STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** 7.7 16.5 20.1 28.9 32.3 28.4 24.7 18.6 13.9 6.3 ***** MINIMUN AIR TEMPERATURE (C) ***** ***** 0.7 8.1 12.1 18.3 20.7 18.4 13.7 8.3 5.3 0.1 ***** DAYS WITH MINIMUM TEMP. >=21 **** **** 0 0 0 6 14 3 0 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** **** 3 0 0 0 0 0 0 0 2 2 **** DAYS WITH FREEZING MIN.<= 0 **** **** 15 0 0 0 0 0 0 0 3 19 **** TEMPERATURE RECORDS LOWEST(C) ***** ***** -8.0 2.0 6.0 14.4 17.0 13.5 9.4 5.4 -6.2 -7.0 ***** DAY ** ** 13 2 3 9 27 31 12 29 27 29 MAXIMUM AIR TEMPERATURE (C) ***** ***** 12.4 21.3 24.2 33.0 36.1 32.7 29.1 23.6 18.7 10.1 ***** DAYS WITH MAXIMUM TEMP. >=30 **** **** 0 0 5 27 31 27 14 0 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 **** **** 0 0 0 0 0 0 0 0 0 0 **** TEMPERATURE RECORDS HIGHEST(C)***** ***** 18.5 27.4 31.0 38.0 40.0 37.4 33.2 27.2 22.6 17.0 ***** DAY ** ** 29 15 18 30 5 6 25 4 1 16 DIF. BETWEEN (MAX.-MIN.) (C) ***** ***** 11.7 13.2 12.1 14.7 15.4 14.3 15.4 15.3 13.4 10.0 ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** 6.5 14.7 18.2 25.7 28.4 25.5 21.4 15.9 12.0 5.1 ***** COOLING DEG. DAYS(BASE 21 0C)****** ****** 0.0 0.4 11.4 135.5 230.0 142.4 35.9 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C)****** ****** 355.9 96.8 46.6 0.0 0.0 0.0 0.8 66.8 181.0 399.4 ****** DEWPOINT (MEAN C) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** -1.9 -0.9 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 4.19 4.40 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 5.66 5.92 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 10.99 4.04 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** *** *** *** *** 36 63 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** *** *** *** *** *** 50 75 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** *** *** *** *** *** 28 51 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** *** *** *** *** 50 72 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** *** *** *** *** 30 57 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** *** *** *** *** *** 37 67 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** 17.0 19.9 20.3 0.7 0.0 0.0 0.0 0.0 0.0 25.0 ****** DAYS WITH PRECIPITATION >=10 **** **** 1 1 0 0 0 0 0 0 0 1 **** DAYS WITH PRECIPITATION >= 5 **** **** 1 2 1 0 0 0 0 0 0 1 **** DAYS WITH PRECIPITATION >= 1 **** **** 2 3 6 0 0 0 0 0 0 6 **** DAYS WITH PRECIPITATION **** **** 2 5 7 1 0 0 0 0 0 8 **** GREATEST DAILY PRECIPITATION ****** ****** 14.0 11.0 8.0 0.7 0.0 0.0 0.0 0.0 0.0 11.0 ****** DAY ** ** 21 7 7 8 ** ** ** ** ** 4 DAY WITH THUNDER STORM **** **** 0 3 3 1 0 0 0 0 0 0 **** DAYS WITH SNOW OR SLEET **** **** 0 0 0 0 0 0 0 0 0 2 **** DAYS WITH DUST **** **** 0 7 6 4 1 2 2 2 7 5 **** WIND DIRECTION (PREVAILING) *** *** 90 270 90 270 90 90 270 45 90 180 *** PREVAILING WIND SPEED(KNOTS) **** **** 8.0 8.9 4.8 7.3 6.6 6.4 7.6 6.6 6.3 10.5 **** PREVAILING WIND PERCENT ***** ***** 11.0 23.3 20.0 24.0 36.1 35.1 20.7 20.8 13.3 18.7 ***** CALMS PERCENT OF WIND ***** ***** 61.3 12.7 27.1 16.7 14.2 12.3 20.7 31.8 32.0 34.8 ***** NO. OF WIND OBSERVATION **** **** 155 150 155 150 155 154 150 154 150 155 1528 VECTOR WIND DIRECTION (MEAN) *** *** 218 227 258 309 48 42 339 3 206 183 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** 1.1 3.4 1.3 0.9 2.7 3.5 1.6 1.6 2.4 1.9 **** WIND STEADINESES (MEAN %) ***** ***** 27.5 41.5 22.4 17.3 42.9 57.4 26.7 34.0 38.7 36.5 ***** WIND SPEED (MEAN KNOTS) **** **** 4.0 8.2 5.8 5.2 6.3 6.1 6.0 4.7 6.2 5.2 **** FASTEST WIND DIRECTION *** *** 270 270 280 220 290 10 210 360 180 210 *** FASTEST WIND SPEED (KNOTS) *** *** 27 29 39 19 19 21 23 16 29 23 *** DAY ** ** 7 22 4 8 12 11 25 15 25 27 DAYS WITH SKY CLEAR (0-2)/8 **** **** 18 8 6 25 23 28 28 30 16 12 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** 12 18 20 2 8 3 2 1 13 13 **** DAYS WITH CLOUDY (7-8)/8 **** **** 1 4 5 3 0 0 0 0 1 6 **** DAYS WITH VISIBILITY =< 2 KM **** **** 0 0 1 0 0 0 0 0 2 1 **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** 352.1 321.6 298.6 215.8 175.7 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 845.8 843.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 853.7 849.0 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 4- 6 1- 6 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 835.7 837.8 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 26- 3 19-12 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.2 1016.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1028.3 1022.9 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 4- 6 1- 6 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1007.4 1009.8 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 26- 3 19-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 846.1 843.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 852.2 847.8 ****** DAY ** ** ** ** ** ** ** ** ** ** 4 1 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 835.7 839.1 ****** DAY ** ** ** ** ** ** ** ** ** ** 26 28 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.5 1016.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.6 1021.5 ****** DAY ** ** ** ** ** ** ** ** ** ** 4 1 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1007.4 1011.4 ****** DAY ** ** ** ** ** ** ** ** ** ** 26 28 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.9 1016.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.6 1026.7 ****** DAY ** ** ** ** ** ** ** ** ** ** 18 29 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1002.0 1010.3 ****** DAY ** ** ** ** ** ** ** ** ** ** 26 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 847.0 844.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 853.7 849.0 ****** DAY ** ** ** ** ** ** ** ** ** ** 4 1 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 837.6 840.6 ****** DAY ** ** ** ** ** ** ** ** ** ** 26 28 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.6 1017.4 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1028.3 1022.9 ****** DAY ** ** ** ** ** ** ** ** ** ** 4 1 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.6 1013.1 ****** DAY ** ** ** ** ** ** ** ** ** ** 26 28 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 845.7 843.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 852.5 847.7 ****** DAY ** ** ** ** ** ** ** ** ** ** 4 1 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 836.7 839.4 ****** DAY ** ** ** ** ** ** ** ** ** ** 26 22 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.0 1016.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.9 1021.4 ****** DAY ** ** ** ** ** ** ** ** ** ** 4 1 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1008.6 1011.7 ****** DAY ** ** ** ** ** ** ** ** ** ** 26 22 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 844.7 842.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 851.0 846.4 ****** DAY ** ** ** ** ** ** ** ** ** ** 4 11 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 836.9 837.8 ****** DAY ** ** ** ** ** ** ** ** ** ** 26 19 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1017.9 1015.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.2 1019.9 ****** DAY ** ** ** ** ** ** ** ** ** ** 4 11 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1008.8 1009.8 ****** DAY ** ** ** ** ** ** ** ** ** ** 26 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 845.6 843.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 851.6 847.5 ****** DAY ** ** ** ** ** ** ** ** ** ** 4 1 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 838.8 838.5 ****** DAY ** ** ** ** ** ** ** ** ** ** 25 19 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1018.9 1016.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.9 1021.1 ****** DAY ** ** ** ** ** ** ** ** ** ** 4 1 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.0 1010.7 ****** DAY ** ** ** ** ** ** ** ** ** ** 25 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.3 1016.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1022.6 1023.3 ****** DAY ** ** ** ** ** ** ** ** ** ** 4 29 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1004.8 1010.7 ****** DAY ** ** ** ** ** ** ** ** ** ** 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.5 6.8 10.0 18.0 20.5 26.5 28.0 27.0 23.8 16.7 11.1 8.0 16.6 MINIMUN AIR TEMPERATURE (C) -2.8 0.2 2.8 9.5 13.4 17.6 20.0 18.6 15.5 7.8 3.7 -0.4 8.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 9 2 0 0 0 0 12 DAYS WITH MINIMUM TEMP. <=-4 12 3 0 0 0 0 0 0 0 0 2 2 19 DAYS WITH FREEZING MIN.<= 0 28 13 8 0 0 0 0 0 0 0 7 18 74 TEMPERATURE RECORDS LOWEST(C) -9.0 -7.5 -3.6 4.2 8.0 14.0 16.4 14.4 12.0 1.5 -6.0 -5.2 -9.0 DAY 21 18 14 4 1 6 19 4 29 9 30 1 MAXIMUM AIR TEMPERATURE (C) 6.4 11.5 14.3 22.8 27.3 34.0 34.7 34.2 31.6 22.0 15.6 13.2 22.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 10 27 31 29 24 2 0 0 123 DAYS WITH MAXIMUM TEMP. <= 0 2 0 0 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS HIGHEST(C) 16.0 19.5 20.6 29.0 33.6 38.6 38.6 38.4 35.2 31.8 24.2 18.8 38.6 DAY 28 28 31 21 27 18 4 22 3 1 1 18 DIF. BETWEEN (MAX.-MIN.) (C) 9.2 11.3 11.5 13.3 13.9 16.4 14.7 15.6 16.1 14.2 11.9 13.6 13.5 MEAN DAILY TEMP. (MDT) (C) 1.8 5.8 8.5 16.2 20.3 25.8 27.3 26.4 23.6 14.9 9.7 6.4 15.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.5 32.3 144.1 196.7 167.3 79.1 1.3 0.0 0.0 622.4 HEATING DEG. DAYS(BASE 18 0C) 501.1 341.0 292.9 71.6 14.0 0.0 0.0 0.0 0.0 104.6 250.9 358.9 1935.1 DEWPOINT (MEAN C) -4.1 -2.8 -5.9 -0.3 4.0 0.1 2.9 1.2 -2.1 -3.0 -4.0 -6.2 -1.7 MIXING RATIO (G/KG) 3.48 3.96 3.17 4.73 6.20 4.82 5.74 5.09 4.08 3.82 3.67 2.95 4.31 VAPOUR PRESSURE (HPA) 4.69 5.32 4.26 6.34 8.31 6.45 7.66 6.82 5.48 5.16 4.95 3.99 5.79 SATURATION DEF. (HPA) 3.07 5.04 8.65 15.18 17.06 29.90 31.61 30.60 25.81 14.95 9.17 7.26 16.53 RELATIVE HUMIDITY (MEAN %) 66 54 36 33 37 20 21 20 20 28 38 39 34 RELATIVE HUMIDITY (MAX. %) 76 69 51 51 57 31 31 30 31 38 54 55 48 RELATIVE HUMIDITY (MIN. %) 56 43 25 23 22 12 14 13 12 21 27 27 25 RELATIVE HUMIDITY (MEAN% 03UTC) 74 66 49 50 48 28 29 28 26 37 51 52 45 RELATIVE HUMIDITY (MEAN% 09UTC) 61 47 29 27 26 15 16 14 13 23 32 30 28 RELATIVE HUMIDITY (MEAN% 15UTC) 67 52 33 28 28 14 15 14 15 27 40 43 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 52.0 30.4 7.9 6.6 8.4 0.0 0.1 0.0 0.0 0.0 5.0 0.7 111.1 DAYS WITH PRECIPITATION >=10 3 2 0 0 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 5 3 0 0 0 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 1 8 5 2 3 2 0 0 0 0 0 2 0 22 DAYS WITH PRECIPITATION 13 7 4 6 6 0 1 0 0 0 2 1 40 GREATEST DAILY PRECIPITATION 12.0 11.0 4.0 2.0 3.0 0.0 0.1 0.0 0.0 0.0 3.0 0.7 12.0 DAY 7 3 18 23 5 ** 28 ** ** ** 26 16 DAY WITH THUNDER STORM 0 0 0 1 3 0 0 0 0 0 0 0 4 DAYS WITH SNOW OR SLEET 8 2 0 0 0 0 0 0 0 0 0 0 10 DAYS WITH DUST 0 1 9 4 11 10 7 2 1 2 5 0 52 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 45 270 PREVAILING WIND SPEED(KNOTS) 9.4 8.4 9.0 9.6 8.9 8.9 7.8 6.7 7.2 6.8 7.8 6.1 8.1 PREVAILING WIND PERCENT 16.8 17.9 20.6 22.0 29.1 25.8 23.4 24.2 30.0 21.5 12.0 18.1 22.7 CALMS PERCENT OF WIND 42.6 31.4 18.1 28.0 23.1 27.1 27.4 26.6 27.9 41.2 44.0 43.9 30.8 NO. OF WIND OBSERVATION 155 140 155 150 247 240 248 248 240 177 150 155 2305 VECTOR WIND DIRECTION (MEAN) 231 217 218 231 259 312 354 3 332 339 206 18 264 VECTOR WIND MAGNITUDE(KNOTS) 1.8 2.0 3.0 3.7 2.7 2.0 3.0 2.2 1.1 0.7 2.7 0.8 1.1 WIND STEADINESES (MEAN %) 34.0 33.9 36.1 52.9 38.0 33.9 50.8 41.5 21.2 16.7 46.6 20.5 19.0 WIND SPEED (MEAN KNOTS) 5.3 5.9 8.3 7.0 7.1 5.9 5.9 5.3 5.2 4.2 5.8 3.9 5.8 FASTEST WIND DIRECTION 180 210 200 180 240 240 60 280 270 210 180 180 200 FASTEST WIND SPEED (KNOTS) 25 23 29 29 23 23 19 21 17 17 29 23 29 DAY 8 12 8 27 2 1 4 23 14 1 12 24 DAYS WITH SKY CLEAR (0-2)/8 14 12 10 8 6 25 26 27 29 20 16 17 210 DAYS WITH P.CLOUDY (3-6)/8 9 10 13 16 23 5 5 4 1 11 11 12 120 DAYS WITH CLOUDY (7-8)/8 8 6 8 6 2 0 0 0 0 0 3 2 35 DAYS WITH VISIBILITY =< 2 KM 5 1 0 0 1 2 0 0 0 0 0 0 9 DURATION OF SUNSHINE HOURS 185.0 184.2 100.0 ****** ****** ****** ****** ****** ****** 281.3 217.3 235.7 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 843.2 842.3 841.7 841.3 841.9 839.4 838.9 840.8 842.4 847.6 844.8 846.0 842.5 MAX. QFE PRESSURE IN HPA 851.8 849.0 849.7 848.5 847.1 847.5 844.6 845.6 848.5 853.5 851.1 853.0 853.5 DAY-HOUR 6- 6 9- 6 31- 6 1- 6 9- 6 23- 6 27- 6 31- 6 23- 6 17- 6 21- 6 26- 6 MIN. QFE PRESSURE IN HPA 832.3 834.4 834.0 834.6 836.2 834.1 833.1 833.5 837.5 841.2 835.9 838.3 832.3 DAY-HOUR 8-12 3-12 12-12 13-12 7-12 3-15 12-15 12-15 3-15 3-12 14- 3 4-12 MEAN QNH PRESSURE IN HPA 1016.1 1015.1 1014.4 1013.9 1014.7 1011.7 1011.1 1013.4 1015.2 1021.2 1018.0 1019.4 1015.4 MAX. QNH PRESSURE IN HPA 1026.1 1022.9 1023.7 1022.3 1020.7 1021.1 1017.8 1018.9 1022.3 1028.1 1025.3 1027.5 1028.1 DAY-HOUR 6- 6 9- 6 31- 6 1- 6 9- 6 23- 6 27- 6 31- 6 23- 6 17- 6 21- 6 26- 6 MIN. QNH PRESSURE IN HPA 1003.4 1005.9 1005.4 1006.1 1008.0 1005.5 1004.4 1004.8 1009.5 1013.8 1007.6 1010.4 1003.4 DAY-HOUR 8-12 3-12 12-12 13-12 7-12 3-15 12-15 12-15 3-15 3-12 14- 3 4-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.3 997.9 996.4 999.3 1003.1 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.8 1010.0 1003.8 1006.9 1011.1 ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** 9- 3 23- 3 28- 3 25- 3 23- 6 **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 998.2 991.8 988.9 989.7 995.5 ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** 31-12 18-15 13-15 12-15 3-12 **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 841.8 839.3 838.7 840.5 842.2 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 845.2 846.5 843.0 844.5 846.5 ****** ****** ****** ****** DAY ** ** ** ** 9 23 28 31 24 ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 838.7 835.4 833.7 835.1 838.9 ****** ****** ****** ****** DAY ** ** ** ** 7 4 13 13 14 ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1014.5 1011.6 1010.9 1013.0 1014.9 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.5 1020.0 1015.9 1017.6 1020.0 ****** ****** ****** ****** DAY ** ** ** ** 9 23 28 31 24 ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1010.9 1007.1 1005.1 1006.7 1011.1 ****** ****** ****** ****** DAY ** ** ** ** 7 4 13 13 14 ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.2 998.3 996.4 999.1 1002.7 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1011.6 1009.3 1002.3 1004.7 1009.4 ****** ****** ****** ****** DAY ** ** ** ** 10 23 28 25 24 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 999.5 993.5 989.4 990.8 997.4 ****** ****** ****** ****** DAY ** ** ** ** 21 19 13 23 4 ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 843.2 842.5 841.9 842.1 842.6 840.1 839.4 841.4 842.8 848.2 845.0 846.2 843.0 MAX. QFE PRESSURE IN HPA 850.1 847.4 848.7 847.7 846.6 847.3 843.7 844.9 847.1 852.7 850.2 852.2 852.7 DAY 6 9 31 1 9 23 27 25 23 17 21 27 MIN. QFE PRESSURE IN HPA 832.7 835.1 834.4 836.8 838.7 836.9 834.5 836.1 839.5 843.0 835.9 840.2 832.7 DAY 9 3 22 13 7 4 13 12 14 3 14 5 MEAN QNH PRESSURE IN HPA 1016.1 1015.3 1014.6 1014.8 1015.4 1012.6 1011.8 1014.0 1015.7 1022.0 1018.3 1019.7 1015.8 MAX. QNH PRESSURE IN HPA 1024.2 1021.0 1022.5 1021.4 1020.1 1020.9 1016.7 1018.1 1020.7 1027.2 1024.3 1026.6 1027.2 DAY 6 9 31 1 9 23 27 25 23 17 21 27 MIN. QNH PRESSURE IN HPA 1003.9 1006.7 1005.9 1008.7 1010.9 1008.8 1006.0 1007.9 1011.8 1015.9 1007.6 1012.6 1003.9 DAY 9 3 22 13 7 4 13 12 14 3 14 5 MEAN QFF PRESSURE IN HPA 1019.2 1015.5 1012.8 1007.8 1005.7 999.2 997.5 1000.7 1004.4 1016.4 1016.2 1020.3 1009.6 MAX. QFF PRESSURE IN HPA 1027.6 1023.8 1021.6 1016.5 1013.8 1010.0 1003.8 1006.9 1010.6 1023.8 1026.8 1026.7 1027.6 DAY 6 9 17 1 9 23 28 25 23 8 30 7 MIN. QFF PRESSURE IN HPA 1003.2 1002.6 1002.9 1001.3 999.7 994.8 990.3 992.9 998.7 1007.2 1001.6 1014.9 990.3 DAY 9 3 21 22 29 19 13 12 14 3 14 28 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 844.1 843.5 843.0 842.8 843.1 840.7 840.1 842.1 843.8 849.2 845.9 847.3 843.8 MAX. QFE PRESSURE IN HPA 851.8 849.0 849.7 848.5 847.1 847.5 844.6 845.6 848.5 853.5 851.1 853.0 853.5 DAY 6 9 31 1 9 23 27 31 23 17 21 26 MIN. QFE PRESSURE IN HPA 834.0 837.2 835.1 837.7 839.3 837.1 835.3 836.7 840.3 843.8 837.8 840.7 834.0 DAY 8 3 22 13 7 3 13 12 14 3 14 5 MEAN QNH PRESSURE IN HPA 1017.2 1016.5 1015.9 1015.6 1016.0 1013.2 1012.5 1014.9 1016.9 1023.2 1019.2 1020.9 1016.8 MAX. QNH PRESSURE IN HPA 1026.1 1022.9 1023.7 1022.3 1020.7 1021.1 1017.8 1018.9 1022.3 1028.1 1025.3 1027.5 1028.1 DAY 6 9 31 1 9 23 27 31 23 17 21 26 MIN. QNH PRESSURE IN HPA 1005.4 1009.1 1006.7 1009.7 1011.6 1009.0 1006.9 1008.6 1012.8 1016.8 1009.8 1013.2 1005.4 DAY 8 3 22 13 7 3 13 12 14 3 14 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.3 998.8 997.0 1000.2 1004.1 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.6 1008.8 1002.6 1006.3 1011.1 ****** ****** ****** ****** DAY ** ** ** ** 9 23 27 25 23 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 999.0 994.9 990.4 992.9 998.5 ****** ****** ****** ****** DAY ** ** ** ** 29 18 13 12 14 ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 843.3 842.5 842.0 841.6 842.1 839.8 839.3 841.3 842.9 848.0 844.6 845.8 842.8 MAX. QFE PRESSURE IN HPA 851.3 848.0 848.6 846.7 846.0 846.5 844.3 844.6 847.5 852.6 850.0 851.5 852.6 DAY 6 9 31 1 9 23 27 31 23 17 21 26 MIN. QFE PRESSURE IN HPA 832.7 836.4 834.5 836.1 837.7 836.2 833.9 835.9 839.5 842.3 837.8 838.8 832.7 DAY 8 23 22 13 7 3 13 12 14 3 14 5 MEAN QNH PRESSURE IN HPA 1016.2 1015.3 1014.8 1014.3 1014.8 1012.2 1011.6 1014.0 1015.7 1021.7 1017.8 1019.1 1015.6 MAX. QNH PRESSURE IN HPA 1025.5 1021.7 1022.4 1020.2 1019.4 1020.0 1017.4 1017.8 1021.1 1027.1 1024.0 1025.8 1027.1 DAY 6 9 31 1 9 23 27 31 23 17 21 26 MIN. QNH PRESSURE IN HPA 1003.9 1008.2 1006.0 1007.9 1009.7 1008.0 1005.3 1007.6 1011.8 1015.1 1009.8 1011.0 1003.9 DAY 8 23 22 13 7 3 13 12 14 3 14 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.2 998.6 996.7 999.7 1003.5 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.6 1008.0 1003.5 1004.8 1010.3 ****** ****** ****** ****** DAY ** ** ** ** 9 23 27 25 23 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 999.5 994.3 989.8 991.9 997.7 ****** ****** ****** ****** DAY ** ** ** ** 23 13 13 12 14 ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 842.3 841.1 840.6 840.0 841.0 838.4 838.1 839.8 841.3 846.8 844.0 845.0 841.5 MAX. QFE PRESSURE IN HPA 850.5 846.6 847.0 845.4 844.9 845.0 843.0 843.0 846.3 851.5 849.3 850.6 851.5 DAY 6 9 31 16 9 23 27 30 23 17 21 26 MIN. QFE PRESSURE IN HPA 832.3 834.4 834.0 834.6 836.2 834.6 833.1 834.0 837.7 841.2 838.0 838.3 832.3 DAY 8 3 12 13 7 3 13 12 3 3 13 4 MEAN QNH PRESSURE IN HPA 1015.0 1013.7 1013.1 1012.4 1013.5 1010.5 1010.1 1012.2 1014.0 1020.3 1017.0 1018.2 1014.2 MAX. QNH PRESSURE IN HPA 1024.6 1020.1 1020.6 1018.7 1018.1 1018.2 1015.9 1015.9 1019.7 1025.8 1023.2 1024.7 1025.8 DAY 6 9 31 16 9 23 27 30 23 17 21 26 MIN. QNH PRESSURE IN HPA 1003.4 1005.9 1005.4 1006.1 1008.0 1006.1 1004.4 1005.4 1009.7 1013.8 1010.1 1010.4 1003.4 DAY 8 3 12 13 7 3 13 12 3 3 13 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1003.1 997.0 995.6 998.2 1001.7 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1011.2 1007.3 1002.2 1003.7 1009.0 ****** ****** ****** ****** DAY ** ** ** ** 9 23 27 25 23 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 998.2 992.5 989.1 990.6 995.5 ****** ****** ****** ****** DAY ** ** ** ** 31 16 13 12 3 ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 843.1 841.9 841.0 840.2 840.8 837.9 837.8 839.5 841.3 847.2 844.7 846.0 841.8 MAX. QFE PRESSURE IN HPA 851.0 847.4 846.9 845.9 844.9 844.6 842.5 843.2 846.5 851.7 849.4 851.5 851.7 DAY 6 9 30 16 9 22 27 30 23 16 21 26 MIN. QFE PRESSURE IN HPA 832.8 835.1 834.5 835.2 836.7 834.1 833.1 833.5 837.5 841.8 838.2 838.9 832.8 DAY 8 4 21 13 7 3 12 12 3 3 10 4 MEAN QNH PRESSURE IN HPA 1016.1 1014.7 1013.6 1012.7 1013.3 1010.0 1009.8 1011.8 1013.9 1020.8 1017.9 1019.3 1014.5 MAX. QNH PRESSURE IN HPA 1025.2 1021.0 1020.4 1019.3 1018.1 1017.8 1015.3 1016.1 1020.0 1026.0 1023.3 1025.8 1026.0 DAY 6 9 30 16 9 22 27 30 23 16 21 26 MIN. QNH PRESSURE IN HPA 1004.0 1006.7 1006.0 1006.8 1008.6 1005.5 1004.4 1004.8 1009.5 1014.5 1010.3 1011.1 1004.0 DAY 8 4 21 13 7 3 12 12 3 3 10 4 MEAN QFF PRESSURE IN HPA 1019.1 1014.7 1011.6 1005.6 1003.4 996.5 995.5 998.4 1002.5 1015.1 1015.9 1019.8 1008.2 MAX. QFF PRESSURE IN HPA 1028.8 1023.5 1020.9 1012.6 1011.6 1006.2 1002.3 1003.4 1009.8 1021.9 1026.1 1026.1 1028.8 DAY 6 9 23 3 9 23 27 25 23 8 30 26 MIN. QFF PRESSURE IN HPA 1004.9 1003.5 1002.6 998.8 998.5 991.8 988.9 989.7 996.5 1005.6 1003.5 1011.2 988.9 DAY 8 21 8 20 20 18 13 12 13 2 10 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 842.1 839.3 839.0 840.8 842.6 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 845.6 845.9 844.1 845.0 847.5 ****** ****** ****** ****** DAY ** ** ** ** 9 22 27 30 23 ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 839.1 835.0 834.0 834.8 838.8 ****** ****** ****** ****** DAY ** ** ** ** 31 3 13 12 3 ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1014.9 1011.6 1011.3 1013.4 1015.4 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.9 1019.3 1017.2 1018.2 1021.1 ****** ****** ****** ****** DAY ** ** ** ** 9 22 27 30 23 ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1011.4 1006.6 1005.4 1006.4 1011.0 ****** ****** ****** ****** DAY ** ** ** ** 31 3 13 12 3 ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.2 997.1 995.9 998.7 1002.6 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.0 1006.8 1002.3 1004.0 1009.4 ****** ****** ****** ****** DAY ** ** ** ** 9 22 27 25 23 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 999.0 992.1 989.2 990.4 996.5 ****** ****** ****** ****** DAY ** ** ** ** 20 18 13 22 3 ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 842.2 839.6 839.2 841.2 842.5 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 846.1 846.5 843.7 845.0 846.9 ****** ****** ****** ****** DAY ** ** ** ** 9 22 27 30 23 ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 839.0 835.8 834.2 835.7 838.5 ****** ****** ****** ****** DAY ** ** ** ** 31 3 12 12 13 ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1015.0 1011.9 1011.4 1013.8 1015.3 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1019.5 1020.0 1016.7 1018.2 1020.4 ****** ****** ****** ****** DAY ** ** ** ** 9 22 27 30 23 ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1011.2 1007.5 1005.7 1007.4 1010.7 ****** ****** ****** ****** DAY ** ** ** ** 31 3 12 12 13 ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.3 998.2 996.6 999.5 1003.2 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.7 1008.2 1002.4 1005.1 1009.8 ****** ****** ****** ****** DAY ** ** ** ** 9 22 27 25 23 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 998.8 993.2 989.7 990.3 996.4 ****** ****** ****** ****** DAY ** ** ** ** 20 18 13 22 13 ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.9 7.0 12.9 18.7 23.3 29.4 32.3 31.9 22.9 17.5 14.2 5.1 18.5 MINIMUN AIR TEMPERATURE (C) -0.8 -1.3 4.8 10.2 14.3 19.0 22.4 21.1 12.8 10.0 7.0 -3.0 9.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 4 24 13 0 0 0 0 41 DAYS WITH MINIMUM TEMP. <=-4 6 9 0 0 0 0 0 0 0 0 0 14 29 DAYS WITH FREEZING MIN.<= 0 22 21 1 0 0 0 0 0 0 0 1 20 65 TEMPERATURE RECORDS LOWEST(C) -6.7 -6.2 0.0 1.0 9.8 15.0 19.5 17.8 7.5 4.6 0.0 -13.0 -13.0 DAY 11 4 16 5 2 9 2 22 22 10 14 8 MAXIMUM AIR TEMPERATURE (C) 11.8 11.9 17.5 23.2 27.8 34.2 37.0 36.7 27.6 22.1 18.7 10.6 23.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 8 29 31 31 6 0 0 0 106 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS HIGHEST(C) 19.5 18.5 24.0 30.4 31.4 38.0 40.2 40.5 33.0 27.6 23.2 18.0 40.5 DAY 3 28 30 25 31 26 7 5 1 1 4 3 DIF. BETWEEN (MAX.-MIN.) (C) 12.6 13.2 12.7 13.0 13.5 15.2 14.6 15.6 14.8 12.1 11.7 13.6 13.5 MEAN DAILY TEMP. (MDT) (C) 5.5 5.3 11.1 16.7 21.0 26.6 29.7 28.9 20.2 16.0 12.9 3.8 16.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 5.0 27.8 167.3 269.8 244.4 21.7 0.3 0.0 0.0 736.4 HEATING DEG. DAYS(BASE 18 0C) 388.3 355.8 213.2 70.0 1.9 0.0 0.0 0.0 9.8 67.6 154.2 440.8 1701.5 DEWPOINT (MEAN C) -6.7 -9.3 -3.2 -0.8 -0.3 3.0 8.9 0.9 -1.9 2.1 -2.3 -9.4 -1.6 MIXING RATIO (G/KG) 2.91 2.47 3.84 4.46 4.68 5.92 8.88 5.26 4.11 5.66 4.25 2.45 4.58 VAPOUR PRESSURE (HPA) 3.93 3.32 5.16 6.00 6.28 7.88 11.75 7.02 5.54 7.62 5.72 3.31 6.13 SATURATION DEF. (HPA) 6.65 7.35 10.38 16.84 23.18 34.60 38.35 41.81 23.56 12.97 11.08 6.25 19.42 RELATIVE HUMIDITY (MEAN %) 41 35 37 30 24 20 25 15 21 40 37 36 30 RELATIVE HUMIDITY (MAX. %) 58 52 56 47 39 30 33 25 30 59 55 52 45 RELATIVE HUMIDITY (MIN. %) 28 23 25 21 15 15 20 11 15 28 24 25 21 RELATIVE HUMIDITY (MEAN% 03UTC) 54 48 54 46 38 30 33 24 30 58 51 48 43 RELATIVE HUMIDITY (MEAN% 09UTC) 33 27 31 24 19 17 23 13 18 32 29 29 25 RELATIVE HUMIDITY (MEAN% 15UTC) 43 36 35 26 20 16 22 13 19 41 37 38 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 6.0 11.2 26.7 18.4 5.0 0.0 0.0 0.0 0.0 11.8 8.0 0.0 87.1 DAYS WITH PRECIPITATION >=10 0 0 1 1 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 1 1 2 1 0 0 0 0 0 0 1 0 6 DAYS WITH PRECIPITATION >= 1 2 3 5 1 2 0 0 0 0 5 3 0 21 DAYS WITH PRECIPITATION 3 4 7 4 3 0 0 0 0 9 3 0 33 GREATEST DAILY PRECIPITATION 5.0 5.0 13.0 18.0 4.0 0.0 0.0 0.0 0.0 4.0 6.0 0.0 18.0 DAY 24 19 12 11 1 ** ** ** ** 22 17 ** DAY WITH THUNDER STORM 0 0 0 0 3 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 2 1 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 4 4 6 8 11 9 3 1 1 0 3 4 54 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 45 45 45 45 180 270 270 PREVAILING WIND SPEED(KNOTS) 7.0 7.1 9.6 8.6 9.5 9.1 9.8 9.3 8.6 6.1 12.5 8.1 8.2 PREVAILING WIND PERCENT 19.4 22.9 14.8 16.0 21.3 22.7 33.5 29.7 27.3 21.3 24.7 12.9 17.8 CALMS PERCENT OF WIND 40.6 31.4 36.8 26.7 25.8 20.7 16.8 14.8 30.7 31.6 24.0 43.2 28.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 235 243 233 275 256 326 35 36 15 334 205 210 288 VECTOR WIND MAGNITUDE(KNOTS) 1.7 2.3 2.0 1.5 1.8 2.1 4.5 4.0 2.8 1.5 4.6 2.8 0.7 WIND STEADINESES (MEAN %) 35.4 36.5 34.5 25.0 26.1 30.9 56.3 53.3 52.8 32.6 59.7 46.7 11.1 WIND SPEED (MEAN KNOTS) 4.8 6.3 5.8 6.0 6.9 6.8 8.0 7.5 5.3 4.6 7.7 6.0 6.3 FASTEST WIND DIRECTION 210 210 210 210 260 220 10 30 280 280 230 180 230 FASTEST WIND SPEED (KNOTS) 23 31 25 27 27 19 19 19 16 17 39 39 39 DAY 5 1 7 2 6 3 9 4 5 31 30 2 DAYS WITH SKY CLEAR (0-2)/8 12 17 17 11 15 27 27 30 25 7 12 23 223 DAYS WITH P.CLOUDY (3-6)/8 14 9 11 14 15 3 4 1 5 21 14 5 116 DAYS WITH CLOUDY (7-8)/8 5 2 3 5 1 0 0 0 0 3 4 3 26 DAYS WITH VISIBILITY =< 2 KM 0 2 0 0 0 0 0 0 0 1 0 0 3 DURATION OF SUNSHINE HOURS 201.4 228.9 256.4 229.9 295.2 352.3 358.8 360.0 312.4 229.9 187.0 245.4 3257.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 843.5 840.4 841.3 842.8 841.7 837.0 835.7 837.7 845.1 847.1 844.4 844.6 841.8 MAX. QFE PRESSURE IN HPA 852.6 847.7 847.6 851.7 846.6 843.0 840.2 842.4 853.3 853.1 851.7 851.0 853.3 DAY-HOUR 10- 6 20- 6 18- 6 5- 6 15- 3 9- 6 13- 6 16- 6 23- 6 10- 6 2- 6 22- 6 MIN. QFE PRESSURE IN HPA 831.8 832.0 832.6 834.4 834.1 831.2 830.8 832.5 837.8 840.9 834.3 831.6 830.8 DAY-HOUR 16-12 12-12 12- 3 2-12 1-12 28-15 7-15 2-15 2-15 2-12 26- 3 4-12 MEAN QNH PRESSURE IN HPA 1016.4 1012.9 1013.9 1015.6 1014.4 1008.9 1007.3 1009.7 1018.4 1020.6 1017.5 1017.8 1014.5 MAX. QNH PRESSURE IN HPA 1027.1 1021.4 1021.2 1026.0 1020.1 1015.9 1012.6 1015.2 1027.9 1027.6 1026.0 1025.2 1027.9 DAY-HOUR 10- 6 20- 6 18- 6 5- 6 15- 3 9- 6 13- 6 16- 6 23- 6 10- 6 2- 6 22- 6 MIN. QNH PRESSURE IN HPA 1002.9 1003.1 1003.8 1005.9 1005.5 1002.2 1001.7 1003.7 1009.8 1013.5 1005.8 1002.6 1001.7 DAY-HOUR 16-12 12-12 12- 3 2-12 1-12 28-15 7-15 2-15 2-15 2-12 26- 3 4-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 843.7 840.6 841.6 843.4 842.4 837.9 836.4 838.3 845.5 847.4 844.6 844.7 842.2 MAX. QFE PRESSURE IN HPA 851.8 846.6 846.4 849.8 846.6 842.3 839.8 842.0 852.1 852.4 850.4 850.2 852.4 DAY 10 20 18 5 15 9 3 16 23 10 2 22 MIN. QFE PRESSURE IN HPA 835.8 832.3 832.6 837.6 836.6 833.5 832.6 833.9 839.1 844.1 834.3 832.2 832.2 DAY 16 12 12 3 1 22 8 2 1 2 26 4 MEAN QNH PRESSURE IN HPA 1016.8 1013.2 1014.2 1016.3 1015.1 1009.9 1008.2 1010.4 1018.8 1021.0 1017.7 1017.9 1015.0 MAX. QNH PRESSURE IN HPA 1026.1 1020.1 1019.9 1023.8 1020.1 1015.1 1012.2 1014.7 1026.5 1026.8 1024.5 1024.3 1026.8 DAY 10 20 18 5 15 9 3 16 23 10 2 22 MIN. QNH PRESSURE IN HPA 1007.5 1003.4 1003.8 1009.6 1008.4 1004.8 1003.8 1005.3 1011.4 1017.2 1005.8 1003.3 1003.3 DAY 16 12 12 3 1 22 8 2 1 2 26 4 MEAN QFF PRESSURE IN HPA 1017.5 1013.6 1010.7 1009.1 1005.0 995.9 992.5 995.5 1009.5 1014.7 1013.4 1020.3 1008.1 MAX. QFF PRESSURE IN HPA 1029.7 1025.6 1018.4 1021.7 1009.5 1002.6 998.2 1000.5 1020.0 1023.4 1019.6 1031.4 1031.4 DAY 10 20 18 5 15 9 3 23 23 10 10 8 MIN. QFF PRESSURE IN HPA 1005.2 997.5 999.2 1001.1 1000.1 988.8 987.1 989.9 998.4 1007.6 1001.9 999.5 987.1 DAY 16 1 12 27 13 22 8 2 1 2 26 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 844.8 841.8 842.6 844.1 842.8 838.3 836.8 838.9 846.4 848.3 845.6 845.7 843.0 MAX. QFE PRESSURE IN HPA 852.6 847.7 847.6 851.7 846.4 843.0 840.2 842.4 853.3 853.1 851.7 851.0 853.3 DAY 10 20 18 5 15 9 13 16 23 10 2 22 MIN. QFE PRESSURE IN HPA 836.6 833.4 833.8 838.3 837.3 833.8 832.6 834.5 840.3 844.7 837.3 833.7 832.6 DAY 16 12 12 2 1 29 8 2 1 2 26 4 MEAN QNH PRESSURE IN HPA 1018.0 1014.5 1015.5 1017.2 1015.7 1010.5 1008.6 1011.1 1019.8 1022.1 1018.9 1019.1 1015.9 MAX. QNH PRESSURE IN HPA 1027.1 1021.4 1021.2 1026.0 1019.9 1015.9 1012.6 1015.2 1027.9 1027.6 1026.0 1025.2 1027.9 DAY 10 20 18 5 15 9 13 16 23 10 2 22 MIN. QNH PRESSURE IN HPA 1008.4 1004.7 1005.2 1010.4 1009.3 1005.2 1003.8 1006.0 1012.8 1017.9 1009.3 1005.1 1003.8 DAY 16 12 12 2 1 29 8 2 1 2 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 843.4 840.6 841.7 843.0 842.0 837.4 836.2 838.2 845.5 847.2 844.3 844.6 842.0 MAX. QFE PRESSURE IN HPA 851.0 846.9 846.8 851.7 846.0 842.5 839.4 842.0 852.3 852.2 850.8 849.4 852.3 DAY 10 20 18 5 15 8 13 15 23 10 2 22 MIN. QFE PRESSURE IN HPA 833.2 833.2 834.0 836.0 836.1 832.5 832.5 833.8 839.6 843.0 837.2 832.0 832.0 DAY 16 12 12 2 1 29 8 2 1 2 26 4 MEAN QNH PRESSURE IN HPA 1016.4 1013.1 1014.4 1015.9 1014.7 1009.4 1007.9 1010.3 1018.8 1020.8 1017.4 1017.8 1014.7 MAX. QNH PRESSURE IN HPA 1025.2 1020.4 1020.3 1026.0 1019.4 1015.3 1011.7 1014.7 1026.7 1026.6 1025.0 1023.3 1026.7 DAY 10 20 18 5 15 8 13 15 23 10 2 22 MIN. QNH PRESSURE IN HPA 1004.5 1004.5 1005.4 1007.7 1007.9 1003.7 1003.7 1005.2 1011.9 1015.9 1009.1 1003.1 1003.1 DAY 16 12 12 2 1 29 8 2 1 2 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 842.3 839.2 840.2 841.6 840.8 835.9 834.8 836.7 844.1 846.1 843.4 843.5 840.7 MAX. QFE PRESSURE IN HPA 850.0 845.8 845.2 850.4 844.0 841.0 838.4 840.1 851.0 850.8 849.5 848.8 851.0 DAY 9 20 18 5 18 8 13 15 23 10 2 7 MIN. QFE PRESSURE IN HPA 831.8 832.0 832.8 834.4 834.1 831.9 831.6 832.9 838.3 840.9 837.8 831.6 831.6 DAY 16 12 12 2 1 29 7 1 1 2 26 4 MEAN QNH PRESSURE IN HPA 1015.1 1011.5 1012.6 1014.3 1013.4 1007.6 1006.3 1008.6 1017.2 1019.4 1016.3 1016.5 1013.2 MAX. QNH PRESSURE IN HPA 1024.0 1019.2 1018.5 1024.5 1017.1 1013.6 1010.5 1012.5 1025.2 1025.0 1023.5 1022.6 1025.2 DAY 9 20 18 5 18 8 13 15 23 10 2 7 MIN. QNH PRESSURE IN HPA 1002.9 1003.1 1004.0 1005.9 1005.5 1003.0 1002.6 1004.1 1010.4 1013.5 1009.8 1002.6 1002.6 DAY 16 12 12 2 1 29 7 1 1 2 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 843.0 839.9 840.5 841.8 840.7 835.4 834.3 836.4 844.1 846.5 844.0 844.4 840.9 MAX. QFE PRESSURE IN HPA 851.0 845.7 845.6 850.4 843.8 840.5 838.4 839.6 851.0 850.9 849.7 849.6 851.0 DAY 9 20 18 5 18 9 13 22 23 9 2 7 MIN. QFE PRESSURE IN HPA 832.2 833.8 832.8 835.4 834.4 831.2 830.8 832.5 837.8 841.6 838.6 831.9 830.8 DAY 16 12 12 2 1 28 7 2 2 2 25 4 MEAN QNH PRESSURE IN HPA 1015.9 1012.3 1013.0 1014.5 1013.2 1007.0 1005.7 1008.2 1017.2 1020.0 1017.0 1017.6 1013.5 MAX. QNH PRESSURE IN HPA 1025.2 1019.0 1018.9 1024.5 1016.8 1013.0 1010.5 1011.9 1025.2 1025.1 1023.7 1023.6 1025.2 DAY 9 20 18 5 18 9 13 22 23 9 2 7 MIN. QNH PRESSURE IN HPA 1003.3 1005.2 1004.0 1007.1 1005.9 1002.2 1001.7 1003.7 1009.8 1014.3 1010.8 1003.0 1001.7 DAY 16 12 12 2 1 28 7 2 2 2 25 4 MEAN QFF PRESSURE IN HPA 1016.5 1012.6 1009.3 1007.3 1002.9 992.8 989.7 993.3 1007.8 1013.6 1012.7 1019.9 1006.5 MAX. QFF PRESSURE IN HPA 1027.2 1023.3 1016.5 1023.1 1007.6 1000.4 995.6 998.0 1018.4 1021.4 1019.6 1032.5 1032.5 DAY 9 19 3 5 7 8 13 23 23 10 19 7 MIN. QFF PRESSURE IN HPA 999.6 1002.8 1000.1 999.7 996.9 985.6 983.7 987.8 996.7 1004.7 1005.0 1000.1 983.7 DAY 16 1 12 2 1 22 7 2 2 2 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.6 7.9 11.9 17.1 21.9 27.8 33.2 31.6 26.3 18.6 13.7 3.7 18.4 MINIMUN AIR TEMPERATURE (C) -0.9 0.1 3.2 9.7 13.4 18.4 22.7 20.3 15.7 8.8 3.3 -3.3 9.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 2 26 10 0 0 0 0 38 DAYS WITH MINIMUM TEMP. <=-4 6 3 1 0 0 0 0 0 0 0 4 12 26 DAYS WITH FREEZING MIN.<= 0 22 17 7 0 0 0 0 0 0 0 6 29 81 TEMPERATURE RECORDS LOWEST(C) -7.0 -7.0 -4.4 3.5 9.0 11.8 19.0 16.4 9.5 3.6 -8.0 -10.4 -10.4 DAY 25 26 6 8 10 1 27 10 23 27 28 13 MAXIMUM AIR TEMPERATURE (C) 12.7 12.6 16.5 21.7 26.2 32.4 37.9 36.5 31.3 23.6 19.2 7.9 23.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 23 31 31 25 3 0 0 116 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 18.5 24.0 27.4 31.0 38.0 40.8 39.2 36.0 30.5 24.5 14.0 40.8 DAY 17 22 25 3 7 22 13 6 9 3 3 22 DIF. BETWEEN (MAX.-MIN.) (C) 13.6 12.5 13.3 12.0 12.8 14.0 15.2 16.2 15.6 14.8 15.9 11.2 13.9 MEAN DAILY TEMP. (MDT) (C) 5.9 6.4 9.9 15.7 19.8 25.4 30.3 28.4 23.5 16.2 11.3 2.3 16.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 14.5 134.9 287.5 229.9 84.5 4.7 0.0 0.0 756.1 HEATING DEG. DAYS(BASE 18 0C) 375.2 325.7 252.5 75.8 15.4 0.0 0.0 0.0 0.5 86.9 201.6 486.5 1820.2 DEWPOINT (MEAN C) -2.1 -2.0 -5.2 -1.4 0.1 4.0 2.7 0.5 -1.0 -2.0 -4.5 -4.8 -1.3 MIXING RATIO (G/KG) 4.12 4.09 3.39 4.60 4.89 6.30 5.79 5.01 4.38 4.04 3.47 3.29 4.45 VAPOUR PRESSURE (HPA) 5.55 5.49 4.56 6.16 6.57 8.41 7.70 6.70 5.89 5.46 4.69 4.45 5.97 SATURATION DEF. (HPA) 5.40 5.66 10.05 14.12 20.70 30.41 44.91 41.52 29.99 17.52 12.24 3.85 19.70 RELATIVE HUMIDITY (MEAN %) 52 52 35 35 29 24 16 15 19 28 30 58 33 RELATIVE HUMIDITY (MAX. %) 65 68 54 56 46 40 26 22 31 43 44 72 47 RELATIVE HUMIDITY (MIN. %) 42 41 24 23 19 16 11 11 13 19 22 46 24 RELATIVE HUMIDITY (MEAN% 03UTC) 61 65 53 53 45 40 26 21 30 42 44 68 46 RELATIVE HUMIDITY (MEAN% 09UTC) 46 46 28 30 22 20 14 13 15 22 24 51 28 RELATIVE HUMIDITY (MEAN% 15UTC) 55 50 31 31 25 18 12 13 16 25 29 63 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.0 0.6 16.6 43.1 32.1 0.6 0.0 0.0 1.1 0.0 0.0 32.4 126.5 DAYS WITH PRECIPITATION >=10 0 0 1 2 1 0 0 0 0 0 0 1 5 DAYS WITH PRECIPITATION >= 5 0 0 1 3 2 0 0 0 0 0 0 3 9 DAYS WITH PRECIPITATION >= 1 0 0 3 7 4 0 0 0 0 0 0 4 18 DAYS WITH PRECIPITATION 1 4 4 8 4 1 0 0 2 0 0 6 30 GREATEST DAILY PRECIPITATION 0.0 0.6 10.0 18.0 19.0 0.6 0.0 0.0 0.6 0.0 0.0 13.0 19.0 DAY ** 7 22 22 29 4 ** ** 16 ** ** 12 DAY WITH THUNDER STORM 0 0 0 2 2 0 0 0 0 0 0 0 4 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 3 3 DAYS WITH DUST 1 6 5 5 5 3 4 2 2 1 4 0 38 WIND DIRECTION (PREVAILING) 45 270 270 270 270 270 360 45 45 45 270 270 270 PREVAILING WIND SPEED(KNOTS) 6.6 8.3 8.0 9.3 8.4 9.6 9.6 9.2 7.9 7.1 7.6 6.5 8.2 PREVAILING WIND PERCENT 13.5 15.7 21.9 18.0 21.3 22.7 23.9 22.6 24.0 19.4 16.0 18.1 18.7 CALMS PERCENT OF WIND 44.5 32.1 32.9 24.7 16.8 8.7 6.5 17.4 11.3 25.8 39.3 60.6 26.7 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 211 204 252 211 278 338 354 22 45 311 216 292 307 VECTOR WIND MAGNITUDE(KNOTS) 0.8 2.0 1.5 2.2 1.9 1.8 4.4 3.2 1.3 0.9 1.4 0.5 0.7 WIND STEADINESES (MEAN %) 17.4 28.6 23.4 31.4 24.7 21.2 48.4 43.8 16.7 16.1 29.8 20.0 10.8 WIND SPEED (MEAN KNOTS) 4.6 7.0 6.4 7.0 7.7 8.5 9.1 7.3 7.8 5.6 4.7 2.5 6.5 FASTEST WIND DIRECTION 170 190 240 210 220 190 200 30 210 210 190 160 190 FASTEST WIND SPEED (KNOTS) 23 35 31 19 23 19 19 17 23 23 23 16 35 DAY 17 5 26 3 8 15 2 8 20 12 24 31 DAYS WITH SKY CLEAR (0-2)/8 23 13 17 4 11 24 29 30 26 28 23 14 242 DAYS WITH P.CLOUDY (3-6)/8 5 9 10 16 16 6 2 1 4 2 7 8 86 DAYS WITH CLOUDY (7-8)/8 3 6 4 10 4 0 0 0 0 1 0 9 37 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 0 0 DURATION OF SUNSHINE HOURS 110.3 ****** 248.3 204.6 249.6 319.5 359.1 360.9 ****** 305.8 269.1 177.7 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 844.8 842.2 842.0 841.2 843.1 838.8 835.2 839.2 841.7 845.4 844.9 845.5 842.0 MAX. QFE PRESSURE IN HPA 853.0 848.0 850.5 846.0 848.3 845.4 840.0 843.9 848.2 853.7 851.8 849.8 853.7 DAY-HOUR 7- 6 14- 6 3- 6 4- 6 26- 6 1- 6 4- 6 25- 6 13- 6 27- 6 16- 6 10- 6 MIN. QFE PRESSURE IN HPA 839.0 832.8 834.0 834.9 837.6 831.4 830.1 835.0 837.5 839.5 836.8 839.1 830.1 DAY-HOUR 11-12 23-12 26-12 24-15 10-15 22-15 16-15 22-15 19-12 12-12 25-15 4-12 MEAN QNH PRESSURE IN HPA 1018.0 1015.0 1014.7 1013.8 1016.0 1011.0 1006.8 1011.5 1014.4 1018.7 1018.1 1018.8 1014.7 MAX. QNH PRESSURE IN HPA 1027.5 1021.7 1024.6 1019.4 1022.1 1018.7 1012.4 1016.9 1021.9 1028.3 1026.1 1023.8 1028.3 DAY-HOUR 7- 6 14- 6 3- 6 4- 6 26- 6 1- 6 4- 6 25- 6 13- 6 27- 6 16- 6 10- 6 MIN. QNH PRESSURE IN HPA 1011.2 1004.0 1005.4 1006.5 1009.6 1002.4 1000.9 1006.6 1009.5 1011.8 1008.7 1011.4 1000.9 DAY-HOUR 11-12 23-12 26-12 24-15 10-15 22-15 16-15 22-15 19-12 12-12 25-15 4-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 844.9 842.5 842.1 841.6 843.6 839.6 835.7 839.6 842.3 845.7 845.3 845.8 842.4 MAX. QFE PRESSURE IN HPA 851.6 847.1 848.9 845.1 847.5 844.5 839.4 843.0 847.1 852.8 851.3 849.3 852.8 DAY 7 14 3 1 26 1 4 25 13 27 16 10 MIN. QFE PRESSURE IN HPA 840.5 836.5 835.7 837.2 839.9 835.3 832.0 836.2 838.8 840.5 838.3 841.3 832.0 DAY 17 5 27 24 11 22 17 23 19 13 26 4 MEAN QNH PRESSURE IN HPA 1018.1 1015.3 1014.9 1014.2 1016.6 1011.9 1007.5 1011.9 1015.1 1019.0 1018.5 1019.1 1015.2 MAX. QNH PRESSURE IN HPA 1025.9 1020.7 1022.8 1018.3 1021.1 1017.6 1011.7 1015.9 1020.7 1027.3 1025.5 1023.2 1027.3 DAY 7 14 3 1 26 1 4 25 13 27 16 10 MIN. QNH PRESSURE IN HPA 1013.0 1008.3 1007.4 1009.1 1012.3 1006.9 1003.1 1008.0 1011.0 1013.0 1010.4 1013.9 1003.1 DAY 17 5 27 24 11 22 17 23 19 13 26 4 MEAN QFF PRESSURE IN HPA 1018.4 1014.9 1012.3 1007.7 1007.1 998.7 991.4 997.2 1003.7 1012.5 1015.4 1021.6 1008.4 MAX. QFF PRESSURE IN HPA 1027.0 1022.7 1022.4 1013.8 1013.3 1010.7 996.2 1002.3 1012.8 1024.8 1024.9 1027.3 1027.3 DAY 7 26 3 1 29 1 4 25 22 27 28 20 MIN. QFF PRESSURE IN HPA 1007.8 1003.1 999.8 1003.2 1001.5 990.2 985.8 992.6 998.7 1003.5 1007.9 1012.9 985.8 DAY 17 5 26 19 7 22 11 23 20 13 26 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 846.1 843.4 843.2 842.6 844.1 840.1 836.2 840.3 843.1 846.7 846.2 846.6 843.2 MAX. QFE PRESSURE IN HPA 853.0 848.0 850.5 846.0 848.3 845.4 840.0 843.9 848.2 853.7 851.8 849.8 853.7 DAY 7 14 3 4 26 1 4 25 13 27 16 10 MIN. QFE PRESSURE IN HPA 841.3 835.6 837.7 838.2 840.7 835.3 832.9 837.2 839.9 841.4 840.1 841.3 832.9 DAY 17 5 26 24 11 22 11 23 19 13 26 4 MEAN QNH PRESSURE IN HPA 1019.5 1016.3 1016.1 1015.4 1017.2 1012.5 1008.0 1012.8 1016.0 1020.2 1019.6 1020.1 1016.1 MAX. QNH PRESSURE IN HPA 1027.5 1021.7 1024.6 1019.4 1022.1 1018.7 1012.4 1016.9 1021.9 1028.3 1026.1 1023.8 1028.3 DAY 7 14 3 4 26 1 4 25 13 27 16 10 MIN. QNH PRESSURE IN HPA 1013.9 1007.3 1009.7 1010.3 1013.2 1006.9 1004.1 1009.1 1012.3 1014.0 1012.5 1013.9 1004.1 DAY 17 5 26 24 11 22 11 23 19 13 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 845.0 842.6 842.3 841.6 843.4 839.2 835.6 839.8 842.2 845.6 845.0 845.7 842.3 MAX. QFE PRESSURE IN HPA 851.8 847.2 849.5 845.5 848.3 845.3 839.1 843.1 847.0 852.1 850.3 849.8 852.1 DAY 7 14 3 13 26 1 28 25 13 27 16 10 MIN. QFE PRESSURE IN HPA 840.3 836.9 834.5 836.7 839.8 834.3 832.4 836.8 839.1 841.2 839.2 839.9 832.4 DAY 11 9 26 24 11 22 11 8 19 12 26 4 MEAN QNH PRESSURE IN HPA 1018.3 1015.5 1015.1 1014.3 1016.3 1011.5 1007.3 1012.1 1014.9 1019.0 1018.2 1019.0 1015.1 MAX. QNH PRESSURE IN HPA 1026.1 1020.8 1023.5 1018.8 1022.1 1018.6 1011.4 1016.0 1020.6 1026.5 1024.4 1023.8 1026.5 DAY 7 14 3 13 26 1 28 25 13 27 16 10 MIN. QNH PRESSURE IN HPA 1012.8 1008.8 1006.0 1008.6 1012.2 1005.8 1003.6 1008.7 1011.4 1013.8 1011.5 1012.3 1003.6 DAY 11 9 26 24 11 22 11 8 19 12 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 843.7 841.1 841.0 840.1 842.2 837.8 834.4 838.4 840.5 844.4 843.9 844.4 841.0 MAX. QFE PRESSURE IN HPA 851.0 845.9 847.9 844.4 846.9 843.8 837.9 841.9 845.3 851.6 849.1 848.0 851.6 DAY 7 1 3 13 26 1 28 11 13 27 15 10 MIN. QFE PRESSURE IN HPA 839.0 832.8 834.0 835.0 838.2 831.9 830.9 835.2 837.5 839.5 837.0 839.1 830.9 DAY 11 23 26 24 10 22 16 22 19 12 25 4 MEAN QNH PRESSURE IN HPA 1016.8 1013.7 1013.6 1012.6 1015.0 1009.8 1005.9 1010.5 1013.0 1017.5 1016.9 1017.5 1013.6 MAX. QNH PRESSURE IN HPA 1025.2 1019.3 1021.6 1017.5 1020.4 1016.8 1010.0 1014.6 1018.6 1025.9 1023.0 1021.7 1025.9 DAY 7 1 3 13 26 1 28 11 13 27 15 10 MIN. QNH PRESSURE IN HPA 1011.2 1004.0 1005.4 1006.6 1010.3 1003.0 1001.8 1006.8 1009.5 1011.8 1008.9 1011.4 1001.8 DAY 11 23 26 24 10 22 16 22 19 12 25 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 844.5 841.6 841.2 840.2 842.1 837.3 834.0 838.0 840.6 844.7 844.4 845.0 841.1 MAX. QFE PRESSURE IN HPA 851.3 846.6 847.5 844.2 846.7 843.2 837.8 841.7 845.0 852.1 850.2 849.4 852.1 DAY 7 1 3 13 26 1 28 11 13 27 15 10 MIN. QFE PRESSURE IN HPA 839.4 832.8 834.4 834.9 837.6 831.4 830.1 835.0 837.8 839.6 836.8 840.5 830.1 DAY 11 23 26 24 10 22 16 22 19 12 25 4 MEAN QNH PRESSURE IN HPA 1017.6 1014.2 1013.8 1012.6 1014.9 1009.2 1005.4 1010.1 1013.1 1017.9 1017.5 1018.3 1013.7 MAX. QNH PRESSURE IN HPA 1025.5 1020.1 1021.1 1017.3 1020.2 1016.1 1009.8 1014.4 1018.2 1026.5 1024.3 1023.3 1026.5 DAY 7 1 3 13 26 1 28 11 13 27 15 10 MIN. QNH PRESSURE IN HPA 1011.7 1004.0 1005.9 1006.5 1009.6 1002.4 1000.9 1006.6 1009.8 1011.9 1008.7 1013.0 1000.9 DAY 11 23 26 24 10 22 16 22 19 12 25 4 MEAN QFF PRESSURE IN HPA 1017.8 1013.8 1011.0 1006.0 1005.5 995.9 989.3 995.3 1001.7 1011.3 1014.4 1020.6 1006.9 MAX. QFF PRESSURE IN HPA 1027.1 1020.1 1020.7 1011.6 1012.5 1007.0 994.6 1000.5 1009.4 1023.5 1024.6 1027.1 1027.1 DAY 7 12 3 7 29 1 31 11 22 27 28 13 MIN. QFF PRESSURE IN HPA 1006.4 999.4 999.4 1001.0 1000.1 986.1 983.7 991.4 996.6 1002.0 1004.3 1013.0 983.7 DAY 17 23 26 24 7 22 10 23 9 12 25 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.4 8.0 9.6 17.8 23.2 29.1 29.3 30.0 28.2 18.8 10.6 8.8 17.9 MINIMUN AIR TEMPERATURE (C) -5.6 1.7 3.3 9.6 14.5 19.0 20.0 19.4 17.0 8.8 2.1 0.5 9.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 4 12 4 0 0 0 0 20 DAYS WITH MINIMUM TEMP. <=-4 16 0 0 0 0 0 0 0 0 0 1 2 19 DAYS WITH FREEZING MIN.<= 0 28 9 2 0 0 0 0 0 0 0 5 16 60 TEMPERATURE RECORDS LOWEST(C) -19.2 -3.5 -1.8 1.4 10.2 15.0 16.5 14.6 14.0 2.8 -5.6 -5.0 -19.2 DAY 15 6 1 5 3 18 14 4 28 20 19 4 MAXIMUM AIR TEMPERATURE (C) 5.9 12.5 13.9 22.2 27.5 33.7 33.4 34.5 33.1 23.9 15.0 13.9 22.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 10 30 31 30 27 0 0 0 128 DAYS WITH MAXIMUM TEMP. <= 0 7 0 0 0 0 0 0 0 0 0 0 0 7 TEMPERATURE RECORDS HIGHEST(C) 13.5 22.5 22.2 27.6 35.6 37.8 36.5 37.5 37.0 29.2 22.5 22.0 37.8 DAY 7 9 30 21 31 9 3 23 9 14 3 27 DIF. BETWEEN (MAX.-MIN.) (C) 11.5 10.8 10.6 12.6 13.0 14.7 13.4 15.1 16.1 15.1 12.9 13.4 13.3 MEAN DAILY TEMP. (MDT) (C) 0.1 7.1 8.6 15.9 21.0 26.3 26.7 26.9 25.1 16.4 8.6 7.2 15.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 42.7 160.3 177.1 183.2 121.9 1.4 0.0 0.0 686.7 HEATING DEG. DAYS(BASE 18 0C) 554.1 315.0 291.0 75.4 6.1 0.0 0.0 0.0 0.0 60.4 283.1 334.8 1919.9 DEWPOINT (MEAN C) -6.2 -1.5 -0.6 0.3 6.4 6.8 7.3 7.6 3.7 1.4 -4.8 -5.4 1.3 MIXING RATIO (G/KG) 3.00 4.19 4.52 4.87 7.31 7.84 8.14 8.15 6.12 5.22 3.24 3.21 5.48 VAPOUR PRESSURE (HPA) 4.05 5.62 6.05 6.54 9.78 10.43 10.84 10.86 8.19 7.03 4.40 4.34 7.34 SATURATION DEF. (HPA) 3.39 5.67 6.49 14.86 20.04 31.14 31.02 33.04 31.76 15.77 9.16 7.55 17.49 RELATIVE HUMIDITY (MEAN %) 60 56 54 33 37 27 27 26 22 34 36 39 38 RELATIVE HUMIDITY (MAX. %) 74 72 74 51 56 37 38 36 32 49 50 53 52 RELATIVE HUMIDITY (MIN. %) 48 42 41 24 27 21 22 21 17 26 27 28 29 RELATIVE HUMIDITY (MEAN% 03UTC) 72 69 73 50 56 37 38 35 32 49 49 51 51 RELATIVE HUMIDITY (MEAN% 09UTC) 53 48 46 27 31 25 24 23 20 28 28 31 32 RELATIVE HUMIDITY (MEAN% 15UTC) 63 54 48 29 34 25 24 23 20 32 37 41 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 18.8 39.2 40.5 2.4 35.4 10.1 0.0 0.0 0.0 3.0 0.0 6.0 155.4 DAYS WITH PRECIPITATION >=10 1 2 1 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 1 3 3 0 4 1 0 0 0 0 0 0 12 DAYS WITH PRECIPITATION >= 1 4 7 7 0 7 1 0 0 0 1 0 2 29 DAYS WITH PRECIPITATION 7 12 10 5 9 3 0 0 0 1 0 2 49 GREATEST DAILY PRECIPITATION 11.0 14.0 17.0 0.7 9.0 9.0 0.0 0.0 0.0 3.0 0.0 4.0 17.0 DAY 12 5 4 15 7 29 ** ** ** 17 ** 23 DAY WITH THUNDER STORM 0 0 1 0 3 0 0 0 0 0 0 0 4 DAYS WITH SNOW OR SLEET 2 2 2 0 0 0 0 0 0 0 0 0 6 DAYS WITH DUST 1 0 4 5 2 0 0 0 2 1 0 0 15 WIND DIRECTION (PREVAILING) 270 270 45 180 270 45 360 45 270 270 45 270 270 PREVAILING WIND SPEED(KNOTS) 7.3 8.7 6.3 12.3 7.0 8.4 9.2 8.5 8.4 8.7 6.7 7.2 7.9 PREVAILING WIND PERCENT 23.9 23.4 11.6 14.1 20.8 20.0 25.8 21.3 22.0 19.4 22.0 16.1 18.2 CALMS PERCENT OF WIND 43.2 29.0 38.1 28.9 34.4 20.0 18.7 28.4 32.7 30.3 38.7 38.1 31.7 NO. OF WIND OBSERVATION 155 145 155 149 154 150 155 155 150 155 150 155 1828 VECTOR WIND DIRECTION (MEAN) 237 230 196 244 318 354 5 5 354 341 19 182 319 VECTOR WIND MAGNITUDE(KNOTS) 1.7 2.0 2.3 2.2 0.8 1.6 4.4 2.9 1.0 0.9 1.3 0.7 0.7 WIND STEADINESES (MEAN %) 37.8 29.0 37.1 30.1 16.7 21.6 61.1 50.9 17.5 15.0 30.2 14.6 11.9 WIND SPEED (MEAN KNOTS) 4.5 6.9 6.2 7.3 4.8 7.4 7.2 5.7 5.7 6.0 4.3 4.8 5.9 FASTEST WIND DIRECTION 200 210 180 260 240 240 210 30 210 210 200 190 210 FASTEST WIND SPEED (KNOTS) 17 29 29 27 19 23 19 19 19 21 19 23 29 DAY 5 2 2 10 1 6 8 26 22 27 8 29 DAYS WITH SKY CLEAR (0-2)/8 15 8 10 12 13 24 24 25 30 29 20 17 227 DAYS WITH P.CLOUDY (3-6)/8 6 13 12 13 17 6 7 6 0 2 4 12 98 DAYS WITH CLOUDY (7-8)/8 10 8 9 5 1 0 0 0 0 0 6 2 41 DAYS WITH VISIBILITY =< 2 KM 3 4 2 1 0 0 0 0 0 0 0 0 10 DURATION OF SUNSHINE HOURS 181.8 173.3 187.2 257.6 286.8 361.4 367.4 343.0 302.7 305.5 231.3 240.3 3238.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 844.4 841.3 839.7 842.4 842.4 839.3 840.3 840.5 840.9 845.3 847.7 846.4 842.5 MAX. QFE PRESSURE IN HPA 851.4 847.5 845.6 847.3 846.3 843.5 845.9 847.1 849.2 853.1 856.9 852.4 856.9 DAY-HOUR 26- 6 24- 6 29- 6 8- 6 17- 6 3- 6 4- 6 30- 6 25- 6 2- 6 18- 6 8- 6 MIN. QFE PRESSURE IN HPA 837.8 831.0 833.7 835.2 836.0 833.2 832.9 834.2 834.2 837.7 841.6 840.5 831.0 DAY-HOUR 6-15 5- 3 13-12 3-12 29-15 19-12 7-15 8-12 20-12 27-12 28-12 16-12 MEAN QNH PRESSURE IN HPA 1017.5 1013.9 1012.1 1015.2 1015.2 1011.6 1012.7 1013.0 1013.5 1018.5 1021.4 1019.8 1015.4 MAX. QNH PRESSURE IN HPA 1025.7 1021.1 1018.9 1020.9 1019.7 1016.5 1019.3 1020.7 1023.1 1027.6 1032.1 1026.8 1032.1 DAY-HOUR 26- 6 24- 6 29- 6 8- 6 17- 6 3- 6 4- 6 30- 6 25- 6 2- 6 18- 6 8- 6 MIN. QNH PRESSURE IN HPA 1009.8 1001.9 1005.1 1006.8 1007.7 1004.5 1004.1 1005.7 1005.7 1009.7 1014.3 1013.0 1001.9 DAY-HOUR 6-15 5- 3 13-12 3-12 29-15 19-12 7-15 8-12 20-12 27-12 28-12 16-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 844.3 841.0 840.0 842.8 843.1 840.0 840.9 841.0 841.5 845.7 847.9 846.5 842.9 MAX. QFE PRESSURE IN HPA 850.3 846.8 845.2 846.8 845.9 842.6 845.5 846.5 847.8 852.1 856.0 851.8 856.0 DAY 26 24 29 10 7 3 4 30 25 2 19 8 MIN. QFE PRESSURE IN HPA 839.1 831.0 833.8 838.5 839.5 837.0 835.7 837.2 836.6 840.2 842.5 841.5 831.0 DAY 19 5 13 13 30 19 7 8 20 6 29 25 MEAN QNH PRESSURE IN HPA 1017.4 1013.6 1012.4 1015.7 1016.0 1012.4 1013.4 1013.6 1014.1 1019.0 1021.7 1020.0 1015.8 MAX. QNH PRESSURE IN HPA 1024.4 1020.3 1018.5 1020.3 1019.3 1015.4 1018.8 1020.0 1021.5 1026.5 1031.0 1026.1 1031.0 DAY 26 24 29 10 7 3 4 30 25 2 19 8 MIN. QNH PRESSURE IN HPA 1011.4 1001.9 1005.2 1010.7 1011.8 1008.9 1007.4 1009.1 1008.4 1012.6 1015.3 1014.2 1001.9 DAY 19 5 13 13 30 19 7 8 20 6 29 25 MEAN QFF PRESSURE IN HPA 1021.4 1012.5 1010.4 1008.7 1005.8 998.5 999.4 999.5 1001.6 1012.5 1020.3 1019.7 1009.2 MAX. QFF PRESSURE IN HPA 1031.4 1022.2 1017.4 1019.3 1012.5 1002.6 1003.8 1008.3 1011.1 1022.1 1034.5 1028.8 1034.5 DAY 15 24 29 5 8 27 4 31 25 20 19 4 MIN. QFF PRESSURE IN HPA 1011.1 1000.0 1002.2 999.5 998.0 994.1 993.0 994.6 996.4 1004.6 1012.0 1011.3 993.0 DAY 6 11 13 13 30 6 7 24 19 6 3 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 845.4 842.4 840.8 843.6 843.5 840.5 841.4 841.7 842.2 846.6 848.9 847.6 843.7 MAX. QFE PRESSURE IN HPA 851.4 847.5 845.6 847.3 846.3 843.5 845.9 847.1 849.2 853.1 856.9 852.4 856.9 DAY 26 24 29 8 17 3 4 30 25 2 18 8 MIN. QFE PRESSURE IN HPA 839.7 831.3 834.1 839.3 840.3 837.0 836.1 836.8 837.0 841.1 843.7 842.3 831.3 DAY 19 5 13 3 29 6 7 8 20 6 29 25 MEAN QNH PRESSURE IN HPA 1018.7 1015.2 1013.4 1016.6 1016.5 1013.0 1014.0 1014.3 1015.0 1020.1 1022.8 1021.2 1016.7 MAX. QNH PRESSURE IN HPA 1025.7 1021.1 1018.9 1020.9 1019.7 1016.5 1019.3 1020.7 1023.1 1027.6 1032.1 1026.8 1032.1 DAY 26 24 29 8 17 3 4 30 25 2 18 8 MIN. QNH PRESSURE IN HPA 1012.1 1002.3 1005.5 1011.6 1012.8 1008.9 1007.9 1008.7 1008.9 1013.7 1016.7 1015.1 1002.3 DAY 19 5 13 3 29 6 7 8 20 6 29 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 844.7 841.7 840.1 842.7 842.8 839.8 840.8 841.0 841.4 845.4 847.9 846.5 842.9 MAX. QFE PRESSURE IN HPA 850.5 847.0 844.8 846.1 846.3 842.6 845.8 846.7 848.1 852.1 856.1 851.4 856.1 DAY 26 24 29 8 17 3 3 30 25 2 18 2 MIN. QFE PRESSURE IN HPA 838.9 831.0 834.6 836.0 838.3 836.0 834.5 835.7 835.8 839.1 842.4 841.7 831.0 DAY 12 5 13 3 29 19 7 8 20 27 28 25 MEAN QNH PRESSURE IN HPA 1017.9 1014.3 1012.5 1015.5 1015.7 1012.2 1013.3 1013.5 1014.1 1018.7 1021.5 1020.0 1015.8 MAX. QNH PRESSURE IN HPA 1024.6 1020.6 1018.0 1019.5 1019.7 1015.4 1019.2 1020.2 1021.8 1026.5 1031.1 1025.7 1031.1 DAY 26 24 29 8 17 3 3 30 25 2 18 2 MIN. QNH PRESSURE IN HPA 1011.1 1001.9 1006.1 1007.7 1010.4 1007.7 1006.0 1007.4 1007.5 1011.4 1015.2 1014.4 1001.9 DAY 12 5 13 3 29 19 7 8 20 27 28 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 843.6 840.4 838.7 841.3 841.5 838.3 839.4 839.6 839.8 844.1 846.8 845.3 841.6 MAX. QFE PRESSURE IN HPA 849.1 845.8 842.5 845.4 845.0 840.8 845.5 844.6 846.6 850.1 855.1 850.2 855.1 DAY 26 8 29 10 17 3 3 29 25 2 18 7 MIN. QFE PRESSURE IN HPA 838.1 831.0 833.7 835.2 836.9 833.2 833.7 834.2 834.2 837.7 841.6 840.5 831.0 DAY 12 5 13 3 29 19 7 8 20 27 28 16 MEAN QNH PRESSURE IN HPA 1016.5 1012.9 1010.9 1013.9 1014.1 1010.4 1011.7 1012.0 1012.2 1017.2 1020.3 1018.6 1014.2 MAX. QNH PRESSURE IN HPA 1023.0 1019.2 1015.3 1018.7 1018.2 1013.3 1018.8 1017.8 1020.1 1024.2 1030.0 1024.3 1030.0 DAY 26 8 29 10 17 3 3 29 25 2 18 7 MIN. QNH PRESSURE IN HPA 1010.2 1001.9 1005.1 1006.8 1008.8 1004.5 1005.1 1005.7 1005.7 1009.7 1014.3 1013.0 1001.9 DAY 12 5 13 3 29 19 7 8 20 27 28 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 844.0 840.9 839.0 841.6 841.3 837.8 839.1 839.3 839.7 844.5 847.3 846.0 841.7 MAX. QFE PRESSURE IN HPA 849.8 846.7 842.5 845.9 845.9 841.0 844.0 844.8 846.8 850.9 855.8 850.8 855.8 DAY 26 8 29 10 7 28 3 31 25 2 18 7 MIN. QFE PRESSURE IN HPA 837.8 832.2 834.2 835.9 836.0 833.3 832.9 834.2 834.5 838.6 842.2 841.5 832.2 DAY 6 5 13 18 29 19 7 8 21 27 28 25 MEAN QNH PRESSURE IN HPA 1017.1 1013.5 1011.2 1014.2 1013.9 1009.9 1011.3 1011.6 1012.1 1017.7 1020.9 1019.3 1014.4 MAX. QNH PRESSURE IN HPA 1023.8 1020.2 1015.3 1019.3 1019.3 1013.6 1017.1 1018.0 1020.3 1025.1 1030.8 1025.0 1030.8 DAY 26 8 29 10 7 28 3 31 25 2 18 7 MIN. QNH PRESSURE IN HPA 1009.8 1003.3 1005.7 1007.6 1007.7 1004.6 1004.1 1005.7 1006.0 1010.8 1015.0 1014.2 1003.3 DAY 6 5 13 18 29 19 7 8 21 27 28 25 MEAN QFF PRESSURE IN HPA 1021.0 1012.4 1009.0 1007.2 1003.5 995.7 997.2 997.3 999.4 1011.1 1019.4 1018.9 1007.7 MAX. QFF PRESSURE IN HPA 1032.1 1021.5 1014.9 1016.8 1013.3 1001.3 1002.1 1006.1 1009.2 1020.6 1033.1 1027.8 1033.1 DAY 14 13 15 4 7 28 3 31 25 19 18 3 MIN. QFF PRESSURE IN HPA 1006.9 1001.5 1001.4 998.4 993.4 990.7 988.7 991.5 994.1 1003.1 1011.6 1011.8 988.7 DAY 6 10 25 18 29 9 7 8 19 27 6 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION NAEIN (40801) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 51 N LONGITUDE 53 5 E DATA PROCESSING CENTER ELEVATION 1549.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.8 7.0 9.5 17.3 23.0 28.6 33.7 31.6 26.4 21.2 11.0 6.7 18.6 MINIMUN AIR TEMPERATURE (C) -0.7 -2.4 2.1 8.5 13.8 19.4 23.7 20.1 16.1 12.5 4.2 -0.2 9.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 6 29 13 1 1 0 0 50 DAYS WITH MINIMUM TEMP. <=-4 5 12 3 0 0 0 0 0 0 0 0 3 23 DAYS WITH FREEZING MIN.<= 0 19 21 7 2 0 0 0 0 0 0 2 19 70 TEMPERATURE RECORDS LOWEST(C) -5.6 -12.2 -6.0 -2.4 6.0 16.5 18.4 14.0 12.4 7.2 -1.2 -6.6 -12.2 DAY 19 8 9 12 6 2 1 30 10 28 30 28 MAXIMUM AIR TEMPERATURE (C) 11.2 12.1 13.8 21.9 27.5 32.8 38.6 36.5 31.4 25.7 15.0 11.2 23.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 9 28 31 31 21 4 0 0 124 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.4 21.6 19.2 28.5 33.5 36.6 41.2 41.0 36.2 31.8 21.4 17.6 41.2 DAY 7 22 31 28 28 16 14 15 1 3 4 8 DIF. BETWEEN (MAX.-MIN.) (C) 11.9 14.5 11.7 13.4 13.7 13.4 14.9 16.4 15.3 13.2 10.8 11.4 13.3 MEAN DAILY TEMP. (MDT) (C) 5.3 4.8 7.9 15.2 20.6 26.1 31.2 28.3 23.8 19.1 9.6 5.5 16.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.5 31.6 152.5 315.2 226.6 86.6 18.2 0.0 0.0 831.4 HEATING DEG. DAYS(BASE 18 0C) 394.3 368.6 312.2 94.3 9.0 0.0 0.0 0.0 0.0 21.5 251.4 387.2 1838.7 DEWPOINT (MEAN C) -4.7 -12.8 -6.1 -1.1 5.1 6.1 9.0 -2.1 -2.0 -0.8 -2.1 -3.7 -1.3 MIXING RATIO (G/KG) 3.34 1.85 3.15 4.51 6.77 7.22 8.84 4.19 4.10 4.44 4.02 3.55 4.66 VAPOUR PRESSURE (HPA) 4.50 2.50 4.22 6.04 9.06 9.63 11.71 5.61 5.52 5.99 5.43 4.78 6.25 SATURATION DEF. (HPA) 5.86 8.38 8.23 14.81 20.29 30.56 42.43 42.88 30.55 20.36 8.16 5.54 19.84 RELATIVE HUMIDITY (MEAN %) 48 26 38 32 33 26 23 13 17 26 44 52 32 RELATIVE HUMIDITY (MAX. %) 63 39 55 50 47 38 31 19 27 40 64 71 45 RELATIVE HUMIDITY (MIN. %) 36 17 26 22 25 19 18 9 12 18 31 37 23 RELATIVE HUMIDITY (MEAN% 03UTC) 61 38 53 47 46 38 31 19 27 40 64 67 44 RELATIVE HUMIDITY (MEAN% 09UTC) 39 21 31 27 28 22 20 10 14 20 33 42 26 RELATIVE HUMIDITY (MEAN% 15UTC) 49 22 35 28 30 23 20 10 15 25 42 55 30 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 5.6 0.0 13.8 9.1 10.7 3.8 0.0 0.0 0.0 6.5 5.9 24.2 79.6 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH PRECIPITATION >= 5 0 0 1 1 1 0 0 0 0 1 1 2 7 DAYS WITH PRECIPITATION >= 1 2 0 4 2 2 1 0 0 0 2 1 5 19 DAYS WITH PRECIPITATION 3 0 6 5 3 4 0 0 0 3 3 7 34 GREATEST DAILY PRECIPITATION 4.0 0.0 6.0 5.0 9.0 2.0 0.0 0.0 0.0 5.0 5.0 16.0 16.0 DAY 17 ** 13 24 21