 890.9 YEAR-DAY 99- 2 98-23 2-11 94- 5 3- 2 93-23 98-20 96-29 94-23 95-25 96-18 3-12 96-18 MIN. QFE PRESSURE IN HPA 863.5 863.4 864.1 863.3 863.4 862.4 863.1 864.7 866.6 871.7 868.5 864.9 862.4 YEAR-DAY 98-13 3-19 97-25 4-17 4-13 99-25 97-16 94- 1 0- 1 96-27 1-18 94- 4 99-25 MEAN QNH PRESSURE IN HPA 1020.0 1018.5 1017.3 1017.1 1016.5 1013.0 1011.4 1013.7 1017.3 1021.9 1022.3 1022.5 1017.6 MAX. QNH PRESSURE IN HPA 1032.8 1032.1 1030.7 1029.3 1025.7 1021.6 1020.9 1022.3 1028.9 1030.2 1034.8 1033.1 1034.8 YEAR-DAY 99- 2 98-23 2-11 94- 5 3- 2 93-23 98-20 96-29 94-23 95-25 96-18 3-12 96-18 MIN. QNH PRESSURE IN HPA 1003.9 1003.7 1004.5 1003.6 1003.7 1002.6 1003.4 1005.2 1007.4 1013.1 1009.5 1005.4 1002.6 YEAR-DAY 98-13 3-19 97-25 4-17 4-13 99-25 97-16 94- 1 0- 1 96-27 1-18 94- 4 99-25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1000.7 1003.3 1006.5 1019.0 1019.7 ****** 1009.8 MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1006.2 1008.2 1013.9 1024.5 1028.9 ****** 1028.9 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-24 93-23 93-17 93-30 **-** 93-30 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 995.8 996.1 999.4 1008.7 1006.7 ****** 995.8 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-12 93- 3 93- 1 93-11 **-** 93-12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 876.9 875.6 874.5 874.3 873.6 870.5 869.2 871.2 874.3 878.3 878.7 879.0 874.7 MAX. QFE PRESSURE IN HPA 888.7 887.2 886.5 885.6 881.9 878.3 877.2 878.4 884.7 885.7 890.1 888.5 890.1 YEAR-DAY 99- 2 98-23 2-11 94- 5 3- 2 93-23 0-30 96-29 94-23 95-25 96-18 3-12 96-18 MIN. QFE PRESSURE IN HPA 863.3 863.0 861.9 864.0 862.2 861.5 862.4 863.9 865.4 870.2 867.1 864.6 861.5 YEAR-DAY 98-13 3-19 97-29 2- 3 4-13 99-25 5- 6 94- 1 0- 1 96-27 1-18 94- 4 99-25 MEAN QNH PRESSURE IN HPA 1019.0 1017.5 1016.3 1016.0 1015.3 1011.7 1010.3 1012.5 1016.0 1020.6 1021.0 1021.3 1016.5 MAX. QNH PRESSURE IN HPA 1032.3 1030.6 1029.8 1028.8 1024.6 1020.6 1019.3 1020.7 1027.8 1028.9 1033.9 1032.1 1033.9 YEAR-DAY 99- 2 98-23 2-11 94- 5 3- 2 93-23 0-30 96-29 94-23 95-25 96-18 3-12 96-18 MIN. QNH PRESSURE IN HPA 1003.6 1003.3 1002.0 1004.4 1002.4 1001.6 1002.6 1004.3 1006.0 1011.4 1007.9 1005.1 1001.6 YEAR-DAY 98-13 3-19 97-29 2- 3 4-13 99-25 5- 6 94- 1 0- 1 96-27 1-18 94- 4 99-25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 999.4 1001.8 1004.7 1017.3 1018.1 ****** 1008.3 MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1005.9 1006.5 1011.9 1022.8 1028.9 ****** 1028.9 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-24 93-23 93-17 93-30 **-** 93-30 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 994.1 995.2 997.9 1007.0 1003.7 ****** 994.1 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-12 93- 3 93- 1 93-11 **-** 93-12 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 875.8 874.0 872.8 872.7 871.9 868.6 867.4 869.4 872.4 876.8 877.6 878.0 873.1 MAX. QFE PRESSURE IN HPA 887.3 885.7 883.9 883.8 880.3 876.6 876.2 876.8 883.0 884.6 889.0 886.8 889.0 YEAR-DAY 99- 2 98-23 3- 2 94- 5 3- 2 93-22 0-30 96-29 94-23 95-25 96-18 4- 3 96-18 MIN. QFE PRESSURE IN HPA 861.4 860.3 859.9 860.4 859.8 860.7 860.4 862.2 863.1 868.6 864.8 863.7 859.8 YEAR-DAY 3-28 3-20 3-26 2- 3 4-13 99-25 5- 6 0-31 0- 1 96-27 1-18 94- 4 4-13 MEAN QNH PRESSURE IN HPA 1017.7 1015.7 1014.4 1014.2 1013.4 1009.6 1008.3 1010.5 1014.0 1018.9 1019.8 1020.2 1014.7 MAX. QNH PRESSURE IN HPA 1030.7 1028.9 1026.9 1026.8 1022.8 1018.7 1018.2 1018.9 1025.9 1027.7 1032.7 1030.2 1032.7 YEAR-DAY 99- 2 98-23 3- 2 94- 5 3- 2 93-22 0-30 96-29 94-23 95-25 96-18 4- 3 96-18 MIN. QNH PRESSURE IN HPA 1001.5 1000.2 999.8 1000.3 999.7 1000.7 1000.3 1002.4 1003.4 1009.6 1005.3 1004.1 999.7 YEAR-DAY 3-28 3-20 3-26 2- 3 4-13 99-25 5- 6 0-31 0- 1 96-27 1-18 94- 4 4-13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 997.7 999.9 1002.8 1015.6 1017.3 ****** 1006.6 MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.5 1005.0 1010.2 1021.4 1026.5 ****** 1026.5 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-25 93-23 93- 8 93-30 **-** 93-30 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 991.2 992.7 995.7 1004.8 1003.8 ****** 991.2 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-12 93- 3 93- 2 93-13 **-** 93-12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1992-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 876.3 874.4 873.0 872.7 871.9 868.1 866.9 869.0 872.4 877.1 878.2 878.6 873.2 MAX. QFE PRESSURE IN HPA 887.6 885.5 884.0 883.5 880.2 876.1 875.8 876.2 883.2 884.9 888.8 887.9 888.8 YEAR-DAY 99- 2 98-23 2-10 94- 5 3- 2 93-22 0-30 96-29 94-23 95-25 96-18 3-11 96-18 MIN. QFE PRESSURE IN HPA 863.2 861.0 861.3 863.4 860.0 860.0 860.0 862.4 863.4 869.6 865.3 863.2 860.0 YEAR-DAY 3-28 3-20 97-29 2- 3 4-13 99-24 97-11 94- 2 0- 1 96-27 1-18 94- 3 97-11 MEAN QNH PRESSURE IN HPA 1018.4 1016.2 1014.6 1014.3 1013.3 1009.1 1007.6 1010.1 1013.9 1019.2 1020.4 1021.0 1014.8 MAX. QNH PRESSURE IN HPA 1031.1 1028.7 1027.0 1026.4 1022.7 1018.1 1017.7 1018.2 1026.1 1028.0 1032.4 1031.4 1032.4 YEAR-DAY 99- 2 98-23 2-10 94- 5 3- 2 93-22 0-30 96-29 94-23 95-25 96-18 3-11 96-18 MIN. QNH PRESSURE IN HPA 1003.5 1001.0 1001.4 1003.7 999.9 999.9 999.9 1002.6 1003.7 1010.7 1005.9 1003.5 999.9 YEAR-DAY 3-28 3-20 97-29 2- 3 4-13 99-24 97-11 94- 2 0- 1 96-27 1-18 94- 3 97-11 MEAN QFF PRESSURE IN HPA 1019.7 1016.0 1012.1 1008.3 1004.6 997.5 995.1 998.0 1004.0 1012.7 1018.2 1021.5 1009.0 MAX. QFF PRESSURE IN HPA 1034.8 1031.0 1030.1 1025.6 1017.9 1009.3 1006.4 1008.2 1020.2 1024.4 1033.5 1035.6 1035.6 YEAR-DAY 99- 2 98-23 3- 2 94- 5 3- 2 95- 1 0-30 96-30 94-23 95-25 96-18 94- 7 94- 7 MIN. QFF PRESSURE IN HPA 1003.5 996.6 996.7 998.4 989.6 987.2 985.2 987.8 992.5 1001.2 1001.2 1000.7 985.2 YEAR-DAY 97-16 3-20 3-26 1-26 99-20 0-24 95-16 97- 6 0- 1 98- 1 1-18 94- 3 95-16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 869.7 871.6 873.3 880.3 878.0 ****** 874.6 MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 874.9 875.8 877.8 885.0 883.7 ****** 885.0 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-30 93-23 93-17 93-21 **-** 93-17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 865.2 866.1 868.6 873.8 867.7 ****** 865.2 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-12 93- 3 93- 2 93-13 **-** 93-12 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1010.8 1013.0 1014.9 1022.9 1020.2 ****** 1016.4 MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1016.7 1017.7 1020.0 1028.1 1026.7 ****** 1028.1 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-30 93-23 93-17 93-21 **-** 93-17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1005.8 1006.8 1009.6 1015.5 1008.6 ****** 1005.8 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-12 93- 3 93- 2 93-13 **-** 93-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.6 1001.2 1004.4 1017.4 1018.7 ****** 1008.1 MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.7 1006.2 1010.9 1023.1 1027.0 ****** 1027.0 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-24 93-23 93-17 93-29 **-** 93-29 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 993.7 994.0 997.1 1005.7 1004.1 ****** 993.7 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-12 93- 3 93- 2 93-10 **-** 93-12 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 869.9 871.6 873.2 880.2 877.9 ****** 874.6 MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 874.3 876.0 877.5 884.8 883.6 ****** 884.8 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-30 93-15 93-16 93-21 **-** 93-16 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 865.2 866.0 868.6 874.0 867.2 ****** 865.2 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-12 93- 3 93- 2 93-13 **-** 93-12 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1011.1 1013.1 1014.8 1022.7 1020.1 ****** 1016.4 MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1016.1 1018.0 1019.7 1027.9 1026.6 ****** 1027.9 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-30 93-15 93-16 93-21 **-** 93-16 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1005.8 1006.7 1009.6 1015.7 1008.0 ****** 1005.8 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-12 93-12 93- 3 93- 2 93-13 **-** 93-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.7 1001.0 1004.0 1017.0 1018.3 ****** 1007.8 MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.2 1006.6 1010.4 1022.6 1027.9 ****** 1027.9 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-26 93-24 93-16 93- 8 93-29 **-** 93-29 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 993.2 994.3 996.7 1006.8 1003.2 ****** 993.2 YEAR-DAY **-** **-** **-** **-** **-** **-** 93- 3 93-12 93- 3 93- 2 93-13 **-** 93- 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 1 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 1.6 6.3 8.3 18.0 20.6 29.6 33.9 29.5 26.3 20.6 14.7 6.1 18.0 1993 2.9 6.9 11.0 19.4 24.2 30.8 30.7 30.0 27.6 17.6 9.9 8.4 18.3 1994 7.6 8.1 14.1 20.6 25.1 30.8 33.9 33.6 24.8 19.5 15.3 5.4 19.9 1995 8.8 9.6 14.1 19.2 23.9 29.5 34.7 34.4 28.0 20.2 15.1 5.1 20.2 1996 2.7 8.5 9.9 18.4 25.3 30.7 31.4 32.3 30.1 20.7 12.1 9.8 19.3 1997 8.4 7.4 10.7 19.6 24.8 30.6 35.1 33.9 27.9 23.5 12.5 7.8 20.2 1998 4.3 7.0 13.1 21.1 25.2 31.5 33.3 32.5 28.7 21.4 17.5 11.3 20.6 1999 5.6 11.8 12.7 20.1 27.3 32.6 31.6 32.8 28.4 23.3 12.5 8.4 20.6 2000 6.3 8.1 13.7 23.7 28.9 31.4 32.5 32.4 29.1 19.8 10.9 7.1 20.3 2001 5.2 9.2 16.1 23.2 27.1 31.5 32.1 32.8 28.3 22.5 14.0 9.6 21.0 2002 6.6 11.2 15.8 18.9 26.0 30.8 32.5 33.5 30.5 24.7 13.4 5.9 20.8 2003 7.6 9.1 13.0 20.1 24.0 30.6 35.3 31.9 27.7 24.5 12.2 6.4 20.2 2004 7.0 11.5 16.0 18.2 25.2 31.5 32.0 33.6 28.0 22.1 14.7 5.3 20.4 2005 4.9 6.7 15.3 20.5 24.4 31.1 34.2 32.2 29.5 23.3 12.4 10.5 20.4 MEAN 5.7 8.7 13.1 20.1 25.1 30.9 33.1 32.5 28.2 21.7 13.4 7.7 20.0 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 2 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 -3.0 0.2 1.9 10.4 14.4 21.5 25.8 21.9 18.1 13.2 8.6 1.7 11.2 1993 -1.3 1.3 4.8 12.8 16.9 22.3 24.2 23.0 21.3 12.2 5.2 2.3 12.1 1994 2.0 1.3 7.8 13.5 17.1 22.1 25.7 25.2 17.2 13.6 9.4 -0.8 12.8 1995 2.1 3.7 7.4 13.0 17.1 21.9 27.0 25.7 20.4 13.2 8.3 0.5 13.4 1996 -1.7 3.5 5.0 11.5 17.7 22.4 23.9 24.2 21.8 13.1 6.1 3.8 12.6 1997 2.6 -0.3 4.4 12.3 17.3 23.5 27.4 25.2 19.9 16.6 7.4 3.0 13.3 1998 -1.1 1.5 7.1 13.7 17.5 22.6 25.4 24.7 21.1 14.2 10.8 5.2 13.6 1999 1.4 5.7 7.1 13.0 18.7 23.5 23.9 24.3 20.6 16.1 6.8 2.7 13.6 2000 0.3 1.3 6.2 15.6 19.9 22.5 23.8 23.8 21.6 13.4 6.1 2.7 13.1 2001 0.2 2.6 9.3 15.4 18.9 23.4 24.4 24.5 20.5 15.5 7.7 4.8 13.9 2002 1.6 4.9 8.6 12.9 18.6 22.5 24.7 25.9 22.5 17.7 8.5 0.8 14.1 2003 2.5 2.7 6.3 13.8 16.4 23.1 28.2 24.0 19.7 17.7 6.5 2.1 13.6 2004 2.7 4.9 9.9 11.7 17.7 23.6 24.6 25.8 20.3 15.3 8.9 0.6 13.8 2005 -0.2 1.3 8.2 13.6 16.9 23.1 26.9 24.7 21.4 15.7 6.8 5.0 13.6 MEAN 0.6 2.5 6.7 13.1 17.5 22.7 25.4 24.5 20.5 14.8 7.6 2.5 13.2 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 3 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF MAXIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 5.2 10.8 12.7 22.7 25.3 34.3 38.5 34.1 30.9 25.1 19.1 9.4 22.3 1993 6.1 11.1 15.3 23.7 28.7 35.6 36.8 36.3 34.1 23.7 15.5 12.5 23.3 1994 11.5 13.0 18.7 25.2 29.5 35.6 38.7 38.5 29.3 23.6 19.6 9.7 24.4 1995 13.0 13.7 18.6 23.4 28.3 34.3 39.5 39.1 32.9 24.8 19.9 8.4 24.7 1996 6.2 12.6 13.5 23.4 29.6 35.4 35.7 36.7 34.6 25.4 15.9 13.7 23.6 1997 12.3 12.2 15.2 24.2 29.5 35.2 40.0 38.8 32.6 27.6 16.3 11.3 24.6 1998 8.1 11.7 17.7 25.9 30.1 36.0 38.0 37.2 33.4 26.0 22.1 15.9 25.2 1999 9.3 16.7 16.8 24.9 32.2 37.4 36.3 37.3 33.3 27.6 16.6 12.6 25.1 2000 11.0 12.6 18.5 28.6 33.7 36.2 37.2 37.2 33.9 24.2 14.2 10.5 24.8 2001 8.8 13.6 21.0 28.1 32.2 36.3 37.1 37.8 33.1 27.5 18.8 13.4 25.6 2002 10.5 15.6 20.9 23.4 30.6 35.5 37.6 38.6 35.4 29.2 16.9 10.0 25.4 2003 11.6 13.9 17.8 24.6 28.7 35.8 40.7 36.9 32.7 28.5 16.2 10.0 24.8 2004 10.8 16.0 20.1 22.6 30.3 36.0 36.7 38.6 32.6 26.4 18.9 8.9 24.8 2005 9.2 10.5 19.9 25.1 29.2 35.8 39.0 37.0 34.3 27.7 16.3 14.4 24.9 MEAN 9.5 13.1 17.6 24.7 29.9 35.7 38.0 37.4 33.1 26.3 17.6 11.5 24.5 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 4 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 8.2 10.6 10.8 12.3 10.9 12.8 12.7 12.2 12.8 11.9 10.5 7.7 11.1 1993 7.4 9.8 10.5 10.9 11.8 13.3 12.6 13.3 12.8 11.5 10.3 10.2 11.2 1994 9.5 11.7 10.9 11.7 12.4 13.5 13.0 13.3 12.1 10.0 10.2 10.5 11.6 1995 10.9 10.0 11.2 10.4 11.2 12.4 12.5 13.4 12.5 11.6 11.6 7.9 11.3 1996 7.9 9.1 8.5 11.9 11.9 13.0 11.8 12.5 12.8 12.3 9.8 9.9 11.0 1997 9.7 12.5 10.8 11.9 12.2 11.7 12.6 13.6 12.7 11.0 8.9 8.3 11.3 1998 9.2 10.2 10.6 12.2 12.6 13.4 12.6 12.5 12.3 11.8 11.3 10.7 11.6 1999 7.9 11.0 9.7 11.9 13.5 13.9 12.4 13.0 12.7 11.5 9.8 9.9 11.5 2000 10.7 11.3 12.3 13.0 13.8 13.7 13.4 13.4 12.3 10.8 8.1 7.8 11.7 2001 8.6 11.0 11.7 12.7 13.3 12.9 12.7 13.3 12.6 12.0 11.1 8.6 11.7 2002 8.9 10.7 12.3 10.5 12.0 13.0 12.9 12.7 12.9 11.5 8.4 9.2 11.3 2003 9.1 11.2 11.5 10.8 12.3 12.7 12.5 12.9 13.0 10.8 9.7 7.9 11.2 2004 8.1 11.1 10.2 10.9 12.6 12.4 12.1 12.8 12.3 11.1 10.0 8.3 11.0 2005 9.4 9.2 11.7 11.5 12.3 12.7 12.1 12.3 12.9 12.0 9.5 9.4 11.3 MEAN 8.9 10.6 10.9 11.6 12.4 13.0 12.6 12.9 12.6 11.5 10.0 9.0 11.3 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 5 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF MEAN DAILY TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 1.1 5.5 7.3 16.6 19.8 27.9 32.1 28.0 24.5 19.1 13.8 5.6 16.8 1993 2.4 6.2 10.1 18.3 22.8 28.9 30.5 29.7 27.7 17.9 10.3 7.4 17.7 1994 6.8 7.2 13.2 19.3 23.3 28.8 32.2 31.8 23.2 18.6 14.5 4.5 18.6 1995 7.5 8.7 13.0 18.2 22.7 28.1 33.3 32.4 26.7 19.0 14.1 4.5 19.0 1996 2.2 8.0 9.2 17.4 23.7 28.9 29.8 30.4 28.2 19.3 11.0 8.7 18.1 1997 7.4 6.0 9.8 18.3 23.4 29.3 33.7 32.0 26.3 22.1 11.8 7.2 18.9 1998 3.5 6.6 12.4 19.8 23.8 29.3 31.7 30.9 27.2 20.1 16.5 10.6 19.4 1999 5.3 11.2 11.9 18.9 25.5 30.5 30.1 30.8 26.9 21.9 11.7 7.6 19.4 2000 5.6 7.0 12.4 22.1 26.8 29.4 30.5 30.5 27.8 18.8 10.2 6.6 19.0 2001 4.5 8.1 15.2 21.7 25.5 29.9 30.7 31.2 26.8 21.5 13.2 9.1 19.8 2002 6.0 10.2 14.7 18.2 24.6 29.0 31.1 32.3 29.0 23.4 12.7 5.4 19.7 2003 7.1 8.3 12.0 19.2 22.6 29.5 34.5 30.5 26.2 23.1 11.3 6.1 19.2 2004 6.7 10.4 15.0 17.2 24.0 29.8 30.6 32.2 26.4 20.8 13.9 4.8 19.3 2005 4.5 5.9 14.0 19.4 23.1 29.4 32.9 30.9 27.9 21.7 11.6 9.7 19.2 MEAN 5.1 7.8 12.2 18.9 23.7 29.2 31.7 31.0 26.8 20.5 12.6 7.0 18.9 SD 2.09 1.82 2.34 1.56 1.65 0.67 1.45 1.19 1.49 1.78 1.80 1.99 1.65 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 6 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M TEMPERATURE RECORDS LOWEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 -10.0 -5.4 -5.2 4.0 5.8 17.0 20.8 15.8 10.5 9.8 -3.0 -6.2 -10.0 DAY 26 13 11 3 2 9 27 31 29 16 27 29 1993 -5.0 -4.8 -1.0 9.5 9.6 18.0 20.8 17.6 15.0 7.0 -2.8 -4.2 -5.0 DAY 9 17 23 14 8 6 19 4 28 9 30 1 1994 -2.2 -5.2 3.5 4.2 12.2 16.0 21.6 21.4 11.6 10.2 2.8 -10.2 -10.2 DAY 20 4 15 5 7 5 1 26 21 9 27 7 1995 -2.2 -0.4 0.8 7.2 12.2 13.0 22.5 21.0 12.6 8.0 -1.8 -2.2 -2.2 DAY 24 16 6 7 9 1 1 10 22 18 30 22 1996 -10.6 -5.0 -1.0 3.4 13.4 18.0 20.5 19.8 18.0 9.2 0.8 -0.6 -10.6 DAY 16 6 1 6 2 28 16 4 24 19 13 3 1997 -6.4 -8.4 -4.0 1.2 9.4 19.0 22.0 21.0 14.0 11.2 3.8 -2.9 -8.4 DAY 29 7 9 12 6 20 1 29 15 25 28 30 1998 -5.4 -4.6 -4.8 6.2 9.2 19.0 21.4 19.4 17.2 7.0 6.8 1.4 -5.4 DAY 10 12 2 7 3 6 25 4 13 12 26 6 1999 -5.0 0.2 1.0 7.8 13.6 20.2 18.2 21.6 15.0 8.4 -2.6 -2.4 -5.0 DAY 3 22 19 11 22 17 28 21 28 27 30 1 2000 -6.2 -6.6 -1.8 9.2 15.4 14.4 19.8 20.0 16.2 8.0 2.6 0.0 -6.6 DAY 18 8 4 1 13 14 27 20 26 5 19 31 2001 -9.8 -2.0 1.6 10.4 12.6 15.6 20.4 19.5 14.2 9.4 -2.6 0.0 -9.8 DAY 28 1 12 10 4 13 18 17 22 28 20 23 2002 -3.0 -0.4 2.4 6.2 11.6 17.4 21.8 21.8 18.4 12.8 2.2 -4.4 -4.4 DAY 15 18 8 4 5 9 9 14 26 23 30 23 2003 -7.2 -5.0 -1.4 5.4 10.2 16.0 23.2 19.2 13.6 14.2 0.4 -5.4 -7.2 DAY 20 18 2 18 1 7 1 31 28 31 25 12 2004 -1.6 -0.8 0.4 4.0 12.4 19.0 19.4 22.2 15.0 11.4 -0.8 -3.0 -3.0 DAY 1 24 15 2 6 1 13 27 30 28 29 29 2005 -7.8 -8.0 1.2 3.0 10.2 18.0 22.4 18.8 17.0 6.6 2.6 -4.4 -8.0 DAY 13 11 27 6 7 10 28 31 29 25 12 31 1992-2005 -10.6 -8.4 -5.2 1.2 5.8 13.0 18.2 15.8 10.5 6.6 -3.0 -10.2 -10.6 YEAR-DAY 96-16 97- 7 92-11 97-12 92- 2 95- 1 99-28 92-31 92-29 5-25 92-27 94- 7 96 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 7 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M TEMPERATURE RECORDS HIGHEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 13.6 21.8 23.5 30.0 33.5 40.0 43.0 38.8 36.0 28.7 24.4 17.6 43.0 DAY 1 24 30 13 31 30 5 26 25 4 7 17 1993 17.6 22.0 23.2 31.8 34.4 39.4 40.2 40.2 38.6 33.0 24.5 16.6 40.2 DAY 29 28 31 20 27 18 3 14 3 1 1 29 1994 19.4 19.4 24.5 33.4 34.0 39.0 42.6 41.4 33.8 29.0 24.4 20.6 42.6 DAY 4 28 31 25 30 16 30 5 1 1 8 20 1995 20.0 19.8 28.6 29.5 34.5 40.6 43.5 41.6 36.4 33.8 26.7 13.6 43.5 DAY 17 8 25 3 7 22 16 6 9 4 11 1 1996 16.6 24.0 23.8 29.8 37.0 40.2 39.0 40.2 38.6 31.4 22.0 21.5 40.2 DAY 6 10 31 22 31 4 7 23 8 14 3 28 1997 18.5 22.2 21.2 31.0 35.2 40.6 43.4 43.2 38.8 34.0 24.6 18.2 43.4 DAY 10 22 23 27 28 16 18 15 2 3 5 10 1998 14.6 22.6 26.0 32.5 36.8 39.6 42.5 41.4 38.4 34.2 26.0 20.8 42.5 DAY 30 8 29 17 29 28 11 20 3 1 9 14 1999 12.8 21.4 25.0 29.0 38.4 41.2 42.6 39.4 37.6 32.8 24.0 17.6 42.6 DAY 11 20 31 8 31 28 4 30 11 11 26 29 2000 19.4 19.0 27.0 33.6 39.0 42.6 41.6 41.0 38.4 30.4 22.6 14.8 42.6 DAY 6 24 24 15 26 24 11 31 8 25 3 22 2001 16.2 19.8 28.6 32.0 38.8 41.8 44.2 41.2 37.6 33.2 28.2 20.6 44.2 DAY 15 28 31 4 17 29 9 24 5 1 7 20 2002 22.2 24.0 27.8 32.6 38.0 40.2 42.4 42.6 39.6 33.2 26.8 16.4 42.6 DAY 7 25 27 28 29 6 16 7 11 5 12 8 2003 20.4 21.8 25.6 32.4 33.4 42.6 44.4 40.4 36.8 33.4 24.6 20.0 44.4 DAY 15 20 19 7 22 23 17 6 7 3 11 19 2004 16.6 26.4 28.6 30.6 34.4 39.6 40.6 42.2 38.2 31.4 24.6 17.0 42.2 DAY 24 14 7 22 20 25 30 4 3 11 1 31 2005 19.0 21.6 25.5 34.4 32.6 43.2 44.0 42.4 38.6 32.0 25.4 21.6 44.0 DAY 1 21 30 26 28 22 18 7 12 8 5 4 1992-2005 22.2 26.4 28.6 34.4 39.0 43.2 44.4 43.2 39.6 34.2 28.2 21.6 44.4 YEAR-DAY 2- 7 4-14 95-25 5-26 0-26 5-22 3-17 97-15 2-11 98- 1 1- 7 5- 4 3 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 8 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M 0C COOLING DEGREE DAYS (BASE 21) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 0.0 0.0 0.0 1.8 40.5 206.9 344.6 217.2 109.6 7.4 0.0 0.0 928.1 1993 0.0 0.0 0.0 11.7 79.6 237.9 294.6 269.1 200.2 11.5 0.0 0.0 1104.7 1994 0.0 0.0 0.0 25.3 83.6 235.0 346.8 335.6 75.1 4.7 0.0 0.0 1106.2 1995 0.0 0.0 1.0 7.7 75.1 213.9 380.0 353.3 171.3 29.1 0.7 0.0 1232.2 1996 0.0 0.0 0.0 8.6 91.4 237.1 272.4 292.7 216.7 10.3 0.0 0.0 1129.3 1997 0.0 0.0 0.0 12.5 88.9 249.8 393.8 341.2 159.1 57.2 0.0 0.0 1302.7 1998 0.0 0.0 0.0 31.9 107.3 248.9 330.3 307.9 187.2 40.3 0.0 0.0 1253.9 1999 0.0 0.0 0.0 5.5 140.4 283.6 283.1 303.6 178.9 52.7 0.0 0.0 1248.1 2000 0.0 0.0 0.7 54.2 178.9 250.6 294.6 294.9 202.8 13.5 0.0 0.0 1290.4 2001 0.0 0.0 0.6 41.7 143.8 266.9 301.3 314.7 176.2 36.3 0.7 0.0 1282.3 2002 0.0 0.0 1.2 21.2 124.6 239.7 314.1 349.7 238.5 86.2 1.3 0.0 1376.7 2003 0.0 0.0 0.0 37.2 69.4 253.5 417.0 293.8 156.6 68.0 0.0 0.0 1295.7 2004 0.0 0.0 5.7 7.8 98.5 263.3 299.1 346.6 162.5 32.2 0.0 0.0 1215.8 2005 0.0 0.0 0.0 39.7 72.5 253.1 370.2 305.8 206.3 62.1 0.0 0.0 1309.8 MEAN 0.0 0.0 0.7 21.9 99.6 245.8 331.6 309.0 174.4 36.6 0.2 0.0 1219.8 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 9 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M 0C HEATING DEGREE DAYS (BASE 18) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 524.2 361.8 330.7 60.5 37.0 0.0 0.0 0.0 0.0 14.2 126.0 385.7 1840.0 1993 483.2 330.7 245.8 28.1 3.3 0.0 0.0 0.0 0.0 30.7 229.5 328.4 1679.7 1994 348.4 303.1 148.8 28.8 0.5 0.0 0.0 0.0 0.0 14.2 111.3 419.5 1374.5 1995 323.9 259.9 160.6 30.3 4.3 0.0 0.0 0.0 0.0 39.3 130.8 418.8 1367.9 1996 488.5 290.1 271.5 56.2 0.0 0.0 0.0 0.0 0.0 16.9 210.1 287.6 1620.9 1997 328.1 337.3 253.8 42.2 3.0 0.0 0.0 0.0 0.0 1.1 187.7 335.0 1488.3 1998 449.1 319.2 180.0 27.3 7.2 0.0 0.0 0.0 0.0 25.8 51.5 230.2 1290.3 1999 392.6 190.5 187.8 16.9 0.0 0.0 0.0 0.0 0.0 9.6 191.4 320.9 1309.7 2000 382.8 320.0 180.5 2.5 0.0 0.0 0.0 0.0 0.0 28.8 234.7 354.8 1504.1 2001 418.4 278.1 97.4 1.8 0.0 0.0 0.0 0.0 0.0 3.2 149.7 275.7 1224.1 2002 370.8 217.2 112.7 54.9 0.4 0.0 0.0 0.0 0.0 0.0 166.0 390.1 1312.1 2003 338.9 271.7 185.6 40.4 5.7 0.0 0.0 0.0 0.0 0.0 200.5 370.0 1412.8 2004 349.6 219.1 120.0 60.1 0.3 0.0 0.0 0.0 0.0 3.7 125.2 410.5 1288.5 2005 417.8 338.4 126.4 51.7 2.2 0.0 0.0 0.0 0.0 18.2 196.4 257.6 1408.7 MEAN 401.2 288.4 185.8 35.8 4.6 0.0 0.0 0.0 0.0 14.7 165.0 341.8 1437.3 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 10 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** 1993 ***** ***** -2.8 1.5 1.9 2.5 6.6 2.6 -1.3 -4.7 -1.6 -3.1 ****** 1994 -3.4 -5.3 -3.1 -0.8 1.1 2.5 7.0 5.4 0.2 4.8 0.8 -7.2 0.2 1995 -5.9 -7.2 -7.6 -0.6 1.4 5.9 1.4 7.1 0.8 -3.2 -8.5 -3.7 -1.7 1996 -5.4 0.3 0.1 0.5 6.8 5.2 6.8 2.6 0.4 -1.4 -2.5 -3.4 0.8 1997 -6.3 -12.1 -4.9 -3.9 3.3 8.4 7.0 5.8 -0.7 0.2 -0.3 -0.4 -0.3 1998 -3.7 -4.2 -1.0 2.6 3.3 3.2 7.3 5.4 1.2 0.3 -3.9 -4.8 0.5 1999 -2.7 -4.3 -2.4 -1.0 -0.7 -1.2 5.1 0.6 1.0 -1.3 -1.5 -5.0 -1.1 2000 -8.4 -6.8 -7.2 -2.0 -2.4 0.4 0.1 0.2 0.9 0.6 0.6 0.7 -1.9 2001 -5.2 -5.4 -2.4 -2.1 3.0 5.5 7.4 4.5 2.9 1.0 -4.5 -0.3 0.4 2002 -4.0 -8.7 -7.6 1.7 0.2 1.9 3.7 2.8 -1.7 -0.6 0.7 -4.5 -1.3 2003 -4.8 -4.8 -5.5 2.3 -1.2 4.9 8.9 2.7 2.8 -1.1 -4.7 -1.6 -0.2 2004 -0.8 -6.5 -2.6 0.7 4.0 3.0 4.6 3.5 -1.6 -1.6 -1.7 -2.9 -0.2 2005 -4.1 -4.2 -4.7 -1.6 1.5 1.5 6.1 3.2 -0.6 -2.7 -0.2 -1.0 -0.6 MEAN -4.6 -5.8 -4.0 -0.2 1.7 3.4 5.5 3.6 0.3 -0.7 -2.1 -2.9 -0.5 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 11 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 1993 ***** ***** 3.85 5.24 5.22 5.76 7.26 5.47 4.17 3.31 4.15 3.52 ***** 1994 3.54 3.06 3.80 4.39 4.96 5.62 7.64 6.87 4.69 6.54 4.87 2.80 4.90 1995 2.92 2.72 2.87 4.67 5.32 6.90 5.18 8.39 4.94 3.70 2.55 3.43 4.47 1996 3.06 4.57 4.61 4.85 7.26 6.79 7.48 5.59 4.71 4.18 3.67 3.57 5.03 1997 2.79 1.94 3.29 3.57 5.92 8.48 7.65 7.31 4.33 4.59 4.42 4.30 4.88 1998 3.40 3.35 4.31 5.50 5.73 5.68 7.63 6.69 5.07 4.62 3.40 3.22 4.88 1999 3.75 3.33 3.86 4.44 4.32 4.17 6.72 4.69 4.88 4.05 4.09 3.17 4.29 2000 2.46 2.78 2.71 3.99 3.82 4.67 4.64 4.64 4.82 4.86 4.72 4.71 4.07 2001 3.09 3.03 3.85 3.89 5.65 6.78 8.02 6.46 5.62 4.80 3.33 4.52 4.92 2002 3.34 2.40 2.85 5.30 4.66 5.15 5.94 5.60 3.97 4.26 4.79 3.33 4.30 2003 3.21 3.23 3.13 5.44 4.36 6.54 8.58 5.54 5.55 4.26 3.24 4.11 4.77 2004 4.29 2.82 3.75 4.82 6.00 5.65 6.49 5.89 4.10 4.03 4.25 3.76 4.65 2005 3.34 3.27 3.47 4.28 5.09 5.12 6.94 5.87 4.42 3.66 4.39 4.18 4.50 MEAN 3.27 3.04 3.57 4.64 5.25 5.95 6.94 6.08 4.71 4.37 3.99 3.74 4.63 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 12 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 1993 ***** ***** 5.37 7.28 7.26 7.97 10.03 7.60 5.81 4.65 5.81 4.95 ***** 1994 4.96 4.27 5.30 6.12 6.90 7.76 10.51 9.47 6.56 9.14 6.80 3.93 6.81 1995 4.11 3.80 4.01 6.49 7.41 9.54 7.15 11.52 6.87 5.18 3.58 4.82 6.21 1996 4.30 6.37 6.42 6.76 10.08 9.39 10.34 7.75 6.55 5.85 5.16 5.01 7.00 1997 3.91 2.73 4.58 4.97 8.23 11.69 10.52 10.07 6.04 6.42 6.20 6.02 6.78 1998 4.76 4.68 6.01 7.65 7.97 7.90 10.52 9.28 7.06 6.47 4.77 4.53 6.80 1999 5.26 4.65 5.38 6.19 6.01 5.79 9.27 6.52 6.79 5.67 5.73 4.46 5.98 2000 3.45 3.89 3.79 5.57 5.32 6.47 6.44 6.45 6.71 6.80 6.62 6.60 5.67 2001 4.34 4.24 5.38 5.43 7.84 9.36 11.03 8.95 7.82 6.72 4.67 6.33 6.84 2002 4.68 3.36 3.97 7.36 6.48 7.15 8.23 7.76 5.55 5.97 6.72 4.66 5.99 2003 4.50 4.51 4.37 7.58 6.09 9.03 11.78 7.69 7.72 5.95 4.56 5.76 6.63 2004 5.99 3.95 5.26 6.71 8.33 7.83 8.97 8.14 5.72 5.66 5.94 5.26 6.48 2005 4.68 4.57 4.83 5.98 7.09 7.09 9.59 8.13 6.15 5.13 6.15 5.86 6.27 MEAN 4.58 4.25 4.97 6.47 7.31 8.23 9.57 8.41 6.57 6.12 5.59 5.25 6.44 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 13 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 1993 ***** ***** 8.28 16.15 24.06 37.93 35.24 36.05 32.40 16.20 7.20 6.38 ***** 1994 5.84 7.07 11.46 19.30 25.96 37.86 44.15 43.94 25.79 14.08 11.05 5.68 21.01 1995 7.55 8.58 12.76 16.46 23.35 33.10 49.60 44.17 32.33 19.73 14.67 4.16 22.20 1996 3.68 5.35 6.37 15.61 23.48 36.38 36.77 41.91 37.65 19.39 9.59 7.53 20.31 1997 7.52 8.31 8.88 18.88 24.39 33.34 47.51 44.38 32.91 23.59 8.74 4.83 21.94 1998 3.74 6.01 10.14 18.71 25.59 39.54 42.23 41.11 33.61 20.52 15.72 9.22 22.18 1999 4.06 9.70 10.09 18.04 31.63 44.87 38.81 44.40 33.48 24.01 9.40 6.84 22.94 2000 6.57 7.46 12.71 24.65 35.58 41.60 43.99 43.56 34.86 17.14 6.78 3.64 23.21 2001 4.95 7.79 13.87 23.99 29.44 38.89 38.14 42.38 31.97 21.46 12.26 5.98 22.59 2002 5.62 10.68 14.94 15.74 28.70 38.66 42.14 45.55 39.27 26.21 9.38 4.93 23.49 2003 6.56 7.58 11.38 17.35 24.81 36.41 47.00 41.00 30.85 25.47 10.34 4.32 21.92 2004 4.22 10.34 14.54 15.24 24.81 39.77 40.11 45.33 33.69 21.84 11.58 3.88 22.11 2005 4.35 6.02 13.32 19.95 24.48 39.84 45.75 41.89 36.43 24.73 8.88 7.42 22.76 MEAN 5.39 7.91 11.44 18.47 26.64 38.32 42.42 42.74 33.48 21.10 10.43 5.76 22.01 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 14 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 *** *** *** *** *** *** *** *** *** *** *** *** *** 1993 *** *** 42 36 26 19 23 19 16 24 48 46 *** 1994 49 42 36 27 24 18 21 19 22 42 39 42 32 1995 37 33 26 32 29 25 14 22 19 23 20 57 28 1996 59 60 57 34 33 23 23 17 16 25 37 42 36 1997 37 26 39 23 27 28 19 19 17 24 44 59 30 1998 59 49 42 32 27 18 21 20 19 28 25 35 31 1999 59 35 41 28 17 13 21 14 19 21 42 42 29 2000 37 38 25 19 14 15 14 14 17 33 53 66 29 2001 52 39 33 20 24 22 24 19 21 26 31 55 31 2002 51 28 23 38 21 17 18 16 13 20 46 51 29 2003 49 42 30 36 21 21 22 17 21 20 33 61 31 2004 62 31 35 35 28 18 20 16 16 22 36 60 32 2005 56 51 29 26 25 17 19 18 16 19 45 46 31 MEAN 51 40 35 30 24 20 20 18 18 25 38 51 30 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 15 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 *** *** *** *** *** *** *** *** *** *** *** *** *** 1993 *** *** 64 52 41 27 33 27 23 34 65 59 *** 1994 65 59 53 43 37 26 33 26 30 54 51 56 44 1995 47 46 41 49 40 35 20 29 28 32 26 70 39 1996 70 75 76 53 50 33 35 26 23 36 49 58 49 1997 51 38 56 36 39 37 27 26 24 32 58 72 41 1998 80 69 59 45 40 25 29 30 25 39 31 43 43 1999 71 49 57 42 26 18 30 19 25 29 55 52 39 2000 46 56 35 28 20 22 20 20 24 44 68 80 39 2001 66 54 46 28 34 29 33 27 27 34 41 66 40 2002 65 39 36 54 30 23 27 23 18 26 59 70 39 2003 60 60 47 49 30 30 29 24 29 26 43 73 42 2004 78 46 46 53 41 24 29 23 24 30 50 74 43 2005 71 70 47 38 40 24 26 27 22 25 59 58 42 MEAN 64 55 51 44 36 27 29 25 25 34 50 64 42 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 16 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 *** *** *** *** *** *** *** *** *** *** *** *** *** 1993 *** *** 30 26 18 14 16 13 11 17 35 37 *** 1994 38 30 25 17 16 13 14 14 16 33 31 32 23 1995 28 23 18 22 21 17 9 17 14 17 15 46 21 1996 49 47 44 23 24 16 16 12 12 18 31 32 27 1997 28 18 28 14 20 22 14 14 12 19 35 47 23 1998 45 36 32 24 20 13 16 15 14 21 20 28 24 1999 49 26 30 19 12 9 15 10 14 16 34 33 22 2000 30 27 18 14 9 10 9 10 13 24 42 55 22 2001 41 27 24 14 17 17 18 14 16 20 23 47 23 2002 39 20 14 27 15 13 12 11 10 15 37 38 21 2003 40 29 20 27 15 16 17 12 17 16 26 50 24 2004 48 21 27 24 20 14 15 12 11 17 26 49 24 2005 43 38 19 18 16 12 14 13 11 14 36 37 23 MEAN 40 29 25 21 17 14 14 13 13 19 30 41 23 RH=0 =====> RELATIVE HUMIDITY < 0.5% =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 17 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF RELATIVE HUMIDITY AT 03 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 *** *** *** *** *** *** *** *** *** *** *** *** *** 1993 *** *** 57 49 38 27 32 25 22 30 59 58 *** 1994 62 56 50 40 35 25 32 25 29 53 47 51 42 1995 45 42 38 46 39 35 20 27 27 31 25 68 37 1996 66 69 73 51 49 32 35 26 22 34 46 54 46 1997 49 36 53 34 38 36 26 25 23 32 57 65 40 1998 76 64 57 43 38 25 28 29 25 38 29 39 41 1999 68 47 54 41 26 18 30 18 24 28 53 49 38 2000 43 53 35 26 20 22 19 20 23 41 66 75 37 2001 63 53 44 27 33 29 33 27 27 33 38 65 39 2002 63 38 33 52 29 23 27 21 17 24 56 67 38 2003 56 59 44 48 28 30 28 23 28 25 42 70 40 2004 76 44 45 49 40 24 28 23 23 29 47 72 42 2005 67 69 45 37 37 24 26 27 21 25 58 56 41 MEAN 61 53 48 42 35 27 28 24 24 33 48 61 40 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 18 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF RELATIVE HUMIDITY AT 09 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 *** *** *** *** *** *** *** *** *** *** *** *** *** 1993 *** *** 34 31 22 18 20 16 14 19 40 41 *** 1994 45 37 31 23 19 17 19 17 19 37 35 38 28 1995 34 29 23 26 25 22 13 20 17 20 18 53 25 1996 57 56 51 29 28 20 20 15 14 23 33 34 32 1997 32 23 35 19 24 25 17 18 15 21 40 56 27 1998 52 43 38 29 24 16 19 18 16 25 23 33 28 1999 55 31 36 25 15 11 19 12 17 18 39 38 26 2000 35 35 22 18 12 14 12 12 16 29 49 60 26 2001 47 34 29 18 20 20 21 17 19 23 28 51 27 2002 47 25 19 34 19 15 16 15 12 18 42 44 26 2003 44 37 27 32 18 19 20 16 20 18 29 58 28 2004 57 27 32 31 24 16 18 14 14 20 32 54 28 2005 51 45 24 22 20 15 17 15 15 17 41 43 27 MEAN 46 35 31 26 21 18 18 16 16 22 35 46 28 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 19 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF RELATIVE HUMIDITY AT 15 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 *** *** *** *** *** *** *** *** *** *** *** *** *** 1993 *** *** 41 33 23 16 17 14 14 21 43 47 *** 1994 49 40 32 26 21 14 16 15 19 41 38 42 29 1995 37 31 23 31 25 19 10 19 17 22 20 55 26 1996 59 60 55 32 31 19 18 13 14 23 38 42 34 1997 37 23 33 20 24 25 15 16 14 22 42 60 28 1998 55 47 38 27 23 14 17 16 17 25 25 36 28 1999 57 30 38 22 14 10 17 12 16 20 42 43 27 2000 36 33 21 18 11 11 10 11 15 33 52 74 27 2001 56 35 29 18 20 18 18 16 18 24 33 55 28 2002 48 26 20 36 18 14 13 12 11 20 49 49 26 2003 52 37 25 33 18 17 17 13 18 19 30 61 28 2004 59 29 33 31 24 15 16 13 13 20 36 62 29 2005 57 45 25 22 22 12 15 14 12 17 42 46 27 MEAN 50 36 32 27 21 16 15 14 15 24 38 52 28 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 20 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH MAXIMUM TEMPERATURE EQUAL 30 AND ABOVE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 0 0 0 1 7 30 31 27 20 0 0 0 116 1993 0 0 0 2 14 30 31 31 29 2 0 0 139 1994 0 0 0 5 15 30 31 31 12 0 0 0 124 1995 0 0 0 0 12 26 31 31 25 5 0 0 130 1996 0 0 0 0 12 30 31 31 28 2 0 0 134 1997 0 0 0 3 13 29 31 31 24 7 0 0 138 1998 0 0 0 6 22 30 31 31 27 7 0 0 154 1999 0 0 0 0 22 30 31 31 24 8 0 0 146 2000 0 0 0 11 30 28 31 31 29 2 0 0 162 2001 0 0 0 7 24 27 31 31 25 6 0 0 151 2002 0 0 0 4 18 30 31 31 30 15 0 0 159 2003 0 0 0 6 13 29 31 31 22 7 0 0 139 2004 0 0 0 1 17 30 31 31 19 7 0 0 136 2005 0 0 0 7 16 28 31 30 30 11 0 0 153 MEAN 0.0 0.0 0.0 3.8 16.8 29.1 31.0 30.6 24.6 5.6 0.0 0.0 141.5 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 21 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH MAXIMUM TEMPERATURE EQUAL 00 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 6 0 0 0 0 0 0 0 0 0 0 0 6 1993 1 0 0 0 0 0 0 0 0 0 0 0 1 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 6 0 0 0 0 0 0 0 0 0 0 0 6 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 2001 1 0 0 0 0 0 0 0 0 0 0 0 1 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 2004 0 0 0 0 0 0 0 0 0 0 0 0 0 2005 0 1 0 0 0 0 0 0 0 0 0 0 1 MEAN 1.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.1 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 22 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL 21 AND ABOVE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 0 0 0 0 2 18 30 23 5 0 0 0 78 1993 0 0 0 0 5 23 30 26 18 0 0 0 102 1994 0 0 0 0 5 22 31 31 4 0 0 0 93 1995 0 0 0 0 0 20 31 31 18 1 0 0 101 1996 0 0 0 0 7 21 30 28 22 0 0 0 108 1997 0 0 0 0 6 28 31 31 11 3 0 0 110 1998 0 0 0 0 6 23 31 29 15 1 0 0 105 1999 0 0 0 0 8 26 26 31 19 0 0 0 110 2000 0 0 0 1 7 23 28 30 18 0 0 0 107 2001 0 0 0 1 9 25 29 27 15 0 0 0 106 2002 0 0 0 1 9 20 31 31 24 2 0 0 118 2003 0 0 0 1 1 25 31 30 15 4 0 0 107 2004 0 0 0 0 4 23 27 31 12 0 0 0 97 2005 0 0 0 1 0 21 31 28 20 0 0 0 101 MEAN 0.0 0.0 0.0 0.4 4.9 22.7 29.8 29.1 15.4 0.8 0.0 0.0 103.1 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 23 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL -4 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 11 2 4 0 0 0 0 0 0 0 0 2 19 1993 3 1 0 0 0 0 0 0 0 0 0 1 5 1994 0 1 0 0 0 0 0 0 0 0 0 12 13 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 12 1 0 0 0 0 0 0 0 0 0 0 13 1997 2 8 1 0 0 0 0 0 0 0 0 0 11 1998 2 2 1 0 0 0 0 0 0 0 0 0 5 1999 3 0 0 0 0 0 0 0 0 0 0 0 3 2000 4 2 0 0 0 0 0 0 0 0 0 0 6 2001 4 0 0 0 0 0 0 0 0 0 0 0 4 2002 0 0 0 0 0 0 0 0 0 0 0 1 1 2003 2 1 0 0 0 0 0 0 0 0 0 3 6 2004 0 0 0 0 0 0 0 0 0 0 0 0 0 2005 5 2 0 0 0 0 0 0 0 0 0 1 8 MEAN 3.4 1.4 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.4 6.6 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 24 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL 00 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 26 18 11 0 0 0 0 0 0 0 3 8 66 1993 25 13 3 0 0 0 0 0 0 0 6 6 53 1994 6 10 0 0 0 0 0 0 0 0 0 17 33 1995 8 4 0 0 0 0 0 0 0 0 4 16 32 1996 19 3 1 0 0 0 0 0 0 0 0 2 25 1997 6 15 4 0 0 0 0 0 0 0 0 2 27 1998 21 11 3 0 0 0 0 0 0 0 0 0 35 1999 7 0 0 0 0 0 0 0 0 0 1 4 12 2000 17 8 1 0 0 0 0 0 0 0 0 1 27 2001 10 3 0 0 0 0 0 0 0 0 2 1 16 2002 16 4 0 0 0 0 0 0 0 0 0 17 37 2003 7 3 3 0 0 0 0 0 0 0 0 8 21 2004 2 1 0 0 0 0 0 0 0 0 2 13 18 2005 15 14 0 0 0 0 0 0 0 0 0 5 34 MEAN 13.2 7.6 1.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 7.1 31.1 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 25 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MONTHLY TOTAL OF PRECIPITATION IN MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 9.7 3.0 21.3 12.5 57.4 3.5 3.3 5.0 0.0 0.0 0.0 38.6 154.3 1993 35.5 12.5 26.9 24.0 2.7 0.0 0.0 0.0 0.0 0.0 3.3 4.0 108.9 1994 11.0 8.3 30.9 5.7 2.4 0.0 0.0 0.0 0.0 6.7 0.9 0.1 66.0 1995 2.1 9.0 23.0 34.9 40.6 0.6 0.0 0.0 0.2 0.0 0.0 11.6 122.0 1996 22.1 84.2 60.5 16.1 6.3 6.0 0.0 0.0 0.0 2.0 0.0 7.0 204.2 1997 1.5 0.0 33.8 4.4 8.8 0.9 0.0 0.0 0.0 3.5 1.5 18.1 72.5 1998 11.5 39.7 35.6 0.8 8.2 0.0 0.0 10.0 0.0 3.6 0.0 0.0 109.4 1999 41.0 0.8 67.4 6.2 0.0 0.0 2.6 0.0 0.2 0.0 9.5 2.2 129.9 2000 8.0 14.8 0.2 0.0 0.0 0.0 0.0 0.0 0.0 13.9 51.2 41.1 129.2 2001 14.4 9.0 12.7 0.0 12.8 0.7 0.0 0.3 0.4 0.0 1.4 8.8 60.5 2002 13.5 3.0 7.9 60.6 4.2 0.0 0.0 0.0 0.0 0.2 17.6 8.0 115.0 2003 36.3 12.0 2.4 18.3 3.1 0.0 0.0 0.0 0.0 0.0 4.8 31.9 108.8 2004 32.5 5.6 19.9 17.5 5.1 0.0 1.0 0.0 0.0 0.0 2.7 50.4 134.7 2005 47.1 10.8 0.0 5.3 15.3 0.0 0.0 0.9 0.0 0.0 16.0 11.0 106.4 MEAN 20.4 15.2 24.5 14.7 11.9 0.8 0.5 1.2 0.1 2.1 7.8 16.6 115.8 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 26 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M GREATEST DAILY OF PRECIPITATION IN MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 4.0 3.0 9.0 5.0 20.0 3.0 3.0 5.0 0.0 0.0 0.0 23.0 23.0 DAY 17 26 31 25 7 15 9 12 ** ** ** 4 1993 10.7 4.0 16.0 6.0 2.0 0.0 0.0 0.0 0.0 0.0 2.3 4.0 16.0 DAY 7 6 9 27 6 ** ** ** ** ** 27 16 1994 5.0 6.0 19.0 2.0 1.0 0.0 0.0 0.0 0.0 5.0 0.8 0.1 19.0 DAY 24 19 27 28 1 ** ** ** ** 17 17 26 1995 2.1 6.1 21.0 9.0 31.0 0.6 0.0 0.0 0.2 0.0 0.0 6.6 31.0 DAY 1 24 21 23 29 6 ** ** 22 ** ** 12 1996 16.0 51.0 27.0 9.0 4.0 3.0 0.0 0.0 0.0 2.0 0.0 6.0 51.0 DAY 13 22 4 4 8 28 ** ** ** 10 ** 15 1997 1.0 0.0 17.0 2.0 3.0 0.6 0.0 0.0 0.0 3.1 1.0 15.0 17.0 DAY 17 ** 16 4 19 17 ** ** ** 24 3 21 1998 6.0 22.0 15.0 0.8 6.5 0.0 0.0 10.0 0.0 2.0 0.0 0.0 22.0 DAY 5 12 10 6 14 ** ** 4 ** 12 ** ** 1999 12.0 0.4 31.0 2.0 0.0 0.0 2.0 0.0 0.2 0.0 7.0 2.0 31.0 DAY 25 6 2 22 ** ** 14 ** 28 ** 9 12 2000 4.0 11.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 11.5 31.0 15.0 31.0 DAY 30 8 28 ** ** ** ** ** ** 4 6 10 2001 7.0 6.0 7.0 0.0 11.0 0.4 0.0 0.3 0.4 0.0 1.0 4.0 11.0 DAY 27 11 11 ** 3 15 ** 12 26 ** 13 2 2002 9.0 3.0 3.0 27.0 3.0 0.0 0.0 0.0 0.0 0.2 8.0 4.0 27.0 DAY 12 20 23 12 3 ** ** ** ** 22 7 11 2003 13.0 12.0 1.0 12.0 2.0 0.0 0.0 0.0 0.0 0.0 4.0 12.0 13.0 DAY 19 17 26 22 29 ** ** ** ** ** 29 31 2004 9.0 5.0 8.6 7.0 4.0 0.0 1.0 0.0 0.0 0.0 1.0 15.0 15.0 DAY 27 7 20 25 5 ** 11 ** ** ** 19 10 2005 29.4 5.0 0.0 3.1 6.0 0.0 0.0 0.9 0.0 0.0 5.0 10.0 29.4 DAY 12 8 ** 17 15 ** ** 11 ** ** 8 18 1992-2005 29.4 51.0 31.0 27.0 31.0 3.0 3.0 10.0 0.4 11.5 31.0 23.0 51.0 YEAR-DAY 5-12 96-22 99- 2 2-12 95-29 92-15 92- 9 98- 4 1-26 0- 4 0- 6 92- 4 96 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 27 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH PRECIPITATION EQUAL TO OR GREATER THAN 10 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 0 0 0 0 3 0 0 0 0 0 0 2 5 1993 1 0 1 0 0 0 0 0 0 0 0 0 2 1994 0 0 1 0 0 0 0 0 0 0 0 0 1 1995 0 0 1 0 1 0 0 0 0 0 0 0 2 1996 1 2 2 0 0 0 0 0 0 0 0 0 5 1997 0 0 1 0 0 0 0 0 0 0 0 1 2 1998 0 2 2 0 0 0 0 1 0 0 0 0 5 1999 2 0 2 0 0 0 0 0 0 0 0 0 4 2000 0 1 0 0 0 0 0 0 0 1 1 2 5 2001 0 0 0 0 1 0 0 0 0 0 0 0 1 2002 0 0 0 3 0 0 0 0 0 0 0 0 3 2003 1 1 0 1 0 0 0 0 0 0 0 1 4 2004 0 0 0 0 0 0 0 0 0 0 0 2 2 2005 1 0 0 0 0 0 0 0 0 0 0 1 2 MEAN 0.4 0.4 0.7 0.3 0.4 0.0 0.0 0.1 0.0 0.1 0.1 0.6 3.1 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 28 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH PRECIPITATION EQUAL TO OR GREATER THAN 5 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 0 0 2 1 5 0 0 1 0 0 0 3 12 1993 4 0 2 2 0 0 0 0 0 0 0 0 8 1994 1 1 1 0 0 0 0 0 0 1 0 0 4 1995 0 1 1 4 2 0 0 0 0 0 0 1 9 1996 1 4 3 1 0 0 0 0 0 0 0 1 10 1997 0 0 3 0 0 0 0 0 0 0 0 1 4 1998 1 2 2 0 1 0 0 1 0 0 0 0 7 1999 3 0 4 0 0 0 0 0 0 0 1 0 8 2000 0 1 0 0 0 0 0 0 0 1 2 3 7 2001 1 1 2 0 1 0 0 0 0 0 0 0 5 2002 1 0 0 3 0 0 0 0 0 0 2 0 6 2003 4 1 0 1 0 0 0 0 0 0 0 2 8 2004 3 1 2 1 0 0 0 0 0 0 0 3 10 2005 2 1 0 0 2 0 0 0 0 0 1 1 7 MEAN 1.5 0.9 1.6 0.9 0.8 0.0 0.0 0.1 0.0 0.1 0.4 1.1 7.4 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 29 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH PRECIPITATION EQUAL TO OR GREATER THAN 1 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 4 1 4 4 6 1 1 1 0 0 0 3 25 1993 6 4 4 6 1 0 0 0 0 0 2 1 24 1994 3 2 5 3 2 0 0 0 0 2 0 0 17 1995 1 2 2 6 5 0 0 0 0 0 0 4 20 1996 3 6 7 3 1 3 0 0 0 1 0 2 26 1997 1 0 5 3 4 0 0 0 0 1 1 2 17 1998 3 2 6 0 1 0 0 1 0 1 0 0 14 1999 10 0 5 4 0 0 1 0 0 0 2 1 23 2000 2 2 0 0 0 0 0 0 0 2 7 6 19 2001 5 3 2 0 2 0 0 0 0 0 1 2 15 2002 3 1 4 6 1 0 0 0 0 0 4 3 22 2003 4 1 1 3 1 0 0 0 0 0 1 7 18 2004 6 1 4 4 2 0 1 0 0 0 1 8 27 2005 5 3 0 2 4 0 0 0 0 0 6 2 22 MEAN 4.0 2.0 3.5 3.1 2.1 0.3 0.2 0.1 0.0 0.5 1.8 2.9 20.5 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 30 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH PRECIPITATION YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 6 1 7 6 7 2 3 1 0 0 0 5 38 1993 9 9 8 8 4 0 0 0 0 0 3 1 42 1994 5 4 7 5 3 0 0 0 0 4 2 3 33 1995 1 5 7 10 5 2 0 0 1 0 0 6 37 1996 3 7 9 7 7 4 0 0 0 2 2 2 43 1997 3 0 10 5 9 5 0 0 0 2 2 7 43 1998 8 7 8 3 7 0 1 3 1 3 0 2 43 1999 11 2 8 7 0 0 2 0 1 0 5 3 39 2000 4 4 1 1 0 0 0 0 0 5 8 12 35 2001 6 3 5 0 3 2 0 2 2 0 2 7 32 2002 6 1 4 8 3 0 0 1 0 1 6 4 34 2003 7 1 3 6 4 0 0 0 0 0 3 8 32 2004 9 3 6 8 2 0 1 0 0 0 5 10 44 2005 6 8 0 3 7 0 0 1 0 0 7 2 34 MEAN 6.0 3.9 5.9 5.5 4.4 1.1 0.5 0.6 0.4 1.2 3.2 5.1 37.8 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 31 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH THUNDER STORM YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 0 0 0 1 0 1 0 1 0 0 0 1 4 1993 0 0 0 2 1 0 0 0 0 0 0 0 3 1994 0 0 1 3 1 0 0 0 0 1 0 0 6 1995 0 0 0 1 1 2 0 0 1 0 0 0 5 1996 0 0 0 0 5 0 0 0 0 0 0 0 5 1997 0 0 1 1 2 1 0 0 0 1 0 0 6 1998 0 0 0 1 0 0 0 0 0 0 0 0 1 1999 0 0 0 1 0 0 0 0 0 0 1 0 2 2000 0 0 0 0 0 0 0 0 0 1 1 0 2 2001 0 0 0 0 1 0 1 0 0 0 0 0 2 2002 0 0 0 1 0 0 0 0 0 0 0 0 1 2003 0 0 0 1 2 0 0 0 0 0 0 0 3 2004 0 0 0 0 0 0 2 0 0 0 0 0 2 2005 0 0 0 1 2 0 0 0 0 0 0 0 3 MEAN 0.0 0.0 0.1 0.9 1.1 0.3 0.2 0.1 0.1 0.2 0.1 0.1 3.2 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 32 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH SNOW OR SLEET YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 6 2 2 0 1 0 0 0 0 0 0 2 13 1993 8 2 0 0 0 0 0 0 0 0 0 0 10 1994 1 1 0 0 0 0 0 0 0 0 0 2 4 1995 0 1 0 0 0 0 0 0 0 0 0 1 2 1996 3 3 0 0 0 0 0 0 0 0 0 0 6 1997 0 0 2 0 0 0 0 0 0 0 0 1 3 1998 3 2 2 0 0 0 0 0 0 0 0 0 7 1999 3 1 0 0 0 0 0 0 0 0 0 0 4 2000 1 0 0 0 0 0 0 0 0 0 0 0 1 2001 3 1 0 0 0 0 0 0 0 0 0 0 4 2002 2 1 0 0 0 0 0 0 0 0 0 0 3 2003 3 1 0 0 0 0 0 0 0 0 0 2 6 2004 0 0 2 0 0 0 0 0 0 0 0 2 4 2005 3 3 0 0 0 0 0 0 0 0 0 0 6 MEAN 2.6 1.3 0.6 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.7 5.3 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 33 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH DUST YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 1 1 0 0 0 0 2 0 1 1 4 0 10 1993 1 0 2 4 7 2 1 3 2 0 2 0 24 1994 1 1 4 12 13 13 13 1 5 1 2 5 71 1995 0 1 4 6 7 4 13 1 3 4 2 2 47 1996 1 0 2 6 4 6 3 2 6 2 0 0 32 1997 2 3 3 1 2 3 3 0 1 4 0 2 24 1998 0 3 4 3 1 3 10 1 1 1 0 0 27 1999 1 1 4 2 5 6 2 1 4 3 3 3 35 2000 2 1 6 8 5 4 1 0 3 0 2 0 32 2001 0 0 0 1 0 0 0 0 0 0 0 0 1 2002 0 0 0 1 0 0 1 0 0 0 0 0 2 2003 0 0 4 0 1 0 0 0 0 0 2 0 7 2004 0 2 0 0 2 0 0 0 0 0 0 0 4 2005 0 1 1 2 2 1 0 1 0 0 0 0 8 MEAN 0.6 1.0 2.4 3.3 3.5 3.0 3.5 0.7 1.9 1.1 1.2 0.9 23.1 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 34 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M PREVAILING WIND DIRECTION , SPEED (IN KNOTS) AND PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 315 180 315 315 360 360 45 45 45 180 180 180 45 PREVAIL. DIRECT. 6.9 13.3 9.6 14.4 8.1 8.8 12.4 10.3 7.6 12.1 12.8 8.8 10.0 PREVAIL. SPEED 11.0 13.1 12.9 9.3 10.3 14.0 32.9 45.5 27.3 16.8 18.0 15.1 15.5 PREVAIL. PERCENT 59.4 44.1 52.9 55.3 54.2 35.3 14.2 10.4 19.3 31.0 40.0 56.6 39.4 CALMS PERCENT 155 145 155 150 155 150 155 154 150 155 150 152 1826 WIND OBSER. NO. 1993 180 315 45 180 315 45 45 45 180 180 180 180 180 PREVAIL. DIRECT. 9.5 8.9 10.5 13.1 10.5 11.9 12.0 11.3 11.9 10.6 10.9 8.8 11.1 PREVAIL. SPEED 12.9 16.4 16.1 17.3 16.8 19.3 22.6 23.8 31.7 28.2 22.5 20.0 18.2 PREVAIL. PERCENT 56.8 40.7 38.7 20.0 18.7 10.0 19.4 18.1 17.9 34.3 47.5 58.1 30.8 CALMS PERCENT 155 140 155 150 155 150 248 248 240 248 240 155 2284 WIND OBSER. NO. 1994 180 180 315 360 360 45 45 45 45 180 180 180 45 PREVAIL. DIRECT. 12.1 9.3 8.4 7.4 8.0 12.3 12.7 12.6 9.5 10.7 13.4 10.7 10.5 PREVAIL. SPEED 18.1 18.6 20.0 22.0 20.6 24.0 42.6 40.0 47.3 14.2 20.0 14.8 20.1 PREVAIL. PERCENT 41.3 31.4 28.4 18.0 20.6 13.3 14.2 14.8 18.0 45.8 46.7 54.2 28.9 CALMS PERCENT 155 140 155 150 155 150 155 155 150 155 150 155 1825 WIND OBSER. NO. 1995 180 180 180 180 360 360 45 45 45 180 180 180 45 PREVAIL. DIRECT. 11.5 12.8 13.4 15.1 8.0 9.1 11.7 12.0 9.9 13.4 15.0 8.2 10.1 PREVAIL. SPEED 19.4 16.4 15.5 15.3 17.4 20.7 31.6 36.8 26.7 16.1 18.0 8.4 15.1 PREVAIL. PERCENT 59.4 47.1 40.6 40.7 27.7 38.0 25.2 18.7 34.0 41.3 54.7 77.4 42.0 CALMS PERCENT 155 140 155 150 155 150 155 155 150 155 150 155 1825 WIND OBSER. NO. 1996 180 180 315 360 360 45 45 45 180 180 180 180 45 PREVAIL. DIRECT. 11.4 13.6 8.6 7.1 7.9 13.6 12.1 13.1 12.3 10.0 10.5 13.0 10.8 PREVAIL. SPEED 20.0 19.3 11.6 22.7 18.1 40.0 43.2 29.7 16.0 14.8 13.3 16.8 16.7 PREVAIL. PERCENT 64.5 55.2 45.8 22.0 38.1 12.7 19.4 23.2 35.3 54.8 55.3 54.8 40.1 CALMS PERCENT 155 145 155 150 155 150 155 155 150 155 150 155 1830 WIND OBSER. NO. 1997 180 180 180 180 360 360 45 45 45 180 180 180 180 PREVAIL. DIRECT. 12.8 11.6 12.5 12.7 8.1 8.8 15.2 15.0 12.7 14.2 12.8 11.1 12.8 PREVAIL. SPEED 19.4 11.4 16.8 17.3 18.7 19.3 29.0 33.5 17.3 18.7 12.7 13.5 14.2 PREVAIL. PERCENT 49.7 44.3 43.9 24.7 28.4 26.0 22.6 21.3 35.3 38.1 56.0 54.8 37.0 CALMS PERCENT 155 140 155 150 155 150 155 155 150 155 150 155 1825 WIND OBSER. NO. 1998 180 45 180 180 45 45 45 45 45 45 180 180 45 PREVAIL. DIRECT. 10.1 9.4 14.4 13.7 11.4 15.3 15.0 13.9 11.1 9.9 13.5 9.7 12.6 PREVAIL. SPEED 11.6 12.9 18.1 16.7 23.2 46.7 39.4 28.4 20.7 12.9 20.0 16.8 19.1 PREVAIL. PERCENT 63.2 52.1 41.3 32.7 19.4 20.0 14.2 24.5 28.7 46.5 54.7 61.3 38.1 CALMS PERCENT 155 140 155 150 155 150 155 155 150 155 150 155 1825 WIND OBSER. NO. 1999 180 180 180 180 315 45 45 45 360 360 180 180 45 PREVAIL. DIRECT. 10.8 13.2 12.4 13.9 11.1 13.4 13.9 14.2 7.7 8.1 13.0 9.3 12.3 PREVAIL. SPEED 12.3 21.4 12.9 14.7 23.2 24.0 46.5 51.6 28.7 22.6 16.7 19.4 19.8 PREVAIL. PERCENT 68.4 42.1 53.5 29.3 10.3 14.7 11.0 7.7 9.3 18.1 36.0 49.7 29.2 CALMS PERCENT 155 140 155 150 155 150 155 155 150 155 150 155 1825 WIND OBSER. NO. 2000 180 180 180 360 315 45 45 45 45 180 180 180 45 PREVAIL. DIRECT. 11.6 9.6 14.9 8.3 9.4 13.8 13.6 12.6 12.4 13.4 10.5 9.5 11.8 PREVAIL. SPEED 21.9 18.6 25.8 26.0 21.9 38.0 54.8 43.2 28.7 17.4 14.7 10.3 22.0 PREVAIL. PERCENT 38.1 48.3 21.3 16.0 21.3 16.7 15.5 15.5 24.0 38.7 54.0 62.6 30.9 CALMS PERCENT 155 145 155 150 155 150 155 155 150 155 150 155 1830 WIND OBSER. NO. 2001 180 180 180 360 360 45 45 45 45 180 180 180 45 PREVAIL. DIRECT. 11.3 12.3 14.4 8.1 7.6 11.7 12.9 11.9 12.1 10.8 12.2 11.7 11.1 PREVAIL. SPEED 20.0 14.3 20.0 22.7 19.4 31.3 45.2 31.6 28.7 18.1 14.0 9.7 17.9 PREVAIL. PERCENT 51.0 58.6 34.2 18.7 19.4 14.7 24.5 21.9 30.7 29.0 62.7 78.7 36.9 CALMS PERCENT 155 140 155 150 155 150 155 155 150 155 150 155 1825 WIND OBSER. NO. 2002 180 180 180 180 360 45 45 45 45 180 180 315 45 PREVAIL. DIRECT. 10.6 12.3 13.5 13.1 7.1 11.2 13.6 13.6 10.9 14.4 10.5 6.9 11.4 PREVAIL. SPEED 11.0 17.9 17.4 14.7 22.6 26.0 44.5 41.9 24.7 18.7 16.7 11.0 16.5 PREVAIL. PERCENT 68.4 44.3 44.5 38.0 23.9 29.3 25.8 25.2 37.3 43.9 64.0 55.5 41.6 CALMS PERCENT 155 140 155 150 155 150 155 155 150 155 150 155 1825 WIND OBSER. NO. 2003 180 315 45 315 360 45 45 45 45 180 315 180 45 PREVAIL. DIRECT. 12.0 9.5 8.4 9.5 8.3 10.1 13.6 13.3 11.8 14.0 7.5 9.5 10.9 PREVAIL. SPEED 21.3 13.6 16.1 19.3 22.6 26.0 32.9 44.5 32.7 28.4 15.3 14.2 18.3 PREVAIL. PERCENT 43.9 42.9 28.4 25.3 22.6 12.7 15.5 21.3 20.0 31.6 54.0 56.8 31.2 CALMS PERCENT 155 140 155 150 155 150 155 155 150 155 150 155 1825 WIND OBSER. NO. 2004 180 180 180 315 180 45 45 45 45 180 180 180 45 PREVAIL. DIRECT. 10.6 15.0 13.5 10.0 12.6 13.5 11.6 10.8 10.2 12.0 11.6 10.2 10.9 PREVAIL. SPEED 16.8 19.3 18.1 18.7 14.8 32.7 27.1 43.9 32.0 16.1 14.7 11.6 18.7 PREVAIL. PERCENT 51.0 29.0 32.3 16.0 21.3 21.3 23.9 20.0 36.0 51.6 54.0 74.2 36.0 CALMS PERCENT 155 145 155 150 155 150 155 155 150 155 150 155 1830 WIND OBSER. NO. 2005 180 180 180 315 315 45 45 45 45 180 180 180 45 PREVAIL. DIRECT. 10.9 11.4 14.0 9.7 12.2 12.2 12.6 12.9 11.4 12.9 10.8 12.4 11.3 PREVAIL. SPEED 17.4 14.3 19.4 18.7 19.4 30.0 39.4 47.7 34.7 21.9 14.7 17.4 19.9 PREVAIL. PERCENT 58.1 45.7 26.5 30.0 31.6 22.7 25.8 19.4 32.0 33.5 64.7 61.3 37.5 CALMS PERCENT 155 140 155 150 155 150 155 155 150 155 150 155 1825 WIND OBSER. NO. 1992-2005 180 180 180 180 360 45 45 45 45 180 180 180 45 PREVAIL. DIRECT. 11.3 12.2 13.9 13.7 8.4 12.7 13.1 12.6 10.7 12.5 12.1 10.2 11.1 PREVAIL. SPEED 16.5 15.8 15.9 14.8 16.8 26.8 37.3 38.1 25.8 19.2 16.6 14.2 17.7 PREVAIL. PERCENT MEAN 55.2 44.7 38.0 27.6 25.5 20.5 19.4 18.7 26.6 38.3 52.9 61.1 35.7 CALMS PERCENT MEAN 155.0 141.4 155.0 150.0 155.0 150.0 161.6 161.6 156.4 161.6 156.4 154.8 1858.8 WIND OBSER. NO. =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 35 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M VECTOR WIND DIRECTION , MAGNITUDE (IN KNOTS) AND WIND STEADINESES (%) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 263 227 312 290 345 340 60 62 81 87 198 193 54 VECTOR DIRECT. 0.3 2.3 1.8 1.7 1.5 0.8 5.9 6.4 1.8 1.7 2.2 1.1 0.8 WIND MAGNITUDE 9.1 35.4 43.9 31.5 27.8 10.5 56.2 72.7 25.7 27.0 34.4 32.4 12.9 STEADINESES(%) 1993 227 282 53 265 337 25 66 78 133 145 202 191 93 VECTOR DIRECT. 1.2 1.3 0.4 1.1 1.8 3.8 4.5 4.4 3.6 2.1 2.9 1.2 0.7 WIND MAGNITUDE 32.4 24.1 5.8 12.1 19.4 38.0 53.6 54.3 42.4 35.6 63.0 44.4 10.1 STEADINESES(%) 1994 180 200 253 306 21 53 57 64 61 72 202 217 72 VECTOR DIRECT. 1.0 0.6 0.7 0.7 0.2 3.6 7.7 7.0 4.1 1.0 3.6 2.4 1.4 WIND MAGNITUDE 20.0 10.3 10.3 8.1 2.3 37.5 75.5 71.4 53.9 21.3 60.0 47.1 19.2 STEADINESES(%) 1995 183 196 208 208 360 353 52 77 69 145 188 160 98 VECTOR DIRECT. 1.7 1.2 1.4 1.6 0.6 1.6 5.7 5.9 2.2 1.4 2.4 0.3 0.9 WIND MAGNITUDE 45.9 20.7 22.6 24.2 7.6 25.0 64.8 56.7 31.4 23.3 43.6 18.8 14.3 STEADINESES(%) 1996 174 198 285 299 46 55 58 53 85 162 213 168 71 VECTOR DIRECT. 1.8 2.4 0.9 1.3 1.2 5.7 6.9 5.7 0.7 1.1 0.6 1.7 1.3 WIND MAGNITUDE 54.5 46.2 16.7 15.9 19.7 53.3 73.4 64.0 11.3 23.4 17.1 41.5 20.6 STEADINESES(%) 1997 198 246 219 221 350 21 48 71 51 217 112 145 74 VECTOR DIRECT. 2.4 1.2 2.5 2.7 0.9 2.4 6.9 6.5 1.7 1.5 0.3 0.7 0.7 WIND MAGNITUDE 43.6 19.7 39.7 30.0 10.7 27.9 69.7 61.3 23.0 21.7 7.3 17.1 9.6 STEADINESES(%) 1998 235 198 178 233 31 50 48 47 42 46 171 202 56 VECTOR DIRECT. 0.8 1.1 1.0 1.6 1.0 7.0 6.3 5.3 2.7 0.7 1.7 0.8 1.5 WIND MAGNITUDE 22.9 20.4 13.9 20.0 10.5 64.2 57.3 58.2 35.1 13.5 35.4 26.7 21.1 STEADINESES(%) 1999 163 206 213 266 358 15 37 61 13 50 153 160 36 VECTOR DIRECT. 0.8 2.5 1.0 0.9 3.5 3.1 6.9 7.6 3.7 0.6 0.2 0.8 1.5 WIND MAGNITUDE 28.6 39.1 19.6 11.0 32.7 29.2 62.2 63.9 38.1 7.3 3.3 22.9 19.2 STEADINESES(%) 2000 195 122 188 315 322 41 54 51 47 27 103 229 46 VECTOR DIRECT. 1.2 0.3 1.4 1.3 2.0 5.3 8.1 5.6 3.3 0.2 0.6 0.2 1.7 WIND MAGNITUDE 21.1 6.8 14.7 14.3 24.4 54.1 76.4 56.0 39.3 3.0 15.4 6.5 23.0 STEADINESES(%) 2001 145 180 196 230 234 28 42 58 53 34 208 176 58 VECTOR DIRECT. 1.2 0.8 0.6 1.6 2.4 3.7 6.5 3.6 2.9 0.6 1.4 1.0 0.8 WIND MAGNITUDE 27.9 17.8 8.5 18.0 24.5 40.2 75.6 40.0 37.7 9.4 33.3 47.6 11.8 STEADINESES(%) 2002 211 209 208 235 292 26 47 46 64 139 189 235 66 VECTOR DIRECT. 0.9 2.8 3.3 2.6 1.9 2.6 6.8 5.4 2.1 1.3 1.3 1.0 0.4 WIND MAGNITUDE 30.0 43.7 47.1 37.1 23.7 34.7 80.0 60.7 33.3 22.4 37.1 28.6 6.3 STEADINESES(%) 2003 193 268 200 242 356 9 21 47 43 182 349 215 27 VECTOR DIRECT. 2.6 1.1 1.9 1.8 2.1 3.7 4.4 5.9 3.2 3.1 0.5 0.7 0.7 WIND MAGNITUDE 46.4 19.3 23.2 22.2 26.9 44.0 46.3 61.5 38.6 41.3 12.2 17.9 9.7 STEADINESES(%) 2004 197 194 206 312 293 22 31 41 54 155 200 200 32 VECTOR DIRECT. 0.4 1.7 0.8 1.2 1.5 5.0 4.2 4.9 2.9 0.6 0.8 1.0 1.0 WIND MAGNITUDE 9.3 21.2 11.9 13.3 17.0 52.1 54.5 59.8 43.3 12.0 16.7 41.7 14.7 STEADINESES(%) 2005 211 262 234 322 281 31 35 45 38 176 151 173 36 VECTOR DIRECT. 1.5 0.7 2.6 0.8 1.3 3.4 5.4 6.3 2.8 1.2 0.5 1.6 0.9 WIND MAGNITUDE 36.6 12.5 29.9 9.9 15.1 40.0 64.3 64.9 37.8 16.4 14.7 40.0 12.9 STEADINESES(%) 1992-2005 193 215 219 256 331 32 48 57 56 143 192 191 57 VECTOR DIRECT. 1.2 1.2 1.2 1.2 1.1 3.5 6.1 5.6 2.4 0.8 1.2 0.9 1.0 WIND MAGNITUDE 29.3 20.7 17.6 14.8 13.1 38.5 64.2 58.9 31.6 12.9 26.1 27.3 14.5 STEADINESES(%) =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 36 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF WIND SPEED IN KNOTS YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 3.3 6.5 4.1 5.4 5.4 7.6 10.5 8.8 7.0 6.3 6.4 3.4 6.2 1993 3.7 5.4 6.9 9.1 9.3 10.0 8.4 8.1 8.5 5.9 4.6 2.7 6.9 1994 5.0 5.8 6.8 8.6 8.6 9.6 10.2 9.8 7.6 4.7 6.0 5.1 7.3 1995 3.7 5.8 6.2 6.6 7.9 6.4 8.8 10.4 7.0 6.0 5.5 1.6 6.3 1996 3.3 5.2 5.4 8.2 6.1 10.7 9.4 8.9 6.2 4.7 3.5 4.1 6.3 1997 5.5 6.1 6.3 9.0 8.4 8.6 9.9 10.6 7.4 6.9 4.1 4.1 7.3 1998 3.5 5.4 7.2 8.0 9.5 10.9 11.0 9.1 7.7 5.2 4.8 3.0 7.1 1999 2.8 6.4 5.1 8.2 10.7 10.6 11.1 11.9 9.7 8.2 6.1 3.5 7.8 2000 5.7 4.4 9.5 9.1 8.2 9.8 10.6 10.0 8.4 6.6 3.9 3.1 7.4 2001 4.3 4.5 7.1 8.9 9.8 9.2 8.6 9.0 7.7 6.4 4.2 2.1 6.8 2002 3.0 6.4 7.0 7.0 8.0 7.5 8.5 8.9 6.3 5.8 3.5 3.5 6.3 2003 5.6 5.7 8.2 8.1 7.8 8.4 9.5 9.6 8.3 7.5 4.1 3.9 7.2 2004 4.3 8.0 6.7 9.0 8.8 9.6 7.7 8.2 6.7 5.0 4.8 2.4 6.8 2005 4.1 5.6 8.7 8.1 8.6 8.5 8.4 9.7 7.4 7.3 3.4 4.0 7.0 MEAN 4.1 5.8 6.8 8.1 8.4 9.1 9.5 9.5 7.6 6.2 4.6 3.3 6.9 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 37 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M FASTEST WIND DIRECTION AND SPEED IN KNOTS YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 170 210 290 230 180 200 90 70 180 60 190 210 210 DIRECTION 25 39 21 29 29 27 39 23 19 19 31 23 39 SPEED 16 21 10 22 6 17 20 1 8 27 23 27 DAY 1993 180 200 180 240 230 80 60 60 60 60 210 160 210 DIRECTION 23 23 35 29 31 25 29 21 25 23 43 23 43 SPEED 29 3 8 8 3 25 8 6 3 5 12 27 DAY 1994 170 200 210 240 190 270 60 100 30 180 210 210 210 DIRECTION 47 27 43 39 29 35 25 39 23 21 33 51 51 SPEED 4 1 7 2 5 3 17 27 2 13 5 20 DAY 1995 250 210 320 270 300 180 60 180 210 190 180 330 270 DIRECTION 23 35 37 39 31 27 31 27 27 23 31 16 39 SPEED 12 8 17 21 13 6 28 26 20 22 11 4 DAY 1996 180 240 230 210 210 60 70 60 180 70 180 180 210 DIRECTION 27 29 31 39 39 29 25 23 19 37 16 23 39 SPEED 6 9 26 13 7 23 6 10 2 1 3 25 DAY 1997 210 230 180 240 270 240 60 60 60 260 180 240 240 DIRECTION 33 33 31 37 33 31 25 27 23 23 23 29 37 SPEED 16 22 29 10 19 24 1 7 16 6 5 9 DAY 1998 160 60 300 210 210 60 60 60 30 60 170 170 60 DIRECTION 23 39 29 29 35 39 25 23 23 23 23 23 39 SPEED 14 9 15 20 29 13 1 1 3 9 28 20 DAY 1999 180 180 180 190 200 220 60 40 140 210 190 180 180 DIRECTION 33 25 33 31 27 29 29 23 27 29 29 17 33 SPEED 31 19 26 8 20 13 13 1 11 31 1 31 DAY 2000 180 210 210 240 240 60 60 60 60 180 170 310 210 DIRECTION 23 23 35 29 27 27 35 29 31 29 16 16 35 SPEED 6 27 25 10 1 21 10 29 10 28 4 16 DAY 2001 170 190 180 240 190 170 60 60 60 160 180 150 190 DIRECTION 19 27 39 33 43 21 27 21 21 19 29 19 43 SPEED 29 21 25 12 11 26 10 8 13 15 18 18 DAY 2002 180 240 210 270 210 180 50 40 60 170 170 210 270 DIRECTION 19 29 31 39 27 35 27 23 21 23 17 21 39 SPEED 7 25 22 29 10 5 21 6 9 20 11 26 DAY 2003 170 210 190 180 270 320 80 60 60 180 180 240 190 DIRECTION 29 33 47 29 31 27 27 27 21 25 16 27 47 SPEED 4 20 19 7 28 16 6 28 29 27 1 20 DAY 2004 150 210 170 310 290 30 300 70 60 210 210 210 210 DIRECTION 29 39 23 29 35 29 29 29 23 23 31 19 39 SPEED 13 23 5 17 14 28 10 25 3 22 23 12 DAY 2005 220 180 180 210 300 190 60 60 30 190 180 210 210 DIRECTION 23 27 35 54 31 25 23 25 23 27 19 25 54 SPEED 23 21 31 3 13 22 17 5 18 21 5 23 DAY 1992-2005 170 210 190 210 190 60 90 100 60 70 210 210 210 DIRECTION 47 39 47 54 43 39 39 39 31 37 43 51 54 SPEED 94- 4 92-21 3-19 5- 3 1-11 98-13 92-20 94-27 0-10 96- 1 93-12 94-20 5 YEAR-DAY =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 38 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF CLEAR DAYS (0-2)/8 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 10 20 12 12 10 22 18 26 27 30 13 11 211 1993 15 10 10 7 5 28 28 25 29 19 13 15 204 1994 12 17 14 14 16 28 27 30 27 10 13 20 228 1995 22 13 20 7 13 27 30 30 27 28 23 13 253 1996 14 12 9 14 13 24 24 24 29 29 19 16 227 1997 18 23 13 16 15 16 23 31 29 19 9 17 229 1998 14 12 10 15 19 28 19 22 25 28 17 13 222 1999 10 16 12 14 28 29 27 29 29 25 12 15 246 2000 17 19 22 18 25 28 29 27 23 22 15 14 259 2001 18 19 20 19 21 27 28 29 30 28 20 13 272 2002 15 20 20 10 25 28 30 30 28 27 14 16 263 2003 18 17 21 10 20 27 29 30 30 24 20 18 264 2004 15 19 9 10 23 20 17 23 30 26 15 13 220 2005 17 9 13 17 16 29 23 29 26 27 13 20 239 MEAN 15.4 16.1 14.6 13.1 17.8 25.8 25.1 27.5 27.8 24.4 15.4 15.3 238.3 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 39 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF PARTLY CLOUDY DAYS (3-6)/8 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 14 7 14 14 16 6 13 5 3 1 14 14 121 1993 6 8 14 15 18 2 3 6 1 12 9 11 105 1994 11 9 13 10 13 2 4 1 3 17 9 8 100 1995 7 11 5 12 10 3 1 1 3 3 6 8 70 1996 10 7 9 11 15 6 7 7 1 2 8 14 97 1997 7 4 11 10 13 13 8 0 1 9 15 10 101 1998 12 11 13 11 9 2 12 9 5 2 10 13 109 1999 9 10 11 15 3 1 4 2 1 5 14 13 88 2000 8 7 6 12 6 2 2 4 7 8 7 9 78 2001 7 7 8 10 8 3 3 2 0 3 9 11 71 2002 13 6 7 13 6 2 1 1 2 4 12 8 75 2003 7 9 6 11 11 2 2 1 0 7 7 5 68 2004 10 9 15 13 7 9 14 8 0 5 11 12 113 2005 11 11 13 7 15 1 8 2 4 4 13 7 96 MEAN 9.4 8.3 10.4 11.7 10.7 3.9 5.9 3.5 2.2 5.9 10.3 10.2 92.4 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 40 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF CLOUDY DAYS (7-8)/8 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 7 2 5 4 5 2 0 0 0 0 3 6 34 1993 10 10 7 8 8 0 0 0 0 0 8 5 56 1994 8 2 4 6 2 0 0 0 0 4 8 3 37 1995 2 4 6 11 8 0 0 0 0 0 1 10 42 1996 7 10 13 5 3 0 0 0 0 0 3 1 42 1997 6 1 7 4 3 1 0 0 0 3 6 4 35 1998 5 5 8 4 3 0 0 0 0 1 3 5 34 1999 12 2 8 1 0 0 0 0 0 1 4 3 31 2000 6 3 3 0 0 0 0 0 0 1 8 8 29 2001 6 2 3 1 2 0 0 0 0 0 1 7 22 2002 3 2 4 7 0 0 0 0 0 0 4 7 27 2003 6 2 4 9 0 1 0 0 0 0 3 8 33 2004 6 1 7 7 1 1 0 0 0 0 4 6 33 2005 3 8 5 6 0 0 0 0 0 0 4 4 30 MEAN 6.2 3.9 6.0 5.2 2.5 0.4 0.0 0.0 0.0 0.7 4.3 5.5 34.7 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 41 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M NO. OF DAYS WITH VISIBILITY LESS THAN OR EQUAL 2 KM YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 4 1 0 0 1 0 1 0 0 0 0 1 8 1993 5 2 0 1 0 0 0 0 0 0 4 1 13 1994 2 0 0 1 0 1 0 0 1 0 0 1 6 1995 0 1 1 2 0 0 0 0 1 0 0 2 7 1996 1 2 1 0 0 0 0 0 5 0 0 0 9 1997 0 0 1 0 0 0 0 0 0 0 0 4 5 1998 5 3 1 0 0 0 0 0 0 1 0 0 10 1999 3 1 3 0 0 0 0 0 0 0 2 4 13 2000 2 0 0 0 1 2 0 1 0 2 3 7 18 2001 4 0 0 0 0 0 0 0 0 0 0 0 4 2002 2 1 0 0 0 0 0 0 0 0 0 1 4 2003 2 1 1 0 0 0 0 0 0 0 0 6 10 2004 6 1 0 0 1 0 0 0 0 0 0 5 13 2005 5 2 0 0 1 0 0 0 0 0 0 1 9 MEAN 2.9 1.1 0.6 0.3 0.3 0.2 0.1 0.1 0.5 0.2 0.6 2.4 9.3 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 42 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MONTHLY TOTAL OF SUNSHINE HOURS YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ***** ***** ***** ***** ***** ***** ***** 351.3 316.2 284.0 200.2 157.6 ****** 1993 153.3 166.3 218.3 232.4 270.4 381.2 374.5 350.8 187.7 ***** ***** 159.5 ****** 1994 ***** ***** ***** 139.0 300.1 ***** 332.4 363.0 302.1 238.2 185.0 232.3 ****** 1995 240.6 195.7 260.2 227.9 255.6 355.1 378.4 360.5 310.5 298.7 255.5 166.0 3304.7 1996 183.0 158.2 184.4 273.0 299.4 367.4 369.3 349.9 301.4 295.2 208.1 222.8 3212.1 1997 216.7 262.5 229.1 282.5 316.5 315.1 337.7 368.2 315.9 260.5 178.2 192.5 3275.4 1998 220.8 195.9 228.9 277.4 333.6 377.5 349.9 352.6 293.8 289.1 238.9 197.5 3355.9 1999 162.0 229.0 219.9 276.5 367.3 375.8 364.4 367.9 323.8 281.9 217.2 215.0 3400.7 2000 210.4 241.4 263.2 282.6 354.4 367.6 368.1 350.3 279.9 264.9 187.1 167.7 3337.6 2001 205.1 232.0 262.0 274.2 317.1 370.6 351.4 358.8 307.6 278.8 219.9 163.4 3340.9 2002 201.0 235.6 257.7 222.9 335.3 372.9 363.7 357.3 316.6 278.1 189.9 184.9 3315.9 2003 183.7 211.2 233.1 200.8 304.0 344.7 342.4 366.0 321.7 268.5 224.7 169.7 3170.5 2004 186.6 246.4 209.0 234.5 312.6 341.7 334.8 345.7 317.3 284.7 210.1 186.4 3209.8 2005 220.1 189.0 252.7 265.6 296.3 376.2 341.6 355.4 310.7 283.5 211.4 213.2 3315.7 MEAN 198.6 213.6 234.9 245.3 312.5 362.1 354.5 357.0 300.4 277.4 209.7 187.7 3253.7 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 43 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF QFE PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1993 ****** ****** 874.7 873.4 873.6 870.5 870.0 871.7 873.3 880.2 877.9 879.4 ****** 1994 876.8 873.8 874.1 874.9 873.4 868.1 866.3 868.2 877.0 879.4 876.6 878.2 873.9 1995 878.2 875.4 874.5 873.3 874.9 870.1 865.9 869.6 873.0 877.7 877.4 879.3 874.1 1996 878.3 874.4 872.8 874.3 874.0 870.3 871.5 871.5 872.0 877.4 881.0 879.6 874.8 1997 875.7 875.8 871.8 872.6 874.5 870.5 866.3 870.1 874.6 877.3 879.0 877.1 873.8 1998 875.1 875.6 873.9 874.0 874.2 872.5 868.8 872.1 873.5 878.1 879.1 880.2 874.8 1999 877.5 874.9 873.7 874.1 872.7 869.5 868.5 871.3 872.4 876.8 877.9 881.2 874.2 2000 875.4 875.7 874.0 873.9 871.3 869.3 870.4 871.3 872.4 877.7 879.9 878.0 874.1 2001 878.5 875.7 874.5 873.4 871.3 868.8 868.7 871.7 874.1 877.0 877.7 879.0 874.2 2002 877.3 876.6 874.9 872.3 872.1 870.2 870.1 869.1 874.5 877.4 879.6 877.1 874.3 2003 877.0 873.1 873.7 874.5 874.9 869.5 866.3 871.6 873.8 877.1 879.4 880.0 874.2 2004 874.8 875.8 876.7 873.5 871.8 870.3 870.3 869.6 875.7 879.5 877.5 877.6 874.4 2005 876.1 874.7 873.1 876.0 873.4 870.0 869.0 870.3 872.7 878.3 879.2 879.3 874.3 MEAN 876.7 875.1 874.0 873.9 873.2 870.0 868.6 870.6 873.8 878.0 878.6 878.9 874.3 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 44 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MAX. OF QFE PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1993 ****** ****** 882.2 880.4 880.0 879.2 876.5 876.8 880.4 886.5 884.7 885.8 ****** DAY-HOUR **-** **-** 31- 6 1- 6 9- 6 23- 6 27- 6 31- 6 23- 6 17- 6 21- 6 26- 6 1994 886.2 882.8 880.5 886.0 879.5 874.5 872.1 874.0 885.7 885.6 884.8 885.2 886.2 DAY-HOUR 10- 6 19- 6 18- 6 5- 6 18- 6 9- 6 2- 6 15- 6 23- 6 9- 6 2- 6 8- 3 1995 886.9 881.3 883.7 878.7 880.5 877.7 871.7 875.0 879.9 886.8 884.4 884.1 886.9 DAY-HOUR 7- 6 12- 6 3- 6 7- 6 26- 6 1- 6 4- 3 25- 6 22- 6 25- 6 16- 6 10- 6 1996 885.6 881.4 878.3 880.4 878.6 876.0 877.2 879.8 880.6 886.3 890.9 886.1 890.9 DAY-HOUR 26- 6 13- 6 29- 6 5- 6 7-15 12- 6 4- 3 29- 6 25- 6 2- 6 18- 6 8- 6 1997 883.5 883.1 885.3 879.9 881.1 875.4 871.6 875.2 880.7 883.0 888.9 885.4 888.9 DAY-HOUR 19- 6 17- 6 11- 6 13- 6 12- 6 11- 6 9- 6 25- 6 15- 6 9- 6 8- 6 28- 6 1998 883.4 888.5 881.2 884.6 881.7 878.6 878.6 877.6 878.9 886.2 886.0 887.0 888.5 DAY-HOUR 4- 6 23- 6 28- 6 12- 6 8- 6 17- 6 20- 6 25- 6 13- 6 10- 6 21- 6 9- 6 1999 889.1 882.5 880.6 879.8 880.3 876.1 874.7 878.9 879.6 881.4 885.2 888.2 889.1 DAY-HOUR 2- 6 12- 6 19- 6 11- 6 28- 6 1- 6 19- 6 20- 6 30- 6 27- 6 30- 6 6- 6 2000 883.7 883.3 881.0 880.5 876.7 875.9 878.5 876.8 879.9 883.7 889.0 885.4 889.0 DAY-HOUR 31- 6 11- 6 27- 6 2- 6 7- 6 16- 6 30- 6 23- 6 29- 6 16- 6 17- 6 4- 6 2001 882.4 885.0 883.3 882.0 875.9 876.9 876.2 877.0 881.9 885.3 885.5 884.1 885.5 DAY-HOUR 29- 6 9- 6 1- 6 2- 6 13- 6 2- 6 29- 6 14- 6 22- 6 10- 6 2- 6 9- 6 2002 884.9 886.1 887.3 881.6 878.8 878.0 876.6 876.3 880.6 883.2 888.2 887.8 888.2 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 17- 6 25- 6 30- 6 31- 6 21- 6 10- 6 18- 6 3- 6 2003 883.8 880.6 885.1 881.6 882.8 875.6 874.1 876.5 881.8 883.0 889.8 889.4 889.8 DAY-HOUR 12- 6 6- 6 2- 6 8- 3 2- 6 3- 6 3- 6 30- 6 23- 6 15- 6 25- 6 12- 6 2004 881.6 882.4 885.0 880.0 877.5 878.8 876.9 875.3 882.2 885.2 883.5 888.2 888.2 DAY-HOUR 1- 6 10- 6 9- 6 11- 6 4- 3 6- 6 18- 6 18- 6 30- 6 27- 6 29- 6 3- 6 2005 883.9 883.2 879.1 885.0 879.0 875.8 875.5 875.9 876.8 884.9 883.8 887.2 887.2 DAY-HOUR 9- 6 15- 6 28- 6 6- 6 19- 6 4- 6 28- 6 17- 6 9- 6 24- 6 27- 6 29- 6 1992-2005 889.1 888.5 887.3 886.0 882.8 879.2 878.6 879.8 885.7 886.8 890.9 889.4 890.9 YEAR-DAY 99- 2 98-23 2-11 94- 5 3- 2 93-23 98-20 96-29 94-23 95-25 96-18 3-12 96-18 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 45 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MIN. OF QFE PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1993 ****** ****** 866.9 866.9 867.9 864.4 863.6 864.2 867.2 872.7 867.0 871.3 ****** DAY-HOUR **-** **-** 5-15 12-15 31-12 3-15 12-15 12-15 3-15 2-12 14- 3 5-12 1994 864.4 863.6 863.6 866.0 866.2 861.8 861.0 862.4 868.6 873.0 867.0 863.2 861.0 DAY-HOUR 16-12 1- 6 12-12 2-12 1-12 4-12 20-15 2-15 2-12 2-12 26- 3 3-15 1995 871.1 866.1 865.0 867.6 869.4 861.5 860.1 863.8 867.8 869.3 868.1 874.5 860.1 DAY-HOUR 11-12 23-12 26-12 16-12 10-15 22-12 16-15 22-15 20-12 12-12 25-15 4- 9 1996 869.3 865.2 866.6 866.7 866.0 862.3 863.4 864.6 865.5 868.6 875.0 873.8 862.3 DAY-HOUR 6-12 5- 3 13- 3 18-12 29-15 19-12 7-15 8-15 21-15 27-12 29-12 25-12 1997 865.7 868.7 860.6 864.7 866.3 863.9 860.0 863.0 867.2 872.8 874.0 867.6 860.0 DAY-HOUR 16- 3 22-12 29-12 10-12 4-12 30-15 11-15 5-15 2-15 6-12 19-12 10- 9 1998 863.0 864.8 863.1 865.3 864.0 866.3 860.0 866.7 866.6 869.9 873.4 872.6 860.0 DAY-HOUR 13- 3 15- 9 18-15 23-15 29-15 29-15 8-15 21-15 4-15 1-12 1-12 21- 3 1999 868.0 865.0 866.9 864.3 861.5 860.0 863.0 865.5 865.7 871.8 869.6 872.7 860.0 DAY-HOUR 9-12 20-15 21-12 8-12 20-15 24-15 22-15 14-15 11-15 31-12 26-12 15-15 2000 866.1 864.5 865.0 869.1 864.9 860.9 861.3 862.2 863.1 871.4 873.5 869.0 860.9 DAY-HOUR 21-12 7- 3 24-15 22-12 26-15 24-15 11-15 31-12 1-12 1-12 21-12 15- 9 2001 872.4 861.5 862.6 866.9 863.9 860.9 860.3 864.9 867.2 870.9 864.8 871.3 860.3 DAY-HOUR 19-12 21-12 25-12 12-12 29-15 6-15 9-15 27-12 5-15 1-12 18-12 5-12 2002 868.1 865.6 865.6 860.4 866.7 861.2 862.4 862.4 868.8 871.7 870.5 863.9 860.4 DAY-HOUR 8-12 25-12 28-12 3-12 12-15 20-15 24-15 17-15 10-15 21-15 12-12 21-12 2003 861.4 860.3 859.9 868.1 868.5 860.9 860.8 866.4 867.1 871.5 870.9 869.1 859.9 DAY-HOUR 28-12 20-12 26-12 28-12 23-15 30-15 7-15 1-15 7-12 27-15 14-12 6-12 2004 866.3 865.8 865.7 862.5 859.8 862.7 863.2 862.7 869.1 873.0 865.6 869.6 859.8 DAY-HOUR 23-15 15-12 31-15 17- 3 13-12 17-15 10-12 4-15 11-15 3-12 23-12 15-12 2005 863.2 867.8 861.7 868.5 863.5 860.9 860.0 863.2 866.4 870.3 872.2 867.6 860.0 DAY-HOUR 23- 3 1-15 24-12 3-15 5-15 20-15 6-15 7-15 5-15 4-12 8-12 24- 3 1992-2005 861.4 860.3 859.9 860.4 859.8 860.0 860.0 862.2 863.1 868.6 864.8 863.2 859.8 YEAR-DAY 3-28 3-20 3-26 2- 3 4-13 99-24 97-11 0-31 0- 1 96-27 1-18 94- 3 4-13 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 46 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF QNH PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1993 ****** ****** 1016.5 1015.1 1015.3 1011.7 1011.1 1013.1 1015.0 1022.7 1020.1 1021.9 ****** 1994 1018.9 1015.5 1015.8 1016.7 1015.1 1009.0 1007.0 1009.1 1019.1 1021.8 1018.6 1020.5 1015.6 1995 1020.4 1017.3 1016.3 1015.0 1016.7 1011.3 1006.6 1010.7 1014.6 1019.9 1019.5 1021.6 1015.8 1996 1020.6 1016.2 1014.3 1016.1 1015.7 1011.5 1012.9 1012.9 1013.4 1019.6 1023.6 1022.0 1016.6 1997 1017.6 1017.8 1013.3 1014.2 1016.3 1011.8 1007.1 1011.3 1016.4 1019.5 1021.3 1019.2 1015.5 1998 1017.0 1017.5 1015.6 1015.7 1015.9 1014.0 1009.8 1013.6 1015.1 1020.3 1021.4 1022.8 1016.6 1999 1019.6 1016.7 1015.4 1015.8 1014.3 1010.7 1009.4 1012.7 1013.9 1018.9 1020.1 1023.8 1016.0 2000 1017.3 1017.7 1015.7 1015.6 1012.6 1010.4 1011.6 1012.6 1013.9 1019.9 1022.3 1020.2 1015.8 2001 1020.8 1017.6 1016.3 1015.1 1012.7 1009.8 1009.7 1013.1 1015.8 1019.1 1019.9 1021.4 1015.9 2002 1019.4 1018.7 1016.7 1013.8 1013.6 1011.4 1011.3 1010.2 1016.3 1019.6 1022.0 1019.2 1016.0 2003 1019.1 1014.7 1015.4 1016.3 1016.7 1010.6 1007.0 1013.0 1015.5 1019.2 1021.8 1022.5 1016.0 2004 1016.6 1017.7 1018.8 1015.2 1013.2 1011.5 1011.5 1010.7 1017.6 1021.9 1019.7 1019.8 1016.2 2005 1018.1 1016.5 1014.7 1018.0 1015.0 1011.2 1010.0 1011.5 1014.2 1020.6 1021.6 1021.7 1016.1 MEAN 1018.8 1017.0 1015.8 1015.6 1014.9 1011.2 1009.6 1011.9 1015.5 1020.2 1020.9 1021.3 1016.0 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 47 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MAX. OF QNH PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1993 ****** ****** 1025.0 1022.9 1022.5 1021.6 1018.5 1018.9 1022.9 1029.8 1027.8 1029.0 ****** DAY-HOUR **-** **-** 31- 6 1- 6 9- 6 23- 6 27- 6 31- 6 23- 6 17- 6 21- 6 26- 6 1994 1029.5 1025.7 1023.1 1029.3 1021.9 1016.3 1013.6 1015.7 1028.9 1028.8 1027.9 1028.4 1029.5 DAY-HOUR 10- 6 19- 6 18- 6 5- 6 18- 6 9- 6 2- 6 15- 6 23- 6 9- 6 2- 6 8- 3 1995 1030.3 1024.0 1026.7 1021.0 1023.1 1019.9 1013.1 1016.8 1022.4 1030.2 1027.5 1027.1 1030.3 DAY-HOUR 7- 6 12- 6 3- 6 7- 6 26- 6 1- 6 4- 3 25- 6 22- 6 25- 6 16- 6 10- 6 1996 1028.8 1024.1 1020.6 1022.9 1020.9 1018.0 1019.3 1022.3 1023.2 1029.6 1034.8 1029.4 1034.8 DAY-HOUR 26- 6 13- 6 29- 6 5- 6 7-15 12- 6 4- 3 29- 6 25- 6 2- 6 18- 6 8- 6 1997 1026.4 1026.0 1028.5 1022.4 1023.7 1017.3 1013.0 1017.1 1023.3 1025.9 1032.5 1028.6 1032.5 DAY-HOUR 19- 6 17- 6 11- 6 13- 6 12- 6 11- 6 9- 6 25- 6 15- 6 9- 6 8- 6 28- 6 1998 1026.3 1032.1 1023.9 1027.7 1024.4 1020.9 1020.9 1019.8 1021.3 1029.5 1029.3 1030.4 1032.1 DAY-HOUR 4- 6 23- 6 28- 6 12- 6 8- 6 17- 6 20- 6 25- 6 13- 6 10- 6 21- 6 9- 6 1999 1032.8 1025.3 1023.2 1022.3 1022.8 1018.1 1016.5 1021.3 1022.0 1024.1 1028.4 1031.8 1032.8 DAY-HOUR 2- 6 12- 6 19- 6 11- 6 28- 6 1- 6 19- 6 20- 6 30- 6 27- 6 30- 6 6- 6 2000 1026.7 1026.2 1023.6 1023.1 1018.8 1017.9 1020.8 1018.9 1022.4 1026.7 1032.7 1028.6 1032.7 DAY-HOUR 31- 6 11- 6 27- 6 2- 6 7- 6 16- 6 30- 6 23- 6 29- 6 16- 6 17- 6 4- 6 2001 1025.2 1028.1 1026.2 1024.8 1017.9 1019.0 1018.2 1019.1 1024.6 1028.5 1028.7 1027.1 1028.7 DAY-HOUR 29- 6 9- 6 1- 6 2- 6 13- 6 2- 6 29- 6 14- 6 22- 6 10- 6 2- 6 9- 6 2002 1028.0 1029.4 1030.7 1024.3 1021.1 1020.2 1018.7 1018.3 1023.2 1026.1 1031.8 1031.3 1031.8 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 17- 6 25- 6 30- 6 31- 6 21- 6 10- 6 18- 6 3- 6 2003 1026.8 1023.2 1028.3 1024.3 1025.7 1017.5 1015.8 1018.5 1024.5 1025.9 1033.6 1033.1 1033.6 DAY-HOUR 12- 6 6- 6 2- 6 8- 3 2- 6 3- 6 3- 6 30- 6 23- 6 15- 6 25- 6 12- 6 2004 1024.3 1025.2 1028.1 1022.5 1019.7 1021.1 1019.0 1017.2 1025.0 1028.4 1026.4 1031.8 1031.8 DAY-HOUR 1- 6 10- 6 9- 6 11- 6 4- 3 6- 6 18- 6 18- 6 30- 6 27- 6 29- 6 3- 6 2005 1026.9 1026.1 1021.5 1028.1 1021.4 1017.7 1017.4 1017.9 1018.9 1028.0 1026.8 1030.6 1030.6 DAY-HOUR 9- 6 15- 6 28- 6 6- 6 19- 6 4- 6 28- 6 17- 6 9- 6 24- 6 27- 6 29- 6 1992-2005 1032.8 1032.1 1030.7 1029.3 1025.7 1021.6 1020.9 1022.3 1028.9 1030.2 1034.8 1033.1 1034.8 YEAR-DAY 99- 2 98-23 2-11 94- 5 3- 2 93-23 98-20 96-29 94-23 95-25 96-18 3-12 96-18 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 48 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MIN. OF QNH PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1993 ****** ****** 1007.7 1007.7 1008.8 1004.9 1004.0 1004.6 1008.0 1014.2 1007.8 1012.7 ****** DAY-HOUR **-** **-** 5-15 12-15 31-12 3-15 12-15 12-15 3-15 2-12 14- 3 5-12 1994 1004.9 1004.0 1004.0 1006.7 1006.9 1001.9 1001.0 1002.6 1009.6 1014.6 1007.8 1003.5 1001.0 DAY-HOUR 16-12 1- 6 12-12 2-12 1-12 4-12 20-15 2-15 2-12 2-12 26- 3 3-15 1995 1012.4 1006.8 1005.5 1008.5 1010.5 1001.6 1000.0 1004.2 1008.7 1010.4 1009.0 1016.3 1000.0 DAY-HOUR 11-12 23-12 26-12 16-12 10-15 22-12 16-15 22-15 20-12 12-12 25-15 4- 9 1996 1010.4 1005.8 1007.4 1007.5 1006.7 1002.5 1003.7 1005.1 1006.1 1009.6 1016.8 1015.5 1002.5 DAY-HOUR 6-12 5- 3 13- 3 18-12 29-15 19-12 7-15 8-15 21-15 27-12 29-12 25-12 1997 1006.3 1009.7 1000.6 1005.2 1007.0 1004.3 999.9 1003.3 1008.0 1014.4 1015.7 1008.5 999.9 DAY-HOUR 16- 3 22-12 29-12 10-12 4-12 30-15 11-15 5-15 2-15 6-12 19-12 10- 9 1998 1003.3 1005.3 1003.4 1005.9 1004.4 1007.0 999.9 1007.5 1007.4 1011.1 1015.0 1014.1 999.9 DAY-HOUR 13- 3 15- 9 18-15 23-15 29-15 29-15 8-15 21-15 4-15 1-12 1-12 21- 3 1999 1008.9 1005.5 1007.7 1004.8 1001.6 999.9 1003.3 1006.1 1006.3 1013.2 1010.7 1014.2 999.9 DAY-HOUR 9-12 20-15 21-12 8-12 20-15 24-15 22-15 14-15 11-15 31-12 26-12 15-15 2000 1006.8 1005.0 1005.5 1010.2 1005.4 1000.9 1001.4 1002.4 1003.4 1012.8 1015.1 1010.1 1000.9 DAY-HOUR 21-12 7- 3 24-15 22-12 26-15 24-15 11-15 31-12 1-12 1-12 21-12 15- 9 2001 1013.9 1001.6 1002.8 1007.7 1004.3 1000.9 1000.2 1005.4 1008.0 1012.2 1005.3 1012.7 1000.2 DAY-HOUR 19-12 21-12 25-12 12-12 29-15 6-15 9-15 27-12 5-15 1-12 18-12 5-12 2002 1009.0 1006.2 1006.2 1000.3 1007.5 1001.3 1002.6 1002.6 1009.8 1013.1 1011.8 1004.3 1000.3 DAY-HOUR 8-12 25-12 28-12 3-12 12-15 20-15 24-15 17-15 10-15 21-15 12-12 21-12 2003 1001.5 1000.2 999.8 1009.0 1009.5 1000.9 1000.8 1007.1 1007.9 1012.9 1012.2 1010.2 999.8 DAY-HOUR 28-12 20-12 26-12 28-12 23-15 30-15 7-15 1-15 7-12 27-15 14-12 6-12 2004 1007.0 1006.5 1006.3 1002.7 999.7 1003.0 1003.5 1003.0 1010.2 1014.6 1006.2 1010.7 999.7 DAY-HOUR 23-15 15-12 31-15 17- 3 13-12 17-15 10-12 4-15 11-15 3-12 23-12 15-12 2005 1003.5 1008.7 1001.8 1009.5 1003.9 1000.9 999.9 1003.5 1007.1 1011.5 1013.7 1008.5 999.9 DAY-HOUR 23- 3 1-15 24-12 3-15 5-15 20-15 6-15 7-15 5-15 4-12 8-12 24- 3 1992-2005 1001.5 1000.2 999.8 1000.3 999.7 999.9 999.9 1002.4 1003.4 1009.6 1005.3 1003.5 999.7 YEAR-DAY 3-28 3-20 3-26 2- 3 4-13 99-24 97-11 0-31 0- 1 96-27 1-18 94- 3 4-13 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 49 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF QFF PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1993 ****** ****** 1015.7 1010.0 1007.9 1001.0 999.7 1002.1 1005.0 1018.2 1019.3 1022.7 ****** 1994 1019.9 1016.2 1013.4 1011.2 1007.2 998.1 994.7 997.0 1011.5 1016.9 1015.7 1022.7 1010.4 1995 1021.0 1017.1 1014.0 1009.9 1009.4 1001.1 993.8 998.5 1005.3 1014.7 1016.9 1023.9 1010.5 1996 1024.1 1016.4 1013.8 1011.5 1007.9 1000.7 1001.7 1000.9 1002.8 1013.6 1021.9 1021.4 1011.4 1997 1017.6 1018.5 1011.7 1008.4 1007.7 1000.3 993.6 998.5 1006.7 1012.0 1019.0 1019.3 1009.4 1998 1018.8 1018.0 1012.7 1009.1 1007.4 1002.6 997.2 1001.6 1004.9 1013.9 1017.1 1021.5 1010.4 1999 1020.9 1014.9 1012.9 1009.7 1004.7 998.7 997.5 1000.7 1003.8 1011.6 1017.9 1024.1 1009.8 2000 1018.4 1017.9 1013.0 1008.0 1002.4 998.8 999.6 1000.7 1003.4 1014.0 1021.0 1020.6 1009.8 2001 1022.5 1017.3 1012.1 1007.7 1003.2 998.1 996.7 1000.9 1005.9 1011.9 1016.8 1020.6 1009.5 2002 1020.3 1017.3 1012.9 1008.1 1004.7 1000.1 999.0 997.4 1005.5 1011.6 1019.3 1020.4 1009.7 2003 1019.3 1014.1 1012.9 1010.1 1008.7 998.9 992.9 1001.1 1005.7 1011.1 1019.9 1023.3 1009.8 2004 1016.9 1016.0 1014.7 1009.7 1004.4 999.6 999.4 998.0 1007.8 1015.0 1016.3 1021.2 1009.9 2005 1019.8 1017.1 1010.9 1011.4 1006.5 999.6 996.7 999.3 1003.5 1013.1 1019.4 1020.4 1009.8 MEAN 1020.0 1016.7 1013.1 1009.6 1006.3 999.8 997.1 999.7 1005.5 1013.7 1018.5 1021.7 1010.1 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 50 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MAX. OF QFF PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1993 ****** ****** 1025.4 1020.0 1018.4 1013.1 1007.3 1009.4 1014.9 1026.0 1029.5 1030.0 ****** DAY-HOUR **-** **-** 23- 9 1- 6 9- 6 23- 3 27- 6 25- 6 23- 6 9- 3 30- 6 7- 6 1994 1031.4 1030.7 1022.0 1028.1 1015.8 1006.0 1003.6 1004.2 1023.1 1024.9 1024.6 1036.0 1036.0 DAY-HOUR 10- 3 19- 6 17- 6 5- 9 18- 6 8- 6 2- 6 15- 6 23- 3 10- 3 2- 6 7-15 1995 1030.0 1025.0 1025.9 1018.8 1017.9 1014.8 1001.2 1005.1 1018.4 1027.1 1028.0 1030.0 1030.0 DAY-HOUR 7- 9 12- 6 3- 6 7- 6 29-12 1- 6 4- 3 25- 6 22- 3 26- 6 28- 6 10- 6 1996 1033.0 1025.5 1020.1 1024.0 1016.5 1010.5 1008.3 1012.5 1014.2 1024.2 1035.4 1031.2 1035.4 DAY-HOUR 26- 6 23- 6 29- 3 5- 6 8- 3 28- 3 4- 3 30- 6 25- 6 19- 6 18- 6 4- 6 1997 1027.9 1030.8 1028.5 1021.2 1016.4 1006.4 1001.3 1005.7 1016.4 1019.1 1031.0 1031.2 1031.2 DAY-HOUR 19- 9 7-15 11- 6 12- 6 7- 6 8- 6 9- 6 25- 6 15- 6 9- 6 8- 6 28- 6 1998 1028.7 1035.6 1021.9 1022.2 1019.6 1010.6 1009.9 1012.1 1013.1 1026.2 1024.9 1030.0 1035.6 DAY-HOUR 4- 6 23- 6 4- 6 7- 3 3- 6 17- 6 20- 6 18- 6 13- 6 10- 6 24- 6 29- 6 1999 1036.0 1024.1 1023.9 1018.4 1012.3 1007.5 1006.4 1009.9 1015.0 1021.2 1030.7 1033.2 1036.0 DAY-HOUR 2- 6 12- 6 19- 3 11- 6 2- 6 7- 6 28- 6 20- 3 28- 6 27- 6 30-15 6- 6 2000 1027.9 1028.6 1022.4 1018.3 1009.3 1010.1 1009.3 1008.0 1012.5 1023.7 1032.4 1028.1 1032.4 DAY-HOUR 13- 6 11- 3 4- 3 2- 6 4- 3 14- 3 30- 6 20- 6 26- 3 16- 6 17- 6 4- 6 2001 1035.5 1028.5 1025.7 1017.4 1009.8 1009.2 1006.8 1009.0 1017.9 1022.0 1029.5 1028.5 1035.5 DAY-HOUR 29- 3 9-15 11- 9 2- 3 1- 3 13- 6 29- 3 12- 6 22- 6 10- 6 20- 6 3- 6 2002 1030.9 1029.3 1030.7 1020.5 1012.6 1010.7 1007.9 1007.1 1013.4 1016.7 1031.1 1031.9 1031.9 DAY-HOUR 25- 6 6- 6 11- 6 1- 6 17- 6 25- 6 30- 6 31- 6 21- 6 31- 6 18- 6 3- 6 2003 1027.1 1023.3 1031.5 1018.2 1021.2 1008.2 1002.7 1007.2 1017.4 1018.6 1034.8 1038.2 1038.2 DAY-HOUR 23- 6 6- 6 2- 6 2- 6 2- 6 7- 6 3- 6 30- 6 27- 6 15- 6 25- 6 12- 6 2004 1027.5 1025.4 1025.0 1017.7 1012.3 1011.0 1007.9 1005.9 1017.4 1023.3 1028.4 1034.1 1034.1 DAY-HOUR 1- 3 8- 9 17- 6 8- 6 18- 3 6- 6 18- 3 30- 6 30- 6 27- 6 29- 6 4- 3 2005 1032.5 1029.3 1020.9 1027.2 1013.5 1008.8 1006.5 1006.7 1009.0 1025.1 1026.0 1034.4 1034.4 DAY-HOUR 13- 6 15- 6 27- 6 6- 6 19- 6 10- 6 28- 6 17- 6 28- 6 24- 6 29- 6 31- 6 1992-2005 1036.0 1035.6 1031.5 1028.1 1021.2 1014.8 1009.9 1012.5 1023.1 1027.1 1035.4 1038.2 1038.2 YEAR-DAY 99- 2 98-23 3- 2 94- 5 3- 2 95- 1 98-20 96-30 94-23 95-26 96-18 3-12 3-12 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 51 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MIN. OF QFF PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1993 ****** ****** 1005.2 1000.0 999.1 993.2 991.7 993.2 996.2 1005.2 1003.1 1013.1 ****** DAY-HOUR **-** **-** 5-15 20-15 31-12 15-15 12-12 12-12 3-12 2-12 14- 0 5-12 1994 1004.4 999.8 999.0 1000.0 1000.7 989.4 987.5 989.3 998.7 1006.6 1005.2 1001.6 987.5 DAY-HOUR 16-12 1- 6 7-12 2-12 13-12 4-12 31-12 1-12 2-12 2-12 26- 3 3-15 1995 1011.0 1002.7 999.5 1002.8 1001.3 988.3 985.7 991.2 997.5 1001.4 1004.5 1017.5 985.7 DAY-HOUR 17- 3 5- 6 26-12 16-12 7-12 22-12 16-15 22-15 20-12 12-12 11-12 4- 3 1996 1008.7 999.8 1005.4 999.9 996.2 990.6 991.2 992.1 995.3 1001.2 1012.0 1012.4 990.6 DAY-HOUR 6-12 10-12 26-12 18-12 29-15 19-12 7-12 8-15 18-15 27-12 6- 6 29-15 1997 1002.8 1004.9 996.3 998.4 998.0 992.6 986.3 988.0 995.8 1003.9 1011.5 1003.7 986.3 DAY-HOUR 16- 9 22-15 29-12 10- 9 4-12 30-15 15-15 6-12 2-15 6-12 5-12 10- 9 1998 1004.6 1000.3 996.9 998.7 993.7 994.3 986.3 994.8 995.9 1000.4 1009.1 1011.8 986.3 DAY-HOUR 13- 9 8-12 18-15 21-12 29-15 29-15 8-15 20-15 3-15 1-12 1-12 24-12 1999 1008.0 1000.2 1001.6 997.2 989.4 987.4 989.6 994.2 994.1 1006.4 1004.9 1013.4 987.4 DAY-HOUR 9-12 20-15 21-12 8-12 20-15 24-15 23-15 14-12 11-15 19-12 1- 9 15-12 2000 1005.1 1003.3 998.3 1000.9 993.1 986.7 987.8 989.1 991.5 1003.5 1011.8 1009.9 986.7 DAY-HOUR 21-12 7- 3 24-15 21-12 26-15 24-15 11-15 31-12 1-12 1-12 2-12 11- 9 2001 1014.4 997.8 996.8 998.5 993.2 987.6 900.2 992.2 995.8 1002.0 999.9 1010.3 900.2 DAY-HOUR 19-12 21-12 25-12 26-15 29-15 6-15 12-12 24-12 5-12 1-12 18-12 20-12 2002 1005.5 1000.3 999.3 995.8 995.8 988.9 990.3 989.2 997.4 1005.0 1003.5 1003.8 988.9 DAY-HOUR 8-12 25-12 28-12 3-12 29-15 20-15 24-15 6-12 10-12 21-12 12-12 21-15 2003 999.6 995.7 992.6 999.5 1000.0 987.3 986.8 993.9 996.3 1004.5 1008.1 1008.7 986.8 DAY-HOUR 28-12 20-12 26-12 28-12 23-12 30-12 7-15 1-15 7-12 27-12 14-12 6- 9 2004 1006.6 1000.1 999.2 995.9 989.6 990.8 989.9 988.8 998.2 1005.5 1000.1 1010.4 988.8 DAY-HOUR 23-12 15-12 31-12 17- 3 13-12 17-15 10-12 4-12 11-15 3-12 23-12 15-12 2005 1004.3 1004.5 995.6 999.0 996.4 987.6 985.7 988.8 994.7 1002.1 1008.4 1003.2 985.7 DAY-HOUR 23- 9 1-15 24-12 26-12 4-12 20-15 6-15 7-15 5-15 20-12 6- 3 24- 3 1992-2005 999.6 995.7 992.6 995.8 989.4 986.7 900.2 988.0 991.5 1000.4 999.9 1001.6 900.2 YEAR-DAY 3-28 3-20 3-26 2- 3 99-20 0-24 1-12 97- 6 0- 1 98- 1 1-18 94- 3 1-12 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 52 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M AVERAGE OF COMPUTED QFF PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1993 ****** ****** ****** ****** ****** ****** 998.9 1001.4 1004.4 1017.2 1018.4 ****** ****** 1994 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1995 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1996 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1997 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1998 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1999 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 2000 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 2001 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 2002 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 2003 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 2004 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 2005 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MEAN ****** ****** ****** ****** ****** ****** 998.9 1001.4 1004.4 1017.2 1018.4 ****** 1008.1 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 53 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MAX. OF COMPUTED QFF PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1993 ****** ****** ****** ****** ****** ****** 1006.2 1008.5 1013.9 1024.5 1028.9 ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 27- 6 25- 3 23- 6 17- 6 30- 9 **-** 1994 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1995 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1996 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1997 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1998 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1999 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2000 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2001 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2002 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2003 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2004 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2005 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1992-2005 ****** ****** ****** ****** ****** ****** 1006.2 1008.5 1013.9 1024.5 1028.9 ****** 1028.9 YEAR-DAY **-** **-** **-** **-** **-** **-** 93-27 93-25 93-23 93-17 93-30 **-** 93-30 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION ARDESTAN (40799) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 54 LATITUDE 33 23 N LONGITUDE 52 23 E DATA PROCESSING CENTER ELEVATION 1252.4 M MIN. OF COMPUTED QFF PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1992 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1993 ****** ****** ****** ****** ****** ****** 991.2 992.7 995.7 1004.8 1002.6 ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 12-12 12-12 3-12 2-12 14- 0 **-** 1994 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1995 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1996 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1997 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1998 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 1999 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2000 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2001 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2002 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2003 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2004 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 2005 ****** ****** *****