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 13 ** 27 4 ** 9 8 DAY WITH THUNDER STORM 0 0 0 0 3 2 0 2 3 0 1 0 11 DAYS WITH SNOW OR SLEET 4 5 11 0 0 0 0 0 0 0 1 6 27 DAYS WITH DUST 1 0 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 225 225 225 135 225 45 90 90 45 225 225 180 225 PREVAILING WIND SPEED(KNOTS) 19.2 7.3 5.9 3.4 7.9 2.2 2.3 2.6 2.7 8.4 12.8 6.9 8.7 PREVAILING WIND PERCENT 5.2 7.3 6.9 5.8 8.5 10.8 13.3 12.1 7.1 11.3 12.1 6.9 6.3 CALMS PERCENT OF WIND 92.3 86.2 83.1 83.3 79.4 59.2 37.1 44.0 66.3 71.8 70.8 85.5 71.5 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 234 207 198 184 199 73 15 49 158 215 210 210 209 VECTOR WIND MAGNITUDE(KNOTS) 1.3 0.7 0.4 0.4 0.7 0.2 0.4 0.3 0.3 1.0 2.4 0.8 0.6 WIND STEADINESES (MEAN %) 100.0 70.0 50.0 44.4 53.8 16.7 23.5 17.6 23.1 58.8 82.8 80.0 42.9 WIND SPEED (MEAN KNOTS) 1.3 1.0 0.8 0.9 1.3 1.2 1.7 1.7 1.3 1.7 2.9 1.0 1.4 FASTEST WIND DIRECTION 250 230 130 230 230 230 270 230 230 250 230 200 230 FASTEST WIND SPEED (KNOTS) 30 18 9 13 18 9 9 13 13 30 37 18 37 DAY 29 1 4 10 6 2 2 4 15 14 7 9 DAYS WITH SKY CLEAR (0-2)/8 16 10 7 9 20 27 31 29 24 30 14 7 224 DAYS WITH P.CLOUDY (3-6)/8 9 14 16 11 9 3 0 2 6 1 14 11 96 DAYS WITH CLOUDY (7-8)/8 6 5 8 10 2 0 0 0 0 0 2 13 46 DAYS WITH VISIBILITY =< 2 KM 4 5 6 0 0 0 0 0 0 0 0 3 18 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 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 859.4 856.6 859.8 861.6 861.5 861.6 859.1 861.9 863.6 866.8 866.4 867.3 862.1 MAX. QFE PRESSURE IN HPA 867.3 865.3 868.7 869.5 867.6 868.4 866.0 869.5 873.5 872.1 877.9 875.3 877.9 DAY-HOUR 26- 6 26- 9 14- 3 15- 9 22- 6 11- 6 31- 6 8- 6 29- 6 25- 6 12- 6 2- 9 MIN. QFE PRESSURE IN HPA 843.7 843.9 850.3 850.8 850.6 853.1 853.3 855.2 857.0 858.8 849.8 852.6 843.7 DAY-HOUR 30-12 29- 3 29-15 26-12 28- 6 28-12 5-15 4-15 13-12 17-12 8-12 10- 6 MEAN QNH PRESSURE IN HPA 1006.8 1003.6 1007.2 1009.3 1009.2 1009.3 1006.5 1009.6 1011.5 1015.2 1014.8 1015.8 1009.9 MAX. QNH PRESSURE IN HPA 1015.8 1013.5 1017.4 1018.3 1016.1 1017.0 1014.3 1018.3 1022.8 1021.2 1027.8 1024.9 1027.8 DAY-HOUR 26- 6 26- 9 14- 3 15- 9 22- 6 11- 6 31- 6 8- 6 29- 6 25- 6 12- 6 2- 9 MIN. QNH PRESSURE IN HPA 988.9 989.2 996.4 997.0 996.8 999.6 999.8 1002.0 1004.1 1006.1 995.9 999.1 988.9 DAY-HOUR 30-12 29- 3 29-15 26-12 28- 6 28-12 5-15 4-15 13-12 17-12 8-12 10- 6 MEAN QFF PRESSURE IN HPA 1010.4 1005.1 1008.4 1006.5 1004.0 1001.0 996.0 999.4 1004.8 1011.5 1014.9 1020.8 1006.9 MAX. QFF PRESSURE IN HPA 1022.4 1018.4 1018.7 1022.5 1011.3 1011.2 1005.1 1008.1 1019.9 1020.8 1031.8 1032.8 1032.8 DAY-HOUR 20- 3 12-15 31-21 1- 3 8- 6 14- 3 31- 6 30- 3 29- 6 25- 6 12- 6 13-15 MIN. QFF PRESSURE IN HPA 989.8 989.4 998.4 990.0 992.8 989.7 988.0 989.9 995.0 1001.0 994.6 999.3 988.0 DAY-HOUR 30-12 29- 3 23-12 26-12 28- 6 28-12 5-18 4-12 13-12 17-12 8-12 9- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 859.6 856.6 859.7 861.9 861.8 862.0 859.6 862.3 864.0 867.1 866.5 867.6 862.4 MAX. QFE PRESSURE IN HPA 866.9 863.9 868.3 869.0 865.9 867.1 865.4 868.5 871.8 871.2 876.1 874.5 876.1 DAY 20 14 14 2 22 13 30 8 30 25 13 3 MIN. QFE PRESSURE IN HPA 844.7 844.2 850.7 852.7 852.6 855.0 854.5 857.4 858.5 860.9 851.6 853.9 844.2 DAY 31 29 30 27 28 28 6 15 13 17 9 10 MEAN QNH PRESSURE IN HPA 1007.0 1003.6 1007.2 1009.6 1009.5 1009.7 1007.0 1010.1 1012.0 1015.6 1014.9 1016.1 1010.2 MAX. QNH PRESSURE IN HPA 1015.3 1011.9 1016.9 1017.7 1014.2 1015.5 1013.6 1017.1 1020.9 1020.2 1025.8 1024.0 1025.8 DAY 20 14 14 2 22 13 30 8 30 25 13 3 MIN. QNH PRESSURE IN HPA 990.1 989.5 996.9 999.2 999.1 1001.8 1001.2 1004.5 1005.8 1008.5 997.9 1000.5 989.5 DAY 31 29 30 27 28 28 6 15 13 17 9 10 MEAN QFF PRESSURE IN HPA 1009.9 1004.4 1007.9 1006.6 1004.3 1001.3 996.2 999.5 1004.6 1010.9 1014.3 1020.6 1006.7 MAX. QFF PRESSURE IN HPA 1020.2 1014.5 1016.7 1021.3 1009.6 1010.9 1003.5 1006.2 1016.9 1018.1 1030.6 1029.8 1030.6 DAY 20 14 14 2 6 14 30 28 30 25 13 14 MIN. QFF PRESSURE IN HPA 991.7 989.6 999.9 992.8 992.8 992.4 989.6 992.6 997.2 1002.7 997.7 1001.9 989.6 DAY 31 29 8 27 28 28 6 5 13 17 9 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 859.7 856.7 860.0 862.1 862.1 862.3 860.2 862.8 864.5 867.4 866.8 867.6 862.7 MAX. QFE PRESSURE IN HPA 867.0 864.0 868.7 868.9 866.5 868.1 865.7 869.2 872.5 872.0 876.3 874.5 876.3 DAY 20 14 14 2 14 11 30 8 29 25 12 3 MIN. QFE PRESSURE IN HPA 844.9 843.9 850.8 853.4 852.2 855.0 854.8 857.7 859.0 860.2 851.1 853.7 843.9 DAY 31 29 30 27 28 28 6 15 13 17 9 10 MEAN QNH PRESSURE IN HPA 1007.1 1003.7 1007.5 1009.9 1009.9 1010.1 1007.7 1010.7 1012.6 1015.9 1015.2 1016.1 1010.5 MAX. QNH PRESSURE IN HPA 1015.4 1012.0 1017.4 1017.6 1014.9 1016.7 1014.0 1017.9 1021.7 1021.1 1026.0 1024.0 1026.0 DAY 20 14 14 2 14 11 30 8 29 25 12 3 MIN. QNH PRESSURE IN HPA 990.3 989.2 997.0 1000.0 998.6 1001.8 1001.6 1004.9 1006.3 1007.7 997.3 1000.3 989.2 DAY 31 29 30 27 28 28 6 15 13 17 9 10 MEAN QFF PRESSURE IN HPA 1011.3 1005.8 1009.1 1007.6 1005.3 1002.3 997.6 1001.1 1006.6 1013.2 1016.1 1021.6 1008.1 MAX. QFF PRESSURE IN HPA 1022.4 1016.4 1018.3 1022.5 1010.6 1011.2 1004.5 1008.1 1019.4 1020.4 1030.6 1031.5 1031.5 DAY 20 12 14 1 22 14 31 30 29 23 13 13 MIN. QFF PRESSURE IN HPA 992.9 989.4 1000.2 995.0 993.5 993.2 990.8 994.2 999.8 1004.5 997.7 1002.8 989.4 DAY 31 29 8 27 28 28 6 4 13 17 9 10 ======================================================================================================================= 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 PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 860.2 857.2 860.5 862.5 862.4 862.5 860.4 863.2 864.8 868.0 867.4 868.0 863.1 MAX. QFE PRESSURE IN HPA 867.3 864.9 868.7 869.1 867.6 868.4 866.0 869.5 873.5 872.1 877.9 875.0 877.9 DAY 26 14 14 2 22 11 31 8 29 25 12 2 MIN. QFE PRESSURE IN HPA 844.9 844.7 851.5 853.3 850.6 855.4 855.3 858.1 859.9 861.1 852.2 852.6 844.7 DAY 30 29 30 26 28 28 6 4 13 17 9 10 MEAN QNH PRESSURE IN HPA 1007.7 1004.3 1008.0 1010.3 1010.2 1010.4 1007.9 1011.1 1012.9 1016.5 1015.9 1016.6 1011.0 MAX. QNH PRESSURE IN HPA 1015.8 1013.0 1017.4 1017.8 1016.1 1017.0 1014.3 1018.3 1022.8 1021.2 1027.8 1024.5 1027.8 DAY 26 14 14 2 22 11 31 8 29 25 12 2 MIN. QNH PRESSURE IN HPA 990.3 990.1 997.8 999.8 996.8 1002.2 1002.1 1005.3 1007.4 1008.7 998.6 999.1 990.1 DAY 30 29 30 26 28 28 6 4 13 17 9 10 MEAN QFF PRESSURE IN HPA 1012.0 1006.3 1009.5 1007.8 1005.1 1002.2 997.6 1001.3 1006.5 1013.5 1016.8 1022.1 1008.4 MAX. QFF PRESSURE IN HPA 1022.0 1018.1 1018.6 1022.3 1011.3 1010.8 1005.1 1008.1 1019.9 1020.8 1031.8 1031.5 1031.8 DAY 20 12 6 1 8 13 31 8 29 25 12 13 MIN. QFF PRESSURE IN HPA 991.0 990.7 1000.0 993.0 992.8 993.1 990.1 993.5 1000.2 1004.7 998.8 1000.7 990.1 DAY 30 29 8 26 28 28 6 4 21 17 9 9 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.9 857.3 860.3 862.1 861.7 862.0 859.7 862.5 864.1 867.1 866.6 867.6 862.6 MAX. QFE PRESSURE IN HPA 867.3 865.3 867.5 869.5 867.1 867.3 865.7 869.0 873.1 871.6 876.4 875.3 876.4 DAY 26 26 13 15 22 13 31 8 29 25 13 2 MIN. QFE PRESSURE IN HPA 844.6 845.9 851.6 851.4 851.4 855.2 855.3 856.4 857.6 859.7 851.0 852.6 844.6 DAY 30 29 30 26 28 28 6 4 13 17 8 10 MEAN QNH PRESSURE IN HPA 1007.4 1004.4 1007.8 1009.8 1009.4 1009.8 1007.2 1010.3 1012.1 1015.5 1015.0 1016.2 1010.4 MAX. QNH PRESSURE IN HPA 1015.8 1013.5 1016.0 1018.3 1015.5 1015.8 1014.0 1017.7 1022.4 1020.7 1026.1 1024.9 1026.1 DAY 26 26 13 15 22 13 31 8 29 25 13 2 MIN. QNH PRESSURE IN HPA 990.0 991.4 997.9 997.7 997.7 1002.0 1002.1 1003.4 1004.7 1007.1 997.2 999.1 990.0 DAY 30 29 30 26 28 28 6 4 13 17 8 10 MEAN QFF PRESSURE IN HPA 1010.5 1005.5 1008.6 1006.7 1003.8 1001.3 996.4 999.6 1004.8 1011.0 1014.2 1020.5 1006.9 MAX. QFF PRESSURE IN HPA 1020.4 1017.4 1016.0 1022.2 1010.5 1010.8 1005.0 1006.8 1018.5 1018.3 1029.0 1029.8 1029.8 DAY 26 12 13 1 8 13 31 8 29 23 13 17 MIN. QFF PRESSURE IN HPA 990.4 992.1 999.4 990.5 993.1 992.3 989.4 990.5 995.5 1001.5 995.5 999.3 989.4 DAY 30 29 23 26 28 28 6 4 13 17 8 9 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 858.7 856.0 859.1 861.1 860.9 861.1 858.5 861.2 862.6 865.9 865.5 866.7 861.4 MAX. QFE PRESSURE IN HPA 866.5 864.3 867.6 868.6 866.3 866.7 864.2 868.5 871.4 870.6 876.1 874.0 876.1 DAY 25 26 13 1 22 13 29 8 29 25 12 2 MIN. QFE PRESSURE IN HPA 843.7 844.7 850.6 850.8 852.6 853.1 854.2 855.5 857.0 858.8 849.8 852.7 843.7 DAY 30 7 29 26 3 28 6 4 13 17 8 9 MEAN QNH PRESSURE IN HPA 1006.0 1002.9 1006.5 1008.7 1008.5 1008.7 1005.7 1008.8 1010.4 1014.2 1013.8 1015.1 1009.1 MAX. QNH PRESSURE IN HPA 1014.9 1012.4 1016.1 1017.2 1014.6 1015.1 1012.2 1017.1 1020.4 1019.5 1025.8 1023.4 1025.8 DAY 25 26 13 1 22 13 29 8 29 25 12 2 MIN. QNH PRESSURE IN HPA 988.9 990.1 996.8 997.0 999.1 999.6 1000.9 1002.4 1004.1 1006.1 995.9 999.2 988.9 DAY 30 7 29 26 3 28 6 4 13 17 8 9 MEAN QFF PRESSURE IN HPA 1008.9 1003.6 1007.2 1005.5 1003.1 1000.2 994.8 998.0 1002.9 1009.4 1013.1 1019.6 1005.5 MAX. QFF PRESSURE IN HPA 1017.6 1016.3 1015.8 1021.4 1009.3 1010.3 1002.2 1006.2 1016.3 1017.0 1029.7 1030.5 1030.5 DAY 25 12 13 1 6 13 29 8 29 25 12 13 MIN. QFF PRESSURE IN HPA 989.8 990.8 998.4 990.0 994.2 989.7 989.0 989.9 995.0 1001.0 994.6 999.4 989.0 DAY 30 28 23 26 3 28 6 4 13 17 8 9 ======================================================================================================================= 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 PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 858.9 856.4 859.3 860.9 860.7 860.6 857.7 860.5 862.4 866.1 866.0 867.0 861.4 MAX. QFE PRESSURE IN HPA 866.1 864.7 867.8 868.7 865.6 866.3 863.8 866.3 871.2 870.5 876.1 874.4 876.1 DAY 25 12 13 1 22 12 29 8 29 25 12 2 MIN. QFE PRESSURE IN HPA 844.4 844.5 850.3 850.9 853.6 853.4 853.3 855.2 857.1 858.8 850.1 854.8 844.4 DAY 30 28 29 26 3 28 5 4 11 17 8 9 MEAN QNH PRESSURE IN HPA 1006.2 1003.4 1006.7 1008.5 1008.3 1008.2 1004.8 1008.1 1010.2 1014.4 1014.3 1015.5 1009.0 MAX. QNH PRESSURE IN HPA 1014.4 1012.8 1016.3 1017.4 1013.8 1014.6 1011.8 1014.6 1020.2 1019.4 1025.8 1023.8 1025.8 DAY 25 12 13 1 22 12 29 8 29 25 12 2 MIN. QNH PRESSURE IN HPA 989.7 989.8 996.4 997.1 1000.2 1000.0 999.8 1002.0 1004.2 1006.1 996.2 1001.6 989.7 DAY 30 28 29 26 3 28 5 4 11 17 8 9 MEAN QFF PRESSURE IN HPA 1010.5 1005.3 1008.3 1005.9 1003.4 1000.2 994.6 998.2 1004.2 1011.6 1015.2 1021.0 1006.5 MAX. QFF PRESSURE IN HPA 1020.3 1018.4 1017.3 1022.4 1009.0 1010.2 1002.1 1005.4 1017.7 1018.5 1030.3 1032.8 1032.8 DAY 19 12 13 1 7 13 29 31 29 25 12 13 MIN. QFF PRESSURE IN HPA 991.8 990.3 999.3 991.5 995.4 991.5 988.4 991.0 996.9 1002.7 995.5 1002.5 988.4 DAY 30 28 29 26 27 28 5 3 11 17 8 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 859.0 856.5 859.5 861.1 861.1 861.0 858.2 861.1 862.9 866.4 866.2 867.1 861.7 MAX. QFE PRESSURE IN HPA 866.1 863.7 867.8 868.7 865.7 866.4 864.3 866.6 871.4 870.6 876.3 874.5 876.3 DAY 25 26 13 1 22 12 29 7 29 25 12 2 MIN. QFE PRESSURE IN HPA 844.5 844.5 850.5 851.0 853.6 854.6 853.6 856.0 857.5 860.3 850.4 854.4 844.5 DAY 30 28 29 26 27 28 5 4 11 17 8 9 MEAN QNH PRESSURE IN HPA 1006.3 1003.5 1006.9 1008.8 1008.7 1008.6 1005.5 1008.7 1010.8 1014.8 1014.6 1015.6 1009.4 MAX. QNH PRESSURE IN HPA 1014.4 1011.7 1016.3 1017.4 1014.0 1014.7 1012.4 1015.0 1020.4 1019.5 1026.0 1024.0 1026.0 DAY 25 26 13 1 22 12 29 7 29 25 12 2 MIN. QNH PRESSURE IN HPA 989.8 989.8 996.7 997.2 1000.2 1001.3 1000.2 1002.9 1004.6 1007.8 996.6 1001.1 989.8 DAY 30 28 29 26 27 28 5 4 11 17 8 9 MEAN QFF PRESSURE IN HPA 1010.7 1005.4 1008.4 1006.0 1003.5 1000.3 995.1 998.8 1004.5 1011.8 1015.4 1021.2 1006.8 MAX. QFF PRESSURE IN HPA 1020.6 1016.6 1017.3 1022.3 1008.8 1010.3 1003.1 1006.0 1017.4 1018.7 1030.9 1031.3 1031.3 DAY 19 13 31 1 7 13 29 27 29 25 12 13 MIN. QFF PRESSURE IN HPA 991.6 990.5 999.5 990.8 995.2 992.2 988.0 991.4 996.6 1004.5 996.0 1003.0 988.0 DAY 30 28 29 26 27 28 5 3 11 17 8 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 859.2 856.5 859.8 861.4 861.4 861.5 858.9 861.7 863.5 866.8 866.4 867.1 862.0 MAX. QFE PRESSURE IN HPA 866.3 863.7 868.2 868.9 865.7 866.7 864.8 867.5 871.6 870.9 876.3 874.5 876.3 DAY 19 13 13 1 22 12 29 7 29 25 12 2 MIN. QFE PRESSURE IN HPA 844.5 844.3 850.6 851.8 853.1 855.1 854.1 856.4 858.0 861.2 851.2 854.2 844.3 DAY 30 28 29 26 27 27 5 4 12 17 8 9 MEAN QNH PRESSURE IN HPA 1006.6 1003.5 1007.2 1009.1 1009.1 1009.2 1006.2 1009.4 1011.5 1015.2 1014.8 1015.5 1009.8 MAX. QNH PRESSURE IN HPA 1014.6 1011.7 1016.8 1017.6 1014.0 1015.1 1012.9 1016.0 1020.7 1019.9 1026.0 1024.0 1026.0 DAY 19 13 13 1 22 12 29 7 29 25 12 2 MIN. QNH PRESSURE IN HPA 989.8 989.6 996.8 998.1 999.6 1001.9 1000.8 1003.4 1005.2 1008.8 997.5 1000.9 989.6 DAY 30 28 29 26 27 27 5 4 12 17 8 9 MEAN QFF PRESSURE IN HPA 1009.8 1004.6 1008.1 1005.8 1003.5 1000.7 995.6 998.8 1004.4 1010.6 1014.1 1019.9 1006.3 MAX. QFF PRESSURE IN HPA 1019.5 1014.7 1018.7 1021.8 1009.2 1010.3 1003.4 1005.6 1017.0 1017.0 1029.5 1029.3 1029.5 DAY 19 13 31 1 7 13 29 27 29 23 12 13 MIN. QFF PRESSURE IN HPA 991.1 990.0 999.4 991.6 993.7 992.5 988.1 991.3 996.3 1002.8 996.4 1002.3 988.1 DAY 30 28 29 26 27 27 5 3 12 16 8 9 ======================================================================================================================= 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 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.7 -4.7 4.7 10.7 15.0 19.4 23.4 23.7 21.3 12.7 5.6 1.0 10.6 MINIMUN AIR TEMPERATURE (C) -8.6 -7.7 1.5 6.5 9.5 13.2 16.4 16.9 14.6 8.1 2.5 -2.2 5.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 2 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 30 23 1 0 0 0 0 0 0 0 2 6 62 DAYS WITH FREEZING MIN.<= 0 31 27 10 2 0 0 0 0 0 0 11 28 109 TEMPERATURE RECORDS LOWEST(C) -15.0 -14.0 -4.0 -1.0 6.0 6.0 12.0 14.0 11.0 2.0 -4.0 -9.0 -15.0 DAY 8 8 29 6 1 7 4 15 30 14 23 31 MAXIMUM AIR TEMPERATURE (C) -1.0 -0.7 9.7 16.4 22.3 26.7 31.7 32.5 30.5 20.7 11.5 7.4 17.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 8 23 27 22 1 0 0 82 DAYS WITH MAXIMUM TEMP. <= 0 23 20 1 0 0 0 0 0 0 0 0 1 45 TEMPERATURE RECORDS HIGHEST(C) 5.0 9.0 18.0 26.0 30.0 32.0 38.0 38.0 34.0 30.0 21.0 15.0 38.0 DAY 15 28 21 15 31 22 30 5 6 6 1 19 DIF. BETWEEN (MAX.-MIN.) (C) 7.6 7.0 8.2 9.9 12.8 13.5 15.3 15.6 15.9 12.6 9.0 9.6 11.4 MEAN DAILY TEMP. (MDT) (C) -4.8 -4.2 5.6 11.4 15.9 19.9 24.1 24.7 22.5 14.4 7.0 2.6 11.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.5 21.0 99.5 116.0 51.0 0.0 0.0 0.0 288.0 HEATING DEG. DAYS(BASE 18 0C) 661.5 621.5 385.0 196.5 72.0 22.0 0.0 0.0 0.0 123.0 329.0 462.0 2872.5 DEWPOINT (MEAN C) -8.3 -6.9 0.6 4.2 7.9 10.8 12.7 11.9 9.2 5.8 2.1 -2.5 4.0 MIXING RATIO (G/KG) 2.45 2.77 4.74 6.15 7.87 9.66 10.96 10.34 8.59 6.85 5.36 3.76 6.62 VAPOUR PRESSURE (HPA) 3.38 3.83 6.52 8.45 10.77 13.19 14.89 14.10 11.77 9.45 7.39 5.21 9.08 SATURATION DEF. (HPA) 0.72 0.66 2.38 5.29 7.02 10.64 15.57 17.11 14.92 6.15 2.23 1.67 7.03 RELATIVE HUMIDITY (MEAN %) 82 85 77 68 65 61 54 50 48 65 79 79 68 RELATIVE HUMIDITY (MAX. %) 87 89 90 83 85 80 73 69 63 81 90 88 82 RELATIVE HUMIDITY (MIN. %) 78 80 61 51 45 42 35 32 30 44 60 62 52 RELATIVE HUMIDITY (MEAN% 03UTC) 82 85 85 82 82 78 71 67 60 78 87 85 79 RELATIVE HUMIDITY (MEAN% 09UTC) 81 85 69 58 53 48 42 38 35 49 67 66 58 RELATIVE HUMIDITY (MEAN% 15UTC) 83 86 72 59 55 47 40 38 40 63 80 80 62 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 31.2 39.2 107.1 73.0 78.2 71.6 1.8 7.3 0.0 15.7 71.7 5.4 502.2 DAYS WITH PRECIPITATION >=10 1 1 4 3 3 1 0 0 0 0 4 0 17 DAYS WITH PRECIPITATION >= 5 3 4 10 6 5 5 0 1 0 1 4 0 39 DAYS WITH PRECIPITATION >= 1 5 9 14 9 10 9 1 1 0 3 8 3 72 DAYS WITH PRECIPITATION 12 12 16 12 19 12 4 4 0 10 11 6 118 GREATEST DAILY PRECIPITATION 13.0 11.0 18.0 18.0 20.0 37.0 1.0 7.0 0.0 7.0 18.0 2.0 37.0 DAY 30 26 25 25 19 5 4 14 ** 17 16 5 DAY WITH THUNDER STORM 0 0 0 1 8 8 4 0 1 1 0 0 23 DAYS WITH SNOW OR SLEET 13 8 7 1 0 0 0 0 0 0 1 2 32 DAYS WITH DUST 0 0 0 0 0 0 0 1 1 0 0 0 2 WIND DIRECTION (PREVAILING) 225 360 225 90 225 90 360 360 90 90 90 90 90 PREVAILING WIND SPEED(KNOTS) 2.8 4.3 6.0 3.1 6.5 2.6 2.1 2.9 2.8 2.6 2.5 2.1 3.0 PREVAILING WIND PERCENT 1.6 1.8 6.5 11.7 10.5 8.8 8.1 8.1 15.4 8.9 5.0 5.6 6.5 CALMS PERCENT OF WIND 96.4 97.8 79.4 73.3 63.3 63.8 67.3 71.0 66.7 77.0 82.1 80.6 76.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 216 353 191 118 179 88 351 41 82 108 86 181 115 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.1 0.2 0.4 0.6 0.2 0.3 0.4 0.6 0.2 R< 0.1 0.3 0.1 WIND STEADINESES (MEAN %) 100.0 100.0 22.2 44.4 37.5 15.4 27.3 40.0 54.5 25.0 6.8 50.0 12.5 WIND SPEED (MEAN KNOTS) 0.1 0.1 0.9 0.9 1.6 1.3 1.1 1.0 1.1 0.8 0.5 0.6 0.8 FASTEST WIND DIRECTION 230 360 90 200 230 230 230 90 130 310 230 230 230 FASTEST WIND SPEED (KNOTS) 5 5 13 13 18 13 13 9 9 9 9 9 18 DAY 7 5 7 9 5 4 2 18 1 2 15 7 DAYS WITH SKY CLEAR (0-2)/8 9 2 6 3 5 20 28 27 28 15 9 13 165 DAYS WITH P.CLOUDY (3-6)/8 7 5 11 14 20 9 3 3 2 10 12 12 108 DAYS WITH CLOUDY (7-8)/8 15 21 14 13 6 1 0 1 0 6 9 6 92 DAYS WITH VISIBILITY =< 2 KM 8 12 6 1 0 0 0 0 1 0 1 0 29 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 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 863.8 866.6 862.0 863.6 862.2 863.1 860.7 862.6 864.7 867.8 866.3 866.1 864.1 MAX. QFE PRESSURE IN HPA 872.8 874.6 869.8 870.5 870.6 868.3 869.6 869.8 869.2 874.7 874.4 873.6 874.7 DAY-HOUR 23- 6 7-18 26-21 16- 9 11- 6 20- 6 5- 6 27-18 10- 6 12- 6 23- 9 22- 9 MIN. QFE PRESSURE IN HPA 845.2 850.1 851.6 858.2 856.6 857.8 853.3 851.2 860.2 859.8 859.5 855.0 845.2 DAY-HOUR 19- 3 1- 9 7- 0 28-12 24-12 27-21 2-15 7- 9 28-12 8-15 30-12 7- 3 MEAN QNH PRESSURE IN HPA 1011.8 1015.0 1009.7 1011.5 1010.0 1011.0 1008.2 1010.4 1012.8 1016.3 1014.7 1014.4 1012.2 MAX. QNH PRESSURE IN HPA 1022.0 1024.1 1018.6 1019.4 1019.5 1016.9 1018.4 1018.6 1017.9 1024.2 1023.8 1022.9 1024.2 DAY-HOUR 23- 6 7-18 26-21 16- 9 11- 6 20- 6 5- 6 27-18 10- 6 12- 6 23- 9 22- 9 MIN. QNH PRESSURE IN HPA 990.6 996.2 997.9 1005.4 1003.6 1005.0 999.8 997.5 1007.7 1007.2 1006.9 1001.8 990.6 DAY-HOUR 19- 3 1- 9 7- 0 28-12 24-12 27-21 2-15 7- 9 28-12 8-15 30-12 7- 3 MEAN QFF PRESSURE IN HPA 1018.9 1021.6 1010.3 1008.8 1004.7 1003.3 998.4 1000.4 1004.3 1012.5 1014.8 1017.3 1009.6 MAX. QFF PRESSURE IN HPA 1030.7 1035.3 1023.0 1017.0 1014.7 1010.6 1012.1 1009.6 1009.8 1024.2 1028.8 1028.0 1035.3 DAY-HOUR 23- 6 7-18 29- 6 5- 3 11- 6 8- 6 5- 6 27-18 22- 6 12- 6 23-18 22-18 MIN. QFF PRESSURE IN HPA 994.1 1000.8 998.4 1000.4 996.2 995.7 989.9 984.6 999.4 1000.1 1007.7 1002.1 984.6 DAY-HOUR 19- 3 1- 9 7- 0 19-21 24-12 27-21 2-12 7- 9 28-12 8-12 30-12 6-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 863.9 866.6 862.1 863.6 862.3 863.4 861.0 862.8 865.0 867.9 866.5 866.0 864.3 MAX. QFE PRESSURE IN HPA 871.0 874.6 868.2 869.8 868.8 867.0 869.0 866.9 868.2 873.7 873.7 872.7 874.6 DAY 24 8 30 16 11 20 5 31 10 30 24 23 MIN. QFE PRESSURE IN HPA 846.9 854.2 851.6 858.7 858.2 859.2 855.1 855.1 862.6 860.5 861.0 855.2 846.9 DAY 19 27 7 28 8 28 15 8 28 9 30 7 MEAN QNH PRESSURE IN HPA 1012.0 1015.0 1009.9 1011.5 1010.1 1011.3 1008.6 1010.7 1013.2 1016.5 1014.8 1014.3 1012.3 MAX. QNH PRESSURE IN HPA 1020.0 1024.1 1016.8 1018.6 1017.5 1015.4 1017.7 1015.3 1016.8 1023.0 1023.0 1021.9 1024.1 DAY 24 8 30 16 11 20 5 31 10 30 24 23 MIN. QNH PRESSURE IN HPA 992.6 1000.9 997.9 1006.0 1005.4 1006.6 1001.9 1001.9 1010.4 1008.0 1008.6 1002.0 992.6 DAY 19 27 7 28 8 28 15 8 28 9 30 7 MEAN QFF PRESSURE IN HPA 1018.5 1021.3 1010.0 1008.5 1004.6 1003.4 998.4 1000.1 1004.0 1012.0 1014.3 1016.6 1009.3 MAX. QFF PRESSURE IN HPA 1026.6 1032.7 1019.6 1015.7 1012.2 1010.2 1010.9 1005.1 1006.9 1022.3 1027.0 1026.2 1032.7 DAY 23 8 30 5 11 6 5 17 22 13 24 23 MIN. QFF PRESSURE IN HPA 995.9 1003.3 998.4 1002.0 998.2 997.0 991.1 989.3 1001.0 1000.5 1009.2 1002.5 989.3 DAY 19 27 7 19 26 28 15 8 4 9 7 7 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 863.9 866.7 862.3 863.9 862.6 863.7 861.3 863.1 865.3 868.3 866.6 866.1 864.5 MAX. QFE PRESSURE IN HPA 871.1 874.6 868.2 870.0 869.7 867.9 869.1 867.4 868.5 874.1 873.4 872.6 874.6 DAY 23 8 2 16 11 20 5 31 10 30 24 22 MIN. QFE PRESSURE IN HPA 845.2 853.9 851.6 858.7 858.9 860.3 855.4 855.0 862.3 860.6 860.9 855.0 845.2 DAY 19 27 7 28 8 4 15 8 28 9 30 7 MEAN QNH PRESSURE IN HPA 1011.9 1015.1 1010.1 1011.9 1010.4 1011.7 1009.0 1011.0 1013.5 1016.9 1014.9 1014.4 1012.6 MAX. QNH PRESSURE IN HPA 1020.1 1024.1 1016.8 1018.8 1018.5 1016.5 1017.8 1015.9 1017.1 1023.5 1022.7 1021.8 1024.1 DAY 23 8 2 16 11 20 5 31 10 30 24 22 MIN. QNH PRESSURE IN HPA 990.6 1000.5 997.9 1006.0 1006.2 1007.8 1002.2 1001.8 1010.1 1008.2 1008.5 1001.8 990.6 DAY 19 27 7 28 8 4 15 8 28 9 30 7 MEAN QFF PRESSURE IN HPA 1019.5 1022.1 1011.0 1009.7 1005.9 1004.5 999.6 1001.5 1005.6 1013.8 1015.9 1018.1 1010.6 MAX. QFF PRESSURE IN HPA 1029.1 1033.4 1020.9 1017.0 1014.5 1010.6 1011.6 1008.0 1009.0 1023.0 1027.9 1026.8 1033.4 DAY 23 8 29 5 11 6 5 15 30 13 24 23 MIN. QFF PRESSURE IN HPA 994.1 1003.2 998.8 1003.8 999.8 999.0 992.1 990.6 1002.6 1001.5 1009.3 1003.6 990.6 DAY 19 27 7 28 26 30 15 8 3 9 7 7 ======================================================================================================================= 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 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 864.3 867.0 862.7 864.5 863.0 864.0 861.6 863.5 865.9 868.9 867.2 866.7 864.9 MAX. QFE PRESSURE IN HPA 872.8 874.3 869.4 870.3 870.6 868.3 869.6 867.6 869.2 874.7 873.5 873.0 874.7 DAY 23 8 29 16 11 20 5 31 10 12 24 15 MIN. QFE PRESSURE IN HPA 846.0 855.4 852.5 859.0 858.7 860.8 855.8 856.3 862.7 861.0 860.6 856.2 846.0 DAY 19 27 7 28 25 4 12 8 28 9 30 7 MEAN QNH PRESSURE IN HPA 1012.3 1015.4 1010.5 1012.6 1010.9 1012.1 1009.3 1011.4 1014.1 1017.6 1015.7 1015.1 1013.1 MAX. QNH PRESSURE IN HPA 1022.0 1023.7 1018.2 1019.2 1019.5 1016.9 1018.4 1016.1 1017.9 1024.2 1022.8 1022.3 1024.2 DAY 23 8 29 16 11 20 5 31 10 12 24 15 MIN. QNH PRESSURE IN HPA 991.5 1002.2 998.9 1006.3 1006.0 1008.4 1002.7 1003.3 1010.5 1008.6 1008.2 1003.2 991.5 DAY 19 27 7 28 25 4 12 8 28 9 30 7 MEAN QFF PRESSURE IN HPA 1020.1 1022.5 1011.5 1010.1 1005.7 1004.7 999.8 1001.9 1006.1 1014.3 1016.4 1018.8 1011.0 MAX. QFF PRESSURE IN HPA 1030.7 1034.2 1023.0 1016.1 1014.7 1010.6 1012.1 1007.1 1009.8 1024.2 1028.3 1027.3 1034.2 DAY 23 8 29 5 11 8 5 15 22 12 24 22 MIN. QFF PRESSURE IN HPA 995.5 1004.7 999.6 1003.5 999.0 999.3 992.8 992.3 1003.4 1002.3 1010.4 1005.1 992.3 DAY 19 27 7 28 25 30 15 8 4 9 30 7 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 864.2 866.6 862.4 864.3 862.8 863.7 861.1 863.0 865.3 868.3 866.9 866.6 864.6 MAX. QFE PRESSURE IN HPA 872.5 874.0 869.8 870.5 870.3 867.8 868.5 866.5 868.1 874.3 874.4 873.6 874.4 DAY 23 19 29 16 11 20 5 31 9 12 23 22 MIN. QFE PRESSURE IN HPA 847.6 850.1 852.4 859.4 858.3 860.7 855.3 851.2 861.8 861.0 861.2 856.5 847.6 DAY 19 1 7 28 25 3 15 7 28 9 30 7 MEAN QNH PRESSURE IN HPA 1012.2 1015.0 1010.2 1012.4 1010.6 1011.7 1008.8 1010.8 1013.5 1016.9 1015.3 1014.9 1012.7 MAX. QNH PRESSURE IN HPA 1021.7 1023.4 1018.6 1019.4 1019.2 1016.3 1017.1 1014.9 1016.7 1023.7 1023.8 1022.9 1023.8 DAY 23 19 29 16 11 20 5 31 9 12 23 22 MIN. QNH PRESSURE IN HPA 993.4 996.2 998.8 1006.8 1005.5 1008.3 1002.1 997.5 1009.5 1008.6 1008.8 1003.5 993.4 DAY 19 1 7 28 25 3 15 7 28 9 30 7 MEAN QFF PRESSURE IN HPA 1018.6 1021.1 1010.5 1009.2 1004.9 1003.6 998.5 1000.4 1004.3 1012.2 1014.8 1017.0 1009.6 MAX. QFF PRESSURE IN HPA 1029.7 1032.5 1022.7 1014.5 1013.1 1009.7 1009.9 1005.2 1008.7 1022.9 1028.1 1027.2 1032.5 DAY 23 8 29 4 11 8 5 22 23 12 23 22 MIN. QFF PRESSURE IN HPA 997.5 1000.8 999.8 1001.5 998.4 998.4 991.2 984.6 1001.4 1002.4 1008.8 1003.6 984.6 DAY 19 1 7 19 25 29 2 7 28 9 17 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 863.1 866.2 861.3 863.1 861.8 862.7 860.1 862.1 864.1 867.1 865.8 865.4 863.6 MAX. QFE PRESSURE IN HPA 872.1 874.1 869.5 868.5 868.9 866.5 867.6 865.5 867.4 873.2 873.5 872.7 874.1 DAY 23 7 29 16 11 20 5 31 9 12 23 22 MIN. QFE PRESSURE IN HPA 847.2 855.9 852.3 858.2 856.6 858.7 853.7 855.6 860.2 860.4 859.5 855.8 847.2 DAY 19 27 7 28 24 27 2 7 28 8 30 6 MEAN QNH PRESSURE IN HPA 1011.0 1014.5 1008.9 1011.0 1009.6 1010.5 1007.5 1009.8 1012.1 1015.5 1014.0 1013.7 1011.5 MAX. QNH PRESSURE IN HPA 1021.2 1023.5 1018.3 1017.1 1017.6 1014.9 1016.1 1013.7 1015.9 1022.5 1022.8 1021.9 1023.5 DAY 23 7 29 16 11 20 5 31 9 12 23 22 MIN. QNH PRESSURE IN HPA 992.9 1002.8 998.7 1005.4 1003.6 1006.0 1000.3 1002.5 1007.7 1007.9 1006.9 1002.7 992.9 DAY 19 27 7 28 24 27 2 7 28 8 30 6 MEAN QFF PRESSURE IN HPA 1017.4 1020.6 1009.0 1007.8 1003.8 1002.4 997.1 999.2 1002.8 1011.0 1013.5 1015.8 1008.4 MAX. QFF PRESSURE IN HPA 1028.0 1032.0 1021.6 1014.1 1012.2 1008.4 1008.4 1004.0 1005.8 1021.7 1026.8 1026.1 1032.0 DAY 23 7 29 4 11 8 5 16 9 12 23 22 MIN. QFF PRESSURE IN HPA 996.5 1004.0 999.0 1000.9 996.2 996.2 989.9 989.3 999.4 1000.1 1007.7 1003.5 989.3 DAY 19 27 7 28 24 27 2 7 28 8 30 6 ======================================================================================================================= 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 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 863.6 866.5 861.3 862.9 861.6 862.2 859.7 861.5 863.7 867.1 865.8 865.8 863.5 MAX. QFE PRESSURE IN HPA 872.1 874.5 869.5 868.3 868.1 865.9 866.9 864.7 866.7 872.9 874.3 873.1 874.5 DAY 23 7 29 16 29 20 4 31 9 12 23 22 MIN. QFE PRESSURE IN HPA 849.6 856.3 853.2 858.4 857.0 858.2 853.3 854.4 860.5 859.8 860.2 855.5 849.6 DAY 19 26 14 8 24 27 2 7 28 8 30 6 MEAN QNH PRESSURE IN HPA 1011.6 1014.9 1009.0 1010.8 1009.3 1010.0 1007.1 1009.2 1011.7 1015.6 1014.1 1014.1 1011.4 MAX. QNH PRESSURE IN HPA 1021.2 1024.0 1018.3 1016.9 1016.7 1014.2 1015.3 1012.8 1015.1 1022.1 1023.7 1022.4 1024.0 DAY 23 7 29 16 29 20 4 31 9 12 23 22 MIN. QNH PRESSURE IN HPA 995.6 1003.3 999.7 1005.7 1004.1 1005.4 999.8 1001.1 1008.0 1007.2 1007.7 1002.4 995.6 DAY 19 26 14 8 24 27 2 7 28 8 30 6 MEAN QFF PRESSURE IN HPA 1019.1 1021.8 1009.8 1008.4 1004.6 1002.5 997.5 999.5 1003.6 1012.4 1015.0 1017.7 1009.3 MAX. QFF PRESSURE IN HPA 1028.3 1034.3 1022.9 1015.4 1011.3 1009.1 1008.9 1004.3 1008.1 1022.3 1028.7 1027.6 1034.3 DAY 23 7 29 4 11 5 4 15 30 12 23 22 MIN. QFF PRESSURE IN HPA 1000.5 1005.9 1000.9 1000.5 998.0 996.6 990.0 989.8 999.9 1000.7 1009.0 1004.1 989.8 DAY 19 26 14 19 25 27 14 7 3 8 4 6 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 863.8 866.7 861.5 863.2 861.8 862.5 860.2 862.3 864.1 867.4 866.0 865.9 863.8 MAX. QFE PRESSURE IN HPA 871.7 874.6 869.1 868.6 868.1 866.0 867.7 869.8 867.1 873.1 874.1 872.9 874.6 DAY 23 7 29 15 29 20 4 27 9 30 23 22 MIN. QFE PRESSURE IN HPA 850.9 855.5 853.9 858.8 857.3 858.0 853.8 854.9 861.2 860.1 860.9 855.4 850.9 DAY 18 26 14 8 25 27 2 7 28 8 30 6 MEAN QNH PRESSURE IN HPA 1011.8 1015.1 1009.2 1011.1 1009.5 1010.3 1007.7 1010.1 1012.2 1015.8 1014.3 1014.2 1011.8 MAX. QNH PRESSURE IN HPA 1020.8 1024.1 1017.8 1017.2 1016.7 1014.3 1016.2 1018.6 1015.5 1022.4 1023.5 1022.1 1024.1 DAY 23 7 29 15 29 20 4 27 9 30 23 22 MIN. QNH PRESSURE IN HPA 997.1 1002.4 1000.5 1006.1 1004.4 1005.2 1000.4 1001.7 1008.8 1007.6 1008.5 1002.2 997.1 DAY 18 26 14 8 25 27 2 7 28 8 30 6 MEAN QFF PRESSURE IN HPA 1019.5 1022.1 1010.1 1008.5 1004.4 1002.9 998.1 1000.7 1004.2 1012.6 1015.0 1018.0 1009.7 MAX. QFF PRESSURE IN HPA 1028.4 1035.3 1022.2 1015.8 1011.0 1010.0 1010.9 1009.6 1009.0 1022.4 1028.8 1028.0 1035.3 DAY 24 7 29 4 11 5 4 27 30 12 23 22 MIN. QFF PRESSURE IN HPA 1002.3 1005.0 1001.4 1000.8 997.4 997.3 990.4 990.2 1001.6 1001.8 1009.1 1003.8 990.2 DAY 18 26 6 19 25 30 2 7 3 8 4 6 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 863.7 866.8 862.4 863.3 862.0 862.8 860.6 862.4 864.6 867.6 866.1 866.1 864.0 MAX. QFE PRESSURE IN HPA 871.4 874.6 869.8 869.2 868.0 866.2 868.4 866.2 867.7 873.4 873.9 872.8 874.6 DAY 23 7 26 15 29 19 4 30 9 29 23 22 MIN. QFE PRESSURE IN HPA 849.4 854.9 852.9 858.7 857.2 857.8 854.4 855.0 861.9 860.4 861.1 855.3 849.4 DAY 18 26 6 27 13 27 14 7 28 8 29 6 MEAN QNH PRESSURE IN HPA 1011.7 1015.2 1010.1 1011.3 1009.8 1010.6 1008.2 1010.2 1012.7 1016.1 1014.4 1014.4 1012.1 MAX. QNH PRESSURE IN HPA 1020.4 1024.1 1018.6 1017.9 1016.6 1014.5 1017.0 1014.5 1016.2 1022.7 1023.3 1022.0 1024.1 DAY 23 7 26 15 29 19 4 30 9 29 23 22 MIN. QNH PRESSURE IN HPA 995.4 1001.7 999.4 1006.0 1004.3 1005.0 1001.1 1001.8 1009.6 1007.9 1008.7 1002.1 995.4 DAY 18 26 6 27 13 27 14 7 28 8 29 6 MEAN QFF PRESSURE IN HPA 1018.2 1021.3 1010.5 1008.1 1004.1 1002.7 998.0 999.9 1003.7 1011.6 1014.0 1016.6 1009.1 MAX. QFF PRESSURE IN HPA 1027.1 1033.0 1021.0 1015.9 1012.2 1010.0 1010.6 1005.1 1008.2 1021.9 1027.6 1026.7 1033.0 DAY 22 7 29 4 10 5 4 15 30 12 23 22 MIN. QFF PRESSURE IN HPA 999.1 1004.4 999.9 1000.4 997.4 995.7 990.8 988.9 1000.5 1000.8 1008.9 1002.1 988.9 DAY 18 26 6 19 25 27 14 7 3 8 15 6 ======================================================================================================================= 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 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.5 0.5 8.4 13.0 17.5 20.7 24.0 23.8 19.8 12.7 4.3 0.7 12.2 MINIMUN AIR TEMPERATURE (C) -2.4 -4.0 3.4 7.3 11.0 13.8 16.9 16.7 13.3 7.5 0.5 -1.1 6.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 8 15 0 0 0 0 0 0 0 0 6 2 31 DAYS WITH FREEZING MIN.<= 0 30 23 5 0 0 0 0 0 0 0 14 27 99 TEMPERATURE RECORDS LOWEST(C) -7.0 -12.0 -1.0 1.0 6.0 9.0 10.0 14.0 9.0 2.0 -7.0 -5.0 -12.0 DAY 19 1 15 6 4 21 12 4 25 29 22 2 MAXIMUM AIR TEMPERATURE (C) 5.5 7.7 15.2 20.0 25.6 29.0 32.4 32.4 28.5 21.0 10.6 4.6 19.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 5 13 25 28 12 0 0 0 83 DAYS WITH MAXIMUM TEMP. <= 0 0 2 0 0 0 0 0 0 0 0 0 5 7 TEMPERATURE RECORDS HIGHEST(C) 12.0 14.0 20.0 29.0 31.0 35.0 37.0 37.0 33.0 26.0 16.0 20.0 37.0 DAY 16 20 21 27 14 30 1 29 1 4 6 4 DIF. BETWEEN (MAX.-MIN.) (C) 7.9 11.7 11.8 12.7 14.6 15.2 15.5 15.7 15.2 13.5 10.1 5.7 12.5 MEAN DAILY TEMP. (MDT) (C) 1.6 1.9 9.3 13.6 18.3 21.4 24.6 24.5 20.9 14.2 5.5 1.8 13.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 5.5 40.5 120.0 110.5 25.5 0.0 0.0 0.0 302.0 HEATING DEG. DAYS(BASE 18 0C) 509.0 452.0 269.5 135.5 34.0 2.0 0.5 0.0 4.0 116.5 373.5 502.5 2399.0 DEWPOINT (MEAN C) -2.5 -3.4 -0.4 2.3 7.2 9.7 10.8 11.1 8.0 5.5 -0.2 -2.2 3.8 MIXING RATIO (G/KG) 3.74 3.56 4.41 5.39 7.67 8.97 9.76 9.85 7.99 6.73 4.58 3.82 6.37 VAPOUR PRESSURE (HPA) 5.15 4.93 6.05 7.40 10.52 12.23 13.25 13.41 10.93 9.27 6.35 5.29 8.73 SATURATION DEF. (HPA) 1.36 1.94 5.46 8.49 10.64 13.54 18.40 17.56 13.45 6.21 2.39 1.28 8.39 RELATIVE HUMIDITY (MEAN %) 81 76 56 52 54 53 46 48 50 64 74 81 61 RELATIVE HUMIDITY (MAX. %) 90 86 74 74 74 73 64 66 67 80 87 89 77 RELATIVE HUMIDITY (MIN. %) 66 62 37 32 36 33 29 30 31 43 56 71 44 RELATIVE HUMIDITY (MEAN% 03UTC) 88 83 71 67 71 71 63 64 63 78 81 86 74 RELATIVE HUMIDITY (MEAN% 09UTC) 72 69 45 40 42 39 37 37 40 49 62 76 51 RELATIVE HUMIDITY (MEAN% 15UTC) 80 72 47 44 43 40 34 35 41 61 75 80 54 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 45.6 24.0 21.6 24.6 48.5 12.1 1.4 1.0 4.0 13.1 8.1 20.4 224.4 DAYS WITH PRECIPITATION >=10 2 2 1 0 2 0 0 0 0 0 0 1 8 DAYS WITH PRECIPITATION >= 5 2 2 2 2 4 1 0 0 0 1 0 2 16 DAYS WITH PRECIPITATION >= 1 6 2 3 7 9 4 1 1 2 5 3 3 46 DAYS WITH PRECIPITATION 9 2 5 12 12 5 2 2 3 5 9 7 73 GREATEST DAILY PRECIPITATION 24.0 14.0 13.0 6.0 14.0 5.0 1.4 1.0 2.0 5.0 2.4 12.0 24.0 DAY 18 22 9 5 30 11 9 4 19 10 6 8 DAY WITH THUNDER STORM 0 0 0 3 5 1 0 0 0 3 0 0 12 DAYS WITH SNOW OR SLEET 8 0 0 0 0 0 0 0 0 0 0 4 12 DAYS WITH DUST 0 0 0 2 1 0 0 0 1 0 0 1 5 WIND DIRECTION (PREVAILING) 180 135 225 225 225 180 90 90 180 180 135 135 180 PREVAILING WIND SPEED(KNOTS) 4.1 2.3 10.7 11.7 6.2 3.1 3.1 3.8 4.0 2.1 2.4 2.1 3.3 PREVAILING WIND PERCENT 7.7 8.5 29.0 27.9 19.8 22.1 13.3 14.9 20.4 15.3 28.3 16.1 12.8 CALMS PERCENT OF WIND 83.5 77.2 29.8 24.2 25.8 29.6 42.3 44.4 29.2 27.8 22.1 48.8 40.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 199 187 218 223 188 177 156 86 176 170 166 149 195 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.5 3.6 3.3 1.2 1.0 0.3 0.5 1.6 0.6 1.0 0.7 1.1 WIND STEADINESES (MEAN %) 75.0 62.5 70.6 66.0 40.0 41.7 14.3 20.8 47.1 25.0 35.7 58.3 42.3 WIND SPEED (MEAN KNOTS) 0.8 0.8 5.1 5.0 3.0 2.4 2.1 2.4 3.4 2.4 2.8 1.2 2.6 FASTEST WIND DIRECTION 230 230 60 230 230 160 250 300 250 230 310 250 60 FASTEST WIND SPEED (KNOTS) 13 13 50 30 24 18 18 50 28 13 24 10 50 DAY 7 24 29 2 2 20 7 1 30 17 20 4 DAYS WITH SKY CLEAR (0-2)/8 4 21 9 7 15 20 28 27 27 16 12 2 188 DAYS WITH P.CLOUDY (3-6)/8 18 6 19 13 15 10 2 3 2 11 9 12 120 DAYS WITH CLOUDY (7-8)/8 9 1 3 10 1 0 1 1 1 4 9 17 57 DAYS WITH VISIBILITY =< 2 KM 7 0 0 1 0 0 0 0 0 0 0 0 8 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 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 863.6 866.2 861.1 861.8 864.7 860.9 858.3 860.7 862.2 866.2 869.4 866.1 863.4 MAX. QFE PRESSURE IN HPA 872.3 873.7 869.6 872.0 875.0 867.0 866.6 868.3 870.3 873.4 878.1 873.9 878.1 DAY-HOUR 14- 6 13- 9 1- 6 24- 6 13- 6 13- 6 15- 6 4- 6 24- 6 31- 6 22- 6 19- 6 MIN. QFE PRESSURE IN HPA 846.8 856.0 849.7 850.5 855.9 854.6 850.3 853.8 855.3 859.0 857.3 856.1 846.8 DAY-HOUR 31- 3 5-15 24- 3 20- 3 21-12 20-12 9-12 7-15 10-15 27-15 30-21 8-15 MEAN QNH PRESSURE IN HPA 1011.6 1014.5 1008.7 1009.5 1012.8 1008.5 1005.6 1008.3 1009.9 1014.6 1018.1 1014.4 1011.4 MAX. QNH PRESSURE IN HPA 1021.5 1023.0 1018.4 1021.1 1024.5 1015.4 1015.0 1016.9 1019.2 1022.7 1028.0 1023.3 1028.0 DAY-HOUR 14- 6 13- 9 1- 6 24- 6 13- 6 13- 6 15- 6 4- 6 24- 6 31- 6 22- 6 19- 6 MIN. QNH PRESSURE IN HPA 992.5 1002.9 995.8 996.7 1002.8 1001.3 996.4 1000.4 1002.1 1006.3 1004.4 1003.0 992.5 DAY-HOUR 31- 3 5-15 24- 3 20- 3 21-12 20-12 9-12 7-15 10-15 27-15 30-21 8-15 MEAN QFF PRESSURE IN HPA 1014.7 1017.9 1007.2 1005.5 1006.3 1000.2 995.4 998.3 1002.1 1010.6 1019.3 1017.6 1007.9 MAX. QFF PRESSURE IN HPA 1025.9 1027.6 1019.2 1018.8 1017.4 1008.6 1007.8 1010.1 1015.0 1023.1 1034.2 1027.7 1034.2 DAY-HOUR 14- 6 13- 6 1- 6 24- 6 13- 6 13- 6 14- 6 4- 6 24- 6 31- 6 22- 6 19- 6 MIN. QFF PRESSURE IN HPA 994.4 1006.7 993.7 993.8 994.4 991.2 986.3 990.6 993.0 1001.6 1005.8 1001.7 986.3 DAY-HOUR 31- 0 22-15 24- 0 20- 0 21-12 30-21 8-12 7-15 1-12 17- 9 30-21 8-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 863.6 866.1 861.1 861.9 864.7 861.3 858.8 861.3 862.5 866.4 869.6 866.0 863.6 MAX. QFE PRESSURE IN HPA 870.8 872.0 868.9 870.7 872.9 866.4 865.5 865.6 869.2 871.0 876.5 872.9 876.5 DAY 14 13 1 24 13 13 15 5 24 23 22 20 MIN. QFE PRESSURE IN HPA 847.6 859.7 850.0 850.7 859.7 856.4 852.8 855.9 857.7 860.9 861.5 856.3 847.6 DAY 31 3 24 20 3 20 11 7 2 17 30 9 MEAN QNH PRESSURE IN HPA 1011.5 1014.4 1008.7 1009.6 1012.8 1009.0 1006.1 1008.9 1010.3 1014.7 1018.4 1014.3 1011.6 MAX. QNH PRESSURE IN HPA 1019.7 1021.1 1017.6 1019.6 1022.1 1014.7 1013.7 1013.8 1017.9 1020.0 1026.2 1022.1 1026.2 DAY 14 13 1 24 13 13 15 5 24 23 22 20 MIN. QNH PRESSURE IN HPA 993.4 1007.1 996.1 996.9 1007.1 1003.4 999.3 1002.8 1004.9 1008.5 1009.2 1003.3 993.4 DAY 31 3 24 20 3 20 11 7 2 17 30 9 MEAN QFF PRESSURE IN HPA 1014.0 1017.0 1006.8 1005.3 1005.8 1000.5 995.5 998.3 1001.8 1009.9 1018.8 1016.9 1007.6 MAX. QFF PRESSURE IN HPA 1022.9 1023.8 1016.8 1017.1 1014.8 1007.4 1005.5 1005.7 1014.0 1017.1 1031.9 1026.5 1031.9 DAY 13 13 1 24 13 12 14 4 24 31 22 20 MIN. QFF PRESSURE IN HPA 994.4 1006.8 993.7 993.8 999.0 994.6 987.9 992.8 994.8 1002.4 1009.5 1001.8 987.9 DAY 31 22 24 20 26 18 3 7 2 17 7 9 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 863.6 866.3 861.2 861.9 865.0 861.5 859.0 861.7 862.9 866.6 869.7 866.1 863.8 MAX. QFE PRESSURE IN HPA 871.2 872.4 869.0 870.7 873.9 866.5 866.4 866.9 869.5 872.2 877.4 873.0 877.4 DAY 14 13 1 24 13 13 15 4 24 31 22 20 MIN. QFE PRESSURE IN HPA 846.8 859.2 849.7 850.5 860.2 856.4 853.2 856.1 858.0 860.7 860.9 856.3 846.8 DAY 31 3 24 20 3 20 3 7 2 17 30 9 MEAN QNH PRESSURE IN HPA 1011.5 1014.6 1008.9 1009.7 1013.1 1009.2 1006.3 1009.4 1010.8 1014.9 1018.5 1014.4 1011.8 MAX. QNH PRESSURE IN HPA 1020.2 1021.6 1017.7 1019.6 1023.3 1014.9 1014.7 1015.3 1018.3 1021.3 1027.2 1022.3 1027.2 DAY 14 13 1 24 13 13 15 4 24 31 22 20 MIN. QNH PRESSURE IN HPA 992.5 1006.6 995.8 996.7 1007.7 1003.4 999.7 1003.0 1005.2 1008.3 1008.5 1003.3 992.5 DAY 31 3 24 20 3 20 3 7 2 17 30 9 MEAN QFF PRESSURE IN HPA 1015.1 1018.8 1007.9 1006.3 1007.3 1001.5 996.7 999.7 1003.7 1011.8 1020.5 1017.8 1008.9 MAX. QFF PRESSURE IN HPA 1024.1 1026.1 1018.5 1017.7 1016.8 1007.9 1007.3 1008.5 1014.5 1021.2 1034.0 1027.1 1034.0 DAY 14 13 1 24 13 13 15 4 24 31 22 20 MIN. QFF PRESSURE IN HPA 994.6 1007.8 994.7 994.4 1000.5 995.5 988.4 993.5 996.2 1003.7 1011.4 1002.4 988.4 DAY 31 22 24 20 26 20 3 7 2 17 28 9 ======================================================================================================================= 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 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 864.4 867.1 862.1 862.6 866.2 861.9 859.4 862.1 863.4 867.4 870.6 867.0 864.5 MAX. QFE PRESSURE IN HPA 872.3 873.5 869.6 872.0 875.0 867.0 866.6 868.3 870.3 873.4 878.1 873.9 878.1 DAY 14 13 1 24 13 13 15 4 24 31 22 19 MIN. QFE PRESSURE IN HPA 847.6 859.9 851.9 852.0 861.0 856.2 852.6 857.1 858.2 861.0 861.4 857.2 847.6 DAY 31 5 24 20 2 20 4 7 10 17 30 9 MEAN QNH PRESSURE IN HPA 1012.4 1015.6 1009.9 1010.5 1014.5 1009.6 1006.8 1009.8 1011.4 1015.9 1019.5 1015.4 1012.6 MAX. QNH PRESSURE IN HPA 1021.5 1022.8 1018.4 1021.1 1024.5 1015.4 1015.0 1016.9 1019.2 1022.7 1028.0 1023.3 1028.0 DAY 14 13 1 24 13 13 15 4 24 31 22 19 MIN. QNH PRESSURE IN HPA 993.4 1007.4 998.3 998.4 1008.6 1003.2 999.1 1004.2 1005.4 1008.6 1009.1 1004.3 993.4 DAY 31 5 24 20 2 20 4 7 10 17 30 9 MEAN QFF PRESSURE IN HPA 1016.3 1020.1 1009.0 1006.7 1008.3 1001.6 997.0 1000.4 1004.1 1012.8 1021.3 1019.0 1009.7 MAX. QFF PRESSURE IN HPA 1025.9 1027.6 1019.2 1018.8 1017.4 1008.6 1007.8 1010.1 1015.0 1023.1 1034.2 1027.7 1034.2 DAY 14 13 1 24 13 13 14 4 24 31 22 19 MIN. QFF PRESSURE IN HPA 996.5 1008.0 995.0 995.6 1002.6 994.6 989.1 994.3 996.4 1003.4 1011.7 1004.2 989.1 DAY 31 22 14 20 26 20 3 1 1 17 6 9 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 864.1 866.7 861.8 862.3 865.7 861.5 858.9 861.4 862.6 866.7 869.9 866.5 864.0 MAX. QFE PRESSURE IN HPA 871.5 873.7 868.1 871.9 874.3 866.5 866.4 867.0 868.9 872.7 877.2 873.4 877.2 DAY 14 13 1 24 13 12 15 4 24 31 22 19 MIN. QFE PRESSURE IN HPA 850.8 858.0 852.7 853.2 860.8 855.1 851.6 856.6 857.4 860.4 859.9 857.1 850.8 DAY 31 5 14 20 1 20 10 7 10 17 30 9 MEAN QNH PRESSURE IN HPA 1012.2 1015.1 1009.5 1010.1 1013.9 1009.2 1006.2 1009.1 1010.5 1015.1 1018.7 1014.9 1012.0 MAX. QNH PRESSURE IN HPA 1020.5 1023.0 1016.7 1021.0 1023.7 1014.9 1014.7 1015.4 1017.6 1021.9 1027.0 1022.7 1027.0 DAY 14 13 1 24 13 12 15 4 24 31 22 19 MIN. QNH PRESSURE IN HPA 997.0 1005.2 999.2 999.7 1008.4 1001.9 997.9 1003.6 1004.5 1007.9 1007.4 1004.2 997.0 DAY 31 5 14 20 1 20 10 7 10 17 30 9 MEAN QFF PRESSURE IN HPA 1014.8 1017.7 1007.6 1005.5 1006.9 1000.3 995.7 998.7 1002.0 1010.3 1019.0 1017.6 1008.0 MAX. QFF PRESSURE IN HPA 1023.2 1025.7 1015.7 1017.1 1015.2 1008.2 1006.3 1007.9 1012.5 1021.7 1031.7 1027.0 1031.7 DAY 14 13 1 24 13 12 15 4 24 31 22 19 MIN. QFF PRESSURE IN HPA 998.8 1007.2 996.0 995.7 1000.3 992.8 988.5 992.1 994.2 1001.6 1009.4 1003.4 988.5 DAY 30 22 14 20 26 20 3 29 1 17 30 8 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 863.0 865.7 860.5 861.6 863.9 860.3 857.9 860.1 861.2 865.4 868.7 865.5 862.8 MAX. QFE PRESSURE IN HPA 870.4 871.5 866.5 870.5 872.6 865.4 864.3 866.1 868.6 871.7 875.8 872.2 875.8 DAY 14 13 1 24 13 12 14 4 24 31 22 19 MIN. QFE PRESSURE IN HPA 849.1 856.5 852.0 853.2 855.9 854.6 850.3 854.7 855.4 859.2 858.0 856.3 849.1 DAY 30 5 23 20 21 20 9 7 10 27 30 8 MEAN QNH PRESSURE IN HPA 1010.9 1013.9 1008.0 1009.3 1012.0 1007.8 1005.0 1007.6 1008.8 1013.6 1017.3 1013.7 1010.7 MAX. QNH PRESSURE IN HPA 1019.3 1020.5 1014.9 1019.4 1021.8 1013.6 1012.4 1014.4 1017.2 1020.8 1025.4 1021.3 1025.4 DAY 14 13 1 24 13 12 14 4 24 31 22 19 MIN. QNH PRESSURE IN HPA 995.1 1003.5 998.4 999.7 1002.8 1001.3 996.4 1001.4 1002.2 1006.6 1005.2 1003.3 995.1 DAY 30 5 23 20 21 20 9 7 10 27 30 8 MEAN QFF PRESSURE IN HPA 1013.4 1016.1 1005.9 1004.8 1004.8 999.1 994.3 996.9 1000.2 1008.8 1017.7 1016.3 1006.5 MAX. QFF PRESSURE IN HPA 1022.0 1022.8 1013.8 1016.2 1013.2 1006.6 1004.1 1005.9 1011.2 1020.1 1029.9 1025.5 1029.9 DAY 19 13 1 24 13 12 14 4 24 31 22 19 MIN. QFF PRESSURE IN HPA 996.4 1007.2 995.5 995.8 994.4 991.3 986.3 991.2 993.0 1002.1 1006.7 1001.9 986.3 DAY 30 22 23 20 21 30 8 16 1 27 30 8 ======================================================================================================================= 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 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 863.4 865.7 860.5 861.2 863.7 859.9 857.0 859.4 861.0 865.5 868.9 865.8 862.7 MAX. QFE PRESSURE IN HPA 870.0 871.8 866.0 870.3 871.3 865.2 863.3 865.1 867.7 872.1 874.4 872.4 874.4 DAY 12 13 1 24 13 12 14 4 24 31 22 19 MIN. QFE PRESSURE IN HPA 849.9 856.0 851.1 852.4 858.7 855.5 850.3 853.8 855.3 859.0 859.4 856.1 849.9 DAY 30 5 23 19 2 30 10 7 10 27 30 8 MEAN QNH PRESSURE IN HPA 1011.4 1014.0 1008.1 1008.8 1011.7 1007.4 1004.0 1006.7 1008.7 1013.8 1017.5 1014.1 1010.5 MAX. QNH PRESSURE IN HPA 1018.8 1020.9 1014.3 1019.2 1020.3 1013.4 1011.2 1013.3 1016.2 1021.2 1023.8 1021.6 1023.8 DAY 12 13 1 24 13 12 14 4 24 31 22 19 MIN. QNH PRESSURE IN HPA 996.0 1002.9 997.3 998.8 1006.0 1002.4 996.4 1000.4 1002.1 1006.3 1006.8 1003.0 996.0 DAY 30 5 23 19 2 30 10 7 10 27 30 8 MEAN QFF PRESSURE IN HPA 1015.0 1017.9 1007.0 1005.4 1005.8 999.5 994.3 997.0 1001.4 1010.6 1019.4 1017.5 1007.6 MAX. QFF PRESSURE IN HPA 1025.4 1025.1 1014.8 1016.5 1013.3 1007.0 1003.8 1005.1 1011.4 1022.2 1030.1 1026.2 1030.1 DAY 19 13 1 24 13 12 12 4 24 31 22 19 MIN. QFF PRESSURE IN HPA 998.1 1006.7 995.7 996.8 998.3 991.6 986.8 990.6 993.4 1003.3 1009.0 1002.2 986.8 DAY 30 22 23 19 25 30 8 7 1 27 6 8 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 863.5 866.0 860.6 861.4 864.0 860.3 857.6 859.9 861.5 865.9 868.9 866.1 863.0 MAX. QFE PRESSURE IN HPA 870.3 871.9 865.9 870.0 870.8 866.2 864.2 865.2 867.7 872.2 874.7 872.8 874.7 DAY 12 13 1 24 13 12 13 4 24 31 21 19 MIN. QFE PRESSURE IN HPA 849.5 857.6 850.8 851.8 859.1 855.8 850.7 854.8 856.0 860.3 858.8 856.2 849.5 DAY 30 5 23 19 2 30 8 7 10 27 30 8 MEAN QNH PRESSURE IN HPA 1011.4 1014.3 1008.2 1009.0 1012.1 1007.8 1004.8 1007.3 1009.2 1014.1 1017.6 1014.4 1010.9 MAX. QNH PRESSURE IN HPA 1019.2 1021.0 1014.2 1018.8 1019.7 1014.5 1012.2 1013.4 1016.2 1021.3 1024.2 1022.0 1024.2 DAY 12 13 1 24 13 12 13 4 24 31 21 19 MIN. QNH PRESSURE IN HPA 995.5 1004.7 997.0 998.1 1006.4 1002.7 996.9 1001.6 1002.9 1007.8 1006.1 1003.2 995.5 DAY 30 5 23 19 2 30 8 7 10 27 30 8 MEAN QFF PRESSURE IN HPA 1015.3 1018.6 1007.2 1005.3 1005.8 999.7 995.0 997.9 1002.1 1011.1 1019.4 1018.1 1008.0 MAX. QFF PRESSURE IN HPA 1023.4 1025.3 1014.4 1016.8 1013.6 1007.9 1004.8 1006.2 1011.9 1023.1 1030.2 1026.8 1030.2 DAY 12 13 1 23 13 12 13 4 24 31 21 19 MIN. QFF PRESSURE IN HPA 998.1 1008.1 995.0 996.0 999.0 991.5 988.2 992.1 994.0 1005.2 1008.5 1002.8 988.2 DAY 30 22 23 19 25 30 8 7 1 27 30 8 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 863.4 866.2 860.8 861.5 864.4 860.7 858.2 860.3 862.1 866.2 869.0 866.2 863.2 MAX. QFE PRESSURE IN HPA 870.5 871.9 865.7 870.3 871.7 866.3 864.6 865.4 867.8 872.4 875.5 872.8 875.5 DAY 12 13 31 23 12 12 14 4 23 31 21 19 MIN. QFE PRESSURE IN HPA 848.5 858.6 850.5 851.1 859.4 856.0 851.4 855.5 856.9 861.1 857.3 856.3 848.5 DAY 30 5 23 19 2 30 8 7 10 16 30 8 MEAN QNH PRESSURE IN HPA 1011.4 1014.5 1008.4 1009.2 1012.4 1008.3 1005.4 1007.8 1009.8 1014.5 1017.7 1014.5 1011.2 MAX. QNH PRESSURE IN HPA 1019.4 1021.0 1014.0 1019.2 1020.8 1014.6 1012.7 1013.6 1016.3 1021.6 1025.1 1022.0 1025.1 DAY 12 13 31 23 12 12 14 4 23 31 21 19 MIN. QNH PRESSURE IN HPA 994.4 1005.9 996.7 997.3 1006.8 1002.9 997.7 1002.4 1003.9 1008.7 1004.4 1003.3 994.4 DAY 30 5 23 19 2 30 8 7 10 16 30 8 MEAN QFF PRESSURE IN HPA 1014.1 1017.1 1006.4 1004.6 1005.5 999.5 995.1 997.6 1001.6 1009.9 1018.1 1017.4 1007.2 MAX. QFF PRESSURE IN HPA 1022.6 1023.8 1012.2 1016.4 1012.7 1007.4 1004.6 1005.8 1012.0 1022.3 1030.3 1026.5 1030.3 DAY 12 13 1 23 12 12 14 4 23 31 21 19 MIN. QFF PRESSURE IN HPA 995.4 1008.2 994.1 994.2 998.1 991.2 988.5 992.3 993.7 1003.0 1005.8 1001.7 988.5 DAY 30 22 23 19 25 30 8 7 1 16 30 8 ======================================================================================================================= 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 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.3 -3.0 2.9 14.2 16.0 20.9 25.4 23.9 18.9 13.0 6.4 0.3 11.6 MINIMUN AIR TEMPERATURE (C) -3.4 -6.6 -1.7 8.0 10.7 14.0 18.2 16.9 12.0 7.8 3.0 -2.9 6.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 0 0 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 15 22 10 0 0 0 0 0 0 0 0 12 59 DAYS WITH FREEZING MIN.<= 0 28 28 18 0 0 0 0 0 0 0 8 28 110 TEMPERATURE RECORDS LOWEST(C) -8.0 -13.0 -11.0 1.0 7.0 8.0 15.0 12.0 8.0 3.0 -2.0 -9.0 -13.0 DAY 24 21 9 7 21 6 4 27 24 8 26 14 MAXIMUM AIR TEMPERATURE (C) 6.5 2.9 8.7 21.3 23.1 28.7 33.3 31.6 27.4 20.7 11.9 5.6 18.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 16 29 26 4 0 0 0 78 DAYS WITH MAXIMUM TEMP. <= 0 0 8 2 0 0 0 0 0 0 0 0 2 12 TEMPERATURE RECORDS HIGHEST(C) 12.0 8.0 17.0 29.0 31.0 35.0 38.0 36.0 33.0 27.0 20.0 11.0 38.0 DAY 30 1 17 22 28 23 17 6 1 1 5 9 DIF. BETWEEN (MAX.-MIN.) (C) 9.9 9.5 10.4 13.3 12.4 14.7 15.1 14.7 15.4 12.9 8.9 8.5 12.2 MEAN DAILY TEMP. (MDT) (C) 1.6 -1.9 3.5 14.6 16.9 21.4 25.8 24.3 19.7 14.2 7.4 1.4 12.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.5 48.5 147.5 109.0 10.5 0.0 0.0 0.0 319.0 HEATING DEG. DAYS(BASE 18 0C) 509.0 556.5 449.5 110.5 58.0 11.0 0.0 0.5 9.5 95.5 317.0 515.0 2632.0 DEWPOINT (MEAN C) -3.7 -7.0 -1.8 3.5 8.8 9.9 11.9 10.5 6.9 4.5 0.5 -3.6 3.4 MIXING RATIO (G/KG) 3.43 2.68 4.05 5.85 8.39 9.11 10.44 9.46 7.43 6.26 4.69 3.42 6.27 VAPOUR PRESSURE (HPA) 4.75 3.69 5.58 8.03 11.46 12.42 14.16 12.86 10.15 8.62 6.48 4.75 8.58 SATURATION DEF. (HPA) 1.72 1.39 2.52 9.27 7.69 13.88 19.70 18.21 12.96 7.12 3.65 1.69 8.32 RELATIVE HUMIDITY (MEAN %) 76 75 73 52 65 52 46 45 48 59 68 76 61 RELATIVE HUMIDITY (MAX. %) 86 83 84 70 82 71 64 60 64 75 82 86 76 RELATIVE HUMIDITY (MIN. %) 57 61 58 33 47 35 30 30 31 39 50 60 44 RELATIVE HUMIDITY (MEAN% 03UTC) 84 80 82 68 80 69 63 59 63 73 75 83 73 RELATIVE HUMIDITY (MEAN% 09UTC) 66 69 65 41 53 42 36 39 38 45 55 65 51 RELATIVE HUMIDITY (MEAN% 15UTC) 75 74 70 42 58 41 35 34 39 56 71 78 56 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 24.9 17.7 69.6 23.3 80.7 22.4 3.0 0.0 1.0 5.9 28.1 2.4 279.0 DAYS WITH PRECIPITATION >=10 0 0 3 0 4 1 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 5 2 2 5 1 7 2 0 0 0 0 3 0 22 DAYS WITH PRECIPITATION >= 1 6 4 10 8 13 2 1 0 1 3 6 1 55 DAYS WITH PRECIPITATION 8 8 11 9 17 4 1 0 2 5 9 2 76 GREATEST DAILY PRECIPITATION 8.1 9.0 24.0 8.5 15.0 17.0 3.0 0.0 1.0 3.0 8.0 2.0 24.0 DAY 21 25 22 15 9 1 26 ** 23 28 19 12 DAY WITH THUNDER STORM 0 0 1 3 9 5 0 0 0 1 0 0 19 DAYS WITH SNOW OR SLEET 4 9 6 0 0 0 0 0 0 0 7 2 28 DAYS WITH DUST 0 1 0 0 0 0 1 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 180 225 225 225 135 90 90 90 90 135 180 180 180 PREVAILING WIND SPEED(KNOTS) 2.1 4.4 3.4 9.2 3.0 2.7 2.6 3.2 3.4 3.5 2.7 2.1 3.0 PREVAILING WIND PERCENT 19.4 19.6 14.2 23.8 20.2 16.3 8.5 13.4 14.6 13.4 26.8 44.9 13.7 CALMS PERCENT OF WIND 39.7 38.8 53.8 25.9 36.0 46.0 73.4 54.7 65.7 55.5 41.0 33.6 47.1 NO. OF WIND OBSERVATION 247 224 247 239 247 239 248 247 239 247 239 247 2910 VECTOR WIND DIRECTION (MEAN) 179 214 204 207 171 140 75 114 123 203 159 170 181 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.0 0.8 2.8 1.1 0.7 0.2 0.6 0.8 1.9 1.3 1.1 0.9 WIND STEADINESES (MEAN %) 52.9 41.7 57.1 62.2 52.4 41.2 25.0 37.5 57.1 63.3 72.2 73.3 45.0 WIND SPEED (MEAN KNOTS) 1.7 2.4 1.4 4.5 2.1 1.7 0.8 1.6 1.4 3.0 1.8 1.5 2.0 FASTEST WIND DIRECTION 250 160 180 210 230 230 180 230 180 230 50 180 210 FASTEST WIND SPEED (KNOTS) 25 18 15 38 18 15 13 18 23 38 9 5 38 DAY 31 24 28 4 22 16 11 18 30 14 2 1 DAYS WITH SKY CLEAR (0-2)/8 16 12 5 17 8 27 27 27 28 23 13 12 215 DAYS WITH P.CLOUDY (3-6)/8 10 7 15 11 16 2 4 2 2 6 7 10 92 DAYS WITH CLOUDY (7-8)/8 5 9 11 2 7 1 0 2 0 2 10 9 58 DAYS WITH VISIBILITY =< 2 KM 2 1 4 0 0 0 0 0 0 0 3 0 10 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 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 865.4 860.9 862.8 863.0 861.3 861.0 858.1 858.7 860.5 866.3 867.5 870.0 863.0 MAX. QFE PRESSURE IN HPA 872.7 870.1 868.6 871.8 866.3 867.1 863.7 864.8 868.5 873.8 874.8 877.4 877.4 DAY-HOUR 2- 6 2-15 14- 6 8- 9 3- 6 21- 6 14- 6 29- 6 24- 6 26- 6 3- 6 14- 9 MIN. QFE PRESSURE IN HPA 855.3 846.0 852.1 852.7 852.8 853.2 853.4 853.6 853.5 859.7 860.0 861.9 846.0 DAY-HOUR 19-12 25- 9 26-18 6-12 19- 3 27-15 21-15 9-15 11-15 6-15 24-21 20-15 MEAN QNH PRESSURE IN HPA 1013.6 1008.5 1010.6 1010.9 1009.0 1008.6 1005.3 1005.9 1008.0 1014.6 1016.0 1018.8 1010.8 MAX. QNH PRESSURE IN HPA 1021.9 1019.0 1017.2 1020.9 1014.6 1015.5 1011.7 1012.9 1017.1 1023.2 1024.3 1027.2 1027.2 DAY-HOUR 2- 6 2-15 14- 6 8- 9 3- 6 21- 6 14- 6 29- 6 24- 6 26- 6 3- 6 14- 9 MIN. QNH PRESSURE IN HPA 1002.1 991.5 998.5 999.2 999.3 999.7 1000.0 1000.2 1000.1 1007.1 1007.5 1009.6 991.5 DAY-HOUR 19-12 25- 9 26-18 6-12 19- 3 27-15 21-15 9-15 11-15 6-15 24-21 20-15 MEAN QFF PRESSURE IN HPA 1017.0 1013.7 1012.4 1006.3 1003.0 1000.1 994.4 995.9 1000.7 1010.7 1015.8 1022.4 1007.7 MAX. QFF PRESSURE IN HPA 1028.4 1024.8 1023.1 1018.8 1010.2 1008.4 1001.6 1005.2 1012.7 1019.5 1025.4 1033.8 1033.8 DAY-HOUR 2- 6 10-18 9- 6 8- 9 13- 3 10- 3 14- 6 26- 3 24- 6 20- 3 22- 6 14-18 MIN. QFF PRESSURE IN HPA 1003.6 994.3 998.2 996.7 995.2 990.2 989.2 989.0 992.8 1000.4 1005.1 1010.1 989.0 DAY-HOUR 19-12 25- 9 17-12 5-21 28-12 27-15 21-15 18-12 11-15 1- 0 10-18 20- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 865.5 861.0 862.8 863.1 861.5 861.3 858.6 859.2 861.0 866.3 867.7 870.2 863.2 MAX. QFE PRESSURE IN HPA 870.2 869.7 867.5 870.5 865.0 866.6 862.1 863.7 867.5 871.9 873.9 876.1 876.1 DAY 3 3 21 9 13 21 14 29 24 26 3 14 MIN. QFE PRESSURE IN HPA 858.8 848.8 856.5 853.4 853.2 855.8 855.4 855.9 856.0 861.1 862.5 863.6 848.8 DAY 20 25 17 6 19 28 11 19 12 7 19 20 MEAN QNH PRESSURE IN HPA 1013.7 1008.7 1010.7 1011.0 1009.2 1009.0 1005.9 1006.6 1008.6 1014.7 1016.3 1019.1 1011.1 MAX. QNH PRESSURE IN HPA 1019.1 1018.5 1016.0 1019.4 1013.2 1015.0 1009.9 1011.7 1016.0 1021.0 1023.3 1025.8 1025.8 DAY 3 3 21 9 13 21 14 29 24 26 3 14 MIN. QNH PRESSURE IN HPA 1006.1 994.7 1003.5 1000.0 999.7 1002.7 1002.2 1002.8 1002.9 1008.7 1010.3 1011.6 994.7 DAY 20 25 17 6 19 28 11 19 12 7 19 20 MEAN QFF PRESSURE IN HPA 1016.3 1013.4 1012.0 1006.1 1002.9 1000.1 994.6 996.1 1000.6 1009.9 1015.6 1022.2 1007.5 MAX. QFF PRESSURE IN HPA 1023.8 1021.7 1020.6 1016.9 1008.5 1006.9 999.2 1004.0 1010.8 1016.0 1023.4 1031.1 1031.1 DAY 3 11 9 9 13 10 3 27 24 20 22 14 MIN. QFF PRESSURE IN HPA 1005.4 996.5 1000.2 996.9 995.9 992.4 990.4 990.9 994.0 1000.4 1008.0 1012.8 990.4 DAY 31 25 17 6 19 28 11 19 12 1 19 20 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 865.6 861.1 862.8 863.6 861.9 861.8 859.2 859.6 861.4 866.6 867.8 870.2 863.5 MAX. QFE PRESSURE IN HPA 871.9 869.5 867.5 870.5 865.5 866.4 863.1 864.4 868.1 872.3 874.4 876.7 876.7 DAY 2 3 21 9 13 21 14 24 28 26 3 14 MIN. QFE PRESSURE IN HPA 858.0 847.8 855.9 853.4 852.8 856.6 856.0 856.1 856.1 861.3 862.1 863.1 847.8 DAY 31 25 17 6 19 1 11 9 12 3 19 20 MEAN QNH PRESSURE IN HPA 1013.8 1008.7 1010.7 1011.5 1009.6 1009.5 1006.5 1007.0 1009.1 1015.0 1016.3 1019.1 1011.4 MAX. QNH PRESSURE IN HPA 1021.0 1018.3 1016.0 1019.4 1013.7 1014.7 1011.0 1012.5 1016.7 1021.5 1023.8 1026.5 1026.5 DAY 2 3 21 9 13 21 14 24 28 26 3 14 MIN. QNH PRESSURE IN HPA 1005.2 993.6 1002.8 1000.0 999.3 1003.6 1002.9 1003.0 1003.0 1008.9 1009.9 1011.0 993.6 DAY 31 25 17 6 19 1 11 9 12 3 19 20 MEAN QFF PRESSURE IN HPA 1018.1 1014.6 1013.2 1007.7 1004.4 1001.9 996.3 997.6 1002.5 1011.8 1016.8 1023.3 1009.0 MAX. QFF PRESSURE IN HPA 1026.9 1024.0 1022.4 1018.0 1010.2 1008.4 1001.2 1005.2 1012.6 1019.5 1024.4 1033.5 1033.5 DAY 2 10 9 9 13 10 14 26 24 20 22 14 MIN. QFF PRESSURE IN HPA 1005.6 996.4 1000.5 998.1 996.8 995.3 992.1 992.6 995.6 1002.0 1008.9 1013.0 992.1 DAY 31 25 17 6 19 28 11 9 12 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 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 866.3 861.6 863.4 864.1 862.3 862.0 859.5 859.9 862.0 867.4 868.6 870.8 864.0 MAX. QFE PRESSURE IN HPA 872.7 869.2 868.6 871.3 866.3 867.1 863.7 864.8 868.5 873.8 874.8 876.8 876.8 DAY 2 3 14 9 3 21 14 29 24 26 3 14 MIN. QFE PRESSURE IN HPA 857.3 847.3 855.4 854.7 853.4 855.9 856.4 856.4 856.8 861.7 863.2 863.5 847.3 DAY 31 25 17 6 19 1 11 9 12 3 19 20 MEAN QNH PRESSURE IN HPA 1014.6 1009.3 1011.4 1012.1 1010.1 1009.8 1006.9 1007.4 1009.7 1015.9 1017.3 1019.8 1012.0 MAX. QNH PRESSURE IN HPA 1021.9 1017.9 1017.2 1020.3 1014.6 1015.5 1011.7 1012.9 1017.1 1023.2 1024.3 1026.6 1026.6 DAY 2 3 14 9 3 21 14 29 24 26 3 14 MIN. QNH PRESSURE IN HPA 1004.4 993.0 1002.2 1001.4 1000.0 1002.8 1003.4 1003.4 1003.8 1009.4 1011.1 1011.5 993.0 DAY 31 25 17 6 19 1 11 9 12 3 19 20 MEAN QFF PRESSURE IN HPA 1019.0 1015.2 1013.6 1007.8 1004.3 1001.4 996.2 997.5 1002.7 1012.2 1017.5 1024.0 1009.3 MAX. QFF PRESSURE IN HPA 1028.4 1024.7 1023.1 1018.2 1010.0 1008.0 1001.6 1005.1 1012.7 1019.3 1025.4 1033.6 1033.6 DAY 2 10 9 8 3 10 14 26 24 20 22 14 MIN. QFF PRESSURE IN HPA 1005.2 995.6 1000.3 998.8 996.3 995.7 992.2 992.1 995.9 1002.3 1010.9 1013.3 992.1 DAY 31 25 17 24 19 28 11 9 12 3 16 20 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 865.8 861.2 863.2 863.7 861.8 861.5 858.9 859.2 861.1 866.5 867.9 870.3 863.4 MAX. QFE PRESSURE IN HPA 872.6 869.1 868.4 871.8 865.7 866.9 863.0 864.1 867.2 873.0 873.9 877.4 877.4 DAY 2 2 14 8 3 12 14 29 24 26 3 14 MIN. QFE PRESSURE IN HPA 857.3 846.0 856.4 854.0 853.7 855.1 855.6 855.6 856.5 861.6 863.1 862.4 846.0 DAY 19 25 17 6 19 1 11 9 12 3 19 20 MEAN QNH PRESSURE IN HPA 1014.0 1008.8 1011.1 1011.7 1009.6 1009.2 1006.2 1006.6 1008.7 1014.9 1016.5 1019.2 1011.4 MAX. QNH PRESSURE IN HPA 1021.8 1017.8 1017.0 1020.9 1014.0 1015.3 1010.9 1012.1 1015.7 1022.3 1023.3 1027.2 1027.2 DAY 2 2 14 8 3 12 14 29 24 26 3 14 MIN. QNH PRESSURE IN HPA 1004.4 991.5 1003.4 1000.6 1000.3 1001.9 1002.5 1002.5 1003.5 1009.3 1011.0 1010.2 991.5 DAY 19 25 17 6 19 1 11 9 12 3 19 20 MEAN QFF PRESSURE IN HPA 1016.6 1013.4 1012.4 1006.3 1003.0 1000.3 994.7 996.1 1001.1 1010.6 1015.7 1022.1 1007.7 MAX. QFF PRESSURE IN HPA 1026.1 1022.2 1020.6 1018.8 1008.9 1006.5 1000.3 1003.3 1010.1 1017.1 1023.6 1033.1 1033.1 DAY 2 10 9 8 2 10 14 27 24 20 22 14 MIN. QFF PRESSURE IN HPA 1005.4 994.3 1001.1 997.1 996.2 993.5 990.5 990.0 994.8 1000.8 1009.4 1010.1 990.0 DAY 19 25 17 24 18 29 11 9 2 3 16 20 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 864.6 860.0 862.3 862.5 860.8 860.5 857.4 857.9 859.5 865.5 866.7 869.2 862.2 MAX. QFE PRESSURE IN HPA 871.1 867.9 868.2 870.3 864.4 865.8 861.7 862.0 865.5 871.9 872.7 875.5 875.5 DAY 2 2 14 8 12 12 14 24 24 26 3 14 MIN. QFE PRESSURE IN HPA 855.3 847.3 854.8 852.7 853.7 854.5 854.7 853.8 854.8 859.9 862.0 862.3 847.3 DAY 19 25 17 6 18 27 11 18 11 6 12 20 MEAN QNH PRESSURE IN HPA 1012.7 1007.4 1010.1 1010.3 1008.4 1008.0 1004.5 1005.0 1006.9 1013.7 1015.1 1017.9 1010.0 MAX. QNH PRESSURE IN HPA 1020.1 1016.5 1016.8 1019.2 1012.5 1014.1 1009.4 1009.7 1013.7 1021.0 1021.9 1025.1 1025.1 DAY 2 2 14 8 12 12 14 24 24 26 3 14 MIN. QNH PRESSURE IN HPA 1002.1 993.0 1001.6 999.2 1000.3 1001.2 1001.4 1000.4 1001.6 1007.4 1009.7 1010.1 993.0 DAY 19 25 17 6 18 27 11 18 11 6 12 20 MEAN QFF PRESSURE IN HPA 1015.2 1012.1 1011.3 1005.2 1002.0 999.0 993.0 994.4 998.7 1009.1 1014.5 1020.9 1006.3 MAX. QFF PRESSURE IN HPA 1024.3 1021.6 1019.6 1016.8 1007.7 1006.0 998.4 1001.9 1008.0 1015.5 1022.3 1031.0 1031.0 DAY 2 10 8 8 12 9 14 26 23 20 21 14 MIN. QFF PRESSURE IN HPA 1003.6 996.9 998.2 997.1 995.2 990.4 989.4 989.0 992.8 1001.5 1005.9 1010.3 989.0 DAY 19 25 17 6 28 27 10 18 12 2 12 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 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 864.9 860.5 862.5 862.2 860.7 860.0 856.7 857.3 859.1 865.6 867.1 869.4 862.2 MAX. QFE PRESSURE IN HPA 871.4 870.1 868.2 870.7 864.2 865.1 860.5 861.7 865.2 872.0 872.4 875.8 875.8 DAY 2 2 14 8 12 12 1 28 24 26 3 14 MIN. QFE PRESSURE IN HPA 855.3 849.9 856.6 852.9 853.9 853.2 853.4 853.6 853.5 859.7 863.4 861.9 849.9 DAY 19 19 17 6 18 27 21 9 11 6 16 20 MEAN QNH PRESSURE IN HPA 1013.0 1008.1 1010.3 1010.0 1008.2 1007.4 1003.7 1004.4 1006.5 1013.9 1015.6 1018.2 1009.9 MAX. QNH PRESSURE IN HPA 1020.4 1019.0 1016.8 1019.6 1012.2 1013.3 1008.0 1009.4 1013.4 1021.1 1021.6 1025.4 1025.4 DAY 2 2 14 8 12 12 1 28 24 26 3 14 MIN. QNH PRESSURE IN HPA 1002.1 996.0 1003.6 999.4 1000.5 999.7 1000.0 1000.2 1000.1 1007.1 1011.3 1009.6 996.0 DAY 19 19 17 6 18 27 21 9 11 6 16 20 MEAN QFF PRESSURE IN HPA 1017.1 1014.0 1012.6 1005.9 1003.0 999.6 993.4 995.0 999.8 1010.9 1016.1 1022.3 1007.5 MAX. QFF PRESSURE IN HPA 1027.0 1023.4 1022.1 1018.3 1008.0 1006.2 999.1 1002.9 1009.0 1017.9 1023.4 1033.5 1033.5 DAY 2 10 8 8 12 9 1 25 23 20 21 14 MIN. QFF PRESSURE IN HPA 1004.3 1000.5 1001.5 998.3 996.5 990.2 989.2 990.3 992.8 1004.1 1009.3 1011.3 989.2 DAY 19 25 17 24 28 27 21 9 11 6 12 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 865.1 860.9 862.5 862.4 860.8 860.2 857.1 857.8 859.7 865.9 867.1 869.7 862.4 MAX. QFE PRESSURE IN HPA 871.4 869.8 868.0 870.7 864.2 865.0 860.9 862.6 865.5 871.5 872.6 876.3 876.3 DAY 2 2 14 8 16 21 1 28 23 26 2 14 MIN. QFE PRESSURE IN HPA 856.2 849.8 852.1 853.6 853.9 853.8 853.8 854.3 854.3 860.1 860.1 863.3 849.8 DAY 19 19 26 5 18 27 10 9 11 6 10 20 MEAN QNH PRESSURE IN HPA 1013.3 1008.5 1010.3 1010.2 1008.3 1007.7 1004.2 1005.0 1007.1 1014.2 1015.5 1018.5 1010.2 MAX. QNH PRESSURE IN HPA 1020.4 1018.6 1016.6 1019.6 1012.2 1013.2 1008.5 1010.4 1013.7 1020.5 1021.8 1026.0 1026.0 DAY 2 2 14 8 16 21 1 28 23 26 2 14 MIN. QNH PRESSURE IN HPA 1003.2 995.9 998.5 1000.2 1000.5 1000.4 1000.4 1001.0 1001.0 1007.6 1007.6 1011.2 995.9 DAY 19 19 26 5 18 27 10 9 11 6 10 20 MEAN QFF PRESSURE IN HPA 1017.6 1014.3 1012.4 1005.8 1002.6 999.4 993.5 995.2 1000.1 1010.8 1015.8 1022.7 1007.5 MAX. QFF PRESSURE IN HPA 1027.1 1024.8 1021.9 1018.3 1007.4 1006.0 999.1 1003.1 1009.4 1016.3 1023.6 1033.8 1033.8 DAY 2 10 8 8 2 9 1 25 23 26 21 14 MIN. QFF PRESSURE IN HPA 1005.4 1000.6 998.5 997.9 995.9 990.5 989.3 989.6 993.4 1003.3 1005.1 1013.1 989.3 DAY 19 24 26 5 18 27 21 9 1 2 10 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 865.3 861.0 862.9 862.7 861.0 860.7 857.8 858.5 860.3 866.2 867.3 870.0 862.8 MAX. QFE PRESSURE IN HPA 870.9 870.0 867.5 870.6 864.6 865.1 861.5 863.1 866.0 871.5 873.1 875.8 875.8 DAY 2 2 14 8 12 20 1 28 23 20 2 14 MIN. QFE PRESSURE IN HPA 857.0 850.1 857.2 853.6 853.6 854.6 854.5 855.1 855.0 860.5 860.0 864.0 850.1 DAY 19 24 16 5 18 27 10 18 11 6 24 20 MEAN QNH PRESSURE IN HPA 1013.6 1008.6 1010.8 1010.6 1008.7 1008.3 1005.0 1005.7 1007.8 1014.6 1015.7 1018.9 1010.7 MAX. QNH PRESSURE IN HPA 1019.9 1018.8 1016.0 1019.5 1012.7 1013.3 1009.2 1011.0 1014.3 1020.5 1022.4 1025.4 1025.4 DAY 2 2 14 8 12 20 1 28 23 20 2 14 MIN. QNH PRESSURE IN HPA 1004.1 996.2 1004.3 1000.2 1000.2 1001.3 1001.2 1001.9 1001.8 1008.0 1007.5 1012.0 996.2 DAY 19 24 16 5 18 27 10 18 11 6 24 20 MEAN QFF PRESSURE IN HPA 1016.2 1013.2 1012.1 1005.4 1002.3 999.4 993.8 995.5 1000.1 1010.1 1014.9 1021.9 1007.1 MAX. QFF PRESSURE IN HPA 1024.2 1022.1 1020.7 1017.1 1007.6 1007.7 999.2 1003.5 1009.4 1015.3 1023.6 1032.0 1032.0 DAY 2 10 8 8 2 9 1 25 23 19 21 14 MIN. QFF PRESSURE IN HPA 1005.9 997.1 1001.7 996.7 995.5 990.8 989.5 990.1 993.5 1001.7 1008.5 1012.5 989.5 DAY 19 24 16 5 18 27 10 9 11 2 15 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 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.5 4.5 4.1 10.1 18.3 21.8 24.0 23.8 20.9 14.3 6.8 2.9 12.8 MINIMUN AIR TEMPERATURE (C) -2.3 0.1 -0.1 5.7 11.0 14.3 17.0 16.5 13.5 8.1 3.6 -0.6 7.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 8 4 4 0 0 0 0 0 0 0 0 0 16 DAYS WITH FREEZING MIN.<= 0 26 14 18 0 1 0 0 0 0 0 6 26 91 TEMPERATURE RECORDS LOWEST(C) -9.0 -8.0 -8.0 1.0 0.0 10.0 14.0 12.0 10.0 5.0 -2.0 -3.0 -9.0 DAY 25 11 14 16 17 6 10 28 24 23 24 20 MAXIMUM AIR TEMPERATURE (C) 7.7 10.6 9.5 15.5 25.6 29.6 31.9 32.1 29.6 23.3 12.3 9.7 19.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 17 25 24 18 0 0 0 85 DAYS WITH MAXIMUM TEMP. <= 0 0 0 2 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS HIGHEST(C) 13.0 18.0 17.0 23.0 30.0 36.0 37.0 36.0 34.0 28.0 23.0 14.0 37.0 DAY 16 19 30 25 28 26 28 9 13 5 1 29 DIF. BETWEEN (MAX.-MIN.) (C) 10.0 10.5 9.6 9.8 14.6 15.3 14.9 15.6 16.1 15.2 8.7 10.3 12.6 MEAN DAILY TEMP. (MDT) (C) 2.7 5.3 4.7 10.6 18.3 21.9 24.5 24.3 21.5 15.7 8.0 4.5 13.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 4.5 50.0 107.5 104.5 38.5 0.0 0.0 0.0 305.0 HEATING DEG. DAYS(BASE 18 0C) 474.0 368.0 412.0 223.0 31.5 1.5 0.0 0.0 0.5 78.0 300.5 417.0 2306.0 DEWPOINT (MEAN C) -3.3 -2.4 -2.6 2.7 6.6 7.4 10.7 9.9 7.7 4.1 2.7 -1.2 3.5 MIXING RATIO (G/KG) 3.54 3.82 3.76 5.52 7.28 7.70 9.65 9.11 7.83 5.99 5.49 4.07 6.15 VAPOUR PRESSURE (HPA) 4.89 5.27 5.18 7.59 10.00 10.53 13.14 12.41 10.74 8.28 7.59 5.66 8.44 SATURATION DEF. (HPA) 2.23 3.61 3.43 5.28 12.21 17.06 18.06 18.73 15.34 9.00 2.67 2.08 9.14 RELATIVE HUMIDITY (MEAN %) 72 63 65 64 49 42 46 44 45 53 77 76 58 RELATIVE HUMIDITY (MAX. %) 85 79 80 83 71 62 65 61 62 69 89 85 74 RELATIVE HUMIDITY (MIN. %) 54 44 47 42 30 25 29 28 27 31 60 57 40 RELATIVE HUMIDITY (MEAN% 03UTC) 81 73 76 79 67 59 65 59 59 66 83 83 71 RELATIVE HUMIDITY (MEAN% 09UTC) 59 51 52 53 37 35 34 34 33 34 63 60 45 RELATIVE HUMIDITY (MEAN% 15UTC) 71 61 59 49 37 29 35 34 39 56 79 79 52 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 30.1 36.6 56.9 76.1 12.1 0.2 1.0 1.0 0.0 6.5 95.9 0.6 317.0 DAYS WITH PRECIPITATION >=10 1 1 1 4 0 0 0 0 0 0 3 0 10 DAYS WITH PRECIPITATION >= 5 2 1 3 5 1 0 0 0 0 1 8 0 21 DAYS WITH PRECIPITATION >= 1 4 5 9 13 5 0 0 1 0 1 11 0 49 DAYS WITH PRECIPITATION 6 8 11 15 6 1 2 1 0 3 13 1 67 GREATEST DAILY PRECIPITATION 19.0 27.0 34.0 12.0 8.0 0.2 0.6 1.0 0.0 6.0 24.0 0.6 34.0 DAY 7 3 22 9 12 10 22 30 ** 10 18 19 DAY WITH THUNDER STORM 0 1 0 2 2 0 1 0 0 0 0 0 6 DAYS WITH SNOW OR SLEET 3 2 6 0 0 0 0 0 0 0 0 0 11 DAYS WITH DUST 0 0 0 0 0 2 1 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 180 180 180 180 180 180 135 135 135 180 180 135 180 PREVAILING WIND SPEED(KNOTS) 2.6 3.6 2.6 2.9 3.5 5.0 3.0 2.7 3.0 3.4 2.4 2.3 3.2 PREVAILING WIND PERCENT 40.5 48.5 46.2 36.4 28.3 20.1 15.8 18.2 18.8 10.1 11.7 8.5 22.8 CALMS PERCENT OF WIND 38.5 15.6 8.5 21.8 24.3 26.4 47.8 46.2 58.6 68.8 72.0 79.8 42.5 NO. OF WIND OBSERVATION 247 231 247 239 247 239 247 247 239 247 239 247 2916 VECTOR WIND DIRECTION (MEAN) 196 188 198 191 173 174 133 155 149 179 159 157 180 VECTOR WIND MAGNITUDE(KNOTS) 1.9 2.9 2.6 2.2 1.7 1.7 0.7 1.1 1.0 1.0 0.6 0.4 1.4 WIND STEADINESES (MEAN %) 82.6 76.3 72.2 71.0 54.8 58.6 36.8 61.1 76.9 71.4 85.7 80.0 63.6 WIND SPEED (MEAN KNOTS) 2.3 3.8 3.6 3.1 3.1 2.9 1.9 1.8 1.3 1.4 0.7 0.5 2.2 FASTEST WIND DIRECTION 210 200 250 230 230 180 210 210 210 230 130 210 200 FASTEST WIND SPEED (KNOTS) 23 37 18 24 24 24 15 9 15 18 5 13 37 DAY 22 2 1 4 15 3 6 8 25 5 1 1 DAYS WITH SKY CLEAR (0-2)/8 20 14 8 8 23 30 27 30 30 27 12 21 250 DAYS WITH P.CLOUDY (3-6)/8 8 14 16 9 7 0 4 1 0 4 9 7 79 DAYS WITH CLOUDY (7-8)/8 3 1 7 13 1 0 0 0 0 0 9 3 37 DAYS WITH VISIBILITY =< 2 KM 0 2 4 2 0 0 0 0 0 0 0 0 8 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 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 866.3 865.1 862.4 862.5 865.0 861.7 860.4 859.7 864.6 868.3 868.2 869.7 864.5 MAX. QFE PRESSURE IN HPA 873.0 877.5 870.7 874.1 871.2 868.7 869.8 866.5 868.7 876.5 874.2 874.8 877.5 DAY-HOUR 19- 6 17- 3 20- 6 7- 6 1- 6 7- 6 28-21 14- 0 20- 6 23-21 26- 6 7- 6 MIN. QFE PRESSURE IN HPA 853.8 851.5 853.3 853.7 856.8 852.9 853.2 853.3 859.4 861.6 855.8 858.3 851.5 DAY-HOUR 7-12 29-12 7-12 4-12 30-12 30-15 12-15 11-12 4-15 6-15 19-12 29-12 MEAN QNH PRESSURE IN HPA 1014.6 1013.3 1010.2 1010.3 1013.1 1009.4 1007.9 1007.1 1012.6 1016.9 1016.8 1018.5 1012.6 MAX. QNH PRESSURE IN HPA 1022.3 1027.4 1019.6 1023.5 1020.2 1017.4 1018.6 1014.9 1017.4 1026.2 1023.6 1024.3 1027.4 DAY-HOUR 19- 6 17- 3 20- 6 7- 6 1- 6 7- 6 28-21 14- 0 20- 6 23-21 26- 6 7- 6 MIN. QNH PRESSURE IN HPA 1000.4 997.8 999.8 1000.3 1003.8 999.4 999.7 999.8 1006.8 1009.3 1002.7 1005.5 997.8 DAY-HOUR 7-12 29-12 7-12 4-12 30-12 30-15 12-15 11-12 4-15 6-15 19-12 29-12 MEAN QFF PRESSURE IN HPA 1017.3 1014.3 1011.3 1007.9 1006.2 1000.6 997.8 997.1 1004.4 1012.2 1016.4 1020.5 1008.8 MAX. QFF PRESSURE IN HPA 1027.5 1029.9 1022.6 1021.6 1016.1 1011.3 1006.5 1005.7 1011.6 1022.2 1026.1 1027.1 1029.9 DAY-HOUR 28- 6 17- 3 13-18 7- 6 2- 3 7- 3 28-21 31- 3 20- 6 23-21 26- 6 8- 6 MIN. QFF PRESSURE IN HPA 1002.9 995.5 997.8 996.6 995.3 988.9 989.3 988.5 996.7 1002.6 1002.3 1004.5 988.5 DAY-HOUR 7-12 29-12 7-12 4-12 30-12 30-12 2-12 11-12 16-12 6-21 19-12 29-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 866.5 865.3 862.7 862.5 865.4 862.3 860.9 860.1 864.9 868.5 868.4 869.9 864.8 MAX. QFE PRESSURE IN HPA 872.0 872.0 870.5 871.7 870.3 867.8 865.9 866.5 867.6 872.6 873.4 874.4 874.4 DAY 19 14 20 7 2 7 29 14 21 28 26 7 MIN. QFE PRESSURE IN HPA 857.6 854.5 855.4 858.0 859.8 856.2 856.5 856.0 861.2 862.9 857.5 863.1 854.5 DAY 23 22 8 19 31 30 2 11 4 7 19 29 MEAN QNH PRESSURE IN HPA 1014.8 1013.5 1010.6 1010.3 1013.6 1010.0 1008.5 1007.6 1013.1 1017.1 1017.0 1018.8 1012.9 MAX. QNH PRESSURE IN HPA 1021.1 1021.1 1019.4 1020.8 1019.2 1016.3 1014.2 1014.9 1016.1 1021.8 1022.7 1023.8 1023.8 DAY 19 14 20 7 2 7 29 14 21 28 26 7 MIN. QNH PRESSURE IN HPA 1004.7 1001.2 1002.2 1005.2 1007.2 1003.2 1003.5 1002.9 1008.8 1010.8 1004.6 1011.0 1001.2 DAY 23 22 8 19 31 30 2 11 4 7 19 29 MEAN QFF PRESSURE IN HPA 1016.9 1013.9 1011.3 1007.7 1006.5 1001.1 998.1 997.2 1004.2 1011.9 1016.0 1020.1 1008.7 MAX. QFF PRESSURE IN HPA 1024.9 1023.9 1021.8 1018.3 1014.4 1009.7 1003.2 1004.8 1009.7 1017.5 1023.4 1024.9 1024.9 DAY 28 11 14 7 2 7 9 14 21 23 26 7 MIN. QFF PRESSURE IN HPA 1004.7 997.5 1000.9 1000.5 998.8 992.7 992.4 991.6 999.5 1004.6 1004.4 1011.9 991.6 DAY 23 22 8 26 31 30 1 12 4 6 19 29 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.4 865.7 862.4 862.7 865.6 862.7 861.4 860.7 865.3 868.7 868.4 869.9 865.0 MAX. QFE PRESSURE IN HPA 872.3 877.5 870.3 872.8 870.8 868.2 866.3 866.3 868.0 872.9 873.7 874.5 877.5 DAY 19 17 20 7 2 7 29 14 20 28 26 7 MIN. QFE PRESSURE IN HPA 855.8 854.8 854.6 858.0 860.4 856.6 856.9 856.4 861.4 863.7 856.8 861.0 854.6 DAY 7 22 2 19 16 30 2 11 4 7 19 29 MEAN QNH PRESSURE IN HPA 1014.7 1014.0 1010.2 1010.5 1013.8 1010.5 1009.0 1008.3 1013.5 1017.4 1017.0 1018.7 1013.1 MAX. QNH PRESSURE IN HPA 1021.5 1027.4 1019.2 1022.0 1019.7 1016.8 1014.6 1014.6 1016.6 1022.1 1023.0 1024.0 1027.4 DAY 19 17 20 7 2 7 29 14 20 28 26 7 MIN. QNH PRESSURE IN HPA 1002.7 1001.6 1001.3 1005.2 1007.9 1003.6 1003.9 1003.4 1009.1 1011.7 1003.8 1008.6 1001.3 DAY 7 22 2 19 16 30 2 11 4 7 19 29 MEAN QFF PRESSURE IN HPA 1018.2 1015.7 1011.9 1008.6 1007.8 1002.4 999.5 999.0 1006.3 1014.1 1017.2 1021.5 1010.2 MAX. QFF PRESSURE IN HPA 1026.4 1029.9 1022.4 1020.8 1016.1 1011.3 1004.5 1005.7 1011.1 1019.6 1025.7 1026.8 1029.9 DAY 28 17 20 7 2 7 9 31 30 28 26 7 MIN. QFF PRESSURE IN HPA 1005.2 999.3 1002.3 1001.9 1000.3 994.0 993.8 993.8 1000.9 1006.8 1003.9 1010.0 993.8 DAY 7 22 2 26 31 30 2 11 16 5 19 29 ======================================================================================================================= 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 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 867.0 866.1 863.1 863.2 866.0 862.8 861.5 861.0 865.9 869.4 869.1 870.6 865.5 MAX. QFE PRESSURE IN HPA 873.0 873.1 870.7 874.1 871.2 868.7 867.0 866.5 868.7 873.6 874.2 874.8 874.8 DAY 19 15 20 7 1 7 29 14 20 28 26 7 MIN. QFE PRESSURE IN HPA 855.5 855.3 855.0 857.5 860.0 856.0 856.5 856.6 862.0 863.7 856.7 860.7 855.0 DAY 7 29 2 1 31 30 2 11 4 6 19 29 MEAN QNH PRESSURE IN HPA 1015.4 1014.5 1010.9 1011.2 1014.3 1010.6 1009.2 1008.6 1014.2 1018.1 1017.8 1019.5 1013.7 MAX. QNH PRESSURE IN HPA 1022.3 1022.4 1019.6 1023.5 1020.2 1017.4 1015.4 1014.9 1017.4 1022.9 1023.6 1024.3 1024.3 DAY 19 15 20 7 1 7 29 14 20 28 26 7 MIN. QNH PRESSURE IN HPA 1002.4 1002.1 1001.8 1004.6 1007.5 1002.9 1003.5 1003.6 1009.7 1011.7 1003.7 1008.3 1001.8 DAY 7 29 2 1 31 30 2 11 4 6 19 29 MEAN QFF PRESSURE IN HPA 1018.9 1016.1 1012.3 1008.7 1007.3 1001.8 999.3 998.8 1006.2 1013.8 1017.8 1022.3 1010.3 MAX. QFF PRESSURE IN HPA 1027.5 1027.0 1021.6 1021.6 1015.6 1011.0 1003.9 1005.4 1011.6 1020.0 1026.1 1027.1 1027.5 DAY 28 11 20 7 1 7 30 14 20 30 26 8 MIN. QFF PRESSURE IN HPA 1004.8 1000.8 1002.8 1001.6 999.3 992.7 993.1 992.8 1001.1 1003.9 1003.4 1009.8 992.7 DAY 23 29 7 1 31 30 2 2 16 6 19 29 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 866.3 865.6 862.6 862.8 865.4 862.2 860.7 860.3 865.1 868.7 868.5 869.8 864.8 MAX. QFE PRESSURE IN HPA 872.4 873.1 869.4 874.0 871.0 867.9 866.6 865.6 868.2 872.8 873.5 874.3 874.3 DAY 19 14 19 7 5 7 29 14 20 28 26 6 MIN. QFE PRESSURE IN HPA 854.8 853.5 853.9 857.2 859.0 855.3 855.0 855.6 861.3 863.4 856.9 859.2 853.5 DAY 7 29 2 4 30 30 12 11 4 10 19 29 MEAN QNH PRESSURE IN HPA 1014.6 1013.8 1010.4 1010.6 1013.6 1009.9 1008.3 1007.9 1013.3 1017.3 1017.1 1018.6 1013.0 MAX. QNH PRESSURE IN HPA 1021.6 1022.4 1018.2 1023.4 1020.0 1016.5 1015.0 1013.8 1016.8 1022.0 1022.8 1023.7 1023.7 DAY 19 14 19 7 5 7 29 14 20 28 26 6 MIN. QNH PRESSURE IN HPA 1001.6 1000.1 1000.5 1004.3 1006.3 1002.1 1001.8 1002.5 1008.9 1011.3 1003.9 1006.6 1000.1 DAY 7 29 2 4 30 30 12 11 4 10 19 29 MEAN QFF PRESSURE IN HPA 1016.5 1014.1 1011.3 1008.1 1005.9 1000.8 998.0 997.5 1004.3 1011.7 1016.3 1019.9 1008.7 MAX. QFF PRESSURE IN HPA 1024.6 1025.0 1020.5 1020.6 1013.5 1010.1 1003.2 1004.3 1010.4 1016.9 1024.0 1024.7 1025.0 DAY 28 14 13 7 2 7 29 14 20 22 26 6 MIN. QFF PRESSURE IN HPA 1003.8 998.1 1001.2 1001.4 997.6 991.1 991.5 991.2 998.0 1003.2 1004.3 1006.2 991.1 DAY 7 29 2 19 30 30 2 11 16 6 19 29 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 865.4 864.1 861.5 861.8 864.1 860.6 859.4 858.7 863.6 867.4 867.4 868.9 863.6 MAX. QFE PRESSURE IN HPA 871.7 871.2 869.0 873.1 868.9 866.8 865.1 863.9 866.9 871.1 871.9 872.9 873.1 DAY 18 14 19 7 1 7 29 14 20 30 26 6 MIN. QFE PRESSURE IN HPA 853.8 851.5 853.3 853.7 856.8 853.3 853.4 853.3 859.8 863.3 855.8 858.3 851.5 DAY 7 29 7 4 30 20 12 11 4 4 19 29 MEAN QNH PRESSURE IN HPA 1013.6 1012.1 1009.2 1009.6 1012.1 1008.2 1006.8 1006.0 1011.5 1015.9 1015.9 1017.5 1011.5 MAX. QNH PRESSURE IN HPA 1020.8 1020.2 1017.7 1022.4 1017.6 1015.2 1013.3 1011.9 1015.3 1020.1 1021.0 1022.1 1022.4 DAY 18 14 19 7 1 7 29 14 20 30 26 6 MIN. QNH PRESSURE IN HPA 1000.4 997.8 999.8 1000.3 1003.8 999.8 1000.0 999.8 1007.2 1011.2 1002.7 1005.5 997.8 DAY 7 29 7 4 30 20 12 11 4 4 19 29 MEAN QFF PRESSURE IN HPA 1015.5 1012.3 1009.8 1006.8 1004.9 999.0 996.3 995.4 1002.6 1010.7 1014.8 1018.6 1007.2 MAX. QFF PRESSURE IN HPA 1023.3 1022.3 1020.7 1020.0 1012.6 1008.4 1001.2 1002.2 1008.4 1016.3 1021.9 1023.0 1023.3 DAY 27 14 13 7 1 7 29 30 20 22 26 7 MIN. QFF PRESSURE IN HPA 1002.9 995.5 997.8 996.6 995.3 988.9 989.3 988.5 996.7 1002.9 1002.3 1004.5 988.5 DAY 7 29 7 4 30 30 2 11 16 5 19 29 ======================================================================================================================= 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 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 866.0 864.4 861.9 861.8 864.0 860.2 858.7 858.2 863.2 867.3 867.8 869.3 863.6 MAX. QFE PRESSURE IN HPA 872.4 871.8 870.1 872.3 868.8 865.7 864.0 863.4 866.6 871.1 872.3 873.5 873.5 DAY 18 15 19 7 1 7 29 31 20 30 26 6 MIN. QFE PRESSURE IN HPA 855.5 853.5 854.6 853.8 857.7 852.9 853.2 853.4 859.4 861.6 856.1 861.3 852.9 DAY 7 29 2 4 30 30 12 11 4 6 19 29 MEAN QNH PRESSURE IN HPA 1014.3 1012.5 1009.6 1009.5 1012.0 1007.8 1006.0 1005.4 1011.2 1015.7 1016.3 1018.1 1011.5 MAX. QNH PRESSURE IN HPA 1021.6 1020.9 1019.0 1021.5 1017.5 1014.0 1012.0 1011.3 1015.0 1020.1 1021.5 1022.8 1022.8 DAY 18 15 19 7 1 7 29 31 20 30 26 6 MIN. QNH PRESSURE IN HPA 1002.4 1000.1 1001.3 1000.4 1004.9 999.4 999.7 1000.0 1006.8 1009.3 1003.0 1008.9 999.4 DAY 7 29 2 4 30 30 12 11 4 6 19 29 MEAN QFF PRESSURE IN HPA 1017.7 1014.0 1011.1 1007.6 1005.9 999.5 996.3 996.1 1003.8 1012.3 1016.5 1020.7 1008.5 MAX. QFF PRESSURE IN HPA 1026.2 1025.0 1021.7 1020.3 1013.7 1007.8 1001.3 1003.9 1009.5 1017.9 1023.9 1025.2 1026.2 DAY 28 10 13 7 1 6 29 31 20 22 25 6 MIN. QFF PRESSURE IN HPA 1005.4 999.9 1002.5 997.0 997.8 989.4 990.5 990.3 998.6 1003.8 1003.1 1010.2 989.4 DAY 7 29 2 26 30 30 19 11 4 6 19 29 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 866.4 864.8 862.4 862.5 864.6 861.2 859.8 859.0 864.0 867.9 868.1 869.6 864.2 MAX. QFE PRESSURE IN HPA 872.3 872.4 870.3 872.2 869.1 866.2 864.2 864.0 866.9 871.8 872.4 873.8 873.8 DAY 18 15 19 7 1 7 29 31 30 30 25 6 MIN. QFE PRESSURE IN HPA 856.5 855.1 854.6 856.0 858.4 854.1 853.5 854.6 860.5 861.8 857.4 862.3 853.5 DAY 7 29 1 4 30 30 12 11 3 6 19 29 MEAN QNH PRESSURE IN HPA 1014.7 1012.9 1010.2 1010.4 1012.7 1008.8 1007.3 1006.4 1012.1 1016.4 1016.7 1018.4 1012.2 MAX. QNH PRESSURE IN HPA 1021.5 1021.6 1019.2 1021.3 1017.8 1014.5 1012.2 1012.0 1015.3 1020.9 1021.6 1023.2 1023.2 DAY 18 15 19 7 1 7 29 31 30 30 25 6 MIN. QNH PRESSURE IN HPA 1003.5 1001.9 1001.3 1002.9 1005.7 1000.8 1000.1 1001.3 1008.0 1009.5 1004.5 1010.1 1000.1 DAY 7 29 1 4 30 30 12 11 3 6 19 29 MEAN QFF PRESSURE IN HPA 1018.2 1014.5 1011.5 1007.9 1005.6 1000.0 997.4 996.7 1004.1 1012.1 1016.7 1021.1 1008.8 MAX. QFF PRESSURE IN HPA 1026.4 1025.7 1022.6 1019.4 1013.9 1008.2 1002.8 1004.2 1009.6 1018.1 1024.3 1025.9 1026.4 DAY 28 10 13 7 18 6 8 31 20 30 25 9 MIN. QFF PRESSURE IN HPA 1006.8 999.7 1002.6 999.8 997.7 990.4 990.0 989.8 999.6 1002.6 1004.5 1012.0 989.8 DAY 7 21 1 26 30 30 12 1 3 6 18 29 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 866.4 865.2 862.6 862.5 865.0 861.9 860.6 859.5 864.4 868.4 868.2 869.8 864.6 MAX. QFE PRESSURE IN HPA 872.3 872.2 870.2 872.0 869.5 866.9 869.8 865.0 867.5 876.5 872.8 874.2 876.5 DAY 18 15 19 7 1 6 28 13 5 23 25 6 MIN. QFE PRESSURE IN HPA 858.0 855.0 855.3 858.2 858.9 855.6 855.3 855.1 860.5 862.2 857.8 863.1 855.0 DAY 7 21 1 26 30 29 12 11 3 6 18 29 MEAN QNH PRESSURE IN HPA 1014.7 1013.4 1010.4 1010.4 1013.2 1009.7 1008.2 1006.9 1012.5 1017.1 1016.8 1018.6 1012.7 MAX. QNH PRESSURE IN HPA 1021.5 1021.3 1019.1 1021.1 1018.3 1015.3 1018.6 1013.2 1016.0 1026.2 1022.0 1023.6 1026.2 DAY 18 15 19 7 1 6 28 13 5 23 25 6 MIN. QNH PRESSURE IN HPA 1005.2 1001.8 1002.1 1005.4 1006.2 1002.5 1002.1 1001.9 1008.0 1010.0 1005.0 1011.0 1001.8 DAY 7 21 1 26 30 29 12 11 3 6 18 29 MEAN QFF PRESSURE IN HPA 1016.8 1013.9 1011.2 1007.7 1005.9 1000.7 997.8 996.5 1003.6 1011.4 1015.8 1019.8 1008.4 MAX. QFF PRESSURE IN HPA 1024.6 1024.1 1021.5 1018.4 1013.8 1008.6 1006.5 1003.5 1009.6 1022.2 1022.8 1024.9 1024.9 DAY 27 10 13 7 18 6 28 13 20 23 25 6 MIN. QFF PRESSURE IN HPA 1005.6 998.5 1002.0 1001.4 997.4 992.2 991.3 990.6 998.6 1002.6 1004.7 1011.1 990.6 DAY 22 21 7 25 30 29 12 11 3 6 18 29 ======================================================================================================================= 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 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.6 0.2 3.4 10.6 17.5 22.5 25.2 24.2 18.6 12.9 6.9 3.6 12.0 MINIMUN AIR TEMPERATURE (C) -4.3 -3.4 -1.2 5.7 10.7 15.3 18.1 17.2 11.5 7.0 2.7 -0.2 6.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 0 0 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 16 17 11 0 0 0 0 0 0 0 1 1 46 DAYS WITH FREEZING MIN.<= 0 29 27 20 2 0 0 0 0 0 0 8 22 108 TEMPERATURE RECORDS LOWEST(C) -8.0 -8.0 -8.0 0.0 5.0 10.0 15.0 14.0 8.0 3.0 -5.0 -4.0 -8.0 DAY 10 1 3 3 1 2 16 31 30 26 24 27 MAXIMUM AIR TEMPERATURE (C) 2.9 5.6 9.7 17.0 25.0 30.3 33.5 32.5 27.4 21.6 13.8 10.3 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 18 31 27 4 0 0 0 81 DAYS WITH MAXIMUM TEMP. <= 0 10 0 0 0 0 0 0 0 0 0 0 0 10 TEMPERATURE RECORDS HIGHEST(C) 11.0 11.0 18.0 25.0 30.0 36.0 37.0 36.0 32.0 26.0 19.0 14.0 37.0 DAY 20 6 23 26 23 25 25 17 1 14 16 3 DIF. BETWEEN (MAX.-MIN.) (C) 7.2 9.0 10.9 11.3 14.3 15.0 15.4 15.3 15.9 14.6 11.1 10.5 12.5 MEAN DAILY TEMP. (MDT) (C) -0.7 1.1 4.3 11.3 17.9 22.8 25.8 24.8 19.5 14.3 8.3 5.0 12.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.5 71.5 148.0 118.5 5.5 0.0 0.0 0.0 345.0 HEATING DEG. DAYS(BASE 18 0C) 579.5 473.0 425.5 200.0 37.0 0.0 0.0 0.0 4.0 114.5 292.0 402.0 2527.5 DEWPOINT (MEAN C) -4.9 -3.8 -3.4 2.5 6.6 9.5 11.9 10.3 8.3 3.6 0.9 -1.1 3.4 MIXING RATIO (G/KG) 3.16 3.40 3.54 5.52 7.20 8.88 10.42 9.35 8.13 5.81 4.90 4.16 6.21 VAPOUR PRESSURE (HPA) 4.38 4.70 4.88 7.59 9.87 12.13 14.13 12.75 11.12 8.02 6.78 5.75 8.51 SATURATION DEF. (HPA) 1.26 1.65 3.47 5.82 11.30 16.73 19.34 18.74 11.45 7.71 3.70 2.40 8.63 RELATIVE HUMIDITY (MEAN %) 79 76 63 60 52 47 46 44 53 56 68 73 60 RELATIVE HUMIDITY (MAX. %) 88 87 78 79 69 65 65 59 71 75 82 86 75 RELATIVE HUMIDITY (MIN. %) 67 60 45 40 34 29 29 28 36 34 49 54 42 RELATIVE HUMIDITY (MEAN% 03UTC) 82 84 76 73 66 64 61 58 70 73 79 83 72 RELATIVE HUMIDITY (MEAN% 09UTC) 73 66 51 49 40 34 35 33 41 37 53 60 48 RELATIVE HUMIDITY (MEAN% 15UTC) 78 73 55 50 44 36 37 37 45 54 69 72 54 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 43.1 54.3 15.0 68.3 14.1 10.6 0.0 0.0 0.0 0.0 40.4 15.9 261.7 DAYS WITH PRECIPITATION >=10 2 2 0 2 1 0 0 0 0 0 1 0 8 DAYS WITH PRECIPITATION >= 5 3 2 1 7 1 0 0 0 0 0 1 1 16 DAYS WITH PRECIPITATION >= 1 5 8 4 10 2 4 0 0 0 0 7 4 44 DAYS WITH PRECIPITATION 6 10 8 11 4 5 0 0 0 0 7 4 55 GREATEST DAILY PRECIPITATION 21.0 21.0 7.1 14.0 10.0 4.0 0.0 0.0 0.0 0.0 27.0 7.0 27.0 DAY 3 8 8 29 7 15 ** ** ** ** 22 8 DAY WITH THUNDER STORM 0 0 0 7 3 3 0 0 0 0 0 0 13 DAYS WITH SNOW OR SLEET 7 9 3 1 0 0 0 0 0 0 0 0 20 DAYS WITH DUST 1 0 0 1 2 3 0 1 0 2 0 0 10 WIND DIRECTION (PREVAILING) 180 180 180 180 180 180 90 90 135 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 3.1 3.1 3.6 3.4 3.7 3.6 3.6 4.0 3.5 3.9 4.1 3.0 3.5 PREVAILING WIND PERCENT 32.7 22.3 39.1 37.9 37.1 17.9 14.1 18.6 26.8 22.2 34.3 34.4 26.9 CALMS PERCENT OF WIND 35.1 64.3 24.6 7.1 13.7 31.3 42.3 41.7 35.1 44.8 33.9 48.6 35.0 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 247 239 248 239 247 2916 VECTOR WIND DIRECTION (MEAN) 187 170 178 155 161 185 133 138 157 149 184 159 166 VECTOR WIND MAGNITUDE(KNOTS) 2.2 0.9 2.3 2.5 2.3 1.9 1.1 1.3 1.8 1.4 2.6 1.5 1.7 WIND STEADINESES (MEAN %) 81.5 90.0 82.1 73.5 76.7 61.3 55.0 59.1 69.2 77.8 83.9 93.8 70.8 WIND SPEED (MEAN KNOTS) 2.7 1.0 2.8 3.4 3.0 3.1 2.0 2.2 2.6 1.8 3.1 1.6 2.4 FASTEST WIND DIRECTION 210 180 130 180 210 230 160 210 230 160 220 130 210 FASTEST WIND SPEED (KNOTS) 25 10 18 18 23 24 20 18 23 24 24 18 25 DAY 21 25 31 12 27 10 29 25 21 16 1 22 DAYS WITH SKY CLEAR (0-2)/8 12 10 15 7 23 26 31 30 29 26 17 15 241 DAYS WITH P.CLOUDY (3-6)/8 7 5 11 16 6 3 0 1 1 5 8 10 73 DAYS WITH CLOUDY (7-8)/8 12 13 5 7 2 1 0 0 0 0 5 6 51 DAYS WITH VISIBILITY =< 2 KM 1 4 0 1 0 0 0 0 0 0 0 0 6 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 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 866.7 865.0 863.2 863.7 863.1 861.5 858.6 861.5 861.9 867.6 866.9 865.2 863.7 MAX. QFE PRESSURE IN HPA 874.9 875.4 876.1 871.2 872.1 867.7 864.8 867.7 868.6 875.6 873.6 875.0 876.1 DAY-HOUR 8- 6 22- 6 4- 6 17- 6 14- 6 21- 6 24- 6 9- 6 7- 6 25- 6 29- 6 3- 9 MIN. QFE PRESSURE IN HPA 854.2 859.1 853.8 855.3 854.9 855.1 852.7 856.1 855.0 861.4 850.1 849.2 849.2 DAY-HOUR 20-12 2-12 16-15 13-12 29-12 30-15 11-12 6-15 11-18 5-15 22- 6 22-12 MEAN QNH PRESSURE IN HPA 1015.1 1013.1 1011.1 1011.7 1011.0 1009.2 1005.9 1009.2 1009.7 1016.1 1015.3 1013.4 1011.7 MAX. QNH PRESSURE IN HPA 1024.4 1025.0 1025.8 1020.2 1021.2 1016.2 1012.9 1016.2 1017.2 1025.2 1022.9 1024.5 1025.8 DAY-HOUR 8- 6 22- 6 4- 6 17- 6 14- 6 21- 6 24- 6 9- 6 7- 6 25- 6 29- 6 3- 9 MIN. QNH PRESSURE IN HPA 1000.9 1006.4 1000.4 1002.1 1001.7 1001.9 999.2 1003.0 1001.8 1009.1 996.2 995.2 995.2 DAY-HOUR 20-12 2-12 16-15 13-12 29-12 30-15 11-12 6-15 11-18 5-15 22- 6 22-12 MEAN QFF PRESSURE IN HPA 1019.7 1016.6 1012.6 1009.0 1004.5 1000.0 995.1 999.1 1002.5 1012.3 1014.8 1014.7 1008.4 MAX. QFF PRESSURE IN HPA 1032.5 1029.9 1032.4 1020.5 1016.3 1006.2 1003.3 1007.7 1010.8 1024.1 1026.8 1026.5 1032.5 DAY-HOUR 10- 6 22- 3 4- 3 17- 6 1- 3 21- 6 16- 3 9- 6 7- 3 25- 3 29- 6 6- 6 MIN. QFF PRESSURE IN HPA 1000.0 1008.9 999.8 998.4 994.0 990.5 987.9 991.5 991.8 1000.8 994.3 994.7 987.9 DAY-HOUR 20-12 8- 0 30-21 13-12 27- 9 25-12 11-12 6-12 1-12 15-12 22- 6 22-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 866.7 865.1 863.4 863.8 863.4 861.7 859.0 861.8 862.3 867.7 866.9 865.5 863.9 MAX. QFE PRESSURE IN HPA 874.8 874.7 875.9 869.4 870.1 866.3 863.6 866.0 867.5 874.7 872.3 874.1 875.9 DAY 8 22 4 17 14 21 16 9 7 25 29 3 MIN. QFE PRESSURE IN HPA 855.3 860.9 856.4 856.4 857.3 855.5 854.6 859.1 857.2 863.3 852.4 851.4 851.4 DAY 21 8 26 13 27 14 11 6 1 3 22 23 MEAN QNH PRESSURE IN HPA 1015.1 1013.2 1011.3 1011.8 1011.3 1009.4 1006.3 1009.6 1010.1 1016.2 1015.3 1013.7 1011.9 MAX. QNH PRESSURE IN HPA 1024.3 1024.2 1025.5 1018.2 1019.0 1014.6 1011.6 1014.3 1016.0 1024.2 1021.5 1023.5 1025.5 DAY 8 22 4 17 14 21 16 9 7 25 29 3 MIN. QNH PRESSURE IN HPA 1002.1 1008.5 1003.4 1003.4 1004.4 1002.4 1001.3 1006.4 1004.3 1011.2 998.8 997.7 997.7 DAY 21 8 26 13 27 14 11 6 1 3 22 23 MEAN QFF PRESSURE IN HPA 1019.2 1016.3 1012.5 1008.7 1004.7 1000.0 995.1 998.9 1002.1 1011.5 1014.1 1014.3 1008.1 MAX. QFF PRESSURE IN HPA 1031.2 1027.7 1031.9 1018.9 1015.1 1004.6 1001.8 1004.9 1008.6 1022.1 1023.2 1023.1 1031.9 DAY 10 22 4 17 1 17 16 9 7 25 29 3 MIN. QFF PRESSURE IN HPA 1001.4 1008.9 1001.5 998.6 995.3 992.1 990.7 994.7 992.6 1003.7 997.2 996.7 990.7 DAY 21 8 31 13 27 14 11 6 1 15 22 23 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.7 865.2 863.7 864.1 863.6 862.1 859.7 862.4 862.7 868.1 867.1 865.5 864.2 MAX. QFE PRESSURE IN HPA 874.6 875.0 875.6 870.0 870.9 867.2 864.4 867.1 868.3 875.0 873.3 874.4 875.6 DAY 8 22 4 17 14 21 24 9 7 25 29 3 MIN. QFE PRESSURE IN HPA 854.7 860.2 856.6 855.8 856.8 856.5 854.7 859.4 857.3 863.6 851.6 852.4 851.6 DAY 20 8 31 13 27 14 11 6 21 3 22 22 MEAN QNH PRESSURE IN HPA 1015.0 1013.4 1011.6 1012.1 1011.6 1009.9 1007.1 1010.2 1010.5 1016.7 1015.5 1013.8 1012.3 MAX. QNH PRESSURE IN HPA 1024.1 1024.5 1025.2 1018.8 1019.9 1015.7 1012.5 1015.5 1016.9 1024.5 1022.6 1023.8 1025.2 DAY 8 22 4 17 14 21 24 9 7 25 29 3 MIN. QNH PRESSURE IN HPA 1001.4 1007.7 1003.6 1002.7 1003.8 1003.5 1001.4 1006.8 1004.4 1011.6 997.9 998.8 997.9 DAY 20 8 31 13 27 14 11 6 21 3 22 22 MEAN QFF PRESSURE IN HPA 1020.1 1017.6 1014.1 1010.2 1005.9 1001.3 996.9 1000.9 1004.2 1014.1 1016.0 1015.8 1009.8 MAX. QFF PRESSURE IN HPA 1031.9 1029.9 1032.4 1020.3 1016.3 1006.1 1003.3 1007.5 1010.8 1024.1 1026.8 1025.4 1032.4 DAY 10 22 4 17 1 21 16 9 7 25 29 3 MIN. QFF PRESSURE IN HPA 1001.9 1008.9 1002.3 998.9 994.5 994.3 991.6 996.3 994.5 1007.0 996.5 999.7 991.6 DAY 21 8 31 13 27 14 11 6 1 15 22 22 ======================================================================================================================= 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 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 867.3 865.7 864.2 864.6 864.3 862.6 860.1 863.0 863.2 869.0 867.8 866.1 864.8 MAX. QFE PRESSURE IN HPA 874.9 875.4 876.1 871.2 872.1 867.7 864.8 867.7 868.6 875.6 873.6 874.6 876.1 DAY 8 22 4 17 14 21 24 9 7 25 29 3 MIN. QFE PRESSURE IN HPA 855.8 861.1 857.3 855.7 856.2 856.7 854.4 859.8 857.6 863.7 850.1 852.1 850.1 DAY 20 8 13 13 27 14 11 6 21 21 22 22 MEAN QNH PRESSURE IN HPA 1015.7 1013.9 1012.3 1012.7 1012.3 1010.4 1007.5 1010.9 1011.1 1017.7 1016.3 1014.4 1013.0 MAX. QNH PRESSURE IN HPA 1024.4 1025.0 1025.8 1020.2 1021.2 1016.2 1012.9 1016.2 1017.2 1025.2 1022.9 1024.1 1025.8 DAY 8 22 4 17 14 21 24 9 7 25 29 3 MIN. QNH PRESSURE IN HPA 1002.7 1008.7 1004.4 1002.6 1003.2 1003.7 1001.1 1007.2 1004.7 1011.7 996.2 998.5 996.2 DAY 20 8 13 13 27 14 11 6 21 21 22 22 MEAN QFF PRESSURE IN HPA 1020.9 1017.7 1014.0 1010.2 1005.8 1001.3 997.0 1001.1 1004.1 1014.3 1016.4 1016.6 1009.9 MAX. QFF PRESSURE IN HPA 1032.5 1029.2 1031.8 1020.5 1015.2 1006.2 1002.6 1007.7 1010.8 1024.0 1026.8 1026.5 1032.5 DAY 10 22 4 17 1 21 16 9 7 25 29 6 MIN. QFF PRESSURE IN HPA 1003.6 1009.7 1002.5 999.0 994.2 994.5 990.7 996.3 995.3 1005.8 994.3 999.3 990.7 DAY 20 8 30 13 27 14 11 6 1 15 22 22 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 867.0 865.5 863.7 864.3 863.8 862.0 859.3 862.3 862.6 868.3 867.3 865.7 864.3 MAX. QFE PRESSURE IN HPA 874.6 875.0 875.8 871.1 871.4 866.9 864.6 866.7 868.3 874.7 872.7 875.0 875.8 DAY 8 22 3 17 14 20 24 9 7 24 29 3 MIN. QFE PRESSURE IN HPA 855.6 860.2 857.2 855.5 856.3 856.5 853.5 858.5 856.4 862.9 850.3 850.1 850.1 DAY 20 2 31 13 27 14 11 6 21 21 22 22 MEAN QNH PRESSURE IN HPA 1015.5 1013.7 1011.6 1012.4 1011.8 1009.8 1006.7 1010.1 1010.4 1016.9 1015.8 1013.9 1012.4 MAX. QNH PRESSURE IN HPA 1024.1 1024.5 1025.4 1020.1 1020.4 1015.3 1012.7 1015.1 1016.9 1024.2 1021.9 1024.5 1025.4 DAY 8 22 3 17 14 20 24 9 7 24 29 3 MIN. QNH PRESSURE IN HPA 1002.5 1007.7 1004.3 1002.4 1003.3 1003.5 1000.1 1005.8 1003.4 1010.8 996.4 996.2 996.2 DAY 20 2 31 13 27 14 11 6 21 21 22 22 MEAN QFF PRESSURE IN HPA 1019.6 1016.8 1012.6 1009.2 1004.8 1000.2 995.7 999.6 1002.8 1012.4 1014.4 1014.4 1008.5 MAX. QFF PRESSURE IN HPA 1031.0 1027.9 1030.3 1019.7 1013.4 1005.0 1001.3 1005.8 1009.7 1021.2 1024.0 1024.1 1031.0 DAY 10 22 3 17 1 20 16 9 7 24 25 3 MIN. QFF PRESSURE IN HPA 1001.5 1010.7 1000.9 998.5 994.0 991.2 988.9 994.1 994.6 1004.3 995.1 996.6 988.9 DAY 20 8 30 13 27 25 11 6 21 15 22 22 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 866.1 864.4 862.4 862.9 862.4 860.9 857.9 860.8 861.0 866.9 866.2 864.4 863.0 MAX. QFE PRESSURE IN HPA 873.6 873.2 875.4 869.3 869.9 865.5 862.6 865.2 865.8 873.7 871.1 872.8 875.4 DAY 8 21 3 17 14 20 24 9 7 24 29 3 MIN. QFE PRESSURE IN HPA 854.2 859.1 854.3 855.3 854.9 856.0 852.7 856.3 855.5 861.6 851.5 849.2 849.2 DAY 20 2 16 13 29 13 11 6 21 15 22 22 MEAN QNH PRESSURE IN HPA 1014.4 1012.5 1010.2 1010.8 1010.1 1008.5 1005.0 1008.4 1008.6 1015.3 1014.5 1012.5 1010.9 MAX. QNH PRESSURE IN HPA 1022.9 1022.5 1025.0 1018.0 1018.7 1013.7 1010.4 1013.4 1014.1 1023.0 1020.1 1022.0 1025.0 DAY 8 21 3 17 14 20 24 9 7 24 29 3 MIN. QNH PRESSURE IN HPA 1000.9 1006.4 1001.0 1002.1 1001.7 1002.9 999.2 1003.3 1002.4 1009.3 997.8 995.2 995.2 DAY 20 2 16 13 29 13 11 6 21 15 22 22 MEAN QFF PRESSURE IN HPA 1018.4 1015.4 1011.3 1007.6 1003.3 999.0 993.6 997.5 1000.6 1010.5 1013.3 1013.0 1007.0 MAX. QFF PRESSURE IN HPA 1029.8 1026.0 1030.7 1017.5 1012.4 1003.4 998.5 1003.7 1006.5 1020.0 1021.8 1022.6 1030.7 DAY 9 21 3 17 1 20 16 9 7 24 29 6 MIN. QFF PRESSURE IN HPA 1000.0 1010.0 1000.9 998.4 994.4 990.5 987.9 991.5 991.8 1000.8 997.3 994.7 987.9 DAY 20 25 30 13 27 25 11 6 1 15 22 22 ======================================================================================================================= 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 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 866.5 864.4 862.3 862.5 861.9 860.4 857.1 860.0 860.8 866.6 866.5 864.4 862.8 MAX. QFE PRESSURE IN HPA 873.6 874.1 875.6 868.5 868.9 865.3 861.4 864.0 865.3 873.2 871.4 872.6 875.6 DAY 7 21 3 17 14 20 24 9 7 24 29 3 MIN. QFE PRESSURE IN HPA 855.3 860.0 853.8 855.9 856.1 855.1 852.8 856.1 855.2 861.4 854.3 849.4 849.4 DAY 20 2 16 13 27 30 11 6 11 5 22 22 MEAN QNH PRESSURE IN HPA 1014.8 1012.5 1010.1 1010.4 1009.7 1007.9 1004.1 1007.4 1008.3 1015.0 1014.8 1012.5 1010.6 MAX. QNH PRESSURE IN HPA 1022.9 1023.5 1025.2 1017.1 1017.6 1013.5 1009.1 1012.0 1013.5 1022.5 1020.4 1021.8 1025.2 DAY 7 21 3 17 14 20 24 9 7 24 29 3 MIN. QNH PRESSURE IN HPA 1002.1 1007.5 1000.4 1002.8 1003.0 1001.9 999.3 1003.0 1002.0 1009.1 1001.0 995.4 995.4 DAY 20 2 16 13 27 30 11 6 11 5 22 22 MEAN QFF PRESSURE IN HPA 1019.8 1016.5 1012.4 1008.4 1003.8 999.1 993.7 997.9 1002.0 1012.3 1015.2 1014.5 1008.0 MAX. QFF PRESSURE IN HPA 1030.5 1028.8 1032.3 1017.4 1012.3 1003.9 998.8 1003.6 1007.3 1021.3 1024.3 1023.4 1032.3 DAY 10 21 3 17 1 10 15 9 7 24 29 3 MIN. QFF PRESSURE IN HPA 1002.7 1010.3 1000.3 999.8 994.3 991.0 989.3 992.5 993.8 1004.7 1000.2 996.2 989.3 DAY 20 8 25 13 27 30 11 6 1 3 21 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 866.7 864.6 862.8 863.6 862.6 860.9 857.7 860.5 861.3 867.1 866.6 865.0 863.3 MAX. QFE PRESSURE IN HPA 874.2 874.1 875.7 869.0 868.9 865.8 862.0 864.3 865.6 873.4 871.5 873.5 875.7 DAY 9 21 3 17 14 20 15 9 6 24 29 2 MIN. QFE PRESSURE IN HPA 855.8 860.3 855.0 857.5 857.1 855.2 854.0 856.5 855.0 862.6 854.6 849.9 849.9 DAY 20 2 16 13 29 13 11 31 11 3 21 22 MEAN QNH PRESSURE IN HPA 1015.1 1012.7 1010.7 1011.5 1010.4 1008.5 1004.8 1008.1 1008.9 1015.5 1015.0 1013.1 1011.2 MAX. QNH PRESSURE IN HPA 1023.6 1023.5 1025.3 1017.7 1017.6 1014.1 1009.7 1012.4 1013.8 1022.7 1020.5 1022.8 1025.3 DAY 9 21 3 17 14 20 15 9 6 24 29 2 MIN. QNH PRESSURE IN HPA 1002.7 1007.8 1001.8 1004.6 1004.2 1002.0 1000.6 1003.5 1001.8 1010.4 1001.3 996.0 996.0 DAY 20 2 16 13 29 13 11 31 11 3 21 22 MEAN QFF PRESSURE IN HPA 1020.3 1016.5 1012.4 1008.9 1003.8 999.5 994.4 998.3 1002.1 1012.1 1015.2 1015.3 1008.2 MAX. QFF PRESSURE IN HPA 1031.4 1027.9 1031.6 1018.9 1011.7 1004.4 1000.6 1003.9 1007.3 1021.5 1024.2 1024.7 1031.6 DAY 9 21 3 16 1 16 15 9 7 24 29 1 MIN. QFF PRESSURE IN HPA 1004.0 1010.6 1000.2 1002.1 996.4 991.2 990.4 993.4 993.2 1005.2 999.4 996.4 990.4 DAY 20 8 30 13 27 30 11 5 11 3 21 22 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 866.7 864.8 863.1 864.1 863.1 861.4 858.4 861.3 861.8 867.5 866.6 865.2 863.7 MAX. QFE PRESSURE IN HPA 874.3 874.3 875.7 869.3 869.6 866.0 862.6 865.2 866.6 874.1 871.7 873.8 875.7 DAY 7 21 3 17 13 20 15 8 6 24 28 2 MIN. QFE PRESSURE IN HPA 856.1 860.6 856.0 857.3 857.9 855.2 854.8 858.4 855.6 862.8 853.0 851.1 851.1 DAY 20 13 16 12 27 13 10 5 11 2 21 22 MEAN QNH PRESSURE IN HPA 1015.1 1013.0 1010.9 1012.1 1010.9 1009.0 1005.7 1009.0 1009.6 1016.0 1015.0 1013.4 1011.6 MAX. QNH PRESSURE IN HPA 1023.7 1023.7 1025.3 1018.0 1018.4 1014.3 1010.4 1013.4 1015.0 1023.5 1020.8 1023.2 1025.3 DAY 7 21 3 17 13 20 15 8 6 24 28 2 MIN. QNH PRESSURE IN HPA 1003.0 1008.2 1002.9 1004.4 1005.1 1002.0 1001.6 1005.7 1002.5 1010.7 999.5 997.3 997.3 DAY 20 13 16 12 27 13 10 5 11 2 21 22 MEAN QFF PRESSURE IN HPA 1019.3 1016.0 1011.8 1009.0 1004.0 999.4 994.7 998.5 1001.8 1011.4 1013.7 1014.1 1007.8 MAX. QFF PRESSURE IN HPA 1031.0 1027.1 1031.0 1019.0 1011.0 1004.5 1000.9 1004.4 1007.7 1020.7 1022.8 1022.7 1031.0 DAY 9 21 3 16 13 16 15 8 6 24 28 2 MIN. QFF PRESSURE IN HPA 1002.3 1010.4 999.8 1000.0 996.5 991.5 991.4 994.1 992.9 1004.4 997.7 996.7 991.4 DAY 20 17 30 12 26 13 11 5 11 2 21 22 ======================================================================================================================= 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 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.1 0.0 9.1 10.7 17.7 20.9 26.0 24.1 20.0 13.7 7.6 3.7 12.5 MINIMUN AIR TEMPERATURE (C) -5.8 -3.8 3.5 6.0 10.2 13.3 18.1 17.0 12.1 7.6 2.9 -0.6 6.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 23 18 0 0 0 0 0 0 0 0 0 0 41 DAYS WITH FREEZING MIN.<= 0 30 26 5 0 0 0 0 0 0 0 7 25 93 TEMPERATURE RECORDS LOWEST(C) -12.0 -9.0 -2.0 2.0 5.0 7.0 15.0 14.0 9.0 3.0 -3.0 -3.0 -12.0 DAY 6 8 12 6 1 10 5 5 19 12 29 1 MAXIMUM AIR TEMPERATURE (C) 0.9 5.4 16.2 17.2 25.3 28.6 34.1 32.8 28.7 21.2 14.2 9.1 19.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 13 30 29 12 1 0 0 87 DAYS WITH MAXIMUM TEMP. <= 0 14 2 0 0 0 0 0 0 0 0 0 0 16 TEMPERATURE RECORDS HIGHEST(C) 10.0 12.0 26.0 25.0 30.0 32.0 37.0 35.0 35.0 30.0 21.0 14.0 37.0 DAY 1 16 24 9 17 13 22 1 2 1 2 20 DIF. BETWEEN (MAX.-MIN.) (C) 6.7 9.2 12.7 11.2 15.1 15.3 16.0 15.8 16.6 13.6 11.3 9.7 12.8 MEAN DAILY TEMP. (MDT) (C) -2.5 0.8 9.8 11.6 17.7 20.9 26.1 24.9 20.4 14.4 8.5 4.2 13.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.5 30.0 157.0 122.0 22.0 0.0 0.0 0.0 331.5 HEATING DEG. DAYS(BASE 18 0C) 635.0 481.5 253.5 191.5 34.0 6.0 0.0 0.0 4.0 118.0 277.0 427.0 2427.5 DEWPOINT (MEAN C) -6.0 -4.4 -1.0 2.8 6.3 8.6 11.9 9.7 6.9 5.4 2.6 -1.5 3.4 MIXING RATIO (G/KG) 2.89 3.26 4.17 5.53 7.12 8.32 10.36 8.99 7.40 6.59 5.50 4.01 6.18 VAPOUR PRESSURE (HPA) 4.01 4.50 5.75 7.60 9.77 11.38 14.10 12.30 10.16 9.11 7.55 5.54 8.48 SATURATION DEF. (HPA) 1.03 1.83 6.37 5.80 11.53 14.73 20.99 19.26 14.73 7.47 3.31 2.64 9.14 RELATIVE HUMIDITY (MEAN %) 82 73 52 62 50 48 44 43 46 61 72 71 59 RELATIVE HUMIDITY (MAX. %) 89 85 69 80 72 68 63 61 63 77 86 85 75 RELATIVE HUMIDITY (MIN. %) 71 60 34 43 30 30 28 25 27 42 51 54 41 RELATIVE HUMIDITY (MEAN% 03UTC) 85 79 68 77 69 65 62 58 60 73 82 77 71 RELATIVE HUMIDITY (MEAN% 09UTC) 78 71 40 52 38 37 33 34 31 46 57 58 48 RELATIVE HUMIDITY (MEAN% 15UTC) 80 70 42 49 38 38 35 34 40 59 72 71 52 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 42.5 43.8 10.2 85.8 8.1 18.1 15.0 0.0 6.0 37.1 20.0 22.0 308.6 DAYS WITH PRECIPITATION >=10 1 3 1 2 0 1 1 0 0 2 1 1 13 DAYS WITH PRECIPITATION >= 5 3 3 1 5 0 1 1 0 1 3 2 1 21 DAYS WITH PRECIPITATION >= 1 8 5 1 9 4 5 1 0 1 8 3 6 51 DAYS WITH PRECIPITATION 10 8 5 19 8 7 3 2 2 10 4 9 87 GREATEST DAILY PRECIPITATION 15.6 17.0 10.0 27.0 3.0 10.0 15.0 0.0 6.0 14.0 10.0 12.0 27.0 DAY 5 5 10 20 30 6 13 ** 17 22 5 22 DAY WITH THUNDER STORM 0 0 0 5 6 1 3 1 0 3 0 0 19 DAYS WITH SNOW OR SLEET 11 7 0 0 0 0 0 0 0 0 0 2 20 DAYS WITH DUST 0 0 4 0 1 2 1 2 1 1 0 1 13 WIND DIRECTION (PREVAILING) 180 180 180 180 180 180 180 180 180 180 270 225 180 PREVAILING WIND SPEED(KNOTS) 3.1 4.8 4.1 3.7 4.0 3.5 2.5 2.8 2.6 2.9 2.0 3.6 3.3 PREVAILING WIND PERCENT 26.6 41.1 23.0 30.5 28.2 31.7 39.1 53.4 49.4 42.8 17.4 25.1 33.4 CALMS PERCENT OF WIND 65.7 49.1 51.2 39.3 46.4 43.3 46.8 24.3 25.1 28.8 37.4 34.8 41.1 NO. OF WIND OBSERVATION 248 224 248 239 248 240 248 247 239 243 235 247 2906 VECTOR WIND DIRECTION (MEAN) 181 165 187 179 161 174 161 167 161 183 209 211 177 VECTOR WIND MAGNITUDE(KNOTS) 1.0 2.4 1.8 1.9 1.5 1.4 1.1 1.9 1.8 1.8 0.8 1.8 1.5 WIND STEADINESES (MEAN %) 90.9 88.9 72.0 76.0 71.4 63.6 73.3 73.1 72.0 66.7 50.0 72.0 68.2 WIND SPEED (MEAN KNOTS) 1.1 2.7 2.5 2.5 2.1 2.2 1.5 2.6 2.5 2.7 1.6 2.5 2.2 FASTEST WIND DIRECTION 210 180 230 210 210 240 300 130 200 210 180 270 270 FASTEST WIND SPEED (KNOTS) 18 32 24 20 30 24 12 18 18 18 13 35 35 DAY 4 17 27 29 5 8 6 3 11 8 6 6 DAYS WITH SKY CLEAR (0-2)/8 5 8 10 6 17 24 29 24 27 5 16 11 182 DAYS WITH P.CLOUDY (3-6)/8 4 10 15 12 14 6 2 7 3 23 10 14 120 DAYS WITH CLOUDY (7-8)/8 22 10 6 12 0 0 0 0 0 3 4 6 63 DAYS WITH VISIBILITY =< 2 KM 8 4 1 0 1 1 0 1 0 0 0 1 17 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 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 868.2 863.8 863.1 861.9 863.5 862.5 861.2 863.3 865.2 868.3 862.5 865.1 864.1 MAX. QFE PRESSURE IN HPA 879.7 874.1 872.3 869.5 870.0 868.8 867.3 871.3 873.9 875.5 870.0 871.9 879.7 DAY-HOUR 19- 6 2- 0 3- 6 19- 0 16- 6 2- 0 27- 6 26- 6 25- 9 28- 6 23- 9 28- 6 MIN. QFE PRESSURE IN HPA 852.5 847.6 847.2 853.3 856.0 855.4 855.9 853.7 856.2 857.6 856.3 855.5 847.2 DAY-HOUR 4-18 20-15 27-12 4-15 10- 9 9- 3 14-15 2-15 11-15 10- 3 9-15 16-15 MEAN QNH PRESSURE IN HPA 1016.8 1011.8 1011.0 1009.6 1011.4 1010.3 1008.8 1011.2 1013.3 1016.9 1010.4 1013.3 1012.1 MAX. QNH PRESSURE IN HPA 1029.9 1023.5 1021.5 1018.3 1018.8 1017.5 1015.8 1020.3 1023.3 1025.1 1018.8 1021.0 1029.9 DAY-HOUR 19- 6 2- 0 3- 6 19- 0 16- 6 2- 0 27- 6 26- 6 25- 9 28- 6 23- 9 28- 6 MIN. QNH PRESSURE IN HPA 998.9 993.4 992.9 999.8 1002.9 1002.2 1002.8 1000.3 1003.2 1004.7 1003.3 1002.4 992.9 DAY-HOUR 4-18 20-15 27-12 4-15 10- 9 9- 3 14-15 2-15 11-15 10- 3 9-15 16-15 MEAN QFF PRESSURE IN HPA 1022.4 1015.3 1009.3 1006.8 1004.8 1001.9 997.7 1001.2 1005.6 1012.6 1009.3 1014.7 1008.5 MAX. QFF PRESSURE IN HPA 1037.8 1030.8 1022.9 1017.1 1012.4 1012.6 1005.0 1010.8 1016.7 1022.9 1018.4 1024.5 1037.8 DAY-HOUR 19- 6 2- 6 3- 6 24- 6 16- 6 10- 6 27- 6 26- 6 25- 6 28- 6 24- 3 28- 6 MIN. QFF PRESSURE IN HPA 999.5 993.7 989.9 996.9 997.6 992.1 991.8 990.0 993.1 999.2 999.8 1004.0 989.9 DAY-HOUR 4-15 20-12 27-12 4-15 26-12 28-15 21-18 2-12 11-12 10- 3 3-21 17- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 868.2 863.9 863.2 862.1 863.9 863.0 861.5 863.8 865.3 868.4 862.6 865.2 864.3 MAX. QFE PRESSURE IN HPA 879.4 874.1 871.5 869.5 869.3 868.8 865.9 870.2 872.8 874.8 868.9 871.1 879.4 DAY 19 2 3 19 16 2 27 9 26 28 24 28 MIN. QFE PRESSURE IN HPA 855.0 849.3 848.8 854.5 857.4 856.0 858.3 856.3 857.0 858.5 857.2 857.2 848.8 DAY 5 21 28 27 10 9 9 22 12 10 6 17 MEAN QNH PRESSURE IN HPA 1016.8 1011.9 1011.1 1009.8 1011.9 1010.8 1009.1 1011.8 1013.5 1017.0 1010.5 1013.4 1012.3 MAX. QNH PRESSURE IN HPA 1029.5 1023.5 1020.5 1018.3 1018.0 1017.5 1014.2 1019.1 1022.0 1024.3 1017.6 1020.1 1029.5 DAY 19 2 3 19 16 2 27 9 26 28 24 28 MIN. QNH PRESSURE IN HPA 1001.8 995.3 994.7 1001.2 1004.5 1002.9 1005.5 1003.3 1004.1 1005.8 1004.3 1004.3 994.7 DAY 5 21 28 27 10 9 9 22 12 10 6 17 MEAN QFF PRESSURE IN HPA 1021.8 1015.2 1008.9 1006.7 1005.2 1002.3 997.6 1001.2 1005.1 1012.2 1008.9 1014.3 1008.3 MAX. QFF PRESSURE IN HPA 1036.5 1029.9 1020.9 1015.6 1011.9 1009.9 1002.4 1009.0 1013.9 1021.7 1015.9 1022.7 1036.5 DAY 19 2 3 24 16 10 27 26 26 28 24 29 MIN. QFF PRESSURE IN HPA 1003.7 997.0 991.8 998.1 999.2 994.0 993.4 992.0 993.7 1000.0 1000.7 1004.0 991.8 DAY 5 21 28 27 10 9 22 22 12 10 4 17 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 868.3 863.7 863.4 862.2 863.9 863.3 862.1 864.2 865.7 868.5 862.7 865.1 864.4 MAX. QFE PRESSURE IN HPA 879.2 873.9 871.7 869.3 869.4 868.8 866.7 870.5 873.1 874.8 869.3 871.1 879.2 DAY 19 2 3 19 16 2 27 9 25 28 24 4 MIN. QFE PRESSURE IN HPA 857.4 849.8 848.6 855.5 856.8 855.4 858.5 857.1 858.0 857.6 857.2 857.6 848.6 DAY 5 21 28 27 10 9 15 2 12 10 6 17 MEAN QNH PRESSURE IN HPA 1016.9 1011.7 1011.3 1009.9 1011.9 1011.2 1009.8 1012.2 1014.0 1017.1 1010.5 1013.3 1012.5 MAX. QNH PRESSURE IN HPA 1029.3 1023.3 1020.8 1018.0 1018.2 1017.5 1015.1 1019.4 1022.4 1024.3 1018.0 1020.1 1029.3 DAY 19 2 3 19 16 2 27 9 25 28 24 4 MIN. QNH PRESSURE IN HPA 1004.5 995.9 994.5 1002.4 1003.8 1002.2 1005.8 1004.2 1005.2 1004.7 1004.3 1004.7 994.5 DAY 5 21 28 27 10 9 15 2 12 10 6 17 MEAN QFF PRESSURE IN HPA 1022.9 1015.8 1010.2 1007.4 1006.1 1003.6 999.3 1002.8 1007.1 1013.6 1010.2 1015.2 1009.5 MAX. QFF PRESSURE IN HPA 1036.6 1030.5 1022.3 1015.9 1012.4 1011.7 1004.9 1010.7 1016.7 1022.7 1018.4 1023.2 1036.6 DAY 19 2 3 19 16 10 27 26 25 28 24 28 MIN. QFF PRESSURE IN HPA 1007.3 998.3 991.8 997.9 998.2 994.2 995.3 994.1 996.3 999.2 1001.7 1005.1 991.8 DAY 5 21 28 10 10 9 22 2 11 10 6 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 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 868.9 864.4 864.2 862.8 864.4 863.6 862.5 864.5 866.4 869.1 863.3 865.7 865.0 MAX. QFE PRESSURE IN HPA 879.7 873.9 872.3 869.3 870.0 868.4 867.3 871.3 873.7 875.5 868.9 871.9 879.7 DAY 19 1 3 24 16 1 27 26 25 28 23 28 MIN. QFE PRESSURE IN HPA 858.9 851.9 849.0 856.1 856.7 857.2 859.3 856.9 858.2 859.0 857.2 858.6 849.0 DAY 4 20 28 27 10 8 15 2 11 10 6 17 MEAN QNH PRESSURE IN HPA 1017.5 1012.4 1012.2 1010.6 1012.5 1011.5 1010.3 1012.6 1014.7 1017.8 1011.2 1014.0 1013.1 MAX. QNH PRESSURE IN HPA 1029.9 1023.3 1021.5 1018.0 1018.8 1017.0 1015.8 1020.3 1023.0 1025.1 1017.6 1021.0 1029.9 DAY 19 1 3 24 16 1 27 26 25 28 23 28 MIN. QNH PRESSURE IN HPA 1006.2 998.3 995.0 1003.0 1003.7 1004.3 1006.7 1003.9 1005.4 1006.3 1004.3 1005.9 995.0 DAY 4 20 28 27 10 8 15 2 11 10 6 17 MEAN QFF PRESSURE IN HPA 1023.6 1016.4 1010.9 1008.0 1005.8 1003.0 999.4 1002.8 1007.2 1013.8 1010.5 1015.9 1009.8 MAX. QFF PRESSURE IN HPA 1037.8 1030.8 1022.9 1017.1 1012.4 1012.6 1005.0 1010.8 1016.7 1022.9 1016.8 1024.5 1037.8 DAY 19 2 3 24 16 10 27 26 25 28 24 28 MIN. QFF PRESSURE IN HPA 1006.3 998.6 992.7 998.3 998.6 993.7 994.5 993.0 994.9 1002.0 1001.8 1005.8 992.7 DAY 4 20 28 10 10 8 22 2 11 10 6 17 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 868.6 864.6 863.8 862.7 863.9 863.1 861.9 863.9 865.8 868.9 863.1 865.7 864.7 MAX. QFE PRESSURE IN HPA 879.5 873.9 872.2 869.1 869.8 868.6 866.3 870.7 873.9 875.2 870.0 871.9 879.5 DAY 18 1 3 24 16 1 27 9 25 28 23 28 MIN. QFE PRESSURE IN HPA 857.3 850.2 849.2 856.6 856.0 856.9 858.6 856.3 858.1 858.5 857.6 858.7 849.2 DAY 4 20 28 26 10 8 15 2 11 10 9 17 MEAN QNH PRESSURE IN HPA 1017.2 1012.6 1011.8 1010.5 1011.9 1011.0 1009.6 1011.9 1014.1 1017.5 1011.0 1013.9 1012.8 MAX. QNH PRESSURE IN HPA 1029.6 1023.3 1021.3 1017.8 1018.6 1017.2 1014.6 1019.6 1023.3 1024.7 1018.8 1021.0 1029.6 DAY 18 1 3 24 16 1 27 9 25 28 23 28 MIN. QNH PRESSURE IN HPA 1004.4 996.3 995.2 1003.6 1002.9 1003.9 1005.9 1003.3 1005.3 1005.8 1004.7 1006.0 995.2 DAY 4 20 28 26 10 8 15 2 11 10 9 17 MEAN QFF PRESSURE IN HPA 1022.7 1015.8 1009.5 1007.5 1004.7 1002.4 998.3 1001.5 1005.8 1012.5 1009.3 1014.7 1008.7 MAX. QFF PRESSURE IN HPA 1036.4 1029.7 1021.3 1015.8 1011.5 1011.9 1003.5 1009.8 1015.4 1021.4 1017.0 1024.5 1036.4 DAY 18 2 3 24 13 10 27 9 25 28 24 28 MIN. QFF PRESSURE IN HPA 1003.8 996.4 992.2 999.3 998.1 994.0 992.9 991.7 995.0 1000.1 1001.3 1004.9 991.7 DAY 4 20 27 10 10 28 22 2 11 9 3 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 867.5 863.4 862.3 861.2 862.5 861.7 860.4 862.3 864.3 867.6 861.8 864.4 863.3 MAX. QFE PRESSURE IN HPA 878.9 871.8 870.4 867.1 868.5 867.5 865.3 869.1 873.0 873.9 868.0 870.2 878.9 DAY 18 1 15 13 16 1 27 9 25 27 23 28 MIN. QFE PRESSURE IN HPA 854.0 847.8 847.2 853.6 856.2 856.3 856.5 854.9 856.5 858.8 856.5 855.9 847.2 DAY 4 20 27 26 10 28 14 2 11 10 3 16 MEAN QNH PRESSURE IN HPA 1016.0 1011.4 1010.1 1008.9 1010.3 1009.4 1007.9 1010.1 1012.4 1016.2 1009.6 1012.4 1011.2 MAX. QNH PRESSURE IN HPA 1029.0 1020.9 1019.3 1015.5 1017.1 1016.0 1013.5 1017.8 1022.3 1023.3 1016.6 1019.1 1029.0 DAY 18 1 15 13 16 1 27 9 25 27 23 28 MIN. QNH PRESSURE IN HPA 1000.6 993.6 992.9 1000.2 1003.2 1003.3 1003.5 1001.7 1003.5 1006.1 1003.5 1002.8 992.9 DAY 4 20 27 26 10 28 14 2 11 10 3 16 MEAN QFF PRESSURE IN HPA 1021.0 1014.5 1007.7 1005.7 1003.5 1000.7 996.3 999.4 1003.9 1011.3 1007.8 1013.3 1007.1 MAX. QFF PRESSURE IN HPA 1035.6 1027.5 1018.7 1012.9 1010.1 1009.5 1001.8 1007.4 1014.1 1020.0 1014.1 1022.6 1035.6 DAY 18 2 3 23 15 10 27 9 25 27 23 28 MIN. QFF PRESSURE IN HPA 999.9 993.7 989.9 997.1 997.6 992.2 992.1 990.0 993.1 1001.0 999.9 1004.5 989.9 DAY 4 20 27 26 26 28 9 2 11 9 3 16 ======================================================================================================================= 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 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 868.0 863.4 862.3 861.1 862.5 861.2 859.5 861.7 864.0 867.6 861.9 864.7 863.2 MAX. QFE PRESSURE IN HPA 879.2 872.7 869.9 867.1 868.5 867.2 863.7 869.1 872.5 874.3 868.0 870.9 879.2 DAY 18 10 6 23 16 1 26 9 25 27 23 27 MIN. QFE PRESSURE IN HPA 853.4 847.6 847.3 853.3 856.8 855.4 855.9 853.7 856.2 859.2 856.3 855.5 847.3 DAY 4 20 27 4 10 28 14 2 11 9 9 16 MEAN QNH PRESSURE IN HPA 1016.6 1011.4 1010.0 1008.7 1010.3 1008.9 1006.9 1009.4 1012.0 1016.1 1009.6 1012.9 1011.1 MAX. QNH PRESSURE IN HPA 1029.3 1021.9 1018.7 1015.5 1017.1 1015.7 1011.7 1017.8 1021.7 1023.7 1016.6 1019.9 1029.3 DAY 18 10 6 23 16 1 26 9 25 27 23 27 MIN. QNH PRESSURE IN HPA 1000.0 993.4 993.0 999.8 1003.8 1002.2 1002.8 1000.3 1003.2 1006.6 1003.3 1002.4 993.0 DAY 4 20 27 4 10 28 14 2 11 9 9 16 MEAN QFF PRESSURE IN HPA 1022.6 1015.3 1008.8 1006.1 1004.3 1001.0 996.2 999.8 1005.0 1012.5 1009.4 1014.7 1008.0 MAX. QFF PRESSURE IN HPA 1036.1 1027.6 1019.2 1014.0 1010.7 1008.7 1001.5 1008.6 1015.5 1021.2 1016.0 1023.7 1036.1 DAY 18 10 2 23 15 10 27 9 25 27 23 30 MIN. QFF PRESSURE IN HPA 999.5 994.1 990.7 996.9 997.7 992.1 992.0 990.3 993.7 1001.4 1000.4 1004.7 990.3 DAY 4 20 27 4 25 28 11 2 11 9 3 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 868.2 863.5 862.8 861.5 863.1 861.9 860.4 862.7 864.8 868.2 862.5 865.2 863.7 MAX. QFE PRESSURE IN HPA 879.4 872.9 870.4 867.9 868.5 867.8 864.1 868.5 872.8 874.5 868.4 871.2 879.4 DAY 18 10 2 23 15 1 26 9 25 27 23 30 MIN. QFE PRESSURE IN HPA 852.5 847.8 848.3 853.6 857.0 856.7 857.0 854.7 856.9 859.4 857.0 856.9 847.8 DAY 4 20 27 26 10 28 8 2 11 9 4 16 MEAN QNH PRESSURE IN HPA 1016.8 1011.5 1010.6 1009.2 1011.0 1009.6 1007.9 1010.5 1013.0 1016.8 1010.3 1013.4 1011.7 MAX. QNH PRESSURE IN HPA 1029.5 1022.1 1019.3 1016.5 1017.1 1016.3 1012.1 1017.1 1022.0 1024.0 1017.0 1020.2 1029.5 DAY 18 10 2 23 15 1 26 9 25 27 23 30 MIN. QNH PRESSURE IN HPA 998.9 993.6 994.2 1000.2 1004.1 1003.7 1004.1 1001.4 1003.9 1006.8 1004.1 1003.9 993.6 DAY 4 20 27 26 10 28 8 2 11 9 4 16 MEAN QFF PRESSURE IN HPA 1022.8 1015.4 1009.3 1006.5 1004.3 1001.0 997.0 1000.8 1005.5 1012.8 1009.7 1015.3 1008.4 MAX. QFF PRESSURE IN HPA 1036.5 1028.7 1020.4 1015.8 1011.3 1009.0 1001.4 1007.9 1015.8 1021.6 1016.0 1024.5 1036.5 DAY 18 1 2 23 15 17 27 26 25 27 23 30 MIN. QFF PRESSURE IN HPA 999.8 994.8 991.4 997.4 997.7 993.2 991.8 990.2 993.7 1000.3 1000.4 1005.6 990.2 DAY 4 20 27 26 25 28 21 2 11 9 3 16 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 868.2 863.5 863.2 861.9 863.7 862.3 861.4 863.7 865.1 868.4 862.6 865.1 864.1 MAX. QFE PRESSURE IN HPA 879.5 873.6 871.1 868.9 869.0 868.3 865.5 870.0 873.0 874.7 868.8 871.1 879.5 DAY 18 10 2 18 15 1 26 8 25 27 23 27 MIN. QFE PRESSURE IN HPA 853.5 848.5 848.9 854.1 857.8 856.9 858.3 856.3 857.4 859.6 857.3 857.8 848.5 DAY 4 20 27 26 9 8 3 21 11 9 3 16 MEAN QNH PRESSURE IN HPA 1016.8 1011.4 1011.1 1009.6 1011.7 1010.1 1009.1 1011.6 1013.3 1017.0 1010.4 1013.3 1012.1 MAX. QNH PRESSURE IN HPA 1029.6 1022.9 1020.1 1017.6 1017.7 1016.9 1013.7 1018.8 1022.3 1024.2 1017.5 1020.1 1029.6 DAY 18 10 2 18 15 1 26 8 25 27 23 27 MIN. QNH PRESSURE IN HPA 1000.1 994.4 994.8 1000.8 1005.0 1003.9 1005.5 1003.3 1004.5 1007.0 1004.4 1005.0 994.4 DAY 4 20 27 26 9 8 3 21 11 9 3 16 MEAN QFF PRESSURE IN HPA 1022.1 1014.5 1008.8 1006.6 1004.6 1001.4 997.8 1001.4 1005.0 1012.1 1008.9 1014.1 1008.1 MAX. QFF PRESSURE IN HPA 1036.5 1029.0 1019.9 1015.6 1011.5 1009.6 1002.4 1008.8 1014.6 1021.6 1015.6 1024.0 1036.5 DAY 18 1 2 23 15 17 26 9 25 27 23 30 MIN. QFF PRESSURE IN HPA 1001.4 996.0 990.8 998.1 998.7 994.4 992.5 992.0 993.4 1000.1 999.8 1005.2 990.8 DAY 4 20 27 26 8 8 21 21 11 9 3 22 ======================================================================================================================= 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 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** 23.9 22.8 19.7 14.2 6.9 -1.0 ***** MINIMUN AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** 16.4 16.0 12.1 8.0 1.7 -4.9 ***** DAYS WITH MINIMUM TEMP. >=21 **** **** **** **** **** **** 0 0 0 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** **** **** **** **** **** 0 0 0 0 0 17 **** DAYS WITH FREEZING MIN.<= 0 **** **** **** **** **** **** 0 0 0 0 6 30 **** TEMPERATURE RECORDS LOWEST(C) ***** ***** ***** ***** ***** ***** 14.0 14.0 9.0 3.0 -2.0 -13.0 ***** DAY ** ** ** ** ** ** 5 12 11 31 27 26 MAXIMUM AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** 31.2 30.2 28.1 21.9 14.2 4.8 ***** DAYS WITH MAXIMUM TEMP. >=30 **** **** **** **** **** **** 24 17 7 0 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 **** **** **** **** **** **** 0 0 0 0 0 5 **** TEMPERATURE RECORDS HIGHEST(C)***** ***** ***** ***** ***** ***** 35.0 35.0 32.0 28.0 17.0 11.0 ***** DAY ** ** ** ** ** ** 18 24 2 1 1 21 DIF. BETWEEN (MAX.-MIN.) (C) ***** ***** ***** ***** ***** ***** 14.8 14.2 16.0 13.9 12.5 9.7 ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** ***** ***** ***** ***** 23.8 23.1 20.1 14.9 7.9 -0.0 ***** COOLING DEG. DAYS(BASE 21 0C)****** ****** ****** ****** ****** ****** 85.5 64.5 8.5 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C)****** ****** ****** ****** ****** ****** 0.0 0.0 0.5 99.5 302.5 559.5 ****** DEWPOINT (MEAN C) ***** ***** ***** ***** ***** ***** 11.0 11.5 7.3 6.6 1.5 -3.9 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** ****** 9.83 10.09 7.61 7.15 5.04 3.44 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** ****** 13.37 13.74 10.44 9.85 6.97 4.76 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** ****** 17.40 15.01 13.65 7.19 3.34 1.16 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** 47 51 47 63 70 82 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** *** 65 69 65 81 85 90 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** *** 29 34 29 43 50 69 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** 64 67 61 76 83 84 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** 38 39 36 48 52 76 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** *** 32 39 39 60 70 83 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** ****** ****** ****** ****** 0.0 0.0 0.2 43.1 16.0 66.5 ****** DAYS WITH PRECIPITATION >=10 **** **** **** **** **** **** 0 0 0 2 1 3 **** DAYS WITH PRECIPITATION >= 5 **** **** **** **** **** **** 0 0 0 3 1 6 **** DAYS WITH PRECIPITATION >= 1 **** **** **** **** **** **** 0 0 0 6 4 10 **** DAYS WITH PRECIPITATION **** **** **** **** **** **** 0 1 1 10 6 11 **** GREATEST DAILY PRECIPITATION ****** ****** ****** ****** ****** ****** 0.0 0.0 0.2 15.0 10.0 12.5 ****** DAY ** ** ** ** ** ** ** ** 21 21 3 30 DAY WITH THUNDER STORM **** **** **** **** **** **** 0 0 2 7 0 1 **** DAYS WITH SNOW OR SLEET **** **** **** **** **** **** 0 0 0 0 0 11 **** DAYS WITH DUST **** **** **** **** **** **** 0 1 2 0 0 0 **** WIND DIRECTION (PREVAILING) *** *** *** *** *** *** 360 270 180 180 180 180 *** PREVAILING WIND SPEED(KNOTS) **** **** **** **** **** **** 3.6 3.0 3.0 3.6 2.5 2.9 **** PREVAILING WIND PERCENT ***** ***** ***** ***** ***** ***** 16.5 19.8 16.3 17.8 10.0 12.6 ***** CALMS PERCENT OF WIND ***** ***** ***** ***** ***** ***** 39.5 32.3 32.1 38.9 64.9 62.8 ***** NO. OF WIND OBSERVATION **** **** **** **** **** **** 248 248 240 247 239 247 1469 VECTOR WIND DIRECTION (MEAN) *** *** *** *** *** *** 323 309 234 185 184 216 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** **** **** **** 0.5 0.5 0.4 0.8 0.4 0.6 **** WIND STEADINESES (MEAN %) ***** ***** ***** ***** ***** ***** 25.0 25.0 20.0 42.1 44.4 54.5 ***** WIND SPEED (MEAN KNOTS) **** **** **** **** **** **** 2.0 2.0 2.0 1.9 0.9 1.1 **** FASTEST WIND DIRECTION *** *** *** *** *** *** 180 30 270 200 230 360 *** FASTEST WIND SPEED (KNOTS) *** *** *** *** *** *** 12 7 18 12 9 12 *** DAY ** ** ** ** ** ** 14 2 18 23 24 25 DAYS WITH SKY CLEAR (0-2)/8 **** **** **** **** **** **** 31 27 27 17 23 12 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** **** **** **** 0 4 3 12 3 10 **** DAYS WITH CLOUDY (7-8)/8 **** **** **** **** **** **** 0 0 0 2 4 9 **** DAYS WITH VISIBILITY =< 2 KM **** **** **** **** **** **** 0 0 0 0 0 6 **** 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 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 859.8 861.0 864.7 867.2 867.4 866.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 864.1 865.7 874.8 872.8 872.8 878.2 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 29- 9 16- 6 24- 6 18- 6 6- 6 25-21 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 854.1 855.8 856.1 861.4 861.1 851.4 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 14-15 12-15 2-15 23-12 30-15 10-15 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1007.2 1008.7 1012.9 1015.6 1015.8 1014.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1012.1 1014.0 1024.3 1022.0 1022.0 1028.2 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 29- 9 16- 6 24- 6 18- 6 6- 6 25-21 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1000.8 1002.7 1003.0 1009.1 1008.7 997.7 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 14-15 12-15 2-15 23-12 30-15 10-15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 997.1 999.1 1005.2 1010.9 1015.3 1019.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1002.3 1005.7 1017.7 1018.4 1021.5 1038.0 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 29- 9 16- 6 24- 3 18- 6 26-18 26- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 988.8 992.8 993.6 1001.7 1006.0 998.4 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 23-12 12-12 2-12 1-12 1-12 10- 6 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 860.0 861.6 865.0 867.4 867.5 866.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 862.8 865.5 874.1 871.8 872.5 878.0 ****** DAY ** ** ** ** ** ** 29 17 24 18 6 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 856.0 857.8 857.8 862.2 864.8 852.7 ****** DAY ** ** ** ** ** ** 23 13 3 23 16 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1007.5 1009.2 1013.2 1015.8 1016.0 1015.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1010.7 1013.7 1023.5 1020.9 1021.7 1027.9 ****** DAY ** ** ** ** ** ** 29 17 24 18 6 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1002.9 1005.0 1005.0 1010.0 1012.9 999.2 ****** DAY ** ** ** ** ** ** 23 13 3 23 16 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 997.2 999.3 1005.1 1010.7 1014.9 1018.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1000.3 1004.8 1016.4 1016.0 1020.2 1037.5 ****** DAY ** ** ** ** ** ** 29 17 24 18 6 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 990.8 994.0 995.3 1002.8 1009.8 1000.1 ****** DAY ** ** ** ** ** ** 23 13 3 1 2 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 860.5 861.9 865.2 867.5 867.4 866.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 863.3 865.7 874.2 872.0 872.2 877.0 ****** DAY ** ** ** ** ** ** 29 17 24 18 6 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 856.4 858.1 858.8 861.9 863.5 851.7 ****** DAY ** ** ** ** ** ** 23 12 3 22 1 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1008.1 1009.6 1013.4 1016.0 1015.9 1014.7 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1011.2 1014.0 1023.6 1021.1 1021.3 1026.8 ****** DAY ** ** ** ** ** ** 29 17 24 18 6 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1003.4 1005.3 1006.1 1009.6 1011.5 998.0 ****** DAY ** ** ** ** ** ** 23 12 3 22 1 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.4 1000.5 1006.5 1012.2 1016.3 1019.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1002.0 1005.5 1017.7 1017.8 1021.4 1037.3 ****** DAY ** ** ** ** ** ** 31 17 24 9 6 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 992.1 995.8 997.1 1005.0 1008.5 999.6 ****** DAY ** ** ** ** ** ** 23 13 3 1 1 10 ======================================================================================================================= 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 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 860.8 862.1 865.6 868.0 868.1 867.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 863.4 865.7 874.8 872.8 872.8 877.4 ****** DAY ** ** ** ** ** ** 29 16 24 18 6 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 856.6 857.8 859.0 861.8 864.6 851.7 ****** DAY ** ** ** ** ** ** 23 12 3 23 1 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1008.4 1009.8 1013.9 1016.6 1016.7 1015.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1011.3 1014.0 1024.3 1022.0 1022.0 1027.2 ****** DAY ** ** ** ** ** ** 29 16 24 18 6 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1003.6 1005.0 1006.3 1009.5 1012.7 998.0 ****** DAY ** ** ** ** ** ** 23 12 3 23 1 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.5 1000.6 1006.5 1012.0 1016.6 1020.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1001.9 1005.7 1016.9 1018.4 1021.4 1038.0 ****** DAY ** ** ** ** ** ** 29 16 24 18 6 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 992.5 995.6 997.4 1004.5 1009.3 998.4 ****** DAY ** ** ** ** ** ** 23 12 3 1 1 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 860.4 861.7 865.2 867.6 867.7 866.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 864.1 865.1 874.2 872.3 872.5 877.9 ****** DAY ** ** ** ** ** ** 29 17 24 9 5 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 856.2 857.4 858.8 861.8 863.5 852.7 ****** DAY ** ** ** ** ** ** 23 12 3 23 24 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1008.0 1009.4 1013.4 1016.1 1016.3 1015.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1012.1 1013.3 1023.6 1021.5 1021.7 1027.8 ****** DAY ** ** ** ** ** ** 29 17 24 9 5 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1003.2 1004.5 1006.1 1009.5 1011.5 999.2 ****** DAY ** ** ** ** ** ** 23 12 3 23 24 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 997.6 999.5 1005.2 1010.7 1015.3 1019.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1002.3 1004.4 1016.1 1017.2 1020.8 1036.5 ****** DAY ** ** ** ** ** ** 29 16 24 18 26 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 991.4 994.4 996.0 1003.6 1009.7 999.2 ****** DAY ** ** ** ** ** ** 23 12 3 1 24 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 859.0 860.1 863.8 866.3 866.4 865.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 861.7 864.1 871.8 870.8 871.4 877.1 ****** DAY ** ** ** ** ** ** 26 16 24 9 5 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 854.3 856.3 856.7 861.4 861.7 851.5 ****** DAY ** ** ** ** ** ** 14 12 2 23 1 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1006.3 1007.6 1011.8 1014.6 1014.8 1014.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1009.4 1012.1 1020.9 1019.7 1020.4 1026.9 ****** DAY ** ** ** ** ** ** 26 16 24 9 5 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1001.0 1003.3 1003.7 1009.1 1009.4 997.8 ****** DAY ** ** ** ** ** ** 14 12 2 23 1 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 995.9 997.6 1003.6 1009.4 1013.6 1017.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.7 1003.3 1013.3 1014.6 1019.6 1034.9 ****** DAY ** ** ** ** ** ** 9 16 23 18 26 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 988.8 992.8 993.6 1001.7 1006.0 998.4 ****** DAY ** ** ** ** ** ** 23 12 2 1 1 10 ======================================================================================================================= 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 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 858.2 859.4 863.7 866.4 866.7 866.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 860.4 863.3 872.2 870.5 871.9 877.4 ****** DAY ** ** ** ** ** ** 29 16 24 9 5 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 854.1 855.8 856.1 861.9 861.1 851.4 ****** DAY ** ** ** ** ** ** 14 12 2 23 30 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1005.5 1006.8 1011.6 1014.7 1015.1 1014.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1007.9 1011.2 1021.3 1019.4 1021.0 1027.2 ****** DAY ** ** ** ** ** ** 29 16 24 9 5 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1000.8 1002.7 1003.0 1009.6 1008.7 997.7 ****** DAY ** ** ** ** ** ** 14 12 2 23 30 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 995.7 997.5 1004.6 1010.9 1015.4 1019.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.7 1002.5 1015.1 1015.7 1021.1 1037.1 ****** DAY ** ** ** ** ** ** 10 15 23 18 26 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 990.6 993.2 994.1 1004.1 1007.5 999.3 ****** DAY ** ** ** ** ** ** 23 13 2 1 1 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 859.4 860.5 864.6 867.1 867.3 866.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 861.5 865.3 873.6 871.2 872.7 877.9 ****** DAY ** ** ** ** ** ** 10 16 23 8 5 25 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 856.2 856.5 857.2 862.5 861.1 852.3 ****** DAY ** ** ** ** ** ** 23 12 2 20 30 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1006.7 1008.1 1012.7 1015.5 1015.7 1015.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1009.2 1013.5 1022.9 1020.2 1021.9 1027.8 ****** DAY ** ** ** ** ** ** 10 16 23 8 5 25 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1003.2 1003.5 1004.3 1010.3 1008.7 998.7 ****** DAY ** ** ** ** ** ** 23 12 2 20 30 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 996.8 998.8 1005.3 1011.0 1015.7 1019.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1000.1 1005.2 1017.0 1016.1 1021.5 1037.7 ****** DAY ** ** ** ** ** ** 10 16 23 18 26 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 991.5 993.7 995.3 1003.9 1008.2 999.6 ****** DAY ** ** ** ** ** ** 23 12 2 1 1 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 859.9 861.3 865.0 867.4 867.7 866.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 862.4 865.5 874.0 871.5 872.7 878.2 ****** DAY ** ** ** ** ** ** 28 16 23 8 5 25 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 856.6 857.5 857.6 862.9 864.5 852.9 ****** DAY ** ** ** ** ** ** 22 12 2 21 1 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1007.3 1008.9 1013.2 1015.9 1016.2 1015.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1010.2 1013.7 1023.4 1020.5 1021.9 1028.2 ****** DAY ** ** ** ** ** ** 28 16 23 8 5 25 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1003.6 1004.6 1004.7 1010.8 1012.6 999.4 ****** DAY ** ** ** ** ** ** 22 12 2 21 1 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 997.0 999.1 1005.1 1010.6 1015.1 1019.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1000.2 1004.8 1016.8 1014.7 1020.6 1037.7 ****** DAY ** ** ** ** ** ** 28 16 23 17 5 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 991.9 994.3 994.4 1004.3 1008.6 1000.8 ****** DAY ** ** ** ** ** ** 22 12 2 1 1 10 ======================================================================================================================= 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 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -11.8 -2.6 6.1 8.1 16.5 21.7 24.4 23.1 19.3 12.0 6.9 -0.7 10.3 MINIMUN AIR TEMPERATURE (C) -16.4 -6.8 1.3 2.9 8.7 14.0 17.0 15.6 11.6 5.2 2.2 -3.8 4.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 31 26 3 0 0 0 0 0 0 0 3 15 78 DAYS WITH FREEZING MIN.<= 0 31 29 11 8 0 0 0 0 0 0 4 29 112 TEMPERATURE RECORDS LOWEST(C) -22.0 -13.0 -6.0 -2.0 4.0 9.0 14.0 12.0 9.0 2.0 -9.0 -11.0 -22.0 DAY 24 1 1 16 1 7 1 29 19 4 29 27 MAXIMUM AIR TEMPERATURE (C) -4.5 1.8 11.7 14.0 23.2 28.8 31.4 30.7 27.4 20.7 13.9 4.5 17.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 13 27 25 4 0 0 0 70 DAYS WITH MAXIMUM TEMP. <= 0 28 10 0 0 0 0 0 0 0 0 0 1 39 TEMPERATURE RECORDS HIGHEST(C) 6.0 6.0 18.0 22.0 30.0 31.0 34.0 35.0 32.0 26.0 19.0 11.0 35.0 DAY 17 2 31 5 31 6 17 13 7 2 8 7 DIF. BETWEEN (MAX.-MIN.) (C) 11.9 8.6 10.4 11.1 14.5 14.8 14.4 15.1 15.8 15.5 11.7 8.3 12.7 MEAN DAILY TEMP. (MDT) (C) -10.5 -2.5 6.5 8.4 15.9 21.4 24.2 23.2 19.5 13.0 8.0 0.4 10.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.5 18.5 99.0 67.5 6.0 0.0 0.0 0.0 192.5 HEATING DEG. DAYS(BASE 18 0C) 882.0 594.0 356.5 286.5 81.0 0.0 0.0 0.0 3.0 156.0 298.5 546.5 3204.0 DEWPOINT (MEAN C) -14.7 -4.8 0.7 0.4 4.6 8.7 11.1 9.8 6.7 1.3 -2.1 -5.1 1.4 MIXING RATIO (G/KG) 1.54 3.17 4.80 4.64 6.33 8.44 9.92 9.12 7.38 4.92 3.92 3.12 5.61 VAPOUR PRESSURE (HPA) 2.13 4.38 6.60 6.38 8.70 11.52 13.49 12.40 10.12 6.82 5.42 4.34 7.69 SATURATION DEF. (HPA) 0.53 0.79 3.15 5.12 11.15 15.32 18.06 17.06 13.42 8.02 5.21 1.66 8.29 RELATIVE HUMIDITY (MEAN %) 79 85 71 63 48 46 46 45 47 50 55 73 59 RELATIVE HUMIDITY (MAX. %) 86 92 85 80 67 64 64 62 64 66 71 84 74 RELATIVE HUMIDITY (MIN. %) 70 76 54 45 30 30 29 28 30 31 37 60 43 RELATIVE HUMIDITY (MEAN% 03UTC) 78 87 83 75 62 61 62 61 60 63 66 78 70 RELATIVE HUMIDITY (MEAN% 09UTC) 81 83 59 53 39 36 36 37 36 36 40 64 50 RELATIVE HUMIDITY (MEAN% 15UTC) 80 87 64 56 34 34 33 33 37 48 55 74 53 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 28.3 51.0 73.2 125.6 0.5 2.5 0.0 0.0 0.0 0.0 15.4 15.3 311.8 DAYS WITH PRECIPITATION >=10 1 1 3 6 0 0 0 0 0 0 0 0 11 DAYS WITH PRECIPITATION >= 5 1 5 5 10 0 0 0 0 0 0 2 0 23 DAYS WITH PRECIPITATION >= 1 4 6 10 13 0 1 0 0 0 0 4 7 45 DAYS WITH PRECIPITATION 14 12 15 16 6 4 0 0 0 0 4 8 79 GREATEST DAILY PRECIPITATION 23.0 22.0 21.0 22.0 0.2 2.0 0.0 0.0 0.0 0.0 7.4 4.0 23.0 DAY 18 3 12 17 11 1 ** ** ** ** 27 11 DAY WITH THUNDER STORM 0 0 1 0 2 3 0 0 0 0 0 0 6 DAYS WITH SNOW OR SLEET 12 9 1 7 0 0 0 0 0 0 1 10 40 DAYS WITH DUST 0 0 0 0 0 0 1 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 270 180 180 225 90 360 360 360 360 180 225 180 PREVAILING WIND SPEED(KNOTS) 2.9 2.0 3.4 4.5 3.8 3.2 3.2 3.2 2.9 4.0 8.8 2.8 4.0 PREVAILING WIND PERCENT 20.6 15.9 21.1 19.2 13.4 11.3 20.2 19.0 13.8 10.1 14.6 6.9 11.5 CALMS PERCENT OF WIND 44.0 57.3 34.8 27.9 36.4 43.1 34.7 34.7 47.7 50.6 50.8 75.7 44.8 NO. OF WIND OBSERVATION 248 232 247 240 247 239 248 248 239 247 240 247 2922 VECTOR WIND DIRECTION (MEAN) 214 241 193 201 188 86 340 352 321 315 186 219 208 VECTOR WIND MAGNITUDE(KNOTS) 1.2 0.5 0.8 1.1 0.9 0.2 0.5 0.3 0.3 0.3 1.9 0.2 0.4 WIND STEADINESES (MEAN %) 75.0 55.6 40.0 42.3 39.1 10.5 27.8 14.3 21.4 21.4 67.9 28.6 22.2 WIND SPEED (MEAN KNOTS) 1.6 0.9 2.0 2.6 2.3 1.9 1.8 2.1 1.4 1.4 2.8 0.7 1.8 FASTEST WIND DIRECTION 210 180 180 200 180 180 170 230 250 360 180 340 180 FASTEST WIND SPEED (KNOTS) 10 5 18 24 18 9 8 12 10 13 28 9 28 DAY 29 3 26 6 11 15 9 26 7 3 26 25 DAYS WITH SKY CLEAR (0-2)/8 14 2 1 10 21 25 28 29 27 25 15 14 211 DAYS WITH P.CLOUDY (3-6)/8 13 9 21 10 10 5 3 2 3 5 12 5 98 DAYS WITH CLOUDY (7-8)/8 4 18 9 10 0 0 0 0 0 1 3 12 57 DAYS WITH VISIBILITY =< 2 KM 3 6 1 6 0 1 0 0 0 0 0 1 18 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 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 868.1 863.9 861.8 860.6 863.2 861.0 859.2 858.8 864.0 869.3 866.2 869.6 863.8 MAX. QFE PRESSURE IN HPA 876.4 871.6 868.9 872.4 867.2 869.0 866.9 863.7 871.7 874.6 875.6 876.1 876.4 DAY-HOUR 13- 6 27- 6 17- 6 24- 9 24- 6 3- 3 23- 6 21- 6 16- 6 26- 6 30-18 1- 6 MIN. QFE PRESSURE IN HPA 846.5 852.5 849.9 849.5 858.3 854.4 853.3 853.2 857.3 857.9 846.8 855.3 846.5 DAY-HOUR 18- 9 3-15 12-12 9- 3 1- 0 26-15 8-15 17-15 7-15 2-15 26-21 24-12 MEAN QNH PRESSURE IN HPA 1016.6 1011.9 1009.5 1008.1 1011.1 1008.6 1006.5 1006.1 1012.0 1018.1 1014.5 1018.4 1011.8 MAX. QNH PRESSURE IN HPA 1026.1 1020.7 1017.6 1021.6 1015.7 1017.7 1015.3 1011.7 1020.8 1024.1 1025.2 1025.8 1026.1 DAY-HOUR 13- 6 27- 6 17- 6 24- 9 24- 6 3- 3 23- 6 21- 6 16- 6 26- 6 30-18 1- 6 MIN. QNH PRESSURE IN HPA 992.1 998.9 996.0 995.5 1005.5 1001.1 999.8 999.7 1004.4 1005.1 992.5 1002.1 992.1 DAY-HOUR 18- 9 3-15 12-12 9- 3 1- 0 26-15 8-15 17-15 7-15 2-15 26-21 24-12 MEAN QFF PRESSURE IN HPA 1027.9 1017.0 1009.3 1006.8 1005.2 999.8 996.2 996.4 1004.5 1014.9 1014.0 1022.6 1009.5 MAX. QFF PRESSURE IN HPA 1041.5 1027.2 1018.2 1021.1 1010.6 1009.3 1006.1 1003.2 1014.8 1023.0 1032.0 1034.1 1041.5 DAY-HOUR 13- 6 16-15 9- 6 24- 6 2- 3 3- 3 23- 6 31- 3 16- 6 31- 6 30-18 26- 6 MIN. QFF PRESSURE IN HPA 995.4 1003.3 994.9 993.4 998.3 991.6 989.8 989.1 995.6 998.1 992.4 1003.0 989.1 DAY-HOUR 18- 0 3-15 12-12 6- 9 10-18 26-18 8-15 17-15 7-12 2-21 26-21 24-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 867.7 864.0 861.8 860.5 863.2 861.5 859.6 859.0 864.0 869.3 866.1 869.9 863.9 MAX. QFE PRESSURE IN HPA 875.3 870.6 867.4 871.0 866.1 868.3 866.4 863.0 870.8 873.9 873.8 875.6 875.6 DAY 30 1 17 24 18 3 23 21 16 26 2 1 MIN. QFE PRESSURE IN HPA 847.5 855.2 853.8 850.0 858.3 857.5 855.2 854.6 860.8 858.9 848.8 856.8 847.5 DAY 18 4 13 9 1 28 9 13 7 3 27 24 MEAN QNH PRESSURE IN HPA 1016.2 1012.0 1009.5 1008.1 1011.2 1009.2 1007.0 1006.3 1012.1 1018.0 1014.4 1018.7 1011.9 MAX. QNH PRESSURE IN HPA 1024.9 1019.5 1015.9 1020.0 1014.4 1016.9 1014.7 1010.9 1019.7 1023.3 1023.2 1025.2 1025.2 DAY 30 1 17 24 18 3 23 21 16 26 2 1 MIN. QNH PRESSURE IN HPA 993.3 1002.0 1000.4 996.1 1005.5 1004.6 1002.0 1001.3 1008.4 1006.2 994.7 1003.8 993.3 DAY 18 4 13 9 1 28 9 13 7 3 27 24 MEAN QFF PRESSURE IN HPA 1026.3 1016.8 1009.2 1006.3 1005.2 1000.3 996.4 996.4 1004.2 1014.0 1013.3 1022.1 1009.2 MAX. QFF PRESSURE IN HPA 1038.0 1026.9 1017.0 1017.4 1010.5 1008.6 1005.0 1001.4 1012.3 1021.5 1028.8 1031.1 1038.0 DAY 13 1 9 25 2 2 23 21 16 31 30 27 MIN. QFF PRESSURE IN HPA 995.4 1005.8 999.9 993.7 1000.4 994.7 991.8 990.8 999.6 999.3 995.7 1004.1 990.8 DAY 18 4 13 7 22 27 9 18 4 3 27 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 867.7 863.7 861.7 860.5 863.5 861.8 860.1 859.5 864.6 869.6 866.3 869.7 864.1 MAX. QFE PRESSURE IN HPA 875.7 870.8 867.6 871.1 866.5 869.0 866.8 863.4 871.2 873.9 874.4 875.5 875.7 DAY 30 27 17 24 24 3 23 21 16 26 1 1 MIN. QFE PRESSURE IN HPA 846.6 856.4 853.8 849.5 858.6 857.8 855.8 854.8 860.3 860.7 847.6 855.8 846.6 DAY 18 4 13 9 1 15 9 13 7 5 27 24 MEAN QNH PRESSURE IN HPA 1016.2 1011.7 1009.4 1008.0 1011.4 1009.5 1007.6 1006.9 1012.7 1018.4 1014.6 1018.5 1012.1 MAX. QNH PRESSURE IN HPA 1025.3 1019.7 1016.1 1020.1 1014.9 1017.7 1015.2 1011.3 1020.2 1023.3 1023.8 1025.1 1025.3 DAY 30 27 17 24 24 3 23 21 16 26 1 1 MIN. QNH PRESSURE IN HPA 992.2 1003.4 1000.4 995.5 1005.9 1005.0 1002.7 1001.6 1007.8 1008.3 993.4 1002.7 992.2 DAY 18 4 13 9 1 15 9 13 7 5 27 24 MEAN QFF PRESSURE IN HPA 1028.2 1017.2 1009.7 1007.1 1006.2 1001.2 997.6 997.7 1005.8 1016.1 1015.0 1023.2 1010.4 MAX. QFF PRESSURE IN HPA 1040.5 1025.9 1017.2 1020.4 1010.6 1009.3 1006.0 1003.2 1013.7 1022.5 1030.6 1032.6 1040.5 DAY 13 21 9 24 2 3 23 31 16 31 30 27 MIN. QFF PRESSURE IN HPA 995.8 1006.5 1000.0 993.5 1001.4 995.2 992.7 991.8 1000.0 1002.7 995.0 1003.8 991.8 DAY 18 4 12 7 22 15 9 13 7 3 27 24 ======================================================================================================================= 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 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 868.5 864.4 862.4 861.1 863.9 862.1 860.4 860.0 865.1 870.5 867.2 870.5 864.7 MAX. QFE PRESSURE IN HPA 876.4 871.6 868.9 872.2 867.2 868.9 866.9 863.7 871.7 874.6 875.5 876.1 876.4 DAY 13 27 17 24 24 3 23 21 16 26 1 1 MIN. QFE PRESSURE IN HPA 846.8 856.9 854.3 849.8 859.8 858.2 855.7 855.5 860.1 861.3 848.5 856.6 846.8 DAY 18 9 12 9 11 15 9 13 7 5 27 24 MEAN QNH PRESSURE IN HPA 1017.2 1012.5 1010.3 1008.7 1011.9 1009.9 1007.9 1007.5 1013.3 1019.5 1015.6 1019.4 1012.8 MAX. QNH PRESSURE IN HPA 1026.1 1020.7 1017.6 1021.3 1015.7 1017.6 1015.3 1011.7 1020.8 1024.1 1025.1 1025.8 1026.1 DAY 13 27 17 24 24 3 23 21 16 26 1 1 MIN. QNH PRESSURE IN HPA 992.5 1003.9 1001.0 995.9 1007.2 1005.4 1002.6 1002.4 1007.6 1008.9 994.4 1003.6 992.5 DAY 18 9 12 9 11 15 9 13 7 5 27 24 MEAN QFF PRESSURE IN HPA 1029.4 1018.1 1010.4 1007.5 1006.0 1001.0 997.8 997.9 1006.1 1016.6 1015.6 1024.2 1010.9 MAX. QFF PRESSURE IN HPA 1041.5 1027.0 1018.2 1021.1 1010.3 1008.7 1006.1 1002.9 1014.8 1023.0 1031.9 1034.1 1041.5 DAY 13 21 9 24 2 3 23 21 16 31 30 26 MIN. QFF PRESSURE IN HPA 996.6 1010.1 999.9 994.1 1000.5 996.0 992.6 991.5 999.7 1005.2 997.1 1005.0 991.5 DAY 18 24 12 6 11 15 9 13 7 5 27 24 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 868.6 864.4 862.2 861.0 863.6 861.5 859.9 859.6 864.7 870.0 866.7 870.1 864.4 MAX. QFE PRESSURE IN HPA 876.1 871.5 868.9 872.4 866.3 868.5 866.7 863.4 870.0 873.8 875.0 875.5 876.1 DAY 30 27 17 24 24 3 23 31 15 31 30 2 MIN. QFE PRESSURE IN HPA 846.5 856.5 853.3 850.6 860.0 857.5 854.9 855.0 858.8 861.5 851.2 856.1 846.5 DAY 18 9 12 9 11 27 9 13 7 5 27 24 MEAN QNH PRESSURE IN HPA 1017.3 1012.4 1010.0 1008.6 1011.6 1009.2 1007.3 1007.1 1012.8 1018.8 1015.1 1019.0 1012.4 MAX. QNH PRESSURE IN HPA 1025.8 1020.5 1017.6 1021.6 1014.6 1017.1 1015.1 1011.3 1018.8 1023.2 1024.5 1025.1 1025.8 DAY 30 27 17 24 24 3 23 31 15 31 30 2 MIN. QNH PRESSURE IN HPA 992.1 1003.5 999.8 996.8 1007.5 1004.6 1001.7 1001.8 1006.1 1009.2 997.5 1003.0 992.1 DAY 18 9 12 9 11 27 9 13 7 5 27 24 MEAN QFF PRESSURE IN HPA 1027.9 1017.1 1009.6 1007.0 1005.3 999.9 996.9 997.1 1004.8 1015.2 1013.5 1022.5 1009.7 MAX. QFF PRESSURE IN HPA 1038.9 1026.3 1017.6 1020.6 1009.7 1008.2 1005.8 1002.6 1012.1 1021.8 1029.8 1031.0 1038.9 DAY 13 21 17 24 2 3 23 31 17 31 30 26 MIN. QFF PRESSURE IN HPA 996.9 1008.1 999.2 993.4 1000.1 994.7 991.0 991.1 996.6 1003.1 998.2 1003.5 991.0 DAY 18 10 12 6 21 15 9 13 7 2 21 24 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 867.5 863.2 861.1 860.2 862.6 860.2 858.5 858.0 863.1 868.5 865.5 868.9 863.1 MAX. QFE PRESSURE IN HPA 874.8 870.8 867.8 871.0 865.2 866.7 864.8 862.3 869.0 872.8 874.0 874.4 874.8 DAY 10 16 17 24 23 3 22 24 15 31 30 2 MIN. QFE PRESSURE IN HPA 846.5 852.7 849.9 851.2 859.8 855.3 853.7 853.6 857.4 858.4 852.0 855.3 846.5 DAY 18 3 12 9 21 26 9 13 7 2 26 24 MEAN QNH PRESSURE IN HPA 1016.0 1011.1 1008.8 1007.7 1010.4 1007.7 1005.8 1005.2 1011.0 1017.2 1013.7 1017.6 1011.0 MAX. QNH PRESSURE IN HPA 1024.3 1019.7 1016.3 1020.0 1013.4 1015.1 1012.9 1010.1 1017.7 1022.0 1023.4 1023.8 1024.3 DAY 10 16 17 24 23 3 22 24 15 31 30 2 MIN. QNH PRESSURE IN HPA 992.1 999.2 996.0 997.5 1007.2 1002.1 1000.3 1000.2 1004.5 1005.7 998.4 1002.1 992.1 DAY 18 3 12 9 21 26 9 13 7 2 26 24 MEAN QFF PRESSURE IN HPA 1026.1 1015.8 1008.2 1005.9 1004.3 998.7 995.1 995.1 1003.1 1013.2 1012.1 1021.2 1008.2 MAX. QFF PRESSURE IN HPA 1037.7 1026.2 1016.3 1017.9 1008.0 1006.7 1002.7 1001.1 1010.6 1020.6 1026.9 1029.1 1037.7 DAY 13 16 17 23 2 3 23 24 16 31 29 27 MIN. QFF PRESSURE IN HPA 997.5 1003.6 994.9 995.5 999.8 992.2 989.9 989.6 995.6 999.1 999.2 1003.0 989.6 DAY 18 3 12 7 21 26 9 13 7 2 26 24 ======================================================================================================================= 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 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 868.0 863.5 861.2 860.0 862.1 859.5 857.6 857.4 862.8 868.5 865.7 869.0 862.9 MAX. QFE PRESSURE IN HPA 875.4 870.7 867.3 870.3 865.0 865.9 864.1 861.8 869.1 873.7 874.6 874.7 875.4 DAY 10 16 17 24 9 1 22 31 15 31 30 1 MIN. QFE PRESSURE IN HPA 848.5 852.5 850.8 852.0 858.8 854.4 853.3 853.2 857.3 857.9 850.8 856.7 848.5 DAY 18 3 12 9 21 26 8 17 7 2 26 24 MEAN QNH PRESSURE IN HPA 1016.5 1011.5 1008.8 1007.5 1009.9 1006.9 1004.7 1004.5 1010.6 1017.2 1014.0 1017.7 1010.8 MAX. QNH PRESSURE IN HPA 1025.0 1019.6 1015.8 1019.2 1013.2 1014.2 1012.1 1009.5 1017.8 1023.0 1024.1 1024.2 1025.0 DAY 10 16 17 24 9 1 22 31 15 31 30 1 MIN. QNH PRESSURE IN HPA 994.4 998.9 997.0 998.4 1006.1 1001.1 999.8 999.7 1004.4 1005.1 997.0 1003.7 994.4 DAY 18 3 12 9 21 26 8 17 7 2 26 24 MEAN QFF PRESSURE IN HPA 1028.6 1016.8 1008.9 1006.7 1004.5 998.4 994.6 995.2 1003.6 1014.7 1014.4 1022.3 1009.0 MAX. QFF PRESSURE IN HPA 1039.7 1027.2 1015.8 1018.5 1008.7 1006.6 1002.1 1001.6 1010.8 1022.7 1031.1 1031.6 1039.7 DAY 21 16 17 24 1 1 23 31 16 31 30 26 MIN. QFF PRESSURE IN HPA 1001.7 1003.3 996.4 997.0 999.6 991.8 989.8 989.1 996.0 999.6 998.7 1005.5 989.1 DAY 18 3 12 6 21 26 8 17 7 2 26 24 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 868.3 864.0 861.9 860.8 863.1 860.4 858.4 858.2 863.6 869.1 866.3 869.4 863.6 MAX. QFE PRESSURE IN HPA 875.1 871.2 867.4 870.5 866.2 867.4 865.5 862.4 870.4 873.8 875.6 875.2 875.6 DAY 21 16 17 23 31 3 22 31 15 25 30 1 MIN. QFE PRESSURE IN HPA 851.1 853.2 852.6 853.0 858.6 855.1 854.4 853.8 859.4 858.7 851.6 857.0 851.1 DAY 18 3 12 8 10 26 8 17 10 2 26 23 MEAN QNH PRESSURE IN HPA 1016.9 1012.0 1009.6 1008.4 1011.0 1007.9 1005.7 1005.4 1011.6 1017.8 1014.6 1018.2 1011.6 MAX. QNH PRESSURE IN HPA 1024.6 1020.2 1015.9 1019.4 1014.5 1015.9 1013.7 1010.2 1019.3 1023.2 1025.2 1024.7 1025.2 DAY 21 16 17 23 31 3 22 31 15 25 30 1 MIN. QNH PRESSURE IN HPA 997.3 999.7 999.1 999.5 1005.9 1001.9 1001.1 1000.4 1006.8 1006.0 997.9 1004.1 997.3 DAY 18 3 12 8 10 26 8 17 10 2 26 23 MEAN QFF PRESSURE IN HPA 1029.1 1017.5 1009.6 1007.1 1005.0 999.1 995.5 995.9 1004.4 1015.0 1014.8 1022.9 1009.7 MAX. QFF PRESSURE IN HPA 1039.7 1027.2 1018.0 1020.1 1009.8 1006.8 1004.3 1001.7 1012.8 1022.8 1032.0 1033.0 1039.7 DAY 21 16 8 23 1 1 22 31 15 31 30 26 MIN. QFF PRESSURE IN HPA 1002.6 1003.8 998.6 998.1 998.3 991.6 991.2 989.7 998.3 1000.9 999.3 1005.2 989.7 DAY 17 3 12 8 10 26 29 17 10 2 26 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 868.4 863.9 862.0 860.8 863.3 861.1 859.2 858.7 863.9 869.2 866.2 869.7 863.9 MAX. QFE PRESSURE IN HPA 874.8 870.6 867.0 871.0 866.3 867.7 866.1 862.8 870.6 873.9 875.6 875.2 875.6 DAY 10 16 8 23 9 3 22 20 15 25 30 1 MIN. QFE PRESSURE IN HPA 850.6 853.8 854.1 852.0 859.3 855.9 855.2 854.2 860.2 858.6 846.8 856.9 846.8 DAY 17 3 12 8 10 27 8 17 10 2 26 23 MEAN QNH PRESSURE IN HPA 1017.1 1011.9 1009.8 1008.4 1011.3 1008.7 1006.6 1006.0 1011.9 1018.0 1014.5 1018.5 1011.9 MAX. QNH PRESSURE IN HPA 1024.3 1019.5 1015.4 1020.0 1014.6 1016.2 1014.4 1010.7 1019.5 1023.3 1025.2 1024.7 1025.2 DAY 10 16 8 23 9 3 22 20 15 25 30 1 MIN. QNH PRESSURE IN HPA 996.8 1000.4 1000.8 998.4 1006.7 1002.8 1002.0 1000.9 1007.7 1005.9 992.5 1003.9 992.5 DAY 17 3 12 8 10 27 8 17 10 2 26 23 MEAN QFF PRESSURE IN HPA 1027.7 1016.6 1009.4 1006.8 1005.0 999.6 996.0 996.2 1004.1 1014.1 1013.4 1022.0 1009.2 MAX. QFF PRESSURE IN HPA 1037.7 1025.3 1017.8 1020.6 1010.0 1007.5 1004.7 1001.7 1012.4 1020.6 1030.0 1031.0 1037.7 DAY 12 20 8 23 1 1 22 31 15 29 30 26 MIN. QFF PRESSURE IN HPA 998.6 1004.9 1000.5 996.1 999.3 993.5 991.8 990.2 998.6 998.1 992.4 1004.2 990.2 DAY 17 3 12 8 10 26 8 17 10 2 26 23 ======================================================================================================================= 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 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.2 -2.1 6.2 9.5 16.6 20.9 23.6 24.5 19.0 10.7 6.8 2.9 11.2 MINIMUN AIR TEMPERATURE (C) -7.1 -6.9 0.4 3.6 8.9 13.5 16.6 17.1 12.2 6.3 1.3 -2.0 5.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 2 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 26 20 5 2 0 0 0 0 0 0 0 8 61 DAYS WITH FREEZING MIN.<= 0 31 28 12 8 0 0 0 0 0 3 10 25 117 TEMPERATURE RECORDS LOWEST(C) -14.0 -16.0 -9.0 -5.0 1.0 11.0 14.0 14.0 7.0 0.0 -2.0 -9.0 -16.0 DAY 18 4 14 5 4 19 6 31 30 27 30 21 MAXIMUM AIR TEMPERATURE (C) -0.7 3.1 12.7 15.7 23.9 28.0 30.8 32.8 26.9 15.9 13.8 9.1 17.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 7 21 29 8 0 0 0 65 DAYS WITH MAXIMUM TEMP. <= 0 19 6 0 0 0 0 0 0 0 0 0 0 25 TEMPERATURE RECORDS HIGHEST(C) 4.0 9.0 18.0 25.0 28.0 31.0 36.0 36.0 32.0 24.0 17.0 14.0 36.0 DAY 8 14 8 27 15 7 15 17 17 4 7 5 DIF. BETWEEN (MAX.-MIN.) (C) 6.4 10.0 12.3 12.1 15.0 14.5 14.2 15.7 14.7 9.6 12.5 11.1 12.4 MEAN DAILY TEMP. (MDT) (C) -3.9 -1.9 6.5 9.6 16.4 20.7 23.7 25.0 19.5 11.1 7.6 3.5 11.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 11.5 84.5 122.5 11.0 0.0 0.0 0.0 229.5 HEATING DEG. DAYS(BASE 18 0C) 679.0 557.0 355.0 251.5 62.5 0.0 0.0 0.0 15.5 214.5 312.5 448.0 2895.5 DEWPOINT (MEAN C) -6.9 -6.7 -1.0 -0.0 2.8 7.9 11.7 10.2 6.9 5.5 0.6 -2.5 2.4 MIXING RATIO (G/KG) 2.71 2.82 4.23 4.60 5.71 7.96 10.23 9.31 7.37 6.80 4.69 3.76 5.85 VAPOUR PRESSURE (HPA) 3.74 3.89 5.84 6.32 7.84 10.89 13.91 12.72 10.12 9.35 6.49 5.20 8.03 SATURATION DEF. (HPA) 0.80 1.67 4.19 6.42 12.07 14.73 16.40 19.48 13.02 4.07 3.79 2.64 8.27 RELATIVE HUMIDITY (MEAN %) 82 71 63 54 43 46 49 43 48 72 66 69 59 RELATIVE HUMIDITY (MAX. %) 88 82 81 73 63 66 66 58 64 86 81 81 74 RELATIVE HUMIDITY (MIN. %) 73 59 45 36 25 29 33 27 33 57 47 54 43 RELATIVE HUMIDITY (MEAN% 03UTC) 85 74 74 66 61 65 65 57 62 83 78 77 71 RELATIVE HUMIDITY (MEAN% 09UTC) 80 64 51 46 32 38 40 35 39 62 52 60 50 RELATIVE HUMIDITY (MEAN% 15UTC) 82 72 57 45 31 31 36 32 40 69 65 68 52 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 91.0 22.3 26.4 26.0 5.2 14.3 8.0 7.7 17.0 95.6 5.4 2.9 321.8 DAYS WITH PRECIPITATION >=10 4 1 0 0 0 0 0 0 0 3 0 0 8 DAYS WITH PRECIPITATION >= 5 6 2 2 2 0 1 1 1 1 6 0 0 22 DAYS WITH PRECIPITATION >= 1 10 4 7 7 3 5 1 1 5 13 2 2 60 DAYS WITH PRECIPITATION 16 7 11 14 5 7 1 7 6 17 5 4 100 GREATEST DAILY PRECIPITATION 29.0 10.0 9.0 7.0 3.0 8.0 8.0 7.0 8.0 30.0 4.0 1.0 30.0 DAY 9 23 2 19 25 7 5 10 29 22 18 17 DAY WITH THUNDER STORM 0 0 0 0 4 5 2 1 4 0 0 1 17 DAYS WITH SNOW OR SLEET 14 7 1 3 0 0 0 0 0 1 0 1 27 DAYS WITH DUST 0 0 1 1 5 3 0 2 1 0 2 1 16 WIND DIRECTION (PREVAILING) 270 180 180 180 180 360 360 90 45 270 180 225 180 PREVAILING WIND SPEED(KNOTS) 3.1 6.3 9.4 7.9 7.5 3.9 3.7 3.9 2.9 3.0 8.1 3.1 7.0 PREVAILING WIND PERCENT 5.7 16.1 13.7 24.3 15.3 10.0 11.7 13.4 7.1 8.9 12.5 10.5 10.1 CALMS PERCENT OF WIND 84.2 48.9 57.3 40.2 44.8 47.5 53.6 45.3 65.0 62.5 65.8 67.2 56.9 NO. OF WIND OBSERVATION 247 223 248 239 248 240 248 247 240 248 240 247 2915 VECTOR WIND DIRECTION (MEAN) 236 204 188 193 184 296 25 17 294 240 190 189 196 VECTOR WIND MAGNITUDE(KNOTS) 0.2 1.4 1.3 2.5 1.1 0.2 0.6 0.2 0.1 0.4 1.2 0.9 0.7 WIND STEADINESES (MEAN %) 40.0 60.9 54.2 69.4 39.3 9.5 37.5 9.1 9.1 33.3 66.7 64.3 36.8 WIND SPEED (MEAN KNOTS) 0.5 2.3 2.4 3.6 2.8 2.1 1.6 2.2 1.1 1.2 1.8 1.4 1.9 FASTEST WIND DIRECTION 330 180 210 250 180 250 180 180 180 180 180 160 210 FASTEST WIND SPEED (KNOTS) 6 22 30 25 16 16 9 12 20 9 28 22 30 DAY 7 9 10 6 10 14 13 1 18 12 17 27 DAYS WITH SKY CLEAR (0-2)/8 0 8 11 8 17 26 29 25 25 5 19 15 188 DAYS WITH P.CLOUDY (3-6)/8 5 12 15 13 12 4 2 6 4 10 9 11 103 DAYS WITH CLOUDY (7-8)/8 26 8 5 9 2 0 0 0 1 16 2 5 74 DAYS WITH VISIBILITY =< 2 KM 10 1 0 0 0 0 0 0 0 1 0 0 12 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 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 864.2 862.7 864.3 860.7 863.5 862.5 860.4 862.7 865.4 865.6 867.2 866.3 863.8 MAX. QFE PRESSURE IN HPA 874.2 873.8 874.3 869.5 873.2 869.4 865.6 870.2 871.0 872.8 873.0 874.2 874.3 DAY-HOUR 31- 9 1- 6 16- 6 25- 6 20- 6 2- 6 16- 6 9- 6 30-18 28- 6 29- 6 22- 6 MIN. QFE PRESSURE IN HPA 848.3 846.4 852.6 846.5 855.7 854.8 852.1 857.1 858.8 852.3 854.6 856.5 846.4 DAY-HOUR 8-18 23- 0 23-12 3-18 1-15 24-15 11-15 24-12 18-12 24-15 17-12 17-12 MEAN QNH PRESSURE IN HPA 1012.2 1010.6 1012.4 1008.3 1011.4 1010.3 1008.0 1010.6 1013.6 1013.9 1015.7 1014.6 1011.8 MAX. QNH PRESSURE IN HPA 1023.6 1023.2 1023.7 1018.3 1022.5 1018.2 1013.8 1019.1 1020.0 1022.0 1022.3 1023.6 1023.7 DAY-HOUR 31- 9 1- 6 16- 6 25- 6 20- 6 2- 6 16- 6 9- 6 30-18 28- 6 29- 6 22- 6 MIN. QNH PRESSURE IN HPA 994.2 992.0 999.1 992.1 1002.6 1001.6 998.5 1004.2 1006.1 998.7 1001.3 1003.5 992.0 DAY-HOUR 8-18 23- 0 23-12 3-18 1-15 24-15 11-15 24-12 18-12 24-15 17-12 17-12 MEAN QFF PRESSURE IN HPA 1018.3 1015.4 1012.3 1006.2 1005.6 1002.0 998.0 1000.3 1006.3 1011.0 1015.3 1016.5 1008.9 MAX. QFF PRESSURE IN HPA 1030.7 1033.5 1027.8 1019.5 1017.7 1010.0 1004.8 1011.8 1016.5 1024.7 1024.8 1030.2 1033.5 DAY-HOUR 31-18 1- 6 16- 6 9- 6 4- 6 2- 3 1- 6 9- 6 30-18 28- 6 29- 6 22- 6 MIN. QFF PRESSURE IN HPA 996.9 994.2 998.1 992.4 997.5 992.5 988.9 993.3 996.7 995.6 997.3 1001.8 988.9 DAY-HOUR 8-21 9- 6 23-15 3-15 1-12 24-15 11-15 24-12 18-12 24-15 17-12 14- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 864.1 862.8 864.4 860.8 863.6 862.9 860.8 863.0 865.5 865.7 867.4 866.5 863.9 MAX. QFE PRESSURE IN HPA 873.2 873.6 872.8 868.3 871.4 868.8 864.4 869.7 868.7 871.9 872.3 873.7 873.7 DAY 31 1 15 10 20 3 17 9 30 5 29 22 MIN. QFE PRESSURE IN HPA 849.4 846.4 854.6 846.5 856.9 857.2 855.6 859.6 862.0 853.7 858.2 858.5 846.4 DAY 9 23 23 4 2 18 12 24 18 25 17 27 MEAN QNH PRESSURE IN HPA 1012.2 1010.6 1012.5 1008.4 1011.5 1010.7 1008.4 1010.8 1013.7 1013.9 1015.8 1014.8 1012.0 MAX. QNH PRESSURE IN HPA 1022.5 1022.9 1022.0 1016.9 1020.4 1017.5 1012.5 1018.5 1017.4 1021.0 1021.5 1023.0 1023.0 DAY 31 1 15 10 20 3 17 9 30 5 29 22 MIN. QNH PRESSURE IN HPA 995.4 992.0 1001.3 992.1 1003.9 1004.3 1002.5 1007.0 1009.7 1000.3 1005.4 1005.8 992.0 DAY 9 23 23 4 2 18 12 24 18 25 17 27 MEAN QFF PRESSURE IN HPA 1018.0 1015.0 1012.1 1006.0 1005.5 1002.3 998.2 1000.2 1005.9 1010.8 1014.9 1016.2 1008.7 MAX. QFF PRESSURE IN HPA 1026.9 1030.6 1026.1 1017.3 1014.6 1009.2 1003.2 1010.3 1014.5 1023.4 1022.4 1027.9 1030.6 DAY 18 1 15 10 20 3 6 9 30 28 29 22 MIN. QFF PRESSURE IN HPA 999.3 994.3 998.2 993.3 998.3 995.8 993.3 996.5 1000.3 998.2 1000.6 1004.5 993.3 DAY 9 23 23 4 2 15 21 5 18 25 17 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 864.1 862.8 864.5 860.9 864.0 863.3 861.3 863.3 865.9 865.8 867.4 866.4 864.1 MAX. QFE PRESSURE IN HPA 873.2 873.4 873.1 868.3 872.1 869.0 865.0 869.7 869.1 872.7 872.3 873.7 873.7 DAY 31 1 16 10 20 3 17 9 15 28 5 22 MIN. QFE PRESSURE IN HPA 850.4 846.9 854.4 846.5 856.8 857.7 855.6 859.6 861.9 854.7 857.0 857.6 846.5 DAY 9 9 23 4 2 18 11 24 18 25 17 17 MEAN QNH PRESSURE IN HPA 1012.1 1010.6 1012.6 1008.5 1012.0 1011.2 1009.0 1011.2 1014.2 1014.0 1015.8 1014.7 1012.2 MAX. QNH PRESSURE IN HPA 1022.5 1022.7 1022.4 1016.9 1021.2 1017.7 1013.2 1018.5 1017.8 1021.9 1021.5 1023.0 1023.0 DAY 31 1 16 10 20 3 17 9 15 28 5 22 MIN. QNH PRESSURE IN HPA 996.6 992.6 1001.1 992.1 1003.8 1004.9 1002.5 1007.0 1009.6 1001.4 1004.1 1004.7 992.1 DAY 9 9 23 4 2 18 11 24 18 25 17 17 MEAN QFF PRESSURE IN HPA 1018.5 1016.0 1012.9 1006.9 1006.7 1003.2 999.3 1001.4 1007.4 1011.7 1016.1 1017.0 1009.8 MAX. QFF PRESSURE IN HPA 1028.5 1031.8 1026.8 1018.5 1017.6 1010.0 1004.3 1010.9 1014.7 1024.5 1023.8 1029.1 1031.8 DAY 18 1 16 9 4 2 6 9 30 28 29 22 MIN. QFF PRESSURE IN HPA 1000.9 994.8 998.2 993.8 999.2 996.5 992.6 997.4 1001.4 999.5 1000.8 1003.2 992.6 DAY 9 9 23 4 2 17 11 6 18 24 17 14 ======================================================================================================================= 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 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 864.8 863.3 865.2 861.5 864.5 863.7 861.9 863.9 866.6 866.5 868.1 867.2 864.8 MAX. QFE PRESSURE IN HPA 873.8 873.8 874.3 869.5 873.2 869.4 865.6 870.2 870.4 872.8 873.0 874.2 874.3 DAY 31 1 16 25 20 2 16 9 15 28 29 22 MIN. QFE PRESSURE IN HPA 852.2 846.7 853.9 847.7 857.3 857.9 856.4 859.8 862.1 855.7 857.2 858.5 846.7 DAY 9 9 23 4 2 15 11 24 18 24 17 17 MEAN QNH PRESSURE IN HPA 1012.9 1011.3 1013.4 1009.1 1012.6 1011.7 1009.6 1011.9 1015.0 1014.9 1016.7 1015.6 1012.9 MAX. QNH PRESSURE IN HPA 1023.2 1023.2 1023.7 1018.3 1022.5 1018.2 1013.8 1019.1 1019.3 1022.0 1022.3 1023.6 1023.7 DAY 31 1 16 25 20 2 16 9 15 28 29 22 MIN. QNH PRESSURE IN HPA 998.6 992.3 1000.5 993.5 1004.4 1005.1 1003.4 1007.2 1009.9 1002.6 1004.3 1005.8 992.3 DAY 9 9 23 4 2 15 11 24 18 24 17 17 MEAN QFF PRESSURE IN HPA 1019.3 1016.8 1013.7 1007.2 1006.8 1003.3 999.9 1001.8 1007.9 1012.3 1016.9 1018.2 1010.3 MAX. QFF PRESSURE IN HPA 1029.2 1033.5 1027.8 1019.5 1017.7 1009.7 1004.8 1011.8 1015.3 1024.7 1024.8 1030.2 1033.5 DAY 18 1 16 9 4 3 1 9 30 28 29 22 MIN. QFF PRESSURE IN HPA 1003.2 994.2 999.0 995.1 999.9 995.4 994.1 997.0 1000.7 999.7 1000.3 1003.3 994.1 DAY 9 9 23 19 2 15 11 30 18 24 17 14 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 864.7 863.4 864.8 861.1 863.9 863.1 861.2 863.4 866.1 866.2 867.7 866.8 864.4 MAX. QFE PRESSURE IN HPA 874.2 873.5 873.4 869.4 871.9 868.8 865.4 869.7 869.7 872.6 872.5 873.5 874.2 DAY 31 1 14 9 19 2 16 9 15 28 28 22 MIN. QFE PRESSURE IN HPA 852.0 849.8 853.1 849.5 857.1 857.0 855.3 858.9 860.4 854.1 856.5 857.0 849.5 DAY 9 9 23 4 3 17 11 24 18 24 17 17 MEAN QNH PRESSURE IN HPA 1012.8 1011.3 1013.0 1008.7 1011.9 1011.0 1008.8 1011.4 1014.4 1014.5 1016.3 1015.2 1012.4 MAX. QNH PRESSURE IN HPA 1023.6 1022.8 1022.7 1018.2 1021.0 1017.5 1013.6 1018.5 1018.5 1021.8 1021.7 1022.8 1023.6 DAY 31 1 14 9 19 2 16 9 15 28 28 22 MIN. QNH PRESSURE IN HPA 998.4 995.9 999.6 995.5 1004.2 1004.1 1002.1 1006.2 1007.9 1000.8 1003.5 1004.1 995.5 DAY 9 9 23 4 3 17 11 24 18 24 17 17 MEAN QFF PRESSURE IN HPA 1018.7 1015.2 1012.5 1006.4 1005.8 1002.4 998.7 1000.7 1006.7 1011.2 1015.3 1016.6 1009.2 MAX. QFF PRESSURE IN HPA 1028.8 1030.2 1026.9 1019.1 1016.2 1009.5 1004.2 1010.8 1014.8 1023.3 1023.0 1027.6 1030.2 DAY 22 2 14 9 19 2 1 9 30 28 28 22 MIN. QFF PRESSURE IN HPA 1001.5 997.3 998.7 994.3 998.8 995.2 992.4 995.9 998.6 996.8 1000.2 1001.8 992.4 DAY 8 9 23 19 11 17 11 24 18 24 17 14 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 863.6 862.2 863.6 860.1 862.7 861.7 859.6 861.9 864.5 865.0 866.3 865.5 863.1 MAX. QFE PRESSURE IN HPA 873.0 872.3 872.2 868.3 871.4 867.2 864.8 868.0 868.7 871.9 871.2 872.1 873.0 DAY 31 1 14 9 19 3 16 9 30 28 28 22 MIN. QFE PRESSURE IN HPA 849.3 852.0 852.6 849.1 856.2 855.9 852.7 857.1 858.8 853.4 854.6 856.5 849.1 DAY 8 9 23 3 1 24 11 24 18 24 17 17 MEAN QNH PRESSURE IN HPA 1011.6 1010.0 1011.6 1007.6 1010.5 1009.4 1007.0 1009.6 1012.6 1013.2 1014.7 1013.7 1010.9 MAX. QNH PRESSURE IN HPA 1022.3 1021.5 1021.3 1016.9 1020.4 1015.7 1012.9 1016.6 1017.4 1021.0 1020.2 1021.2 1022.3 DAY 31 1 14 9 19 3 16 9 30 28 28 22 MIN. QNH PRESSURE IN HPA 995.3 998.4 999.1 995.1 1003.2 1002.8 999.2 1004.2 1006.1 1000.0 1001.3 1003.5 995.1 DAY 8 9 23 3 1 24 11 24 18 24 17 17 MEAN QFF PRESSURE IN HPA 1017.3 1014.2 1011.0 1005.2 1004.4 1000.8 996.7 998.9 1004.8 1009.9 1013.5 1014.9 1007.6 MAX. QFF PRESSURE IN HPA 1027.4 1030.3 1025.5 1017.1 1015.7 1007.3 1001.8 1008.3 1014.0 1022.5 1021.1 1026.0 1030.3 DAY 22 1 14 9 4 2 6 9 30 28 28 22 MIN. QFF PRESSURE IN HPA 998.1 1000.2 998.1 994.8 997.5 993.5 989.2 993.3 996.7 996.1 997.3 1002.5 989.2 DAY 8 9 23 3 1 24 11 24 18 24 17 14 ======================================================================================================================= 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 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 863.8 862.3 863.6 859.9 862.4 861.1 858.7 861.3 864.3 864.9 866.5 865.7 862.9 MAX. QFE PRESSURE IN HPA 873.0 872.2 871.7 867.5 870.0 866.4 863.6 867.0 869.2 871.9 871.0 872.2 873.0 DAY 31 1 14 9 19 2 16 8 30 28 4 21 MIN. QFE PRESSURE IN HPA 848.6 850.9 852.7 846.8 855.7 854.8 852.1 857.1 859.4 852.3 855.1 856.6 846.8 DAY 8 22 23 3 1 24 11 24 18 24 17 17 MEAN QNH PRESSURE IN HPA 1011.8 1010.1 1011.5 1007.4 1010.2 1008.7 1005.9 1009.0 1012.3 1013.0 1014.9 1014.0 1010.7 MAX. QNH PRESSURE IN HPA 1022.3 1021.3 1020.8 1016.0 1018.8 1014.7 1011.6 1015.4 1017.9 1021.0 1020.0 1021.3 1022.3 DAY 31 1 14 9 19 2 16 8 30 28 4 21 MIN. QNH PRESSURE IN HPA 994.5 997.1 999.2 992.5 1002.6 1001.6 998.5 1004.2 1006.8 998.7 1001.9 1003.6 992.5 DAY 8 22 23 3 1 24 11 24 18 24 17 17 MEAN QFF PRESSURE IN HPA 1018.2 1015.3 1011.7 1005.7 1004.8 1000.7 996.1 999.0 1005.5 1010.7 1015.0 1016.2 1008.2 MAX. QFF PRESSURE IN HPA 1028.1 1031.0 1025.3 1017.3 1015.8 1007.1 1001.3 1006.5 1015.3 1022.9 1022.2 1027.5 1031.0 DAY 31 1 14 9 4 2 6 8 30 28 28 21 MIN. QFF PRESSURE IN HPA 998.1 1000.7 998.1 992.4 998.2 992.5 988.9 994.7 998.6 995.6 999.3 1004.2 988.9 DAY 8 22 23 3 1 24 11 24 18 24 17 14 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 864.3 862.6 864.2 860.7 863.2 861.9 859.7 862.2 865.0 865.4 867.2 866.2 863.5 MAX. QFE PRESSURE IN HPA 873.9 872.5 872.6 868.5 870.2 867.2 864.2 868.0 871.0 872.4 871.7 872.6 873.9 DAY 31 1 14 9 19 2 16 8 30 28 4 21 MIN. QFE PRESSURE IN HPA 848.3 850.3 854.6 846.5 857.0 855.8 854.0 858.6 861.0 853.7 858.1 858.2 846.5 DAY 8 22 23 3 2 24 11 24 18 24 17 17 MEAN QNH PRESSURE IN HPA 1012.4 1010.4 1012.2 1008.3 1011.1 1009.6 1007.1 1010.0 1013.2 1013.6 1015.6 1014.5 1011.5 MAX. QNH PRESSURE IN HPA 1023.3 1021.7 1021.8 1017.1 1019.1 1015.7 1012.2 1016.6 1020.0 1021.6 1020.8 1021.8 1023.3 DAY 31 1 14 9 19 2 16 8 30 28 4 21 MIN. QNH PRESSURE IN HPA 994.2 996.4 1001.3 992.1 1004.1 1002.7 1000.6 1005.9 1008.6 1000.3 1005.3 1005.4 992.1 DAY 8 22 23 3 2 24 11 24 18 24 17 17 MEAN QFF PRESSURE IN HPA 1018.9 1015.7 1012.5 1006.4 1005.2 1001.2 997.4 1000.0 1006.3 1011.1 1015.7 1017.1 1009.0 MAX. QFF PRESSURE IN HPA 1030.7 1031.6 1026.0 1019.0 1014.7 1007.7 1001.9 1008.6 1016.5 1024.5 1023.1 1028.6 1031.6 DAY 31 1 14 9 4 2 5 8 30 28 28 21 MIN. QFF PRESSURE IN HPA 997.2 999.7 1000.8 992.6 999.5 994.2 991.8 995.9 1000.4 998.0 1002.8 1004.8 991.8 DAY 8 22 23 3 1 24 11 24 18 24 17 13 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 864.1 862.6 864.3 861.0 863.9 862.5 860.4 862.8 865.4 865.6 867.4 866.3 863.9 MAX. QFE PRESSURE IN HPA 873.2 872.9 872.8 868.5 871.0 868.8 864.3 869.7 871.0 872.4 872.0 873.2 873.2 DAY 30 1 14 9 19 2 16 8 30 28 4 21 MIN. QFE PRESSURE IN HPA 848.4 848.8 855.1 846.5 857.2 857.2 855.4 859.6 862.2 853.7 858.8 858.6 846.5 DAY 8 22 23 3 1 17 10 30 18 24 16 27 MEAN QNH PRESSURE IN HPA 1012.2 1010.4 1012.4 1008.6 1011.9 1010.3 1007.9 1010.7 1013.6 1013.9 1015.9 1014.6 1011.9 MAX. QNH PRESSURE IN HPA 1022.5 1022.1 1022.0 1017.1 1020.0 1017.5 1012.4 1018.5 1020.0 1021.6 1021.1 1022.5 1022.5 DAY 30 1 14 9 19 2 16 8 30 28 4 21 MIN. QNH PRESSURE IN HPA 994.3 994.7 1001.9 992.1 1004.3 1004.3 1002.2 1007.0 1010.0 1000.3 1006.1 1005.9 992.1 DAY 8 22 23 3 1 17 10 30 18 24 16 27 MEAN QFF PRESSURE IN HPA 1018.1 1014.9 1011.9 1006.3 1005.6 1001.8 997.8 1000.2 1006.1 1010.7 1015.0 1016.1 1008.7 MAX. QFF PRESSURE IN HPA 1027.6 1030.5 1026.1 1018.1 1014.5 1009.4 1003.4 1010.7 1016.1 1023.0 1022.5 1027.5 1030.5 DAY 22 1 14 9 19 2 5 8 30 28 28 21 MIN. QFF PRESSURE IN HPA 996.9 996.7 999.6 993.7 999.0 995.9 992.5 995.5 1001.1 997.7 1002.1 1004.6 992.5 DAY 8 8 22 3 1 17 10 17 17 24 16 13 ======================================================================================================================= 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 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.9 ***** ***** 12.5 17.0 23.3 25.9 26.5 20.7 13.0 9.1 3.7 ***** MINIMUN AIR TEMPERATURE (C) 0.2 ***** ***** 6.6 10.7 14.9 18.5 19.0 14.3 8.8 4.4 0.2 ***** DAYS WITH MINIMUM TEMP. >=21 0 **** **** 0 0 0 4 5 0 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 0 **** **** 0 0 0 0 0 0 0 0 2 **** DAYS WITH FREEZING MIN.<= 0 15 **** **** 0 0 0 0 0 0 0 1 23 **** TEMPERATURE RECORDS LOWEST(C) -3.0 ***** ***** 2.0 6.0 10.0 15.0 17.0 10.0 6.0 0.0 -5.0 ***** DAY 14 ** ** 1 5 15 6 7 28 18 30 23 MAXIMUM AIR TEMPERATURE (C) 9.5 ***** ***** 18.3 23.4 30.6 33.4 33.9 27.4 19.2 16.4 9.7 ***** DAYS WITH MAXIMUM TEMP. >=30 0 **** **** 0 0 19 28 31 7 0 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 0 **** **** 0 0 0 0 0 0 0 0 0 **** TEMPERATURE RECORDS HIGHEST(C) 16.0 ***** ***** 26.0 27.0 35.0 38.0 38.0 34.0 25.0 21.0 15.0 ***** DAY 6 ** ** 30 13 7 26 3 6 5 1 8 DIF. BETWEEN (MAX.-MIN.) (C) 9.3 ***** ***** 11.7 12.7 15.7 14.9 14.9 13.1 10.4 12.0 9.5 ***** MEAN DAILY TEMP. (MDT) (C) 4.9 ***** ***** 12.5 17.0 22.7 25.9 26.4 20.9 14.0 10.4 5.0 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 ****** ****** 0.0 0.0 58.0 153.0 168.5 36.0 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 356.5 ****** ****** 166.0 46.0 0.0 0.0 0.0 9.0 124.0 227.0 404.5 ****** DEWPOINT (MEAN C) -1.1 ***** ***** 3.3 5.3 7.4 10.3 10.5 8.7 8.1 4.1 -1.6 ***** MIXING RATIO (G/KG) 4.19 ****** ****** 5.73 6.60 7.73 9.40 9.49 8.30 7.90 5.95 3.99 ****** VAPOUR PRESSURE (HPA) 5.79 ****** ****** 7.88 9.08 10.57 12.80 12.93 11.39 10.89 8.26 5.52 ****** SATURATION DEF. (HPA) 2.55 ****** ****** 7.13 11.12 19.36 22.15 23.13 14.18 4.59 3.73 2.71 ****** RELATIVE HUMIDITY (MEAN %) 72 *** *** 57 49 39 40 39 49 74 72 70 *** RELATIVE HUMIDITY (MAX. %) 82 *** *** 75 69 58 57 56 67 89 87 86 *** RELATIVE HUMIDITY (MIN. %) 56 *** *** 39 32 24 25 24 33 55 52 51 *** RELATIVE HUMIDITY (MEAN% 03UTC) 78 *** *** 75 66 56 56 54 64 86 84 80 *** RELATIVE HUMIDITY (MEAN% 09UTC) 64 *** *** 48 37 31 31 31 40 60 58 60 *** RELATIVE HUMIDITY (MEAN% 15UTC) 70 *** *** 45 38 28 29 28 40 68 66 66 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 45.9 72.4 49.8 41.4 10.1 0.0 1.0 0.0 7.3 113.8 0.0 19.0 360.7 DAYS WITH PRECIPITATION >=10 1 3 3 1 0 0 0 0 0 4 0 1 13 DAYS WITH PRECIPITATION >= 5 2 4 4 3 0 0 0 0 0 5 0 2 20 DAYS WITH PRECIPITATION >= 1 7 6 6 7 2 0 1 0 2 10 0 3 44 DAYS WITH PRECIPITATION 8 7 11 12 16 0 3 1 5 12 0 8 83 GREATEST DAILY PRECIPITATION 26.0 22.0 19.0 21.0 4.0 0.0 1.0 0.0 4.3 36.0 0.0 12.0 36.0 DAY 30 14 1 13 4 ** 18 ** 21 9 ** 26 DAY WITH THUNDER STORM 1 0 0 1 5 0 1 0 5 3 0 0 16 DAYS WITH SNOW OR SLEET 2 3 2 0 0 0 0 0 0 0 0 3 10 DAYS WITH DUST 0 0 0 0 2 1 0 0 2 0 0 0 5 WIND DIRECTION (PREVAILING) 270 180 315 225 225 225 45 225 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 3.7 11.3 6.6 6.3 7.6 7.1 4.5 4.0 5.3 2.5 2.7 3.5 4.8 PREVAILING WIND PERCENT 6.5 1.3 2.8 17.5 15.8 16.4 12.9 14.6 23.8 12.9 16.3 21.1 13.2 CALMS PERCENT OF WIND 79.7 98.2 93.9 26.3 32.0 35.3 36.7 33.2 20.9 61.3 60.0 48.2 51.9 NO. OF WIND OBSERVATION 246 224 246 240 247 238 248 247 239 248 240 247 2910 VECTOR WIND DIRECTION (MEAN) 219 182 293 186 186 151 6 105 213 186 173 181 184 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.2 0.2 1.3 1.2 0.6 0.4 0.5 0.9 0.1 0.5 1.2 0.5 WIND STEADINESES (MEAN %) 62.5 100.0 66.7 34.2 30.0 17.1 14.3 16.7 23.7 9.1 41.7 57.1 22.7 WIND SPEED (MEAN KNOTS) 0.8 0.2 0.3 3.8 4.0 3.5 2.8 3.0 3.8 1.1 1.2 2.1 2.2 FASTEST WIND DIRECTION 180 180 300 250 180 250 240 270 210 90 210 180 180 FASTEST WIND SPEED (KNOTS) 17 15 21 18 25 18 14 20 20 8 7 18 25 DAY 3 17 31 9 16 12 5 3 25 27 30 17 DAYS WITH SKY CLEAR (0-2)/8 9 12 14 9 13 29 29 29 16 14 14 9 197 DAYS WITH P.CLOUDY (3-6)/8 15 5 12 9 14 1 2 2 14 10 14 17 115 DAYS WITH CLOUDY (7-8)/8 7 11 5 12 4 0 0 0 0 7 2 5 53 DAYS WITH VISIBILITY =< 2 KM 1 2 1 0 0 2 0 0 0 0 0 0 6 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** 272.2 384.4 353.3 362.0 260.9 195.7 191.1 139.5 ****** ======================================================================================================================= 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 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 866.1 ****** ****** 863.4 864.5 861.8 860.5 860.8 864.9 868.4 872.5 865.7 ****** MAX. QFE PRESSURE IN HPA 873.0 ****** ****** 871.9 870.5 868.7 867.1 864.8 869.8 873.1 878.5 875.5 ****** DAY-HOUR 1- 0 **-** **-** 26- 9 18- 6 6- 6 8- 6 17- 6 21-21 9- 9 23- 6 23- 6 MIN. QFE PRESSURE IN HPA 855.0 ****** ****** 854.3 856.6 855.5 853.6 855.0 858.6 861.6 863.1 852.8 ****** DAY-HOUR 26-15 **-** **-** 13-12 16- 0 13-15 16-15 4-15 8-15 15-15 30-12 18- 3 MEAN QNH PRESSURE IN HPA 1014.4 ****** ****** 1011.4 1012.6 1009.5 1008.1 1008.4 1013.0 1017.0 1021.6 1013.9 ****** MAX. QNH PRESSURE IN HPA 1022.3 ****** ****** 1021.0 1019.4 1017.4 1015.5 1012.9 1018.6 1022.4 1028.5 1025.1 ****** DAY-HOUR 1- 0 **-** **-** 26- 9 18- 6 6- 6 8- 6 17- 6 21-21 9- 9 23- 6 23- 6 MIN. QNH PRESSURE IN HPA 1001.8 ****** ****** 1001.0 1003.6 1002.4 1000.2 1001.8 1005.9 1009.3 1011.0 999.3 ****** DAY-HOUR 26-15 **-** **-** 13-12 16- 0 13-15 16-15 4-15 8-15 15-15 30-12 18- 3 MEAN QFF PRESSURE IN HPA 1015.6 ****** ****** 1007.7 1006.4 999.9 997.1 997.0 1004.8 1012.9 1020.0 1015.2 ****** MAX. QFF PRESSURE IN HPA 1024.5 ****** ****** 1018.6 1015.0 1006.9 1007.5 1002.2 1011.5 1020.4 1029.3 1030.2 ****** DAY-HOUR 1- 6 **-** **-** 1- 3 18- 6 4- 3 8- 3 6- 6 21-21 9- 9 23- 6 23- 6 MIN. QFF PRESSURE IN HPA 1002.0 ****** ****** 997.7 996.8 992.7 989.6 990.0 994.2 1004.9 1010.2 999.7 ****** DAY-HOUR 26-15 **-** **-** 13-12 16- 0 13- 6 16-15 4-12 8-12 15-21 30-21 18- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 866.2 ****** ****** 863.5 864.6 862.1 860.9 861.0 865.2 868.4 872.6 865.6 ****** MAX. QFE PRESSURE IN HPA 873.0 ****** ****** 871.3 869.4 867.6 867.0 863.6 868.8 872.5 877.6 874.2 ****** DAY 1 ** ** 26 10 6 8 16 22 18 23 23 MIN. QFE PRESSURE IN HPA 857.8 ****** ****** 856.5 856.6 856.6 855.6 856.7 859.7 863.6 866.7 853.8 ****** DAY 27 ** ** 13 16 13 5 4 11 26 30 18 MEAN QNH PRESSURE IN HPA 1014.5 ****** ****** 1011.5 1012.7 1009.9 1008.4 1008.6 1013.4 1017.1 1021.8 1013.9 ****** MAX. QNH PRESSURE IN HPA 1022.3 ****** ****** 1020.3 1018.2 1016.1 1015.4 1011.6 1017.5 1021.7 1027.5 1023.6 ****** DAY 1 ** ** 26 10 6 8 16 22 18 23 23 MIN. QNH PRESSURE IN HPA 1005.0 ****** ****** 1003.5 1003.6 1003.6 1002.5 1003.7 1007.1 1011.6 1015.1 1000.4 ****** DAY 27 ** ** 13 16 13 5 4 11 26 30 18 MEAN QFF PRESSURE IN HPA 1015.1 ****** ****** 1007.6 1006.5 1000.5 997.4 997.0 1004.9 1012.6 1019.5 1014.6 ****** MAX. QFF PRESSURE IN HPA 1022.4 ****** ****** 1018.0 1013.6 1005.5 1007.0 1001.1 1011.1 1018.7 1026.1 1027.3 ****** DAY 1 ** ** 5 10 6 8 7 28 18 23 23 MIN. QFF PRESSURE IN HPA 1003.8 ****** ****** 1000.2 996.8 993.8 990.8 990.7 996.6 1007.1 1012.6 999.8 ****** DAY 27 ** ** 17 16 13 5 4 9 16 17 18 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.1 ****** ****** 863.7 864.8 862.7 861.3 861.5 865.3 868.4 872.7 865.6 ****** MAX. QFE PRESSURE IN HPA 872.4 ****** ****** 871.3 869.8 868.3 867.0 863.8 869.1 872.5 877.8 874.4 ****** DAY 1 ** ** 26 10 7 8 16 21 18 23 23 MIN. QFE PRESSURE IN HPA 858.3 ****** ****** 855.5 857.3 856.1 855.6 856.9 860.4 863.6 865.7 852.8 ****** DAY 3 ** ** 13 4 13 5 4 8 26 30 18 MEAN QNH PRESSURE IN HPA 1014.4 ****** ****** 1011.7 1012.9 1010.5 1009.0 1009.2 1013.5 1017.1 1021.9 1013.8 ****** MAX. QNH PRESSURE IN HPA 1021.6 ****** ****** 1020.3 1018.6 1016.9 1015.4 1011.8 1017.8 1021.7 1027.7 1023.8 ****** DAY 1 ** ** 26 10 7 8 16 21 18 23 23 MIN. QNH PRESSURE IN HPA 1005.5 ****** ****** 1002.4 1004.4 1003.0 1002.5 1003.9 1007.9 1011.6 1014.0 999.3 ****** DAY 3 ** ** 13 4 13 5 4 8 26 30 18 MEAN QFF PRESSURE IN HPA 1015.9 ****** ****** 1008.7 1007.4 1001.6 998.6 998.4 1005.8 1013.3 1020.7 1015.5 ****** MAX. QFF PRESSURE IN HPA 1023.5 ****** ****** 1018.6 1014.7 1006.9 1007.5 1001.7 1011.3 1019.5 1027.5 1028.7 ****** DAY 1 ** ** 1 10 4 8 7 28 18 23 23 MIN. QFF PRESSURE IN HPA 1005.4 ****** ****** 1000.0 998.3 993.3 992.0 992.4 997.8 1008.5 1014.3 1000.1 ****** DAY 3 ** ** 13 16 13 5 4 8 15 17 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 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 867.0 ****** ****** 864.2 865.2 862.8 861.7 862.1 865.9 869.3 873.5 866.4 ****** MAX. QFE PRESSURE IN HPA 872.9 ****** ****** 871.6 870.5 868.7 867.1 864.8 869.5 873.1 878.5 875.5 ****** DAY 1 ** ** 5 18 6 8 17 16 18 23 23 MIN. QFE PRESSURE IN HPA 860.4 ****** ****** 855.0 857.6 855.9 855.2 857.0 860.9 863.7 865.8 853.5 ****** DAY 27 ** ** 13 16 13 5 4 8 25 30 18 MEAN QNH PRESSURE IN HPA 1015.5 ****** ****** 1012.2 1013.4 1010.7 1009.4 1009.8 1014.2 1018.0 1022.8 1014.7 ****** MAX. QNH PRESSURE IN HPA 1022.1 ****** ****** 1020.7 1019.4 1017.4 1015.5 1012.9 1018.3 1022.4 1028.5 1025.1 ****** DAY 1 ** ** 5 18 6 8 17 16 18 23 23 MIN. QNH PRESSURE IN HPA 1007.9 ****** ****** 1001.8 1004.7 1002.8 1002.0 1004.1 1008.5 1011.7 1014.1 1000.1 ****** DAY 27 ** ** 13 16 13 5 4 8 25 30 18 MEAN QFF PRESSURE IN HPA 1017.5 ****** ****** 1008.5 1007.0 1000.7 998.4 998.5 1006.0 1014.3 1022.0 1016.7 ****** MAX. QFF PRESSURE IN HPA 1024.5 ****** ****** 1018.4 1015.0 1006.2 1006.9 1002.2 1011.4 1020.3 1029.3 1030.2 ****** DAY 1 ** ** 1 18 17 8 6 15 18 23 23 MIN. QFF PRESSURE IN HPA 1008.0 ****** ****** 999.5 998.8 992.7 990.9 991.3 996.9 1008.8 1015.5 1000.2 ****** DAY 27 ** ** 13 16 13 5 4 8 25 30 18 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 867.0 ****** ****** 863.9 865.0 862.4 861.2 861.6 865.4 869.0 873.0 866.0 ****** MAX. QFE PRESSURE IN HPA 872.0 ****** ****** 871.9 870.3 868.3 866.4 864.2 869.3 873.1 877.9 875.3 ****** DAY 1 ** ** 26 18 6 8 17 16 9 23 23 MIN. QFE PRESSURE IN HPA 860.4 ****** ****** 855.0 858.3 855.6 854.9 856.8 859.6 863.5 865.5 853.3 ****** DAY 26 ** ** 13 4 13 5 4 8 15 30 18 MEAN QNH PRESSURE IN HPA 1015.4 ****** ****** 1012.0 1013.2 1010.2 1008.9 1009.3 1013.6 1017.7 1022.3 1014.3 ****** MAX. QNH PRESSURE IN HPA 1021.1 ****** ****** 1021.0 1019.2 1016.9 1014.7 1012.2 1018.0 1022.4 1027.8 1024.9 ****** DAY 1 ** ** 26 18 6 8 17 16 9 23 23 MIN. QNH PRESSURE IN HPA 1007.9 ****** ****** 1001.8 1005.5 1002.5 1001.7 1003.8 1007.0 1011.5 1013.7 999.8 ****** DAY 26 ** ** 13 4 13 5 4 8 15 30 18 MEAN QFF PRESSURE IN HPA 1016.1 ****** ****** 1007.9 1006.6 1000.3 997.5 997.6 1004.8 1013.2 1020.1 1015.2 ****** MAX. QFF PRESSURE IN HPA 1021.7 ****** ****** 1017.5 1014.4 1006.1 1005.8 1001.2 1010.2 1020.4 1026.8 1028.9 ****** DAY 22 ** ** 1 18 6 8 6 15 9 23 23 MIN. QFF PRESSURE IN HPA 1006.1 ****** ****** 998.1 999.8 993.1 991.2 990.9 994.3 1006.6 1012.7 999.7 ****** DAY 3 ** ** 13 4 13 16 4 8 15 30 18 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 865.4 ****** ****** 862.8 864.0 861.0 859.8 860.0 863.8 867.7 871.7 864.8 ****** MAX. QFE PRESSURE IN HPA 870.0 ****** ****** 870.7 868.8 867.2 864.7 862.8 867.8 872.8 876.0 873.5 ****** DAY 1 ** ** 26 10 6 7 18 16 9 22 23 MIN. QFE PRESSURE IN HPA 857.0 ****** ****** 854.3 858.1 855.6 854.6 855.5 858.7 862.2 863.1 853.7 ****** DAY 26 ** ** 13 3 13 16 4 8 15 30 18 MEAN QNH PRESSURE IN HPA 1013.6 ****** ****** 1010.7 1012.0 1008.6 1007.2 1007.5 1011.8 1016.2 1020.8 1012.9 ****** MAX. QNH PRESSURE IN HPA 1018.8 ****** ****** 1019.6 1017.5 1015.7 1012.8 1010.7 1016.3 1022.0 1025.7 1022.8 ****** DAY 1 ** ** 26 10 6 7 18 16 9 22 23 MIN. QNH PRESSURE IN HPA 1004.1 ****** ****** 1001.0 1005.3 1002.5 1001.3 1002.4 1006.0 1010.0 1011.0 1000.3 ****** DAY 26 ** ** 13 3 13 16 4 8 15 30 18 MEAN QFF PRESSURE IN HPA 1014.1 ****** ****** 1006.7 1005.8 999.2 996.0 995.9 1003.3 1011.6 1018.5 1013.7 ****** MAX. QFF PRESSURE IN HPA 1019.7 ****** ****** 1016.4 1012.5 1005.3 1004.1 999.0 1009.3 1020.4 1024.5 1027.2 ****** DAY 1 ** ** 1 7 6 8 15 29 9 28 23 MIN. QFF PRESSURE IN HPA 1003.7 ****** ****** 997.7 999.1 992.8 989.9 990.0 994.2 1005.3 1010.8 1000.3 ****** DAY 26 ** ** 13 3 13 25 4 8 15 30 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 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 865.5 ****** ****** 862.7 863.6 860.4 859.1 859.4 863.5 867.6 871.7 865.2 ****** MAX. QFE PRESSURE IN HPA 870.3 ****** ****** 870.3 868.6 866.4 864.1 861.8 868.3 872.0 876.5 874.0 ****** DAY 22 ** ** 26 9 6 7 15 21 9 23 23 MIN. QFE PRESSURE IN HPA 855.0 ****** ****** 854.4 857.9 855.5 853.6 855.0 858.6 861.6 863.1 855.1 ****** DAY 26 ** ** 13 3 13 16 4 8 15 30 20 MEAN QNH PRESSURE IN HPA 1013.7 ****** ****** 1010.5 1011.6 1007.9 1006.4 1006.7 1011.4 1016.1 1020.7 1013.4 ****** MAX. QNH PRESSURE IN HPA 1019.2 ****** ****** 1019.2 1017.2 1014.7 1012.1 1009.5 1016.9 1021.1 1026.2 1023.4 ****** DAY 22 ** ** 26 9 6 7 15 21 9 23 23 MIN. QNH PRESSURE IN HPA 1001.8 ****** ****** 1001.1 1005.1 1002.4 1000.2 1001.8 1005.9 1009.3 1011.0 1001.9 ****** DAY 26 ** ** 13 3 13 16 4 8 15 30 20 MEAN QFF PRESSURE IN HPA 1015.1 ****** ****** 1007.4 1006.0 998.9 995.9 995.9 1003.8 1012.2 1019.4 1015.1 ****** MAX. QFF PRESSURE IN HPA 1020.7 ****** ****** 1016.7 1013.7 1004.3 1004.2 998.4 1010.0 1019.7 1026.2 1028.4 ****** DAY 1 ** ** 1 9 7 7 7 21 9 23 23 MIN. QFF PRESSURE IN HPA 1002.0 ****** ****** 998.7 999.6 993.0 989.6 990.3 996.2 1005.6 1011.3 1001.8 ****** DAY 26 ** ** 13 31 13 16 4 8 15 30 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 865.9 ****** ****** 863.2 864.1 861.1 859.8 860.2 864.8 868.3 872.2 865.8 ****** MAX. QFE PRESSURE IN HPA 870.3 ****** ****** 870.6 869.1 867.0 865.3 862.7 869.3 872.4 877.0 874.0 ****** DAY 22 ** ** 26 9 6 7 15 21 17 22 23 MIN. QFE PRESSURE IN HPA 856.3 ****** ****** 856.0 857.9 856.6 856.0 856.4 858.8 862.3 864.2 854.1 ****** DAY 26 ** ** 13 3 13 16 4 10 15 30 17 MEAN QNH PRESSURE IN HPA 1014.2 ****** ****** 1011.1 1012.2 1008.7 1007.2 1007.7 1012.9 1016.9 1021.3 1014.1 ****** MAX. QNH PRESSURE IN HPA 1019.2 ****** ****** 1019.5 1017.8 1015.4 1013.5 1010.5 1018.0 1021.6 1026.8 1023.4 ****** DAY 22 ** ** 26 9 6 7 15 21 17 22 23 MIN. QNH PRESSURE IN HPA 1003.3 ****** ****** 1002.9 1005.1 1003.6 1002.9 1003.4 1006.1 1010.1 1012.2 1000.8 ****** DAY 26 ** ** 13 3 13 16 4 10 15 30 17 MEAN QFF PRESSURE IN HPA 1016.1 ****** ****** 1007.3 1005.8 998.8 996.1 996.6 1004.9 1013.2 1020.4 1016.1 ****** MAX. QFF PRESSURE IN HPA 1021.4 ****** ****** 1017.0 1013.6 1004.6 1005.0 1000.1 1011.4 1019.9 1027.6 1029.0 ****** DAY 1 ** ** 4 9 4 7 31 21 9 23 23 MIN. QFF PRESSURE IN HPA 1003.8 ****** ****** 1000.6 999.3 993.4 989.8 991.0 995.6 1005.9 1012.5 999.8 ****** DAY 26 ** ** 16 31 13 24 3 10 15 30 17 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 866.0 ****** ****** 863.4 864.6 861.7 860.5 860.7 865.2 868.7 872.4 865.9 ****** MAX. QFE PRESSURE IN HPA 870.3 ****** ****** 870.8 869.2 867.3 867.0 863.6 869.8 872.7 877.2 874.0 ****** DAY 22 ** ** 25 9 6 7 15 21 17 22 23 MIN. QFE PRESSURE IN HPA 857.0 ****** ****** 857.2 857.8 856.6 856.2 856.5 858.7 862.6 864.0 855.0 ****** DAY 26 ** ** 12 3 12 4 3 10 15 30 17 MEAN QNH PRESSURE IN HPA 1014.3 ****** ****** 1011.3 1012.7 1009.4 1008.0 1008.3 1013.4 1017.4 1021.5 1014.1 ****** MAX. QNH PRESSURE IN HPA 1019.2 ****** ****** 1019.7 1017.9 1015.8 1015.4 1011.6 1018.6 1021.9 1027.0 1023.4 ****** DAY 22 ** ** 25 9 6 7 15 21 17 22 23 MIN. QNH PRESSURE IN HPA 1004.1 ****** ****** 1004.3 1005.0 1003.6 1003.2 1003.5 1006.0 1010.4 1012.0 1001.8 ****** DAY 26 ** ** 12 3 12 4 3 10 15 30 17 MEAN QFF PRESSURE IN HPA 1015.2 ****** ****** 1007.2 1006.2 999.8 996.8 996.7 1004.7 1012.9 1019.4 1015.1 ****** MAX. QFF PRESSURE IN HPA 1021.0 ****** ****** 1017.7 1013.2 1005.1 1006.5 1000.7 1011.5 1020.0 1026.3 1027.3 ****** DAY 1 ** ** 4 9 6 7 6 21 9 23 23 MIN. QFF PRESSURE IN HPA 1004.0 ****** ****** 1000.6 998.0 994.1 990.5 990.4 994.9 1004.9 1010.2 1000.3 ****** DAY 26 ** ** 16 15 12 26 3 10 15 30 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 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.9 -2.9 3.2 8.5 16.5 19.5 23.8 24.9 19.6 13.5 6.8 0.2 11.1 MINIMUN AIR TEMPERATURE (C) -3.8 -5.7 -1.2 3.5 10.9 12.2 16.9 18.0 12.4 7.7 3.4 -3.3 5.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 2 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 18 18 6 1 0 0 0 0 0 0 4 13 60 DAYS WITH FREEZING MIN.<= 0 27 28 24 6 0 0 0 0 0 0 7 26 118 TEMPERATURE RECORDS LOWEST(C) -11.0 -16.0 -8.0 -4.0 6.0 5.0 15.0 15.0 7.0 5.0 -7.0 -13.0 -16.0 DAY 23 3 2 1 1 6 1 20 30 13 29 25 MAXIMUM AIR TEMPERATURE (C) 4.1 2.1 9.0 14.2 22.5 26.6 30.4 32.1 27.3 20.8 12.8 6.4 17.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 22 30 10 0 0 0 65 DAYS WITH MAXIMUM TEMP. <= 0 5 11 0 0 0 0 0 0 0 0 0 8 24 TEMPERATURE RECORDS HIGHEST(C) 13.0 10.0 15.0 18.0 28.0 33.0 33.0 36.0 32.0 25.0 20.0 16.0 36.0 DAY 15 11 16 23 24 16 15 4 4 8 2 15 DIF. BETWEEN (MAX.-MIN.) (C) 7.9 7.8 10.2 10.7 11.6 14.4 13.5 14.1 14.9 13.1 9.4 9.7 11.5 MEAN DAILY TEMP. (MDT) (C) 0.2 -1.8 3.9 8.8 16.7 19.4 23.7 25.1 19.8 14.3 8.1 1.5 11.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 11.0 83.0 126.5 17.0 0.0 0.0 0.0 237.5 HEATING DEG. DAYS(BASE 18 0C) 552.5 554.0 436.5 275.0 49.5 16.5 0.0 0.0 13.0 116.0 298.0 510.0 2821.0 DEWPOINT (MEAN C) -5.0 -7.7 -2.1 0.9 8.1 7.3 11.6 11.3 7.0 6.1 1.8 -4.5 2.9 MIXING RATIO (G/KG) 3.13 2.68 3.87 4.87 8.00 7.65 10.13 9.93 7.39 6.90 5.38 3.30 6.10 VAPOUR PRESSURE (HPA) 4.33 3.70 5.32 6.68 10.98 10.47 13.77 13.51 10.14 9.53 7.42 4.56 8.37 SATURATION DEF. (HPA) 1.67 1.46 2.63 4.79 8.42 13.47 16.67 19.15 14.00 6.45 3.08 2.10 7.83 RELATIVE HUMIDITY (MEAN %) 75 71 70 61 61 48 48 44 46 64 72 72 61 RELATIVE HUMIDITY (MAX. %) 86 84 87 80 81 67 65 62 64 80 86 84 77 RELATIVE HUMIDITY (MIN. %) 59 56 52 44 42 30 33 29 31 44 54 56 44 RELATIVE HUMIDITY (MEAN% 03UTC) 80 75 80 77 78 65 65 61 64 78 81 77 73 RELATIVE HUMIDITY (MEAN% 09UTC) 67 66 59 51 47 35 38 34 35 48 59 63 50 RELATIVE HUMIDITY (MEAN% 15UTC) 75 68 62 52 46 34 38 33 36 59 71 70 54 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 38.6 50.7 40.7 101.5 67.4 7.2 2.0 0.0 3.4 14.1 99.2 22.0 446.8 DAYS WITH PRECIPITATION >=10 1 2 2 2 2 0 0 0 0 0 3 1 13 DAYS WITH PRECIPITATION >= 5 2 5 2 3 4 1 0 0 0 0 7 2 26 DAYS WITH PRECIPITATION >= 1 6 6 5 8 9 1 1 0 2 5 12 3 58 DAYS WITH PRECIPITATION 12 15 10 17 14 4 1 1 4 17 14 3 112 GREATEST DAILY PRECIPITATION 25.0 17.0 23.0 54.0 16.0 7.0 2.0 0.0 2.0 3.3 30.0 14.0 54.0 DAY 17 23 5 13 6 19 19 ** 23 28 10 23 DAY WITH THUNDER STORM 0 0 0 1 11 1 0 0 1 6 2 0 22 DAYS WITH SNOW OR SLEET 8 15 5 2 0 0 0 0 0 0 3 4 37 DAYS WITH DUST 2 0 0 2 1 1 0 0 0 0 2 0 8 WIND DIRECTION (PREVAILING) 225 225 225 225 90 225 360 225 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 5.7 4.3 3.3 5.2 4.4 5.1 4.3 2.6 3.6 3.4 4.5 3.6 4.1 PREVAILING WIND PERCENT 18.2 18.3 19.8 20.5 12.9 12.1 13.0 15.4 15.1 13.8 12.1 20.6 15.3 CALMS PERCENT OF WIND 41.3 46.9 44.9 34.3 39.9 39.7 42.5 27.5 29.7 47.4 52.7 38.1 40.4 NO. OF WIND OBSERVATION 247 224 247 239 248 239 247 247 239 247 239 247 2910 VECTOR WIND DIRECTION (MEAN) 199 221 194 192 149 274 11 11 129 175 178 207 194 VECTOR WIND MAGNITUDE(KNOTS) 1.7 1.3 0.9 1.6 0.5 0.2 0.7 0.3 0.3 0.3 1.1 1.1 0.6 WIND STEADINESES (MEAN %) 56.7 59.1 42.9 53.3 19.2 7.4 31.8 12.5 10.7 16.7 50.0 47.8 25.0 WIND SPEED (MEAN KNOTS) 3.0 2.2 2.1 3.0 2.6 2.7 2.2 2.4 2.8 1.8 2.2 2.3 2.4 FASTEST WIND DIRECTION 40 210 90 240 180 220 360 310 240 210 130 270 40 FASTEST WIND SPEED (KNOTS) 21 15 15 16 12 17 10 12 13 15 18 20 21 DAY 4 1 27 21 1 22 18 7 18 11 22 17 DAYS WITH SKY CLEAR (0-2)/8 12 4 8 7 12 29 28 30 25 17 14 11 197 DAYS WITH P.CLOUDY (3-6)/8 12 10 16 16 13 1 3 1 5 12 10 13 112 DAYS WITH CLOUDY (7-8)/8 7 14 7 7 6 0 0 0 0 2 6 7 56 DAYS WITH VISIBILITY =< 2 KM 5 6 1 2 0 0 0 0 0 0 1 0 15 DURATION OF SUNSHINE HOURS 145.2 107.1 169.9 179.2 245.8 362.0 369.0 296.5 302.1 216.6 163.0 116.0 2672.4 ======================================================================================================================= 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 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 866.8 864.2 861.5 861.8 864.3 862.3 860.0 860.2 863.3 868.8 866.5 865.7 863.8 MAX. QFE PRESSURE IN HPA 876.0 875.1 871.1 870.5 870.7 868.7 867.1 865.2 870.7 875.9 875.1 874.1 876.0 DAY-HOUR 6- 6 28- 6 1- 6 9- 6 2-21 2- 6 23- 6 15- 6 25- 6 15- 9 30- 9 12- 0 MIN. QFE PRESSURE IN HPA 856.3 849.2 852.0 852.0 856.6 854.2 854.8 854.4 856.3 861.7 857.3 848.8 848.8 DAY-HOUR 18-15 23-15 25-15 25-12 31- 0 19-15 4-15 5-15 17-18 3-15 25- 3 23- 3 MEAN QNH PRESSURE IN HPA 1015.2 1012.3 1009.2 1009.5 1012.4 1010.1 1007.4 1007.7 1011.2 1017.5 1014.8 1014.0 1011.8 MAX. QNH PRESSURE IN HPA 1025.7 1024.6 1020.1 1019.4 1019.6 1017.4 1015.5 1013.4 1019.6 1025.5 1024.6 1023.5 1025.7 DAY-HOUR 6- 6 28- 6 1- 6 9- 6 2-21 2- 6 23- 6 15- 6 25- 6 15- 9 30- 9 12- 0 MIN. QNH PRESSURE IN HPA 1003.3 995.2 998.4 998.4 1003.6 1000.9 1001.6 1001.1 1003.3 1009.4 1004.4 994.7 994.7 DAY-HOUR 18-15 23-15 25-15 25-12 31- 0 19-15 4-15 5-15 17-18 3-15 25- 3 23- 3 MEAN QFF PRESSURE IN HPA 1019.4 1017.6 1010.8 1008.0 1006.3 1002.5 997.4 997.1 1003.5 1013.3 1014.3 1017.4 1009.0 MAX. QFF PRESSURE IN HPA 1030.2 1034.3 1026.8 1021.8 1015.1 1013.5 1005.3 1003.8 1014.7 1023.3 1029.7 1029.9 1034.3 DAY-HOUR 6- 6 3- 6 1- 6 13- 6 9- 9 5-21 23- 3 29- 6 25- 6 15- 3 30- 6 27- 6 MIN. QFF PRESSURE IN HPA 1004.4 997.4 998.4 994.8 996.1 993.6 992.2 989.0 993.8 1003.4 1003.2 995.6 989.0 DAY-HOUR 15-12 23-21 27- 3 25-12 30-15 19-15 10-12 5-15 17-21 11- 9 22-12 23- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 867.1 864.0 861.7 861.9 864.5 862.6 860.2 860.4 863.5 868.8 866.4 865.8 863.9 MAX. QFE PRESSURE IN HPA 874.0 874.3 870.9 869.4 870.2 867.9 865.5 863.5 869.4 874.8 871.7 874.1 874.8 DAY 6 28 1 10 3 2 23 15 25 15 30 12 MIN. QFE PRESSURE IN HPA 857.8 850.5 853.1 852.3 856.6 857.0 856.1 856.7 857.8 861.7 858.0 849.2 849.2 DAY 30 24 27 25 31 19 5 5 8 11 25 23 MEAN QNH PRESSURE IN HPA 1015.5 1012.1 1009.4 1009.7 1012.5 1010.4 1007.7 1007.9 1011.4 1017.4 1014.8 1014.1 1011.9 MAX. QNH PRESSURE IN HPA 1023.4 1023.7 1019.9 1018.2 1019.1 1016.5 1013.7 1011.5 1018.2 1024.3 1020.8 1023.5 1024.3 DAY 6 28 1 10 3 2 23 15 25 15 30 12 MIN. QNH PRESSURE IN HPA 1005.0 996.7 999.6 998.7 1003.6 1004.1 1003.0 1003.7 1005.0 1009.4 1005.2 995.2 995.2 DAY 30 24 27 25 31 19 5 5 8 11 25 23 MEAN QFF PRESSURE IN HPA 1019.2 1017.0 1010.7 1008.2 1006.5 1002.8 997.4 997.1 1003.5 1013.0 1013.7 1017.0 1008.8 MAX. QFF PRESSURE IN HPA 1028.7 1032.3 1025.2 1018.5 1013.6 1012.2 1003.2 1001.6 1012.8 1021.5 1024.9 1026.1 1032.3 DAY 8 3 1 14 3 6 23 28 25 15 30 27 MIN. QFF PRESSURE IN HPA 1006.9 999.4 998.5 995.8 996.4 995.0 993.5 991.1 995.2 1003.8 1005.0 995.6 991.1 DAY 30 24 27 25 31 19 5 5 18 11 23 23 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.8 864.0 861.7 861.9 864.5 863.1 860.8 861.0 863.9 868.9 866.5 865.8 864.1 MAX. QFE PRESSURE IN HPA 874.4 874.3 870.7 869.6 870.2 868.2 866.5 864.3 870.0 875.1 872.0 873.9 875.1 DAY 6 28 1 9 3 2 23 15 25 15 30 12 MIN. QFE PRESSURE IN HPA 857.4 850.3 852.6 852.3 856.6 857.0 857.3 856.7 858.1 861.7 857.3 848.8 848.8 DAY 30 24 27 25 31 19 5 5 18 11 25 23 MEAN QNH PRESSURE IN HPA 1015.2 1012.0 1009.4 1009.6 1012.5 1011.0 1008.4 1008.6 1011.9 1017.6 1014.9 1014.0 1012.1 MAX. QNH PRESSURE IN HPA 1023.8 1023.7 1019.6 1018.4 1019.1 1016.8 1014.9 1012.4 1018.8 1024.6 1021.1 1023.3 1024.6 DAY 6 28 1 9 3 2 23 15 25 15 30 12 MIN. QNH PRESSURE IN HPA 1004.5 996.4 999.1 998.7 1003.6 1004.1 1004.4 1003.7 1005.3 1009.4 1004.4 994.7 994.7 DAY 30 24 27 25 31 19 5 5 18 11 25 23 MEAN QFF PRESSURE IN HPA 1019.8 1017.6 1011.4 1008.8 1006.9 1004.0 998.9 998.5 1005.0 1014.2 1014.8 1017.9 1009.8 MAX. QFF PRESSURE IN HPA 1028.5 1034.1 1026.2 1020.0 1014.2 1011.7 1005.3 1003.2 1014.2 1023.3 1026.5 1027.8 1034.1 DAY 23 3 1 13 3 6 23 29 25 15 28 27 MIN. QFF PRESSURE IN HPA 1006.6 999.3 998.4 996.5 996.4 995.9 995.7 991.5 996.8 1004.9 1007.0 996.9 991.5 DAY 18 24 27 25 31 19 27 5 18 11 23 23 ======================================================================================================================= 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 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 867.7 864.9 862.2 862.5 865.0 863.6 861.3 861.5 864.5 869.7 867.3 866.6 864.7 MAX. QFE PRESSURE IN HPA 876.0 875.1 871.1 870.5 870.7 868.7 867.1 865.2 870.7 875.7 874.7 874.1 876.0 DAY 6 28 1 9 3 2 23 15 25 15 30 12 MIN. QFE PRESSURE IN HPA 857.9 852.4 853.8 853.1 857.8 857.2 858.1 857.2 858.7 862.3 860.0 851.8 851.8 DAY 20 24 27 25 31 19 10 5 18 11 25 23 MEAN QNH PRESSURE IN HPA 1016.2 1013.1 1009.9 1010.3 1013.1 1011.5 1008.9 1009.2 1012.6 1018.6 1015.8 1015.0 1012.8 MAX. QNH PRESSURE IN HPA 1025.7 1024.6 1020.1 1019.4 1019.6 1017.4 1015.5 1013.4 1019.6 1025.3 1024.2 1023.5 1025.7 DAY 6 28 1 9 3 2 23 15 25 15 30 12 MIN. QNH PRESSURE IN HPA 1005.1 998.8 1000.4 999.6 1005.0 1004.3 1005.3 1004.3 1006.0 1010.1 1007.5 998.1 998.1 DAY 20 24 27 25 31 19 10 5 18 11 25 23 MEAN QFF PRESSURE IN HPA 1020.9 1018.8 1011.8 1008.7 1007.1 1003.8 998.9 998.8 1004.9 1014.5 1015.6 1019.0 1010.2 MAX. QFF PRESSURE IN HPA 1030.2 1034.3 1026.8 1021.8 1014.2 1011.3 1005.2 1003.8 1014.7 1022.9 1029.7 1029.9 1034.3 DAY 6 3 1 13 3 6 23 29 25 15 30 27 MIN. QFF PRESSURE IN HPA 1006.5 1001.7 1000.6 996.5 998.6 996.1 994.4 993.2 996.6 1004.5 1007.8 1000.8 993.2 DAY 18 24 27 21 31 19 10 5 7 11 22 23 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 867.1 864.8 861.8 862.2 864.8 862.8 860.7 861.0 863.9 869.4 867.0 866.1 864.3 MAX. QFE PRESSURE IN HPA 875.5 874.6 870.6 870.2 870.5 867.8 866.5 864.7 869.7 875.9 875.1 874.1 875.9 DAY 6 28 1 9 22 2 23 15 25 15 30 12 MIN. QFE PRESSURE IN HPA 857.2 854.2 852.7 853.0 857.6 855.9 857.3 857.0 858.2 861.8 859.6 854.8 852.7 DAY 20 24 22 25 31 19 10 5 18 11 22 3 MEAN QNH PRESSURE IN HPA 1015.6 1012.9 1009.6 1009.9 1012.9 1010.7 1008.3 1008.6 1011.9 1018.1 1015.4 1014.4 1012.4 MAX. QNH PRESSURE IN HPA 1025.1 1024.1 1019.5 1019.1 1019.4 1016.3 1014.9 1012.8 1018.5 1025.5 1024.6 1023.5 1025.5 DAY 6 28 1 9 22 2 23 15 25 15 30 12 MIN. QNH PRESSURE IN HPA 1004.3 1000.9 999.2 999.5 1004.7 1002.8 1004.4 1004.1 1005.4 1009.5 1007.0 1001.6 999.2 DAY 20 24 22 25 31 19 10 5 18 11 22 3 MEAN QFF PRESSURE IN HPA 1019.1 1017.9 1010.8 1007.8 1006.5 1002.7 997.9 997.7 1003.9 1013.4 1014.5 1017.3 1009.1 MAX. QFF PRESSURE IN HPA 1029.6 1032.0 1025.1 1021.4 1015.1 1012.0 1003.9 1002.5 1013.2 1022.0 1028.6 1028.2 1032.0 DAY 6 3 1 13 9 5 23 29 25 15 30 27 MIN. QFF PRESSURE IN HPA 1005.2 1003.1 999.1 995.9 998.0 994.1 994.2 992.3 995.7 1003.4 1004.7 1002.7 992.3 DAY 18 24 22 25 31 19 10 5 18 11 22 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 866.0 863.6 860.7 861.3 863.8 861.5 859.2 859.4 862.4 868.2 865.9 864.9 863.1 MAX. QFE PRESSURE IN HPA 874.1 873.3 869.6 868.9 869.5 866.6 864.7 863.2 868.5 874.2 871.3 873.1 874.2 DAY 6 27 3 13 2 2 22 15 24 15 28 11 MIN. QFE PRESSURE IN HPA 856.6 851.8 852.1 852.0 857.2 855.3 855.9 855.7 857.2 861.7 857.8 852.5 851.8 DAY 18 23 22 25 30 19 10 5 7 11 22 3 MEAN QNH PRESSURE IN HPA 1014.3 1011.6 1008.3 1009.0 1011.8 1009.2 1006.6 1006.8 1010.2 1016.8 1014.2 1013.0 1011.0 MAX. QNH PRESSURE IN HPA 1023.5 1022.6 1018.4 1017.6 1018.3 1015.0 1012.8 1011.1 1017.1 1023.6 1020.3 1022.4 1023.6 DAY 6 27 3 13 2 2 22 15 24 15 28 11 MIN. QNH PRESSURE IN HPA 1003.6 998.1 998.5 998.4 1004.3 1002.1 1002.8 1002.6 1004.3 1009.4 1005.0 998.9 998.1 DAY 18 23 22 25 30 19 10 5 7 11 22 3 MEAN QFF PRESSURE IN HPA 1018.0 1016.5 1009.5 1007.3 1005.6 1001.5 996.3 995.9 1002.2 1012.3 1013.2 1015.9 1007.8 MAX. QFF PRESSURE IN HPA 1027.8 1030.3 1022.4 1019.7 1012.8 1010.8 1002.3 1000.7 1010.9 1020.2 1024.5 1027.7 1030.3 DAY 6 3 1 13 2 5 22 28 25 15 28 27 MIN. QFF PRESSURE IN HPA 1004.4 1001.1 998.5 994.8 997.1 994.0 992.2 989.9 994.7 1003.7 1003.2 999.5 989.9 DAY 15 23 22 25 30 18 10 5 7 11 22 3 ======================================================================================================================= 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 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 866.2 863.8 860.7 861.1 863.3 861.0 858.5 858.8 862.1 868.2 866.1 865.3 862.9 MAX. QFE PRESSURE IN HPA 874.4 873.3 869.4 868.6 869.5 866.6 864.0 862.6 868.5 874.0 872.3 873.6 874.4 DAY 6 27 3 13 2 5 22 15 24 15 30 11 MIN. QFE PRESSURE IN HPA 856.3 849.2 852.0 852.3 856.7 854.2 854.8 854.4 856.5 861.7 858.0 852.4 849.2 DAY 18 23 25 25 30 19 4 5 17 3 22 3 MEAN QNH PRESSURE IN HPA 1014.6 1011.7 1008.2 1008.7 1011.2 1008.7 1005.7 1006.1 1009.9 1016.7 1014.5 1013.5 1010.8 MAX. QNH PRESSURE IN HPA 1023.8 1022.6 1018.2 1017.2 1018.3 1015.0 1012.0 1010.4 1017.1 1023.4 1021.5 1022.9 1023.8 DAY 6 27 3 13 2 5 22 15 24 15 30 11 MIN. QNH PRESSURE IN HPA 1003.3 995.2 998.4 998.7 1003.7 1000.9 1001.6 1001.1 1003.5 1009.4 1005.2 998.8 995.2 DAY 18 23 25 25 30 19 4 5 17 3 22 3 MEAN QFF PRESSURE IN HPA 1019.1 1017.3 1010.1 1007.7 1005.5 1001.5 996.1 995.9 1002.9 1013.2 1014.5 1017.4 1008.4 MAX. QFF PRESSURE IN HPA 1028.9 1031.5 1022.4 1019.8 1013.4 1011.9 1002.4 1000.7 1011.9 1021.1 1026.4 1027.7 1031.5 DAY 6 3 1 13 2 5 22 28 24 15 30 27 MIN. QFF PRESSURE IN HPA 1004.8 998.2 998.7 996.3 996.1 993.6 992.6 989.0 995.0 1005.3 1004.3 999.5 989.0 DAY 18 23 22 25 30 19 10 5 7 3 22 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 866.8 864.3 861.6 861.8 864.3 861.9 859.3 859.5 862.8 868.7 866.3 865.8 863.6 MAX. QFE PRESSURE IN HPA 874.5 874.1 869.4 869.4 870.3 867.7 864.9 863.0 868.8 874.0 872.7 873.9 874.5 DAY 6 27 3 13 2 1 22 28 24 15 30 11 MIN. QFE PRESSURE IN HPA 856.7 849.7 853.3 853.0 856.9 855.6 855.7 854.4 856.3 862.0 858.6 853.6 849.7 DAY 18 23 25 25 30 19 4 5 17 10 22 3 MEAN QNH PRESSURE IN HPA 1015.2 1012.4 1009.3 1009.5 1012.4 1009.6 1006.6 1006.9 1010.6 1017.4 1014.7 1014.1 1011.6 MAX. QNH PRESSURE IN HPA 1024.0 1023.5 1018.2 1018.2 1019.2 1016.2 1013.0 1010.9 1017.5 1023.4 1021.9 1023.3 1024.0 DAY 6 27 3 13 2 1 22 28 24 15 30 11 MIN. QNH PRESSURE IN HPA 1003.7 995.8 999.8 999.5 1003.9 1002.5 1002.6 1001.1 1003.3 1009.7 1005.9 1000.2 995.8 DAY 18 23 25 25 30 19 4 5 17 10 22 3 MEAN QFF PRESSURE IN HPA 1019.8 1018.2 1011.1 1007.9 1006.3 1001.8 996.6 996.5 1003.0 1013.4 1014.6 1018.1 1008.9 MAX. QFF PRESSURE IN HPA 1029.1 1031.8 1022.5 1020.9 1013.5 1013.4 1002.2 1002.0 1012.0 1021.0 1027.1 1027.8 1031.8 DAY 6 3 2 13 2 5 22 28 24 14 30 27 MIN. QFF PRESSURE IN HPA 1005.2 998.1 1000.0 996.8 997.8 993.7 992.5 989.4 994.3 1004.5 1004.9 1000.9 989.4 DAY 18 23 25 25 30 22 10 5 17 1 22 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 867.2 864.6 861.8 861.9 864.6 862.4 859.8 860.0 863.2 868.9 866.3 865.6 863.9 MAX. QFE PRESSURE IN HPA 874.3 874.3 869.4 869.4 870.7 867.9 865.4 863.3 869.0 874.7 871.5 873.9 874.7 DAY 6 27 2 13 2 1 22 28 24 14 28 11 MIN. QFE PRESSURE IN HPA 857.6 850.1 853.8 853.4 857.1 857.0 855.9 856.2 856.7 861.7 858.5 851.2 850.1 DAY 29 23 25 24 30 18 4 5 17 10 24 22 MEAN QNH PRESSURE IN HPA 1015.6 1012.7 1009.6 1009.7 1012.7 1010.2 1007.3 1007.5 1011.1 1017.6 1014.6 1013.9 1011.9 MAX. QNH PRESSURE IN HPA 1023.7 1023.7 1018.2 1018.2 1019.6 1016.5 1013.6 1011.2 1017.7 1024.2 1020.5 1023.3 1024.2 DAY 6 27 2 13 2 1 22 28 24 14 28 11 MIN. QNH PRESSURE IN HPA 1004.7 996.2 1000.4 1000.0 1004.2 1004.1 1002.8 1003.2 1003.7 1009.4 1005.8 997.5 996.2 DAY 29 23 25 24 30 18 4 5 17 10 24 22 MEAN QFF PRESSURE IN HPA 1019.4 1017.8 1010.7 1007.7 1006.3 1002.3 996.9 996.6 1003.0 1012.7 1013.6 1016.9 1008.7 MAX. QFF PRESSURE IN HPA 1029.0 1032.4 1021.7 1020.6 1013.9 1013.5 1002.8 1001.8 1011.9 1021.1 1025.1 1026.2 1032.4 DAY 7 2 1 13 2 5 22 28 24 14 28 29 MIN. QFF PRESSURE IN HPA 1006.4 997.4 998.7 996.7 997.3 994.5 992.8 991.2 993.8 1003.4 1004.1 997.9 991.2 DAY 29 23 25 25 30 18 4 5 17 10 22 22 ======================================================================================================================= 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 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.2 -0.9 4.7 11.5 16.1 19.2 25.3 23.9 21.2 14.7 7.8 2.8 12.1 MINIMUN AIR TEMPERATURE (C) -4.6 -5.3 0.1 6.2 11.0 12.6 17.2 16.1 13.2 8.8 3.2 -0.2 6.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 0 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 19 17 4 0 0 0 0 0 0 0 0 3 43 DAYS WITH FREEZING MIN.<= 0 26 27 22 0 0 0 0 0 0 0 0 17 92 TEMPERATURE RECORDS LOWEST(C) -11.0 -16.0 -6.0 2.0 7.0 8.0 12.0 13.0 11.0 4.0 1.0 -4.0 -16.0 DAY 23 7 23 4 1 8 13 19 22 26 17 14 MAXIMUM AIR TEMPERATURE (C) 4.5 5.4 10.5 17.6 22.2 26.1 32.5 31.5 29.2 22.0 13.8 7.5 18.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 5 25 28 16 0 0 0 74 DAYS WITH MAXIMUM TEMP. <= 0 4 6 0 0 0 0 0 0 0 0 0 0 10 TEMPERATURE RECORDS HIGHEST(C) 12.0 18.0 15.0 24.0 27.0 33.0 37.0 34.0 32.0 27.0 17.0 13.0 37.0 DAY 7 29 13 15 24 28 21 1 4 2 23 2 DIF. BETWEEN (MAX.-MIN.) (C) 9.1 10.7 10.4 11.4 11.2 13.5 15.3 15.4 16.0 13.2 10.6 7.7 12.1 MEAN DAILY TEMP. (MDT) (C) -0.0 0.1 5.3 11.9 16.6 19.4 24.8 23.8 21.2 15.4 8.5 3.6 12.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 10.5 118.5 88.5 17.5 0.0 0.0 0.0 235.0 HEATING DEG. DAYS(BASE 18 0C) 559.5 520.5 394.0 183.5 49.5 16.0 0.0 0.0 0.0 85.5 284.0 431.5 2524.0 DEWPOINT (MEAN C) -6.7 -7.0 -2.4 4.0 9.1 9.6 9.2 8.7 5.9 6.0 4.3 -1.2 3.3 MIXING RATIO (G/KG) 2.80 2.83 3.82 5.97 8.56 8.87 8.78 8.38 6.93 6.89 6.06 4.11 6.17 VAPOUR PRESSURE (HPA) 3.86 3.91 5.26 8.22 11.74 12.12 11.99 11.44 9.52 9.51 8.37 5.67 8.47 SATURATION DEF. (HPA) 1.99 2.39 3.61 6.00 7.11 11.07 21.82 19.61 16.80 7.98 2.39 1.94 8.56 RELATIVE HUMIDITY (MEAN %) 68 66 63 64 66 57 39 40 40 60 80 76 60 RELATIVE HUMIDITY (MAX. %) 82 80 79 82 85 78 59 58 61 76 93 89 77 RELATIVE HUMIDITY (MIN. %) 52 50 46 47 46 38 23 26 22 41 63 62 43 RELATIVE HUMIDITY (MEAN% 03UTC) 74 73 73 80 81 77 56 56 58 75 89 81 73 RELATIVE HUMIDITY (MEAN% 09UTC) 58 54 55 53 55 44 30 32 31 46 66 67 49 RELATIVE HUMIDITY (MEAN% 15UTC) 65 61 57 54 58 44 29 30 27 54 78 76 53 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 3.7 26.2 92.3 92.8 131.4 27.2 0.0 11.0 1.0 40.1 39.1 36.0 500.8 DAYS WITH PRECIPITATION >=10 0 1 4 3 3 0 0 1 0 1 1 1 15 DAYS WITH PRECIPITATION >= 5 0 2 7 6 10 3 0 1 0 3 3 2 37 DAYS WITH PRECIPITATION >= 1 1 4 10 11 15 7 0 1 1 5 8 10 73 DAYS WITH PRECIPITATION 10 7 14 14 24 13 0 1 1 9 12 15 120 GREATEST DAILY PRECIPITATION 2.0 16.0 22.0 34.0 35.0 8.0 0.0 11.0 1.0 18.0 11.2 11.0 35.0 DAY 13 2 29 2 27 3 ** 18 17 24 1 27 DAY WITH THUNDER STORM 0 0 0 0 5 11 0 1 0 6 1 2 26 DAYS WITH SNOW OR SLEET 8 4 4 0 0 0 0 0 0 0 0 8 24 DAYS WITH DUST 4 2 4 1 2 0 0 0 0 0 0 2 15 WIND DIRECTION (PREVAILING) 180 225 225 90 90 225 225 225 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 6.3 3.4 5.6 4.4 4.6 4.1 3.5 3.5 5.3 4.4 2.9 4.4 4.3 PREVAILING WIND PERCENT 19.4 26.3 21.9 11.7 9.7 15.5 17.3 21.1 25.1 16.6 12.5 17.0 17.4 CALMS PERCENT OF WIND 32.8 31.0 34.8 33.5 38.5 22.6 19.4 9.7 20.1 43.7 62.1 46.6 32.9 NO. OF WIND OBSERVATION 247 232 247 239 247 239 248 247 239 247 240 247 2919 VECTOR WIND DIRECTION (MEAN) 194 204 195 95 81 109 22 207 212 180 134 199 192 VECTOR WIND MAGNITUDE(KNOTS) 2.0 1.2 1.7 R< 0.1 0.2 0.2 0.5 0.2 1.1 0.5 0.4 1.0 0.6 WIND STEADINESES (MEAN %) 55.6 46.2 45.9 0.6 8.3 6.7 15.6 5.9 29.7 20.0 30.8 47.6 21.4 WIND SPEED (MEAN KNOTS) 3.6 2.6 3.7 2.6 2.4 3.0 3.2 3.4 3.7 2.5 1.3 2.1 2.8 FASTEST WIND DIRECTION 180 150 210 340 360 210 240 300 250 270 190 210 340 FASTEST WIND SPEED (KNOTS) 22 14 20 25 10 15 15 12 19 14 8 10 25 DAY 14 28 12 2 11 5 21 8 10 13 30 1 DAYS WITH SKY CLEAR (0-2)/8 15 10 12 10 6 16 29 29 28 17 10 7 189 DAYS WITH P.CLOUDY (3-6)/8 10 15 9 9 11 12 2 2 2 11 15 10 108 DAYS WITH CLOUDY (7-8)/8 6 4 10 11 14 2 0 0 0 3 5 14 69 DAYS WITH VISIBILITY =< 2 KM 0 2 3 2 0 1 4 0 2 0 1 4 19 DURATION OF SUNSHINE HOURS 157.6 151.6 167.9 179.7 175.7 305.2 382.2 377.6 324.2 234.8 145.8 101.7 2704.0 ======================================================================================================================= 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 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 861.7 865.8 863.1 864.9 865.8 862.6 861.5 861.1 864.7 867.6 868.5 865.2 864.4 MAX. QFE PRESSURE IN HPA 874.3 876.5 873.6 870.7 871.4 870.0 866.3 867.0 871.2 875.9 873.8 875.8 876.5 DAY-HOUR 1- 6 5- 6 26- 6 12- 6 23- 6 2- 6 13- 6 27- 6 18- 6 16- 6 24- 6 20- 6 MIN. QFE PRESSURE IN HPA 850.9 856.5 850.6 853.2 859.7 857.1 855.5 855.2 859.5 859.8 863.1 855.7 850.6 DAY-HOUR 15-18 20-12 14- 3 24- 0 30- 3 5- 9 4-15 2-15 8-15 25-12 1-12 15-12 MEAN QNH PRESSURE IN HPA 1009.4 1014.0 1010.9 1013.0 1014.0 1010.4 1009.1 1008.8 1012.8 1016.1 1017.2 1013.4 1012.4 MAX. QNH PRESSURE IN HPA 1023.7 1026.2 1022.9 1019.6 1020.4 1018.8 1014.6 1015.4 1020.2 1025.5 1023.2 1025.4 1026.2 DAY-HOUR 1- 6 5- 6 26- 6 12- 6 23- 6 2- 6 13- 6 27- 6 18- 6 16- 6 24- 6 20- 6 MIN. QNH PRESSURE IN HPA 997.1 1003.5 996.8 999.7 1007.1 1004.2 1002.4 1002.0 1006.9 1007.2 1011.0 1002.6 996.8 DAY-HOUR 15-18 20-12 14- 3 24- 0 30- 3 5- 9 4-15 2-15 8-15 25-12 1-12 15-12 MEAN QFF PRESSURE IN HPA 1013.6 1018.3 1011.6 1009.8 1008.1 1002.8 998.5 998.8 1004.4 1011.1 1016.1 1015.3 1009.0 MAX. QFF PRESSURE IN HPA 1030.5 1036.4 1024.7 1018.7 1014.2 1012.8 1006.7 1007.8 1012.8 1019.4 1023.3 1028.6 1036.4 DAY-HOUR 1- 6 5- 6 26- 6 4- 3 23- 3 2- 3 12- 9 19- 6 17- 6 16- 6 24- 6 22- 6 MIN. QFF PRESSURE IN HPA 998.4 1003.6 994.0 996.8 1001.8 996.3 991.9 990.8 998.1 1001.5 1009.3 1002.3 990.8 DAY-HOUR 10- 9 20-12 14- 0 24- 0 30-12 5- 9 4-18 2-12 9- 0 3-21 1-12 15-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 862.2 865.9 863.1 864.9 866.0 863.0 861.6 861.3 864.9 867.7 868.5 865.2 864.5 MAX. QFE PRESSURE IN HPA 872.7 875.6 873.1 869.0 871.2 869.2 864.9 865.5 870.1 874.6 872.1 874.6 875.6 DAY 2 5 27 5 23 2 26 27 18 16 25 20 MIN. QFE PRESSURE IN HPA 851.3 857.6 851.1 853.2 860.6 858.5 856.7 857.0 859.8 860.3 864.0 857.7 851.1 DAY 16 21 14 24 30 5 5 2 9 25 2 27 MEAN QNH PRESSURE IN HPA 1009.9 1014.1 1011.0 1013.1 1014.2 1010.9 1009.3 1009.0 1013.0 1016.3 1017.2 1013.4 1012.6 MAX. QNH PRESSURE IN HPA 1021.9 1025.2 1022.4 1017.7 1020.2 1017.9 1013.0 1013.7 1019.0 1024.1 1021.2 1024.1 1025.2 DAY 2 5 27 5 23 2 26 27 18 16 25 20 MIN. QNH PRESSURE IN HPA 997.6 1004.7 997.3 999.7 1008.2 1005.8 1003.7 1004.1 1007.2 1007.8 1012.0 1004.9 997.3 DAY 16 21 14 24 30 5 5 2 9 25 2 27 MEAN QFF PRESSURE IN HPA 1013.6 1018.0 1011.5 1009.9 1008.2 1003.3 998.6 998.8 1004.3 1011.0 1015.7 1014.8 1009.0 MAX. QFF PRESSURE IN HPA 1027.9 1033.0 1023.8 1017.9 1013.4 1012.6 1004.2 1004.5 1011.3 1017.9 1019.8 1027.0 1033.0 DAY 2 6 23 4 3 2 13 19 18 28 16 23 MIN. QFF PRESSURE IN HPA 1001.1 1004.7 994.0 996.8 1002.7 997.9 993.7 992.4 998.1 1001.8 1009.8 1004.4 992.4 DAY 16 21 14 24 30 29 5 2 9 4 2 12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 862.0 865.9 863.2 864.9 865.9 863.2 862.2 861.8 865.3 867.9 868.5 865.1 864.7 MAX. QFE PRESSURE IN HPA 872.3 875.6 872.7 869.6 871.2 869.5 865.7 866.6 870.1 874.7 872.4 874.6 875.6 DAY 1 5 27 12 23 2 13 27 17 16 24 20 MIN. QFE PRESSURE IN HPA 852.0 858.1 850.6 853.2 859.7 858.3 857.1 857.4 861.7 860.1 863.6 856.3 850.6 DAY 16 21 14 24 30 5 5 2 6 25 29 27 MEAN QNH PRESSURE IN HPA 1009.7 1014.1 1011.1 1013.1 1014.2 1011.1 1010.0 1009.5 1013.5 1016.4 1017.1 1013.3 1012.8 MAX. QNH PRESSURE IN HPA 1021.5 1025.2 1021.9 1018.4 1020.2 1018.3 1014.0 1015.0 1019.0 1024.2 1021.6 1024.1 1025.2 DAY 1 5 27 12 23 2 13 27 17 16 24 20 MIN. QNH PRESSURE IN HPA 998.4 1005.3 996.8 999.7 1007.1 1005.5 1004.2 1004.5 1009.4 1007.6 1011.6 1003.3 996.8 DAY 16 21 14 24 30 5 5 2 6 25 29 27 MEAN QFF PRESSURE IN HPA 1014.4 1019.1 1012.3 1010.5 1008.9 1004.2 1000.0 1000.2 1006.0 1012.1 1016.6 1015.4 1010.0 MAX. QFF PRESSURE IN HPA 1028.3 1035.3 1024.6 1018.7 1014.2 1012.8 1006.6 1007.3 1012.5 1019.2 1021.7 1027.5 1035.3 DAY 1 5 23 4 23 2 13 19 18 16 24 22 MIN. QFF PRESSURE IN HPA 1000.6 1006.4 994.1 997.3 1002.1 998.1 994.2 994.6 1001.4 1003.3 1010.3 1004.3 994.1 DAY 10 21 14 24 30 29 5 2 9 4 2 12 ======================================================================================================================= 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 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 862.5 866.6 863.8 865.7 866.5 863.6 862.8 862.4 865.9 868.6 869.3 866.0 865.3 MAX. QFE PRESSURE IN HPA 874.3 876.5 873.6 870.7 871.4 870.0 866.3 867.0 871.2 875.9 873.8 875.8 876.5 DAY 1 5 26 12 23 2 13 27 18 16 24 20 MIN. QFE PRESSURE IN HPA 851.6 859.2 850.8 853.3 859.7 858.4 857.3 857.4 862.1 860.9 864.2 857.3 850.8 DAY 10 21 14 24 30 5 4 2 6 25 1 15 MEAN QNH PRESSURE IN HPA 1010.3 1015.0 1011.8 1013.9 1014.9 1011.6 1010.6 1010.1 1014.2 1017.3 1018.1 1014.3 1013.5 MAX. QNH PRESSURE IN HPA 1023.7 1026.2 1022.9 1019.6 1020.4 1018.8 1014.6 1015.4 1020.2 1025.5 1023.2 1025.4 1026.2 DAY 1 5 26 12 23 2 13 27 18 16 24 20 MIN. QNH PRESSURE IN HPA 997.9 1006.6 997.0 999.8 1007.1 1005.7 1004.4 1004.5 1009.9 1008.5 1012.2 1004.4 997.0 DAY 10 21 14 24 30 5 4 2 6 25 1 15 MEAN QFF PRESSURE IN HPA 1015.2 1020.0 1012.6 1010.7 1008.9 1004.1 999.7 1000.2 1005.9 1012.6 1017.5 1016.6 1010.3 MAX. QFF PRESSURE IN HPA 1030.5 1036.4 1024.7 1018.7 1013.7 1012.6 1005.9 1007.8 1012.8 1019.4 1023.3 1028.6 1036.4 DAY 1 5 26 4 3 1 13 19 17 16 24 22 MIN. QFF PRESSURE IN HPA 999.5 1006.9 994.7 998.0 1002.3 997.8 993.7 993.4 1001.0 1004.2 1011.3 1004.7 993.4 DAY 10 21 14 24 30 5 4 2 9 4 1 12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 862.1 866.3 863.7 865.6 866.4 863.2 862.2 861.7 865.3 868.1 868.9 865.5 864.9 MAX. QFE PRESSURE IN HPA 873.9 875.9 873.6 870.2 871.2 869.3 865.3 866.4 870.8 875.1 873.5 874.6 875.9 DAY 1 5 26 27 23 2 25 27 18 16 24 20 MIN. QFE PRESSURE IN HPA 851.1 858.8 850.8 854.6 859.7 857.1 856.9 857.0 861.3 860.4 864.2 857.0 850.8 DAY 10 20 14 24 30 5 4 2 11 25 1 15 MEAN QNH PRESSURE IN HPA 1009.8 1014.7 1011.6 1013.9 1014.7 1011.1 1010.0 1009.4 1013.4 1016.6 1017.6 1013.8 1013.1 MAX. QNH PRESSURE IN HPA 1023.3 1025.5 1022.9 1019.1 1020.2 1018.0 1013.5 1014.7 1019.7 1024.6 1022.8 1024.1 1025.5 DAY 1 5 26 27 23 2 25 27 18 16 24 20 MIN. QNH PRESSURE IN HPA 997.3 1006.1 997.0 1001.3 1007.1 1004.2 1003.9 1004.1 1008.9 1007.9 1012.2 1004.1 997.0 DAY 10 20 14 24 30 5 4 2 11 25 1 15 MEAN QFF PRESSURE IN HPA 1013.0 1018.5 1012.0 1010.2 1008.4 1002.9 999.2 999.0 1004.5 1011.2 1016.3 1015.2 1009.2 MAX. QFF PRESSURE IN HPA 1027.9 1034.2 1024.2 1017.1 1012.6 1011.5 1006.7 1006.8 1011.6 1017.7 1021.4 1027.2 1034.2 DAY 2 5 26 4 23 8 12 19 18 16 24 22 MIN. QFF PRESSURE IN HPA 998.4 1005.8 995.2 999.5 1002.0 996.3 993.1 992.7 999.1 1003.9 1010.8 1003.9 992.7 DAY 10 28 14 24 30 5 4 2 11 4 29 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 860.9 865.2 862.4 864.3 865.3 861.8 860.9 860.3 863.9 866.7 867.8 864.7 863.7 MAX. QFE PRESSURE IN HPA 873.1 874.8 872.7 869.1 869.4 867.8 864.0 865.0 869.5 873.7 872.1 874.2 874.8 DAY 1 5 26 4 2 2 12 27 18 16 24 22 MIN. QFE PRESSURE IN HPA 851.4 856.5 851.1 854.0 860.0 857.7 855.8 855.4 860.3 859.8 863.1 855.7 851.1 DAY 10 20 14 23 30 5 4 2 8 25 1 15 MEAN QNH PRESSURE IN HPA 1008.5 1013.4 1010.2 1012.4 1013.5 1009.5 1008.4 1007.9 1011.9 1015.1 1016.3 1012.8 1011.7 MAX. QNH PRESSURE IN HPA 1022.4 1024.3 1021.9 1017.8 1018.2 1016.3 1012.0 1013.2 1018.3 1023.0 1021.2 1023.6 1024.3 DAY 1 5 26 4 2 2 12 27 18 16 24 22 MIN. QNH PRESSURE IN HPA 997.7 1003.5 997.3 1000.6 1007.5 1004.9 1002.7 1002.2 1007.8 1007.2 1011.0 1002.6 997.3 DAY 10 20 14 23 30 5 4 2 8 25 1 15 MEAN QFF PRESSURE IN HPA 1012.0 1017.0 1010.6 1009.1 1007.5 1001.8 997.6 997.6 1003.2 1009.9 1014.7 1014.2 1007.9 MAX. QFF PRESSURE IN HPA 1028.1 1032.8 1023.1 1016.8 1012.7 1011.1 1002.9 1004.1 1010.2 1017.1 1019.7 1026.9 1032.8 DAY 1 5 26 4 2 1 12 19 18 27 24 22 MIN. QFF PRESSURE IN HPA 998.8 1003.6 995.3 997.6 1001.8 997.0 992.3 990.8 998.6 1002.1 1009.3 1002.3 990.8 DAY 10 20 14 23 30 30 4 2 11 3 1 15 ======================================================================================================================= 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 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 861.3 865.2 862.3 864.1 865.0 861.3 860.2 860.0 863.5 866.7 868.1 865.1 863.6 MAX. QFE PRESSURE IN HPA 873.3 874.5 872.2 869.0 868.9 867.5 863.9 864.1 869.2 873.6 872.3 874.0 874.5 DAY 1 4 26 4 23 1 12 27 18 15 24 22 MIN. QFE PRESSURE IN HPA 851.1 856.9 851.6 853.6 860.2 857.4 855.5 855.2 859.5 860.2 863.4 856.2 851.1 DAY 15 20 9 23 16 14 4 2 8 25 1 15 MEAN QNH PRESSURE IN HPA 1008.9 1013.4 1010.1 1012.1 1013.2 1009.0 1007.7 1007.4 1011.4 1015.1 1016.6 1013.2 1011.5 MAX. QNH PRESSURE IN HPA 1022.6 1024.0 1021.3 1017.7 1017.6 1016.0 1011.9 1012.1 1017.9 1022.9 1021.5 1023.4 1024.0 DAY 1 4 26 4 23 1 12 27 18 15 24 22 MIN. QNH PRESSURE IN HPA 997.3 1003.9 997.9 1000.2 1007.7 1004.5 1002.4 1002.0 1006.9 1007.7 1011.3 1003.2 997.3 DAY 15 20 9 23 16 14 4 2 8 25 1 15 MEAN QFF PRESSURE IN HPA 1013.5 1018.1 1011.2 1009.4 1007.7 1001.8 997.6 998.0 1003.9 1010.8 1016.0 1015.4 1008.6 MAX. QFF PRESSURE IN HPA 1029.8 1033.8 1023.4 1017.4 1012.1 1010.5 1003.0 1003.7 1011.0 1017.8 1021.4 1026.8 1033.8 DAY 1 5 26 4 2 1 12 19 18 27 24 22 MIN. QFF PRESSURE IN HPA 999.9 1004.5 997.6 998.1 1002.1 996.4 992.9 992.3 998.9 1001.8 1010.3 1003.2 992.3 DAY 15 28 10 23 16 30 4 2 8 3 1 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 861.6 865.6 863.0 864.7 865.4 862.0 860.7 860.6 864.3 867.3 868.5 865.3 864.1 MAX. QFE PRESSURE IN HPA 873.7 875.0 872.9 869.0 870.0 869.0 864.2 864.5 869.8 874.0 872.6 874.6 875.0 DAY 1 4 26 4 2 1 12 27 18 15 24 22 MIN. QFE PRESSURE IN HPA 850.9 858.1 851.2 853.6 861.0 857.7 855.8 856.0 860.3 860.7 864.2 856.3 850.9 DAY 15 20 9 23 16 15 4 2 11 3 1 15 MEAN QNH PRESSURE IN HPA 1009.3 1013.8 1010.9 1012.8 1013.6 1009.7 1008.3 1008.2 1012.3 1015.8 1017.2 1013.5 1012.1 MAX. QNH PRESSURE IN HPA 1023.0 1024.5 1022.1 1017.7 1018.8 1017.7 1012.2 1012.6 1018.6 1023.4 1021.8 1024.1 1024.5 DAY 1 4 26 4 2 1 12 27 18 15 24 22 MIN. QNH PRESSURE IN HPA 997.1 1005.3 997.5 1000.2 1008.6 1004.9 1002.7 1002.9 1007.8 1008.3 1012.2 1003.3 997.1 DAY 15 20 9 23 16 15 4 2 11 3 1 15 MEAN QFF PRESSURE IN HPA 1014.2 1018.6 1011.7 1009.5 1007.7 1002.2 997.3 998.4 1004.1 1011.2 1016.5 1015.8 1008.9 MAX. QFF PRESSURE IN HPA 1030.1 1035.0 1023.6 1016.9 1012.7 1012.1 1003.7 1004.9 1010.7 1018.0 1021.2 1028.2 1035.0 DAY 1 6 26 4 2 1 12 18 18 27 21 22 MIN. QFF PRESSURE IN HPA 999.9 1005.9 998.0 997.8 1002.3 996.3 991.9 991.9 998.5 1002.0 1011.0 1003.7 991.9 DAY 15 28 10 23 16 28 4 1 11 3 1 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 861.6 865.7 863.1 864.8 865.9 862.6 861.2 861.1 864.6 867.7 868.6 865.2 864.3 MAX. QFE PRESSURE IN HPA 873.2 875.3 873.1 869.0 870.5 869.2 864.9 865.3 869.9 874.3 872.6 874.6 875.3 DAY 1 4 26 4 22 1 25 26 18 15 24 22 MIN. QFE PRESSURE IN HPA 851.2 858.1 851.2 853.4 862.0 858.5 856.7 856.7 860.3 860.8 864.1 858.5 851.2 DAY 15 20 9 23 29 14 4 1 8 24 1 15 MEAN QNH PRESSURE IN HPA 1009.3 1014.0 1011.0 1012.9 1014.2 1010.4 1008.9 1008.7 1012.7 1016.2 1017.3 1013.4 1012.4 MAX. QNH PRESSURE IN HPA 1022.5 1024.9 1022.4 1017.7 1019.4 1017.9 1013.0 1013.5 1018.7 1023.7 1021.8 1024.1 1024.9 DAY 1 4 26 4 22 1 25 26 18 15 24 22 MIN. QNH PRESSURE IN HPA 997.5 1005.3 997.5 1000.0 1009.7 1005.8 1003.7 1003.7 1007.8 1008.4 1012.1 1005.8 997.5 DAY 15 20 9 23 29 14 4 1 8 24 1 15 MEAN QFF PRESSURE IN HPA 1012.9 1017.7 1011.4 1009.4 1007.9 1002.6 998.0 998.4 1003.7 1010.6 1015.8 1014.8 1008.6 MAX. QFF PRESSURE IN HPA 1028.5 1033.1 1023.6 1016.5 1012.4 1012.2 1006.6 1005.4 1010.5 1017.7 1020.0 1027.8 1033.1 DAY 1 6 26 3 2 1 12 18 17 14 17 22 MIN. QFF PRESSURE IN HPA 1000.8 1005.5 996.8 997.5 1003.6 996.7 993.3 992.3 998.2 1001.5 1010.0 1004.7 992.3 DAY 15 20 13 23 29 28 4 1 8 3 1 11 ======================================================================================================================= 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 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.4 -2.1 6.8 10.0 17.1 22.5 23.9 25.5 19.3 13.4 5.6 4.0 12.0 MINIMUN AIR TEMPERATURE (C) -4.7 -5.9 3.3 5.2 10.8 14.5 16.7 17.9 12.2 8.8 1.0 0.2 6.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 20 18 0 0 0 0 0 0 0 0 0 0 38 DAYS WITH FREEZING MIN.<= 0 31 27 4 2 0 0 0 0 0 2 16 19 101 TEMPERATURE RECORDS LOWEST(C) -14.0 -15.0 -1.0 0.0 7.0 10.0 13.0 14.0 8.0 -1.0 -2.0 -3.0 -15.0 DAY 31 4 24 13 8 1 6 31 14 30 15 10 MAXIMUM AIR TEMPERATURE (C) 1.4 3.1 11.4 14.9 23.4 29.5 30.6 32.3 26.1 19.1 12.6 10.2 17.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 16 20 29 9 0 0 0 74 DAYS WITH MAXIMUM TEMP. <= 0 11 6 0 0 0 0 0 0 0 0 0 0 17 TEMPERATURE RECORDS HIGHEST(C) 8.0 14.0 19.0 24.0 28.0 34.0 34.0 36.0 33.0 27.0 17.0 15.0 36.0 DAY 27 27 28 27 22 11 14 22 5 2 6 22 DIF. BETWEEN (MAX.-MIN.) (C) 6.1 9.0 8.1 9.7 12.6 15.0 13.9 14.4 13.9 10.3 11.6 10.0 11.2 MEAN DAILY TEMP. (MDT) (C) -1.7 -1.4 7.4 10.0 17.1 22.0 23.6 25.1 19.1 14.0 6.8 5.2 12.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 46.0 83.0 127.0 21.0 0.0 0.0 0.0 277.0 HEATING DEG. DAYS(BASE 18 0C) 610.0 543.0 329.5 238.5 46.0 2.0 0.0 0.0 27.0 133.0 336.0 397.0 2662.0 DEWPOINT (MEAN C) -5.5 -5.7 1.6 2.7 7.7 9.0 10.6 10.7 7.6 7.1 0.9 -0.9 3.8 MIXING RATIO (G/KG) 3.02 3.05 5.03 5.59 7.77 8.55 9.50 9.58 7.66 7.58 4.79 4.21 6.36 VAPOUR PRESSURE (HPA) 4.17 4.21 6.90 7.68 10.66 11.69 12.95 13.08 10.53 10.43 6.64 5.82 8.73 SATURATION DEF. (HPA) 1.09 1.36 3.35 5.26 9.65 16.86 17.76 20.77 13.21 5.58 2.74 2.53 8.35 RELATIVE HUMIDITY (MEAN %) 80 77 72 64 56 45 45 42 50 69 73 72 62 RELATIVE HUMIDITY (MAX. %) 90 89 89 81 78 67 63 60 67 86 89 87 79 RELATIVE HUMIDITY (MIN. %) 68 61 56 48 39 28 32 28 34 51 55 55 46 RELATIVE HUMIDITY (MEAN% 03UTC) 82 82 85 76 74 66 62 59 66 80 86 81 75 RELATIVE HUMIDITY (MEAN% 09UTC) 75 73 63 54 45 37 37 32 41 60 59 61 53 RELATIVE HUMIDITY (MEAN% 15UTC) 79 72 64 56 47 35 36 32 41 63 68 71 55 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 75.5 19.0 128.7 123.7 66.4 29.0 3.1 2.4 22.2 44.6 14.0 43.8 572.4 DAYS WITH PRECIPITATION >=10 3 0 5 5 1 1 0 0 1 1 1 2 20 DAYS WITH PRECIPITATION >= 5 6 2 7 7 2 2 0 0 2 2 1 3 34 DAYS WITH PRECIPITATION >= 1 14 5 13 13 11 3 1 1 2 11 3 6 83 DAYS WITH PRECIPITATION 17 9 16 17 13 5 2 2 4 18 3 10 116 GREATEST DAILY PRECIPITATION 14.0 8.0 31.0 41.0 44.0 20.0 3.0 2.0 16.0 18.0 10.0 16.0 44.0 DAY 19 20 8 1 7 16 10 26 10 21 2 23 DAY WITH THUNDER STORM 0 0 2 1 2 4 1 0 2 3 0 0 15 DAYS WITH SNOW OR SLEET 15 9 6 2 0 0 0 0 0 0 0 4 36 DAYS WITH DUST 0 1 2 0 0 2 0 0 0 0 0 0 5 WIND DIRECTION (PREVAILING) 225 225 225 225 225 270 45 45 90 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 3.3 3.1 6.4 4.3 4.5 4.3 3.7 4.5 3.8 5.1 2.6 3.6 4.0 PREVAILING WIND PERCENT 20.6 22.4 14.5 21.3 17.0 13.8 15.4 16.2 13.8 14.5 15.1 19.4 15.8 CALMS PERCENT OF WIND 40.9 28.7 41.5 22.9 26.3 27.2 20.6 26.3 36.3 44.0 50.2 48.2 34.5 NO. OF WIND OBSERVATION 247 223 248 240 247 239 247 247 240 248 239 247 2912 VECTOR WIND DIRECTION (MEAN) 223 216 194 180 178 199 356 39 44 187 136 195 193 VECTOR WIND MAGNITUDE(KNOTS) 1.0 1.2 1.0 1.1 0.6 0.5 0.6 0.7 0.4 0.5 0.3 1.0 0.4 WIND STEADINESES (MEAN %) 52.6 54.5 34.5 32.4 20.0 15.2 19.4 21.9 16.0 20.8 20.0 52.6 15.4 WIND SPEED (MEAN KNOTS) 1.9 2.2 2.9 3.4 3.0 3.3 3.1 3.2 2.5 2.4 1.5 1.9 2.6 FASTEST WIND DIRECTION 170 210 270 230 220 360 150 210 200 220 320 160 150 FASTEST WIND SPEED (KNOTS) 15 13 20 15 15 15 29 15 27 18 10 15 29 DAY 6 13 31 1 14 14 16 22 6 29 8 18 DAYS WITH SKY CLEAR (0-2)/8 4 3 2 6 10 25 27 25 21 7 15 11 156 DAYS WITH P.CLOUDY (3-6)/8 3 11 12 10 13 4 4 6 7 12 10 16 108 DAYS WITH CLOUDY (7-8)/8 24 14 17 14 8 1 0 0 2 12 5 4 101 DAYS WITH VISIBILITY =< 2 KM 6 3 7 1 0 0 0 0 1 0 0 1 19 DURATION OF SUNSHINE HOURS 56.8 74.8 107.9 168.1 253.3 343.5 364.7 345.7 275.3 154.6 193.9 169.7 2508.3 ======================================================================================================================= 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 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 864.7 866.0 861.5 862.9 864.4 862.4 861.2 863.0 865.7 866.6 869.3 866.0 864.5 MAX. QFE PRESSURE IN HPA 872.7 876.5 869.5 869.8 873.5 868.2 866.6 872.5 872.9 874.6 875.0 874.2 876.5 DAY-HOUR 9- 9 4- 6 12- 6 22- 6 21- 6 1- 6 6- 6 31- 6 13- 6 10- 6 22- 6 10- 6 MIN. QFE PRESSURE IN HPA 855.1 853.4 849.5 850.1 857.7 853.3 856.1 855.3 857.4 854.4 857.9 856.8 849.5 DAY-HOUR 23-12 8-15 20-15 12-15 14-15 17-15 28-15 14-15 9-12 29-12 8-12 13-12 MEAN QNH PRESSURE IN HPA 1012.8 1014.2 1009.1 1010.8 1012.5 1010.2 1008.9 1010.8 1013.9 1014.9 1018.1 1014.3 1012.5 MAX. QNH PRESSURE IN HPA 1021.9 1026.2 1018.3 1018.6 1022.8 1016.8 1015.0 1021.7 1022.1 1024.1 1024.5 1023.6 1026.2 DAY-HOUR 9- 9 4- 6 12- 6 22- 6 21- 6 1- 6 6- 6 31- 6 13- 6 10- 6 22- 6 10- 6 MIN. QNH PRESSURE IN HPA 1001.9 1000.0 995.5 996.2 1004.9 999.8 1003.0 1002.1 1004.5 1001.1 1005.1 1003.8 995.5 DAY-HOUR 23-12 8-15 20-15 12-15 14-15 17-15 28-15 14-15 9-12 29-12 8-12 13-12 MEAN QFF PRESSURE IN HPA 1017.8 1019.2 1008.5 1008.4 1006.2 1000.9 998.9 1000.1 1006.4 1010.6 1018.4 1015.5 1009.2 MAX. QFF PRESSURE IN HPA 1029.6 1035.9 1020.6 1016.1 1016.8 1010.2 1007.3 1012.7 1017.4 1020.0 1025.9 1027.6 1035.9 DAY-HOUR 9- 6 4- 6 24-18 14-18 21- 3 1- 3 6- 3 31- 9 13- 6 9- 9 22- 6 10- 6 MIN. QFF PRESSURE IN HPA 1004.6 1002.2 993.4 993.9 995.6 991.7 992.2 990.3 994.6 998.6 1002.9 1002.1 990.3 DAY-HOUR 23-12 8-15 20-12 17- 9 14-18 17-12 28-18 14-12 9-12 29-12 8-12 13-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 864.8 866.0 861.6 862.9 864.4 862.7 861.5 863.2 865.8 866.8 869.3 866.1 864.6 MAX. QFE PRESSURE IN HPA 872.1 874.8 868.3 868.7 872.6 867.7 865.0 871.5 871.6 873.4 873.8 872.9 874.8 DAY 9 5 12 22 22 2 6 31 14 10 23 10 MIN. QFE PRESSURE IN HPA 855.5 859.2 852.5 852.4 859.1 856.8 858.2 857.7 859.8 855.6 860.8 858.4 852.4 DAY 23 8 22 13 26 24 28 8 10 29 8 31 MEAN QNH PRESSURE IN HPA 1013.0 1014.3 1009.2 1010.8 1012.5 1010.5 1009.2 1011.1 1014.1 1015.2 1018.1 1014.4 1012.7 MAX. QNH PRESSURE IN HPA 1021.2 1024.3 1016.9 1017.4 1021.8 1016.2 1013.2 1020.5 1020.7 1022.7 1023.2 1022.1 1024.3 DAY 9 5 12 22 22 2 6 31 14 10 23 10 MIN. QNH PRESSURE IN HPA 1002.4 1006.6 998.9 998.8 1006.4 1003.8 1005.4 1004.9 1007.2 1002.5 1008.4 1005.7 998.8 DAY 23 8 22 13 26 24 28 8 10 29 8 31 MEAN QFF PRESSURE IN HPA 1017.5 1018.9 1008.5 1008.5 1006.2 1001.2 999.1 1000.1 1006.4 1010.5 1017.8 1014.9 1009.1 MAX. QFF PRESSURE IN HPA 1028.5 1033.0 1019.2 1015.1 1015.5 1008.7 1004.9 1011.3 1016.0 1018.4 1023.3 1024.2 1033.0 DAY 9 5 25 4 21 1 6 31 14 10 23 10 MIN. QFF PRESSURE IN HPA 1006.0 1007.1 996.7 997.5 998.9 993.8 994.0 993.1 997.4 999.0 1005.9 1005.7 993.1 DAY 23 28 21 17 26 24 28 8 9 29 8 13 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 864.6 865.8 861.4 862.9 864.6 863.0 862.0 863.7 866.2 866.8 869.3 866.0 864.7 MAX. QFE PRESSURE IN HPA 872.1 874.7 868.6 868.9 873.1 868.0 866.0 871.8 871.9 873.4 873.8 872.9 874.7 DAY 9 4 12 22 21 1 6 31 13 10 23 10 MIN. QFE PRESSURE IN HPA 855.2 857.4 851.7 852.2 858.9 857.7 858.4 858.2 860.2 855.5 859.9 858.0 851.7 DAY 23 13 20 13 26 18 28 8 9 29 8 31 MEAN QNH PRESSURE IN HPA 1012.7 1014.1 1009.1 1010.8 1012.7 1010.8 1009.8 1011.7 1014.5 1015.2 1018.1 1014.3 1012.8 MAX. QNH PRESSURE IN HPA 1021.2 1024.2 1017.2 1017.6 1022.4 1016.6 1014.3 1020.9 1021.0 1022.7 1023.2 1022.1 1024.2 DAY 9 4 12 22 21 1 6 31 13 10 23 10 MIN. QNH PRESSURE IN HPA 1002.0 1004.5 998.0 998.6 1006.2 1004.9 1005.7 1005.4 1007.7 1002.4 1007.4 1005.2 998.0 DAY 23 13 20 13 26 18 28 8 9 29 8 31 MEAN QFF PRESSURE IN HPA 1018.0 1019.3 1008.9 1009.0 1007.1 1002.5 1000.5 1001.7 1008.0 1011.4 1018.9 1015.9 1010.1 MAX. QFF PRESSURE IN HPA 1029.2 1034.1 1018.8 1015.8 1016.8 1010.2 1007.3 1012.7 1017.2 1018.7 1024.8 1025.3 1034.1 DAY 9 4 25 19 21 1 6 31 14 10 23 10 MIN. QFF PRESSURE IN HPA 1005.7 1007.6 996.3 996.6 999.9 995.9 995.2 994.5 998.4 999.2 1005.5 1005.8 994.5 DAY 23 28 20 1 25 24 28 8 9 29 8 13 ======================================================================================================================= 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 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 865.3 866.6 862.1 863.5 865.2 863.3 862.5 864.2 866.8 867.4 870.3 867.0 865.4 MAX. QFE PRESSURE IN HPA 872.6 876.5 869.5 869.8 873.5 868.2 866.6 872.5 872.9 874.6 875.0 874.2 876.5 DAY 9 4 12 22 21 1 6 31 13 10 22 10 MIN. QFE PRESSURE IN HPA 855.6 856.1 851.3 851.4 858.7 858.0 858.8 858.8 860.0 855.5 860.1 858.7 851.3 DAY 23 13 20 17 26 24 28 8 9 29 8 13 MEAN QNH PRESSURE IN HPA 1013.5 1014.9 1009.9 1011.4 1013.4 1011.2 1010.3 1012.3 1015.2 1015.9 1019.2 1015.4 1013.6 MAX. QNH PRESSURE IN HPA 1021.8 1026.2 1018.3 1018.6 1022.8 1016.8 1015.0 1021.7 1022.1 1024.1 1024.5 1023.6 1026.2 DAY 9 4 12 22 21 1 6 31 13 10 22 10 MIN. QNH PRESSURE IN HPA 1002.5 1003.0 997.6 997.7 1006.0 1005.2 1006.1 1006.1 1007.5 1002.4 1007.6 1006.0 997.6 DAY 23 13 20 17 26 24 28 8 9 29 8 13 MEAN QFF PRESSURE IN HPA 1018.9 1020.5 1009.6 1009.0 1006.9 1001.7 1000.2 1001.4 1007.6 1011.7 1020.1 1017.3 1010.4 MAX. QFF PRESSURE IN HPA 1029.6 1035.9 1018.8 1015.6 1016.0 1009.0 1006.4 1012.5 1017.4 1019.6 1025.9 1027.6 1035.9 DAY 9 4 12 4 17 1 6 31 13 10 22 10 MIN. QFF PRESSURE IN HPA 1006.2 1007.0 996.4 994.3 998.4 993.8 994.0 994.5 997.1 1000.1 1006.0 1007.3 993.8 DAY 23 13 20 17 26 24 28 8 9 29 8 13 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 865.2 866.5 862.0 863.2 865.0 862.8 861.9 863.7 866.3 867.2 869.9 866.6 865.0 MAX. QFE PRESSURE IN HPA 872.7 876.4 869.0 869.5 873.4 868.0 865.7 872.4 872.6 874.2 874.8 873.4 876.4 DAY 9 4 12 22 21 1 6 31 13 10 22 10 MIN. QFE PRESSURE IN HPA 855.5 855.1 850.8 850.5 858.6 857.2 858.4 858.2 858.5 855.5 859.3 858.1 850.5 DAY 23 13 20 17 26 17 28 14 9 29 8 13 MEAN QNH PRESSURE IN HPA 1013.4 1014.8 1009.7 1011.2 1013.2 1010.7 1009.7 1011.6 1014.6 1015.6 1018.7 1015.0 1013.2 MAX. QNH PRESSURE IN HPA 1021.9 1026.1 1017.7 1018.3 1022.7 1016.6 1014.0 1021.6 1021.8 1023.6 1024.3 1022.7 1026.1 DAY 9 4 12 22 21 1 6 31 13 10 22 10 MIN. QNH PRESSURE IN HPA 1002.4 1001.9 997.0 996.7 1005.9 1004.3 1005.7 1005.4 1005.8 1002.4 1006.7 1005.3 996.7 DAY 23 13 20 17 26 17 28 14 9 29 8 13 MEAN QFF PRESSURE IN HPA 1018.0 1019.6 1008.6 1008.4 1006.4 1000.7 999.3 1000.5 1006.5 1010.9 1018.6 1015.8 1009.4 MAX. QFF PRESSURE IN HPA 1029.1 1035.7 1018.5 1015.6 1015.6 1007.7 1005.1 1012.7 1017.3 1020.0 1024.5 1024.5 1035.7 DAY 9 4 24 14 21 2 6 31 12 9 23 10 MIN. QFF PRESSURE IN HPA 1005.3 1005.5 994.8 993.9 997.8 995.0 993.4 993.2 994.8 999.6 1004.3 1005.6 993.2 DAY 23 13 20 17 26 24 28 14 9 29 8 13 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 864.1 865.3 860.9 862.5 864.2 861.7 860.6 862.3 864.9 865.8 868.6 865.2 863.8 MAX. QFE PRESSURE IN HPA 871.7 874.9 867.0 868.4 872.8 867.5 864.7 870.8 871.6 873.0 873.4 872.0 874.9 DAY 9 4 12 24 21 1 6 31 13 9 22 10 MIN. QFE PRESSURE IN HPA 855.1 853.6 849.8 851.2 857.8 853.7 857.0 855.7 857.4 854.4 857.9 856.8 849.8 DAY 23 8 20 12 26 17 28 14 9 29 8 13 MEAN QNH PRESSURE IN HPA 1012.1 1013.5 1008.5 1010.3 1012.2 1009.4 1008.2 1010.1 1013.1 1014.1 1017.3 1013.4 1011.8 MAX. QNH PRESSURE IN HPA 1020.8 1024.4 1015.4 1017.0 1022.0 1016.0 1012.8 1019.7 1020.7 1022.3 1022.7 1021.1 1024.4 DAY 9 4 12 24 21 1 6 31 13 9 22 10 MIN. QNH PRESSURE IN HPA 1001.9 1000.2 995.9 997.5 1005.0 1000.3 1004.1 1002.6 1004.5 1001.1 1005.1 1003.8 995.9 DAY 23 8 20 12 26 17 28 14 9 29 8 13 MEAN QFF PRESSURE IN HPA 1016.6 1017.8 1007.7 1007.8 1005.8 1000.0 998.0 999.0 1005.3 1009.4 1016.9 1013.9 1008.2 MAX. QFF PRESSURE IN HPA 1027.8 1033.7 1018.8 1015.0 1015.0 1008.2 1004.5 1010.9 1016.0 1018.3 1022.9 1023.3 1033.7 DAY 9 4 24 14 21 1 6 31 12 9 22 10 MIN. QFF PRESSURE IN HPA 1004.6 1002.4 993.4 995.5 996.8 991.7 992.4 990.3 994.6 998.6 1002.9 1002.1 990.3 DAY 23 8 20 17 24 17 28 14 9 29 8 13 ======================================================================================================================= 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 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 864.3 865.5 860.9 862.5 863.7 861.3 859.9 861.7 864.7 865.8 868.8 865.5 863.7 MAX. QFE PRESSURE IN HPA 871.8 875.2 867.4 867.9 872.1 866.8 863.5 869.7 871.2 873.1 873.4 871.7 875.2 DAY 9 4 24 24 21 1 6 30 13 9 22 10 MIN. QFE PRESSURE IN HPA 855.5 853.4 849.5 850.1 857.7 853.3 856.1 855.3 857.6 856.4 858.4 857.5 849.5 DAY 22 8 20 12 14 17 28 14 9 29 8 31 MEAN QNH PRESSURE IN HPA 1012.4 1013.8 1008.5 1010.3 1011.6 1008.9 1007.4 1009.4 1012.8 1014.1 1017.4 1013.7 1011.7 MAX. QNH PRESSURE IN HPA 1020.9 1024.7 1015.9 1016.5 1021.2 1015.2 1011.5 1018.5 1020.2 1022.4 1022.7 1020.8 1024.7 DAY 9 4 24 24 21 1 6 30 13 9 22 10 MIN. QNH PRESSURE IN HPA 1002.4 1000.0 995.5 996.2 1004.9 999.8 1003.0 1002.1 1004.7 1003.4 1005.7 1004.6 995.5 DAY 22 8 20 12 14 17 28 14 9 29 8 31 MEAN QFF PRESSURE IN HPA 1017.6 1018.8 1008.2 1008.4 1005.8 1000.5 998.0 999.3 1006.2 1010.2 1018.2 1015.2 1008.9 MAX. QFF PRESSURE IN HPA 1028.2 1035.1 1019.7 1015.3 1015.0 1008.4 1004.2 1010.7 1016.1 1018.3 1024.1 1024.0 1035.1 DAY 9 4 24 14 21 1 6 31 13 9 23 11 MIN. QFF PRESSURE IN HPA 1006.3 1002.2 993.6 995.5 997.3 992.3 992.4 991.3 996.0 1001.4 1004.4 1005.9 991.3 DAY 22 8 20 17 24 17 28 14 9 28 8 13 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 864.6 865.9 861.4 863.0 864.1 862.0 860.4 862.4 865.2 866.2 869.2 865.9 864.2 MAX. QFE PRESSURE IN HPA 871.7 875.4 868.3 868.4 872.3 867.3 864.0 870.1 871.2 873.2 873.6 872.2 875.4 DAY 9 4 24 23 21 1 5 30 12 9 22 10 MIN. QFE PRESSURE IN HPA 855.4 855.6 851.7 851.2 857.8 856.5 857.3 855.7 858.8 857.2 858.9 858.6 851.2 DAY 22 8 20 12 14 23 28 14 9 28 8 31 MEAN QNH PRESSURE IN HPA 1012.7 1014.2 1009.1 1010.9 1012.1 1009.8 1008.0 1010.1 1013.4 1014.6 1017.9 1014.2 1012.2 MAX. QNH PRESSURE IN HPA 1020.8 1025.0 1016.9 1017.0 1021.5 1015.8 1012.0 1019.0 1020.2 1022.5 1022.9 1021.3 1025.0 DAY 9 4 24 23 21 1 5 30 12 9 22 10 MIN. QNH PRESSURE IN HPA 1002.2 1002.5 998.0 997.5 1005.0 1003.5 1004.4 1002.6 1006.1 1004.3 1006.2 1005.9 997.5 DAY 22 8 20 12 14 23 28 14 9 28 8 31 MEAN QFF PRESSURE IN HPA 1018.1 1019.6 1008.7 1008.4 1005.5 1000.4 997.8 999.3 1005.8 1010.4 1018.8 1016.1 1009.1 MAX. QFF PRESSURE IN HPA 1028.5 1034.4 1020.6 1016.1 1015.2 1007.5 1003.3 1009.6 1015.7 1018.5 1024.7 1024.8 1034.4 DAY 8 4 24 14 21 1 5 30 11 9 23 10 MIN. QFF PRESSURE IN HPA 1006.1 1005.8 996.7 996.2 995.6 993.6 992.2 991.2 996.4 1001.3 1004.9 1006.7 991.2 DAY 22 8 20 12 14 23 28 14 9 28 8 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 864.7 866.2 861.4 863.1 864.4 862.4 861.0 862.7 865.5 866.5 869.4 866.2 864.5 MAX. QFE PRESSURE IN HPA 871.7 876.0 868.0 868.6 872.8 867.6 864.7 870.6 871.4 873.4 873.8 872.2 876.0 DAY 8 4 11 23 21 1 5 30 12 9 22 9 MIN. QFE PRESSURE IN HPA 855.4 857.2 852.5 851.7 859.1 856.7 858.0 857.1 859.3 856.2 860.0 858.8 851.7 DAY 22 8 20 12 2 23 27 14 9 28 8 30 MEAN QNH PRESSURE IN HPA 1012.8 1014.5 1009.1 1011.0 1012.4 1010.2 1008.6 1010.5 1013.7 1014.8 1018.2 1014.5 1012.5 MAX. QNH PRESSURE IN HPA 1020.8 1025.7 1016.6 1017.2 1022.0 1016.1 1012.8 1019.5 1020.4 1022.7 1023.2 1021.3 1025.7 DAY 8 4 11 23 21 1 5 30 12 9 22 9 MIN. QNH PRESSURE IN HPA 1002.2 1004.3 998.9 998.0 1006.4 1003.7 1005.2 1004.2 1006.7 1003.2 1007.5 1006.1 998.0 DAY 22 8 20 12 2 23 27 14 9 28 8 30 MEAN QFF PRESSURE IN HPA 1017.6 1019.4 1008.1 1008.3 1005.7 1000.6 998.2 999.3 1005.8 1010.3 1018.1 1015.2 1008.9 MAX. QFF PRESSURE IN HPA 1028.4 1035.2 1019.6 1015.0 1015.2 1008.0 1003.9 1010.2 1016.5 1019.1 1023.3 1023.4 1035.2 DAY 8 4 24 14 21 1 5 30 13 9 24 9 MIN. QFF PRESSURE IN HPA 1005.9 1007.6 996.3 997.4 997.5 993.4 993.2 992.2 996.2 999.9 1005.5 1006.5 992.2 DAY 22 8 20 12 14 23 28 14 9 28 8 23 ======================================================================================================================= 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 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.4 2.5 6.3 11.9 15.9 20.5 23.3 23.6 18.1 12.1 8.0 -1.3 11.8 MINIMUN AIR TEMPERATURE (C) -2.8 -2.8 0.7 5.3 7.9 11.4 15.5 15.8 9.7 5.0 2.2 -4.8 5.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 7 10 0 0 0 0 0 0 0 0 0 18 35 DAYS WITH FREEZING MIN.<= 0 23 26 18 1 0 0 0 0 0 0 4 30 102 TEMPERATURE RECORDS LOWEST(C) -14.0 -8.0 -3.0 0.0 3.0 7.0 13.0 10.0 7.0 1.0 -1.0 -13.0 -14.0 DAY 30 1 4 21 9 10 3 28 13 30 1 15 MAXIMUM AIR TEMPERATURE (C) 5.8 9.1 11.8 18.2 22.6 27.9 29.8 30.3 25.6 19.2 14.7 2.7 18.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 14 17 24 2 0 0 0 59 DAYS WITH MAXIMUM TEMP. <= 0 2 0 0 0 0 0 0 0 0 0 0 15 17 TEMPERATURE RECORDS HIGHEST(C) 11.0 13.0 23.0 24.0 30.0 32.0 34.0 34.0 30.0 26.0 22.0 14.0 34.0 DAY 18 13 31 14 22 15 20 13 28 1 3 5 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 11.9 11.1 12.9 14.7 16.5 14.3 14.5 15.9 14.2 12.5 7.5 12.8 MEAN DAILY TEMP. (MDT) (C) 1.5 3.1 6.3 11.7 15.2 19.7 22.7 23.0 17.7 12.1 8.4 -1.0 11.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.5 9.0 53.5 66.5 0.0 0.0 0.0 0.0 131.5 HEATING DEG. DAYS(BASE 18 0C) 462.0 416.5 363.0 187.5 97.0 13.0 0.0 0.0 27.5 185.0 286.5 590.5 2628.5 DEWPOINT (MEAN C) -3.0 -2.8 -0.1 4.6 4.6 6.3 9.7 11.1 5.5 1.6 2.2 -5.4 2.9 MIXING RATIO (G/KG) 3.67 3.67 4.48 6.32 6.32 7.13 8.95 9.87 6.70 5.07 5.22 3.07 5.87 VAPOUR PRESSURE (HPA) 5.09 5.09 6.19 8.72 8.70 9.79 12.23 13.46 9.22 7.03 7.24 4.26 8.08 SATURATION DEF. (HPA) 1.44 2.58 3.79 5.85 10.48 15.57 17.29 16.76 12.66 7.94 3.99 1.63 8.33 RELATIVE HUMIDITY (MEAN %) 79 70 66 64 52 42 45 48 47 52 70 75 59 RELATIVE HUMIDITY (MAX. %) 90 85 83 88 74 61 66 67 68 73 87 87 77 RELATIVE HUMIDITY (MIN. %) 65 51 49 43 34 25 28 30 28 34 49 61 41 RELATIVE HUMIDITY (MEAN% 03UTC) 85 81 79 82 71 58 63 67 67 67 83 82 74 RELATIVE HUMIDITY (MEAN% 09UTC) 69 55 55 53 38 36 36 39 36 38 55 67 48 RELATIVE HUMIDITY (MEAN% 15UTC) 77 61 55 52 40 26 29 30 32 45 65 71 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 47.1 6.4 38.1 40.1 22.2 0.0 11.0 0.0 3.0 7.2 30.1 31.1 236.3 DAYS WITH PRECIPITATION >=10 2 0 2 0 1 0 1 0 0 0 1 1 8 DAYS WITH PRECIPITATION >= 5 4 0 3 3 1 0 1 0 0 0 3 3 18 DAYS WITH PRECIPITATION >= 1 8 3 7 10 6 0 1 0 1 4 5 6 51 DAYS WITH PRECIPITATION 10 4 13 14 8 0 3 0 2 6 8 9 77 GREATEST DAILY PRECIPITATION 10.0 4.4 11.0 8.0 12.0 0.0 11.0 0.0 3.0 3.0 11.0 13.0 13.0 DAY 7 22 24 19 10 ** 24 ** 11 11 29 12 DAY WITH THUNDER STORM 0 0 0 3 5 0 2 1 1 2 0 0 14 DAYS WITH SNOW OR SLEET 5 1 2 0 0 0 0 0 0 0 0 11 19 DAYS WITH DUST 0 0 0 0 2 0 0 0 0 0 0 1 3 WIND DIRECTION (PREVAILING) 90 90 270 270 270 270 45 90 45 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 3.3 3.3 4.0 4.7 7.7 5.2 8.2 8.2 8.0 5.0 3.9 5.0 5.0 PREVAILING WIND PERCENT 11.6 13.9 19.4 18.8 27.5 20.9 25.1 18.2 17.9 33.5 33.3 47.5 21.6 CALMS PERCENT OF WIND 60.9 38.1 21.9 23.8 17.0 13.8 14.2 25.1 22.9 6.5 26.7 31.5 24.8 NO. OF WIND OBSERVATION 225 223 247 239 247 239 247 247 240 248 240 238 2880 VECTOR WIND DIRECTION (MEAN) 101 153 201 192 219 79 49 76 89 236 228 260 190 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.4 1.6 1.2 2.7 1.3 2.5 2.1 0.5 1.6 1.0 2.5 0.4 WIND STEADINESES (MEAN %) 25.0 14.3 38.1 30.0 44.3 22.8 47.2 42.9 10.2 32.0 30.3 69.4 9.5 WIND SPEED (MEAN KNOTS) 1.2 2.8 4.2 4.0 6.1 5.7 5.3 4.9 4.9 5.0 3.3 3.6 4.2 FASTEST WIND DIRECTION 360 180 170 250 250 60 60 60 170 240 160 270 170 FASTEST WIND SPEED (KNOTS) 10 20 25 25 23 18 17 20 20 20 15 22 25 DAY 26 18 10 5 15 10 1 10 24 6 7 5 DAYS WITH SKY CLEAR (0-2)/8 7 9 7 4 17 29 25 28 29 20 15 4 194 DAYS WITH P.CLOUDY (3-6)/8 13 16 11 15 12 1 6 3 1 10 10 8 106 DAYS WITH CLOUDY (7-8)/8 9 3 13 11 2 0 0 0 0 1 5 19 63 DAYS WITH VISIBILITY =< 2 KM 4 1 1 0 1 0 1 0 0 0 0 6 14 DURATION OF SUNSHINE HOURS 110.2 195.4 139.8 199.1 311.4 376.3 357.1 354.0 312.3 271.9 189.1 67.2 2883.8 ======================================================================================================================= 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 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 866.6 867.2 866.3 868.1 865.3 864.0 862.5 861.9 866.0 869.0 870.5 869.4 866.4 MAX. QFE PRESSURE IN HPA 872.3 874.5 874.6 876.3 869.9 870.4 866.2 868.2 873.7 875.7 877.7 879.9 879.9 DAY-HOUR 3- 6 16- 6 5- 6 22- 6 12-18 11- 6 23- 3 29- 6 18- 6 11- 9 14- 6 30- 6 MIN. QFE PRESSURE IN HPA 856.4 853.8 855.7 851.0 859.3 858.9 857.9 856.2 860.2 861.3 866.0 853.1 851.0 DAY-HOUR 22-12 18-18 19- 3 19-12 15-15 29-15 10-15 15-15 8-12 14- 3 3-15 10-18 MEAN QNH PRESSURE IN HPA 1015.0 1015.7 1014.6 1016.7 1013.5 1012.0 1010.3 1009.6 1014.2 1017.6 1019.4 1018.2 1014.7 MAX. QNH PRESSURE IN HPA 1021.5 1024.0 1024.1 1026.0 1018.7 1019.3 1014.5 1016.8 1023.0 1025.3 1027.6 1030.1 1030.1 DAY-HOUR 3- 6 16- 6 5- 6 22- 6 12-18 11- 6 23- 3 29- 6 18- 6 11- 9 14- 6 30- 6 MIN. QNH PRESSURE IN HPA 1003.4 1000.4 1002.6 997.2 1006.7 1006.2 1005.1 1003.2 1007.7 1008.9 1014.3 999.6 997.2 DAY-HOUR 22-12 18-18 19- 3 19-12 15-15 29-15 10-15 15-15 8-12 14- 3 3-15 10-18 MEAN QFF PRESSURE IN HPA 1018.3 1017.8 1014.6 1013.3 1007.9 1004.0 1000.7 999.7 1007.5 1014.2 1018.4 1022.5 1011.6 MAX. QFF PRESSURE IN HPA 1029.3 1028.6 1025.0 1025.7 1016.8 1015.0 1006.8 1008.5 1018.0 1023.3 1028.5 1038.2 1038.2 DAY-HOUR 28-18 3- 6 5- 6 22- 0 9- 3 11- 6 24- 6 30- 6 18- 6 11-15 14- 6 30- 6 MIN. QFF PRESSURE IN HPA 1004.6 1000.4 1000.9 993.6 999.6 996.2 994.9 991.5 999.5 1001.8 1010.1 1002.0 991.5 DAY-HOUR 22-12 18-18 18-15 19-12 15-12 29-15 10-15 15-18 7-15 6- 9 3-18 10-18 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 866.5 867.1 866.4 868.1 865.3 864.3 862.7 862.3 866.1 868.7 870.5 869.4 866.5 MAX. QFE PRESSURE IN HPA 871.6 873.3 872.6 875.7 869.5 869.6 865.3 866.9 872.0 874.1 875.6 879.1 879.1 DAY 3 6 6 22 22 11 23 1 18 12 14 31 MIN. QFE PRESSURE IN HPA 857.4 856.0 855.8 856.3 860.0 859.9 859.1 857.2 861.4 861.9 866.2 858.0 855.8 DAY 22 19 19 19 16 30 13 27 2 14 28 11 MEAN QNH PRESSURE IN HPA 1014.9 1015.6 1014.8 1016.7 1013.5 1012.4 1010.6 1010.1 1014.4 1017.4 1019.4 1018.1 1014.8 MAX. QNH PRESSURE IN HPA 1020.7 1022.6 1021.8 1025.3 1018.3 1018.4 1013.5 1015.3 1021.1 1023.5 1025.2 1029.2 1029.2 DAY 3 6 6 22 22 11 23 1 18 12 14 31 MIN. QNH PRESSURE IN HPA 1004.5 1002.9 1002.7 1003.3 1007.5 1007.4 1006.4 1004.3 1009.1 1009.6 1014.5 1005.2 1002.7 DAY 22 19 19 19 16 30 13 27 2 14 28 11 MEAN QFF PRESSURE IN HPA 1017.7 1017.4 1014.5 1013.3 1008.1 1004.5 1000.9 1000.0 1007.5 1013.7 1018.0 1022.1 1011.5 MAX. QFF PRESSURE IN HPA 1027.5 1025.5 1022.3 1025.7 1016.0 1013.4 1004.2 1005.9 1015.7 1022.2 1024.3 1035.7 1035.7 DAY 29 3 26 22 9 11 24 30 18 12 14 31 MIN. QFF PRESSURE IN HPA 1006.8 1002.7 1002.1 998.4 1000.9 996.7 996.5 994.4 1000.2 1002.4 1012.3 1009.7 994.4 DAY 22 19 19 19 15 30 10 27 30 1 4 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.3 867.1 866.3 868.3 865.5 864.9 863.3 862.9 866.6 869.1 870.6 869.3 866.7 MAX. QFE PRESSURE IN HPA 871.6 873.3 873.0 875.7 869.6 870.3 866.2 867.7 872.6 874.1 876.2 878.8 878.8 DAY 3 16 5 22 22 11 23 1 18 12 14 31 MIN. QFE PRESSURE IN HPA 856.7 856.6 855.7 855.3 860.5 861.4 859.8 857.8 861.5 861.3 867.0 859.6 855.3 DAY 22 19 19 19 15 30 13 27 30 14 28 11 MEAN QNH PRESSURE IN HPA 1014.6 1015.6 1014.7 1016.9 1013.8 1013.0 1011.2 1010.8 1014.9 1017.8 1019.5 1018.1 1015.1 MAX. QNH PRESSURE IN HPA 1020.7 1022.6 1022.3 1025.3 1018.4 1019.2 1014.5 1016.2 1021.8 1023.5 1025.9 1028.8 1028.8 DAY 3 16 5 22 22 11 23 1 18 12 14 31 MIN. QNH PRESSURE IN HPA 1003.7 1003.6 1002.6 1002.1 1008.0 1009.1 1007.2 1005.0 1009.2 1008.9 1015.4 1007.0 1002.1 DAY 22 19 19 19 15 30 13 27 30 14 28 11 MEAN QFF PRESSURE IN HPA 1018.4 1018.2 1015.1 1014.0 1008.8 1005.0 1001.6 1001.2 1008.9 1015.3 1019.1 1023.1 1012.4 MAX. QFF PRESSURE IN HPA 1028.2 1026.2 1023.9 1025.2 1016.8 1013.5 1004.9 1006.5 1017.2 1022.6 1026.2 1035.8 1035.8 DAY 29 3 5 22 9 11 24 29 18 12 14 31 MIN. QFF PRESSURE IN HPA 1006.0 1004.8 1002.2 998.1 1001.1 998.5 997.7 995.4 1001.3 1004.5 1014.5 1010.1 995.4 DAY 22 19 19 19 27 30 10 27 30 14 28 10 ======================================================================================================================= 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 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 867.1 868.0 867.1 869.0 866.0 865.1 863.7 863.3 867.2 870.1 871.6 870.2 867.4 MAX. QFE PRESSURE IN HPA 872.3 874.5 874.6 876.3 869.9 870.4 866.2 868.2 873.7 875.5 877.7 879.9 879.9 DAY 3 16 5 22 22 11 31 29 18 11 14 30 MIN. QFE PRESSURE IN HPA 857.6 858.6 856.7 854.1 860.1 861.7 860.4 858.3 862.0 862.8 867.8 858.8 854.1 DAY 22 19 19 19 15 30 13 27 30 6 27 10 MEAN QNH PRESSURE IN HPA 1015.5 1016.6 1015.6 1017.7 1014.3 1013.3 1011.7 1011.2 1015.6 1019.0 1020.6 1019.0 1015.8 MAX. QNH PRESSURE IN HPA 1021.5 1024.0 1024.1 1026.0 1018.7 1019.3 1014.5 1016.8 1023.0 1025.1 1027.6 1030.1 1030.1 DAY 3 16 5 22 22 11 31 29 18 11 14 30 MIN. QNH PRESSURE IN HPA 1004.7 1005.9 1003.7 1000.8 1007.6 1009.4 1007.9 1005.5 1009.7 1010.7 1016.3 1006.1 1000.8 DAY 22 19 19 19 15 30 13 27 30 6 27 10 MEAN QFF PRESSURE IN HPA 1019.5 1019.4 1015.7 1014.2 1008.5 1005.2 1002.1 1001.1 1008.8 1015.6 1020.1 1023.5 1012.8 MAX. QFF PRESSURE IN HPA 1028.4 1028.6 1025.0 1025.2 1015.4 1015.0 1006.8 1008.5 1018.0 1022.9 1028.5 1038.2 1038.2 DAY 29 3 5 22 9 11 24 30 18 11 14 30 MIN. QFF PRESSURE IN HPA 1007.1 1007.0 1002.7 996.8 999.8 999.7 997.4 994.7 1001.5 1003.6 1015.5 1009.1 994.7 DAY 22 19 19 19 15 20 10 27 8 6 4 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 867.1 867.7 866.8 868.6 865.6 864.6 863.1 862.5 866.5 869.5 871.0 869.9 866.9 MAX. QFE PRESSURE IN HPA 872.0 873.9 874.2 876.0 869.8 869.9 865.7 867.7 873.5 875.7 877.4 879.8 879.8 DAY 3 3 5 22 12 11 24 29 18 11 14 30 MIN. QFE PRESSURE IN HPA 857.4 857.5 856.5 852.4 860.1 861.0 859.7 857.6 861.3 861.9 867.4 857.6 852.4 DAY 22 18 19 19 15 20 13 27 8 6 27 10 MEAN QNH PRESSURE IN HPA 1015.6 1016.2 1015.2 1017.2 1013.8 1012.7 1011.0 1010.3 1014.8 1018.3 1020.0 1018.7 1015.3 MAX. QNH PRESSURE IN HPA 1021.1 1023.3 1023.6 1025.7 1018.6 1018.7 1014.0 1016.2 1022.8 1025.3 1027.2 1030.0 1030.0 DAY 3 3 5 22 12 11 24 29 18 11 14 30 MIN. QNH PRESSURE IN HPA 1004.5 1004.6 1003.5 998.8 1007.6 1008.6 1007.1 1004.7 1008.9 1009.6 1015.9 1004.7 998.8 DAY 22 18 19 19 15 20 13 27 8 6 27 10 MEAN QFF PRESSURE IN HPA 1018.6 1017.7 1014.9 1013.6 1007.9 1004.6 1001.4 1000.2 1008.0 1014.3 1018.3 1022.3 1011.8 MAX. QFF PRESSURE IN HPA 1026.5 1027.5 1024.3 1025.3 1015.0 1013.7 1006.0 1008.0 1017.5 1022.9 1026.8 1037.6 1037.6 DAY 29 3 5 22 8 11 24 29 18 11 14 30 MIN. QFF PRESSURE IN HPA 1006.4 1004.5 1002.0 995.2 999.7 999.5 997.0 994.5 1000.4 1001.8 1013.8 1007.7 994.5 DAY 22 18 19 19 15 20 10 27 30 6 3 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 866.0 866.6 865.7 867.5 864.7 863.2 861.9 861.0 865.1 868.3 869.8 868.9 865.7 MAX. QFE PRESSURE IN HPA 871.1 872.7 872.5 874.3 868.8 868.0 864.2 866.1 872.2 875.3 876.0 878.5 878.5 DAY 28 6 5 22 12 11 31 29 18 11 14 30 MIN. QFE PRESSURE IN HPA 856.4 857.2 856.1 851.0 859.9 859.6 858.3 856.3 860.2 861.8 866.6 855.6 851.0 DAY 22 18 19 19 15 30 13 27 8 6 3 10 MEAN QNH PRESSURE IN HPA 1014.3 1015.0 1014.0 1016.0 1012.8 1011.1 1009.6 1008.6 1013.3 1016.9 1018.6 1017.6 1014.0 MAX. QNH PRESSURE IN HPA 1020.1 1021.9 1021.7 1023.7 1017.5 1016.6 1012.2 1014.4 1021.3 1024.9 1025.7 1028.5 1028.5 DAY 28 6 5 22 12 11 31 29 18 11 14 30 MIN. QNH PRESSURE IN HPA 1003.4 1004.3 1003.0 997.2 1007.4 1007.0 1005.5 1003.3 1007.7 1009.5 1015.0 1002.5 997.2 DAY 22 18 19 19 15 30 13 27 8 6 3 10 MEAN QFF PRESSURE IN HPA 1017.0 1016.6 1013.5 1012.6 1007.3 1003.1 999.9 998.7 1006.3 1013.2 1017.1 1021.3 1010.6 MAX. QFF PRESSURE IN HPA 1025.6 1025.7 1022.4 1023.7 1014.2 1011.8 1003.3 1005.8 1015.9 1023.1 1025.3 1036.3 1036.3 DAY 28 3 5 22 8 10 24 29 18 11 14 30 MIN. QFF PRESSURE IN HPA 1004.6 1003.5 1002.2 993.6 999.6 996.8 995.3 992.9 999.7 1002.7 1011.4 1006.4 992.9 DAY 22 18 19 19 15 30 10 15 8 6 3 10 ======================================================================================================================= 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 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 866.4 866.7 865.7 867.4 864.5 862.6 861.1 860.3 864.8 868.2 869.7 869.0 865.5 MAX. QFE PRESSURE IN HPA 871.3 872.4 871.9 873.7 868.4 867.6 863.6 865.0 871.8 875.0 876.0 878.7 878.7 DAY 2 6 5 12 12 11 31 29 18 11 14 30 MIN. QFE PRESSURE IN HPA 856.4 855.1 856.1 851.0 859.3 858.9 857.9 856.2 860.4 861.6 866.0 854.6 851.0 DAY 22 18 19 19 15 29 10 15 8 5 3 10 MEAN QNH PRESSURE IN HPA 1014.8 1015.1 1013.9 1015.8 1012.6 1010.4 1008.8 1007.8 1012.9 1016.8 1018.6 1017.7 1013.8 MAX. QNH PRESSURE IN HPA 1020.3 1021.6 1021.0 1023.0 1017.0 1016.1 1011.6 1013.2 1020.9 1024.5 1025.7 1028.7 1028.7 DAY 2 6 5 12 12 11 31 29 18 11 14 30 MIN. QNH PRESSURE IN HPA 1003.4 1001.9 1003.0 997.2 1006.7 1006.2 1005.1 1003.2 1007.9 1009.3 1014.3 1001.3 997.2 DAY 22 18 19 19 15 29 10 15 8 5 3 10 MEAN QFF PRESSURE IN HPA 1018.4 1017.5 1014.1 1012.9 1007.4 1002.3 999.2 998.2 1006.7 1014.1 1018.0 1022.8 1011.0 MAX. QFF PRESSURE IN HPA 1027.9 1025.3 1022.5 1021.5 1014.9 1011.2 1003.0 1004.4 1016.1 1023.3 1026.1 1035.9 1035.9 DAY 28 3 5 22 8 10 24 29 18 11 14 30 MIN. QFF PRESSURE IN HPA 1005.0 1002.0 1000.9 994.0 999.7 996.2 994.9 992.7 999.5 1004.2 1011.5 1004.8 992.7 DAY 22 18 18 19 15 29 10 15 7 5 3 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 866.7 867.2 866.1 867.9 865.3 863.4 861.9 861.1 865.6 868.8 870.4 869.6 866.2 MAX. QFE PRESSURE IN HPA 871.6 872.7 873.0 874.7 869.9 868.4 865.2 866.1 872.1 875.5 875.8 879.3 879.3 DAY 2 5 5 21 12 10 31 29 18 11 14 31 MIN. QFE PRESSURE IN HPA 857.0 853.8 855.9 853.9 860.3 859.1 858.5 856.6 861.0 862.0 866.2 853.1 853.1 DAY 22 18 18 19 15 29 13 15 7 5 3 10 MEAN QNH PRESSURE IN HPA 1015.1 1015.6 1014.4 1016.5 1013.5 1011.4 1009.6 1008.7 1013.9 1017.4 1019.2 1018.4 1014.5 MAX. QNH PRESSURE IN HPA 1020.7 1021.9 1022.3 1024.2 1018.7 1017.0 1013.4 1014.4 1021.2 1025.1 1025.4 1029.4 1029.4 DAY 2 5 5 21 12 10 31 29 18 11 14 31 MIN. QNH PRESSURE IN HPA 1004.1 1000.4 1002.8 1000.5 1007.8 1006.4 1005.8 1003.6 1008.6 1009.7 1014.5 999.6 999.6 DAY 22 18 18 19 15 29 13 15 7 5 3 10 MEAN QFF PRESSURE IN HPA 1019.1 1018.4 1014.4 1013.0 1007.6 1003.2 1000.0 998.7 1007.1 1014.1 1018.7 1023.2 1011.4 MAX. QFF PRESSURE IN HPA 1029.3 1025.5 1023.5 1023.5 1014.4 1012.2 1003.6 1006.1 1015.5 1022.9 1025.6 1036.9 1036.9 DAY 28 6 5 21 8 10 23 29 17 11 14 31 MIN. QFF PRESSURE IN HPA 1006.7 1000.4 1001.9 998.4 1000.7 997.1 995.7 991.5 999.8 1003.2 1010.1 1002.0 991.5 DAY 22 18 18 19 26 29 13 15 7 5 3 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 866.8 867.3 866.4 868.1 865.4 864.0 862.4 861.8 866.0 869.0 870.4 869.3 866.4 MAX. QFE PRESSURE IN HPA 871.6 873.6 872.9 875.7 869.9 869.4 865.0 866.5 872.3 875.2 875.1 878.6 878.6 DAY 2 5 5 21 21 10 22 29 18 11 13 30 MIN. QFE PRESSURE IN HPA 857.2 856.0 855.9 856.0 860.1 859.3 859.1 857.7 861.2 862.4 866.3 853.6 853.6 DAY 22 18 18 19 15 29 12 26 1 5 27 10 MEAN QNH PRESSURE IN HPA 1015.2 1015.8 1014.7 1016.6 1013.7 1012.0 1010.2 1009.5 1014.3 1017.7 1019.3 1018.0 1014.7 MAX. QNH PRESSURE IN HPA 1020.7 1022.9 1022.1 1025.3 1018.7 1018.2 1013.2 1014.9 1021.5 1024.7 1024.6 1028.6 1028.6 DAY 2 5 5 21 21 10 22 29 18 11 13 30 MIN. QNH PRESSURE IN HPA 1004.3 1002.9 1002.8 1002.9 1007.6 1006.7 1006.4 1004.9 1008.8 1010.2 1014.6 1000.2 1000.2 DAY 22 18 18 19 15 29 12 26 1 5 27 10 MEAN QFF PRESSURE IN HPA 1018.1 1017.5 1014.4 1013.1 1007.9 1004.2 1000.5 999.5 1007.3 1014.0 1017.6 1021.9 1011.3 MAX. QFF PRESSURE IN HPA 1027.9 1024.4 1022.7 1025.2 1015.7 1013.2 1004.1 1006.4 1015.3 1022.8 1023.5 1035.2 1035.2 DAY 28 6 5 21 8 10 23 29 17 11 13 29 MIN. QFF PRESSURE IN HPA 1007.0 1002.3 1001.7 1000.3 1001.0 997.9 995.4 994.7 1000.2 1002.5 1012.0 1002.7 994.7 DAY 22 18 18 18 26 29 13 15 29 5 3 10 ======================================================================================================================= 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 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -6.3 -1.8 8.4 9.6 16.1 18.9 24.3 22.4 19.4 11.8 6.2 -1.4 10.6 MINIMUN AIR TEMPERATURE (C) -10.1 -9.3 0.4 3.9 8.6 11.7 16.4 15.1 11.0 5.2 1.0 -4.9 4.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 26 24 1 0 0 0 0 0 0 0 0 17 68 DAYS WITH FREEZING MIN.<= 0 31 27 16 4 0 0 0 0 0 1 13 28 120 TEMPERATURE RECORDS LOWEST(C) -20.0 -19.0 -6.0 -2.0 5.0 7.0 13.0 11.0 8.0 -1.0 -3.0 -12.0 -20.0 DAY 28 14 16 3 12 5 10 23 28 9 6 17 MAXIMUM AIR TEMPERATURE (C) -3.5 3.4 12.9 14.2 22.8 25.6 31.4 29.5 28.2 18.9 12.2 3.5 16.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 2 24 13 9 0 0 0 48 DAYS WITH MAXIMUM TEMP. <= 0 27 5 0 0 0 0 0 0 0 0 0 6 38 TEMPERATURE RECORDS HIGHEST(C) 1.0 10.0 18.0 23.0 26.0 30.0 35.0 32.0 32.0 24.0 18.0 13.0 35.0 DAY 1 26 18 29 6 21 10 4 9 15 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 6.6 12.7 12.5 10.3 14.2 13.9 15.0 14.4 17.2 13.7 11.2 8.4 12.5 MEAN DAILY TEMP. (MDT) (C) -6.8 -3.0 6.6 9.0 15.7 18.6 23.9 22.3 19.6 12.0 6.6 -0.7 10.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.5 90.0 43.5 9.0 0.0 0.0 0.0 143.0 HEATING DEG. DAYS(BASE 18 0C) 769.5 587.0 352.0 268.5 70.5 16.5 0.0 0.0 6.5 185.0 342.0 580.0 3177.5 DEWPOINT (MEAN C) -9.3 -7.4 -2.3 3.2 7.2 7.8 9.4 9.5 4.8 3.2 0.8 -6.4 1.7 MIXING RATIO (G/KG) 2.31 2.75 3.81 5.69 7.53 7.85 8.85 8.78 6.36 5.64 4.75 2.97 5.61 VAPOUR PRESSURE (HPA) 3.24 3.81 5.28 7.83 10.35 10.75 12.08 12.01 8.78 7.82 6.59 4.11 7.72 SATURATION DEF. (HPA) 0.79 1.96 6.21 4.64 8.69 12.03 19.58 16.16 15.37 6.76 3.23 1.73 8.10 RELATIVE HUMIDITY (MEAN %) 79 67 50 67 60 52 42 47 41 59 71 70 59 RELATIVE HUMIDITY (MAX. %) 84 82 72 86 83 75 64 67 58 80 88 84 77 RELATIVE HUMIDITY (MIN. %) 72 55 36 49 38 32 25 28 22 38 50 54 42 RELATIVE HUMIDITY (MEAN% 03UTC) 82 81 70 82 79 70 58 63 53 76 84 76 73 RELATIVE HUMIDITY (MEAN% 09UTC) 77 60 43 59 45 38 30 35 31 43 56 59 48 RELATIVE HUMIDITY (MEAN% 15UTC) 77 66 41 56 45 36 27 29 26 45 64 69 48 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 12.9 21.2 6.2 84.0 34.6 2.4 3.2 0.0 0.0 12.5 43.3 55.6 275.9 DAYS WITH PRECIPITATION >=10 0 1 0 3 1 0 0 0 0 0 2 1 8 DAYS WITH PRECIPITATION >= 5 0 1 0 7 2 0 0 0 0 1 3 3 17 DAYS WITH PRECIPITATION >= 1 7 5 2 11 10 1 1 0 0 3 4 8 52 DAYS WITH PRECIPITATION 14 8 8 18 15 5 3 0 0 5 6 14 96 GREATEST DAILY PRECIPITATION 4.0 10.4 3.0 20.0 10.0 1.0 3.0 0.0 0.0 8.0 18.0 31.0 31.0 DAY 16 5 27 10 23 5 30 ** ** 25 17 7 DAY WITH THUNDER STORM 0 0 0 1 8 5 1 0 0 1 0 0 16 DAYS WITH SNOW OR SLEET 12 4 0 1 0 0 0 0 0 0 0 10 27 DAYS WITH DUST 0 0 3 0 0 3 3 1 0 0 0 0 10 WIND DIRECTION (PREVAILING) 270 270 270 270 270 45 45 45 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 4.9 3.4 9.6 6.7 6.5 7.8 9.2 8.0 5.0 7.2 4.6 5.4 5.9 PREVAILING WIND PERCENT 38.4 24.3 25.2 16.3 24.3 18.4 17.8 23.1 30.1 33.7 16.3 31.6 21.9 CALMS PERCENT OF WIND 46.3 42.9 21.3 27.2 27.5 30.1 33.6 27.9 25.5 19.9 56.1 46.6 33.5 NO. OF WIND OBSERVATION 164 140 155 202 247 239 247 247 239 246 239 247 2612 VECTOR WIND DIRECTION (MEAN) 267 250 215 164 209 32 38 48 172 253 247 243 237 VECTOR WIND MAGNITUDE(KNOTS) 2.0 0.5 3.1 1.9 0.8 1.7 2.6 2.7 0.6 2.0 0.3 2.1 0.4 WIND STEADINESES (MEAN %) 80.0 19.2 45.6 32.8 15.4 33.3 51.0 52.9 13.6 33.9 14.3 65.6 8.9 WIND SPEED (MEAN KNOTS) 2.5 2.6 6.8 5.8 5.2 5.1 5.1 5.1 4.4 5.9 2.1 3.2 4.5 FASTEST WIND DIRECTION 270 30 260 40 150 240 60 30 260 260 270 260 260 FASTEST WIND SPEED (KNOTS) 10 15 25 24 20 22 17 20 20 35 20 20 35 DAY 20 8 4 2 10 21 17 23 28 4 4 8 DAYS WITH SKY CLEAR (0-2)/8 3 9 8 7 16 26 29 31 30 21 15 8 203 DAYS WITH P.CLOUDY (3-6)/8 5 14 15 12 11 4 2 0 0 10 9 14 96 DAYS WITH CLOUDY (7-8)/8 19 5 8 11 4 0 0 0 0 0 6 9 62 DAYS WITH VISIBILITY =< 2 KM 15 4 3 1 1 2 0 0 0 0 0 6 32 DURATION OF SUNSHINE HOURS 41.4 190.0 196.3 166.1 284.0 341.6 377.6 359.5 321.1 249.8 152.8 143.2 2823.4 ======================================================================================================================= 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 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 874.9 864.3 866.6 864.1 865.9 862.8 862.4 863.1 868.4 870.1 870.1 867.1 866.7 MAX. QFE PRESSURE IN HPA 883.0 874.3 874.8 872.9 871.9 869.9 868.8 868.1 875.9 877.8 879.1 877.2 883.0 DAY-HOUR 3- 6 1- 6 3- 6 28- 6 2- 6 17- 6 26- 6 1- 6 23- 6 31- 6 20- 6 11- 6 MIN. QFE PRESSURE IN HPA 860.7 850.1 856.3 851.9 858.8 858.1 856.7 858.3 862.6 859.3 859.7 853.3 850.1 DAY-HOUR 14-12 10- 3 14-12 13- 3 11-15 21-15 4-15 10-15 6-15 8-12 18- 3 7-12 MEAN QNH PRESSURE IN HPA 1024.4 1012.4 1014.9 1012.1 1014.2 1010.7 1010.2 1011.0 1017.1 1018.9 1018.9 1015.6 1015.0 MAX. QNH PRESSURE IN HPA 1033.6 1023.7 1024.3 1022.1 1021.0 1018.7 1017.5 1016.7 1025.5 1027.7 1029.2 1027.0 1033.6 DAY-HOUR 3- 6 1- 6 3- 6 28- 6 2- 6 17- 6 26- 6 1- 6 23- 6 31- 6 20- 6 11- 6 MIN. QNH PRESSURE IN HPA 1008.3 996.2 1003.3 998.3 1006.1 1005.3 1003.7 1005.5 1010.4 1006.7 1007.1 999.8 996.2 DAY-HOUR 14-12 10- 3 14-12 13- 3 11-15 21-15 4-15 10-15 6-15 8-12 18- 3 7-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1010.1 1008.4 1003.4 1000.1 1001.8 1009.8 1015.7 1018.9 1020.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1019.2 1016.6 1011.6 1008.2 1009.0 1020.4 1027.0 1032.2 1034.0 ****** DAY-HOUR **-** **-** **-** 20- 6 2- 3 17- 6 26- 6 24- 6 23- 6 31- 6 20- 6 11- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** 993.6 999.9 996.3 992.7 995.9 1001.9 1001.9 1007.7 1001.6 ****** DAY-HOUR **-** **-** **-** 13- 3 11-12 21-12 19-15 5-12 6-12 8-12 18-12 7-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 864.0 865.9 863.1 862.5 863.2 868.4 870.0 870.1 867.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 871.2 871.4 868.8 868.0 867.4 874.0 876.7 877.5 876.8 ****** DAY ** ** ** 28 3 17 26 1 23 11 21 11 MIN. QFE PRESSURE IN HPA ****** ****** ****** 852.8 860.5 860.2 858.2 859.3 863.3 863.3 860.6 857.8 ****** DAY ** ** ** 14 12 4 5 10 1 8 18 7 MEAN QNH PRESSURE IN HPA ****** ****** ****** 1012.1 1014.1 1010.9 1010.3 1011.1 1017.0 1018.8 1019.0 1015.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1020.2 1020.4 1017.5 1016.6 1015.9 1023.4 1026.5 1027.4 1026.6 ****** DAY ** ** ** 28 3 17 26 1 23 11 21 11 MIN. QNH PRESSURE IN HPA ****** ****** ****** 999.3 1008.0 1007.7 1005.4 1006.7 1011.2 1011.2 1008.2 1005.0 ****** DAY ** ** ** 14 12 4 5 10 1 8 18 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1009.6 1008.4 1003.6 1000.0 1001.5 1009.3 1015.1 1018.7 1019.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1017.9 1015.7 1009.6 1007.3 1007.1 1017.1 1025.0 1029.0 1032.1 ****** DAY ** ** ** 20 3 17 26 1 23 31 21 11 MIN. QFF PRESSURE IN HPA ****** ****** ****** 997.4 1001.8 999.7 994.9 996.6 1002.5 1005.1 1009.1 1005.4 ****** DAY ** ** ** 14 11 25 5 5 1 8 18 7 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 874.4 864.2 866.7 864.0 866.3 863.6 863.1 863.9 868.9 870.4 870.2 866.9 866.9 MAX. QFE PRESSURE IN HPA 881.6 873.5 873.1 872.0 871.6 869.7 868.2 867.7 874.9 876.8 877.8 876.8 881.6 DAY 3 1 3 28 3 17 26 1 23 11 20 11 MIN. QFE PRESSURE IN HPA 861.1 850.1 858.3 851.9 860.2 859.7 859.4 859.7 864.1 861.7 859.7 857.1 850.1 DAY 14 10 12 13 11 21 5 10 7 8 18 7 MEAN QNH PRESSURE IN HPA 1023.8 1012.3 1015.1 1012.0 1014.6 1011.5 1011.0 1011.9 1017.6 1019.3 1019.1 1015.3 1015.3 MAX. QNH PRESSURE IN HPA 1032.0 1022.8 1022.4 1021.1 1020.7 1018.5 1016.8 1016.2 1024.4 1026.6 1027.7 1026.6 1032.0 DAY 3 1 3 28 3 17 26 1 23 11 20 11 MIN. QNH PRESSURE IN HPA 1008.7 996.2 1005.5 998.3 1007.7 1007.1 1006.8 1007.1 1012.1 1009.4 1007.1 1004.2 996.2 DAY 14 10 12 13 11 21 5 10 7 8 18 7 MEAN QFF PRESSURE IN HPA 1032.4 1018.2 1015.1 1010.4 1009.4 1004.5 1000.9 1002.8 1010.6 1016.5 1019.5 1020.0 1013.4 MAX. QFF PRESSURE IN HPA 1041.9 1030.8 1023.8 1018.5 1016.6 1011.1 1007.7 1007.4 1018.5 1025.9 1030.4 1032.7 1041.9 DAY 24 1 3 20 2 17 26 24 23 31 20 11 MIN. QFF PRESSURE IN HPA 1012.7 999.3 1003.8 993.6 1002.0 999.3 996.1 997.9 1004.0 1004.0 1007.9 1005.5 993.6 DAY 14 10 12 13 11 21 23 10 7 8 18 7 ======================================================================================================================= 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 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 874.9 865.0 867.6 864.8 866.9 863.9 863.6 864.4 869.7 871.2 871.0 867.6 867.5 MAX. QFE PRESSURE IN HPA 883.0 874.3 874.8 872.9 871.9 869.9 868.8 868.1 875.9 877.8 879.1 877.2 883.0 DAY 3 1 3 28 2 17 26 1 23 31 20 11 MIN. QFE PRESSURE IN HPA 861.8 851.8 858.9 851.9 860.5 858.9 859.3 860.4 865.0 861.1 860.6 856.4 851.8 DAY 14 10 12 13 11 21 4 10 7 8 18 7 MEAN QNH PRESSURE IN HPA 1024.4 1013.1 1016.1 1012.9 1015.3 1011.9 1011.5 1012.5 1018.5 1020.2 1020.0 1016.1 1016.0 MAX. QNH PRESSURE IN HPA 1033.6 1023.7 1024.3 1022.1 1021.0 1018.7 1017.5 1016.7 1025.5 1027.7 1029.2 1027.0 1033.6 DAY 3 1 3 28 2 17 26 1 23 31 20 11 MIN. QNH PRESSURE IN HPA 1009.5 998.1 1006.2 998.3 1008.0 1006.2 1006.7 1007.9 1013.2 1008.7 1008.2 1003.4 998.1 DAY 14 10 12 13 11 21 4 10 7 8 18 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1011.2 1009.4 1004.6 1001.6 1003.6 1011.5 1017.3 1020.6 1021.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1019.2 1016.4 1011.6 1008.2 1009.0 1020.4 1027.0 1032.2 1034.0 ****** DAY ** ** ** 20 2 17 26 24 23 31 20 11 MIN. QFF PRESSURE IN HPA ****** ****** ****** 998.1 1001.4 997.0 996.1 998.6 1004.6 1004.9 1008.7 1005.3 ****** DAY ** ** ** 14 11 21 20 5 6 8 18 7 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 874.8 864.8 867.1 864.7 866.4 863.3 863.1 863.9 869.2 870.6 870.6 867.5 867.2 MAX. QFE PRESSURE IN HPA 882.8 874.0 873.8 872.9 871.8 868.7 868.2 867.8 875.5 877.6 878.9 876.6 882.8 DAY 3 1 3 28 3 17 26 7 23 31 20 11 MIN. QFE PRESSURE IN HPA 861.2 852.7 858.7 852.0 860.0 859.0 858.9 860.1 864.5 860.7 860.4 855.4 852.0 DAY 14 27 14 13 11 21 4 10 7 8 18 7 MEAN QNH PRESSURE IN HPA 1024.3 1013.0 1015.6 1012.8 1014.7 1011.3 1011.0 1011.9 1018.0 1019.6 1019.5 1016.0 1015.6 MAX. QNH PRESSURE IN HPA 1033.4 1023.4 1023.2 1022.1 1020.9 1017.4 1016.8 1016.3 1025.1 1027.5 1029.0 1026.3 1033.4 DAY 3 1 3 28 3 17 26 7 23 31 20 11 MIN. QNH PRESSURE IN HPA 1008.8 999.2 1006.0 998.4 1007.5 1006.3 1006.2 1007.6 1012.6 1008.3 1007.9 1002.2 998.4 DAY 14 27 14 13 11 21 4 10 7 8 18 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1011.1 1008.6 1004.0 1000.8 1002.6 1010.7 1016.1 1018.8 1020.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1018.8 1016.2 1010.0 1007.5 1007.5 1019.7 1026.6 1030.3 1031.5 ****** DAY ** ** ** 20 3 17 25 7 23 31 20 11 MIN. QFF PRESSURE IN HPA ****** ****** ****** 999.7 1000.9 997.0 995.7 998.4 1003.7 1003.7 1008.2 1004.0 ****** DAY ** ** ** 14 11 21 4 5 7 8 18 7 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 873.8 863.8 865.8 863.7 865.2 862.0 861.8 862.4 867.8 869.2 869.2 866.5 865.9 MAX. QFE PRESSURE IN HPA 881.6 873.4 871.3 871.5 870.3 867.0 866.7 866.7 874.2 876.1 877.7 875.4 881.6 DAY 3 16 2 28 2 17 25 7 23 31 20 11 MIN. QFE PRESSURE IN HPA 860.7 851.8 856.3 852.0 859.0 858.3 857.5 858.7 862.8 859.3 860.1 853.3 851.8 DAY 14 27 14 13 11 21 4 10 6 8 18 7 MEAN QNH PRESSURE IN HPA 1023.1 1011.8 1014.0 1011.7 1013.4 1009.8 1009.5 1010.2 1016.3 1017.9 1018.0 1014.9 1014.2 MAX. QNH PRESSURE IN HPA 1032.0 1022.7 1020.3 1020.5 1019.2 1015.4 1015.1 1015.1 1023.6 1025.8 1027.6 1025.0 1032.0 DAY 3 16 2 28 2 17 25 7 23 31 20 11 MIN. QNH PRESSURE IN HPA 1008.3 998.1 1003.3 998.4 1006.3 1005.5 1004.6 1006.0 1010.7 1006.7 1007.6 999.8 998.1 DAY 14 27 14 13 11 21 4 10 6 8 18 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1009.6 1007.6 1002.4 999.2 1000.5 1008.6 1014.2 1017.5 1018.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1017.