STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1951 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.5 -2.9 5.4 10.5 14.6 20.3 24.9 23.8 20.7 13.6 6.0 -0.6 11.2 MINIMUN AIR TEMPERATURE (C) -4.8 -6.6 -0.1 3.9 7.5 11.0 15.2 14.4 11.6 8.1 0.9 -4.3 4.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 18 20 6 0 0 0 0 0 0 0 0 17 61 DAYS WITH FREEZING MIN.<= 0 27 28 16 5 0 0 0 0 0 0 15 26 117 TEMPERATURE RECORDS LOWEST(C) -12.0 -16.0 -6.0 -2.0 1.0 6.0 12.0 11.0 8.0 1.0 -3.0 -12.0 -16.0 DAY 11 9 9 1 11 24 1 18 26 21 11 25 MAXIMUM AIR TEMPERATURE (C) 3.7 2.2 11.1 16.9 21.8 28.2 33.2 32.9 29.3 20.0 12.6 3.9 18.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 4 30 30 13 0 0 0 77 DAYS WITH MAXIMUM TEMP. <= 0 6 10 0 0 0 0 0 0 0 0 0 10 26 TEMPERATURE RECORDS HIGHEST(C) 10.0 8.0 17.0 22.0 28.0 30.0 37.0 37.0 33.0 27.0 18.0 13.0 37.0 DAY 1 19 24 18 23 17 24 9 1 1 14 1 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 8.8 11.2 13.0 14.3 17.2 18.0 18.5 17.7 11.9 11.7 8.2 13.3 MEAN DAILY TEMP. (MDT) (C) -0.6 -2.2 5.5 10.4 14.6 19.6 24.2 23.6 20.4 14.0 6.7 -0.2 11.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 2.0 94.0 81.5 20.5 0.0 0.0 0.0 198.0 HEATING DEG. DAYS(BASE 18 0C) 576.0 565.0 387.5 229.0 106.0 1.0 0.0 0.0 5.0 125.5 337.5 564.5 2897.0 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. 52.0 84.0 31.0 69.0 33.5 1.0 0.0 5.0 1.4 15.0 85.0 61.0 437.9 DAYS WITH PRECIPITATION >=10 1 4 0 2 0 0 0 0 0 0 2 2 11 DAYS WITH PRECIPITATION >= 5 5 5 3 5 2 0 0 1 0 2 5 4 32 DAYS WITH PRECIPITATION >= 1 9 9 10 8 9 1 0 1 1 3 6 7 64 DAYS WITH PRECIPITATION 10 10 10 8 10 1 0 3 2 7 6 8 75 GREATEST DAILY PRECIPITATION 16.0 22.0 7.0 24.0 9.0 1.0 0.0 5.0 1.0 8.0 43.0 26.0 43.0 DAY 7 11 7 15 9 1 ** 15 30 14 8 3 DAY WITH THUNDER STORM 0 0 2 8 5 1 0 1 0 1 1 0 19 DAYS WITH SNOW OR SLEET 9 11 4 0 0 0 0 0 0 0 1 6 31 DAYS WITH DUST 0 0 0 0 0 0 0 0 1 2 0 4 7 WIND DIRECTION (PREVAILING) 225 270 225 225 270 225 270 270 270 270 225 225 225 PREVAILING WIND SPEED(KNOTS) 8.3 3.6 6.1 7.3 6.5 4.2 3.8 4.3 4.5 10.4 4.4 7.8 6.4 PREVAILING WIND PERCENT 28.2 21.9 29.8 29.2 26.6 27.1 27.4 27.4 35.0 36.7 27.5 34.3 27.9 CALMS PERCENT OF WIND 13.3 20.1 9.7 8.3 11.7 22.5 16.5 10.9 6.8 6.9 16.3 13.7 13.0 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 234 248 240 248 2914 VECTOR WIND DIRECTION (MEAN) 217 246 242 240 236 232 219 223 244 244 236 241 237 VECTOR WIND MAGNITUDE(KNOTS) 3.7 1.4 3.0 3.3 3.6 1.8 1.9 1.6 3.2 7.4 2.2 3.9 3.0 WIND STEADINESES (MEAN %) 71.2 56.0 71.4 63.5 64.3 64.3 50.0 43.2 80.0 83.1 68.7 81.3 66.7 WIND SPEED (MEAN KNOTS) 5.2 2.5 4.2 5.2 5.6 2.8 3.8 3.7 4.0 8.9 3.2 4.8 4.5 FASTEST WIND DIRECTION 180 230 230 230 270 230 230 90 270 270 270 230 270 FASTEST WIND SPEED (KNOTS) 35 20 25 25 40 20 21 20 24 30 30 26 40 DAY 21 19 10 25 20 2 27 11 15 4 9 16 DAYS WITH SKY CLEAR (0-2)/8 14 7 10 15 8 28 31 29 27 14 14 9 206 DAYS WITH P.CLOUDY (3-6)/8 6 11 15 14 21 2 0 2 3 14 11 12 111 DAYS WITH CLOUDY (7-8)/8 10 10 6 1 2 0 0 0 0 3 5 10 47 DAYS WITH VISIBILITY =< 2 KM 10 7 4 6 0 0 0 0 1 0 3 7 38 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1951 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 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1951 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 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1951 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 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1952 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.9 2.6 5.4 11.0 15.2 20.0 23.8 22.9 19.7 14.4 4.2 2.5 11.5 MINIMUN AIR TEMPERATURE (C) -8.6 -1.5 ***** 5.6 9.0 ***** 16.5 13.4 11.0 6.1 -1.2 -1.8 ***** DAYS WITH MINIMUM TEMP. >=21 0 0 **** 0 0 **** 1 0 0 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 27 11 **** 0 0 **** 0 0 0 0 10 6 **** DAYS WITH FREEZING MIN.<= 0 30 18 **** 3 0 **** 0 0 0 0 16 28 **** TEMPERATURE RECORDS LOWEST(C) -19.0 -8.0 ***** -1.0 1.0 ***** 13.0 9.0 8.0 1.0 -14.0 -7.0 ***** DAY 6 13 ** 18 12 ** 16 24 11 24 20 18 MAXIMUM AIR TEMPERATURE (C) 1.9 7.5 10.9 16.6 21.7 27.6 31.8 31.7 28.4 23.2 10.5 8.7 18.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 24 30 8 0 0 0 65 DAYS WITH MAXIMUM TEMP. <= 0 7 1 0 0 0 0 0 0 0 0 4 1 13 TEMPERATURE RECORDS HIGHEST(C) 9.0 13.0 22.0 26.0 28.0 34.0 34.0 34.0 32.0 29.0 21.0 17.0 34.0 DAY 22 8 31 7 27 30 1 9 1 8 3 11 DIF. BETWEEN (MAX.-MIN.) (C) 10.5 9.0 ***** 11.0 12.7 ***** 15.3 18.3 17.4 17.1 11.7 10.5 ***** MEAN DAILY TEMP. (MDT) (C) -3.3 3.0 ***** 11.1 15.3 ***** 24.2 22.6 19.7 14.6 4.6 3.5 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.0 98.5 46.0 13.0 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 661.5 435.5 0.0 209.0 93.5 0.0 0.0 0.0 5.0 105.5 400.5 451.0 ****** DEWPOINT (MEAN C) ***** ***** ***** ***** ***** ***** ***** 6.2 6.2 0.5 -4.4 -2.5 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** ****** ****** 7.51 7.42 5.03 3.52 3.98 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** ****** ****** 9.68 9.60 6.53 4.58 5.17 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** ****** ****** 19.58 14.62 10.84 4.70 2.45 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** *** 37 44 41 60 72 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** *** *** 55 64 59 74 85 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** *** *** 21 28 23 43 55 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** *** 51 60 57 67 80 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** *** 26 30 27 50 65 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** *** *** 27 35 36 56 69 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.8 72.1 67.4 107.0 63.0 0.0 0.0 0.0 6.0 0.0 14.0 14.4 376.7 DAYS WITH PRECIPITATION >=10 1 3 2 5 3 0 0 0 0 0 0 0 14 DAYS WITH PRECIPITATION >= 5 3 6 4 6 5 0 0 0 1 0 2 1 28 DAYS WITH PRECIPITATION >= 1 4 8 9 10 6 0 0 0 1 0 2 5 45 DAYS WITH PRECIPITATION 6 10 11 13 9 0 0 0 4 0 2 6 61 GREATEST DAILY PRECIPITATION 14.0 20.0 27.0 29.0 17.0 0.0 0.0 0.0 6.0 0.0 8.0 6.0 29.0 DAY 10 23 1 22 7 ** ** ** 9 ** 18 12 DAY WITH THUNDER STORM 0 0 1 2 5 0 0 0 3 0 1 0 12 DAYS WITH SNOW OR SLEET 7 2 5 1 0 0 0 0 0 0 6 2 23 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 225 225 225 225 225 225 225 225 225 225 270 225 225 PREVAILING WIND SPEED(KNOTS) 3.3 12.2 12.0 8.3 5.5 4.4 3.6 3.1 3.0 4.2 5.8 3.8 6.2 PREVAILING WIND PERCENT 22.6 45.3 56.5 40.0 44.3 45.8 33.9 36.3 42.1 37.1 25.8 27.0 37.8 CALMS PERCENT OF WIND 27.4 6.5 6.9 10.0 6.1 10.5 15.3 15.7 6.3 13.3 24.2 33.9 14.7 NO. OF WIND OBSERVATION 248 232 248 240 246 238 248 248 240 248 240 248 2924 VECTOR WIND DIRECTION (MEAN) 248 228 232 235 238 239 221 220 240 242 239 244 234 VECTOR WIND MAGNITUDE(KNOTS) 1.5 7.1 8.2 4.8 4.1 3.3 2.0 1.6 2.0 2.7 2.6 1.7 3.4 WIND STEADINESES (MEAN %) 60.0 81.6 89.1 77.4 77.4 82.5 64.5 59.3 71.4 77.1 72.2 73.9 75.6 WIND SPEED (MEAN KNOTS) 2.5 8.7 9.2 6.2 5.3 4.0 3.1 2.7 2.8 3.5 3.6 2.3 4.5 FASTEST WIND DIRECTION 180 230 230 230 270 230 50 90 270 220 230 230 230 FASTEST WIND SPEED (KNOTS) 15 25 34 30 24 20 15 25 15 30 20 20 34 DAY 11 3 3 11 5 5 8 16 2 14 4 10 DAYS WITH SKY CLEAR (0-2)/8 14 13 9 11 16 30 22 26 27 29 17 16 230 DAYS WITH P.CLOUDY (3-6)/8 8 8 13 9 12 0 8 5 2 2 8 9 84 DAYS WITH CLOUDY (7-8)/8 9 8 9 10 3 0 1 0 1 0 5 5 51 DAYS WITH VISIBILITY =< 2 KM 10 8 5 4 1 1 1 0 0 3 7 6 46 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1952 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 811.8 814.6 814.4 813.6 814.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 819.2 818.2 818.5 816.4 819.7 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 3- 9 29- 9 2- 6 19- 9 29-18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.3 811.6 810.9 810.8 810.7 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 19-15 9- 3 24- 6 4- 0 10-12 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 995.0 998.3 998.0 997.0 997.7 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.7 1002.5 1002.9 1000.4 1004.3 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 3- 9 29- 9 2- 6 19- 9 29-18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 990.8 994.7 993.9 993.8 993.7 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 19-15 9- 3 24- 6 4- 0 10-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 981.1 986.4 989.8 996.1 997.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 988.7 992.1 995.8 1008.2 1006.0 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 3- 9 13- 6 17- 3 20- 6 29-18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 975.1 979.7 985.6 984.8 989.3 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 2- 9 2- 0 10-21 4- 0 10-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 811.6 814.3 814.4 813.4 814.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 813.9 817.0 817.6 815.5 816.0 ****** DAY ** ** ** ** ** ** ** 21 29 2 19 25 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.9 811.8 813.1 810.8 811.0 ****** DAY ** ** ** ** ** ** ** 2 9 7 4 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 994.7 997.9 998.1 996.8 997.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.4 1001.1 1001.8 999.3 999.9 ****** DAY ** ** ** ** ** ** ** 21 29 2 19 25 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 991.5 995.0 996.5 993.8 994.0 ****** DAY ** ** ** ** ** ** ** 2 9 7 4 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 980.6 985.9 989.3 995.2 997.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 984.4 990.0 992.8 1006.2 1003.8 ****** DAY ** ** ** ** ** ** ** 24 13 31 20 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 975.8 979.7 986.4 984.8 990.3 ****** DAY ** ** ** ** ** ** ** 2 2 9 4 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 811.8 814.4 814.6 813.4 814.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 814.0 816.9 818.2 815.4 816.2 ****** DAY ** ** ** ** ** ** ** 21 29 17 19 25 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 809.5 811.6 812.8 811.2 811.2 ****** DAY ** ** ** ** ** ** ** 2 9 7 4 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 994.9 998.0 998.3 996.8 997.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.6 1001.0 1002.5 999.2 1000.2 ****** DAY ** ** ** ** ** ** ** 21 29 17 19 25 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 992.2 994.7 996.1 994.3 994.3 ****** DAY ** ** ** ** ** ** ** 2 9 7 4 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 981.9 986.9 991.3 996.6 998.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 985.1 991.0 995.8 1006.9 1001.9 ****** DAY ** ** ** ** ** ** ** 24 13 17 20 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 978.3 981.3 987.6 986.6 992.2 ****** DAY ** ** ** ** ** ** ** 2 2 7 4 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1952 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 812.9 815.4 815.1 813.8 814.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 814.5 817.4 818.5 815.7 816.4 ****** DAY ** ** ** ** ** ** ** 26 26 2 19 25 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 809.2 812.2 810.9 811.7 811.2 ****** DAY ** ** ** ** ** ** ** 2 9 24 4 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.2 999.2 998.8 997.4 998.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.1 1001.6 1002.9 999.6 1000.4 ****** DAY ** ** ** ** ** ** ** 26 26 2 19 25 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 991.9 995.4 993.9 994.8 994.3 ****** DAY ** ** ** ** ** ** ** 2 9 24 4 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 982.5 987.5 991.1 996.8 998.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 985.8 992.1 994.5 1008.2 1004.3 ****** DAY ** ** ** ** ** ** ** 24 13 31 20 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 977.7 981.1 987.5 987.0 992.1 ****** DAY ** ** ** ** ** ** ** 2 2 15 4 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 812.3 815.2 814.7 813.8 814.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 819.2 818.2 818.5 816.4 816.6 ****** DAY ** ** ** ** ** ** ** 3 29 2 19 24 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.5 812.7 813.1 812.3 811.4 ****** DAY ** ** ** ** ** ** ** 2 9 21 20 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 995.6 999.0 998.4 997.4 997.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.7 1002.5 1002.9 1000.4 1000.6 ****** DAY ** ** ** ** ** ** ** 3 29 2 19 24 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 991.1 996.0 996.5 995.5 994.5 ****** DAY ** ** ** ** ** ** ** 2 9 21 20 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 980.7 986.0 988.9 995.8 997.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 988.7 990.0 992.3 1007.7 1002.5 ****** DAY ** ** ** ** ** ** ** 3 29 31 19 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 975.1 980.9 986.1 987.1 991.0 ****** DAY ** ** ** ** ** ** ** 2 2 6 4 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 811.6 814.6 814.0 813.5 813.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 813.8 817.0 817.0 814.8 816.5 ****** DAY ** ** ** ** ** ** ** 18 26 1 23 24 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.4 812.3 812.9 812.0 810.7 ****** DAY ** ** ** ** ** ** ** 6 5 27 3 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 994.7 998.2 997.5 996.9 997.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.3 1001.1 1001.1 998.5 1000.5 ****** DAY ** ** ** ** ** ** ** 18 26 1 23 24 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 990.9 995.5 996.3 995.2 993.7 ****** DAY ** ** ** ** ** ** ** 6 5 27 3 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 980.4 986.1 988.8 995.3 996.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 984.4 990.3 992.0 1005.0 1002.8 ****** DAY ** ** ** ** ** ** ** 18 26 23 20 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 976.7 981.1 985.9 988.3 990.2 ****** DAY ** ** ** ** ** ** ** 8 2 8 3 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1952 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 811.2 814.3 814.1 813.5 814.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 813.6 816.5 816.3 815.0 819.5 ****** DAY ** ** ** ** ** ** ** 18 28 1 23 25 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.3 812.2 812.6 811.4 811.3 ****** DAY ** ** ** ** ** ** ** 19 5 13 3 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 994.3 997.9 997.6 997.0 997.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.1 1000.5 1000.3 998.7 1004.0 ****** DAY ** ** ** ** ** ** ** 18 28 1 23 25 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 990.8 995.4 995.9 994.5 994.4 ****** DAY ** ** ** ** ** ** ** 19 5 13 3 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 981.1 986.8 990.6 996.8 998.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 984.6 990.4 994.8 1006.5 1004.5 ****** DAY ** ** ** ** ** ** ** 18 9 24 19 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 977.9 981.7 987.2 988.8 992.0 ****** DAY ** ** ** ** ** ** ** 19 2 13 4 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 811.8 814.5 814.2 813.6 814.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 814.1 817.2 817.8 815.4 819.7 ****** DAY ** ** ** ** ** ** ** 5 28 16 18 29 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.4 812.0 812.9 811.6 811.6 ****** DAY ** ** ** ** ** ** ** 6 5 17 3 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 995.0 998.1 997.8 997.1 997.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.7 1001.3 1002.0 999.2 1004.3 ****** DAY ** ** ** ** ** ** ** 5 28 16 18 29 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 990.9 995.2 996.3 994.7 994.7 ****** DAY ** ** ** ** ** ** ** 6 5 17 3 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 981.4 986.5 990.3 996.5 998.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 985.2 990.3 994.8 1006.7 1006.0 ****** DAY ** ** ** ** ** ** ** 24 12 16 19 29 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 977.0 981.7 986.0 987.7 990.1 ****** DAY ** ** ** ** ** ** ** 6 1 6 4 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 811.7 814.5 814.4 813.6 814.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 813.8 817.6 817.9 815.6 816.4 ****** DAY ** ** ** ** ** ** ** 20 28 16 18 24 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.6 812.0 813.1 811.3 811.8 ****** DAY ** ** ** ** ** ** ** 6 8 11 3 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 994.9 998.2 998.0 997.1 997.7 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.3 1001.8 1002.2 999.4 1000.4 ****** DAY ** ** ** ** ** ** ** 20 28 16 18 24 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 991.2 995.2 996.5 994.4 995.0 ****** DAY ** ** ** ** ** ** ** 6 8 11 3 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 980.1 985.3 988.7 995.6 997.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 983.8 989.3 992.6 1006.5 1003.1 ****** DAY ** ** ** ** ** ** ** 23 28 16 19 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 975.5 980.4 985.6 985.8 989.3 ****** DAY ** ** ** ** ** ** ** 1 1 10 3 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1953 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.4 2.8 3.0 10.8 15.3 20.5 24.5 24.0 20.9 12.8 4.0 -3.0 11.5 MINIMUN AIR TEMPERATURE (C) -1.7 -1.4 -1.1 ***** 10.2 14.3 ***** ***** ***** ***** ***** ***** ***** DAYS WITH MINIMUM TEMP. >=21 0 0 0 **** 0 0 **** **** **** **** **** **** **** DAYS WITH MINIMUM TEMP. <=-4 8 5 6 **** 0 0 **** **** **** **** **** **** **** DAYS WITH FREEZING MIN.<= 0 23 22 23 **** 0 0 **** **** **** **** **** **** **** TEMPERATURE RECORDS LOWEST(C) -5.0 -6.0 -6.0 ***** 7.0 9.0 ***** ***** ***** ***** ***** ***** ***** DAY 14 13 9 ** 3 1 ** ** ** ** ** ** MAXIMUM AIR TEMPERATURE (C) 8.3 8.3 8.5 16.7 21.1 27.1 32.1 32.1 29.4 20.7 9.3 1.9 18.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 8 26 26 16 0 0 0 76 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 10 10 TEMPERATURE RECORDS HIGHEST(C) 13.0 15.0 15.0 21.0 25.0 31.0 36.0 35.0 34.0 28.0 16.0 7.0 36.0 DAY 2 16 1 15 18 27 15 13 1 6 2 2 DIF. BETWEEN (MAX.-MIN.) (C) 10.0 9.7 9.6 ***** 10.9 12.8 ***** ***** ***** ***** ***** ***** ***** MEAN DAILY TEMP. (MDT) (C) 3.3 3.5 3.7 ***** 15.6 20.7 ***** ***** ***** ***** ***** ***** ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 22.5 0.0 0.0 0.0 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 455.0 406.5 442.0 96.5 75.0 6.0 0.0 0.0 0.0 0.0 0.0 0.0 ****** DEWPOINT (MEAN C) -3.5 -4.4 -3.0 0.9 2.5 4.7 5.9 6.4 2.6 1.1 -1.7 -5.5 0.5 MIXING RATIO (G/KG) 3.69 3.45 3.84 5.14 5.83 6.69 7.39 7.62 5.72 5.14 4.25 3.26 5.17 VAPOUR PRESSURE (HPA) 4.80 4.48 4.98 6.67 7.55 8.64 9.53 9.83 7.44 6.70 5.53 4.25 6.70 SATURATION DEF. (HPA) 2.68 3.19 2.88 6.79 10.30 16.42 22.39 21.21 18.64 9.52 2.88 0.90 9.82 RELATIVE HUMIDITY (MEAN %) 67 62 67 54 45 37 33 35 32 50 69 84 53 RELATIVE HUMIDITY (MAX. %) 82 78 83 72 64 52 47 51 50 69 86 92 69 RELATIVE HUMIDITY (MIN. %) 50 45 50 35 30 26 21 21 19 32 48 71 37 RELATIVE HUMIDITY (MEAN% 03UTC) 76 71 73 64 54 47 44 48 46 64 78 87 63 RELATIVE HUMIDITY (MEAN% 09UTC) 59 54 62 42 39 31 29 28 22 39 58 80 45 RELATIVE HUMIDITY (MEAN% 15UTC) 62 58 62 48 39 29 24 24 23 43 66 84 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 20.0 80.0 64.6 65.0 44.0 1.0 0.0 0.0 0.0 19.1 102.0 44.0 439.7 DAYS WITH PRECIPITATION >=10 0 2 2 1 1 0 0 0 0 0 5 1 12 DAYS WITH PRECIPITATION >= 5 1 6 4 6 3 0 0 0 0 3 8 3 34 DAYS WITH PRECIPITATION >= 1 6 7 8 11 10 1 0 0 0 4 11 9 67 DAYS WITH PRECIPITATION 6 7 12 11 10 1 0 1 0 6 12 11 77 GREATEST DAILY PRECIPITATION 5.0 27.0 20.0 18.0 12.0 1.0 0.0 0.0 0.0 5.6 18.0 16.0 27.0 DAY 11 2 2 2 7 5 ** ** ** 25 17 4 DAY WITH THUNDER STORM 0 0 1 3 2 1 0 0 0 0 2 0 9 DAYS WITH SNOW OR SLEET 5 6 6 0 0 0 0 0 0 0 3 11 31 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 270 225 225 225 270 225 225 225 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 6.6 9.7 9.8 8.3 6.2 3.4 4.4 4.6 4.1 6.0 9.7 4.9 6.5 PREVAILING WIND PERCENT 27.4 34.1 41.9 37.2 38.8 38.0 36.7 38.1 39.1 48.0 38.5 18.5 35.8 CALMS PERCENT OF WIND 29.0 27.8 20.7 11.7 8.6 15.0 10.1 8.1 10.5 5.6 10.9 49.2 17.3 NO. OF WIND OBSERVATION 248 223 246 239 245 234 248 247 238 248 239 248 2903 VECTOR WIND DIRECTION (MEAN) 246 233 234 240 246 244 237 224 234 235 234 239 237 VECTOR WIND MAGNITUDE(KNOTS) 3.6 4.2 5.2 5.1 3.9 2.5 2.7 2.8 2.9 4.0 5.8 1.8 3.7 WIND STEADINESES (MEAN %) 80.0 72.4 88.1 83.6 76.5 80.6 77.1 66.7 70.7 83.3 80.6 78.3 78.7 WIND SPEED (MEAN KNOTS) 4.5 5.8 5.9 6.1 5.1 3.1 3.5 4.2 4.1 4.8 7.2 2.3 4.7 FASTEST WIND DIRECTION 230 270 230 230 230 270 230 230 270 230 230 270 270 FASTEST WIND SPEED (KNOTS) 30 35 35 30 30 20 20 20 20 30 30 25 35 DAY 22 25 5 21 4 8 20 5 9 22 29 27 DAYS WITH SKY CLEAR (0-2)/8 14 11 10 11 13 25 27 27 28 20 10 8 204 DAYS WITH P.CLOUDY (3-6)/8 9 10 16 15 13 5 4 4 2 7 13 5 103 DAYS WITH CLOUDY (7-8)/8 8 7 5 4 5 0 0 0 0 4 7 18 58 DAYS WITH VISIBILITY =< 2 KM 0 4 1 1 0 1 0 1 0 0 2 9 19 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1953 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 813.5 813.4 811.6 814.0 814.0 813.1 812.6 812.7 815.6 817.9 814.7 814.7 814.0 MAX. QFE PRESSURE IN HPA 815.9 818.7 819.6 819.5 816.3 815.9 824.3 817.8 820.2 823.9 819.5 819.7 824.3 DAY-HOUR 18- 6 26- 9 9- 6 4- 6 25- 0 17- 6 17- 6 31- 9 30-21 12- 6 14- 6 2- 3 MIN. QFE PRESSURE IN HPA 810.2 810.4 805.7 808.2 808.0 810.4 807.4 809.0 812.0 811.7 808.2 808.8 805.7 DAY-HOUR 16-12 17-18 13- 9 20-15 7-12 24-15 28-15 4-12 20- 9 23-12 19-12 21-12 MEAN QNH PRESSURE IN HPA 997.0 996.9 994.7 997.5 997.5 996.5 995.9 996.0 999.5 1002.1 998.4 998.3 997.5 MAX. QNH PRESSURE IN HPA 999.8 1003.1 1004.2 1004.0 1000.3 999.8 1009.7 1002.0 1004.9 1009.2 1004.0 1004.3 1009.7 DAY-HOUR 18- 6 26- 9 9- 6 4- 6 25- 0 17- 6 17- 6 31- 9 30-21 12- 6 14- 6 2- 3 MIN. QNH PRESSURE IN HPA 993.1 993.3 987.8 990.7 990.5 993.3 989.8 991.7 995.2 994.8 990.7 991.4 987.8 DAY-HOUR 16-12 17-18 13- 9 20-15 7-12 24-15 28-15 4-12 20- 9 23-12 19-12 21-12 MEAN QFF PRESSURE IN HPA 997.2 996.8 994.4 991.8 988.7 984.3 981.0 981.4 987.1 995.0 997.4 1002.7 991.5 MAX. QFF PRESSURE IN HPA 1003.6 1005.8 1006.5 999.5 992.6 990.6 994.0 986.8 994.2 1007.2 1005.1 1014.1 1014.1 DAY-HOUR 18- 6 26- 6 9- 6 4- 6 31- 0 1- 3 17- 6 31-15 30-15 26- 3 30- 6 24- 6 MIN. QFF PRESSURE IN HPA 990.6 990.1 985.9 984.5 982.3 979.3 975.7 976.4 981.5 988.2 988.7 994.1 975.7 DAY-HOUR 23- 9 17-18 12-18 20-21 7-12 24-18 28-12 24-12 2-12 3-12 19-12 27-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 813.6 813.3 811.3 813.9 814.1 813.4 812.7 812.7 815.7 817.9 814.7 814.8 814.0 MAX. QFE PRESSURE IN HPA 815.4 816.2 818.2 816.4 816.3 815.2 816.4 816.2 818.5 822.0 818.7 819.5 822.0 DAY 19 15 11 6 25 17 19 31 20 12 14 2 MIN. QFE PRESSURE IN HPA 811.5 811.0 806.5 808.9 810.2 811.6 810.3 810.4 814.0 812.2 808.9 809.8 806.5 DAY 23 24 13 21 8 15 6 24 10 31 20 21 MEAN QNH PRESSURE IN HPA 997.1 996.8 994.3 997.4 997.6 996.9 996.0 996.0 999.6 1002.2 998.4 998.5 997.6 MAX. QNH PRESSURE IN HPA 999.2 1000.2 1002.5 1000.4 1000.3 999.0 1000.4 1000.2 1002.9 1007.0 1003.1 1004.0 1007.0 DAY 19 15 11 6 25 17 19 31 20 12 14 2 MIN. QNH PRESSURE IN HPA 994.6 994.0 988.7 991.5 993.1 994.7 993.2 993.3 997.6 995.4 991.5 992.6 988.7 DAY 23 24 13 21 8 15 6 24 10 31 20 21 MEAN QFF PRESSURE IN HPA 996.6 996.1 993.7 991.7 988.7 984.6 980.8 981.0 986.6 994.3 996.7 1002.1 991.1 MAX. QFF PRESSURE IN HPA 1001.7 1000.7 1001.6 995.7 992.6 989.9 984.2 984.4 991.6 1003.9 1002.4 1007.6 1007.6 DAY 18 26 10 2 31 1 20 31 27 27 30 11 MIN. QFF PRESSURE IN HPA 992.5 992.1 987.2 984.9 985.2 980.2 976.8 977.5 982.3 989.4 989.9 995.5 976.8 DAY 22 18 13 21 8 29 12 24 3 4 20 28 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 813.5 813.4 811.5 813.9 814.1 813.5 813.1 812.9 816.1 818.1 814.7 814.7 814.1 MAX. QFE PRESSURE IN HPA 815.5 816.5 818.0 816.9 816.1 815.4 816.2 816.4 819.3 822.4 818.6 819.7 822.4 DAY 18 15 11 6 2 6 19 31 20 2 14 2 MIN. QFE PRESSURE IN HPA 811.4 810.9 806.2 809.1 810.9 811.6 810.8 810.7 814.1 812.5 809.2 809.3 806.2 DAY 16 24 13 21 8 30 12 24 10 31 20 21 MEAN QNH PRESSURE IN HPA 997.0 996.9 994.6 997.5 997.7 996.9 996.5 996.2 1000.0 1002.4 998.4 998.4 997.7 MAX. QNH PRESSURE IN HPA 999.3 1000.5 1002.3 1001.0 1000.0 999.2 1000.2 1000.4 1003.8 1007.5 1003.0 1004.3 1007.5 DAY 18 15 11 6 2 6 19 31 20 2 14 2 MIN. QNH PRESSURE IN HPA 994.5 993.9 988.4 991.8 993.9 994.7 993.8 993.7 997.7 995.8 991.9 992.0 988.4 DAY 16 24 13 21 8 30 12 24 10 31 20 21 MEAN QFF PRESSURE IN HPA 997.9 997.5 994.9 992.5 989.6 985.6 982.4 982.5 988.7 996.4 998.3 1003.7 992.5 MAX. QFF PRESSURE IN HPA 1003.3 1003.6 1003.3 997.4 992.5 990.6 986.4 986.1 993.7 1007.2 1004.8 1011.2 1011.2 DAY 18 26 10 6 31 1 18 31 27 26 30 24 MIN. QFF PRESSURE IN HPA 993.1 993.9 987.8 986.4 986.3 981.4 979.0 979.0 983.8 990.6 990.8 994.6 979.0 DAY 23 10 21 21 8 30 12 24 2 23 20 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1953 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 813.8 813.9 812.2 814.6 814.5 813.7 813.9 813.5 816.7 818.8 815.5 815.1 814.7 MAX. QFE PRESSURE IN HPA 815.9 818.4 819.6 819.5 816.3 815.9 824.3 817.2 819.9 823.9 819.5 819.7 824.3 DAY 18 26 9 4 25 17 17 31 20 12 14 2 MIN. QFE PRESSURE IN HPA 810.7 811.2 806.3 809.9 812.0 812.0 810.9 810.5 814.0 813.3 810.6 809.6 806.3 DAY 23 23 13 21 8 30 2 24 25 30 20 20 MEAN QNH PRESSURE IN HPA 997.3 997.4 995.5 998.3 998.1 997.2 997.4 997.0 1000.8 1003.2 999.3 998.8 998.4 MAX. QNH PRESSURE IN HPA 999.8 1002.7 1004.2 1004.0 1000.3 999.8 1009.7 1001.3 1004.5 1009.2 1004.0 1004.3 1009.7 DAY 18 26 9 4 25 17 17 31 20 12 14 2 MIN. QNH PRESSURE IN HPA 993.7 994.3 988.5 992.7 995.2 995.2 993.9 993.4 997.6 996.7 993.5 992.4 988.5 DAY 23 23 13 21 8 30 2 24 25 30 20 20 MEAN QFF PRESSURE IN HPA 998.1 997.8 995.5 992.6 989.1 984.7 982.5 982.6 988.6 996.5 998.7 1003.6 992.5 MAX. QFF PRESSURE IN HPA 1003.6 1005.8 1006.5 999.5 991.9 990.1 994.0 986.2 993.9 1006.3 1005.1 1014.1 1014.1 DAY 18 26 9 4 1 1 17 30 28 26 30 24 MIN. QFF PRESSURE IN HPA 991.0 994.1 987.9 986.5 986.5 980.0 978.1 978.8 983.6 991.1 992.7 995.6 978.1 DAY 23 17 13 21 21 30 11 24 10 23 20 28 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 813.6 813.7 812.1 814.3 814.3 813.3 813.2 813.3 815.9 818.2 815.1 814.8 814.3 MAX. QFE PRESSURE IN HPA 815.4 818.7 818.5 817.0 816.1 815.5 817.3 817.8 819.0 822.9 819.2 819.6 822.9 DAY 18 26 10 4 11 17 18 31 30 12 14 5 MIN. QFE PRESSURE IN HPA 810.2 811.2 805.7 810.6 812.2 811.1 810.6 810.3 812.0 812.1 811.3 809.1 805.7 DAY 23 23 13 10 7 30 24 24 20 30 26 21 MEAN QNH PRESSURE IN HPA 997.1 997.2 995.3 997.9 997.9 996.7 996.6 996.7 999.7 1002.5 998.9 998.5 997.9 MAX. QNH PRESSURE IN HPA 999.2 1003.1 1002.9 1001.1 1000.0 999.3 1001.4 1002.0 1003.5 1008.0 1003.7 1004.2 1008.0 DAY 18 26 10 4 11 17 18 31 30 12 14 5 MIN. QNH PRESSURE IN HPA 993.1 994.3 987.8 993.5 995.4 994.1 993.5 993.2 995.2 995.3 994.4 991.8 987.8 DAY 23 23 13 10 7 30 24 24 20 30 26 21 MEAN QFF PRESSURE IN HPA 997.0 996.7 994.6 991.5 988.2 984.3 981.0 981.3 986.5 994.6 997.3 1002.3 991.3 MAX. QFF PRESSURE IN HPA 1002.5 1004.0 1003.8 996.4 991.0 988.6 985.1 985.1 992.1 1006.9 1003.2 1011.8 1011.8 DAY 18 26 9 4 24 5 18 31 30 26 30 24 MIN. QFF PRESSURE IN HPA 990.6 992.6 987.5 986.8 985.3 979.5 977.3 977.4 982.3 988.8 992.7 995.5 977.3 DAY 23 19 13 20 21 25 11 24 2 3 4 28 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.2 813.2 811.4 813.6 813.6 812.7 812.1 812.4 814.9 817.0 814.0 814.4 813.5 MAX. QFE PRESSURE IN HPA 815.0 817.3 819.1 815.9 815.7 814.4 816.4 816.9 817.7 821.6 817.9 818.8 821.6 DAY 2 26 9 4 30 10 18 31 30 26 14 5 MIN. QFE PRESSURE IN HPA 810.2 810.7 806.2 808.9 808.0 810.9 808.5 809.0 812.8 811.7 808.2 808.8 806.2 DAY 16 23 13 20 7 24 28 4 20 23 19 21 MEAN QNH PRESSURE IN HPA 996.6 996.6 994.5 997.1 997.1 996.0 995.3 995.6 998.6 1001.1 997.6 998.0 997.0 MAX. QNH PRESSURE IN HPA 998.7 1001.4 1003.6 999.8 999.6 998.0 1000.4 1001.0 1001.9 1006.5 1002.2 1003.2 1006.5 DAY 2 26 9 4 30 10 18 31 30 26 14 5 MIN. QNH PRESSURE IN HPA 993.1 993.7 988.4 991.5 990.5 993.9 991.1 991.7 996.1 994.8 990.7 991.4 988.4 DAY 16 23 13 20 7 24 28 4 20 23 19 21 MEAN QFF PRESSURE IN HPA 996.0 995.8 993.8 991.2 988.1 983.5 979.9 980.5 985.8 993.1 995.8 1001.4 990.4 MAX. QFF PRESSURE IN HPA 1000.4 1001.7 1004.6 995.2 991.7 987.9 984.6 985.7 991.4 1002.0 1001.5 1006.6 1006.6 DAY 18 26 9 4 30 1 20 31 30 27 30 23 MIN. QFF PRESSURE IN HPA 991.7 991.3 988.0 984.8 982.3 979.6 975.7 976.4 981.5 988.2 988.7 995.8 975.7 DAY 23 17 20 20 7 25 28 24 2 3 19 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1953 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 813.4 813.2 811.3 813.5 813.4 812.4 811.7 812.0 814.6 817.1 814.3 814.4 813.4 MAX. QFE PRESSURE IN HPA 815.6 815.5 819.5 816.0 815.9 814.5 816.1 816.9 819.0 822.4 818.3 819.2 822.4 DAY 18 14 9 5 24 10 18 30 30 11 14 5 MIN. QFE PRESSURE IN HPA 810.6 811.3 806.5 808.2 808.6 810.4 807.4 809.1 812.7 811.7 808.6 809.2 806.5 DAY 16 19 13 20 7 24 28 4 9 30 19 21 MEAN QNH PRESSURE IN HPA 996.8 996.6 994.3 996.9 996.9 995.6 994.8 995.2 998.2 1001.3 997.9 998.0 996.9 MAX. QNH PRESSURE IN HPA 999.4 999.3 1004.0 999.9 999.8 998.1 1000.0 1001.0 1003.5 1007.5 1002.6 1003.7 1007.5 DAY 18 14 9 5 24 10 18 30 30 11 14 5 MIN. QNH PRESSURE IN HPA 993.5 994.4 988.7 990.7 991.2 993.3 989.8 991.8 996.0 994.8 991.2 991.9 988.7 DAY 16 19 13 20 7 24 28 4 9 30 19 21 MEAN QFF PRESSURE IN HPA 997.6 997.1 994.5 991.8 988.8 984.2 980.7 981.4 986.9 995.3 997.8 1003.2 991.6 MAX. QFF PRESSURE IN HPA 1002.5 1001.8 1006.5 997.2 991.7 989.0 985.2 986.8 994.2 1006.7 1003.6 1009.1 1009.1 DAY 18 26 9 1 24 1 18 31 30 26 14 24 MIN. QFF PRESSURE IN HPA 992.6 992.7 986.0 985.3 983.5 980.2 975.8 977.5 982.0 989.6 989.7 997.1 975.8 DAY 22 17 12 20 7 29 28 24 9 3 19 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 813.5 813.3 811.5 814.0 814.0 812.9 812.1 812.5 815.5 817.8 814.8 814.6 813.9 MAX. QFE PRESSURE IN HPA 815.6 815.8 818.2 817.2 816.2 815.2 816.3 817.2 820.1 822.6 819.5 819.3 822.6 DAY 18 14 10 5 24 5 18 31 30 11 14 5 MIN. QFE PRESSURE IN HPA 810.2 810.4 806.5 809.2 809.6 810.7 809.1 809.9 813.3 812.1 808.5 809.6 806.5 DAY 16 17 13 20 7 24 28 24 2 30 19 21 MEAN QNH PRESSURE IN HPA 996.9 996.7 994.6 997.6 997.6 996.3 995.4 995.8 999.3 1002.1 998.5 998.3 997.4 MAX. QNH PRESSURE IN HPA 999.4 999.7 1002.5 1001.3 1000.2 999.0 1000.3 1001.3 1004.7 1007.7 1004.0 1003.8 1007.7 DAY 18 14 10 5 24 5 18 31 30 11 14 5 MIN. QNH PRESSURE IN HPA 993.1 993.3 988.7 991.9 992.4 993.7 991.8 992.7 996.7 995.3 991.1 992.4 988.7 DAY 16 17 13 20 7 24 28 24 2 30 19 21 MEAN QFF PRESSURE IN HPA 997.6 997.1 994.5 991.8 988.7 983.7 980.4 981.3 987.2 995.4 997.9 1003.0 991.6 MAX. QFF PRESSURE IN HPA 1003.2 1001.9 1003.6 997.4 991.4 988.2 984.9 985.8 992.9 1005.7 1003.9 1012.8 1012.8 DAY 18 13 9 5 27 1 20 30 30 26 14 23 MIN. QFF PRESSURE IN HPA 991.8 990.1 985.9 985.7 985.8 979.3 976.5 978.3 982.0 989.8 989.7 994.9 976.5 DAY 23 17 12 20 7 24 11 4 2 22 19 27 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 813.5 813.4 811.5 814.1 814.0 813.4 812.5 812.7 815.8 818.0 814.6 814.7 814.0 MAX. QFE PRESSURE IN HPA 815.5 816.0 818.3 816.7 815.7 815.1 816.5 817.0 820.2 822.3 818.9 819.3 822.3 DAY 18 14 10 5 22 5 18 31 30 11 13 1 MIN. QFE PRESSURE IN HPA 811.3 811.2 806.4 809.4 809.8 811.2 810.2 810.2 813.9 811.9 808.7 809.8 806.4 DAY 16 23 13 20 7 14 5 23 2 30 19 20 MEAN QNH PRESSURE IN HPA 997.0 996.8 994.6 997.7 997.6 996.8 995.8 996.0 999.7 1002.3 998.3 998.4 997.6 MAX. QNH PRESSURE IN HPA 999.3 999.9 1002.6 1000.7 999.6 998.9 1000.5 1001.1 1004.9 1007.3 1003.3 1003.8 1007.3 DAY 18 14 10 5 22 5 18 31 30 11 13 1 MIN. QNH PRESSURE IN HPA 994.4 994.3 988.6 992.1 992.6 994.3 993.1 993.1 997.4 995.1 991.3 992.6 988.6 DAY 16 23 13 20 7 14 5 23 2 30 19 20 MEAN QFF PRESSURE IN HPA 996.9 996.4 994.0 991.2 988.2 984.1 980.4 980.7 986.3 994.4 996.8 1002.3 991.0 MAX. QFF PRESSURE IN HPA 1002.3 1000.9 1002.9 996.7 991.1 988.0 984.0 984.6 992.8 1006.2 1001.6 1012.8 1012.8 DAY 18 25 9 5 27 10 18 31 30 25 30 23 MIN. QFF PRESSURE IN HPA 992.2 991.5 986.9 984.5 984.7 979.4 976.3 977.5 981.6 988.3 989.4 994.1 976.3 DAY 23 17 12 20 7 25 11 23 2 3 19 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1954 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.6 1.3 4.6 10.0 16.0 20.7 22.7 22.5 18.6 12.5 5.3 1.4 11.3 MINIMUN AIR TEMPERATURE (C) ***** ***** ***** 6.3 8.1 12.3 14.0 13.1 10.1 4.8 1.3 -2.4 ***** DAYS WITH MINIMUM TEMP. >=21 **** **** **** 0 0 0 0 0 0 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** **** **** 0 0 0 0 0 0 0 1 11 **** DAYS WITH FREEZING MIN.<= 0 **** **** **** 0 0 0 0 0 0 0 11 28 **** TEMPERATURE RECORDS LOWEST(C) ***** ***** ***** 1.0 4.0 10.0 10.0 11.0 7.0 3.0 -4.0 -6.0 ***** DAY ** ** ** 1 16 20 1 6 28 14 29 17 MAXIMUM AIR TEMPERATURE (C) 5.7 6.8 10.5 15.4 23.4 28.9 31.4 31.3 27.4 20.5 10.7 6.5 18.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 13 23 31 8 0 0 0 75 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 12.0 10.0 19.0 22.0 29.0 32.0 36.0 34.0 32.0 26.0 18.0 15.0 36.0 DAY 2 19 31 25 31 28 18 11 1 3 1 28 DIF. BETWEEN (MAX.-MIN.) (C) ***** ***** ***** 9.1 15.3 16.6 17.4 18.2 17.3 15.7 9.4 8.9 ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** ***** 10.8 15.7 20.6 22.7 22.2 18.7 12.6 6.0 2.0 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 ****** 0.0 0.0 0.0 10.5 58.0 38.5 4.5 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 27.0 ****** 17.5 98.5 76.5 0.0 0.0 0.0 17.5 167.0 359.5 494.5 ****** DEWPOINT (MEAN C) -3.8 -3.1 -2.0 ***** 3.7 6.3 8.2 7.1 4.9 2.3 1.1 -1.2 ***** MIXING RATIO (G/KG) 3.64 3.82 4.17 ****** 6.32 7.51 8.57 7.94 6.81 5.61 5.15 4.35 ****** VAPOUR PRESSURE (HPA) 4.72 4.95 5.41 ****** 8.15 9.63 10.96 10.19 8.78 7.28 6.68 5.64 ****** SATURATION DEF. (HPA) 1.85 1.93 3.24 ****** 10.95 15.90 17.98 18.36 13.90 7.97 2.53 1.32 ****** RELATIVE HUMIDITY (MEAN %) 74 75 67 *** 47 41 42 40 44 53 77 84 *** RELATIVE HUMIDITY (MAX. %) 90 92 85 *** 71 61 60 58 63 76 90 96 *** RELATIVE HUMIDITY (MIN. %) 54 53 46 *** 28 25 25 22 23 33 57 68 *** RELATIVE HUMIDITY (MEAN% 03UTC) 82 88 81 *** 65 56 58 56 60 72 86 92 *** RELATIVE HUMIDITY (MEAN% 09UTC) 71 67 58 *** 32 29 30 25 26 36 64 77 *** RELATIVE HUMIDITY (MEAN% 15UTC) 69 67 63 *** 35 32 32 30 37 42 77 83 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 35.1 73.0 82.0 85.3 14.0 4.0 0.0 2.0 0.0 4.0 23.8 37.6 360.8 DAYS WITH PRECIPITATION >=10 2 5 2 2 0 0 0 0 0 0 0 1 12 DAYS WITH PRECIPITATION >= 5 3 5 5 7 1 0 0 0 0 0 1 4 26 DAYS WITH PRECIPITATION >= 1 5 10 7 13 5 1 0 1 0 1 7 8 58 DAYS WITH PRECIPITATION 9 12 9 16 5 2 0 2 1 1 12 10 79 GREATEST DAILY PRECIPITATION 12.0 14.0 30.0 29.0 6.0 4.0 0.0 2.0 0.0 4.0 6.0 11.0 30.0 DAY 3 15 14 11 3 6 ** 17 ** 26 19 6 DAY WITH THUNDER STORM 0 4 0 4 3 2 0 1 0 1 0 0 15 DAYS WITH SNOW OR SLEET 5 9 2 0 0 0 0 0 0 0 3 6 25 DAYS WITH DUST 2 0 1 0 0 0 0 1 0 0 0 0 4 WIND DIRECTION (PREVAILING) 225 225 270 270 225 225 270 225 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 15.8 15.3 4.1 7.2 6.3 5.0 3.2 4.3 4.6 5.2 3.0 5.5 7.6 PREVAILING WIND PERCENT 57.7 33.5 35.4 35.4 40.3 37.1 41.9 30.6 35.8 40.8 26.8 29.4 35.8 CALMS PERCENT OF WIND 3.6 13.4 15.4 10.0 2.4 6.7 9.7 9.7 5.8 2.5 19.6 30.2 10.7 NO. OF WIND OBSERVATION 248 224 246 240 248 240 248 248 240 238 235 248 2903 VECTOR WIND DIRECTION (MEAN) 236 239 243 238 244 225 242 222 216 232 221 231 235 VECTOR WIND MAGNITUDE(KNOTS) 10.9 7.4 3.6 6.1 4.6 2.9 2.2 2.2 2.6 3.0 1.3 2.2 4.0 WIND STEADINESES (MEAN %) 88.6 85.1 81.8 80.3 82.1 72.5 75.9 56.4 55.3 75.0 50.0 78.6 75.5 WIND SPEED (MEAN KNOTS) 12.3 8.7 4.4 7.6 5.6 4.0 2.9 3.9 4.7 4.0 2.6 2.8 5.3 FASTEST WIND DIRECTION 230 230 230 230 270 230 270 180 180 270 230 270 230 FASTEST WIND SPEED (KNOTS) 40 38 35 30 30 20 18 20 20 24 15 20 40 DAY 8 10 27 7 13 12 30 3 15 19 10 7 DAYS WITH SKY CLEAR (0-2)/8 13 7 9 4 21 27 27 22 27 23 7 9 196 DAYS WITH P.CLOUDY (3-6)/8 14 15 12 17 10 3 4 9 3 5 12 11 115 DAYS WITH CLOUDY (7-8)/8 4 6 10 9 0 0 0 0 0 3 11 10 53 DAYS WITH VISIBILITY =< 2 KM 4 8 3 0 0 1 0 0 0 0 4 8 28 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1954 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 810.6 810.1 813.7 ****** 810.2 807.5 807.0 809.1 810.6 814.0 813.3 812.2 ****** MAX. QFE PRESSURE IN HPA 819.7 820.0 820.2 ****** 815.9 812.2 811.6 815.1 815.4 819.6 818.9 823.2 ****** DAY-HOUR 17-18 22- 6 2- 9 **-** 1- 6 19- 6 31- 6 31- 9 23- 6 11- 6 5- 6 16- 6 MIN. QFE PRESSURE IN HPA 801.0 801.0 802.9 ****** 805.0 802.0 801.9 802.2 804.1 808.8 808.8 802.3 ****** DAY-HOUR 4-21 8-12 24-15 **-** 27-12 9-12 28-15 10-15 16-15 2-21 28- 0 31- 0 MEAN QNH PRESSURE IN HPA 993.5 993.0 997.2 ****** 993.1 989.9 989.3 991.8 993.6 997.6 996.7 995.4 ****** MAX. QNH PRESSURE IN HPA 1004.3 1004.6 1004.9 ****** 999.8 995.4 994.7 998.9 999.2 1004.2 1003.3 1008.4 ****** DAY-HOUR 17-18 22- 6 2- 9 **-** 1- 6 19- 6 31- 6 31- 9 23- 6 11- 6 5- 6 16- 6 MIN. QNH PRESSURE IN HPA 982.2 982.2 984.5 ****** 986.9 983.4 983.3 983.6 985.9 991.4 991.4 983.8 ****** DAY-HOUR 4-21 8-12 24-15 **-** 27-12 9-12 28-15 10-15 16-15 2-21 28- 0 31- 0 MEAN QFF PRESSURE IN HPA 994.9 993.9 996.2 ****** 983.6 977.2 975.2 977.9 982.3 990.4 994.6 996.2 ****** MAX. QFF PRESSURE IN HPA 1007.1 1005.3 1009.1 ****** 991.0 984.8 980.5 985.8 990.3 997.2 1001.6 1011.6 ****** DAY-HOUR 17-18 22- 6 2-15 **-** 1- 6 20- 3 31- 6 31- 6 23- 6 13- 3 29- 3 16- 6 MIN. QFF PRESSURE IN HPA 982.6 982.1 979.7 ****** 974.8 970.0 968.4 968.8 974.2 979.6 989.0 982.5 ****** DAY-HOUR 9- 0 8-21 24-12 **-** 27-12 9-12 28-12 11-12 16-12 2-21 1-12 30-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 810.3 810.0 813.8 ****** 810.3 807.9 807.3 809.2 810.9 814.1 813.5 812.2 ****** MAX. QFE PRESSURE IN HPA 815.4 818.7 819.1 ****** 814.6 812.1 809.5 813.5 814.3 818.3 818.3 821.0 ****** DAY 17 22 3 ** 31 3 15 31 23 13 6 16 MIN. QFE PRESSURE IN HPA 802.2 801.7 806.2 ****** 806.2 804.4 805.0 804.7 807.7 809.4 808.8 802.3 ****** DAY 9 9 25 ** 13 10 22 11 17 3 28 31 MEAN QNH PRESSURE IN HPA 993.2 992.8 997.3 ****** 993.1 990.4 989.7 991.9 993.9 997.7 996.9 995.4 ****** MAX. QNH PRESSURE IN HPA 999.2 1003.1 1003.6 ****** 998.3 995.3 992.2 997.0 997.9 1002.6 1002.6 1005.8 ****** DAY 17 22 3 ** 31 3 15 31 23 13 6 16 MIN. QNH PRESSURE IN HPA 983.6 983.0 988.4 ****** 988.4 986.2 986.9 986.6 990.1 992.1 991.4 983.8 ****** DAY 9 9 25 ** 13 10 22 11 17 3 28 31 MEAN QFF PRESSURE IN HPA 993.9 993.0 995.9 ****** 983.7 977.5 975.3 977.6 982.1 990.1 994.1 995.7 ****** MAX. QFF PRESSURE IN HPA 1000.0 1003.0 1007.1 ****** 988.2 983.0 978.9 982.1 988.5 996.6 999.7 1006.7 ****** DAY 15 22 3 ** 1 20 15 31 22 24 29 16 MIN. QFF PRESSURE IN HPA 982.6 984.6 983.8 ****** 976.5 972.7 970.8 971.5 978.1 981.8 989.0 983.5 ****** DAY 9 9 25 ** 27 10 22 11 11 3 1 31 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 810.6 810.1 813.7 ****** 810.5 808.1 807.6 809.7 811.2 814.3 813.7 812.1 ****** MAX. QFE PRESSURE IN HPA 815.1 819.2 819.1 ****** 814.1 811.8 810.0 814.3 814.6 818.5 818.0 821.7 ****** DAY 17 22 23 ** 25 1 20 31 23 13 5 16 MIN. QFE PRESSURE IN HPA 805.0 802.0 806.6 ****** 805.8 804.9 805.1 805.0 807.0 809.6 809.3 803.4 ****** DAY 22 9 25 ** 13 10 22 10 17 3 28 31 MEAN QNH PRESSURE IN HPA 993.5 992.9 997.2 ****** 993.4 990.6 990.0 992.5 994.2 997.9 997.2 995.3 ****** MAX. QNH PRESSURE IN HPA 998.9 1003.7 1003.6 ****** 997.7 995.0 992.8 997.9 998.3 1002.9 1002.3 1006.6 ****** DAY 17 22 23 ** 25 1 20 31 23 13 5 16 MIN. QNH PRESSURE IN HPA 986.9 983.4 988.8 ****** 987.9 986.8 987.1 986.9 989.3 992.4 992.0 985.1 ****** DAY 22 9 25 ** 13 10 22 10 17 3 28 31 MEAN QFF PRESSURE IN HPA 995.9 994.6 997.0 ****** 984.9 978.6 976.7 979.7 984.0 992.2 996.3 996.9 ****** MAX. QFF PRESSURE IN HPA 1003.0 1004.5 1009.1 ****** 990.3 984.8 979.8 984.5 990.0 997.2 1001.6 1009.9 ****** DAY 16 22 3 ** 1 20 15 31 23 13 29 16 MIN. QFF PRESSURE IN HPA 986.6 986.2 986.0 ****** 977.7 974.9 972.4 974.0 979.5 983.4 992.8 985.8 ****** DAY 11 16 25 ** 27 10 22 10 17 3 22 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1954 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 811.3 810.8 814.2 ****** 811.0 808.4 807.9 810.2 811.6 814.9 813.9 812.7 ****** MAX. QFE PRESSURE IN HPA 816.3 820.0 820.0 ****** 815.9 812.2 811.6 814.9 815.4 819.6 818.9 823.2 ****** DAY 16 22 2 ** 1 19 31 31 23 11 5 16 MIN. QFE PRESSURE IN HPA 804.6 803.4 808.0 ****** 806.0 804.9 805.4 805.1 807.4 810.4 809.5 804.9 ****** DAY 11 16 14 ** 13 9 27 10 16 3 24 30 MEAN QNH PRESSURE IN HPA 994.4 993.8 997.8 ****** 994.0 991.0 990.3 993.1 994.8 998.6 997.5 996.1 ****** MAX. QNH PRESSURE IN HPA 1000.3 1004.6 1004.6 ****** 999.8 995.4 994.7 998.6 999.2 1004.2 1003.3 1008.4 ****** DAY 16 22 2 ** 1 19 31 31 23 11 5 16 MIN. QNH PRESSURE IN HPA 986.5 985.1 990.5 ****** 988.1 986.8 987.4 987.1 989.8 993.3 992.2 986.8 ****** DAY 11 16 14 ** 13 9 27 10 16 3 24 30 MEAN QFF PRESSURE IN HPA 995.9 994.9 996.9 ****** 984.2 978.2 976.3 979.6 984.0 991.8 995.6 997.2 ****** MAX. QFF PRESSURE IN HPA 1004.0 1005.3 1008.1 ****** 991.0 984.1 980.5 985.8 990.3 996.9 1000.2 1011.6 ****** DAY 16 22 2 ** 1 20 31 31 23 13 29 16 MIN. QFF PRESSURE IN HPA 984.7 987.3 986.2 ****** 977.4 974.2 972.2 972.9 978.9 984.4 991.5 985.1 ****** DAY 11 8 24 ** 27 14 28 11 16 3 1 30 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 811.0 810.6 814.3 ****** 810.7 807.7 807.3 809.6 810.9 814.4 813.6 812.4 ****** MAX. QFE PRESSURE IN HPA 816.4 819.6 820.2 ****** 815.5 811.5 810.9 815.1 814.1 819.0 818.3 822.1 ****** DAY 24 22 2 ** 24 3 31 31 23 11 5 16 MIN. QFE PRESSURE IN HPA 804.1 803.0 807.9 ****** 806.7 803.4 804.3 804.2 805.9 811.1 809.2 803.4 ****** DAY 11 16 14 ** 7 9 28 11 16 3 24 30 MEAN QNH PRESSURE IN HPA 994.1 993.6 997.9 ****** 993.6 990.1 989.7 992.3 993.9 998.0 997.0 995.7 ****** MAX. QNH PRESSURE IN HPA 1000.4 1004.2 1004.9 ****** 999.3 994.6 993.9 998.9 997.7 1003.5 1002.6 1007.1 ****** DAY 24 22 2 ** 24 3 31 31 23 11 5 16 MIN. QNH PRESSURE IN HPA 985.9 984.6 990.4 ****** 988.9 985.1 986.1 986.0 988.0 994.1 991.9 985.1 ****** DAY 11 16 14 ** 7 9 28 11 16 3 24 30 MEAN QFF PRESSURE IN HPA 995.1 994.0 996.6 ****** 983.6 976.8 974.8 977.6 981.6 989.8 994.2 996.1 ****** MAX. QFF PRESSURE IN HPA 1001.2 1004.1 1006.8 ****** 988.6 982.4 978.5 984.2 987.2 994.2 998.9 1010.5 ****** DAY 24 22 3 ** 24 20 31 31 23 13 29 16 MIN. QFF PRESSURE IN HPA 983.8 985.4 987.4 ****** 977.0 971.0 969.6 970.2 975.7 983.1 989.5 983.3 ****** DAY 11 8 24 ** 27 9 28 11 16 3 1 30 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 810.1 809.7 813.3 ****** 809.5 806.8 806.3 808.3 809.7 813.4 812.6 811.6 ****** MAX. QFE PRESSURE IN HPA 815.7 818.7 819.7 ****** 814.5 810.6 809.8 813.2 813.0 818.9 817.4 820.0 ****** DAY 17 22 2 ** 24 3 31 31 23 25 5 16 MIN. QFE PRESSURE IN HPA 804.1 801.0 803.9 ****** 805.0 802.0 802.9 802.7 804.2 809.9 809.0 803.1 ****** DAY 11 8 24 ** 27 9 28 10 16 3 23 30 MEAN QNH PRESSURE IN HPA 992.9 992.5 996.7 ****** 992.2 989.0 988.5 990.9 992.5 996.8 995.9 994.7 ****** MAX. QNH PRESSURE IN HPA 999.6 1003.1 1004.3 ****** 998.1 993.5 992.6 996.6 996.4 1003.3 1001.6 1004.6 ****** DAY 17 22 2 ** 24 3 31 31 23 25 5 16 MIN. QNH PRESSURE IN HPA 985.9 982.2 985.6 ****** 986.9 983.4 984.5 984.2 986.0 992.7 991.7 984.7 ****** DAY 11 8 24 ** 27 9 28 10 16 3 23 30 MEAN QFF PRESSURE IN HPA 993.6 992.7 995.2 ****** 982.7 976.0 974.1 976.5 980.8 989.3 993.2 994.9 ****** MAX. QFF PRESSURE IN HPA 1000.1 1002.9 1007.5 ****** 988.3 981.3 978.6 982.1 986.1 996.9 998.6 1007.8 ****** DAY 17 22 2 ** 1 3 2 31 22 25 29 16 MIN. QFF PRESSURE IN HPA 983.9 982.4 979.7 ****** 974.8 970.0 968.4 968.8 974.2 983.2 989.0 983.9 ****** DAY 11 8 24 ** 27 9 28 11 16 3 1 30 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1954 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 810.2 809.7 813.1 ****** 809.4 806.3 805.7 807.7 809.6 813.4 812.5 811.8 ****** MAX. QFE PRESSURE IN HPA 814.7 817.8 819.8 ****** 814.1 810.5 808.3 812.6 812.7 817.5 815.9 820.1 ****** DAY 15 22 2 ** 1 3 31 31 22 12 6 15 MIN. QFE PRESSURE IN HPA 803.3 801.1 802.9 ****** 805.7 802.3 801.9 802.2 804.1 809.8 809.1 803.1 ****** DAY 11 8 24 ** 27 9 28 10 16 2 23 30 MEAN QNH PRESSURE IN HPA 993.0 992.5 996.5 ****** 992.2 988.5 987.8 990.2 992.3 996.8 995.8 995.0 ****** MAX. QNH PRESSURE IN HPA 998.4 1002.0 1004.4 ****** 997.7 993.4 990.8 995.9 996.0 1001.7 999.8 1004.7 ****** DAY 15 22 2 ** 1 3 31 31 22 12 6 15 MIN. QNH PRESSURE IN HPA 984.9 982.3 984.5 ****** 987.8 983.8 983.3 983.6 985.9 992.6 991.8 984.7 ****** DAY 11 8 24 ** 27 9 28 10 16 2 23 30 MEAN QFF PRESSURE IN HPA 995.3 994.1 996.2 ****** 983.5 976.5 974.4 977.3 982.0 990.6 995.0 996.4 ****** MAX. QFF PRESSURE IN HPA 1002.5 1002.8 1009.1 ****** 990.0 982.9 977.8 982.9 987.8 995.8 1000.0 1008.4 ****** DAY 15 22 2 ** 1 19 3 31 23 12 29 16 MIN. QFF PRESSURE IN HPA 983.1 984.5 980.4 ****** 977.0 971.3 968.5 970.4 975.1 984.5 991.2 985.1 ****** DAY 11 8 24 ** 27 9 28 10 16 3 22 30 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 810.9 810.2 813.7 ****** 810.3 807.5 806.8 808.8 810.5 814.0 813.3 812.3 ****** MAX. QFE PRESSURE IN HPA 819.7 817.7 819.8 ****** 814.9 811.3 810.6 813.0 814.2 818.3 818.3 821.1 ****** DAY 17 21 2 ** 24 3 31 30 22 11 5 15 MIN. QFE PRESSURE IN HPA 804.0 801.0 805.1 ****** 806.1 803.1 803.8 802.8 805.4 809.9 809.2 802.6 ****** DAY 21 8 24 ** 27 9 27 10 16 2 27 30 MEAN QNH PRESSURE IN HPA 993.9 993.0 997.2 ****** 993.2 989.9 989.0 991.4 993.4 997.6 996.8 995.5 ****** MAX. QNH PRESSURE IN HPA 1004.3 1001.9 1004.4 ****** 998.6 994.4 993.5 996.4 997.8 1002.6 1002.6 1005.9 ****** DAY 17 21 2 ** 24 3 31 30 22 11 5 15 MIN. QNH PRESSURE IN HPA 985.8 982.2 987.1 ****** 988.2 984.7 985.5 984.3 987.4 992.7 991.9 984.1 ****** DAY 21 8 24 ** 27 9 27 10 16 2 27 30 MEAN QFF PRESSURE IN HPA 995.4 994.2 996.2 ****** 983.4 977.1 975.0 977.9 982.7 990.8 995.0 996.6 ****** MAX. QFF PRESSURE IN HPA 1007.1 1001.8 1008.1 ****** 988.9 982.2 980.5 983.0 988.5 996.3 999.5 1009.4 ****** DAY 17 22 2 ** 1 19 31 31 22 12 29 16 MIN. QFF PRESSURE IN HPA 984.4 983.1 983.0 ****** 975.9 971.7 970.3 970.0 976.7 982.6 991.4 983.1 ****** DAY 11 8 24 ** 27 9 27 10 16 2 3 30 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 810.3 810.2 813.8 ****** 810.3 807.8 807.2 809.3 810.8 814.0 813.4 812.3 ****** MAX. QFE PRESSURE IN HPA 815.1 818.0 819.9 ****** 814.7 811.5 811.5 813.9 813.9 818.2 818.4 821.2 ****** DAY 16 21 2 ** 24 2 31 31 22 11 5 15 MIN. QFE PRESSURE IN HPA 801.0 801.3 805.7 ****** 806.1 804.6 804.2 803.8 806.1 808.8 809.0 802.5 ****** DAY 4 8 24 ** 12 9 9 10 16 2 27 30 MEAN QNH PRESSURE IN HPA 993.2 993.0 997.3 ****** 993.2 990.2 989.5 992.0 993.7 997.5 996.8 995.5 ****** MAX. QNH PRESSURE IN HPA 998.9 1002.3 1004.5 ****** 998.4 994.6 994.6 997.4 997.4 1002.5 1002.7 1006.0 ****** DAY 16 21 2 ** 24 2 31 31 22 11 5 15 MIN. QNH PRESSURE IN HPA 982.2 982.6 987.8 ****** 988.2 986.5 986.0 985.5 988.2 991.4 991.7 984.0 ****** DAY 4 8 24 ** 12 9 9 10 16 2 27 30 MEAN QFF PRESSURE IN HPA 994.2 993.5 995.8 ****** 983.1 977.0 974.8 977.2 981.4 989.4 994.1 995.9 ****** MAX. QFF PRESSURE IN HPA 1001.7 1002.6 1007.0 ****** 987.9 982.1 980.2 982.7 987.3 995.3 999.3 1007.4 ****** DAY 15 21 2 ** 9 20 31 31 21 23 28 16 MIN. QFF PRESSURE IN HPA 983.2 982.1 981.8 ****** 976.9 972.1 970.8 969.9 975.9 979.6 989.6 982.5 ****** DAY 11 8 24 ** 27 9 27 10 16 2 2 30 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.6 2.9 5.3 11.2 14.1 20.0 24.2 24.6 20.0 12.5 7.1 1.6 11.9 MINIMUN AIR TEMPERATURE (C) -4.7 -2.1 0.9 5.1 7.6 12.0 15.8 16.1 11.9 5.3 2.2 -2.1 5.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 23 9 4 0 0 0 0 0 0 0 0 8 44 DAYS WITH FREEZING MIN.<= 0 30 20 11 3 0 0 0 0 0 0 5 27 96 TEMPERATURE RECORDS LOWEST(C) -8.0 -10.0 -5.0 -2.0 2.0 7.0 14.0 14.0 5.0 2.0 -2.0 -5.0 -10.0 DAY 9 3 8 12 9 11 1 18 30 14 26 8 MAXIMUM AIR TEMPERATURE (C) 5.0 8.5 11.0 18.2 21.0 28.4 32.4 32.6 27.7 20.2 13.4 6.7 18.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 12 30 29 7 0 0 0 78 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 10.0 18.0 18.0 23.0 28.0 33.0 35.0 37.0 31.0 26.0 18.0 13.0 37.0 DAY 13 28 1 3 29 27 18 10 4 3 1 22 DIF. BETWEEN (MAX.-MIN.) (C) 9.7 10.6 10.1 13.1 13.4 16.4 16.6 16.5 15.8 14.9 11.2 8.8 13.1 MEAN DAILY TEMP. (MDT) (C) 0.1 3.2 6.0 11.6 14.3 20.2 24.1 24.4 19.8 12.7 7.8 2.3 12.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 25.0 96.0 104.0 8.5 0.0 0.0 0.0 233.5 HEATING DEG. DAYS(BASE 18 0C) 553.5 414.5 373.5 190.5 118.5 10.5 0.0 0.0 10.0 163.0 305.5 487.0 2626.5 DEWPOINT (MEAN C) -3.6 -4.1 -1.9 -0.1 3.7 5.9 7.2 6.1 4.3 0.8 -0.1 -2.5 1.3 MIXING RATIO (G/KG) 3.69 3.54 4.19 4.84 6.35 7.30 8.09 7.51 6.52 5.15 4.79 3.99 5.50 VAPOUR PRESSURE (HPA) 4.78 4.58 5.40 6.26 8.19 9.39 10.35 9.62 8.40 6.68 6.19 5.16 7.08 SATURATION DEF. (HPA) 1.27 3.40 3.87 7.84 8.80 15.46 21.33 22.88 16.23 8.54 4.23 1.86 9.64 RELATIVE HUMIDITY (MEAN %) 82 65 64 50 53 43 36 32 38 48 63 76 54 RELATIVE HUMIDITY (MAX. %) 95 85 85 76 77 63 52 48 55 71 83 90 73 RELATIVE HUMIDITY (MIN. %) 59 43 42 28 31 25 22 20 24 30 41 56 35 RELATIVE HUMIDITY (MEAN% 03UTC) 91 80 78 70 71 62 50 45 54 67 72 83 69 RELATIVE HUMIDITY (MEAN% 09UTC) 76 54 52 39 40 31 27 24 28 34 51 66 44 RELATIVE HUMIDITY (MEAN% 15UTC) 77 58 56 42 45 32 26 24 28 39 57 73 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 12.0 9.0 68.1 74.1 50.0 0.0 0.0 0.0 0.0 2.0 40.0 47.7 302.9 DAYS WITH PRECIPITATION >=10 0 0 2 3 2 0 0 0 0 0 1 2 10 DAYS WITH PRECIPITATION >= 5 1 0 6 6 4 0 0 0 0 0 3 4 24 DAYS WITH PRECIPITATION >= 1 3 3 15 7 9 0 0 0 0 2 8 8 55 DAYS WITH PRECIPITATION 4 4 17 11 12 0 0 0 0 2 9 10 69 GREATEST DAILY PRECIPITATION 5.0 4.0 18.0 21.0 14.0 0.0 0.0 0.0 0.0 1.0 10.0 14.0 21.0 DAY 27 1 12 29 3 ** ** ** ** 11 8 29 DAY WITH THUNDER STORM 0 0 0 0 1 2 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 3 6 6 1 0 0 0 0 0 0 0 8 24 DAYS WITH DUST 1 0 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 225 225 225 225 270 225 225 225 270 225 270 225 225 PREVAILING WIND SPEED(KNOTS) 4.4 12.3 10.5 8.0 5.0 4.9 4.0 5.1 6.1 3.0 8.4 5.7 6.5 PREVAILING WIND PERCENT 21.4 28.6 29.4 38.8 39.9 36.7 31.6 32.0 25.7 30.4 34.6 25.4 29.7 CALMS PERCENT OF WIND 27.4 16.1 23.4 5.4 6.9 15.0 11.7 10.2 13.9 11.7 10.0 23.4 14.6 NO. OF WIND OBSERVATION 248 224 248 240 248 240 247 244 237 247 240 248 2911 VECTOR WIND DIRECTION (MEAN) 223 220 230 233 246 242 239 226 228 227 241 247 233 VECTOR WIND MAGNITUDE(KNOTS) 1.6 6.0 5.6 5.6 3.1 2.8 2.3 2.8 2.9 1.8 5.7 3.5 3.6 WIND STEADINESES (MEAN %) 66.7 82.2 81.2 81.2 72.1 82.4 74.2 57.1 59.2 58.1 78.1 76.1 73.5 WIND SPEED (MEAN KNOTS) 2.4 7.3 6.9 6.9 4.3 3.4 3.1 4.9 4.9 3.1 7.3 4.6 4.9 FASTEST WIND DIRECTION 220 210 210 220 230 230 230 230 230 200 270 270 210 FASTEST WIND SPEED (KNOTS) 35 55 45 30 30 25 25 35 35 22 40 35 55 DAY 11 11 3 9 20 3 29 15 25 29 24 19 DAYS WITH SKY CLEAR (0-2)/8 14 12 6 15 15 26 31 27 30 25 13 13 227 DAYS WITH P.CLOUDY (3-6)/8 9 12 12 11 12 4 0 4 0 6 13 9 92 DAYS WITH CLOUDY (7-8)/8 8 4 13 4 4 0 0 0 0 0 4 9 46 DAYS WITH VISIBILITY =< 2 KM 5 4 8 1 1 0 0 1 2 0 0 9 31 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 811.7 809.1 807.1 810.2 810.6 808.8 806.3 807.3 810.3 813.4 811.8 809.2 809.6 MAX. QFE PRESSURE IN HPA 818.1 815.0 830.3 818.4 816.1 814.0 811.5 811.2 816.8 819.2 817.9 817.5 830.3 DAY-HOUR 9- 6 8- 6 2- 6 2- 0 8-18 6- 6 10- 6 23- 6 22- 3 18- 6 16- 6 2- 9 MIN. QFE PRESSURE IN HPA 802.5 798.9 798.9 800.2 804.0 803.7 801.1 802.1 804.5 809.1 802.3 801.4 798.9 DAY-HOUR 31-21 23- 0 3-21 10- 0 3- 0 29-12 28-15 7-15 1-15 31-15 24-18 29- 0 MEAN QNH PRESSURE IN HPA 994.8 991.7 989.4 993.1 993.6 991.4 988.5 989.7 993.2 996.9 994.9 991.9 992.4 MAX. QNH PRESSURE IN HPA 1002.4 998.7 1016.8 1002.7 1000.0 997.6 994.6 994.3 1000.9 1003.7 1002.2 1001.7 1016.8 DAY-HOUR 9- 6 8- 6 2- 6 2- 0 8-18 6- 6 10- 6 23- 6 22- 3 18- 6 16- 6 2- 9 MIN. QNH PRESSURE IN HPA 984.0 979.7 979.7 981.3 985.8 985.4 982.3 983.5 986.4 991.8 983.8 982.7 979.7 DAY-HOUR 31-21 23- 0 3-21 10- 0 3- 0 29-12 28-15 7-15 1-15 31-15 24-18 29- 0 MEAN QFF PRESSURE IN HPA 997.0 991.5 987.3 986.9 985.3 979.2 973.5 974.4 981.0 989.9 991.5 992.4 985.8 MAX. QFF PRESSURE IN HPA 1007.7 1000.4 1012.9 995.7 996.8 986.6 981.6 980.3 990.7 997.3 1000.8 1000.8 1012.9 DAY-HOUR 9- 6 8- 6 2- 6 2- 0 8-21 6- 6 9- 6 31- 3 22- 9 15- 6 16- 6 2- 9 MIN. QFF PRESSURE IN HPA 986.8 975.9 973.7 976.2 977.4 970.4 967.2 967.2 972.5 983.0 980.0 983.5 967.2 DAY-HOUR 26-12 23- 0 3-21 10- 0 21-18 29-12 20-12 6-12 10-12 6-12 24-18 29- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 811.8 809.0 807.1 810.4 810.6 809.2 806.9 807.8 810.6 813.6 811.8 809.4 809.9 MAX. QFE PRESSURE IN HPA 816.7 813.3 812.6 818.4 814.9 812.0 810.4 810.3 816.3 817.4 816.5 816.1 818.4 DAY 10 8 31 2 9 1 9 22 22 18 17 3 MIN. QFE PRESSURE IN HPA 806.2 798.9 800.0 800.2 804.0 806.3 801.7 804.3 806.0 810.3 803.9 801.4 798.9 DAY 26 23 13 10 3 29 29 7 1 13 25 29 MEAN QNH PRESSURE IN HPA 994.9 991.6 989.4 993.3 993.6 991.9 989.2 990.2 993.5 997.1 995.0 992.1 992.7 MAX. QNH PRESSURE IN HPA 1000.7 996.7 995.9 1002.7 998.6 995.2 993.3 993.2 1000.3 1001.6 1000.5 1000.0 1002.7 DAY 10 8 31 2 9 1 9 22 22 18 17 3 MIN. QNH PRESSURE IN HPA 988.4 979.7 981.0 981.3 985.8 988.5 983.0 986.1 988.1 993.2 985.6 982.7 979.7 DAY 26 23 13 10 3 29 29 7 1 13 25 29 MEAN QFF PRESSURE IN HPA 996.2 990.9 986.9 986.9 985.1 979.3 973.9 974.7 980.7 989.5 990.8 992.1 985.6 MAX. QFF PRESSURE IN HPA 1003.6 998.8 992.7 995.7 995.4 983.9 978.9 978.8 988.7 996.0 997.3 998.8 1003.6 DAY 10 24 22 2 9 1 9 31 21 15 17 3 MIN. QFF PRESSURE IN HPA 987.9 975.9 981.6 976.2 978.4 973.4 967.4 968.5 974.8 983.8 983.1 983.5 967.4 DAY 26 23 5 10 26 29 29 6 1 6 24 29 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 811.9 809.4 807.2 810.5 810.7 809.4 806.9 807.9 810.8 813.8 811.9 809.1 810.0 MAX. QFE PRESSURE IN HPA 816.4 814.2 811.8 814.9 815.2 812.2 810.9 810.2 816.8 817.8 816.4 815.3 817.8 DAY 9 8 22 2 18 1 10 22 22 18 17 3 MIN. QFE PRESSURE IN HPA 805.6 799.4 800.3 800.5 804.0 806.5 801.9 803.9 805.9 809.8 804.8 801.5 799.4 DAY 26 23 13 10 3 4 29 7 1 7 24 29 MEAN QNH PRESSURE IN HPA 995.1 992.2 989.6 993.4 993.7 992.1 989.2 990.4 993.7 997.3 995.1 991.8 992.8 MAX. QNH PRESSURE IN HPA 1000.4 997.8 995.0 998.6 999.0 995.4 993.9 993.1 1000.9 1002.0 1000.4 999.1 1002.0 DAY 9 8 22 2 18 1 10 22 22 18 17 3 MIN. QNH PRESSURE IN HPA 987.6 980.3 981.4 981.6 985.8 988.7 983.3 985.6 988.0 992.6 986.7 982.8 980.3 DAY 26 23 13 10 3 4 29 7 1 7 24 29 MEAN QFF PRESSURE IN HPA 998.1 993.0 988.1 988.3 986.4 981.2 975.2 976.0 982.7 991.4 992.7 993.1 987.2 MAX. QFF PRESSURE IN HPA 1004.9 999.9 994.8 994.5 996.3 986.2 979.9 980.3 990.7 997.2 999.6 999.4 1004.9 DAY 10 8 22 13 9 1 9 31 30 14 26 10 MIN. QFF PRESSURE IN HPA 988.8 978.6 977.2 980.5 979.3 976.1 968.3 970.6 976.1 985.1 983.1 984.2 968.3 DAY 26 23 4 10 26 30 29 15 1 7 24 29 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 812.2 809.7 808.3 811.0 811.3 809.6 807.1 808.2 811.4 814.4 812.7 809.6 810.5 MAX. QFE PRESSURE IN HPA 818.1 815.0 830.3 816.1 815.5 814.0 811.5 811.2 816.6 819.2 817.9 817.2 830.3 DAY 9 8 2 2 17 6 10 23 22 18 16 2 MIN. QFE PRESSURE IN HPA 805.6 802.1 799.5 803.3 805.0 804.8 802.7 804.3 806.1 811.2 804.7 802.3 799.5 DAY 26 23 4 10 3 30 29 15 1 25 24 29 MEAN QNH PRESSURE IN HPA 995.4 992.5 990.9 994.0 994.4 992.4 989.4 990.7 994.4 998.1 996.0 992.4 993.4 MAX. QNH PRESSURE IN HPA 1002.4 998.7 1016.8 1000.0 999.3 997.6 994.6 994.3 1000.6 1003.7 1002.2 1001.3 1016.8 DAY 9 8 2 2 17 6 10 23 22 18 16 2 MIN. QNH PRESSURE IN HPA 987.6 983.5 980.4 984.9 986.9 986.7 984.2 986.1 988.2 994.3 986.6 983.8 980.4 DAY 26 23 4 10 3 30 29 15 1 25 24 29 MEAN QFF PRESSURE IN HPA 998.4 992.5 989.0 987.6 986.0 980.2 974.8 975.7 982.7 991.5 992.9 993.2 987.0 MAX. QFF PRESSURE IN HPA 1007.7 1000.4 1012.9 994.5 995.1 986.6 981.6 980.2 990.4 997.3 1000.8 1000.0 1012.9 DAY 9 8 2 12 8 6 9 23 30 15 16 2 MIN. QFF PRESSURE IN HPA 988.0 981.7 975.3 981.4 980.6 972.7 970.6 969.8 975.4 985.3 982.4 984.1 969.8 DAY 26 23 4 9 22 30 28 15 1 7 24 29 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 812.0 809.5 807.2 810.3 810.8 809.1 806.4 807.6 810.6 813.8 812.2 809.6 809.9 MAX. QFE PRESSURE IN HPA 817.0 814.9 812.6 815.0 815.3 812.8 810.8 811.2 816.6 818.2 817.5 817.5 818.2 DAY 9 8 22 2 17 1 10 23 22 18 16 2 MIN. QFE PRESSURE IN HPA 806.5 802.2 800.1 802.1 804.3 804.3 802.5 803.5 805.5 810.6 805.7 803.5 800.1 DAY 26 23 12 10 3 22 29 15 1 1 23 29 MEAN QNH PRESSURE IN HPA 995.2 992.2 989.6 993.2 993.8 991.8 988.6 990.0 993.6 997.4 995.4 992.4 992.8 MAX. QNH PRESSURE IN HPA 1001.1 998.6 995.9 998.7 999.1 996.1 993.8 994.3 1000.6 1002.5 1001.7 1001.7 1002.5 DAY 9 8 22 2 17 1 10 23 22 18 16 2 MIN. QNH PRESSURE IN HPA 988.7 983.6 981.2 983.5 986.1 986.1 984.0 985.2 987.5 993.5 987.8 985.2 981.2 DAY 26 23 12 10 3 22 29 15 1 1 23 29 MEAN QFF PRESSURE IN HPA 997.1 991.6 986.8 986.3 985.1 978.8 973.0 973.9 980.5 989.4 991.4 992.4 985.5 MAX. QFF PRESSURE IN HPA 1005.1 999.0 993.4 994.4 995.3 984.5 978.2 980.1 990.7 995.4 998.8 1000.8 1005.1 DAY 10 8 22 12 8 1 9 23 22 15 16 2 MIN. QFF PRESSURE IN HPA 988.6 982.7 977.4 980.0 979.2 970.5 969.0 968.0 973.1 983.9 983.4 985.5 968.0 DAY 26 23 4 9 21 29 28 6 10 1 23 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 810.9 808.2 806.2 809.5 810.0 808.0 805.3 806.5 809.3 812.6 810.9 808.5 808.8 MAX. QFE PRESSURE IN HPA 815.6 813.7 811.7 813.7 815.0 811.5 810.0 810.3 814.5 816.8 815.2 816.6 816.8 DAY 9 8 31 2 18 1 10 21 21 18 17 2 MIN. QFE PRESSURE IN HPA 804.6 802.2 800.1 802.5 805.6 803.7 801.5 802.4 804.7 809.7 803.4 802.1 800.1 DAY 26 10 12 9 2 29 28 7 1 1 24 29 MEAN QNH PRESSURE IN HPA 993.9 990.7 988.4 992.2 992.9 990.5 987.2 988.7 992.0 995.9 993.9 991.1 991.4 MAX. QNH PRESSURE IN HPA 999.4 997.2 994.8 997.2 998.7 994.6 992.8 993.2 998.1 1000.9 999.0 1000.6 1000.9 DAY 9 8 31 2 18 1 10 21 21 18 17 2 MIN. QNH PRESSURE IN HPA 986.5 983.6 981.2 984.0 987.6 985.4 982.8 983.9 986.6 992.5 985.1 983.5 981.2 DAY 26 10 12 9 2 29 28 7 1 1 24 29 MEAN QFF PRESSURE IN HPA 995.2 989.7 985.8 985.7 984.2 977.7 971.8 973.1 979.1 988.2 989.9 991.1 984.3 MAX. QFF PRESSURE IN HPA 1002.5 997.5 990.5 991.2 994.7 983.2 977.1 978.8 986.1 994.5 996.2 999.1 1002.5 DAY 9 8 21 12 8 1 8 21 21 14 26 2 MIN. QFF PRESSURE IN HPA 986.8 981.4 980.2 978.6 978.0 970.4 967.2 967.2 972.5 983.0 982.0 984.1 967.2 DAY 26 22 27 9 21 29 20 6 10 6 24 29 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 811.2 808.5 806.5 809.6 809.8 807.7 805.0 806.1 808.9 812.4 811.0 808.7 808.8 MAX. QFE PRESSURE IN HPA 816.2 813.8 811.5 813.7 814.6 811.0 809.1 809.7 814.5 816.9 814.8 816.2 816.9 DAY 9 8 31 1 8 1 9 21 21 18 17 2 MIN. QFE PRESSURE IN HPA 804.7 802.5 800.1 803.0 804.3 804.0 801.1 802.1 804.5 809.1 802.5 802.6 800.1 DAY 26 23 12 9 2 30 28 7 1 31 24 29 MEAN QNH PRESSURE IN HPA 994.2 991.1 988.7 992.3 992.6 990.2 986.9 988.2 991.6 995.7 994.1 991.3 991.4 MAX. QNH PRESSURE IN HPA 1000.2 997.3 994.6 997.2 998.3 994.0 991.8 992.5 998.1 1001.0 998.5 1000.2 1001.0 DAY 9 8 31 1 8 1 9 21 21 18 17 2 MIN. QNH PRESSURE IN HPA 986.6 984.0 981.2 984.6 986.1 985.8 982.3 983.5 986.4 991.8 984.0 984.1 981.2 DAY 26 23 12 9 2 30 28 7 1 31 24 29 MEAN QFF PRESSURE IN HPA 997.1 991.6 987.3 987.2 985.2 979.0 972.8 973.7 980.5 989.7 991.6 992.4 985.7 MAX. QFF PRESSURE IN HPA 1004.7 999.8 991.8 992.5 995.7 984.5 977.4 979.5 987.4 996.1 998.2 999.5 1004.7 DAY 9 8 21 12 8 2 10 21 21 14 17 2 MIN. QFF PRESSURE IN HPA 987.6 982.7 978.9 981.2 979.2 973.1 967.5 968.1 974.1 983.9 980.7 985.6 967.5 DAY 26 22 4 25 25 30 20 5 10 6 24 29 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 811.7 809.1 807.1 810.2 810.9 808.6 806.1 807.0 810.3 813.4 811.8 809.4 809.6 MAX. QFE PRESSURE IN HPA 816.7 814.1 812.6 814.2 816.1 811.9 809.8 809.7 815.2 817.4 816.7 816.5 817.4 DAY 9 8 31 1 8 1 8 29 21 18 16 2 MIN. QFE PRESSURE IN HPA 805.3 802.2 800.1 802.9 805.8 804.6 803.3 803.5 805.8 809.9 802.3 802.9 800.1 DAY 26 10 12 9 21 28 29 7 1 12 24 28 MEAN QNH PRESSURE IN HPA 994.9 991.8 989.5 993.1 993.9 991.2 988.3 989.3 993.2 996.8 994.9 992.2 992.4 MAX. QNH PRESSURE IN HPA 1000.7 997.7 995.9 997.8 1000.0 995.1 992.6 992.5 999.0 1001.6 1000.7 1000.5 1001.6 DAY 9 8 31 1 8 1 8 29 21 18 16 2 MIN. QNH PRESSURE IN HPA 987.3 983.6 981.2 984.5 987.9 986.5 984.9 985.2 987.9 992.7 983.8 984.5 981.2 DAY 26 10 12 9 21 28 29 7 1 12 24 28 MEAN QFF PRESSURE IN HPA 997.7 991.6 987.6 986.7 985.4 978.9 973.4 974.3 981.5 990.3 991.9 992.9 986.0 MAX. QFF PRESSURE IN HPA 1005.6 998.8 993.6 992.3 996.7 984.5 979.5 979.3 989.6 997.1 1000.2 999.7 1005.6 DAY 9 8 21 12 8 6 8 29 29 14 16 2 MIN. QFF PRESSURE IN HPA 988.0 979.7 976.4 979.6 977.4 971.1 969.9 967.2 974.6 985.4 980.0 985.0 967.2 DAY 26 22 3 9 21 28 27 5 1 5 24 29 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 811.7 809.2 807.1 810.4 811.0 808.9 806.8 807.5 810.7 813.7 811.9 809.3 809.8 MAX. QFE PRESSURE IN HPA 816.6 814.6 814.1 814.6 815.9 811.8 810.1 810.1 816.0 817.9 816.6 816.2 817.9 DAY 9 8 31 1 8 1 8 22 21 20 16 2 MIN. QFE PRESSURE IN HPA 802.5 801.2 798.9 801.5 804.5 805.8 804.6 804.3 806.4 810.4 803.5 802.3 798.9 DAY 31 23 3 9 2 30 29 5 1 12 24 28 MEAN QNH PRESSURE IN HPA 994.8 991.9 989.4 993.3 994.1 991.5 989.1 989.8 993.7 997.2 995.0 992.0 992.6 MAX. QNH PRESSURE IN HPA 1000.6 998.3 997.7 998.3 999.8 995.0 993.0 993.0 999.9 1002.2 1000.6 1000.2 1002.2 DAY 9 8 31 1 8 1 8 22 21 20 16 2 MIN. QNH PRESSURE IN HPA 984.0 982.5 979.7 982.8 986.4 987.9 986.5 986.1 988.6 993.3 985.2 983.8 979.7 DAY 31 23 3 9 2 30 29 5 1 12 24 28 MEAN QFF PRESSURE IN HPA 996.8 991.1 986.7 986.5 985.3 978.5 973.4 973.8 980.7 989.2 991.1 992.1 985.4 MAX. QFF PRESSURE IN HPA 1003.7 998.4 992.1 993.6 996.8 982.9 978.1 978.2 989.8 995.8 997.9 999.4 1003.7 DAY 9 7 21 12 8 1 8 22 29 14 16 2 MIN. QFF PRESSURE IN HPA 987.9 979.6 973.7 978.2 978.0 972.2 970.7 967.6 974.3 984.0 981.7 984.2 967.6 DAY 26 22 3 9 25 30 13 5 1 5 24 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.9 2.3 4.0 10.0 15.7 21.0 25.3 23.5 18.1 12.5 8.1 -1.0 11.4 MINIMUN AIR TEMPERATURE (C) -6.7 -2.0 -0.2 4.8 8.3 12.3 16.3 14.9 10.0 5.4 3.8 -4.3 5.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 27 11 5 2 0 0 0 0 0 0 0 19 64 DAYS WITH FREEZING MIN.<= 0 31 18 19 4 0 0 0 0 0 0 6 26 104 TEMPERATURE RECORDS LOWEST(C) -13.0 -13.0 -5.0 -7.0 3.0 8.0 14.0 11.0 4.0 1.0 -2.0 -17.0 -17.0 DAY 21 2 18 1 8 1 4 7 29 26 13 25 MAXIMUM AIR TEMPERATURE (C) 2.2 7.6 9.1 15.7 22.8 29.5 34.4 32.7 27.3 21.3 14.2 4.6 18.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 13 31 27 6 0 0 0 77 DAYS WITH MAXIMUM TEMP. <= 0 7 0 0 0 0 0 0 0 0 0 0 6 13 TEMPERATURE RECORDS HIGHEST(C) 7.0 11.0 15.0 22.0 28.0 35.0 36.0 37.0 32.0 25.0 20.0 14.0 37.0 DAY 12 4 7 25 15 30 1 4 1 4 5 5 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 9.6 9.3 10.9 14.5 17.2 18.1 17.8 17.3 15.9 10.4 8.9 13.3 MEAN DAILY TEMP. (MDT) (C) -2.3 2.8 4.5 10.3 15.6 20.9 25.4 23.8 18.6 13.3 9.0 0.1 11.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 26.0 135.0 88.0 2.0 0.0 0.0 0.0 251.0 HEATING DEG. DAYS(BASE 18 0C) 628.0 442.0 403.0 231.5 80.0 0.5 0.0 0.0 27.5 144.5 270.5 554.0 2781.5 DEWPOINT (MEAN C) -4.6 -2.6 -1.9 1.9 1.0 5.2 9.4 8.7 4.7 -2.0 -2.5 -4.2 1.1 MIXING RATIO (G/KG) 3.44 4.06 4.17 5.57 5.17 7.01 9.43 8.91 7.14 4.10 3.98 3.58 5.55 VAPOUR PRESSURE (HPA) 4.45 5.23 5.36 7.16 6.66 9.00 12.03 11.42 9.18 5.33 5.17 4.64 7.14 SATURATION DEF. (HPA) 0.65 2.28 3.07 5.72 12.18 17.45 21.96 19.18 12.94 10.20 6.04 1.49 9.43 RELATIVE HUMIDITY (MEAN %) 88 73 68 60 39 38 39 40 45 39 50 81 55 RELATIVE HUMIDITY (MAX. %) 94 90 87 79 60 58 58 57 66 58 64 92 72 RELATIVE HUMIDITY (MIN. %) 77 50 51 42 24 23 25 29 29 22 34 67 39 RELATIVE HUMIDITY (MEAN% 03UTC) 90 81 82 73 57 56 57 55 63 56 58 86 68 RELATIVE HUMIDITY (MEAN% 09UTC) 88 66 59 54 29 28 30 31 34 25 41 76 47 RELATIVE HUMIDITY (MEAN% 15UTC) 89 69 61 51 29 26 29 33 34 33 45 81 48 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 41.0 86.0 69.6 47.4 11.0 0.0 0.0 0.0 0.0 0.0 25.0 38.9 318.9 DAYS WITH PRECIPITATION >=10 2 3 1 1 1 0 0 0 0 0 1 2 11 DAYS WITH PRECIPITATION >= 5 5 6 6 3 1 0 0 0 0 0 3 2 26 DAYS WITH PRECIPITATION >= 1 6 10 15 11 1 0 0 0 0 0 3 5 51 DAYS WITH PRECIPITATION 7 11 16 14 1 0 0 0 3 0 4 6 62 GREATEST DAILY PRECIPITATION 11.0 28.0 11.0 14.0 11.0 0.0 0.0 0.0 0.0 0.0 11.0 15.0 28.0 DAY 15 29 20 13 1 ** ** ** ** ** 9 17 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 1 0 0 0 0 1 DAYS WITH SNOW OR SLEET 5 2 9 0 0 0 0 0 0 0 0 3 19 DAYS WITH DUST 0 0 0 0 0 0 1 1 0 0 0 0 2 WIND DIRECTION (PREVAILING) 270 270 225 270 270 270 225 180 180 225 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.2 14.4 10.2 8.7 7.9 3.7 3.8 6.6 3.5 4.8 13.6 13.3 8.7 PREVAILING WIND PERCENT 19.0 23.3 25.7 35.4 35.1 40.0 25.4 21.4 24.6 29.1 33.3 17.3 25.2 CALMS PERCENT OF WIND 44.0 6.5 7.8 7.5 7.7 8.3 12.5 12.1 14.2 13.9 24.6 41.9 16.8 NO. OF WIND OBSERVATION 248 232 245 240 248 240 248 248 240 244 240 248 2921 VECTOR WIND DIRECTION (MEAN) 240 237 236 247 242 248 223 166 232 228 247 247 237 VECTOR WIND MAGNITUDE(KNOTS) 2.7 5.7 5.8 5.3 4.7 2.1 1.9 2.9 2.2 2.7 7.9 3.3 3.7 WIND STEADINESES (MEAN %) 71.1 70.4 68.2 76.8 68.1 60.0 52.8 46.8 59.5 73.0 84.9 67.3 63.8 WIND SPEED (MEAN KNOTS) 3.8 8.1 8.5 6.9 6.9 3.5 3.6 6.2 3.7 3.7 9.3 4.9 5.8 FASTEST WIND DIRECTION 270 270 270 230 270 270 90 180 230 230 230 270 270 FASTEST WIND SPEED (KNOTS) 50 35 40 30 30 24 24 25 25 25 35 30 50 DAY 30 4 15 8 3 22 3 6 25 17 10 5 DAYS WITH SKY CLEAR (0-2)/8 15 9 9 7 27 29 28 25 28 30 14 11 232 DAYS WITH P.CLOUDY (3-6)/8 10 18 13 12 3 1 3 6 2 1 12 11 92 DAYS WITH CLOUDY (7-8)/8 4 2 9 11 1 0 0 0 0 0 4 7 38 DAYS WITH VISIBILITY =< 2 KM 11 1 7 2 0 0 1 0 0 0 0 6 28 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 808.5 807.9 805.0 807.9 808.3 808.0 806.1 809.5 810.3 813.7 812.9 811.2 809.1 MAX. QFE PRESSURE IN HPA 816.3 814.2 813.6 813.5 812.9 813.1 810.7 819.7 816.2 818.0 819.2 818.6 819.7 DAY-HOUR 26- 9 5- 9 14- 6 15- 6 22-21 6- 6 30- 6 31- 0 30- 6 26- 6 20- 6 3- 6 MIN. QFE PRESSURE IN HPA 798.5 794.7 795.5 799.4 801.6 801.2 800.6 802.5 804.6 808.2 803.7 802.2 794.7 DAY-HOUR 30-12 29- 0 29-12 29-18 28- 9 28-12 15-15 15-15 11-12 17-12 8-15 21-12 MEAN QNH PRESSURE IN HPA 991.1 990.4 986.9 990.4 990.8 990.5 988.3 992.2 993.2 997.2 996.2 994.2 991.8 MAX. QNH PRESSURE IN HPA 1000.3 997.8 997.1 997.0 996.3 996.5 993.7 1004.3 1000.2 1002.3 1003.7 1003.0 1004.3 DAY-HOUR 26- 9 5- 9 14- 6 15- 6 22-21 6- 6 30- 6 31- 0 30- 6 26- 6 20- 6 3- 6 MIN. QNH PRESSURE IN HPA 979.3 974.8 975.7 980.3 982.9 982.5 981.7 984.0 986.5 990.7 985.4 983.6 974.8 DAY-HOUR 30-12 29- 0 29-12 29-18 28- 9 28-12 15-15 15-15 11-12 17-12 8-15 21-12 MEAN QFF PRESSURE IN HPA 994.9 990.4 985.5 984.9 981.5 977.7 972.5 977.6 982.2 990.4 992.3 996.8 985.6 MAX. QFF PRESSURE IN HPA 1008.1 1002.8 998.1 1000.0 988.0 984.9 978.9 990.3 994.7 998.9 1003.4 1010.6 1010.6 DAY-HOUR 26- 3 13- 6 14- 6 2- 3 10- 3 6- 6 30- 3 31- 0 30- 6 26- 6 13- 6 24- 6 MIN. QFF PRESSURE IN HPA 980.2 970.5 972.7 971.7 971.4 967.9 964.9 969.2 973.1 982.2 979.2 981.0 964.9 DAY-HOUR 30-21 29- 3 29-12 30- 0 28- 9 28-12 15-12 15-12 11-12 17-12 8- 0 5-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 808.7 807.6 805.1 807.9 808.3 808.3 806.4 809.7 810.4 813.9 812.7 811.2 809.2 MAX. QFE PRESSURE IN HPA 816.1 813.7 813.1 812.6 812.2 811.3 809.6 819.7 815.1 817.0 817.3 818.1 819.7 DAY 26 13 14 2 23 6 25 31 30 26 21 3 MIN. QFE PRESSURE IN HPA 799.3 794.7 798.3 799.4 803.1 802.6 803.3 804.6 806.1 809.1 804.3 802.6 794.7 DAY 31 29 30 30 1 28 15 15 12 29 8 11 MEAN QNH PRESSURE IN HPA 991.3 990.0 987.1 990.4 990.8 990.8 988.6 992.5 993.3 997.5 996.0 994.3 991.9 MAX. QNH PRESSURE IN HPA 1000.0 997.2 996.5 995.9 995.4 994.4 992.4 1004.3 998.9 1001.1 1001.4 1002.4 1004.3 DAY 26 13 14 2 23 6 25 31 30 26 21 3 MIN. QNH PRESSURE IN HPA 980.2 974.8 979.0 980.3 984.7 984.1 984.9 986.5 988.2 991.8 986.1 984.1 974.8 DAY 31 29 30 30 1 28 15 15 12 29 8 11 MEAN QFF PRESSURE IN HPA 994.5 989.7 985.3 984.7 981.5 977.9 972.4 977.7 981.9 990.1 991.5 996.1 985.3 MAX. QFF PRESSURE IN HPA 1006.9 1001.3 997.0 999.7 986.5 982.8 976.3 990.3 992.5 995.9 999.8 1007.3 1007.3 DAY 26 13 14 2 23 6 25 31 30 26 13 25 MIN. QFF PRESSURE IN HPA 981.1 970.7 976.8 971.7 975.3 970.2 968.2 971.7 975.5 984.4 979.2 982.8 968.2 DAY 31 29 30 30 29 28 16 5 12 17 8 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 808.5 807.6 804.6 807.9 808.5 808.5 806.7 810.1 810.8 814.0 812.8 811.1 809.3 MAX. QFE PRESSURE IN HPA 815.8 813.5 812.4 813.0 812.4 812.2 810.4 815.5 815.4 817.2 817.3 817.7 817.7 DAY 26 13 14 16 23 6 30 31 30 26 13 3 MIN. QFE PRESSURE IN HPA 799.2 794.9 798.0 799.7 803.1 803.6 803.2 804.9 806.8 809.7 803.9 803.0 794.9 DAY 31 29 30 30 28 28 20 15 12 17 8 11 MEAN QNH PRESSURE IN HPA 991.0 990.1 986.4 990.4 991.1 991.1 989.0 992.9 993.7 997.6 996.2 994.2 992.0 MAX. QNH PRESSURE IN HPA 999.7 997.0 995.7 996.4 995.7 995.4 993.3 999.3 999.2 1001.3 1001.4 1001.9 1001.9 DAY 26 13 14 16 23 6 30 31 30 26 13 3 MIN. QNH PRESSURE IN HPA 980.1 975.0 978.7 980.7 984.7 985.3 984.8 986.8 989.1 992.5 985.6 984.6 975.0 DAY 31 29 30 30 28 28 20 15 12 17 8 11 MEAN QFF PRESSURE IN HPA 995.7 990.6 985.5 985.8 982.7 978.9 974.2 979.3 983.9 992.1 992.9 997.5 986.6 MAX. QFF PRESSURE IN HPA 1008.1 1002.8 997.0 1000.0 988.0 983.9 978.9 987.7 994.3 998.8 1002.0 1009.2 1009.2 DAY 26 13 14 2 10 6 30 31 30 26 13 25 MIN. QFF PRESSURE IN HPA 982.1 970.5 977.2 973.8 975.1 971.9 969.8 973.0 977.6 984.8 979.3 983.0 969.8 DAY 31 29 29 30 28 28 16 16 12 17 8 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 809.1 808.6 805.8 808.6 809.1 808.9 807.2 810.5 811.4 814.7 813.9 812.0 810.0 MAX. QFE PRESSURE IN HPA 815.8 814.1 813.6 813.5 812.6 813.1 810.7 815.6 816.2 818.0 819.2 818.6 819.2 DAY 26 13 14 15 14 6 30 31 30 26 20 3 MIN. QFE PRESSURE IN HPA 800.7 796.8 799.0 799.7 802.3 803.5 803.8 805.3 807.5 810.3 805.4 803.9 796.8 DAY 31 29 29 30 28 28 15 15 12 17 8 10 MEAN QNH PRESSURE IN HPA 991.7 991.2 987.9 991.2 991.8 991.6 989.6 993.5 994.5 998.3 997.5 995.2 992.8 MAX. QNH PRESSURE IN HPA 999.7 997.7 997.1 997.0 995.9 996.5 993.7 999.4 1000.2 1002.3 1003.7 1003.0 1003.7 DAY 26 13 14 15 14 6 30 31 30 26 20 3 MIN. QNH PRESSURE IN HPA 981.9 977.3 979.9 980.7 983.8 985.2 985.5 987.3 989.9 993.2 987.4 985.6 977.3 DAY 31 29 29 30 28 28 15 15 12 17 8 10 MEAN QFF PRESSURE IN HPA 996.0 991.5 986.6 985.8 982.5 978.9 974.1 979.2 984.0 992.4 994.2 998.4 987.0 MAX. QFF PRESSURE IN HPA 1007.0 1002.8 998.1 999.2 988.0 984.9 978.7 986.5 994.7 998.9 1003.4 1010.6 1010.6 DAY 26 13 14 2 10 6 29 31 30 26 13 24 MIN. QFF PRESSURE IN HPA 982.0 972.6 977.3 974.6 973.2 970.2 969.0 973.4 978.2 984.4 982.3 982.8 969.0 DAY 31 29 29 30 28 28 15 15 12 17 8 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 808.8 808.7 805.4 808.3 808.4 808.2 806.5 809.7 810.6 813.9 813.1 811.8 809.5 MAX. QFE PRESSURE IN HPA 816.3 814.2 812.6 813.0 812.2 812.1 810.3 814.5 815.3 817.2 819.0 818.0 819.0 DAY 26 5 14 15 22 6 2 30 30 25 20 2 MIN. QFE PRESSURE IN HPA 800.3 797.0 797.0 799.8 801.6 802.9 803.2 804.2 806.5 809.3 804.0 803.9 797.0 DAY 30 29 29 30 28 28 15 15 11 17 9 10 MEAN QNH PRESSURE IN HPA 991.5 991.3 987.4 990.8 991.0 990.8 988.7 992.5 993.5 997.4 996.5 995.0 992.2 MAX. QNH PRESSURE IN HPA 1000.3 997.8 995.9 996.4 995.4 995.3 993.2 998.1 999.1 1001.3 1003.5 1002.3 1003.5 DAY 26 5 14 15 22 6 2 30 30 25 20 2 MIN. QNH PRESSURE IN HPA 981.4 977.5 977.5 980.8 982.9 984.5 984.8 986.0 988.7 992.0 985.8 985.6 977.5 DAY 30 29 29 30 28 28 15 15 11 17 9 10 MEAN QFF PRESSURE IN HPA 994.9 991.0 985.5 985.0 981.2 977.4 972.0 976.7 981.1 989.2 991.9 997.0 985.2 MAX. QFF PRESSURE IN HPA 1007.0 1002.1 995.7 998.2 986.6 983.3 976.8 983.6 991.5 995.4 1001.6 1008.5 1008.5 DAY 26 13 14 1 22 6 2 8 30 26 13 25 MIN. QFF PRESSURE IN HPA 982.2 973.7 973.9 974.6 971.4 969.9 967.2 970.3 974.8 982.9 981.2 982.8 967.2 DAY 31 29 29 30 28 28 15 15 11 17 8 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 807.7 807.3 804.2 807.2 807.6 807.2 805.2 808.5 809.2 812.6 812.0 810.5 808.3 MAX. QFE PRESSURE IN HPA 814.8 812.4 810.4 812.2 811.5 811.1 809.9 813.4 813.8 815.9 818.0 817.6 818.0 DAY 26 13 6 16 13 6 2 30 30 13 20 2 MIN. QFE PRESSURE IN HPA 798.5 797.4 795.5 800.1 801.6 801.2 801.2 803.1 804.6 808.2 804.8 802.2 795.5 DAY 30 29 29 30 28 28 15 15 11 17 8 21 MEAN QNH PRESSURE IN HPA 990.1 989.7 986.0 989.6 990.0 989.5 987.2 991.0 991.9 995.9 995.2 993.5 990.8 MAX. QNH PRESSURE IN HPA 998.5 995.7 993.3 995.4 994.6 994.1 992.7 996.8 997.3 999.8 1002.3 1001.8 1002.3 DAY 26 13 6 16 13 6 2 30 30 13 20 2 MIN. QNH PRESSURE IN HPA 979.3 978.0 975.7 981.2 982.9 982.5 982.5 984.7 986.5 990.7 986.7 983.6 975.7 DAY 30 29 29 30 28 28 15 15 11 17 8 21 MEAN QFF PRESSURE IN HPA 993.1 989.2 984.2 983.6 980.5 976.4 970.8 976.0 980.4 988.5 990.6 995.2 984.0 MAX. QFF PRESSURE IN HPA 1006.2 998.3 991.2 997.7 986.0 982.0 977.4 983.0 991.1 994.0 998.6 1007.6 1007.6 DAY 26 13 13 1 22 6 2 8 30 26 13 24 MIN. QFF PRESSURE IN HPA 980.7 975.3 972.7 972.3 972.6 967.9 964.9 969.2 973.1 982.2 981.6 981.0 964.9 DAY 30 29 29 29 28 28 15 15 11 17 7 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 808.1 807.6 804.3 807.2 807.4 806.8 804.7 808.2 809.3 812.9 812.4 810.8 808.3 MAX. QFE PRESSURE IN HPA 815.0 812.7 811.7 811.7 811.5 810.2 807.9 813.5 813.9 816.1 818.3 817.6 818.3 DAY 26 4 13 15 22 6 2 30 30 25 20 2 MIN. QFE PRESSURE IN HPA 799.1 799.0 796.3 799.6 802.0 801.6 800.6 802.5 804.6 808.5 803.7 803.1 796.3 DAY 30 28 29 29 28 28 15 15 11 28 8 10 MEAN QNH PRESSURE IN HPA 990.6 990.0 986.1 989.5 989.8 989.1 986.6 990.7 992.0 996.3 995.7 993.8 990.8 MAX. QNH PRESSURE IN HPA 998.7 996.0 994.8 994.8 994.6 993.1 990.4 997.0 997.4 1000.0 1002.6 1001.8 1002.6 DAY 26 4 13 15 22 6 2 30 30 25 20 2 MIN. QNH PRESSURE IN HPA 980.0 979.9 976.7 980.6 983.4 982.9 981.7 984.0 986.5 991.1 985.4 984.7 976.7 DAY 30 28 29 29 28 28 15 15 11 28 8 10 MEAN QFF PRESSURE IN HPA 995.1 990.4 985.2 984.7 981.2 976.8 971.6 976.8 982.1 990.7 992.5 997.2 985.4 MAX. QFF PRESSURE IN HPA 1007.7 1000.7 994.2 998.0 986.3 981.5 976.5 984.3 992.0 997.0 1001.6 1009.8 1009.8 DAY 26 12 13 1 22 5 2 31 29 25 13 24 MIN. QFF PRESSURE IN HPA 982.5 976.8 975.6 973.6 973.6 969.2 966.0 969.6 974.7 984.7 980.8 982.9 966.0 DAY 30 7 29 29 28 28 15 15 11 17 8 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 808.6 808.3 805.2 808.0 808.3 808.0 806.1 809.4 810.5 813.9 812.9 811.1 809.2 MAX. QFE PRESSURE IN HPA 815.6 813.9 812.4 813.2 812.6 811.1 809.5 815.0 815.6 816.9 818.3 818.5 818.5 DAY 25 12 13 15 22 5 1 30 1 13 20 2 MIN. QFE PRESSURE IN HPA 799.1 799.3 797.6 799.4 802.6 803.6 802.1 805.1 805.7 809.4 804.2 802.9 797.6 DAY 30 28 29 29 28 27 15 14 11 28 8 10 MEAN QNH PRESSURE IN HPA 991.1 990.8 987.1 990.5 990.9 990.5 988.2 992.2 993.5 997.5 996.2 994.2 991.9 MAX. QNH PRESSURE IN HPA 999.4 997.4 995.7 996.6 995.9 994.1 992.2 998.7 999.4 1001.0 1002.6 1002.9 1002.9 DAY 25 12 13 15 22 5 1 30 1 13 20 2 MIN. QNH PRESSURE IN HPA 980.0 980.2 978.2 980.3 984.1 985.3 983.5 987.1 987.8 992.1 986.0 984.5 978.2 DAY 30 28 29 29 28 27 15 14 11 28 8 10 MEAN QFF PRESSURE IN HPA 995.4 991.0 985.8 984.9 981.5 977.8 972.8 978.0 983.0 991.4 992.9 997.4 986.0 MAX. QFF PRESSURE IN HPA 1007.6 1001.4 996.6 999.8 987.0 982.9 977.0 985.5 992.9 997.0 1002.3 1008.7 1008.7 DAY 26 12 13 1 22 2 1 30 29 25 13 24 MIN. QFF PRESSURE IN HPA 980.9 977.4 976.0 972.6 973.4 971.0 966.8 971.6 975.9 985.8 980.7 981.9 966.8 DAY 30 28 29 29 28 27 15 4 11 16 7 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 808.7 807.8 805.3 808.2 808.6 808.4 806.4 809.8 810.7 814.0 813.1 811.0 809.3 MAX. QFE PRESSURE IN HPA 815.9 813.2 812.5 813.1 812.9 811.5 809.5 814.9 815.5 816.9 818.4 818.2 818.4 DAY 25 12 13 15 22 5 31 30 30 25 20 2 MIN. QFE PRESSURE IN HPA 799.3 799.0 798.6 800.3 803.4 803.8 803.5 805.3 806.0 809.2 804.8 802.6 798.6 DAY 30 28 29 29 28 27 14 14 11 28 8 10 MEAN QNH PRESSURE IN HPA 991.3 990.3 987.3 990.7 991.1 990.9 988.6 992.6 993.6 997.5 996.5 994.0 992.1 MAX. QNH PRESSURE IN HPA 999.8 996.6 995.8 996.5 996.3 994.6 992.2 998.6 999.3 1001.0 1002.7 1002.5 1002.7 DAY 25 12 13 15 22 5 31 30 30 25 20 2 MIN. QNH PRESSURE IN HPA 980.2 979.9 979.4 981.4 985.1 985.5 985.2 987.3 988.1 991.9 986.7 984.1 979.4 DAY 30 28 29 29 28 27 14 14 11 28 8 10 MEAN QFF PRESSURE IN HPA 995.0 990.1 985.5 984.7 981.2 977.6 972.2 977.1 981.6 989.3 992.0 996.2 985.2 MAX. QFF PRESSURE IN HPA 1007.1 1001.1 996.6 999.4 987.0 983.1 976.0 984.4 991.8 994.9 1000.9 1007.5 1007.5 DAY 26 12 13 1 22 5 31 7 29 25 30 24 MIN. QFF PRESSURE IN HPA 980.2 974.9 976.5 972.4 973.8 971.4 968.1 970.9 974.3 984.2 979.6 981.7 968.1 DAY 30 28 29 29 28 27 15 4 11 16 7 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -6.2 -4.0 4.9 8.1 12.9 18.4 21.8 21.5 18.3 11.6 4.2 1.2 9.4 MINIMUN AIR TEMPERATURE (C) -10.0 -8.2 1.1 3.9 7.3 10.8 13.7 13.5 10.3 6.7 1.1 -2.5 4.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 29 22 0 0 0 0 0 0 0 0 4 10 65 DAYS WITH FREEZING MIN.<= 0 31 26 17 3 0 0 0 0 0 0 12 23 112 TEMPERATURE RECORDS LOWEST(C) -15.0 -16.0 -2.0 -3.0 3.0 4.0 10.0 10.0 8.0 3.0 -7.0 -11.0 -16.0 DAY 8 6 15 5 1 8 9 16 26 13 25 28 MAXIMUM AIR TEMPERATURE (C) 0.4 2.6 10.4 13.7 19.3 26.4 30.4 30.4 27.4 17.6 8.7 6.9 16.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 7 20 20 3 0 0 0 50 DAYS WITH MAXIMUM TEMP. <= 0 16 10 0 0 0 0 0 0 0 0 0 1 27 TEMPERATURE RECORDS HIGHEST(C) 9.0 9.0 16.0 22.0 25.0 31.0 35.0 34.0 30.0 24.0 16.0 16.0 35.0 DAY 30 28 21 15 29 26 28 6 2 1 1 17 DIF. BETWEEN (MAX.-MIN.) (C) 10.4 10.8 9.3 9.8 12.0 15.6 16.7 16.9 17.1 10.9 7.6 9.4 12.2 MEAN DAILY TEMP. (MDT) (C) -4.8 -2.8 5.8 8.8 13.3 18.6 22.1 22.0 18.8 12.1 4.9 2.2 10.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 4.0 41.0 43.0 0.0 0.0 0.0 0.0 88.0 HEATING DEG. DAYS(BASE 18 0C) 707.0 583.0 379.0 276.0 145.0 32.5 0.0 0.0 4.5 181.5 393.0 489.5 3191.0 DEWPOINT (MEAN C) -7.6 -6.0 -0.9 2.2 5.5 7.8 8.9 8.1 5.6 5.9 2.3 -1.7 2.5 MIXING RATIO (G/KG) 2.84 3.22 4.50 5.63 7.11 8.34 9.04 8.59 7.13 7.22 5.70 4.30 6.13 VAPOUR PRESSURE (HPA) 3.66 4.17 5.80 7.25 9.15 10.71 11.57 11.03 9.20 9.34 7.37 5.56 7.90 SATURATION DEF. (HPA) 0.42 0.71 3.17 4.21 6.37 11.80 16.02 16.06 13.10 5.05 1.22 1.46 6.63 RELATIVE HUMIDITY (MEAN %) 90 87 69 70 63 53 46 45 46 72 89 84 68 RELATIVE HUMIDITY (MAX. %) 96 96 87 87 82 73 65 65 70 87 98 97 84 RELATIVE HUMIDITY (MIN. %) 81 73 49 52 44 35 29 27 27 53 74 63 51 RELATIVE HUMIDITY (MEAN% 03UTC) 89 86 80 83 77 69 61 62 67 83 92 91 78 RELATIVE HUMIDITY (MEAN% 09UTC) 91 82 55 62 50 43 35 32 30 58 86 75 58 RELATIVE HUMIDITY (MEAN% 15UTC) 91 90 63 62 56 42 35 37 40 65 85 82 62 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 68.8 40.6 119.0 99.0 46.1 15.6 0.0 0.0 0.0 37.7 56.2 19.1 502.1 DAYS WITH PRECIPITATION >=10 0 2 4 3 1 0 0 0 0 2 1 1 14 DAYS WITH PRECIPITATION >= 5 7 4 8 4 4 2 0 0 0 3 3 1 36 DAYS WITH PRECIPITATION >= 1 15 7 12 18 10 3 0 0 0 6 12 4 87 DAYS WITH PRECIPITATION 17 9 14 21 13 4 0 3 0 11 15 7 114 GREATEST DAILY PRECIPITATION 8.0 12.0 30.0 29.0 14.0 8.0 0.0 0.0 0.0 16.0 21.3 11.0 30.0 DAY 31 27 31 3 13 5 ** ** ** 18 30 21 DAY WITH THUNDER STORM 0 0 2 0 0 1 0 0 1 3 0 0 7 DAYS WITH SNOW OR SLEET 17 8 4 3 0 0 0 0 0 0 5 6 43 DAYS WITH DUST 0 0 0 0 0 0 1 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 225 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 6.5 6.5 12.0 5.2 5.9 3.3 3.4 2.9 2.8 5.8 3.1 9.1 5.5 PREVAILING WIND PERCENT 8.1 13.8 29.8 22.5 43.1 38.8 28.6 23.8 21.7 32.7 22.1 19.0 25.1 CALMS PERCENT OF WIND 72.6 67.4 31.9 54.6 26.6 23.3 34.3 36.7 37.9 33.5 63.3 58.5 44.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 236 251 251 244 258 258 249 239 240 253 257 255 251 VECTOR WIND MAGNITUDE(KNOTS) 1.0 1.8 5.6 1.5 3.5 1.6 1.5 1.0 1.2 2.6 0.8 2.0 2.0 WIND STEADINESES (MEAN %) 71.4 85.7 84.8 75.0 83.3 66.7 71.4 55.6 70.6 83.9 72.7 71.4 76.9 WIND SPEED (MEAN KNOTS) 1.4 2.1 6.6 2.0 4.2 2.4 2.1 1.8 1.7 3.1 1.1 2.8 2.6 FASTEST WIND DIRECTION 230 330 270 270 230 270 270 50 270 270 270 270 270 FASTEST WIND SPEED (KNOTS) 20 25 35 20 25 10 12 9 10 21 12 30 35 DAY 6 11 13 1 24 5 12 1 27 8 21 20 DAYS WITH SKY CLEAR (0-2)/8 8 15 9 6 7 23 27 26 28 14 9 13 185 DAYS WITH P.CLOUDY (3-6)/8 10 8 14 10 18 5 4 4 2 11 10 14 110 DAYS WITH CLOUDY (7-8)/8 11 4 8 14 6 2 0 1 0 6 11 4 67 DAYS WITH VISIBILITY =< 2 KM 15 10 3 4 2 0 0 0 0 4 8 2 48 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 807.1 810.0 807.7 809.3 809.6 809.3 807.7 809.8 812.6 814.2 811.9 811.0 810.0 MAX. QFE PRESSURE IN HPA 815.5 816.5 815.1 816.2 816.2 813.8 814.5 814.4 815.9 819.4 816.3 816.9 819.4 DAY-HOUR 14-18 8- 3 22- 6 16- 9 11- 6 17-21 5- 6 4- 6 13- 6 30- 6 1- 0 15- 9 MIN. QFE PRESSURE IN HPA 792.1 799.6 796.7 802.3 806.1 803.0 801.6 802.9 808.3 808.0 803.3 802.0 792.1 DAY-HOUR 19-12 27- 6 14-15 1- 0 13-12 5-12 13- 9 8-15 28-15 10-12 18- 3 7- 0 MEAN QNH PRESSURE IN HPA 989.4 992.9 990.2 992.0 992.4 992.0 990.1 992.6 995.9 997.8 995.1 994.0 992.9 MAX. QNH PRESSURE IN HPA 999.3 1000.5 998.9 1000.2 1000.2 997.3 998.1 998.0 999.8 1003.9 1000.3 1001.0 1003.9 DAY-HOUR 14-18 8- 3 22- 6 16- 9 11- 6 17-21 5- 6 4- 6 13- 6 30- 6 1- 0 15- 9 MIN. QNH PRESSURE IN HPA 971.7 980.6 977.1 983.8 988.2 984.6 982.9 984.5 990.8 990.5 984.9 983.4 971.7 DAY-HOUR 19-12 27- 6 14-15 1- 0 13-12 5-12 13- 9 8-15 28-15 10-12 18- 3 7- 0 MEAN QFF PRESSURE IN HPA 995.8 997.8 988.2 987.8 984.8 980.7 976.5 979.3 984.8 991.2 993.7 994.9 988.0 MAX. QFF PRESSURE IN HPA 1008.6 1011.3 999.7 993.7 990.9 988.2 988.0 985.7 989.7 1000.7 1005.0 1006.8 1011.3 DAY-HOUR 14-18 8- 6 2- 6 5- 9 11- 6 8- 6 5- 6 16- 3 22- 6 31- 6 24- 3 30- 6 MIN. QFF PRESSURE IN HPA 974.5 979.8 977.8 981.2 980.6 973.4 969.4 969.1 979.5 980.8 983.8 980.5 969.1 DAY-HOUR 19- 9 27- 6 14-15 20- 0 24- 3 29-12 13- 9 8-15 28-21 10-12 18- 3 20- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 807.1 809.8 808.0 809.0 809.2 809.3 807.7 809.8 812.6 814.1 812.1 810.8 810.0 MAX. QFE PRESSURE IN HPA 814.2 816.1 814.3 815.0 814.7 812.6 813.1 813.3 814.8 818.5 816.3 816.0 818.5 DAY 15 20 2 17 11 18 5 31 13 30 1 18 MIN. QFE PRESSURE IN HPA 795.8 800.0 801.5 802.3 806.2 805.5 803.4 804.7 809.6 809.1 803.9 802.0 795.8 DAY 20 27 15 1 1 7 12 9 28 11 18 7 MEAN QNH PRESSURE IN HPA 989.4 992.7 990.4 991.7 991.9 992.0 990.1 992.6 995.9 997.7 995.3 993.8 992.8 MAX. QNH PRESSURE IN HPA 997.8 1000.0 997.9 998.7 998.4 995.9 996.5 996.7 998.5 1002.9 1000.3 999.9 1002.9 DAY 15 20 2 17 11 18 5 31 13 30 1 18 MIN. QNH PRESSURE IN HPA 976.1 981.0 982.8 983.8 988.4 987.5 985.1 986.6 992.4 991.8 985.6 983.4 976.1 DAY 20 27 15 1 1 7 12 9 28 11 18 7 MEAN QFF PRESSURE IN HPA 995.0 996.9 988.2 987.3 984.3 980.5 976.2 978.6 984.4 990.7 993.3 994.0 987.4 MAX. QFF PRESSURE IN HPA 1004.8 1007.4 997.7 993.0 990.0 986.6 984.3 984.9 987.6 998.6 1004.1 1003.9 1007.4 DAY 15 20 2 5 11 8 5 16 23 13 24 30 MIN. QFF PRESSURE IN HPA 978.3 981.0 979.3 981.2 981.1 975.2 971.1 971.2 982.2 982.7 984.1 980.5 971.1 DAY 31 27 7 20 24 30 12 8 15 10 18 20 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 806.9 809.7 807.7 809.0 809.2 809.3 807.8 810.0 812.9 814.2 812.0 810.9 810.0 MAX. QFE PRESSURE IN HPA 813.9 816.5 814.2 815.0 814.7 812.9 814.1 813.9 815.6 818.7 816.2 815.5 818.7 DAY 14 8 2 17 11 18 5 4 13 30 24 18 MIN. QFE PRESSURE IN HPA 794.0 800.0 800.9 803.3 806.2 806.5 802.8 804.8 809.5 808.9 803.3 802.0 794.0 DAY 19 27 7 1 1 7 2 8 28 11 18 7 MEAN QNH PRESSURE IN HPA 989.2 992.5 990.1 991.7 991.9 992.1 990.3 992.9 996.3 997.8 995.2 993.9 992.8 MAX. QNH PRESSURE IN HPA 997.4 1000.5 997.8 998.7 998.4 996.3 997.7 997.4 999.4 1003.1 1000.2 999.3 1003.1 DAY 14 8 2 17 11 18 5 4 13 30 24 18 MIN. QNH PRESSURE IN HPA 974.0 981.0 982.1 984.9 988.4 988.7 984.3 986.7 992.2 991.5 984.9 983.4 974.0 DAY 19 27 7 1 1 7 2 8 28 11 18 7 MEAN QFF PRESSURE IN HPA 996.5 998.5 988.7 988.1 985.3 981.6 977.5 980.5 986.4 991.8 994.2 995.5 988.7 MAX. QFF PRESSURE IN HPA 1007.6 1011.2 998.4 993.3 990.8 987.8 986.9 985.7 989.5 998.9 1005.0 1005.8 1011.2 DAY 14 8 2 5 11 8 5 16 22 31 24 30 MIN. QFF PRESSURE IN HPA 977.7 981.1 979.1 981.9 980.6 976.4 971.3 971.4 983.6 982.4 983.8 981.0 971.3 DAY 19 27 7 20 24 28 2 8 28 10 18 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 807.7 810.4 808.5 809.7 810.1 810.0 808.6 810.9 813.6 815.0 812.4 811.6 810.7 MAX. QFE PRESSURE IN HPA 814.4 816.4 815.1 815.7 816.2 813.6 814.5 814.4 815.9 819.4 815.7 816.2 819.4 DAY 14 8 22 16 11 18 5 4 13 30 14 14 MIN. QFE PRESSURE IN HPA 793.4 799.6 800.4 805.7 806.6 805.5 804.3 804.8 809.0 809.8 804.4 802.5 793.4 DAY 19 27 14 3 5 5 15 8 28 10 18 7 MEAN QNH PRESSURE IN HPA 990.2 993.3 991.1 992.5 993.0 992.8 991.2 993.9 997.1 998.7 995.7 994.7 993.7 MAX. QNH PRESSURE IN HPA 998.0 1000.4 998.9 999.6 1000.2 997.1 998.1 998.0 999.8 1003.9 999.6 1000.2 1003.9 DAY 14 8 22 16 11 18 5 4 13 30 14 14 MIN. QNH PRESSURE IN HPA 973.3 980.6 981.5 987.8 988.8 987.5 986.1 986.7 991.7 992.6 986.2 984.0 973.3 DAY 19 27 14 3 5 5 15 8 28 10 18 7 MEAN QFF PRESSURE IN HPA 997.4 998.7 989.5 988.5 985.4 981.5 977.8 981.3 986.6 992.6 994.6 996.2 989.2 MAX. QFF PRESSURE IN HPA 1008.1 1011.3 999.7 993.7 990.9 988.2 988.0 985.5 989.7 1000.7 1002.6 1006.8 1011.3 DAY 14 8 2 5 11 8 5 16 22 31 24 30 MIN. QFF PRESSURE IN HPA 976.3 979.8 980.3 983.2 980.8 975.6 972.6 971.6 983.2 983.0 984.8 981.9 971.6 DAY 19 27 25 20 5 28 12 8 14 10 18 20 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 807.4 810.4 808.2 809.8 810.1 809.7 808.3 810.5 813.3 814.8 812.3 811.7 810.5 MAX. QFE PRESSURE IN HPA 814.6 816.4 814.6 816.2 815.8 813.5 814.0 814.1 815.7 819.4 816.3 816.9 819.4 DAY 14 7 2 16 11 17 5 4 13 30 24 15 MIN. QFE PRESSURE IN HPA 792.9 802.3 799.7 805.0 806.9 804.4 801.6 804.0 808.9 809.0 805.5 804.9 792.9 DAY 19 27 14 7 7 5 13 8 28 10 18 9 MEAN QNH PRESSURE IN HPA 989.8 993.3 990.7 992.5 993.0 992.5 990.8 993.4 996.7 998.4 995.6 994.8 993.5 MAX. QNH PRESSURE IN HPA 998.3 1000.4 998.3 1000.2 999.7 997.0 997.6 997.7 999.6 1003.9 1000.3 1001.0 1003.9 DAY 14 7 2 16 11 17 5 4 13 30 24 15 MIN. QNH PRESSURE IN HPA 972.7 983.8 980.7 986.9 989.2 986.2 982.9 985.8 991.5 991.7 987.5 986.8 972.7 DAY 19 27 14 7 7 5 13 8 28 10 18 9 MEAN QFF PRESSURE IN HPA 995.4 997.6 988.2 988.0 984.8 980.7 976.7 979.2 984.2 991.2 993.9 995.4 987.9 MAX. QFF PRESSURE IN HPA 1006.9 1009.4 996.7 993.7 990.0 986.7 986.0 984.5 987.7 998.0 1004.1 1004.5 1009.4 DAY 14 8 2 5 11 8 5 31 23 13 24 29 MIN. QFF PRESSURE IN HPA 974.5 982.7 979.2 984.4 982.8 975.0 969.4 970.1 979.7 981.4 985.9 982.5 969.4 DAY 19 27 7 19 20 28 13 8 14 10 18 20 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 806.4 809.7 807.0 808.8 809.4 808.7 807.0 809.0 811.7 813.4 811.3 810.2 809.4 MAX. QFE PRESSURE IN HPA 814.4 815.5 814.4 815.1 814.8 813.1 812.5 813.4 814.4 818.0 814.6 815.2 818.0 DAY 14 19 2 16 11 17 30 4 9 30 24 14 MIN. QFE PRESSURE IN HPA 792.1 802.3 797.8 803.9 806.1 803.0 802.3 803.1 808.5 808.0 806.3 803.5 792.1 DAY 19 11 14 3 13 5 14 8 28 10 18 6 MEAN QNH PRESSURE IN HPA 988.6 992.5 989.3 991.5 992.1 991.3 989.3 991.7 994.9 996.8 994.4 993.1 992.1 MAX. QNH PRESSURE IN HPA 998.0 999.3 998.0 998.9 998.5 996.5 995.8 996.8 998.0 1002.3 998.3 999.0 1002.3 DAY 14 19 2 16 11 17 30 4 9 30 24 14 MIN. QNH PRESSURE IN HPA 971.7 983.8 978.4 985.6 988.2 984.6 983.8 984.7 991.1 990.5 988.5 985.2 971.7 DAY 19 11 14 3 13 5 14 8 28 10 18 6 MEAN QFF PRESSURE IN HPA 993.9 996.5 987.0 986.9 984.2 979.5 975.2 977.5 983.3 989.7 992.4 993.1 986.6 MAX. QFF PRESSURE IN HPA 1005.7 1006.5 997.1 991.8 989.6 985.4 981.5 982.1 987.0 997.9 1000.8 1001.3 1006.5 DAY 14 19 2 5 27 6 5 31 23 12 23 29 MIN. QFF PRESSURE IN HPA 974.6 984.1 978.3 982.5 981.2 973.4 969.7 969.9 979.7 980.8 987.6 982.5 969.7 DAY 19 26 14 19 24 29 14 8 14 10 7 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 806.8 809.9 806.9 808.7 809.1 808.4 806.6 808.8 811.4 813.5 811.3 810.5 809.3 MAX. QFE PRESSURE IN HPA 815.0 816.2 814.3 814.3 813.9 813.1 811.7 812.4 813.9 818.0 814.6 815.3 818.0 DAY 14 7 2 16 10 17 29 4 9 30 23 15 MIN. QFE PRESSURE IN HPA 793.3 801.0 796.7 804.3 806.1 805.2 802.0 802.9 808.3 808.0 807.2 803.5 793.3 DAY 19 26 14 7 13 5 14 8 28 10 17 6 MEAN QNH PRESSURE IN HPA 989.1 992.7 989.2 991.3 991.7 991.0 988.8 991.4 994.5 997.0 994.4 993.5 992.0 MAX. QNH PRESSURE IN HPA 998.7 1000.2 997.9 997.9 997.4 996.5 994.8 995.7 997.4 1002.3 998.3 999.1 1002.3 DAY 14 7 2 16 10 17 29 4 9 30 23 15 MIN. QNH PRESSURE IN HPA 973.1 982.2 977.1 986.1 988.2 987.2 983.4 984.5 990.8 990.5 989.5 985.2 973.1 DAY 19 26 14 7 13 5 14 8 28 10 17 6 MEAN QFF PRESSURE IN HPA 996.3 998.5 987.7 987.5 984.8 980.3 975.7 978.8 984.4 990.9 993.4 995.0 987.8 MAX. QFF PRESSURE IN HPA 1007.6 1009.9 998.5 992.7 989.8 985.0 981.5 984.9 987.7 998.4 1001.9 1003.5 1009.9 DAY 14 7 1 5 10 17 5 31 22 12 23 29 MIN. QFF PRESSURE IN HPA 976.6 982.2 977.8 982.1 981.4 975.1 970.7 969.1 980.9 982.4 987.8 984.5 969.1 DAY 19 26 14 19 24 27 14 8 6 10 7 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 807.2 810.3 807.8 809.5 809.8 809.4 807.7 809.8 812.4 814.3 812.0 811.2 810.1 MAX. QFE PRESSURE IN HPA 815.5 815.7 814.5 814.2 814.4 813.4 813.7 813.3 815.0 818.8 815.9 816.1 818.8 DAY 14 19 1 15 10 17 30 3 9 30 23 17 MIN. QFE PRESSURE IN HPA 794.5 800.9 797.8 804.6 806.4 806.1 803.8 804.2 809.1 810.3 805.8 803.9 794.5 DAY 19 26 14 3 13 27 11 8 28 22 17 6 MEAN QNH PRESSURE IN HPA 989.6 993.2 990.2 992.2 992.6 992.1 990.1 992.6 995.7 997.9 995.2 994.2 993.0 MAX. QNH PRESSURE IN HPA 999.3 999.6 998.1 997.8 998.0 996.8 997.2 996.7 998.7 1003.2 999.8 1000.0 1003.2 DAY 14 19 1 15 10 17 30 3 9 30 23 17 MIN. QNH PRESSURE IN HPA 974.6 982.1 978.4 986.5 988.6 988.2 985.5 986.0 991.8 993.2 987.9 985.6 974.6 DAY 19 26 14 3 13 27 11 8 28 22 17 6 MEAN QFF PRESSURE IN HPA 996.7 998.5 988.6 988.2 984.9 980.9 976.8 980.0 985.4 991.8 994.1 995.7 988.5 MAX. QFF PRESSURE IN HPA 1008.6 1009.0 998.4 992.1 988.9 987.4 984.2 984.8 989.5 1000.2 1004.1 1006.2 1009.0 DAY 14 7 1 4 10 7 4 21 30 30 23 29 MIN. QFF PRESSURE IN HPA 977.5 981.8 979.7 981.3 981.1 974.9 972.0 970.4 981.7 982.1 987.0 981.1 970.4 DAY 19 26 14 19 31 27 21 13 6 8 17 19 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 807.1 810.2 807.9 809.8 810.1 809.7 808.1 810.1 812.7 814.5 812.1 811.2 810.3 MAX. QFE PRESSURE IN HPA 814.8 816.0 814.5 815.7 815.0 813.8 813.7 813.3 815.6 819.3 816.3 816.0 819.3 DAY 14 19 1 16 10 17 29 3 9 30 23 17 MIN. QFE PRESSURE IN HPA 795.0 799.7 800.3 804.6 806.9 806.8 803.4 804.7 809.5 810.4 805.1 803.6 795.0 DAY 19 26 14 3 13 5 12 8 28 22 17 6 MEAN QNH PRESSURE IN HPA 989.4 993.1 990.4 992.5 993.0 992.5 990.6 992.9 996.1 998.1 995.3 994.2 993.2 MAX. QNH PRESSURE IN HPA 998.5 999.9 998.1 999.6 998.7 997.3 997.2 996.7 999.4 1003.8 1000.3 999.9 1003.8 DAY 14 19 1 16 10 17 29 3 9 30 23 17 MIN. QNH PRESSURE IN HPA 975.1 980.7 981.4 986.5 989.2 989.1 985.1 986.6 992.2 993.3 987.1 985.3 975.1 DAY 19 26 14 3 13 5 12 8 28 22 17 6 MEAN QFF PRESSURE IN HPA 995.3 997.4 987.9 988.0 984.8 980.9 976.6 978.9 983.7 991.0 993.7 994.9 987.8 MAX. QFF PRESSURE IN HPA 1006.2 1007.7 997.9 993.4 989.0 987.0 984.1 983.7 987.9 999.8 1004.2 1005.9 1007.7 DAY 14 19 1 4 10 7 4 31 30 12 23 29 MIN. QFF PRESSURE IN HPA 976.7 980.7 979.4 982.0 981.6 975.2 971.0 971.5 979.5 982.7 985.4 982.3 971.0 DAY 19 26 6 19 31 27 12 13 28 9 17 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.4 0.7 8.4 13.3 15.6 19.9 23.7 24.1 19.1 13.6 3.2 1.0 11.9 MINIMUN AIR TEMPERATURE (C) -2.5 -4.4 3.9 8.2 8.4 11.6 14.6 15.0 10.6 6.9 -1.9 -2.2 5.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 11 14 0 0 0 0 0 0 0 0 10 15 50 DAYS WITH FREEZING MIN.<= 0 27 27 5 1 0 0 0 0 0 0 18 24 102 TEMPERATURE RECORDS LOWEST(C) -7.0 -15.0 -2.0 0.0 4.0 8.0 8.0 12.0 7.0 3.0 -14.0 -9.0 -15.0 DAY 1 2 25 13 6 3 14 28 23 13 23 17 MAXIMUM AIR TEMPERATURE (C) 5.3 7.3 14.5 19.4 23.6 27.9 32.2 33.1 28.2 21.4 10.3 6.3 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 12 25 30 12 0 0 0 79 DAYS WITH MAXIMUM TEMP. <= 0 3 1 0 0 0 0 0 0 0 0 1 2 7 TEMPERATURE RECORDS HIGHEST(C) 12.0 13.0 19.0 27.0 28.0 32.0 37.0 35.0 34.0 28.0 17.0 13.0 37.0 DAY 13 20 21 26 15 28 30 1 1 1 4 8 DIF. BETWEEN (MAX.-MIN.) (C) 7.8 11.7 10.6 11.2 15.2 16.3 17.6 18.1 17.6 14.5 12.2 8.5 13.4 MEAN DAILY TEMP. (MDT) (C) 1.4 1.4 9.2 13.8 16.0 19.7 23.4 24.0 19.4 14.1 4.2 2.1 12.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 13.0 89.0 94.5 11.5 0.0 0.0 0.0 208.0 HEATING DEG. DAYS(BASE 18 0C) 514.0 464.0 273.5 127.5 71.5 8.5 1.0 0.0 14.0 121.5 414.0 493.5 2503.0 DEWPOINT (MEAN C) -1.7 -2.9 1.0 3.7 3.6 6.4 6.1 7.1 2.5 0.3 -3.0 -3.0 1.7 MIXING RATIO (G/KG) 4.22 3.93 5.16 6.34 6.33 7.64 7.54 7.97 5.76 4.92 3.99 3.91 5.64 VAPOUR PRESSURE (HPA) 5.45 5.09 6.65 8.16 8.18 9.80 9.65 10.21 7.43 6.38 5.18 5.07 7.27 SATURATION DEF. (HPA) 1.07 1.80 4.77 7.93 10.48 14.80 21.49 21.60 16.26 10.01 3.11 1.79 9.59 RELATIVE HUMIDITY (MEAN %) 87 80 62 54 48 45 35 37 36 44 67 77 56 RELATIVE HUMIDITY (MAX. %) 98 94 82 69 71 68 56 58 56 64 88 91 75 RELATIVE HUMIDITY (MIN. %) 69 62 45 42 28 26 20 21 20 26 44 59 39 RELATIVE HUMIDITY (MEAN% 03UTC) 89 88 73 62 66 65 55 56 53 60 83 83 69 RELATIVE HUMIDITY (MEAN% 09UTC) 84 73 53 48 34 30 24 26 24 30 54 69 46 RELATIVE HUMIDITY (MEAN% 15UTC) 85 74 56 48 37 32 24 25 25 38 63 78 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 30.0 16.0 51.0 6.8 8.5 19.3 0.0 0.0 0.0 6.1 24.9 103.2 265.8 DAYS WITH PRECIPITATION >=10 0 1 1 0 0 0 0 0 0 0 1 4 7 DAYS WITH PRECIPITATION >= 5 1 1 5 0 0 2 0 0 0 0 2 4 15 DAYS WITH PRECIPITATION >= 1 12 3 9 3 7 6 0 0 0 3 5 6 54 DAYS WITH PRECIPITATION 13 3 12 6 11 10 1 0 0 6 9 13 84 GREATEST DAILY PRECIPITATION 9.0 14.0 19.0 2.2 2.0 6.0 0.0 0.0 0.0 4.0 11.0 34.0 34.0 DAY 30 23 7 18 26 1 ** ** ** 29 22 9 DAY WITH THUNDER STORM 0 0 1 0 9 4 0 0 0 3 0 0 17 DAYS WITH SNOW OR SLEET 10 2 2 0 0 0 0 0 0 0 3 5 22 DAYS WITH DUST 1 0 0 1 1 0 0 1 0 3 0 0 7 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 8.9 7.7 10.1 14.9 6.2 5.0 4.6 3.2 3.5 7.5 6.7 8.2 7.7 PREVAILING WIND PERCENT 27.0 30.8 57.3 57.9 35.1 42.5 35.9 31.5 36.7 37.9 20.4 19.0 36.0 CALMS PERCENT OF WIND 63.7 52.7 27.8 30.0 46.4 28.3 25.4 26.2 22.5 22.6 57.1 63.7 38.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 267 264 265 267 261 271 262 206 279 257 273 260 265 VECTOR WIND MAGNITUDE(KNOTS) 2.5 2.6 6.4 9.3 2.3 2.1 1.2 0.3 1.3 2.6 1.4 1.7 2.8 WIND STEADINESES (MEAN %) 89.3 86.7 91.4 93.9 76.7 65.6 38.7 11.5 52.0 59.1 70.0 77.3 73.7 WIND SPEED (MEAN KNOTS) 2.8 3.0 7.0 9.9 3.0 3.2 3.1 2.6 2.5 4.4 2.0 2.2 3.8 FASTEST WIND DIRECTION 270 270 270 270 230 270 270 130 270 270 270 270 270 FASTEST WIND SPEED (KNOTS) 37 24 45 60 30 15 20 18 17 45 35 25 60 DAY 31 3 23 20 3 3 10 1 30 28 20 9 DAYS WITH SKY CLEAR (0-2)/8 6 19 12 9 13 26 28 29 30 23 12 11 218 DAYS WITH P.CLOUDY (3-6)/8 13 8 12 11 16 4 3 2 0 8 10 10 97 DAYS WITH CLOUDY (7-8)/8 12 1 7 10 2 0 0 0 0 0 8 10 50 DAYS WITH VISIBILITY =< 2 KM 7 2 4 1 0 0 0 1 0 0 3 11 29 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 809.4 810.7 808.6 809.6 812.1 808.4 806.3 808.0 810.1 812.6 813.8 810.7 810.0 MAX. QFE PRESSURE IN HPA 817.6 819.9 814.2 839.7 821.5 812.8 812.0 812.6 813.9 819.8 820.0 817.3 839.7 DAY-HOUR 14- 9 10- 6 1- 6 8-15 13- 9 3- 3 16- 6 19- 6 24-21 22- 9 4- 6 5- 9 MIN. QFE PRESSURE IN HPA 797.2 801.9 801.1 799.4 806.2 803.3 798.4 801.4 804.8 806.8 805.4 803.1 797.2 DAY-HOUR 31-12 6- 0 25- 0 20- 6 1- 3 18- 9 9-15 7-15 10-12 28- 0 30-21 1-12 MEAN QNH PRESSURE IN HPA 992.1 993.6 991.1 992.4 995.4 991.0 988.4 990.4 992.9 995.9 997.3 993.7 992.9 MAX. QNH PRESSURE IN HPA 1001.8 1004.5 997.8 1027.8 1006.4 996.1 995.2 995.9 997.4 1004.4 1004.6 1001.4 1027.8 DAY-HOUR 14- 9 10- 6 1- 6 8-15 13- 9 3- 3 16- 6 19- 6 24-21 22- 9 4- 6 5- 9 MIN. QNH PRESSURE IN HPA 977.7 983.3 982.3 980.3 988.4 984.9 979.2 982.7 986.7 989.1 987.4 984.7 977.7 DAY-HOUR 31-12 6- 0 25- 0 20- 6 1- 3 18- 9 9-15 7-15 10-12 28- 0 30-21 1-12 MEAN QFF PRESSURE IN HPA 993.5 995.0 986.7 984.6 986.2 978.8 973.8 975.5 981.4 988.2 996.9 994.8 986.3 MAX. QFF PRESSURE IN HPA 1003.4 1009.5 996.1 1023.0 997.8 986.1 982.4 982.8 988.6 997.1 1010.4 1004.2 1023.0 DAY-HOUR 12- 6 10- 6 1- 6 8-15 13- 9 13- 3 14- 6 19- 3 25- 3 31-18 23- 6 26- 6 MIN. QFF PRESSURE IN HPA 980.0 985.3 976.0 970.6 978.5 970.9 966.0 967.8 973.4 979.7 985.1 981.1 966.0 DAY-HOUR 30- 3 6- 0 23-12 20- 6 26-12 18- 9 9- 9 2-12 10-12 28- 0 20-21 9-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 809.6 810.5 808.2 809.5 812.0 808.8 806.5 808.2 810.1 812.6 814.1 810.6 810.1 MAX. QFE PRESSURE IN HPA 815.7 815.3 813.4 815.5 819.2 812.0 810.3 812.0 813.0 818.2 819.6 815.5 819.6 DAY 14 19 1 2 13 13 16 19 25 23 9 6 MIN. QFE PRESSURE IN HPA 800.6 801.9 801.1 800.7 806.4 805.4 799.7 803.2 806.3 806.8 808.5 804.0 799.7 DAY 31 6 25 20 1 20 10 7 10 28 21 1 MEAN QNH PRESSURE IN HPA 992.4 993.4 990.7 992.3 995.1 991.5 988.7 990.8 992.9 995.9 997.6 993.5 992.9 MAX. QNH PRESSURE IN HPA 999.6 999.1 996.8 999.3 1003.7 995.2 993.2 995.2 996.4 1002.5 1004.2 999.3 1004.2 DAY 14 19 1 2 13 13 16 19 25 23 9 6 MIN. QNH PRESSURE IN HPA 981.7 983.3 982.3 981.9 988.6 987.4 980.7 984.8 988.5 989.1 991.1 985.8 980.7 DAY 31 6 25 20 1 20 10 7 10 28 21 1 MEAN QFF PRESSURE IN HPA 992.9 994.2 985.8 984.2 985.8 979.3 974.1 975.6 981.2 987.7 996.4 993.8 985.9 MAX. QFF PRESSURE IN HPA 999.6 1001.2 993.7 993.4 994.9 985.1 981.1 981.8 987.6 994.1 1008.0 1001.4 1008.0 DAY 12 2 1 25 13 13 14 19 25 23 23 20 MIN. QFF PRESSURE IN HPA 983.1 985.3 976.4 973.3 979.5 973.1 968.4 969.3 975.0 979.7 988.7 982.2 968.4 DAY 30 6 24 20 1 20 9 2 10 28 30 9 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 809.2 810.4 808.6 809.6 812.3 809.0 806.8 808.7 810.3 812.7 813.9 810.6 810.2 MAX. QFE PRESSURE IN HPA 815.8 815.0 813.4 815.7 820.1 812.8 811.3 812.1 813.0 818.3 818.7 815.1 820.1 DAY 14 19 1 2 13 3 16 19 25 23 4 6 MIN. QFE PRESSURE IN HPA 799.4 801.9 802.3 800.1 806.2 805.4 799.8 803.7 806.9 807.1 807.3 804.2 799.4 DAY 30 6 9 20 1 20 10 7 10 28 30 1 MEAN QNH PRESSURE IN HPA 991.9 993.3 991.2 992.4 995.5 991.6 989.0 991.3 993.2 996.0 997.5 993.6 993.0 MAX. QNH PRESSURE IN HPA 999.7 998.7 996.8 999.6 1004.7 996.1 994.4 995.3 996.4 1002.6 1003.1 998.9 1004.7 DAY 14 19 1 2 13 3 16 19 25 23 4 6 MIN. QNH PRESSURE IN HPA 980.3 983.3 983.8 981.2 988.4 987.4 980.8 985.4 989.2 989.4 989.7 986.0 980.3 DAY 30 6 9 20 1 20 10 7 10 28 30 1 MEAN QFF PRESSURE IN HPA 993.7 995.4 987.6 985.2 987.3 980.4 975.4 977.5 982.9 989.3 997.9 995.1 987.3 MAX. QFF PRESSURE IN HPA 1001.6 1001.0 995.0 995.6 997.6 986.1 982.2 982.8 988.6 995.6 1009.7 1003.0 1009.7 DAY 12 8 1 24 13 13 14 19 25 23 23 20 MIN. QFF PRESSURE IN HPA 980.0 986.4 978.3 972.5 980.8 974.8 968.2 971.7 976.6 980.9 988.1 983.2 968.2 DAY 30 6 24 20 1 20 9 7 1 28 30 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 809.8 811.4 809.5 810.1 812.8 809.2 807.2 809.1 811.1 813.6 814.7 811.5 810.8 MAX. QFE PRESSURE IN HPA 816.1 819.9 814.2 816.0 820.9 812.4 812.0 812.6 813.8 819.6 820.0 816.3 820.9 DAY 14 10 1 24 13 2 16 19 24 22 4 5 MIN. QFE PRESSURE IN HPA 798.7 804.1 803.3 799.4 808.2 805.2 800.2 804.4 807.2 808.3 807.0 803.7 798.7 DAY 31 3 23 20 1 20 10 7 10 28 30 1 MEAN QNH PRESSURE IN HPA 992.6 994.5 992.2 993.0 996.1 991.9 989.5 991.8 994.1 997.1 998.4 994.6 993.8 MAX. QNH PRESSURE IN HPA 1000.0 1004.5 997.8 999.9 1005.7 995.7 995.2 995.9 997.3 1004.2 1004.6 1000.3 1005.7 DAY 14 10 1 24 13 2 16 19 24 22 4 5 MIN. QNH PRESSURE IN HPA 979.5 985.9 984.9 980.3 990.7 987.2 981.3 986.2 989.5 990.8 989.3 985.4 979.5 DAY 31 3 23 20 1 20 10 7 10 28 30 1 MEAN QFF PRESSURE IN HPA 994.5 996.7 988.3 985.6 986.9 979.4 974.8 976.8 982.6 989.5 998.8 996.4 987.5 MAX. QFF PRESSURE IN HPA 1003.4 1009.5 996.1 994.1 997.1 985.6 982.4 982.3 987.7 997.1 1010.4 1004.2 1010.4 DAY 12 10 1 24 13 3 14 19 24 22 23 26 MIN. QFF PRESSURE IN HPA 981.8 989.1 978.3 970.6 980.3 972.7 967.8 971.5 975.0 982.1 987.4 984.1 967.8 DAY 30 3 23 20 26 20 9 7 1 28 30 9 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 810.1 811.2 809.2 810.1 812.6 808.5 806.4 808.2 810.3 812.9 814.3 811.1 810.4 MAX. QFE PRESSURE IN HPA 817.6 816.3 814.2 817.0 821.5 812.0 811.2 811.3 813.0 819.8 819.5 817.3 821.5 DAY 14 18 1 24 13 4 15 19 24 22 4 5 MIN. QFE PRESSURE IN HPA 799.9 803.8 802.0 801.2 808.0 803.3 799.2 803.2 806.0 808.5 807.9 803.5 799.2 DAY 31 3 24 20 1 18 9 7 10 28 30 1 MEAN QNH PRESSURE IN HPA 993.0 994.3 991.9 992.9 995.9 991.0 988.6 990.7 993.2 996.3 997.9 994.1 993.3 MAX. QNH PRESSURE IN HPA 1001.8 1000.3 997.8 1001.1 1006.4 995.2 994.3 994.4 996.4 1004.4 1004.0 1001.4 1006.4 DAY 14 18 1 24 13 4 15 19 24 22 4 5 MIN. QNH PRESSURE IN HPA 980.9 985.5 983.4 982.5 990.5 984.9 980.1 984.8 988.1 991.1 990.4 985.2 980.1 DAY 31 3 24 20 1 18 9 7 10 28 30 1 MEAN QFF PRESSURE IN HPA 994.1 995.1 986.9 984.7 986.1 978.1 973.3 974.9 980.6 987.3 996.8 994.9 986.1 MAX. QFF PRESSURE IN HPA 1002.7 1001.9 993.5 994.7 997.8 984.2 981.3 980.2 986.5 995.9 1007.8 1002.8 1007.8 DAY 12 1 1 24 13 13 14 4 27 22 23 19 MIN. QFF PRESSURE IN HPA 981.4 988.0 976.5 971.5 979.0 970.9 966.0 969.4 973.8 980.8 988.9 982.4 966.0 DAY 30 3 24 20 26 18 9 2 10 28 30 9 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 808.8 810.1 808.0 808.9 811.5 807.5 805.3 806.8 809.0 811.6 813.0 810.0 809.2 MAX. QFE PRESSURE IN HPA 815.1 815.5 811.8 815.3 819.4 811.2 810.0 809.6 812.0 818.2 817.8 815.5 819.4 DAY 13 18 1 24 13 4 15 4 24 22 4 5 MIN. QFE PRESSURE IN HPA 797.2 802.7 801.8 802.1 806.8 803.9 798.6 801.7 804.8 808.0 805.9 803.1 797.2 DAY 31 5 14 20 1 8 9 7 10 15 30 1 MEAN QNH PRESSURE IN HPA 991.5 992.9 990.5 991.6 994.6 989.9 987.3 989.0 991.6 994.8 996.4 992.8 991.9 MAX. QNH PRESSURE IN HPA 998.9 999.3 995.0 999.1 1003.9 994.3 992.8 992.4 995.2 1002.5 1002.0 999.3 1003.9 DAY 13 18 1 24 13 4 15 4 24 22 4 5 MIN. QNH PRESSURE IN HPA 977.7 984.2 983.2 983.5 989.1 985.6 979.4 983.0 986.7 990.5 988.0 984.7 977.7 DAY 31 5 14 20 1 8 9 7 10 15 30 1 MEAN QFF PRESSURE IN HPA 991.9 993.3 985.4 983.1 985.2 977.6 972.5 973.8 979.9 986.7 995.1 993.0 984.8 MAX. QFF PRESSURE IN HPA 999.6 999.1 991.2 992.9 995.0 984.0 978.6 978.8 985.9 994.0 1005.8 1000.8 1005.8 DAY 12 13 1 24 13 3 14 18 24 22 23 19 MIN. QFF PRESSURE IN HPA 980.1 985.6 976.0 973.5 978.5 971.9 967.0 967.8 973.4 982.4 985.4 981.1 967.0 DAY 30 22 23 20 26 20 9 2 10 28 30 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 809.0 810.3 808.0 809.8 811.5 807.4 805.0 806.6 809.1 812.0 813.2 810.5 809.4 MAX. QFE PRESSURE IN HPA 815.4 815.0 812.1 839.7 818.9 810.7 809.5 809.9 812.1 818.6 818.1 816.5 839.7 DAY 12 18 31 8 13 3 15 19 27 22 4 5 MIN. QFE PRESSURE IN HPA 798.4 802.1 801.7 802.8 806.8 803.6 798.4 801.4 805.3 808.4 805.9 804.0 798.4 DAY 31 5 14 20 1 20 9 7 10 14 30 1 MEAN QNH PRESSURE IN HPA 991.7 993.1 990.5 992.6 994.6 989.8 987.0 988.8 991.8 995.2 996.6 993.4 992.1 MAX. QNH PRESSURE IN HPA 999.2 998.7 995.3 1027.8 1003.3 993.7 992.2 992.7 995.3 1003.0 1002.4 1000.5 1027.8 DAY 12 18 31 8 13 3 15 19 27 22 4 5 MIN. QNH PRESSURE IN HPA 979.2 983.5 983.0 984.3 989.1 985.3 979.2 982.7 987.3 990.9 988.0 985.8 979.2 DAY 31 5 14 20 1 20 9 7 10 14 30 1 MEAN QFF PRESSURE IN HPA 993.5 994.9 986.7 985.3 986.3 978.4 973.3 975.0 981.4 988.6 997.0 995.0 986.3 MAX. QFF PRESSURE IN HPA 1002.4 1001.3 992.5 1023.0 995.0 984.1 979.3 979.8 987.1 995.9 1008.0 1001.8 1023.0 DAY 12 1 7 8 13 12 15 19 27 22 22 19 MIN. QFF PRESSURE IN HPA 981.1 987.8 977.4 975.1 979.8 973.7 967.0 968.9 975.1 984.7 987.1 982.8 967.0 DAY 30 22 14 20 30 30 9 7 1 27 30 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 809.5 810.9 808.7 809.5 812.3 808.5 806.4 807.9 810.2 812.8 813.6 810.9 810.1 MAX. QFE PRESSURE IN HPA 815.7 816.5 812.6 815.2 819.3 811.7 811.0 812.0 813.2 819.0 818.9 816.4 819.3 DAY 13 18 27 24 13 12 15 18 27 22 4 5 MIN. QFE PRESSURE IN HPA 799.4 802.5 803.5 802.6 808.0 804.5 799.4 803.3 806.0 808.7 805.9 805.4 799.4 DAY 30 5 23 19 1 20 9 6 10 27 30 1 MEAN QNH PRESSURE IN HPA 992.2 993.9 991.3 992.2 995.5 991.1 988.5 990.4 993.1 996.2 997.0 993.9 992.9 MAX. QNH PRESSURE IN HPA 999.6 1000.5 995.9 999.0 1003.8 994.8 994.0 995.2 996.6 1003.5 1003.3 1000.4 1003.8 DAY 13 18 27 24 13 12 15 18 27 22 4 5 MIN. QNH PRESSURE IN HPA 980.3 984.0 985.2 984.1 990.5 986.4 980.3 984.9 988.1 991.3 988.0 987.4 980.3 DAY 30 5 23 19 1 20 9 6 10 27 30 1 MEAN QFF PRESSURE IN HPA 994.2 995.9 987.2 984.8 986.2 978.6 973.9 975.4 981.7 988.7 997.3 995.7 986.6 MAX. QFF PRESSURE IN HPA 1001.7 1003.5 993.7 993.1 994.0 985.1 980.6 981.6 987.5 997.1 1008.2 1002.6 1008.2 DAY 19 1 7 24 13 3 13 18 27 31 22 19 MIN. QFF PRESSURE IN HPA 982.7 988.3 978.9 975.8 981.2 972.1 967.8 969.3 974.4 982.9 985.4 984.0 967.8 DAY 30 5 14 19 30 30 9 1 1 27 20 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 809.3 810.8 808.5 809.6 812.4 808.8 806.6 808.3 810.5 812.9 813.6 810.9 810.2 MAX. QFE PRESSURE IN HPA 815.6 815.5 812.8 815.5 819.5 812.2 811.0 812.1 813.9 818.6 818.5 816.2 819.5 DAY 12 18 27 1 13 12 15 18 24 22 4 5 MIN. QFE PRESSURE IN HPA 798.9 802.7 801.5 801.6 808.0 805.1 799.8 803.7 806.5 807.8 805.4 806.1 798.9 DAY 30 5 23 19 1 30 9 6 10 27 30 8 MEAN QNH PRESSURE IN HPA 992.0 993.8 991.1 992.4 995.7 991.4 988.9 990.8 993.4 996.3 997.1 993.8 993.0 MAX. QNH PRESSURE IN HPA 999.4 999.3 996.1 999.3 1004.0 995.4 994.0 995.3 997.4 1003.0 1002.9 1000.2 1004.0 DAY 12 18 27 1 13 12 15 18 24 22 4 5 MIN. QNH PRESSURE IN HPA 979.7 984.2 982.8 982.9 990.5 987.1 980.8 985.4 988.7 990.2 987.4 988.2 979.7 DAY 30 5 23 19 1 30 9 6 10 27 30 8 MEAN QFF PRESSURE IN HPA 993.2 994.5 986.1 984.3 985.8 978.4 973.5 975.3 981.0 987.5 996.0 994.7 985.9 MAX. QFF PRESSURE IN HPA 1000.6 1001.2 993.3 993.0 994.2 985.0 981.5 981.5 988.0 996.7 1007.6 1002.9 1007.6 DAY 19 1 7 23 13 13 13 4 24 31 22 19 MIN. QFF PRESSURE IN HPA 982.7 987.4 976.1 973.8 981.1 971.5 967.8 968.8 974.4 980.1 985.1 983.1 967.8 DAY 30 21 23 19 1 30 8 1 1 27 20 8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.1 -4.3 4.5 13.1 15.1 21.3 24.5 24.5 19.1 14.3 3.6 -0.9 11.3 MINIMUN AIR TEMPERATURE (C) -3.2 -8.1 -0.4 6.6 8.3 12.6 15.3 14.9 9.8 7.5 -1.3 -5.0 4.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 10 23 7 1 0 0 0 0 0 0 6 18 65 DAYS WITH FREEZING MIN.<= 0 30 27 16 2 0 0 0 0 0 0 19 30 124 TEMPERATURE RECORDS LOWEST(C) -10.0 -18.0 -14.0 -5.0 1.0 9.0 12.0 11.0 6.0 1.0 -13.0 -13.0 -18.0 DAY 3 11 9 1 11 1 3 28 25 31 27 3 MAXIMUM AIR TEMPERATURE (C) 7.8 1.7 10.6 20.1 22.6 30.1 33.6 34.5 30.5 21.9 10.6 4.9 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 17 31 31 19 0 0 0 99 DAYS WITH MAXIMUM TEMP. <= 0 3 9 1 0 0 0 0 0 0 0 2 3 18 TEMPERATURE RECORDS HIGHEST(C) 15.0 7.0 19.0 27.0 30.0 35.0 36.0 39.0 36.0 29.0 19.0 12.0 39.0 DAY 29 3 16 23 25 22 6 7 1 1 5 17 DIF. BETWEEN (MAX.-MIN.) (C) 11.0 9.8 11.0 13.5 14.3 17.5 18.3 19.6 20.7 14.4 11.9 9.9 14.3 MEAN DAILY TEMP. (MDT) (C) 2.3 -3.2 5.1 13.4 15.5 21.3 24.4 24.7 20.1 14.7 4.7 -0.0 11.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 44.5 106.0 115.5 19.0 0.0 0.0 0.0 285.0 HEATING DEG. DAYS(BASE 18 0C) 486.0 593.0 399.5 144.0 90.5 5.5 0.0 0.0 5.0 106.0 400.0 559.0 2788.5 DEWPOINT (MEAN C) -4.7 -7.4 -1.8 4.2 6.3 4.0 7.5 6.9 3.0 0.3 -1.7 -5.3 1.0 MIXING RATIO (G/KG) 3.42 2.87 4.30 6.63 7.56 6.54 8.39 8.10 6.24 5.14 4.33 3.31 5.57 VAPOUR PRESSURE (HPA) 4.43 3.70 5.56 8.57 9.73 8.43 10.74 10.37 8.04 6.67 5.63 4.32 7.18 SATURATION DEF. (HPA) 2.48 0.97 3.59 7.55 8.46 18.71 21.92 22.78 16.41 10.47 3.03 1.71 9.84 RELATIVE HUMIDITY (MEAN %) 69 81 67 59 60 36 37 36 38 44 72 75 56 RELATIVE HUMIDITY (MAX. %) 89 92 86 78 81 58 58 57 62 66 89 91 76 RELATIVE HUMIDITY (MIN. %) 43 61 48 41 38 18 22 19 21 25 55 55 37 RELATIVE HUMIDITY (MEAN% 03UTC) 79 86 78 76 77 54 56 56 55 62 84 83 71 RELATIVE HUMIDITY (MEAN% 09UTC) 59 77 59 50 44 26 26 28 28 32 62 63 46 RELATIVE HUMIDITY (MEAN% 15UTC) 61 78 62 48 50 23 25 23 24 35 69 74 48 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 26.2 52.5 71.3 108.7 29.9 0.0 0.0 0.0 0.0 19.0 41.2 12.4 361.2 DAYS WITH PRECIPITATION >=10 1 2 2 3 1 0 0 0 0 1 2 0 12 DAYS WITH PRECIPITATION >= 5 1 6 4 4 3 0 0 0 0 2 2 1 23 DAYS WITH PRECIPITATION >= 1 5 8 12 5 5 0 0 0 0 4 6 3 48 DAYS WITH PRECIPITATION 8 17 13 8 10 0 0 0 0 4 8 7 75 GREATEST DAILY PRECIPITATION 20.0 10.0 22.0 43.0 11.0 0.0 0.0 0.0 0.0 10.0 18.0 8.0 43.0 DAY 20 8 23 6 10 ** ** ** ** 23 25 1 DAY WITH THUNDER STORM 0 0 2 1 5 1 0 0 0 1 1 0 11 DAYS WITH SNOW OR SLEET 5 17 7 1 0 0 0 0 0 0 5 4 39 DAYS WITH DUST 1 0 1 0 0 3 3 0 0 2 1 0 11 WIND DIRECTION (PREVAILING) 270 270 270 270 180 270 180 180 180 270 180 180 270 PREVAILING WIND SPEED(KNOTS) 4.6 7.4 6.2 5.9 5.0 5.6 3.6 3.1 2.6 8.6 4.7 5.7 5.5 PREVAILING WIND PERCENT 27.4 25.0 28.2 20.1 20.6 24.2 19.8 28.3 19.2 19.9 13.8 11.7 18.8 CALMS PERCENT OF WIND 48.8 37.9 32.7 41.4 38.7 29.2 39.3 38.5 45.6 40.2 56.9 71.3 43.4 NO. OF WIND OBSERVATION 248 224 248 239 248 240 247 247 239 246 239 247 2912 VECTOR WIND DIRECTION (MEAN) 252 236 231 231 217 230 157 218 229 230 208 206 227 VECTOR WIND MAGNITUDE(KNOTS) 1.4 3.7 4.3 2.2 1.3 2.1 0.9 1.1 1.0 2.2 0.8 0.8 1.7 WIND STEADINESES (MEAN %) 60.9 77.1 79.6 62.9 43.3 65.6 39.1 57.9 58.8 61.1 47.1 72.7 58.6 WIND SPEED (MEAN KNOTS) 2.3 4.8 5.4 3.5 3.0 3.2 2.3 1.9 1.7 3.6 1.7 1.1 2.9 FASTEST WIND DIRECTION 230 200 230 230 270 200 130 180 250 270 180 200 230 FASTEST WIND SPEED (KNOTS) 25 40 40 45 18 25 15 13 13 34 25 24 45 DAY 31 5 16 4 1 4 9 7 12 12 13 22 DAYS WITH SKY CLEAR (0-2)/8 13 8 5 13 13 28 27 31 30 24 10 14 216 DAYS WITH P.CLOUDY (3-6)/8 12 13 19 10 11 2 4 0 0 4 13 9 97 DAYS WITH CLOUDY (7-8)/8 6 7 7 7 7 0 0 0 0 3 7 7 51 DAYS WITH VISIBILITY =< 2 KM 4 14 3 1 1 1 0 1 0 0 5 8 38 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 810.7 806.9 810.1 813.0 811.0 810.4 807.8 807.8 810.2 814.5 814.1 815.5 811.0 MAX. QFE PRESSURE IN HPA 815.8 815.8 816.1 819.8 815.3 816.1 811.5 812.8 815.4 822.6 819.9 819.9 822.6 DAY-HOUR 29- 6 2-18 20- 6 23- 0 5-18 13- 3 15- 6 29- 6 24- 6 20- 6 3- 6 16- 6 MIN. QFE PRESSURE IN HPA 802.8 794.9 802.3 802.1 804.3 802.7 803.9 801.9 805.3 806.9 806.9 809.4 794.9 DAY-HOUR 19-15 25- 9 1- 0 6-12 18-15 28-15 3-15 21- 9 11-12 12-15 25-12 12- 0 MEAN QNH PRESSURE IN HPA 993.7 989.1 992.9 996.4 994.0 993.4 990.3 990.2 993.1 998.1 997.7 999.3 994.0 MAX. QNH PRESSURE IN HPA 999.7 999.7 1000.0 1004.4 999.1 1000.0 994.6 996.1 999.2 1007.7 1004.5 1004.5 1007.7 DAY-HOUR 29- 6 2-18 20- 6 23- 0 5-18 13- 3 15- 6 29- 6 24- 6 20- 6 3- 6 16- 6 MIN. QNH PRESSURE IN HPA 984.3 975.0 983.8 983.5 986.1 984.2 985.6 983.3 987.3 989.2 989.2 992.1 975.0 DAY-HOUR 19-15 25- 9 1- 0 6-12 18-15 28-15 3-15 21- 9 11-12 12-15 25-12 12- 0 MEAN QFF PRESSURE IN HPA 994.8 994.1 991.5 989.0 984.9 980.5 975.1 975.1 981.6 990.0 997.0 1002.2 988.0 MAX. QFF PRESSURE IN HPA 1005.8 1007.5 1003.5 1002.4 992.1 988.4 980.4 984.3 992.0 1001.8 1007.9 1011.6 1011.6 DAY-HOUR 2-18 10-15 9- 9 7-18 5-18 12- 3 18-18 29- 6 30-18 20- 6 28- 6 15- 6 MIN. QFF PRESSURE IN HPA 981.8 975.0 979.9 979.0 977.2 969.4 969.9 968.0 973.4 978.3 988.9 991.9 968.0 DAY-HOUR 19-21 25- 9 22- 3 6- 9 18-15 28-12 22-12 21- 9 11-12 12-12 19-15 20-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 810.8 806.8 809.7 812.8 811.1 810.6 808.0 808.0 810.4 814.5 814.1 815.4 811.0 MAX. QFE PRESSURE IN HPA 815.2 815.0 815.0 819.8 814.9 815.8 810.2 812.0 815.0 821.5 819.0 819.1 821.5 DAY 29 3 15 23 23 13 16 29 27 21 10 17 MIN. QFE PRESSURE IN HPA 804.5 800.0 802.3 804.9 805.0 803.5 805.7 805.5 807.1 809.3 808.0 809.4 800.0 DAY 20 20 1 1 19 28 23 27 12 12 25 12 MEAN QNH PRESSURE IN HPA 993.8 989.1 992.5 996.2 994.1 993.5 990.4 990.5 993.3 998.2 997.7 999.3 994.0 MAX. QNH PRESSURE IN HPA 999.0 998.7 998.7 1004.4 998.6 999.7 993.1 995.2 998.7 1006.4 1003.5 1003.6 1006.4 DAY 29 3 15 23 23 13 16 29 27 21 10 17 MIN. QNH PRESSURE IN HPA 986.4 981.0 983.8 986.8 986.9 985.2 987.8 987.5 989.4 992.0 990.5 992.1 981.0 DAY 20 20 1 1 19 28 23 27 12 12 25 12 MEAN QFF PRESSURE IN HPA 993.9 993.4 990.5 988.4 984.7 980.3 974.8 974.8 981.0 988.9 996.0 1001.4 987.3 MAX. QFF PRESSURE IN HPA 1003.2 1002.6 1002.7 998.9 990.9 986.7 978.2 981.4 988.4 998.9 1003.6 1009.3 1009.3 DAY 3 11 9 8 11 13 18 29 24 21 28 15 MIN. QFF PRESSURE IN HPA 981.8 981.2 980.9 981.2 978.9 969.7 971.8 969.9 974.7 980.2 989.7 993.4 969.7 DAY 20 25 22 25 29 28 27 10 3 12 13 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 810.7 806.5 810.0 813.1 811.3 810.9 808.4 808.4 810.6 814.6 814.1 815.3 811.2 MAX. QFE PRESSURE IN HPA 815.0 814.6 815.5 817.5 814.1 816.1 811.1 812.3 814.5 821.2 818.5 818.7 821.2 DAY 29 3 15 8 1 13 15 29 27 26 10 16 MIN. QFE PRESSURE IN HPA 804.6 796.0 802.3 805.2 806.2 804.0 806.0 805.8 807.0 809.1 807.6 811.0 796.0 DAY 20 20 1 6 19 28 23 10 12 12 25 20 MEAN QNH PRESSURE IN HPA 993.6 988.7 992.8 996.5 994.3 993.9 991.0 990.9 993.6 998.3 997.7 999.1 994.2 MAX. QNH PRESSURE IN HPA 998.7 998.3 999.3 1001.7 997.7 1000.0 994.1 995.5 998.1 1006.0 1002.9 1003.1 1006.0 DAY 29 3 15 8 1 13 15 29 27 26 10 16 MIN. QNH PRESSURE IN HPA 986.5 976.3 983.8 987.2 988.4 985.8 988.1 987.9 989.3 991.8 990.0 994.0 976.3 DAY 20 20 1 6 19 28 23 10 12 12 25 20 MEAN QFF PRESSURE IN HPA 995.4 994.1 992.2 989.7 986.1 981.6 976.6 976.3 982.6 991.3 997.9 1002.9 988.9 MAX. QFF PRESSURE IN HPA 1004.9 1005.6 1003.2 1001.0 991.6 988.4 979.8 982.7 989.9 1000.3 1006.1 1011.3 1011.3 DAY 3 11 9 8 11 12 16 29 24 21 28 4 MIN. QFF PRESSURE IN HPA 984.7 978.8 979.9 982.6 980.8 971.6 973.0 971.4 976.6 981.4 990.9 994.4 971.4 DAY 20 20 22 25 19 28 22 10 6 12 13 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 811.6 807.3 810.7 813.8 811.7 811.2 808.8 808.8 811.2 815.2 815.0 816.3 811.8 MAX. QFE PRESSURE IN HPA 815.8 815.0 816.1 818.4 814.7 815.8 811.5 812.8 815.4 822.6 819.9 819.9 822.6 DAY 29 3 20 8 1 12 15 29 24 20 3 16 MIN. QFE PRESSURE IN HPA 806.0 797.4 803.4 804.6 805.1 804.8 806.3 806.0 807.8 808.8 807.8 811.6 797.4 DAY 20 20 1 6 19 28 23 10 11 12 25 20 MEAN QNH PRESSURE IN HPA 994.8 989.7 993.7 997.4 994.8 994.2 991.4 991.4 994.2 999.0 998.7 1000.2 995.0 MAX. QNH PRESSURE IN HPA 999.7 998.7 1000.0 1002.7 998.4 999.7 994.6 996.1 999.2 1007.7 1004.5 1004.5 1007.7 DAY 29 3 20 8 1 12 15 29 24 20 3 16 MIN. QNH PRESSURE IN HPA 988.1 978.0 985.1 986.5 987.1 986.7 988.5 988.1 990.2 991.4 990.2 994.7 978.0 DAY 20 20 1 6 19 28 23 10 11 12 25 20 MEAN QFF PRESSURE IN HPA 996.7 995.0 992.8 990.3 986.1 981.7 976.7 976.9 983.5 991.7 998.8 1003.7 989.5 MAX. QFF PRESSURE IN HPA 1005.3 1005.5 1003.4 1001.9 991.6 987.8 980.1 984.3 991.7 1001.8 1007.9 1011.6 1011.6 DAY 3 11 9 8 4 12 19 29 24 20 28 15 MIN. QFF PRESSURE IN HPA 987.6 978.1 983.3 981.4 980.2 972.8 973.1 971.7 975.7 981.9 991.8 994.5 971.7 DAY 31 25 22 6 29 28 26 10 5 12 13 20 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 811.1 807.2 810.4 813.6 811.2 810.7 808.2 807.9 810.5 814.7 814.5 816.2 811.3 MAX. QFE PRESSURE IN HPA 815.3 814.4 815.8 818.8 814.2 815.7 811.0 812.0 815.1 822.0 819.9 819.8 822.0 DAY 29 3 14 8 6 12 14 29 24 20 3 16 MIN. QFE PRESSURE IN HPA 805.3 794.9 803.2 803.5 804.3 804.2 805.7 801.9 806.7 807.8 807.3 812.1 794.9 DAY 19 25 1 6 19 28 23 21 11 12 25 20 MEAN QNH PRESSURE IN HPA 994.1 989.5 993.3 997.1 994.2 993.7 990.7 990.4 993.4 998.4 998.2 1000.1 994.4 MAX. QNH PRESSURE IN HPA 999.1 998.0 999.7 1003.2 997.8 999.6 994.0 995.2 998.9 1007.0 1004.5 1004.4 1007.0 DAY 29 3 14 8 6 12 14 29 24 20 3 16 MIN. QNH PRESSURE IN HPA 987.3 975.0 984.8 985.2 986.1 986.0 987.8 983.3 988.9 990.2 989.7 995.3 975.0 DAY 19 25 1 6 19 28 23 21 11 12 25 20 MEAN QFF PRESSURE IN HPA 994.8 994.2 991.4 989.2 984.5 980.4 974.9 974.6 981.5 989.4 996.7 1002.1 987.8 MAX. QFF PRESSURE IN HPA 1001.6 1004.9 1003.5 999.5 988.7 988.3 978.5 981.2 989.2 998.7 1005.4 1010.5 1010.5 DAY 2 10 9 8 3 12 18 29 24 20 22 15 MIN. QFF PRESSURE IN HPA 985.7 975.0 981.7 979.0 978.0 972.5 971.3 968.0 973.9 979.4 989.6 995.5 968.0 DAY 19 25 17 6 31 29 22 21 5 12 19 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 810.0 806.2 809.4 812.4 810.0 809.6 807.0 806.8 809.1 813.5 813.3 814.8 810.2 MAX. QFE PRESSURE IN HPA 813.6 813.5 814.6 818.0 813.0 814.7 809.9 810.0 813.5 821.0 817.0 818.9 821.0 DAY 28 2 14 8 4 12 15 29 26 20 9 16 MIN. QFE PRESSURE IN HPA 804.0 797.9 802.6 802.1 804.8 803.0 804.4 804.2 805.3 807.6 806.9 809.9 797.9 DAY 19 25 1 6 9 28 23 1 11 12 25 20 MEAN QNH PRESSURE IN HPA 992.9 988.4 992.1 995.6 992.8 992.4 989.4 989.0 991.8 997.0 996.8 998.5 993.0 MAX. QNH PRESSURE IN HPA 997.1 997.0 998.3 1002.3 996.4 998.4 992.7 992.8 997.0 1005.8 1001.1 1003.3 1005.8 DAY 28 2 14 8 4 12 15 29 26 20 9 16 MIN. QNH PRESSURE IN HPA 985.8 978.6 984.1 983.5 986.7 984.6 986.2 986.0 987.3 990.0 989.2 992.7 978.6 DAY 19 25 1 6 9 28 23 1 11 12 25 20 MEAN QFF PRESSURE IN HPA 992.9 992.6 989.9 987.6 983.2 978.9 973.5 973.1 979.2 987.8 995.1 1000.4 986.2 MAX. QFF PRESSURE IN HPA 1002.4 1002.9 999.7 998.5 988.2 986.9 977.8 978.4 986.0 998.0 1004.1 1007.7 1007.7 DAY 2 10 9 8 10 12 18 28 23 20 22 14 MIN. QFF PRESSURE IN HPA 983.3 982.4 981.2 980.2 977.3 969.4 969.9 968.3 973.4 978.3 989.0 991.9 968.3 DAY 19 25 17 4 31 28 22 10 11 12 19 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 810.3 806.8 809.6 812.2 810.1 809.4 806.6 806.7 809.2 813.9 813.5 815.1 810.3 MAX. QFE PRESSURE IN HPA 814.5 814.3 814.8 817.9 812.7 814.4 809.3 810.0 813.2 821.2 818.2 819.4 821.2 DAY 28 2 14 8 4 12 15 28 26 20 3 16 MIN. QFE PRESSURE IN HPA 802.8 800.0 803.6 804.0 804.3 802.7 803.9 804.3 805.9 806.9 807.7 810.2 800.0 DAY 19 19 1 6 18 28 3 2 11 12 25 20 MEAN QNH PRESSURE IN HPA 993.2 989.0 992.4 995.5 993.0 992.2 988.9 988.9 992.0 997.4 997.0 998.9 993.2 MAX. QNH PRESSURE IN HPA 998.1 997.9 998.5 1002.2 996.0 998.0 992.0 992.8 996.6 1006.0 1002.5 1003.9 1006.0 DAY 28 2 14 8 4 12 15 28 26 20 3 16 MIN. QNH PRESSURE IN HPA 984.3 981.0 985.3 985.8 986.1 984.2 985.6 986.1 988.0 989.2 990.1 993.1 981.0 DAY 19 19 1 6 18 28 3 2 11 12 25 20 MEAN QFF PRESSURE IN HPA 994.8 994.5 991.5 988.4 984.6 979.8 974.3 974.2 980.9 990.5 997.2 1002.6 987.8 MAX. QFF PRESSURE IN HPA 1004.8 1007.5 1000.9 999.3 989.8 987.3 977.5 980.3 987.7 1000.1 1006.1 1011.4 1011.4 DAY 2 10 9 8 11 12 8 28 23 20 27 3 MIN. QFF PRESSURE IN HPA 982.7 984.9 983.3 982.8 977.2 969.9 970.8 969.8 974.2 979.5 988.9 992.8 969.8 DAY 19 19 22 4 18 28 22 9 2 12 19 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 810.9 807.1 810.5 813.3 811.2 810.4 807.6 807.8 810.4 814.7 814.1 815.6 811.1 MAX. QFE PRESSURE IN HPA 815.3 815.8 815.5 819.1 815.3 815.5 810.9 811.3 814.8 821.4 818.8 818.8 821.4 DAY 28 2 14 7 5 12 15 28 26 20 3 16 MIN. QFE PRESSURE IN HPA 804.3 799.8 804.9 805.2 805.4 804.0 804.6 805.0 806.1 810.0 809.5 811.0 799.8 DAY 19 19 1 6 18 27 22 10 11 12 24 11 MEAN QNH PRESSURE IN HPA 993.9 989.4 993.4 996.7 994.2 993.4 990.1 990.3 993.3 998.4 997.7 999.4 994.2 MAX. QNH PRESSURE IN HPA 999.1 999.7 999.3 1003.6 999.1 999.3 993.9 994.4 998.5 1006.3 1003.2 1003.2 1006.3 DAY 28 2 14 7 5 12 15 28 26 20 3 16 MIN. QNH PRESSURE IN HPA 986.1 980.8 986.8 987.2 987.4 985.8 986.5 986.9 988.2 992.8 992.2 994.0 980.8 DAY 19 19 1 6 18 27 22 10 11 12 24 11 MEAN QFF PRESSURE IN HPA 995.7 994.9 992.3 989.5 985.5 980.9 975.4 975.8 982.9 991.1 997.9 1002.8 988.7 MAX. QFF PRESSURE IN HPA 1005.8 1006.5 1003.0 1002.4 992.1 986.8 980.4 982.4 992.0 999.6 1007.3 1011.2 1011.2 DAY 2 10 8 7 5 12 18 28 30 20 27 3 MIN. QFF PRESSURE IN HPA 984.5 983.9 985.4 983.4 978.9 971.3 970.4 970.7 975.4 983.0 990.0 993.3 970.4 DAY 19 19 18 4 31 27 22 10 4 12 19 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 810.8 807.1 810.3 813.2 811.3 810.8 808.0 808.1 810.5 814.8 814.3 815.6 811.2 MAX. QFE PRESSURE IN HPA 815.5 815.7 815.5 818.8 813.8 815.6 810.8 812.1 815.0 822.0 818.7 819.5 822.0 DAY 28 2 14 7 12 12 18 28 26 20 3 16 MIN. QFE PRESSURE IN HPA 804.0 799.6 806.3 805.3 806.2 804.9 805.0 805.4 806.6 810.0 809.0 810.2 799.6 DAY 19 19 1 5 19 28 21 10 11 6 24 11 MEAN QNH PRESSURE IN HPA 993.7 989.4 993.2 996.6 994.4 993.8 990.4 990.6 993.4 998.5 997.9 999.5 994.3 MAX. QNH PRESSURE IN HPA 999.3 999.6 999.3 1003.2 997.3 999.4 993.8 995.3 998.7 1007.0 1003.1 1004.0 1007.0 DAY 28 2 14 7 12 12 18 28 26 20 3 16 MIN. QNH PRESSURE IN HPA 985.8 980.6 988.5 987.3 988.4 986.8 986.9 987.4 988.8 992.8 991.7 993.1 980.6 DAY 19 19 1 5 19 28 21 10 11 6 24 11 MEAN QFF PRESSURE IN HPA 994.4 994.3 991.3 988.9 984.8 980.6 974.7 975.1 981.5 989.4 996.4 1001.5 987.7 MAX. QFF PRESSURE IN HPA 1002.8 1006.0 1003.5 1001.3 990.4 986.3 979.4 981.7 988.2 998.6 1004.9 1009.2 1009.2 DAY 2 10 8 7 2 12 18 28 24 20 21 14 MIN. QFF PRESSURE IN HPA 981.8 984.0 982.5 981.5 978.6 972.7 970.1 969.6 974.5 981.6 989.4 994.2 969.6 DAY 19 19 17 4 28 28 21 10 5 3 19 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.0 5.5 3.3 8.9 16.7 21.9 23.9 25.1 20.0 13.4 6.7 0.2 12.3 MINIMUN AIR TEMPERATURE (C) -2.2 0.5 -1.4 4.4 8.8 12.9 15.0 15.5 10.9 5.4 2.5 -4.5 5.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 14 7 7 0 0 0 0 0 0 0 0 14 42 DAYS WITH FREEZING MIN.<= 0 23 15 19 2 0 0 0 0 0 0 9 29 97 TEMPERATURE RECORDS LOWEST(C) -9.0 -6.0 -13.0 -1.0 2.0 8.0 12.0 11.0 7.0 1.0 -2.0 -13.0 -13.0 DAY 29 15 14 15 1 6 9 29 24 23 22 26 MAXIMUM AIR TEMPERATURE (C) 8.1 12.0 9.2 14.7 24.7 30.5 33.0 35.0 30.0 23.5 12.6 6.4 20.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 17 27 31 19 0 0 0 94 DAYS WITH MAXIMUM TEMP. <= 0 0 0 1 0 0 0 0 0 0 0 0 3 4 TEMPERATURE RECORDS HIGHEST(C) 14.0 18.0 17.0 22.0 29.0 38.0 38.0 38.0 32.0 29.0 22.0 14.0 38.0 DAY 20 28 31 26 25 26 16 11 4 1 1 15 DIF. BETWEEN (MAX.-MIN.) (C) 10.3 11.5 10.6 10.3 15.9 17.6 18.0 19.5 19.1 18.1 10.1 10.9 14.4 MEAN DAILY TEMP. (MDT) (C) 2.9 6.2 3.9 9.5 16.7 21.7 24.0 25.2 20.4 14.4 7.5 1.0 12.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 40.5 92.5 127.5 15.5 0.0 0.0 0.0 276.0 HEATING DEG. DAYS(BASE 18 0C) 467.0 341.0 437.5 253.5 54.5 1.0 0.0 0.0 4.0 112.5 313.5 527.5 2512.0 DEWPOINT (MEAN C) -4.2 -4.3 -2.5 1.6 4.5 6.2 9.5 4.0 2.6 -1.2 0.7 -4.3 1.0 MIXING RATIO (G/KG) 3.56 3.53 4.04 5.46 6.72 7.69 9.55 6.47 5.85 4.39 5.13 3.47 5.49 VAPOUR PRESSURE (HPA) 4.63 4.58 5.22 7.05 8.69 9.88 12.21 8.32 7.57 5.71 6.67 4.52 7.09 SATURATION DEF. (HPA) 2.81 4.99 2.97 4.87 11.46 18.29 19.30 25.91 17.73 10.90 3.58 2.04 10.40 RELATIVE HUMIDITY (MEAN %) 68 54 69 64 48 39 43 28 35 40 69 74 53 RELATIVE HUMIDITY (MAX. %) 86 77 88 83 72 59 64 46 55 62 84 88 72 RELATIVE HUMIDITY (MIN. %) 42 31 48 45 27 23 27 15 17 21 52 54 34 RELATIVE HUMIDITY (MEAN% 03UTC) 78 66 81 76 67 57 62 44 53 59 80 84 67 RELATIVE HUMIDITY (MEAN% 09UTC) 58 43 55 53 35 33 34 19 25 26 58 59 42 RELATIVE HUMIDITY (MEAN% 15UTC) 62 48 64 57 33 26 31 17 23 33 67 77 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 33.6 6.3 68.3 135.4 6.0 0.0 6.6 0.0 0.0 0.0 105.4 31.0 392.6 DAYS WITH PRECIPITATION >=10 1 0 2 6 0 0 0 0 0 0 4 2 15 DAYS WITH PRECIPITATION >= 5 2 0 6 6 1 0 0 0 0 0 7 2 24 DAYS WITH PRECIPITATION >= 1 6 2 12 10 2 0 2 0 0 0 12 2 48 DAYS WITH PRECIPITATION 6 8 16 13 4 0 4 0 0 2 13 2 68 GREATEST DAILY PRECIPITATION 18.0 4.0 20.0 40.0 5.0 0.0 3.0 0.0 0.0 0.0 21.0 18.0 40.0 DAY 7 5 2 27 7 ** 25 ** ** ** 10 20 DAY WITH THUNDER STORM 0 0 1 5 1 0 3 0 0 1 1 0 12 DAYS WITH SNOW OR SLEET 4 1 11 3 0 0 0 0 0 0 0 2 21 DAYS WITH DUST 3 5 2 2 3 5 2 3 2 4 1 0 32 WIND DIRECTION (PREVAILING) 180 270 270 270 270 270 270 180 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 12.3 14.7 10.4 7.6 5.7 3.6 3.7 3.9 2.4 3.8 4.5 2.7 5.8 PREVAILING WIND PERCENT 24.3 26.4 22.6 23.8 16.2 32.8 23.9 25.3 21.3 20.2 25.2 21.9 20.6 CALMS PERCENT OF WIND 43.3 35.9 37.9 40.0 50.2 26.5 32.0 32.2 36.4 39.5 19.7 36.0 35.9 NO. OF WIND OBSERVATION 247 231 248 240 247 238 247 245 239 248 238 228 2896 VECTOR WIND DIRECTION (MEAN) 201 233 229 233 245 231 213 215 223 161 198 167 219 VECTOR WIND MAGNITUDE(KNOTS) 4.8 5.6 4.1 2.8 1.0 1.5 0.9 1.1 0.7 0.8 1.5 0.9 2.0 WIND STEADINESES (MEAN %) 80.0 73.7 75.9 70.0 45.5 55.6 37.5 36.7 31.8 38.1 55.6 56.3 57.1 WIND SPEED (MEAN KNOTS) 6.0 7.6 5.4 4.0 2.2 2.7 2.4 3.0 2.2 2.1 2.7 1.6 3.5 FASTEST WIND DIRECTION 180 270 230 270 250 180 180 180 100 230 200 230 180 FASTEST WIND SPEED (KNOTS) 40 38 40 35 24 18 13 18 30 16 28 20 40 DAY 23 3 1 5 18 21 19 11 10 7 19 2 DAYS WITH SKY CLEAR (0-2)/8 18 13 8 6 25 30 25 30 27 28 10 19 239 DAYS WITH P.CLOUDY (3-6)/8 12 12 16 14 4 0 4 1 3 3 8 9 86 DAYS WITH CLOUDY (7-8)/8 1 4 7 10 2 0 2 0 0 0 12 3 41 DAYS WITH VISIBILITY =< 2 KM 2 2 2 2 1 1 0 0 0 1 3 7 21 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 812.8 812.3 808.5 810.4 814.2 810.1 808.3 808.5 813.2 816.1 815.0 815.3 812.1 MAX. QFE PRESSURE IN HPA 819.8 819.2 820.5 819.3 819.9 815.3 814.0 813.6 818.5 821.2 819.9 820.9 821.2 DAY-HOUR 19- 6 5-21 24-15 7- 9 16-12 2- 9 29- 6 31- 6 3- 9 28- 6 4- 6 6- 6 MIN. QFE PRESSURE IN HPA 801.1 802.8 798.2 803.8 808.8 803.2 801.7 804.6 805.7 810.4 804.8 808.3 798.2 DAY-HOUR 6-12 29-12 12- 0 23-18 31-12 30-12 23- 9 11-15 12- 3 7-12 19-12 29-12 MEAN QNH PRESSURE IN HPA 996.1 995.6 991.1 993.3 997.8 992.9 990.8 991.1 996.6 1000.1 998.7 999.1 995.3 MAX. QNH PRESSURE IN HPA 1004.4 1003.7 1005.2 1003.8 1004.5 999.1 997.6 997.1 1002.9 1006.0 1004.5 1005.7 1006.0 DAY-HOUR 19- 6 5-21 24-15 7- 9 16-12 2- 9 29- 6 31- 6 3- 9 28- 6 4- 6 6- 6 MIN. QNH PRESSURE IN HPA 982.3 984.3 978.9 985.5 991.4 984.8 983.0 986.5 987.8 993.3 986.7 990.8 978.9 DAY-HOUR 6-12 29-12 12- 0 23-18 31-12 30-12 23- 9 11-15 12- 3 7-12 19-12 29-12 MEAN QFF PRESSURE IN HPA 996.6 993.6 990.4 988.6 988.0 979.5 975.9 975.8 984.7 992.7 995.8 1001.1 988.6 MAX. QFF PRESSURE IN HPA 1006.3 1005.0 1006.0 999.3 996.3 987.9 983.2 984.3 992.5 1001.1 1003.1 1010.5 1010.5 DAY-HOUR 12- 6 15- 6 24-15 7- 6 1- 6 2- 6 29- 3 31- 6 30- 0 23- 6 26- 6 26-15 MIN. QFF PRESSURE IN HPA 982.5 977.2 975.1 978.7 979.1 968.1 967.0 970.1 975.8 981.5 982.1 991.5 967.0 DAY-HOUR 6-12 29-12 12- 0 5- 9 31-12 30-12 8-12 12-12 3-21 7-12 18-21 19-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 812.8 812.2 808.1 810.2 814.0 810.3 808.6 809.0 813.5 816.2 815.0 815.6 812.1 MAX. QFE PRESSURE IN HPA 819.3 817.0 815.6 817.1 818.9 814.2 813.1 812.4 818.2 820.2 819.8 819.7 820.2 DAY 19 15 20 7 31 3 29 31 30 31 5 6 MIN. QFE PRESSURE IN HPA 805.3 806.2 798.2 805.5 810.2 805.3 805.0 806.1 807.8 812.2 806.2 811.1 798.2 DAY 7 22 12 19 17 21 2 27 4 8 20 20 MEAN QNH PRESSURE IN HPA 996.1 995.4 990.6 993.0 997.5 993.2 991.2 991.6 996.9 1000.1 998.8 999.5 995.3 MAX. QNH PRESSURE IN HPA 1003.8 1001.1 999.4 1001.2 1003.3 997.8 996.5 995.7 1002.5 1004.9 1004.4 1004.3 1004.9 DAY 19 15 20 7 31 3 29 31 30 31 5 6 MIN. QNH PRESSURE IN HPA 987.3 988.4 978.9 987.5 993.1 987.3 986.9 988.2 990.2 995.4 988.4 994.1 978.9 DAY 7 22 12 19 17 21 2 27 4 8 20 20 MEAN QFF PRESSURE IN HPA 995.6 992.7 989.2 988.0 987.5 979.6 976.0 975.6 984.1 991.6 995.1 1000.0 987.9 MAX. QFF PRESSURE IN HPA 1002.4 1001.9 1001.5 995.5 995.3 986.0 981.2 981.8 992.5 998.3 1000.7 1005.9 1005.9 DAY 12 15 20 7 2 2 26 31 30 23 12 6 MIN. QFF PRESSURE IN HPA 986.2 981.1 975.1 980.9 981.2 971.2 969.9 971.9 977.0 984.9 985.8 994.5 969.9 DAY 22 22 12 19 30 30 8 12 4 7 20 2 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 812.7 812.3 808.3 810.2 813.9 810.7 808.9 809.0 813.3 816.5 815.1 814.9 812.2 MAX. QFE PRESSURE IN HPA 819.1 817.2 815.7 818.2 816.9 815.0 813.6 812.6 816.0 820.3 818.9 819.6 820.3 DAY 19 15 20 7 8 3 29 31 11 28 26 6 MIN. QFE PRESSURE IN HPA 803.3 805.5 798.8 805.2 810.1 805.8 804.3 806.1 805.7 812.6 806.0 809.7 798.8 DAY 7 22 12 11 18 30 8 27 12 7 20 30 MEAN QNH PRESSURE IN HPA 996.0 995.6 990.9 993.1 997.4 993.7 991.6 991.7 996.7 1000.5 998.9 998.7 995.4 MAX. QNH PRESSURE IN HPA 1003.6 1001.3 999.6 1002.5 1001.0 998.7 997.1 995.9 999.9 1005.0 1003.3 1004.2 1005.0 DAY 19 15 20 7 8 3 29 31 11 28 26 6 MIN. QNH PRESSURE IN HPA 984.9 987.5 979.6 987.2 993.0 987.9 986.1 988.2 987.8 995.9 988.1 992.5 979.6 DAY 7 22 12 11 18 30 8 27 12 7 20 30 MEAN QFF PRESSURE IN HPA 997.3 994.2 990.9 989.1 988.4 980.9 977.4 977.2 985.7 994.4 996.7 1001.8 989.5 MAX. QFF PRESSURE IN HPA 1004.0 1002.8 1003.2 997.9 995.9 986.9 983.2 983.1 990.2 1000.6 1002.1 1008.7 1008.7 DAY 19 15 20 7 2 3 29 31 26 23 26 26 MIN. QFF PRESSURE IN HPA 985.5 980.4 977.4 981.9 982.5 972.3 969.4 973.7 975.8 985.3 986.0 993.4 969.4 DAY 7 22 12 19 30 30 8 12 12 7 20 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 813.6 813.1 809.1 811.2 814.5 811.1 809.2 809.6 814.3 817.2 816.0 816.2 812.9 MAX. QFE PRESSURE IN HPA 819.8 818.0 815.5 818.8 818.3 815.2 814.0 813.6 816.5 821.2 819.9 820.9 821.2 DAY 19 15 20 7 2 2 29 31 26 28 4 6 MIN. QFE PRESSURE IN HPA 804.0 806.1 800.2 806.4 810.2 805.9 804.4 806.5 810.2 812.8 808.4 810.7 800.2 DAY 7 29 12 11 18 30 8 27 4 7 19 30 MEAN QNH PRESSURE IN HPA 997.1 996.5 991.8 994.3 998.2 994.1 991.9 992.3 997.9 1001.3 999.9 1000.1 996.3 MAX. QNH PRESSURE IN HPA 1004.4 1002.3 999.3 1003.2 1002.6 999.0 997.6 997.1 1000.5 1006.0 1004.5 1005.7 1006.0 DAY 19 15 20 7 2 2 29 31 26 28 4 6 MIN. QNH PRESSURE IN HPA 985.8 988.2 981.3 988.6 993.1 988.0 986.2 988.7 993.1 996.1 990.9 993.7 981.3 DAY 7 29 12 11 18 30 8 27 4 7 19 30 MEAN QFF PRESSURE IN HPA 998.7 995.3 991.7 989.7 988.6 980.8 977.4 977.8 986.7 994.9 997.5 1003.1 990.2 MAX. QFF PRESSURE IN HPA 1006.3 1005.0 1002.6 999.3 996.3 987.9 982.9 984.3 990.9 1001.1 1003.1 1009.5 1009.5 DAY 12 15 20 7 1 2 30 31 26 23 26 6 MIN. QFF PRESSURE IN HPA 986.8 981.4 979.5 984.0 981.8 972.3 969.5 973.2 981.2 986.1 986.6 993.7 969.5 DAY 23 29 12 19 30 30 8 12 4 7 19 19 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 813.2 812.9 808.9 810.6 814.2 810.4 808.3 808.7 813.9 816.5 815.4 815.5 812.4 MAX. QFE PRESSURE IN HPA 818.9 818.4 815.5 819.3 817.8 815.3 813.2 813.2 818.5 820.4 819.7 820.6 820.6 DAY 19 15 20 7 7 2 29 31 3 30 4 6 MIN. QFE PRESSURE IN HPA 803.7 805.5 800.8 804.1 809.4 805.3 801.7 806.1 809.5 811.2 806.4 809.6 800.8 DAY 7 29 12 5 31 29 23 27 4 7 19 29 MEAN QNH PRESSURE IN HPA 996.6 996.2 991.5 993.6 997.8 993.4 990.8 991.3 997.4 1000.5 999.2 999.3 995.6 MAX. QNH PRESSURE IN HPA 1003.3 1002.7 999.3 1003.8 1002.0 999.1 996.6 996.6 1002.9 1005.1 1004.3 1005.3 1005.3 DAY 19 15 20 7 7 2 29 31 3 30 4 6 MIN. QNH PRESSURE IN HPA 985.4 987.5 982.0 985.9 992.1 987.3 983.0 988.2 992.2 994.3 988.6 992.4 982.0 DAY 7 29 12 5 31 29 23 27 4 7 19 29 MEAN QFF PRESSURE IN HPA 996.4 993.6 990.6 988.3 987.4 979.4 975.3 975.2 984.6 991.9 995.6 1000.7 988.2 MAX. QFF PRESSURE IN HPA 1003.3 1002.8 1000.8 998.8 995.3 987.2 980.6 982.5 989.6 997.5 1000.9 1006.9 1006.9 DAY 12 15 20 7 1 2 24 31 3 23 26 6 MIN. QFF PRESSURE IN HPA 983.9 979.8 979.6 978.7 979.6 969.0 967.5 970.2 978.3 982.1 982.8 993.0 967.5 DAY 23 29 11 5 31 30 23 12 4 7 19 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 811.8 811.4 807.8 809.9 814.2 809.1 807.2 807.4 812.2 815.2 814.2 814.5 811.2 MAX. QFE PRESSURE IN HPA 817.8 816.4 813.5 817.3 819.9 813.9 812.2 811.9 815.2 819.0 818.3 819.5 819.9 DAY 19 15 20 7 16 2 29 31 26 30 26 6 MIN. QFE PRESSURE IN HPA 801.1 802.8 800.0 805.0 808.8 803.2 802.4 805.0 808.3 810.4 804.8 808.3 800.0 DAY 6 29 11 1 31 30 2 2 3 7 19 29 MEAN QNH PRESSURE IN HPA 994.9 994.5 990.3 992.7 997.8 991.8 989.5 989.7 995.4 998.9 997.8 998.1 994.3 MAX. QNH PRESSURE IN HPA 1002.0 1000.4 997.0 1001.4 1004.5 997.4 995.4 995.1 999.0 1003.5 1002.6 1004.0 1004.5 DAY 19 15 20 7 16 2 29 31 26 30 26 6 MIN. QNH PRESSURE IN HPA 982.3 984.3 981.0 986.9 991.4 984.8 983.9 986.9 990.8 993.3 986.7 990.8 981.0 DAY 6 29 11 1 31 30 2 2 3 7 19 29 MEAN QFF PRESSURE IN HPA 994.3 991.6 988.8 987.6 987.7 977.9 974.0 973.7 982.7 990.4 994.0 999.0 986.8 MAX. QFF PRESSURE IN HPA 1001.7 1000.2 998.2 994.7 995.6 986.0 980.1 981.5 987.8 995.6 1000.2 1005.9 1005.9 DAY 11 14 15 7 20 2 26 31 25 31 26 6 MIN. QFF PRESSURE IN HPA 982.5 977.2 976.8 980.2 979.1 968.1 967.0 970.1 977.0 981.5 983.4 991.5 967.0 DAY 6 29 11 18 31 30 8 12 4 7 19 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 812.5 811.8 808.5 809.9 813.9 808.8 807.0 807.2 812.2 815.4 814.4 814.6 811.3 MAX. QFE PRESSURE IN HPA 818.0 817.5 820.5 817.3 819.6 813.6 811.5 811.6 815.0 819.3 818.7 819.2 820.5 DAY 18 15 24 7 17 2 29 31 24 30 26 6 MIN. QFE PRESSURE IN HPA 804.1 802.9 799.0 805.2 808.8 803.6 802.6 804.6 807.6 810.6 804.8 808.7 799.0 DAY 7 29 11 18 31 29 2 11 3 7 19 19 MEAN QNH PRESSURE IN HPA 995.8 994.9 991.1 992.8 997.4 991.4 989.3 989.6 995.4 999.2 998.0 998.3 994.4 MAX. QNH PRESSURE IN HPA 1002.3 1001.7 1005.2 1001.4 1004.2 997.1 994.6 994.7 998.7 1003.8 1003.1 1003.7 1005.2 DAY 18 15 24 7 17 2 29 31 24 30 26 6 MIN. QNH PRESSURE IN HPA 985.9 984.5 979.9 987.2 991.4 985.3 984.1 986.5 990.0 993.5 986.7 991.3 979.9 DAY 7 29 11 18 31 29 2 11 3 7 19 19 MEAN QFF PRESSURE IN HPA 996.9 993.4 991.0 988.6 988.2 978.3 975.0 975.1 984.5 993.1 995.8 1001.5 988.5 MAX. QFF PRESSURE IN HPA 1003.8 1002.1 1006.0 996.5 995.9 985.8 980.5 981.7 989.5 999.3 1002.5 1010.5 1010.5 DAY 11 7 24 7 16 2 28 31 25 28 26 26 MIN. QFF PRESSURE IN HPA 986.2 979.0 976.7 980.1 981.7 970.0 969.0 970.7 977.8 982.9 984.4 991.9 969.0 DAY 23 29 11 18 31 30 2 10 4 7 19 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 813.0 812.4 808.7 810.3 814.5 809.9 808.2 808.4 813.2 816.2 815.0 815.6 812.1 MAX. QFE PRESSURE IN HPA 818.5 817.7 814.8 818.0 819.1 814.3 812.4 812.3 815.3 820.2 818.8 819.7 820.2 DAY 18 15 19 7 30 2 28 31 25 30 3 5 MIN. QFE PRESSURE IN HPA 806.1 802.9 799.1 803.8 810.1 804.3 804.0 805.3 809.3 811.4 805.5 809.8 799.1 DAY 7 29 11 23 17 29 2 11 4 7 19 19 MEAN QNH PRESSURE IN HPA 996.4 995.6 991.2 993.2 998.1 992.7 990.7 991.0 996.7 1000.1 998.8 999.5 995.3 MAX. QNH PRESSURE IN HPA 1002.9 1001.9 998.5 1002.3 1003.6 997.9 995.7 995.5 999.1 1004.9 1003.2 1004.3 1004.9 DAY 18 15 19 7 30 2 28 31 25 30 3 5 MIN. QNH PRESSURE IN HPA 988.2 984.5 980.0 985.5 993.0 986.1 985.8 987.3 992.0 994.5 987.5 992.6 980.0 DAY 7 29 11 23 17 29 2 11 4 7 19 19 MEAN QFF PRESSURE IN HPA 997.9 994.3 991.1 988.7 988.4 979.5 976.2 976.5 985.5 993.7 996.4 1001.9 989.2 MAX. QFF PRESSURE IN HPA 1005.7 1003.9 1000.1 997.6 994.6 986.7 982.1 982.9 990.3 999.7 1002.1 1007.7 1007.7 DAY 11 15 19 7 1 2 23 30 25 30 26 5 MIN. QFF PRESSURE IN HPA 987.4 977.5 977.1 978.8 982.1 971.0 970.1 971.2 978.8 984.5 984.3 993.2 970.1 DAY 22 29 11 23 31 29 7 11 4 7 18 19 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 812.8 812.8 808.7 810.8 814.6 810.4 808.7 808.9 813.5 816.3 815.1 815.8 812.4 MAX. QFE PRESSURE IN HPA 818.0 819.2 815.6 818.3 819.4 814.5 813.3 812.1 817.1 820.2 818.8 819.8 820.2 DAY 18 5 19 7 30 2 28 30 27 30 3 5 MIN. QFE PRESSURE IN HPA 807.0 807.2 798.6 805.3 810.3 805.0 804.7 806.5 807.2 812.0 806.0 810.6 798.6 DAY 7 9 11 10 17 29 2 1 3 6 18 19 MEAN QNH PRESSURE IN HPA 996.1 996.1 991.3 993.7 998.3 993.3 991.3 991.6 997.0 1000.2 998.8 999.7 995.6 MAX. QNH PRESSURE IN HPA 1002.3 1003.7 999.4 1002.6 1003.9 998.1 996.7 995.3 1001.2 1004.9 1003.2 1004.4 1004.9 DAY 18 5 19 7 30 2 28 30 27 30 3 5 MIN. QNH PRESSURE IN HPA 989.3 989.5 979.4 987.3 993.2 986.9 986.6 988.7 989.5 995.2 988.1 993.5 979.4 DAY 7 9 11 10 17 29 2 1 3 6 18 19 MEAN QFF PRESSURE IN HPA 996.1 993.7 990.1 988.5 987.8 979.8 975.9 975.5 984.1 991.7 995.2 1000.5 988.2 MAX. QFF PRESSURE IN HPA 1003.4 1004.5 1000.4 996.6 995.0 986.2 981.8 981.3 989.9 997.5 1000.7 1007.2 1007.2 DAY 11 5 19 7 1 2 24 30 27 22 11 5 MIN. QFF PRESSURE IN HPA 986.4 983.5 975.8 980.9 982.3 969.3 970.9 971.6 975.8 982.8 982.1 994.4 969.3 DAY 23 28 11 18 22 29 19 11 3 6 18 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.8 0.0 3.8 8.6 17.1 21.2 25.8 23.9 19.2 12.5 5.9 2.2 11.4 MINIMUN AIR TEMPERATURE (C) -7.0 -4.7 -1.3 3.4 9.0 12.2 16.1 14.5 9.7 4.3 0.3 -2.2 4.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 24 14 8 1 0 0 0 0 0 0 6 12 65 DAYS WITH FREEZING MIN.<= 0 30 28 22 6 0 0 0 0 0 7 16 24 133 TEMPERATURE RECORDS LOWEST(C) -17.0 -12.0 -7.0 -5.0 4.0 8.0 14.0 11.0 7.0 -2.0 -8.0 -10.0 -17.0 DAY 10 1 4 17 1 7 3 9 24 28 26 17 MAXIMUM AIR TEMPERATURE (C) 1.6 4.7 10.4 14.7 25.4 29.9 34.9 33.8 30.6 23.3 14.4 9.2 19.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 18 31 31 23 0 0 0 103 DAYS WITH MAXIMUM TEMP. <= 0 9 2 0 0 0 0 0 0 0 0 0 0 11 TEMPERATURE RECORDS HIGHEST(C) 10.0 11.0 19.0 25.0 29.0 34.0 38.0 37.0 34.0 29.0 21.0 15.0 38.0 DAY 20 8 25 27 24 21 30 6 14 1 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 9.4 11.7 11.3 16.4 17.7 18.8 19.3 20.9 19.0 14.1 11.4 14.9 MEAN DAILY TEMP. (MDT) (C) -2.7 0.0 4.5 9.1 17.2 21.0 25.5 24.2 20.1 13.8 7.3 3.5 12.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 32.5 140.0 98.0 8.0 0.0 0.0 0.0 278.5 HEATING DEG. DAYS(BASE 18 0C) 641.5 504.0 418.0 258.0 36.5 5.5 0.0 0.0 2.0 130.5 320.0 449.5 2765.5 DEWPOINT (MEAN C) -5.4 -4.2 -4.9 2.1 4.6 7.0 8.1 7.9 3.9 -1.9 -2.1 -3.7 1.0 MIXING RATIO (G/KG) 3.31 3.52 3.40 5.62 6.66 7.92 8.60 8.47 6.50 4.16 4.26 3.67 5.51 VAPOUR PRESSURE (HPA) 4.30 4.56 4.40 7.26 8.59 10.19 11.01 10.88 8.38 5.42 5.53 4.76 7.11 SATURATION DEF. (HPA) 0.97 1.74 4.06 4.63 11.93 16.65 24.03 20.64 15.74 10.49 4.40 2.70 9.83 RELATIVE HUMIDITY (MEAN %) 83 75 57 67 47 43 35 39 40 41 59 68 55 RELATIVE HUMIDITY (MAX. %) 92 88 81 87 70 64 57 61 65 64 78 85 74 RELATIVE HUMIDITY (MIN. %) 73 57 35 49 29 25 21 24 22 21 37 45 37 RELATIVE HUMIDITY (MEAN% 03UTC) 88 82 69 82 67 63 56 59 59 60 75 77 70 RELATIVE HUMIDITY (MEAN% 09UTC) 77 65 44 54 34 30 26 28 31 29 44 50 43 RELATIVE HUMIDITY (MEAN% 15UTC) 84 75 47 58 33 30 27 27 24 29 58 69 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 56.1 29.6 28.9 196.0 2.0 0.4 1.5 0.0 0.0 0.0 1.6 66.5 382.6 DAYS WITH PRECIPITATION >=10 1 0 0 7 0 0 0 0 0 0 0 2 10 DAYS WITH PRECIPITATION >= 5 4 3 3 8 0 0 0 0 0 0 0 3 21 DAYS WITH PRECIPITATION >= 1 10 7 6 13 2 0 1 0 0 0 0 6 45 DAYS WITH PRECIPITATION 16 12 8 17 3 1 2 0 0 0 5 11 75 GREATEST DAILY PRECIPITATION 19.0 8.0 8.0 39.0 1.0 0.4 1.3 0.0 0.0 0.0 0.9 36.0 39.0 DAY 21 2 12 8 13 18 17 ** ** ** 11 14 DAY WITH THUNDER STORM 0 0 0 1 1 0 1 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 10 12 5 2 0 0 0 0 0 0 0 5 34 DAYS WITH DUST 0 0 1 2 19 22 13 3 0 3 6 0 69 WIND DIRECTION (PREVAILING) 270 270 180 180 180 270 180 180 180 270 270 180 180 PREVAILING WIND SPEED(KNOTS) 3.1 4.5 8.5 6.3 4.5 5.5 3.5 3.5 3.0 7.2 5.6 3.8 4.5 PREVAILING WIND PERCENT 14.2 23.3 21.4 19.1 22.3 24.2 33.1 30.1 17.9 15.3 18.4 19.4 19.0 CALMS PERCENT OF WIND 48.4 46.6 31.0 43.0 23.5 31.7 22.6 17.1 31.3 36.7 24.3 36.4 31.9 NO. OF WIND OBSERVATION 155 193 248 235 247 240 248 246 240 248 239 247 2786 VECTOR WIND DIRECTION (MEAN) 219 247 227 211 234 239 181 141 207 237 228 214 219 VECTOR WIND MAGNITUDE(KNOTS) 1.2 1.6 3.8 1.6 2.1 1.0 1.2 1.6 0.8 1.0 2.7 1.8 1.5 WIND STEADINESES (MEAN %) 50.0 64.0 71.7 51.6 46.7 29.4 41.4 43.2 34.8 37.0 65.9 62.1 45.5 WIND SPEED (MEAN KNOTS) 2.4 2.5 5.3 3.1 4.5 3.4 2.9 3.7 2.3 2.7 4.1 2.9 3.3 FASTEST WIND DIRECTION 200 230 270 180 260 270 90 120 230 270 230 270 200 FASTEST WIND SPEED (KNOTS) 30 18 30 28 20 20 15 15 10 20 30 30 30 DAY 22 25 17 13 7 6 24 28 1 17 22 22 DAYS WITH SKY CLEAR (0-2)/8 12 14 15 7 21 29 30 29 29 28 17 12 243 DAYS WITH P.CLOUDY (3-6)/8 6 7 10 8 8 1 1 2 1 3 6 12 65 DAYS WITH CLOUDY (7-8)/8 11 7 6 15 2 0 0 0 0 0 7 7 55 DAYS WITH VISIBILITY =< 2 KM 11 4 2 4 1 0 1 0 0 0 2 4 29 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 812.3 810.8 809.4 811.1 811.9 811.1 807.5 810.1 810.3 815.5 814.1 812.2 811.4 MAX. QFE PRESSURE IN HPA 818.1 818.5 819.1 817.8 818.3 817.6 814.0 814.2 815.3 820.6 820.7 820.5 820.7 DAY-HOUR 10- 6 22- 6 3-18 26- 6 14-18 11- 6 24-21 9- 6 25- 6 25- 6 2- 6 3- 6 MIN. QFE PRESSURE IN HPA 805.6 801.6 799.1 804.3 804.1 805.8 802.5 804.3 805.9 809.9 803.5 800.7 799.1 DAY-HOUR 22- 9 2-12 12-21 13- 9 30-12 30-15 10-15 6-15 11-15 3-12 22-12 22-12 MEAN QNH PRESSURE IN HPA 995.6 993.8 992.2 994.1 995.1 994.1 989.9 993.0 993.2 999.3 997.6 995.4 994.4 MAX. QNH PRESSURE IN HPA 1002.4 1002.9 1003.6 1002.0 1002.6 1001.8 997.6 997.8 999.1 1005.3 1005.5 1005.2 1005.5 DAY-HOUR 10- 6 22- 6 3-18 26- 6 14-18 11- 6 24-21 9- 6 25- 6 25- 6 2- 6 3- 6 MIN. QNH PRESSURE IN HPA 987.6 982.9 980.0 986.1 985.9 987.9 984.0 986.1 988.0 992.7 985.2 981.9 980.0 DAY-HOUR 22- 9 2-12 12-21 13- 9 30-12 30-15 10-15 6-15 11-15 3-12 22-12 22-12 MEAN QFF PRESSURE IN HPA ****** 995.7 991.2 989.8 984.9 981.2 974.0 978.3 981.6 992.5 995.3 995.7 ****** MAX. QFF PRESSURE IN HPA ****** 1007.9 1007.9 999.8 995.8 988.6 980.6 986.6 989.3 1003.3 1006.9 1007.1 ****** DAY-HOUR **-** 22- 6 4- 6 17- 3 1- 6 11- 6 25- 6 9- 6 29- 6 25- 6 29- 6 16-18 MIN. QFF PRESSURE IN HPA ****** 987.9 980.0 978.8 976.6 972.4 966.7 969.8 974.4 982.6 978.7 981.1 ****** DAY-HOUR **-** 17- 0 25-21 13- 9 27-21 30-21 10-12 6-12 1-12 3-12 22-12 22-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** 810.6 809.2 810.9 811.9 810.9 807.6 810.1 810.6 815.5 814.2 812.2 ****** MAX. QFE PRESSURE IN HPA ****** 817.3 818.3 816.7 817.2 816.4 813.0 813.2 814.3 819.9 819.3 818.9 ****** DAY ** 22 4 26 15 11 25 9 25 25 2 4 MIN. QFE PRESSURE IN HPA ****** 805.3 799.2 805.2 805.0 807.2 804.0 805.0 808.2 811.4 805.5 802.6 ****** DAY ** 17 13 2 30 6 11 7 17 4 23 22 MEAN QNH PRESSURE IN HPA ****** 993.6 991.9 993.9 995.1 993.9 990.0 992.9 993.5 999.3 997.7 995.4 ****** MAX. QNH PRESSURE IN HPA ****** 1001.4 1002.6 1000.7 1001.3 1000.4 996.4 996.6 997.9 1004.5 1003.8 1003.3 ****** DAY ** 22 4 26 15 11 25 9 25 25 2 4 MIN. QNH PRESSURE IN HPA ****** 987.3 980.1 987.2 986.9 989.5 985.8 986.9 990.7 994.5 987.5 984.1 ****** DAY ** 17 13 2 30 6 11 7 17 4 23 22 MEAN QFF PRESSURE IN HPA ****** 994.6 990.3 989.0 984.7 980.6 973.4 977.4 980.9 991.4 994.5 994.9 ****** MAX. QFF PRESSURE IN HPA ****** 1006.3 1005.6 998.3 993.3 987.4 978.9 982.6 986.3 999.6 1002.5 1004.8 ****** DAY ** 22 4 17 2 11 25 9 25 25 29 17 MIN. QFF PRESSURE IN HPA ****** 987.9 980.2 981.9 977.2 974.8 968.0 970.3 975.3 983.9 982.1 982.3 ****** DAY ** 17 26 15 28 30 11 7 1 4 23 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 812.0 810.6 809.7 811.2 812.1 811.5 808.1 810.6 810.7 815.7 814.2 812.3 811.6 MAX. QFE PRESSURE IN HPA 817.5 817.6 818.6 817.2 817.7 816.4 812.8 813.8 814.5 820.1 819.8 819.1 820.1 DAY 10 22 4 26 15 11 25 9 25 25 2 3 MIN. QFE PRESSURE IN HPA 805.9 805.7 799.6 805.1 804.2 807.2 804.1 805.3 808.0 811.7 804.1 802.5 799.6 DAY 22 17 13 8 30 6 11 7 21 3 22 22 MEAN QNH PRESSURE IN HPA 995.2 993.6 992.5 994.2 995.4 994.6 990.6 993.6 993.6 999.5 997.8 995.5 994.7 MAX. QNH PRESSURE IN HPA 1001.7 1001.8 1003.0 1001.3 1001.9 1000.4 996.1 997.3 998.1 1004.7 1004.4 1003.6 1004.7 DAY 10 22 4 26 15 11 25 9 25 25 2 3 MIN. QNH PRESSURE IN HPA 988.0 987.8 980.6 987.1 986.0 989.5 985.9 987.3 990.5 994.8 985.9 984.0 980.6 DAY 22 17 13 8 30 6 11 7 21 3 22 22 MEAN QFF PRESSURE IN HPA 1000.6 996.7 992.2 990.4 985.9 982.6 975.7 979.7 982.6 993.6 996.7 996.8 989.5 MAX. QFF PRESSURE IN HPA 1015.1 1007.1 1007.3 999.8 995.4 987.6 980.5 985.1 988.0 1002.9 1005.4 1006.5 1015.1 DAY 10 22 4 17 1 11 25 9 29 28 29 17 MIN. QFF PRESSURE IN HPA 989.1 989.8 982.4 984.1 978.7 976.8 970.7 972.1 977.3 985.8 980.0 983.0 970.7 DAY 20 17 26 28 30 6 10 7 1 1 22 22 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 813.0 811.5 810.5 812.0 812.8 812.1 808.6 811.4 811.3 816.6 815.1 813.2 812.3 MAX. QFE PRESSURE IN HPA 818.1 818.5 818.9 817.8 817.7 817.6 813.4 814.2 815.3 820.6 820.7 820.5 820.7 DAY 10 22 4 26 14 11 24 9 25 25 2 3 MIN. QFE PRESSURE IN HPA 807.0 805.4 801.5 806.1 804.8 807.3 804.2 806.6 808.5 812.3 804.6 802.9 801.5 DAY 3 2 13 8 30 6 11 7 11 3 22 22 MEAN QNH PRESSURE IN HPA 996.3 994.7 993.4 995.2 996.1 995.3 991.2 994.5 994.4 1000.6 998.8 996.6 995.6 MAX. QNH PRESSURE IN HPA 1002.4 1002.9 1003.3 1002.0 1001.9 1001.8 996.8 997.8 999.1 1005.3 1005.5 1005.2 1005.5 DAY 10 22 4 26 14 11 24 9 25 25 2 3 MIN. QNH PRESSURE IN HPA 989.3 987.4 982.8 988.2 986.7 989.7 986.0 988.8 991.1 995.5 986.5 984.5 982.8 DAY 3 2 13 8 30 6 11 7 11 3 22 22 MEAN QFF PRESSURE IN HPA ****** 997.0 993.3 991.1 986.3 982.5 975.7 980.6 984.0 994.6 997.3 997.8 ****** MAX. QFF PRESSURE IN HPA ****** 1007.9 1007.9 999.6 995.8 988.6 980.6 986.6 989.3 1003.3 1006.9 1006.9 ****** DAY ** 22 4 17 1 11 25 9 29 25 29 17 MIN. QFF PRESSURE IN HPA ****** 991.6 984.6 983.6 980.9 976.5 970.4 973.9 979.9 985.3 980.3 983.4 ****** DAY ** 17 13 13 28 6 11 7 11 1 22 22 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 812.7 811.4 810.1 811.6 812.4 811.7 808.1 810.7 810.5 815.9 814.3 812.5 811.8 MAX. QFE PRESSURE IN HPA 817.3 818.0 818.5 817.1 817.5 817.2 813.6 814.1 814.2 819.8 819.6 819.6 819.8 DAY 10 22 4 26 14 11 24 26 25 27 1 3 MIN. QFE PRESSURE IN HPA 805.6 803.5 802.2 804.3 804.9 807.1 803.9 806.2 807.8 811.2 804.2 802.5 802.2 DAY 22 2 13 13 30 14 11 7 21 3 22 22 MEAN QNH PRESSURE IN HPA 996.0 994.5 992.9 994.7 995.6 994.8 990.6 993.6 993.5 999.8 997.9 995.8 995.0 MAX. QNH PRESSURE IN HPA 1001.4 1002.3 1002.9 1001.2 1001.7 1001.3 997.1 997.7 997.8 1004.4 1004.2 1004.2 1004.4 DAY 10 22 4 26 14 11 24 26 25 27 1 3 MIN. QNH PRESSURE IN HPA 987.6 985.2 983.6 986.1 986.8 989.4 985.6 988.4 990.2 994.3 986.0 984.0 983.6 DAY 22 2 13 13 30 14 11 7 21 3 22 22 MEAN QFF PRESSURE IN HPA ****** 995.9 991.4 989.7 984.5 981.3 973.8 978.0 981.3 992.2 994.4 995.0 ****** MAX. QFF PRESSURE IN HPA ****** 1005.4 1005.5 998.9 992.2 988.6 978.1 985.3 987.3 1000.8 1004.2 1004.0 ****** DAY ** 21 4 17 2 11 24 9 29 31 29 4 MIN. QFF PRESSURE IN HPA ****** 990.9 984.0 978.8 978.7 974.4 967.8 970.6 977.1 984.4 979.6 983.2 ****** DAY ** 17 13 13 29 30 11 6 11 3 22 22 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 811.8 810.2 808.6 810.4 811.2 810.4 806.7 809.1 809.0 814.5 813.2 811.5 810.5 MAX. QFE PRESSURE IN HPA 816.5 816.8 817.7 816.2 816.4 815.2 812.2 812.4 813.0 818.4 818.3 818.0 818.4 DAY 10 21 3 26 14 11 24 9 25 24 2 3 MIN. QFE PRESSURE IN HPA 805.8 801.6 802.0 804.7 804.1 806.1 802.7 804.8 806.1 809.9 803.5 800.7 800.7 DAY 21 2 13 1 30 6 10 6 21 3 22 22 MEAN QNH PRESSURE IN HPA 995.0 993.1 991.2 993.4 994.2 993.3 988.9 991.8 991.6 998.2 996.6 994.6 993.5 MAX. QNH PRESSURE IN HPA 1000.5 1000.9 1001.9 1000.2 1000.4 999.0 995.4 995.7 996.4 1002.7 1002.6 1002.3 1002.7 DAY 10 21 3 26 14 11 24 9 25 24 2 3 MIN. QNH PRESSURE IN HPA 987.9 982.9 983.4 986.6 985.9 988.2 984.2 986.7 988.2 992.7 985.2 981.9 981.9 DAY 21 2 13 1 30 6 10 6 21 3 22 22 MEAN QFF PRESSURE IN HPA ****** 994.2 989.5 988.6 983.7 979.7 972.1 976.1 978.8 990.4 993.3 994.0 ****** MAX. QFF PRESSURE IN HPA ****** 1004.4 1003.2 996.5 992.2 986.6 976.5 981.7 984.3 997.7 1001.0 1003.8 ****** DAY ** 21 3 17 1 10 24 9 25 27 29 17 MIN. QFF PRESSURE IN HPA ****** 990.2 980.9 982.4 978.1 973.1 966.7 969.8 974.4 982.6 978.7 981.1 ****** DAY ** 17 30 15 30 30 10 6 1 3 22 22 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 812.2 810.3 808.6 810.4 811.0 810.1 806.2 808.8 809.1 814.7 813.5 811.8 810.6 MAX. QFE PRESSURE IN HPA 816.7 817.0 818.3 815.9 816.6 815.0 811.2 811.9 813.2 818.5 818.5 818.4 818.5 DAY 9 21 3 26 14 10 24 9 25 24 2 2 MIN. QFE PRESSURE IN HPA 806.2 802.6 800.3 804.6 804.8 805.8 802.5 804.3 805.9 810.1 804.3 801.5 800.3 DAY 26 2 12 1 29 30 10 6 11 1 22 22 MEAN QNH PRESSURE IN HPA 995.4 993.2 991.2 993.4 994.0 992.9 988.4 991.4 991.8 998.4 997.0 994.9 993.5 MAX. QNH PRESSURE IN HPA 1000.7 1001.1 1002.6 999.8 1000.6 998.7 994.3 995.1 996.6 1002.9 1002.9 1002.7 1002.9 DAY 9 21 3 26 14 10 24 9 25 24 2 2 MIN. QNH PRESSURE IN HPA 988.4 984.1 981.4 986.5 986.7 987.9 984.0 986.1 988.0 993.0 986.1 982.8 981.4 DAY 26 2 12 1 29 30 10 6 11 1 22 22 MEAN QFF PRESSURE IN HPA 1000.7 996.0 990.8 989.7 984.4 980.7 973.3 977.4 980.7 992.5 995.8 996.1 988.2 MAX. QFF PRESSURE IN HPA 1013.6 1005.2 1005.5 996.6 992.4 987.3 977.3 982.6 986.0 1000.7 1004.5 1005.4 1013.6 DAY 9 21 3 17 14 10 2 9 25 28 29 16 MIN. QFF PRESSURE IN HPA 988.6 989.3 981.6 983.2 978.3 973.9 968.8 970.9 976.2 983.9 980.1 981.6 968.8 DAY 20 2 25 15 27 30 10 6 4 1 22 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** 811.1 809.5 811.3 811.9 811.2 807.4 810.1 810.3 815.6 814.1 812.1 ****** MAX. QFE PRESSURE IN HPA ****** 817.5 819.1 816.3 818.3 817.0 813.2 813.1 814.2 819.9 819.6 818.7 ****** DAY ** 21 3 20 14 10 24 9 25 24 2 2 MIN. QFE PRESSURE IN HPA ****** 806.2 800.3 805.8 806.1 807.3 803.0 805.0 807.3 811.1 804.9 801.8 ****** DAY ** 24 12 1 30 30 6 6 4 3 22 22 MEAN QNH PRESSURE IN HPA ****** 994.1 992.2 994.4 995.0 994.3 989.8 992.9 993.2 999.4 997.7 995.4 ****** MAX. QNH PRESSURE IN HPA ****** 1001.7 1003.6 1000.3 1002.6 1001.1 996.6 996.5 997.8 1004.5 1004.2 1003.1 ****** DAY ** 21 3 20 14 10 24 9 25 24 2 2 MIN. QNH PRESSURE IN HPA ****** 988.4 981.4 987.9 988.2 989.7 984.6 986.9 989.7 994.1 986.8 983.2 ****** DAY ** 24 12 1 30 30 6 6 4 3 22 22 MEAN QFF PRESSURE IN HPA ****** 996.0 992.1 990.5 985.1 981.5 974.4 979.1 982.7 993.6 996.3 996.4 ****** MAX. QFF PRESSURE IN HPA ****** 1006.2 1007.6 997.5 995.0 988.2 980.4 984.8 987.9 1002.1 1004.4 1007.1 ****** DAY ** 21 3 17 1 10 24 9 28 27 25 16 MIN. QFF PRESSURE IN HPA ****** 988.1 981.7 985.0 978.2 974.6 968.4 972.0 978.0 985.7 980.7 982.2 ****** DAY ** 13 25 28 27 30 6 6 4 2 22 22 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** 810.9 809.3 811.0 812.1 811.2 807.8 810.3 810.8 815.7 814.2 812.1 ****** MAX. QFE PRESSURE IN HPA ****** 817.7 818.9 816.5 817.7 816.4 814.0 813.0 814.6 820.2 819.2 818.9 ****** DAY ** 21 3 25 14 10 24 8 25 24 1 3 MIN. QFE PRESSURE IN HPA ****** 806.0 799.1 805.6 805.8 807.0 804.4 805.0 808.2 811.3 805.2 802.3 ****** DAY ** 24 12 1 29 30 10 6 16 3 22 22 MEAN QNH PRESSURE IN HPA ****** 993.9 992.0 994.0 995.3 994.2 990.2 993.2 993.8 999.5 997.7 995.3 ****** MAX. QNH PRESSURE IN HPA ****** 1001.9 1003.3 1000.5 1001.9 1000.4 997.6 996.4 998.3 1004.9 1003.7 1003.3 ****** DAY ** 21 3 25 14 10 24 8 25 24 1 3 MIN. QNH PRESSURE IN HPA ****** 988.1 980.0 987.6 987.9 989.3 986.2 986.9 990.7 994.4 987.2 983.8 ****** DAY ** 24 12 1 29 30 10 6 16 3 22 22 MEAN QFF PRESSURE IN HPA ****** 994.9 990.4 989.2 984.4 980.7 973.6 977.8 981.8 992.1 994.3 994.7 ****** MAX. QFF PRESSURE IN HPA ****** 1006.6 1006.4 997.0 994.3 987.9 980.1 983.1 987.2 999.7 1002.5 1004.2 ****** DAY ** 21 3 17 1 10 24 9 24 27 28 16 MIN. QFF PRESSURE IN HPA ****** 988.6 980.0 983.1 976.6 972.4 969.6 970.3 977.7 984.1 981.2 982.3 ****** DAY ** 13 25 14 27 30 10 5 4 3 22 22 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.7 2.7 8.2 9.1 15.6 20.3 25.6 23.3 17.5 12.8 3.7 2.2 11.7 MINIMUN AIR TEMPERATURE (C) -4.2 -1.1 2.5 3.8 8.1 11.4 16.7 13.9 5.1 3.3 -3.8 -3.5 4.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 17 8 0 0 0 0 0 0 2 1 15 15 58 DAYS WITH FREEZING MIN.<= 0 29 19 8 3 0 0 0 0 3 8 25 23 118 TEMPERATURE RECORDS LOWEST(C) -11.0 -10.0 -3.0 0.0 3.0 5.0 13.0 8.0 -4.0 -4.0 -12.0 -11.0 -12.0 DAY 16 11 1 6 1 11 26 31 27 12 25 1 MAXIMUM AIR TEMPERATURE (C) 5.2 8.6 15.8 16.2 24.2 29.7 34.4 33.3 28.9 22.6 13.1 10.0 20.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 18 31 30 14 0 0 0 93 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 8.0 18.0 25.0 25.0 29.0 33.0 37.0 37.0 34.0 28.0 21.0 14.0 37.0 DAY 21 17 24 9 17 21 4 1 3 1 1 3 DIF. BETWEEN (MAX.-MIN.) (C) 9.4 9.7 13.3 12.4 16.1 18.3 17.7 19.4 23.8 19.3 16.9 13.5 15.8 MEAN DAILY TEMP. (MDT) (C) 0.5 3.8 9.1 10.0 16.2 20.5 25.6 23.6 17.0 12.9 4.6 3.3 12.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 22.5 141.5 74.0 0.0 0.0 0.0 0.0 238.0 HEATING DEG. DAYS(BASE 18 0C) 542.0 398.0 275.0 240.5 65.0 8.0 0.0 0.0 55.0 157.5 401.0 457.0 2599.0 DEWPOINT (MEAN C) -4.1 -2.8 -2.7 1.1 4.9 6.5 7.5 4.5 -6.4 -2.3 -3.8 -4.2 -0.2 MIXING RATIO (G/KG) 3.54 3.93 3.98 5.25 6.82 7.68 8.17 6.74 3.10 4.06 3.75 3.59 5.05 VAPOUR PRESSURE (HPA) 4.60 5.08 5.16 6.77 8.80 9.89 10.50 8.72 4.09 5.37 4.97 4.73 6.56 SATURATION DEF. (HPA) 1.39 2.71 6.35 5.32 10.11 15.54 23.99 21.89 18.67 10.92 3.90 2.96 10.31 RELATIVE HUMIDITY (MEAN %) 79 70 51 62 53 44 34 33 23 40 63 68 52 RELATIVE HUMIDITY (MAX. %) 92 89 73 84 76 68 54 53 45 62 85 87 72 RELATIVE HUMIDITY (MIN. %) 61 49 32 41 31 25 20 17 9 21 34 42 32 RELATIVE HUMIDITY (MEAN% 03UTC) 86 76 67 77 73 64 53 52 45 60 83 81 68 RELATIVE HUMIDITY (MEAN% 09UTC) 68 60 38 48 38 32 23 20 14 26 47 53 39 RELATIVE HUMIDITY (MEAN% 15UTC) 80 70 43 52 40 30 26 23 12 29 54 61 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 37.1 124.9 26.4 111.1 40.4 4.0 1.0 2.2 0.0 4.6 27.6 9.0 388.3 DAYS WITH PRECIPITATION >=10 1 4 0 6 2 0 0 0 0 0 1 0 14 DAYS WITH PRECIPITATION >= 5 3 7 2 8 2 0 0 0 0 0 1 0 23 DAYS WITH PRECIPITATION >= 1 6 11 6 13 6 2 1 1 0 2 4 6 58 DAYS WITH PRECIPITATION 14 12 9 18 7 3 1 2 1 3 6 9 85 GREATEST DAILY PRECIPITATION 20.0 41.0 9.0 20.2 16.0 2.0 1.0 2.0 0.0 3.0 24.0 2.3 41.0 DAY 7 18 10 19 6 4 10 6 ** 10 7 8 DAY WITH THUNDER STORM 0 0 0 3 7 0 0 0 0 1 1 0 12 DAYS WITH SNOW OR SLEET 12 7 1 1 0 0 0 0 0 0 0 2 23 DAYS WITH DUST 1 0 2 0 2 4 1 5 4 3 0 0 22 WIND DIRECTION (PREVAILING) 135 225 225 225 270 180 90 90 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 3.8 9.8 9.8 6.0 6.3 4.1 5.6 5.7 6.1 7.7 3.0 9.0 5.5 PREVAILING WIND PERCENT 13.4 20.6 22.7 20.5 18.2 23.4 25.1 27.1 15.9 16.7 17.2 19.0 16.4 CALMS PERCENT OF WIND 54.7 43.5 42.1 36.0 33.2 23.4 6.5 9.2 5.0 13.1 36.8 25.5 27.4 NO. OF WIND OBSERVATION 247 223 247 239 247 239 247 240 239 245 239 247 2899 VECTOR WIND DIRECTION (MEAN) 212 228 233 220 248 213 126 108 182 242 237 196 211 VECTOR WIND MAGNITUDE(KNOTS) 1.5 4.2 3.3 2.0 1.2 1.7 2.3 2.1 0.7 2.7 0.8 2.8 1.6 WIND STEADINESES (MEAN %) 45.5 80.8 71.7 58.8 38.7 47.2 54.8 45.7 12.1 48.2 32.0 53.8 37.2 WIND SPEED (MEAN KNOTS) 3.3 5.2 4.6 3.4 3.1 3.6 4.2 4.6 5.8 5.6 2.5 5.2 4.3 FASTEST WIND DIRECTION 90 180 230 180 270 230 90 120 230 200 230 130 90 FASTEST WIND SPEED (KNOTS) 45 30 30 25 20 25 15 25 25 35 20 40 45 DAY 5 5 27 4 9 8 27 30 11 9 4 17 DAYS WITH SKY CLEAR (0-2)/8 11 10 13 7 19 26 23 25 27 15 20 10 206 DAYS WITH P.CLOUDY (3-6)/8 9 9 11 11 10 4 8 6 3 14 7 16 108 DAYS WITH CLOUDY (7-8)/8 11 9 7 12 2 0 0 0 0 2 3 5 51 DAYS WITH VISIBILITY =< 2 KM 6 7 2 5 0 0 0 1 0 2 0 3 26 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 812.3 810.1 810.7 809.4 812.0 810.6 810.0 815.4 826.2 829.2 830.7 826.6 816.9 MAX. QFE PRESSURE IN HPA 821.4 818.0 818.7 814.2 817.7 817.0 815.2 830.4 834.6 835.6 838.0 832.8 838.0 DAY-HOUR 19- 6 11- 6 3- 9 24- 6 17- 6 2- 6 27- 6 25-21 25- 6 28- 6 23- 6 1- 6 MIN. QFE PRESSURE IN HPA 800.1 796.8 798.4 802.1 805.2 805.0 803.6 805.0 818.0 820.6 826.3 819.3 796.8 DAY-HOUR 5-12 20-15 27-15 4-15 25-15 9-12 14-15 3-12 16-12 10-15 3-12 16-12 MEAN QNH PRESSURE IN HPA 995.5 993.0 993.7 992.1 995.2 993.5 992.8 999.2 1012.0 1015.5 1017.2 1012.5 1001.0 MAX. QNH PRESSURE IN HPA 1006.3 1002.3 1003.1 997.8 1001.9 1001.1 999.0 1016.9 1021.8 1023.0 1025.8 1019.7 1025.8 DAY-HOUR 19- 6 11- 6 3- 9 24- 6 17- 6 2- 6 27- 6 25-21 25- 6 28- 6 23- 6 1- 6 MIN. QNH PRESSURE IN HPA 981.2 977.3 979.2 983.5 987.2 986.9 985.3 986.9 1002.3 1005.3 1012.1 1003.8 977.3 DAY-HOUR 5-12 20-15 27-15 4-15 25-15 9-12 14-15 3-12 16-12 10-15 3-12 16-12 MEAN QFF PRESSURE IN HPA 998.0 992.8 989.8 987.2 986.0 981.1 977.1 985.0 1002.4 1009.1 1017.3 1013.4 994.9 MAX. QFF PRESSURE IN HPA 1014.2 1007.8 1004.1 995.1 993.9 991.3 984.2 1003.9 1016.1 1021.1 1030.1 1025.5 1030.1 DAY-HOUR 19- 6 11- 6 3- 6 24- 6 15-18 11- 6 27- 6 25- 3 26- 3 12- 6 24- 3 1- 6 MIN. QFF PRESSURE IN HPA 979.8 973.5 972.1 977.6 975.8 973.1 969.9 970.6 991.1 997.8 1006.6 1004.1 969.9 DAY-HOUR 5- 9 20-15 27-12 4-15 25-12 29-12 14-12 3-12 16-12 9-21 3-21 9-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 812.2 810.2 810.6 809.3 812.1 810.8 810.0 815.5 826.4 829.4 830.8 826.7 817.0 MAX. QFE PRESSURE IN HPA 820.6 817.3 817.0 813.8 817.1 816.0 813.8 830.2 833.9 835.0 836.9 831.6 836.9 DAY 19 11 3 24 17 2 27 26 26 28 23 1 MIN. QFE PRESSURE IN HPA 802.0 799.3 800.5 803.9 805.6 806.8 806.2 806.6 821.6 822.4 827.2 821.2 799.3 DAY 5 21 28 5 10 29 14 3 22 10 4 17 MEAN QNH PRESSURE IN HPA 995.4 993.1 993.5 992.0 995.3 993.8 992.8 999.4 1012.2 1015.8 1017.3 1012.6 1001.1 MAX. QNH PRESSURE IN HPA 1005.3 1001.4 1001.1 997.3 1001.2 999.9 997.3 1016.7 1021.0 1022.3 1024.6 1018.3 1024.6 DAY 19 11 3 24 17 2 27 26 26 28 23 1 MIN. QNH PRESSURE IN HPA 983.4 980.2 981.6 985.6 987.6 989.1 988.4 988.8 1006.5 1007.5 1013.1 1006.0 980.2 DAY 5 21 28 5 10 29 14 3 22 10 4 17 MEAN QFF PRESSURE IN HPA 997.0 992.0 989.0 986.7 985.7 981.0 976.6 984.8 1002.4 1009.1 1016.3 1012.5 994.4 MAX. QFF PRESSURE IN HPA 1008.5 1005.5 1000.4 993.0 993.0 989.3 981.3 1002.5 1014.8 1018.8 1026.1 1021.1 1026.1 DAY 25 11 3 20 16 11 27 26 26 12 24 2 MIN. QFF PRESSURE IN HPA 982.7 977.4 974.5 979.7 976.0 974.3 972.5 972.6 994.0 998.3 1007.2 1004.3 972.5 DAY 5 18 28 5 10 29 14 3 17 10 4 17 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 812.2 810.2 810.9 809.5 812.3 811.2 810.7 816.0 827.0 829.6 831.0 827.0 817.3 MAX. QFE PRESSURE IN HPA 820.3 817.3 817.6 813.6 817.1 816.7 814.8 829.9 833.7 835.1 837.1 832.0 837.1 DAY 19 11 3 24 17 2 27 26 25 28 23 1 MIN. QFE PRESSURE IN HPA 802.0 800.1 798.5 803.8 805.4 807.4 806.4 807.1 822.1 823.1 827.2 821.5 798.5 DAY 5 21 28 5 10 9 14 3 22 10 4 9 MEAN QNH PRESSURE IN HPA 995.4 993.1 993.9 992.2 995.6 994.3 993.6 1000.0 1012.9 1016.0 1017.5 1012.9 1001.4 MAX. QNH PRESSURE IN HPA 1005.0 1001.4 1001.8 997.1 1001.2 1000.7 998.5 1016.3 1020.8 1022.4 1024.8 1018.8 1024.8 DAY 19 11 3 24 17 2 27 26 25 28 23 1 MIN. QNH PRESSURE IN HPA 983.4 981.2 979.3 985.5 987.4 989.8 988.6 989.4 1007.1 1008.3 1013.1 1006.4 979.3 DAY 5 21 28 5 10 9 14 3 22 10 4 9 MEAN QFF PRESSURE IN HPA 998.4 993.5 990.7 988.0 987.2 982.6 978.9 986.8 1004.7 1010.9 1018.8 1014.7 996.3 MAX. QFF PRESSURE IN HPA 1010.1 1007.0 1003.0 994.1 993.8 991.1 983.8 1003.9 1016.1 1019.4 1030.1 1024.7 1030.1 DAY 19 11 3 24 16 11 27 25 26 12 24 1 MIN. QFF PRESSURE IN HPA 983.6 979.6 973.6 981.0 976.9 976.0 973.7 974.7 997.1 1000.9 1008.9 1006.4 973.6 DAY 5 18 28 5 10 29 14 3 16 10 4 17 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 813.2 811.0 811.9 810.3 812.9 811.6 811.2 816.4 827.6 830.3 831.8 827.7 818.0 MAX. QFE PRESSURE IN HPA 821.4 818.0 818.6 814.2 817.7 817.0 815.2 830.4 834.6 835.6 838.0 832.8 838.0 DAY 19 11 3 24 17 2 27 26 25 28 23 1 MIN. QFE PRESSURE IN HPA 803.1 802.0 799.7 805.3 805.8 807.5 806.9 807.5 822.5 823.1 828.6 822.0 799.7 DAY 5 21 28 21 10 9 14 3 16 10 14 9 MEAN QNH PRESSURE IN HPA 996.6 994.0 995.1 993.1 996.2 994.7 994.2 1000.4 1013.6 1016.8 1018.5 1013.7 1002.3 MAX. QNH PRESSURE IN HPA 1006.3 1002.3 1003.0 997.8 1001.9 1001.1 999.0 1016.9 1021.8 1023.0 1025.8 1019.7 1025.8 DAY 19 11 3 24 17 2 27 26 25 28 23 1 MIN. QNH PRESSURE IN HPA 984.7 983.4 980.7 987.3 987.9 989.9 989.2 989.9 1007.6 1008.3 1014.8 1007.0 980.7 DAY 5 21 28 21 10 9 14 3 16 10 14 9 MEAN QFF PRESSURE IN HPA 999.9 994.7 991.9 988.7 987.3 982.8 979.0 986.6 1003.6 1010.1 1018.8 1015.5 996.6 MAX. QFF PRESSURE IN HPA 1014.2 1007.8 1004.1 995.1 993.8 991.3 984.2 1003.5 1014.0 1021.1 1029.5 1025.5 1029.5 DAY 19 11 3 24 16 11 27 25 28 12 24 1 MIN. QFF PRESSURE IN HPA 983.6 982.4 977.0 982.4 977.6 976.1 973.6 975.1 996.4 1000.7 1009.3 1007.2 973.6 DAY 5 20 28 4 10 29 14 3 22 10 3 7 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 812.7 810.7 811.4 809.9 812.4 810.9 810.4 815.5 826.5 829.3 830.8 826.7 817.3 MAX. QFE PRESSURE IN HPA 820.3 817.7 818.7 813.6 817.0 816.5 814.5 828.4 833.7 834.4 836.7 831.8 836.7 DAY 18 11 3 7 16 1 27 26 25 28 24 3 MIN. QFE PRESSURE IN HPA 800.6 801.6 798.7 805.4 805.7 805.2 805.7 806.8 820.0 822.2 827.5 821.1 798.7 DAY 5 21 28 5 10 9 14 3 16 10 3 9 MEAN QNH PRESSURE IN HPA 996.0 993.6 994.5 992.7 995.7 993.9 993.3 999.4 1012.2 1015.6 1017.4 1012.6 1001.4 MAX. QNH PRESSURE IN HPA 1005.0 1001.9 1003.1 997.1 1001.1 1000.5 998.1 1014.5 1020.8 1021.6 1024.3 1018.5 1024.3 DAY 18 11 3 7 16 1 27 26 25 28 24 3 MIN. QNH PRESSURE IN HPA 981.7 982.9 979.5 987.4 987.8 987.2 987.8 989.1 1004.6 1007.2 1013.5 1005.9 979.5 DAY 5 21 28 5 10 9 14 3 16 10 3 9 MEAN QFF PRESSURE IN HPA 997.9 992.9 989.8 987.3 985.8 980.7 976.6 984.8 1001.8 1008.3 1017.0 1012.8 994.6 MAX. QFF PRESSURE IN HPA 1010.0 1006.4 1001.8 994.4 992.3 987.2 983.0 1001.5 1012.4 1017.8 1027.7 1020.1 1027.7 DAY 19 11 3 20 16 11 27 25 27 28 24 2 MIN. QFF PRESSURE IN HPA 979.8 980.5 975.0 980.0 978.0 974.2 971.6 973.0 991.8 999.0 1008.5 1006.1 971.6 DAY 5 20 28 4 10 28 14 2 16 10 3 7 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 811.5 809.2 809.8 808.7 811.1 809.6 809.2 814.2 824.9 828.2 829.6 825.7 816.0 MAX. QFE PRESSURE IN HPA 819.8 815.8 817.3 812.7 815.9 815.4 813.0 826.8 832.7 833.4 835.4 831.1 835.4 DAY 18 11 3 24 16 1 27 26 25 28 23 3 MIN. QFE PRESSURE IN HPA 800.1 798.7 798.6 803.4 805.3 805.0 804.0 805.0 818.0 820.7 826.3 819.3 798.6 DAY 5 20 28 4 25 9 14 3 16 10 3 16 MEAN QNH PRESSURE IN HPA 994.6 991.9 992.6 991.4 994.2 992.4 991.9 997.8 1010.4 1014.3 1015.9 1011.3 999.9 MAX. QNH PRESSURE IN HPA 1004.4 999.7 1001.4 996.0 999.8 999.2 996.4 1012.6 1019.6 1020.4 1022.8 1017.7 1022.8 DAY 18 11 3 24 16 1 27 26 25 28 23 3 MIN. QNH PRESSURE IN HPA 981.2 979.5 979.4 985.1 987.3 986.9 985.8 986.9 1002.3 1005.5 1012.1 1003.8 979.4 DAY 5 20 28 4 25 9 14 3 16 10 3 16 MEAN QFF PRESSURE IN HPA 996.2 990.8 987.9 986.0 984.4 979.4 975.6 982.9 1000.6 1007.5 1014.9 1011.2 993.1 MAX. QFF PRESSURE IN HPA 1007.1 1003.7 998.6 994.7 990.9 986.7 981.3 999.7 1012.2 1015.3 1024.0 1018.7 1024.0 DAY 18 11 3 20 16 1 26 25 25 28 23 2 MIN. QFF PRESSURE IN HPA 981.0 975.1 972.1 977.9 975.8 973.1 969.9 970.6 991.1 998.2 1007.5 1004.1 969.9 DAY 5 20 27 4 25 29 14 3 16 10 7 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 812.0 809.4 809.9 808.6 811.0 809.3 808.6 814.1 824.9 828.4 829.9 826.1 816.0 MAX. QFE PRESSURE IN HPA 820.4 816.0 817.0 813.0 816.3 815.0 812.4 826.5 833.1 833.3 835.5 831.5 835.5 DAY 18 10 3 23 16 1 26 25 25 28 23 3 MIN. QFE PRESSURE IN HPA 803.6 796.8 798.4 802.1 805.2 805.5 803.6 805.1 818.6 820.6 826.4 819.3 796.8 DAY 5 20 27 4 25 29 14 3 16 10 3 16 MEAN QNH PRESSURE IN HPA 995.2 992.2 992.7 991.2 994.0 992.0 991.2 997.6 1010.4 1014.5 1016.3 1011.8 999.9 MAX. QNH PRESSURE IN HPA 1005.1 999.9 1001.1 996.4 1000.3 998.7 995.7 1012.3 1020.1 1020.3 1022.9 1018.2 1022.9 DAY 18 10 3 23 16 1 26 25 25 28 23 3 MIN. QNH PRESSURE IN HPA 985.3 977.3 979.2 983.5 987.2 987.5 985.3 987.1 1003.0 1005.3 1012.2 1003.8 977.3 DAY 5 20 27 4 25 29 14 3 16 10 3 16 MEAN QFF PRESSURE IN HPA 998.1 992.4 989.3 986.9 985.4 980.2 976.4 984.1 1002.2 1009.4 1017.6 1013.5 994.6 MAX. QFF PRESSURE IN HPA 1010.1 1005.4 1000.2 993.3 991.8 987.2 982.3 1000.5 1014.7 1017.6 1029.4 1023.3 1029.4 DAY 18 10 3 19 16 10 26 25 25 28 24 2 MIN. QFF PRESSURE IN HPA 985.8 973.5 972.7 977.6 976.3 973.4 970.2 972.0 992.9 999.3 1009.2 1005.4 970.2 DAY 5 20 27 4 25 29 14 3 16 10 3 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 812.5 810.2 810.7 809.5 812.0 810.6 809.9 815.7 826.3 829.4 830.8 826.8 817.0 MAX. QFE PRESSURE IN HPA 821.1 817.2 817.6 813.6 817.4 816.6 813.6 830.0 833.9 835.0 836.1 832.2 836.1 DAY 18 10 3 24 16 1 26 25 25 27 23 2 MIN. QFE PRESSURE IN HPA 804.8 797.3 798.5 803.2 806.5 806.4 805.3 806.2 820.2 821.3 827.0 821.0 797.3 DAY 5 20 27 26 10 29 14 2 16 10 3 16 MEAN QNH PRESSURE IN HPA 995.8 993.1 993.7 992.2 995.2 993.5 992.7 999.6 1012.0 1015.7 1017.4 1012.7 1001.1 MAX. QNH PRESSURE IN HPA 1005.9 1001.3 1001.8 997.1 1001.6 1000.6 997.1 1016.4 1021.0 1022.3 1023.6 1019.0 1023.6 DAY 18 10 3 24 16 1 26 25 25 27 23 2 MIN. QNH PRESSURE IN HPA 986.7 977.9 979.3 984.8 988.7 988.6 987.3 988.4 1004.9 1006.2 1012.9 1005.8 977.9 DAY 5 20 27 26 10 29 14 2 16 10 3 16 MEAN QFF PRESSURE IN HPA 999.0 993.6 990.4 987.7 986.2 981.5 977.5 985.5 1002.2 1009.1 1017.8 1014.4 995.4 MAX. QFF PRESSURE IN HPA 1013.7 1007.1 1002.1 993.8 993.9 990.2 983.2 1003.5 1013.8 1018.6 1027.5 1023.9 1027.5 DAY 18 10 3 24 15 10 26 25 26 27 24 2 MIN. QFF PRESSURE IN HPA 986.8 974.6 973.8 978.2 979.1 974.4 971.2 973.0 992.8 999.3 1006.8 1006.4 971.2 DAY 5 20 27 4 9 29 14 2 16 9 3 19 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 812.3 810.3 810.8 809.4 812.4 810.8 810.0 815.8 826.4 829.5 830.9 826.6 817.1 MAX. QFE PRESSURE IN HPA 821.1 817.3 817.5 814.0 817.6 816.4 813.9 830.4 833.9 835.1 836.8 831.8 836.8 DAY 18 10 3 23 16 1 30 25 25 27 22 3 MIN. QFE PRESSURE IN HPA 804.2 798.8 801.5 803.4 806.4 806.7 806.0 807.2 821.5 822.3 827.0 820.5 798.8 DAY 4 20 27 4 9 28 13 2 16 10 3 16 MEAN QNH PRESSURE IN HPA 995.5 993.1 993.8 992.1 995.6 993.8 992.9 999.6 1012.2 1015.9 1017.5 1012.4 1001.2 MAX. QNH PRESSURE IN HPA 1005.9 1001.4 1001.7 997.6 1001.8 1000.4 997.4 1016.9 1021.0 1022.4 1024.4 1018.5 1024.4 DAY 18 10 3 23 16 1 30 25 25 27 22 3 MIN. QNH PRESSURE IN HPA 986.0 979.6 982.8 985.1 988.6 988.9 988.1 989.5 1006.4 1007.3 1012.9 1005.2 979.6 DAY 4 20 27 4 9 28 13 2 16 10 3 16 MEAN QFF PRESSURE IN HPA 997.5 992.6 989.1 986.8 985.9 981.0 976.1 984.4 1001.7 1008.6 1017.0 1012.8 994.5 MAX. QFF PRESSURE IN HPA 1011.3 1005.5 1000.5 994.1 993.7 990.4 981.9 1002.9 1013.5 1018.2 1026.2 1022.1 1026.2 DAY 18 10 2 23 15 10 26 25 26 28 22 1 MIN. QFF PRESSURE IN HPA 985.2 978.2 975.8 978.6 977.2 973.8 971.6 973.2 993.5 997.8 1006.6 1005.4 971.6 DAY 4 20 27 4 9 28 14 2 16 9 3 16 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.4 4.4 5.4 10.6 12.0 19.6 25.2 24.2 19.1 13.6 4.4 -2.5 11.5 MINIMUN AIR TEMPERATURE (C) -3.5 -0.7 -0.9 4.5 5.4 7.7 13.0 12.5 6.9 4.1 -4.6 -8.2 3.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 17 8 10 0 0 0 0 0 0 0 20 25 80 DAYS WITH FREEZING MIN.<= 0 22 16 17 3 0 0 0 0 0 8 26 30 122 TEMPERATURE RECORDS LOWEST(C) -11.0 -9.0 -10.0 -2.0 2.0 5.0 9.0 8.0 3.0 -3.0 -11.0 -29.0 -29.0 DAY 9 4 9 2 2 4 1 29 30 29 27 28 MAXIMUM AIR TEMPERATURE (C) 9.3 11.0 12.5 17.2 18.6 29.5 35.3 34.7 30.3 23.1 14.7 5.6 20.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 17 31 31 22 0 0 0 101 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 7 7 TEMPERATURE RECORDS HIGHEST(C) 15.0 16.0 20.0 21.0 25.0 33.0 39.0 38.0 35.0 29.0 20.0 17.0 39.0 DAY 15 19 24 9 25 26 18 12 2 1 2 24 DIF. BETWEEN (MAX.-MIN.) (C) 12.8 11.7 13.4 12.7 13.2 21.8 22.3 22.2 23.4 19.0 19.3 13.8 17.1 MEAN DAILY TEMP. (MDT) (C) 2.9 5.1 5.8 10.8 12.0 18.6 24.1 23.6 18.6 13.6 5.1 -1.3 11.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.0 99.0 80.5 0.0 0.0 0.0 0.0 180.5 HEATING DEG. DAYS(BASE 18 0C) 468.0 360.5 377.5 215.0 186.0 10.5 0.0 0.0 11.5 139.0 388.5 597.5 2754.0 DEWPOINT (MEAN C) -4.3 -3.2 -5.4 1.8 4.9 1.8 3.4 1.1 -2.5 -2.1 -6.3 -6.6 -1.5 MIXING RATIO (G/KG) 3.54 3.75 3.28 5.40 6.70 5.46 6.10 5.21 3.95 4.09 3.04 3.09 4.47 VAPOUR PRESSURE (HPA) 4.67 4.94 4.31 7.08 8.76 7.16 7.97 6.82 5.22 5.41 4.03 4.08 5.87 SATURATION DEF. (HPA) 3.03 3.97 5.28 6.24 5.98 17.66 26.80 26.01 19.46 11.64 5.34 1.77 11.10 RELATIVE HUMIDITY (MEAN %) 67 62 51 59 66 37 28 26 27 38 51 77 49 RELATIVE HUMIDITY (MAX. %) 88 83 77 87 92 67 49 47 49 63 79 93 73 RELATIVE HUMIDITY (MIN. %) 44 40 29 35 41 14 13 11 12 18 25 50 28 RELATIVE HUMIDITY (MEAN% 03UTC) 82 75 68 80 87 61 47 46 47 60 75 87 68 RELATIVE HUMIDITY (MEAN% 09UTC) 52 47 38 43 49 19 17 15 16 24 33 64 35 RELATIVE HUMIDITY (MEAN% 15UTC) 56 50 38 45 51 17 15 14 15 25 38 73 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 66.2 12.8 27.9 65.9 80.4 1.0 0.0 0.0 0.0 1.0 1.4 45.6 302.2 DAYS WITH PRECIPITATION >=10 2 0 1 3 3 0 0 0 0 0 0 0 9 DAYS WITH PRECIPITATION >= 5 4 1 2 4 8 0 0 0 0 0 0 4 23 DAYS WITH PRECIPITATION >= 1 6 4 4 8 12 1 0 0 0 1 1 9 46 DAYS WITH PRECIPITATION 8 11 9 14 16 1 0 1 0 2 2 10 74 GREATEST DAILY PRECIPITATION 32.0 5.0 20.0 27.0 10.0 1.0 0.0 0.0 0.0 1.0 1.2 8.0 32.0 DAY 29 26 27 29 3 29 ** ** ** 6 3 1 DAY WITH THUNDER STORM 0 1 0 5 5 1 0 0 0 2 0 0 14 DAYS WITH SNOW OR SLEET 1 1 2 0 0 0 0 0 0 0 0 8 12 DAYS WITH DUST 1 1 1 2 1 3 5 10 6 5 0 0 35 WIND DIRECTION (PREVAILING) 180 225 180 225 225 315 180 180 270 180 90 315 180 PREVAILING WIND SPEED(KNOTS) 11.4 11.0 16.5 9.0 7.7 4.7 5.7 4.9 6.2 8.2 6.0 4.9 9.7 PREVAILING WIND PERCENT 20.6 20.2 22.3 20.1 16.2 16.3 17.4 15.8 13.8 17.4 9.2 13.0 14.4 CALMS PERCENT OF WIND 29.1 30.5 14.2 33.1 45.3 37.7 27.5 30.0 39.7 30.8 61.1 50.2 35.7 NO. OF WIND OBSERVATION 247 223 247 239 247 239 247 247 239 247 239 247 2908 VECTOR WIND DIRECTION (MEAN) 189 216 215 200 221 243 181 130 235 218 152 306 210 VECTOR WIND MAGNITUDE(KNOTS) 2.7 4.5 6.6 2.9 1.9 2.2 1.5 1.2 1.7 2.3 0.4 0.3 2.1 WIND STEADINESES (MEAN %) 50.0 68.2 68.7 49.2 47.5 55.0 35.7 24.0 44.7 53.5 22.2 10.0 43.7 WIND SPEED (MEAN KNOTS) 5.4 6.6 9.6 5.9 4.0 4.0 4.2 5.0 3.8 4.3 1.8 3.0 4.8 FASTEST WIND DIRECTION 180 200 200 180 90 270 90 130 250 230 130 90 90 FASTEST WIND SPEED (KNOTS) 35 40 40 40 30 30 30 25 30 20 35 45 45 DAY 22 25 5 18 1 29 29 8 17 6 2 30 DAYS WITH SKY CLEAR (0-2)/8 11 11 12 3 8 29 29 28 27 20 20 13 211 DAYS WITH P.CLOUDY (3-6)/8 5 8 14 14 14 1 2 3 3 11 7 12 94 DAYS WITH CLOUDY (7-8)/8 15 9 5 13 9 0 0 0 0 0 3 6 60 DAYS WITH VISIBILITY =< 2 KM 3 2 1 8 5 0 0 0 0 0 1 10 30 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 826.1 824.8 821.8 822.2 822.2 824.1 821.1 821.6 826.5 828.7 827.5 825.7 824.4 MAX. QFE PRESSURE IN HPA 829.8 832.8 830.3 829.8 827.4 830.0 824.6 825.6 835.6 832.7 832.5 834.1 835.6 DAY-HOUR 19- 6 4- 6 23- 6 2- 6 24- 6 2- 6 25- 6 5- 6 24- 6 18- 6 6- 6 21- 6 MIN. QFE PRESSURE IN HPA 820.7 817.0 813.5 816.4 815.0 818.2 816.8 816.7 818.7 824.7 823.3 812.5 812.5 DAY-HOUR 26-12 12- 3 5-12 16-12 11- 0 15-15 12-15 12-15 3-12 25-12 21-12 31- 3 MEAN QNH PRESSURE IN HPA 1011.8 1010.3 1006.8 1007.3 1007.2 1009.4 1005.9 1006.5 1012.3 1014.9 1013.5 1011.4 1009.8 MAX. QNH PRESSURE IN HPA 1016.2 1019.7 1016.8 1016.2 1013.4 1016.4 1010.1 1011.2 1023.0 1019.6 1019.4 1021.3 1023.0 DAY-HOUR 19- 6 4- 6 23- 6 2- 6 24- 6 2- 6 25- 6 5- 6 24- 6 18- 6 6- 6 21- 6 MIN. QNH PRESSURE IN HPA 1005.5 1001.1 997.0 1000.4 998.7 1002.5 1000.9 1000.7 1003.1 1010.2 1008.5 995.8 995.8 DAY-HOUR 26-12 12- 3 5-12 16-12 11- 0 15-15 12-15 12-15 3-12 25-12 21-12 31- 3 MEAN QFF PRESSURE IN HPA 1012.7 1009.6 1005.2 1001.9 1000.7 998.2 991.0 992.3 1001.6 1007.9 1013.0 1015.9 1004.2 MAX. QFF PRESSURE IN HPA 1022.1 1024.9 1017.4 1013.2 1007.8 1007.5 995.8 997.8 1013.3 1015.1 1021.7 1037.7 1037.7 DAY-HOUR 9- 6 4- 6 23- 3 2- 3 8- 3 2- 6 25- 3 31- 3 24- 6 12- 3 27- 3 27-15 MIN. QFF PRESSURE IN HPA 1002.2 995.8 993.5 994.0 993.9 991.0 985.6 986.1 990.8 999.5 1003.5 996.8 985.6 DAY-HOUR 26- 9 25-12 5-12 28-15 11- 9 15-15 12-15 12-12 3-12 23- 0 3- 0 10-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 826.3 824.6 821.9 822.1 822.0 824.3 821.2 821.8 826.7 828.7 827.6 825.7 824.4 MAX. QFE PRESSURE IN HPA 829.2 830.8 829.3 829.2 826.0 828.6 823.6 824.4 834.0 831.4 830.9 833.4 834.0 DAY 29 4 23 2 8 28 25 5 25 9 6 22 MIN. QFE PRESSURE IN HPA 822.1 817.1 816.4 817.7 815.0 818.6 819.0 818.5 821.2 825.0 824.0 813.0 813.0 DAY 4 12 5 16 11 16 13 13 3 25 25 31 MEAN QNH PRESSURE IN HPA 1012.1 1010.1 1006.8 1007.1 1007.0 1009.7 1006.1 1006.8 1012.6 1014.9 1013.6 1011.3 1009.8 MAX. QNH PRESSURE IN HPA 1015.5 1017.4 1015.6 1015.5 1011.7 1014.8 1008.9 1009.8 1021.1 1018.1 1017.5 1020.4 1021.1 DAY 29 4 23 2 8 28 25 5 25 9 6 22 MIN. QNH PRESSURE IN HPA 1007.1 1001.2 1000.4 1001.9 998.7 1003.0 1003.5 1002.9 1006.0 1010.5 1009.3 996.4 996.4 DAY 4 12 5 16 11 16 13 13 3 25 25 31 MEAN QFF PRESSURE IN HPA 1012.2 1008.8 1004.7 1001.4 1000.5 998.6 991.2 992.4 1001.6 1007.3 1012.1 1014.6 1003.8 MAX. QFF PRESSURE IN HPA 1018.7 1021.0 1015.1 1012.2 1006.4 1004.0 995.1 997.4 1010.6 1012.2 1018.2 1035.6 1035.6 DAY 9 4 23 2 8 13 6 5 25 18 27 27 MIN. QFF PRESSURE IN HPA 1004.5 998.7 995.7 995.1 994.3 992.1 985.8 987.6 992.7 999.5 1003.5 997.8 985.8 DAY 24 25 16 18 11 16 28 13 4 23 3 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 826.3 824.8 822.1 822.5 822.4 824.8 821.9 822.5 827.2 829.1 827.9 825.7 824.8 MAX. QFE PRESSURE IN HPA 828.8 831.2 829.9 828.8 827.1 829.0 824.4 825.0 834.0 831.8 831.0 833.5 834.0 DAY 19 4 23 2 24 27 25 5 24 8 5 21 MIN. QFE PRESSURE IN HPA 821.5 817.0 814.7 818.4 815.0 818.8 820.4 819.5 821.5 825.3 824.6 812.5 812.5 DAY 4 12 5 16 11 16 13 12 4 25 25 31 MEAN QNH PRESSURE IN HPA 1012.0 1010.3 1007.1 1007.6 1007.5 1010.3 1006.9 1007.6 1013.1 1015.4 1013.9 1011.4 1010.2 MAX. QNH PRESSURE IN HPA 1015.0 1017.8 1016.3 1015.0 1013.0 1015.2 1009.8 1010.5 1021.1 1018.5 1017.6 1020.5 1021.1 DAY 19 4 23 2 24 27 25 5 24 8 5 21 MIN. QNH PRESSURE IN HPA 1006.4 1001.1 998.4 1002.7 998.7 1003.2 1005.1 1004.0 1006.4 1010.9 1010.1 995.8 995.8 DAY 4 12 5 16 11 16 13 12 4 25 25 31 MEAN QFF PRESSURE IN HPA 1013.6 1010.2 1006.2 1003.0 1001.5 999.0 992.5 994.3 1003.7 1009.8 1015.0 1017.1 1005.5 MAX. QFF PRESSURE IN HPA 1021.9 1023.1 1017.4 1013.2 1007.8 1004.4 995.8 997.8 1012.7 1015.1 1021.7 1036.9 1036.9 DAY 9 4 23 2 8 2 25 31 24 12 27 28 MIN. QFF PRESSURE IN HPA 1003.6 1000.2 995.1 996.0 994.0 991.7 989.6 990.6 995.1 1001.5 1005.2 1000.3 989.6 DAY 26 23 16 11 11 16 12 12 3 23 3 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 827.3 825.9 822.8 823.1 822.8 825.0 822.2 822.9 827.7 830.0 828.8 826.6 825.4 MAX. QFE PRESSURE IN HPA 829.8 832.8 830.3 829.8 827.4 830.0 824.6 825.6 835.6 832.7 832.5 834.1 835.6 DAY 19 4 23 2 24 2 25 5 24 18 6 21 MIN. QFE PRESSURE IN HPA 822.6 818.1 813.9 818.7 815.6 818.9 820.4 819.6 821.7 826.4 825.0 813.5 813.5 DAY 26 12 5 16 11 16 12 12 3 25 25 31 MEAN QNH PRESSURE IN HPA 1013.2 1011.6 1007.9 1008.3 1007.9 1010.5 1007.2 1008.0 1013.7 1016.4 1015.0 1012.4 1011.0 MAX. QNH PRESSURE IN HPA 1016.2 1019.7 1016.8 1016.2 1013.4 1016.4 1010.1 1011.2 1023.0 1019.6 1019.4 1021.3 1023.0 DAY 19 4 23 2 24 2 25 5 24 18 6 21 MIN. QNH PRESSURE IN HPA 1007.7 1002.4 997.4 1003.1 999.4 1003.3 1005.1 1004.2 1006.6 1012.2 1010.5 997.0 997.0 DAY 26 12 5 16 11 16 12 12 3 25 25 31 MEAN QFF PRESSURE IN HPA 1014.7 1011.4 1006.7 1003.1 1001.4 999.2 992.3 993.5 1002.7 1009.3 1014.7 1017.6 1005.5 MAX. QFF PRESSURE IN HPA 1022.1 1024.9 1016.2 1013.1 1006.9 1007.5 994.9 997.7 1013.3 1015.1 1021.5 1035.5 1035.5 DAY 9 4 23 2 8 2 25 5 24 18 27 27 MIN. QFF PRESSURE IN HPA 1006.0 1000.6 993.9 997.0 994.1 991.4 989.4 989.2 993.8 1002.6 1006.9 1001.4 989.2 DAY 26 25 5 15 11 16 12 12 4 25 3 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 826.0 825.3 822.1 822.5 822.5 824.3 821.3 821.8 826.7 828.8 827.6 825.8 824.6 MAX. QFE PRESSURE IN HPA 828.7 831.5 829.1 828.7 827.2 829.4 823.6 824.9 834.5 831.5 831.1 833.0 834.5 DAY 29 4 23 2 24 27 25 5 24 9 6 20 MIN. QFE PRESSURE IN HPA 820.9 818.1 814.5 817.4 816.0 818.5 818.9 818.5 820.4 825.1 824.8 814.0 814.0 DAY 26 12 5 16 11 16 27 12 3 25 25 31 MEAN QNH PRESSURE IN HPA 1011.7 1010.9 1007.1 1007.5 1007.6 1009.7 1006.1 1006.8 1012.5 1015.0 1013.6 1011.4 1010.0 MAX. QNH PRESSURE IN HPA 1014.9 1018.2 1015.4 1014.9 1013.1 1015.7 1008.9 1010.4 1021.7 1018.2 1017.7 1020.0 1021.7 DAY 29 4 23 2 24 27 25 5 24 9 6 20 MIN. QNH PRESSURE IN HPA 1005.7 1002.4 998.1 1001.6 999.9 1002.9 1003.3 1002.9 1005.1 1010.6 1010.3 997.6 997.6 DAY 26 12 5 16 11 16 27 12 3 25 25 31 MEAN QFF PRESSURE IN HPA 1012.1 1010.0 1005.1 1001.4 1000.8 998.2 990.5 991.9 1000.8 1007.1 1012.4 1015.4 1003.8 MAX. QFF PRESSURE IN HPA 1019.0 1022.0 1013.8 1010.8 1005.7 1004.2 993.6 997.1 1010.2 1011.6 1018.2 1033.1 1033.1 DAY 9 4 8 2 8 4 17 5 24 18 27 27 MIN. QFF PRESSURE IN HPA 1002.2 996.8 996.2 994.4 993.9 991.3 986.8 986.3 991.8 1000.2 1005.3 1000.6 986.3 DAY 26 25 5 18 11 16 28 12 3 25 25 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 825.1 823.9 820.7 821.5 821.4 823.1 820.0 820.4 825.2 827.6 826.4 824.8 823.3 MAX. QFE PRESSURE IN HPA 828.3 829.9 826.7 826.7 825.7 828.0 822.8 824.0 832.7 830.3 829.8 832.1 832.7 DAY 5 4 23 2 8 27 25 5 24 8 5 21 MIN. QFE PRESSURE IN HPA 820.7 817.5 813.5 816.4 816.3 818.8 817.5 817.0 818.7 824.7 823.3 814.5 813.5 DAY 26 12 5 16 1 15 12 12 3 25 21 10 MEAN QNH PRESSURE IN HPA 1010.7 1009.3 1005.5 1006.4 1006.3 1008.3 1004.7 1005.0 1010.8 1013.6 1012.2 1010.3 1008.6 MAX. QNH PRESSURE IN HPA 1014.4 1016.3 1012.5 1012.5 1011.4 1014.1 1007.9 1009.3 1019.6 1016.8 1016.2 1018.9 1019.6 DAY 5 4 23 2 8 27 25 5 24 8 5 21 MIN. QNH PRESSURE IN HPA 1005.5 1001.7 997.0 1000.4 1000.3 1003.2 1001.7 1001.1 1003.1 1010.2 1008.5 998.1 997.0 DAY 26 12 5 16 1 15 12 12 3 25 21 10 MEAN QFF PRESSURE IN HPA 1010.8 1007.9 1003.3 1000.7 999.7 997.3 989.7 990.7 999.8 1006.1 1010.7 1013.7 1002.5 MAX. QFF PRESSURE IN HPA 1016.9 1018.8 1011.5 1008.5 1005.9 1003.6 993.2 996.8 1009.5 1010.2 1015.4 1032.4 1032.4 DAY 5 4 8 1 8 4 25 5 24 9 27 27 MIN. QFF PRESSURE IN HPA 1002.5 995.8 993.5 994.0 994.8 992.0 986.2 986.1 990.8 999.9 1005.4 997.5 986.1 DAY 26 25 5 11 10 30 28 12 3 23 1 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 825.5 824.1 821.0 821.5 821.2 822.7 819.6 820.1 825.2 827.8 826.7 825.2 823.4 MAX. QFE PRESSURE IN HPA 829.0 830.6 827.1 826.9 826.2 827.2 821.9 823.2 832.4 830.3 829.7 833.0 833.0 DAY 28 4 22 1 8 27 25 5 24 9 18 21 MIN. QFE PRESSURE IN HPA 821.0 817.5 815.2 816.5 815.5 818.2 816.8 816.7 818.9 825.4 823.8 813.4 813.4 DAY 3 12 5 16 10 15 12 12 3 31 21 30 MEAN QNH PRESSURE IN HPA 1011.1 1009.5 1005.8 1006.5 1006.1 1007.8 1004.1 1004.8 1010.8 1013.8 1012.5 1010.8 1008.6 MAX. QNH PRESSURE IN HPA 1015.2 1017.1 1013.0 1012.8 1011.9 1013.1 1006.9 1008.4 1019.2 1016.8 1016.1 1020.0 1020.0 DAY 28 4 22 1 8 27 25 5 24 9 18 21 MIN. QNH PRESSURE IN HPA 1005.8 1001.7 999.0 1000.5 999.3 1002.5 1000.9 1000.7 1003.3 1011.0 1009.1 996.8 996.8 DAY 3 12 5 16 10 15 12 12 3 31 21 30 MEAN QFF PRESSURE IN HPA 1012.7 1009.2 1004.8 1001.8 1000.0 996.7 989.8 991.6 1001.4 1008.3 1013.5 1016.6 1003.9 MAX. QFF PRESSURE IN HPA 1019.1 1021.1 1012.0 1010.0 1007.4 1002.1 992.7 995.4 1010.4 1012.4 1019.3 1037.7 1037.7 DAY 5 4 8 1 8 4 25 5 24 9 27 27 MIN. QFF PRESSURE IN HPA 1004.0 998.0 995.8 994.0 993.9 991.0 985.6 986.7 992.2 1002.9 1007.3 998.1 985.6 DAY 24 25 5 28 10 15 12 12 3 23 3 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 826.3 825.0 822.0 822.5 822.7 824.0 821.1 821.7 826.7 828.8 827.5 826.0 824.5 MAX. QFE PRESSURE IN HPA 828.9 831.2 829.0 828.6 826.6 828.6 822.8 824.0 834.0 831.2 831.0 833.5 834.0 DAY 5 3 22 1 8 27 20 5 24 8 5 21 MIN. QFE PRESSURE IN HPA 822.1 818.2 816.0 817.7 815.8 818.7 818.0 818.6 820.8 826.3 824.3 814.0 814.0 DAY 26 11 30 15 10 15 12 12 3 30 30 10 MEAN QNH PRESSURE IN HPA 1012.0 1010.5 1007.0 1007.5 1007.8 1009.4 1005.9 1006.6 1012.5 1015.0 1013.4 1011.7 1009.9 MAX. QNH PRESSURE IN HPA 1015.1 1017.8 1015.2 1014.8 1012.4 1014.8 1007.9 1009.3 1021.1 1017.8 1017.6 1020.5 1021.1 DAY 5 3 22 1 8 27 20 5 24 8 5 21 MIN. QNH PRESSURE IN HPA 1007.1 1002.5 999.9 1001.9 999.7 1003.1 1002.3 1003.0 1005.6 1012.1 1009.7 997.6 997.6 DAY 26 11 30 15 10 15 12 12 3 30 30 10 MEAN QFF PRESSURE IN HPA 1013.4 1010.3 1005.8 1002.2 1001.2 998.0 991.0 992.2 1001.6 1008.1 1013.1 1017.1 1004.5 MAX. QFF PRESSURE IN HPA 1020.3 1022.6 1015.2 1011.8 1006.2 1003.9 994.4 996.8 1009.1 1013.1 1019.8 1036.5 1036.5 DAY 8 4 8 1 7 4 5 30 24 11 26 27 MIN. QFF PRESSURE IN HPA 1004.5 1000.1 995.3 995.9 994.2 991.3 986.3 987.5 993.0 1002.0 1006.8 997.8 986.3 DAY 26 25 30 15 10 15 12 7 3 1 2 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 826.3 824.9 822.1 822.4 822.3 824.5 821.4 821.9 826.9 828.9 827.8 826.1 824.6 MAX. QFE PRESSURE IN HPA 828.9 831.0 829.3 829.6 826.2 828.8 823.4 824.6 834.0 831.5 831.0 833.5 834.0 DAY 5 3 22 1 7 27 25 4 24 8 5 21 MIN. QFE PRESSURE IN HPA 822.2 818.0 816.0 817.2 815.8 818.7 818.7 818.4 821.0 826.0 824.0 813.0 813.0 DAY 3 11 19 15 10 15 12 12 3 24 24 10 MEAN QNH PRESSURE IN HPA 1012.0 1010.4 1007.1 1007.5 1007.4 1009.9 1006.2 1006.9 1012.8 1015.2 1013.8 1011.9 1010.1 MAX. QNH PRESSURE IN HPA 1015.1 1017.6 1015.6 1015.9 1011.9 1015.0 1008.6 1010.1 1021.1 1018.2 1017.6 1020.5 1021.1 DAY 5 3 22 1 7 27 25 4 24 8 5 21 MIN. QNH PRESSURE IN HPA 1007.2 1002.3 999.9 1001.3 999.7 1003.1 1003.1 1002.7 1005.8 1011.7 1009.3 996.4 996.4 DAY 3 11 19 15 10 15 12 12 3 24 24 10 MEAN QFF PRESSURE IN HPA 1012.2 1009.3 1005.3 1001.5 1000.6 998.5 990.8 992.0 1001.0 1007.2 1012.5 1015.7 1003.9 MAX. QFF PRESSURE IN HPA 1018.5 1021.5 1014.5 1012.9 1005.7 1004.5 994.0 996.5 1008.5 1011.3 1019.0 1034.4 1034.4 DAY 8 4 8 1 7 4 6 30 23 9 26 26 MIN. QFF PRESSURE IN HPA 1005.0 1000.0 997.5 994.5 994.4 991.7 986.8 987.3 991.5 1000.0 1003.8 996.8 986.8 DAY 25 24 30 28 10 15 27 12 3 1 2 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -16.3 -0.1 7.6 9.7 16.8 21.9 26.4 24.5 19.1 10.0 4.5 -3.8 10.0 MINIMUN AIR TEMPERATURE (C) -24.0 -5.7 -0.1 2.2 5.2 9.5 13.4 11.5 6.1 -2.0 -3.9 -10.5 0.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 29 20 3 0 0 0 0 0 0 4 18 29 103 DAYS WITH FREEZING MIN.<= 0 31 29 19 13 3 0 0 0 0 25 26 31 177 TEMPERATURE RECORDS LOWEST(C) -34.0 -15.0 -6.0 -3.0 -3.0 7.0 9.0 6.0 2.0 -7.0 -13.0 -18.0 -34.0 DAY 7 7 9 16 2 11 2 28 28 29 29 20 MAXIMUM AIR TEMPERATURE (C) -7.2 6.3 14.4 16.6 25.6 31.7 36.7 35.3 30.7 21.9 13.5 3.1 19.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 29 31 31 18 0 0 0 110 DAYS WITH MAXIMUM TEMP. <= 0 24 0 0 0 0 0 0 0 0 0 0 14 38 TEMPERATURE RECORDS HIGHEST(C) 4.0 13.0 22.0 24.0 30.0 34.0 40.0 39.0 36.0 29.0 20.0 13.0 40.0 DAY 18 22 26 29 21 24 12 14 3 1 15 6 DIF. BETWEEN (MAX.-MIN.) (C) 16.8 12.0 14.5 14.4 20.4 22.2 23.3 23.8 24.6 23.9 17.4 13.6 18.9 MEAN DAILY TEMP. (MDT) (C) -15.6 0.3 7.1 9.4 15.4 20.6 25.0 23.4 18.4 10.0 4.8 -3.7 9.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 8.5 124.5 79.0 5.5 0.0 0.0 0.0 217.5 HEATING DEG. DAYS(BASE 18 0C)1041.0 514.0 336.5 258.0 82.5 0.0 0.0 0.0 23.5 249.5 396.0 673.5 3574.5 DEWPOINT (MEAN C) -19.3 -4.3 -2.6 -3.3 -3.4 -0.4 1.4 -2.0 -5.1 -7.8 -5.8 -7.2 -5.0 MIXING RATIO (G/KG) 1.30 3.48 4.01 3.76 3.84 4.67 5.31 4.25 3.32 2.63 3.19 2.81 3.55 VAPOUR PRESSURE (HPA) 1.72 4.58 5.27 4.93 5.06 6.12 6.94 5.56 4.38 3.50 4.21 3.72 4.67 SATURATION DEF. (HPA) 0.49 1.80 5.68 7.91 15.73 22.26 30.44 28.36 20.63 10.59 5.17 1.32 12.53 RELATIVE HUMIDITY (MEAN %) 78 76 55 47 30 27 22 21 23 32 54 81 46 RELATIVE HUMIDITY (MAX. %) 90 94 81 75 53 48 39 38 41 55 80 94 66 RELATIVE HUMIDITY (MIN. %) 65 51 31 24 13 11 10 8 9 14 29 60 27 RELATIVE HUMIDITY (MEAN% 03UTC) 79 87 75 66 50 43 37 36 39 52 72 90 61 RELATIVE HUMIDITY (MEAN% 09UTC) 77 64 42 33 16 15 15 13 13 19 40 71 35 RELATIVE HUMIDITY (MEAN% 15UTC) 80 68 41 36 17 13 12 10 11 19 43 78 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 3.5 15.0 8.6 28.0 0.9 0.0 0.0 0.0 0.0 0.0 25.3 20.1 101.4 DAYS WITH PRECIPITATION >=10 0 0 0 1 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 0 1 0 2 0 0 0 0 0 0 1 2 6 DAYS WITH PRECIPITATION >= 1 1 4 3 6 0 0 0 0 0 0 8 4 26 DAYS WITH PRECIPITATION 9 11 16 11 2 0 0 0 0 0 9 7 65 GREATEST DAILY PRECIPITATION 2.0 6.0 3.0 10.0 0.6 0.0 0.0 0.0 0.0 0.0 9.0 9.0 10.0 DAY 4 3 29 9 26 ** ** ** ** ** 22 12 DAY WITH THUNDER STORM 0 0 1 1 1 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 7 9 4 4 0 0 0 0 0 0 1 8 33 DAYS WITH DUST 2 0 6 7 2 0 2 1 4 3 2 0 29 WIND DIRECTION (PREVAILING) 180 225 180 *** *** *** *** *** *** *** *** *** *** PREVAILING WIND SPEED(KNOTS) 14.5 11.9 12.5 **** **** **** **** **** **** **** **** **** **** PREVAILING WIND PERCENT 10.9 8.7 33.2 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** CALMS PERCENT OF WIND 66.8 64.1 26.7 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** NO. OF WIND OBSERVATION 247 231 247 61 0 0 0 0 0 0 0 0 786 VECTOR WIND DIRECTION (MEAN) 178 223 192 *** *** *** *** *** *** *** *** *** *** VECTOR WIND MAGNITUDE(KNOTS) 1.9 1.4 6.0 **** **** **** **** **** **** **** **** **** **** WIND STEADINESES (MEAN %) 55.9 53.8 74.1 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** WIND SPEED (MEAN KNOTS) 3.4 2.6 8.1 **** **** **** **** **** **** **** **** **** **** FASTEST WIND DIRECTION 180 230 180 *** *** *** *** *** *** *** *** *** *** FASTEST WIND SPEED (KNOTS) 60 35 60 *** *** *** *** *** *** *** *** *** *** DAY 18 1 26 ** ** ** ** ** ** ** ** ** DAYS WITH SKY CLEAR (0-2)/8 19 8 6 13 24 26 30 31 30 30 18 10 245 DAYS WITH P.CLOUDY (3-6)/8 10 14 17 15 5 4 1 0 0 1 9 9 85 DAYS WITH CLOUDY (7-8)/8 2 7 8 2 2 0 0 0 0 0 3 12 36 DAYS WITH VISIBILITY =< 2 KM 12 5 4 7 0 0 1 0 2 0 2 6 39 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 825.9 823.4 823.1 821.1 825.0 822.1 820.2 820.4 825.4 829.4 827.8 828.3 824.3 MAX. QFE PRESSURE IN HPA 834.0 829.9 828.8 831.8 828.9 829.9 825.1 825.3 831.6 834.0 834.9 834.6 834.9 DAY-HOUR 30- 6 1- 0 23- 6 24- 6 24- 6 3- 6 22- 6 31- 6 29- 6 21- 6 2- 6 1- 6 MIN. QFE PRESSURE IN HPA 808.0 815.8 817.4 810.3 819.2 816.5 814.5 815.6 820.5 821.9 809.9 818.6 808.0 DAY-HOUR 18-12 3-12 12- 9 17-15 6-15 27-15 7-15 17-12 9-12 3-12 27- 9 24-12 MEAN QNH PRESSURE IN HPA 1011.6 1008.6 1008.3 1005.9 1010.6 1007.1 1004.8 1005.0 1011.0 1015.7 1013.8 1014.4 1009.7 MAX. QNH PRESSURE IN HPA 1021.1 1016.3 1015.0 1018.5 1015.1 1016.3 1010.6 1010.9 1018.3 1021.1 1022.2 1021.8 1022.2 DAY-HOUR 30- 6 1- 0 23- 6 24- 6 24- 6 3- 6 22- 6 31- 6 29- 6 21- 6 2- 6 1- 6 MIN. QNH PRESSURE IN HPA 990.5 999.7 1001.6 993.2 1003.7 1000.5 998.1 999.4 1005.2 1006.9 992.7 1003.0 990.5 DAY-HOUR 18-12 3-12 12- 9 17-15 6-15 27-15 7-15 17-12 9-12 3-12 27- 9 24-12 MEAN QFF PRESSURE IN HPA 1027.8 1011.2 1005.3 1001.4 1001.4 994.4 989.2 990.7 1000.3 1011.3 1013.2 1020.1 1005.5 MAX. QFF PRESSURE IN HPA 1044.0 1023.7 1014.4 1020.2 1007.0 1004.5 994.4 999.0 1009.9 1020.8 1028.3 1030.0 1044.0 DAY-HOUR 7- 3 7- 6 17- 6 24- 3 2- 3 3- 3 22- 6 29- 3 30- 3 30- 3 30- 3 1- 6 MIN. QFF PRESSURE IN HPA 990.8 1001.7 996.1 989.2 994.5 986.9 981.6 983.2 993.0 996.1 993.3 1002.1 981.6 DAY-HOUR 18-12 3-12 19-12 7- 9 11-12 27-12 7-12 13-12 3- 9 3-12 27- 9 24-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 825.7 823.5 823.0 821.2 825.0 822.6 820.6 820.7 825.8 829.5 828.0 828.4 824.5 MAX. QFE PRESSURE IN HPA 831.4 829.9 827.4 830.6 828.0 828.7 823.6 823.7 829.7 833.0 833.8 833.1 833.8 DAY 30 1 23 24 10 3 22 29 30 21 2 1 MIN. QFE PRESSURE IN HPA 808.6 818.8 817.8 813.5 820.0 817.9 816.0 818.0 822.5 822.7 814.5 819.6 808.6 DAY 19 10 13 9 1 27 8 17 8 3 27 24 MEAN QNH PRESSURE IN HPA 1011.4 1008.7 1008.2 1006.0 1010.6 1007.7 1005.3 1005.5 1011.4 1015.8 1014.0 1014.5 1009.9 MAX. QNH PRESSURE IN HPA 1018.1 1016.3 1013.4 1017.1 1014.1 1014.9 1008.9 1009.0 1016.1 1020.0 1020.9 1020.1 1020.9 DAY 30 1 23 24 10 3 22 29 30 21 2 1 MIN. QNH PRESSURE IN HPA 991.2 1003.2 1002.0 997.0 1004.6 1002.2 999.9 1002.3 1007.6 1007.8 998.1 1004.2 991.2 DAY 19 10 13 9 1 27 8 17 8 3 27 24 MEAN QFF PRESSURE IN HPA 1025.9 1010.7 1004.8 1001.1 1001.6 995.7 990.0 991.2 1000.3 1010.7 1012.5 1019.4 1005.3 MAX. QFF PRESSURE IN HPA 1038.9 1021.8 1011.9 1016.7 1005.7 1003.7 993.5 997.4 1007.7 1018.2 1025.2 1027.2 1038.9 DAY 7 1 23 24 2 2 21 29 30 30 30 27 MIN. QFF PRESSURE IN HPA 995.1 1003.3 997.9 991.3 996.2 988.1 983.6 985.4 994.9 996.2 996.9 1003.3 983.6 DAY 19 23 11 7 7 27 8 13 4 3 27 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 825.5 823.6 823.4 821.4 825.6 823.1 821.1 821.3 826.3 830.0 828.1 828.4 824.8 MAX. QFE PRESSURE IN HPA 832.4 829.4 827.6 831.0 828.5 829.5 824.5 824.0 830.1 833.0 834.0 833.1 834.0 DAY 30 1 17 24 10 3 22 31 29 21 2 1 MIN. QFE PRESSURE IN HPA 810.3 819.0 818.9 813.0 820.4 818.5 816.1 818.5 822.7 822.5 811.7 819.5 810.3 DAY 19 10 13 9 1 27 8 17 8 3 27 24 MEAN QNH PRESSURE IN HPA 1011.2 1008.9 1008.6 1006.3 1011.3 1008.3 1006.0 1006.1 1012.0 1016.4 1014.1 1014.6 1010.3 MAX. QNH PRESSURE IN HPA 1019.2 1015.7 1013.6 1017.6 1014.7 1015.8 1009.9 1009.3 1016.5 1020.0 1021.1 1020.1 1021.1 DAY 30 1 17 24 10 3 22 31 29 21 2 1 MIN. QNH PRESSURE IN HPA 993.2 1003.5 1003.3 996.4 1005.1 1002.9 1000.0 1002.9 1007.8 1007.6 994.8 1004.0 993.2 DAY 19 10 13 9 1 27 8 17 8 3 27 24 MEAN QFF PRESSURE IN HPA 1028.8 1011.8 1006.4 1002.4 1002.6 995.7 990.8 992.8 1002.6 1013.4 1014.7 1021.2 1006.9 MAX. QFF PRESSURE IN HPA 1044.0 1023.2 1013.3 1020.2 1007.0 1004.5 994.2 999.0 1009.9 1020.8 1028.3 1029.6 1044.0 DAY 7 7 17 24 2 3 21 29 30 30 30 22 MIN. QFF PRESSURE IN HPA 1000.1 1004.7 999.8 991.8 997.4 989.0 984.5 987.9 996.5 998.3 995.1 1002.9 984.5 DAY 18 24 12 9 11 27 8 17 4 3 27 24 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 826.6 824.5 824.2 821.7 826.0 823.2 821.4 821.6 826.7 830.8 828.9 829.4 825.4 MAX. QFE PRESSURE IN HPA 834.0 829.0 828.8 831.8 828.9 829.9 825.1 825.3 831.6 834.0 834.9 834.6 834.9 DAY 30 1 23 24 24 3 22 31 29 21 2 1 MIN. QFE PRESSURE IN HPA 812.8 819.7 818.0 811.4 821.1 818.8 816.5 818.6 823.1 823.3 810.3 820.0 810.3 DAY 19 10 12 9 1 27 8 17 8 3 27 24 MEAN QNH PRESSURE IN HPA 1012.4 1009.9 1009.5 1006.7 1011.7 1008.4 1006.3 1006.5 1012.5 1017.3 1015.1 1015.7 1011.0 MAX. QNH PRESSURE IN HPA 1021.1 1015.2 1015.0 1018.5 1015.1 1016.3 1010.6 1010.9 1018.3 1021.1 1022.2 1021.8 1022.2 DAY 30 1 23 24 24 3 22 31 29 21 2 1 MIN. QNH PRESSURE IN HPA 996.1 1004.3 1002.3 994.5 1005.9 1003.2 1000.5 1003.0 1008.3 1008.5 993.2 1004.6 993.2 DAY 19 10 12 9 1 27 8 17 8 3 27 24 MEAN QFF PRESSURE IN HPA 1029.6 1013.3 1006.9 1002.2 1002.3 995.2 990.3 991.9 1001.6 1013.0 1014.8 1022.0 1006.9 MAX. QFF PRESSURE IN HPA 1043.6 1023.7 1014.4 1018.4 1006.1 1004.4 994.4 997.4 1008.5 1019.6 1028.0 1030.0 1043.6 DAY 13 7 17 24 2 3 22 29 30 30 30 1 MIN. QFF PRESSURE IN HPA 998.7 1005.8 998.0 990.6 995.4 989.2 984.2 987.5 994.0 998.8 994.0 1005.0 984.2 DAY 18 24 12 9 11 27 8 13 8 3 27 24 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 826.0 823.7 823.3 821.1 825.2 822.2 820.4 820.5 825.5 829.6 827.9 828.5 824.5 MAX. QFE PRESSURE IN HPA 834.0 828.2 827.5 831.0 827.7 828.7 824.2 824.0 830.3 833.0 833.5 833.7 834.0 DAY 30 16 23 24 24 3 13 31 29 21 1 1 MIN. QFE PRESSURE IN HPA 811.0 818.3 817.4 813.0 820.7 817.4 815.8 817.4 822.5 822.0 809.9 819.3 809.9 DAY 18 3 12 11 1 27 8 17 8 3 27 24 MEAN QNH PRESSURE IN HPA 1011.7 1009.0 1008.5 1006.0 1010.7 1007.2 1005.1 1005.2 1011.2 1016.0 1013.9 1014.7 1009.9 MAX. QNH PRESSURE IN HPA 1021.1 1014.3 1013.5 1017.6 1013.7 1014.9 1009.6 1009.3 1016.8 1020.0 1020.5 1020.8 1021.1 DAY 30 16 23 24 24 3 13 31 29 21 1 1 MIN. QNH PRESSURE IN HPA 994.0 1002.6 1001.6 996.4 1005.5 1001.6 999.7 1001.6 1007.6 1007.0 992.7 1003.8 992.7 DAY 18 3 12 11 1 27 8 17 8 3 27 24 MEAN QFF PRESSURE IN HPA 1027.2 1011.0 1004.8 1001.0 1001.1 993.9 989.1 990.1 999.6 1011.0 1012.3 1019.6 1005.0 MAX. QFF PRESSURE IN HPA 1039.0 1021.5 1011.0 1016.5 1005.4 1002.8 993.5 996.0 1007.1 1019.1 1026.0 1027.2 1039.0 DAY 7 7 17 24 2 2 21 28 29 31 30 27 MIN. QFF PRESSURE IN HPA 994.2 1004.1 997.3 989.2 995.1 987.8 982.7 985.0 993.0 996.5 993.3 1002.7 982.7 DAY 18 3 12 7 11 27 7 13 3 3 27 24 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 825.4 822.5 822.2 820.0 824.0 821.0 819.0 819.0 824.0 828.1 826.7 827.5 823.3 MAX. QFE PRESSURE IN HPA 832.5 826.9 826.2 829.6 826.8 827.8 822.5 822.8 829.3 831.3 832.5 832.6 832.6 DAY 30 27 17 24 25 3 13 31 29 20 30 1 MIN. QFE PRESSURE IN HPA 808.0 815.8 818.1 812.4 820.4 816.7 814.8 815.6 820.5 821.9 812.9 818.6 808.0 DAY 18 3 12 17 6 27 8 17 9 3 27 24 MEAN QNH PRESSURE IN HPA 1010.9 1007.5 1007.2 1004.7 1009.4 1005.8 1003.4 1003.5 1009.3 1014.2 1012.6 1013.5 1008.5 MAX. QNH PRESSURE IN HPA 1019.4 1012.8 1011.9 1015.9 1012.6 1013.8 1007.6 1007.9 1015.6 1017.9 1019.4 1019.5 1019.5 DAY 30 27 17 24 25 3 13 31 29 20 30 1 MIN. QNH PRESSURE IN HPA 990.5 999.7 1002.4 995.7 1005.1 1000.7 998.5 999.4 1005.2 1006.9 996.3 1003.0 990.5 DAY 18 3 12 17 6 27 8 17 9 3 27 24 MEAN QFF PRESSURE IN HPA 1025.2 1009.4 1003.7 999.7 1000.4 993.7 988.0 989.2 998.3 1009.1 1011.1 1018.3 1003.8 MAX. QFF PRESSURE IN HPA 1038.0 1019.8 1009.0 1014.0 1003.9 1002.4 991.8 995.7 1007.0 1016.8 1025.4 1025.8 1038.0 DAY 13 7 15 24 5 3 21 28 29 31 30 27 MIN. QFF PRESSURE IN HPA 990.8 1001.7 996.1 989.7 994.5 986.9 981.6 983.2 993.5 996.1 997.5 1002.1 981.6 DAY 18 3 19 7 11 27 7 13 7 3 27 24 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 825.8 822.6 822.3 820.1 823.9 820.6 818.5 818.8 824.0 828.2 827.2 827.8 823.3 MAX. QFE PRESSURE IN HPA 832.4 827.2 826.3 829.1 826.4 827.0 822.0 822.7 829.3 831.5 832.5 832.4 832.5 DAY 30 16 17 23 9 3 13 31 29 20 30 2 MIN. QFE PRESSURE IN HPA 808.5 817.7 818.0 810.3 819.2 816.5 814.5 816.0 820.7 822.6 815.3 819.0 808.5 DAY 18 10 12 17 6 27 7 17 9 4 27 24 MEAN QNH PRESSURE IN HPA 1011.4 1007.7 1007.3 1004.8 1009.2 1005.3 1002.9 1003.2 1009.3 1014.2 1013.1 1013.8 1008.5 MAX. QNH PRESSURE IN HPA 1019.2 1013.1 1012.1 1015.4 1012.2 1012.9 1007.0 1007.8 1015.6 1018.2 1019.4 1019.2 1019.4 DAY 30 16 17 23 9 3 13 31 29 20 30 2 MIN. QNH PRESSURE IN HPA 991.1 1001.9 1002.3 993.2 1003.7 1000.5 998.1 999.9 1005.5 1007.7 999.1 1003.5 991.1 DAY 18 10 12 17 6 27 7 17 9 4 27 24 MEAN QFF PRESSURE IN HPA 1028.9 1010.5 1005.0 1000.9 1000.5 992.8 987.7 989.8 999.9 1011.3 1013.7 1020.3 1005.1 MAX. QFF PRESSURE IN HPA 1041.7 1020.7 1010.1 1017.7 1004.3 1001.2 991.4 997.2 1008.9 1019.5 1027.4 1027.7 1041.7 DAY 13 7 22 23 5 3 21 28 29 31 30 27 MIN. QFF PRESSURE IN HPA 993.0 1004.0 998.2 991.0 995.5 987.2 981.9 985.3 994.1 999.0 998.9 1003.5 981.9 DAY 18 3 19 17 11 27 7 13 3 3 21 24 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 826.5 823.5 823.4 821.6 825.2 821.9 819.9 820.4 825.4 829.4 828.1 828.3 824.5 MAX. QFE PRESSURE IN HPA 832.4 828.1 827.3 830.4 828.0 828.0 823.8 824.4 830.0 832.9 833.7 832.9 833.7 DAY 30 16 17 23 9 3 13 31 29 31 1 1 MIN. QFE PRESSURE IN HPA 809.4 818.0 819.5 813.0 820.0 817.4 815.5 817.8 822.1 823.4 818.1 820.1 809.4 DAY 18 3 12 17 6 26 7 17 3 4 26 24 MEAN QNH PRESSURE IN HPA 1012.3 1008.7 1008.6 1006.5 1010.8 1006.8 1004.5 1005.1 1011.0 1015.7 1014.1 1014.5 1009.9 MAX. QNH PRESSURE IN HPA 1019.2 1014.2 1013.2 1016.9 1014.1 1014.1 1009.1 1009.8 1016.4 1019.8 1020.8 1019.8 1020.8 DAY 30 16 17 23 9 3 13 31 29 31 1 1 MIN. QNH PRESSURE IN HPA 992.1 1002.3 1004.0 996.4 1004.6 1001.6 999.3 1002.0 1007.1 1008.6 1002.4 1004.7 992.1 DAY 18 3 12 17 6 26 7 17 3 4 26 24 MEAN QFF PRESSURE IN HPA 1029.3 1011.9 1005.8 1002.1 1001.3 993.7 988.6 990.5 1000.3 1011.5 1014.0 1020.7 1005.8 MAX. QFF PRESSURE IN HPA 1040.9 1022.0 1012.4 1016.6 1005.0 1002.1 992.9 997.4 1007.6 1019.7 1027.5 1027.8 1040.9 DAY 6 7 17 23 9 3 13 28 29 31 30 1 MIN. QFF PRESSURE IN HPA 994.8 1002.9 999.3 992.1 995.4 987.5 982.9 986.5 993.1 1000.1 1001.7 1004.5 982.9 DAY 18 3 26 17 6 27 7 13 3 3 22 24 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 826.2 823.5 823.4 821.6 825.4 822.6 820.6 820.7 825.8 829.6 827.8 828.3 824.6 MAX. QFE PRESSURE IN HPA 831.9 827.9 827.2 830.6 828.6 828.7 824.0 823.7 830.0 832.8 834.0 833.0 834.0 DAY 10 27 17 23 9 3 13 28 29 20 1 1 MIN. QFE PRESSURE IN HPA 809.7 819.0 818.7 813.5 821.0 817.9 816.0 818.0 822.6 823.3 816.0 819.5 809.7 DAY 18 3 12 17 6 26 7 12 9 4 26 23 MEAN QNH PRESSURE IN HPA 1011.9 1008.8 1008.7 1006.6 1011.0 1007.6 1005.3 1005.5 1011.5 1016.0 1013.9 1014.4 1010.1 MAX. QNH PRESSURE IN HPA 1018.7 1013.9 1013.1 1017.1 1014.8 1014.9 1009.3 1009.0 1016.4 1019.7 1021.1 1020.0 1021.1 DAY 10 27 17 23 9 3 13 28 29 20 1 1 MIN. QNH PRESSURE IN HPA 992.5 1003.5 1003.1 997.0 1005.8 1002.2 999.9 1002.3 1007.7 1008.5 999.9 1004.0 992.5 DAY 18 3 12 17 6 26 7 12 9 4 26 23 MEAN QFF PRESSURE IN HPA 1027.5 1010.9 1005.0 1001.6 1001.3 994.5 989.3 990.4 999.9 1010.7 1012.4 1019.5 1005.3 MAX. QFF PRESSURE IN HPA 1039.9 1020.3 1011.4 1017.4 1005.4 1003.6 993.2 995.5 1007.2 1018.2 1025.1 1027.3 1039.9 DAY 6 7 16 23 15 1 27 28 29 29 29 26 MIN. QFF PRESSURE IN HPA 996.2 1003.6 998.4 992.0 994.9 988.1 983.1 984.6 993.3 998.8 999.4 1004.2 983.1 DAY 18 3 12 8 6 26 7 12 3 2 26 24 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -7.3 -1.3 6.0 8.5 16.7 20.6 24.5 24.3 17.8 11.8 7.4 0.4 10.8 MINIMUN AIR TEMPERATURE (C) -13.1 -7.1 -0.7 1.7 6.9 8.4 12.1 12.4 6.5 4.9 -0.1 -7.3 2.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 1 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 28 20 8 2 0 0 0 0 0 0 12 23 93 DAYS WITH FREEZING MIN.<= 0 31 24 20 14 0 0 0 0 0 3 15 28 135 TEMPERATURE RECORDS LOWEST(C) -24.0 -24.0 -8.0 -6.0 1.0 4.0 10.0 7.0 1.0 -1.0 -8.0 -18.0 -24.0 DAY 15 4 15 6 4 16 3 31 22 28 12 22 MAXIMUM AIR TEMPERATURE (C) -1.1 4.6 13.8 15.6 25.2 30.3 34.5 33.8 28.2 19.4 16.0 9.3 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 19 31 31 13 0 0 0 97 DAYS WITH MAXIMUM TEMP. <= 0 20 5 0 0 0 0 0 0 0 0 0 2 27 TEMPERATURE RECORDS HIGHEST(C) 4.0 15.0 21.0 24.0 31.0 33.0 38.0 36.0 32.0 25.0 19.0 17.0 38.0 DAY 8 28 10 25 21 3 14 2 10 13 3 1 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 11.7 14.5 13.9 18.3 21.9 22.4 21.4 21.7 14.5 16.1 16.6 17.0 MEAN DAILY TEMP. (MDT) (C) -7.1 -1.2 6.5 8.6 16.0 19.3 23.3 23.1 17.4 12.1 8.0 1.0 10.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.5 74.5 67.0 0.0 0.0 0.0 0.0 142.0 HEATING DEG. DAYS(BASE 18 0C) 778.5 538.5 355.5 281.0 66.5 2.0 0.0 0.0 33.5 181.5 300.5 527.0 3064.5 DEWPOINT (MEAN C) -8.8 -6.8 -3.2 0.1 2.2 1.6 4.8 1.3 0.0 2.3 -1.9 -7.1 -1.3 MIXING RATIO (G/KG) 2.64 2.98 3.84 4.83 5.59 5.35 6.84 5.33 4.89 5.68 4.19 2.84 4.58 VAPOUR PRESSURE (HPA) 3.47 3.92 5.06 6.33 7.35 7.03 8.92 7.00 6.44 7.47 5.54 3.75 6.02 SATURATION DEF. (HPA) 0.38 2.30 5.13 5.66 13.32 19.33 24.42 25.86 16.15 7.30 5.54 3.27 10.72 RELATIVE HUMIDITY (MEAN %) 89 70 59 59 44 33 32 26 35 58 56 62 52 RELATIVE HUMIDITY (MAX. %) 96 88 85 82 71 58 52 45 59 83 80 85 74 RELATIVE HUMIDITY (MIN. %) 81 49 30 40 23 14 17 13 17 33 31 36 32 RELATIVE HUMIDITY (MEAN% 03UTC) 89 81 79 74 66 56 49 44 54 79 77 76 69 RELATIVE HUMIDITY (MEAN% 09UTC) 91 62 43 48 29 19 21 15 23 44 39 44 40 RELATIVE HUMIDITY (MEAN% 15UTC) 88 63 42 49 28 16 20 16 23 47 43 55 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 65.2 7.1 34.6 21.5 23.8 0.2 0.0 0.1 12.0 32.3 1.9 12.5 211.2 DAYS WITH PRECIPITATION >=10 2 0 1 1 1 0 0 0 0 1 0 0 6 DAYS WITH PRECIPITATION >= 5 5 0 2 1 2 0 0 0 1 2 0 2 15 DAYS WITH PRECIPITATION >= 1 10 2 6 6 3 0 0 0 5 8 1 3 44 DAYS WITH PRECIPITATION 14 6 10 12 5 1 0 3 6 13 4 5 79 GREATEST DAILY PRECIPITATION 19.0 3.0 21.0 12.0 15.0 0.2 0.0 0.1 6.0 10.0 1.0 6.0 21.0 DAY 26 10 23 19 2 5 ** 10 29 9 9 29 DAY WITH THUNDER STORM 0 1 1 1 3 0 0 0 2 4 2 0 14 DAYS WITH SNOW OR SLEET 14 3 0 2 0 0 0 0 0 0 0 3 22 DAYS WITH DUST 2 0 4 3 7 1 7 6 5 0 0 1 36 WIND DIRECTION (PREVAILING) *** *** 225 225 225 315 180 135 180 225 225 225 *** PREVAILING WIND SPEED(KNOTS) **** **** 12.8 13.0 10.6 8.3 7.0 12.1 5.0 12.6 9.7 9.7 **** PREVAILING WIND PERCENT ***** ***** 16.0 23.4 14.6 13.0 15.8 18.6 15.5 20.2 17.2 10.9 ***** CALMS PERCENT OF WIND ***** ***** 32.5 20.9 28.3 28.5 33.6 24.3 32.2 34.8 38.1 41.3 ***** NO. OF WIND OBSERVATION 0 0 163 239 247 239 247 247 239 247 239 247 2354 VECTOR WIND DIRECTION (MEAN) *** *** 266 253 261 279 185 157 256 247 240 244 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** 2.4 5.4 2.8 2.6 1.8 2.3 0.9 4.0 2.6 1.1 **** WIND STEADINESES (MEAN %) ***** ***** 36.4 65.1 43.1 46.4 34.6 37.1 17.3 65.6 55.3 27.5 ***** WIND SPEED (MEAN KNOTS) **** **** 6.6 8.3 6.5 5.6 5.2 6.2 5.2 6.1 4.7 4.0 **** FASTEST WIND DIRECTION *** *** 240 230 220 310 160 150 240 210 220 240 *** FASTEST WIND SPEED (KNOTS) *** *** 40 35 28 20 25 25 30 30 20 25 *** DAY ** ** 11 30 9 8 15 2 20 24 8 17 DAYS WITH SKY CLEAR (0-2)/8 8 13 11 7 18 27 30 21 24 8 13 17 197 DAYS WITH P.CLOUDY (3-6)/8 8 15 17 15 10 3 1 10 4 19 15 8 125 DAYS WITH CLOUDY (7-8)/8 15 0 3 8 3 0 0 0 2 4 2 6 43 DAYS WITH VISIBILITY =< 2 KM 21 4 3 2 1 0 3 2 1 5 0 2 44 DURATION OF SUNSHINE HOURS ****** ****** 141.8 234.5 301.3 364.8 359.2 309.0 288.6 191.1 215.5 191.9 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 822.5 823.2 824.5 822.3 825.1 823.6 820.9 824.6 826.5 827.0 828.3 826.6 824.6 MAX. QFE PRESSURE IN HPA 830.7 830.8 830.7 829.7 832.3 830.0 826.8 829.9 832.1 833.1 832.1 832.6 833.1 DAY-HOUR 31- 6 1- 6 16- 6 25- 6 20- 6 2- 6 16- 3 20- 6 15- 3 4-21 5- 6 31-18 MIN. QFE PRESSURE IN HPA 810.0 811.5 814.9 810.8 818.4 817.7 814.9 817.6 821.3 815.8 823.2 819.6 810.0 DAY-HOUR 11- 0 23- 0 23-15 4- 3 1-21 24-15 28-15 1-15 3-12 25-12 17-12 20- 3 MEAN QNH PRESSURE IN HPA 1007.6 1008.4 1010.0 1007.3 1010.7 1008.9 1005.7 1010.0 1012.3 1012.9 1014.4 1012.4 1010.1 MAX. QNH PRESSURE IN HPA 1017.2 1017.4 1017.2 1016.1 1019.1 1016.4 1012.6 1016.3 1018.9 1020.1 1018.9 1019.5 1020.1 DAY-HOUR 31- 6 1- 6 16- 6 25- 6 20- 6 2- 6 16- 3 20- 6 15- 3 4-21 5- 6 31-18 MIN. QNH PRESSURE IN HPA 992.8 994.6 998.6 993.8 1002.7 1001.9 998.6 1001.8 1006.2 999.7 1008.4 1004.2 992.8 DAY-HOUR 11- 0 23- 0 23-15 4- 3 1-21 24-15 28-15 1-15 3-12 25-12 17-12 20- 3 MEAN QFF PRESSURE IN HPA 1015.9 1012.1 1008.1 1003.5 1001.4 997.0 991.1 995.8 1002.3 1006.8 1011.7 1014.8 1005.0 MAX. QFF PRESSURE IN HPA 1035.2 1028.9 1019.9 1014.5 1011.9 1005.8 997.7 1004.3 1011.7 1017.1 1020.0 1030.4 1035.2 DAY-HOUR 16-18 3-18 16- 3 6- 3 4- 6 2- 6 16- 3 10-15 30- 3 30- 6 29-18 22- 3 MIN. QFF PRESSURE IN HPA 994.8 991.5 995.7 991.8 993.5 988.9 984.0 986.5 993.4 993.1 1001.9 1001.3 984.0 DAY-HOUR 9- 9 23- 0 12-15 19-15 1-21 24- 9 28-15 2-12 3-12 25- 0 17-12 15- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 822.3 823.1 824.5 822.2 825.1 823.9 821.3 824.7 826.6 827.0 828.3 826.4 824.6 MAX. QFE PRESSURE IN HPA 829.6 829.6 829.2 828.4 831.0 828.1 825.2 828.2 831.0 833.0 831.7 831.0 833.0 DAY 31 1 7 25 20 2 16 20 15 5 29 4 MIN. QFE PRESSURE IN HPA 810.0 811.5 817.0 812.0 821.0 818.5 817.0 820.2 823.8 816.7 824.1 820.0 810.0 DAY 11 23 23 4 2 24 11 1 4 25 18 20 MEAN QNH PRESSURE IN HPA 1007.4 1008.2 1009.9 1007.3 1010.6 1009.2 1006.2 1010.1 1012.4 1012.9 1014.4 1012.2 1010.1 MAX. QNH PRESSURE IN HPA 1015.9 1015.9 1015.5 1014.5 1017.6 1014.2 1010.8 1014.3 1017.6 1020.0 1018.4 1017.6 1020.0 DAY 31 1 7 25 20 2 16 20 15 5 29 4 MIN. QNH PRESSURE IN HPA 992.8 994.6 1001.1 995.2 1005.8 1002.9 1001.1 1004.9 1009.1 1000.7 1009.5 1004.6 992.8 DAY 11 23 23 4 2 24 11 1 4 25 18 20 MEAN QFF PRESSURE IN HPA 1014.8 1011.2 1007.7 1003.4 1001.5 997.8 991.9 995.8 1002.1 1006.3 1011.0 1013.5 1004.8 MAX. QFF PRESSURE IN HPA 1030.1 1024.8 1018.8 1012.9 1009.1 1004.1 997.5 1001.0 1009.4 1014.1 1018.4 1028.0 1030.1 DAY 17 4 15 10 5 2 7 10 30 5 29 22 MIN. QFF PRESSURE IN HPA 995.6 991.5 996.7 993.4 997.3 989.2 986.8 987.7 996.7 993.1 1002.3 1001.3 986.8 DAY 9 23 23 4 7 24 29 2 13 25 18 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 822.5 823.3 824.9 822.6 825.6 824.4 821.9 825.3 827.1 827.2 828.5 826.7 825.0 MAX. QFE PRESSURE IN HPA 829.6 829.3 829.4 829.4 831.2 828.6 826.8 829.0 832.1 833.0 831.7 831.0 833.0 DAY 31 1 16 25 20 3 16 20 15 5 29 4 MIN. QFE PRESSURE IN HPA 810.2 813.0 816.9 810.8 820.6 819.1 816.8 821.0 824.2 817.2 824.5 819.6 810.2 DAY 11 23 23 4 2 24 11 1 12 25 9 20 MEAN QNH PRESSURE IN HPA 1007.6 1008.5 1010.4 1007.7 1011.2 1009.8 1006.9 1010.9 1013.0 1013.1 1014.6 1012.5 1010.5 MAX. QNH PRESSURE IN HPA 1015.9 1015.6 1015.7 1015.7 1017.8 1014.8 1012.6 1015.2 1018.9 1020.0 1018.4 1017.6 1020.0 DAY 31 1 16 25 20 3 16 20 15 5 29 4 MIN. QNH PRESSURE IN HPA 993.1 996.4 1001.0 993.8 1005.3 1003.6 1000.9 1005.8 1009.6 1001.3 1009.9 1004.2 993.1 DAY 11 23 23 4 2 24 11 1 12 25 9 20 MEAN QFF PRESSURE IN HPA 1016.9 1012.9 1009.2 1004.5 1002.5 998.1 993.1 997.9 1004.3 1008.0 1013.1 1015.7 1006.4 MAX. QFF PRESSURE IN HPA 1034.1 1026.7 1019.9 1014.5 1009.9 1004.4 997.7 1004.2 1011.7 1016.9 1019.5 1030.4 1034.1 DAY 16 4 16 6 4 2 16 10 30 5 25 22 MIN. QFF PRESSURE IN HPA 997.1 996.2 997.5 992.4 997.4 991.0 987.0 989.8 999.1 995.1 1004.5 1003.2 987.0 DAY 9 23 23 4 7 24 11 2 3 25 18 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 823.3 824.0 825.6 823.1 825.9 824.7 821.9 825.7 827.5 827.7 829.2 827.5 825.5 MAX. QFE PRESSURE IN HPA 830.7 830.8 830.7 829.7 832.3 830.0 826.7 829.9 832.1 833.0 832.1 832.2 833.0 DAY 31 1 16 25 20 2 16 20 15 5 5 22 MIN. QFE PRESSURE IN HPA 810.7 813.7 815.9 813.2 820.0 819.2 816.2 820.9 824.1 818.0 825.0 820.0 810.7 DAY 11 9 23 4 2 24 11 1 12 25 17 20 MEAN QNH PRESSURE IN HPA 1008.6 1009.3 1011.2 1008.3 1011.6 1010.1 1006.9 1011.3 1013.5 1013.7 1015.5 1013.5 1011.1 MAX. QNH PRESSURE IN HPA 1017.2 1017.4 1017.2 1016.1 1019.1 1016.4 1012.5 1016.3 1018.9 1020.0 1018.9 1019.0 1020.0 DAY 31 1 16 25 20 2 16 20 15 5 5 22 MIN. QNH PRESSURE IN HPA 993.7 997.2 999.8 996.6 1004.6 1003.7 1000.2 1005.7 1009.5 1002.3 1010.5 1004.6 993.7 DAY 11 9 23 4 2 24 11 1 12 25 17 20 MEAN QFF PRESSURE IN HPA 1017.4 1013.7 1009.6 1004.3 1002.0 997.8 991.9 996.8 1003.3 1007.8 1012.9 1016.6 1006.2 MAX. QFF PRESSURE IN HPA 1033.9 1028.9 1019.7 1014.2 1011.9 1005.8 997.0 1001.1 1010.2 1017.1 1018.8 1029.7 1033.9 DAY 16 2 16 10 4 2 7 20 30 30 25 22 MIN. QFF PRESSURE IN HPA 996.9 996.9 997.5 995.9 997.2 990.5 986.3 989.8 997.0 996.4 1004.0 1004.7 986.3 DAY 9 9 23 19 30 24 11 2 12 25 17 28 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 822.8 823.6 825.0 822.6 825.4 824.0 821.1 824.9 826.8 827.1 828.5 827.0 824.9 MAX. QFE PRESSURE IN HPA 830.5 830.1 830.0 829.0 831.5 828.1 825.9 829.0 831.1 832.1 831.3 831.3 832.1 DAY 31 1 16 25 20 1 16 20 15 5 28 22 MIN. QFE PRESSURE IN HPA 811.0 813.7 815.5 813.3 820.1 818.8 815.5 820.2 823.3 817.5 823.9 819.8 811.0 DAY 9 9 23 4 2 24 11 1 3 25 17 20 MEAN QNH PRESSURE IN HPA 1008.0 1008.8 1010.5 1007.7 1011.0 1009.3 1006.0 1010.4 1012.6 1013.0 1014.6 1012.9 1010.4 MAX. QNH PRESSURE IN HPA 1017.0 1016.5 1016.4 1015.2 1018.2 1014.2 1011.6 1015.2 1017.7 1018.9 1017.9 1017.9 1018.9 DAY 31 1 16 25 20 1 16 20 15 5 28 22 MIN. QNH PRESSURE IN HPA 994.0 997.2 999.3 996.7 1004.7 1003.2 999.3 1004.9 1008.5 1001.7 1009.2 1004.4 994.0 DAY 9 9 23 4 2 24 11 1 3 25 17 20 MEAN QFF PRESSURE IN HPA 1015.5 1011.8 1008.0 1003.4 1001.3 996.8 990.7 995.3 1001.6 1006.1 1011.3 1015.0 1004.7 MAX. QFF PRESSURE IN HPA 1032.5 1028.2 1019.0 1012.4 1011.6 1002.6 996.5 999.1 1009.7 1014.1 1017.5 1026.9 1032.5 DAY 16 2 16 10 4 2 7 9 29 30 29 22 MIN. QFF PRESSURE IN HPA 994.8 998.4 997.1 992.0 996.7 988.9 985.4 988.1 996.1 994.6 1003.3 1003.2 985.4 DAY 9 9 23 19 30 24 11 2 3 25 17 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 821.9 822.5 823.6 821.4 824.4 822.7 819.7 823.4 825.3 826.1 827.4 825.8 823.7 MAX. QFE PRESSURE IN HPA 829.0 828.8 828.0 827.1 829.8 827.1 824.7 826.4 828.8 830.7 831.0 830.4 831.0 DAY 31 1 16 25 20 1 16 9 15 4 14 31 MIN. QFE PRESSURE IN HPA 811.8 814.4 815.5 813.0 820.0 817.9 815.3 818.8 821.3 815.8 823.2 819.7 811.8 DAY 9 9 23 4 3 24 11 1 3 25 17 20 MEAN QNH PRESSURE IN HPA 1006.8 1007.5 1008.9 1006.3 1009.8 1007.8 1004.3 1008.7 1010.9 1011.8 1013.4 1011.5 1009.0 MAX. QNH PRESSURE IN HPA 1015.2 1015.0 1014.1 1013.0 1016.2 1013.0 1010.2 1012.2 1015.0 1017.2 1017.6 1016.9 1017.6 DAY 31 1 16 25 20 1 16 9 15 4 14 31 MIN. QNH PRESSURE IN HPA 995.0 998.0 999.3 996.4 1004.6 1002.2 999.1 1003.2 1006.2 999.7 1008.4 1004.3 995.0 DAY 9 9 23 4 3 24 11 1 3 25 17 20 MEAN QFF PRESSURE IN HPA 1014.1 1010.3 1006.7 1002.3 1000.5 996.3 989.8 994.4 1000.7 1005.3 1009.8 1012.7 1003.6 MAX. QFF PRESSURE IN HPA 1030.4 1023.6 1015.9 1010.8 1008.5 1002.7 995.6 999.3 1008.5 1012.6 1016.5 1024.6 1030.4 DAY 16 3 16 6 4 1 7 10 29 28 29 22 MIN. QFF PRESSURE IN HPA 995.9 997.7 997.0 992.0 996.6 989.0 984.4 986.5 993.4 993.7 1001.9 1002.3 984.4 DAY 9 9 12 19 30 24 28 2 3 25 17 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 822.2 822.6 823.7 821.5 824.1 822.3 819.4 823.3 825.5 826.4 827.6 826.1 823.7 MAX. QFE PRESSURE IN HPA 829.5 829.4 828.1 826.8 829.5 826.8 824.4 827.7 828.6 832.2 831.1 831.5 832.2 DAY 31 1 5 25 20 1 16 10 15 4 14 31 MIN. QFE PRESSURE IN HPA 812.0 815.3 814.9 811.4 819.7 817.7 814.9 817.6 821.3 816.7 823.9 820.4 811.4 DAY 11 22 23 3 2 24 28 1 3 25 9 24 MEAN QNH PRESSURE IN HPA 1007.3 1007.8 1009.0 1006.4 1009.4 1007.3 1003.9 1008.5 1011.1 1012.2 1013.6 1011.8 1009.0 MAX. QNH PRESSURE IN HPA 1015.8 1015.7 1014.2 1012.6 1015.8 1012.6 1009.8 1013.7 1014.8 1019.0 1017.7 1018.2 1019.0 DAY 31 1 5 25 20 1 16 10 15 4 14 31 MIN. QNH PRESSURE IN HPA 995.2 999.1 998.6 994.5 1004.3 1001.9 998.6 1001.8 1006.2 1000.7 1009.2 1005.1 994.5 DAY 11 22 23 3 2 24 28 1 3 25 9 24 MEAN QFF PRESSURE IN HPA 1016.5 1011.8 1007.6 1003.1 1000.6 995.7 989.9 995.5 1002.4 1007.2 1012.0 1014.9 1004.8 MAX. QFF PRESSURE IN HPA 1035.0 1025.9 1017.4 1011.7 1009.1 1002.4 995.9 1004.3 1009.2 1014.8 1018.7 1027.7 1035.0 DAY 16 3 16 6 4 1 16 10 29 4 29 22 MIN. QFF PRESSURE IN HPA 997.4 999.9 995.7 991.8 995.4 989.6 984.0 987.7 995.1 994.4 1004.6 1005.0 984.0 DAY 9 14 12 19 30 24 28 1 3 24 17 14 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 822.9 823.4 824.5 822.5 825.4 823.4 820.9 824.6 826.8 827.4 828.4 826.8 824.8 MAX. QFE PRESSURE IN HPA 830.4 829.9 829.5 827.8 831.2 827.8 825.8 828.6 831.0 833.0 831.7 832.6 833.0 DAY 16 1 6 25 20 1 15 19 14 4 28 31 MIN. QFE PRESSURE IN HPA 812.7 813.9 816.5 811.7 820.2 817.9 816.7 820.6 823.1 817.6 824.9 821.1 811.7 DAY 10 22 23 3 1 24 11 1 3 24 17 24 MEAN QNH PRESSURE IN HPA 1008.1 1008.7 1009.9 1007.6 1011.0 1008.7 1005.7 1010.1 1012.7 1013.4 1014.5 1012.7 1010.2 MAX. QNH PRESSURE IN HPA 1016.9 1016.3 1015.8 1013.8 1017.8 1013.8 1011.5 1014.8 1017.6 1020.0 1018.4 1019.5 1020.0 DAY 16 1 6 25 20 1 15 19 14 4 28 31 MIN. QNH PRESSURE IN HPA 996.0 997.4 1000.5 994.8 1004.9 1002.2 1000.7 1005.3 1008.3 1001.8 1010.4 1005.9 994.8 DAY 10 22 23 3 1 24 11 1 3 24 17 24 MEAN QFF PRESSURE IN HPA 1016.8 1012.9 1008.3 1003.5 1001.4 996.4 990.7 995.7 1002.6 1007.4 1012.0 1015.8 1005.3 MAX. QFF PRESSURE IN HPA 1035.2 1028.9 1019.2 1013.2 1010.6 1002.8 995.9 1000.5 1011.2 1014.9 1020.0 1027.0 1035.2 DAY 16 3 14 9 4 1 6 10 30 28 29 21 MIN. QFF PRESSURE IN HPA 997.4 997.0 998.9 993.3 997.2 989.6 986.0 988.8 996.9 993.7 1004.3 1004.2 986.0 DAY 9 22 8 3 30 24 11 1 3 24 17 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 822.4 823.1 824.6 822.6 825.4 824.0 821.4 824.9 826.8 827.3 828.5 826.4 824.8 MAX. QFE PRESSURE IN HPA 830.0 829.3 829.4 828.6 831.0 828.2 826.0 828.5 831.0 833.1 832.0 831.2 833.1 DAY 16 1 6 24 20 1 15 9 14 4 28 5 MIN. QFE PRESSURE IN HPA 810.8 812.8 817.2 812.7 818.4 819.0 817.2 820.7 823.5 817.2 824.9 820.4 810.8 DAY 10 22 23 3 1 23 10 1 3 24 17 19 MEAN QNH PRESSURE IN HPA 1007.5 1008.3 1010.1 1007.7 1010.9 1009.3 1006.3 1010.4 1012.6 1013.2 1014.6 1012.2 1010.3 MAX. QNH PRESSURE IN HPA 1016.4 1015.6 1015.7 1014.8 1017.6 1014.3 1011.7 1014.7 1017.6 1020.1 1018.8 1017.8 1020.1 DAY 16 1 6 24 20 1 15 9 14 4 28 5 MIN. QNH PRESSURE IN HPA 993.8 996.1 1001.3 996.0 1002.7 1003.5 1001.3 1005.5 1008.8 1001.3 1010.4 1005.1 993.8 DAY 10 22 23 3 1 23 10 1 3 24 17 19 MEAN QFF PRESSURE IN HPA 1015.1 1011.9 1007.6 1003.5 1001.2 997.0 991.2 995.1 1001.5 1006.4 1011.2 1014.4 1004.7 MAX. QFF PRESSURE IN HPA 1033.7 1026.4 1019.8 1012.3 1010.3 1003.4 996.6 1001.5 1009.1 1014.3 1018.8 1027.0 1033.7 DAY 16 1 14 9 4 1 16 9 29 29 28 21 MIN. QFF PRESSURE IN HPA 997.1 993.9 998.1 993.7 993.5 989.0 986.7 988.3 996.2 993.6 1003.5 1003.5 986.7 DAY 8 22 22 3 1 23 29 1 12 24 17 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.2 3.5 5.6 10.4 16.1 22.6 24.7 25.0 19.8 11.8 5.5 1.2 12.5 MINIMUN AIR TEMPERATURE (C) -3.4 -2.5 -1.0 2.2 7.0 10.5 14.5 13.9 9.9 5.3 -3.0 -4.8 4.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 17 9 10 1 0 0 0 0 0 0 12 19 68 DAYS WITH FREEZING MIN.<= 0 27 23 22 11 0 0 0 0 0 0 25 27 135 TEMPERATURE RECORDS LOWEST(C) -9.0 -7.0 -8.0 -4.0 1.0 6.0 10.0 9.0 5.0 1.0 -12.0 -13.0 -13.0 DAY 14 12 3 6 7 16 6 29 20 29 26 24 MAXIMUM AIR TEMPERATURE (C) 11.0 10.2 12.5 18.2 24.5 32.4 33.9 34.5 29.1 18.7 14.9 8.8 20.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 28 29 31 11 0 0 0 100 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS HIGHEST(C) 16.0 19.0 20.0 25.0 30.0 36.0 38.0 37.0 34.0 26.0 20.0 17.0 38.0 DAY 6 26 9 30 24 10 25 4 7 7 17 8 DIF. BETWEEN (MAX.-MIN.) (C) 14.4 12.7 13.5 16.0 17.5 21.9 19.4 20.6 19.2 13.4 17.9 13.6 16.7 MEAN DAILY TEMP. (MDT) (C) 3.8 3.9 5.8 10.2 15.8 21.5 24.2 24.2 19.5 12.0 5.9 2.0 12.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 28.5 101.0 99.5 18.0 0.0 0.0 0.0 247.0 HEATING DEG. DAYS(BASE 18 0C) 440.5 396.0 379.5 235.0 48.5 0.0 0.0 0.0 13.0 186.0 361.5 495.5 2555.5 DEWPOINT (MEAN C) -3.7 -2.9 -3.2 -0.2 1.5 -3.4 1.7 0.7 -0.7 3.5 -4.8 -6.5 -1.5 MIXING RATIO (G/KG) 3.66 3.85 3.95 4.70 5.31 3.83 5.48 5.11 4.59 6.11 3.37 2.98 4.41 VAPOUR PRESSURE (HPA) 4.84 5.06 5.19 6.18 7.05 5.06 7.23 6.75 6.10 8.11 4.51 3.97 5.84 SATURATION DEF. (HPA) 3.33 3.26 4.53 7.26 12.12 24.53 26.17 27.35 18.97 6.36 5.39 3.11 11.87 RELATIVE HUMIDITY (MEAN %) 65 67 61 53 44 21 25 23 28 62 51 61 47 RELATIVE HUMIDITY (MAX. %) 88 90 88 85 68 37 42 37 45 82 76 80 68 RELATIVE HUMIDITY (MIN. %) 41 42 33 27 24 9 13 11 15 41 26 38 27 RELATIVE HUMIDITY (MEAN% 03UTC) 79 85 80 78 65 33 37 34 40 78 72 72 63 RELATIVE HUMIDITY (MEAN% 09UTC) 51 52 45 37 31 13 17 16 21 52 38 52 35 RELATIVE HUMIDITY (MEAN% 15UTC) 56 55 49 37 27 10 16 13 18 51 42 57 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 37.0 36.0 65.0 15.6 36.4 0.0 1.0 0.0 0.2 60.5 0.0 35.1 286.8 DAYS WITH PRECIPITATION >=10 2 1 3 0 2 0 0 0 0 2 0 1 11 DAYS WITH PRECIPITATION >= 5 2 3 5 1 3 0 0 0 0 4 0 3 21 DAYS WITH PRECIPITATION >= 1 5 7 8 5 4 0 1 0 0 11 0 4 45 DAYS WITH PRECIPITATION 9 10 12 7 4 1 2 0 1 12 0 10 68 GREATEST DAILY PRECIPITATION 16.0 11.0 18.0 6.0 18.0 0.0 1.0 0.0 0.2 22.0 0.0 18.0 22.0 DAY 31 2 19 13 5 ** 9 ** 30 10 ** 26 DAY WITH THUNDER STORM 2 0 0 1 3 0 2 1 0 4 0 1 14 DAYS WITH SNOW OR SLEET 0 2 4 0 0 0 0 0 0 0 0 4 10 DAYS WITH DUST 1 1 2 5 2 5 9 5 6 1 0 1 38 WIND DIRECTION (PREVAILING) 225 225 315 225 270 315 90 90 90 90 135 315 315 PREVAILING WIND SPEED(KNOTS) 9.4 9.4 9.5 12.0 11.1 9.0 10.2 8.5 9.8 6.9 5.5 5.2 7.5 PREVAILING WIND PERCENT 12.6 12.6 16.6 16.7 21.0 16.2 22.4 27.5 18.3 17.8 21.3 21.9 12.2 CALMS PERCENT OF WIND 46.6 43.5 29.6 31.4 30.9 31.0 18.5 26.3 23.8 28.7 31.8 25.1 30.6 NO. OF WIND OBSERVATION 247 223 247 239 162 210 232 236 240 247 239 247 2769 VECTOR WIND DIRECTION (MEAN) 230 217 268 265 273 252 131 128 264 47 107 259 243 VECTOR WIND MAGNITUDE(KNOTS) 0.8 2.1 3.5 3.5 4.1 2.0 2.3 2.4 1.0 1.0 1.2 1.7 1.1 WIND STEADINESES (MEAN %) 20.5 40.4 51.5 47.3 56.9 27.0 28.7 38.7 14.3 22.2 42.9 33.3 18.3 WIND SPEED (MEAN KNOTS) 3.9 5.2 6.8 7.4 7.2 7.4 8.0 6.2 7.0 4.5 2.8 5.1 6.0 FASTEST WIND DIRECTION 240 160 20 250 10 220 90 90 120 340 120 240 220 FASTEST WIND SPEED (KNOTS) 40 30 35 40 40 45 25 25 26 20 24 30 45 DAY 3 1 1 13 5 13 1 5 22 7 23 2 DAYS WITH SKY CLEAR (0-2)/8 11 8 14 7 9 30 29 25 23 15 17 10 198 DAYS WITH P.CLOUDY (3-6)/8 13 12 11 17 11 0 2 6 7 5 11 11 106 DAYS WITH CLOUDY (7-8)/8 7 8 6 6 3 0 0 0 0 11 2 10 53 DAYS WITH VISIBILITY =< 2 KM 3 0 3 3 1 2 0 0 1 3 0 7 23 DURATION OF SUNSHINE HOURS 167.2 172.9 228.9 203.3 188.4 370.9 355.3 330.3 287.0 191.0 237.0 156.2 2888.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 826.9 823.8 823.3 824.1 834.6 827.7 827.7 828.7 832.5 835.1 839.3 832.8 829.7 MAX. QFE PRESSURE IN HPA 833.9 832.3 832.3 831.0 844.2 831.8 833.5 833.2 836.6 840.0 844.7 841.5 844.7 DAY-HOUR 1- 6 12- 6 3- 6 27- 3 25- 3 16- 6 11- 6 17- 6 16- 6 18- 6 23- 6 7- 6 MIN. QFE PRESSURE IN HPA 819.2 814.4 809.2 816.0 822.4 823.5 822.3 821.9 827.3 829.6 832.3 821.1 809.2 DAY-HOUR 30-12 2- 3 19-15 13-15 6-15 26-15 16-15 5-12 13-15 25-12 30-12 18- 3 MEAN QNH PRESSURE IN HPA 1012.7 1009.1 1008.6 1009.5 1021.9 1013.7 1013.7 1014.9 1019.4 1022.4 1027.3 1019.7 1016.1 MAX. QNH PRESSURE IN HPA 1021.0 1019.1 1019.1 1017.6 1033.2 1018.5 1020.5 1020.2 1024.2 1028.2 1033.7 1030.0 1033.7 DAY-HOUR 1- 6 12- 6 3- 6 27- 3 25- 3 16- 6 11- 6 17- 6 16- 6 18- 6 23- 6 7- 6 MIN. QNH PRESSURE IN HPA 1003.7 998.0 991.9 999.9 1007.5 1008.8 1007.3 1006.9 1013.2 1015.9 1019.1 1005.9 991.9 DAY-HOUR 30-12 2- 3 19-15 13-15 6-15 26-15 16-15 5-12 13-15 25-12 30-12 18- 3 MEAN QFF PRESSURE IN HPA 1012.9 1009.0 1007.0 1004.4 1013.2 1000.9 999.3 1000.3 1008.3 1016.6 1026.5 1021.8 1010.0 MAX. QFF PRESSURE IN HPA 1024.3 1018.7 1023.0 1016.1 1024.9 1008.3 1009.6 1006.2 1015.3 1025.2 1036.7 1035.7 1036.7 DAY-HOUR 1- 6 26- 6 2-21 5- 3 18- 6 16- 6 10- 0 18- 3 22- 3 31- 6 23- 3 23- 6 MIN. QFF PRESSURE IN HPA 1000.6 996.4 990.3 994.1 999.4 994.1 991.5 990.9 998.3 1009.3 1016.6 1003.3 990.3 DAY-HOUR 30-12 2- 3 19-15 13-15 3-12 30-12 25-12 5-12 1-12 1-12 16-12 18- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 826.9 823.6 823.1 824.1 834.4 827.9 828.0 829.0 832.7 835.0 839.5 832.8 829.8 MAX. QFE PRESSURE IN HPA 833.4 829.8 831.2 830.3 843.6 831.2 832.8 832.2 836.0 839.4 844.1 840.2 844.1 DAY 1 12 3 27 25 17 11 18 16 10 23 7 MIN. QFE PRESSURE IN HPA 820.2 815.4 811.6 819.3 823.6 825.4 823.9 825.0 830.0 830.5 836.2 822.7 811.6 DAY 27 2 20 9 7 27 17 4 8 26 30 18 MEAN QNH PRESSURE IN HPA 1012.7 1008.9 1008.3 1009.5 1021.6 1014.0 1014.1 1015.2 1019.7 1022.3 1027.6 1019.8 1016.1 MAX. QNH PRESSURE IN HPA 1020.4 1016.2 1017.8 1016.8 1032.4 1017.8 1019.7 1019.0 1023.5 1027.5 1033.0 1028.4 1033.0 DAY 1 12 3 27 25 17 11 18 16 10 23 7 MIN. QNH PRESSURE IN HPA 1004.9 999.2 994.7 1003.8 1008.9 1011.0 1009.2 1010.5 1016.4 1017.0 1023.7 1007.8 994.7 DAY 27 2 20 9 7 27 17 4 8 26 30 18 MEAN QFF PRESSURE IN HPA 1012.0 1008.5 1006.3 1004.4 1013.0 1001.6 1000.1 1000.8 1008.0 1016.0 1025.8 1020.9 1009.8 MAX. QFF PRESSURE IN HPA 1021.4 1016.7 1021.0 1013.0 1024.1 1008.0 1009.6 1005.5 1013.8 1022.5 1033.2 1033.6 1033.6 DAY 1 12 3 5 19 17 10 18 16 23 26 23 MIN. QFF PRESSURE IN HPA 1001.2 996.5 994.4 996.2 1000.7 996.8 992.5 994.1 999.9 1010.7 1019.4 1003.3 992.5 DAY 27 2 20 9 2 30 25 5 1 1 16 18 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 827.1 823.9 823.4 824.4 834.8 828.8 828.6 829.5 833.2 835.4 839.7 833.1 830.1 MAX. QFE PRESSURE IN HPA 833.6 829.8 831.3 831.0 844.2 831.7 833.3 832.9 836.0 839.2 844.1 841.1 844.2 DAY 1 12 3 27 25 17 11 18 16 10 23 7 MIN. QFE PRESSURE IN HPA 822.0 814.4 811.6 819.5 824.0 825.9 823.7 825.0 830.1 830.7 835.1 821.1 811.6 DAY 12 2 20 8 6 27 17 5 13 26 30 18 MEAN QNH PRESSURE IN HPA 1013.0 1009.2 1008.6 1009.8 1022.1 1014.9 1014.8 1015.8 1020.2 1022.7 1027.8 1020.0 1016.6 MAX. QNH PRESSURE IN HPA 1020.7 1016.2 1017.9 1017.6 1033.2 1018.4 1020.3 1019.8 1023.5 1027.3 1033.0 1029.5 1033.2 DAY 1 12 3 27 25 17 11 18 16 10 23 7 MIN. QNH PRESSURE IN HPA 1007.0 998.0 994.7 1004.0 1009.3 1011.6 1009.0 1010.5 1016.5 1017.2 1022.4 1005.9 994.7 DAY 12 2 20 8 6 27 17 5 13 26 30 18 MEAN QFF PRESSURE IN HPA 1013.9 1009.7 1007.7 1005.7 1014.2 1002.3 1000.8 1001.9 1010.1 1017.8 1028.3 1023.2 1011.3 MAX. QFF PRESSURE IN HPA 1023.7 1017.4 1022.2 1016.1 1024.6 1008.3 1008.8 1006.2 1015.3 1024.2 1036.7 1035.1 1036.7 DAY 1 12 3 5 18 17 10 18 22 23 23 24 MIN. QFF PRESSURE IN HPA 1004.2 996.4 995.1 997.9 1002.4 998.2 994.3 995.4 1001.9 1013.1 1022.4 1003.5 994.3 DAY 27 2 20 17 2 30 17 5 1 26 16 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 828.0 824.9 824.0 824.7 834.9 828.8 828.8 829.9 833.8 836.1 840.4 833.5 830.6 MAX. QFE PRESSURE IN HPA 833.9 832.3 832.3 830.8 844.0 831.8 833.5 833.2 836.6 840.0 844.7 841.5 844.7 DAY 1 12 3 27 24 16 11 17 16 18 23 7 MIN. QFE PRESSURE IN HPA 822.8 816.3 812.8 818.7 824.1 826.1 823.5 825.3 830.5 831.2 835.4 822.3 812.8 DAY 30 2 20 13 6 27 17 5 13 26 30 18 MEAN QNH PRESSURE IN HPA 1014.1 1010.4 1009.4 1010.2 1022.1 1015.0 1015.0 1016.3 1020.8 1023.5 1028.7 1020.6 1017.2 MAX. QNH PRESSURE IN HPA 1021.0 1019.1 1019.1 1017.4 1032.9 1018.5 1020.5 1020.2 1024.2 1028.2 1033.7 1030.0 1033.7 DAY 1 12 3 27 24 16 11 17 16 18 23 7 MIN. QNH PRESSURE IN HPA 1007.9 1000.3 996.1 1003.1 1009.5 1011.8 1008.8 1010.9 1017.0 1017.8 1022.8 1007.3 996.1 DAY 30 2 20 13 6 27 17 5 13 26 30 18 MEAN QFF PRESSURE IN HPA 1015.2 1010.6 1007.9 1005.0 1013.7 1001.7 1000.1 1001.6 1009.5 1017.9 1028.3 1023.2 1011.2 MAX. QFF PRESSURE IN HPA 1024.3 1018.7 1022.7 1016.1 1024.9 1008.3 1007.4 1006.0 1015.1 1025.2 1036.4 1035.7 1036.4 DAY 1 26 3 5 18 16 10 17 28 31 27 23 MIN. QFF PRESSURE IN HPA 1007.4 998.8 996.3 998.1 1002.9 997.8 993.9 994.2 1001.6 1013.1 1021.8 1004.1 993.9 DAY 30 2 20 8 2 30 17 5 1 1 17 18 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 827.6 824.5 823.8 824.3 834.5 828.2 828.0 829.2 833.0 835.6 839.6 833.2 830.1 MAX. QFE PRESSURE IN HPA 833.2 830.7 831.7 830.4 843.5 831.1 832.7 832.6 835.9 839.3 844.1 841.1 844.1 DAY 1 12 3 5 18 16 11 17 16 31 23 7 MIN. QFE PRESSURE IN HPA 821.8 816.1 813.3 818.1 824.0 825.9 823.4 824.5 829.4 831.0 834.2 824.3 813.3 DAY 30 2 20 13 6 26 17 5 13 26 30 18 MEAN QNH PRESSURE IN HPA 1013.5 1009.9 1009.1 1009.7 1021.7 1014.3 1014.1 1015.4 1019.9 1023.0 1027.7 1020.2 1016.6 MAX. QNH PRESSURE IN HPA 1020.2 1017.2 1018.4 1016.9 1032.3 1017.7 1019.6 1019.5 1023.4 1027.4 1033.0 1029.5 1033.0 DAY 1 12 3 5 18 16 11 17 16 31 23 7 MIN. QNH PRESSURE IN HPA 1006.8 1000.0 996.7 1002.4 1009.3 1011.6 1008.6 1009.9 1015.7 1017.6 1021.4 1009.7 996.7 DAY 30 2 20 13 6 26 17 5 13 26 30 18 MEAN QFF PRESSURE IN HPA 1013.1 1009.2 1007.3 1004.1 1013.6 1001.2 999.3 1000.4 1008.2 1016.6 1025.9 1021.7 1010.0 MAX. QFF PRESSURE IN HPA 1018.0 1017.9 1020.4 1014.7 1024.4 1007.4 1006.4 1005.4 1014.3 1023.5 1034.3 1034.6 1034.6 DAY 16 12 3 5 18 16 8 18 21 31 27 23 MIN. QFF PRESSURE IN HPA 1004.3 997.5 996.5 996.9 1001.5 997.1 992.9 993.1 1000.1 1011.9 1018.5 1008.2 992.9 DAY 3 2 19 8 3 30 25 5 1 15 16 18 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 825.9 822.8 822.6 823.2 834.2 826.6 826.6 827.4 831.3 834.3 838.2 831.8 828.7 MAX. QFE PRESSURE IN HPA 831.0 828.9 830.0 829.4 842.5 830.2 831.0 830.9 834.5 838.0 842.3 840.0 842.5 DAY 1 12 3 26 18 16 9 17 21 31 23 7 MIN. QFE PRESSURE IN HPA 819.2 814.7 810.1 816.5 822.8 824.1 822.7 821.9 827.6 829.6 832.3 823.4 810.1 DAY 30 2 19 13 6 26 16 5 13 25 30 20 MEAN QNH PRESSURE IN HPA 1011.6 1008.0 1007.7 1008.4 1021.4 1012.4 1012.4 1013.3 1017.9 1021.5 1026.1 1018.6 1014.9 MAX. QNH PRESSURE IN HPA 1017.6 1015.1 1016.4 1015.7 1031.1 1016.7 1017.6 1017.5 1021.7 1025.8 1030.9 1028.2 1031.1 DAY 1 12 3 26 18 16 9 17 21 31 23 7 MIN. QNH PRESSURE IN HPA 1003.7 998.4 993.0 1000.5 1007.9 1009.5 1007.8 1006.9 1013.6 1015.9 1019.1 1008.6 993.0 DAY 30 2 19 13 6 26 16 5 13 25 30 20 MEAN QFF PRESSURE IN HPA 1010.8 1007.5 1005.7 1003.2 1012.2 999.9 998.3 998.9 1006.3 1015.2 1024.4 1019.7 1008.5 MAX. QFF PRESSURE IN HPA 1019.2 1016.2 1016.3 1012.0 1023.3 1007.0 1007.5 1003.0 1011.9 1021.3 1031.8 1033.7 1033.7 DAY 1 12 3 5 18 16 9 18 21 31 25 23 MIN. QFF PRESSURE IN HPA 1000.6 996.4 991.3 996.1 999.4 994.1 991.5 990.9 998.3 1009.3 1016.6 1007.0 990.9 DAY 30 2 19 13 3 30 25 5 1 1 16 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 826.1 823.1 822.7 823.4 834.1 826.2 826.0 827.1 831.4 834.3 838.3 832.1 828.7 MAX. QFE PRESSURE IN HPA 831.2 829.0 829.7 829.3 842.4 829.8 830.5 830.2 834.9 838.4 842.1 840.0 842.4 DAY 1 12 2 26 18 16 9 17 21 22 23 7 MIN. QFE PRESSURE IN HPA 820.1 815.2 809.2 816.0 822.4 823.5 822.3 822.2 827.3 830.2 833.0 823.0 809.2 DAY 26 2 19 13 6 26 16 5 13 15 30 20 MEAN QNH PRESSURE IN HPA 1011.8 1008.2 1007.8 1008.6 1021.3 1011.9 1011.7 1013.0 1018.1 1021.5 1026.2 1018.9 1014.9 MAX. QNH PRESSURE IN HPA 1017.8 1015.2 1016.1 1015.6 1031.0 1016.2 1017.0 1016.7 1022.2 1026.3 1030.7 1028.2 1031.0 DAY 1 12 2 26 18 16 9 17 21 22 23 7 MIN. QNH PRESSURE IN HPA 1004.7 999.0 991.9 999.9 1007.5 1008.8 1007.3 1007.2 1013.2 1016.7 1020.0 1008.2 991.9 DAY 26 2 19 13 6 26 16 5 13 15 30 20 MEAN QFF PRESSURE IN HPA 1012.5 1008.7 1006.8 1004.3 1012.9 999.3 997.6 998.9 1008.0 1016.6 1026.7 1022.0 1009.5 MAX. QFF PRESSURE IN HPA 1020.1 1016.7 1018.9 1012.5 1023.7 1005.8 1006.1 1002.9 1014.2 1022.7 1034.8 1035.0 1035.0 DAY 1 12 2 5 18 16 9 29 21 31 26 23 MIN. QFF PRESSURE IN HPA 1003.0 998.8 990.3 994.1 1001.5 994.2 992.3 992.3 1001.2 1010.7 1020.7 1010.1 990.3 DAY 30 2 19 13 4 30 24 5 1 8 16 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 826.8 823.8 823.6 824.6 834.9 827.5 827.6 828.5 832.4 835.1 839.0 832.9 829.7 MAX. QFE PRESSURE IN HPA 831.8 829.5 830.7 830.8 842.6 830.7 832.4 832.0 835.6 840.0 843.2 841.0 843.2 DAY 1 12 2 26 24 16 10 16 21 22 22 7 MIN. QFE PRESSURE IN HPA 820.9 818.1 810.7 819.7 823.2 824.0 823.5 824.0 828.9 830.6 832.4 825.4 810.7 DAY 26 2 19 13 6 26 16 4 13 15 30 11 MEAN QNH PRESSURE IN HPA 1012.7 1009.1 1008.9 1010.0 1022.2 1013.4 1013.6 1014.7 1019.2 1022.4 1027.0 1019.9 1016.1 MAX. QNH PRESSURE IN HPA 1018.5 1015.8 1017.2 1017.4 1031.3 1017.2 1019.2 1018.8 1023.0 1028.2 1032.0 1029.4 1032.0 DAY 1 12 2 26 24 16 10 16 21 22 22 7 MIN. QNH PRESSURE IN HPA 1005.7 1002.4 993.7 1004.3 1008.4 1009.3 1008.8 1009.3 1015.1 1017.1 1019.2 1011.0 993.7 DAY 26 2 19 13 6 26 16 4 13 15 30 11 MEAN QFF PRESSURE IN HPA 1013.7 1009.2 1007.3 1004.7 1013.2 1000.3 998.8 999.8 1008.1 1016.9 1026.7 1022.5 1010.1 MAX. QFF PRESSURE IN HPA 1021.3 1016.8 1020.7 1013.6 1023.2 1006.4 1006.5 1005.2 1013.8 1023.4 1035.0 1034.8 1035.0 DAY 1 11 2 5 18 16 9 16 21 31 26 23 MIN. QFF PRESSURE IN HPA 1004.9 1000.3 993.1 998.4 1000.5 995.0 993.1 992.4 1001.2 1011.2 1020.2 1009.8 992.4 DAY 26 28 19 7 1 30 16 4 1 2 16 17 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 826.7 823.7 823.6 824.4 835.2 828.0 828.0 829.1 832.7 835.0 839.5 832.9 829.9 MAX. QFE PRESSURE IN HPA 831.7 829.3 832.0 830.7 844.1 831.2 833.0 832.2 836.4 839.0 844.1 840.0 844.1 DAY 1 11 2 26 20 16 10 17 15 9 22 7 MIN. QFE PRESSURE IN HPA 820.2 817.1 811.9 819.0 823.2 825.0 824.3 824.2 829.8 831.2 836.7 825.4 811.9 DAY 26 2 19 8 6 26 24 5 8 1 15 11 MEAN QNH PRESSURE IN HPA 1012.5 1009.0 1008.9 1009.8 1022.5 1014.1 1014.1 1015.3 1019.6 1022.4 1027.6 1019.9 1016.3 MAX. QNH PRESSURE IN HPA 1018.4 1015.6 1018.8 1017.2 1033.0 1017.8 1020.0 1019.0 1024.0 1027.0 1033.0 1028.2 1033.0 DAY 1 11 2 26 20 16 10 17 15 9 22 7 MIN. QNH PRESSURE IN HPA 1004.9 1001.2 995.1 1003.5 1008.4 1010.5 1009.7 1009.6 1016.2 1017.8 1024.3 1011.0 995.1 DAY 26 2 19 8 6 26 24 5 8 1 15 11 MEAN QFF PRESSURE IN HPA 1012.2 1008.4 1006.9 1004.4 1013.2 1001.2 999.5 1000.2 1008.2 1016.0 1025.8 1021.3 1009.8 MAX. QFF PRESSURE IN HPA 1020.3 1016.4 1023.0 1014.1 1024.5 1007.8 1007.3 1005.6 1013.6 1021.3 1034.7 1033.3 1034.7 DAY 1 11 2 5 18 16 7 17 15 22 25 23 MIN. QFF PRESSURE IN HPA 1001.4 999.7 994.2 996.1 999.8 997.3 992.1 992.3 1002.5 1010.5 1019.7 1008.2 992.1 DAY 26 2 19 8 1 26 24 4 8 1 16 17 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.8 -2.4 2.5 8.0 15.1 20.2 25.4 25.5 18.8 11.9 6.0 -0.9 10.4 MINIMUN AIR TEMPERATURE (C) -10.8 -6.6 -4.6 0.4 6.8 9.8 15.5 14.1 7.9 2.4 0.4 -7.5 2.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 25 19 17 6 0 0 0 0 0 1 5 23 96 DAYS WITH FREEZING MIN.<= 0 28 27 27 14 0 1 0 0 0 6 14 26 143 TEMPERATURE RECORDS LOWEST(C) -25.0 -17.0 -10.0 -12.0 2.0 -2.0 9.0 8.0 3.0 -4.0 -12.0 -18.0 -25.0 DAY 9 2 1 2 2 7 6 30 30 24 29 25 MAXIMUM AIR TEMPERATURE (C) 2.8 2.7 10.9 16.3 23.1 29.4 34.9 35.3 29.0 21.1 12.8 6.6 18.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 15 31 31 10 0 0 0 87 DAYS WITH MAXIMUM TEMP. <= 0 10 7 0 0 0 0 0 0 0 0 0 2 19 TEMPERATURE RECORDS HIGHEST(C) 11.0 9.0 17.0 24.0 29.0 35.0 39.0 38.0 36.0 24.0 22.0 13.0 39.0 DAY 16 10 17 21 25 28 14 17 4 1 3 14 DIF. BETWEEN (MAX.-MIN.) (C) 13.6 9.3 15.5 15.9 16.3 19.6 19.4 21.2 21.1 18.7 12.4 14.1 16.5 MEAN DAILY TEMP. (MDT) (C) -4.0 -2.0 3.2 8.3 15.0 19.6 25.2 24.7 18.5 11.7 6.6 -0.4 10.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 27.0 130.5 116.5 7.5 0.0 0.0 0.0 281.5 HEATING DEG. DAYS(BASE 18 0C) 681.5 559.0 432.5 289.5 95.5 23.0 0.0 0.0 23.5 194.0 342.5 571.5 3212.5 DEWPOINT (MEAN C) -10.1 -7.9 -7.6 -3.1 1.9 -2.7 1.8 -0.9 -3.0 -2.2 -1.3 -7.4 -3.6 MIXING RATIO (G/KG) 2.38 2.72 2.71 3.91 5.56 3.94 5.44 4.48 3.88 4.10 4.39 2.85 3.86 VAPOUR PRESSURE (HPA) 3.17 3.60 3.58 5.17 7.36 5.21 7.15 5.91 5.15 5.48 5.85 3.80 5.12 SATURATION DEF. (HPA) 1.74 1.76 4.29 6.36 10.81 20.51 27.62 29.16 18.54 9.55 4.17 2.48 11.42 RELATIVE HUMIDITY (MEAN %) 68 68 51 50 47 24 24 19 26 42 62 63 45 RELATIVE HUMIDITY (MAX. %) 83 85 69 75 74 40 40 32 43 64 81 78 64 RELATIVE HUMIDITY (MIN. %) 49 49 31 28 25 12 13 10 12 23 39 45 28 RELATIVE HUMIDITY (MEAN% 03UTC) 76 75 65 68 69 38 38 31 39 59 76 74 59 RELATIVE HUMIDITY (MEAN% 09UTC) 66 58 40 38 33 16 19 13 18 31 48 55 36 RELATIVE HUMIDITY (MEAN% 15UTC) 61 65 40 39 33 16 14 13 16 30 53 59 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 16.2 47.3 17.0 32.2 51.5 0.0 0.0 0.0 0.0 8.0 31.1 8.0 211.3 DAYS WITH PRECIPITATION >=10 1 1 0 0 2 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 1 3 2 3 3 0 0 0 0 0 3 0 15 DAYS WITH PRECIPITATION >= 1 2 11 5 7 7 0 0 0 0 3 7 4 46 DAYS WITH PRECIPITATION 8 15 6 11 9 0 0 1 1 5 12 5 73 GREATEST DAILY PRECIPITATION 12.0 15.0 7.0 8.6 26.0 0.0 0.0 0.0 0.0 3.0 8.0 3.0 26.0 DAY 4 12 29 30 18 ** ** ** ** 20 25 23 DAY WITH THUNDER STORM 0 0 0 5 5 0 0 0 1 5 1 0 17 DAYS WITH SNOW OR SLEET 3 14 4 0 0 0 0 0 0 0 0 2 23 DAYS WITH DUST 0 0 2 4 9 15 17 8 4 1 0 0 60 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 135 135 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 6.7 9.2 8.7 10.7 8.3 11.2 12.3 12.7 7.7 7.8 6.7 7.0 8.4 PREVAILING WIND PERCENT 20.6 21.5 27.9 27.2 23.5 25.4 28.6 36.3 22.5 23.9 19.7 19.8 21.8 CALMS PERCENT OF WIND 25.5 10.8 7.3 5.0 6.5 10.0 2.4 6.9 10.0 16.6 16.7 18.2 11.3 NO. OF WIND OBSERVATION 247 223 247 239 247 240 248 248 240 247 239 247 2912 VECTOR WIND DIRECTION (MEAN) 245 239 261 262 245 272 125 123 283 275 233 257 245 VECTOR WIND MAGNITUDE(KNOTS) 1.9 3.2 4.7 6.5 2.1 1.9 2.7 5.9 2.7 3.0 1.6 3.5 2.1 WIND STEADINESES (MEAN %) 33.3 34.4 51.6 55.1 21.4 19.2 27.0 60.8 33.3 45.5 23.2 50.7 24.1 WIND SPEED (MEAN KNOTS) 5.7 9.3 9.1 11.8 9.8 9.9 10.0 9.7 8.1 6.6 6.9 6.9 8.7 FASTEST WIND DIRECTION 220 270 230 240 210 250 250 220 230 240 240 260 240 FASTEST WIND SPEED (KNOTS) 35 35 35 38 35 35 25 30 30 40 30 30 40 DAY 20 24 17 20 25 4 19 20 20 12 25 4 DAYS WITH SKY CLEAR (0-2)/8 15 5 11 5 10 27 31 27 25 10 10 13 189 DAYS WITH P.CLOUDY (3-6)/8 10 14 16 17 11 3 0 4 4 17 9 11 116 DAYS WITH CLOUDY (7-8)/8 6 9 4 8 10 0 0 0 1 4 11 7 60 DAYS WITH VISIBILITY =< 2 KM 10 11 3 3 1 2 3 0 0 1 0 1 35 DURATION OF SUNSHINE HOURS 181.1 130.2 219.8 209.8 254.7 347.5 344.3 338.0 292.9 213.0 160.5 165.5 2857.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 833.4 829.5 827.8 828.8 831.9 829.1 825.9 827.2 830.8 836.2 833.8 832.3 830.6 MAX. QFE PRESSURE IN HPA 842.5 838.2 837.7 835.0 838.1 835.2 832.5 831.8 835.8 842.4 839.3 839.2 842.5 DAY-HOUR 13- 6 28- 9 3- 6 7- 6 2- 6 2- 6 15- 6 16- 6 25- 6 15- 6 6- 6 12- 6 MIN. QFE PRESSURE IN HPA 824.3 819.9 819.6 820.3 826.8 820.5 820.0 822.4 825.1 827.5 825.4 818.4 818.4 DAY-HOUR 21- 3 24- 9 24-15 25- 0 28-12 19-15 27-15 18-15 7-12 1-15 24-21 23- 6 MEAN QNH PRESSURE IN HPA 1020.4 1015.8 1013.8 1015.0 1018.7 1015.3 1011.6 1013.1 1017.4 1023.8 1020.9 1019.1 1017.1 MAX. QNH PRESSURE IN HPA 1031.1 1026.1 1025.5 1022.3 1026.0 1022.5 1019.4 1018.5 1023.3 1031.0 1027.4 1027.3 1031.1 DAY-HOUR 13- 6 28- 9 3- 6 7- 6 2- 6 2- 6 15- 6 16- 6 25- 6 15- 6 6- 6 12- 6 MIN. QNH PRESSURE IN HPA 1009.7 1004.5 1004.2 1005.0 1012.6 1005.2 1004.6 1007.5 1010.6 1013.5 1011.0 1002.7 1002.7 DAY-HOUR 21- 3 24- 9 24-15 25- 0 28-12 19-15 27-15 18-15 7-12 1-15 24-21 23- 6 MEAN QFF PRESSURE IN HPA 1027.3 1020.5 1014.8 1011.9 1010.7 1004.0 996.6 998.3 1007.0 1018.2 1019.3 1022.8 1012.6 MAX. QFF PRESSURE IN HPA 1049.4 1036.7 1029.2 1023.1 1022.2 1014.7 1005.1 1006.8 1015.4 1027.9 1030.6 1033.1 1049.4 DAY-HOUR 6-18 3- 6 1- 0 2- 3 2- 3 2- 6 4-21 30- 3 25- 6 15- 6 29- 3 1- 6 MIN. QFF PRESSURE IN HPA 1010.5 1003.7 1003.3 1000.3 1001.0 992.3 990.0 991.9 998.4 1005.3 1009.3 1004.1 990.0 DAY-HOUR 30- 9 24- 9 27- 9 24-18 25- 9 30-15 24-15 5-21 7-12 2-12 24-12 23- 6 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 833.4 829.3 828.0 829.0 832.0 829.7 826.5 827.5 831.2 836.3 833.9 832.4 830.8 MAX. QFE PRESSURE IN HPA 840.8 837.0 836.5 833.6 837.2 834.8 831.8 830.2 835.3 840.6 838.0 838.2 840.8 DAY 13 28 4 7 3 2 23 16 15 29 6 12 MIN. QFE PRESSURE IN HPA 826.5 821.7 820.4 820.3 827.5 825.0 822.7 824.0 827.1 830.5 826.9 822.0 820.3 DAY 21 15 25 25 31 19 27 19 7 1 25 23 MEAN QNH PRESSURE IN HPA 1020.4 1015.5 1014.1 1015.2 1018.8 1016.0 1012.3 1013.5 1017.9 1023.9 1021.0 1019.2 1017.3 MAX. QNH PRESSURE IN HPA 1029.1 1024.7 1024.1 1020.7 1024.9 1022.1 1018.5 1016.7 1022.7 1028.9 1025.8 1026.1 1029.1 DAY 13 28 4 7 3 2 23 16 15 29 6 12 MIN. QNH PRESSURE IN HPA 1012.3 1006.6 1005.1 1005.0 1013.5 1010.5 1007.8 1009.3 1013.0 1017.0 1012.8 1007.0 1005.0 DAY 21 15 25 25 31 19 27 19 7 1 25 23 MEAN QFF PRESSURE IN HPA 1026.5 1019.8 1014.6 1011.8 1010.8 1005.0 997.2 998.6 1007.2 1017.9 1018.6 1022.2 1012.5 MAX. QFF PRESSURE IN HPA 1044.5 1034.2 1029.2 1020.5 1020.2 1014.4 1002.3 1004.2 1013.3 1024.8 1027.1 1030.3 1044.5 DAY 7 3 1 2 2 7 15 30 14 15 29 1 MIN. QFF PRESSURE IN HPA 1012.1 1009.5 1004.9 1000.8 1002.4 995.7 991.3 993.4 1000.8 1008.9 1009.8 1008.6 991.3 DAY 21 24 27 25 31 30 25 19 7 2 25 23 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 833.5 829.5 828.3 829.3 832.3 830.1 826.8 828.1 831.5 836.5 834.1 832.3 831.0 MAX. QFE PRESSURE IN HPA 841.0 837.2 836.2 833.9 838.1 835.0 832.3 831.5 835.5 841.2 838.3 838.8 841.2 DAY 13 28 4 7 3 2 23 16 15 15 6 12 MIN. QFE PRESSURE IN HPA 824.3 821.6 820.8 820.3 827.3 824.7 823.0 824.5 827.2 830.5 827.5 819.6 819.6 DAY 21 24 25 25 31 19 27 19 7 2 25 23 MEAN QNH PRESSURE IN HPA 1020.5 1015.8 1014.4 1015.5 1019.1 1016.5 1012.7 1014.2 1018.2 1024.0 1021.2 1019.2 1017.6 MAX. QNH PRESSURE IN HPA 1029.4 1024.9 1023.7 1021.0 1026.0 1022.3 1019.1 1018.2 1022.9 1029.6 1026.2 1026.8 1029.6 DAY 13 28 4 7 3 2 23 16 15 15 6 12 MIN. QNH PRESSURE IN HPA 1009.7 1006.5 1005.6 1005.0 1013.2 1010.2 1008.2 1009.9 1013.1 1017.0 1013.5 1004.2 1004.2 DAY 21 24 25 25 31 19 27 19 7 2 25 23 MEAN QFF PRESSURE IN HPA 1028.0 1020.9 1016.4 1013.7 1012.1 1006.0 998.3 1000.5 1008.8 1020.0 1020.5 1024.0 1014.1 MAX. QFF PRESSURE IN HPA 1044.3 1035.7 1029.0 1023.1 1022.2 1014.6 1003.2 1006.8 1015.4 1026.9 1030.6 1032.8 1044.3 DAY 7 3 1 2 2 6 15 30 25 15 29 12 MIN. QFF PRESSURE IN HPA 1011.2 1007.4 1005.9 1001.9 1003.7 996.9 993.1 995.1 1002.2 1010.6 1012.3 1005.9 993.1 DAY 21 24 27 25 31 28 25 6 7 2 25 23 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 834.3 830.2 828.8 829.8 832.7 830.1 827.0 828.5 831.9 837.3 834.8 833.1 831.5 MAX. QFE PRESSURE IN HPA 842.5 838.0 837.7 835.0 838.1 835.2 832.5 831.8 835.8 842.4 839.3 839.2 842.5 DAY 13 28 3 7 2 2 15 16 25 15 6 12 MIN. QFE PRESSURE IN HPA 824.3 821.0 821.0 821.3 827.7 824.4 823.2 825.3 827.5 831.0 828.6 818.4 818.4 DAY 21 24 25 25 28 19 27 19 7 2 20 23 MEAN QNH PRESSURE IN HPA 1021.5 1016.6 1015.0 1016.1 1019.6 1016.5 1012.9 1014.6 1018.7 1025.0 1022.1 1020.1 1018.2 MAX. QNH PRESSURE IN HPA 1031.1 1025.8 1025.5 1022.3 1026.0 1022.5 1019.4 1018.5 1023.3 1031.0 1027.4 1027.3 1031.1 DAY 13 28 3 7 2 2 15 16 25 15 6 12 MIN. QNH PRESSURE IN HPA 1009.7 1005.8 1005.8 1006.2 1013.7 1009.8 1008.4 1010.9 1013.5 1017.6 1014.8 1002.7 1002.7 DAY 21 24 25 25 28 19 27 19 7 2 20 23 MEAN QFF PRESSURE IN HPA 1029.3 1021.9 1016.3 1013.0 1011.4 1005.1 997.9 999.6 1008.1 1019.3 1020.8 1024.5 1013.9 MAX. QFF PRESSURE IN HPA 1047.4 1036.7 1029.1 1022.7 1021.2 1014.7 1003.0 1004.7 1015.4 1027.9 1029.7 1033.1 1047.4 DAY 6 3 1 2 2 2 23 30 25 15 29 1 MIN. QFF PRESSURE IN HPA 1010.8 1004.6 1004.8 1002.2 1002.8 996.9 993.9 995.0 1001.3 1009.8 1014.1 1004.1 993.9 DAY 21 24 27 25 28 30 1 5 7 2 23 23 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 833.7 830.1 827.9 829.1 832.2 829.3 826.2 827.6 830.9 836.4 833.9 832.4 830.8 MAX. QFE PRESSURE IN HPA 841.7 838.2 837.6 833.8 837.7 834.2 831.6 831.1 835.0 841.2 838.7 838.4 841.7 DAY 6 28 3 10 2 2 15 16 25 15 6 12 MIN. QFE PRESSURE IN HPA 824.8 819.9 820.6 821.2 827.1 823.0 822.3 824.6 826.7 830.0 828.7 819.2 819.2 DAY 30 24 25 25 28 19 27 19 7 2 23 23 MEAN QNH PRESSURE IN HPA 1020.8 1016.5 1014.0 1015.4 1019.0 1015.6 1011.9 1013.6 1017.5 1024.0 1021.0 1019.2 1017.4 MAX. QNH PRESSURE IN HPA 1030.2 1026.1 1025.4 1020.9 1025.5 1021.4 1018.3 1017.7 1022.3 1029.6 1026.7 1026.3 1030.2 DAY 6 28 3 10 2 2 15 16 25 15 6 12 MIN. QNH PRESSURE IN HPA 1010.3 1004.5 1005.3 1006.0 1013.0 1008.2 1007.3 1010.1 1012.5 1016.4 1014.9 1003.7 1003.7 DAY 30 24 25 25 28 19 27 19 7 2 23 23 MEAN QFF PRESSURE IN HPA 1027.0 1020.8 1013.9 1011.5 1010.1 1003.5 996.7 997.9 1006.2 1017.3 1018.8 1022.0 1012.1 MAX. QFF PRESSURE IN HPA 1045.6 1034.6 1027.3 1020.1 1020.0 1013.3 1004.8 1003.2 1013.7 1025.3 1028.6 1029.3 1045.6 DAY 6 3 3 2 2 2 4 29 25 15 30 27 MIN. QFF PRESSURE IN HPA 1010.5 1003.7 1003.3 1001.1 1001.0 995.5 991.9 994.1 999.3 1007.3 1011.8 1005.5 991.9 DAY 30 24 27 21 25 28 1 6 7 2 23 23 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 832.5 828.6 826.5 827.6 831.1 827.8 824.5 825.8 829.3 835.2 832.8 831.3 829.4 MAX. QFE PRESSURE IN HPA 840.0 836.7 836.6 831.8 836.5 833.0 829.6 829.3 833.4 840.0 837.6 837.3 840.0 DAY 6 27 3 7 2 2 15 16 25 15 6 16 MIN. QFE PRESSURE IN HPA 824.5 821.5 819.6 821.0 826.8 821.3 820.6 822.9 825.1 827.9 826.3 821.0 819.6 DAY 21 14 25 25 28 19 27 18 7 2 24 23 MEAN QNH PRESSURE IN HPA 1019.3 1014.8 1012.3 1013.6 1017.7 1013.9 1009.9 1011.5 1015.6 1022.5 1019.7 1018.0 1015.7 MAX. QNH PRESSURE IN HPA 1028.2 1024.3 1024.2 1018.5 1024.1 1020.0 1015.9 1015.6 1020.4 1028.2 1025.4 1025.0 1028.2 DAY 6 27 3 7 2 2 15 16 25 15 6 16 MIN. QNH PRESSURE IN HPA 1009.9 1006.4 1004.2 1005.8 1012.6 1006.2 1005.3 1008.0 1010.6 1013.9 1012.1 1005.8 1004.2 DAY 21 14 25 25 28 19 27 18 7 2 24 23 MEAN QFF PRESSURE IN HPA 1025.1 1018.9 1012.6 1010.0 1009.6 1002.7 994.7 996.4 1004.9 1016.5 1017.5 1020.8 1010.8 MAX. QFF PRESSURE IN HPA 1045.0 1032.3 1025.3 1017.1 1018.9 1011.6 1000.3 1002.1 1012.0 1023.6 1027.0 1028.7 1045.0 DAY 6 28 3 2 2 6 15 29 25 15 30 27 MIN. QFF PRESSURE IN HPA 1010.8 1008.6 1004.8 1001.1 1002.1 993.2 990.6 992.6 998.4 1005.3 1009.3 1008.3 990.6 DAY 17 14 22 21 31 30 27 19 7 2 24 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 832.7 829.2 826.6 827.6 831.0 827.4 824.0 825.5 829.6 835.2 833.4 831.8 829.5 MAX. QFE PRESSURE IN HPA 840.2 837.0 837.1 831.7 836.6 832.5 830.4 829.3 833.2 840.0 837.7 838.1 840.2 DAY 13 27 3 6 2 2 14 15 14 15 6 11 MIN. QFE PRESSURE IN HPA 826.3 821.5 819.6 820.8 826.9 820.5 820.0 822.4 825.6 827.5 826.3 824.0 819.6 DAY 21 14 24 25 30 19 27 18 7 1 24 23 MEAN QNH PRESSURE IN HPA 1019.6 1015.4 1012.4 1013.6 1017.6 1013.4 1009.4 1011.2 1015.9 1022.6 1020.4 1018.6 1015.8 MAX. QNH PRESSURE IN HPA 1028.4 1024.7 1024.8 1018.4 1024.2 1019.4 1016.9 1015.6 1020.2 1028.2 1025.5 1026.0 1028.4 DAY 13 27 3 6 2 2 14 15 14 15 6 11 MIN. QNH PRESSURE IN HPA 1012.1 1006.4 1004.2 1005.6 1012.8 1005.2 1004.6 1007.5 1011.2 1013.5 1012.1 1009.3 1004.2 DAY 21 14 24 25 30 19 27 18 7 1 24 23 MEAN QFF PRESSURE IN HPA 1027.0 1020.5 1014.4 1011.5 1010.4 1002.8 994.9 997.4 1006.6 1018.4 1019.8 1023.2 1012.2 MAX. QFF PRESSURE IN HPA 1044.2 1032.4 1027.6 1018.9 1019.7 1011.9 1001.7 1003.8 1012.8 1024.8 1030.1 1031.5 1044.2 DAY 6 28 3 6 2 6 14 29 25 15 30 11 MIN. QFF PRESSURE IN HPA 1012.8 1009.5 1005.3 1002.1 1004.1 992.3 990.0 993.0 1000.7 1008.4 1010.5 1009.6 990.0 DAY 17 14 24 25 30 30 24 6 7 2 24 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 833.4 829.7 828.1 829.1 832.0 828.8 825.7 827.1 830.9 836.4 833.9 832.4 830.6 MAX. QFE PRESSURE IN HPA 841.2 837.7 837.4 833.2 837.3 832.9 830.9 830.5 834.7 840.7 838.5 838.5 841.2 DAY 13 27 3 9 2 2 14 15 24 29 6 11 MIN. QFE PRESSURE IN HPA 827.0 822.3 820.6 821.1 827.3 823.5 821.9 823.5 826.5 829.1 825.8 824.1 820.6 DAY 21 14 24 24 30 19 27 18 6 1 24 3 MEAN QNH PRESSURE IN HPA 1020.5 1016.1 1014.2 1015.4 1018.8 1015.0 1011.3 1013.0 1017.4 1024.0 1021.0 1019.2 1017.2 MAX. QNH PRESSURE IN HPA 1029.6 1025.5 1025.1 1020.2 1025.0 1019.8 1017.5 1017.0 1022.0 1029.0 1026.4 1026.4 1029.6 DAY 13 27 3 9 2 2 14 15 24 29 6 11 MIN. QNH PRESSURE IN HPA 1012.9 1007.3 1005.3 1005.9 1013.2 1008.8 1006.9 1008.8 1012.3 1015.4 1011.5 1009.5 1005.3 DAY 21 14 24 24 30 19 27 18 6 1 24 3 MEAN QFF PRESSURE IN HPA 1028.3 1021.3 1015.8 1012.2 1010.6 1003.5 996.4 997.9 1007.0 1018.4 1020.0 1023.6 1012.9 MAX. QFF PRESSURE IN HPA 1049.4 1034.1 1027.5 1021.4 1020.1 1013.4 1001.1 1002.7 1014.1 1024.6 1030.2 1031.6 1049.4 DAY 6 27 3 1 2 6 14 29 25 15 30 27 MIN. QFF PRESSURE IN HPA 1014.1 1009.8 1007.3 1000.3 1003.2 993.3 990.9 992.3 1000.0 1007.3 1011.0 1009.3 990.9 DAY 16 23 25 24 30 30 24 5 6 1 24 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 833.5 829.5 828.2 829.3 832.3 829.3 826.4 827.7 831.4 836.7 833.9 832.4 830.9 MAX. QFE PRESSURE IN HPA 841.4 838.0 837.2 833.6 836.5 834.0 832.2 830.2 835.3 840.7 839.0 838.5 841.4 DAY 13 27 3 6 22 1 22 15 14 29 6 11 MIN. QFE PRESSURE IN HPA 827.4 821.7 820.6 820.7 827.5 824.5 822.2 824.0 827.1 831.1 825.4 824.0 820.6 DAY 20 14 24 24 30 30 27 18 6 3 24 22 MEAN QNH PRESSURE IN HPA 1020.5 1015.8 1014.3 1015.6 1019.1 1015.6 1012.1 1013.7 1018.1 1024.3 1021.0 1019.2 1017.4 MAX. QNH PRESSURE IN HPA 1029.9 1025.8 1024.9 1020.7 1024.1 1021.1 1019.0 1016.7 1022.7 1029.0 1027.0 1026.4 1029.9 DAY 13 27 3 6 22 1 22 15 14 29 6 11 MIN. QNH PRESSURE IN HPA 1013.4 1006.6 1005.3 1005.5 1013.5 1009.9 1007.2 1009.3 1013.0 1017.7 1011.0 1009.3 1005.3 DAY 20 14 24 24 30 30 27 18 6 3 24 22 MEAN QFF PRESSURE IN HPA 1027.1 1020.0 1014.7 1011.9 1010.5 1003.7 997.1 998.0 1007.0 1017.7 1018.6 1022.3 1012.4 MAX. QFF PRESSURE IN HPA 1044.5 1033.4 1026.6 1021.1 1019.4 1014.5 1005.1 1002.9 1012.2 1024.4 1028.0 1029.9 1044.5 DAY 6 2 3 1 1 6 4 29 29 15 28 26 MIN. QFF PRESSURE IN HPA 1013.0 1009.0 1006.1 1001.7 1002.9 993.8 990.5 991.9 999.5 1008.6 1009.7 1009.3 990.5 DAY 18 14 22 24 30 30 24 5 6 1 24 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.3 -6.8 4.4 9.9 14.6 19.6 24.7 23.8 18.9 13.4 6.3 2.3 10.6 MINIMUN AIR TEMPERATURE (C) -8.5 -11.9 -2.2 2.3 6.0 9.5 12.7 11.6 6.6 3.1 1.0 -2.3 2.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 24 24 12 1 0 0 0 0 0 0 0 10 71 DAYS WITH FREEZING MIN.<= 0 28 28 23 11 0 0 0 0 0 3 13 26 132 TEMPERATURE RECORDS LOWEST(C) -22.0 -32.0 -11.0 -4.0 3.0 5.0 8.0 8.0 2.0 0.0 -3.0 -9.0 -32.0 DAY 28 7 24 1 1 6 25 4 25 24 12 21 MAXIMUM AIR TEMPERATURE (C) 3.4 -0.5 11.3 17.0 21.5 28.5 34.0 34.0 29.7 23.1 12.8 8.6 18.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 11 30 31 12 0 0 0 84 DAYS WITH MAXIMUM TEMP. <= 0 10 15 0 0 0 0 0 0 0 0 0 0 25 TEMPERATURE RECORDS HIGHEST(C) 12.0 8.0 21.0 24.0 26.0 36.0 37.0 37.0 35.0 29.0 16.0 13.0 37.0 DAY 13 29 14 16 20 28 4 15 4 3 14 3 DIF. BETWEEN (MAX.-MIN.) (C) 11.9 11.4 13.5 14.7 15.5 19.0 21.3 22.4 23.1 20.0 11.8 10.9 16.3 MEAN DAILY TEMP. (MDT) (C) -2.5 -6.2 4.6 9.7 13.8 19.0 23.4 22.8 18.1 13.1 6.9 3.2 10.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 11.5 74.5 58.5 3.0 0.0 0.0 0.0 147.5 HEATING DEG. DAYS(BASE 18 0C) 636.5 702.0 416.5 249.5 94.0 17.0 0.0 0.0 21.0 152.5 332.5 459.0 3080.5 DEWPOINT (MEAN C) -9.2 -10.5 -4.4 0.7 6.1 6.6 4.3 2.7 0.1 -0.3 2.6 -2.3 -0.3 MIXING RATIO (G/KG) 2.48 2.30 3.53 5.03 7.34 7.58 6.58 5.77 4.76 4.64 5.61 3.98 4.96 VAPOUR PRESSURE (HPA) 3.29 3.05 4.68 6.66 9.70 9.97 8.66 7.60 6.32 6.18 7.46 5.29 6.57 SATURATION DEF. (HPA) 2.00 1.20 4.30 6.25 7.68 14.55 24.67 24.33 17.87 10.77 2.41 2.17 9.85 RELATIVE HUMIDITY (MEAN %) 65 72 57 59 62 47 30 27 31 44 79 73 54 RELATIVE HUMIDITY (MAX. %) 79 82 80 85 87 73 49 45 49 64 93 88 73 RELATIVE HUMIDITY (MIN. %) 47 56 36 34 38 26 18 16 17 27 57 53 35 RELATIVE HUMIDITY (MEAN% 03UTC) 71 74 73 79 83 72 46 44 47 60 91 84 69 RELATIVE HUMIDITY (MEAN% 09UTC) 61 69 47 43 46 32 21 21 21 33 68 62 44 RELATIVE HUMIDITY (MEAN% 15UTC) 63 69 45 46 49 31 21 17 20 35 72 71 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 29.4 85.0 43.0 80.6 126.4 4.5 0.0 0.0 0.0 24.1 82.7 42.0 517.7 DAYS WITH PRECIPITATION >=10 0 4 1 2 5 0 0 0 0 1 3 1 17 DAYS WITH PRECIPITATION >= 5 2 5 2 7 9 0 0 0 0 1 4 4 34 DAYS WITH PRECIPITATION >= 1 9 10 9 15 14 2 0 0 0 4 13 10 86 DAYS WITH PRECIPITATION 10 11 11 15 18 4 0 0 1 5 13 11 99 GREATEST DAILY PRECIPITATION 8.0 27.0 15.0 18.0 29.0 3.0 0.0 0.0 0.0 18.0 28.0 12.0 29.0 DAY 7 21 11 3 14 23 ** ** ** 27 16 9 DAY WITH THUNDER STORM 0 0 2 2 10 4 0 0 0 2 3 0 23 DAYS WITH SNOW OR SLEET 8 11 4 0 0 0 0 0 0 0 0 2 25 DAYS WITH DUST 3 1 8 1 7 7 12 10 5 6 2 0 62 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 135 135 315 315 315 225 315 PREVAILING WIND SPEED(KNOTS) 7.0 9.9 9.1 9.9 8.4 8.4 10.5 9.6 8.0 6.8 7.3 12.9 8.1 PREVAILING WIND PERCENT 21.0 23.8 22.6 24.3 19.8 31.7 23.0 19.0 24.7 18.1 21.7 18.1 21.7 CALMS PERCENT OF WIND 13.3 41.1 8.5 10.0 15.8 11.3 10.5 11.3 15.5 19.4 19.2 13.3 15.6 NO. OF WIND OBSERVATION 248 231 248 239 247 240 248 247 239 248 240 248 2923 VECTOR WIND DIRECTION (MEAN) 238 310 240 269 281 302 101 178 283 271 282 244 259 VECTOR WIND MAGNITUDE(KNOTS) 4.7 1.5 4.3 1.5 1.1 3.6 2.7 1.2 2.5 1.7 0.9 2.6 1.6 WIND STEADINESES (MEAN %) 52.8 28.8 37.1 17.0 16.4 46.2 31.8 16.2 35.7 27.9 16.1 33.3 21.1 WIND SPEED (MEAN KNOTS) 8.9 5.2 11.6 8.8 6.7 7.8 8.5 7.4 7.0 6.1 5.6 7.8 7.6 FASTEST WIND DIRECTION 220 90 220 180 220 350 150 90 280 240 270 220 220 FASTEST WIND SPEED (KNOTS) 40 28 45 40 30 35 22 25 28 22 23 30 45 DAY 10 2 14 2 22 1 10 18 13 25 13 15 DAYS WITH SKY CLEAR (0-2)/8 11 6 10 2 2 21 25 28 29 15 6 7 162 DAYS WITH P.CLOUDY (3-6)/8 12 10 14 14 17 9 3 3 1 13 13 13 122 DAYS WITH CLOUDY (7-8)/8 8 13 7 14 12 0 3 0 0 3 10 11 81 DAYS WITH VISIBILITY =< 2 KM 7 15 9 2 3 0 0 1 2 1 5 2 47 DURATION OF SUNSHINE HOURS 157.9 117.4 216.7 174.4 228.4 360.4 346.1 339.7 323.5 230.6 152.0 142.6 2789.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 829.3 831.7 829.9 831.3 832.7 829.1 828.6 828.3 832.8 835.3 835.7 832.0 831.4 MAX. QFE PRESSURE IN HPA 837.7 838.7 838.3 835.7 837.6 836.1 833.7 833.7 837.8 842.4 841.4 840.1 842.4 DAY-HOUR 19- 9 5- 6 27- 6 13- 3 3- 6 1-18 20- 6 30- 6 20- 6 16- 6 24- 6 20- 6 MIN. QFE PRESSURE IN HPA 819.3 818.0 820.0 820.2 827.3 822.4 821.5 823.7 827.6 828.3 830.5 825.2 818.0 DAY-HOUR 15-15 3- 0 10-12 24-12 30-15 22-15 10-12 2-15 6-12 25-12 1-15 15-12 MEAN QNH PRESSURE IN HPA 1015.6 1018.4 1016.2 1017.9 1019.6 1015.4 1014.7 1014.4 1019.7 1022.7 1023.1 1018.8 1018.0 MAX. QNH PRESSURE IN HPA 1025.5 1026.7 1026.2 1023.1 1025.4 1023.6 1020.8 1020.8 1025.6 1031.0 1029.9 1028.3 1031.0 DAY-HOUR 19- 9 5- 6 27- 6 13- 3 3- 6 1-18 20- 6 30- 6 20- 6 16- 6 24- 6 20- 6 MIN. QNH PRESSURE IN HPA 1003.8 1002.3 1004.6 1004.9 1013.2 1007.5 1006.4 1009.0 1013.6 1014.4 1017.0 1010.8 1002.3 DAY-HOUR 15-15 3- 0 10-12 24-12 30-15 22-15 10-12 2-15 6-12 25-12 1-15 15-12 MEAN QFF PRESSURE IN HPA 1021.0 1025.6 1015.8 1013.5 1011.7 1004.0 1000.2 1000.5 1009.2 1016.0 1021.2 1019.9 1013.2 MAX. QFF PRESSURE IN HPA 1040.6 1047.8 1030.5 1023.0 1019.0 1016.6 1009.0 1009.2 1018.3 1024.2 1031.3 1032.8 1047.8 DAY-HOUR 19-18 6- 9 23-18 4- 9 3- 3 2- 3 20- 3 31- 3 20- 3 30- 6 24- 6 20- 6 MIN. QFF PRESSURE IN HPA 1003.1 1007.1 1000.7 999.8 1004.3 996.1 989.9 994.2 1000.8 1005.9 1013.3 1009.7 989.9 DAY-HOUR 15-15 3- 0 14- 9 23-12 30-12 30-15 10-12 6-12 5-12 4- 9 1-12 15-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 829.5 831.5 829.9 831.0 832.9 829.5 828.8 828.6 833.0 835.4 835.6 832.2 831.5 MAX. QFE PRESSURE IN HPA 837.0 838.0 837.0 835.2 837.0 835.1 833.2 832.3 837.0 841.2 840.0 839.2 841.2 DAY 20 5 27 13 3 2 20 29 19 16 24 20 MIN. QFE PRESSURE IN HPA 821.7 818.0 821.0 821.4 829.2 825.8 822.8 825.8 829.3 829.7 831.0 826.5 818.0 DAY 16 3 10 24 30 23 11 3 6 25 1 5 MEAN QNH PRESSURE IN HPA 1015.9 1018.1 1016.3 1017.6 1019.8 1015.8 1015.0 1014.8 1019.9 1022.8 1023.0 1019.0 1018.2 MAX. QNH PRESSURE IN HPA 1024.7 1025.8 1024.7 1022.5 1024.7 1022.4 1020.2 1019.1 1024.7 1029.6 1028.2 1027.3 1029.6 DAY 20 5 27 13 3 2 20 29 19 16 24 20 MIN. QNH PRESSURE IN HPA 1006.6 1002.3 1005.8 1006.3 1015.5 1011.5 1007.9 1011.5 1015.6 1016.1 1017.6 1012.3 1002.3 DAY 16 3 10 24 30 23 11 3 6 25 1 5 MEAN QFF PRESSURE IN HPA 1020.4 1024.5 1015.4 1012.9 1011.9 1004.5 1000.8 1000.7 1009.3 1015.5 1020.4 1019.2 1013.0 MAX. QFF PRESSURE IN HPA 1037.6 1039.4 1027.9 1021.7 1018.4 1013.2 1007.6 1007.1 1016.3 1022.0 1027.2 1029.8 1039.4 DAY 20 8 24 5 3 2 20 31 20 17 25 20 MIN. QFF PRESSURE IN HPA 1008.8 1007.1 1003.3 1002.1 1007.8 998.8 990.9 996.1 1003.4 1007.4 1013.4 1010.5 990.9 DAY 7 3 10 24 25 29 10 10 5 4 1 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 829.6 831.5 830.1 831.5 833.0 829.9 829.4 829.1 833.4 835.7 835.7 832.0 831.7 MAX. QFE PRESSURE IN HPA 836.5 838.0 837.5 835.7 837.4 835.9 833.4 833.1 837.0 841.7 840.5 839.2 841.7 DAY 19 6 27 13 3 2 20 30 19 16 24 20 MIN. QFE PRESSURE IN HPA 821.8 819.9 821.0 821.3 829.1 825.9 823.0 826.3 829.6 828.9 830.9 826.3 819.9 DAY 16 3 10 24 30 23 10 13 6 25 1 5 MEAN QNH PRESSURE IN HPA 1015.9 1018.2 1016.5 1018.2 1020.0 1016.2 1015.7 1015.4 1020.5 1023.2 1023.2 1018.8 1018.5 MAX. QNH PRESSURE IN HPA 1024.1 1025.8 1025.3 1023.1 1025.1 1023.4 1020.4 1020.1 1024.7 1030.2 1028.8 1027.3 1030.2 DAY 19 6 27 13 3 2 20 30 19 16 24 20 MIN. QNH PRESSURE IN HPA 1006.8 1004.5 1005.8 1006.2 1015.4 1011.6 1008.2 1012.1 1015.9 1015.1 1017.5 1012.1 1004.5 DAY 16 3 10 24 30 23 10 13 6 25 1 5 MEAN QFF PRESSURE IN HPA 1021.9 1025.6 1016.8 1014.6 1013.0 1005.7 1002.1 1002.8 1011.6 1018.1 1022.3 1020.8 1014.6 MAX. QFF PRESSURE IN HPA 1039.1 1039.7 1028.4 1021.8 1019.0 1016.6 1009.0 1009.2 1018.3 1024.0 1030.0 1032.0 1039.7 DAY 20 5 24 5 3 2 20 31 20 17 24 21 MIN. QFF PRESSURE IN HPA 1009.7 1009.8 1003.7 1003.2 1008.0 1000.0 992.1 997.6 1005.6 1009.4 1015.2 1011.8 992.1 DAY 7 3 10 24 25 30 10 10 5 4 1 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 830.1 832.4 830.9 832.2 833.5 830.1 829.8 829.5 834.1 836.6 836.7 833.1 832.4 MAX. QFE PRESSURE IN HPA 837.2 838.7 838.3 835.7 837.6 836.1 833.7 833.7 837.8 842.4 841.4 840.1 842.4 DAY 19 5 27 13 3 2 20 30 20 16 24 20 MIN. QFE PRESSURE IN HPA 821.4 821.2 821.3 822.6 829.1 825.9 823.8 826.5 829.8 829.8 831.4 826.8 821.2 DAY 16 3 10 24 30 14 11 12 6 25 1 15 MEAN QNH PRESSURE IN HPA 1016.5 1019.3 1017.5 1019.0 1020.6 1016.5 1016.1 1015.8 1021.3 1024.2 1024.4 1020.1 1019.3 MAX. QNH PRESSURE IN HPA 1024.9 1026.7 1026.2 1023.1 1025.4 1023.6 1020.8 1020.8 1025.6 1031.0 1029.9 1028.3 1031.0 DAY 19 5 27 13 3 2 20 30 20 16 24 20 MIN. QNH PRESSURE IN HPA 1006.3 1006.0 1006.2 1007.7 1015.4 1011.6 1009.1 1012.3 1016.2 1016.2 1018.1 1012.6 1006.0 DAY 16 3 10 24 30 14 11 12 6 25 1 15 MEAN QFF PRESSURE IN HPA 1022.9 1027.0 1017.5 1014.6 1012.5 1004.9 1001.1 1001.5 1010.4 1017.2 1023.0 1021.7 1014.5 MAX. QFF PRESSURE IN HPA 1039.7 1043.8 1029.5 1022.5 1017.4 1015.1 1007.8 1008.9 1016.2 1024.2 1031.3 1032.8 1043.8 DAY 20 5 24 4 3 2 13 31 19 30 24 20 MIN. QFF PRESSURE IN HPA 1009.6 1010.9 1002.6 1004.7 1007.3 999.5 992.9 997.4 1004.2 1007.8 1015.2 1011.4 992.9 DAY 15 3 14 24 30 14 10 13 6 4 1 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 829.6 832.2 830.3 831.6 832.8 829.3 829.0 828.6 833.2 835.7 836.0 832.2 831.7 MAX. QFE PRESSURE IN HPA 837.7 838.6 837.7 835.0 836.4 835.3 833.0 832.5 836.9 841.9 840.7 838.6 841.9 DAY 19 5 26 11 3 2 20 27 20 16 24 20 MIN. QFE PRESSURE IN HPA 820.9 823.0 821.5 821.5 828.1 825.0 822.8 825.6 828.6 829.0 831.4 826.0 820.9 DAY 10 3 10 24 30 22 10 2 6 25 1 15 MEAN QNH PRESSURE IN HPA 1016.0 1019.0 1016.7 1018.3 1019.8 1015.6 1015.3 1014.8 1020.2 1023.1 1023.5 1019.0 1018.4 MAX. QNH PRESSURE IN HPA 1025.5 1026.6 1025.5 1022.3 1024.0 1022.7 1020.0 1019.4 1024.6 1030.4 1029.0 1026.6 1030.4 DAY 19 5 26 11 3 2 20 27 20 16 24 20 MIN. QNH PRESSURE IN HPA 1005.7 1008.2 1006.4 1006.4 1014.2 1010.5 1007.9 1011.2 1014.8 1015.2 1018.1 1011.7 1005.7 DAY 10 3 10 24 30 22 10 2 6 25 1 15 MEAN QFF PRESSURE IN HPA 1020.6 1026.2 1015.7 1013.3 1011.2 1003.8 1000.2 1000.4 1008.8 1015.5 1020.9 1019.3 1013.0 MAX. QFF PRESSURE IN HPA 1038.0 1047.8 1028.2 1023.0 1015.7 1013.7 1006.1 1006.9 1014.8 1022.9 1028.1 1029.5 1047.8 DAY 19 6 26 4 3 2 20 31 19 30 24 20 MIN. QFF PRESSURE IN HPA 1006.5 1012.0 1000.7 1003.2 1005.8 997.8 990.9 996.1 1002.8 1005.9 1015.4 1009.7 990.9 DAY 15 2 14 24 30 29 10 7 6 4 1 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 828.5 831.2 828.8 830.3 831.8 828.1 827.6 827.1 831.6 834.3 834.8 831.2 830.4 MAX. QFE PRESSURE IN HPA 836.6 837.2 836.7 834.1 835.1 834.1 831.4 831.2 835.0 840.5 839.5 838.2 840.5 DAY 19 5 26 11 3 2 20 27 19 16 24 20 MIN. QFE PRESSURE IN HPA 820.3 820.2 820.0 820.2 827.4 822.9 821.5 824.0 827.6 828.3 830.6 825.2 820.0 DAY 22 2 10 24 30 22 10 6 6 25 1 15 MEAN QNH PRESSURE IN HPA 1014.6 1017.8 1015.0 1016.8 1018.5 1014.2 1013.6 1013.0 1018.3 1021.5 1022.1 1017.8 1016.9 MAX. QNH PRESSURE IN HPA 1024.2 1024.9 1024.3 1021.3 1022.4 1021.3 1018.1 1017.8 1022.3 1028.8 1027.6 1026.1 1028.8 DAY 19 5 26 11 3 2 20 27 19 16 24 20 MIN. QNH PRESSURE IN HPA 1005.0 1004.9 1004.6 1004.9 1013.4 1008.0 1006.4 1009.3 1013.6 1014.4 1017.1 1010.8 1004.6 DAY 22 2 10 24 30 22 10 6 6 25 1 15 MEAN QFF PRESSURE IN HPA 1019.1 1024.0 1014.0 1012.0 1010.4 1002.8 999.1 998.7 1007.5 1014.2 1019.4 1017.9 1011.6 MAX. QFF PRESSURE IN HPA 1036.2 1038.5 1026.8 1022.1 1015.7 1012.2 1005.1 1004.9 1013.0 1021.5 1026.7 1028.2 1038.5 DAY 19 5 26 4 3 2 20 31 20 16 24 20 MIN. QFF PRESSURE IN HPA 1004.1 1008.4 1000.9 999.8 1004.3 996.4 989.9 994.2 1000.8 1006.7 1013.3 1009.7 989.9 DAY 15 2 14 23 30 22 10 6 5 4 1 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 828.9 831.3 829.0 830.4 831.7 827.8 827.1 826.7 831.5 834.3 835.0 831.6 830.4 MAX. QFE PRESSURE IN HPA 836.8 837.1 836.6 833.9 834.4 834.7 831.0 830.9 835.1 840.2 839.5 838.6 840.2 DAY 19 5 26 12 3 1 26 30 18 16 24 20 MIN. QFE PRESSURE IN HPA 819.3 819.8 820.7 820.8 827.3 822.4 821.5 823.7 828.1 828.5 830.5 825.5 819.3 DAY 15 2 9 24 30 22 10 2 7 26 1 15 MEAN QNH PRESSURE IN HPA 1015.1 1018.0 1015.2 1016.9 1018.5 1013.8 1013.0 1012.5 1018.2 1021.4 1022.3 1018.3 1016.9 MAX. QNH PRESSURE IN HPA 1024.4 1024.8 1024.2 1021.0 1021.6 1022.0 1017.6 1017.5 1022.4 1028.4 1027.6 1026.6 1028.4 DAY 19 5 26 12 3 1 26 30 18 16 24 20 MIN. QNH PRESSURE IN HPA 1003.8 1004.4 1005.5 1005.6 1013.2 1007.5 1006.4 1009.0 1014.2 1014.7 1017.0 1011.1 1003.8 DAY 15 2 9 24 30 22 10 2 7 26 1 15 MEAN QFF PRESSURE IN HPA 1021.0 1025.3 1015.3 1013.3 1011.3 1003.1 999.2 999.8 1009.2 1016.3 1021.3 1020.2 1012.9 MAX. QFF PRESSURE IN HPA 1039.0 1039.2 1026.7 1021.2 1015.9 1014.4 1005.2 1006.6 1015.2 1023.4 1028.2 1031.4 1039.2 DAY 19 5 26 4 1 1 20 30 20 30 24 21 MIN. QFF PRESSURE IN HPA 1003.1 1008.3 1001.9 1002.1 1004.5 996.1 990.7 994.5 1002.5 1009.7 1014.5 1010.3 990.7 DAY 15 2 14 23 30 30 10 10 5 25 1 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 829.3 831.8 830.0 831.6 833.1 828.9 828.2 828.1 832.5 835.3 835.7 832.0 831.4 MAX. QFE PRESSURE IN HPA 837.3 837.7 837.7 835.4 836.5 836.1 833.2 832.5 836.2 841.1 840.0 838.5 841.1 DAY 19 5 26 12 2 1 19 29 19 16 24 20 MIN. QFE PRESSURE IN HPA 821.8 819.2 821.5 822.3 829.3 824.5 821.8 824.8 828.8 829.6 831.6 826.0 819.2 DAY 15 2 9 24 30 23 10 2 7 25 1 15 MEAN QNH PRESSURE IN HPA 1015.6 1018.6 1016.4 1018.3 1020.1 1015.2 1014.3 1014.2 1019.4 1022.6 1023.1 1018.8 1018.0 MAX. QNH PRESSURE IN HPA 1025.0 1025.5 1025.5 1022.8 1024.1 1023.6 1020.2 1019.4 1023.7 1029.5 1028.2 1026.4 1029.5 DAY 19 5 26 12 2 1 19 29 19 16 24 20 MIN. QNH PRESSURE IN HPA 1006.8 1003.7 1006.4 1007.3 1015.6 1009.9 1006.8 1010.3 1015.0 1015.9 1018.3 1011.7 1003.7 DAY 15 2 9 24 30 23 10 2 7 25 1 15 MEAN QFF PRESSURE IN HPA 1021.9 1026.4 1016.3 1013.8 1012.0 1003.6 999.4 1000.0 1008.7 1015.7 1021.8 1020.5 1013.3 MAX. QFF PRESSURE IN HPA 1040.6 1046.9 1030.5 1022.3 1016.4 1014.2 1006.3 1007.6 1014.2 1022.7 1027.9 1031.5 1046.9 DAY 19 5 23 4 2 1 19 30 19 16 24 20 MIN. QFF PRESSURE IN HPA 1007.7 1007.6 1004.7 1004.1 1006.2 997.5 991.7 995.7 1003.0 1007.9 1016.1 1011.0 991.7 DAY 15 2 14 23 30 30 10 6 5 3 1 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 829.3 831.7 830.1 831.7 833.2 829.4 828.9 828.6 833.0 835.5 835.8 832.0 831.6 MAX. QFE PRESSURE IN HPA 837.7 838.1 837.5 835.6 837.2 835.7 833.2 832.3 837.0 841.0 839.7 838.4 841.0 DAY 19 5 26 12 2 1 19 24 18 16 24 19 MIN. QFE PRESSURE IN HPA 821.3 818.2 821.5 822.3 829.9 824.8 822.9 825.5 829.2 830.2 831.8 826.1 818.2 DAY 15 2 9 23 15 23 9 12 7 25 1 26 MEAN QNH PRESSURE IN HPA 1015.6 1018.4 1016.5 1018.4 1020.2 1015.7 1015.1 1014.8 1019.9 1022.8 1023.3 1018.8 1018.3 MAX. QNH PRESSURE IN HPA 1025.5 1026.0 1025.3 1023.0 1024.9 1023.1 1020.2 1019.1 1024.7 1029.4 1027.8 1026.3 1029.4 DAY 19 5 26 12 2 1 19 24 18 16 24 19 MIN. QNH PRESSURE IN HPA 1006.2 1002.5 1006.4 1007.3 1016.3 1010.3 1008.0 1011.1 1015.5 1016.7 1018.5 1011.8 1002.5 DAY 15 2 9 23 15 23 9 12 7 25 1 26 MEAN QFF PRESSURE IN HPA 1020.5 1025.8 1015.5 1013.5 1011.7 1003.9 1000.2 1000.5 1008.6 1015.3 1020.9 1019.3 1013.0 MAX. QFF PRESSURE IN HPA 1038.5 1044.3 1029.8 1021.7 1016.8 1013.6 1006.7 1006.3 1014.9 1021.9 1027.0 1029.2 1044.3 DAY 19 5 23 4 2 1 19 30 18 30 23 19 MIN. QFF PRESSURE IN HPA 1007.7 1007.4 1002.8 1004.0 1006.8 997.8 990.8 996.3 1003.1 1007.3 1016.4 1010.2 990.8 DAY 15 2 9 23 20 30 9 6 6 3 1 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.8 -6.5 7.8 9.7 16.0 21.3 24.6 23.8 18.3 13.9 3.5 2.0 10.7 MINIMUN AIR TEMPERATURE (C) -9.2 -12.0 3.0 3.4 7.8 9.8 12.6 12.6 7.6 5.5 -3.8 -4.7 2.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 22 23 0 1 0 0 0 0 0 0 16 19 81 DAYS WITH FREEZING MIN.<= 0 31 27 6 6 0 0 0 0 0 1 25 26 122 TEMPERATURE RECORDS LOWEST(C) -24.0 -33.0 -2.0 -4.0 2.0 5.0 7.0 7.0 4.0 -3.0 -11.0 -11.0 -33.0 DAY 28 5 24 15 9 2 2 30 13 31 18 9 MAXIMUM AIR TEMPERATURE (C) -0.9 -0.5 13.6 16.3 23.6 30.8 34.8 33.1 28.1 22.6 12.3 10.1 18.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 24 29 26 9 1 0 0 91 DAYS WITH MAXIMUM TEMP. <= 0 17 13 0 0 0 0 0 0 0 0 0 0 30 TEMPERATURE RECORDS HIGHEST(C) 7.0 11.0 22.0 24.0 30.0 35.0 39.0 38.0 34.0 30.0 16.0 16.0 39.0 DAY 3 28 31 25 26 29 27 4 9 5 6 5 DIF. BETWEEN (MAX.-MIN.) (C) 8.3 11.5 10.6 12.9 15.8 21.0 22.2 20.5 20.5 17.1 16.1 14.8 16.0 MEAN DAILY TEMP. (MDT) (C) -5.0 -6.3 8.3 9.9 15.7 20.3 23.7 22.9 17.8 14.0 4.3 2.7 10.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 10.0 87.5 73.0 2.0 0.0 0.0 0.0 172.5 HEATING DEG. DAYS(BASE 18 0C) 714.5 679.0 301.0 244.0 78.5 5.5 0.0 3.5 29.0 123.5 412.5 474.0 3065.0 DEWPOINT (MEAN C) -8.6 -9.6 1.6 2.3 5.5 5.7 7.2 6.2 3.1 4.1 -3.0 -3.7 0.9 MIXING RATIO (G/KG) 2.62 2.67 5.30 5.64 6.95 7.08 8.00 7.37 5.91 6.34 3.92 3.63 5.45 VAPOUR PRESSURE (HPA) 3.47 3.55 7.00 7.45 9.19 9.34 10.50 9.71 7.83 8.40 5.22 4.84 7.21 SATURATION DEF. (HPA) 0.85 0.85 4.03 5.43 10.06 18.06 23.17 22.04 15.05 8.80 3.20 2.72 9.52 RELATIVE HUMIDITY (MEAN %) 82 80 68 64 54 39 35 35 39 56 65 68 57 RELATIVE HUMIDITY (MAX. %) 91 90 86 86 80 63 54 52 57 74 84 85 75 RELATIVE HUMIDITY (MIN. %) 69 65 50 42 32 23 22 23 24 36 43 47 40 RELATIVE HUMIDITY (MEAN% 03UTC) 86 80 82 80 78 62 53 49 56 72 81 80 72 RELATIVE HUMIDITY (MEAN% 09UTC) 78 78 60 50 41 28 28 27 30 45 51 56 48 RELATIVE HUMIDITY (MEAN% 15UTC) 79 80 58 53 39 27 24 26 30 48 57 63 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 111.6 26.9 67.4 77.0 58.8 0.0 2.0 3.0 1.2 26.7 17.0 20.5 412.1 DAYS WITH PRECIPITATION >=10 4 0 3 3 2 0 0 0 0 0 1 0 13 DAYS WITH PRECIPITATION >= 5 7 2 6 6 3 0 0 0 0 2 1 2 29 DAYS WITH PRECIPITATION >= 1 13 10 11 15 6 0 1 1 1 7 3 6 74 DAYS WITH PRECIPITATION 14 13 14 16 8 4 3 1 3 11 4 9 100 GREATEST DAILY PRECIPITATION 25.0 6.0 15.0 19.0 31.0 0.0 2.0 3.0 1.2 9.0 11.0 5.0 31.0 DAY 28 20 20 30 7 ** 11 27 17 21 2 24 DAY WITH THUNDER STORM 1 0 0 2 3 1 0 0 2 3 0 1 13 DAYS WITH SNOW OR SLEET 12 9 0 1 0 0 0 0 0 0 0 3 25 DAYS WITH DUST 0 0 11 3 4 9 14 14 3 6 0 2 66 WIND DIRECTION (PREVAILING) 135 315 225 315 315 315 315 135 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 10.5 7.9 16.4 8.4 10.3 7.8 8.6 10.5 7.6 7.9 6.7 6.6 8.1 PREVAILING WIND PERCENT 19.0 17.5 22.6 20.1 27.9 26.4 27.9 34.3 22.5 21.0 30.8 18.2 21.3 CALMS PERCENT OF WIND 29.8 44.4 12.9 13.0 8.5 10.0 5.7 8.1 9.2 11.3 16.3 17.8 15.4 NO. OF WIND OBSERVATION 248 223 248 239 247 239 247 248 240 248 240 247 2914 VECTOR WIND DIRECTION (MEAN) 127 246 231 251 283 290 325 114 286 266 322 254 258 VECTOR WIND MAGNITUDE(KNOTS) 1.8 1.4 4.6 3.3 3.6 2.7 1.1 4.5 0.9 3.2 2.4 2.4 1.4 WIND STEADINESES (MEAN %) 30.0 29.8 47.9 38.4 41.9 33.7 12.9 51.7 11.8 40.5 42.9 35.8 18.7 WIND SPEED (MEAN KNOTS) 6.0 4.7 9.6 8.6 8.6 8.0 8.5 8.7 7.6 7.9 5.6 6.7 7.5 FASTEST WIND DIRECTION 90 180 210 180 240 210 280 90 210 240 280 220 180 FASTEST WIND SPEED (KNOTS) 25 35 40 42 30 25 25 20 30 30 20 25 42 DAY 7 8 8 2 4 15 27 1 10 15 9 5 DAYS WITH SKY CLEAR (0-2)/8 1 1 0 5 13 22 27 25 19 7 18 12 150 DAYS WITH P.CLOUDY (3-6)/8 9 11 9 12 13 8 4 5 11 18 9 12 121 DAYS WITH CLOUDY (7-8)/8 21 16 22 13 5 0 0 1 0 6 3 7 94 DAYS WITH VISIBILITY =< 2 KM 23 19 2 3 1 0 0 0 1 1 1 2 53 DURATION OF SUNSHINE HOURS 49.7 107.9 74.5 177.1 275.3 339.4 363.3 326.3 274.2 206.0 221.9 180.6 2596.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 830.6 832.1 829.1 830.0 831.7 829.7 827.3 830.2 833.0 834.2 835.3 833.2 831.4 MAX. QFE PRESSURE IN HPA 836.9 840.9 834.1 835.3 839.1 834.9 830.9 838.0 838.5 840.0 841.5 839.3 841.5 DAY-HOUR 9- 6 3- 6 12- 6 22- 3 21-21 3- 6 15- 6 31- 6 14- 3 10- 6 23- 6 10- 6 MIN. QFE PRESSURE IN HPA 820.3 821.0 820.1 819.2 826.2 823.3 822.4 823.8 825.7 825.3 828.4 825.1 819.2 DAY-HOUR 24-21 8-15 22- 3 17- 9 2-15 14-15 29-15 8-15 10-12 29-12 8-12 31-12 MEAN QNH PRESSURE IN HPA 1017.1 1018.9 1015.3 1016.5 1018.4 1016.0 1013.2 1016.6 1019.9 1021.4 1022.6 1020.2 1018.0 MAX. QNH PRESSURE IN HPA 1024.6 1029.3 1021.3 1022.7 1027.1 1022.2 1017.5 1025.8 1026.4 1028.2 1030.0 1027.4 1030.0 DAY-HOUR 9- 6 3- 6 12- 6 22- 3 21-21 3- 6 15- 6 31- 6 14- 3 10- 6 23- 6 10- 6 MIN. QNH PRESSURE IN HPA 1005.0 1005.8 1004.7 1003.7 1011.9 1008.5 1007.5 1009.1 1011.4 1010.9 1014.5 1010.6 1003.7 DAY-HOUR 24-21 8-15 22- 3 17- 9 2-15 14-15 29-15 8-15 10-12 29-12 8-12 31-12 MEAN QFF PRESSURE IN HPA 1024.5 1027.3 1012.2 1012.0 1009.6 1003.6 998.6 1002.6 1009.7 1014.0 1023.0 1021.7 1013.2 MAX. QFF PRESSURE IN HPA 1038.8 1054.8 1021.3 1021.5 1021.0 1013.2 1006.4 1016.4 1021.4 1022.1 1034.9 1033.5 1054.8 DAY-HOUR 9- 6 4-18 2- 6 15- 3 21-21 2- 3 13- 3 30- 3 14- 3 31- 3 24- 6 11- 6 MIN. QFF PRESSURE IN HPA 1006.9 1011.1 1000.9 997.6 1000.8 995.4 991.2 993.3 997.6 1005.6 1011.1 1010.4 991.2 DAY-HOUR 23-12 8-21 22- 0 17- 9 27- 9 14-12 28-12 8-12 10-12 29- 0 8-21 23-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 830.7 831.9 828.9 829.9 831.6 829.9 827.7 830.3 833.2 834.4 835.3 833.4 831.4 MAX. QFE PRESSURE IN HPA 836.0 839.8 832.8 834.3 838.4 834.3 829.9 836.7 838.3 838.9 840.6 837.7 840.6 DAY 9 3 12 27 22 3 3 31 14 10 24 10 MIN. QFE PRESSURE IN HPA 822.0 826.0 820.3 821.2 827.3 824.8 824.5 826.1 828.0 825.7 828.5 825.7 820.3 DAY 25 9 22 13 3 15 19 8 10 29 9 31 MEAN QNH PRESSURE IN HPA 1017.2 1018.7 1015.1 1016.3 1018.3 1016.3 1013.6 1016.8 1020.2 1021.6 1022.7 1020.5 1018.1 MAX. QNH PRESSURE IN HPA 1023.5 1028.0 1019.7 1021.5 1026.3 1021.5 1016.3 1024.3 1026.2 1026.9 1028.9 1025.5 1028.9 DAY 9 3 12 27 22 3 3 31 14 10 24 10 MIN. QNH PRESSURE IN HPA 1007.0 1011.7 1005.0 1006.0 1013.2 1010.3 1009.9 1011.8 1014.1 1011.4 1014.7 1011.4 1005.0 DAY 25 9 22 13 3 15 19 8 10 29 9 31 MEAN QFF PRESSURE IN HPA 1023.4 1026.4 1011.5 1011.7 1009.3 1004.2 999.2 1002.5 1009.6 1013.6 1022.1 1021.1 1012.9 MAX. QFF PRESSURE IN HPA 1035.0 1050.3 1019.7 1019.0 1018.2 1012.2 1004.4 1013.7 1019.9 1018.4 1030.2 1027.7 1050.3 DAY 12 5 25 15 22 2 12 31 14 31 25 11 MIN. QFF PRESSURE IN HPA 1011.6 1012.8 1000.9 999.1 1002.2 996.3 994.4 996.1 1000.0 1005.6 1011.7 1010.5 994.4 DAY 23 9 22 2 27 15 29 8 10 29 9 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 830.5 832.1 829.1 830.2 831.9 830.5 828.3 830.9 833.5 834.6 835.5 833.5 831.7 MAX. QFE PRESSURE IN HPA 836.0 839.6 833.3 835.3 838.6 834.5 830.7 837.5 838.5 838.9 840.5 838.4 840.5 DAY 12 3 12 22 22 3 15 31 14 10 24 10 MIN. QFE PRESSURE IN HPA 821.8 827.7 820.1 820.5 827.9 825.4 825.0 826.5 828.4 825.7 828.7 825.6 820.1 DAY 23 20 22 13 19 15 19 8 10 29 9 31 MEAN QNH PRESSURE IN HPA 1017.0 1018.8 1015.4 1016.7 1018.6 1017.0 1014.4 1017.5 1020.6 1021.8 1022.9 1020.6 1018.4 MAX. QNH PRESSURE IN HPA 1023.5 1027.7 1020.3 1022.7 1026.6 1021.7 1017.2 1025.3 1026.4 1026.9 1028.8 1026.3 1028.8 DAY 12 3 12 22 22 3 15 31 14 10 24 10 MIN. QNH PRESSURE IN HPA 1006.8 1013.7 1004.7 1005.2 1013.9 1011.0 1010.5 1012.3 1014.5 1011.4 1014.9 1011.2 1004.7 DAY 23 20 22 13 19 15 19 8 10 29 9 31 MEAN QFF PRESSURE IN HPA 1025.0 1028.2 1012.8 1012.9 1010.7 1005.7 1000.7 1004.9 1011.9 1015.9 1024.7 1022.9 1014.7 MAX. QFF PRESSURE IN HPA 1037.4 1051.7 1020.2 1021.5 1019.7 1013.2 1006.4 1016.4 1021.4 1022.1 1032.4 1032.5 1051.7 DAY 12 5 25 15 22 2 13 30 14 31 23 10 MIN. QFF PRESSURE IN HPA 1009.7 1015.0 1001.1 998.3 1003.8 997.9 996.4 998.8 1002.8 1006.4 1012.3 1010.7 996.4 DAY 23 20 22 2 27 15 30 7 10 29 2 24 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 831.5 833.0 830.0 830.8 832.5 830.7 828.5 831.3 834.3 835.4 836.3 834.5 832.4 MAX. QFE PRESSURE IN HPA 836.9 840.9 834.1 835.3 838.9 834.9 830.9 838.0 838.5 840.0 841.5 839.3 841.5 DAY 9 3 12 29 22 3 15 31 14 10 23 10 MIN. QFE PRESSURE IN HPA 822.4 827.8 822.0 820.8 828.0 825.5 824.8 826.5 828.5 826.9 829.7 826.5 820.8 DAY 23 8 20 13 19 15 19 8 10 29 8 31 MEAN QNH PRESSURE IN HPA 1018.1 1019.9 1016.5 1017.4 1019.4 1017.2 1014.7 1018.0 1021.5 1022.8 1023.9 1021.7 1019.3 MAX. QNH PRESSURE IN HPA 1024.6 1029.3 1021.3 1022.7 1026.9 1022.2 1017.5 1025.8 1026.4 1028.2 1030.0 1027.4 1030.0 DAY 9 3 12 29 22 3 15 31 14 10 23 10 MIN. QNH PRESSURE IN HPA 1007.5 1013.8 1007.0 1005.6 1014.1 1011.1 1010.3 1012.3 1014.7 1012.8 1016.1 1012.3 1005.6 DAY 23 8 20 13 19 15 19 8 10 29 8 31 MEAN QFF PRESSURE IN HPA 1026.2 1029.1 1013.9 1012.9 1010.5 1004.5 999.6 1003.7 1011.3 1015.6 1025.0 1024.0 1014.7 MAX. QFF PRESSURE IN HPA 1038.8 1052.9 1021.3 1020.5 1018.9 1012.1 1004.9 1015.2 1020.2 1021.5 1034.9 1033.5 1052.9 DAY 9 5 2 15 22 2 12 31 14 31 24 11 MIN. QFF PRESSURE IN HPA 1010.7 1015.3 1003.3 999.7 1002.7 998.3 994.7 996.6 1001.6 1007.9 1013.4 1013.4 994.7 DAY 23 20 20 2 27 14 28 8 10 29 8 31 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 830.9 832.7 829.6 830.2 832.1 830.0 827.7 830.5 833.3 834.6 835.6 833.6 831.7 MAX. QFE PRESSURE IN HPA 836.8 840.4 833.6 835.0 838.4 834.1 830.5 837.4 837.7 839.4 840.8 838.5 840.8 DAY 9 3 2 22 22 3 15 31 30 10 24 22 MIN. QFE PRESSURE IN HPA 821.2 824.9 821.0 819.2 827.2 825.2 823.8 825.7 827.3 826.3 829.0 825.7 819.2 DAY 23 8 20 17 19 15 19 8 10 29 8 31 MEAN QNH PRESSURE IN HPA 1017.4 1019.6 1015.9 1016.7 1018.9 1016.4 1013.7 1017.0 1020.3 1021.8 1023.0 1020.6 1018.4 MAX. QNH PRESSURE IN HPA 1024.4 1028.7 1020.7 1022.3 1026.3 1021.3 1017.0 1025.1 1025.5 1027.5 1029.1 1026.4 1029.1 DAY 9 3 2 22 22 3 15 31 30 10 24 22 MIN. QNH PRESSURE IN HPA 1006.0 1010.4 1005.8 1003.7 1013.1 1010.8 1009.1 1011.4 1013.2 1012.1 1015.2 1011.4 1003.7 DAY 23 8 20 17 19 15 19 8 10 29 8 31 MEAN QFF PRESSURE IN HPA 1024.4 1027.6 1012.5 1011.6 1009.7 1003.3 998.3 1002.2 1009.0 1013.4 1022.3 1021.4 1013.0 MAX. QFF PRESSURE IN HPA 1037.8 1051.0 1020.0 1019.3 1019.0 1011.8 1003.6 1013.9 1018.6 1019.3 1031.2 1028.4 1051.0 DAY 31 4 2 14 21 2 13 31 13 27 24 11 MIN. QFF PRESSURE IN HPA 1008.5 1015.8 1002.3 997.6 1000.8 997.0 992.8 995.7 999.2 1006.1 1011.5 1011.7 992.8 DAY 23 28 20 17 27 14 18 8 10 29 8 31 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 829.9 831.5 828.2 829.2 831.1 828.7 826.1 829.0 831.8 833.2 834.4 832.2 830.4 MAX. QFE PRESSURE IN HPA 835.9 838.6 832.4 833.6 836.7 833.0 828.7 835.8 836.7 837.3 839.5 837.1 839.5 DAY 9 2 2 24 21 3 15 31 30 10 24 10 MIN. QFE PRESSURE IN HPA 820.4 821.2 821.5 819.5 826.4 823.8 822.9 823.9 825.7 825.3 828.4 825.1 819.5 DAY 23 8 22 17 2 15 19 8 10 29 8 31 MEAN QNH PRESSURE IN HPA 1016.3 1018.2 1014.3 1015.4 1017.7 1014.9 1011.9 1015.3 1018.6 1020.1 1021.6 1019.0 1016.9 MAX. QNH PRESSURE IN HPA 1023.4 1026.6 1019.2 1020.7 1024.3 1020.0 1014.9 1023.3 1024.3 1025.0 1027.6 1024.8 1027.6 DAY 9 2 2 24 21 3 15 31 30 10 24 10 MIN. QNH PRESSURE IN HPA 1005.1 1006.0 1006.4 1004.0 1012.2 1009.1 1008.0 1009.2 1011.4 1010.9 1014.5 1010.6 1004.0 DAY 23 8 22 17 2 15 19 8 10 29 8 31 MEAN QFF PRESSURE IN HPA 1022.6 1025.5 1010.4 1010.8 1008.7 1002.2 997.0 1000.8 1007.7 1012.1 1020.9 1019.5 1011.5 MAX. QFF PRESSURE IN HPA 1036.4 1048.0 1018.6 1018.0 1016.9 1009.3 1003.9 1012.8 1017.8 1017.0 1029.1 1026.0 1048.0 DAY 9 4 2 14 21 2 11 30 13 31 24 11 MIN. QFF PRESSURE IN HPA 1006.9 1012.6 1002.0 999.6 1001.4 995.4 991.2 993.3 997.6 1006.5 1011.8 1011.0 991.2 DAY 23 28 8 17 27 14 28 8 10 29 8 13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 830.2 831.7 828.2 829.3 830.8 828.3 825.6 828.8 831.7 833.1 834.6 832.5 830.4 MAX. QFE PRESSURE IN HPA 836.2 839.0 832.8 833.5 836.5 832.5 828.3 835.4 836.7 837.0 839.6 837.0 839.6 DAY 9 2 2 24 21 3 11 30 30 9 23 10 MIN. QFE PRESSURE IN HPA 823.6 821.0 820.9 821.7 826.2 823.3 822.4 823.8 825.7 825.5 828.5 825.8 820.9 DAY 24 8 20 17 2 14 29 8 10 29 8 13 MEAN QNH PRESSURE IN HPA 1016.7 1018.4 1014.3 1015.6 1017.4 1014.4 1011.3 1015.0 1018.4 1020.1 1021.8 1019.3 1016.9 MAX. QNH PRESSURE IN HPA 1023.7 1027.0 1019.7 1020.5 1024.1 1019.4 1014.4 1022.8 1024.3 1024.7 1027.7 1024.7 1027.7 DAY 9 2 2 24 21 3 11 30 30 9 23 10 MIN. QNH PRESSURE IN HPA 1008.9 1005.8 1005.7 1006.6 1011.9 1008.5 1007.5 1009.1 1011.4 1011.1 1014.7 1011.5 1005.7 DAY 24 8 20 17 2 14 29 8 10 29 8 13 MEAN QFF PRESSURE IN HPA 1024.8 1027.4 1011.5 1011.8 1009.3 1002.9 997.4 1002.2 1009.5 1014.0 1023.5 1021.5 1013.0 MAX. QFF PRESSURE IN HPA 1037.8 1051.0 1019.0 1018.8 1016.9 1010.0 1003.2 1014.1 1019.6 1020.2 1031.2 1029.7 1051.0 DAY 31 4 2 14 21 1 11 30 13 31 23 10 MIN. QFF PRESSURE IN HPA 1012.1 1013.6 1004.0 1002.9 1003.1 996.2 992.6 994.9 1000.0 1006.6 1012.4 1012.5 992.6 DAY 23 13 22 1 27 14 29 7 10 28 8 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 830.7 832.2 829.4 830.3 831.8 829.5 827.0 830.0 832.8 834.2 835.3 833.0 831.4 MAX. QFE PRESSURE IN HPA 836.3 839.7 833.3 835.0 838.4 833.5 829.3 836.5 837.6 838.3 840.4 837.5 840.4 DAY 9 2 2 26 21 2 11 30 30 9 24 10 MIN. QFE PRESSURE IN HPA 821.1 824.1 823.4 821.1 827.5 823.9 823.9 825.4 827.5 826.3 828.5 826.5 821.1 DAY 24 8 20 12 2 14 29 8 10 29 8 30 MEAN QNH PRESSURE IN HPA 1017.3 1019.0 1015.7 1016.8 1018.6 1015.8 1012.9 1016.5 1019.8 1021.3 1022.7 1020.0 1018.0 MAX. QNH PRESSURE IN HPA 1023.8 1027.8 1020.3 1022.3 1026.3 1020.5 1015.6 1024.1 1025.4 1026.2 1028.7 1025.3 1028.7 DAY 9 2 2 26 21 2 11 30 30 9 24 10 MIN. QNH PRESSURE IN HPA 1005.9 1009.5 1008.6 1005.9 1013.5 1009.2 1009.2 1011.0 1013.5 1012.1 1014.7 1012.3 1005.9 DAY 24 8 20 12 2 14 29 8 10 29 8 30 MEAN QFF PRESSURE IN HPA 1025.5 1027.9 1013.0 1012.4 1009.6 1003.0 998.0 1002.2 1009.6 1014.3 1023.7 1022.2 1013.4 MAX. QFF PRESSURE IN HPA 1038.1 1054.8 1020.7 1020.7 1019.3 1010.3 1004.0 1013.5 1019.3 1020.2 1031.8 1031.5 1054.8 DAY 31 4 24 14 21 1 6 30 13 31 23 10 MIN. QFF PRESSURE IN HPA 1013.7 1014.0 1005.7 1000.0 1003.1 995.9 992.3 995.2 1001.0 1006.2 1012.0 1012.1 992.3 DAY 19 8 19 1 26 14 17 8 10 28 8 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 830.6 832.1 829.4 830.5 832.0 830.0 827.6 830.6 833.2 834.3 835.5 833.3 831.6 MAX. QFE PRESSURE IN HPA 835.7 840.1 833.4 835.0 839.1 834.2 830.0 836.8 838.0 839.0 840.6 838.0 840.6 DAY 8 2 11 26 21 2 2 30 13 9 24 9 MIN. QFE PRESSURE IN HPA 820.3 824.7 822.8 822.0 827.9 824.6 824.2 826.1 828.3 826.2 828.6 825.5 820.3 DAY 24 8 21 12 2 14 18 7 10 29 8 30 MEAN QNH PRESSURE IN HPA 1017.1 1018.9 1015.8 1017.0 1018.8 1016.4 1013.5 1017.2 1020.2 1021.5 1022.9 1020.3 1018.3 MAX. QNH PRESSURE IN HPA 1023.1 1028.3 1020.4 1022.3 1027.1 1021.4 1016.4 1024.4 1025.8 1027.0 1028.9 1025.8 1028.9 DAY 8 2 11 26 21 2 2 30 13 9 24 9 MIN. QNH PRESSURE IN HPA 1005.0 1010.2 1007.9 1007.0 1013.9 1010.1 1009.6 1011.8 1014.4 1011.9 1014.8 1011.1 1005.0 DAY 24 8 21 12 2 14 18 7 10 29 8 30 MEAN QFF PRESSURE IN HPA 1024.4 1026.6 1012.3 1012.0 1009.6 1003.5 998.4 1002.5 1009.1 1013.4 1022.4 1021.1 1012.9 MAX. QFF PRESSURE IN HPA 1037.3 1051.7 1021.1 1020.2 1021.0 1012.6 1003.6 1013.2 1019.0 1019.3 1030.7 1028.8 1051.7 DAY 31 4 11 14 21 1 11 30 13 31 24 10 MIN. QFF PRESSURE IN HPA 1012.7 1011.1 1004.1 997.8 1002.7 996.3 993.1 996.3 999.7 1005.8 1011.1 1010.4 993.1 DAY 24 8 21 1 26 14 18 7 9 28 8 23 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.2 1.9 5.7 12.1 16.5 22.1 25.1 24.9 18.9 12.3 7.7 -0.6 12.1 MINIMUN AIR TEMPERATURE (C) -5.8 -5.8 -1.2 3.6 6.6 9.6 14.9 13.7 7.1 1.1 -0.9 -5.8 3.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 19 22 7 0 0 0 0 0 0 2 8 22 80 DAYS WITH FREEZING MIN.<= 0 31 26 21 5 0 0 0 0 0 10 20 29 142 TEMPERATURE RECORDS LOWEST(C) -17.0 -12.0 -6.0 -1.0 3.0 5.0 12.0 6.0 3.0 -4.0 -7.0 -13.0 -17.0 DAY 29 2 1 14 8 1 6 28 21 25 19 16 MAXIMUM AIR TEMPERATURE (C) 4.8 11.4 13.7 20.8 25.5 32.9 34.4 35.3 29.7 23.2 16.5 5.4 21.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 7 26 31 31 16 1 0 0 112 DAYS WITH MAXIMUM TEMP. <= 0 2 0 0 0 0 0 0 0 0 0 0 6 8 TEMPERATURE RECORDS HIGHEST(C) 10.0 15.0 24.0 28.0 33.0 39.0 39.0 38.0 36.0 30.0 22.0 16.0 39.0 DAY 20 8 31 15 23 29 30 11 2 3 1 4 DIF. BETWEEN (MAX.-MIN.) (C) 10.6 17.2 14.9 17.2 18.9 23.3 19.5 21.6 22.6 22.1 17.4 11.2 18.0 MEAN DAILY TEMP. (MDT) (C) -0.5 2.8 6.2 12.2 16.1 21.2 24.6 24.5 18.4 12.1 7.8 -0.2 12.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.5 28.5 113.0 111.5 6.0 0.0 0.0 0.0 259.5 HEATING DEG. DAYS(BASE 18 0C) 574.0 426.0 365.0 173.5 70.0 2.5 0.0 0.0 22.0 181.5 306.5 564.5 2685.5 DEWPOINT (MEAN C) -4.8 -5.1 -2.4 -0.4 1.4 4.6 6.5 5.6 2.0 -2.0 -2.7 -5.4 -0.2 MIXING RATIO (G/KG) 3.35 3.27 3.98 4.58 5.36 6.60 7.54 7.22 5.50 4.08 3.89 3.21 4.88 VAPOUR PRESSURE (HPA) 4.45 4.34 5.27 6.08 7.10 8.70 9.90 9.47 7.28 5.43 5.19 4.27 6.46 SATURATION DEF. (HPA) 1.41 3.29 4.61 9.20 13.38 20.67 23.96 24.49 16.85 10.60 6.14 2.01 11.39 RELATIVE HUMIDITY (MEAN %) 78 62 61 48 43 35 33 32 36 40 50 73 49 RELATIVE HUMIDITY (MAX. %) 91 82 84 74 70 57 50 51 53 61 67 88 69 RELATIVE HUMIDITY (MIN. %) 60 40 36 25 21 20 20 18 20 23 32 52 31 RELATIVE HUMIDITY (MEAN% 03UTC) 85 79 79 70 68 51 48 50 51 56 64 84 65 RELATIVE HUMIDITY (MEAN% 09UTC) 66 48 48 33 26 24 26 23 26 27 39 59 37 RELATIVE HUMIDITY (MEAN% 15UTC) 75 56 48 35 26 22 22 20 23 29 42 67 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 20.5 6.2 46.4 51.5 22.4 0.0 0.0 0.0 0.0 2.0 9.0 35.0 193.0 DAYS WITH PRECIPITATION >=10 0 0 0 1 0 0 0 0 0 0 0 2 3 DAYS WITH PRECIPITATION >= 5 0 0 4 5 2 0 0 0 0 0 0 2 13 DAYS WITH PRECIPITATION >= 1 7 4 11 5 5 0 0 0 0 1 3 5 41 DAYS WITH PRECIPITATION 11 5 13 8 6 0 0 0 0 1 3 7 54 GREATEST DAILY PRECIPITATION 4.0 3.0 8.0 23.0 9.0 0.0 0.0 0.0 0.0 2.0 4.0 16.0 23.0 DAY 7 25 4 29 11 ** ** ** ** 14 28 13 DAY WITH THUNDER STORM 0 0 0 1 3 0 0 0 0 0 1 0 5 DAYS WITH SNOW OR SLEET 8 1 4 0 0 0 0 0 0 0 0 7 20 DAYS WITH DUST 0 4 4 14 10 9 21 13 11 6 0 1 93 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 135 135 315 315 270 315 PREVAILING WIND SPEED(KNOTS) 7.9 8.6 8.5 9.0 8.4 7.8 8.9 9.9 6.9 6.6 6.4 6.8 7.9 PREVAILING WIND PERCENT 32.5 25.9 22.7 26.4 26.6 30.4 25.0 27.9 17.1 18.1 16.3 14.6 22.2 CALMS PERCENT OF WIND 19.1 22.3 11.7 16.7 16.1 12.1 9.3 13.0 29.6 25.8 23.8 36.8 19.7 NO. OF WIND OBSERVATION 246 224 247 239 248 240 248 247 240 248 240 247 2914 VECTOR WIND DIRECTION (MEAN) 305 279 259 273 265 290 356 144 134 266 258 349 275 VECTOR WIND MAGNITUDE(KNOTS) 1.7 3.8 1.7 3.1 4.0 2.0 0.5 2.0 0.3 2.0 1.1 1.4 1.5 WIND STEADINESES (MEAN %) 26.2 54.3 21.0 34.8 49.4 26.3 6.1 26.0 5.7 32.3 19.0 28.0 21.4 WIND SPEED (MEAN KNOTS) 6.5 7.0 8.1 8.9 8.1 7.6 8.2 7.7 5.3 6.2 5.8 5.0 7.0 FASTEST WIND DIRECTION 100 270 180 180 220 180 240 270 360 210 250 20 180 FASTEST WIND SPEED (KNOTS) 20 30 35 45 30 25 30 25 18 35 20 35 45 DAY 21 10 22 19 5 19 13 28 16 14 4 11 DAYS WITH SKY CLEAR (0-2)/8 7 11 8 4 13 29 26 31 27 27 4 7 194 DAYS WITH P.CLOUDY (3-6)/8 11 13 12 16 17 1 5 0 3 4 23 18 123 DAYS WITH CLOUDY (7-8)/8 13 4 11 10 1 0 0 0 0 0 3 5 47 DAYS WITH VISIBILITY =< 2 KM 3 3 1 1 0 0 2 1 0 1 0 5 17 DURATION OF SUNSHINE HOURS 121.5 179.8 182.1 197.6 319.5 373.9 351.5 350.8 277.0 261.7 187.2 139.6 2942.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 831.5 831.7 830.6 832.8 831.1 828.4 826.5 826.5 830.6 834.0 835.7 833.2 831.0 MAX. QFE PRESSURE IN HPA 839.0 837.2 836.6 839.0 836.8 832.4 830.3 833.4 836.8 840.0 840.9 842.4 842.4 DAY-HOUR 3- 6 16- 6 27- 6 12-21 22- 6 11- 6 9- 6 29- 6 27-21 12- 6 14-18 31- 6 MIN. QFE PRESSURE IN HPA 822.5 822.7 820.4 820.0 826.7 822.8 822.0 821.6 824.1 826.7 831.5 824.5 820.0 DAY-HOUR 22-12 19- 3 19-12 19-15 15-12 30-15 4-15 16-15 1-15 8-12 28-12 13-12 MEAN QNH PRESSURE IN HPA 1018.2 1018.4 1017.1 1019.7 1017.7 1014.5 1012.3 1012.3 1017.2 1021.1 1023.1 1020.1 1017.6 MAX. QNH PRESSURE IN HPA 1027.0 1024.9 1024.2 1027.0 1024.4 1019.2 1016.8 1020.4 1024.4 1028.2 1029.3 1031.0 1031.0 DAY-HOUR 3- 6 16- 6 27- 6 12-21 22- 6 11- 6 9- 6 29- 6 27-21 12- 6 14-18 31- 6 MIN. QNH PRESSURE IN HPA 1007.6 1007.8 1005.1 1004.6 1012.5 1007.9 1007.0 1006.5 1009.5 1012.5 1018.2 1009.9 1004.6 DAY-HOUR 22-12 19- 3 19-12 19-15 15-12 30-15 4-15 16-15 1-15 8-12 28-12 13-12 MEAN QFF PRESSURE IN HPA 1021.9 1020.0 1015.7 1013.8 1008.7 1001.7 997.4 997.5 1006.5 1015.1 1020.5 1023.5 1011.9 MAX. QFF PRESSURE IN HPA 1033.6 1031.4 1025.6 1022.2 1016.1 1011.1 1003.1 1009.4 1016.7 1023.8 1028.3 1039.4 1039.4 DAY-HOUR 3- 6 7- 6 26- 3 13- 3 1- 3 11- 3 27- 3 29- 3 22- 3 27- 3 14- 6 31- 6 MIN. QFF PRESSURE IN HPA 1009.0 1004.2 1000.7 994.1 1001.7 992.3 991.6 990.6 995.0 1004.3 1012.7 1011.4 990.6 DAY-HOUR 22-12 19- 0 19-12 19- 9 20- 9 30-12 4-12 16-12 1-12 8-12 9-12 13-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 831.5 831.7 830.7 832.7 831.3 828.8 826.7 826.9 830.8 834.1 836.0 833.2 831.2 MAX. QFE PRESSURE IN HPA 837.8 836.0 835.4 838.7 835.4 831.2 829.0 831.5 836.8 838.2 840.4 841.7 841.7 DAY 3 6 26 13 22 4 9 29 28 12 15 31 MIN. QFE PRESSURE IN HPA 823.9 822.8 823.1 825.0 828.1 825.0 824.0 824.4 826.0 828.7 831.9 827.0 822.8 DAY 23 19 19 19 16 30 5 7 1 9 28 11 MEAN QNH PRESSURE IN HPA 1018.2 1018.4 1017.2 1019.6 1017.9 1015.0 1012.6 1012.7 1017.3 1021.2 1023.5 1020.2 1017.8 MAX. QNH PRESSURE IN HPA 1025.6 1023.5 1022.8 1026.7 1022.8 1017.8 1015.2 1018.2 1024.4 1026.1 1028.7 1030.2 1030.2 DAY 3 6 26 13 22 4 9 29 28 12 15 31 MIN. QNH PRESSURE IN HPA 1009.2 1007.9 1008.3 1010.5 1014.2 1010.5 1009.3 1009.8 1011.7 1014.9 1018.7 1012.9 1007.9 DAY 23 19 19 19 16 30 5 7 1 9 28 11 MEAN QFF PRESSURE IN HPA 1021.3 1019.0 1015.2 1013.2 1008.7 1002.3 997.4 997.6 1006.0 1014.4 1019.9 1022.7 1011.5 MAX. QFF PRESSURE IN HPA 1030.0 1027.1 1022.5 1019.5 1014.6 1008.9 1000.4 1005.9 1013.8 1020.2 1024.6 1037.6 1037.6 DAY 29 8 26 13 12 11 7 29 22 27 15 31 MIN. QFF PRESSURE IN HPA 1011.6 1004.2 1003.1 1001.3 1003.5 994.5 993.1 994.3 997.7 1006.5 1014.1 1013.3 993.1 DAY 22 19 19 19 16 30 5 7 1 6 28 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 831.2 831.8 830.9 833.1 831.6 829.4 827.4 827.5 831.3 834.5 836.2 833.1 831.5 MAX. QFE PRESSURE IN HPA 838.0 835.9 836.0 838.5 836.2 832.2 830.0 832.7 836.8 838.9 840.4 841.6 841.6 DAY 3 16 26 13 22 11 9 29 28 12 15 31 MIN. QFE PRESSURE IN HPA 824.7 822.7 823.6 824.7 827.8 825.6 824.6 825.0 826.4 829.3 832.3 827.3 822.7 DAY 22 19 19 19 16 30 5 16 1 9 28 11 MEAN QNH PRESSURE IN HPA 1017.8 1018.6 1017.5 1020.1 1018.3 1015.7 1013.3 1013.4 1018.0 1021.7 1023.7 1020.1 1018.2 MAX. QNH PRESSURE IN HPA 1025.8 1023.4 1023.5 1026.4 1023.7 1019.0 1016.4 1019.6 1024.4 1026.9 1028.7 1030.1 1030.1 DAY 3 16 26 13 22 11 9 29 28 12 15 31 MIN. QNH PRESSURE IN HPA 1010.2 1007.8 1008.9 1010.2 1013.8 1011.2 1010.1 1010.5 1012.2 1015.6 1019.1 1013.2 1007.8 DAY 22 19 19 19 16 30 5 16 1 9 28 11 MEAN QFF PRESSURE IN HPA 1022.1 1021.4 1017.0 1015.3 1010.5 1003.6 999.2 999.6 1008.7 1017.4 1022.4 1024.2 1013.5 MAX. QFF PRESSURE IN HPA 1032.2 1029.2 1025.6 1022.2 1016.1 1011.1 1003.1 1009.4 1016.7 1023.8 1027.4 1038.7 1038.7 DAY 3 3 26 13 1 11 27 29 22 27 15 31 MIN. QFF PRESSURE IN HPA 1011.7 1005.7 1003.2 1001.6 1003.8 995.8 994.4 995.8 999.5 1009.4 1015.5 1014.4 994.4 DAY 22 19 19 19 16 30 5 3 1 14 28 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 832.2 832.7 831.7 833.8 831.9 829.6 827.7 827.8 831.9 835.3 837.0 834.1 832.1 MAX. QFE PRESSURE IN HPA 839.0 837.2 836.6 838.8 836.8 832.4 830.3 833.4 836.8 840.0 840.9 842.4 842.4 DAY 3 16 27 13 22 11 9 29 28 12 15 31 MIN. QFE PRESSURE IN HPA 825.0 825.0 823.7 822.1 828.0 826.2 824.8 824.9 826.8 829.9 832.6 827.8 822.1 DAY 22 19 19 19 16 30 5 16 1 9 28 13 MEAN QNH PRESSURE IN HPA 1019.0 1019.6 1018.4 1020.8 1018.7 1016.0 1013.7 1013.9 1018.7 1022.6 1024.7 1021.3 1018.9 MAX. QNH PRESSURE IN HPA 1027.0 1024.9 1024.2 1026.8 1024.4 1019.2 1016.8 1020.4 1024.4 1028.2 1029.3 1031.0 1031.0 DAY 3 16 27 13 22 11 9 29 28 12 15 31 MIN. QNH PRESSURE IN HPA 1010.5 1010.5 1009.0 1007.1 1014.1 1011.9 1010.3 1010.4 1012.6 1016.3 1019.5 1013.8 1007.1 DAY 22 19 19 19 16 30 5 16 1 9 28 13 MEAN QFF PRESSURE IN HPA 1023.5 1022.3 1017.5 1015.2 1009.8 1003.0 998.9 999.2 1008.2 1017.1 1022.7 1025.4 1013.6 MAX. QFF PRESSURE IN HPA 1033.6 1031.4 1024.7 1021.5 1015.4 1011.0 1001.9 1008.6 1016.7 1023.8 1028.3 1039.4 1039.4 DAY 3 7 25 26 12 11 9 29 22 27 14 31 MIN. QFF PRESSURE IN HPA 1012.7 1008.6 1003.2 996.1 1003.9 995.7 994.5 995.0 999.6 1008.8 1016.3 1015.3 994.5 DAY 22 19 19 19 20 30 5 3 1 6 28 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 831.7 832.2 831.0 833.1 831.3 828.8 827.0 826.8 830.9 834.2 836.0 833.4 831.4 MAX. QFE PRESSURE IN HPA 838.2 837.1 835.8 837.4 836.6 831.4 829.2 832.7 836.0 838.4 840.3 841.8 841.8 DAY 3 3 27 12 22 4 9 29 27 11 14 31 MIN. QFE PRESSURE IN HPA 823.7 824.6 822.6 820.1 827.9 825.1 824.6 823.6 825.9 828.2 832.1 825.1 820.1 DAY 22 23 19 19 16 30 1 16 1 8 28 13 MEAN QNH PRESSURE IN HPA 1018.4 1019.0 1017.6 1020.0 1017.9 1015.0 1012.8 1012.7 1017.5 1021.4 1023.4 1020.4 1018.0 MAX. QNH PRESSURE IN HPA 1026.1 1024.8 1023.3 1025.1 1024.2 1018.1 1015.5 1019.6 1023.5 1026.3 1028.6 1030.3 1030.3 DAY 3 3 27 12 22 4 9 29 27 11 14 31 MIN. QNH PRESSURE IN HPA 1009.0 1010.1 1007.7 1004.7 1013.9 1010.6 1010.1 1008.9 1011.6 1014.3 1018.9 1010.6 1004.7 DAY 22 23 19 19 16 30 1 16 1 8 28 13 MEAN QFF PRESSURE IN HPA 1021.6 1019.4 1015.7 1013.2 1008.0 1001.7 997.3 997.1 1006.0 1014.1 1019.5 1023.2 1011.4 MAX. QFF PRESSURE IN HPA 1030.1 1028.4 1022.5 1018.8 1014.6 1008.9 1000.4 1005.9 1013.6 1019.7 1025.9 1038.1 1038.1 DAY 3 7 25 26 12 11 8 29 22 31 14 31 MIN. QFF PRESSURE IN HPA 1011.1 1008.7 1001.9 994.1 1001.7 994.3 993.6 993.0 997.6 1005.6 1015.1 1012.2 993.0 DAY 22 19 19 19 20 30 1 16 1 8 28 13 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 830.7 830.7 829.4 831.9 830.2 827.3 825.4 825.1 829.3 832.7 834.6 832.3 830.0 MAX. QFE PRESSURE IN HPA 837.3 836.0 834.3 836.4 835.6 830.3 827.7 830.7 834.8 836.8 839.3 840.8 840.8 DAY 3 7 27 12 22 4 8 29 27 11 14 30 MIN. QFE PRESSURE IN HPA 822.5 823.6 820.4 821.8 826.7 823.2 822.9 821.8 824.3 826.7 831.5 824.5 820.4 DAY 22 23 19 19 15 30 1 16 1 8 28 13 MEAN QNH PRESSURE IN HPA 1017.3 1017.2 1015.7 1018.6 1016.6 1013.2 1011.0 1010.6 1015.6 1019.6 1021.8 1019.2 1016.4 MAX. QNH PRESSURE IN HPA 1025.0 1023.5 1021.5 1024.0 1023.0 1016.8 1013.7 1017.2 1022.1 1024.4 1027.4 1029.1 1029.1 DAY 3 7 27 12 22 4 8 29 27 11 14 30 MIN. QNH PRESSURE IN HPA 1007.6 1008.9 1005.1 1006.8 1012.5 1008.4 1008.0 1006.8 1009.7 1012.5 1018.2 1009.9 1005.1 DAY 22 23 19 19 15 30 1 16 1 8 28 13 MEAN QFF PRESSURE IN HPA 1020.3 1017.4 1013.5 1012.2 1007.3 1000.2 995.6 995.3 1004.1 1012.6 1018.2 1021.7 1009.9 MAX. QFF PRESSURE IN HPA 1028.9 1027.0 1021.2 1017.8 1013.7 1007.6 999.0 1004.5 1012.0 1018.9 1025.2 1036.7 1036.7 DAY 3 7 25 25 12 11 8 29 18 31 14 30 MIN. QFF PRESSURE IN HPA 1009.0 1008.1 1000.7 1000.0 1002.0 992.3 991.6 990.6 995.0 1004.3 1012.7 1011.4 990.6 DAY 22 19 19 19 20 30 4 16 1 8 9 13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 831.2 830.9 829.5 831.8 830.0 826.7 824.8 824.8 829.2 833.0 834.7 832.7 830.0 MAX. QFE PRESSURE IN HPA 837.5 835.8 833.9 836.9 833.4 829.7 827.3 830.1 835.0 837.7 839.7 841.4 841.4 DAY 2 7 25 12 12 4 8 29 27 31 14 30 MIN. QFE PRESSURE IN HPA 822.9 824.4 821.7 820.0 826.8 822.8 822.0 821.6 824.1 827.0 831.6 825.8 820.0 DAY 22 23 19 19 15 30 4 16 1 8 27 13 MEAN QNH PRESSURE IN HPA 1017.9 1017.5 1015.8 1018.6 1016.5 1012.5 1010.3 1010.2 1015.5 1020.0 1022.0 1019.6 1016.4 MAX. QNH PRESSURE IN HPA 1025.3 1023.3 1021.0 1024.6 1020.4 1016.1 1013.2 1016.5 1022.3 1025.5 1027.8 1029.9 1029.9 DAY 2 7 25 12 12 4 8 29 27 31 14 30 MIN. QNH PRESSURE IN HPA 1008.0 1009.8 1006.6 1004.6 1012.6 1007.9 1007.0 1006.5 1009.5 1012.9 1018.3 1011.5 1004.6 DAY 22 23 19 19 15 30 4 16 1 8 27 13 MEAN QFF PRESSURE IN HPA 1022.2 1020.0 1015.1 1013.8 1008.4 1000.1 996.0 996.3 1006.0 1015.6 1020.6 1023.8 1011.5 MAX. QFF PRESSURE IN HPA 1030.9 1028.2 1022.5 1019.2 1014.1 1007.4 999.1 1005.2 1014.0 1021.7 1028.1 1038.5 1038.5 DAY 2 3 25 25 12 11 26 29 27 31 14 30 MIN. QFF PRESSURE IN HPA 1010.3 1009.3 1002.1 997.9 1003.1 992.3 991.8 991.8 996.0 1007.1 1015.1 1013.1 991.8 DAY 22 22 19 19 15 30 4 16 1 14 9 13 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 831.7 831.9 830.7 833.0 831.3 828.0 826.3 826.3 830.7 834.1 835.6 833.4 831.1 MAX. QFE PRESSURE IN HPA 837.9 836.2 834.8 838.1 835.9 831.1 828.6 831.0 836.5 839.3 840.9 841.3 841.3 DAY 3 7 26 12 22 4 8 29 27 31 14 30 MIN. QFE PRESSURE IN HPA 824.0 824.8 824.7 822.5 828.1 824.3 823.1 823.6 825.8 828.6 832.0 827.0 822.5 DAY 22 18 10 19 30 9 4 6 11 8 30 10 MEAN QNH PRESSURE IN HPA 1018.5 1018.6 1017.3 1020.0 1018.0 1014.1 1012.0 1012.1 1017.2 1021.2 1023.0 1020.4 1017.7 MAX. QNH PRESSURE IN HPA 1025.7 1023.7 1022.1 1026.0 1023.4 1017.7 1014.8 1017.6 1024.1 1027.4 1029.3 1029.7 1029.7 DAY 3 7 26 12 22 4 8 29 27 31 14 30 MIN. QNH PRESSURE IN HPA 1009.3 1010.3 1010.2 1007.6 1014.2 1009.7 1008.3 1008.9 1011.5 1014.8 1018.8 1012.9 1007.6 DAY 22 18 10 19 30 9 4 6 11 8 30 10 MEAN QFF PRESSURE IN HPA 1022.9 1021.2 1016.3 1014.4 1009.1 1001.0 997.3 997.5 1006.8 1015.7 1021.0 1024.6 1012.3 MAX. QFF PRESSURE IN HPA 1032.4 1030.3 1023.3 1020.4 1014.4 1007.8 1001.0 1005.6 1014.7 1023.3 1027.2 1037.8 1037.8 DAY 3 3 25 25 11 10 26 28 27 31 14 30 MIN. QFF PRESSURE IN HPA 1012.5 1010.3 1005.7 999.5 1003.1 993.2 991.6 994.3 998.6 1007.3 1016.2 1015.1 991.6 DAY 22 18 18 19 30 29 4 6 1 5 27 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 831.7 832.0 830.9 833.0 831.5 828.6 826.9 826.8 831.0 834.4 835.7 833.2 831.3 MAX. QFE PRESSURE IN HPA 838.0 836.2 836.0 839.0 835.9 831.4 829.0 831.4 836.8 839.3 840.8 841.3 841.3 DAY 3 5 25 12 22 3 8 29 27 31 14 30 MIN. QFE PRESSURE IN HPA 823.6 823.8 824.0 825.1 828.5 825.3 823.9 824.3 825.8 828.7 831.9 826.7 823.6 DAY 22 18 18 19 30 29 4 6 11 8 27 10 MEAN QNH PRESSURE IN HPA 1018.4 1018.7 1017.5 1020.0 1018.1 1014.8 1012.7 1012.6 1017.6 1021.6 1023.2 1020.2 1017.9 MAX. QNH PRESSURE IN HPA 1025.8 1023.7 1023.5 1027.0 1023.4 1018.1 1015.2 1018.1 1024.4 1027.4 1029.1 1029.7 1029.7 DAY 3 5 25 12 22 3 8 29 27 31 14 30 MIN. QNH PRESSURE IN HPA 1008.9 1009.1 1009.3 1010.6 1014.7 1010.9 1009.2 1009.7 1011.5 1014.9 1018.7 1012.5 1008.9 DAY 22 18 18 19 30 29 4 6 11 8 27 10 MEAN QFF PRESSURE IN HPA 1021.7 1019.2 1015.4 1013.2 1008.3 1001.5 997.4 997.3 1006.3 1014.5 1019.5 1022.8 1011.4 MAX. QFF PRESSURE IN HPA 1030.2 1027.4 1022.7 1019.9 1014.0 1008.2 1000.6 1004.5 1013.9 1021.3 1024.7 1036.7 1036.7 DAY 3 3 25 24 12 10 8 28 27 31 14 30 MIN. QFF PRESSURE IN HPA 1011.8 1006.7 1002.7 1002.6 1002.9 994.4 993.0 993.8 998.9 1005.8 1014.1 1012.3 993.0 DAY 22 18 18 19 30 29 4 6 11 5 27 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.6 -0.8 5.7 8.9 16.9 21.4 25.7 24.1 19.2 11.6 6.0 -1.6 11.2 MINIMUN AIR TEMPERATURE (C) -8.7 -6.3 -1.1 2.6 8.2 10.6 15.5 13.5 6.8 0.6 -0.6 -6.6 2.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 0 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 27 18 9 0 0 0 0 0 0 0 6 18 78 DAYS WITH FREEZING MIN.<= 0 31 27 21 7 0 0 0 0 0 17 19 27 149 TEMPERATURE RECORDS LOWEST(C) -18.0 -15.0 -8.0 -2.0 4.0 7.0 10.0 9.0 1.0 -3.0 -6.0 -21.0 -21.0 DAY 21 16 3 19 3 1 25 31 21 16 14 21 MAXIMUM AIR TEMPERATURE (C) 5.2 5.9 13.1 15.7 25.2 30.9 34.6 33.7 29.4 22.1 12.5 4.4 19.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 22 28 29 16 0 0 0 95 DAYS WITH MAXIMUM TEMP. <= 0 6 2 0 0 0 0 0 0 0 0 0 9 17 TEMPERATURE RECORDS HIGHEST(C) 14.0 12.0 18.0 23.0 28.0 35.0 39.0 36.0 34.0 27.0 21.0 14.0 39.0 DAY 2 21 11 28 14 15 8 16 8 16 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 13.9 12.2 14.2 13.1 17.0 20.3 19.1 20.2 22.6 21.5 13.1 11.0 16.5 MEAN DAILY TEMP. (MDT) (C) -1.7 -0.2 6.0 9.1 16.7 20.7 25.0 23.6 18.1 11.3 5.9 -1.1 11.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 25.5 131.0 86.0 10.0 0.0 0.0 0.0 252.5 HEATING DEG. DAYS(BASE 18 0C) 612.0 509.0 372.0 266.0 41.5 8.5 0.5 0.0 41.5 206.5 362.0 592.0 3011.5 DEWPOINT (MEAN C) -7.8 -7.0 -2.5 1.8 5.1 4.7 6.6 5.4 0.3 -2.2 -0.5 -6.7 -0.2 MIXING RATIO (G/KG) 2.71 2.92 4.02 5.35 6.76 6.66 7.57 6.98 4.92 4.05 4.53 3.03 4.96 VAPOUR PRESSURE (HPA) 3.62 3.86 5.34 7.07 8.94 8.75 9.94 9.18 6.54 5.39 6.04 4.02 6.56 SATURATION DEF. (HPA) 1.90 2.26 4.49 4.96 11.36 18.73 25.62 23.03 18.01 9.63 3.78 2.07 10.49 RELATIVE HUMIDITY (MEAN %) 70 66 60 65 50 37 33 33 30 42 66 70 52 RELATIVE HUMIDITY (MAX. %) 85 85 83 87 77 59 49 52 45 62 82 86 71 RELATIVE HUMIDITY (MIN. %) 50 44 38 43 28 19 20 19 18 24 48 52 34 RELATIVE HUMIDITY (MEAN% 03UTC) 81 77 77 83 74 55 45 50 40 60 80 80 67 RELATIVE HUMIDITY (MEAN% 09UTC) 59 53 48 52 35 27 24 23 22 29 55 62 41 RELATIVE HUMIDITY (MEAN% 15UTC) 65 60 49 53 36 22 25 21 22 31 59 66 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 18.2 57.2 61.5 109.7 18.7 0.0 4.0 9.0 0.0 2.3 59.5 101.4 441.5 DAYS WITH PRECIPITATION >=10 1 1 2 7 0 0 0 0 0 0 2 5 18 DAYS WITH PRECIPITATION >= 5 1 5 2 8 1 0 0 1 0 0 4 7 29 DAYS WITH PRECIPITATION >= 1 5 9 6 10 5 0 2 2 0 1 7 8 55 DAYS WITH PRECIPITATION 10 11 15 17 11 0 4 2 0 1 10 8 89 GREATEST DAILY PRECIPITATION 10.0 21.0 35.0 20.1 7.0 0.0 3.0 6.0 0.0 2.3 20.0 29.0 35.0 DAY 17 13 15 24 18 ** 30 2 ** 26 19 20 DAY WITH THUNDER STORM 0 0 0 3 2 0 1 1 0 0 0 0 7 DAYS WITH SNOW OR SLEET 7 7 3 1 0 0 0 0 0 0 0 8 26 DAYS WITH DUST 0 5 9 4 8 16 18 12 2 8 3 1 86 WIND DIRECTION (PREVAILING) 315 315 270 315 315 315 90 135 135 135 315 135 315 PREVAILING WIND SPEED(KNOTS) 8.7 9.0 12.1 10.3 7.9 9.8 11.2 10.3 9.9 7.4 7.5 10.8 8.7 PREVAILING WIND PERCENT 21.8 17.0 20.2 16.3 20.2 31.4 25.8 23.1 16.8 15.7 14.6 11.7 16.5 CALMS PERCENT OF WIND 39.9 28.6 24.6 25.0 27.8 13.8 14.5 21.1 39.5 43.1 36.7 43.1 29.8 NO. OF WIND OBSERVATION 248 224 248 240 248 239 248 247 238 248 240 248 2916 VECTOR WIND DIRECTION (MEAN) 297 254 237 228 260 290 107 145 100 226 234 230 235 VECTOR WIND MAGNITUDE(KNOTS) 1.7 5.1 4.6 3.4 2.1 4.2 4.6 2.0 1.6 1.6 1.3 2.1 1.6 WIND STEADINESES (MEAN %) 35.4 56.0 50.0 40.0 31.3 51.2 50.5 26.0 31.4 27.6 22.4 30.4 22.2 WIND SPEED (MEAN KNOTS) 4.8 9.1 9.2 8.5 6.7 8.2 9.1 7.7 5.1 5.8 5.8 6.9 7.2 FASTEST WIND DIRECTION 240 240 180 210 280 230 120 300 120 210 230 220 180 FASTEST WIND SPEED (KNOTS) 28 40 60 40 40 20 25 30 20 35 30 40 60 DAY 14 11 14 22 17 1 2 5 10 25 3 8 DAYS WITH SKY CLEAR (0-2)/8 9 4 7 4 8 29 22 27 30 27 3 9 179 DAYS WITH P.CLOUDY (3-6)/8 10 20 11 16 20 1 8 4 0 4 13 12 119 DAYS WITH CLOUDY (7-8)/8 12 4 13 10 3 0 1 0 0 0 14 10 67 DAYS WITH VISIBILITY =< 2 KM 7 5 4 1 0 1 0 1 0 2 1 7 29 DURATION OF SUNSHINE HOURS 146.4 140.3 154.8 212.8 255.4 331.7 301.7 319.6 288.3 258.8 136.2 148.0 2694.0 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 835.0 828.6 831.8 829.3 831.0 826.5 827.2 827.6 833.5 835.2 834.9 831.0 831.0 MAX. QFE PRESSURE IN HPA 844.6 836.8 838.1 835.9 835.7 831.3 832.3 831.9 839.8 840.9 843.0 841.1 844.6 DAY-HOUR 4- 6 16- 6 3- 6 29- 6 2-18 17- 6 26- 6 25- 6 23- 6 11- 6 20- 9 11- 6 MIN. QFE PRESSURE IN HPA 824.8 813.8 825.3 819.4 825.4 821.6 822.6 822.0 827.8 829.7 827.5 824.0 813.8 DAY-HOUR 13-18 13-12 15- 0 13- 3 11-15 28-15 8-15 9-15 1-12 2-15 17-18 7-15 MEAN QNH PRESSURE IN HPA 1022.3 1014.7 1018.6 1015.6 1017.5 1012.3 1013.1 1013.6 1020.6 1022.5 1022.1 1017.6 1017.5 MAX. QNH PRESSURE IN HPA 1033.6 1024.4 1026.0 1023.4 1023.1 1017.9 1019.1 1018.7 1028.0 1029.3 1031.7 1029.5 1033.6 DAY-HOUR 4- 6 16- 6 3- 6 29- 6 2-18 17- 6 26- 6 25- 6 23- 6 11- 6 20- 9 11- 6 MIN. QNH PRESSURE IN HPA 1010.3 997.3 1010.9 1003.9 1011.0 1006.5 1007.7 1007.0 1013.8 1016.1 1013.5 1009.3 997.3 DAY-HOUR 13-18 13-12 15- 0 13- 3 11-15 28-15 8-15 9-15 1-12 2-15 17-18 7-15 MEAN QFF PRESSURE IN HPA 1027.4 1018.2 1017.2 1011.7 1008.1 999.8 997.8 999.3 1010.0 1017.1 1020.6 1021.7 1012.4 MAX. QFF PRESSURE IN HPA 1039.3 1035.5 1029.8 1021.1 1018.0 1007.6 1008.5 1008.0 1020.8 1026.1 1033.6 1037.2 1039.3 DAY-HOUR 1- 6 16- 6 16- 6 20- 3 3- 3 1- 3 30-21 1- 3 24- 3 11- 3 20- 3 31-18 MIN. QFF PRESSURE IN HPA 1010.2 998.2 1007.2 996.2 1000.4 992.5 991.7 992.5 999.1 1007.8 1009.9 1008.7 991.7 DAY-HOUR 14- 0 13-12 20- 0 13- 3 11-12 27-12 8-15 9-12 5-12 5-12 17-21 7-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 835.2 828.3 831.7 829.1 830.9 826.9 827.5 828.0 833.8 835.2 834.9 831.0 831.1 MAX. QFE PRESSURE IN HPA 843.8 835.1 836.2 835.1 834.5 830.4 832.0 830.8 838.6 839.6 841.3 839.9 843.8 DAY 3 17 17 28 3 1 26 1 24 11 21 11 MIN. QFE PRESSURE IN HPA 825.0 817.0 825.3 820.4 827.1 823.8 824.7 824.0 830.1 830.8 828.1 825.4 817.0 DAY 14 13 15 14 11 29 23 10 2 9 18 20 MEAN QNH PRESSURE IN HPA 1022.6 1014.5 1018.5 1015.4 1017.5 1012.7 1013.5 1014.0 1020.9 1022.5 1022.2 1017.6 1017.7 MAX. QNH PRESSURE IN HPA 1032.7 1022.4 1023.7 1022.4 1021.7 1016.9 1018.8 1017.4 1026.6 1027.7 1029.7 1028.1 1032.7 DAY 3 17 17 28 3 1 26 1 24 11 21 11 MIN. QNH PRESSURE IN HPA 1010.5 1001.1 1010.9 1005.1 1013.0 1009.1 1010.2 1009.3 1016.5 1017.4 1014.2 1011.0 1001.1 DAY 14 13 15 14 11 29 23 10 2 9 18 20 MEAN QFF PRESSURE IN HPA 1026.5 1017.1 1016.7 1011.1 1007.8 1000.4 998.2 999.4 1009.7 1016.4 1020.1 1020.7 1012.0 MAX. QFF PRESSURE IN HPA 1037.1 1030.0 1025.5 1018.2 1015.9 1006.5 1006.6 1005.9 1018.5 1023.5 1030.4 1031.5 1037.1 DAY 1 16 17 22 3 1 31 1 24 11 21 23 MIN. QFF PRESSURE IN HPA 1010.2 1002.3 1007.2 996.8 1001.5 994.9 993.5 995.0 1001.3 1009.4 1011.7 1011.3 993.5 DAY 14 13 20 13 11 28 18 10 5 1 18 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 835.1 828.4 831.9 829.4 831.4 827.4 828.0 828.3 834.1 835.6 835.0 830.9 831.3 MAX. QFE PRESSURE IN HPA 843.7 835.2 836.7 835.4 834.7 831.0 832.2 831.2 839.0 840.0 842.0 840.0 843.7 DAY 3 16 3 28 3 17 26 21 24 11 20 11 MIN. QFE PRESSURE IN HPA 825.0 816.1 825.3 819.4 827.7 824.3 825.5 824.4 830.1 831.4 828.2 825.7 816.1 DAY 14 13 15 13 12 29 23 10 1 2 18 14 MEAN QNH PRESSURE IN HPA 1022.4 1014.5 1018.6 1015.7 1018.1 1013.3 1014.1 1014.5 1021.3 1023.0 1022.3 1017.5 1017.9 MAX. QNH PRESSURE IN HPA 1032.6 1022.5 1024.3 1022.8 1022.0 1017.6 1019.0 1017.8 1027.0 1028.2 1030.6 1028.2 1032.6 DAY 3 16 3 28 3 17 26 21 24 11 20 11 MIN. QNH PRESSURE IN HPA 1010.5 1000.0 1010.9 1003.9 1013.7 1009.7 1011.1 1009.8 1016.5 1018.1 1014.3 1011.4 1000.0 DAY 14 13 15 13 12 29 23 10 1 2 18 14 MEAN QFF PRESSURE IN HPA 1028.6 1019.0 1018.1 1012.8 1009.8 1001.7 999.6 1001.3 1012.4 1019.3 1022.0 1022.1 1013.9 MAX. QFF PRESSURE IN HPA 1037.9 1033.2 1027.4 1021.1 1018.0 1007.6 1007.0 1008.0 1020.8 1026.1 1033.6 1033.7 1037.9 DAY 1 16 16 20 3 1 31 1 24 11 20 22 MIN. QFF PRESSURE IN HPA 1012.8 1002.6 1007.7 996.2 1003.3 996.5 995.1 995.6 1004.5 1012.4 1012.3 1012.3 995.1 DAY 14 13 20 13 11 28 9 10 6 2 18 7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION HAMEDAN NOZHEH (40767) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 12 N LONGITUDE 48 43 E DATA PROCESSING CENTER ELEVATION 1679.7 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 836.1 829.4 832.8 830.2 832.0 827.6 828.4 828.7 834.8 836.4 835.9 831.7 832.0 MAX. QFE PRESSURE IN HPA 844.6 836.8 838.1 835.9 835.6 831.3 832.3 831.9 839.8 840.9 842.9 841.1 844.6 DAY 4 16 3 29 4 17 26 25 23 11 20 11 MIN. QFE PRESSURE IN HPA 827.2 815.1 826.1 820.7 828.1 824.4 825.8 824.5 830.6 832.2 828.8 826.9 815.1 DAY 14 13 20 13 12 28 23 10 2 2 18 14 MEAN QNH PRESSURE IN HPA 1023.6 1015.7 1019.7 1016.7 1018.8 1013.6 1014.5 1014.9 1022.1 1024.0 1023.3 1018.4 1018.8 MAX. QNH PRESSURE IN HPA 1033.6 1024.4 1026.0 1023.4 1023.0 1017.9 1019.1 1018.7 1028.0 1029.3 1031.6 1029.5 1033.6 DAY 4 16 3 29 4 17 26 25 23 11 20 11 MIN. QNH PRESSURE IN HPA 1013.1 998.9 1011.8 1005.5 1014.2 1009.8 1011.5 1009.9 1017.1 1019.0 1015.0 1012.8 998.9 DAY 14 13 20 13 12 28 23 10 2 2 18 14 MEAN QFF PRESSURE IN HPA 1030.1 1020.0 1018.7 1013.0 1009.3 1001.0 999.0 1000.9 1011.5 1018.8 1022.0 1023.0 1013.9 MAX. QFF PRESSURE IN HPA 1039.3 1035.5 1029.8 1020.8 1017.5 1006.4 1007.5 1006.6 1019.7 1025.6 1033.0 1036.9 1039.3 DAY 1 16 16 20 3 1 31 1 23 11 20 22 MIN. QFF PRESSURE IN HPA 1015.2 1000.8 1008.5 998.9 1003.1 996.1 994.6 995.6 1004.8 1011.2 1012.9 1013.0 994.6 DAY 14 13 20 13 12 28 17 10 2 2 18 7 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 835.3 829.0 832.3 829.8 831.4 826.9 827.6 827.9 834.1 835.5 835.1 831.3 831.4 MAX. QFE PRESSURE IN HPA 844.2 836.4 837.5 835.6 835.4 830.3 831.4 830.8 839.2 839.8 843.0 840.3 844.2 DAY 3 16 3 28 4 17 26 21 23 13 20 11 MIN. QFE PRESSURE IN HPA 826.2 814.0 825.6 822.8 827.7 823.6 825.0 824.0 829.9 831.3 828.3 825.4 814.0 DAY 13 13 20 14 11 28 8 10 2 2 18 7 MEAN QNH PRESSURE IN HPA 1022.7 1015.2 1019.1 1016.2 1018.1 1012.8 1013.6 1014.0 1021.2 1022.9 1022.5 1017.9 1018.0 MAX. QNH PRESSURE IN HPA 1033.2 1024.0 1025.3 1023.0 1022.8 1016.8 1018.1 1017.4 1027.3 1028.0 1031.7 1028.6 1033.2 DAY 3 16 3 28 4 17 26 21 23 13 20 11 MIN. QNH PRESSURE IN HPA 1011.9 997.6 1011.2 1007.9 1013.7 1008.9 1010.5 1009.3 1016.3 1017.9 1014.4 1011.0 997.6 DAY 13 13 20 14 11 28 8 10 2 2 18 7 MEAN QFF PRESSURE IN HPA 1026.7 1017.9 1017.0 1011.7 1007.9 999.7 997.6 999.0 1009.5 1016.5 1019.9 1021.6 1012.1 MAX. QFF PRESSURE IN HPA 1034.7 1031.5 1028.7 1019.0 1016.0 1004.0 1007.4 1004.6 1017.8 1023.4 1031.2 1035.5 1035.5 DAY 25 16 16 20 3 1 31 1 23 31 20 22 MIN. QFF PRESSURE IN HPA 1013.0 999.0 1007.5 1002.8 1002.3 993.8 993.1 994.6 1002.2 1009.9 1012.6 1010.8 993.1 DAY 14 13 20 13 11 28 17 10 6 2 18 7 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 834.1 827.9 831.1 828.5 830.0 825.4 826.1 826.2 832.3 834.1 833.9 830.3 830.0 MAX. QFE PRESSURE IN HPA 842.8 835.3 837.4 834.0 833.7 828.4 830.2 829.0 837.7 837.9 841.6 838.7 842.8 DAY 4 16 17 27 4 17 25 21 23 31 20 11 MIN. QFE PRESSURE IN HPA 825.0 813.8 826.0 822.3 826.0 822.2 823.3 822.5 827.8 829.9 828.0 824.5 813.8 DAY 14 13 14 13 11 27 8 9 1 8 17 7 MEAN QNH PRESSURE IN HPA 1021.2 1013.9 1017.7 1014.7 1016.5 1011.0 1011.8 1012.0 1019.1 1021.2 1021.0 1016.8 1016.4 MAX. QNH PRESSURE IN HPA 1031.5 1022.7 1025.1 1021.1 1020.8 1014.5 1016.7 1015.2 1025.5 1025.7 1030.1 1026.7 1031.5 DAY 4 16 17 27 4 17 25 21 23 31 20 11 MIN. QNH PRESSURE IN HPA 1010.5 997.3 1011.7 1007.3 1011.7 1007.2 1008.5 1007.6 1013.8 1016.3 1014.1 1009.9 997.3 DAY 14 13 14 13 11 27 8 9 1 8 17 7 MEAN QFF PRESSURE IN HPA 1024.8 1016.3 1015.8 1010.2 1006.7 998.5 996.4 997.1 1007.9 1015.0 1018.8 1020.0 1010.6 MAX. QFF PRESSURE IN HPA 1032.4 1030.1 1027.6 1016