STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.3 8.7 14.6 22.0 29.2 33.8 35.9 32.4 28.4 20.9 14.9 9.2 21.3 MINIMUN AIR TEMPERATURE (C) -1.1 0.9 6.4 12.1 17.5 20.5 25.1 21.0 16.8 9.1 3.8 0.7 11.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 4 10 31 17 5 0 0 0 68 DAYS WITH MINIMUM TEMP. <=-4 10 4 0 0 0 0 0 0 0 0 1 3 18 DAYS WITH FREEZING MIN.<= 0 19 11 1 0 0 0 0 0 0 0 9 11 51 TEMPERATURE RECORDS LOWEST(C) -7.0 -7.8 0.0 2.2 13.0 16.6 21.0 14.0 9.0 4.6 -4.4 -8.0 -8.0 DAY 3 8 7 4 8 8 25 28 29 4 16 31 MAXIMUM AIR TEMPERATURE (C) 12.8 14.4 20.6 28.3 35.1 39.7 41.7 38.7 35.7 28.8 23.1 16.3 27.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 16 29 30 31 31 28 11 2 0 179 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.5 23.2 31.4 35.6 41.5 45.5 45.2 43.0 42.5 33.0 30.5 21.0 45.5 DAY 29 2 21 23 28 16 2 5 6 21 11 27 DIF. BETWEEN (MAX.-MIN.) (C) 13.9 13.5 14.2 16.2 17.6 19.2 16.6 17.7 18.9 19.7 19.3 15.6 16.8 MEAN DAILY TEMP. (MDT) (C) 5.8 7.7 13.5 20.2 26.3 30.1 33.4 29.9 26.3 19.0 13.4 8.5 19.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 47.5 164.1 272.9 385.1 274.8 161.6 1.6 0.0 0.0 1307.7 HEATING DEG. DAYS(BASE 18 0C) 377.1 299.6 144.3 36.9 0.0 0.0 0.0 0.0 0.0 11.3 140.2 293.5 1302.8 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. 2.1 26.5 58.2 26.2 0.3 0.0 1.2 0.0 0.0 0.5 0.0 8.7 123.7 DAYS WITH PRECIPITATION >=10 0 1 3 1 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 0 3 4 2 0 0 0 0 0 0 0 1 10 DAYS WITH PRECIPITATION >= 1 1 6 5 3 0 0 1 0 0 0 0 1 17 DAYS WITH PRECIPITATION 2 7 7 5 1 0 2 0 0 1 0 5 30 GREATEST DAILY PRECIPITATION 2.0 10.0 27.0 20.0 0.3 0.0 1.0 0.0 0.0 0.5 0.0 7.0 27.0 DAY 17 25 24 26 3 ** 28 ** ** 16 ** 20 DAY WITH THUNDER STORM 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 0 1 2 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 2 1 3 2 0 1 1 0 0 0 0 10 WIND DIRECTION (PREVAILING) 315 315 360 360 315 315 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 6.3 6.1 7.5 5.5 6.8 7.3 5.4 5.8 6.8 5.4 5.0 5.4 6.3 PREVAILING WIND PERCENT 15.3 15.9 15.5 22.0 33.5 23.3 21.3 24.5 34.7 16.8 13.3 4.5 19.4 CALMS PERCENT OF WIND 80.6 71.0 51.0 43.3 29.7 47.3 43.9 43.2 38.7 69.7 74.7 86.5 56.2 NO. OF WIND OBSERVATION 124 145 155 150 155 150 155 155 150 155 150 155 1799 VECTOR WIND DIRECTION (MEAN) 321 291 328 333 327 343 355 342 333 331 325 294 334 VECTOR WIND MAGNITUDE(KNOTS) 1.1 0.6 1.8 1.9 3.4 2.6 2.4 2.6 3.5 1.3 0.9 0.4 1.8 WIND STEADINESES (MEAN %) 91.7 23.1 51.4 57.6 79.1 81.2 72.7 81.2 92.1 86.7 75.0 50.0 66.7 WIND SPEED (MEAN KNOTS) 1.2 2.6 3.5 3.3 4.3 3.2 3.3 3.2 3.8 1.5 1.2 0.8 2.7 FASTEST WIND DIRECTION 320 180 180 240 300 300 360 60 330 330 360 210 180 FASTEST WIND SPEED (KNOTS) 14 43 16 39 17 16 12 10 16 12 10 14 43 DAY 2 3 23 26 30 18 31 7 15 22 15 27 DAYS WITH SKY CLEAR (0-2)/8 11 11 16 8 24 26 22 27 29 27 20 19 240 DAYS WITH P.CLOUDY (3-6)/8 15 12 7 17 7 4 8 4 1 4 9 10 98 DAYS WITH CLOUDY (7-8)/8 5 6 8 5 0 0 1 0 0 0 1 2 28 DAYS WITH VISIBILITY =< 2 KM 0 1 0 0 2 0 0 0 0 0 0 1 4 DURATION OF SUNSHINE HOURS 184.8 174.5 234.2 231.8 353.3 351.4 355.2 346.8 296.6 277.7 225.2 190.2 3221.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 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 BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 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 BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 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 BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.9 4.4 14.5 21.6 26.4 33.9 35.0 31.5 27.4 21.7 13.4 8.9 20.1 MINIMUN AIR TEMPERATURE (C) -3.9 -2.5 6.4 11.2 15.5 21.9 24.1 19.8 15.2 10.5 4.5 1.1 10.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 6 21 29 7 1 0 0 0 64 DAYS WITH MINIMUM TEMP. <=-4 16 10 0 0 0 0 0 0 0 0 0 1 27 DAYS WITH FREEZING MIN.<= 0 28 22 1 0 0 0 0 0 0 0 4 18 73 TEMPERATURE RECORDS LOWEST(C) -8.6 -8.6 0.0 2.2 5.6 17.4 18.5 15.5 9.0 6.0 -1.0 -4.0 -8.6 DAY 31 5 1 1 2 9 31 22 25 17 24 9 MAXIMUM AIR TEMPERATURE (C) 8.4 9.7 20.2 27.6 32.5 39.8 40.5 37.7 35.2 29.5 20.2 15.3 26.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 11 21 30 31 31 26 14 0 0 164 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.0 16.0 26.6 33.0 40.5 43.6 45.8 40.8 41.6 36.0 24.6 24.4 45.8 DAY 1 28 26 29 29 25 8 11 14 9 20 1 DIF. BETWEEN (MAX.-MIN.) (C) 12.3 12.2 13.8 16.4 17.0 17.9 16.4 17.9 20.0 19.0 15.7 14.2 16.1 MEAN DAILY TEMP. (MDT) (C) 2.3 3.6 13.3 19.4 24.0 30.8 32.3 28.8 25.2 20.0 12.4 8.2 18.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 20.4 123.2 295.5 350.7 240.9 132.9 25.2 0.0 0.0 1188.8 HEATING DEG. DAYS(BASE 18 0C) 487.9 402.0 149.4 29.1 12.1 0.0 0.0 0.0 0.0 10.3 169.7 304.2 1564.6 DEWPOINT (MEAN C) ***** ***** ***** ***** ***** 8.4 9.3 6.0 3.3 0.7 0.8 -0.2 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** 7.76 8.30 6.67 5.50 4.50 4.62 4.31 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** 11.18 11.94 9.64 7.98 6.59 6.77 6.30 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** 44.25 46.72 38.88 31.47 21.75 9.49 5.96 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** 22 22 22 23 27 46 57 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** 33 33 37 34 42 68 79 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** 16 17 15 15 18 30 38 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** 33 33 37 34 42 66 77 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** 18 18 17 18 20 38 44 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** 19 18 19 22 26 44 57 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 8.5 19.4 8.4 0.3 1.2 3.0 0.0 0.0 0.0 0.0 3.2 11.9 55.9 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 0 1 1 0 0 0 0 0 0 0 0 1 3 DAYS WITH PRECIPITATION >= 1 3 5 2 0 0 1 0 0 0 0 2 4 17 DAYS WITH PRECIPITATION 10 7 5 1 2 1 0 0 0 0 4 6 36 GREATEST DAILY PRECIPITATION 3.4 14.0 5.2 0.3 0.7 3.0 0.0 0.0 0.0 0.0 1.6 5.0 14.0 DAY 3 23 19 30 8 8 ** ** ** ** 17 16 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH SNOW OR SLEET 2 2 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH DUST 0 0 1 4 0 4 11 3 3 2 0 1 29 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 45 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 5.4 5.3 5.7 5.2 6.2 6.2 6.2 5.5 7.0 5.9 4.5 4.8 5.7 PREVAILING WIND PERCENT 21.3 23.6 22.6 20.7 29.0 18.0 20.0 22.6 18.0 17.4 10.0 3.2 18.6 CALMS PERCENT OF WIND 69.0 55.0 49.7 52.0 41.9 52.0 45.8 45.2 62.7 70.3 84.0 91.6 59.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 328 332 321 338 337 352 12 350 335 332 328 268 340 VECTOR WIND MAGNITUDE(KNOTS) 1.4 2.1 1.7 2.0 2.7 1.6 2.3 2.4 2.1 1.6 0.7 0.2 1.7 WIND STEADINESES (MEAN %) 87.5 95.5 60.7 80.0 81.8 59.3 74.2 80.0 91.3 94.1 100.0 33.3 77.3 WIND SPEED (MEAN KNOTS) 1.6 2.2 2.8 2.5 3.3 2.7 3.1 3.0 2.3 1.7 0.7 0.6 2.2 FASTEST WIND DIRECTION 350 330 330 330 330 60 30 320 330 320 340 210 330 FASTEST WIND SPEED (KNOTS) 8 12 19 10 12 19 12 12 16 12 8 14 19 DAY 15 25 30 22 15 6 23 19 19 11 3 5 DAYS WITH SKY CLEAR (0-2)/8 21 12 16 15 22 26 29 30 30 28 22 18 269 DAYS WITH P.CLOUDY (3-6)/8 7 12 12 12 7 4 2 1 0 2 7 11 77 DAYS WITH CLOUDY (7-8)/8 3 4 3 3 2 0 0 0 0 1 1 2 19 DAYS WITH VISIBILITY =< 2 KM 0 1 0 0 0 0 1 0 3 1 0 1 7 DURATION OF SUNSHINE HOURS 205.2 184.6 229.7 270.8 336.8 339.8 331.4 355.2 292.2 279.8 ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 907.9 907.6 908.9 911.3 916.9 919.0 917.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 912.2 913.3 913.8 923.4 925.1 924.0 923.2 ****** DAY-HOUR **-** **-** **-** **-** **-** 2- 6 20- 3 19- 6 24- 6 27- 6 8- 6 18- 6 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 901.9 902.6 901.9 903.4 908.8 913.2 906.4 ****** DAY-HOUR **-** **-** **-** **-** **-** 10-15 6-15 1-15 12-15 1-15 20-12 5-12 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1009.2 1008.8 1010.2 1012.9 1019.0 1021.2 1019.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1013.9 1015.1 1015.6 1026.1 1027.9 1026.7 1025.9 ****** DAY-HOUR **-** **-** **-** **-** **-** 2- 6 20- 3 19- 6 24- 6 27- 6 8- 6 18- 6 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1002.7 1003.4 1002.7 1004.3 1010.2 1015.0 1007.6 ****** DAY-HOUR **-** **-** **-** **-** **-** 10-15 6-15 1-15 12-15 1-15 20-12 5-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 909.2 909.1 910.0 912.4 917.7 919.3 917.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 911.5 913.3 913.1 922.4 924.7 922.8 921.8 ****** DAY ** ** ** ** ** 2 20 20 23 27 10 19 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 905.1 905.3 904.3 905.9 909.7 913.9 909.6 ****** DAY ** ** ** ** ** 11 7 2 14 2 20 5 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1010.6 1010.5 1011.4 1014.1 1019.9 1021.6 1019.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1013.1 1015.1 1014.9 1025.0 1027.5 1025.4 1024.3 ****** DAY ** ** ** ** ** 2 20 20 23 27 10 19 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1006.2 1006.4 1005.3 1007.0 1011.2 1015.7 1011.1 ****** DAY ** ** ** ** ** 11 7 2 14 2 20 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1002.9 1002.4 1004.7 1009.0 1017.1 1021.5 1021.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1005.7 1006.9 1008.4 1022.3 1026.2 1026.8 1026.7 ****** DAY ** ** ** ** ** 2 20 20 24 27 26 19 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 998.0 997.9 999.2 1000.8 1007.3 1014.6 1008.5 ****** DAY ** ** ** ** ** 11 7 2 14 2 17 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 909.5 909.2 910.6 913.1 918.6 920.6 918.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 912.2 912.9 913.8 923.4 925.1 924.0 923.2 ****** DAY ** ** ** ** ** 2 20 19 24 27 8 18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 906.3 906.2 905.5 907.2 910.8 915.6 910.0 ****** DAY ** ** ** ** ** 11 7 2 14 2 20 5 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1010.9 1010.7 1012.1 1014.9 1020.9 1023.0 1021.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1013.9 1014.7 1015.6 1026.1 1027.9 1026.7 1025.9 ****** DAY ** ** ** ** ** 2 20 19 24 27 8 18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1007.5 1007.3 1006.6 1008.4 1012.4 1017.6 1011.5 ****** DAY ** ** ** ** ** 11 7 2 14 2 20 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 908.1 907.7 909.2 911.5 917.0 918.9 916.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 911.2 911.3 912.0 922.1 924.0 922.4 922.2 ****** DAY ** ** ** ** ** 2 20 19 23 27 8 18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 904.4 904.6 904.5 905.4 910.1 914.0 906.9 ****** DAY ** ** ** ** ** 10 7 2 14 2 20 5 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1009.4 1009.0 1010.6 1013.1 1019.1 1021.2 1019.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1012.8 1012.9 1013.7 1024.7 1026.7 1025.0 1024.8 ****** DAY ** ** ** ** ** 2 20 19 23 27 8 18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1005.4 1005.6 1005.5 1006.5 1011.6 1015.8 1008.1 ****** DAY ** ** ** ** ** 10 7 2 14 2 20 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 906.5 906.0 907.5 909.8 915.5 917.7 915.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 909.0 909.3 910.8 920.7 922.5 921.2 921.2 ****** DAY ** ** ** ** ** 2 20 19 23 27 8 18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 902.3 903.0 902.1 903.5 909.3 913.2 906.4 ****** DAY ** ** ** ** ** 10 7 1 12 1 20 5 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1007.7 1007.2 1008.7 1011.2 1017.5 1019.9 1017.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1010.4 1010.7 1012.4 1023.1 1025.1 1023.7 1023.7 ****** DAY ** ** ** ** ** 2 20 19 23 27 8 18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1003.1 1003.9 1002.9 1004.4 1010.7 1015.0 1007.6 ****** DAY ** ** ** ** ** 10 7 1 12 1 20 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 906.2 905.8 907.2 909.7 915.8 918.4 916.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 908.8 908.8 910.5 921.1 922.7 922.1 922.5 ****** DAY ** ** ** ** ** 2 10 19 23 27 8 18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 901.9 902.6 901.9 903.4 908.8 914.8 910.4 ****** DAY ** ** ** ** ** 10 6 1 12 1 16 5 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1007.3 1006.9 1008.4 1011.2 1017.8 1020.6 1018.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1010.2 1010.2 1012.0 1023.6 1025.3 1024.7 1025.1 ****** DAY ** ** ** ** ** 2 10 19 23 27 8 18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1002.7 1003.4 1002.7 1004.3 1010.2 1016.7 1011.9 ****** DAY ** ** ** ** ** 10 6 1 12 1 16 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 999.5 998.7 1001.6 1006.0 1015.0 1020.5 1020.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1002.8 1002.0 1005.8 1021.0 1023.8 1024.2 1027.3 ****** DAY ** ** ** ** ** 2 19 31 23 27 23 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 994.9 994.6 996.5 997.9 1005.9 1015.1 1009.6 ****** DAY ** ** ** ** ** 10 7 1 12 1 16 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.7 7.7 14.1 21.3 29.8 34.3 33.9 33.3 28.2 20.6 14.6 7.2 20.8 MINIMUN AIR TEMPERATURE (C) 0.1 1.4 4.7 11.3 19.0 21.5 23.1 21.7 16.0 9.6 4.1 -0.2 11.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 6 19 26 19 3 0 0 0 75 DAYS WITH MINIMUM TEMP. <=-4 3 0 0 0 0 0 0 0 0 0 0 5 8 DAYS WITH FREEZING MIN.<= 0 14 12 5 0 0 0 0 0 0 0 7 13 51 TEMPERATURE RECORDS LOWEST(C) -5.0 -2.6 -3.6 5.2 14.5 16.6 19.2 15.4 9.4 1.8 -1.8 -6.6 -6.6 DAY 27 1 22 12 14 2 11 6 21 20 20 30 MAXIMUM AIR TEMPERATURE (C) 9.0 12.9 20.6 27.2 36.1 40.3 40.0 40.4 36.3 28.1 22.6 13.3 27.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 9 30 30 31 31 30 12 0 0 174 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.0 22.0 31.4 37.0 40.8 45.5 42.6 44.6 41.6 33.6 29.6 21.6 45.5 DAY 24 20 14 29 22 28 24 10 2 1 10 3 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 11.5 15.9 15.9 17.1 18.8 16.9 18.7 20.3 18.5 18.5 13.5 16.2 MEAN DAILY TEMP. (MDT) (C) 4.6 7.2 12.6 19.2 27.6 30.9 31.5 31.0 26.1 18.9 13.3 6.5 19.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.6 25.2 203.1 297.1 326.3 311.4 154.0 12.5 0.0 0.0 1330.3 HEATING DEG. DAYS(BASE 18 0C) 416.7 303.6 173.7 24.3 0.0 0.0 0.0 0.0 0.0 28.2 140.7 355.9 1443.0 DEWPOINT (MEAN C) -0.0 1.6 -0.3 3.3 7.5 8.4 8.1 6.1 1.6 -0.7 -2.2 -2.4 2.6 MIXING RATIO (G/KG) 4.29 4.81 4.22 5.50 7.22 7.77 7.62 6.65 4.90 4.14 3.64 3.59 5.36 VAPOUR PRESSURE (HPA) 6.29 7.01 6.17 7.98 10.44 11.18 10.95 9.60 7.12 6.06 5.35 5.27 7.78 SATURATION DEF. (HPA) 2.55 4.03 11.31 19.15 33.66 45.88 44.18 44.52 34.22 20.19 12.90 5.70 23.19 RELATIVE HUMIDITY (MEAN %) 74 69 41 34 26 22 22 20 20 27 34 54 37 RELATIVE HUMIDITY (MAX. %) 92 92 68 57 41 34 34 33 32 43 52 71 54 RELATIVE HUMIDITY (MIN. %) 55 50 26 21 19 15 15 13 12 15 22 39 25 RELATIVE HUMIDITY (MEAN% 03UTC) 90 91 67 57 41 34 34 33 32 43 52 71 54 RELATIVE HUMIDITY (MEAN% 09UTC) 66 59 31 24 21 18 18 16 15 18 24 45 30 RELATIVE HUMIDITY (MEAN% 15UTC) 74 63 36 29 22 18 17 15 17 27 34 54 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.3 33.6 18.1 0.2 0.8 0.0 0.0 0.0 0.0 0.0 0.0 16.0 108.0 DAYS WITH PRECIPITATION >=10 1 0 1 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 2 4 2 0 0 0 0 0 0 0 0 2 10 DAYS WITH PRECIPITATION >= 1 9 7 2 0 0 0 0 0 0 0 0 3 21 DAYS WITH PRECIPITATION 9 10 3 2 1 0 0 0 0 1 0 3 29 GREATEST DAILY PRECIPITATION 14.0 7.0 11.0 0.1 0.8 0.0 0.0 0.0 0.0 0.0 0.0 9.0 14.0 DAY 2 3 26 4 12 ** ** ** ** ** ** 22 DAY WITH THUNDER STORM 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 0 6 2 4 2 5 4 2 3 0 0 28 WIND DIRECTION (PREVAILING) 315 315 315 315 315 45 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 9.1 6.0 7.7 6.3 6.4 5.0 4.8 5.5 4.8 7.5 5.4 6.8 6.2 PREVAILING WIND PERCENT 4.5 13.6 22.6 28.0 37.4 15.3 20.6 16.8 29.3 12.9 4.7 8.4 17.5 CALMS PERCENT OF WIND 94.2 72.9 53.5 54.0 29.0 52.7 43.2 56.8 54.7 71.0 95.3 89.7 63.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 324 332 328 324 334 360 8 349 336 337 320 312 338 VECTOR WIND MAGNITUDE(KNOTS) 0.5 1.3 2.7 1.9 3.5 1.6 2.0 1.8 1.7 1.5 0.2 0.6 1.6 WIND STEADINESES (MEAN %) 100.0 86.7 84.4 73.1 85.4 64.0 64.5 78.3 77.3 83.3 66.7 85.7 76.2 WIND SPEED (MEAN KNOTS) 0.5 1.5 3.2 2.6 4.1 2.5 3.1 2.3 2.2 1.8 0.3 0.7 2.1 FASTEST WIND DIRECTION 300 330 270 300 320 360 60 330 60 320 320 320 270 FASTEST WIND SPEED (KNOTS) 12 12 19 19 19 12 16 10 10 14 10 12 19 DAY 26 11 14 7 13 7 18 1 16 5 14 25 DAYS WITH SKY CLEAR (0-2)/8 12 11 20 9 26 28 27 30 30 26 23 15 257 DAYS WITH P.CLOUDY (3-6)/8 9 11 7 16 4 2 3 1 0 5 6 14 78 DAYS WITH CLOUDY (7-8)/8 10 6 4 5 1 0 1 0 0 0 1 2 30 DAYS WITH VISIBILITY =< 2 KM 1 1 4 0 1 2 5 1 0 3 0 0 18 DURATION OF SUNSHINE HOURS 136.0 157.5 207.2 170.2 ****** ****** ****** ****** ****** ****** ****** 157.8 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 918.1 914.7 916.6 911.5 909.9 906.7 906.0 907.8 911.1 917.0 919.2 918.8 913.1 MAX. QFE PRESSURE IN HPA 927.3 926.0 927.8 918.3 918.5 913.7 912.1 913.0 917.3 927.8 928.2 928.7 928.7 DAY-HOUR 27- 6 8- 6 10- 6 25- 6 16- 6 1- 3 15- 6 3- 6 28- 6 19- 6 23- 6 28- 6 MIN. QFE PRESSURE IN HPA 911.3 904.0 907.9 901.6 899.4 899.7 897.6 902.3 904.5 909.0 909.8 906.2 897.6 DAY-HOUR 2- 3 16- 3 14-15 15-15 13- 9 27-15 4-15 8-15 2-15 2-12 1-12 25-12 MEAN QNH PRESSURE IN HPA 1020.3 1016.7 1018.6 1013.1 1011.4 1007.9 1007.1 1009.1 1012.7 1019.1 1021.5 1021.0 1014.9 MAX. QNH PRESSURE IN HPA 1030.3 1028.9 1030.9 1020.5 1020.8 1015.5 1013.8 1014.8 1019.4 1030.9 1031.3 1031.9 1031.9 DAY-HOUR 27- 6 8- 6 10- 6 25- 6 16- 6 1- 3 15- 6 3- 6 28- 6 19- 6 23- 6 28- 6 MIN. QNH PRESSURE IN HPA 1012.9 1005.0 1009.2 1002.3 999.9 1000.3 998.0 1003.1 1005.5 1010.4 1011.3 1007.3 998.0 DAY-HOUR 2- 3 16- 3 14-15 15-15 13- 9 27-15 4-15 8-15 2-15 2-12 1-12 25-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 918.0 915.0 917.1 912.3 911.2 908.1 907.5 909.2 912.1 917.6 919.6 919.0 913.9 MAX. QFE PRESSURE IN HPA 925.8 924.4 926.6 917.6 918.1 913.7 911.5 912.7 916.4 926.7 926.9 926.8 926.9 DAY 27 8 10 24 16 1 17 3 28 19 23 28 MIN. QFE PRESSURE IN HPA 911.3 904.0 908.8 903.4 900.7 904.0 901.5 905.7 908.4 912.0 910.9 911.9 900.7 DAY 2 16 25 16 13 27 5 8 3 2 1 25 MEAN QNH PRESSURE IN HPA 1020.2 1017.0 1019.2 1014.0 1012.7 1009.5 1008.7 1010.6 1013.8 1019.8 1021.9 1021.3 1015.7 MAX. QNH PRESSURE IN HPA 1028.7 1027.2 1029.6 1019.8 1020.3 1015.5 1013.1 1014.4 1018.5 1029.7 1029.9 1029.8 1029.9 DAY 27 8 10 24 16 1 17 3 28 19 23 28 MIN. QNH PRESSURE IN HPA 1012.9 1005.0 1010.2 1004.3 1001.4 1005.0 1002.2 1006.8 1009.7 1013.7 1012.5 1013.6 1001.4 DAY 2 16 25 16 13 27 5 8 3 2 1 25 MEAN QFF PRESSURE IN HPA 1022.6 1018.5 1018.7 1010.7 1006.4 1001.8 1000.9 1003.1 1008.4 1017.3 1021.8 1023.5 1012.8 MAX. QFF PRESSURE IN HPA 1032.9 1029.8 1029.4 1017.0 1015.4 1009.7 1005.3 1007.7 1014.7 1028.6 1029.8 1034.7 1034.7 DAY 27 8 10 8 16 1 15 3 28 19 23 28 MIN. QFF PRESSURE IN HPA 1013.0 1004.7 1007.4 999.5 992.9 996.2 993.5 999.5 1001.9 1009.6 1010.2 1015.2 992.9 DAY 2 16 25 16 13 28 5 8 3 2 1 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 919.6 916.3 918.4 913.1 911.7 908.5 907.7 909.8 913.1 918.9 920.9 920.3 914.9 MAX. QFE PRESSURE IN HPA 927.3 926.0 927.8 918.3 918.5 913.7 912.1 913.0 917.3 927.8 928.2 928.7 928.7 DAY 27 8 10 25 16 1 15 3 28 19 23 28 MIN. QFE PRESSURE IN HPA 913.1 905.8 910.3 905.0 900.7 904.1 902.0 906.3 909.2 913.2 912.6 910.6 900.7 DAY 2 16 25 16 13 27 5 8 3 2 1 25 MEAN QNH PRESSURE IN HPA 1021.9 1018.3 1020.6 1014.8 1013.4 1009.9 1009.0 1011.3 1014.8 1021.2 1023.3 1022.7 1016.8 MAX. QNH PRESSURE IN HPA 1030.3 1028.9 1030.9 1020.5 1020.8 1015.5 1013.8 1014.8 1019.4 1030.9 1031.3 1031.9 1031.9 DAY 27 8 10 25 16 1 15 3 28 19 23 28 MIN. QNH PRESSURE IN HPA 1014.9 1006.9 1011.8 1006.0 1001.4 1005.1 1002.8 1007.5 1010.6 1015.0 1014.3 1012.1 1001.4 DAY 2 16 25 16 13 27 5 8 3 2 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 918.3 915.1 917.0 911.8 910.2 907.1 906.3 908.2 911.4 917.1 919.1 918.7 913.4 MAX. QFE PRESSURE IN HPA 925.7 924.6 926.3 917.2 916.5 911.8 911.1 911.7 915.6 926.1 926.5 927.3 927.3 DAY 27 8 10 24 16 1 15 3 26 19 23 28 MIN. QFE PRESSURE IN HPA 912.3 905.1 909.5 904.3 899.4 902.5 900.7 904.6 907.1 910.8 911.1 907.6 899.4 DAY 2 16 25 16 13 27 5 8 2 2 1 25 MEAN QNH PRESSURE IN HPA 1020.5 1017.0 1019.1 1013.5 1011.7 1008.3 1007.5 1009.5 1013.0 1019.2 1021.4 1021.0 1015.1 MAX. QNH PRESSURE IN HPA 1028.6 1027.4 1029.3 1019.3 1018.6 1013.5 1012.7 1013.3 1017.6 1029.0 1029.5 1030.3 1030.3 DAY 27 8 10 24 16 1 15 3 26 19 23 28 MIN. QNH PRESSURE IN HPA 1014.0 1006.2 1010.9 1005.3 999.9 1003.3 1001.4 1005.6 1008.3 1012.4 1012.7 1008.9 999.9 DAY 2 16 25 16 13 27 5 8 2 2 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 917.0 913.4 915.1 910.1 908.3 905.2 904.5 906.1 909.4 915.6 917.8 917.5 911.7 MAX. QFE PRESSURE IN HPA 924.9 922.6 923.8 916.0 914.5 910.0 909.6 909.1 913.7 924.4 925.3 925.9 925.9 DAY 26 8 10 24 16 1 15 4 26 19 23 28 MIN. QFE PRESSURE IN HPA 911.4 905.8 908.2 902.7 900.0 900.5 898.9 902.7 904.9 909.0 909.8 906.2 898.9 DAY 23 16 14 16 13 27 5 8 2 2 1 25 MEAN QNH PRESSURE IN HPA 1019.2 1015.2 1017.0 1011.6 1009.6 1006.3 1005.4 1007.2 1010.9 1017.6 1020.0 1019.7 1013.3 MAX. QNH PRESSURE IN HPA 1027.7 1025.2 1026.5 1018.0 1016.4 1011.5 1011.1 1010.5 1015.5 1027.2 1028.2 1028.8 1028.8 DAY 26 8 10 24 16 1 15 4 26 19 23 28 MIN. QNH PRESSURE IN HPA 1013.0 1006.9 1009.5 1003.5 1000.6 1001.1 999.4 1003.5 1005.9 1010.4 1011.3 1007.3 999.4 DAY 23 16 14 16 13 27 5 8 2 2 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 917.7 913.9 915.3 910.1 908.3 904.8 903.9 905.7 909.4 916.0 918.5 918.4 911.8 MAX. QFE PRESSURE IN HPA 925.7 922.7 923.3 916.0 914.5 909.5 909.2 909.0 913.9 924.5 925.8 926.3 926.3 DAY 26 8 10 24 15 1 15 4 26 18 22 28 MIN. QFE PRESSURE IN HPA 911.9 905.9 907.9 901.6 899.8 899.7 897.6 902.3 904.5 909.3 910.4 907.4 897.6 DAY 17 15 14 15 12 27 4 8 2 14 1 25 MEAN QNH PRESSURE IN HPA 1019.9 1015.7 1017.3 1011.6 1009.6 1005.8 1004.9 1006.8 1010.8 1018.1 1020.8 1020.6 1013.5 MAX. QNH PRESSURE IN HPA 1028.6 1025.3 1026.0 1018.0 1016.4 1010.9 1010.6 1010.4 1015.7 1027.3 1028.7 1029.3 1029.3 DAY 26 8 10 24 15 1 15 4 26 18 22 28 MIN. QNH PRESSURE IN HPA 1013.6 1007.0 1009.2 1002.3 1000.4 1000.3 998.0 1003.1 1005.5 1010.7 1011.9 1008.7 998.0 DAY 17 15 14 15 12 27 4 8 2 14 1 25 MEAN QFF PRESSURE IN HPA 1022.3 1017.1 1016.7 1008.2 1003.1 998.0 997.0 999.3 1005.4 1015.5 1020.6 1022.7 1010.5 MAX. QFF PRESSURE IN HPA 1031.5 1028.0 1026.8 1015.2 1011.2 1004.9 1003.2 1003.1 1012.3 1026.6 1029.6 1033.8 1033.8 DAY 26 8 21 24 16 1 15 3 26 19 22 28 MIN. QFF PRESSURE IN HPA 1014.9 1007.9 1005.2 997.8 992.7 991.2 989.3 995.1 998.0 1007.0 1010.0 1010.4 989.3 DAY 24 15 14 15 12 27 4 10 2 2 1 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.6 7.0 12.7 21.6 26.2 32.1 34.0 31.5 26.9 19.9 13.2 7.8 19.9 MINIMUN AIR TEMPERATURE (C) 0.3 1.0 7.3 12.6 16.4 21.1 23.2 19.9 15.9 9.3 3.8 2.2 11.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 17 27 12 0 0 0 0 57 DAYS WITH MINIMUM TEMP. <=-4 3 4 0 0 0 0 0 0 0 0 0 0 7 DAYS WITH FREEZING MIN.<= 0 17 12 2 0 0 0 0 0 0 0 6 12 49 TEMPERATURE RECORDS LOWEST(C) -4.6 -6.8 -0.6 5.6 9.4 15.0 19.0 13.2 7.0 3.0 -2.8 -3.6 -6.8 DAY 13 15 13 15 8 26 2 26 29 15 25 21 MAXIMUM AIR TEMPERATURE (C) 10.3 12.2 17.5 27.3 31.9 37.9 40.1 38.5 34.3 26.6 20.1 12.6 25.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 11 21 30 31 31 25 1 0 0 150 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.6 20.2 24.0 34.8 40.6 42.2 45.8 43.6 41.4 30.0 28.0 19.6 45.8 DAY 25 20 30 25 30 12 8 7 9 26 2 2 DIF. BETWEEN (MAX.-MIN.) (C) 10.0 11.2 10.2 14.7 15.5 16.8 16.9 18.6 18.4 17.3 16.3 10.4 14.7 MEAN DAILY TEMP. (MDT) (C) 5.3 6.6 12.4 19.9 24.2 29.5 31.6 29.2 25.1 18.0 11.9 7.4 18.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 30.6 110.5 254.6 329.8 252.9 129.1 2.7 0.0 0.0 1110.2 HEATING DEG. DAYS(BASE 18 0C) 393.3 319.1 174.6 21.0 2.7 0.0 0.0 0.0 4.0 24.2 181.8 327.5 1448.2 DEWPOINT (MEAN C) 0.3 -1.0 5.4 5.3 6.1 6.4 7.3 4.7 4.4 2.7 -0.6 1.1 3.5 MIXING RATIO (G/KG) 4.41 4.08 6.41 6.38 6.73 6.85 7.21 6.32 5.95 5.25 4.09 4.72 5.70 VAPOUR PRESSURE (HPA) 6.45 5.97 9.31 9.27 9.72 9.88 10.37 9.11 8.64 7.67 6.00 6.90 8.27 SATURATION DEF. (HPA) 3.01 4.69 5.99 18.16 26.26 39.95 45.06 39.75 29.98 16.94 10.39 4.36 20.38 RELATIVE HUMIDITY (MEAN %) 71 61 64 39 32 22 21 21 26 34 42 66 42 RELATIVE HUMIDITY (MAX. %) 89 83 87 64 51 35 34 34 42 53 65 85 60 RELATIVE HUMIDITY (MIN. %) 53 42 47 24 21 15 14 14 17 24 27 50 29 RELATIVE HUMIDITY (MEAN% 03UTC) 89 82 87 64 51 34 34 34 42 53 65 84 60 RELATIVE HUMIDITY (MEAN% 09UTC) 64 52 57 29 25 17 17 17 20 26 32 57 34 RELATIVE HUMIDITY (MEAN% 15UTC) 70 58 58 31 25 18 16 17 22 32 39 65 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 20.8 36.0 78.7 2.7 15.2 0.0 0.0 0.0 0.0 0.2 2.2 35.1 190.9 DAYS WITH PRECIPITATION >=10 0 0 3 0 1 0 0 0 0 0 0 2 6 DAYS WITH PRECIPITATION >= 5 3 4 5 0 1 0 0 0 0 0 0 2 15 DAYS WITH PRECIPITATION >= 1 4 6 8 1 2 0 0 0 0 0 1 6 28 DAYS WITH PRECIPITATION 9 8 12 5 5 0 0 0 0 2 2 10 53 GREATEST DAILY PRECIPITATION 5.7 9.0 26.0 1.0 12.0 0.0 0.0 0.0 0.0 0.1 2.0 15.0 26.0 DAY 3 23 1 7 5 ** ** ** ** 5 16 15 DAY WITH THUNDER STORM 0 1 0 0 2 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 2 2 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH DUST 0 1 0 0 4 2 2 0 1 0 0 0 10 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 6.2 7.1 6.7 7.0 9.2 7.2 6.9 6.6 6.3 5.2 5.0 5.9 6.9 PREVAILING WIND PERCENT 11.0 15.0 36.1 24.0 31.6 39.3 29.7 37.4 26.0 12.3 14.7 9.0 23.9 CALMS PERCENT OF WIND 87.7 73.6 56.8 66.0 49.0 45.3 47.7 49.0 64.7 81.9 80.7 85.2 65.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 314 291 308 310 310 322 328 324 322 321 312 317 316 VECTOR WIND MAGNITUDE(KNOTS) 0.7 1.3 2.8 1.9 3.5 3.5 2.8 2.9 1.9 0.8 0.9 0.6 1.9 WIND STEADINESES (MEAN %) 87.5 65.0 93.3 82.6 74.5 92.1 87.5 87.9 90.5 88.9 90.0 66.7 82.6 WIND SPEED (MEAN KNOTS) 0.8 2.0 3.0 2.3 4.7 3.8 3.2 3.3 2.1 0.9 1.0 0.9 2.3 FASTEST WIND DIRECTION 330 180 270 210 330 300 320 320 30 320 270 330 330 FASTEST WIND SPEED (KNOTS) 12 19 19 14 39 19 17 12 12 8 10 12 39 DAY 15 21 11 5 11 8 11 4 11 9 20 26 DAYS WITH SKY CLEAR (0-2)/8 14 10 2 11 15 27 31 31 30 25 25 11 232 DAYS WITH P.CLOUDY (3-6)/8 9 10 20 14 15 3 0 0 0 6 5 11 93 DAYS WITH CLOUDY (7-8)/8 8 8 9 5 1 0 0 0 0 0 0 9 40 DAYS WITH VISIBILITY =< 2 KM 0 2 0 0 2 0 0 0 0 0 0 3 7 DURATION OF SUNSHINE HOURS 155.8 156.2 200.8 263.9 303.3 358.1 362.3 338.4 293.8 261.4 227.5 118.1 3039.6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 918.2 917.8 914.2 913.3 909.2 907.7 905.6 907.4 913.1 917.8 919.5 917.0 913.4 MAX. QFE PRESSURE IN HPA 927.5 931.6 923.2 920.7 916.3 914.7 911.3 913.0 920.8 922.1 926.0 925.8 931.6 DAY-HOUR 12- 6 15- 6 12- 6 15- 6 9- 6 24- 3 1- 3 22- 6 27- 6 20- 6 24- 6 18- 6 MIN. QFE PRESSURE IN HPA 906.5 909.8 902.5 904.0 900.6 898.3 898.2 901.0 905.5 912.4 911.0 909.0 898.2 DAY-HOUR 25-12 4-12 7- 3 10-15 23- 3 12-15 14-12 12-15 3-12 4-12 6-12 1-12 MEAN QNH PRESSURE IN HPA 1020.4 1019.9 1016.1 1015.0 1010.6 1009.0 1006.7 1008.7 1014.9 1020.0 1021.8 1019.1 1015.2 MAX. QNH PRESSURE IN HPA 1030.6 1035.0 1025.9 1023.1 1018.4 1016.6 1012.9 1014.8 1023.3 1024.7 1028.9 1028.7 1035.0 DAY-HOUR 12- 6 15- 6 12- 6 15- 6 9- 6 24- 3 1- 3 22- 6 27- 6 20- 6 24- 6 18- 6 MIN. QNH PRESSURE IN HPA 1007.7 1011.3 1003.3 1005.0 1001.2 998.7 998.6 1001.7 1006.6 1014.1 1012.6 1010.4 998.6 DAY-HOUR 25-12 4-12 7- 3 10-15 23- 3 12-15 14-12 12-15 3-12 4-12 6-12 1-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 918.1 918.0 914.5 914.0 909.9 909.0 907.1 908.7 914.1 918.4 920.0 917.2 914.1 MAX. QFE PRESSURE IN HPA 925.8 929.8 921.5 919.6 915.8 914.7 911.3 912.6 919.8 920.9 924.3 924.8 929.8 DAY 13 15 12 16 9 24 1 23 27 13 24 18 MIN. QFE PRESSURE IN HPA 906.7 910.5 902.5 907.4 900.6 901.6 901.7 904.6 909.0 914.0 912.9 909.5 900.6 DAY 26 21 7 10 23 12 14 12 3 5 5 26 MEAN QNH PRESSURE IN HPA 1020.3 1020.2 1016.4 1015.9 1011.3 1010.4 1008.3 1010.1 1015.9 1020.6 1022.4 1019.3 1015.9 MAX. QNH PRESSURE IN HPA 1028.7 1033.1 1024.0 1021.9 1017.8 1016.6 1012.9 1014.3 1022.2 1023.4 1027.1 1027.6 1033.1 DAY 13 15 12 16 9 24 1 23 27 13 24 18 MIN. QNH PRESSURE IN HPA 1007.9 1012.0 1003.3 1008.7 1001.2 1002.3 1002.4 1005.6 1010.4 1015.8 1014.7 1010.9 1001.2 DAY 26 21 7 10 23 12 14 12 3 5 5 26 MEAN QFF PRESSURE IN HPA 1022.6 1021.9 1015.7 1012.4 1006.1 1003.2 1000.4 1003.3 1010.9 1018.3 1022.5 1020.7 1013.2 MAX. QFF PRESSURE IN HPA 1032.7 1038.2 1026.3 1020.3 1014.6 1010.4 1005.4 1008.7 1020.6 1022.2 1029.1 1030.9 1038.2 DAY 13 15 12 15 8 24 2 23 29 14 24 18 MIN. QFF PRESSURE IN HPA 1007.7 1010.4 1002.5 1004.8 994.2 994.4 994.5 998.7 1004.0 1011.1 1012.8 1012.2 994.2 DAY 26 21 7 10 23 13 8 13 8 5 6 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 919.6 919.3 915.6 914.9 910.4 909.3 907.3 909.2 915.0 919.5 921.2 918.5 915.0 MAX. QFE PRESSURE IN HPA 927.5 931.6 923.2 920.7 916.3 914.6 911.3 913.0 920.8 922.1 926.0 925.8 931.6 DAY 12 15 12 15 9 24 1 22 27 20 24 18 MIN. QFE PRESSURE IN HPA 908.2 911.4 904.3 907.7 902.0 901.9 901.6 905.1 909.3 915.0 914.2 912.2 901.6 DAY 26 21 7 10 23 12 14 12 3 5 6 26 MEAN QNH PRESSURE IN HPA 1021.9 1021.6 1017.6 1016.8 1011.9 1010.7 1008.6 1010.6 1016.9 1021.8 1023.7 1020.7 1016.9 MAX. QNH PRESSURE IN HPA 1030.6 1035.0 1025.9 1023.1 1018.4 1016.5 1012.9 1014.8 1023.3 1024.7 1028.9 1028.7 1035.0 DAY 12 15 12 15 9 24 1 22 27 20 24 18 MIN. QNH PRESSURE IN HPA 1009.5 1013.0 1005.3 1009.0 1002.8 1002.7 1002.3 1006.2 1010.7 1016.9 1016.1 1013.9 1002.3 DAY 26 21 7 10 23 12 14 12 3 5 6 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 918.3 918.0 914.6 913.6 909.6 908.0 906.0 907.8 913.4 917.9 919.4 916.9 913.6 MAX. QFE PRESSURE IN HPA 925.8 931.4 922.8 919.6 915.5 912.9 910.2 911.4 919.4 920.6 924.5 923.7 931.4 DAY 12 15 12 15 8 16 1 22 27 20 24 18 MIN. QFE PRESSURE IN HPA 908.5 910.8 903.8 905.8 903.2 900.5 900.2 903.6 907.4 914.0 912.2 911.4 900.2 DAY 25 1 7 10 22 12 14 12 3 4 6 1 MEAN QNH PRESSURE IN HPA 1020.5 1020.2 1016.5 1015.4 1011.0 1009.4 1007.1 1009.1 1015.2 1020.1 1021.8 1019.0 1015.4 MAX. QNH PRESSURE IN HPA 1028.7 1034.8 1025.4 1021.9 1017.5 1014.7 1011.7 1013.0 1021.7 1023.0 1027.3 1026.4 1034.8 DAY 12 15 12 15 8 16 1 22 27 20 24 18 MIN. QNH PRESSURE IN HPA 1009.9 1012.4 1004.7 1006.9 1004.1 1001.1 1000.8 1004.5 1008.7 1015.8 1013.9 1013.0 1000.8 DAY 25 1 7 10 22 12 14 12 3 4 6 1 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 917.2 916.6 913.0 911.9 908.1 906.4 904.1 905.8 911.5 916.5 918.1 915.9 912.1 MAX. QFE PRESSURE IN HPA 925.0 929.8 921.8 918.0 914.5 911.4 908.4 909.4 917.9 919.6 923.0 922.9 929.8 DAY 12 15 12 15 8 24 1 31 28 20 24 17 MIN. QFE PRESSURE IN HPA 906.5 909.8 904.9 904.2 902.3 898.9 898.2 901.3 905.5 912.4 911.0 909.0 898.2 DAY 25 4 7 10 22 12 14 12 3 4 6 1 MEAN QNH PRESSURE IN HPA 1019.3 1018.7 1014.7 1013.6 1009.4 1007.6 1005.0 1007.0 1013.2 1018.6 1020.3 1017.9 1013.8 MAX. QNH PRESSURE IN HPA 1027.8 1033.1 1024.3 1020.2 1016.4 1013.0 1009.7 1010.8 1020.1 1021.9 1025.7 1025.5 1033.1 DAY 12 15 12 15 8 24 1 31 28 20 24 17 MIN. QNH PRESSURE IN HPA 1007.7 1011.3 1005.9 1005.2 1003.1 999.4 998.6 1002.0 1006.6 1014.1 1012.6 1010.4 998.6 DAY 25 4 7 10 22 12 14 12 3 4 6 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 917.9 917.0 913.4 912.0 907.9 906.1 903.6 905.5 911.5 916.9 918.7 916.7 912.3 MAX. QFE PRESSURE IN HPA 925.8 929.3 922.1 918.0 914.3 911.2 908.4 909.9 918.4 920.3 923.3 924.3 929.3 DAY 12 15 12 14 8 24 1 31 28 20 13 17 MIN. QFE PRESSURE IN HPA 907.1 909.8 905.9 904.0 901.4 898.3 898.6 901.0 905.5 912.4 912.0 910.1 898.3 DAY 25 4 7 10 22 12 8 12 3 4 5 1 MEAN QNH PRESSURE IN HPA 1020.1 1019.2 1015.2 1013.6 1009.2 1007.2 1004.5 1006.6 1013.2 1019.0 1021.0 1018.8 1014.0 MAX. QNH PRESSURE IN HPA 1028.7 1032.5 1024.7 1020.2 1016.2 1012.8 1009.7 1011.4 1020.6 1022.7 1026.0 1027.1 1032.5 DAY 12 15 12 14 8 24 1 31 28 20 13 17 MIN. QNH PRESSURE IN HPA 1008.3 1011.3 1007.0 1005.0 1002.1 998.7 999.1 1001.7 1006.6 1014.1 1013.7 1011.6 998.7 DAY 25 4 7 10 22 12 8 12 3 4 5 1 MEAN QFF PRESSURE IN HPA 1022.3 1020.9 1014.4 1010.0 1003.9 999.9 996.6 999.7 1008.1 1016.6 1021.1 1020.2 1011.1 MAX. QFF PRESSURE IN HPA 1032.4 1037.1 1027.0 1019.2 1013.1 1007.0 1002.5 1005.7 1018.6 1020.3 1028.7 1029.4 1037.1 DAY 12 15 12 14 8 24 1 31 30 20 24 17 MIN. QFF PRESSURE IN HPA 1008.9 1011.2 1006.6 1000.8 996.2 990.6 990.1 994.0 1000.2 1009.7 1012.0 1011.9 990.1 DAY 25 28 7 10 22 12 8 12 8 4 6 1 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 BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.4 8.4 10.6 19.8 23.0 32.5 33.7 30.2 25.4 19.2 13.5 7.6 19.0 MINIMUN AIR TEMPERATURE (C) -0.7 0.5 2.8 11.8 14.6 22.4 22.6 19.9 13.6 7.9 4.1 2.5 10.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 24 26 14 0 0 0 0 65 DAYS WITH MINIMUM TEMP. <=-4 6 3 3 0 0 0 0 0 0 0 1 1 14 DAYS WITH FREEZING MIN.<= 0 17 16 9 0 0 0 0 0 0 1 5 7 55 TEMPERATURE RECORDS LOWEST(C) -8.0 -7.0 -5.0 4.2 8.0 17.4 17.4 14.2 8.6 -0.4 -4.6 -4.4 -8.0 DAY 30 17 13 9 3 11 19 19 11 19 29 29 MAXIMUM AIR TEMPERATURE (C) 9.1 14.7 16.2 25.5 28.6 38.2 39.7 36.2 32.7 26.9 20.7 12.1 25.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 6 16 30 31 30 28 7 0 0 148 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.4 24.0 25.6 31.6 36.6 42.4 43.6 40.0 38.2 31.8 26.0 16.6 43.6 DAY 3 25 30 14 31 18 6 2 25 11 14 1 DIF. BETWEEN (MAX.-MIN.) (C) 9.8 14.2 13.4 13.7 14.0 15.8 17.1 16.3 19.1 19.0 16.6 9.6 14.9 MEAN DAILY TEMP. (MDT) (C) 4.2 7.6 9.5 18.7 21.6 30.3 31.2 28.0 23.2 17.4 12.4 7.3 17.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 19.0 64.9 278.9 315.7 217.9 70.2 0.0 0.0 0.0 966.7 HEATING DEG. DAYS(BASE 18 0C) 428.6 303.5 264.0 40.0 16.0 0.0 0.0 0.0 0.0 38.0 168.7 332.5 1591.2 DEWPOINT (MEAN C) -2.1 -3.6 -2.8 4.2 5.6 6.9 6.5 7.6 4.3 -0.4 -1.8 1.2 2.1 MIXING RATIO (G/KG) 3.74 3.35 3.66 5.82 6.53 7.05 6.86 7.54 5.87 4.21 3.84 4.76 5.27 VAPOUR PRESSURE (HPA) 5.48 4.89 5.34 8.45 9.47 10.18 9.88 10.88 8.54 6.15 5.64 6.96 7.65 SATURATION DEF. (HPA) 3.32 7.00 8.31 16.13 20.54 40.71 44.86 34.18 25.90 17.81 11.05 3.83 19.47 RELATIVE HUMIDITY (MEAN %) 65 46 43 41 38 23 20 25 27 28 37 67 38 RELATIVE HUMIDITY (MAX. %) 84 67 68 68 61 38 33 34 38 37 55 84 56 RELATIVE HUMIDITY (MIN. %) 49 29 28 25 25 14 14 20 20 21 25 51 27 RELATIVE HUMIDITY (MEAN% 03UTC) 82 66 65 67 60 38 33 34 37 37 55 82 55 RELATIVE HUMIDITY (MEAN% 09UTC) 54 37 34 31 31 18 16 23 23 25 29 59 32 RELATIVE HUMIDITY (MEAN% 15UTC) 64 43 37 33 29 16 15 22 23 25 35 66 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.3 2.2 13.6 19.5 33.0 0.2 0.0 0.0 0.0 0.0 4.2 17.7 100.7 DAYS WITH PRECIPITATION >=10 0 0 0 0 1 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 0 0 0 2 3 0 0 0 0 0 0 1 6 DAYS WITH PRECIPITATION >= 1 4 1 5 4 7 0 0 0 0 0 1 5 27 DAYS WITH PRECIPITATION 10 7 6 9 7 2 0 0 0 0 2 9 52 GREATEST DAILY PRECIPITATION 3.0 1.0 4.0 6.0 10.0 0.1 0.0 0.0 0.0 0.0 4.0 8.0 10.0 DAY 25 3 24 1 2 1 ** ** ** ** 16 9 DAY WITH THUNDER STORM 1 0 0 1 1 2 0 0 0 0 0 0 5 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 2 6 2 3 2 3 1 4 1 1 1 0 26 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 6.4 7.6 7.6 7.0 7.9 7.3 5.7 8.8 6.1 7.7 6.6 6.5 7.3 PREVAILING WIND PERCENT 16.1 13.8 20.8 18.0 34.8 30.7 14.2 42.9 36.0 20.0 13.3 7.7 22.4 CALMS PERCENT OF WIND 72.9 73.8 63.0 59.3 45.8 48.7 56.1 40.3 56.7 74.8 82.7 89.7 63.6 NO. OF WIND OBSERVATION 155 145 154 150 155 150 155 154 150 155 150 155 1828 VECTOR WIND DIRECTION (MEAN) 290 269 302 291 307 324 356 315 321 315 309 314 313 VECTOR WIND MAGNITUDE(KNOTS) 1.0 0.8 1.9 1.5 3.1 3.0 1.6 4.7 2.5 1.7 1.0 0.7 1.9 WIND STEADINESES (MEAN %) 47.6 32.0 70.4 50.0 75.6 83.3 59.3 92.2 96.2 94.4 90.9 100.0 70.4 WIND SPEED (MEAN KNOTS) 2.1 2.5 2.7 3.0 4.1 3.6 2.7 5.1 2.6 1.8 1.1 0.7 2.7 FASTEST WIND DIRECTION 150 150 270 280 210 330 30 330 330 300 300 300 150 FASTEST WIND SPEED (KNOTS) 29 23 23 19 23 19 16 16 16 16 19 14 29 DAY 17 25 10 19 23 19 30 3 30 7 26 10 DAYS WITH SKY CLEAR (0-2)/8 9 19 10 10 14 22 31 29 30 31 20 9 234 DAYS WITH P.CLOUDY (3-6)/8 16 6 16 13 13 8 0 2 0 0 8 14 96 DAYS WITH CLOUDY (7-8)/8 6 4 5 7 4 0 0 0 0 0 2 8 36 DAYS WITH VISIBILITY =< 2 KM 1 1 0 0 0 2 0 1 0 0 1 2 8 DURATION OF SUNSHINE HOURS 140.8 184.8 216.9 210.8 280.0 317.4 370.1 329.8 286.7 273.3 190.6 139.7 2940.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 917.6 913.9 915.0 911.7 912.9 907.4 906.6 909.6 913.7 916.6 918.8 917.9 913.5 MAX. QFE PRESSURE IN HPA 930.7 923.2 927.4 918.2 920.0 914.7 912.0 917.3 919.7 922.7 927.7 925.3 930.7 DAY-HOUR 10- 6 16- 6 12- 6 12- 6 6- 6 11- 6 16- 6 31- 6 2- 6 30- 6 4- 6 29- 6 MIN. QFE PRESSURE IN HPA 906.0 903.2 903.1 900.4 906.4 897.0 901.1 901.6 907.9 911.1 907.1 911.1 897.0 DAY-HOUR 3- 3 25-12 31-12 18-15 4-15 27-15 23-15 1-15 18-12 6-15 26- 9 19-12 MEAN QNH PRESSURE IN HPA 1019.7 1015.8 1017.0 1013.4 1014.7 1008.6 1007.7 1011.0 1015.5 1018.7 1021.1 1020.1 1015.3 MAX. QNH PRESSURE IN HPA 1034.0 1025.9 1030.4 1020.4 1022.4 1016.6 1013.7 1019.4 1022.1 1025.3 1030.8 1028.2 1034.0 DAY-HOUR 10- 6 16- 6 12- 6 12- 6 6- 6 11- 6 16- 6 31- 6 2- 6 30- 6 4- 6 29- 6 MIN. QNH PRESSURE IN HPA 1007.1 1004.1 1004.0 1001.0 1007.6 997.3 1001.8 1002.3 1009.2 1012.7 1008.3 1012.7 997.3 DAY-HOUR 3- 3 25-12 31-12 18-15 4-15 27-15 23-15 1-15 18-12 6-15 26- 9 19-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 917.5 914.3 915.4 912.2 913.5 908.6 908.0 910.8 914.6 917.2 919.4 918.0 914.1 MAX. QFE PRESSURE IN HPA 928.9 921.0 925.5 916.8 919.3 914.2 911.9 916.6 919.3 921.8 926.1 924.2 928.9 DAY 10 17 13 12 6 11 16 31 2 30 4 29 MIN. QFE PRESSURE IN HPA 906.0 906.3 904.2 905.9 908.7 900.7 905.3 905.4 909.5 912.8 909.3 911.6 900.7 DAY 3 11 31 18 10 27 19 1 18 6 26 28 MEAN QNH PRESSURE IN HPA 1019.6 1016.1 1017.4 1013.9 1015.3 1010.0 1009.3 1012.3 1016.5 1019.4 1021.7 1020.2 1016.0 MAX. QNH PRESSURE IN HPA 1032.1 1023.5 1028.4 1018.9 1021.6 1016.1 1013.6 1018.7 1021.6 1024.3 1029.0 1027.0 1032.1 DAY 10 17 13 12 6 11 16 31 2 30 4 29 MIN. QNH PRESSURE IN HPA 1007.1 1007.5 1005.2 1007.0 1010.1 1001.4 1006.4 1006.5 1010.9 1014.5 1010.7 1013.2 1001.4 DAY 3 11 31 18 10 27 19 1 18 6 26 28 MEAN QFF PRESSURE IN HPA 1022.4 1017.6 1018.0 1010.9 1011.1 1002.6 1001.6 1005.8 1012.1 1017.5 1021.7 1021.7 1013.6 MAX. QFF PRESSURE IN HPA 1036.8 1027.8 1032.2 1017.4 1020.1 1010.4 1006.4 1013.5 1018.4 1022.6 1027.6 1030.8 1036.8 DAY 10 17 13 4 3 11 16 31 2 18 29 29 MIN. QFF PRESSURE IN HPA 1006.6 1004.8 1001.1 1003.0 1005.3 992.4 998.7 998.9 1006.0 1011.8 1010.7 1014.2 992.4 DAY 3 25 31 18 24 27 24 2 18 6 26 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 918.8 915.5 916.6 913.3 914.3 908.8 908.3 911.3 915.5 918.4 920.4 919.4 915.1 MAX. QFE PRESSURE IN HPA 930.7 923.2 927.4 918.2 920.0 914.7 912.0 917.3 919.7 922.7 927.7 925.3 930.7 DAY 10 16 12 12 6 11 16 31 2 30 4 29 MIN. QFE PRESSURE IN HPA 908.0 906.1 904.9 906.2 909.6 900.8 905.7 906.0 910.7 914.3 909.3 913.0 900.8 DAY 3 11 31 18 10 27 19 1 18 6 26 28 MEAN QNH PRESSURE IN HPA 1021.1 1017.5 1018.6 1015.1 1016.1 1010.2 1009.6 1012.9 1017.5 1020.7 1022.9 1021.7 1017.0 MAX. QNH PRESSURE IN HPA 1034.0 1025.9 1030.4 1020.4 1022.4 1016.6 1013.7 1019.4 1022.1 1025.3 1030.8 1028.2 1034.0 DAY 10 16 12 12 6 11 16 31 2 30 4 29 MIN. QNH PRESSURE IN HPA 1009.3 1007.2 1005.9 1007.3 1011.1 1001.5 1006.8 1007.1 1012.3 1016.2 1010.7 1014.8 1001.5 DAY 3 11 31 18 10 27 19 1 18 6 26 28 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 917.4 914.2 915.4 912.1 913.4 907.7 906.9 909.9 913.9 916.8 918.7 917.8 913.7 MAX. QFE PRESSURE IN HPA 928.8 922.9 926.6 916.3 919.1 913.9 910.3 916.0 918.2 920.8 925.9 923.9 928.8 DAY 10 16 12 12 6 11 15 31 2 30 4 29 MIN. QFE PRESSURE IN HPA 908.0 905.0 904.2 904.0 909.0 899.4 903.8 904.6 909.2 912.9 907.1 911.9 899.4 DAY 3 11 31 18 10 27 19 1 18 6 26 28 MEAN QNH PRESSURE IN HPA 1019.6 1016.1 1017.4 1013.8 1015.2 1009.0 1008.2 1011.4 1015.7 1018.9 1021.0 1020.0 1015.5 MAX. QNH PRESSURE IN HPA 1032.0 1025.5 1029.6 1018.4 1021.4 1015.7 1011.8 1018.0 1020.4 1023.3 1028.8 1026.6 1032.0 DAY 10 16 12 12 6 11 15 31 2 30 4 29 MIN. QNH PRESSURE IN HPA 1009.3 1006.0 1005.2 1005.0 1010.4 999.9 1004.7 1005.6 1010.6 1014.7 1008.3 1013.6 999.9 DAY 3 11 31 18 10 27 19 1 18 6 26 28 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 916.6 912.5 913.9 910.4 911.8 906.0 905.1 908.1 912.1 915.2 917.4 916.7 912.1 MAX. QFE PRESSURE IN HPA 927.4 921.6 925.4 915.0 917.7 912.0 908.8 914.7 916.9 919.6 924.6 922.4 927.4 DAY 10 16 12 3 2 11 15 31 2 29 4 29 MIN. QFE PRESSURE IN HPA 909.0 903.2 903.1 901.0 907.6 897.7 902.2 902.3 907.9 911.3 907.6 911.1 897.7 DAY 3 25 31 18 4 27 23 1 18 6 26 19 MEAN QNH PRESSURE IN HPA 1018.7 1014.2 1015.7 1011.9 1013.5 1007.1 1006.1 1009.4 1013.7 1017.2 1019.5 1018.8 1013.8 MAX. QNH PRESSURE IN HPA 1030.4 1024.1 1028.3 1016.9 1019.9 1013.7 1010.2 1016.6 1019.0 1021.9 1027.4 1025.0 1030.4 DAY 10 16 12 3 2 11 15 31 2 29 4 29 MIN. QNH PRESSURE IN HPA 1010.4 1004.1 1004.0 1001.7 1008.9 998.1 1003.0 1003.1 1009.2 1012.9 1008.9 1012.7 998.1 DAY 3 25 31 18 4 27 23 1 18 6 26 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 917.5 913.1 914.1 910.7 911.6 905.7 904.5 907.8 912.3 915.6 918.3 917.6 912.4 MAX. QFE PRESSURE IN HPA 927.9 922.0 925.6 915.6 917.7 913.6 908.3 914.4 916.7 920.3 925.0 922.4 927.9 DAY 10 16 12 3 2 10 15 31 2 29 4 29 MIN. QFE PRESSURE IN HPA 911.4 905.5 903.6 900.4 906.4 897.0 901.1 901.6 908.1 911.1 912.0 912.5 897.0 DAY 2 25 31 18 4 27 23 1 17 6 25 19 MEAN QNH PRESSURE IN HPA 1019.7 1014.9 1015.9 1012.2 1013.3 1006.9 1005.5 1009.0 1014.0 1017.6 1020.5 1019.8 1014.1 MAX. QNH PRESSURE IN HPA 1031.0 1024.6 1028.5 1017.6 1019.9 1015.4 1009.6 1016.3 1018.8 1022.7 1027.8 1025.0 1031.0 DAY 10 16 12 3 2 10 15 31 2 29 4 29 MIN. QNH PRESSURE IN HPA 1013.0 1006.6 1004.5 1001.0 1007.6 997.3 1001.8 1002.3 1009.4 1012.7 1013.7 1014.2 997.3 DAY 2 25 31 18 4 27 23 1 17 6 25 19 MEAN QFF PRESSURE IN HPA 1022.4 1016.3 1016.5 1009.2 1009.1 999.5 997.7 1002.4 1009.4 1015.7 1020.5 1021.2 1011.7 MAX. QFF PRESSURE IN HPA 1035.7 1027.1 1032.1 1016.1 1019.1 1009.9 1002.6 1011.4 1014.9 1020.9 1027.2 1029.2 1035.7 DAY 10 16 12 3 2 10 15 31 2 29 29 29 MIN. QFF PRESSURE IN HPA 1013.1 1003.2 1001.3 996.9 1002.4 988.3 994.2 994.7 1004.5 1009.8 1013.5 1014.9 988.3 DAY 3 25 31 18 31 27 23 1 17 6 25 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION BOSHROOYEH (99407) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 54 N LONGITUDE 57 27 E DATA PROCESSING CENTER ELEVATION 885.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.7 9.1 12.4 21.5 26.8 32.5 33.4 30.9 27.9 18.0 12.4 7.3 19.7 MINIMUN AIR TEMPERATURE (C) -2.0 3.3 5.3 12.5 17.5 21.5 23.3 20.0 15.8 7.1 4.3 -0.7 10.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 5 17 29 12 2 0 0 0 65 DAYS WITH MINIMUM TEMP. <=-4 12 1 0 0 0 0 0 0 0 0 0 2 15 DAYS WITH FREEZING MIN.<= 0 25 5 2 0 0 0 0 0 0 0 7 22 61 TEMPERATURE RECORDS LOWEST(C) -6.0 -4.4 -2.4 6.6 11.0 16.0 19.0 12.5 11.0 0.6 -2.2 -5.2 -6.0 DAY 16 18 24 2 2 7 12 16 18 10 16 1 MAXIMUM AIR TEMPERATURE (C) 8.5 14.0 17.6 27.5 32.4 38.5 38.7 37.5 35.7 25.2 18.6 14.0 25.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 22 30 31 31 30 3 1 0 155 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.6 21.4 26.0 35.8 39.0 43.6 41.8 40.5 40.0 38.0 30.5 18.8 43.6 DAY 29 12 8 20 20 20 4 13 14 1 1 26 DIF. BETWEEN (MAX.-MIN.) (C) 10.5 10.7 12.3 15.0 14.9 17.0 15.4 17.5 19.9 18.1 14.3 14.7 15.0 MEAN DAILY TEMP. (MDT) (C) 3.2 8.7 11.4 20.0 24.9 30.0 31.0 28.7 25.8 16.1 11.5 6.7 18.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 19.5 131.0 270.3 311.0 239.7 142.9 13.1 0.0 0.0 1127.6 HEATING DEG. DAYS(BASE 18 0C) 457.2 261.1 203.6 10.7 0.5 0.0 0.0 0.0 0.0 86.0 204.4 351.7 1575.3 DEWPOINT (MEAN C) -2.2 2.4 0.1 4.5 7.7 6.2 8.7 3.6 1.7 -2.9 -1.0 -2.3 2.2 MIXING RATIO (G/KG) 3.62 5.15 4.49 6.06 7.45 6.78 7.95 5.57 4.88 3.57 4.16 3.59 5.27 VAPOUR PRESSURE (HPA) 5.31 7.52 6.55 8.79 10.78 9.78 11.44 8.07 7.09 5.25 6.09 5.28 7.66 SATURATION DEF. (HPA) 3.14 4.53 8.65 18.34 26.44 41.57 41.85 38.95 34.00 17.14 9.63 5.59 20.82 RELATIVE HUMIDITY (MEAN %) 69 66 48 38 33 22 23 19 20 27 43 53 38 RELATIVE HUMIDITY (MAX. %) 85 89 72 60 55 36 36 33 36 42 63 71 57 RELATIVE HUMIDITY (MIN. %) 53 47 31 24 21 14 17 12 13 17 28 36 26 RELATIVE HUMIDITY (MEAN% 03UTC) 84 89 71 60 55 36 36 33 36 41 63 71 56 RELATIVE HUMIDITY (MEAN% 09UTC) 60 56 39 29 26 18 19 15 15 20 33 42 31 RELATIVE HUMIDITY (MEAN% 15UTC) 67 61 40 32 27 15 19 15 16 24 40 51 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 16.6 33.1 22.1 14.2 9.8 0.2 0.0 0.0 0.0 0.0 6.0 4.0 106.0 DAYS WITH PRECIPITATION >=10 1 1 1 0 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 1 2 2 1 1 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION >= 1 5 7 3 5 2 0 0 0 0 0 2 1 25 DAYS WITH PRECIPITATION 6 13 6 6 3 1 0 0 0 0 6 1 42 GREATEST DAILY PRECIPITATION 10.0 14.0 10.6 6.0 7.0 0.2 0.0 0.0 0.0 0.0 3.0 4.0 14.0 DAY 14 5 2 28 8