STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 M MEANS AND EXTREMES FOR THE YEAR 1951 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.9 -2.3 7.8 12.9 17.2 21.8 25.8 25.1 21.1 12.0 7.0 -1.0 12.1 MINIMUN AIR TEMPERATURE (C) -4.6 -5.6 3.2 7.5 11.9 15.2 18.1 18.1 14.9 8.3 3.3 -3.5 7.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 0 1 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 21 16 0 0 0 0 0 0 0 0 0 15 52 DAYS WITH FREEZING MIN.<= 0 28 26 7 0 0 0 0 0 0 0 0 23 84 TEMPERATURE RECORDS LOWEST(C) -12.0 -16.0 -3.0 3.0 8.0 12.0 15.0 16.0 11.0 3.0 1.0 -13.0 -16.0 DAY 13 9 1 2 3 2 1 27 28 31 10 29 MAXIMUM AIR TEMPERATURE (C) 2.1 2.8 13.7 18.9 23.1 28.4 32.8 32.5 28.3 17.4 13.1 3.1 18.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 11 28 29 11 0 0 0 80 DAYS WITH MAXIMUM TEMP. <= 0 9 7 0 0 0 0 0 0 0 0 0 11 27 TEMPERATURE RECORDS HIGHEST(C) 10.0 8.0 20.0 24.0 30.0 32.0 37.0 36.0 34.0 29.0 18.0 12.0 37.0 DAY 1 24 24 16 31 24 27 22 3 1 14 1 DIF. BETWEEN (MAX.-MIN.) (C) 6.7 8.4 10.5 11.4 11.2 13.2 14.7 14.4 13.4 9.1 9.8 6.6 10.8 MEAN DAILY TEMP. (MDT) (C) -1.3 -1.4 8.4 13.2 17.5 21.8 25.5 25.3 21.6 12.8 8.2 -0.2 12.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.5 36.5 138.5 133.0 38.5 0.0 0.0 0.0 349.0 HEATING DEG. DAYS(BASE 18 0C) 597.5 543.0 296.5 143.0 50.0 0.0 0.0 0.0 2.5 167.5 294.0 563.5 2657.5 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. 37.3 54.3 47.3 51.3 18.1 17.7 0.0 3.7 1.7 45.2 31.0 66.4 374.0 DAYS WITH PRECIPITATION >=10 1 4 3 1 0 0 0 0 0 2 1 3 15 DAYS WITH PRECIPITATION >= 5 4 4 3 3 1 1 0 0 0 4 3 5 28 DAYS WITH PRECIPITATION >= 1 6 6 5 8 7 5 0 1 1 9 4 8 60 DAYS WITH PRECIPITATION 14 7 10 12 12 7 1 6 8 13 6 16 112 GREATEST DAILY PRECIPITATION 16.0 18.0 24.6 25.0 5.0 7.0 0.0 3.0 1.0 10.0 14.0 16.0 25.0 DAY 7 5 12 19 6 28 ** 14 25 10 27 19 DAY WITH THUNDER STORM 0 0 0 4 3 5 0 6 10 1 0 0 29 DAYS WITH SNOW OR SLEET 13 7 0 0 0 0 0 0 0 0 0 10 30 DAYS WITH DUST 0 0 0 1 2 0 0 0 1 0 0 1 5 WIND DIRECTION (PREVAILING) 225 315 225 225 225 225 90 90 225 225 90 225 225 PREVAILING WIND SPEED(KNOTS) 19.9 2.9 12.3 8.4 9.3 5.8 3.1 2.6 8.5 11.0 2.0 10.9 9.7 PREVAILING WIND PERCENT 7.3 6.7 6.5 13.8 17.3 10.4 10.5 8.1 8.3 11.3 3.8 6.5 7.9 CALMS PERCENT OF WIND 81.5 87.5 78.2 66.3 57.3 66.7 64.5 66.1 72.9 82.7 92.5 86.7 75.1 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 222 299 219 221 220 195 173 74 203 227 113 213 217 VECTOR WIND MAGNITUDE(KNOTS) 1.6 0.2 0.7 1.0 1.7 0.4 0.2 0.2 0.5 1.1 0.2 0.8 0.7 WIND STEADINESES (MEAN %) 80.0 66.7 43.8 52.6 58.6 28.6 14.3 16.7 35.7 73.3 100.0 72.7 50.0 WIND SPEED (MEAN KNOTS) 2.0 0.3 1.6 1.9 2.9 1.4 1.4 1.2 1.4 1.5 0.2 1.1 1.4 FASTEST WIND DIRECTION 230 310 230 230 230 230 230 230 230 230 130 180 230 FASTEST WIND SPEED (KNOTS) 60 9 37 24 30 13 13 9 30 30 9 30 60 DAY 22 27 11 8 23 5 5 6 30 4 30 16 DAYS WITH SKY CLEAR (0-2)/8 6 6 9 10 11 23 30 23 19 5 8 7 157 DAYS WITH P.CLOUDY (3-6)/8 10 15 16 14 16 6 1 8 10 15 14 12 137 DAYS WITH CLOUDY (7-8)/8 15 7 6 6 4 1 0 0 1 11 8 12 71 DAYS WITH VISIBILITY =< 2 KM 5 6 0 0 1 1 0 0 1 0 0 5 19 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 M MEANS AND EXTREMES FOR THE YEAR 1952 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.8 3.0 5.7 11.7 16.2 20.2 25.0 24.9 20.9 16.3 5.7 3.1 12.3 MINIMUN AIR TEMPERATURE (C) -7.6 -0.2 1.4 7.2 10.3 13.8 18.1 17.7 14.6 10.3 2.2 0.1 7.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 1 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 30 4 3 0 0 0 0 0 0 0 2 2 41 DAYS WITH FREEZING MIN.<= 0 31 15 9 0 0 0 0 0 0 0 12 15 82 TEMPERATURE RECORDS LOWEST(C) -14.0 -4.0 -7.0 1.0 3.0 12.0 13.0 16.0 12.0 6.0 -6.0 -5.0 -14.0 DAY 13 1 5 14 12 1 15 6 19 28 20 31 MAXIMUM AIR TEMPERATURE (C) -0.5 7.6 10.6 16.6 22.3 26.8 32.0 32.2 28.9 24.5 11.5 7.8 18.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 25 28 10 1 0 0 67 DAYS WITH MAXIMUM TEMP. <= 0 17 2 1 0 0 0 0 0 0 0 1 0 21 TEMPERATURE RECORDS HIGHEST(C) 5.0 12.0 24.0 27.0 29.0 33.0 36.0 35.0 32.0 30.0 21.0 17.0 36.0 DAY 17 8 31 4 22 30 27 11 5 2 4 9 DIF. BETWEEN (MAX.-MIN.) (C) 7.1 7.8 9.2 9.4 12.0 13.0 13.9 14.5 14.3 14.2 9.3 7.7 11.0 MEAN DAILY TEMP. (MDT) (C) -4.1 3.7 6.0 11.9 16.3 20.3 25.1 25.0 21.7 17.4 6.9 4.0 12.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 14.0 122.5 122.5 29.0 0.5 0.0 0.0 288.5 HEATING DEG. DAYS(BASE 18 0C) 684.0 414.5 372.0 190.0 75.5 1.0 0.0 0.0 0.0 39.0 334.0 435.5 2545.5 DEWPOINT (MEAN C) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** *** *** *** *** *** *** 92 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** *** *** *** *** *** *** 72 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** *** *** *** *** *** *** 84 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 14.7 55.5 58.8 129.6 32.6 23.0 0.3 0.1 4.0 1.0 22.5 46.4 388.5 DAYS WITH PRECIPITATION >=10 1 3 2 5 1 1 0 0 0 0 0 2 15 DAYS WITH PRECIPITATION >= 5 1 4 3 8 1 2 0 0 0 0 2 3 24 DAYS WITH PRECIPITATION >= 1 2 8 4 13 8 3 0 0 1 1 6 5 51 DAYS WITH PRECIPITATION 5 11 11 18 12 11 4 2 2 3 9 8 96 GREATEST DAILY PRECIPITATION 13.0 18.0 26.0 24.0 15.0 11.0 0.2 0.1 4.0 1.0 7.0 23.0 26.0 DAY 10 29 1 24 24 24 18 15 14 8 17 26 DAY WITH THUNDER STORM 0 0 0 2 4 7 0 1 1 0 0 0 15 DAYS WITH SNOW OR SLEET 6 5 6 2 0 0 0 0 0 0 3 3 25 DAYS WITH DUST 0 0 0 2 1 0 0 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 45 225 225 225 225 45 45 45 45 90 270 225 225 PREVAILING WIND SPEED(KNOTS) 3.5 7.0 11.8 14.4 7.0 2.8 2.3 2.3 2.5 3.1 2.5 11.3 8.8 PREVAILING WIND PERCENT 0.8 11.6 18.1 11.7 9.7 9.6 9.7 4.0 4.6 3.6 4.6 6.9 6.9 CALMS PERCENT OF WIND 96.0 76.7 66.1 72.1 70.6 70.0 69.0 87.5 80.8 83.5 77.9 85.9 78.0 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 135 201 223 226 202 270 37 309 218 113 228 229 220 VECTOR WIND MAGNITUDE(KNOTS) R< 0.1 0.9 2.1 1.9 0.9 0.3 0.2 0.1 0.2 0.2 0.1 0.7 0.6 WIND STEADINESES (MEAN %) 36.6 64.3 75.0 79.2 56.3 27.3 25.0 20.0 25.0 40.0 16.7 77.8 54.5 WIND SPEED (MEAN KNOTS) 0.1 1.4 2.8 2.4 1.6 1.1 0.8 0.5 0.8 0.5 0.6 0.9 1.1 FASTEST WIND DIRECTION 50 230 230 230 250 230 290 310 230 230 230 230 230 FASTEST WIND SPEED (KNOTS) 5 13 37 50 24 9 9 13 18 9 9 24 50 DAY 23 4 9 9 27 5 17 13 15 28 12 10 DAYS WITH SKY CLEAR (0-2)/8 4 12 8 8 17 24 20 27 28 25 9 8 190 DAYS WITH P.CLOUDY (3-6)/8 11 9 15 9 9 6 10 4 2 5 14 14 108 DAYS WITH CLOUDY (7-8)/8 16 8 8 13 5 0 1 0 0 1 7 9 68 DAYS WITH VISIBILITY =< 2 KM 4 1 3 0 0 0 0 1 0 0 2 5 16 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 863.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 866.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 30 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 856.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 22 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1010.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.1 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 30 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1003.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 863.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 867.2 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 30 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 856.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 22 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 30 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1003.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 22 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 863.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 867.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 30 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 858.1 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 22 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.2 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 30 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1005.3 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 22 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 863.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 867.5 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 29 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 858.1 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 22 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.0 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 29 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1005.3 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 M MEANS AND EXTREMES FOR THE YEAR 1953 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.3 3.0 2.7 11.1 17.1 21.2 23.9 24.2 20.4 14.1 4.5 -4.4 11.5 MINIMUN AIR TEMPERATURE (C) -3.4 -0.7 -0.9 6.6 11.5 14.6 18.0 17.3 14.3 9.2 2.0 -6.8 6.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 7 1 0 0 0 0 8 DAYS WITH MINIMUM TEMP. <=-4 16 3 3 0 0 0 0 0 0 0 4 28 54 DAYS WITH FREEZING MIN.<= 0 26 18 22 0 0 0 0 0 0 0 9 31 106 TEMPERATURE RECORDS LOWEST(C) -9.0 -6.0 -6.0 1.0 7.0 11.0 12.0 15.0 11.0 2.0 -12.0 -13.0 -13.0 DAY 15 13 16 1 5 11 1 24 21 25 30 1 MAXIMUM AIR TEMPERATURE (C) 4.6 8.6 7.1 16.1 23.7 28.1 30.6 31.6 28.0 21.5 9.1 -0.2 17.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 13 18 27 11 1 0 0 71 DAYS WITH MAXIMUM TEMP. <= 0 4 0 1 0 0 0 0 0 0 0 4 22 31 TEMPERATURE RECORDS HIGHEST(C) 10.0 12.0 16.0 22.0 30.0 32.0 37.0 34.0 34.0 30.0 17.0 6.0 37.0 DAY 6 18 29 13 18 28 15 10 2 3 3 26 DIF. BETWEEN (MAX.-MIN.) (C) 8.0 9.3 8.0 9.5 12.2 13.5 12.6 14.3 13.7 12.3 7.1 6.6 10.6 MEAN DAILY TEMP. (MDT) (C) 0.6 3.9 3.1 11.4 17.6 21.3 24.3 24.4 21.1 15.3 5.5 -3.5 12.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 5.5 36.0 107.5 106.5 33.0 0.0 0.0 0.0 288.5 HEATING DEG. DAYS(BASE 18 0C) 538.5 393.5 462.0 199.0 40.5 3.0 0.5 0.0 1.0 104.5 374.0 667.0 2783.5 DEWPOINT (MEAN C) -3.5 -2.7 -3.1 4.1 6.2 9.5 13.6 11.9 8.1 5.7 -0.5 -7.3 3.5 MIXING RATIO (G/KG) 3.53 3.72 3.62 6.13 7.11 8.88 11.69 10.51 8.17 6.83 4.49 2.65 6.44 VAPOUR PRESSURE (HPA) 4.85 5.09 4.95 8.37 9.69 12.05 15.78 14.22 11.14 9.37 6.17 3.66 8.78 SATURATION DEF. (HPA) 1.32 2.74 2.72 5.30 10.65 14.41 15.12 17.23 14.00 7.96 2.73 0.87 7.92 RELATIVE HUMIDITY (MEAN %) 80 68 69 65 52 50 55 48 48 60 72 81 62 RELATIVE HUMIDITY (MAX. %) 90 86 84 84 70 69 72 63 63 74 85 86 77 RELATIVE HUMIDITY (MIN. %) 65 47 51 47 34 32 38 32 31 38 56 71 45 RELATIVE HUMIDITY (MEAN% 03UTC) 84 80 80 79 66 65 68 59 60 70 80 80 73 RELATIVE HUMIDITY (MEAN% 09UTC) 73 54 57 56 40 42 44 38 36 45 62 79 52 RELATIVE HUMIDITY (MEAN% 15UTC) 81 64 63 54 44 37 46 39 42 60 71 82 57 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 64.6 27.5 92.3 109.2 27.7 18.6 42.5 0.0 0.2 8.6 47.7 18.1 457.0 DAYS WITH PRECIPITATION >=10 2 0 2 5 1 0 2 0 0 0 3 0 15 DAYS WITH PRECIPITATION >= 5 4 3 6 7 1 2 3 0 0 0 3 1 30 DAYS WITH PRECIPITATION >= 1 6 5 10 10 7 4 7 0 0 5 6 5 65 DAYS WITH PRECIPITATION 11 9 19 17 12 7 8 0 1 9 14 13 120 GREATEST DAILY PRECIPITATION 27.0 9.0 29.0 21.0 13.0 8.0 14.0 0.0 0.2 2.2 15.0 5.0 29.0 DAY 8 10 1 2 27 8 1 ** 24 26 19 8 DAY WITH THUNDER STORM 0 1 0 7 5 3 4 0 0 0 0 1 21 DAYS WITH SNOW OR SLEET 8 5 11 0 0 0 0 0 0 0 5 10 39 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 225 225 225 225 135 225 315 360 225 225 225 90 225 PREVAILING WIND SPEED(KNOTS) 8.4 6.6 8.4 7.4 3.3 4.9 2.0 2.5 8.8 6.1 5.8 2.0 7.0 PREVAILING WIND PERCENT 10.1 18.3 11.7 10.4 7.7 5.8 2.8 4.8 5.0 6.0 10.8 0.4 7.1 CALMS PERCENT OF WIND 73.4 62.1 76.6 77.9 73.8 80.0 89.9 88.3 88.8 88.7 83.8 99.2 82.0 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 232 223 225 214 193 189 314 22 217 223 230 45 222 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.3 1.2 0.8 0.4 0.2 0.1 0.1 0.5 0.3 0.6 R< 0.1 0.5 WIND STEADINESES (MEAN %) 69.2 72.2 85.7 72.7 40.0 33.3 33.3 33.3 83.3 60.0 75.0 ***** 62.5 WIND SPEED (MEAN KNOTS) 1.3 1.8 1.4 1.1 1.0 0.6 0.3 0.3 0.6 0.5 0.8 0.0 0.8 FASTEST WIND DIRECTION 230 230 230 230 230 230 230 360 230 230 230 360 230 FASTEST WIND SPEED (KNOTS) 37 13 40 24 24 9 9 5 24 13 9 2 40 DAY 31 5 7 20 7 7 24 4 9 7 4 8 DAYS WITH SKY CLEAR (0-2)/8 16 12 9 9 16 23 23 31 24 14 8 11 196 DAYS WITH P.CLOUDY (3-6)/8 5 12 12 12 12 7 8 0 6 13 11 4 102 DAYS WITH CLOUDY (7-8)/8 10 4 10 9 3 0 0 0 0 4 11 16 67 DAYS WITH VISIBILITY =< 2 KM 4 2 6 0 0 0 0 0 0 0 2 5 19 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 860.3 857.1 857.2 858.9 858.1 856.5 855.7 856.8 859.7 862.9 861.4 863.9 859.0 MAX. QFE PRESSURE IN HPA 871.8 869.2 867.9 865.1 862.9 864.1 865.1 864.7 866.3 872.9 869.7 871.7 872.9 DAY-HOUR 2- 6 15- 9 27-18 16- 9 18- 0 5- 6 20- 6 31- 6 21- 6 26- 6 30-18 5- 6 MIN. QFE PRESSURE IN HPA 848.4 844.5 842.9 848.4 848.1 848.7 850.1 851.6 849.3 855.5 846.3 855.8 842.9 DAY-HOUR 11-12 19- 9 13- 0 20-12 7-12 29-15 6-15 23-15 9-12 22-12 4-21 20-12 MEAN QNH PRESSURE IN HPA 1007.8 1004.2 1004.2 1006.2 1005.3 1003.4 1002.6 1003.8 1007.1 1010.7 1009.0 1011.9 1006.4 MAX. QNH PRESSURE IN HPA 1020.9 1017.9 1016.5 1013.3 1010.8 1012.1 1013.3 1012.8 1014.6 1022.1 1018.5 1020.8 1022.1 DAY-HOUR 2- 6 15- 9 27-18 16- 9 18- 0 5- 6 20- 6 31- 6 21- 6 26- 6 30-18 5- 6 MIN. QNH PRESSURE IN HPA 994.3 989.8 988.0 994.3 993.9 994.6 996.2 997.9 995.3 1002.4 991.9 1002.7 988.0 DAY-HOUR 11-12 19- 9 13- 0 20-12 7-12 29-15 6-15 23-15 9-12 22-12 4-21 20-12 MEAN QFF PRESSURE IN HPA 1011.4 1005.7 1005.9 1003.0 998.9 994.7 992.3 993.5 998.9 1006.0 1009.7 1018.2 1003.2 MAX. QFF PRESSURE IN HPA 1027.4 1021.4 1017.9 1012.3 1004.0 1003.5 1003.1 1002.9 1009.3 1022.1 1029.0 1029.3 1029.3 DAY-HOUR 2- 6 15- 6 9- 6 1- 6 1-15 5- 3 20- 6 30- 6 21- 6 26- 6 30-18 2- 3 MIN. QFF PRESSURE IN HPA 996.3 989.4 988.2 989.2 988.7 984.5 984.5 988.0 985.3 994.6 988.9 1007.2 984.5 DAY-HOUR 11-12 19- 9 13- 0 20-12 7-12 29-12 11-15 21-12 9-12 3-12 4-21 20-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 860.4 857.3 857.2 859.1 858.5 857.1 856.2 857.3 860.2 863.2 861.5 864.1 859.3 MAX. QFE PRESSURE IN HPA 871.2 868.6 867.9 864.1 862.9 863.0 863.5 864.1 865.1 870.9 868.4 871.2 871.2 DAY 3 16 28 16 18 5 20 31 5 26 10 5 MIN. QFE PRESSURE IN HPA 850.1 848.3 842.9 850.8 852.1 850.5 851.5 852.5 853.1 857.9 853.1 857.1 842.9 DAY 11 24 13 20 7 30 7 24 9 30 19 20 MEAN QNH PRESSURE IN HPA 1008.0 1004.4 1004.3 1006.5 1005.8 1004.1 1003.1 1004.4 1007.7 1011.2 1009.1 1012.1 1006.7 MAX. QNH PRESSURE IN HPA 1020.2 1017.2 1016.5 1012.1 1010.8 1010.9 1011.5 1012.1 1013.3 1019.9 1017.0 1020.2 1020.2 DAY 3 16 28 16 18 5 20 31 5 26 10 5 MIN. QNH PRESSURE IN HPA 996.2 994.2 988.0 997.0 998.5 996.7 997.8 998.9 999.6 1005.1 999.6 1004.2 988.0 DAY 11 24 13 20 7 30 7 24 9 30 19 20 MEAN QFF PRESSURE IN HPA 1011.0 1005.3 1005.7 1003.1 999.1 995.5 992.8 993.8 998.9 1005.7 1009.2 1018.0 1003.2 MAX. QFF PRESSURE IN HPA 1025.3 1018.2 1016.7 1010.3 1003.1 1002.3 999.8 1001.1 1006.8 1018.4 1022.1 1027.3 1027.3 DAY 3 16 28 1 1 5 20 31 21 26 30 2 MIN. QFF PRESSURE IN HPA 998.2 992.8 988.2 991.7 993.6 986.4 988.1 989.0 988.4 997.4 997.9 1009.1 986.4 DAY 31 19 13 20 8 29 11 24 9 7 19 20 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.5 857.2 857.1 859.0 858.3 857.1 856.4 857.5 860.4 863.3 861.5 864.1 859.4 MAX. QFE PRESSURE IN HPA 870.7 868.7 867.6 864.5 862.5 863.7 863.1 864.3 865.9 871.2 868.6 871.1 871.2 DAY 3 16 28 16 18 5 20 31 5 26 10 5 MIN. QFE PRESSURE IN HPA 848.9 847.5 843.1 850.3 850.8 850.3 851.9 852.9 852.9 857.7 851.9 856.9 843.1 DAY 11 19 13 20 7 29 7 24 9 30 19 20 MEAN QNH PRESSURE IN HPA 1008.0 1004.3 1004.2 1006.4 1005.5 1004.2 1003.4 1004.7 1007.9 1011.3 1009.2 1012.2 1006.8 MAX. QNH PRESSURE IN HPA 1019.6 1017.4 1016.1 1012.6 1010.3 1011.7 1011.0 1012.4 1014.2 1020.2 1017.2 1020.1 1020.2 DAY 3 16 28 16 18 5 20 31 5 26 10 5 MIN. QNH PRESSURE IN HPA 994.8 993.3 988.2 996.4 997.0 996.4 998.3 999.4 999.4 1004.9 998.3 1003.9 988.2 DAY 11 19 13 20 7 29 7 24 9 30 19 20 MEAN QFF PRESSURE IN HPA 1012.2 1006.4 1006.3 1003.7 999.7 995.9 993.4 994.8 1000.5 1007.2 1010.3 1019.0 1004.1 MAX. QFF PRESSURE IN HPA 1025.2 1020.4 1017.5 1012.2 1004.0 1003.5 1000.2 1002.5 1008.2 1019.6 1024.6 1029.3 1029.3 DAY 3 16 28 1 1 5 20 31 21 26 30 2 MIN. QFF PRESSURE IN HPA 997.6 992.2 989.2 992.1 993.0 986.2 988.2 990.4 989.2 998.0 997.4 1009.5 986.2 DAY 11 19 13 20 7 29 11 24 9 7 19 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 861.0 857.7 857.9 859.5 858.8 857.4 856.9 858.0 861.0 864.1 862.2 864.7 859.9 MAX. QFE PRESSURE IN HPA 871.8 869.1 867.5 864.9 862.5 864.1 865.1 864.7 866.3 872.9 869.3 871.7 872.9 DAY 2 16 28 16 18 5 20 31 21 26 9 5 MIN. QFE PRESSURE IN HPA 849.1 845.7 844.9 850.1 850.5 850.3 852.5 853.7 852.1 858.4 852.1 856.9 844.9 DAY 11 10 13 20 7 29 7 24 9 22 19 20 MEAN QNH PRESSURE IN HPA 1008.6 1004.8 1005.0 1006.9 1006.1 1004.5 1004.0 1005.2 1008.6 1012.1 1010.0 1012.8 1007.4 MAX. QNH PRESSURE IN HPA 1020.9 1017.8 1016.0 1013.0 1010.3 1012.1 1013.3 1012.8 1014.6 1022.1 1018.0 1020.8 1022.1 DAY 2 16 28 16 18 5 20 31 21 26 9 5 MIN. QNH PRESSURE IN HPA 995.1 991.2 990.3 996.2 996.7 996.4 998.9 1000.3 998.5 1005.7 998.5 1003.9 990.3 DAY 11 10 13 20 7 29 7 24 9 22 19 20 MEAN QFF PRESSURE IN HPA 1012.8 1006.9 1007.0 1004.0 999.8 995.7 993.8 995.2 1000.9 1007.9 1011.1 1019.6 1004.6 MAX. QFF PRESSURE IN HPA 1027.4 1021.4 1017.9 1012.3 1003.8 1003.2 1003.1 1002.9 1009.3 1022.1 1027.1 1028.7 1028.7 DAY 2 15 9 1 1 5 20 30 21 26 30 1 MIN. QFF PRESSURE IN HPA 998.1 991.2 991.1 991.1 992.1 985.6 988.1 990.8 988.3 998.2 997.8 1009.2 985.6 DAY 11 10 13 20 7 29 11 24 9 7 19 20 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 860.5 857.3 857.6 859.2 858.1 856.7 856.3 857.2 860.1 863.1 861.6 864.2 859.3 MAX. QFE PRESSURE IN HPA 871.5 869.2 867.0 865.1 861.9 863.7 864.1 863.9 865.1 871.9 869.3 870.6 871.9 DAY 2 15 27 16 17 5 20 31 21 26 30 5 MIN. QFE PRESSURE IN HPA 848.7 844.5 846.7 849.3 849.4 850.3 851.9 852.4 849.9 856.7 850.4 856.3 844.5 DAY 11 19 13 20 7 30 7 24 9 22 19 20 MEAN QNH PRESSURE IN HPA 1008.1 1004.4 1004.7 1006.5 1005.4 1003.7 1003.3 1004.3 1007.6 1011.0 1009.2 1012.2 1006.7 MAX. QNH PRESSURE IN HPA 1020.5 1017.9 1015.4 1013.3 1009.6 1011.7 1012.1 1011.9 1013.3 1021.0 1018.0 1019.5 1021.0 DAY 2 15 27 16 17 5 20 31 21 26 30 5 MIN. QNH PRESSURE IN HPA 994.6 989.8 992.3 995.3 995.4 996.4 998.3 998.8 996.0 1003.7 996.6 1003.3 989.8 DAY 11 19 13 20 7 30 7 24 9 22 19 20 MEAN QFF PRESSURE IN HPA 1011.2 1005.3 1006.0 1003.1 998.4 994.6 992.7 993.6 998.8 1005.5 1009.4 1017.8 1003.0 MAX. QFF PRESSURE IN HPA 1026.5 1019.8 1017.7 1011.5 1003.6 1002.9 1002.0 1000.9 1007.0 1020.8 1024.8 1025.9 1026.5 DAY 2 15 9 1 31 5 20 30 21 26 30 1 MIN. QFF PRESSURE IN HPA 997.2 989.4 991.4 989.8 990.3 985.4 987.5 989.0 985.8 996.4 995.0 1007.4 985.4 DAY 31 19 12 20 7 29 11 24 9 3 19 20 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 859.5 856.1 856.4 858.2 857.1 855.6 855.0 856.0 858.6 861.9 860.7 863.3 858.2 MAX. QFE PRESSURE IN HPA 870.7 867.7 866.7 863.8 861.5 862.1 861.9 862.7 863.9 871.1 869.1 869.5 871.1 DAY 2 15 27 16 1 5 20 30 20 26 30 5 MIN. QFE PRESSURE IN HPA 848.4 845.9 845.2 848.4 848.1 848.8 850.6 852.1 849.3 855.5 849.1 855.8 845.2 DAY 11 24 12 20 7 30 7 23 9 22 19 20 MEAN QNH PRESSURE IN HPA 1006.9 1003.1 1003.3 1005.4 1004.2 1002.4 1001.8 1002.9 1005.8 1009.6 1008.3 1011.2 1005.4 MAX. QNH PRESSURE IN HPA 1019.6 1016.2 1015.1 1011.8 1009.2 1009.9 1009.6 1010.5 1011.9 1020.1 1017.8 1018.3 1020.1 DAY 2 15 27 16 1 5 20 30 20 26 30 5 MIN. QNH PRESSURE IN HPA 994.3 991.4 990.6 994.3 993.9 994.7 996.8 998.5 995.3 1002.4 995.1 1002.7 990.6 DAY 11 24 12 20 7 30 7 23 9 22 19 20 MEAN QFF PRESSURE IN HPA 1009.7 1003.9 1004.7 1001.9 997.5 993.6 991.3 992.1 997.0 1004.2 1008.5 1016.9 1001.8 MAX. QFF PRESSURE IN HPA 1025.2 1017.1 1015.5 1010.7 1003.1 1001.6 998.9 999.6 1004.7 1019.7 1025.5 1025.7 1025.7 DAY 2 15 27 1 1 6 20 30 20 26 30 1 MIN. QFF PRESSURE IN HPA 996.3 991.5 988.9 989.2 988.7 984.5 986.0 988.0 985.3 994.6 992.8 1007.2 984.5 DAY 11 24 12 20 7 29 11 21 9 3 19 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 859.9 856.6 856.5 858.1 857.1 855.3 854.3 855.4 858.4 862.0 861.0 863.7 858.2 MAX. QFE PRESSURE IN HPA 871.3 868.4 867.5 863.3 861.8 860.9 860.7 862.7 864.2 870.7 869.3 870.0 871.3 DAY 2 15 27 16 1 5 20 30 20 26 30 9 MIN. QFE PRESSURE IN HPA 849.3 846.3 844.9 849.5 849.7 848.7 850.1 851.6 850.5 855.7 849.6 856.8 844.9 DAY 11 10 12 20 3 29 6 23 9 22 19 20 MEAN QNH PRESSURE IN HPA 1007.3 1003.6 1003.5 1005.3 1004.2 1002.1 1001.0 1002.3 1005.6 1009.8 1008.7 1011.7 1005.4 MAX. QNH PRESSURE IN HPA 1020.3 1017.0 1016.0 1011.2 1009.5 1008.5 1008.3 1010.5 1012.2 1019.6 1018.0 1018.8 1020.3 DAY 2 15 27 16 1 5 20 30 20 26 30 9 MIN. QNH PRESSURE IN HPA 995.3 991.9 990.3 995.5 995.8 994.6 996.2 997.9 996.7 1002.6 995.6 1003.8 990.3 DAY 11 10 12 20 3 29 6 23 9 22 19 20 MEAN QFF PRESSURE IN HPA 1011.4 1005.6 1005.6 1002.5 998.2 993.8 990.8 992.1 998.0 1005.7 1009.8 1018.4 1002.7 MAX. QFF PRESSURE IN HPA 1026.3 1019.8 1017.4 1011.4 1004.0 1000.3 997.5 1000.4 1006.2 1019.5 1026.5 1028.4 1028.4 DAY 2 15 27 1 1 5 20 30 20 26 30 1 MIN. QFF PRESSURE IN HPA 997.8 993.4 989.7 991.3 990.4 984.7 984.5 988.3 987.9 996.8 995.3 1009.4 984.5 DAY 23 10 12 20 3 29 11 23 9 3 19 26 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 860.5 857.4 857.3 858.9 858.4 856.2 855.1 856.2 859.1 862.6 861.5 863.8 858.9 MAX. QFE PRESSURE IN HPA 871.3 868.5 867.9 864.0 862.2 862.3 860.9 862.9 864.4 870.3 869.7 870.3 871.3 DAY 2 15 27 16 20 5 18 30 20 26 30 1 MIN. QFE PRESSURE IN HPA 849.9 849.3 845.3 851.5 850.6 849.3 850.5 851.8 851.5 856.1 853.1 857.1 845.3 DAY 11 10 12 20 7 29 6 23 9 22 19 19 MEAN QNH PRESSURE IN HPA 1008.0 1004.5 1004.4 1006.3 1005.6 1003.1 1001.9 1003.1 1006.5 1010.4 1009.1 1011.8 1006.2 MAX. QNH PRESSURE IN HPA 1020.3 1017.1 1016.5 1012.0 1010.0 1010.1 1008.5 1010.8 1012.5 1019.2 1018.5 1019.2 1020.3 DAY 2 15 27 16 20 5 18 30 20 26 30 1 MIN. QNH PRESSURE IN HPA 996.0 995.3 990.8 997.8 996.8 995.3 996.7 998.1 997.8 1003.0 999.6 1004.2 990.8 DAY 11 10 12 20 7 29 6 23 9 22 19 19 MEAN QFF PRESSURE IN HPA 1012.1 1006.5 1006.3 1003.2 999.3 994.3 991.6 993.0 998.8 1006.4 1010.4 1018.5 1003.4 MAX. QFF PRESSURE IN HPA 1026.3 1020.5 1017.4 1009.7 1002.7 1001.6 998.3 1000.5 1007.1 1019.2 1029.0 1029.3 1029.3 DAY 2 15 9 1 31 5 20 30 20 26 30 1 MIN. QFF PRESSURE IN HPA 998.4 996.4 990.1 993.1 991.5 984.6 986.2 988.7 988.9 998.9 999.6 1009.2 984.6 DAY 23 23 12 19 7 29 10 23 9 6 19 19 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 860.2 857.5 857.4 859.0 858.6 856.4 855.6 856.7 859.7 862.8 860.9 863.7 859.0 MAX. QFE PRESSURE IN HPA 871.3 868.7 867.9 864.0 862.7 862.1 861.4 863.6 864.7 870.5 869.1 870.5 871.3 DAY 2 15 27 16 17 5 18 30 20 25 30 4 MIN. QFE PRESSURE IN HPA 850.5 849.5 844.4 851.8 851.3 849.9 851.1 852.3 853.1 856.9 846.3 857.0 844.4 DAY 11 23 12 19 7 29 6 23 8 22 4 19 MEAN QNH PRESSURE IN HPA 1007.7 1004.6 1004.5 1006.3 1005.8 1003.4 1002.5 1003.8 1007.1 1010.7 1008.5 1011.7 1006.4 MAX. QNH PRESSURE IN HPA 1020.3 1017.4 1016.5 1012.0 1010.5 1009.9 1009.1 1011.6 1012.8 1019.4 1017.8 1019.4 1020.3 DAY 2 15 27 16 17 5 18 30 20 25 30 4 MIN. QNH PRESSURE IN HPA 996.7 995.5 989.7 998.1 997.6 996.0 997.3 998.7 999.6 1003.9 991.9 1004.1 989.7 DAY 11 23 12 19 7 29 6 23 8 22 4 19 MEAN QFF PRESSURE IN HPA 1010.8 1005.6 1005.8 1002.8 998.9 994.4 991.9 993.1 998.5 1005.4 1008.8 1017.3 1002.8 MAX. QFF PRESSURE IN HPA 1025.6 1019.1 1017.6 1009.2 1002.9 1000.8 998.3 1000.4 1006.9 1018.8 1025.6 1026.9 1026.9 DAY 2 15 9 15 31 5 29 30 20 26 30 1 MIN. QFF PRESSURE IN HPA 998.4 995.4 989.4 992.1 991.5 984.8 987.1 988.8 988.6 997.3 988.9 1008.6 984.8 DAY 11 23 12 19 7 29 10 23 8 6 4 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 M MEANS AND EXTREMES FOR THE YEAR 1954 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.3 0.8 5.2 10.4 17.1 22.8 25.3 25.5 20.4 14.8 7.8 2.0 12.6 MINIMUN AIR TEMPERATURE (C) -4.8 -1.9 1.6 6.3 12.1 16.6 18.7 18.5 15.0 9.5 4.5 -0.1 8.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 2 1 0 0 0 5 DAYS WITH MINIMUM TEMP. <=-4 19 5 3 0 0 0 0 0 0 0 0 0 27 DAYS WITH FREEZING MIN.<= 0 28 24 9 0 0 0 0 0 0 0 1 11 73 TEMPERATURE RECORDS LOWEST(C) -11.0 -8.0 -5.0 1.0 6.0 14.0 17.0 12.0 12.0 7.0 0.0 -2.0 -11.0 DAY 14 17 2 3 18 10 3 1 16 21 28 7 MAXIMUM AIR TEMPERATURE (C) 4.1 4.8 9.7 15.0 23.0 29.6 32.3 32.7 27.5 22.2 13.1 5.7 18.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 15 29 30 10 0 0 0 84 DAYS WITH MAXIMUM TEMP. <= 0 3 0 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 9.0 10.0 18.0 22.0 28.0 32.0 36.0 36.0 36.0 28.0 18.0 10.0 36.0 DAY 26 1 30 23 25 14 16 30 1 2 2 9 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 6.7 8.1 8.7 10.9 13.0 13.6 14.2 12.5 12.7 8.6 5.8 10.3 MEAN DAILY TEMP. (MDT) (C) -0.3 1.5 5.7 10.6 17.5 23.1 25.5 25.6 21.3 15.9 8.8 2.8 13.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.5 62.5 139.0 143.0 41.0 0.0 0.0 0.0 389.0 HEATING DEG. DAYS(BASE 18 0C) 568.5 462.5 382.0 221.0 47.0 0.0 0.0 0.0 3.5 70.0 275.5 243.5 2273.5 DEWPOINT (MEAN C) -5.5 -3.0 0.2 2.3 6.4 11.4 12.4 11.9 10.2 5.0 2.7 -1.2 4.4 MIXING RATIO (G/KG) 3.06 3.61 4.63 5.36 7.25 10.06 10.77 10.51 9.28 6.48 5.51 4.09 6.72 VAPOUR PRESSURE (HPA) 4.19 4.94 6.35 7.31 9.89 13.62 14.55 14.23 12.62 8.89 7.57 5.64 9.15 SATURATION DEF. (HPA) 1.59 1.69 2.84 5.88 10.45 15.13 18.82 19.64 12.53 8.68 3.46 1.50 8.52 RELATIVE HUMIDITY (MEAN %) 75 77 72 61 53 50 47 45 55 55 72 80 62 RELATIVE HUMIDITY (MAX. %) 88 89 87 76 71 67 64 61 69 69 84 87 76 RELATIVE HUMIDITY (MIN. %) 56 59 58 45 34 33 29 28 38 35 53 68 45 RELATIVE HUMIDITY (MEAN% 03UTC) 81 84 81 71 66 65 62 59 66 66 80 84 72 RELATIVE HUMIDITY (MEAN% 09UTC) 65 68 65 51 42 40 37 36 44 41 59 74 52 RELATIVE HUMIDITY (MEAN% 15UTC) 72 76 67 57 46 41 35 37 48 51 72 81 57 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 7.6 53.6 121.3 52.4 35.2 0.2 6.0 0.7 46.4 9.8 36.3 50.8 420.3 DAYS WITH PRECIPITATION >=10 0 1 7 3 2 0 0 0 2 0 1 2 18 DAYS WITH PRECIPITATION >= 5 0 3 9 4 2 0 0 0 3 1 3 5 30 DAYS WITH PRECIPITATION >= 1 4 14 11 8 6 0 2 0 5 3 6 7 66 DAYS WITH PRECIPITATION 8 15 12 15 12 1 4 2 6 5 12 10 102 GREATEST DAILY PRECIPITATION 2.0 13.0 18.0 19.0 13.0 0.2 4.0 0.7 22.0 5.0 14.0 17.0 22.0 DAY 1 10 14 11 3 9 29 5 16 28 24 3 DAY WITH THUNDER STORM 0 0 0 1 2 1 0 4 3 1 0 0 12 DAYS WITH SNOW OR SLEET 4 12 4 3 0 0 0 0 0 0 3 6 32 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 225 225 135 225 225 135 360 90 90 135 225 180 225 PREVAILING WIND SPEED(KNOTS) 9.1 9.1 3.0 6.8 6.5 2.6 2.5 2.5 3.6 3.7 4.5 2.0 7.0 PREVAILING WIND PERCENT 10.9 5.4 2.4 10.0 12.1 4.2 4.4 5.2 3.3 2.4 1.7 0.8 4.2 CALMS PERCENT OF WIND 81.5 92.0 94.4 81.3 78.2 87.9 85.5 84.3 88.3 95.2 94.6 97.6 88.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 218 224 183 208 212 102 0 74 144 205 152 0 204 VECTOR WIND MAGNITUDE(KNOTS) 1.1 0.5 0.2 0.7 0.8 0.1 0.0 0.2 0.2 0.2 0.1 0.0 0.3 WIND STEADINESES (MEAN %) 78.6 83.3 100.0 77.8 66.7 33.3 0.0 40.0 40.0 66.7 50.0 0.0 60.0 WIND SPEED (MEAN KNOTS) 1.4 0.6 0.2 0.9 1.2 0.3 0.4 0.5 0.5 0.3 0.2 0.1 0.5 FASTEST WIND DIRECTION 230 230 180 230 230 180 230 230 230 270 220 220 230 FASTEST WIND SPEED (KNOTS) 24 13 9 18 24 5 9 9 13 13 9 5 24 DAY 12 3 18 23 12 1 2 10 9 4 4 29 DAYS WITH SKY CLEAR (0-2)/8 16 5 6 7 18 30 30 29 27 23 13 9 213 DAYS WITH P.CLOUDY (3-6)/8 12 10 12 12 9 0 1 2 3 5 9 8 83 DAYS WITH CLOUDY (7-8)/8 3 13 13 11 4 0 0 0 0 3 8 14 69 DAYS WITH VISIBILITY =< 2 KM 2 9 3 1 0 0 0 0 0 0 3 5 23 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 855.8 856.4 859.3 856.1 858.3 855.9 855.1 856.6 859.0 862.6 863.5 862.6 858.4 MAX. QFE PRESSURE IN HPA 866.3 869.2 870.7 867.3 867.9 862.1 859.9 863.4 866.5 869.8 869.1 873.5 873.5 DAY-HOUR 17- 6 22- 6 2- 6 30- 6 1- 6 20- 6 11- 6 8-21 30- 6 12- 6 14- 6 16- 6 MIN. QFE PRESSURE IN HPA 844.6 846.5 848.9 850.3 851.4 851.0 848.0 847.6 854.1 853.1 857.2 853.5 844.6 DAY-HOUR 11-12 8-12 24-12 11- 3 27-12 13-15 21-15 10-15 27-12 3- 0 24-12 31- 3 MEAN QNH PRESSURE IN HPA 1002.6 1003.4 1006.7 1003.1 1005.6 1002.8 1001.9 1003.6 1006.3 1010.4 1011.4 1010.4 1005.7 MAX. QNH PRESSURE IN HPA 1014.6 1017.9 1019.6 1015.8 1016.5 1009.9 1007.4 1011.3 1014.9 1018.6 1017.8 1022.8 1022.8 DAY-HOUR 17- 6 22- 6 2- 6 30- 6 1- 6 20- 6 11- 6 8-21 30- 6 12- 6 14- 6 16- 6 MIN. QNH PRESSURE IN HPA 990.0 992.1 994.8 996.4 997.7 997.2 993.8 993.4 1000.8 999.6 1004.3 1000.1 990.0 DAY-HOUR 11-12 8-12 24-12 11- 3 27-12 13-15 21-15 10-15 27-12 3- 0 24-12 31- 3 MEAN QFF PRESSURE IN HPA 1006.7 1006.1 1007.0 1000.2 999.1 993.1 991.0 992.6 997.9 1005.3 1010.2 1013.0 1001.9 MAX. QFF PRESSURE IN HPA 1022.4 1020.8 1024.2 1011.6 1011.7 1001.1 997.2 999.2 1009.0 1013.7 1017.2 1025.2 1025.2 DAY-HOUR 17- 6 22- 6 2- 3 29- 6 1- 3 20- 6 11- 6 8-21 30- 6 12- 6 29- 3 15- 6 MIN. QFF PRESSURE IN HPA 992.3 994.4 993.4 992.8 988.8 987.1 981.4 981.3 990.4 992.0 1002.5 1002.1 981.3 DAY-HOUR 11-12 8-12 24-12 23- 6 27-12 13-15 21-15 10-12 3-12 3- 0 2-12 30-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 856.0 856.5 859.3 856.0 858.8 856.2 855.5 857.0 859.3 862.8 863.7 862.7 858.6 MAX. QFE PRESSURE IN HPA 865.6 868.1 869.8 866.5 867.3 860.6 858.9 860.4 864.9 868.8 868.4 873.3 873.3 DAY 17 22 2 30 1 21 31 31 30 12 14 16 MIN. QFE PRESSURE IN HPA 848.3 848.1 851.1 850.9 853.7 852.9 849.8 850.5 855.1 853.1 857.3 853.7 848.1 DAY 28 9 25 11 28 9 22 10 27 3 24 31 MEAN QNH PRESSURE IN HPA 1002.9 1003.5 1006.7 1003.0 1006.1 1003.2 1002.4 1004.0 1006.7 1010.6 1011.7 1010.5 1005.9 MAX. QNH PRESSURE IN HPA 1013.8 1016.7 1018.6 1014.9 1015.8 1008.2 1006.2 1007.9 1013.0 1017.5 1017.0 1022.6 1022.6 DAY 17 22 2 30 1 21 31 31 30 12 14 16 MIN. QNH PRESSURE IN HPA 994.2 993.9 997.3 997.1 1000.3 999.4 995.9 996.7 1001.9 999.6 1004.4 1000.3 993.9 DAY 28 9 25 11 28 9 22 10 27 3 24 31 MEAN QFF PRESSURE IN HPA 1006.5 1005.6 1006.8 999.9 999.4 993.2 991.3 992.7 997.9 1004.8 1009.9 1012.4 1001.7 MAX. QFF PRESSURE IN HPA 1019.9 1018.5 1022.5 1009.6 1010.5 999.4 996.2 996.3 1005.9 1011.3 1016.9 1021.8 1022.5 DAY 17 22 2 30 1 21 31 22 30 12 29 15 MIN. QFF PRESSURE IN HPA 994.5 997.3 996.7 994.8 990.9 988.8 983.8 984.5 992.4 992.0 1003.2 1002.2 983.8 DAY 28 9 25 1 27 9 22 10 3 3 24 31 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 856.0 856.6 859.4 856.1 858.8 856.7 856.0 857.6 859.8 863.2 863.8 862.7 858.9 MAX. QFE PRESSURE IN HPA 865.8 868.5 870.3 866.7 867.5 861.5 859.5 861.1 865.6 869.1 868.6 873.1 873.1 DAY 17 22 2 30 1 21 11 22 30 13 14 16 MIN. QFE PRESSURE IN HPA 847.9 848.1 851.7 850.3 853.8 853.1 850.3 850.8 855.0 856.4 857.7 853.5 847.9 DAY 21 8 18 11 27 9 22 10 27 4 24 31 MEAN QNH PRESSURE IN HPA 1002.9 1003.6 1006.7 1003.1 1006.1 1003.7 1003.0 1004.8 1007.3 1011.1 1011.8 1010.6 1006.2 MAX. QNH PRESSURE IN HPA 1014.1 1017.1 1019.2 1015.1 1016.0 1009.2 1006.9 1008.7 1013.8 1017.8 1017.2 1022.4 1022.4 DAY 17 22 2 30 1 21 11 22 30 13 14 16 MIN. QNH PRESSURE IN HPA 993.7 993.9 998.0 996.4 1000.4 999.6 996.4 997.0 1001.8 1003.4 1004.9 1000.1 993.7 DAY 21 8 18 11 27 9 22 10 27 4 24 31 MEAN QFF PRESSURE IN HPA 1007.7 1006.8 1007.7 1000.9 1000.4 994.6 992.5 994.3 999.5 1006.9 1011.2 1013.4 1003.0 MAX. QFF PRESSURE IN HPA 1021.5 1019.6 1024.2 1011.2 1011.7 1000.9 996.8 998.3 1007.9 1013.4 1017.2 1023.8 1024.2 DAY 17 22 2 29 1 21 11 26 30 12 29 15 MIN. QFF PRESSURE IN HPA 995.7 997.6 997.3 994.5 991.9 990.1 985.0 986.0 993.8 996.8 1004.4 1002.3 985.0 DAY 21 8 18 23 27 9 22 10 3 4 24 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 856.3 856.8 860.1 856.6 859.1 857.1 856.3 857.9 860.3 863.7 864.4 863.2 859.3 MAX. QFE PRESSURE IN HPA 866.3 869.2 870.7 867.3 867.9 862.1 859.9 861.7 866.5 869.8 869.1 873.5 873.5 DAY 17 22 2 30 1 20 11 31 30 12 14 16 MIN. QFE PRESSURE IN HPA 846.7 848.0 851.8 850.7 853.2 853.5 851.0 850.6 855.3 856.1 857.7 854.9 846.7 DAY 21 8 18 11 27 24 22 10 27 3 24 31 MEAN QNH PRESSURE IN HPA 1003.3 1003.9 1007.6 1003.7 1006.4 1004.2 1003.3 1005.1 1007.8 1011.7 1012.4 1011.1 1006.7 MAX. QNH PRESSURE IN HPA 1014.6 1017.9 1019.6 1015.8 1016.5 1009.9 1007.4 1009.4 1014.9 1018.6 1017.8 1022.8 1022.8 DAY 17 22 2 30 1 20 11 31 30 12 14 16 MIN. QNH PRESSURE IN HPA 992.3 993.8 998.1 996.9 999.7 1000.1 997.2 996.8 1002.1 1003.0 1004.9 1001.7 992.3 DAY 21 8 18 11 27 24 22 10 27 3 24 31 MEAN QFF PRESSURE IN HPA 1008.0 1007.0 1008.2 1000.9 1000.1 994.7 992.4 994.4 999.8 1007.1 1011.7 1013.9 1003.2 MAX. QFF PRESSURE IN HPA 1022.4 1020.8 1024.1 1011.6 1011.4 1001.1 997.2 998.5 1009.0 1013.7 1017.1 1025.2 1025.2 DAY 17 22 2 29 1 20 11 26 30 12 14 15 MIN. QFF PRESSURE IN HPA 994.5 997.2 996.6 992.8 990.9 989.9 984.9 984.8 993.8 996.3 1004.7 1003.9 984.8 DAY 21 8 24 23 27 9 22 10 27 3 24 31 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 855.7 856.5 860.1 856.4 858.6 856.5 855.7 857.3 859.4 862.9 863.6 862.5 858.8 MAX. QFE PRESSURE IN HPA 866.1 868.7 870.1 866.7 867.0 861.7 859.2 861.1 865.5 869.1 868.1 872.5 872.5 DAY 17 22 2 29 1 20 11 31 30 12 14 16 MIN. QFE PRESSURE IN HPA 846.3 847.3 851.3 851.0 852.1 853.2 850.4 849.5 855.0 855.4 857.5 854.8 846.3 DAY 11 8 18 11 27 9 22 10 27 2 24 28 MEAN QNH PRESSURE IN HPA 1002.5 1003.5 1007.5 1003.4 1005.9 1003.5 1002.6 1004.4 1006.8 1010.7 1011.6 1010.3 1006.1 MAX. QNH PRESSURE IN HPA 1014.4 1017.4 1019.0 1015.1 1015.4 1009.4 1006.6 1008.7 1013.7 1017.8 1016.7 1021.7 1021.7 DAY 17 22 2 29 1 20 11 31 30 12 14 16 MIN. QNH PRESSURE IN HPA 991.9 993.0 997.6 997.2 998.5 999.7 996.6 995.5 1001.8 1002.2 1004.6 1001.6 991.9 DAY 11 8 18 11 27 9 22 10 27 2 24 28 MEAN QFF PRESSURE IN HPA 1005.9 1005.9 1007.5 1000.2 998.9 993.6 991.4 993.0 997.9 1004.8 1009.7 1012.7 1001.8 MAX. QFF PRESSURE IN HPA 1020.3 1019.7 1022.2 1010.3 1009.8 1000.4 996.4 997.2 1006.8 1012.2 1015.9 1023.7 1023.7 DAY 17 22 2 29 1 20 11 26 30 12 28 15 MIN. QFF PRESSURE IN HPA 994.0 995.4 996.2 993.5 988.8 989.4 983.9 982.7 991.1 994.6 1003.8 1003.4 982.7 DAY 11 8 24 23 27 14 22 10 6 2 2 30 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 855.0 855.5 858.8 855.6 857.7 855.3 854.4 855.8 857.9 861.6 862.6 862.0 857.7 MAX. QFE PRESSURE IN HPA 865.3 866.3 868.7 865.5 865.8 860.9 858.3 859.7 863.8 867.5 867.2 871.4 871.4 DAY 17 22 2 29 1 20 31 26 30 12 13 15 MIN. QFE PRESSURE IN HPA 844.6 846.5 848.9 850.7 851.4 851.6 848.9 847.7 854.1 853.9 857.2 853.9 844.6 DAY 11 8 24 6 27 9 22 10 27 2 24 6 MEAN QNH PRESSURE IN HPA 1001.8 1002.4 1006.1 1002.5 1004.8 1002.1 1001.2 1002.7 1005.1 1009.3 1010.5 1009.7 1004.8 MAX. QNH PRESSURE IN HPA 1013.5 1014.6 1017.4 1013.7 1014.1 1008.5 1005.5 1007.1 1011.8 1016.0 1015.7 1020.4 1020.4 DAY 17 22 2 29 1 20 31 26 30 12 13 15 MIN. QNH PRESSURE IN HPA 990.0 992.1 994.8 996.9 997.7 997.9 994.8 993.5 1000.8 1000.5 1004.3 1000.5 990.0 DAY 11 8 24 6 27 9 22 10 27 2 24 6 MEAN QFF PRESSURE IN HPA 1005.1 1004.6 1005.9 999.3 998.1 992.1 989.9 991.2 996.2 1003.5 1008.7 1012.2 1000.6 MAX. QFF PRESSURE IN HPA 1019.0 1016.7 1020.5 1009.2 1008.4 999.5 995.2 995.8 1005.1 1010.1 1015.5 1022.7 1022.7 DAY 17 22 2 29 1 20 11 26 30 12 28 15 MIN. QFF PRESSURE IN HPA 992.3 994.4 993.4 993.8 988.8 987.7 982.2 981.3 990.4 993.5 1002.5 1002.1 981.3 DAY 11 8 24 1 27 13 21 10 3 2 2 30 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 855.6 856.3 859.0 855.8 857.8 854.7 853.8 855.1 857.8 861.8 863.0 862.4 857.8 MAX. QFE PRESSURE IN HPA 864.7 866.7 868.6 865.8 866.5 860.2 857.7 859.1 863.3 867.8 867.6 873.3 873.3 DAY 16 22 2 29 1 20 31 26 30 12 13 15 MIN. QFE PRESSURE IN HPA 846.8 847.7 849.5 851.1 851.9 851.0 848.0 847.6 854.3 854.1 857.8 854.3 846.8 DAY 11 8 24 6 27 13 21 10 3 2 23 30 MEAN QNH PRESSURE IN HPA 1002.5 1003.3 1006.3 1002.7 1004.9 1001.4 1000.5 1001.9 1004.9 1009.5 1010.9 1010.2 1004.9 MAX. QNH PRESSURE IN HPA 1012.8 1015.1 1017.2 1014.1 1014.9 1007.7 1004.9 1006.4 1011.2 1016.3 1016.1 1022.6 1022.6 DAY 16 22 2 29 1 20 31 26 30 12 13 15 MIN. QNH PRESSURE IN HPA 992.5 993.5 995.5 997.3 998.3 997.2 993.8 993.4 1001.0 1000.8 1005.0 1001.0 992.5 DAY 11 8 24 6 27 13 21 10 3 2 23 30 MEAN QFF PRESSURE IN HPA 1007.2 1006.4 1007.1 1000.4 999.1 992.1 989.8 991.3 997.1 1005.2 1010.2 1013.0 1001.6 MAX. QFF PRESSURE IN HPA 1020.2 1017.7 1022.0 1010.4 1010.3 999.0 994.6 995.8 1005.7 1011.9 1016.8 1019.8 1022.0 DAY 17 22 2 29 1 20 11 26 30 12 28 10 MIN. QFF PRESSURE IN HPA 995.1 996.9 994.8 994.2 990.6 987.1 981.4 982.8 990.7 994.9 1004.0 1003.2 981.4 DAY 27 8 24 1 27 13 21 10 2 2 23 30 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 855.7 856.4 859.0 856.1 858.0 855.2 854.4 855.8 858.5 862.2 863.3 862.5 858.1 MAX. QFE PRESSURE IN HPA 865.1 867.2 868.4 866.1 865.7 859.9 858.2 859.5 863.2 868.1 868.1 873.3 873.3 DAY 16 21 2 29 1 20 31 26 30 11 13 15 MIN. QFE PRESSURE IN HPA 847.1 847.6 849.5 850.7 852.0 851.9 848.9 848.6 854.9 854.1 857.4 854.0 847.1 DAY 27 8 24 8 27 13 21 10 6 2 23 30 MEAN QNH PRESSURE IN HPA 1002.6 1003.4 1006.4 1003.1 1005.2 1002.1 1001.2 1002.7 1005.7 1009.9 1011.2 1010.3 1005.3 MAX. QNH PRESSURE IN HPA 1013.3 1015.7 1017.0 1014.4 1014.0 1007.4 1005.4 1006.9 1011.1 1016.7 1016.7 1022.6 1022.6 DAY 16 21 2 29 1 20 31 26 30 11 13 15 MIN. QNH PRESSURE IN HPA 992.8 993.4 995.5 996.9 998.4 998.3 994.8 994.5 1001.7 1000.8 1004.5 1000.6 992.8 DAY 27 8 24 8 27 13 21 10 6 2 23 30 MEAN QFF PRESSURE IN HPA 1007.2 1006.5 1006.8 1000.3 998.9 992.5 990.3 991.9 997.9 1005.4 1010.5 1013.3 1001.8 MAX. QFF PRESSURE IN HPA 1020.9 1018.3 1021.5 1009.5 1008.9 999.1 995.2 996.6 1005.7 1011.7 1017.0 1019.7 1021.5 DAY 16 21 2 29 1 21 30 26 30 11 28 14 MIN. QFF PRESSURE IN HPA 994.2 996.8 994.5 994.9 990.3 987.2 982.4 983.3 991.3 995.0 1003.7 1002.8 982.4 DAY 27 8 24 1 27 13 21 10 3 2 23 30 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 855.8 856.5 858.9 856.3 858.2 855.6 855.0 856.7 858.9 862.5 863.5 862.6 858.4 MAX. QFE PRESSURE IN HPA 865.3 867.7 868.5 866.4 864.4 859.9 858.5 863.4 864.1 868.5 868.1 873.3 873.3 DAY 16 21 1 30 1 21 31 8 29 11 13 15 MIN. QFE PRESSURE IN HPA 847.6 847.9 850.3 851.1 852.5 852.5 849.3 849.2 855.2 853.7 857.3 854.1 847.6 DAY 27 8 24 8 27 8 21 10 26 2 23 30 MEAN QNH PRESSURE IN HPA 1002.7 1003.5 1006.3 1003.2 1005.4 1002.5 1001.7 1003.7 1006.2 1010.3 1011.4 1010.4 1005.6 MAX. QNH PRESSURE IN HPA 1013.5 1016.2 1017.1 1014.7 1012.5 1007.4 1005.8 1011.3 1012.1 1017.1 1016.7 1022.6 1022.6 DAY 16 21 1 30 1 21 31 8 29 11 13 15 MIN. QNH PRESSURE IN HPA 993.4 993.7 996.4 997.3 998.9 998.9 995.3 995.2 1002.0 1000.3 1004.4 1000.8 993.4 DAY 27 8 24 8 27 8 21 10 26 2 23 30 MEAN QFF PRESSURE IN HPA 1006.1 1005.9 1006.1 1000.1 998.3 992.6 990.5 992.4 997.5 1004.5 1009.7 1012.8 1001.4 MAX. QFF PRESSURE IN HPA 1019.0 1017.7 1020.8 1009.2 1006.4 998.8 995.3 999.2 1005.1 1011.3 1016.9 1020.8 1020.8 DAY 16 21 1 30 1 21 11 8 29 12 28 14 MIN. QFF PRESSURE IN HPA 993.7 996.6 995.4 994.6 989.7 988.3 983.0 983.2 991.7 992.8 1003.1 1002.7 983.0 DAY 27 8 24 1 27 8 21 10 2 2 23 30 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.7 5.1 7.1 12.4 15.8 21.7 24.9 24.8 20.7 14.7 6.8 1.9 13.0 MINIMUN AIR TEMPERATURE (C) -2.7 0.5 3.0 7.1 10.2 14.7 17.8 17.5 14.0 8.8 3.6 -0.8 7.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 2 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 11 2 0 0 0 0 0 0 0 0 0 2 15 DAYS WITH FREEZING MIN.<= 0 31 15 3 0 0 0 0 0 0 0 3 23 75 TEMPERATURE RECORDS LOWEST(C) -7.0 -4.0 -1.0 2.0 3.0 9.0 17.0 14.0 11.0 7.0 -1.0 -6.0 -7.0 DAY 7 2 5 10 5 10 1 18 29 12 25 5 MAXIMUM AIR TEMPERATURE (C) 6.3 11.7 12.1 18.4 22.1 28.5 31.8 32.2 28.6 23.3 12.4 6.7 19.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 13 26 24 14 0 0 0 77 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 12.0 21.0 22.0 25.0 29.0 34.0 36.0 38.0 32.0 28.0 21.0 11.0 38.0 DAY 16 28 31 3 31 18 11 13 6 7 2 13 DIF. BETWEEN (MAX.-MIN.) (C) 9.0 11.2 9.1 11.3 11.9 13.8 14.0 14.7 14.6 14.5 8.8 7.5 11.7 MEAN DAILY TEMP. (MDT) (C) 1.8 6.1 7.6 12.7 16.2 21.6 24.8 24.9 21.3 16.0 8.0 3.0 13.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.5 45.5 118.5 119.5 29.0 0.0 0.0 0.0 313.0 HEATING DEG. DAYS(BASE 18 0C) 502.5 333.0 313.0 160.0 76.5 9.5 0.0 0.0 8.0 65.5 300.0 466.0 2234.0 DEWPOINT (MEAN C) -3.0 -1.9 -0.8 2.8 7.6 9.2 12.2 10.5 9.3 5.1 2.0 -2.1 4.2 MIXING RATIO (G/KG) 3.59 3.92 4.29 5.63 7.75 8.76 10.71 9.76 8.83 6.50 5.25 3.86 6.57 VAPOUR PRESSURE (HPA) 4.96 5.37 5.87 7.68 10.57 11.89 14.44 13.18 12.00 8.92 7.20 5.30 8.95 SATURATION DEF. (HPA) 1.65 3.91 4.60 7.50 8.33 15.40 18.19 19.54 13.66 8.74 3.07 1.86 8.87 RELATIVE HUMIDITY (MEAN %) 78 63 61 55 61 48 48 44 50 55 73 76 59 RELATIVE HUMIDITY (MAX. %) 88 81 80 74 79 65 63 60 64 70 83 87 75 RELATIVE HUMIDITY (MIN. %) 58 40 41 38 43 31 32 27 33 33 57 61 41 RELATIVE HUMIDITY (MEAN% 03UTC) 85 78 73 68 76 62 62 56 61 66 80 83 71 RELATIVE HUMIDITY (MEAN% 09UTC) 66 47 48 45 50 41 40 39 42 40 64 65 49 RELATIVE HUMIDITY (MEAN% 15UTC) 76 59 55 49 52 37 37 33 43 52 73 75 53 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 5.1 4.4 45.2 82.8 96.5 20.5 10.1 0.0 0.5 0.0 126.1 12.8 404.0 DAYS WITH PRECIPITATION >=10 0 0 1 2 3 1 0 0 0 0 7 0 14 DAYS WITH PRECIPITATION >= 5 1 0 3 5 6 1 1 0 0 0 9 1 27 DAYS WITH PRECIPITATION >= 1 1 3 8 9 12 1 2 0 0 0 10 3 49 DAYS WITH PRECIPITATION 3 4 13 12 15 4 4 0 1 1 11 7 75 GREATEST DAILY PRECIPITATION 5.0 2.2 18.0 44.0 36.0 20.0 8.0 0.0 0.5 0.0 25.0 7.0 44.0 DAY 26 23 23 20 21 22 22 ** 28 ** 24 25 DAY WITH THUNDER STORM 0 0 0 1 9 3 3 0 1 0 0 0 17 DAYS WITH SNOW OR SLEET 2 0 2 0 0 0 0 0 0 0 1 5 10 DAYS WITH DUST 0 0 1 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 225 225 225 225 225 225 90 45 45 90 225 225 225 PREVAILING WIND SPEED(KNOTS) 5.5 9.3 8.7 11.4 5.3 4.6 2.7 3.2 2.5 2.0 10.8 6.3 8.1 PREVAILING WIND PERCENT 1.6 9.8 14.5 16.3 4.4 5.8 4.0 4.4 5.4 1.6 2.5 4.0 5.9 CALMS PERCENT OF WIND 96.8 82.6 81.9 64.2 83.5 76.7 80.2 82.3 85.4 96.0 93.3 94.4 84.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 212 217 227 216 186 290 273 114 60 142 207 227 218 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.9 1.2 1.8 0.3 0.2 0.1 0.1 0.2 0.1 0.3 0.2 0.4 WIND STEADINESES (MEAN %) 100.0 75.0 85.7 72.0 50.0 18.2 12.5 16.7 40.0 100.0 60.0 66.7 50.0 WIND SPEED (MEAN KNOTS) 0.1 1.2 1.4 2.5 0.6 1.1 0.8 0.6 0.5 0.1 0.5 0.3 0.8 FASTEST WIND DIRECTION 230 230 230 230 230 300 230 50 90 130 230 230 230 FASTEST WIND SPEED (KNOTS) 7 24 37 30 9 27 9 9 9 5 18 9 37 DAY 16 22 3 6 3 5 2 16 15 6 22 9 DAYS WITH SKY CLEAR (0-2)/8 18 17 6 14 15 25 29 29 28 24 11 10 226 DAYS WITH P.CLOUDY (3-6)/8 7 7 18 10 14 4 2 2 2 6 8 12 92 DAYS WITH CLOUDY (7-8)/8 6 4 7 6 2 1 0 0 0 1 11 9 47 DAYS WITH VISIBILITY =< 2 KM 1 2 1 0 0 0 0 0 0 0 0 1 5 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 863.0 858.3 856.1 858.0 859.2 856.8 853.5 854.4 858.3 862.7 861.1 859.1 858.4 MAX. QFE PRESSURE IN HPA 870.3 866.1 865.7 864.7 868.7 862.7 859.6 866.5 866.1 867.9 868.6 872.2 872.2 DAY-HOUR 9- 6 8- 6 22- 6 1- 6 8- 6 11- 9 9- 6 3- 9 30- 6 19- 6 16- 6 2- 6 MIN. QFE PRESSURE IN HPA 856.5 846.5 844.2 849.3 850.1 849.9 846.7 844.5 851.3 854.7 848.2 846.1 844.2 DAY-HOUR 26-15 23- 3 17-12 9-15 3-12 29-15 28-15 4- 9 1-15 6-12 24- 3 1- 9 MEAN QNH PRESSURE IN HPA 1010.9 1005.5 1003.0 1005.2 1006.6 1003.8 1000.1 1001.1 1005.5 1010.6 1008.7 1006.4 1005.6 MAX. QNH PRESSURE IN HPA 1019.2 1014.4 1014.0 1012.8 1017.4 1010.5 1007.0 1014.9 1014.4 1016.5 1017.2 1021.3 1021.3 DAY-HOUR 9- 6 8- 6 22- 6 1- 6 8- 6 11- 9 9- 6 3- 9 30- 6 19- 6 16- 6 2- 6 MIN. QNH PRESSURE IN HPA 1003.5 992.1 989.5 995.3 996.2 996.0 992.3 989.8 997.6 1001.4 994.1 991.7 989.5 DAY-HOUR 26-15 23- 3 17-12 9-15 3-12 29-15 28-15 4- 9 1-15 6-12 24- 3 1- 9 MEAN QFF PRESSURE IN HPA 1014.0 1005.9 1002.1 1001.3 1000.8 994.9 989.4 990.4 997.0 1005.5 1008.0 1008.6 1001.5 MAX. QFF PRESSURE IN HPA 1024.8 1016.9 1014.0 1011.4 1013.5 1004.5 996.1 1004.2 1009.9 1013.0 1018.5 1026.0 1026.0 DAY-HOUR 9- 6 8- 6 22- 6 23- 6 8- 6 22- 6 9- 6 3- 9 30- 6 14- 6 16- 6 2- 6 MIN. QFF PRESSURE IN HPA 1005.8 991.3 988.4 991.3 990.1 985.2 981.9 978.3 988.3 994.3 993.7 992.1 978.3 DAY-HOUR 26-12 22-21 17-12 7- 0 25-12 29-15 28-15 4- 9 1-12 6-12 23- 9 1- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 863.0 858.6 856.3 858.1 859.3 857.1 854.0 854.8 858.5 863.0 861.2 859.3 858.6 MAX. QFE PRESSURE IN HPA 869.1 865.1 863.3 863.6 865.7 861.7 858.8 860.1 865.5 866.9 867.8 870.9 870.9 DAY 9 8 21 2 8 2 9 21 30 19 17 2 MIN. QFE PRESSURE IN HPA 857.2 847.3 846.3 850.2 851.6 850.9 849.5 849.5 852.9 857.0 849.3 851.7 846.3 DAY 26 23 13 10 3 28 29 15 28 7 24 18 MEAN QNH PRESSURE IN HPA 1010.9 1005.9 1003.2 1005.3 1006.7 1004.2 1000.6 1001.6 1005.7 1010.9 1008.9 1006.6 1005.9 MAX. QNH PRESSURE IN HPA 1017.8 1013.3 1011.2 1011.6 1014.0 1009.4 1006.1 1007.6 1013.7 1015.3 1016.3 1019.9 1019.9 DAY 9 8 21 2 8 2 9 21 30 19 17 2 MIN. QNH PRESSURE IN HPA 1004.3 993.0 991.9 996.3 997.9 997.1 995.5 995.5 999.4 1004.1 995.3 998.0 991.9 DAY 26 23 13 10 3 28 29 15 28 7 24 18 MEAN QFF PRESSURE IN HPA 1013.3 1005.7 1002.1 1001.0 1000.7 995.0 989.6 990.7 996.6 1005.0 1007.5 1008.3 1001.3 MAX. QFF PRESSURE IN HPA 1021.4 1013.2 1011.0 1008.7 1009.2 1003.7 994.7 998.0 1008.3 1010.3 1016.4 1023.5 1023.5 DAY 9 8 22 13 9 23 9 21 30 14 12 2 MIN. QFF PRESSURE IN HPA 1006.1 991.9 992.0 991.3 991.3 986.1 984.6 982.5 990.3 996.8 994.2 997.4 982.5 DAY 26 23 4 7 25 28 29 15 1 7 23 18 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 863.1 858.8 856.5 858.4 859.7 857.5 854.4 855.4 859.0 863.3 861.4 859.3 858.9 MAX. QFE PRESSURE IN HPA 869.6 865.7 864.5 864.7 867.5 861.9 859.1 861.1 865.7 867.3 867.9 871.5 871.5 DAY 9 8 22 2 8 1 9 21 30 19 17 2 MIN. QFE PRESSURE IN HPA 857.1 846.5 848.7 850.4 851.3 852.7 850.1 849.7 852.7 857.3 848.2 851.3 846.5 DAY 26 23 13 10 3 30 29 15 28 7 24 18 MEAN QNH PRESSURE IN HPA 1011.1 1006.1 1003.5 1005.7 1007.1 1004.6 1001.1 1002.3 1006.4 1011.3 1009.0 1006.7 1006.2 MAX. QNH PRESSURE IN HPA 1018.4 1014.0 1012.6 1012.8 1016.0 1009.6 1006.4 1008.7 1014.0 1015.8 1016.5 1020.5 1020.5 DAY 9 8 22 2 8 1 9 21 30 19 17 2 MIN. QNH PRESSURE IN HPA 1004.2 992.1 994.6 996.6 997.6 999.2 996.2 995.8 999.2 1004.4 994.1 997.6 992.1 DAY 26 23 13 10 3 30 29 15 28 7 24 18 MEAN QFF PRESSURE IN HPA 1014.7 1007.3 1003.2 1002.6 1002.0 996.3 990.9 992.1 998.7 1007.1 1009.0 1009.5 1002.8 MAX. QFF PRESSURE IN HPA 1023.9 1015.8 1013.0 1010.0 1012.5 1003.5 995.9 999.6 1009.3 1012.4 1018.1 1025.2 1025.2 DAY 9 8 22 23 8 23 9 21 30 14 17 2 MIN. QFF PRESSURE IN HPA 1006.3 992.3 994.4 992.4 991.7 988.2 986.0 983.6 992.2 997.9 994.7 997.9 983.6 DAY 26 23 4 7 25 30 29 15 1 7 23 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 863.8 859.0 857.2 859.1 860.3 857.9 854.7 855.8 859.7 863.9 862.0 859.9 859.4 MAX. QFE PRESSURE IN HPA 870.3 866.1 865.7 864.7 868.7 862.4 859.6 861.7 866.1 867.9 868.6 872.2 872.2 DAY 9 8 22 1 8 2 9 21 30 19 16 2 MIN. QFE PRESSURE IN HPA 857.8 847.9 849.9 852.5 852.7 853.4 850.1 850.1 853.7 858.2 848.8 851.3 847.9 DAY 26 23 13 22 3 29 29 15 1 7 24 18 MEAN QNH PRESSURE IN HPA 1011.8 1006.3 1004.2 1006.4 1007.8 1005.1 1001.4 1002.7 1007.1 1011.9 1009.7 1007.3 1006.8 MAX. QNH PRESSURE IN HPA 1019.2 1014.4 1014.0 1012.8 1017.4 1010.2 1007.0 1009.4 1014.4 1016.5 1017.2 1021.3 1021.3 DAY 9 8 22 1 8 2 9 21 30 19 16 2 MIN. QNH PRESSURE IN HPA 1005.0 993.7 996.0 998.9 999.2 1000.0 996.2 996.2 1000.3 1005.4 994.7 997.6 993.7 DAY 26 23 13 22 3 29 29 15 1 7 24 18 MEAN QFF PRESSURE IN HPA 1015.7 1007.4 1003.6 1002.7 1002.2 996.2 990.8 992.2 999.0 1007.6 1009.6 1010.1 1003.1 MAX. QFF PRESSURE IN HPA 1024.8 1016.9 1014.0 1011.4 1013.5 1004.5 996.1 1000.0 1009.9 1013.0 1018.5 1026.0 1026.0 DAY 9 8 22 23 8 22 9 21 30 14 16 2 MIN. QFF PRESSURE IN HPA 1007.3 994.6 994.8 993.8 991.7 989.1 986.1 983.8 991.4 999.1 995.3 997.8 983.8 DAY 26 23 3 22 25 29 20 15 1 6 23 18 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 863.5 858.7 856.6 858.6 859.8 857.4 854.2 855.0 858.8 863.3 861.4 858.8 858.8 MAX. QFE PRESSURE IN HPA 870.1 865.7 865.0 864.1 868.5 862.7 859.3 866.5 865.7 866.8 867.7 871.7 871.7 DAY 9 8 22 1 8 11 9 3 29 18 16 2 MIN. QFE PRESSURE IN HPA 857.6 850.7 849.3 851.6 852.5 852.4 849.5 844.5 852.7 856.7 849.5 846.1 844.5 DAY 26 11 12 9 2 29 29 4 1 6 23 1 MEAN QNH PRESSURE IN HPA 1011.4 1005.9 1003.6 1005.9 1007.3 1004.5 1000.9 1001.8 1006.1 1011.2 1009.1 1006.1 1006.2 MAX. QNH PRESSURE IN HPA 1019.0 1014.0 1013.2 1012.1 1017.1 1010.5 1006.7 1014.9 1014.0 1015.2 1016.2 1020.8 1020.8 DAY 9 8 22 1 8 11 9 3 29 18 16 2 MIN. QNH PRESSURE IN HPA 1004.7 996.9 995.3 997.9 998.9 998.8 995.5 989.8 999.2 1003.7 995.5 991.7 989.8 DAY 26 11 12 9 2 29 29 4 1 6 23 1 MEAN QFF PRESSURE IN HPA 1014.0 1005.6 1002.3 1001.6 1001.1 995.2 989.8 990.9 997.0 1005.4 1007.8 1007.7 1001.5 MAX. QFF PRESSURE IN HPA 1023.0 1014.1 1012.1 1010.5 1012.7 1004.2 995.4 1004.2 1009.2 1010.1 1016.2 1025.0 1025.0 DAY 9 8 22 23 8 22 9 3 29 11 12 2 MIN. QFF PRESSURE IN HPA 1007.0 995.0 992.0 993.8 990.3 987.8 984.8 978.3 989.5 996.5 993.7 992.1 978.3 DAY 26 22 3 22 25 29 20 4 1 6 23 1 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 862.3 857.3 854.9 857.5 858.6 856.2 852.8 853.5 857.4 861.8 860.4 858.3 857.6 MAX. QFE PRESSURE IN HPA 868.5 864.3 863.7 862.3 867.3 860.9 858.3 858.5 864.6 865.5 866.9 869.5 869.5 DAY 9 8 21 12 8 1 9 21 29 13 16 2 MIN. QFE PRESSURE IN HPA 856.6 849.3 844.2 850.0 850.1 850.7 848.5 847.1 851.8 854.7 849.9 851.0 844.2 DAY 26 22 17 9 3 29 28 15 1 6 23 18 MEAN QNH PRESSURE IN HPA 1010.1 1004.4 1001.7 1004.7 1005.9 1003.2 999.3 1000.1 1004.5 1009.5 1007.9 1005.6 1004.7 MAX. QNH PRESSURE IN HPA 1017.1 1012.4 1011.7 1010.1 1015.8 1008.5 1005.5 1005.8 1012.7 1013.7 1015.3 1018.3 1018.3 DAY 9 8 21 12 8 1 9 21 29 13 16 2 MIN. QNH PRESSURE IN HPA 1003.6 995.3 989.5 996.1 996.2 996.9 994.4 992.8 998.1 1001.4 996.0 997.2 989.5 DAY 26 22 17 9 3 29 28 15 1 6 23 18 MEAN QFF PRESSURE IN HPA 1012.3 1004.0 1000.5 1000.3 999.7 993.9 988.1 989.0 995.3 1003.5 1006.5 1007.2 1000.0 MAX. QFF PRESSURE IN HPA 1020.5 1012.3 1011.4 1008.6 1010.8 1003.6 993.9 995.6 1007.4 1008.9 1014.4 1022.1 1022.1 DAY 9 8 21 12 8 22 9 21 29 13 11 2 MIN. QFF PRESSURE IN HPA 1005.8 993.0 988.4 992.6 990.1 985.6 983.1 980.2 988.3 994.3 994.3 996.7 980.2 DAY 26 22 17 6 25 29 20 15 1 6 23 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 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 862.8 857.8 855.3 857.3 858.4 855.8 852.2 852.9 857.2 861.9 860.7 858.8 857.6 MAX. QFE PRESSURE IN HPA 869.9 864.0 862.9 862.3 866.1 861.3 857.5 857.7 865.0 865.8 867.3 869.5 869.9 DAY 5 8 22 1 8 1 9 20 29 13 16 2 MIN. QFE PRESSURE IN HPA 856.5 849.0 847.7 849.3 851.3 849.9 846.7 846.5 851.3 855.7 849.7 852.3 846.5 DAY 26 22 12 9 1 29 28 6 1 6 23 28 MEAN QNH PRESSURE IN HPA 1010.7 1004.9 1002.2 1004.3 1005.6 1002.7 998.6 999.4 1004.2 1009.6 1008.3 1006.2 1004.7 MAX. QNH PRESSURE IN HPA 1018.7 1012.0 1010.8 1010.1 1014.4 1008.9 1004.6 1004.9 1013.2 1014.1 1015.8 1018.3 1018.7 DAY 5 8 22 1 8 1 9 20 29 13 16 2 MIN. QNH PRESSURE IN HPA 1003.5 995.0 993.5 995.3 997.6 996.0 992.3 992.1 997.6 1002.6 995.8 998.7 992.1 DAY 26 22 12 9 1 29 28 6 1 6 23 28 MEAN QFF PRESSURE IN HPA 1014.2 1005.9 1001.8 1001.1 1000.3 994.3 988.2 989.1 996.4 1005.3 1008.2 1008.9 1001.1 MAX. QFF PRESSURE IN HPA 1023.6 1013.9 1010.5 1008.7 1009.9 1003.3 994.5 995.7 1008.5 1011.3 1017.0 1022.2 1023.6 DAY 5 8 22 12 8 22 22 17 29 13 16 2 MIN. QFF PRESSURE IN HPA 1006.0 993.9 990.7 994.1 991.4 985.2 981.9 981.4 989.2 996.0 995.2 999.7 981.4 DAY 26 22 3 9 24 29 28 6 1 6 23 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 862.8 858.1 855.7 857.5 858.7 856.2 852.8 853.5 857.6 862.2 860.8 859.0 857.9 MAX. QFE PRESSURE IN HPA 868.4 864.1 862.9 862.9 866.1 861.3 857.9 858.9 865.0 865.9 867.4 869.2 869.2 DAY 8 7 22 1 8 1 9 20 29 13 16 1 MIN. QFE PRESSURE IN HPA 857.0 848.7 847.9 849.4 851.7 850.7 847.8 847.6 852.1 856.0 849.7 852.5 847.6 DAY 25 22 12 9 1 29 28 6 1 6 23 28 MEAN QNH PRESSURE IN HPA 1010.6 1005.3 1002.6 1004.6 1006.0 1003.1 999.2 1000.1 1004.7 1009.9 1008.4 1006.4 1005.1 MAX. QNH PRESSURE IN HPA 1017.0 1012.1 1010.8 1010.8 1014.4 1008.9 1005.1 1006.2 1013.2 1014.2 1015.9 1017.9 1017.9 DAY 8 7 22 1 8 1 9 20 29 13 16 1 MIN. QNH PRESSURE IN HPA 1004.1 994.6 993.7 995.4 998.0 996.9 993.6 993.4 998.5 1002.9 995.8 998.9 993.4 DAY 25 22 12 9 1 29 28 6 1 6 23 28 MEAN QFF PRESSURE IN HPA 1014.4 1006.3 1001.9 1000.9 1000.3 994.2 988.6 989.6 996.7 1005.6 1008.3 1009.1 1001.3 MAX. QFF PRESSURE IN HPA 1022.6 1014.7 1010.3 1008.2 1010.2 1003.5 994.0 996.6 1008.4 1011.0 1017.3 1021.5 1022.6 DAY 8 8 22 12 8 22 8 20 29 13 16 1 MIN. QFF PRESSURE IN HPA 1006.4 993.0 990.8 992.9 991.5 985.6 983.0 982.6 989.6 996.4 994.7 1000.5 982.6 DAY 25 22 3 6 24 29 28 14 1 6 23 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 862.9 858.3 856.1 857.6 859.1 856.6 853.3 854.1 858.1 862.5 861.1 859.1 858.2 MAX. QFE PRESSURE IN HPA 868.8 864.9 862.9 863.3 865.9 861.4 858.3 859.4 865.2 866.2 867.5 870.1 870.1 DAY 8 7 21 1 8 1 8 20 29 13 16 1 MIN. QFE PRESSURE IN HPA 857.1 847.9 848.1 849.7 851.7 851.5 848.6 848.8 852.9 856.5 849.6 852.3 847.9 DAY 25 22 12 9 2 29 28 6 1 6 23 28 MEAN QNH PRESSURE IN HPA 1010.8 1005.6 1003.0 1004.8 1006.4 1003.5 999.9 1000.7 1005.3 1010.4 1008.7 1006.5 1005.5 MAX. QNH PRESSURE IN HPA 1017.5 1013.0 1010.8 1011.2 1014.2 1009.1 1005.5 1006.8 1013.4 1014.5 1016.0 1019.0 1019.0 DAY 8 7 21 1 8 1 8 20 29 13 16 1 MIN. QNH PRESSURE IN HPA 1004.2 993.7 993.9 995.8 998.0 997.8 994.5 994.7 999.4 1003.5 995.6 998.7 993.7 DAY 25 22 12 9 2 29 28 6 1 6 23 28 MEAN QFF PRESSURE IN HPA 1013.3 1005.1 1001.6 1000.4 1000.2 994.4 988.9 990.0 996.5 1004.7 1007.5 1008.1 1000.9 MAX. QFF PRESSURE IN HPA 1021.4 1013.1 1010.1 1008.2 1009.7 1003.7 994.8 997.2 1008.2 1010.2 1016.1 1021.4 1021.4 DAY 8 7 21 12 8 22 9 20 29 13 11 1 MIN. QFF PRESSURE IN HPA 1006.2 991.3 991.0 992.0 990.8 986.3 983.6 982.5 989.9 996.4 994.9 998.8 982.5 DAY 25 22 3 6 24 29 20 14 1 6 23 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION OROOMIEH (40712) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 32 N LONGITUDE 45 5 E DATA PROCESSING CENTER ELEVATION 1315.9 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.6 3.0 3.6 10.8 15.1 20.7 24.6 24.3 17.7 12.8 5.9 -2.2 11.3 MINIMUN AIR TEMPERATURE (C) -3.5 -0.3 0.3 6.6 9.5 14.0 18.1 18.2 12.0 6.8 1.8 -4.4 6.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 16 7 2 2 0 0 0 0 0 0 1 16 44 DAYS WITH FREEZING MIN.<= 0 30 14 14 2 0 0 0 0 0 0 10 27 97 TEMPERATURE RECORDS LOWEST(C) -8.0 -7.0 -8.0 -7.0 4.0 11.0 16.0 17.0 6.0 2.0 -4.0 -12.0 -12.0 DAY 20 1 31 1 7 2 16 9 26 23 13 12 MAXIMUM AIR TEMPERATURE (C) 4.7 8.3 8.3 15.6 21.5 27.7 31.9 31.9 25.5 21.9 13.2 2.0 17.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 8 27 26 4 0 0 0 65 DAYS WITH MAXIMUM TEMP. <= 0 2 0 1 0 0 0 0 0 0 0 0 18 21 TEMPERATURE RECORDS HIGHEST(C) 8.0 14.0 16.0 24.0 27.0 34.0 36.0 38.0 32.0 26.0 21.0 12.0 38.0 DAY 11 22 7 26 31 25 6 4 1 5 6 1 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 8.6 8.0 9.0 12.0 13.7 13.8 13.7 13.5 15.1 11.4 6.4 11.1 MEAN DAILY TEMP. (MDT) (C) 0.6 4.0 4.3 11.1 15.5 20.8 25.0 25.0 18.7 14.4 7.5 -1.2 12.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 29.0 123.5 124.5 10.0 1.0 0.0 0.0 288.0 HEATING DEG. DAYS(BASE 18 0C) 539.5 406.5 411.5 207.0 85.0 7.0 0.0 0.0 34.5 119.5 314.0 595.0 2719.5 DEWPOINT (MEAN C) -4.3 -2.0 -2.3 4.0 5.2 8.0 12.2 11.4 7.9 1.1 -1.2 -5.3 2.9 MIXING RATIO (G/KG) 3.28 3.95 3.81 6.09 6.53 7.99 10.60 10.05 8.07 4.90 4.11 3.11 6.04 VAPOUR PRESSURE (HPA) 4.51 5.40 5.23 8.35 8.95 10.92 14.39 13.69 11.05 6.77 5.69 4.32 8.27 SATURATION DEF. (HPA) 1.50 2.51 3.06 5.19 9.04 14.82 17.75 17.80 10.42 9.19 4.13 1.21 8.05 RELATIVE HUMIDITY (MEAN %) 77 71 68 66 54 47 48 47 56 48 63 81 61 RELATIVE HUMIDITY (MAX. %) 87 85 82 81 73 65 64 61 73 64 81 87 75 RELATIVE HUMIDITY (MIN. %) 56 54 53 50 37 30 32 32 37 27 43 72 44 RELATIVE HUMIDITY (MEAN% 03UTC) 84 81 78 76 68 62 61 58 70 60 72 82 71 RELATIVE HUMIDITY (MEAN% 09UTC) 69 62 58 59 44 36 40 38 43 31 47 76 50 RELATIVE HUMIDITY (MEAN% 15UTC) 76 67 65 57 43 34 36 39 49 47 61 81 55 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 21.0 120.8 64.2 101.5 27.8 13.0 0.0 3.8 12.1 0.0 8.4 38.9 411.5 DAYS WITH PRECIPITATION >=10 0 2 0 3 1 1 0 0 0 0 0 1 8 DAYS WITH PRECIPITATION >= 5 3 3 8 5 1 1 0 0 1 0 0 5 27 DAYS WITH PRECIPITATION >= 1 5 8 10 14 5 1 0 1 3 0 3 5 55 DAYS WITH PRECIPITATION 6 9 17 14 9 1 0 3 5 1 5 10 80 GREATEST DAILY PRECIPITATION 9.0 79.0 9.0 29.0 16.0 13.0 0.0 3.0 8.0 0.0 4.0 12.0 79.0 DAY 28 7 24 17 28