STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.1 -0.4 0.7 6.8 17.5 22.3 23.3 22.9 20.0 11.1 7.6 0.4 10.7 MINIMUN AIR TEMPERATURE (C) -11.6 -6.8 -4.0 0.4 9.4 11.5 13.2 12.4 9.7 5.4 0.3 -5.4 2.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 27 16 12 8 0 0 0 0 0 0 3 18 84 DAYS WITH FREEZING MIN.<= 0 31 26 23 13 0 0 0 0 0 2 18 26 139 TEMPERATURE RECORDS LOWEST(C) -19.8 -20.0 -15.6 -9.0 5.4 8.2 10.6 6.8 3.6 -1.0 -6.2 -14.6 -20.0 DAY 9 12 22 1 7 10 3 30 29 28 30 22 MAXIMUM AIR TEMPERATURE (C) 1.5 4.9 5.3 11.4 21.8 27.3 28.5 28.7 25.7 15.5 13.0 5.5 15.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 15 10 2 0 0 0 27 DAYS WITH MAXIMUM TEMP. <= 0 11 2 0 0 0 0 0 0 0 0 0 3 16 TEMPERATURE RECORDS HIGHEST(C) 7.0 10.0 10.0 18.6 25.0 29.5 31.6 31.0 30.4 25.0 17.2 10.4 31.6 DAY 22 3 3 29 17 29 24 20 7 2 19 3 DIF. BETWEEN (MAX.-MIN.) (C) 13.1 11.7 9.3 11.0 12.4 15.8 15.3 16.3 16.0 10.1 12.7 10.9 12.9 MEAN DAILY TEMP. (MDT) (C) -5.0 -0.9 0.6 5.9 15.6 19.4 20.9 20.6 17.7 10.5 6.7 0.1 9.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 2.0 23.4 9.9 0.2 0.0 0.0 0.0 35.6 HEATING DEG. DAYS(BASE 18 0C) 714.1 505.4 539.2 363.5 74.2 3.7 4.5 2.9 34.3 233.8 340.3 555.6 3371.7 DEWPOINT (MEAN C) ***** -5.5 -4.1 -1.3 1.8 0.1 3.1 1.0 -1.6 0.4 -5.2 -6.7 ***** MIXING RATIO (G/KG) ****** 3.49 3.90 4.76 5.77 5.18 6.45 5.73 4.54 5.27 3.62 3.23 ****** VAPOUR PRESSURE (HPA) ****** 4.30 4.77 5.86 7.11 6.36 7.90 7.03 5.60 6.49 4.47 3.98 ****** SATURATION DEF. (HPA) ****** 2.04 1.95 4.61 13.48 21.51 22.05 22.11 19.09 7.35 6.52 2.62 ****** RELATIVE HUMIDITY (MEAN %) *** 71 73 61 38 26 30 28 25 53 46 63 *** RELATIVE HUMIDITY (MAX. %) *** 87 86 78 66 48 49 46 40 71 69 80 *** RELATIVE HUMIDITY (MIN. %) *** 56 58 44 24 14 20 16 17 39 29 47 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** 79 79 74 65 48 49 46 40 64 67 66 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** 68 70 55 28 16 24 18 19 48 35 62 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** 67 70 56 34 20 25 24 21 52 42 63 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 44.4 137.0 395.1 147.9 20.4 0.0 9.2 11.8 0.0 234.0 112.3 361.6 1473.7 DAYS WITH PRECIPITATION >=10 3 5 11 5 1 0 0 0 0 9 1 9 44 DAYS WITH PRECIPITATION >= 5 3 7 15 6 2 0 0 0 0 10 2 9 54 DAYS WITH PRECIPITATION >= 1 6 9 18 8 4 0 3 5 0 14 3 12 82 DAYS WITH PRECIPITATION 6 9 19 9 4 0 4 6 0 14 4 14 89 GREATEST DAILY PRECIPITATION 14.0 59.0 77.0 38.0 11.0 0.0 4.0 3.0 0.0 38.0 103.0 88.0 103.0 DAY 26 10 3 26 6 ** 28 8 ** 26 3 24 DAY WITH THUNDER STORM 2 1 4 2 0 1 3 4 0 2 0 7 26 DAYS WITH SNOW OR SLEET 5 7 17 0 0 0 0 0 0 1 0 8 38 DAYS WITH DUST 1 0 1 0 0 0 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 315 225 270 225 270 180 315 180 270 270 270 225 270 PREVAILING WIND SPEED(KNOTS) 8.7 7.3 7.5 6.3 5.6 4.9 7.0 6.1 7.1 7.0 8.7 10.8 7.4 PREVAILING WIND PERCENT 7.7 10.0 16.8 12.7 7.1 4.7 6.5 9.0 7.3 11.6 9.3 11.0 8.1 CALMS PERCENT OF WIND 85.2 69.3 63.2 64.7 78.7 78.7 80.0 76.8 74.7 71.6 63.3 59.4 72.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 286 263 240 226 254 267 279 218 235 264 256 246 248 VECTOR WIND MAGNITUDE(KNOTS) 0.5 1.6 2.4 1.6 0.8 0.4 0.6 0.8 1.2 1.2 1.5 2.3 1.2 WIND STEADINESES (MEAN %) 35.7 69.6 85.7 64.0 66.7 36.4 46.2 57.1 63.2 50.0 53.6 57.5 57.1 WIND SPEED (MEAN KNOTS) 1.4 2.3 2.8 2.5 1.2 1.1 1.3 1.4 1.9 2.4 2.8 4.0 2.1 FASTEST WIND DIRECTION 200 310 270 330 200 290 320 150 280 270 330 300 200 FASTEST WIND SPEED (KNOTS) 23 16 23 21 39 17 14 16 16 16 23 29 39 DAY 7 17 17 20 6 21 29 8 13 7 15 24 DAYS WITH SKY CLEAR (0-2)/8 22 16 11 18 18 27 26 23 30 15 17 17 240 DAYS WITH P.CLOUDY (3-6)/8 4 6 8 8 11 3 5 7 0 7 10 7 76 DAYS WITH CLOUDY (7-8)/8 5 6 12 4 2 0 0 1 0 9 3 7 49 DAYS WITH VISIBILITY =< 2 KM 9 4 4 1 0 0 0 0 0 0 0 7 25 DURATION OF SUNSHINE HOURS 180.1 155.3 148.0 238.7 292.5 345.0 331.6 299.3 302.5 183.2 197.4 145.5 2819.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** 770.5 766.2 771.5 773.0 770.8 770.2 770.3 772.5 773.4 773.6 770.8 ****** MAX. QFE PRESSURE IN HPA ****** 778.5 772.2 776.8 776.5 776.0 773.7 775.4 778.5 778.1 778.0 778.8 ****** DAY-HOUR **-** 1- 3 2- 6 22- 6 12-12 28- 6 29-15 7- 6 26- 6 7- 6 16- 6 1- 6 MIN. QFE PRESSURE IN HPA ****** 760.7 759.5 763.1 769.3 766.2 765.4 766.8 769.2 768.5 769.3 761.2 ****** DAY-HOUR **-** 10-12 14- 3 5- 3 7-12 13-12 3-12 29-12 1-12 21-12 25-12 31- 3 MEAN QNH PRESSURE IN HPA ****** 1017.1 1011.6 1018.4 1020.2 1017.5 1016.7 1016.8 1019.6 1020.7 1021.0 1017.5 ****** MAX. QNH PRESSURE IN HPA ****** 1027.1 1019.2 1025.0 1024.6 1024.0 1021.1 1023.2 1027.1 1026.6 1026.5 1027.5 ****** DAY-HOUR **-** 1- 3 2- 6 22- 6 12-12 28- 6 29-15 7- 6 26- 6 7- 6 16- 6 1- 6 MIN. QNH PRESSURE IN HPA ****** 1004.8 1003.3 1007.8 1015.6 1011.7 1010.7 1012.5 1015.5 1014.6 1015.6 1005.4 ****** DAY-HOUR **-** 10-12 14- 3 5- 3 7-12 13-12 3-12 29-12 1-12 21-12 25-12 31- 3 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 ****** 770.8 765.8 771.5 773.0 771.2 770.6 770.7 772.8 773.3 773.8 770.7 ****** MAX. QFE PRESSURE IN HPA ****** 778.5 771.6 776.2 775.5 775.9 772.6 775.2 777.9 777.3 777.0 777.9 ****** DAY ** 1 24 30 13 28 18 7 26 17 16 1 MIN. QFE PRESSURE IN HPA ****** 763.6 759.5 763.1 770.0 766.6 766.4 767.7 770.0 769.0 770.2 761.2 ****** DAY ** 10 14 5 6 13 3 29 28 9 26 31 MEAN QNH PRESSURE IN HPA ****** 1017.5 1011.2 1018.4 1020.2 1018.0 1017.2 1017.3 1019.9 1020.6 1021.2 1017.4 ****** MAX. QNH PRESSURE IN HPA ****** 1027.1 1018.5 1024.2 1023.4 1023.9 1019.7 1023.0 1026.4 1025.6 1025.2 1026.4 ****** DAY ** 1 24 30 13 28 18 7 26 17 16 1 MIN. QNH PRESSURE IN HPA ****** 1008.4 1003.3 1007.8 1016.5 1012.2 1012.0 1013.6 1016.5 1015.2 1016.7 1005.4 ****** DAY ** 10 14 5 6 13 3 29 28 9 26 31 MEAN QFF PRESSURE IN HPA ****** 1018.8 1010.8 1013.1 1005.6 999.8 997.9 999.0 1004.7 1011.1 1016.3 1018.2 ****** MAX. QFF PRESSURE IN HPA ****** 1034.3 1025.3 1020.6 1012.4 1004.5 1005.8 1004.1 1012.6 1017.8 1027.0 1032.1 ****** DAY ** 12 24 22 13 28 30 9 30 28 30 1 MIN. QFF PRESSURE IN HPA ****** 1006.8 1002.5 1003.7 1000.9 994.4 993.3 994.7 999.7 1003.1 1006.8 1002.2 ****** DAY ** 10 14 4 22 13 26 26 28 9 7 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** 771.2 766.6 772.0 773.4 771.5 770.8 771.1 773.5 774.4 774.6 771.8 ****** MAX. QFE PRESSURE IN HPA ****** 778.4 772.2 776.8 776.1 776.0 773.3 775.4 778.5 778.1 778.0 778.8 ****** DAY ** 1 2 22 11 28 18 7 26 7 16 1 MIN. QFE PRESSURE IN HPA ****** 762.8 759.8 763.6 769.9 766.9 766.4 767.7 770.8 769.4 771.1 762.4 ****** DAY ** 10 14 5 6 13 3 29 28 9 7 31 MEAN QNH PRESSURE IN HPA ****** 1017.9 1012.2 1019.0 1020.8 1018.4 1017.5 1017.9 1020.8 1022.0 1022.2 1018.8 ****** MAX. QNH PRESSURE IN HPA ****** 1027.0 1019.2 1025.0 1024.1 1024.0 1020.6 1023.2 1027.1 1026.6 1026.5 1027.5 ****** DAY ** 1 2 22 11 28 18 7 26 7 16 1 MIN. QNH PRESSURE IN HPA ****** 1007.4 1003.7 1008.4 1016.3 1012.6 1012.0 1013.6 1017.5 1015.7 1017.8 1006.9 ****** DAY ** 10 14 5 6 13 3 29 28 9 7 31 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 ****** 770.5 766.3 771.8 773.2 770.8 770.2 770.2 772.4 773.5 773.5 771.0 ****** MAX. QFE PRESSURE IN HPA ****** 777.8 771.3 776.1 776.1 775.3 772.4 774.5 777.3 777.4 777.1 777.2 ****** DAY ** 1 2 22 11 28 18 8 26 7 30 1 MIN. QFE PRESSURE IN HPA ****** 761.6 759.6 764.0 769.9 766.3 765.8 767.2 770.1 769.3 770.1 763.0 ****** DAY ** 10 14 5 6 13 3 29 1 21 26 31 MEAN QNH PRESSURE IN HPA ****** 1017.2 1011.8 1018.7 1020.4 1017.5 1016.7 1016.7 1019.5 1020.8 1020.9 1017.7 ****** MAX. QNH PRESSURE IN HPA ****** 1026.2 1018.1 1024.1 1024.1 1023.1 1019.5 1022.1 1025.6 1025.7 1025.4 1025.5 ****** DAY ** 1 2 22 11 28 18 8 26 7 30 1 MIN. QNH PRESSURE IN HPA ****** 1005.9 1003.4 1008.9 1016.3 1011.8 1011.2 1013.0 1016.6 1015.6 1016.6 1007.7 ****** DAY ** 10 14 5 6 13 3 29 1 21 26 31 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 ****** 769.9 766.0 771.1 772.6 770.3 769.6 769.6 771.7 772.8 772.9 770.1 ****** MAX. QFE PRESSURE IN HPA ****** 776.8 771.2 775.3 776.5 774.0 772.3 774.5 776.3 776.3 776.2 776.0 ****** DAY ** 1 24 22 12 28 29 8 26 6 15 1 MIN. QFE PRESSURE IN HPA ****** 760.7 760.0 763.7 769.3 766.2 765.4 766.8 769.2 768.5 769.3 762.4 ****** DAY ** 10 14 4 7 13 3 29 1 21 25 31 MEAN QNH PRESSURE IN HPA ****** 1016.3 1011.5 1017.9 1019.7 1016.8 1015.9 1016.0 1018.6 1019.9 1020.0 1016.6 ****** MAX. QNH PRESSURE IN HPA ****** 1025.0 1018.0 1023.1 1024.6 1021.5 1019.3 1022.1 1024.4 1024.4 1024.2 1024.0 ****** DAY ** 1 24 22 12 28 29 8 26 6 15 1 MIN. QNH PRESSURE IN HPA ****** 1004.8 1003.9 1008.6 1015.6 1011.7 1010.7 1012.5 1015.5 1014.6 1015.6 1006.9 ****** DAY ** 10 14 4 7 13 3 29 1 21 25 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** 770.3 766.1 771.2 772.8 770.4 770.0 769.8 772.0 773.0 773.3 770.5 ****** MAX. QFE PRESSURE IN HPA ****** 777.5 771.0 775.3 776.1 774.2 773.7 775.0 776.3 776.5 776.9 776.6 ****** DAY ** 1 24 22 12 28 29 8 26 24 15 1 MIN. QFE PRESSURE IN HPA ****** 761.3 760.5 763.7 769.3 766.5 766.0 767.0 769.6 769.0 769.6 762.9 ****** DAY ** 10 14 4 7 12 3 29 1 21 25 30 MEAN QNH PRESSURE IN HPA ****** 1016.8 1011.6 1018.0 1019.9 1017.0 1016.4 1016.2 1019.0 1020.2 1020.7 1017.1 ****** MAX. QNH PRESSURE IN HPA ****** 1025.9 1017.7 1023.1 1024.1 1021.7 1021.1 1022.7 1024.4 1024.6 1025.1 1024.7 ****** DAY ** 1 24 22 12 28 29 8 26 24 15 1 MIN. QNH PRESSURE IN HPA ****** 1005.6 1004.6 1008.6 1015.6 1012.1 1011.5 1012.7 1016.0 1015.2 1016.0 1007.6 ****** DAY ** 10 14 4 7 12 3 29 1 21 25 30 MEAN QFF PRESSURE IN HPA ****** 1018.3 1011.3 1012.4 1005.3 998.9 997.3 997.8 1003.7 1010.8 1015.9 1017.9 ****** MAX. QFF PRESSURE IN HPA ****** 1034.8 1028.1 1019.4 1011.3 1002.5 1007.6 1004.8 1010.7 1017.3 1028.4 1029.4 ****** DAY ** 12 22 22 12 27 29 8 30 13 30 1 MIN. QFF PRESSURE IN HPA ****** 1004.6 1004.1 1000.6 999.7 995.2 991.8 994.0 997.8 1003.4 1006.6 1007.9 ****** DAY ** 10 27 19 22 13 26 25 10 4 7 13 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 KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.6 -3.5 2.2 8.4 16.6 21.0 24.8 23.5 20.2 14.9 5.9 1.4 11.0 MINIMUN AIR TEMPERATURE (C) -10.0 -9.5 -2.9 2.8 7.9 11.1 14.7 13.8 9.4 6.1 -0.2 -3.6 3.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 27 23 12 3 0 0 0 0 0 0 10 13 88 DAYS WITH FREEZING MIN.<= 0 30 27 19 5 0 0 0 0 0 0 12 25 118 TEMPERATURE RECORDS LOWEST(C) -21.6 -20.6 -12.5 -5.0 1.6 6.2 9.0 10.4 6.2 2.6 -6.8 -20.6 -21.6 DAY 20 7 16 2 8 26 1 5 1 11 25 29 MAXIMUM AIR TEMPERATURE (C) 1.2 2.1 6.1 12.0 20.7 25.8 30.2 28.8 26.5 20.6 10.6 6.0 15.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 20 13 3 0 0 0 36 DAYS WITH MAXIMUM TEMP. <= 0 12 8 0 0 0 0 0 0 0 0 0 2 22 TEMPERATURE RECORDS HIGHEST(C) 8.6 7.0 10.2 18.0 26.2 29.4 34.0 31.6 30.6 24.2 17.6 13.0 34.0 DAY 5 29 20 18 27 13 14 10 10 7 7 11 DIF. BETWEEN (MAX.-MIN.) (C) 11.2 11.6 9.0 9.2 12.8 14.7 15.5 15.0 17.1 14.5 10.8 9.6 12.6 MEAN DAILY TEMP. (MDT) (C) -4.4 -3.7 1.6 7.4 14.3 18.5 22.5 21.3 17.9 13.3 5.2 1.2 9.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.2 56.9 21.8 0.5 0.0 0.0 0.0 80.5 HEATING DEG. DAYS(BASE 18 0C) 694.1 630.6 508.6 317.2 114.9 11.4 1.0 0.0 22.4 145.5 372.6 521.1 3339.4 DEWPOINT (MEAN C) -8.0 -7.6 -4.6 -2.1 -1.9 -2.6 2.8 0.7 -4.5 -5.0 -5.5 -7.2 -3.8 MIXING RATIO (G/KG) 2.94 3.02 3.72 4.52 4.48 4.28 6.28 5.35 3.73 3.57 3.39 3.07 4.03 VAPOUR PRESSURE (HPA) 3.60 3.71 4.56 5.55 5.51 5.25 7.67 6.56 4.60 4.42 4.19 3.77 4.95 SATURATION DEF. (HPA) 1.35 1.41 2.85 5.91 14.15 20.51 25.12 23.59 20.52 13.29 5.68 3.48 11.49 RELATIVE HUMIDITY (MEAN %) 74 76 64 51 31 23 27 24 22 28 48 57 44 RELATIVE HUMIDITY (MAX. %) 87 89 78 69 51 41 50 42 41 48 64 74 61 RELATIVE HUMIDITY (MIN. %) 61 61 50 39 21 14 16 15 11 16 34 42 32 RELATIVE HUMIDITY (MEAN% 03UTC) 78 82 71 64 49 41 50 42 39 48 60 66 58 RELATIVE HUMIDITY (MEAN% 09UTC) 72 73 63 45 24 16 19 17 13 19 39 51 38 RELATIVE HUMIDITY (MEAN% 15UTC) 70 76 58 50 28 19 20 19 15 23 44 54 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 263.1 388.1 554.2 126.2 20.3 0.2 0.4 0.0 0.0 0.5 303.0 294.4 1950.4 DAYS WITH PRECIPITATION >=10 6 10 8 7 1 0 0 0 0 0 6 8 46 DAYS WITH PRECIPITATION >= 5 7 10 8 9 2 0 0 0 0 0 6 9 51 DAYS WITH PRECIPITATION >= 1 15 11 10 12 3 0 0 0 0 0 7 12 70 DAYS WITH PRECIPITATION 18 13 14 13 4 1 1 0 0 2 7 15 88 GREATEST DAILY PRECIPITATION 56.0 104.0 145.0 26.0 14.0 0.2 0.4 0.0 0.0 0.3 115.0 76.0 145.0 DAY 29 2 5 26 2 2 28 ** ** 16 13 26 DAY WITH THUNDER STORM 1 5 7 6 2 0 1 0 0 0 4 5 31 DAYS WITH SNOW OR SLEET 15 12 10 2 0 0 0 0 0 0 6 13 58 DAYS WITH DUST 0 0 0 3 2 1 1 0 1 0 0 0 8 WIND DIRECTION (PREVAILING) 270 225 270 270 270 225 225 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 11.6 8.3 8.9 8.9 7.7 7.0 6.5 7.6 7.4 8.7 9.1 10.1 8.5 PREVAILING WIND PERCENT 11.0 9.0 20.6 29.3 18.7 15.3 16.8 14.8 16.1 14.8 19.5 20.0 16.2 CALMS PERCENT OF WIND 75.5 69.7 44.5 35.3 41.3 55.3 58.1 51.6 61.1 54.8 51.0 49.0 53.9 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 149 155 149 155 1828 VECTOR WIND DIRECTION (MEAN) 258 246 246 268 277 257 235 234 257 270 256 249 256 VECTOR WIND MAGNITUDE(KNOTS) 1.9 1.5 3.5 4.3 2.6 2.2 1.6 1.8 2.1 2.4 3.3 3.8 2.5 WIND STEADINESES (MEAN %) 76.0 62.5 70.0 72.9 56.5 71.0 57.1 51.4 75.0 61.5 73.3 73.1 65.8 WIND SPEED (MEAN KNOTS) 2.5 2.4 5.0 5.9 4.6 3.1 2.8 3.5 2.8 3.9 4.5 5.2 3.8 FASTEST WIND DIRECTION 240 160 180 300 300 170 330 270 310 330 210 270 300 FASTEST WIND SPEED (KNOTS) 23 25 29 35 21 19 23 21 16 21 29 17 35 DAY 16 2 9 30 1 2 25 30 2 22 28 27 DAYS WITH SKY CLEAR (0-2)/8 11 14 14 10 24 27 29 28 29 24 14 15 239 DAYS WITH P.CLOUDY (3-6)/8 11 8 9 7 4 3 2 3 1 7 9 5 69 DAYS WITH CLOUDY (7-8)/8 9 7 8 13 3 0 0 0 0 0 7 11 58 DAYS WITH VISIBILITY =< 2 KM 14 15 4 1 0 0 0 0 0 0 3 4 41 DURATION OF SUNSHINE HOURS 119.4 139.2 191.2 187.4 304.4 292.6 351.5 336.0 302.9 263.7 168.8 142.2 2799.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 768.1 767.2 767.0 770.0 771.5 769.3 767.3 768.7 771.8 774.0 772.9 769.7 769.8 MAX. QFE PRESSURE IN HPA 775.9 773.4 772.9 775.5 774.4 774.7 774.6 773.2 777.0 779.3 779.1 776.4 779.3 DAY-HOUR 3- 6 7- 6 17- 6 12- 9 4-12 12- 6 31- 6 1- 3 15- 6 28- 6 6- 6 5- 6 MIN. QFE PRESSURE IN HPA 762.0 760.0 760.4 765.0 767.3 763.7 763.4 765.2 768.4 769.7 766.9 755.2 755.2 DAY-HOUR 19- 3 2- 3 5- 3 25-15 1- 3 30-15 18-12 23- 9 3-12 7-12 30-12 27- 3 MEAN QNH PRESSURE IN HPA 1014.1 1013.0 1012.7 1016.4 1018.3 1015.6 1013.0 1014.8 1018.7 1021.4 1020.1 1016.1 1016.2 MAX. QNH PRESSURE IN HPA 1023.9 1020.7 1020.1 1023.4 1022.0 1022.4 1022.2 1020.5 1025.2 1028.1 1027.9 1024.5 1028.1 DAY-HOUR 3- 6 7- 6 17- 6 12- 9 4-12 12- 6 31- 6 1- 3 15- 6 28- 6 6- 6 5- 6 MIN. QNH PRESSURE IN HPA 1006.4 1003.9 1004.4 1010.2 1013.1 1008.6 1008.2 1010.5 1014.5 1016.1 1012.6 997.9 997.9 DAY-HOUR 19- 3 2- 3 5- 3 25-15 1- 3 30-15 18-12 23- 9 3-12 7-12 30-12 27- 3 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 767.8 767.0 766.6 769.7 771.3 769.6 767.8 769.2 772.4 774.3 772.9 769.5 769.8 MAX. QFE PRESSURE IN HPA 774.8 772.2 772.0 773.3 773.5 774.2 774.2 773.2 776.9 777.9 778.1 775.4 778.1 DAY 3 7 17 9 17 13 31 1 15 28 6 4 MIN. QFE PRESSURE IN HPA 762.0 760.0 760.4 765.3 767.3 764.4 764.1 766.1 769.7 770.4 767.5 755.2 755.2 DAY 19 2 5 25 1 30 18 25 4 31 29 27 MEAN QNH PRESSURE IN HPA 1013.7 1012.6 1012.2 1016.1 1018.1 1016.0 1013.6 1015.5 1019.4 1021.9 1020.0 1015.9 1016.3 MAX. QNH PRESSURE IN HPA 1022.5 1019.2 1019.0 1020.6 1020.8 1021.7 1021.7 1020.5 1025.1 1026.4 1026.6 1023.2 1026.6 DAY 3 7 17 9 17 13 31 1 15 28 6 4 MIN. QNH PRESSURE IN HPA 1006.4 1003.9 1004.4 1010.6 1013.1 1009.4 1009.1 1011.6 1016.1 1017.0 1013.3 997.9 997.9 DAY 19 2 5 25 1 30 18 25 4 31 29 27 MEAN QFF PRESSURE IN HPA 1018.5 1017.9 1010.9 1009.5 1004.6 998.8 993.0 996.2 1004.1 1010.9 1016.4 1016.0 1008.1 MAX. QFF PRESSURE IN HPA 1032.9 1035.8 1024.1 1019.4 1012.3 1004.2 1000.9 1000.0 1008.4 1016.7 1024.5 1037.6 1037.6 DAY 3 7 17 3 8 4 31 1 25 24 16 30 MIN. QFF PRESSURE IN HPA 1006.6 997.7 1001.1 999.6 998.5 993.0 987.4 991.3 999.1 1004.4 1008.4 996.9 987.4 DAY 26 2 9 25 29 30 18 3 12 13 28 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 768.7 768.0 767.7 770.5 771.9 769.9 768.0 769.6 772.9 775.1 774.0 770.5 770.6 MAX. QFE PRESSURE IN HPA 775.9 773.4 772.9 774.9 774.2 774.7 774.6 773.2 777.0 779.3 779.1 776.4 779.3 DAY 3 7 17 12 17 12 31 1 15 28 6 5 MIN. QFE PRESSURE IN HPA 763.0 762.1 762.0 766.3 768.9 764.4 764.5 766.7 770.0 770.8 768.4 756.9 756.9 DAY 19 2 5 25 1 30 18 24 3 31 29 27 MEAN QNH PRESSURE IN HPA 1014.8 1014.0 1013.5 1017.1 1018.9 1016.4 1013.9 1015.9 1020.1 1022.8 1021.5 1017.1 1017.2 MAX. QNH PRESSURE IN HPA 1023.9 1020.7 1020.1 1022.6 1021.7 1022.4 1022.2 1020.5 1025.2 1028.1 1027.9 1024.5 1028.1 DAY 3 7 17 12 17 12 31 1 15 28 6 5 MIN. QNH PRESSURE IN HPA 1007.7 1006.6 1006.4 1011.8 1015.1 1009.4 1009.6 1012.3 1016.5 1017.5 1014.5 1000.0 1000.0 DAY 19 2 5 25 1 30 18 24 3 31 29 27 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 768.4 767.7 767.4 770.4 771.7 769.5 767.2 768.6 771.8 773.9 773.0 769.8 769.9 MAX. QFE PRESSURE IN HPA 775.2 772.9 772.6 775.5 774.2 774.2 773.2 771.9 775.6 777.7 777.4 775.2 777.7 DAY 10 7 17 12 2 12 31 21 15 28 3 5 MIN. QFE PRESSURE IN HPA 763.2 761.7 762.4 766.0 769.5 764.2 763.8 765.2 769.2 770.2 767.8 756.6 756.6 DAY 18 3 5 25 1 30 18 23 17 7 29 27 MEAN QNH PRESSURE IN HPA 1014.4 1013.5 1013.2 1016.9 1018.6 1015.8 1013.0 1014.7 1018.7 1021.3 1020.2 1016.2 1016.4 MAX. QNH PRESSURE IN HPA 1023.0 1020.1 1019.7 1023.4 1021.7 1021.7 1020.5 1018.8 1023.5 1026.1 1025.7 1023.0 1026.1 DAY 10 7 17 12 2 12 31 21 15 28 3 5 MIN. QNH PRESSURE IN HPA 1007.9 1006.1 1006.9 1011.5 1015.8 1009.2 1008.7 1010.5 1015.5 1016.7 1013.7 999.7 999.7 DAY 18 3 5 25 1 30 18 23 17 7 29 27 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 767.8 766.7 766.6 769.6 771.2 768.9 766.7 768.0 770.9 773.1 772.2 769.0 769.2 MAX. QFE PRESSURE IN HPA 774.2 772.0 771.4 773.8 774.4 773.3 771.9 771.1 774.3 776.6 776.6 774.1 776.6 DAY 10 20 17 12 4 12 31 21 14 28 5 5 MIN. QFE PRESSURE IN HPA 762.7 761.1 760.9 765.4 768.8 764.1 763.4 765.2 768.4 769.7 766.9 756.9 756.9 DAY 26 2 23 25 24 30 18 23 3 7 30 27 MEAN QNH PRESSURE IN HPA 1013.7 1012.3 1012.2 1016.0 1018.0 1015.1 1012.3 1014.0 1017.6 1020.3 1019.2 1015.2 1015.5 MAX. QNH PRESSURE IN HPA 1021.7 1019.0 1018.2 1021.2 1022.0 1020.6 1018.8 1017.8 1021.9 1024.7 1024.7 1021.6 1024.7 DAY 10 20 17 12 4 12 31 21 14 28 5 5 MIN. QNH PRESSURE IN HPA 1007.3 1005.3 1005.1 1010.7 1015.0 1009.1 1008.2 1010.5 1014.5 1016.1 1012.6 1000.0 1000.0 DAY 26 2 23 25 24 30 18 23 3 7 30 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 768.1 766.9 766.7 769.6 771.3 768.8 766.7 768.0 771.0 773.6 772.7 769.6 769.4 MAX. QFE PRESSURE IN HPA 775.5 772.1 771.2 774.4 773.5 772.9 772.6 771.1 774.6 777.0 777.1 774.6 777.1 DAY 10 6 17 13 4 12 31 21 14 16 5 5 MIN. QFE PRESSURE IN HPA 763.0 761.1 761.4 765.0 769.3 763.7 763.8 765.5 768.7 770.1 767.3 760.0 760.0 DAY 18 2 23 25 23 30 18 2 3 7 30 27 MEAN QNH PRESSURE IN HPA 1014.0 1012.5 1012.3 1016.0 1018.1 1015.0 1012.4 1014.0 1017.7 1020.9 1019.8 1016.0 1015.7 MAX. QNH PRESSURE IN HPA 1023.4 1019.1 1018.0 1022.0 1020.8 1020.1 1019.7 1017.8 1022.2 1025.2 1025.4 1022.2 1025.4 DAY 10 6 17 13 4 12 31 21 14 16 5 5 MIN. QNH PRESSURE IN HPA 1007.7 1005.3 1005.7 1010.2 1015.6 1008.6 1008.7 1010.8 1014.8 1016.6 1013.1 1003.9 1003.9 DAY 18 2 23 25 23 30 18 2 3 7 30 27 MEAN QFF PRESSURE IN HPA 1018.7 1017.6 1010.8 1009.2 1004.6 997.8 991.8 995.0 1002.5 1010.1 1016.2 1016.1 1007.5 MAX. QFF PRESSURE IN HPA 1033.5 1034.8 1024.3 1019.5 1011.4 1002.9 999.3 998.9 1006.3 1015.7 1023.1 1038.2 1038.2 DAY 20 7 15 3 8 1 31 31 24 28 15 29 MIN. QFF PRESSURE IN HPA 1007.2 1000.7 999.6 1000.2 1000.0 992.7 987.4 990.3 998.7 1004.9 1008.8 1002.0 987.4 DAY 26 2 3 30 22 30 16 2 11 1 28 26 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 KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -8.4 -6.3 1.1 8.0 13.8 20.4 23.1 22.8 18.0 12.8 6.4 -2.5 9.1 MINIMUN AIR TEMPERATURE (C) -15.3 -13.4 -4.2 1.2 6.5 10.3 14.1 14.2 9.5 4.7 0.4 -9.0 1.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 1 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 30 22 17 3 0 0 0 0 0 0 2 22 96 DAYS WITH FREEZING MIN.<= 0 31 27 25 10 0 0 0 0 0 1 14 27 135 TEMPERATURE RECORDS LOWEST(C) -27.0 -26.6 -17.0 -10.5 2.0 6.2 10.4 10.4 4.4 -0.4 -4.5 -18.0 -27.0 DAY 31 7 31 2 1 13 8 19 30 24 5 17 MAXIMUM AIR TEMPERATURE (C) -2.3 -0.1 5.7 12.5 19.8 27.7 30.2 29.9 25.6 20.7 10.3 3.5 15.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 7 16 15 3 0 0 0 41 DAYS WITH MAXIMUM TEMP. <= 0 26 16 2 0 0 0 0 0 0 0 0 4 48 TEMPERATURE RECORDS HIGHEST(C) 4.8 8.0 9.0 18.5 27.0 32.4 33.8 31.6 30.8 26.4 15.2 8.6 33.8 DAY 20 28 8 17 30 26 10 26 1 9 4 1 DIF. BETWEEN (MAX.-MIN.) (C) 13.0 13.3 9.9 11.3 13.3 17.4 16.1 15.7 16.1 16.0 9.9 12.5 13.7 MEAN DAILY TEMP. (MDT) (C) -8.8 -6.8 0.7 6.8 13.2 19.0 22.2 22.0 17.6 12.7 5.4 -2.8 8.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 6.1 45.9 34.9 4.2 0.0 0.0 0.0 91.2 HEATING DEG. DAYS(BASE 18 0C) 830.9 693.7 534.8 334.7 150.0 10.4 0.0 0.0 44.3 164.5 379.2 643.8 3786.4 DEWPOINT (MEAN C) -13.4 -12.0 -4.5 -1.3 -1.0 -3.1 0.6 0.3 -3.7 -4.7 -3.0 -7.5 -4.5 MIXING RATIO (G/KG) 1.95 2.23 3.68 4.76 4.79 4.10 5.33 5.17 3.99 3.60 4.18 3.09 3.91 VAPOUR PRESSURE (HPA) 2.39 2.74 4.50 5.86 5.89 5.04 6.53 6.35 4.91 4.45 5.16 3.80 4.80 SATURATION DEF. (HPA) 1.14 1.56 2.39 5.29 10.84 20.18 22.91 22.41 16.97 11.27 4.68 1.69 10.11 RELATIVE HUMIDITY (MEAN %) 69 66 68 56 42 23 25 24 25 32 56 71 46 RELATIVE HUMIDITY (MAX. %) 82 82 85 74 70 44 43 42 42 52 74 85 65 RELATIVE HUMIDITY (MIN. %) 53 52 54 37 23 11 14 14 13 18 40 56 32 RELATIVE HUMIDITY (MEAN% 03UTC) 75 75 81 72 63 43 42 40 41 49 69 78 61 RELATIVE HUMIDITY (MEAN% 09UTC) 67 60 63 45 28 13 17 16 15 23 48 63 38 RELATIVE HUMIDITY (MEAN% 15UTC) 66 63 66 48 30 15 16 17 19 24 56 70 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 195.9 135.1 231.1 39.5 89.5 0.0 0.0 0.0 0.0 6.3 225.0 332.2 1254.6 DAYS WITH PRECIPITATION >=10 8 4 9 2 3 0 0 0 0 0 6 8 40 DAYS WITH PRECIPITATION >= 5 8 6 10 2 3 0 0 0 0 1 7 8 45 DAYS WITH PRECIPITATION >= 1 13 10 12 5 4 0 0 0 0 1 11 9 65 DAYS WITH PRECIPITATION 14 10 15 10 6 0 0 0 0 2 11 10 78 GREATEST DAILY PRECIPITATION 47.0 71.0 34.0 22.0 40.0 0.0 0.0 0.0 0.0 6.0 49.0 142.0 142.0 DAY 23 19 10 23 7 ** ** ** ** 31 7 4 DAY WITH THUNDER STORM 0 1 10 2 1 0 0 0 0 0 4 2 20 DAYS WITH SNOW OR SLEET 14 12 9 1 0 0 0 0 0 0 3 7 46 DAYS WITH DUST 0 1 2 0 0 0 0 0 0 1 0 0 4 WIND DIRECTION (PREVAILING) 270 225 225 270 270 270 270 225 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.6 10.5 9.7 7.1 7.0 7.0 7.4 7.6 8.8 7.4 9.0 10.4 7.9 PREVAILING WIND PERCENT 5.8 7.9 16.8 32.2 14.9 16.7 11.7 16.1 19.2 16.1 19.3 11.6 14.8 CALMS PERCENT OF WIND 81.9 75.7 58.7 47.8 60.1 54.2 55.6 58.5 54.6 68.1 52.0 74.8 60.9 NO. OF WIND OBSERVATION 155 140 155 180 248 240 248 248 240 248 150 155 2407 VECTOR WIND DIRECTION (MEAN) 268 256 239 265 278 260 233 237 252 262 270 250 257 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.8 2.7 2.9 2.1 2.0 1.0 1.7 2.6 1.8 2.7 1.9 2.0 WIND STEADINESES (MEAN %) 53.3 75.0 69.2 82.9 80.8 69.0 34.5 54.8 74.3 78.3 67.5 76.0 69.0 WIND SPEED (MEAN KNOTS) 1.5 2.4 3.9 3.5 2.6 2.9 2.9 3.1 3.5 2.3 4.0 2.5 2.9 FASTEST WIND DIRECTION 270 240 160 300 320 120 90 210 290 210 180 240 160 FASTEST WIND SPEED (KNOTS) 16 27 35 16 23 23 23 27 23 16 29 29 35 DAY 17 11 28 29 12 10 23 20 19 31 16 1 DAYS WITH SKY CLEAR (0-2)/8 19 16 12 11 22 29 31 27 28 22 15 21 253 DAYS WITH P.CLOUDY (3-6)/8 7 7 9 14 3 1 0 4 2 9 10 5 71 DAYS WITH CLOUDY (7-8)/8 5 5 10 5 6 0 0 0 0 0 5 5 41 DAYS WITH VISIBILITY =< 2 KM 9 10 7 0 0 0 0 0 0 1 0 1 28 DURATION OF SUNSHINE HOURS 134.6 154.0 169.0 235.7 304.3 366.1 359.1 322.1 301.2 256.2 159.3 157.7 2919.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 766.5 768.5 767.0 771.5 771.9 770.0 770.2 770.0 771.5 774.2 772.7 769.5 770.3 MAX. QFE PRESSURE IN HPA 771.6 773.9 772.8 776.6 774.3 774.0 774.0 774.2 778.0 779.3 777.8 774.6 779.3 DAY-HOUR 22- 6 8- 6 8- 6 9- 6 24- 6 4- 6 20- 6 26- 6 24- 6 27- 6 29- 6 19- 6 MIN. QFE PRESSURE IN HPA 760.4 759.9 757.0 767.6 768.7 766.7 766.0 764.4 767.7 770.4 769.1 763.0 757.0 DAY-HOUR 11-15 14- 3 15-15 23- 0 31-21 10-21 31-15 1-15 12-12 1-12 16-12 4-12 MEAN QNH PRESSURE IN HPA 1012.1 1014.6 1012.7 1018.3 1018.8 1016.5 1016.7 1016.5 1018.3 1021.7 1019.9 1015.9 1016.8 MAX. QNH PRESSURE IN HPA 1018.5 1021.3 1020.0 1024.7 1021.9 1021.5 1021.5 1021.7 1026.5 1028.1 1026.2 1022.2 1028.1 DAY-HOUR 22- 6 8- 6 8- 6 9- 6 24- 6 4- 6 20- 6 26- 6 24- 6 27- 6 29- 6 19- 6 MIN. QNH PRESSURE IN HPA 1004.4 1003.8 1000.2 1013.5 1014.8 1012.3 1011.5 1009.4 1013.6 1017.0 1015.3 1007.7 1000.2 DAY-HOUR 11-15 14- 3 15-15 23- 0 31-21 10-21 31-15 1-15 12-12 1-12 16-12 4-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.3 997.2 994.8 994.9 1001.0 1009.2 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.8 1004.1 1001.0 1001.8 1013.5 1018.0 ****** ****** ****** DAY-HOUR **-** **-** **-** **-** 13- 3 4- 3 9- 3 19- 3 24- 3 27- 6 **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 995.5 989.5 988.7 987.7 993.2 1001.4 ****** ****** ****** DAY-HOUR **-** **-** **-** **-** 31-21 30-21 5-21 1-21 5-21 10-12 **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 771.7 769.8 770.3 770.0 771.4 774.0 ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 773.6 773.3 773.2 773.1 776.7 777.9 ****** ****** ****** DAY ** ** ** ** 25 4 20 27 24 27 ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 769.7 766.7 767.2 765.0 768.0 770.7 ****** ****** ****** DAY ** ** ** ** 11 11 6 2 12 2 ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.5 1016.3 1016.8 1016.5 1018.3 1021.5 ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1021.0 1020.6 1020.5 1020.3 1024.9 1026.4 ****** ****** ****** DAY ** ** ** ** 25 4 20 27 24 27 ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1016.1 1012.3 1013.0 1010.2 1014.0 1017.3 ****** ****** ****** DAY ** ** ** ** 11 11 6 2 12 2 ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.0 997.3 994.9 994.8 1000.6 1008.5 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1011.9 1002.6 999.6 998.9 1010.7 1014.9 ****** ****** ****** DAY ** ** ** ** 13 4 9 9 24 27 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 999.4 992.1 990.3 988.9 995.2 1003.1 ****** ****** ****** DAY ** ** ** ** 31 30 15 2 6 10 ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 766.4 768.0 766.9 771.6 772.0 770.2 770.8 770.6 771.9 774.6 772.6 769.5 770.4 MAX. QFE PRESSURE IN HPA 770.7 773.0 772.3 775.7 774.2 773.6 773.8 773.5 777.3 778.4 776.8 774.1 778.4 DAY 22 8 1 9 25 4 20 8 24 27 29 19 MIN. QFE PRESSURE IN HPA 760.5 759.9 758.4 768.0 769.9 766.9 767.7 765.6 768.3 771.1 769.6 765.3 758.4 DAY 12 14 30 23 11 11 6 2 13 2 12 5 MEAN QNH PRESSURE IN HPA 1011.9 1014.0 1012.6 1018.5 1019.0 1016.7 1017.4 1017.2 1018.8 1022.2 1019.7 1015.9 1017.0 MAX. QNH PRESSURE IN HPA 1017.3 1020.2 1019.3 1023.6 1021.7 1021.0 1021.2 1020.8 1025.6 1027.0 1025.0 1021.6 1027.0 DAY 22 8 1 9 25 4 20 8 24 27 29 19 MIN. QNH PRESSURE IN HPA 1004.6 1003.8 1001.9 1014.0 1016.3 1012.6 1013.6 1011.0 1014.3 1017.8 1016.0 1010.6 1001.9 DAY 12 14 30 23 11 11 6 2 13 2 12 5 MEAN QFF PRESSURE IN HPA 1021.9 1023.2 1012.8 1012.7 1006.9 998.9 996.9 997.6 1003.6 1011.8 1015.2 1020.3 1010.1 MAX. QFF PRESSURE IN HPA 1035.8 1040.4 1026.1 1024.0 1013.8 1004.1 1001.0 1001.8 1013.5 1017.5 1021.8 1034.4 1040.4 DAY 31 7 31 2 13 4 9 19 24 27 26 19 MIN. QFF PRESSURE IN HPA 1006.6 1004.2 1000.4 1004.5 1001.2 993.9 991.9 991.8 997.9 1005.5 1006.9 1007.0 991.8 DAY 3 23 28 30 31 10 15 2 6 30 16 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 767.4 769.2 767.7 772.4 772.6 770.6 771.1 771.1 772.5 775.5 773.6 770.5 771.2 MAX. QFE PRESSURE IN HPA 771.6 773.9 772.8 776.6 774.3 774.0 774.0 774.2 778.0 779.3 777.8 774.6 779.3 DAY 22 8 8 9 24 4 20 26 24 27 29 19 MIN. QFE PRESSURE IN HPA 762.2 761.9 759.6 768.6 770.2 767.6 767.6 765.9 769.1 772.0 770.2 765.8 759.6 DAY 17 14 30 23 11 11 5 2 13 2 15 5 MEAN QNH PRESSURE IN HPA 1013.2 1015.5 1013.6 1019.5 1019.7 1017.2 1017.8 1017.8 1019.6 1023.4 1021.0 1017.0 1017.9 MAX. QNH PRESSURE IN HPA 1018.5 1021.3 1020.0 1024.7 1021.9 1021.5 1021.5 1021.7 1026.5 1028.1 1026.2 1022.2 1028.1 DAY 22 8 8 9 24 4 20 26 24 27 29 19 MIN. QNH PRESSURE IN HPA 1006.7 1006.3 1003.4 1014.7 1016.7 1013.5 1013.5 1011.3 1015.3 1019.0 1016.7 1011.2 1003.4 DAY 17 14 30 23 11 11 5 2 13 2 15 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.8 997.1 995.3 995.7 1001.9 1010.5 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.6 1002.2 999.7 1000.0 1012.6 1018.0 ****** ****** ****** DAY ** ** ** ** 8 4 8 8 23 27 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 997.8 992.0 989.9 989.8 996.2 1004.8 ****** ****** ****** DAY ** ** ** ** 31 30 5 2 6 1 ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 766.8 769.0 767.4 772.1 772.2 770.1 770.3 770.1 771.4 774.2 772.8 769.6 770.5 MAX. QFE PRESSURE IN HPA 770.7 773.3 772.3 776.1 774.2 773.0 773.2 773.2 776.4 777.5 776.7 773.7 777.5 DAY 22 8 7 9 13 4 20 26 24 27 28 18 MIN. QFE PRESSURE IN HPA 762.5 762.5 759.5 768.4 769.8 767.3 766.9 765.4 767.9 770.8 769.8 764.8 759.5 DAY 17 14 29 23 11 7 5 2 12 1 15 5 MEAN QNH PRESSURE IN HPA 1012.5 1015.2 1013.2 1019.1 1019.2 1016.6 1016.9 1016.6 1018.3 1021.7 1020.0 1015.9 1017.1 MAX. QNH PRESSURE IN HPA 1017.3 1020.6 1019.3 1024.1 1021.7 1020.2 1020.5 1020.5 1024.5 1025.9 1024.9 1021.1 1025.9 DAY 22 8 7 9 13 4 20 26 24 27 28 18 MIN. QNH PRESSURE IN HPA 1007.1 1007.1 1003.3 1014.5 1016.2 1013.1 1012.6 1010.7 1013.8 1017.5 1016.2 1009.9 1003.3 DAY 17 14 29 23 11 7 5 2 12 1 15 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.7 996.3 994.2 993.7 999.5 1007.8 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.1 1001.7 997.7 998.3 1010.2 1013.9 ****** ****** ****** DAY ** ** ** ** 8 3 28 8 23 24 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 997.0 991.4 989.3 988.1 993.5 1001.5 ****** ****** ****** DAY ** ** ** ** 31 30 16 1 12 1 ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 765.9 768.0 766.5 771.2 771.4 769.6 769.4 769.2 770.6 773.1 772.1 768.9 769.7 MAX. QFE PRESSURE IN HPA 769.6 772.3 771.7 775.0 773.7 772.3 772.0 772.1 774.4 776.0 775.9 772.8 776.0 DAY 19 20 7 9 12 3 9 26 23 27 28 18 MIN. QFE PRESSURE IN HPA 761.5 761.4 759.1 767.6 769.0 767.1 766.4 764.5 767.7 770.4 769.1 763.0 759.1 DAY 2 22 29 29 16 7 31 1 12 1 16 4 MEAN QNH PRESSURE IN HPA 1011.3 1014.0 1012.1 1017.9 1018.2 1016.0 1015.8 1015.4 1017.3 1020.4 1019.1 1015.0 1016.0 MAX. QNH PRESSURE IN HPA 1016.0 1019.3 1018.6 1022.7 1021.1 1019.3 1019.0 1019.1 1022.0 1024.0 1023.9 1020.0 1024.0 DAY 19 20 7 9 12 3 9 26 23 27 28 18 MIN. QNH PRESSURE IN HPA 1005.8 1005.7 1002.8 1013.5 1015.2 1012.8 1012.0 1009.6 1013.6 1017.0 1015.3 1007.7 1002.8 DAY 2 22 29 29 16 7 31 1 12 1 16 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.7 997.0 993.9 993.7 999.7 1007.4 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.5 1002.3 998.0 997.5 1007.4 1013.1 ****** ****** ****** DAY ** ** ** ** 13 3 8 8 23 25 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 999.4 992.0 990.3 987.7 994.7 1001.4 ****** ****** ****** DAY ** ** ** ** 31 30 5 1 5 10 ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 766.2 768.4 766.6 771.2 771.4 769.6 769.2 769.0 770.7 773.5 772.5 769.3 769.8 MAX. QFE PRESSURE IN HPA 770.4 772.8 771.7 774.7 774.0 772.0 772.1 771.9 774.6 776.8 776.4 774.1 776.8 DAY 18 8 7 9 12 25 8 26 23 27 28 18 MIN. QFE PRESSURE IN HPA 760.4 760.1 757.0 767.8 769.0 767.0 766.0 764.4 768.0 770.9 769.5 763.5 757.0 DAY 11 22 15 29 16 7 31 1 12 1 15 4 MEAN QNH PRESSURE IN HPA 1011.7 1014.4 1012.2 1018.0 1018.2 1015.9 1015.5 1015.3 1017.4 1020.9 1019.6 1015.6 1016.2 MAX. QNH PRESSURE IN HPA 1017.0 1020.0 1018.6 1022.4 1021.5 1019.0 1019.1 1018.8 1022.2 1025.0 1024.5 1021.6 1025.0 DAY 18 8 7 9 12 25 8 26 23 27 28 18 MIN. QNH PRESSURE IN HPA 1004.4 1004.1 1000.2 1013.7 1015.2 1012.7 1011.5 1009.4 1014.0 1017.6 1015.8 1008.3 1000.2 DAY 11 22 15 29 16 7 31 1 12 1 15 4 MEAN QFF PRESSURE IN HPA 1021.8 1023.3 1012.3 1012.0 1006.1 998.2 995.1 995.7 1002.2 1010.5 1015.1 1020.0 1009.4 MAX. QFF PRESSURE IN HPA 1032.0 1039.8 1025.6 1021.9 1012.3 1002.3 999.9 999.4 1009.0 1015.7 1020.2 1034.4 1039.8 DAY 15 7 31 2 12 2 8 8 23 24 27 18 MIN. QFF PRESSURE IN HPA 1004.6 1000.6 996.8 1004.6 1001.2 994.0 991.0 990.4 997.3 1006.3 1008.2 1004.8 990.4 DAY 2 22 15 29 30 30 16 1 5 10 16 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 772.2 770.3 770.1 770.1 771.7 774.3 ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 773.8 772.7 773.0 773.0 776.8 777.7 ****** ****** ****** DAY ** ** ** ** 12 3 8 26 23 26 ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 769.8 766.9 766.4 764.8 768.6 770.9 ****** ****** ****** DAY ** ** ** ** 16 10 31 1 11 1 ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1019.2 1016.8 1016.6 1016.5 1018.5 1021.8 ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1021.2 1019.8 1020.2 1020.2 1025.0 1026.1 ****** ****** ****** DAY ** ** ** ** 12 3 8 26 23 26 ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1016.2 1012.6 1012.0 1009.9 1014.7 1017.6 ****** ****** ****** DAY ** ** ** ** 16 10 31 1 11 1 ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.3 996.8 994.3 994.5 1001.1 1009.2 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.0 1001.7 999.3 998.4 1011.9 1016.6 ****** ****** ****** DAY ** ** ** ** 8 2 8 8 23 26 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 997.8 991.3 990.4 988.1 995.4 1003.8 ****** ****** ****** DAY ** ** ** ** 31 30 31 1 11 1 ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 771.8 770.0 770.2 770.1 771.5 774.2 ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 773.8 773.6 773.0 772.9 776.7 777.9 ****** ****** ****** DAY ** ** ** ** 24 3 19 26 23 26 ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 768.7 766.7 766.2 764.4 768.1 770.6 ****** ****** ****** DAY ** ** ** ** 31 10 31 1 12 1 ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.8 1016.5 1016.8 1016.5 1018.3 1021.7 ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1021.2 1021.0 1020.2 1020.1 1024.9 1026.4 ****** ****** ****** DAY ** ** ** ** 24 3 19 26 23 26 ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1014.8 1012.3 1011.7 1009.4 1014.1 1017.2 ****** ****** ****** DAY ** ** ** ** 31 10 31 1 12 1 ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.0 996.0 994.1 993.6 999.6 1008.0 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.3 1001.7 998.5 997.7 1010.2 1014.2 ****** ****** ****** DAY ** ** ** ** 8 3 8 8 23 26 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 995.5 989.5 988.7 987.7 993.2 1001.9 ****** ****** ****** DAY ** ** ** ** 31 30 5 1 5 1 ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.6 -2.8 1.8 9.0 17.7 22.9 24.1 24.6 21.3 13.5 8.7 2.4 11.5 MINIMUN AIR TEMPERATURE (C) -12.3 -9.0 -3.9 2.6 8.1 11.3 14.8 14.6 10.0 4.7 -0.1 -4.5 3.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 29 20 15 2 0 0 0 0 0 0 2 15 83 DAYS WITH FREEZING MIN.<= 0 31 28 24 9 0 0 0 0 0 1 16 26 135 TEMPERATURE RECORDS LOWEST(C) -26.8 -22.6 -12.6 -5.0 3.0 7.0 10.2 12.2 7.4 -2.6 -4.6 -24.6 -26.8 DAY 26 13 21 6 15 18 5 24 3 31 14 28 MAXIMUM AIR TEMPERATURE (C) -0.3 2.4 6.5 12.8 22.2 28.0 29.8 31.1 27.7 19.0 14.9 7.3 16.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 7 18 29 1 0 0 0 55 DAYS WITH MAXIMUM TEMP. <= 0 15 6 0 0 0 0 0 0 0 0 0 4 25 TEMPERATURE RECORDS HIGHEST(C) 5.0 8.4 10.0 20.2 27.2 31.6 31.4 33.8 30.2 24.0 20.0 16.4 33.8 DAY 6 18 6 26 24 30 24 13 4 7 5 1 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 11.4 10.4 10.2 14.1 16.7 15.0 16.5 17.7 14.3 15.0 11.8 13.8 MEAN DAILY TEMP. (MDT) (C) -6.3 -3.3 1.3 7.7 15.1 19.7 22.3 22.9 18.9 11.8 7.4 1.4 9.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 7.8 48.3 58.0 0.3 0.0 0.0 0.0 114.5 HEATING DEG. DAYS(BASE 18 0C) 753.5 596.9 518.7 308.6 90.0 4.5 0.0 0.0 5.4 191.2 317.7 513.9 3300.4 DEWPOINT (MEAN C) -10.3 -8.2 -5.6 -4.1 -1.2 -2.4 2.7 2.3 -2.8 -3.3 -5.2 -9.5 -4.0 MIXING RATIO (G/KG) 2.46 2.91 3.41 3.85 4.66 4.32 6.34 6.01 4.15 4.03 3.46 2.58 4.01 VAPOUR PRESSURE (HPA) 3.02 3.56 4.19 4.73 5.72 5.31 7.74 7.37 5.11 4.98 4.27 3.18 4.93 SATURATION DEF. (HPA) 1.32 1.76 3.02 7.41 15.39 23.86 23.37 24.76 21.75 11.35 7.65 4.94 12.21 RELATIVE HUMIDITY (MEAN %) 71 69 61 43 31 21 27 25 22 36 42 47 41 RELATIVE HUMIDITY (MAX. %) 82 81 76 59 50 40 49 42 40 56 68 65 59 RELATIVE HUMIDITY (MIN. %) 59 56 47 31 21 12 18 16 13 22 24 33 29 RELATIVE HUMIDITY (MEAN% 03UTC) 75 75 70 57 49 40 47 42 40 54 68 59 56 RELATIVE HUMIDITY (MEAN% 09UTC) 67 64 56 37 24 14 21 17 15 27 30 39 34 RELATIVE HUMIDITY (MEAN% 15UTC) 71 67 59 40 26 15 21 19 16 31 34 46 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 164.5 215.4 263.8 89.1 8.2 0.0 0.4 0.0 0.0 34.6 20.1 119.6 915.7 DAYS WITH PRECIPITATION >=10 5 7 5 3 0 0 0 0 0 2 1 2 25 DAYS WITH PRECIPITATION >= 5 11 7 7 4 1 0 0 0 0 2 1 5 38 DAYS WITH PRECIPITATION >= 1 15 11 13 4 3 0 0 0 0 4 2 8 60 DAYS WITH PRECIPITATION 16 12 14 7 3 0 1 0 0 4 3 9 69 GREATEST DAILY PRECIPITATION 47.0 56.0 96.0 39.0 6.0 0.0 0.4 0.0 0.0 19.0 18.0 71.0 96.0 DAY 5 5 14 3 12 ** 10 ** ** 29 13 25 DAY WITH THUNDER STORM 3 2 1 2 1 0 1 1 0 1 0 1 13 DAYS WITH SNOW OR SLEET 14 11 9 2 0 0 0 0 0 0 0 9 45 DAYS WITH DUST 1 3 2 1 3 0 0 0 0 0 0 0 10 WIND DIRECTION (PREVAILING) 225 225 270 270 315 270 270 270 270 270 270 315 270 PREVAILING WIND SPEED(KNOTS) 9.5 9.5 8.0 8.8 7.9 7.5 9.2 7.9 8.4 8.4 8.4 9.2 8.4 PREVAILING WIND PERCENT 13.5 13.6 16.8 22.7 21.3 23.3 12.0 16.4 20.0 26.5 16.7 18.7 17.0 CALMS PERCENT OF WIND 70.3 65.0 60.0 44.7 38.1 50.0 58.7 58.2 53.3 48.4 64.0 51.6 55.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 184 189 150 155 150 155 1888 VECTOR WIND DIRECTION (MEAN) 245 223 249 263 295 265 211 251 249 273 259 282 260 VECTOR WIND MAGNITUDE(KNOTS) 2.0 2.3 1.9 3.5 2.5 2.8 0.7 1.9 2.5 3.0 1.8 3.2 2.2 WIND STEADINESES (MEAN %) 74.1 67.6 63.3 74.5 56.8 70.0 21.2 59.4 65.8 69.8 62.1 74.4 59.5 WIND SPEED (MEAN KNOTS) 2.7 3.4 3.0 4.7 4.4 4.0 3.3 3.2 3.8 4.3 2.9 4.3 3.7 FASTEST WIND DIRECTION 250 220 270 300 190 270 290 310 280 250 300 310 220 FASTEST WIND SPEED (KNOTS) 29 39 29 23 29 16 16 23 27 19 19 17 39 DAY 8 19 12 13 5 6 3 14 2 14 13 15 DAYS WITH SKY CLEAR (0-2)/8 14 15 17 17 26 30 20 27 30 24 25 21 266 DAYS WITH P.CLOUDY (3-6)/8 10 6 6 8 4 0 11 4 0 4 3 6 62 DAYS WITH CLOUDY (7-8)/8 7 7 8 5 1 0 0 0 0 3 2 4 37 DAYS WITH VISIBILITY =< 2 KM 4 3 2 3 0 0 0 0 0 0 0 0 12 DURATION OF SUNSHINE HOURS 129.9 154.7 198.3 229.6 350.7 373.0 316.5 ****** 333.0 ****** 333.0 ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 767.7 765.7 770.1 769.0 770.8 769.8 768.4 769.6 771.3 773.7 773.4 770.3 770.0 MAX. QFE PRESSURE IN HPA 775.1 772.9 777.8 774.6 776.0 775.6 773.5 774.0 775.5 778.2 779.7 777.9 779.7 DAY-HOUR 20- 6 8- 6 10- 6 25- 6 18- 6 5- 6 16- 6 4- 6 26- 6 19- 6 23- 6 5- 6 MIN. QFE PRESSURE IN HPA 762.3 756.5 764.4 763.8 762.8 765.2 763.0 766.6 767.4 768.6 767.5 760.0 756.5 DAY-HOUR 23- 3 15-15 19-12 1-15 12-15 27- 3 5- 9 8-12 4-15 14-12 1-12 25-12 MEAN QNH PRESSURE IN HPA 1013.5 1011.1 1016.7 1015.2 1017.5 1016.2 1014.4 1016.0 1018.1 1021.0 1020.8 1016.8 1016.4 MAX. QNH PRESSURE IN HPA 1022.8 1020.1 1026.2 1022.2 1024.0 1023.5 1020.8 1021.5 1023.4 1026.7 1028.6 1026.4 1028.6 DAY-HOUR 20- 6 8- 6 10- 6 25- 6 18- 6 5- 6 16- 6 4- 6 26- 6 19- 6 23- 6 5- 6 MIN. QNH PRESSURE IN HPA 1006.8 999.5 1009.4 1008.7 1007.4 1010.5 1007.7 1012.2 1013.2 1014.7 1013.3 1003.9 999.5 DAY-HOUR 23- 3 15-15 19-12 1-15 12-15 27- 3 5- 9 8-12 4-15 14-12 1-12 25-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 994.1 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.7 ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 24- 3 **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 989.4 ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 7-21 **-** **-** **-** **-** 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 767.3 765.5 769.9 768.8 771.0 770.1 768.9 770.1 771.8 773.7 773.6 770.2 770.1 MAX. QFE PRESSURE IN HPA 774.0 771.5 776.4 774.1 775.4 775.5 773.0 773.2 774.6 777.2 779.4 776.5 779.4 DAY 20 8 10 25 18 5 17 5 16 19 23 5 MIN. QFE PRESSURE IN HPA 762.3 758.3 765.0 763.9 763.4 765.2 763.5 767.1 769.0 768.7 768.9 761.0 758.3 DAY 23 10 19 10 13 27 5 9 4 14 1 25 MEAN QNH PRESSURE IN HPA 1013.1 1010.8 1016.3 1015.0 1017.7 1016.6 1015.1 1016.6 1018.7 1021.1 1021.0 1016.7 1016.6 MAX. QNH PRESSURE IN HPA 1021.5 1018.3 1024.5 1021.6 1023.2 1023.4 1020.2 1020.5 1022.2 1025.5 1028.2 1024.6 1028.2 DAY 20 8 10 25 18 5 17 5 16 19 23 5 MIN. QNH PRESSURE IN HPA 1006.8 1001.8 1010.2 1008.8 1008.2 1010.5 1008.3 1012.8 1015.2 1014.8 1015.1 1005.2 1001.8 DAY 23 10 19 10 13 27 5 9 4 14 1 25 MEAN QFF PRESSURE IN HPA 1020.5 1015.3 1016.4 1008.1 1003.4 998.3 994.7 996.2 1002.5 1011.2 1015.8 1016.7 1008.3 MAX. QFF PRESSURE IN HPA 1039.9 1031.2 1027.3 1013.7 1009.5 1006.4 999.2 999.7 1007.3 1017.7 1025.4 1040.9 1040.9 DAY 26 13 10 25 15 1 15 24 26 19 23 29 MIN. QFF PRESSURE IN HPA 1006.9 1000.4 1007.3 998.6 994.8 989.9 989.5 992.4 997.1 1001.1 1006.8 1004.8 989.5 DAY 23 10 24 16 12 27 4 27 2 14 1 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 768.6 766.5 771.0 769.6 771.5 770.4 769.2 770.6 772.5 774.6 774.7 771.3 770.9 MAX. QFE PRESSURE IN HPA 775.1 772.9 777.8 774.6 776.0 775.6 773.5 774.0 775.5 778.2 779.7 777.9 779.7 DAY 20 8 10 25 18 5 16 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 764.3 757.6 765.3 764.7 764.0 765.4 763.5 767.6 769.4 768.9 769.6 761.4 757.6 DAY 18 10 19 16 13 27 5 9 4 14 1 25 MEAN QNH PRESSURE IN HPA 1014.7 1012.1 1017.8 1016.0 1018.3 1017.0 1015.5 1017.2 1019.6 1022.2 1022.3 1018.0 1017.6 MAX. QNH PRESSURE IN HPA 1022.8 1020.1 1026.2 1022.2 1024.0 1023.5 1020.8 1021.5 1023.4 1026.7 1028.6 1026.4 1028.6 DAY 20 8 10 25 18 5 16 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1009.3 1000.9 1010.6 1009.8 1008.9 1010.7 1008.3 1013.5 1015.7 1015.1 1016.0 1005.7 1000.9 DAY 18 10 19 16 13 27 5 9 4 14 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 767.9 766.0 770.6 769.3 771.1 769.9 768.4 769.7 771.4 773.7 773.5 770.4 770.2 MAX. QFE PRESSURE IN HPA 774.5 772.4 777.2 774.0 775.5 775.4 772.6 773.2 774.6 777.0 778.6 776.5 778.6 DAY 26 8 10 26 18 4 16 4 26 19 23 6 MIN. QFE PRESSURE IN HPA 763.5 759.3 764.8 764.3 764.5 765.8 763.0 767.4 768.3 769.1 768.6 760.5 759.3 DAY 17 10 19 6 13 27 5 8 4 14 1 25 MEAN QNH PRESSURE IN HPA 1013.9 1011.5 1017.3 1015.6 1017.8 1016.3 1014.4 1016.0 1018.2 1021.1 1020.9 1017.0 1016.7 MAX. QNH PRESSURE IN HPA 1022.1 1019.5 1025.5 1021.5 1023.4 1023.2 1019.7 1020.5 1022.2 1025.2 1027.2 1024.6 1027.2 DAY 26 8 10 26 18 4 16 4 26 19 23 6 MIN. QNH PRESSURE IN HPA 1008.3 1003.1 1009.9 1009.3 1009.6 1011.2 1007.7 1013.2 1014.3 1015.3 1014.7 1004.6 1003.1 DAY 17 10 19 6 13 27 5 8 4 14 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 767.1 765.1 769.6 768.7 770.3 769.2 767.6 768.8 770.4 773.0 772.5 769.5 769.3 MAX. QFE PRESSURE IN HPA 773.3 770.8 775.7 773.2 774.3 774.8 772.0 772.6 773.4 776.5 776.9 776.1 776.9 DAY 26 8 9 27 18 4 15 4 27 15 23 5 MIN. QFE PRESSURE IN HPA 762.3 757.2 764.4 764.0 764.1 765.7 763.0 766.6 767.5 768.6 767.5 760.0 757.2 DAY 28 15 19 2 12 27 5 8 4 14 1 25 MEAN QNH PRESSURE IN HPA 1012.8 1010.3 1015.9 1014.8 1016.9 1015.5 1013.5 1015.0 1017.0 1020.3 1019.5 1015.8 1015.6 MAX. QNH PRESSURE IN HPA 1020.6 1017.5 1023.6 1020.5 1021.9 1022.5 1019.0 1019.7 1020.7 1024.6 1025.1 1024.1 1025.1 DAY 26 8 9 27 18 4 15 4 27 15 23 5 MIN. QNH PRESSURE IN HPA 1006.8 1000.4 1009.4 1008.9 1009.1 1011.1 1007.7 1012.2 1013.3 1014.7 1013.3 1003.9 1000.4 DAY 28 15 19 2 12 27 5 8 4 14 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 767.5 765.4 769.6 768.6 770.3 769.2 767.5 768.9 770.4 773.3 773.0 770.1 769.5 MAX. QFE PRESSURE IN HPA 773.9 770.6 776.0 772.9 774.3 774.5 771.2 772.8 773.4 776.7 777.2 776.5 777.2 DAY 26 7 9 27 18 4 15 4 22 15 22 5 MIN. QFE PRESSURE IN HPA 762.7 756.5 765.0 763.8 762.8 765.8 763.3 766.7 767.4 769.3 768.0 761.2 756.5 DAY 17 15 19 1 12 26 5 1 4 14 1 25 MEAN QNH PRESSURE IN HPA 1013.3 1010.7 1016.0 1014.8 1016.8 1015.4 1013.4 1015.0 1017.0 1020.6 1020.3 1016.6 1015.8 MAX. QNH PRESSURE IN HPA 1021.3 1017.2 1024.0 1020.1 1021.9 1022.1 1018.0 1020.0 1020.7 1024.9 1025.5 1024.6 1025.5 DAY 26 7 9 27 18 4 15 4 22 15 22 5 MIN. QNH PRESSURE IN HPA 1007.3 999.5 1010.2 1008.7 1007.4 1011.2 1008.1 1012.3 1013.2 1015.6 1014.0 1005.4 999.5 DAY 17 15 19 1 12 26 5 1 4 14 1 25 MEAN QFF PRESSURE IN HPA 1020.7 1015.0 1015.8 1007.7 1002.6 997.2 993.1 994.6 1000.8 1010.8 1015.1 1016.7 1007.5 MAX. QFF PRESSURE IN HPA 1041.1 1030.5 1026.2 1013.0 1008.4 1004.2 997.1 999.2 1005.5 1015.8 1023.3 1043.2 1043.2 DAY 26 13 21 11 15 4 8 4 26 19 14 28 MIN. QFF PRESSURE IN HPA 1008.1 998.8 1005.8 999.9 994.1 991.6 987.5 991.1 996.0 1002.7 1005.3 1005.4 987.5 DAY 1 15 24 29 12 26 12 13 4 14 1 9 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 KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.4 -2.8 2.0 10.8 15.6 21.6 25.6 25.0 20.5 12.0 7.3 -1.9 11.0 MINIMUN AIR TEMPERATURE (C) -9.0 -8.9 -3.1 3.6 6.6 11.1 14.0 13.6 9.8 4.6 -0.3 -7.5 2.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 21 21 10 0 0 0 0 0 0 0 3 14 69 DAYS WITH FREEZING MIN.<= 0 27 25 22 1 0 0 0 0 0 0 18 24 117 TEMPERATURE RECORDS LOWEST(C) -22.0 -18.0 -13.6 -1.0 0.4 5.4 11.0 11.4 5.6 1.0 -6.4 -22.2 -22.2 DAY 16 10 16 14 5 1 16 29 28 30 27 29 MAXIMUM AIR TEMPERATURE (C) 1.6 2.5 6.2 15.1 20.2 27.0 31.8 31.5 26.7 17.2 12.8 3.2 16.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 28 27 9 0 0 0 67 DAYS WITH MAXIMUM TEMP. <= 0 13 4 1 0 0 0 0 0 0 0 0 6 24 TEMPERATURE RECORDS HIGHEST(C) 7.2 6.6 10.4 21.4 23.6 30.4 35.8 34.4 31.2 22.5 17.6 10.0 35.8 DAY 20 25 22 27 16 30 11 9 10 13 3 9 DIF. BETWEEN (MAX.-MIN.) (C) 10.6 11.4 9.3 11.5 13.6 15.9 17.8 17.9 16.9 12.6 13.1 10.7 13.4 MEAN DAILY TEMP. (MDT) (C) -3.7 -3.2 1.5 9.4 13.4 19.0 22.9 22.6 18.3 10.9 6.3 -2.1 9.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.6 59.5 49.0 0.6 0.0 0.0 0.0 110.7 HEATING DEG. DAYS(BASE 18 0C) 672.8 593.3 510.7 250.3 143.7 9.4 0.0 0.0 27.7 220.8 352.1 624.1 3405.1 DEWPOINT (MEAN C) -9.7 -10.1 -5.0 -2.7 -4.4 0.2 1.9 1.0 -1.7 0.8 -4.5 -8.2 -3.5 MIXING RATIO (G/KG) 2.64 2.56 3.67 4.23 3.83 5.29 5.91 5.47 4.52 5.39 3.65 3.01 4.18 VAPOUR PRESSURE (HPA) 3.25 3.15 4.49 5.20 4.70 6.49 7.23 6.70 5.57 6.64 4.50 3.70 5.14 SATURATION DEF. (HPA) 1.86 2.13 2.86 8.39 13.67 20.45 27.24 26.71 20.16 8.07 6.22 2.08 11.65 RELATIVE HUMIDITY (MEAN %) 65 61 63 43 29 27 25 23 26 51 47 66 44 RELATIVE HUMIDITY (MAX. %) 80 78 80 64 52 48 46 42 45 76 71 84 64 RELATIVE HUMIDITY (MIN. %) 50 43 47 28 16 16 13 13 15 35 31 47 30 RELATIVE HUMIDITY (MEAN% 03UTC) 70 70 74 60 49 48 46 42 45 74 68 72 60 RELATIVE HUMIDITY (MEAN% 09UTC) 59 53 60 35 18 19 16 16 18 40 35 63 36 RELATIVE HUMIDITY (MEAN% 15UTC) 66 60 59 38 24 21 18 17 22 46 43 61 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 229.6 230.3 406.2 140.4 2.9 1.3 0.0 0.0 0.0 79.0 22.0 581.0 1692.7 DAYS WITH PRECIPITATION >=10 9 6 8 4 0 0 0 0 0 2 1 14 44 DAYS WITH PRECIPITATION >= 5 10 8 11 5 0 0 0 0 0 6 2 16 58 DAYS WITH PRECIPITATION >= 1 16 10 13 9 1 1 0 0 0 8 2 18 78 DAYS WITH PRECIPITATION 16 11 15 9 3 3 0 0 2 8 3 18 88 GREATEST DAILY PRECIPITATION 56.0 67.0 137.0 52.0 2.0 1.0 0.0 0.0 0.0 29.0 13.0 104.0 137.0 DAY 21 27 6 4 17 24 ** ** ** 16 16 12 DAY WITH THUNDER STORM 1 2 8 1 0 1 0 0 1 4 1 9 28 DAYS WITH SNOW OR SLEET 16 9 9 1 0 0 0 0 0 0 3 14 52 DAYS WITH DUST 0 0 1 0 4 2 0 3 3 0 0 3 16 WIND DIRECTION (PREVAILING) 270 225 270 270 315 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 10.1 9.7 10.3 9.1 11.1 8.8 8.6 8.2 5.8 3.9 5.0 8.6 8.0 PREVAILING WIND PERCENT 14.2 12.9 21.9 27.3 22.6 19.3 16.1 14.8 16.7 18.1 18.7 17.4 18.1 CALMS PERCENT OF WIND 69.0 67.9 51.0 44.0 34.2 48.0 57.4 58.1 52.0 65.2 53.3 49.0 54.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 247 246 256 260 284 276 266 233 258 280 269 243 261 VECTOR WIND MAGNITUDE(KNOTS) 2.1 2.2 2.9 3.8 4.6 1.9 1.5 1.5 1.7 1.1 1.5 2.9 2.2 WIND STEADINESES (MEAN %) 75.0 75.9 61.7 74.5 71.9 46.3 38.5 46.9 56.7 73.3 60.0 67.4 59.5 WIND SPEED (MEAN KNOTS) 2.8 2.9 4.7 5.1 6.4 4.1 3.9 3.2 3.0 1.5 2.5 4.3 3.7 FASTEST WIND DIRECTION 240 190 340 220 330 330 240 240 300 320 120 270 270 FASTEST WIND SPEED (KNOTS) 19 27 33 19 27 17 23 16 19 16 17 58 58 DAY 23 4 10 4 18 1 14 7 25 22 5 9 DAYS WITH SKY CLEAR (0-2)/8 14 8 8 12 23 25 31 31 28 18 22 12 232 DAYS WITH P.CLOUDY (3-6)/8 7 11 14 11 8 5 0 0 2 7 5 6 76 DAYS WITH CLOUDY (7-8)/8 10 9 9 7 0 0 0 0 0 6 3 13 57 DAYS WITH VISIBILITY =< 2 KM 1 1 2 0 0 0 0 0 0 0 1 10 15 DURATION OF SUNSHINE HOURS 55.8 129.4 153.5 231.0 319.8 319.4 360.1 341.7 284.5 212.1 198.1 90.7 2696.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 768.1 767.8 767.4 770.8 769.0 769.4 767.7 769.0 772.7 774.1 773.0 768.3 769.8 MAX. QFE PRESSURE IN HPA 775.0 776.7 774.5 775.5 773.4 774.7 771.7 773.6 775.8 778.1 776.5 774.3 778.1 DAY-HOUR 12- 6 15- 9 29- 6 18- 6 9- 6 23- 3 1- 6 23- 6 17- 6 20- 6 2- 6 8- 6 MIN. QFE PRESSURE IN HPA 759.7 760.9 756.2 765.6 763.9 764.7 763.8 765.0 767.9 770.8 768.8 759.0 756.2 DAY-HOUR 26- 3 8- 3 6-12 4-12 23- 3 12- 3 14- 9 12-15 3-12 4-15 8-12 31-15 MEAN QNH PRESSURE IN HPA 1014.1 1013.8 1013.2 1017.4 1015.2 1015.7 1013.6 1015.2 1019.9 1021.6 1020.2 1014.4 1016.2 MAX. QNH PRESSURE IN HPA 1022.7 1024.9 1022.1 1023.4 1020.7 1022.4 1018.6 1021.0 1023.7 1026.6 1024.6 1021.9 1026.6 DAY-HOUR 12- 6 15- 9 29- 6 18- 6 9- 6 23- 3 1- 6 23- 6 17- 6 20- 6 2- 6 8- 6 MIN. QNH PRESSURE IN HPA 1003.6 1005.1 999.2 1011.0 1008.8 1009.8 1008.7 1010.2 1013.8 1017.5 1015.0 1002.7 999.2 DAY-HOUR 26- 3 8- 3 6-12 4-12 23- 3 12- 3 14- 9 12-15 3-12 4-15 8-12 31-15 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 768.0 767.6 767.1 770.7 768.9 769.9 768.4 769.7 773.3 774.2 773.3 768.4 769.9 MAX. QFE PRESSURE IN HPA 773.7 775.2 772.4 774.4 772.7 774.7 771.4 773.1 775.1 777.4 775.6 773.2 777.4 DAY 13 16 29 20 9 23 1 23 17 28 2 8 MIN. QFE PRESSURE IN HPA 759.7 760.9 759.6 765.6 763.9 764.7 764.2 766.2 770.1 770.9 769.8 759.7 759.6 DAY 26 8 7 10 23 12 14 11 4 15 6 22 MEAN QNH PRESSURE IN HPA 1013.9 1013.5 1012.8 1017.3 1015.1 1016.3 1014.4 1016.1 1020.6 1021.8 1020.6 1014.4 1016.4 MAX. QNH PRESSURE IN HPA 1021.1 1023.0 1019.5 1022.0 1019.8 1022.4 1018.2 1020.3 1022.8 1025.7 1023.5 1020.5 1025.7 DAY 13 16 29 20 9 23 1 23 17 28 2 8 MIN. QNH PRESSURE IN HPA 1003.6 1005.1 1003.4 1011.0 1008.8 1009.8 1009.2 1011.7 1016.6 1017.6 1016.2 1003.6 1003.4 DAY 26 8 7 10 23 12 14 11 4 15 6 22 MEAN QFF PRESSURE IN HPA 1018.8 1018.1 1011.9 1009.1 1002.9 999.0 993.6 996.0 1004.7 1012.7 1016.3 1017.3 1008.4 MAX. QFF PRESSURE IN HPA 1033.9 1033.6 1019.6 1014.5 1009.5 1007.0 997.3 1000.6 1012.4 1017.2 1023.1 1034.3 1034.3 DAY 13 15 17 14 25 1 1 31 30 28 27 24 MIN. QFF PRESSURE IN HPA 1007.1 1006.4 1003.4 1001.5 996.0 990.9 988.8 989.5 998.3 1005.2 1006.8 1002.5 988.8 DAY 25 8 6 10 17 12 14 11 4 15 5 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 769.0 768.6 768.1 771.5 769.3 770.1 768.7 770.2 773.8 775.1 774.2 769.4 770.7 MAX. QFE PRESSURE IN HPA 775.0 776.3 774.5 775.5 773.4 774.7 771.7 773.6 775.8 778.1 776.5 774.3 778.1 DAY 12 15 29 18 9 23 1 23 17 20 2 8 MIN. QFE PRESSURE IN HPA 761.0 761.8 758.3 766.6 764.9 764.7 763.9 766.3 770.2 771.2 770.2 761.7 758.3 DAY 26 8 6 5 23 12 14 11 8 15 6 22 MEAN QNH PRESSURE IN HPA 1015.2 1014.7 1014.0 1018.3 1015.6 1016.6 1014.8 1016.7 1021.3 1022.8 1021.7 1015.7 1017.3 MAX. QNH PRESSURE IN HPA 1022.7 1024.4 1022.1 1023.4 1020.7 1022.4 1018.6 1021.0 1023.7 1026.6 1024.6 1021.9 1026.6 DAY 12 15 29 18 9 23 1 23 17 20 2 8 MIN. QNH PRESSURE IN HPA 1005.2 1006.2 1001.8 1012.2 1010.1 1009.8 1008.8 1011.8 1016.7 1018.0 1016.7 1006.1 1001.8 DAY 26 8 6 5 23 12 14 11 8 15 6 22 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 768.4 768.3 767.9 771.1 769.1 769.5 767.8 769.2 772.8 774.2 773.0 768.6 770.0 MAX. QFE PRESSURE IN HPA 773.6 776.7 773.6 775.4 772.8 773.7 770.2 772.3 774.4 777.1 775.3 774.1 777.1 DAY 12 15 29 19 9 22 1 23 17 27 1 8 MIN. QFE PRESSURE IN HPA 761.1 762.1 758.3 766.0 765.5 765.2 763.8 765.9 769.0 771.3 769.4 762.5 758.3 DAY 25 8 6 4 23 12 14 11 3 4 6 22 MEAN QNH PRESSURE IN HPA 1014.4 1014.3 1013.8 1017.9 1015.4 1015.8 1013.7 1015.4 1020.0 1021.7 1020.3 1014.7 1016.4 MAX. QNH PRESSURE IN HPA 1021.0 1024.9 1021.0 1023.2 1020.0 1021.1 1016.7 1019.3 1022.0 1025.4 1023.1 1021.6 1025.4 DAY 12 15 29 19 9 22 1 23 17 27 1 8 MIN. QNH PRESSURE IN HPA 1005.3 1006.6 1001.8 1011.5 1010.8 1010.5 1008.7 1011.3 1015.2 1018.1 1015.7 1007.1 1001.8 DAY 25 8 6 4 23 12 14 11 3 4 6 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 767.4 767.3 766.9 770.3 768.8 768.8 766.9 768.1 771.8 773.4 772.1 767.5 769.1 MAX. QFE PRESSURE IN HPA 773.1 776.0 772.3 774.5 772.0 773.3 769.8 771.0 774.2 776.2 774.6 773.7 776.2 DAY 12 15 18 19 9 22 1 31 29 20 2 8 MIN. QFE PRESSURE IN HPA 760.0 761.2 756.2 765.6 765.5 765.2 763.8 765.2 767.9 771.1 768.8 759.2 756.2 DAY 25 7 6 4 23 12 14 13 3 4 8 25 MEAN QNH PRESSURE IN HPA 1013.3 1013.1 1012.6 1016.9 1014.9 1015.0 1012.6 1014.0 1018.8 1020.7 1019.1 1013.3 1015.4 MAX. QNH PRESSURE IN HPA 1020.3 1024.0 1019.3 1022.1 1019.0 1020.6 1016.2 1017.7 1021.7 1024.2 1022.2 1021.1 1024.2 DAY 12 15 18 19 9 22 1 31 29 20 2 8 MIN. QNH PRESSURE IN HPA 1003.9 1005.4 999.2 1011.0 1010.8 1010.5 1008.7 1010.5 1013.8 1017.8 1015.0 1002.9 999.2 DAY 25 7 6 4 23 12 14 13 3 4 8 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 767.9 767.5 767.2 770.3 768.8 768.8 766.8 767.9 772.0 773.7 772.6 767.9 769.3 MAX. QFE PRESSURE IN HPA 773.5 776.0 772.3 775.0 772.3 773.3 769.6 771.4 775.2 776.6 775.1 773.8 776.6 DAY 12 15 18 19 2 22 1 31 29 20 2 8 MIN. QFE PRESSURE IN HPA 760.0 761.2 758.7 766.0 765.6 765.4 764.2 765.0 768.0 770.8 769.7 759.0 758.7 DAY 25 7 6 4 23 11 14 12 3 4 8 31 MEAN QNH PRESSURE IN HPA 1013.9 1013.4 1012.9 1016.8 1014.9 1015.0 1012.5 1013.9 1019.0 1021.1 1019.7 1013.8 1015.6 MAX. QNH PRESSURE IN HPA 1020.8 1024.0 1019.3 1022.7 1019.3 1020.6 1016.0 1018.2 1023.0 1024.7 1022.8 1021.2 1024.7 DAY 12 15 18 19 2 22 1 31 29 20 2 8 MIN. QNH PRESSURE IN HPA 1003.9 1005.4 1002.3 1011.5 1011.0 1010.7 1009.2 1010.2 1014.0 1017.5 1016.1 1002.7 1002.3 DAY 25 7 6 4 23 11 14 12 3 4 8 31 MEAN QFF PRESSURE IN HPA 1018.6 1017.9 1012.0 1008.3 1002.9 997.6 991.7 993.8 1003.3 1012.0 1015.5 1016.7 1007.5 MAX. QFF PRESSURE IN HPA 1032.8 1034.7 1021.6 1013.4 1007.7 1005.2 997.0 999.3 1013.1 1017.5 1020.9 1036.4 1036.4 DAY 12 15 8 14 8 1 2 30 29 22 27 23 MIN. QFF PRESSURE IN HPA 1006.3 1006.8 1001.3 1003.0 998.8 992.5 988.7 989.8 996.1 1008.1 1006.7 1000.7 988.7 DAY 25 7 6 28 16 12 8 11 3 14 5 31 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 KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -8.0 -5.5 -4.1 4.1 11.7 18.2 23.1 21.3 16.8 11.3 5.3 -2.5 7.6 MINIMUN AIR TEMPERATURE (C) -14.7 -10.7 -9.9 -1.3 5.9 10.4 14.5 13.1 8.9 2.3 0.2 -6.6 1.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 28 24 23 8 0 0 0 0 0 0 4 21 108 DAYS WITH FREEZING MIN.<= 0 31 29 30 16 0 0 0 0 0 4 13 29 152 TEMPERATURE RECORDS LOWEST(C) -30.6 -25.0 -21.6 -11.6 1.0 6.2 11.0 8.6 4.6 -1.8 -11.6 -18.6 -30.6 DAY 29 12 1 2 14 21 12 31 30 29 27 24 MAXIMUM AIR TEMPERATURE (C) -2.3 0.8 2.0 9.1 16.3 24.2 30.0 28.3 23.6 19.4 10.7 2.1 13.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 1 20 9 0 0 0 0 30 DAYS WITH MAXIMUM TEMP. <= 0 19 11 9 0 0 0 0 0 0 0 1 6 46 TEMPERATURE RECORDS HIGHEST(C) 3.5 7.2 8.0 12.5 24.0 30.4 32.2 32.4 26.0 23.2 17.0 6.4 32.4 DAY 21 22 30 30 30 30 7 5 2 3 19 3 DIF. BETWEEN (MAX.-MIN.) (C) 12.4 11.5 11.9 10.4 10.4 13.8 15.5 15.2 14.7 17.1 10.5 8.7 12.7 MEAN DAILY TEMP. (MDT) (C) -8.5 -4.9 -3.9 3.9 11.1 17.3 22.3 20.7 16.2 10.9 5.4 -2.3 7.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.3 45.4 20.7 0.0 0.0 0.0 0.0 67.4 HEATING DEG. DAYS(BASE 18 0C) 821.0 665.4 679.8 422.7 213.7 34.8 0.0 4.5 54.3 221.5 377.1 627.8 4122.6 DEWPOINT (MEAN C) -13.9 -11.1 -9.1 -3.8 0.4 0.6 2.4 3.7 -2.5 -4.7 -3.8 -8.4 -4.2 MIXING RATIO (G/KG) 1.94 2.40 2.74 3.92 5.28 5.34 6.06 6.62 4.24 3.61 4.05 2.89 4.09 VAPOUR PRESSURE (HPA) 2.37 2.94 3.35 4.82 6.48 6.55 7.42 8.11 5.23 4.45 5.00 3.55 5.02 SATURATION DEF. (HPA) 1.36 1.44 1.49 3.75 7.74 15.16 21.86 18.31 14.74 9.79 4.33 1.76 8.48 RELATIVE HUMIDITY (MEAN %) 65 68 70 58 49 33 28 34 29 36 57 67 50 RELATIVE HUMIDITY (MAX. %) 81 85 88 76 70 53 47 53 48 59 81 86 69 RELATIVE HUMIDITY (MIN. %) 49 50 50 42 32 21 17 21 17 19 36 47 33 RELATIVE HUMIDITY (MEAN% 03UTC) 72 74 80 68 61 49 45 52 44 57 71 74 62 RELATIVE HUMIDITY (MEAN% 09UTC) 65 60 58 48 42 26 19 23 19 23 48 60 41 RELATIVE HUMIDITY (MEAN% 15UTC) 61 65 66 54 45 27 20 26 26 24 50 62 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 204.7 299.7 268.7 184.4 108.0 4.2 0.0 0.0 0.0 0.0 197.3 300.8 1567.8 DAYS WITH PRECIPITATION >=10 6 7 9 6 3 0 0 0 0 0 4 9 44 DAYS WITH PRECIPITATION >= 5 10 10 10 8 3 0 0 0 0 0 12 12 65 DAYS WITH PRECIPITATION >= 1 14 19 15 13 11 2 0 0 0 0 12 13 99 DAYS WITH PRECIPITATION 15 20 16 15 15 3 0 0 2 1 13 18 118 GREATEST DAILY PRECIPITATION 33.0 92.0 64.0 41.0 58.0 2.0 0.0 0.0 0.0 0.0 57.0 53.0 92.0 DAY 31 24 15 24 6 4 ** ** ** ** 25 15 DAY WITH THUNDER STORM 1 1 2 9 6 0 0 0 0 1 3 2 25 DAYS WITH SNOW OR SLEET 14 20 15 6 0 0 0 0 0 0 6 17 78 DAYS WITH DUST 1 0 0 2 5 4 0 0 0 0 0 0 12 WIND DIRECTION (PREVAILING) 270 270 225 270 270 270 270 270 270 270 270 225 270 PREVAILING WIND SPEED(KNOTS) 8.3 7.2 8.8 7.4 6.8 7.1 7.9 6.7 6.3 7.3 6.7 8.3 7.2 PREVAILING WIND PERCENT 13.5 15.8 14.5 27.1 29.0 28.3 24.2 13.3 12.1 20.2 13.8 13.3 18.7 CALMS PERCENT OF WIND 58.1 51.8 60.5 44.2 35.5 37.9 53.6 56.5 59.6 65.3 65.0 68.5 54.7 NO. OF WIND OBSERVATION 155 222 248 240 248 240 248 248 240 248 240 248 2825 VECTOR WIND DIRECTION (MEAN) 236 238 253 252 258 262 263 242 285 265 247 253 255 VECTOR WIND MAGNITUDE(KNOTS) 1.8 2.1 2.1 3.0 3.0 2.9 2.4 1.0 1.2 2.0 1.7 2.1 2.1 WIND STEADINESES (MEAN %) 56.2 58.3 75.0 75.0 66.7 69.0 72.7 37.0 50.0 83.3 68.0 84.0 65.6 WIND SPEED (MEAN KNOTS) 3.2 3.6 2.8 4.0 4.5 4.2 3.3 2.7 2.4 2.4 2.5 2.5 3.2 FASTEST WIND DIRECTION 120 330 200 270 320 330 280 300 340 280 190 230 190 FASTEST WIND SPEED (KNOTS) 27 25 23 21 25 16 14 19 23 14 29 19 29 DAY 16 15 30 18 4 5 5 11 25 2 25 18 DAYS WITH SKY CLEAR (0-2)/8 17 12 15 11 12 24 23 27 28 31 12 12 224 DAYS WITH P.CLOUDY (3-6)/8 9 11 10 14 12 5 8 4 2 0 11 9 95 DAYS WITH CLOUDY (7-8)/8 5 6 6 5 7 1 0 0 0 0 7 10 47 DAYS WITH VISIBILITY =< 2 KM 9 11 10 1 0 0 0 0 0 0 2 9 42 DURATION OF SUNSHINE HOURS 128.6 135.3 187.9 208.6 230.7 315.4 335.3 323.7 284.8 276.5 150.8 117.2 2694.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 766.5 765.4 766.8 768.5 770.3 769.3 768.8 770.1 773.0 773.1 773.0 768.7 769.5 MAX. QFE PRESSURE IN HPA 776.0 772.0 774.0 774.1 775.8 775.5 773.1 774.5 776.4 777.7 779.2 775.4 779.2 DAY-HOUR 10- 6 16- 9 13- 6 21- 6 29- 6 11- 6 6- 6 16- 6 2- 6 30- 6 4- 6 1- 6 MIN. QFE PRESSURE IN HPA 754.0 755.6 757.7 761.6 764.9 764.3 764.4 765.3 768.9 768.2 764.3 763.6 754.0 DAY-HOUR 30-15 25- 0 31- 0 18- 0 4- 0 27-12 18-15 1-15 5-12 7-12 26- 0 27-21 MEAN QNH PRESSURE IN HPA 1012.1 1010.7 1012.5 1014.6 1016.9 1015.6 1015.0 1016.6 1020.2 1020.3 1020.2 1014.9 1015.8 MAX. QNH PRESSURE IN HPA 1024.0 1019.0 1021.5 1021.6 1023.7 1023.4 1020.3 1022.1 1024.5 1026.1 1028.0 1023.2 1028.0 DAY-HOUR 10- 6 16- 9 13- 6 21- 6 29- 6 11- 6 6- 6 16- 6 2- 6 30- 6 4- 6 1- 6 MIN. QNH PRESSURE IN HPA 996.4 998.4 1001.1 1005.9 1010.1 1009.3 1009.4 1010.6 1015.1 1014.2 1009.3 1008.4 996.4 DAY-HOUR 30-15 25- 0 31- 0 18- 0 4- 0 27-12 18-15 1-15 5-12 7-12 26- 0 27-21 MEAN QFF PRESSURE IN HPA ****** 1016.1 1016.4 1010.1 1005.1 997.9 993.0 996.0 1004.0 1009.2 1014.6 1017.1 ****** MAX. QFF PRESSURE IN HPA ****** 1033.4 1033.1 1020.4 1014.3 1008.5 998.9 1006.9 1010.0 1020.6 1022.3 1034.5 ****** DAY-HOUR **-** 16-18 13- 3 12- 3 14- 3 7-12 16- 3 31- 3 22- 3 30- 3 18- 3 11- 3 MIN. QFF PRESSURE IN HPA ****** 992.8 996.3 999.6 998.2 988.6 985.6 987.5 998.4 1000.6 1005.1 1005.7 ****** DAY-HOUR **-** 25- 0 30-18 18- 0 4- 0 28- 9 18-21 1-12 17- 9 7- 9 25-21 4- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** 765.1 766.3 767.8 769.8 769.0 768.8 770.0 772.8 772.9 772.7 768.5 ****** MAX. QFE PRESSURE IN HPA ****** 770.4 772.5 772.6 774.1 773.9 772.0 773.6 775.5 776.8 777.3 774.0 ****** DAY ** 16 13 21 29 11 6 16 22 30 4 1 MIN. QFE PRESSURE IN HPA ****** 755.6 757.7 761.6 764.9 765.3 764.9 765.9 770.0 769.1 764.3 764.7 ****** DAY ** 25 31 18 4 28 19 19 6 7 26 20 MEAN QNH PRESSURE IN HPA ****** 1010.3 1011.9 1013.8 1016.2 1015.2 1015.0 1016.5 1020.0 1020.1 1019.8 1014.6 ****** MAX. QNH PRESSURE IN HPA ****** 1017.0 1019.6 1019.7 1021.6 1021.3 1019.0 1021.0 1023.4 1025.0 1025.6 1021.5 ****** DAY ** 16 13 21 29 11 6 16 22 30 4 1 MIN. QNH PRESSURE IN HPA ****** 998.4 1001.1 1005.9 1010.1 1010.6 1010.1 1011.3 1016.5 1015.3 1009.3 1009.8 ****** DAY ** 25 31 18 4 28 19 19 6 7 26 20 MEAN QFF PRESSURE IN HPA ****** 1014.8 1015.4 1009.3 1004.6 997.8 993.0 995.6 1003.7 1008.4 1013.7 1016.4 ****** MAX. QFF PRESSURE IN HPA ****** 1028.2 1028.0 1018.8 1013.2 1005.1 996.6 1004.8 1007.5 1015.8 1019.1 1030.2 ****** DAY ** 13 13 12 14 11 6 31 22 30 27 11 MIN. QFF PRESSURE IN HPA ****** 992.8 998.2 999.6 998.2 990.8 987.5 989.2 999.1 1002.5 1006.7 1005.7 ****** DAY ** 25 31 18 4 28 19 1 18 7 22 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 766.4 765.2 766.6 768.2 770.1 769.4 769.3 770.6 773.2 773.4 773.0 768.5 769.5 MAX. QFE PRESSURE IN HPA 775.1 771.3 773.1 773.2 775.0 774.6 772.7 774.2 775.9 777.1 777.9 774.2 777.9 DAY 10 16 13 21 29 11 6 16 2 30 4 1 MIN. QFE PRESSURE IN HPA 760.5 756.8 757.8 762.0 765.2 765.5 765.1 766.7 770.6 769.4 764.8 764.5 756.8 DAY 25 25 31 18 4 28 19 19 18 7 26 22 MEAN QNH PRESSURE IN HPA 1011.9 1010.4 1012.2 1014.3 1016.6 1015.7 1015.6 1017.2 1020.5 1020.7 1020.2 1014.6 1015.8 MAX. QNH PRESSURE IN HPA 1022.8 1018.1 1020.3 1020.5 1022.7 1022.2 1019.8 1021.7 1023.9 1025.4 1026.4 1021.7 1026.4 DAY 10 16 13 21 29 11 6 16 2 30 4 1 MIN. QNH PRESSURE IN HPA 1004.6 999.9 1001.2 1006.4 1010.5 1010.8 1010.3 1012.3 1017.2 1015.7 1009.9 1009.6 999.9 DAY 25 25 31 18 4 28 19 19 18 7 26 22 MEAN QFF PRESSURE IN HPA 1021.8 1016.8 1017.7 1011.0 1005.8 999.3 995.4 998.5 1006.4 1012.1 1015.6 1017.3 1009.8 MAX. QFF PRESSURE IN HPA 1044.3 1031.9 1033.1 1020.4 1014.3 1006.3 998.9 1006.9 1010.0 1020.6 1022.3 1034.5 1044.3 DAY 10 13 13 12 14 7 16 31 22 30 18 11 MIN. QFF PRESSURE IN HPA 1006.4 995.7 997.7 999.7 999.2 992.7 989.4 992.7 1003.1 1006.2 1007.9 1008.1 989.4 DAY 31 25 31 18 4 28 19 1 26 7 22 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 767.5 766.1 767.7 769.2 770.8 769.7 769.7 771.1 773.9 774.3 774.0 769.5 770.3 MAX. QFE PRESSURE IN HPA 776.0 771.9 774.0 774.1 775.8 775.5 773.1 774.5 776.4 777.7 779.2 775.4 779.2 DAY 10 16 13 21 29 11 6 16 2 30 4 1 MIN. QFE PRESSURE IN HPA 761.1 760.2 760.1 762.9 766.0 765.6 765.4 767.1 770.8 769.6 766.0 764.1 760.1 DAY 25 11 31 18 4 27 19 1 17 7 26 30 MEAN QNH PRESSURE IN HPA 1013.3 1011.5 1013.5 1015.4 1017.4 1016.1 1016.1 1017.8 1021.3 1021.8 1021.5 1015.8 1016.8 MAX. QNH PRESSURE IN HPA 1024.0 1018.8 1021.5 1021.6 1023.7 1023.4 1020.3 1022.1 1024.5 1026.1 1028.0 1023.2 1028.0 DAY 10 16 13 21 29 11 6 16 2 30 4 1 MIN. QNH PRESSURE IN HPA 1005.3 1004.2 1004.1 1007.6 1011.5 1011.0 1010.7 1012.8 1017.5 1016.0 1011.5 1009.1 1004.1 DAY 25 11 31 18 4 27 19 1 17 7 26 30 MEAN QFF PRESSURE IN HPA ****** 1017.7 1017.7 1010.9 1005.3 997.9 993.5 996.9 1004.5 1010.4 1016.5 1018.4 ****** MAX. QFF PRESSURE IN HPA ****** 1032.8 1031.1 1019.1 1012.3 1006.2 996.9 1006.3 1007.9 1018.4 1022.1 1034.4 ****** DAY ** 16 13 12 6 7 6 31 1 30 18 11 MIN. QFF PRESSURE IN HPA ****** 1001.6 999.2 1001.4 1001.1 990.6 987.3 989.8 999.1 1002.5 1007.9 1009.3 ****** DAY ** 25 31 18 4 28 19 1 17 7 22 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 766.7 765.7 767.5 768.9 770.7 769.4 769.1 770.2 773.0 773.0 773.0 768.8 769.7 MAX. QFE PRESSURE IN HPA 775.4 772.0 773.4 773.2 775.2 775.1 772.6 773.3 775.5 776.4 777.5 774.0 777.5 DAY 10 16 12 13 29 7 6 16 2 29 4 1 MIN. QFE PRESSURE IN HPA 760.0 759.9 761.6 763.4 766.1 765.3 765.1 766.2 770.0 768.9 765.4 764.3 759.9 DAY 30 24 31 18 4 27 19 1 6 7 26 30 MEAN QNH PRESSURE IN HPA 1012.4 1011.1 1013.3 1015.1 1017.3 1015.8 1015.3 1016.7 1020.3 1020.2 1020.3 1015.0 1016.1 MAX. QNH PRESSURE IN HPA 1023.2 1019.0 1020.7 1020.5 1023.0 1022.8 1019.7 1020.6 1023.4 1024.5 1025.9 1021.5 1025.9 DAY 10 16 12 13 29 7 6 16 2 29 4 1 MIN. QNH PRESSURE IN HPA 1003.9 1003.8 1005.9 1008.2 1011.6 1010.6 1010.3 1011.7 1016.5 1015.1 1010.7 1009.3 1003.8 DAY 30 24 31 18 4 27 19 1 6 7 26 30 MEAN QFF PRESSURE IN HPA ****** 1015.4 1016.1 1009.7 1005.0 997.3 991.8 994.8 1002.7 1007.1 1013.7 1016.5 ****** MAX. QFF PRESSURE IN HPA ****** 1028.7 1028.8 1018.7 1011.0 1008.2 995.3 1004.2 1007.4 1014.2 1018.6 1029.9 ****** DAY ** 16 12 12 14 7 12 31 21 29 24 11 MIN. QFF PRESSURE IN HPA ****** 1000.7 1001.7 1001.0 1000.1 988.6 985.6 988.1 998.4 1000.6 1005.9 1009.8 ****** DAY ** 24 31 27 4 28 19 1 17 7 22 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 765.9 764.7 766.4 768.3 770.1 768.9 768.2 769.2 772.1 772.0 772.2 768.1 768.8 MAX. QFE PRESSURE IN HPA 774.1 770.6 772.7 772.6 774.2 774.1 772.2 772.2 775.0 775.7 775.9 773.1 775.9 DAY 10 16 12 21 29 7 6 31 21 30 4 11 MIN. QFE PRESSURE IN HPA 756.8 757.0 761.4 763.3 765.5 764.3 764.9 765.4 768.9 768.2 766.0 764.0 756.8 DAY 30 24 31 18 4 27 19 1 5 7 26 21 MEAN QNH PRESSURE IN HPA 1011.3 1009.8 1012.0 1014.3 1016.6 1015.1 1014.2 1015.4 1019.1 1019.0 1019.2 1014.1 1015.0 MAX. QNH PRESSURE IN HPA 1021.6 1017.2 1019.8 1019.7 1021.7 1021.6 1019.2 1019.2 1022.7 1023.6 1023.9 1020.3 1023.9 DAY 10 16 12 21 29 7 6 31 21 30 4 11 MIN. QNH PRESSURE IN HPA 999.9 1000.2 1005.7 1008.1 1010.8 1009.3 1010.1 1010.7 1015.1 1014.2 1011.5 1008.9 999.9 DAY 30 24 31 18 4 27 19 1 5 7 26 21 MEAN QFF PRESSURE IN HPA ****** 1014.4 1015.3 1009.7 1004.8 997.5 992.2 994.5 1002.7 1007.4 1013.1 1016.0 ****** MAX. QFF PRESSURE IN HPA ****** 1026.8 1028.1 1017.9 1011.9 1008.5 997.2 1003.4 1007.4 1015.1 1016.7 1028.4 ****** DAY ** 16 12 12 14 7 6 31 21 30 18 11 MIN. QFF PRESSURE IN HPA ****** 996.2 1002.7 1002.2 999.3 989.9 987.7 987.5 998.7 1002.3 1005.6 1006.7 ****** DAY ** 24 31 23 4 27 18 1 5 6 22 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 766.2 765.1 766.5 768.2 769.9 769.0 768.0 769.1 772.3 772.5 772.6 768.7 769.0 MAX. QFE PRESSURE IN HPA 774.5 770.4 772.7 772.4 774.0 773.1 772.0 772.2 775.4 776.0 775.7 773.5 776.0 DAY 9 16 12 21 29 2 6 31 21 30 3 11 MIN. QFE PRESSURE IN HPA 754.0 758.9 761.5 762.8 765.8 764.5 764.4 765.3 769.4 768.3 766.3 764.0 754.0 DAY 30 24 30 18 4 27 18 1 5 7 25 21 MEAN QNH PRESSURE IN HPA 1011.7 1010.4 1012.1 1014.2 1016.4 1015.2 1013.9 1015.3 1019.3 1019.5 1019.7 1014.8 1015.2 MAX. QNH PRESSURE IN HPA 1022.1 1017.0 1019.8 1019.5 1021.5 1020.3 1019.0 1019.2 1023.2 1024.0 1023.6 1020.8 1024.0 DAY 9 16 12 21 29 2 6 31 21 30 3 11 MIN. QNH PRESSURE IN HPA 996.4 1002.6 1005.8 1007.4 1011.2 1009.6 1009.4 1010.6 1015.7 1014.3 1011.8 1008.9 996.4 DAY 30 24 30 18 4 27 18 1 5 7 25 21 MEAN QFF PRESSURE IN HPA 1021.6 1016.7 1017.3 1010.7 1005.3 998.7 993.8 996.5 1005.1 1011.0 1015.2 1017.6 1009.1 MAX. QFF PRESSURE IN HPA 1042.3 1032.7 1032.4 1019.2 1012.0 1007.7 998.0 1005.2 1009.2 1019.2 1020.0 1032.2 1042.3 DAY 9 16 12 12 14 7 12 31 21 30 18 11 MIN. QFF PRESSURE IN HPA 996.0 999.7 1002.4 1002.9 1000.6 992.1 988.9 990.6 1001.1 1005.1 1007.1 1005.7 988.9 DAY 30 24 30 27 9 27 18 1 8 6 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** 765.7 767.0 768.9 770.7 769.5 768.7 770.2 773.2 773.3 773.2 769.1 ****** MAX. QFE PRESSURE IN HPA ****** 771.1 773.3 773.3 774.4 773.7 772.1 773.8 775.9 776.6 777.0 774.2 ****** DAY ** 16 12 12 29 10 6 31 21 29 3 11 MIN. QFE PRESSURE IN HPA ****** 759.4 759.6 763.8 766.5 765.4 764.6 766.4 770.1 769.4 765.8 764.5 ****** DAY ** 10 30 18 9 27 18 1 6 6 25 21 MEAN QNH PRESSURE IN HPA ****** 1011.1 1012.7 1015.1 1017.3 1015.8 1014.8 1016.8 1020.4 1020.6 1020.4 1015.3 ****** MAX. QNH PRESSURE IN HPA ****** 1017.8 1020.6 1020.6 1022.0 1021.1 1019.1 1021.2 1023.9 1024.7 1025.2 1021.7 ****** DAY ** 16 12 12 29 10 6 31 21 29 3 11 MIN. QNH PRESSURE IN HPA ****** 1003.2 1003.4 1008.7 1012.1 1010.7 1009.7 1012.0 1016.6 1015.7 1011.2 1009.6 ****** DAY ** 10 30 18 9 27 18 1 6 6 25 21 MEAN QFF PRESSURE IN HPA ****** 1017.3 1016.6 1010.5 1005.1 997.7 992.4 996.1 1003.7 1009.3 1015.5 1017.8 ****** MAX. QFF PRESSURE IN HPA ****** 1033.4 1031.1 1019.6 1011.5 1005.0 996.2 1005.3 1006.9 1017.5 1020.0 1031.7 ****** DAY ** 16 12 12 13 7 15 31 1 29 17 11 MIN. QFF PRESSURE IN HPA ****** 999.9 996.3 1003.4 999.0 990.8 986.7 989.1 999.6 1001.8 1007.4 1007.5 ****** DAY ** 24 30 17 9 27 18 1 6 5 25 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** 765.7 766.8 768.8 770.6 769.5 769.0 770.5 773.3 773.4 773.1 768.8 ****** MAX. QFE PRESSURE IN HPA ****** 770.5 773.2 773.3 774.6 774.1 772.3 773.8 775.9 776.9 777.3 773.8 ****** DAY ** 16 12 12 29 10 6 31 21 29 3 11 MIN. QFE PRESSURE IN HPA ****** 760.2 758.3 763.6 766.4 765.4 764.9 766.4 770.5 769.4 764.6 763.6 ****** DAY ** 10 30 17 6 27 18 18 5 6 25 27 MEAN QNH PRESSURE IN HPA ****** 1011.1 1012.5 1014.9 1017.2 1015.8 1015.3 1017.2 1020.6 1020.8 1020.4 1014.9 ****** MAX. QNH PRESSURE IN HPA ****** 1017.1 1020.5 1020.6 1022.2 1021.6 1019.3 1021.2 1023.9 1025.1 1025.6 1021.2 ****** DAY ** 16 12 12 29 10 6 31 21 29 3 11 MIN. QNH PRESSURE IN HPA ****** 1004.2 1001.8 1008.4 1012.0 1010.7 1010.1 1012.0 1017.1 1015.7 1009.7 1008.4 ****** DAY ** 10 30 17 6 27 18 18 5 6 25 27 MEAN QFF PRESSURE IN HPA ****** 1015.5 1015.0 1009.4 1004.8 997.4 991.8 995.3 1003.1 1007.8 1013.9 1016.6 ****** MAX. QFF PRESSURE IN HPA ****** 1029.7 1029.9 1018.7 1012.3 1006.1 995.8 1004.4 1006.5 1015.4 1019.3 1029.5 ****** DAY ** 12 12 11 13 7 11 31 1 29 30 24 MIN. QFF PRESSURE IN HPA ****** 1002.1 997.6 1000.7 1000.4 989.4 985.6 988.9 999.0 1001.7 1005.1 1008.5 ****** DAY ** 24 30 26 17 27 18 1 17 6 25 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -7.0 -3.6 -0.3 5.1 12.2 19.2 22.2 21.9 19.0 11.5 5.3 3.2 9.1 MINIMUN AIR TEMPERATURE (C) -12.6 -8.4 -4.5 1.0 6.3 10.2 14.0 13.9 10.2 4.2 0.7 -2.2 2.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 24 18 17 3 0 0 0 0 0 0 2 10 74 DAYS WITH FREEZING MIN.<= 0 30 28 23 8 1 0 0 0 0 0 14 22 126 TEMPERATURE RECORDS LOWEST(C) -25.0 -21.6 -14.6 -5.2 0.0 5.0 10.7 11.6 5.0 1.4 -9.4 -8.6 -25.0 DAY 16 10 24 5 1 5 14 12 30 9 30 17 MAXIMUM AIR TEMPERATURE (C) -0.8 1.6 4.5 9.3 17.4 25.8 28.7 28.5 26.3 17.8 10.8 9.3 14.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 3 6 0 0 0 0 9 DAYS WITH MAXIMUM TEMP. <= 0 17 9 3 0 0 0 0 0 0 0 0 0 29 TEMPERATURE RECORDS HIGHEST(C) 7.0 8.2 8.4 14.6 24.0 29.8 31.0 31.0 29.2 22.0 15.8 14.0 31.0 DAY 8 28 30 20 27 30 15 15 1 1 8 31 DIF. BETWEEN (MAX.-MIN.) (C) 11.8 10.0 9.0 8.3 11.1 15.6 14.7 14.6 16.1 13.6 10.1 11.5 12.2 MEAN DAILY TEMP. (MDT) (C) -6.7 -3.4 0.0 5.1 11.9 18.0 21.3 21.2 18.2 11.0 5.8 3.6 8.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.5 19.6 12.4 0.0 0.0 0.0 0.0 32.5 HEATING DEG. DAYS(BASE 18 0C) 765.9 598.7 557.0 386.0 190.3 23.8 0.0 0.0 18.9 216.8 367.1 447.7 3572.4 DEWPOINT (MEAN C) -12.8 -9.1 -7.5 -2.8 1.2 -1.9 1.7 1.7 -2.2 -3.6 -3.9 -6.3 -3.8 MIXING RATIO (G/KG) 2.12 2.80 3.00 4.17 5.52 4.51 5.80 5.80 4.33 3.91 3.93 3.23 4.09 VAPOUR PRESSURE (HPA) 2.61 3.44 3.68 5.12 6.78 5.54 7.11 7.11 5.34 4.84 4.84 3.99 5.03 SATURATION DEF. (HPA) 1.44 1.62 2.58 3.89 8.08 17.67 20.53 20.04 17.59 9.28 4.46 4.04 9.27 RELATIVE HUMIDITY (MEAN %) 67 68 61 60 49 27 28 28 26 38 55 54 47 RELATIVE HUMIDITY (MAX. %) 84 84 81 78 72 45 47 47 44 59 76 78 66 RELATIVE HUMIDITY (MIN. %) 47 50 43 43 34 15 17 17 14 23 36 33 31 RELATIVE HUMIDITY (MEAN% 03UTC) 75 75 71 68 65 45 47 44 44 56 66 65 60 RELATIVE HUMIDITY (MEAN% 09UTC) 62 57 53 51 41 18 19 22 15 29 44 43 38 RELATIVE HUMIDITY (MEAN% 15UTC) 65 63 58 56 44 19 21 20 19 31 46 47 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 327.9 437.1 544.5 267.0 109.9 0.0 0.0 0.0 0.0 19.9 290.7 43.0 2040.0 DAYS WITH PRECIPITATION >=10 6 11 10 8 3 0 0 0 0 1 9 1 49 DAYS WITH PRECIPITATION >= 5 7 12 12 9 5 0 0 0 0 1 12 2 60 DAYS WITH PRECIPITATION >= 1 10 17 16 13 8 0 0 0 0 4 13 4 85 DAYS WITH PRECIPITATION 11 18 19 14 9 0 0 0 0 5 14 6 96 GREATEST DAILY PRECIPITATION 145.0 123.0 124.0 63.0 35.5 0.0 0.0 0.0 0.0 13.0 66.0 29.2 145.0 DAY 8 21 8 26 13 ** ** ** ** 28 12 15 DAY WITH THUNDER STORM 3 5 6 8 2 0 0 0 0 0 9 2 35 DAYS WITH SNOW OR SLEET 12 17 19 4 0 0 0 0 0 0 7 4 63 DAYS WITH DUST 1 0 0 0 3 1 0 0 0 0 0 0 5 WIND DIRECTION (PREVAILING) 225 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.4 10.2 10.3 9.9 8.7 8.4 8.4 7.5 7.8 6.9 9.9 7.1 8.9 PREVAILING WIND PERCENT 10.1 13.4 13.7 23.4 27.0 23.3 11.7 12.5 16.3 11.7 17.1 9.7 15.7 CALMS PERCENT OF WIND 77.0 62.9 58.1 54.0 51.2 58.8 70.6 74.2 72.5 76.5 60.8 73.0 65.9 NO. OF WIND OBSERVATION 248 224 248 239 248 240 248 248 240 247 240 248 2918 VECTOR WIND DIRECTION (MEAN) 254 247 256 257 262 271 253 253 261 261 253 269 258 VECTOR WIND MAGNITUDE(KNOTS) 1.8 2.7 3.2 3.2 3.2 3.0 1.1 1.3 1.7 0.9 2.6 1.4 2.2 WIND STEADINESES (MEAN %) 78.3 75.0 71.1 78.0 76.2 85.7 44.0 68.4 77.3 52.9 70.3 66.7 73.3 WIND SPEED (MEAN KNOTS) 2.3 3.6 4.5 4.1 4.2 3.5 2.5 1.9 2.2 1.7 3.7 2.1 3.0 FASTEST WIND DIRECTION 270 180 270 210 180 300 270 220 340 330 270 250 180 FASTEST WIND SPEED (KNOTS) 27 54 39 25 29 19 19 14 17 14 25 23 54 DAY 8 11 19 21 6 4 25 11 25 4 12 15 DAYS WITH SKY CLEAR (0-2)/8 19 10 11 11 12 30 24 27 30 21 13 18 226 DAYS WITH P.CLOUDY (3-6)/8 6 7 7 12 11 0 7 4 0 9 10 9 82 DAYS WITH CLOUDY (7-8)/8 6 11 13 7 8 0 0 0 0 1 7 4 57 DAYS WITH VISIBILITY =< 2 KM 9 13 10 1 0 0 0 0 0 0 1 1 35 DURATION OF SUNSHINE HOURS 141.5 116.3 148.2 254.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 768.2 767.9 768.0 770.1 771.1 770.0 769.5 771.0 772.0 774.8 771.4 772.4 770.5 MAX. QFE PRESSURE IN HPA 775.4 773.0 776.4 777.7 775.2 774.9 774.1 775.5 776.7 780.1 776.8 778.6 780.1 DAY-HOUR 27- 6 8- 6 31- 6 18- 6 27- 6 23- 6 28- 6 31- 6 23- 6 17- 6 21- 6 26- 6 MIN. QFE PRESSURE IN HPA 759.7 760.7 760.4 764.8 765.5 766.1 764.7 765.6 768.5 770.7 765.3 765.7 759.7 DAY-HOUR 8- 9 3-12 12- 0 27- 0 6- 3 25-15 9-15 12-12 28-12 28-15 14- 0 4-12 MEAN QNH PRESSURE IN HPA 1014.2 1013.9 1013.9 1016.5 1017.9 1016.5 1015.8 1017.7 1019.0 1022.5 1018.2 1019.4 1017.1 MAX. QNH PRESSURE IN HPA 1023.2 1020.2 1024.5 1026.1 1023.0 1022.6 1021.6 1023.4 1024.9 1029.1 1025.0 1027.2 1029.1 DAY-HOUR 27- 6 8- 6 31- 6 18- 6 27- 6 23- 6 28- 6 31- 6 23- 6 17- 6 21- 6 26- 6 MIN. QNH PRESSURE IN HPA 1003.6 1004.8 1004.4 1009.9 1010.8 1011.6 1009.8 1011.0 1014.6 1017.3 1010.6 1011.1 1003.6 DAY-HOUR 8- 9 3-12 12- 0 27- 0 6- 3 25-15 9-15 12-12 28-12 28-15 14- 0 4-12 MEAN QFF PRESSURE IN HPA 1021.3 1017.3 1013.8 1011.0 1005.6 998.1 994.5 996.9 1000.9 1011.2 1012.5 1016.0 1008.3 MAX. QFF PRESSURE IN HPA 1034.9 1035.5 1025.1 1022.9 1012.7 1004.7 1002.2 1004.1 1008.9 1018.3 1023.7 1025.7 1035.5 DAY-HOUR 27- 6 10- 6 31- 3 1- 3 3- 9 22- 3 28- 3 31- 3 24- 3 17- 3 30- 3 26- 6 MIN. QFF PRESSURE IN HPA 999.0 1000.9 1002.1 1000.6 997.0 991.9 987.1 988.0 993.9 1002.3 1001.9 1006.5 987.1 DAY-HOUR 8- 9 3- 3 8-12 20-21 31-21 15- 9 11-21 21- 9 3- 9 5-21 10-21 4-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 767.9 767.6 767.5 769.3 770.5 769.7 769.4 770.8 772.0 774.6 771.1 772.2 770.2 MAX. QFE PRESSURE IN HPA 774.3 772.0 775.8 775.9 773.5 774.2 773.2 774.5 775.1 778.6 776.1 777.8 778.6 DAY 27 8 31 17 27 23 28 31 24 18 21 27 MIN. QFE PRESSURE IN HPA 761.4 761.0 760.4 764.8 766.0 766.3 765.4 766.9 769.0 771.5 765.3 766.5 760.4 DAY 9 5 12 27 6 4 12 13 29 6 14 5 MEAN QNH PRESSURE IN HPA 1013.8 1013.4 1013.3 1015.5 1017.2 1016.1 1015.7 1017.5 1019.0 1022.3 1017.9 1019.2 1016.7 MAX. QNH PRESSURE IN HPA 1021.9 1019.0 1023.7 1023.9 1020.8 1021.7 1020.5 1022.1 1022.8 1027.2 1024.1 1026.2 1027.2 DAY 27 8 31 17 27 23 28 31 24 18 21 27 MIN. QNH PRESSURE IN HPA 1005.7 1005.2 1004.4 1009.9 1011.5 1011.8 1010.7 1012.6 1015.2 1018.3 1010.6 1012.1 1004.4 DAY 9 5 12 27 6 4 12 13 29 6 14 5 MEAN QFF PRESSURE IN HPA 1020.2 1016.6 1013.0 1009.9 1005.0 998.0 994.4 996.4 1000.4 1010.3 1011.6 1015.7 1007.6 MAX. QFF PRESSURE IN HPA 1029.4 1031.0 1023.0 1019.2 1012.0 1002.1 999.8 1001.0 1006.5 1014.7 1021.5 1023.8 1031.0 DAY 21 10 31 1 15 22 26 29 24 18 30 27 MIN. QFF PRESSURE IN HPA 1002.3 1003.1 1004.0 1000.9 998.2 993.0 988.1 991.5 995.6 1004.7 1001.9 1006.7 988.1 DAY 9 3 9 21 31 26 12 13 3 6 11 3 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 767.8 767.6 767.8 769.9 770.9 770.3 770.0 771.4 772.5 775.2 771.3 772.3 770.6 MAX. QFE PRESSURE IN HPA 774.5 772.1 775.4 776.5 774.5 774.8 773.8 774.8 775.4 779.1 776.1 777.8 779.1 DAY 27 8 31 18 27 23 28 31 23 17 21 27 MIN. QFE PRESSURE IN HPA 761.2 761.3 760.8 765.1 765.5 767.0 766.2 767.6 769.1 771.7 765.7 766.9 760.8 DAY 8 3 12 13 6 4 12 13 29 28 16 5 MEAN QNH PRESSURE IN HPA 1013.7 1013.4 1013.7 1016.3 1017.6 1016.8 1016.4 1018.2 1019.6 1022.9 1018.0 1019.4 1017.2 MAX. QNH PRESSURE IN HPA 1022.1 1019.1 1023.2 1024.6 1022.1 1022.5 1021.2 1022.5 1023.2 1027.9 1024.1 1026.2 1027.9 DAY 27 8 31 18 27 23 28 31 23 17 21 27 MIN. QNH PRESSURE IN HPA 1005.4 1005.6 1004.9 1010.3 1010.8 1012.7 1011.7 1013.5 1015.3 1018.6 1011.1 1012.6 1004.9 DAY 8 3 12 13 6 4 12 13 29 28 16 5 MEAN QFF PRESSURE IN HPA 1021.8 1017.7 1014.6 1011.6 1006.5 999.9 996.6 999.1 1003.7 1013.6 1013.3 1017.2 1009.6 MAX. QFF PRESSURE IN HPA 1034.4 1034.4 1025.1 1022.9 1012.6 1004.7 1002.2 1004.1 1008.9 1018.3 1023.7 1025.7 1034.4 DAY 27 10 31 1 15 22 28 31 24 17 30 26 MIN. QFF PRESSURE IN HPA 1004.0 1000.9 1005.7 1003.6 999.5 995.3 990.9 994.0 998.8 1008.0 1002.2 1007.6 990.9 DAY 8 3 9 26 29 26 10 11 3 6 11 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 768.9 768.6 768.7 770.8 771.6 770.7 770.3 772.1 773.2 776.1 772.3 773.3 771.4 MAX. QFE PRESSURE IN HPA 775.4 773.0 776.4 777.7 775.2 774.9 774.1 775.5 776.7 780.1 776.8 778.6 780.1 DAY 27 8 31 18 27 23 28 31 23 17 21 26 MIN. QFE PRESSURE IN HPA 760.7 761.7 761.7 764.8 766.6 767.5 766.4 768.1 770.1 772.7 766.3 767.6 760.7 DAY 8 3 12 27 6 4 13 12 29 28 14 4 MEAN QNH PRESSURE IN HPA 1015.0 1014.7 1014.9 1017.4 1018.5 1017.3 1016.8 1019.0 1020.5 1024.1 1019.3 1020.6 1018.2 MAX. QNH PRESSURE IN HPA 1023.2 1020.2 1024.5 1026.1 1023.0 1022.6 1021.6 1023.4 1024.9 1029.1 1025.0 1027.2 1029.1 DAY 27 8 31 18 27 23 28 31 23 17 21 26 MIN. QNH PRESSURE IN HPA 1004.8 1006.1 1006.1 1009.9 1012.2 1013.3 1012.0 1014.1 1016.6 1019.8 1011.8 1013.5 1004.8 DAY 8 3 12 27 6 4 13 12 29 28 14 4 MEAN QFF PRESSURE IN HPA 1023.1 1018.7 1014.8 1011.9 1006.0 998.5 995.0 997.9 1002.0 1012.7 1013.9 1017.7 1009.3 MAX. QFF PRESSURE IN HPA 1034.9 1035.5 1024.2 1022.0 1011.3 1004.4 1000.0 1003.0 1007.5 1018.1 1023.4 1025.7 1035.5 DAY 27 10 24 1 15 6 28 31 23 17 30 26 MIN. QFF PRESSURE IN HPA 1001.0 1003.6 1004.2 1005.1 997.8 994.1 989.1 993.0 997.1 1006.7 1004.8 1007.4 989.1 DAY 8 3 21 29 31 15 12 13 3 3 11 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 768.4 768.2 768.5 770.6 771.6 770.3 769.6 771.3 772.3 775.0 771.5 772.3 770.8 MAX. QFE PRESSURE IN HPA 774.6 772.2 776.4 776.9 774.6 774.0 773.7 774.6 775.5 778.7 775.5 777.5 778.7 DAY 27 8 31 18 15 23 27 30 23 17 20 26 MIN. QFE PRESSURE IN HPA 759.7 761.4 761.3 765.7 766.4 767.6 765.6 767.0 769.5 771.8 766.9 766.3 759.7 DAY 8 3 12 13 6 15 13 12 29 28 12 4 MEAN QNH PRESSURE IN HPA 1014.4 1014.2 1014.6 1017.2 1018.5 1016.8 1016.0 1018.1 1019.3 1022.7 1018.3 1019.4 1017.5 MAX. QNH PRESSURE IN HPA 1022.2 1019.2 1024.5 1025.1 1022.2 1021.5 1021.1 1022.2 1023.4 1027.4 1023.4 1025.9 1027.4 DAY 27 8 31 18 15 23 27 30 23 17 20 26 MIN. QNH PRESSURE IN HPA 1003.6 1005.7 1005.6 1011.1 1012.0 1013.5 1011.0 1012.7 1015.8 1018.7 1012.6 1011.8 1003.6 DAY 8 3 12 13 6 15 13 12 29 28 12 4 MEAN QFF PRESSURE IN HPA 1020.8 1016.7 1013.9 1011.3 1005.7 997.3 993.7 995.8 999.5 1010.0 1011.8 1014.8 1007.6 MAX. QFF PRESSURE IN HPA 1030.2 1030.4 1023.1 1019.0 1012.7 1002.7 999.0 1001.9 1004.4 1014.0 1021.1 1022.1 1030.4 DAY 22 9 30 1 3 22 27 28 23 31 30 26 MIN. QFF PRESSURE IN HPA 999.0 1001.2 1004.3 1004.7 997.1 991.9 988.6 988.0 993.9 1003.2 1005.1 1007.1 988.0 DAY 8 3 8 26 31 15 10 21 3 3 10 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 767.5 767.3 767.4 769.7 771.0 769.6 768.8 770.3 771.1 773.8 770.7 771.6 769.9 MAX. QFE PRESSURE IN HPA 773.3 771.0 774.9 775.2 773.6 772.4 772.3 773.6 774.1 777.7 774.6 776.6 777.7 DAY 27 9 31 17 27 9 27 28 23 17 20 26 MIN. QFE PRESSURE IN HPA 759.8 760.7 760.8 765.1 766.4 766.5 765.0 765.6 768.5 771.1 766.2 765.7 759.8 DAY 8 3 12 26 6 25 14 12 28 28 12 4 MEAN QNH PRESSURE IN HPA 1013.3 1013.1 1013.2 1016.1 1017.7 1016.0 1015.0 1016.9 1017.9 1021.3 1017.4 1018.4 1016.3 MAX. QNH PRESSURE IN HPA 1020.6 1017.7 1022.6 1023.0 1021.0 1019.5 1019.3 1021.0 1021.6 1026.1 1022.2 1024.7 1026.1 DAY 27 9 31 17 27 9 27 28 23 17 20 26 MIN. QNH PRESSURE IN HPA 1003.7 1004.8 1004.9 1010.3 1012.0 1012.1 1010.2 1011.0 1014.6 1017.8 1011.7 1011.1 1003.7 DAY 8 3 12 26 6 25 14 12 28 28 12 4 MEAN QFF PRESSURE IN HPA 1019.5 1016.1 1012.8 1010.2 1005.4 997.8 993.8 995.8 999.5 1009.4 1011.3 1014.8 1007.2 MAX. QFF PRESSURE IN HPA 1028.7 1030.4 1021.3 1018.1 1012.1 1002.4 999.7 1001.9 1004.9 1013.6 1020.6 1022.1 1030.4 DAY 19 9 31 6 5 22 25 28 30 17 30 26 MIN. QFF PRESSURE IN HPA 999.7 1002.8 1002.1 1003.0 998.5 992.6 987.7 990.4 995.0 1005.5 1004.2 1008.3 987.7 DAY 8 3 8 26 31 25 10 12 4 3 10 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 768.0 767.7 767.5 769.6 770.8 769.5 768.6 770.1 771.1 774.1 771.1 772.1 770.0 MAX. QFE PRESSURE IN HPA 773.8 771.7 774.2 775.1 773.6 772.2 772.6 773.8 773.9 777.7 774.8 777.1 777.7 DAY 26 9 30 16 27 9 26 28 23 17 20 26 MIN. QFE PRESSURE IN HPA 761.5 761.0 761.2 765.2 766.8 766.1 764.7 765.6 768.6 770.7 766.5 766.0 761.0 DAY 8 4 5 26 6 25 9 12 28 28 12 4 MEAN QNH PRESSURE IN HPA 1014.0 1013.6 1013.3 1016.0 1017.5 1015.8 1014.7 1016.6 1017.8 1021.6 1017.9 1019.0 1016.5 MAX. QNH PRESSURE IN HPA 1021.2 1018.6 1021.7 1022.8 1021.0 1019.2 1019.7 1021.2 1021.3 1026.1 1022.5 1025.4 1026.1 DAY 26 9 30 16 27 9 26 28 23 17 20 26 MIN. QNH PRESSURE IN HPA 1005.8 1005.2 1005.4 1010.5 1012.5 1011.6 1009.8 1011.0 1014.7 1017.3 1012.1 1011.5 1005.2 DAY 8 4 5 26 6 25 9 12 28 28 12 4 MEAN QFF PRESSURE IN HPA 1022.0 1017.8 1014.0 1011.1 1006.1 998.9 995.0 997.5 1002.0 1012.3 1013.2 1016.6 1008.9 MAX. QFF PRESSURE IN HPA 1032.8 1034.0 1024.6 1017.8 1011.2 1003.6 1000.7 1003.3 1008.7 1016.6 1022.6 1025.0 1034.0 DAY 22 9 24 5 1 5 26 28 30 17 30 26 MIN. QFF PRESSURE IN HPA 1002.5 1003.6 1002.7 1005.1 999.7 993.5 988.7 992.5 997.0 1007.4 1004.5 1006.5 988.7 DAY 8 2 5 25 31 25 10 12 3 6 10 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 768.6 768.3 768.3 770.5 771.4 770.2 769.5 771.1 772.1 774.9 771.7 772.7 770.8 MAX. QFE PRESSURE IN HPA 775.0 772.7 775.2 776.2 774.2 773.0 773.2 774.9 774.9 778.1 776.1 778.1 778.1 DAY 26 7 30 16 26 22 26 28 23 17 20 26 MIN. QFE PRESSURE IN HPA 761.5 761.5 762.2 766.2 767.8 766.5 765.6 766.5 769.3 771.3 767.0 766.7 761.5 DAY 8 3 5 12 6 25 9 12 28 28 10 4 MEAN QNH PRESSURE IN HPA 1014.7 1014.4 1014.3 1017.1 1018.2 1016.7 1015.8 1017.8 1019.2 1022.6 1018.6 1019.9 1017.4 MAX. QNH PRESSURE IN HPA 1022.7 1019.8 1023.0 1024.2 1021.7 1020.2 1020.5 1022.6 1022.6 1026.6 1024.1 1026.6 1026.6 DAY 26 7 30 16 26 22 26 28 23 17 20 26 MIN. QNH PRESSURE IN HPA 1005.8 1005.8 1006.7 1011.7 1013.7 1012.1 1011.0 1012.1 1015.6 1018.1 1012.7 1012.3 1005.8 DAY 8 3 5 12 6 25 9 12 28 28 10 4 MEAN QFF PRESSURE IN HPA 1022.7 1018.3 1014.2 1011.5 1005.5 998.0 994.2 996.8 1000.9 1011.4 1013.3 1016.8 1008.6 MAX. QFF PRESSURE IN HPA 1034.2 1034.0 1023.6 1017.6 1011.0 1002.3 999.0 1003.1 1007.4 1015.2 1022.3 1025.5 1034.2 DAY 22 9 13 16 14 5 26 28 30 16 30 26 MIN. QFF PRESSURE IN HPA 1000.9 1005.1 1004.2 1004.2 998.0 992.2 988.7 991.3 996.1 1005.4 1002.9 1006.9 988.7 DAY 8 3 5 20 31 25 9 12 2 3 10 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 768.4 768.2 768.3 770.2 771.2 770.1 769.7 771.2 772.2 774.9 771.4 772.5 770.7 MAX. QFE PRESSURE IN HPA 775.0 772.7 775.8 776.9 774.3 774.4 773.6 774.6 775.1 778.6 776.1 778.1 778.6 DAY 26 7 30 16 26 22 27 30 23 17 20 26 MIN. QFE PRESSURE IN HPA 761.5 761.4 762.5 765.4 767.3 767.0 765.4 766.8 769.6 771.4 765.8 766.5 761.4 DAY 8 4 5 12 6 3 11 12 28 5 13 4 MEAN QNH PRESSURE IN HPA 1014.5 1014.2 1014.3 1016.7 1018.0 1016.6 1016.0 1018.0 1019.2 1022.6 1018.3 1019.6 1017.3 MAX. QNH PRESSURE IN HPA 1022.7 1019.8 1023.7 1025.1 1021.9 1022.0 1021.0 1022.2 1022.8 1027.2 1024.1 1026.6 1027.2 DAY 26 7 30 16 26 22 27 30 23 17 20 26 MIN. QNH PRESSURE IN HPA 1005.8 1005.7 1007.1 1010.7 1013.1 1012.7 1010.7 1012.5 1016.0 1018.2 1011.2 1012.1 1005.7 DAY 8 4 5 12 6 3 11 12 28 5 13 4 MEAN QFF PRESSURE IN HPA 1020.7 1016.7 1013.7 1010.8 1005.0 997.0 993.8 995.8 999.4 1010.0 1011.9 1014.9 1007.5 MAX. QFF PRESSURE IN HPA 1030.3 1030.9 1023.7 1017.8 1010.7 1002.6 998.6 1001.4 1005.6 1015.5 1020.6 1023.4 1030.9 DAY 21 9 30 16 14 22 27 30 30 30 29 26 MIN. QFF PRESSURE IN HPA 1001.5 1001.3 1004.0 1000.6 997.0 992.1 987.1 990.2 994.3 1002.3 1001.9 1006.8 987.1 DAY 8 2 5 20 31 30 11 12 3 5 10 2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.5 -2.2 1.8 10.1 13.9 20.1 25.2 24.4 17.5 11.1 5.0 -3.0 10.1 MINIMUN AIR TEMPERATURE (C) -7.6 -7.7 -2.6 3.5 7.0 10.6 15.0 14.8 8.3 5.7 0.4 -8.4 3.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 22 21 10 0 0 0 0 0 0 0 3 24 80 DAYS WITH FREEZING MIN.<= 0 26 28 24 4 0 0 0 0 0 0 13 27 122 TEMPERATURE RECORDS LOWEST(C) -22.6 -16.6 -9.4 -1.8 0.4 5.4 9.4 11.6 2.4 1.8 -8.0 -21.4 -22.6 DAY 28 25 18 3 7 30 1 26 23 13 19 8 MAXIMUM AIR TEMPERATURE (C) 3.9 3.2 7.1 15.8 19.7 26.2 31.4 31.4 23.7 17.1 10.2 2.9 16.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 28 23 0 0 0 0 51 DAYS WITH MAXIMUM TEMP. <= 0 6 2 0 0 0 0 0 0 0 0 0 6 14 TEMPERATURE RECORDS HIGHEST(C) 11.4 7.2 12.6 21.0 25.6 28.4 33.4 34.8 29.8 20.8 15.2 8.8 34.8 DAY 1 8 30 22 31 10 21 4 2 5 3 29 DIF. BETWEEN (MAX.-MIN.) (C) 11.5 10.9 9.7 12.3 12.7 15.6 16.4 16.6 15.4 11.4 9.8 11.3 12.8 MEAN DAILY TEMP. (MDT) (C) -1.8 -2.2 2.2 9.7 13.3 18.4 23.2 23.1 16.0 11.4 5.3 -2.7 9.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.0 70.8 66.8 0.3 0.0 0.0 0.0 137.9 HEATING DEG. DAYS(BASE 18 0C) 615.2 566.2 488.5 250.2 144.7 14.5 0.0 0.0 70.6 205.5 382.1 642.6 3380.1 DEWPOINT (MEAN C) -8.6 -9.7 -6.1 -1.6 -0.4 -0.5 4.5 3.7 0.3 1.6 -2.8 -11.9 -2.6 MIXING RATIO (G/KG) 2.83 2.54 3.32 4.57 5.01 4.92 7.09 6.66 5.25 5.69 4.31 2.22 4.53 VAPOUR PRESSURE (HPA) 3.48 3.11 4.08 5.62 6.15 6.02 8.64 8.14 6.46 7.02 5.31 2.73 5.56 SATURATION DEF. (HPA) 2.11 2.29 3.11 7.31 10.48 18.48 24.69 23.87 14.71 6.65 3.73 2.56 10.00 RELATIVE HUMIDITY (MEAN %) 66 60 59 48 41 27 29 28 34 56 61 54 47 RELATIVE HUMIDITY (MAX. %) 85 80 80 74 67 48 50 46 53 78 82 75 68 RELATIVE HUMIDITY (MIN. %) 43 40 40 28 23 16 18 17 22 35 40 35 30 RELATIVE HUMIDITY (MEAN% 03UTC) 77 69 71 68 62 47 50 45 53 74 70 62 62 RELATIVE HUMIDITY (MEAN% 09UTC) 57 54 48 33 31 17 22 19 24 40 52 47 37 RELATIVE HUMIDITY (MEAN% 15UTC) 61 58 55 39 32 20 22 21 28 48 60 46 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 259.7 143.9 213.7 95.4 76.1 0.0 0.0 0.0 5.0 62.5 700.8 201.2 1758.3 DAYS WITH PRECIPITATION >=10 6 2 7 3 2 0 0 0 0 3 10 8 41 DAYS WITH PRECIPITATION >= 5 9 3 11 3 4 0 0 0 1 6 14 10 61 DAYS WITH PRECIPITATION >= 1 11 6 12 4 6 0 0 0 1 6 17 12 75 DAYS WITH PRECIPITATION 12 9 14 6 9 0 0 0 1 12 19 12 94 GREATEST DAILY PRECIPITATION 56.0 102.0 78.2 43.0 35.0 0.0 0.0 0.0 5.0 17.3 94.0 60.0 102.0 DAY 16 1 12 1 4 ** ** ** 29 19 25 3 DAY WITH THUNDER STORM 4 1 3 3 5 0 0 0 0 1 12 6 35 DAYS WITH SNOW OR SLEET 12 10 14 0 0 0 0 0 0 0 8 13 57 DAYS WITH DUST 1 1 0 0 0 1 0 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.7 10.1 9.2 8.3 7.6 7.5 8.4 9.5 7.7 7.3 9.6 11.4 8.8 PREVAILING WIND PERCENT 8.1 12.1 14.9 18.8 21.4 13.2 12.2 19.0 12.3 9.7 17.1 15.7 14.6 CALMS PERCENT OF WIND 75.0 71.0 67.7 59.2 54.0 62.3 63.0 57.0 65.4 74.6 52.1 60.5 63.5 NO. OF WIND OBSERVATION 248 224 248 240 248 204 181 221 162 248 240 248 2712 VECTOR WIND DIRECTION (MEAN) 260 263 252 263 277 269 255 251 264 278 251 254 260 VECTOR WIND MAGNITUDE(KNOTS) 1.0 2.0 2.1 2.5 2.7 2.0 1.9 2.5 1.4 1.1 2.9 3.2 2.1 WIND STEADINESES (MEAN %) 52.6 74.1 77.8 80.6 75.0 69.0 63.3 65.8 48.3 57.9 60.4 71.1 67.7 WIND SPEED (MEAN KNOTS) 1.9 2.7 2.7 3.1 3.6 2.9 3.0 3.8 2.9 1.9 4.8 4.5 3.1 FASTEST WIND DIRECTION 240 280 240 220 300 160 310 270 330 300 170 280 280 FASTEST WIND SPEED (KNOTS) 19 29 16 27 19 16 19 19 19 23 27 35 35 DAY 22 1 20 2 27 21 16 1 26 27 25 20 DAYS WITH SKY CLEAR (0-2)/8 14 17 12 14 21 28 31 30 22 13 11 17 230 DAYS WITH P.CLOUDY (3-6)/8 9 7 11 11 6 2 0 1 8 13 6 11 85 DAYS WITH CLOUDY (7-8)/8 8 4 8 5 4 0 0 0 0 5 13 3 50 DAYS WITH VISIBILITY =< 2 KM 7 3 5 0 0 0 0 0 0 0 1 8 24 DURATION OF SUNSHINE HOURS ****** ****** 198.4 246.3 312.8 347.5 345.0 348.6 267.7 210.2 137.5 158.7 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 769.4 766.9 768.5 770.9 771.0 768.1 766.5 768.5 773.3 774.5 771.5 770.0 769.9 MAX. QFE PRESSURE IN HPA 776.2 772.6 774.5 776.2 775.0 772.3 769.8 772.6 779.8 778.7 778.4 775.0 779.8 DAY-HOUR 10- 6 20- 6 18- 6 29- 6 15- 6 9- 6 3- 6 15- 6 23- 6 11- 6 2- 6 28- 6 MIN. QFE PRESSURE IN HPA 757.5 759.7 759.1 765.4 765.0 764.2 764.0 764.7 766.5 770.8 761.1 758.4 757.5 DAY-HOUR 16-12 1- 6 11-21 3- 0 6- 0 29- 9 21-12 1-15 5-15 3-12 25-15 5- 0 MEAN QNH PRESSURE IN HPA 1015.7 1012.6 1014.6 1017.6 1017.7 1014.1 1012.1 1014.6 1020.6 1022.1 1018.4 1016.5 1016.4 MAX. QNH PRESSURE IN HPA 1024.2 1019.7 1022.1 1024.2 1022.7 1019.3 1016.2 1019.7 1028.7 1027.4 1027.0 1022.7 1028.7 DAY-HOUR 10- 6 20- 6 18- 6 29- 6 15- 6 9- 6 3- 6 15- 6 23- 6 11- 6 2- 6 28- 6 MIN. QNH PRESSURE IN HPA 1000.8 1003.6 1002.8 1010.7 1010.2 1009.2 1008.9 1009.8 1012.1 1017.5 1005.3 1001.9 1000.8 DAY-HOUR 16-12 1- 6 11-21 3- 0 6- 0 29- 9 21-12 1-15 5-15 3-12 25-15 5- 0 MEAN QFF PRESSURE IN HPA 1017.9 1014.4 1012.4 1007.5 1004.0 995.9 ****** 991.5 ****** 1010.9 1013.0 1019.4 ****** MAX. QFF PRESSURE IN HPA 1040.2 1028.3 1024.3 1016.7 1011.6 1001.3 ****** 999.1 ****** 1018.7 1025.4 1038.3 ****** DAY-HOUR 28- 6 20- 6 18- 3 5-15 8- 3 17- 3 **-** 23- 3 **-** 20- 6 19-15 8- 3 MIN. QFF PRESSURE IN HPA 998.9 999.3 1000.7 998.4 997.5 991.6 ****** 985.1 ****** 1002.5 996.2 997.7 ****** DAY-HOUR 16-12 11-21 12-12 30- 9 6- 3 4-12 **-** 1- 9 **-** 3-12 25-15 3-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 769.3 766.6 767.9 770.8 770.6 768.7 ****** 768.4 ****** 774.3 771.2 769.5 ****** MAX. QFE PRESSURE IN HPA 774.9 770.9 772.9 774.2 774.0 770.8 ****** 771.0 ****** 777.1 777.0 773.1 ****** DAY 10 21 19 15 15 9 ** 8 ** 11 2 28 MIN. QFE PRESSURE IN HPA 761.5 759.9 759.3 765.4 765.0 764.9 ****** 765.5 ****** 771.6 763.4 758.4 ****** DAY 24 12 12 3 6 5 ** 1 ** 3 26 5 MEAN QNH PRESSURE IN HPA 1015.6 1012.2 1013.9 1017.5 1017.2 1014.8 ****** 1014.4 ****** 1021.8 1018.0 1015.9 ****** MAX. QNH PRESSURE IN HPA 1022.6 1017.6 1020.1 1021.7 1021.5 1017.5 ****** 1017.7 ****** 1025.4 1025.2 1020.3 ****** DAY 10 21 19 15 15 9 ** 8 ** 11 2 28 MIN. QNH PRESSURE IN HPA 1005.8 1003.8 1003.1 1010.7 1010.2 1010.1 ****** 1010.8 ****** 1018.5 1008.2 1001.9 ****** DAY 24 12 12 3 6 5 ** 1 ** 3 26 5 MEAN QFF PRESSURE IN HPA 1017.2 1013.2 1011.5 1007.3 1003.5 996.0 ****** 990.8 ****** 1010.1 1012.1 1018.3 ****** MAX. QFF PRESSURE IN HPA 1035.7 1024.4 1020.8 1014.1 1009.1 998.9 ****** 994.5 ****** 1018.3 1021.6 1036.2 ****** DAY 28 20 18 6 15 1 ** 22 ** 20 20 8 MIN. QFF PRESSURE IN HPA 1005.8 999.7 1001.0 999.1 998.7 992.2 ****** 987.1 ****** 1003.7 1004.0 1000.8 ****** DAY 16 12 12 27 24 4 ** 4 ** 2 26 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 769.4 766.6 768.3 771.1 771.0 768.1 767.0 769.0 773.7 774.6 771.5 769.7 770.0 MAX. QFE PRESSURE IN HPA 775.6 770.9 773.4 775.5 774.7 771.5 769.3 771.7 778.9 777.7 777.3 773.6 778.9 DAY 10 20 19 29 15 9 3 15 23 11 2 28 MIN. QFE PRESSURE IN HPA 762.4 760.2 759.2 765.7 765.2 764.6 765.2 766.0 768.6 771.6 763.8 759.1 759.1 DAY 26 12 12 3 6 29 8 2 1 3 26 4 MEAN QNH PRESSURE IN HPA 1015.7 1012.2 1014.3 1017.9 1017.7 1014.1 1012.7 1015.2 1021.1 1022.2 1018.4 1016.1 1016.5 MAX. QNH PRESSURE IN HPA 1023.5 1017.6 1020.7 1023.4 1022.4 1018.3 1015.6 1018.6 1027.6 1026.1 1025.6 1021.0 1027.6 DAY 10 20 19 29 15 9 3 15 23 11 2 28 MIN. QNH PRESSURE IN HPA 1006.9 1004.2 1002.9 1011.1 1010.5 1009.7 1010.5 1011.5 1014.7 1018.5 1008.7 1002.8 1002.8 DAY 26 12 12 3 6 29 8 2 1 3 26 4 MEAN QFF PRESSURE IN HPA 1019.1 1015.2 1013.4 1009.3 1005.2 996.9 991.4 994.5 1007.3 1012.4 1013.9 1019.8 1008.2 MAX. QFF PRESSURE IN HPA 1039.7 1026.4 1024.3 1016.4 1011.6 1001.3 995.7 999.1 1019.1 1018.2 1025.1 1038.3 1039.7 DAY 28 20 18 5 8 17 1 23 23 20 20 8 MIN. QFF PRESSURE IN HPA 1004.8 1001.0 1001.2 1000.0 997.5 992.1 988.5 989.9 995.9 1004.9 1003.8 1001.3 988.5 DAY 16 1 12 27 6 4 22 4 1 2 26 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 770.3 767.5 769.3 771.9 771.5 768.5 767.4 769.5 774.5 775.5 772.7 770.9 770.8 MAX. QFE PRESSURE IN HPA 776.2 772.6 774.5 776.2 775.0 772.3 769.8 772.6 779.8 778.7 778.4 775.0 779.8 DAY 10 20 18 29 15 9 3 15 23 11 2 28 MIN. QFE PRESSURE IN HPA 762.1 759.7 760.4 766.5 765.6 764.5 765.4 766.6 769.5 772.3 765.7 759.7 759.7 DAY 16 1 12 3 6 29 21 2 1 3 26 4 MEAN QNH PRESSURE IN HPA 1016.9 1013.3 1015.6 1018.8 1018.4 1014.6 1013.2 1015.9 1022.0 1023.4 1019.9 1017.5 1017.5 MAX. QNH PRESSURE IN HPA 1024.2 1019.7 1022.1 1024.2 1022.7 1019.3 1016.2 1019.7 1028.7 1027.4 1027.0 1022.7 1028.7 DAY 10 20 18 29 15 9 3 15 23 11 2 28 MIN. QNH PRESSURE IN HPA 1006.6 1003.6 1004.4 1012.1 1011.0 1009.6 1010.7 1012.2 1015.8 1019.3 1011.1 1003.6 1003.6 DAY 16 1 12 3 6 29 21 2 1 3 26 4 MEAN QFF PRESSURE IN HPA 1019.9 1015.7 1013.5 1008.5 1004.3 996.4 ****** 991.9 ****** 1012.0 1014.9 1021.1 ****** MAX. QFF PRESSURE IN HPA 1040.2 1028.3 1024.1 1016.2 1010.5 999.5 ****** 997.7 ****** 1018.7 1025.3 1038.3 ****** DAY 28 20 18 5 8 8 ** 22 ** 20 19 8 MIN. QFF PRESSURE IN HPA 1003.9 999.6 1001.4 1001.2 997.8 992.1 ****** 987.4 ****** 1004.8 1005.4 1004.5 ****** DAY 16 1 12 26 6 4 ** 1 ** 3 26 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 769.6 767.2 769.0 771.2 771.3 767.9 766.6 768.5 773.3 774.6 771.8 770.3 770.1 MAX. QFE PRESSURE IN HPA 775.1 772.1 774.2 775.1 775.0 771.4 768.7 771.6 778.8 777.5 777.5 774.3 778.8 DAY 10 20 18 29 15 9 3 8 23 10 2 28 MIN. QFE PRESSURE IN HPA 759.4 762.1 760.4 765.8 766.0 764.2 764.5 765.5 768.3 771.5 764.8 759.2 759.2 DAY 16 1 12 3 1 29 21 1 5 3 25 4 MEAN QNH PRESSURE IN HPA 1016.0 1013.0 1015.3 1017.9 1018.0 1013.9 1012.2 1014.6 1020.7 1022.2 1018.7 1016.9 1016.6 MAX. QNH PRESSURE IN HPA 1022.8 1019.1 1021.7 1022.8 1022.7 1018.2 1014.8 1018.5 1027.5 1025.9 1025.9 1021.9 1027.5 DAY 10 20 18 29 15 9 3 8 23 10 2 28 MIN. QNH PRESSURE IN HPA 1003.2 1006.6 1004.4 1011.2 1011.5 1009.2 1009.6 1010.8 1014.3 1018.3 1009.9 1002.9 1002.9 DAY 16 1 12 3 1 29 21 1 5 3 25 4 MEAN QFF PRESSURE IN HPA 1016.9 1013.9 1012.1 1006.7 1003.5 995.1 ****** 989.8 ****** 1009.8 1012.5 1018.9 ****** MAX. QFF PRESSURE IN HPA 1036.6 1025.4 1021.3 1015.0 1009.6 997.9 ****** 995.2 ****** 1015.2 1021.8 1032.6 ****** DAY 28 20 18 5 4 9 ** 22 ** 20 20 8 MIN. QFF PRESSURE IN HPA 1000.6 1002.0 1001.7 998.4 998.6 991.9 ****** 985.1 ****** 1002.8 1003.4 1002.5 ****** DAY 16 1 12 30 24 13 ** 1 ** 3 25 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 768.6 766.3 768.1 770.3 770.5 767.4 765.9 767.6 772.1 773.6 771.0 769.5 769.2 MAX. QFE PRESSURE IN HPA 773.7 770.5 773.2 774.1 774.3 770.3 767.7 770.5 777.7 776.7 776.6 773.4 777.7 DAY 10 20 18 29 14 1 25 8 23 19 1 30 MIN. QFE PRESSURE IN HPA 757.5 762.2 759.5 765.6 766.0 764.4 764.0 764.9 766.9 770.8 763.5 758.9 757.5 DAY 16 12 12 3 1 29 21 1 5 3 25 4 MEAN QNH PRESSURE IN HPA 1014.7 1011.9 1014.0 1016.8 1017.1 1013.2 1011.3 1013.5 1019.2 1021.0 1017.7 1015.8 1015.5 MAX. QNH PRESSURE IN HPA 1021.1 1017.1 1020.5 1021.6 1021.9 1016.8 1013.6 1017.1 1026.1 1024.9 1024.7 1020.7 1026.1 DAY 10 20 18 29 14 1 25 8 23 19 1 30 MIN. QNH PRESSURE IN HPA 1000.8 1006.7 1003.3 1011.0 1011.5 1009.4 1008.9 1010.1 1012.6 1017.5 1008.3 1002.6 1000.8 DAY 16 12 12 3 1 29 21 1 5 3 25 4 MEAN QFF PRESSURE IN HPA 1016.3 1012.9 1011.5 1006.6 1003.4 995.7 ****** 989.9 ****** 1009.5 1011.9 1018.2 ****** MAX. QFF PRESSURE IN HPA 1034.1 1022.9 1020.6 1014.0 1008.6 998.8 ****** 993.4 ****** 1017.8 1022.4 1033.4 ****** DAY 28 20 18 5 9 17 ** 22 ** 19 19 7 MIN. QFF PRESSURE IN HPA 998.9 1003.9 1000.7 998.9 998.6 991.6 ****** 986.4 ****** 1002.5 1001.3 997.7 ****** DAY 16 12 12 30 24 4 ** 3 ** 3 25 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 769.1 766.6 768.1 770.1 770.5 767.2 765.8 767.6 772.4 774.0 771.3 769.8 769.4 MAX. QFE PRESSURE IN HPA 774.5 771.1 773.2 773.9 773.9 770.2 767.7 769.9 777.7 776.5 776.9 773.4 777.7 DAY 9 20 18 29 14 2 25 8 23 19 2 30 MIN. QFE PRESSURE IN HPA 760.9 763.1 760.2 765.5 766.2 764.5 764.3 764.7 766.5 770.8 761.1 759.0 759.0 DAY 23 11 12 3 1 27 21 1 5 3 25 4 MEAN QNH PRESSURE IN HPA 1015.3 1012.2 1014.1 1016.6 1017.1 1013.0 1011.2 1013.4 1019.4 1021.5 1018.1 1016.2 1015.7 MAX. QNH PRESSURE IN HPA 1022.1 1017.8 1020.5 1021.3 1021.3 1016.7 1013.6 1016.3 1026.1 1024.6 1025.1 1020.7 1026.1 DAY 9 20 18 29 14 2 25 8 23 19 2 30 MIN. QNH PRESSURE IN HPA 1005.1 1007.8 1004.2 1010.8 1011.7 1009.6 1009.3 1009.8 1012.1 1017.5 1005.3 1002.7 1002.7 DAY 23 11 12 3 1 27 21 1 5 3 25 4 MEAN QFF PRESSURE IN HPA 1018.7 1015.3 1013.0 1007.9 1004.6 995.8 989.9 992.8 1005.6 1011.7 1013.6 1019.9 1007.4 MAX. QFF PRESSURE IN HPA 1036.6 1025.7 1023.2 1016.7 1010.3 1000.7 992.8 996.3 1016.7 1017.5 1025.4 1036.6 1036.6 DAY 28 20 17 5 8 17 25 23 23 19 19 7 MIN. QFF PRESSURE IN HPA 1006.0 1007.0 1002.9 998.5 1000.5 992.1 987.0 988.3 994.2 1003.6 996.2 998.4 987.0 DAY 23 12 12 30 5 4 21 6 1 2 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 769.6 767.3 768.9 771.1 771.4 768.8 ****** 768.6 ****** 774.9 771.6 770.3 ****** MAX. QFE PRESSURE IN HPA 775.6 772.0 773.9 774.7 774.6 771.0 ****** 771.2 ****** 777.2 777.0 774.1 ****** DAY 9 20 31 5 14 2 ** 15 ** 10 1 28 MIN. QFE PRESSURE IN HPA 760.9 762.2 760.7 765.9 766.8 765.4 ****** 765.6 ****** 772.0 761.2 759.2 ****** DAY 23 11 11 2 1 4 ** 1 ** 3 25 3 MEAN QNH PRESSURE IN HPA 1016.0 1013.0 1015.1 1017.8 1018.2 1015.0 ****** 1014.7 ****** 1022.6 1018.5 1016.9 ****** MAX. QNH PRESSURE IN HPA 1023.5 1019.0 1021.3 1022.4 1022.2 1017.7 ****** 1018.0 ****** 1025.5 1025.2 1021.6 ****** DAY 9 20 31 5 14 2 ** 15 ** 10 1 28 MIN. QNH PRESSURE IN HPA 1005.1 1006.7 1004.8 1011.3 1012.5 1010.7 ****** 1011.0 ****** 1019.0 1005.4 1002.9 ****** DAY 23 11 11 2 1 4 ** 1 ** 3 25 3 MEAN QFF PRESSURE IN HPA 1019.0 1015.5 1012.9 1007.3 1004.2 995.5 ****** 990.9 ****** 1011.4 1013.5 1020.5 ****** MAX. QFF PRESSURE IN HPA 1037.3 1026.7 1023.2 1015.2 1010.1 997.6 ****** 995.4 ****** 1016.5 1024.5 1038.2 ****** DAY 18 20 17 5 7 17 ** 22 ** 19 19 7 MIN. QFF PRESSURE IN HPA 1005.8 1006.9 1001.4 1001.2 998.8 992.7 ****** 986.9 ****** 1004.4 998.7 1000.7 ****** DAY 23 11 11 30 5 12 ** 1 ** 2 25 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 769.3 767.2 768.8 771.1 771.3 768.9 ****** 769.0 ****** 774.8 771.3 770.1 ****** MAX. QFE PRESSURE IN HPA 775.6 771.7 773.6 774.7 774.7 771.2 ****** 771.5 ****** 777.3 776.8 773.5 ****** DAY 9 20 30 5 15 9 ** 7 ** 10 1 27 MIN. QFE PRESSURE IN HPA 761.5 760.0 759.1 765.9 766.6 765.6 ****** 766.0 ****** 772.2 762.4 759.6 ****** DAY 23 11 11 2 5 4 ** 1 ** 2 25 4 MEAN QNH PRESSURE IN HPA 1015.6 1012.9 1014.9 1017.9 1018.1 1015.1 ****** 1015.2 ****** 1022.4 1018.1 1016.5 ****** MAX. QNH PRESSURE IN HPA 1023.5 1018.6 1021.0 1022.4 1022.4 1018.0 ****** 1018.3 ****** 1025.6 1025.0 1020.8 ****** DAY 9 20 30 5 15 9 ** 7 ** 10 1 27 MIN. QNH PRESSURE IN HPA 1005.8 1003.9 1002.8 1011.3 1012.2 1011.0 ****** 1011.5 ****** 1019.2 1006.9 1003.4 ****** DAY 23 11 11 2 5 4 ** 1 ** 2 25 4 MEAN QFF PRESSURE IN HPA 1016.6 1014.0 1011.6 1006.5 1003.4 995.1 ****** 990.3 ****** 1010.1 1011.9 1018.7 ****** MAX. QFF PRESSURE IN HPA 1034.5 1023.9 1020.1 1015.0 1010.4 998.3 ****** 995.4 ****** 1016.9 1021.9 1035.3 ****** DAY 18 20 17 5 4 1 ** 22 ** 19 19 7 MIN. QFF PRESSURE IN HPA 1002.0 999.3 1000.7 998.5 997.6 991.8 ****** 986.5 ****** 1004.0 1001.3 1002.5 ****** DAY 31 11 11 30 31 13 ** 1 ** 2 25 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.1 -2.5 1.7 7.2 13.4 18.3 23.2 23.1 18.0 11.3 6.7 -5.4 9.3 MINIMUN AIR TEMPERATURE (C) -9.6 -8.6 -3.6 1.9 7.4 9.8 13.8 13.9 9.5 3.4 0.1 -11.2 2.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 27 23 15 0 0 0 0 0 0 0 5 27 97 DAYS WITH FREEZING MIN.<= 0 30 26 23 6 0 0 0 0 0 3 15 31 134 TEMPERATURE RECORDS LOWEST(C) -15.0 -21.4 -13.4 -2.4 0.6 5.6 7.4 12.0 4.2 -0.2 -8.8 -20.6 -21.4 DAY 15 26 1 13 10 1 2 30 22 23 27 14 MAXIMUM AIR TEMPERATURE (C) 3.8 4.0 7.0 12.5 19.3 24.7 31.0 30.8 25.1 18.8 13.5 2.1 16.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 20 27 1 0 0 0 48 DAYS WITH MAXIMUM TEMP. <= 0 0 3 0 0 0 0 0 0 0 0 0 8 11 TEMPERATURE RECORDS HIGHEST(C) 8.8 7.4 9.8 16.8 23.4 28.6 34.2 32.2 30.6 24.4 19.0 8.6 34.2 DAY 16 3 31 30 23 21 14 7 1 1 21 3 DIF. BETWEEN (MAX.-MIN.) (C) 13.4 12.6 10.6 10.6 11.9 14.9 17.2 16.9 15.6 15.4 13.4 13.3 13.8 MEAN DAILY TEMP. (MDT) (C) -2.9 -2.3 1.7 7.2 13.3 17.2 22.4 22.3 17.3 11.1 6.8 -4.6 9.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.0 58.6 40.9 1.2 0.0 0.0 0.0 100.7 HEATING DEG. DAYS(BASE 18 0C) 647.9 568.3 505.5 325.2 144.3 37.4 1.4 0.0 42.3 215.1 336.6 699.9 3524.0 DEWPOINT (MEAN C) -10.4 -9.3 -6.9 -1.6 2.9 2.4 2.2 0.5 -0.7 -3.2 -6.1 -8.9 -3.3 MIXING RATIO (G/KG) 2.40 2.65 3.11 4.58 6.33 6.11 6.01 5.29 4.83 4.08 3.27 2.70 4.28 VAPOUR PRESSURE (HPA) 2.96 3.25 3.82 5.63 7.77 7.48 7.34 6.49 5.94 5.04 4.03 3.33 5.26 SATURATION DEF. (HPA) 2.18 2.17 3.30 4.81 8.14 14.53 22.58 22.99 15.72 9.10 6.44 1.09 9.42 RELATIVE HUMIDITY (MEAN %) 60 62 56 57 52 39 28 24 31 41 43 79 48 RELATIVE HUMIDITY (MAX. %) 79 82 73 79 74 61 48 41 50 65 69 94 68 RELATIVE HUMIDITY (MIN. %) 41 44 41 39 35 22 14 14 18 21 25 58 31 RELATIVE HUMIDITY (MEAN% 03UTC) 72 74 67 73 68 60 48 40 48 63 62 88 64 RELATIVE HUMIDITY (MEAN% 09UTC) 51 56 45 47 42 25 16 16 20 28 31 69 37 RELATIVE HUMIDITY (MEAN% 15UTC) 52 54 52 53 44 28 19 17 25 32 34 72 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 127.3 190.9 79.1 168.2 62.3 3.5 0.0 0.0 12.0 17.9 20.6 83.4 765.2 DAYS WITH PRECIPITATION >=10 4 7 2 7 3 0 0 0 1 1 2 4 31 DAYS WITH PRECIPITATION >= 5 5 8 5 9 4 0 0 0 1 2 2 6 42 DAYS WITH PRECIPITATION >= 1 7 10 9 12 7 2 0 0 1 3 2 8 61 DAYS WITH PRECIPITATION 8 11 12 15 10 3 1 0 2 3 5 11 81 GREATEST DAILY PRECIPITATION 56.7 62.0 34.0 33.0 23.0 2.0 0.0 0.0 12.0 11.7 10.0 22.4 62.0 DAY 12 23 17 12 30 5 ** ** 20 22 11 12 DAY WITH THUNDER STORM 0 1 2 5 8 3 0 0 1 0 2 0 22 DAYS WITH SNOW OR SLEET 9 10 8 3 0 0 0 0 0 0 2 12 44 DAYS WITH DUST 1 1 0 0 1 0 0 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 225 270 PREVAILING WIND SPEED(KNOTS) 11.2 9.8 10.8 8.8 8.0 9.2 8.4 9.2 10.0 9.6 9.5 7.2 9.6 PREVAILING WIND PERCENT 15.7 14.7 31.5 26.7 15.3 20.4 10.9 15.7 19.2 16.5 16.3 4.8 17.3 CALMS PERCENT OF WIND 71.4 68.8 51.2 52.9 56.0 52.9 67.7 62.1 58.3 68.1 60.7 86.3 63.1 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 239 248 2919 VECTOR WIND DIRECTION (MEAN) 259 240 256 267 259 274 230 249 253 257 265 256 257 VECTOR WIND MAGNITUDE(KNOTS) 2.7 2.8 4.2 3.2 2.7 3.2 1.4 1.7 2.9 2.3 2.4 0.8 2.5 WIND STEADINESES (MEAN %) 84.4 84.8 84.0 82.1 64.3 76.2 53.8 53.1 72.5 79.3 60.0 72.7 71.4 WIND SPEED (MEAN KNOTS) 3.2 3.3 5.0 3.9 4.2 4.2 2.6 3.2 4.0 2.9 4.0 1.1 3.5 FASTEST WIND DIRECTION 260 240 270 310 180 280 260 190 240 260 210 250 260 FASTEST WIND SPEED (KNOTS) 39 33 27 17 33 23 19 17 25 31 29 14 39 DAY 18 5 25 26 7 22 1 24 21 12 24 3 DAYS WITH SKY CLEAR (0-2)/8 19 16 16 7 17 24 31 30 27 27 20 14 248 DAYS WITH P.CLOUDY (3-6)/8 8 5 9 16 10 6 0 1 2 2 9 12 80 DAYS WITH CLOUDY (7-8)/8 4 7 6 7 4 0 0 0 1 2 1 5 37 DAYS WITH VISIBILITY =< 2 KM 7 7 1 2 0 0 0 0 0 3 1 6 27 DURATION OF SUNSHINE HOURS 171.1 124.2 ****** ****** ****** 238.0 350.4 339.6 291.0 272.5 225.8 139.0 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 771.0 768.0 768.8 769.6 771.8 769.3 767.0 769.9 771.7 773.2 772.1 770.2 770.2 MAX. QFE PRESSURE IN HPA 777.3 773.7 775.5 775.1 776.8 773.6 770.8 774.4 777.7 778.9 777.7 773.9 778.9 DAY-HOUR 7- 6 1- 6 3- 6 12- 6 26-18 8- 6 31-21 25- 6 13- 6 27- 6 16- 6 23- 6 MIN. QFE PRESSURE IN HPA 766.3 761.7 762.7 764.4 766.9 766.2 763.5 766.2 767.6 768.1 765.4 765.2 761.7 DAY-HOUR 22- 3 5- 3 17-15 24-12 15-12 14- 0 20-15 8-15 4-15 15-12 25-21 4-12 MEAN QNH PRESSURE IN HPA 1017.8 1013.9 1015.0 1016.0 1018.8 1015.6 1012.7 1016.4 1018.6 1020.4 1019.1 1016.8 1016.8 MAX. QNH PRESSURE IN HPA 1025.6 1021.1 1023.4 1022.8 1025.0 1021.0 1017.5 1022.0 1026.1 1027.6 1026.1 1021.3 1027.6 DAY-HOUR 7- 6 1- 6 3- 6 12- 6 26-18 8- 6 31-21 25- 6 13- 6 27- 6 16- 6 23- 6 MIN. QNH PRESSURE IN HPA 1011.8 1006.1 1007.3 1009.4 1012.6 1011.7 1008.3 1011.7 1013.5 1014.1 1010.7 1010.5 1006.1 DAY-HOUR 22- 3 5- 3 17-15 24-12 15-12 14- 0 20-15 8-15 4-15 15-12 25-21 4-12 MEAN QFF PRESSURE IN HPA 1020.8 1016.1 1013.0 1008.4 1005.2 997.8 990.5 994.5 1001.2 1009.3 1012.3 1022.1 1007.6 MAX. QFF PRESSURE IN HPA 1033.9 1029.4 1027.2 1019.3 1013.2 1008.4 997.4 1000.7 1011.0 1019.1 1022.5 1033.5 1033.9 DAY-HOUR 15- 6 25-18 3- 6 13- 3 2- 6 1- 6 3- 3 11- 3 22- 3 27- 3 16- 3 21- 6 MIN. QFF PRESSURE IN HPA 1009.3 1000.6 1000.1 1000.8 1000.1 990.2 984.0 988.5 992.9 1001.0 1003.4 1007.5 984.0 DAY-HOUR 12- 3 5- 3 26- 0 22- 3 6-21 22- 0 16- 9 8- 9 4-21 12- 0 6-12 4- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 770.7 767.7 768.2 769.2 771.5 769.2 767.0 770.0 771.6 773.0 772.0 770.1 770.0 MAX. QFE PRESSURE IN HPA 775.4 772.1 773.4 773.0 775.3 772.5 769.9 772.9 776.4 777.5 776.9 773.0 777.5 DAY 7 2 3 4 27 9 4 25 13 27 16 29 MIN. QFE PRESSURE IN HPA 766.7 763.1 763.0 764.7 767.7 766.2 764.4 767.9 768.6 769.2 766.1 765.5 763.0 DAY 22 5 26 24 11 14 17 9 5 21 26 12 MEAN QNH PRESSURE IN HPA 1017.4 1013.5 1014.2 1015.4 1018.3 1015.4 1012.6 1016.5 1018.5 1020.2 1019.0 1016.6 1016.5 MAX. QNH PRESSURE IN HPA 1023.2 1019.1 1020.7 1020.2 1023.1 1019.6 1016.3 1020.1 1024.5 1025.9 1025.1 1020.2 1025.9 DAY 7 2 3 4 27 9 4 25 13 27 16 29 MIN. QNH PRESSURE IN HPA 1012.3 1007.8 1007.7 1009.8 1013.6 1011.7 1009.4 1013.8 1014.7 1015.5 1011.6 1010.8 1007.7 DAY 22 5 26 24 11 14 17 9 5 21 26 12 MEAN QFF PRESSURE IN HPA 1019.4 1015.2 1012.1 1007.8 1004.8 998.1 990.7 994.4 1000.8 1008.5 1011.4 1020.9 1007.0 MAX. QFF PRESSURE IN HPA 1027.9 1025.1 1024.6 1018.0 1010.0 1006.8 995.2 997.9 1009.5 1015.7 1018.8 1030.1 1030.1 DAY 7 26 3 13 4 1 4 11 22 27 30 21 MIN. QFF PRESSURE IN HPA 1009.4 1004.7 1000.1 1002.5 1000.9 990.2 985.6 990.4 995.8 1001.0 1005.7 1009.0 985.6 DAY 12 6 26 19 7 22 17 8 5 12 6 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 770.8 767.8 768.6 769.5 771.9 769.6 767.4 770.5 771.9 773.3 772.2 770.1 770.3 MAX. QFE PRESSURE IN HPA 775.8 772.1 774.1 773.7 775.6 773.0 770.2 773.4 777.0 777.7 777.2 772.8 777.7 DAY 7 1 3 12 27 8 29 25 13 27 16 30 MIN. QFE PRESSURE IN HPA 766.3 761.7 763.9 764.8 768.3 766.9 764.5 768.2 768.6 769.2 766.1 765.8 761.7 DAY 22 5 27 24 11 14 17 23 20 13 26 12 MEAN QNH PRESSURE IN HPA 1017.4 1013.7 1014.7 1015.8 1018.9 1016.0 1013.2 1017.1 1018.9 1020.6 1019.3 1016.6 1016.9 MAX. QNH PRESSURE IN HPA 1023.7 1019.1 1021.6 1021.1 1023.5 1020.2 1016.7 1020.7 1025.2 1026.1 1025.5 1020.0 1026.1 DAY 7 1 3 12 27 8 29 25 13 27 16 30 MIN. QNH PRESSURE IN HPA 1011.8 1006.1 1008.8 1009.9 1014.3 1012.6 1009.6 1014.2 1014.7 1015.5 1011.6 1011.2 1006.1 DAY 22 5 27 24 11 14 17 23 20 13 26 12 MEAN QFF PRESSURE IN HPA 1021.5 1016.9 1014.2 1009.6 1006.5 999.6 992.9 997.3 1003.7 1011.7 1014.2 1023.0 1009.3 MAX. QFF PRESSURE IN HPA 1031.5 1028.8 1026.3 1019.3 1010.6 1007.6 997.4 1000.7 1011.0 1019.1 1022.5 1033.2 1033.2 DAY 15 26 3 13 4 1 3 11 22 27 16 21 MIN. QFF PRESSURE IN HPA 1009.3 1000.6 1004.6 1000.8 1000.9 990.7 987.3 993.6 996.2 1003.0 1008.3 1010.1 987.3 DAY 12 5 26 22 7 22 17 8 20 12 24 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 772.0 768.7 769.7 770.2 772.6 770.0 767.7 771.1 772.6 774.2 773.2 771.2 771.1 MAX. QFE PRESSURE IN HPA 777.3 773.7 775.5 775.1 775.8 773.6 770.7 774.4 777.7 778.9 777.7 773.9 778.9 DAY 7 1 3 12 3 8 31 25 13 27 16 23 MIN. QFE PRESSURE IN HPA 767.9 761.9 764.9 765.0 768.8 767.4 764.7 768.7 769.8 770.1 767.1 766.2 761.9 DAY 22 5 27 24 15 14 2 8 20 13 26 4 MEAN QNH PRESSURE IN HPA 1019.0 1014.8 1016.1 1016.7 1019.7 1016.4 1013.6 1017.9 1019.7 1021.8 1020.4 1017.9 1017.8 MAX. QNH PRESSURE IN HPA 1025.6 1021.1 1023.4 1022.8 1023.7 1021.0 1017.3 1022.0 1026.1 1027.6 1026.1 1021.3 1027.6 DAY 7 1 3 12 3 8 31 25 13 27 16 23 MIN. QNH PRESSURE IN HPA 1013.8 1006.3 1010.1 1010.2 1015.0 1013.2 1009.8 1014.8 1016.2 1016.6 1012.8 1011.7 1006.3 DAY 22 5 27 24 15 14 2 8 20 13 26 4 MEAN QFF PRESSURE IN HPA 1022.9 1017.5 1014.2 1008.8 1005.9 997.9 990.8 995.4 1001.8 1010.6 1013.9 1024.0 1008.6 MAX. QFF PRESSURE IN HPA 1033.9 1028.9 1027.2 1018.7 1013.2 1008.4 995.5 999.2 1009.4 1019.1 1021.0 1033.5 1033.9 DAY 15 26 3 12 2 1 4 25 22 27 27 21 MIN. QFF PRESSURE IN HPA 1010.2 1001.5 1004.6 1001.9 1002.1 991.9 985.2 991.1 997.1 1003.0 1008.2 1008.1 985.2 DAY 12 5 17 19 16 22 17 8 5 13 6 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 771.3 768.3 769.4 770.0 772.1 769.4 767.1 770.2 771.8 773.2 772.1 770.4 770.4 MAX. QFE PRESSURE IN HPA 776.9 773.1 775.0 774.6 775.5 773.1 769.9 773.3 776.6 776.9 776.3 773.2 776.9 DAY 7 1 3 12 3 8 29 25 13 27 15 23 MIN. QFE PRESSURE IN HPA 767.7 761.9 765.0 765.0 768.0 767.0 764.1 767.9 769.5 768.9 766.5 765.4 761.9 DAY 12 23 17 24 15 22 2 8 4 15 26 4 MEAN QNH PRESSURE IN HPA 1018.1 1014.4 1015.7 1016.5 1019.1 1015.7 1012.8 1016.8 1018.7 1020.4 1019.1 1016.9 1017.0 MAX. QNH PRESSURE IN HPA 1025.1 1020.3 1022.7 1022.2 1023.4 1020.3 1016.3 1020.6 1024.7 1025.1 1024.4 1020.5 1025.1 DAY 7 1 3 12 3 8 29 25 13 27 15 23 MIN. QNH PRESSURE IN HPA 1013.6 1006.3 1010.2 1010.2 1014.0 1012.7 1009.1 1013.8 1015.8 1015.1 1012.1 1010.7 1006.3 DAY 12 23 17 24 15 22 2 8 4 15 26 4 MEAN QFF PRESSURE IN HPA 1020.2 1015.3 1012.8 1008.3 1004.7 996.7 989.4 993.5 999.7 1007.7 1010.8 1021.4 1006.7 MAX. QFF PRESSURE IN HPA 1029.6 1025.2 1024.2 1017.8 1010.2 1005.9 993.9 997.3 1006.2 1015.2 1018.2 1029.9 1029.9 DAY 15 26 3 12 2 1 7 25 22 27 30 21 MIN. QFF PRESSURE IN HPA 1010.2 1001.5 1004.2 1002.0 1001.7 992.7 984.0 988.5 994.0 1002.8 1005.1 1007.5 984.0 DAY 12 5 17 24 16 30 16 8 4 13 6 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 770.3 767.4 768.4 769.3 771.2 768.9 766.3 769.1 770.9 772.4 771.3 769.3 769.6 MAX. QFE PRESSURE IN HPA 775.7 772.3 773.5 773.7 775.0 772.1 769.3 771.7 775.3 775.8 775.8 772.1 775.8 DAY 7 1 3 11 3 1 4 25 13 25 15 23 MIN. QFE PRESSURE IN HPA 766.4 761.7 763.7 764.4 766.9 766.6 764.0 766.7 768.0 768.1 766.7 765.2 761.7 DAY 25 23 17 24 15 22 20 8 20 15 26 4 MEAN QNH PRESSURE IN HPA 1016.9 1013.2 1014.4 1015.6 1018.0 1015.1 1011.8 1015.3 1017.5 1019.4 1018.1 1015.6 1015.9 MAX. QNH PRESSURE IN HPA 1023.6 1019.3 1020.8 1021.1 1022.7 1019.1 1015.6 1018.6 1023.1 1023.7 1023.7 1019.1 1023.7 DAY 7 1 3 11 3 1 4 25 13 25 15 23 MIN. QNH PRESSURE IN HPA 1012.0 1006.1 1008.6 1009.4 1012.6 1012.2 1008.9 1012.3 1014.0 1014.1 1012.3 1010.5 1006.1 DAY 25 23 17 24 15 22 20 8 20 15 26 4 MEAN QFF PRESSURE IN HPA 1018.8 1014.9 1012.2 1007.9 1004.5 997.6 989.9 993.2 999.9 1007.9 1010.6 1019.8 1006.4 MAX. QFF PRESSURE IN HPA 1027.5 1023.1 1022.6 1017.5 1008.9 1007.2 994.7 996.2 1004.9 1015.5 1018.5 1028.4 1028.4 DAY 7 25 2 12 30 1 4 11 12 24 30 20 MIN. QFF PRESSURE IN HPA 1009.5 1005.2 1002.5 1003.4 1000.4 991.7 984.9 989.1 994.3 1002.6 1003.4 1008.1 984.9 DAY 11 5 17 24 15 22 16 8 1 13 6 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 770.7 767.6 768.3 769.3 771.2 768.8 766.1 768.8 771.1 772.7 771.8 769.9 769.7 MAX. QFE PRESSURE IN HPA 775.9 772.7 772.7 773.2 774.8 772.5 769.1 771.5 775.5 776.4 776.5 772.9 776.5 DAY 7 1 3 11 20 8 4 25 12 26 15 23 MIN. QFE PRESSURE IN HPA 767.0 762.3 762.7 764.7 767.1 766.5 763.5 766.2 767.6 768.6 766.5 766.7 762.3 DAY 25 23 17 24 15 17 20 8 4 14 25 12 MEAN QNH PRESSURE IN HPA 1017.4 1013.5 1014.3 1015.6 1018.0 1015.0 1011.6 1015.0 1017.8 1019.8 1018.7 1016.4 1016.1 MAX. QNH PRESSURE IN HPA 1023.9 1019.8 1019.8 1020.5 1022.5 1019.6 1015.3 1018.3 1023.4 1024.5 1024.6 1020.1 1024.6 DAY 7 1 3 11 20 8 4 25 12 26 15 23 MIN. QNH PRESSURE IN HPA 1012.7 1006.8 1007.3 1009.8 1012.8 1012.1 1008.3 1011.7 1013.5 1014.7 1012.1 1012.3 1006.8 DAY 25 23 17 24 15 17 20 8 4 14 25 12 MEAN QFF PRESSURE IN HPA 1021.4 1016.7 1013.6 1009.2 1005.6 998.5 991.3 995.1 1002.7 1010.9 1013.7 1022.8 1008.5 MAX. QFF PRESSURE IN HPA 1030.9 1026.7 1024.0 1017.3 1010.3 1005.9 996.3 999.0 1008.0 1018.3 1021.3 1032.4 1032.4 DAY 7 25 2 12 1 2 4 11 12 24 30 20 MIN. QFF PRESSURE IN HPA 1010.4 1004.1 1001.1 1001.3 1001.7 993.1 986.0 990.5 996.2 1004.9 1008.7 1011.9 986.0 DAY 11 5 17 21 16 22 20 8 4 13 11 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 771.4 768.3 769.0 769.9 772.3 769.5 767.0 769.8 772.0 773.4 772.4 770.6 770.4 MAX. QFE PRESSURE IN HPA 776.1 773.4 773.3 773.1 776.8 773.5 770.2 772.3 776.4 777.3 776.8 773.8 777.3 DAY 7 1 2 11 26 2 31 24 12 26 15 23 MIN. QFE PRESSURE IN HPA 767.7 762.5 763.8 765.0 768.2 767.1 764.0 767.0 768.4 769.4 765.8 767.2 762.5 DAY 21 23 26 23 10 13 16 8 4 14 25 11 MEAN QNH PRESSURE IN HPA 1018.2 1014.3 1015.2 1016.3 1019.3 1015.9 1012.7 1016.2 1018.9 1020.8 1019.4 1017.2 1017.0 MAX. QNH PRESSURE IN HPA 1024.1 1020.7 1020.6 1020.3 1025.0 1020.8 1016.7 1019.3 1024.5 1025.6 1025.0 1021.2 1025.6 DAY 7 1 2 11 26 2 31 24 12 26 15 23 MIN. QNH PRESSURE IN HPA 1013.6 1007.1 1008.7 1010.2 1014.2 1012.8 1008.9 1012.7 1014.5 1015.7 1011.2 1013.0 1007.1 DAY 21 23 26 23 10 13 16 8 4 14 25 11 MEAN QFF PRESSURE IN HPA 1022.1 1017.1 1013.1 1008.3 1005.5 997.4 990.0 994.0 1001.2 1009.7 1013.0 1023.3 1007.9 MAX. QFF PRESSURE IN HPA 1031.2 1029.4 1025.4 1017.0 1011.0 1006.4 994.7 997.5 1006.7 1016.7 1020.5 1032.8 1032.8 DAY 6 25 2 12 26 2 3 24 21 26 29 20 MIN. QFF PRESSURE IN HPA 1010.1 1005.8 1003.0 1003.6 1000.4 992.7 984.4 989.2 994.7 1003.0 1007.1 1012.4 984.4 DAY 11 5 17 23 5 21 16 8 4 12 5 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 771.1 768.1 768.9 769.7 772.0 769.4 767.3 770.1 771.9 773.3 772.2 770.4 770.4 MAX. QFE PRESSURE IN HPA 775.2 772.9 773.5 773.3 776.4 773.4 770.8 772.9 776.4 777.5 776.9 773.4 777.5 DAY 6 1 2 12 26 1 31 24 12 26 15 23 MIN. QFE PRESSURE IN HPA 767.0 762.9 763.5 764.9 767.9 766.7 764.4 767.7 768.6 769.0 765.4 766.2 762.9 DAY 21 23 26 23 10 13 16 3 4 15 25 5 MEAN QNH PRESSURE IN HPA 1017.9 1014.1 1015.1 1016.1 1019.0 1015.8 1013.1 1016.6 1018.8 1020.6 1019.2 1017.0 1016.9 MAX. QNH PRESSURE IN HPA 1023.0 1020.1 1020.8 1020.6 1024.5 1020.7 1017.5 1020.1 1024.5 1025.9 1025.1 1020.7 1025.9 DAY 6 1 2 12 26 1 31 24 12 26 15 23 MIN. QNH PRESSURE IN HPA 1012.7 1007.6 1008.3 1010.1 1013.8 1012.3 1009.4 1013.6 1014.7 1015.2 1010.7 1011.7 1007.6 DAY 21 23 26 23 10 13 16 3 4 15 25 5 MEAN QFF PRESSURE IN HPA 1020.1 1015.1 1012.0 1007.8 1004.7 996.6 989.5 993.3 1000.0 1008.0 1010.9 1021.6 1006.7 MAX. QFF PRESSURE IN HPA 1027.5 1026.7 1023.8 1018.1 1010.4 1005.8 994.7 997.5 1007.8 1015.8 1017.7 1029.3 1029.3 DAY 14 25 2 12 26 1 3 10 21 26 29 20 MIN. QFF PRESSURE IN HPA 1010.0 1004.6 1003.0 1003.2 1000.1 991.5 984.7 988.6 992.9 1003.2 1006.0 1009.6 984.7 DAY 11 4 25 18 6 21 16 7 4 12 7 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -7.1 -0.9 0.3 6.3 14.6 19.8 21.2 21.8 18.7 11.8 5.6 0.3 9.4 MINIMUN AIR TEMPERATURE (C) -12.7 -6.3 -4.1 1.6 7.4 10.9 13.6 13.3 9.6 4.3 -0.5 -6.5 2.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 26 18 14 1 0 0 0 0 0 0 4 21 84 DAYS WITH FREEZING MIN.<= 0 29 28 27 9 0 0 0 0 0 3 16 31 143 TEMPERATURE RECORDS LOWEST(C) -29.4 -16.8 -10.6 -4.6 4.4 5.4 11.0 10.8 6.2 -1.2 -5.6 -15.4 -29.4 DAY 16 24 6 4 12 7 7 25 21 17 13 24 MAXIMUM AIR TEMPERATURE (C) -0.9 4.6 5.4 10.7 20.6 26.4 27.8 29.0 26.5 18.9 12.1 7.0 15.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 1 5 0 0 0 0 6 DAYS WITH MAXIMUM TEMP. <= 0 17 1 0 0 0 0 0 0 0 0 0 0 18 TEMPERATURE RECORDS HIGHEST(C) 8.4 10.6 9.4 17.8 26.6 28.6 30.2 31.8 29.6 26.6 20.2 15.8 31.8 DAY 31 9 30 30 31 3 31 22 10 1 5 5 DIF. BETWEEN (MAX.-MIN.) (C) 11.8 10.9 9.5 9.1 13.2 15.5 14.2 15.7 16.9 14.6 12.6 13.5 13.2 MEAN DAILY TEMP. (MDT) (C) -6.8 -0.8 0.6 6.2 14.0 18.7 20.7 21.2 18.1 11.6 5.8 0.2 9.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.6 11.7 16.9 0.0 0.0 0.0 0.0 30.2 HEATING DEG. DAYS(BASE 18 0C) 767.9 546.6 538.9 355.2 123.9 9.6 0.1 0.0 19.1 198.2 365.8 550.3 3475.5 DEWPOINT (MEAN C) -10.5 -5.3 -4.2 -2.2 1.2 -0.4 3.2 0.4 -4.5 -4.8 -5.1 -7.8 -3.4 MIXING RATIO (G/KG) 2.49 3.54 3.87 4.39 5.49 5.08 6.35 5.29 3.75 3.65 3.63 2.94 4.21 VAPOUR PRESSURE (HPA) 3.06 4.34 4.73 5.40 6.75 6.23 7.79 6.50 4.62 4.51 4.49 3.63 5.17 SATURATION DEF. (HPA) 1.04 1.65 1.71 4.47 10.58 17.85 18.23 20.67 18.06 10.08 4.99 3.02 9.36 RELATIVE HUMIDITY (MEAN %) 79 75 74 59 43 28 32 27 24 36 53 60 49 RELATIVE HUMIDITY (MAX. %) 92 92 90 78 68 50 51 45 46 61 75 84 69 RELATIVE HUMIDITY (MIN. %) 62 54 55 39 27 17 21 15 11 17 34 37 32 RELATIVE HUMIDITY (MEAN% 03UTC) 86 80 79 70 66 49 51 44 44 56 72 74 64 RELATIVE HUMIDITY (MEAN% 09UTC) 73 66 66 51 30 20 23 17 13 21 42 47 39 RELATIVE HUMIDITY (MEAN% 15UTC) 75 76 73 52 34 19 25 20 16 29 41 54 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 229.4 325.8 486.1 218.0 24.5 0.0 0.2 0.1 1.0 18.1 20.5 178.1 1501.8 DAYS WITH PRECIPITATION >=10 4 10 11 6 0 0 0 0 0 0 0 5 36 DAYS WITH PRECIPITATION >= 5 8 13 16 9 2 0 0 0 0 2 3 6 59 DAYS WITH PRECIPITATION >= 1 11 14 16 11 6 0 0 0 1 5 5 7 76 DAYS WITH PRECIPITATION 13 19 20 17 10 0 3 1 2 5 7 7 104 GREATEST DAILY PRECIPITATION 72.0 101.0 88.0 60.0 9.5 0.0 0.2 0.1 1.0 8.0 7.0 68.0 101.0 DAY 6 2 2 13 21 ** 5 31 1 15 21 22 DAY WITH THUNDER STORM 1 5 12 7 5 0 0 1 0 3 0 3 37 DAYS WITH SNOW OR SLEET 13 18 22 3 0 0 0 0 0 0 2 7 65 DAYS WITH DUST 1 1 1 0 0 0 0 0 4 0 0 0 7 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 13.2 14.6 12.8 10.1 8.2 10.0 7.8 9.6 8.4 11.0 9.9 10.8 10.3 PREVAILING WIND PERCENT 7.7 13.4 16.1 33.3 27.8 18.8 5.2 14.9 22.9 21.0 10.0 8.9 16.6 CALMS PERCENT OF WIND 80.2 69.8 63.7 45.0 54.4 63.3 79.4 67.3 55.4 53.2 80.4 78.6 65.9 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 261 260 243 257 272 269 163 249 265 263 267 264 260 VECTOR WIND MAGNITUDE(KNOTS) 1.6 3.1 3.7 4.7 3.1 2.6 0.2 1.5 3.3 3.1 1.4 1.6 2.5 WIND STEADINESES (MEAN %) 76.2 79.5 78.7 78.3 79.5 70.3 11.8 46.9 76.7 63.3 73.7 72.7 71.4 WIND SPEED (MEAN KNOTS) 2.1 3.9 4.7 6.0 3.9 3.7 1.7 3.2 4.3 4.9 1.9 2.2 3.5 FASTEST WIND DIRECTION 260 240 190 300 310 300 300 290 280 270 210 240 260 FASTEST WIND SPEED (KNOTS) 39 29 33 29 19 19 19 29 23 23 19 29 39 DAY 6 1 7 24 1 26 7 28 22 9 1 29 DAYS WITH SKY CLEAR (0-2)/8 10 9 8 12 16 28 19 27 29 26 15 17 216 DAYS WITH P.CLOUDY (3-6)/8 13 13 12 13 11 1 10 4 1 4 8 9 99 DAYS WITH CLOUDY (7-8)/8 8 7 11 5 4 1 2 0 0 1 7 5 51 DAYS WITH VISIBILITY =< 2 KM 9 8 12 1 2 0 0 0 0 0 1 4 37 DURATION OF SUNSHINE HOURS 127.6 158.1 153.3 240.1 312.1 355.6 294.1 322.3 289.9 270.4 173.8 163.3 2860.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 768.4 767.5 766.1 770.2 772.0 769.8 770.4 770.9 771.6 773.4 773.4 772.7 770.5 MAX. QFE PRESSURE IN HPA 774.4 775.0 772.5 774.6 776.8 774.6 776.0 775.9 777.9 779.1 779.8 778.1 779.8 DAY-HOUR 26- 6 8-18 29-18 30- 6 17- 6 3- 6 4- 3 30-18 25- 6 2- 6 18- 6 28- 6 MIN. QFE PRESSURE IN HPA 759.8 757.0 761.0 765.6 769.2 765.2 765.4 766.6 765.8 767.8 768.1 766.0 757.0 DAY-HOUR 12-12 5- 3 7-12 3- 3 29- 0 19-15 6-12 7-12 21-12 5-12 28-12 15- 0 MEAN QNH PRESSURE IN HPA 1014.5 1013.4 1011.6 1016.8 1019.0 1016.2 1016.9 1017.6 1018.5 1020.7 1020.7 1019.8 1017.1 MAX. QNH PRESSURE IN HPA 1022.0 1022.7 1019.6 1022.2 1025.0 1022.2 1024.0 1023.9 1026.4 1027.9 1028.7 1026.6 1028.7 DAY-HOUR 26- 6 8-18 29-18 30- 6 17- 6 3- 6 4- 3 30-18 25- 6 2- 6 18- 6 28- 6 MIN. QNH PRESSURE IN HPA 1003.7 1000.2 1005.2 1011.0 1015.5 1010.5 1010.7 1012.2 1011.2 1013.7 1014.1 1011.5 1000.2 DAY-HOUR 12-12 5- 3 7-12 3- 3 29- 0 19-15 6-12 7-12 21-12 5-12 28-12 15- 0 MEAN QFF PRESSURE IN HPA 1021.8 1013.8 1010.7 1010.2 1004.6 997.1 996.5 996.8 1000.7 1009.2 1015.0 1019.5 1008.0 MAX. QFF PRESSURE IN HPA 1042.8 1029.3 1022.9 1018.6 1010.4 1005.0 1004.3 1007.2 1011.3 1018.9 1027.1 1033.0 1042.8 DAY-HOUR 26- 3 24- 3 29-15 7- 6 3- 3 8- 3 4- 3 31- 3 26- 3 19- 3 19- 6 28-18 MIN. QFF PRESSURE IN HPA 1004.1 999.4 1000.9 1001.7 996.9 991.2 989.2 990.0 993.4 998.4 1005.8 1006.4 989.2 DAY-HOUR 6-12 5- 0 7- 9 25- 0 29- 0 19- 6 6- 9 7-21 20- 9 5- 9 2-21 15- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 768.1 766.9 765.7 769.7 771.8 769.6 770.4 770.8 771.5 773.2 773.3 772.4 770.3 MAX. QFE PRESSURE IN HPA 773.6 773.0 771.9 773.5 775.2 773.1 775.5 775.1 776.4 778.0 778.5 776.2 778.5 DAY 26 9 30 9 18 3 4 30 26 2 19 28 MIN. QFE PRESSURE IN HPA 761.7 757.6 761.0 765.9 769.2 766.5 765.8 767.1 766.5 768.8 769.3 766.0 757.6 DAY 13 5 13 15 29 19 7 8 21 6 28 15 MEAN QNH PRESSURE IN HPA 1014.1 1012.6 1011.1 1016.1 1018.7 1015.9 1016.9 1017.5 1018.3 1020.5 1020.6 1019.5 1016.8 MAX. QNH PRESSURE IN HPA 1021.0 1020.2 1018.8 1020.8 1023.0 1020.3 1023.4 1022.8 1024.5 1026.5 1027.1 1024.2 1027.1 DAY 26 9 30 9 18 3 4 30 26 2 19 28 MIN. QNH PRESSURE IN HPA 1006.1 1000.9 1005.2 1011.3 1015.5 1012.1 1011.2 1012.8 1012.1 1015.0 1015.6 1011.5 1000.9 DAY 13 5 13 15 29 19 7 8 21 6 28 15 MEAN QFF PRESSURE IN HPA 1020.4 1012.5 1009.9 1009.4 1004.6 997.3 996.6 996.4 1000.2 1008.4 1014.0 1018.0 1007.3 MAX. QFF PRESSURE IN HPA 1039.0 1024.7 1021.0 1016.4 1009.2 1004.0 1003.1 1004.3 1007.9 1014.9 1023.1 1025.1 1039.0 DAY 26 24 29 7 12 8 4 30 26 20 19 24 MIN. QFF PRESSURE IN HPA 1007.7 999.4 1002.8 1001.7 996.9 993.2 991.9 991.2 994.9 1000.6 1007.6 1006.4 991.2 DAY 19 5 19 25 29 19 7 8 22 6 3 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 768.2 767.1 765.9 770.0 772.2 770.1 770.9 771.5 772.0 773.6 773.6 772.6 770.6 MAX. QFE PRESSURE IN HPA 773.3 772.7 771.9 773.8 775.5 774.0 776.0 775.1 776.9 778.6 778.8 776.6 778.8 DAY 26 8 30 30 17 3 4 30 26 2 19 28 MIN. QFE PRESSURE IN HPA 761.2 757.0 761.0 765.6 769.2 766.9 766.6 767.9 766.8 769.1 769.0 767.8 757.0 DAY 12 5 13 3 29 19 7 8 21 6 29 15 MEAN QNH PRESSURE IN HPA 1014.2 1012.9 1011.3 1016.4 1019.2 1016.5 1017.6 1018.3 1018.9 1021.0 1020.9 1019.7 1017.3 MAX. QNH PRESSURE IN HPA 1020.6 1019.8 1018.8 1021.2 1023.4 1021.5 1024.0 1022.8 1025.1 1027.2 1027.5 1024.7 1027.5 DAY 26 8 30 30 17 3 4 30 26 2 19 28 MIN. QNH PRESSURE IN HPA 1005.4 1000.2 1005.2 1011.0 1015.5 1012.6 1012.2 1013.8 1012.5 1015.3 1015.2 1013.7 1000.2 DAY 12 5 13 3 29 19 7 8 21 6 29 15 MEAN QFF PRESSURE IN HPA 1022.6 1014.3 1011.6 1010.8 1006.2 998.8 998.6 999.5 1003.5 1011.6 1016.7 1020.6 1009.6 MAX. QFF PRESSURE IN HPA 1042.8 1029.3 1022.8 1018.3 1010.4 1005.0 1004.3 1007.2 1011.3 1018.9 1026.6 1027.6 1042.8 DAY 26 24 29 7 3 8 4 31 26 19 19 28 MIN. QFF PRESSURE IN HPA 1008.1 999.8 1002.9 1003.4 998.2 994.3 993.6 994.9 996.4 1004.5 1009.9 1012.7 993.6 DAY 6 5 19 25 29 6 7 8 22 15 3 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 769.3 768.3 766.8 771.0 772.7 770.4 771.3 772.0 772.6 774.4 774.4 773.6 771.4 MAX. QFE PRESSURE IN HPA 774.4 774.5 772.4 774.6 776.8 774.6 775.8 775.6 777.9 779.1 779.8 778.1 779.8 DAY 26 8 30 30 17 3 3 30 25 2 18 28 MIN. QFE PRESSURE IN HPA 761.5 758.4 761.8 766.6 769.6 766.4 766.9 768.0 767.6 770.0 770.1 769.3 758.4 DAY 12 5 13 3 29 19 7 8 20 5 29 15 MEAN QNH PRESSURE IN HPA 1015.5 1014.4 1012.5 1017.7 1019.8 1017.0 1018.1 1018.9 1019.7 1022.0 1022.0 1021.0 1018.2 MAX. QNH PRESSURE IN HPA 1022.0 1022.1 1019.5 1022.2 1025.0 1022.2 1023.7 1023.5 1026.4 1027.9 1028.7 1026.6 1028.7 DAY 26 8 30 30 17 3 3 30 25 2 18 28 MIN. QNH PRESSURE IN HPA 1005.8 1001.9 1006.2 1012.2 1016.0 1012.0 1012.6 1014.0 1013.5 1016.5 1016.6 1015.6 1001.9 DAY 12 5 13 3 29 19 7 8 20 5 29 15 MEAN QFF PRESSURE IN HPA 1024.2 1015.2 1011.9 1011.0 1004.6 996.8 996.9 997.6 1001.4 1010.2 1016.6 1021.3 1009.0 MAX. QFF PRESSURE IN HPA 1042.4 1029.1 1021.5 1018.6 1009.6 1002.7 1001.8 1004.7 1009.6 1017.5 1027.1 1032.9 1042.4 DAY 26 24 6 7 8 3 4 30 25 19 19 28 MIN. QFF PRESSURE IN HPA 1010.8 1002.6 1004.3 1004.6 997.9 991.2 991.8 992.1 996.5 1001.4 1008.6 1013.3 991.2 DAY 6 5 13 18 29 19 6 8 20 5 3 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 768.7 768.2 766.5 770.7 772.3 769.9 770.6 770.9 771.6 773.4 773.3 772.9 770.7 MAX. QFE PRESSURE IN HPA 773.9 774.8 772.2 774.5 776.2 773.8 775.8 774.4 776.9 777.9 778.6 777.4 778.6 DAY 26 8 30 8 17 3 3 30 25 2 18 28 MIN. QFE PRESSURE IN HPA 760.8 760.0 761.2 767.0 769.9 766.4 766.4 767.6 766.2 768.5 769.3 769.2 760.0 DAY 12 5 7 3 29 19 6 8 20 5 28 15 MEAN QNH PRESSURE IN HPA 1014.8 1014.2 1012.1 1017.4 1019.3 1016.4 1017.2 1017.6 1018.5 1020.7 1020.6 1020.1 1017.4 MAX. QNH PRESSURE IN HPA 1021.3 1022.5 1019.2 1022.1 1024.2 1021.2 1023.7 1022.0 1025.1 1026.4 1027.2 1025.7 1027.2 DAY 26 8 30 8 17 3 3 30 25 2 18 28 MIN. QNH PRESSURE IN HPA 1004.9 1003.9 1005.4 1012.7 1016.3 1012.0 1012.0 1013.5 1011.7 1014.6 1015.6 1015.5 1003.9 DAY 12 5 7 3 29 19 6 8 20 5 28 15 MEAN QFF PRESSURE IN HPA 1020.9 1013.8 1010.1 1010.3 1004.0 996.4 995.8 995.4 999.0 1007.7 1013.6 1018.6 1007.1 MAX. QFF PRESSURE IN HPA 1039.4 1026.7 1019.6 1017.2 1008.8 1001.6 1001.0 1002.7 1007.4 1014.3 1022.9 1028.4 1039.4 DAY 26 24 29 7 3 7 3 30 25 20 19 28 MIN. QFF PRESSURE IN HPA 1005.4 1004.9 1000.9 1003.9 998.5 992.1 989.2 990.4 993.4 998.4 1007.5 1012.0 989.2 DAY 6 5 7 18 29 19 6 8 20 5 2 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 767.8 767.2 765.7 770.0 771.6 769.3 769.6 770.0 770.8 772.5 772.3 772.0 769.9 MAX. QFE PRESSURE IN HPA 772.8 774.1 771.2 774.1 775.5 773.2 775.0 773.7 775.3 776.0 777.4 777.0 777.4 DAY 26 8 30 8 17 3 3 29 25 2 18 28 MIN. QFE PRESSURE IN HPA 759.8 760.4 761.0 766.8 769.4 765.8 765.4 766.6 765.8 767.8 768.1 769.2 759.8 DAY 12 5 7 10 29 19 6 7 21 5 28 15 MEAN QNH PRESSURE IN HPA 1013.7 1013.0 1011.1 1016.5 1018.5 1015.6 1016.0 1016.4 1017.4 1019.6 1019.4 1018.9 1016.3 MAX. QNH PRESSURE IN HPA 1020.0 1021.6 1018.0 1021.6 1023.4 1020.5 1022.7 1021.1 1023.1 1024.0 1025.7 1025.2 1025.7 DAY 26 8 30 8 17 3 3 29 25 2 18 28 MIN. QNH PRESSURE IN HPA 1003.7 1004.4 1005.2 1012.5 1015.7 1011.2 1010.7 1012.2 1011.2 1013.7 1014.1 1015.5 1003.7 DAY 12 5 7 10 29 19 6 7 21 5 28 15 MEAN QFF PRESSURE IN HPA 1019.9 1012.7 1009.7 1009.7 1004.3 997.0 995.6 995.5 999.4 1007.5 1013.0 1017.5 1006.8 MAX. QFF PRESSURE IN HPA 1037.2 1025.1 1019.3 1016.5 1008.8 1003.8 1001.6 1001.9 1006.7 1012.8 1020.9 1027.1 1037.2 DAY 26 24 29 8 7 7 3 29 25 17 19 28 MIN. QFF PRESSURE IN HPA 1004.1 1005.1 1001.2 1003.9 998.6 993.3 990.0 991.1 994.4 999.0 1008.6 1011.4 990.0 DAY 6 5 7 10 29 19 6 7 19 5 2 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 768.2 767.3 765.8 769.8 771.4 769.1 769.3 770.0 771.0 772.8 772.9 772.5 770.0 MAX. QFE PRESSURE IN HPA 772.8 774.4 771.5 773.8 775.1 772.8 774.3 774.4 775.9 776.5 778.1 776.9 778.1 DAY 2 8 29 23 17 3 3 30 25 2 18 28 MIN. QFE PRESSURE IN HPA 760.2 761.1 761.0 766.7 769.5 765.2 765.4 766.6 766.2 768.2 768.6 769.4 760.2 DAY 12 5 7 10 29 19 6 7 20 5 28 15 MEAN QNH PRESSURE IN HPA 1014.2 1013.1 1011.2 1016.2 1018.2 1015.4 1015.5 1016.4 1017.7 1020.0 1020.1 1019.6 1016.5 MAX. QNH PRESSURE IN HPA 1020.0 1022.0 1018.3 1021.2 1022.8 1020.0 1021.9 1022.0 1023.9 1024.6 1026.6 1025.1 1026.6 DAY 2 8 29 23 17 3 3 30 25 2 18 28 MIN. QNH PRESSURE IN HPA 1004.2 1005.3 1005.2 1012.3 1015.8 1010.5 1010.7 1012.2 1011.7 1014.2 1014.7 1015.7 1004.2 DAY 12 5 7 10 29 19 6 7 20 5 28 15 MEAN QFF PRESSURE IN HPA 1022.5 1014.4 1011.3 1010.5 1005.2 997.8 996.5 997.7 1002.4 1010.7 1016.0 1020.6 1008.8 MAX. QFF PRESSURE IN HPA 1041.5 1028.2 1022.9 1017.0 1009.6 1004.8 1002.0 1006.4 1009.6 1016.5 1024.8 1031.4 1041.5 DAY 25 24 29 7 3 7 3 30 25 18 18 28 MIN. QFF PRESSURE IN HPA 1009.7 1004.5 1001.1 1005.1 999.8 993.2 991.7 993.0 998.2 1003.7 1010.8 1014.1 991.7 DAY 6 10 3 10 29 19 6 7 19 5 28 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 768.8 767.8 766.4 770.5 772.3 769.8 770.4 771.1 771.9 773.7 773.6 773.0 770.8 MAX. QFE PRESSURE IN HPA 773.7 775.0 772.5 773.8 775.8 773.3 775.3 775.9 776.7 778.1 779.3 776.8 779.3 DAY 2 8 29 7 17 3 3 30 25 2 18 28 MIN. QFE PRESSURE IN HPA 760.9 761.4 761.7 767.5 769.9 766.3 766.4 767.6 767.2 769.0 769.6 769.7 760.9 DAY 12 4 12 10 29 19 6 7 20 5 28 14 MEAN QNH PRESSURE IN HPA 1015.0 1013.7 1012.0 1017.1 1019.3 1016.3 1017.0 1017.9 1018.9 1021.0 1021.0 1020.2 1017.4 MAX. QNH PRESSURE IN HPA 1021.1 1022.7 1019.6 1021.2 1023.7 1020.6 1023.1 1023.9 1024.9 1026.6 1028.1 1025.0 1028.1 DAY 2 8 29 7 17 3 3 30 25 2 18 28 MIN. QNH PRESSURE IN HPA 1005.1 1005.7 1006.1 1013.3 1016.3 1011.8 1012.0 1013.5 1013.0 1015.2 1016.0 1016.1 1005.1 DAY 12 4 12 10 29 19 6 7 20 5 28 14 MEAN QFF PRESSURE IN HPA 1023.7 1014.5 1011.3 1010.2 1004.1 996.4 996.0 996.7 1000.7 1009.4 1015.7 1020.6 1008.3 MAX. QFF PRESSURE IN HPA 1042.4 1026.8 1021.7 1017.3 1008.9 1001.9 1001.8 1005.6 1007.9 1015.5 1026.2 1033.0 1042.4 DAY 25 24 29 6 6 7 3 30 25 19 18 28 MIN. QFF PRESSURE IN HPA 1010.9 1004.2 1003.1 1006.4 998.6 991.9 991.0 992.1 995.9 1001.0 1009.8 1013.0 991.0 DAY 18 10 3 9 28 19 6 7 19 5 7 29 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 768.5 767.5 766.3 770.3 772.3 770.0 770.7 771.2 771.9 773.5 773.6 772.7 770.7 MAX. QFE PRESSURE IN HPA 773.6 774.0 772.5 774.0 775.8 773.6 775.5 775.3 776.2 778.0 779.3 776.2 779.3 DAY 25 8 29 8 17 2 3 29 25 1 18 27 MIN. QFE PRESSURE IN HPA 761.3 759.8 761.6 767.0 769.9 767.0 766.2 767.4 766.7 769.2 769.6 767.0 759.8 DAY 12 4 12 14 29 19 6 7 20 5 28 14 MEAN QNH PRESSURE IN HPA 1014.6 1013.3 1011.8 1016.9 1019.3 1016.4 1017.3 1017.9 1018.8 1020.9 1020.9 1019.8 1017.3 MAX. QNH PRESSURE IN HPA 1021.0 1021.5 1019.6 1021.5 1023.7 1021.0 1023.4 1023.1 1024.2 1026.5 1028.1 1024.2 1028.1 DAY 25 8 29 8 17 2 3 29 25 1 18 27 MIN. QNH PRESSURE IN HPA 1005.6 1003.7 1005.9 1012.7 1016.3 1012.7 1011.7 1013.2 1012.3 1015.5 1016.0 1012.7 1003.7 DAY 12 4 12 14 29 19 6 7 20 5 28 14 MEAN QFF PRESSURE IN HPA 1020.7 1012.9 1009.8 1009.7 1003.9 996.4 996.0 995.8 999.2 1007.9 1014.1 1018.5 1007.1 MAX. QFF PRESSURE IN HPA 1039.2 1023.7 1019.8 1018.0 1008.5 1001.9 1001.3 1003.4 1006.2 1014.7 1023.8 1027.1 1039.2 DAY 25 24 29 6 6 7 3 30 24 19 18 28 MIN. QFF PRESSURE IN HPA 1008.8 1001.7 1002.0 1003.7 997.3 992.2 990.5 990.0 994.0 998.6 1005.8 1009.7 990.0 DAY 18 4 22 24 28 18 6 7 19 5 2 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.3 -4.4 -0.6 4.8 13.1 18.7 23.4 23.4 17.8 12.2 3.9 -2.2 8.7 MINIMUN AIR TEMPERATURE (C) -10.8 -10.6 -4.8 -0.3 6.7 10.5 14.3 13.9 8.8 5.4 -0.4 -8.6 2.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 27 22 18 7 0 0 0 0 0 0 3 22 99 DAYS WITH FREEZING MIN.<= 0 30 27 29 11 1 0 0 0 0 1 15 30 144 TEMPERATURE RECORDS LOWEST(C) -26.4 -22.6 -11.8 -11.4 -1.4 5.8 9.8 10.6 5.4 0.0 -4.6 -20.0 -26.4 DAY 20 8 31 12 6 4 7 30 15 27 29 22 MAXIMUM AIR TEMPERATURE (C) 1.2 1.9 4.2 9.9 18.8 25.5 31.1 31.4 25.0 18.8 8.8 3.6 15.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 24 28 0 0 0 0 52 DAYS WITH MAXIMUM TEMP. <= 0 12 8 0 1 0 0 0 0 0 0 0 6 27 TEMPERATURE RECORDS HIGHEST(C) 6.8 9.4 9.0 19.2 24.2 28.4 34.6 33.4 28.6 22.8 12.6 9.6 34.6 DAY 1 21 2 27 27 28 28 16 5 6 5 8 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 12.5 9.0 10.2 12.1 15.0 16.8 17.5 16.2 13.4 9.2 12.2 13.0 MEAN DAILY TEMP. (MDT) (C) -4.8 -4.4 -0.3 4.8 12.8 18.0 22.7 22.6 16.9 12.1 4.2 -2.5 8.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.9 65.4 52.6 0.0 0.0 0.0 0.0 119.9 HEATING DEG. DAYS(BASE 18 0C) 706.4 626.2 566.8 395.9 162.6 22.8 0.0 0.0 38.8 182.4 413.2 636.7 3751.9 DEWPOINT (MEAN C) -11.4 -14.2 -8.4 -4.7 -0.7 0.0 0.7 -1.0 -3.6 -0.3 -1.6 -8.0 -4.4 MIXING RATIO (G/KG) 2.24 1.84 2.87 3.72 4.86 5.21 5.43 4.71 3.88 4.94 4.51 2.87 3.92 VAPOUR PRESSURE (HPA) 2.76 2.26 3.51 4.57 5.98 6.40 6.64 5.79 4.80 6.11 5.55 3.53 4.83 SATURATION DEF. (HPA) 1.78 2.56 2.49 4.55 9.81 16.07 23.60 24.37 16.50 8.79 2.75 2.06 9.61 RELATIVE HUMIDITY (MEAN %) 65 50 60 53 43 32 25 22 26 47 70 67 47 RELATIVE HUMIDITY (MAX. %) 83 70 81 75 68 55 46 40 45 72 88 84 67 RELATIVE HUMIDITY (MIN. %) 43 32 39 35 25 17 13 12 13 26 50 51 30 RELATIVE HUMIDITY (MEAN% 03UTC) 74 59 64 64 64 54 46 40 44 66 85 80 62 RELATIVE HUMIDITY (MEAN% 09UTC) 59 44 53 44 28 19 15 13 16 29 55 60 36 RELATIVE HUMIDITY (MEAN% 15UTC) 59 43 61 47 34 23 17 15 19 41 64 65 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 141.5 31.7 435.6 166.3 78.2 7.8 0.0 0.0 0.0 32.6 118.7 130.2 1142.6 DAYS WITH PRECIPITATION >=10 5 0 14 7 1 0 0 0 0 1 5 4 37 DAYS WITH PRECIPITATION >= 5 7 2 16 10 2 1 0 0 0 3 8 6 55 DAYS WITH PRECIPITATION >= 1 9 9 22 13 4 1 0 0 0 5 9 9 81 DAYS WITH PRECIPITATION 10 12 23 14 7 3 0 0 0 10 13 12 104 GREATEST DAILY PRECIPITATION 59.0 7.9 64.0 43.0 65.0 7.0 0.0 0.0 0.0 11.0 26.0 41.0 65.0 DAY 16 26 29 5 5 1 ** ** ** 20 3 21 DAY WITH THUNDER STORM 1 0 5 8 5 2 0 0 0 2 4 2 29 DAYS WITH SNOW OR SLEET 10 8 22 8 1 0 0 0 0 0 5 11 65 DAYS WITH DUST 0 1 1 1 0 0 0 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 12.5 12.8 10.1 11.5 8.6 8.7 7.4 8.5 9.2 8.4 7.6 10.5 9.7 PREVAILING WIND PERCENT 12.9 15.6 20.6 26.7 15.3 17.5 12.1 16.9 19.6 18.1 13.8 9.0 16.7 CALMS PERCENT OF WIND 69.8 67.4 59.3 54.2 65.7 66.3 72.2 69.0 55.8 64.1 80.4 71.0 66.1 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 155 2827 VECTOR WIND DIRECTION (MEAN) 269 251 263 258 285 266 254 253 273 276 269 275 266 VECTOR WIND MAGNITUDE(KNOTS) 2.7 3.1 3.3 4.3 2.3 1.8 1.5 1.5 3.0 2.4 1.3 1.9 2.4 WIND STEADINESES (MEAN %) 73.0 83.8 76.7 81.1 76.7 64.3 71.4 57.7 75.0 70.6 81.2 63.3 72.7 WIND SPEED (MEAN KNOTS) 3.7 3.7 4.3 5.3 3.0 2.8 2.1 2.6 4.0 3.4 1.6 3.0 3.3 FASTEST WIND DIRECTION 180 210 300 240 300 270 170 250 220 290 330 240 180 FASTEST WIND SPEED (KNOTS) 39 33 29 33 19 27 19 17 17 25 17 29 39 DAY 27 22 8 8 23 17 8 12 9 3 5 30 DAYS WITH SKY CLEAR (0-2)/8 17 19 8 11 17 20 30 28 30 17 8 19 224 DAYS WITH P.CLOUDY (3-6)/8 6 5 12 14 10 9 1 3 0 11 9 6 86 DAYS WITH CLOUDY (7-8)/8 8 4 11 5 4 1 0 0 0 3 13 6 55 DAYS WITH VISIBILITY =< 2 KM 6 3 14 3 2 0 0 0 0 2 2 6 38 DURATION OF SUNSHINE HOURS 156.1 198.3 164.1 230.1 291.7 322.5 363.8 336.6 311.3 228.2 141.0 139.9 2883.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 768.8 768.2 765.9 769.6 772.2 770.3 767.8 770.4 773.2 774.6 772.1 769.9 770.2 MAX. QFE PRESSURE IN HPA 775.4 775.5 774.9 774.4 776.2 774.5 771.4 774.2 777.9 779.1 779.1 774.6 779.1 DAY-HOUR 7- 6 17- 6 11- 6 14- 6 12- 6 11- 6 28- 6 10- 6 19- 6 9- 6 8- 6 28- 6 MIN. QFE PRESSURE IN HPA 760.0 762.0 756.2 761.7 764.8 764.5 763.8 766.0 769.8 770.3 766.8 763.8 756.2 DAY-HOUR 17-12 1- 0 29- 9 5-12 5- 0 30-12 16- 9 5-12 10-12 24- 0 30-21 10-12 MEAN QNH PRESSURE IN HPA 1015.0 1014.2 1011.3 1015.9 1019.2 1016.8 1013.7 1017.0 1020.5 1022.3 1019.0 1016.4 1016.8 MAX. QNH PRESSURE IN HPA 1023.2 1023.4 1022.6 1022.0 1024.2 1022.1 1018.2 1021.7 1026.4 1027.9 1027.9 1022.2 1027.9 DAY-HOUR 7- 6 17- 6 11- 6 14- 6 12- 6 11- 6 28- 6 10- 6 19- 6 9- 6 8- 6 28- 6 MIN. QNH PRESSURE IN HPA 1003.9 1006.4 999.2 1006.1 1009.9 1009.6 1008.7 1011.5 1016.2 1016.8 1012.5 1008.7 999.2 DAY-HOUR 17-12 1- 0 29- 9 5-12 5- 0 30-12 16- 9 5-12 10-12 24- 0 30-21 10-12 MEAN QFF PRESSURE IN HPA 1020.2 1018.6 1011.3 1010.9 1006.2 998.8 991.5 994.9 1003.5 1010.2 1014.7 ****** ****** MAX. QFF PRESSURE IN HPA 1040.6 1035.0 1025.1 1022.6 1015.8 1006.4 997.0 1002.4 1012.0 1016.6 1022.1 ****** ****** DAY-HOUR 19-18 8- 6 1- 6 14- 3 6- 3 8- 3 7- 3 31-15 19- 3 29- 3 8- 6 **-** MIN. QFF PRESSURE IN HPA 1002.3 1004.8 997.1 1000.1 999.6 988.8 984.6 988.4 996.5 1003.6 1007.6 ****** ****** DAY-HOUR 16- 3 21-21 29- 9 5-15 22- 0 30- 9 16- 9 5- 9 2-21 7- 0 19- 9 **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 768.8 767.4 765.3 768.9 771.8 770.1 767.6 770.3 773.0 774.3 771.9 ****** ****** MAX. QFE PRESSURE IN HPA 774.0 773.2 772.4 772.7 775.3 773.5 770.2 772.8 776.6 778.1 777.6 ****** ****** DAY 7 17 11 24 12 8 29 24 19 9 8 ** MIN. QFE PRESSURE IN HPA 761.1 762.0 759.7 763.2 764.8 765.4 764.0 766.8 770.1 770.3 769.0 ****** ****** DAY 17 1 29 11 5 30 12 6 13 24 13 ** MEAN QNH PRESSURE IN HPA 1014.9 1013.2 1010.6 1015.1 1018.7 1016.6 1013.4 1016.9 1020.2 1021.9 1018.8 ****** ****** MAX. QNH PRESSURE IN HPA 1021.5 1020.5 1019.5 1019.8 1023.1 1020.8 1016.7 1020.0 1024.7 1026.6 1026.0 ****** ****** DAY 7 17 11 24 12 8 29 24 19 9 8 ** MIN. QNH PRESSURE IN HPA 1005.3 1006.4 1003.6 1007.9 1009.9 1010.7 1008.9 1012.5 1016.6 1016.8 1015.2 ****** ****** DAY 17 1 29 11 5 30 12 6 13 24 13 ** MEAN QFF PRESSURE IN HPA 1019.0 1016.6 1010.4 1010.1 1006.0 999.0 991.3 994.6 1003.1 1009.7 1014.2 ****** ****** MAX. QFF PRESSURE IN HPA 1035.2 1029.0 1022.4 1019.7 1013.9 1004.9 995.7 998.5 1008.3 1014.1 1020.5 ****** ****** DAY 20 8 1 13 6 8 7 25 19 29 4 ** MIN. QFF PRESSURE IN HPA 1003.4 1005.0 1001.3 1002.4 999.6 991.0 986.3 990.0 997.1 1003.6 1009.4 ****** ****** DAY 16 22 29 10 22 30 12 5 3 7 19 ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 768.8 767.7 765.5 769.4 772.4 770.7 768.1 771.0 773.5 774.8 772.3 769.7 770.3 MAX. QFE PRESSURE IN HPA 773.8 774.3 773.2 773.4 775.6 774.1 771.0 773.7 777.3 778.4 778.1 773.4 778.4 DAY 7 17 11 24 12 8 29 11 19 9 8 28 MIN. QFE PRESSURE IN HPA 760.4 763.1 757.0 762.9 766.0 766.2 765.1 767.4 770.6 770.9 769.3 763.9 757.0 DAY 16 1 29 10 5 30 12 5 13 24 13 10 MEAN QNH PRESSURE IN HPA 1014.9 1013.6 1010.8 1015.7 1019.5 1017.3 1014.1 1017.7 1020.8 1022.5 1019.3 1016.1 1016.9 MAX. QNH PRESSURE IN HPA 1021.2 1021.9 1020.5 1020.7 1023.5 1021.6 1017.7 1021.1 1025.6 1027.0 1026.6 1020.7 1027.0 DAY 7 17 11 24 12 8 29 11 19 9 8 28 MIN. QNH PRESSURE IN HPA 1004.4 1007.8 1000.2 1007.6 1011.5 1011.7 1010.3 1013.2 1017.2 1017.6 1015.6 1008.8 1000.2 DAY 16 1 29 10 5 30 12 5 13 24 13 10 MEAN QFF PRESSURE IN HPA 1021.1 1019.3 1011.9 1011.7 1007.8 1000.7 993.6 997.8 1006.1 1012.2 1016.2 1020.5 1009.9 MAX. QFF PRESSURE IN HPA 1039.2 1032.2 1024.1 1022.6 1015.8 1006.4 997.0 1002.2 1012.0 1016.6 1020.7 1036.1 1039.2 DAY 20 8 1 14 6 8 7 31 19 29 8 28 MIN. QFF PRESSURE IN HPA 1002.3 1006.7 998.7 1000.9 1001.2 991.8 989.1 992.9 1000.4 1005.5 1011.5 1005.9 989.1 DAY 16 23 29 5 22 30 12 5 3 7 12 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 769.7 769.0 766.5 770.3 772.9 770.9 768.4 771.5 774.0 775.6 773.2 770.9 771.1 MAX. QFE PRESSURE IN HPA 775.4 775.5 774.9 774.4 776.2 774.5 771.4 774.2 777.9 779.1 779.1 774.6 779.1 DAY 7 17 11 14 12 11 28 10 19 9 8 28 MIN. QFE PRESSURE IN HPA 760.4 764.6 756.4 763.3 766.2 766.6 765.2 767.4 771.2 771.9 770.1 764.3 756.4 DAY 16 27 29 5 5 30 16 5 13 23 13 10 MEAN QNH PRESSURE IN HPA 1016.1 1015.3 1012.1 1016.9 1020.1 1017.6 1014.5 1018.4 1021.5 1023.4 1020.4 1017.6 1017.8 MAX. QNH PRESSURE IN HPA 1023.2 1023.4 1022.6 1022.0 1024.2 1022.1 1018.2 1021.7 1026.4 1027.9 1027.9 1022.2 1027.9 DAY 7 17 11 14 12 11 28 10 19 9 8 28 MIN. QNH PRESSURE IN HPA 1004.4 1009.7 999.4 1008.1 1011.7 1012.2 1010.5 1013.2 1018.0 1018.8 1016.6 1009.3 999.4 DAY 16 27 29 5 5 30 16 5 13 23 13 10 MEAN QFF PRESSURE IN HPA 1022.3 1020.5 1012.3 1011.7 1006.7 998.8 991.5 995.7 1003.8 1010.8 1016.2 ****** ****** MAX. QFF PRESSURE IN HPA 1040.4 1035.0 1025.1 1022.1 1015.7 1004.0 994.9 999.6 1008.9 1014.0 1022.1 ****** ****** DAY 20 8 1 14 6 11 7 29 19 31 8 ** MIN. QFF PRESSURE IN HPA 1002.5 1007.2 997.4 1000.4 1000.5 991.4 987.1 989.9 997.4 1004.8 1009.2 ****** ****** DAY 16 22 29 5 31 30 16 5 3 6 12 ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 769.1 768.9 766.3 770.0 772.5 770.3 767.8 770.4 773.2 774.4 772.0 769.9 770.4 MAX. QFE PRESSURE IN HPA 774.2 774.1 774.3 774.3 775.5 773.8 770.2 773.2 776.3 778.2 778.0 774.1 778.2 DAY 7 17 11 14 12 14 28 10 19 9 8 28 MIN. QFE PRESSURE IN HPA 760.8 764.7 756.2 762.6 766.2 765.2 763.8 766.7 770.4 770.8 769.3 764.3 756.2 DAY 17 10 29 5 5 30 16 5 10 23 13 10 MEAN QNH PRESSURE IN HPA 1015.3 1015.0 1011.9 1016.4 1019.6 1016.8 1013.7 1016.9 1020.5 1022.0 1019.0 1016.4 1017.0 MAX. QNH PRESSURE IN HPA 1021.7 1021.6 1021.9 1021.9 1023.4 1021.2 1016.7 1020.5 1024.4 1026.7 1026.5 1021.6 1026.7 DAY 7 17 11 14 12 14 28 10 19 9 8 28 MIN. QNH PRESSURE IN HPA 1004.9 1009.8 999.2 1007.2 1011.7 1010.5 1008.7 1012.3 1017.0 1017.5 1015.6 1009.3 999.2 DAY 17 10 29 5 5 30 16 5 10 23 13 10 MEAN QFF PRESSURE IN HPA 1019.8 1018.4 1011.0 1010.8 1005.9 997.7 990.2 993.3 1001.8 1008.5 1013.7 ****** ****** MAX. QFF PRESSURE IN HPA 1035.8 1028.8 1021.5 1020.6 1014.9 1003.9 994.5 996.8 1006.4 1012.4 1020.0 ****** ****** DAY 19 8 1 13 6 1 25 26 19 31 8 ** MIN. QFF PRESSURE IN HPA 1004.7 1007.1 997.1 1000.8 999.7 988.8 984.6 988.4 997.0 1005.5 1007.6 ****** ****** DAY 16 22 29 5 31 30 16 5 3 7 19 ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 768.1 767.7 765.5 769.2 771.5 769.7 767.2 769.3 772.4 773.9 771.2 769.2 769.6 MAX. QFE PRESSURE IN HPA 773.1 772.5 773.0 773.6 774.2 773.0 769.5 772.0 775.6 777.7 777.0 773.6 777.7 DAY 7 17 11 14 12 13 25 10 20 13 8 28 MIN. QFE PRESSURE IN HPA 760.0 763.9 757.8 761.7 766.4 764.5 763.9 766.0 769.8 770.9 768.3 763.8 757.8 DAY 17 10 29 5 5 30 16 5 10 23 27 10 MEAN QNH PRESSURE IN HPA 1014.1 1013.6 1010.8 1015.5 1018.4 1016.1 1013.0 1015.6 1019.5 1021.4 1017.9 1015.5 1015.9 MAX. QNH PRESSURE IN HPA 1020.3 1019.6 1020.2 1021.0 1021.7 1020.2 1015.8 1019.0 1023.5 1026.1 1025.2 1021.0 1026.1 DAY 7 17 11 14 12 13 25 10 20 13 8 28 MIN. QNH PRESSURE IN HPA 1003.9 1008.8 1001.2 1006.1 1012.0 1009.6 1008.8 1011.5 1016.2 1017.6 1014.3 1008.7 1001.2 DAY 17 10 29 5 5 30 16 5 10 23 27 10 MEAN QFF PRESSURE IN HPA 1018.2 1016.8 1010.5 1010.3 1005.6 998.4 990.9 993.5 1002.5 1009.4 1013.4 ****** ****** MAX. QFF PRESSURE IN HPA 1034.3 1026.9 1019.3 1020.2 1013.5 1003.8 995.2 999.0 1006.7 1014.5 1018.7 ****** ****** DAY 19 8 11 13 6 4 6 31 20 13 8 ** MIN. QFF PRESSURE IN HPA 1003.8 1006.4 1000.1 1000.3 1000.7 989.2 986.0 988.9 998.1 1006.1 1008.5 ****** ****** DAY 16 22 29 5 31 29 16 5 3 6 19 ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 768.5 767.9 765.7 769.2 771.5 769.7 767.3 769.6 772.8 774.4 771.8 769.9 769.9 MAX. QFE PRESSURE IN HPA 773.3 772.3 773.4 773.2 773.9 773.7 769.7 772.2 775.8 778.6 777.3 774.0 778.6 DAY 12 17 11 14 12 13 25 10 20 8 8 28 MIN. QFE PRESSURE IN HPA 761.1 764.2 758.2 762.8 766.8 764.5 764.2 766.3 770.2 771.6 769.2 764.8 758.2 DAY 17 27 29 5 5 30 16 5 10 23 25 10 MEAN QNH PRESSURE IN HPA 1014.6 1013.8 1011.0 1015.5 1018.3 1016.1 1013.1 1016.0 1020.0 1022.0 1018.7 1016.4 1016.3 MAX. QNH PRESSURE IN HPA 1020.6 1019.3 1020.7 1020.5 1021.3 1021.1 1016.1 1019.2 1023.7 1027.2 1025.6 1021.5 1027.2 DAY 12 17 11 14 12 13 25 10 20 8 8 28 MIN. QNH PRESSURE IN HPA 1005.3 1009.2 1001.7 1007.4 1012.5 1009.6 1009.2 1011.8 1016.7 1018.5 1015.5 1009.9 1001.7 DAY 17 27 29 5 5 30 16 5 10 23 25 10 MEAN QFF PRESSURE IN HPA 1020.7 1019.3 1012.1 1011.3 1006.5 999.7 992.8 996.1 1005.4 1011.9 1015.6 1020.7 1009.3 MAX. QFF PRESSURE IN HPA 1039.8 1027.1 1021.4 1022.1 1013.8 1005.1 996.8 1002.4 1009.4 1015.8 1020.6 1037.0 1039.8 DAY 19 8 30 1 6 4 25 31 18 28 7 28 MIN. QFF PRESSURE IN HPA 1004.6 1005.5 1001.2 1000.1 1002.2 989.6 988.6 991.8 1000.9 1007.9 1012.7 1006.1 988.6 DAY 16 22 29 5 31 29 15 4 2 3 19 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 769.0 768.6 766.4 770.0 772.4 770.5 768.0 770.6 773.6 775.0 772.3 ****** ****** MAX. QFE PRESSURE IN HPA 774.1 773.2 774.3 774.1 775.6 774.0 770.2 772.9 776.2 779.0 777.9 ****** ****** DAY 6 16 11 14 11 14 25 10 18 8 7 ** MIN. QFE PRESSURE IN HPA 761.6 765.2 758.6 764.2 767.1 765.4 765.0 767.1 771.2 772.1 769.4 ****** ****** DAY 31 27 7 10 4 30 16 5 12 23 30 ** MEAN QNH PRESSURE IN HPA 1015.2 1014.7 1011.9 1016.4 1019.5 1017.1 1014.0 1017.2 1021.0 1022.8 1019.4 ****** ****** MAX. QNH PRESSURE IN HPA 1021.6 1020.5 1021.9 1021.6 1023.5 1021.5 1016.7 1020.1 1024.2 1027.7 1026.4 ****** ****** DAY 6 16 11 14 11 14 25 10 18 8 7 ** MIN. QNH PRESSURE IN HPA 1005.9 1010.5 1002.2 1009.2 1012.8 1010.7 1010.2 1012.8 1018.0 1019.1 1015.7 ****** ****** DAY 31 27 7 10 4 30 16 5 12 23 30 ** MEAN QFF PRESSURE IN HPA 1021.3 1019.9 1012.1 1011.1 1006.1 998.4 991.2 994.7 1003.4 1010.4 1015.2 ****** ****** MAX. QFF PRESSURE IN HPA 1040.6 1029.8 1022.0 1021.9 1014.4 1003.3 994.7 1000.1 1007.9 1015.2 1021.1 ****** ****** DAY 19 8 1 1 6 7 5 31 30 31 7 ** MIN. QFF PRESSURE IN HPA 1005.5 1007.0 1001.3 1002.9 1000.3 989.8 987.4 989.9 998.5 1004.2 1011.0 ****** ****** DAY 16 22 7 9 4 29 11 4 2 6 19 ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 768.8 768.4 765.9 769.8 772.4 770.4 768.0 770.8 773.5 774.8 772.0 ****** ****** MAX. QFE PRESSURE IN HPA 774.1 773.9 773.7 773.5 776.1 773.8 770.9 773.0 776.5 778.5 777.7 ****** ****** DAY 6 16 11 14 11 14 28 10 18 8 7 ** MIN. QFE PRESSURE IN HPA 761.1 764.7 758.9 764.0 766.7 765.4 764.6 766.8 770.7 771.5 766.8 ****** ****** DAY 31 26 7 9 4 30 11 5 12 23 30 ** MEAN QNH PRESSURE IN HPA 1014.9 1014.4 1011.4 1016.2 1019.4 1016.9 1013.9 1017.5 1020.8 1022.5 1019.0 ****** ****** MAX. QNH PRESSURE IN HPA 1021.6 1021.3 1021.1 1020.8 1024.1 1021.2 1017.6 1020.2 1024.6 1027.1 1026.1 ****** ****** DAY 6 16 11 14 11 14 28 10 18 8 7 ** MIN. QNH PRESSURE IN HPA 1005.3 1009.8 1002.6 1008.9 1012.3 1010.7 1009.7 1012.5 1017.3 1018.3 1012.5 ****** ****** DAY 31 26 7 9 4 30 11 5 12 23 30 ** MEAN QFF PRESSURE IN HPA 1019.4 1017.8 1010.5 1010.4 1005.5 997.6 990.4 993.9 1002.1 1009.0 1013.7 ****** ****** MAX. QFF PRESSURE IN HPA 1037.0 1028.3 1021.0 1020.5 1014.4 1003.2 994.5 998.9 1007.4 1015.6 1021.7 ****** ****** DAY 19 7 30 13 6 4 6 31 18 31 3 ** MIN. QFF PRESSURE IN HPA 1004.1 1004.8 1002.0 1001.9 999.6 989.9 985.3 988.9 996.5 1003.7 1007.8 ****** ****** DAY 15 21 24 9 30 30 11 5 2 6 18 ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.6 -3.2 0.8 9.3 14.7 19.8 22.4 22.6 18.7 12.4 7.8 5.8 10.5 MINIMUN AIR TEMPERATURE (C) -12.0 -8.4 -4.1 3.6 8.0 11.4 14.3 14.2 10.2 4.5 -0.4 -0.3 3.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 25 19 14 0 0 0 0 0 0 0 0 4 62 DAYS WITH FREEZING MIN.<= 0 30 24 21 5 0 0 0 0 0 0 23 16 119 TEMPERATURE RECORDS LOWEST(C) -25.0 -21.0 -16.2 -2.6 1.2 8.0 11.2 12.0 6.4 0.2 -3.4 -6.4 -25.0 DAY 22 18 6 25 2 1 26 1 6 30 27 6 MAXIMUM AIR TEMPERATURE (C) -0.3 3.0 6.1 14.2 20.1 27.0 29.7 29.9 26.1 20.3 16.4 12.5 17.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 13 20 0 0 0 0 36 DAYS WITH MAXIMUM TEMP. <= 0 16 6 0 0 0 0 0 0 0 0 0 0 22 TEMPERATURE RECORDS HIGHEST(C) 6.8 9.2 12.6 20.8 25.6 30.6 34.4 32.0 29.6 25.2 19.2 19.6 34.4 DAY 4 7 28 15 28 30 12 19 1 4 18 10 DIF. BETWEEN (MAX.-MIN.) (C) 11.7 11.4 10.2 10.6 12.1 15.6 15.4 15.7 15.9 15.8 16.8 12.8 13.7 MEAN DAILY TEMP. (MDT) (C) -6.1 -2.7 1.0 8.9 14.1 19.2 22.0 22.1 18.1 12.4 8.0 6.1 10.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.2 39.9 37.2 0.8 0.0 0.0 0.0 79.1 HEATING DEG. DAYS(BASE 18 0C) 748.6 579.2 525.8 272.9 122.3 7.8 0.0 0.0 15.8 173.6 299.9 367.9 3113.8 DEWPOINT (MEAN C) -11.2 -8.9 -6.3 -3.2 0.2 1.5 4.0 2.3 -1.2 -4.7 -8.3 -7.1 -3.6 MIXING RATIO (G/KG) 2.31 2.77 3.35 4.11 5.20 5.72 6.85 5.99 4.75 3.70 2.80 3.17 4.23 VAPOUR PRESSURE (HPA) 2.84 3.40 4.11 5.06 6.40 7.03 8.38 7.36 5.85 4.58 3.47 3.93 5.20 SATURATION DEF. (HPA) 1.54 1.82 2.81 7.08 10.96 17.13 19.78 21.22 16.74 10.66 7.72 5.69 10.26 RELATIVE HUMIDITY (MEAN %) 67 67 62 45 41 33 33 29 30 35 36 47 44 RELATIVE HUMIDITY (MAX. %) 83 86 80 69 65 57 57 51 51 61 62 68 66 RELATIVE HUMIDITY (MIN. %) 51 47 45 27 24 18 18 15 15 17 17 27 27 RELATIVE HUMIDITY (MEAN% 03UTC) 76 70 68 59 61 56 56 50 50 57 60 59 60 RELATIVE HUMIDITY (MEAN% 09UTC) 61 57 54 32 28 20 20 19 16 22 24 35 32 RELATIVE HUMIDITY (MEAN% 15UTC) 64 66 60 42 30 25 24 20 21 25 22 39 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 283.4 362.5 556.4 76.9 41.6 0.8 7.9 0.0 1.0 31.1 6.5 120.1 1488.2 DAYS WITH PRECIPITATION >=10 9 8 11 3 2 0 0 0 0 2 0 6 41 DAYS WITH PRECIPITATION >= 5 9 8 12 5 3 0 1 0 0 2 0 6 46 DAYS WITH PRECIPITATION >= 1 12 11 16 8 5 0 1 0 1 2 2 7 65 DAYS WITH PRECIPITATION 13 21 17 11 7 3 5 1 1 4 2 7 92 GREATEST DAILY PRECIPITATION 71.0 94.0 141.0 31.0 21.0 0.3 7.0 0.0 1.0 16.0 3.5 32.0 141.0 DAY 5 9 18 28 14 16 25 ** 16 10 12 27 DAY WITH THUNDER STORM 2 7 10 5 4 1 4 0 1 3 0 5 42 DAYS WITH SNOW OR SLEET 15 21 11 1 0 0 0 0 0 0 0 7 55 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 225 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 10.7 13.4 11.2 9.5 8.3 8.3 7.7 8.6 9.0 9.3 7.9 9.0 9.2 PREVAILING WIND PERCENT 9.5 14.3 21.8 25.4 21.0 10.0 11.3 9.3 16.3 10.9 16.3 17.3 15.3 CALMS PERCENT OF WIND 68.6 60.3 52.0 47.5 48.4 78.3 75.8 75.0 69.2 72.2 74.6 61.3 65.2 NO. OF WIND OBSERVATION 169 224 248 240 248 240 248 248 240 248 240 248 2841 VECTOR WIND DIRECTION (MEAN) 267 251 259 255 265 261 261 257 261 266 277 253 260 VECTOR WIND MAGNITUDE(KNOTS) 1.8 3.5 4.0 3.8 2.8 1.0 1.1 0.9 2.1 1.9 1.6 2.1 2.2 WIND STEADINESES (MEAN %) 62.1 72.9 75.5 73.1 63.6 58.8 61.1 47.4 77.8 79.2 80.0 61.8 68.7 WIND SPEED (MEAN KNOTS) 2.9 4.8 5.3 5.2 4.4 1.7 1.8 1.9 2.7 2.4 2.0 3.4 3.2 FASTEST WIND DIRECTION 300 290 310 240 260 340 270 110 300 310 180 210 310 FASTEST WIND SPEED (KNOTS) 19 35 43 29 21 25 21 14 16 29 21 25 43 DAY 21 8 18 22 29 3 27 8 6 31 30 30 DAYS WITH SKY CLEAR (0-2)/8 16 11 11 16 21 25 22 23 26 28 20 16 235 DAYS WITH P.CLOUDY (3-6)/8 7 11 10 10 8 4 9 8 4 1 9 10 91 DAYS WITH CLOUDY (7-8)/8 8 6 10 4 2 1 0 0 0 2 1 5 39 DAYS WITH VISIBILITY =< 2 KM 10 4 5 0 1 0 0 0 0 0 0 4 24 DURATION OF SUNSHINE HOURS 148.8 147.8 170.3 248.9 320.7 334.2 330.0 315.4 295.4 270.0 221.9 179.9 2983.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 767.1 768.2 768.6 770.8 771.8 771.8 769.3 771.8 772.4 774.1 774.4 774.5 771.2 MAX. QFE PRESSURE IN HPA 774.6 777.2 775.3 780.2 779.0 776.3 774.2 776.2 776.4 778.9 780.1 781.6 781.6 DAY-HOUR 22- 6 23- 6 28- 9 12- 6 8- 6 6- 6 19-21 28- 6 26-18 14- 6 21- 6 10- 6 MIN. QFE PRESSURE IN HPA 754.3 758.8 757.5 763.7 765.7 766.6 763.6 767.5 768.3 770.0 770.0 768.0 754.3 DAY-HOUR 13- 3 16- 0 30- 0 23- 0 30- 0 30-15 8-12 22-12 4-12 3-15 1-12 21- 0 MEAN QNH PRESSURE IN HPA 1012.8 1014.2 1014.8 1017.5 1018.8 1018.7 1015.6 1018.7 1019.5 1021.6 1022.0 1022.2 1018.0 MAX. QNH PRESSURE IN HPA 1022.2 1025.5 1023.1 1029.2 1027.7 1024.4 1021.7 1024.2 1024.5 1027.6 1029.1 1031.0 1031.0 DAY-HOUR 22- 6 23- 6 28- 9 12- 6 8- 6 6- 6 19-21 28- 6 26-18 14- 6 21- 6 10- 6 MIN. QNH PRESSURE IN HPA 996.8 1002.4 1000.8 1008.6 1011.1 1012.2 1008.4 1013.3 1014.3 1016.5 1016.5 1014.0 996.8 DAY-HOUR 13- 3 16- 0 30- 0 23- 0 30- 0 30-15 8-12 22-12 4-12 3-15 1-12 21- 0 MEAN QFF PRESSURE IN HPA ****** 1017.1 1013.6 1008.1 1004.3 999.6 994.1 997.2 1001.5 1009.5 1014.4 1016.4 ****** MAX. QFF PRESSURE IN HPA ****** 1036.1 1027.9 1021.4 1012.7 1006.9 1003.5 1004.7 1009.0 1018.3 1022.7 1027.9 ****** DAY-HOUR **-** 24- 3 6- 3 12- 3 3- 3 5- 3 21- 3 29- 3 29- 3 14- 3 27- 6 9- 6 MIN. QFF PRESSURE IN HPA ****** 1002.2 993.8 996.6 994.1 991.5 985.8 992.2 993.1 998.0 1007.8 1004.3 ****** DAY-HOUR **-** 11-21 30- 0 23- 0 30- 0 30-15 9- 9 22- 9 3- 9 1- 9 15-21 21- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** 767.8 767.9 770.3 771.5 771.6 769.2 771.7 772.4 774.0 774.3 774.4 ****** MAX. QFE PRESSURE IN HPA ****** 775.3 773.8 778.7 777.2 775.1 773.0 775.2 775.2 777.7 778.9 780.6 ****** DAY ** 24 28 12 8 6 20 29 27 14 21 10 MIN. QFE PRESSURE IN HPA ****** 758.8 757.5 763.7 765.7 768.4 764.4 768.8 769.2 770.8 771.0 768.0 ****** DAY ** 16 30 23 30 30 9 22 4 31 11 21 MEAN QNH PRESSURE IN HPA ****** 1013.7 1013.8 1016.8 1018.3 1018.5 1015.4 1018.6 1019.5 1021.5 1021.9 1022.0 ****** MAX. QNH PRESSURE IN HPA ****** 1023.1 1021.2 1027.4 1025.5 1022.8 1020.2 1023.0 1023.0 1026.1 1027.6 1029.7 ****** DAY ** 24 28 12 8 6 20 29 27 14 21 10 MIN. QNH PRESSURE IN HPA ****** 1002.4 1000.8 1008.6 1011.1 1014.5 1009.4 1015.0 1015.5 1017.5 1017.7 1014.0 ****** DAY ** 16 30 23 30 30 9 22 4 31 11 21 MEAN QFF PRESSURE IN HPA ****** 1015.8 1012.3 1007.3 1004.1 999.7 993.8 996.8 1001.4 1008.6 1013.5 1015.8 ****** MAX. QFF PRESSURE IN HPA ****** 1033.2 1024.0 1017.9 1011.0 1006.1 1000.4 1001.9 1005.9 1015.3 1018.4 1025.5 ****** DAY ** 24 6 12 3 20 21 29 28 14 21 6 MIN. QFF PRESSURE IN HPA ****** 1002.8 993.8 996.6 994.1 992.9 987.7 994.2 995.5 1000.6 1008.0 1004.3 ****** DAY ** 8 30 23 30 30 8 22 3 1 16 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 766.8 767.9 768.3 770.7 772.0 772.3 769.8 772.4 772.9 774.4 774.8 774.7 771.4 MAX. QFE PRESSURE IN HPA 773.2 775.3 774.3 779.7 778.4 775.9 773.8 776.0 775.7 778.2 779.2 780.8 780.8 DAY 22 23 28 12 8 6 21 29 29 14 21 10 MIN. QFE PRESSURE IN HPA 754.3 760.2 760.2 764.5 765.9 769.0 764.9 769.2 769.8 770.5 771.9 769.3 754.3 DAY 13 16 2 23 30 30 8 22 4 31 11 21 MEAN QNH PRESSURE IN HPA 1012.5 1013.8 1014.3 1017.4 1019.0 1019.4 1016.2 1019.5 1020.1 1022.0 1022.5 1022.3 1018.3 MAX. QNH PRESSURE IN HPA 1020.5 1023.1 1021.9 1028.6 1027.0 1023.9 1021.2 1024.0 1023.6 1026.7 1028.0 1030.0 1030.0 DAY 22 23 28 12 8 6 21 29 29 14 21 10 MIN. QNH PRESSURE IN HPA 996.8 1004.2 1004.2 1009.6 1011.3 1015.2 1010.1 1015.5 1016.2 1017.1 1018.8 1015.6 996.8 DAY 13 16 2 23 30 30 8 22 4 31 11 21 MEAN QFF PRESSURE IN HPA 1019.9 1017.9 1014.3 1009.5 1005.6 1001.7 996.1 999.8 1004.1 1011.9 1016.9 1017.9 1009.6 MAX. QFF PRESSURE IN HPA 1035.9 1036.1 1027.9 1021.4 1012.7 1006.9 1003.5 1004.7 1009.0 1018.3 1022.0 1027.4 1036.1 DAY 15 24 6 12 3 5 21 29 29 14 21 6 MIN. QFF PRESSURE IN HPA 1002.4 1003.3 1000.0 999.7 995.5 994.7 990.5 996.3 997.7 1002.4 1009.2 1007.8 990.5 DAY 13 12 18 23 30 30 8 22 3 2 16 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 768.0 769.0 769.4 771.5 772.6 772.7 770.0 772.8 773.3 775.1 775.7 775.5 772.1 MAX. QFE PRESSURE IN HPA 774.6 777.2 775.1 780.2 779.0 776.3 773.9 776.2 776.3 778.9 780.1 781.6 781.6 DAY 22 23 28 12 8 6 22 28 29 14 21 10 MIN. QFE PRESSURE IN HPA 756.3 761.2 760.4 766.3 766.1 769.2 764.8 769.2 769.9 771.8 772.8 769.7 756.3 DAY 13 15 1 23 30 30 8 22 4 1 16 21 MEAN QNH PRESSURE IN HPA 1013.9 1015.2 1015.7 1018.4 1019.7 1019.8 1016.5 1020.0 1020.6 1022.9 1023.6 1023.4 1019.1 MAX. QNH PRESSURE IN HPA 1022.2 1025.5 1022.8 1029.2 1027.7 1024.4 1021.3 1024.2 1024.4 1027.6 1029.1 1031.0 1031.0 DAY 22 23 28 12 8 6 22 28 29 14 21 10 MIN. QNH PRESSURE IN HPA 999.3 1005.4 1004.4 1011.8 1011.6 1015.5 1009.9 1015.5 1016.3 1018.7 1020.0 1016.1 999.3 DAY 13 15 1 23 30 30 8 22 4 1 16 21 MEAN QFF PRESSURE IN HPA ****** 1018.8 1014.5 1008.6 1004.7 1000.1 994.2 998.0 1001.9 1010.6 1016.5 1018.1 ****** MAX. QFF PRESSURE IN HPA ****** 1035.5 1027.9 1017.7 1010.7 1005.5 1001.3 1002.3 1007.2 1017.2 1022.7 1027.9 ****** DAY ** 24 6 12 3 5 22 28 29 14 27 9 MIN. QFF PRESSURE IN HPA ****** 1005.8 999.3 1000.0 995.6 993.7 987.4 993.1 994.9 1001.1 1009.4 1007.9 ****** DAY ** 8 18 21 30 30 8 22 3 1 16 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 767.3 768.5 769.0 771.2 772.1 771.9 769.2 771.7 772.3 774.0 774.2 774.4 771.3 MAX. QFE PRESSURE IN HPA 773.7 776.5 775.3 779.6 778.2 775.9 773.2 774.8 775.6 777.5 778.9 779.8 779.8 DAY 22 23 28 12 8 6 20 28 26 14 21 9 MIN. QFE PRESSURE IN HPA 756.0 760.3 759.0 766.0 766.7 768.4 764.2 768.1 768.8 771.0 771.0 769.5 756.0 DAY 13 15 1 5 30 30 8 22 4 1 1 21 MEAN QNH PRESSURE IN HPA 1013.1 1014.6 1015.2 1018.0 1019.1 1018.9 1015.5 1018.6 1019.4 1021.4 1021.8 1022.0 1018.1 MAX. QNH PRESSURE IN HPA 1021.1 1024.6 1023.1 1028.5 1026.7 1023.9 1020.5 1022.5 1023.5 1025.9 1027.6 1028.7 1028.7 DAY 22 23 28 12 8 6 20 28 26 14 21 9 MIN. QNH PRESSURE IN HPA 998.9 1004.3 1002.7 1011.5 1012.3 1014.5 1009.2 1014.1 1015.0 1017.7 1017.7 1015.8 998.9 DAY 13 15 1 5 30 30 8 22 4 1 1 21 MEAN QFF PRESSURE IN HPA ****** 1016.8 1013.2 1007.9 1004.1 998.9 992.9 995.9 1000.0 1007.8 1012.4 1014.9 ****** MAX. QFF PRESSURE IN HPA ****** 1031.4 1025.8 1018.1 1009.9 1003.9 1000.5 1000.0 1005.6 1014.7 1018.5 1022.9 ****** DAY ** 24 6 12 3 20 21 28 26 14 21 6 MIN. QFF PRESSURE IN HPA ****** 1005.1 996.5 998.0 996.2 992.8 985.8 992.2 993.1 998.0 1007.9 1006.6 ****** DAY ** 8 18 21 30 30 9 22 3 1 16 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 766.6 767.5 768.1 770.5 771.4 771.1 768.5 770.7 771.6 773.1 773.2 773.8 770.5 MAX. QFE PRESSURE IN HPA 772.5 775.8 774.8 778.3 776.7 775.2 772.6 773.8 775.0 776.3 776.9 779.0 779.0 DAY 4 23 28 12 8 5 15 28 26 14 21 9 MIN. QFE PRESSURE IN HPA 757.3 759.0 758.1 765.6 766.7 767.1 763.6 767.5 768.3 770.0 770.0 769.4 757.3 DAY 13 15 1 5 30 30 8 22 4 4 1 21 MEAN QNH PRESSURE IN HPA 1012.2 1013.4 1014.1 1017.1 1018.2 1017.8 1014.6 1017.3 1018.5 1020.3 1020.5 1021.2 1017.1 MAX. QNH PRESSURE IN HPA 1019.6 1023.7 1022.5 1026.9 1024.9 1023.0 1019.7 1021.2 1022.7 1024.4 1025.1 1027.7 1027.7 DAY 4 23 28 12 8 5 15 28 26 14 21 9 MIN. QNH PRESSURE IN HPA 1000.6 1002.7 1001.6 1011.0 1012.3 1012.8 1008.4 1013.3 1014.3 1016.5 1016.5 1015.7 1000.6 DAY 13 15 1 5 30 30 8 22 4 4 1 21 MEAN QFF PRESSURE IN HPA ****** 1015.4 1012.5 1007.5 1003.9 999.0 993.1 995.6 1000.7 1007.7 1012.1 1015.1 ****** MAX. QFF PRESSURE IN HPA ****** 1028.5 1023.9 1017.3 1009.9 1005.3 999.1 1000.1 1005.2 1013.3 1015.5 1022.4 ****** DAY ** 3 5 12 3 16 21 28 26 14 20 9 MIN. QFF PRESSURE IN HPA ****** 1003.7 997.3 998.0 996.5 991.7 987.1 992.2 993.9 1000.1 1008.2 1007.0 ****** DAY ** 15 18 21 30 30 8 22 3 1 1 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 767.0 768.0 768.4 770.5 771.4 771.0 768.8 770.8 771.7 773.5 773.9 774.4 770.8 MAX. QFE PRESSURE IN HPA 773.1 776.1 774.2 777.0 776.1 774.7 772.4 774.1 775.2 776.8 778.0 780.2 780.2 DAY 4 23 28 12 8 5 15 28 26 14 21 9 MIN. QFE PRESSURE IN HPA 757.3 759.2 759.3 765.8 767.2 766.6 763.8 768.0 768.5 770.0 770.8 769.9 757.3 DAY 12 15 1 21 30 30 8 4 4 3 1 21 MEAN QNH PRESSURE IN HPA 1012.7 1013.9 1014.5 1017.0 1018.2 1017.8 1015.0 1017.4 1018.6 1020.9 1021.3 1022.0 1017.4 MAX. QNH PRESSURE IN HPA 1020.3 1024.1 1021.7 1025.2 1024.1 1022.4 1019.5 1021.6 1023.0 1025.0 1026.5 1029.2 1029.2 DAY 4 23 28 12 8 5 15 28 26 14 21 9 MIN. QNH PRESSURE IN HPA 1000.6 1002.9 1003.1 1011.2 1013.0 1012.2 1008.7 1014.0 1014.6 1016.5 1017.5 1016.3 1000.6 DAY 12 15 1 21 30 30 8 4 4 3 1 21 MEAN QFF PRESSURE IN HPA 1020.1 1017.8 1014.4 1008.9 1004.8 1000.1 995.2 997.9 1002.8 1011.0 1015.8 1017.6 1008.9 MAX. QFF PRESSURE IN HPA 1036.9 1034.5 1027.2 1018.2 1010.8 1005.8 999.7 1002.9 1008.0 1017.2 1021.1 1026.0 1036.9 DAY 22 2 5 11 2 20 21 28 26 25 21 9 MIN. QFF PRESSURE IN HPA 1004.2 1004.8 999.1 998.9 997.9 991.5 990.0 994.2 996.7 1002.1 1009.9 1009.3 990.0 DAY 12 15 18 21 30 30 8 12 3 2 11 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** 768.6 769.2 771.1 772.0 771.8 769.8 771.9 772.7 774.4 774.7 774.8 ****** MAX. QFE PRESSURE IN HPA ****** 776.8 775.0 777.9 777.0 775.5 773.8 775.0 776.4 777.9 778.8 781.1 ****** DAY ** 23 27 12 8 5 19 28 26 13 20 9 MIN. QFE PRESSURE IN HPA ****** 759.5 761.0 766.6 767.8 768.0 765.0 768.8 770.0 771.3 772.0 770.0 ****** DAY ** 15 1 22 14 29 8 22 3 3 1 31 MEAN QNH PRESSURE IN HPA ****** 1014.7 1015.5 1017.9 1019.0 1018.7 1016.2 1018.9 1019.8 1022.0 1022.3 1022.5 ****** MAX. QNH PRESSURE IN HPA ****** 1025.0 1022.7 1026.4 1025.2 1023.4 1021.2 1022.7 1024.5 1026.4 1027.5 1030.4 ****** DAY ** 23 27 12 8 5 19 28 26 13 20 9 MIN. QNH PRESSURE IN HPA ****** 1003.3 1005.2 1012.2 1013.7 1014.0 1010.2 1015.0 1016.5 1018.1 1019.0 1016.5 ****** DAY ** 15 1 22 14 29 8 22 3 3 1 31 MEAN QFF PRESSURE IN HPA ****** 1018.1 1014.3 1008.0 1004.1 999.1 994.2 997.0 1001.3 1009.9 1015.3 1017.3 ****** MAX. QFF PRESSURE IN HPA ****** 1034.6 1026.3 1016.1 1009.4 1004.2 1000.5 1001.3 1005.7 1016.0 1020.3 1026.7 ****** DAY ** 2 6 6 2 5 21 28 26 14 20 9 MIN. QFF PRESSURE IN HPA ****** 1004.5 1003.9 1000.5 997.0 991.7 987.7 993.1 994.9 1001.2 1009.4 1008.6 ****** DAY ** 7 1 21 29 30 11 22 3 2 11 17 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** 768.0 769.0 770.8 771.9 771.8 769.7 772.1 772.6 774.3 774.6 774.5 ****** MAX. QFE PRESSURE IN HPA ****** 776.5 774.9 778.4 777.4 775.4 774.2 775.2 776.0 778.1 778.6 780.8 ****** DAY ** 23 27 11 8 5 19 28 26 13 20 9 MIN. QFE PRESSURE IN HPA ****** 759.1 761.8 764.5 767.0 768.0 764.6 769.2 769.6 771.0 771.4 769.0 ****** DAY ** 15 1 22 29 29 8 21 3 3 10 20 MEAN QNH PRESSURE IN HPA ****** 1014.0 1015.2 1017.4 1018.8 1018.8 1016.1 1019.1 1019.8 1021.9 1022.2 1022.1 ****** MAX. QNH PRESSURE IN HPA ****** 1024.6 1022.6 1027.0 1025.7 1023.2 1021.7 1023.0 1024.0 1026.6 1027.2 1030.0 ****** DAY ** 23 27 11 8 5 19 28 26 13 20 9 MIN. QNH PRESSURE IN HPA ****** 1002.8 1006.2 1009.6 1012.7 1014.0 1009.7 1015.5 1016.0 1017.7 1018.2 1015.2 ****** DAY ** 15 1 22 29 29 8 21 3 3 10 20 MEAN QFF PRESSURE IN HPA ****** 1016.2 1013.2 1007.2 1003.7 998.6 993.5 996.4 1000.2 1008.5 1012.8 1015.1 ****** MAX. QFF PRESSURE IN HPA ****** 1033.3 1025.1 1017.0 1009.9 1004.1 1001.2 1000.3 1005.5 1015.4 1017.1 1023.7 ****** DAY ** 2 5 6 2 19 20 28 26 13 21 5 MIN. QFF PRESSURE IN HPA ****** 1002.2 1000.4 996.8 995.0 991.9 987.6 992.7 994.2 1001.9 1007.8 1005.2 ****** DAY ** 11 29 22 29 30 8 20 2 3 15 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.2 -1.5 1.0 9.1 16.0 20.4 22.4 22.4 18.4 12.5 5.7 0.2 10.2 MINIMUN AIR TEMPERATURE (C) -9.5 -7.8 -3.9 4.0 7.5 11.3 14.2 14.2 9.0 4.3 0.6 -5.5 3.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 22 20 13 0 0 0 0 0 0 0 2 20 77 DAYS WITH FREEZING MIN.<= 0 31 27 28 4 0 0 0 0 0 1 15 28 134 TEMPERATURE RECORDS LOWEST(C) -24.6 -17.2 -10.8 -1.4 3.4 5.2 11.8 12.4 4.4 0.0 -9.6 -15.8 -24.6 DAY 27 7 16 12 12 7 29 29 25 22 30 6 MAXIMUM AIR TEMPERATURE (C) 2.1 5.1 6.4 14.3 22.7 27.3 29.5 29.6 26.5 20.1 11.5 7.2 16.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 14 12 0 0 0 0 26 DAYS WITH MAXIMUM TEMP. <= 0 8 0 0 0 0 0 0 0 0 0 0 0 8 TEMPERATURE RECORDS HIGHEST(C) 10.2 10.6 11.2 20.2 28.2 29.6 32.8 31.0 29.6 24.6 16.6 13.6 32.8 DAY 6 8 31 26 31 20 4 26 5 1 19 30 DIF. BETWEEN (MAX.-MIN.) (C) 11.6 12.9 10.3 10.3 15.2 16.0 15.3 15.4 17.5 15.8 10.9 12.7 13.7 MEAN DAILY TEMP. (MDT) (C) -3.7 -1.4 1.3 9.1 15.1 19.3 21.9 21.9 17.8 12.2 6.0 0.8 10.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.8 34.4 28.2 0.0 0.0 0.0 0.0 64.4 HEATING DEG. DAYS(BASE 18 0C) 673.6 542.0 519.0 265.8 93.4 4.9 0.0 0.0 34.0 179.0 358.8 532.0 3202.5 DEWPOINT (MEAN C) -8.5 -7.7 -6.2 -2.3 -2.0 -1.6 3.2 1.4 -3.3 -2.8 -3.4 -7.1 -3.4 MIXING RATIO (G/KG) 2.81 2.97 3.29 4.36 4.48 4.55 6.44 5.57 3.99 4.17 4.03 3.08 4.15 VAPOUR PRESSURE (HPA) 3.46 3.66 4.03 5.36 5.52 5.60 7.87 6.85 4.92 5.15 4.97 3.81 5.10 SATURATION DEF. (HPA) 1.35 2.11 2.75 6.59 13.48 19.38 20.26 21.15 17.52 10.22 4.62 2.74 10.18 RELATIVE HUMIDITY (MEAN %) 74 65 62 48 33 25 31 27 25 39 56 64 46 RELATIVE HUMIDITY (MAX. %) 89 83 82 70 57 46 52 47 44 61 80 83 66 RELATIVE HUMIDITY (MIN. %) 54 46 44 31 17 12 19 15 13 22 34 42 29 RELATIVE HUMIDITY (MEAN% 03UTC) 84 74 76 63 54 45 49 47 43 58 73 78 62 RELATIVE HUMIDITY (MEAN% 09UTC) 63 58 49 35 20 15 22 16 15 25 43 53 35 RELATIVE HUMIDITY (MEAN% 15UTC) 70 63 57 44 24 17 22 20 18 32 50 54 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 232.6 301.2 175.5 96.4 2.0 0.0 0.0 2.0 0.0 15.3 215.7 131.0 1171.7 DAYS WITH PRECIPITATION >=10 8 9 6 3 0 0 0 0 0 0 5 3 34 DAYS WITH PRECIPITATION >= 5 9 11 8 4 0 0 0 0 0 1 7 5 45 DAYS WITH PRECIPITATION >= 1 10 11 13 7 1 0 0 1 0 3 10 5 61 DAYS WITH PRECIPITATION 12 13 17 10 3 0 1 3 0 7 10 6 82 GREATEST DAILY PRECIPITATION 77.0 115.0 41.4 42.0 2.0 0.0 0.0 2.0 0.0 9.0 107.0 54.0 115.0 DAY 9 20 13 2 14 ** ** 18 ** 31 8 2 DAY WITH THUNDER STORM 3 4 4 1 2 0 0 1 0 1 6 1 23 DAYS WITH SNOW OR SLEET 13 11 14 1 0 0 0 0 0 0 3 5 47 DAYS WITH DUST 1 2 0 1 0 0 0 0 0 1 0 0 5 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 315 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.3 11.2 10.4 9.6 8.4 7.7 8.2 7.4 7.5 7.5 8.9 11.2 8.9 PREVAILING WIND PERCENT 6.5 13.8 14.9 23.8 18.5 20.8 18.1 7.3 16.3 12.5 16.7 8.9 14.6 CALMS PERCENT OF WIND 83.5 66.1 58.9 43.3 58.9 55.0 63.3 73.4 60.4 67.7 60.0 81.0 64.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 259 257 249 264 268 264 264 280 283 296 277 274 268 VECTOR WIND MAGNITUDE(KNOTS) 0.9 2.9 2.7 3.7 2.5 2.4 1.8 0.7 2.3 1.7 2.5 1.7 2.1 WIND STEADINESES (MEAN %) 69.2 78.4 73.0 69.8 73.5 68.6 64.3 35.0 79.3 68.0 67.6 85.0 67.7 WIND SPEED (MEAN KNOTS) 1.3 3.7 3.7 5.3 3.4 3.5 2.8 2.0 2.9 2.5 3.7 2.0 3.1 FASTEST WIND DIRECTION 330 210 260 270 280 340 220 150 270 70 260 280 210 FASTEST WIND SPEED (KNOTS) 23 49 19 21 17 19 16 14 16 21 19 29 49 DAY 30 21 21 17 10 5 14 2 7 31 1 26 DAYS WITH SKY CLEAR (0-2)/8 16 14 14 12 27 30 28 22 30 26 16 19 254 DAYS WITH P.CLOUDY (3-6)/8 4 7 8 12 4 0 3 9 0 2 10 6 65 DAYS WITH CLOUDY (7-8)/8 11 7 9 6 0 0 0 0 0 3 4 6 46 DAYS WITH VISIBILITY =< 2 KM 11 6 7 1 0 0 0 0 0 0 1 2 28 DURATION OF SUNSHINE HOURS 119.0 168.7 177.4 246.0 355.2 372.8 346.0 284.0 307.8 262.9 186.4 177.5 3003.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 769.3 769.5 767.8 770.8 771.3 770.5 768.5 771.4 771.7 774.4 772.1 774.0 771.0 MAX. QFE PRESSURE IN HPA 774.9 775.0 775.6 775.0 778.3 776.5 772.8 776.7 776.6 778.0 777.4 779.5 779.5 DAY-HOUR 12- 6 12- 6 31- 6 30- 6 28- 6 1- 6 19- 3 19- 6 30- 6 17- 6 18- 6 6- 6 MIN. QFE PRESSURE IN HPA 762.1 758.7 760.0 764.4 766.9 764.4 764.4 766.9 767.9 770.0 767.3 768.1 758.7 DAY-HOUR 9-12 6- 0 2- 3 8-15 4-12 25- 0 12-15 14-12 16-12 31- 6 12- 0 16- 0 MEAN QNH PRESSURE IN HPA 1015.6 1015.8 1013.7 1017.5 1018.1 1017.1 1014.6 1018.2 1018.6 1021.9 1019.1 1021.5 1017.7 MAX. QNH PRESSURE IN HPA 1022.6 1022.7 1023.5 1022.7 1026.9 1024.6 1020.0 1024.9 1024.7 1026.5 1025.7 1028.4 1028.4 DAY-HOUR 12- 6 12- 6 31- 6 30- 6 28- 6 1- 6 19- 3 19- 6 30- 6 17- 6 18- 6 6- 6 MIN. QNH PRESSURE IN HPA 1006.6 1002.3 1003.9 1009.4 1012.6 1009.4 1009.4 1012.6 1013.8 1016.5 1013.1 1014.1 1002.3 DAY-HOUR 9-12 6- 0 2- 3 8-15 4-12 25- 0 12-15 14-12 16-12 31- 6 12- 0 16- 0 MEAN QFF PRESSURE IN HPA 1019.5 1017.1 1012.3 1008.2 1002.7 997.7 993.1 996.9 1001.0 1009.6 1013.1 1021.4 1007.7 MAX. QFF PRESSURE IN HPA 1036.9 1031.9 1021.6 1016.9 1014.1 1005.5 1001.5 1005.4 1011.6 1016.0 1023.4 1038.5 1038.5 DAY-HOUR 27- 6 7- 6 8- 3 11- 3 1- 3 1- 3 29- 3 20- 3 30- 3 30- 3 30- 3 6- 3 MIN. QFF PRESSURE IN HPA 1006.0 999.5 1001.3 997.9 995.8 988.3 988.0 990.5 994.1 1003.6 1004.4 1008.7 988.0 DAY-HOUR 9- 9 20-18 2-12 8- 0 20- 9 25- 0 12-21 14-21 11- 9 8-12 1- 6 14-18 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 769.2 769.0 767.4 770.3 771.0 770.3 768.6 771.3 771.7 774.4 771.8 773.8 770.7 MAX. QFE PRESSURE IN HPA 774.0 773.2 774.3 773.4 776.5 775.3 771.6 775.8 774.9 777.2 776.1 778.0 778.0 DAY 12 13 31 30 29 2 19 20 30 17 16 6 MIN. QFE PRESSURE IN HPA 764.2 758.7 761.2 765.0 767.3 764.4 765.9 768.0 768.5 772.0 767.3 768.1 758.7 DAY 19 6 3 8 5 25 13 14 16 22 12 16 MEAN QNH PRESSURE IN HPA 1015.5 1015.3 1013.2 1016.8 1017.8 1016.9 1014.7 1018.2 1018.6 1021.9 1018.7 1021.2 1017.4 MAX. QNH PRESSURE IN HPA 1021.5 1020.5 1021.9 1020.7 1024.6 1023.1 1018.5 1023.7 1022.6 1025.5 1024.1 1026.5 1026.5 DAY 12 13 31 30 29 2 19 20 30 17 16 6 MIN. QNH PRESSURE IN HPA 1009.2 1002.3 1005.4 1010.2 1013.1 1009.4 1011.3 1014.0 1014.6 1019.0 1013.1 1014.1 1002.3 DAY 19 6 3 8 5 25 13 14 16 22 12 16 MEAN QFF PRESSURE IN HPA 1018.7 1015.9 1011.5 1007.3 1002.5 997.6 993.3 996.8 1000.9 1009.2 1011.9 1020.5 1007.2 MAX. QFF PRESSURE IN HPA 1034.4 1025.8 1019.2 1014.2 1010.9 1003.6 999.5 1003.4 1007.5 1013.0 1020.2 1033.4 1034.4 DAY 27 1 8 23 1 7 29 20 30 28 30 6 MIN. QFF PRESSURE IN HPA 1008.7 1000.5 1003.3 997.9 995.9 988.3 989.3 992.0 996.2 1005.2 1006.6 1009.5 988.3 DAY 7 6 3 8 14 25 12 14 12 20 8 27 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 769.0 769.3 767.6 770.6 771.6 770.9 769.1 772.1 772.3 774.8 772.2 774.1 771.1 MAX. QFE PRESSURE IN HPA 773.9 773.8 775.1 774.2 777.0 775.9 772.8 776.2 775.6 777.5 776.3 778.6 778.6 DAY 12 12 31 30 29 1 19 20 30 12 16 6 MIN. QFE PRESSURE IN HPA 763.1 759.0 760.0 765.6 767.7 764.8 766.5 768.5 768.8 770.7 767.8 768.5 759.0 DAY 18 6 2 8 4 25 13 14 16 31 12 15 MEAN QNH PRESSURE IN HPA 1015.2 1015.6 1013.5 1017.3 1018.5 1017.6 1015.4 1019.0 1019.3 1022.5 1019.2 1021.5 1017.9 MAX. QNH PRESSURE IN HPA 1021.3 1021.2 1022.8 1021.7 1025.2 1023.9 1020.0 1024.2 1023.5 1025.9 1024.4 1027.2 1027.2 DAY 12 12 31 30 29 1 19 20 30 12 16 6 MIN. QNH PRESSURE IN HPA 1007.8 1002.7 1003.9 1011.0 1013.6 1009.9 1012.1 1014.6 1015.0 1017.3 1013.7 1014.6 1002.7 DAY 18 6 2 8 4 25 13 14 16 31 12 15 MEAN QFF PRESSURE IN HPA 1020.1 1018.5 1013.4 1009.2 1004.8 999.4 995.3 999.6 1004.1 1012.4 1014.6 1022.9 1009.5 MAX. QFF PRESSURE IN HPA 1036.8 1029.8 1021.6 1016.9 1014.1 1005.5 1001.5 1005.4 1011.6 1016.0 1023.4 1038.5 1038.5 DAY 27 1 8 11 1 1 29 20 30 30 30 6 MIN. QFF PRESSURE IN HPA 1007.7 1001.6 1001.8 999.7 997.7 989.7 991.4 994.3 999.0 1006.5 1006.9 1010.3 989.7 DAY 9 6 2 8 14 25 12 14 16 31 1 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 770.0 770.5 768.6 771.3 772.1 771.2 769.3 772.6 772.7 775.4 773.1 775.0 771.8 MAX. QFE PRESSURE IN HPA 774.9 775.0 775.6 775.0 778.3 776.5 772.8 776.7 776.6 778.0 777.4 779.5 779.5 DAY 12 12 31 30 28 1 19 19 30 17 18 6 MIN. QFE PRESSURE IN HPA 763.6 763.0 761.0 765.8 767.8 765.3 766.4 768.7 769.0 770.0 768.4 769.0 761.0 DAY 18 6 2 8 20 25 12 14 16 31 12 14 MEAN QNH PRESSURE IN HPA 1016.5 1017.0 1014.7 1018.1 1019.0 1018.0 1015.6 1019.7 1019.8 1023.3 1020.3 1022.8 1018.7 MAX. QNH PRESSURE IN HPA 1022.6 1022.7 1023.5 1022.7 1026.9 1024.6 1020.0 1024.9 1024.7 1026.5 1025.7 1028.4 1028.4 DAY 12 12 31 30 28 1 19 19 30 17 18 6 MIN. QNH PRESSURE IN HPA 1008.4 1007.7 1005.2 1011.2 1013.7 1010.6 1012.0 1014.8 1015.2 1016.5 1014.5 1015.2 1005.2 DAY 18 6 2 8 20 25 12 14 16 31 12 14 MEAN QFF PRESSURE IN HPA 1020.9 1019.0 1013.4 1008.7 1002.9 997.7 993.5 997.8 1001.4 1010.5 1014.2 1023.4 1008.6 MAX. QFF PRESSURE IN HPA 1036.9 1031.9 1021.0 1015.3 1012.0 1003.9 999.2 1004.1 1009.5 1014.1 1022.9 1038.3 1038.3 DAY 27 7 8 11 1 2 29 19 30 30 14 6 MIN. QFF PRESSURE IN HPA 1006.9 1008.0 1002.6 1000.6 996.0 990.1 989.8 991.6 996.2 1005.0 1004.4 1011.3 989.8 DAY 9 6 2 8 20 24 23 14 16 31 1 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 769.5 770.0 768.3 771.1 771.5 770.6 768.6 771.4 771.5 774.3 772.0 774.0 771.1 MAX. QFE PRESSURE IN HPA 774.5 774.5 775.0 774.6 777.7 775.8 771.4 775.4 775.8 777.2 775.8 778.4 778.4 DAY 12 12 31 30 28 1 19 19 30 11 15 6 MIN. QFE PRESSURE IN HPA 762.6 764.0 760.8 765.7 767.4 765.0 765.6 767.6 768.1 771.5 767.5 768.9 760.8 DAY 9 5 2 9 20 24 12 14 16 31 12 15 MEAN QNH PRESSURE IN HPA 1015.8 1016.5 1014.3 1017.8 1018.4 1017.2 1014.7 1018.2 1018.3 1021.8 1018.9 1021.5 1017.8 MAX. QNH PRESSURE IN HPA 1022.1 1022.1 1022.7 1022.2 1026.1 1023.7 1018.2 1023.2 1023.7 1025.5 1023.7 1027.0 1027.0 DAY 12 12 31 30 28 1 19 19 30 11 15 6 MIN. QNH PRESSURE IN HPA 1007.2 1008.9 1004.9 1011.1 1013.2 1010.2 1011.0 1013.5 1014.1 1018.3 1013.3 1015.1 1004.9 DAY 9 5 2 9 20 24 12 14 16 31 12 15 MEAN QFF PRESSURE IN HPA 1018.5 1016.9 1012.0 1007.9 1002.0 996.9 992.1 995.8 999.1 1007.9 1011.9 1020.0 1006.8 MAX. QFF PRESSURE IN HPA 1030.6 1029.0 1018.9 1014.9 1011.1 1002.5 996.6 1001.3 1006.6 1013.1 1020.0 1033.2 1033.2 DAY 27 7 19 11 1 2 29 20 30 27 30 6 MIN. QFF PRESSURE IN HPA 1006.0 1007.2 1001.3 1000.9 995.8 989.3 988.4 990.6 994.1 1003.8 1007.1 1009.7 988.4 DAY 9 21 2 8 20 24 12 14 11 8 11 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 768.6 768.9 767.3 770.4 770.7 770.1 767.7 770.4 770.8 773.4 771.3 773.2 770.2 MAX. QFE PRESSURE IN HPA 773.8 773.5 772.9 774.1 776.0 775.1 770.0 774.6 774.6 776.4 774.8 777.4 777.4 DAY 12 12 31 22 28 1 8 19 30 11 15 6 MIN. QFE PRESSURE IN HPA 762.1 762.3 760.0 765.0 766.9 764.8 764.5 766.9 767.9 770.5 767.4 768.2 760.0 DAY 9 5 2 8 4 24 12 14 16 31 11 15 MEAN QNH PRESSURE IN HPA 1014.7 1015.1 1013.0 1017.0 1017.3 1016.5 1013.6 1016.9 1017.4 1020.7 1018.1 1020.5 1016.7 MAX. QNH PRESSURE IN HPA 1021.2 1020.8 1020.1 1021.6 1024.0 1022.8 1016.5 1022.2 1022.2 1024.5 1022.5 1025.7 1025.7 DAY 12 12 31 22 28 1 8 19 30 11 15 6 MIN. QNH PRESSURE IN HPA 1006.6 1006.8 1003.9 1010.2 1012.6 1009.9 1009.6 1012.6 1013.8 1017.1 1013.2 1014.2 1003.9 DAY 9 5 2 8 4 24 12 14 16 31 11 15 MEAN QFF PRESSURE IN HPA 1017.9 1015.5 1011.2 1007.4 1002.0 997.3 992.1 995.7 999.8 1008.2 1011.4 1019.6 1006.5 MAX. QFF PRESSURE IN HPA 1029.1 1025.0 1018.1 1016.1 1010.3 1003.9 996.8 1001.9 1006.8 1014.2 1020.1 1033.0 1033.0 DAY 11 12 7 22 1 1 28 19 30 27 30 6 MIN. QFF PRESSURE IN HPA 1006.1 1006.5 1001.3 999.3 996.9 991.3 988.4 991.0 995.5 1003.6 1006.3 1009.2 988.4 DAY 9 5 2 8 20 24 20 14 6 8 1 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 769.1 769.2 767.4 770.5 770.7 770.0 767.6 770.4 771.0 773.8 771.9 773.8 770.5 MAX. QFE PRESSURE IN HPA 774.0 773.5 773.0 775.0 775.5 775.2 770.2 774.7 774.7 776.7 775.7 777.8 777.8 DAY 11 12 30 30 28 1 8 19 30 11 15 5 MIN. QFE PRESSURE IN HPA 763.6 761.0 760.2 764.4 766.9 764.8 764.4 766.9 768.0 771.2 768.1 768.7 760.2 DAY 9 5 2 8 20 24 12 14 16 31 12 15 MEAN QNH PRESSURE IN HPA 1015.4 1015.4 1013.2 1017.1 1017.4 1016.5 1013.5 1016.9 1017.7 1021.2 1018.8 1021.2 1017.0 MAX. QNH PRESSURE IN HPA 1021.5 1020.8 1020.2 1022.7 1023.4 1023.0 1016.7 1022.4 1022.4 1024.9 1023.6 1026.2 1026.2 DAY 11 12 30 30 28 1 8 19 30 11 15 5 MIN. QNH PRESSURE IN HPA 1008.4 1005.2 1004.2 1009.4 1012.6 1009.9 1009.4 1012.6 1014.0 1018.0 1014.1 1014.8 1004.2 DAY 9 5 2 8 20 24 12 14 16 31 12 15 MEAN QFF PRESSURE IN HPA 1020.4 1018.0 1013.0 1009.0 1003.6 998.4 993.6 997.5 1002.5 1011.3 1014.4 1022.4 1008.7 MAX. QFF PRESSURE IN HPA 1034.7 1028.9 1021.0 1014.8 1011.1 1005.2 999.5 1003.4 1009.6 1015.1 1023.1 1036.8 1036.8 DAY 22 7 7 30 1 1 28 18 30 28 30 5 MIN. QFF PRESSURE IN HPA 1006.7 1004.8 1002.9 1000.0 998.9 992.8 989.5 992.7 998.1 1007.2 1007.0 1010.3 989.5 DAY 9 5 2 8 20 24 12 13 10 3 1 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 769.8 769.7 768.2 771.1 771.5 770.8 768.5 771.5 772.0 774.6 772.5 774.4 771.2 MAX. QFE PRESSURE IN HPA 774.5 774.0 773.9 774.8 776.5 776.0 771.0 776.7 775.5 777.2 776.1 778.4 778.4 DAY 11 12 30 25 28 1 28 19 30 11 15 5 MIN. QFE PRESSURE IN HPA 764.6 759.9 761.8 765.3 767.5 765.4 765.2 767.6 769.4 771.3 768.1 768.4 759.9 DAY 18 20 2 8 20 24 12 13 15 31 11 14 MEAN QNH PRESSURE IN HPA 1016.2 1016.1 1014.2 1017.9 1018.4 1017.5 1014.6 1018.3 1018.9 1022.2 1019.5 1021.9 1018.0 MAX. QNH PRESSURE IN HPA 1022.1 1021.5 1021.3 1022.5 1024.6 1024.0 1017.7 1024.9 1023.4 1025.5 1024.1 1027.0 1027.0 DAY 11 12 30 25 28 1 28 19 30 11 15 5 MIN. QNH PRESSURE IN HPA 1009.7 1003.8 1006.2 1010.6 1013.3 1010.7 1010.5 1013.5 1015.7 1018.1 1014.1 1014.5 1003.8 DAY 18 20 2 8 20 24 12 13 15 31 11 14 MEAN QFF PRESSURE IN HPA 1020.9 1017.7 1012.7 1008.4 1002.2 997.4 992.6 996.5 1000.7 1009.6 1013.7 1022.4 1007.9 MAX. QFF PRESSURE IN HPA 1035.7 1027.8 1020.0 1016.4 1008.9 1003.8 999.1 1003.9 1007.2 1013.8 1022.9 1037.5 1037.5 DAY 26 1 7 10 1 1 28 19 30 29 30 5 MIN. QFF PRESSURE IN HPA 1009.4 999.5 1004.1 1001.8 996.9 990.1 989.1 990.8 996.8 1006.1 1005.8 1008.7 989.1 DAY 17 20 2 8 20 24 12 13 6 31 1 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 769.6 769.5 768.0 771.0 771.6 770.6 768.8 771.6 772.0 774.5 772.4 774.2 771.1 MAX. QFE PRESSURE IN HPA 774.3 773.8 774.4 774.2 776.8 775.8 771.4 776.3 775.7 777.5 776.5 778.5 778.5 DAY 11 12 30 30 28 1 18 19 30 11 15 5 MIN. QFE PRESSURE IN HPA 764.2 759.6 761.6 765.7 767.7 765.0 765.4 767.8 769.1 771.2 767.7 768.5 759.6 DAY 17 5 2 8 20 24 12 14 15 31 11 15 MEAN QNH PRESSURE IN HPA 1016.0 1015.8 1013.9 1017.8 1018.4 1017.2 1014.9 1018.5 1019.0 1022.1 1019.4 1021.8 1017.9 MAX. QNH PRESSURE IN HPA 1021.9 1021.2 1022.0 1021.7 1025.0 1023.7 1018.2 1024.4 1023.6 1025.9 1024.6 1027.1 1027.1 DAY 11 12 30 30 28 1 18 19 30 11 15 5 MIN. QNH PRESSURE IN HPA 1009.2 1003.4 1005.9 1011.1 1013.6 1010.2 1010.7 1013.7 1015.3 1018.0 1013.6 1014.6 1003.4 DAY 17 5 2 8 20 24 12 14 15 31 11 15 MEAN QFF PRESSURE IN HPA 1019.0 1016.0 1011.6 1007.8 1001.7 996.9 992.3 995.8 999.9 1008.2 1012.6 1020.3 1006.8 MAX. QFF PRESSURE IN HPA 1033.6 1024.9 1018.1 1015.0 1008.4 1002.6 997.9 1002.3 1006.5 1012.5 1021.0 1034.6 1034.6 DAY 26 12 7 10 1 2 28 19 28 27 30 5 MIN. QFF PRESSURE IN HPA 1006.5 1001.1 1002.7 1000.5 996.8 988.9 988.0 990.5 994.6 1005.0 1007.1 1009.1 988.0 DAY 6 5 2 7 19 24 12 14 10 19 25 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.9 -5.0 0.8 11.5 16.0 19.9 22.3 22.3 18.0 10.8 3.9 -2.7 9.4 MINIMUN AIR TEMPERATURE (C) -10.6 -11.9 -4.9 4.9 7.4 9.7 13.4 13.6 9.0 4.6 -0.7 -7.5 2.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 25 25 16 0 0 0 0 0 0 0 5 16 87 DAYS WITH FREEZING MIN.<= 0 31 29 26 3 0 0 0 0 0 0 18 25 132 TEMPERATURE RECORDS LOWEST(C) -21.0 -27.4 -15.4 -2.2 1.6 6.4 10.8 9.4 6.6 0.4 -5.6 -22.0 -27.4 DAY 14 10 4 1 13 10 21 31 4 19 27 17 MAXIMUM AIR TEMPERATURE (C) 1.1 2.5 6.3 17.2 22.4 27.7 29.8 30.0 25.9 17.5 9.6 3.2 16.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 5 14 15 1 0 0 0 35 DAYS WITH MAXIMUM TEMP. <= 0 13 6 0 0 0 0 0 0 0 0 0 6 25 TEMPERATURE RECORDS HIGHEST(C) 11.0 7.0 10.8 21.6 26.4 32.2 32.2 32.2 30.4 20.6 15.8 8.4 32.2 DAY 2 20 22 14 30 30 1 3 9 1 2 2 DIF. BETWEEN (MAX.-MIN.) (C) 11.7 14.4 11.2 12.3 15.0 18.0 16.4 16.4 16.9 12.9 10.3 10.7 13.8 MEAN DAILY TEMP. (MDT) (C) -4.7 -4.7 0.7 11.0 14.9 18.7 21.6 21.8 17.5 11.0 4.5 -2.1 9.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 2.4 27.3 31.1 0.1 0.0 0.0 0.0 60.9 HEATING DEG. DAYS(BASE 18 0C) 704.5 658.6 535.4 209.0 95.6 10.6 0.0 0.0 32.0 216.5 405.0 623.4 3490.6 DEWPOINT (MEAN C) -9.5 -9.3 -5.7 -2.0 -2.9 -0.9 1.1 0.9 -0.8 -1.6 -2.9 -6.8 -3.4 MIXING RATIO (G/KG) 2.65 2.66 3.40 4.48 4.18 4.80 5.52 5.43 4.78 4.68 4.14 3.23 4.16 VAPOUR PRESSURE (HPA) 3.26 3.28 4.18 5.52 5.15 5.90 6.77 6.67 5.89 5.77 5.10 3.98 5.12 SATURATION DEF. (HPA) 1.41 1.37 2.61 8.60 13.82 18.62 21.26 21.46 15.82 7.67 3.27 1.50 9.78 RELATIVE HUMIDITY (MEAN %) 73 74 64 42 30 28 27 26 31 48 66 76 49 RELATIVE HUMIDITY (MAX. %) 90 88 83 64 51 50 47 46 50 72 87 93 68 RELATIVE HUMIDITY (MIN. %) 51 55 46 26 18 15 16 15 18 28 42 57 32 RELATIVE HUMIDITY (MEAN% 03UTC) 83 80 76 63 49 50 46 45 50 64 83 82 64 RELATIVE HUMIDITY (MEAN% 09UTC) 70 65 55 29 21 18 17 17 19 34 50 70 39 RELATIVE HUMIDITY (MEAN% 15UTC) 67 71 59 34 24 18 20 19 23 40 57 72 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 263.3 179.8 173.7 11.5 1.3 0.6 0.0 0.0 0.5 85.1 59.2 302.9 1077.9 DAYS WITH PRECIPITATION >=10 7 5 4 0 0 0 0 0 0 4 2 10 32 DAYS WITH PRECIPITATION >= 5 10 6 4 1 0 0 0 0 0 5 4 11 41 DAYS WITH PRECIPITATION >= 1 11 7 7 2 1 0 0 0 0 8 8 14 58 DAYS WITH PRECIPITATION 15 9 8 6 2 1 0 0 1 10 11 16 79 GREATEST DAILY PRECIPITATION 86.0 65.0 81.0 6.0 1.0 0.6 0.0 0.0 0.5 31.0 22.0 58.0 86.0 DAY 6 14 24 10 9 17 ** ** 6 17 5 1 DAY WITH THUNDER STORM 4 1 2 0 0 0 0 0 0 3 0 5 15 DAYS WITH SNOW OR SLEET 15 9 5 0 0 0 0 0 0 1 4 17 51 DAYS WITH DUST 1 0 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 315 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 11.6 9.1 10.6 8.4 7.9 8.2 6.9 7.6 7.0 8.3 5.6 9.2 8.5 PREVAILING WIND PERCENT 14.9 7.3 14.5 20.0 19.0 13.8 6.5 11.3 17.9 12.5 7.1 14.5 12.9 CALMS PERCENT OF WIND 73.0 77.6 60.9 51.3 60.5 68.8 80.6 76.2 64.6 68.5 85.8 79.0 70.6 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 282 283 287 292 291 290 278 298 295 289 291 273 288 VECTOR WIND MAGNITUDE(KNOTS) 2.4 1.5 2.8 2.8 2.8 2.0 0.6 1.0 2.2 2.0 0.7 1.5 1.8 WIND STEADINESES (MEAN %) 85.7 75.0 71.8 68.3 82.4 80.0 42.9 62.5 88.0 76.9 77.8 83.3 72.0 WIND SPEED (MEAN KNOTS) 2.8 2.0 3.9 4.1 3.4 2.5 1.4 1.6 2.5 2.6 0.9 1.8 2.5 FASTEST WIND DIRECTION 330 320 160 150 300 210 10 320 310 210 280 260 160 FASTEST WIND SPEED (KNOTS) 29 29 39 19 23 16 27 14 16 19 12 19 39 DAY 26 25 25 11 1 16 4 14 11 14 3 20 DAYS WITH SKY CLEAR (0-2)/8 17 19 21 16 26 29 27 26 28 20 14 15 258 DAYS WITH P.CLOUDY (3-6)/8 5 3 5 12 5 1 4 5 2 8 10 5 65 DAYS WITH CLOUDY (7-8)/8 9 7 5 2 0 0 0 0 0 3 6 11 43 DAYS WITH VISIBILITY =< 2 KM 13 4 2 0 0 0 0 0 0 0 6 13 38 DURATION OF SUNSHINE HOURS 131.7 185.6 238.7 247.5 340.2 349.3 327.5 307.9 296.6 229.5 159.1 128.7 2942.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 768.2 769.0 769.3 772.2 771.5 769.5 770.2 771.3 771.9 773.9 772.6 771.0 770.9 MAX. QFE PRESSURE IN HPA 776.3 775.1 774.4 775.2 776.0 773.3 776.6 775.3 776.8 777.6 778.4 776.4 778.4 DAY-HOUR 30-21 11- 6 21- 6 2- 6 6-18 4- 6 30-21 21- 6 29-21 30- 6 17- 6 18- 6 MIN. QFE PRESSURE IN HPA 761.0 758.3 762.4 768.4 767.8 765.7 764.9 766.1 764.9 769.5 767.0 762.8 758.3 DAY-HOUR 28- 9 7- 3 2- 3 22- 0 27-12 26-12 12-12 31-12 2-12 2- 0 6-12 15- 9 MEAN QNH PRESSURE IN HPA 1014.2 1015.2 1015.6 1019.3 1018.3 1015.9 1016.8 1018.1 1018.9 1021.3 1019.7 1017.7 1017.6 MAX. QNH PRESSURE IN HPA 1024.4 1022.8 1022.0 1023.0 1024.0 1020.6 1024.7 1023.1 1025.0 1026.0 1027.0 1024.5 1027.0 DAY-HOUR 30-21 11- 6 21- 6 2- 6 6-18 4- 6 30-21 21- 6 29-21 30- 6 17- 6 18- 6 MIN. QNH PRESSURE IN HPA 1005.2 1001.8 1006.9 1014.5 1013.7 1011.1 1010.1 1011.6 1010.1 1015.8 1012.7 1007.4 1001.8 DAY-HOUR 28- 9 7- 3 2- 3 22- 0 27-12 26-12 12-12 31-12 2-12 2- 0 6-12 15- 9 MEAN QFF PRESSURE IN HPA 1018.9 1020.1 1014.5 1007.8 1002.8 996.8 995.5 996.9 1001.5 1010.5 1015.5 1020.2 1008.4 MAX. QFF PRESSURE IN HPA 1040.4 1043.9 1027.1 1018.8 1011.0 1004.4 1005.6 1005.9 1010.3 1017.7 1025.2 1041.8 1043.9 DAY-HOUR 31- 6 10-18 1- 6 2- 3 4- 3 18- 3 31- 3 21- 3 30- 3 27-15 17-18 17- 6 MIN. QFF PRESSURE IN HPA 1004.3 1001.5 1005.0 999.8 995.5 990.2 987.0 990.6 991.3 1002.3 1005.2 1007.0 987.0 DAY-HOUR 28-12 7- 0 25- 0 22- 0 27-12 23-21 10-21 3-21 2- 9 1-15 6-12 15- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 768.2 768.5 768.9 771.8 771.2 769.4 770.3 771.4 771.9 773.7 772.5 770.7 770.7 MAX. QFE PRESSURE IN HPA 775.8 774.3 773.4 775.0 775.0 772.6 775.7 774.5 775.9 775.5 776.3 774.9 776.3 DAY 31 11 21 13 7 17 31 1 30 16 12 30 MIN. QFE PRESSURE IN HPA 762.6 760.0 763.0 768.4 769.1 766.2 765.5 766.7 766.2 769.5 768.0 763.0 760.0 DAY 17 7 2 22 27 27 12 31 2 2 7 15 MEAN QNH PRESSURE IN HPA 1014.2 1014.6 1015.0 1018.7 1017.9 1015.8 1016.9 1018.2 1018.8 1021.1 1019.5 1017.3 1017.3 MAX. QNH PRESSURE IN HPA 1023.7 1021.9 1020.7 1022.7 1022.7 1019.7 1023.6 1022.1 1023.9 1023.4 1024.4 1022.6 1024.4 DAY 31 11 21 13 7 17 31 1 30 16 12 30 MIN. QNH PRESSURE IN HPA 1007.2 1003.9 1007.7 1014.5 1015.3 1011.7 1010.8 1012.3 1011.7 1015.8 1014.0 1007.7 1003.9 DAY 17 7 2 22 27 27 12 31 2 2 7 15 MEAN QFF PRESSURE IN HPA 1017.8 1018.8 1013.7 1007.1 1002.7 997.3 995.7 996.9 1001.3 1010.0 1014.7 1019.1 1007.9 MAX. QFF PRESSURE IN HPA 1036.2 1037.4 1023.7 1015.5 1008.1 1004.3 1004.0 1002.9 1007.2 1016.5 1022.1 1033.7 1037.4 DAY 31 11 1 2 13 17 31 1 30 5 18 18 MIN. QFF PRESSURE IN HPA 1006.7 1001.5 1005.0 999.8 997.0 992.7 987.7 991.8 993.0 1003.6 1006.9 1007.0 987.7 DAY 5 7 25 22 28 24 13 4 3 2 7 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 768.2 768.6 769.1 772.3 771.6 770.0 770.9 772.0 772.2 774.0 772.7 770.8 771.0 MAX. QFE PRESSURE IN HPA 775.3 774.5 773.4 774.6 775.0 773.2 775.9 774.8 775.9 776.5 777.2 775.2 777.2 DAY 31 11 21 2 7 4 31 21 9 16 17 18 MIN. QFE PRESSURE IN HPA 762.2 758.3 762.4 769.5 769.2 766.9 766.0 767.2 766.6 769.7 768.0 763.0 758.3 DAY 28 7 2 22 27 25 12 31 2 2 22 15 MEAN QNH PRESSURE IN HPA 1014.2 1014.7 1015.4 1019.3 1018.5 1016.5 1017.6 1019.0 1019.3 1021.5 1019.8 1017.5 1017.8 MAX. QNH PRESSURE IN HPA 1023.1 1022.1 1020.7 1022.2 1022.7 1020.5 1023.9 1022.5 1023.9 1024.6 1025.5 1023.0 1025.5 DAY 31 11 21 2 7 4 31 21 9 16 17 18 MIN. QNH PRESSURE IN HPA 1006.7 1001.8 1006.9 1015.8 1015.5 1012.6 1011.5 1013.0 1012.2 1016.1 1014.0 1007.7 1001.8 DAY 28 7 2 22 27 25 12 31 2 2 22 15 MEAN QFF PRESSURE IN HPA 1019.7 1021.2 1015.7 1009.7 1004.7 999.2 997.8 999.6 1004.2 1012.3 1017.0 1021.2 1010.2 MAX. QFF PRESSURE IN HPA 1039.3 1041.0 1027.0 1018.8 1011.0 1004.4 1005.6 1005.9 1010.3 1017.2 1023.5 1038.8 1041.0 DAY 31 11 1 2 4 18 31 21 30 30 29 17 MIN. QFF PRESSURE IN HPA 1006.2 1002.2 1006.8 1002.1 999.8 994.2 990.0 995.0 996.1 1003.9 1009.9 1007.8 990.0 DAY 28 7 2 22 20 24 13 4 3 1 1 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 769.1 769.7 770.1 773.0 772.0 770.3 771.2 772.5 772.9 774.8 773.6 771.8 771.7 MAX. QFE PRESSURE IN HPA 776.1 775.1 774.4 775.2 775.7 773.3 776.1 775.3 776.8 777.6 778.4 776.4 778.4 DAY 31 11 21 2 4 4 30 21 30 30 17 18 MIN. QFE PRESSURE IN HPA 761.8 758.6 763.5 770.4 769.8 767.0 766.2 767.7 766.8 770.0 769.2 763.3 758.6 DAY 28 7 2 22 17 25 12 30 2 2 22 15 MEAN QNH PRESSURE IN HPA 1015.3 1016.1 1016.6 1020.2 1019.0 1016.8 1018.0 1019.6 1020.0 1022.5 1020.9 1018.7 1018.6 MAX. QNH PRESSURE IN HPA 1024.1 1022.8 1022.0 1023.0 1023.6 1020.6 1024.1 1023.1 1025.0 1026.0 1027.0 1024.5 1027.0 DAY 31 11 21 2 4 4 30 21 30 30 17 18 MIN. QNH PRESSURE IN HPA 1006.2 1002.2 1008.3 1017.0 1016.2 1012.7 1011.7 1013.6 1012.5 1016.5 1015.5 1008.1 1002.2 DAY 28 7 2 22 17 25 12 30 2 2 22 15 MEAN QFF PRESSURE IN HPA 1020.9 1021.7 1015.7 1008.5 1002.6 997.0 996.1 997.8 1001.9 1011.3 1016.8 1021.8 1009.3 MAX. QFF PRESSURE IN HPA 1040.4 1041.7 1027.1 1015.8 1009.4 1002.6 1004.0 1003.4 1009.0 1016.9 1025.1 1041.8 1041.8 DAY 31 11 1 1 4 17 31 21 30 30 17 17 MIN. QFF PRESSURE IN HPA 1005.3 1002.5 1007.7 1001.4 997.6 990.5 987.9 993.0 993.2 1002.6 1007.6 1007.2 987.9 DAY 28 7 2 22 26 24 11 30 3 1 1 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 768.2 769.5 769.7 772.5 771.6 769.5 770.3 771.5 771.8 773.8 772.6 771.1 771.0 MAX. QFE PRESSURE IN HPA 775.0 773.6 773.9 774.6 775.3 772.8 775.2 774.1 775.6 776.9 777.2 775.5 777.2 DAY 31 10 21 13 6 30 30 23 29 30 17 18 MIN. QFE PRESSURE IN HPA 761.0 759.5 764.9 770.8 768.7 766.2 765.7 766.7 765.7 770.0 768.0 762.8 759.5 DAY 28 7 2 21 27 25 11 31 2 2 6 15 MEAN QNH PRESSURE IN HPA 1014.2 1015.8 1016.1 1019.6 1018.5 1015.8 1016.8 1018.3 1018.7 1021.3 1019.7 1017.8 1017.7 MAX. QNH PRESSURE IN HPA 1022.7 1021.0 1021.3 1022.2 1023.1 1020.0 1023.0 1021.6 1023.5 1025.1 1025.5 1023.4 1025.5 DAY 31 10 21 13 6 30 30 23 29 30 17 18 MIN. QNH PRESSURE IN HPA 1005.2 1003.3 1010.1 1017.5 1014.8 1011.7 1011.1 1012.3 1011.1 1016.5 1014.0 1007.4 1003.3 DAY 28 7 2 21 27 25 11 31 2 2 6 15 MEAN QFF PRESSURE IN HPA 1018.0 1019.3 1014.0 1007.2 1001.9 995.2 994.3 995.7 999.6 1009.3 1014.6 1019.2 1007.4 MAX. QFF PRESSURE IN HPA 1035.9 1037.5 1022.9 1014.5 1007.5 1001.2 1002.6 1000.4 1005.3 1017.2 1023.6 1036.1 1037.5 DAY 31 10 1 1 8 17 31 21 28 30 17 29 MIN. QFF PRESSURE IN HPA 1005.2 1005.1 1008.8 1001.7 995.7 990.5 987.3 990.8 991.3 1002.3 1006.9 1007.6 987.3 DAY 28 7 23 15 27 24 11 4 2 1 6 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 767.5 768.5 768.7 771.7 771.0 768.8 769.4 770.3 771.1 773.3 771.7 770.4 770.2 MAX. QFE PRESSURE IN HPA 773.9 772.5 772.6 773.6 774.6 771.7 774.5 773.0 775.0 776.7 776.2 774.9 776.7 DAY 30 10 21 13 6 4 30 23 29 27 17 18 MIN. QFE PRESSURE IN HPA 761.0 759.3 765.0 769.5 767.8 765.7 764.9 766.1 764.9 769.8 767.0 763.0 759.3 DAY 28 7 2 21 27 26 12 31 2 2 6 15 MEAN QNH PRESSURE IN HPA 1013.3 1014.6 1014.9 1018.6 1017.7 1015.0 1015.8 1016.9 1017.8 1020.6 1018.6 1016.9 1016.7 MAX. QNH PRESSURE IN HPA 1021.3 1019.6 1019.7 1021.0 1022.2 1018.6 1022.1 1020.2 1022.7 1024.9 1024.2 1022.6 1024.9 DAY 30 10 21 13 6 4 30 23 29 27 17 18 MIN. QNH PRESSURE IN HPA 1005.2 1003.1 1010.2 1015.8 1013.7 1011.1 1010.1 1011.6 1010.1 1016.2 1012.7 1007.7 1003.1 DAY 28 7 2 21 27 26 12 31 2 2 6 15 MEAN QFF PRESSURE IN HPA 1016.9 1018.6 1013.2 1006.8 1002.4 996.3 994.6 995.6 1000.4 1009.7 1013.8 1018.8 1007.3 MAX. QFF PRESSURE IN HPA 1030.8 1035.9 1021.5 1014.7 1006.4 1002.5 1002.4 999.9 1006.1 1017.2 1022.8 1034.0 1035.9 DAY 31 10 3 2 8 16 30 22 28 30 17 17 MIN. QFF PRESSURE IN HPA 1004.3 1004.9 1007.9 1002.1 995.5 992.5 987.9 991.7 992.1 1002.5 1005.2 1008.3 987.9 DAY 28 7 25 21 27 27 12 10 2 1 6 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 767.9 768.8 768.9 771.7 771.1 768.9 769.3 770.2 771.3 773.5 772.3 770.9 770.4 MAX. QFE PRESSURE IN HPA 775.2 773.7 773.5 773.6 775.2 771.5 774.4 772.9 775.2 776.6 776.1 775.7 776.6 DAY 30 10 20 13 6 17 30 20 29 27 17 29 MIN. QFE PRESSURE IN HPA 761.0 760.0 765.9 768.9 768.8 766.0 764.9 766.1 765.4 770.3 767.8 764.5 760.0 DAY 28 7 24 21 27 26 12 31 2 2 21 15 MEAN QNH PRESSURE IN HPA 1013.8 1015.0 1015.1 1018.6 1017.9 1015.1 1015.6 1016.8 1018.1 1020.8 1019.3 1017.6 1017.0 MAX. QNH PRESSURE IN HPA 1023.0 1021.1 1020.8 1021.0 1023.0 1018.3 1022.0 1020.1 1023.0 1024.7 1024.1 1023.6 1024.7 DAY 30 10 20 13 6 17 30 20 29 27 17 29 MIN. QNH PRESSURE IN HPA 1005.2 1003.9 1011.3 1015.1 1015.0 1011.5 1010.1 1011.6 1010.7 1016.8 1013.7 1009.6 1003.9 DAY 28 7 24 21 27 26 12 31 2 2 21 15 MEAN QFF PRESSURE IN HPA 1019.4 1021.3 1015.2 1009.0 1004.1 997.8 996.0 997.5 1003.2 1011.8 1016.5 1021.4 1009.4 MAX. QFF PRESSURE IN HPA 1034.7 1041.9 1026.7 1016.4 1010.2 1003.3 1003.7 1002.1 1008.8 1017.7 1024.0 1040.4 1041.9 DAY 24 10 3 1 3 17 30 20 29 27 17 29 MIN. QFF PRESSURE IN HPA 1004.3 1006.0 1007.9 1001.0 999.6 994.0 989.1 993.3 994.9 1002.3 1009.5 1010.8 989.1 DAY 28 7 18 21 26 24 10 10 2 1 6 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 768.5 769.4 769.6 772.6 771.8 769.7 770.1 771.2 772.2 774.2 772.9 771.2 771.1 MAX. QFE PRESSURE IN HPA 776.2 774.7 773.9 775.0 776.0 772.8 775.7 774.4 776.4 776.7 776.6 775.7 776.7 DAY 30 10 20 12 6 17 30 20 29 27 17 29 MIN. QFE PRESSURE IN HPA 762.3 761.0 765.4 769.5 769.6 767.0 765.5 767.1 766.4 770.8 768.0 764.4 761.0 DAY 28 7 24 21 26 26 11 31 2 1 21 14 MEAN QNH PRESSURE IN HPA 1014.6 1015.7 1015.9 1019.7 1018.7 1016.0 1016.6 1018.0 1019.2 1021.7 1020.1 1018.0 1017.9 MAX. QNH PRESSURE IN HPA 1024.2 1022.4 1021.3 1022.7 1024.0 1020.0 1023.6 1022.0 1024.5 1024.9 1024.7 1023.6 1024.9 DAY 30 10 20 12 6 17 30 20 29 27 17 29 MIN. QNH PRESSURE IN HPA 1006.8 1005.2 1010.7 1015.8 1016.0 1012.7 1010.8 1012.8 1012.0 1017.5 1014.0 1009.4 1005.2 DAY 28 7 24 21 26 26 11 31 2 1 21 14 MEAN QFF PRESSURE IN HPA 1020.5 1021.2 1014.9 1007.9 1002.4 996.3 995.0 996.3 1001.2 1010.6 1016.2 1021.0 1008.6 MAX. QFF PRESSURE IN HPA 1037.5 1043.9 1026.9 1015.0 1006.8 1003.1 1003.1 1002.0 1008.3 1016.1 1025.2 1039.1 1043.9 DAY 30 10 3 1 3 17 30 20 29 27 17 17 MIN. QFF PRESSURE IN HPA 1005.8 1007.5 1007.4 1002.4 997.1 992.2 987.6 992.3 993.0 1002.4 1008.2 1010.3 987.6 DAY 28 7 18 21 26 24 10 4 2 1 1 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 768.3 769.2 769.5 772.4 771.6 769.7 770.5 771.3 772.3 773.9 772.8 770.9 771.0 MAX. QFE PRESSURE IN HPA 776.3 774.7 773.9 775.0 775.0 773.1 776.6 774.6 776.8 776.1 776.5 775.2 776.8 DAY 30 10 20 12 6 16 30 20 29 27 11 17 MIN. QFE PRESSURE IN HPA 762.7 761.8 765.0 769.1 769.3 766.6 765.5 767.0 766.5 770.2 768.0 763.4 761.8 DAY 16 7 1 21 26 26 11 30 1 1 21 14 MEAN QNH PRESSURE IN HPA 1014.3 1015.4 1015.8 1019.5 1018.5 1016.1 1017.1 1018.1 1019.3 1021.4 1020.0 1017.6 1017.8 MAX. QNH PRESSURE IN HPA 1024.4 1022.4 1021.3 1022.7 1022.7 1020.3 1024.7 1022.2 1025.0 1024.1 1024.6 1023.0 1025.0 DAY 30 10 20 12 6 16 30 20 29 27 11 17 MIN. QNH PRESSURE IN HPA 1007.3 1006.2 1010.2 1015.3 1015.6 1012.2 1010.8 1012.7 1012.1 1016.7 1014.0 1008.2 1006.2 DAY 16 7 1 21 26 26 11 30 1 1 21 14 MEAN QFF PRESSURE IN HPA 1018.4 1019.0 1013.5 1006.7 1002.0 995.5 994.7 995.6 1000.4 1009.4 1014.8 1019.2 1007.4 MAX. QFF PRESSURE IN HPA 1036.8 1039.2 1023.4 1014.2 1006.0 1002.0 1004.1 1001.3 1007.3 1015.2 1023.1 1035.1 1039.2 DAY 30 10 3 1 4 16 30 20 29 4 17 27 MIN. QFF PRESSURE IN HPA 1007.7 1006.5 1005.5 1000.3 996.6 990.2 987.0 990.6 992.1 1003.0 1008.0 1007.5 987.0 DAY 20 6 18 21 26 23 10 3 2 1 6 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -7.2 -3.6 3.1 11.2 15.2 19.8 22.6 22.0 17.8 13.2 4.7 0.2 9.9 MINIMUN AIR TEMPERATURE (C) -13.9 -10.6 -3.2 4.0 8.2 10.5 14.1 13.0 8.9 6.9 -0.6 -4.4 2.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 28 24 13 0 0 0 0 0 0 0 4 14 83 DAYS WITH FREEZING MIN.<= 0 31 28 25 4 0 0 0 0 0 0 17 22 127 TEMPERATURE RECORDS LOWEST(C) -28.4 -17.8 -9.4 -2.6 3.2 6.2 10.6 10.0 5.2 2.4 -10.2 -17.4 -28.4 DAY 29 23 13 14 1 19 31 1 24 16 20 18 MAXIMUM AIR TEMPERATURE (C) 0.9 3.8 9.7 17.4 21.0 27.2 29.8 30.0 25.3 19.7 11.1 5.8 16.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 7 18 18 1 0 0 0 44 DAYS WITH MAXIMUM TEMP. <= 0 14 1 0 0 0 0 0 0 0 0 0 1 16 TEMPERATURE RECORDS HIGHEST(C) 7.4 8.2 16.4 20.6 26.6 31.0 32.4 31.8 30.6 23.8 19.6 8.6 32.4 DAY 1 28 31 3 15 24 13 18 3 5 5 31 DIF. BETWEEN (MAX.-MIN.) (C) 14.8 14.4 12.9 13.4 12.8 16.7 15.7 17.0 16.4 12.8 11.7 10.2 14.1 MEAN DAILY TEMP. (MDT) (C) -6.5 -3.4 3.3 10.7 14.6 18.9 21.9 21.5 17.1 13.3 5.2 0.7 9.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 6.8 37.0 22.7 0.0 0.0 0.0 0.0 66.5 HEATING DEG. DAYS(BASE 18 0C) 759.1 598.8 456.9 218.0 105.0 14.7 0.0 0.0 37.1 145.8 382.5 535.5 3253.4 DEWPOINT (MEAN C) -10.8 -8.6 -3.6 -4.7 -1.3 0.3 3.6 1.9 -0.9 -0.7 -5.5 -4.8 -2.9 MIXING RATIO (G/KG) 2.37 2.74 3.87 3.69 4.72 5.34 6.53 5.87 4.72 4.87 3.47 3.70 4.33 VAPOUR PRESSURE (HPA) 2.93 3.38 4.76 4.55 5.80 6.55 7.99 7.22 5.83 6.01 4.29 4.57 5.32 SATURATION DEF. (HPA) 1.02 1.59 3.20 9.19 12.24 17.77 20.66 20.47 15.55 9.74 4.86 1.90 9.85 RELATIVE HUMIDITY (MEAN %) 77 71 64 36 36 31 31 29 31 42 52 72 48 RELATIVE HUMIDITY (MAX. %) 91 89 83 61 60 54 52 49 51 62 72 85 67 RELATIVE HUMIDITY (MIN. %) 59 51 45 19 21 16 19 17 18 28 34 55 32 RELATIVE HUMIDITY (MEAN% 03UTC) 83 82 80 54 54 53 52 49 50 58 63 76 63 RELATIVE HUMIDITY (MEAN% 09UTC) 72 60 52 23 26 20 22 18 20 32 42 67 38 RELATIVE HUMIDITY (MEAN% 15UTC) 73 62 55 30 28 20 23 23 23 37 46 69 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 132.0 84.8 164.9 2.6 62.0 2.0 0.0 8.6 1.0 74.6 143.0 492.2 1167.7 DAYS WITH PRECIPITATION >=10 6 4 5 0 2 0 0 0 0 3 4 12 36 DAYS WITH PRECIPITATION >= 5 7 4 5 0 3 0 0 1 0 3 4 12 39 DAYS WITH PRECIPITATION >= 1 8 7 7 1 4 1 0 1 1 5 6 15 56 DAYS WITH PRECIPITATION 9 10 7 6 7 1 0 3 1 9 10 15 78 GREATEST DAILY PRECIPITATION 26.0 28.0 58.0 2.0 28.0 2.0 0.0 8.0 1.0 40.2 76.0 89.0 89.0 DAY 24 10 10 26 3 15 ** 12 23 29 18 1 DAY WITH THUNDER STORM 0 0 3 0 3 0 0 0 0 3 3 9 21 DAYS WITH SNOW OR SLEET 10 10 7 0 0 0 0 0 0 0 9 16 52 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 315 315 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.3 10.1 7.4 7.8 8.0 8.0 8.1 7.8 7.8 8.3 9.6 9.5 8.2 PREVAILING WIND PERCENT 3.6 9.8 15.7 23.3 20.2 15.4 12.1 12.1 15.8 15.3 12.9 8.5 13.2 CALMS PERCENT OF WIND 92.3 83.5 73.4 53.8 55.2 63.3 69.4 68.1 62.1 59.7 72.5 79.8 69.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 291 277 293 292 298 282 279 286 307 302 286 286 292 VECTOR WIND MAGNITUDE(KNOTS) 0.4 1.4 1.8 3.1 2.5 1.9 1.5 1.4 2.4 2.3 1.9 1.4 1.8 WIND STEADINESES (MEAN %) 66.7 82.4 90.0 79.5 67.6 63.3 62.5 58.3 75.0 67.6 73.1 70.0 69.2 WIND SPEED (MEAN KNOTS) 0.6 1.7 2.0 3.9 3.7 3.0 2.4 2.4 3.2 3.4 2.6 2.0 2.6 FASTEST WIND DIRECTION 330 250 280 300 20 340 340 330 270 30 270 300 20 FASTEST WIND SPEED (KNOTS) 16 27 17 19 29 14 16 19 23 19 29 29 29 DAY 1 21 25 12 19 5 18 14 16 20 18 20 DAYS WITH SKY CLEAR (0-2)/8 18 18 19 15 20 28 30 27 28 20 21 10 254 DAYS WITH P.CLOUDY (3-6)/8 5 3 7 13 8 2 1 4 2 9 6 11 71 DAYS WITH CLOUDY (7-8)/8 8 7 5 2 3 0 0 0 0 2 3 10 40 DAYS WITH VISIBILITY =< 2 KM 9 6 4 0 0 0 0 0 0 0 4 8 31 DURATION OF SUNSHINE HOURS 140.5 184.9 240.1 263.0 298.8 349.6 353.7 323.9 301.2 234.8 184.9 110.7 2986.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 770.3 769.2 770.3 771.5 770.6 769.1 769.0 772.3 773.3 774.4 772.9 772.9 771.3 MAX. QFE PRESSURE IN HPA 775.3 776.0 778.0 778.2 775.8 775.3 774.0 775.8 778.0 779.4 779.0 778.5 779.4 DAY-HOUR 14- 6 28-21 1- 6 1- 6 16-21 2- 6 27- 6 5- 0 23- 6 10- 6 4- 6 9- 6 MIN. QFE PRESSURE IN HPA 762.3 760.1 758.9 766.3 765.9 763.9 765.2 768.8 770.0 771.4 760.3 764.0 758.9 DAY-HOUR 27- 0 21-12 25-15 10- 0 4- 0 11-12 12-12 24-12 5-12 2- 0 18-12 5- 0 MEAN QNH PRESSURE IN HPA 1016.9 1015.5 1016.9 1018.4 1017.2 1015.3 1015.2 1019.3 1020.6 1022.0 1020.0 1020.1 1018.1 MAX. QNH PRESSURE IN HPA 1023.1 1024.0 1026.5 1026.7 1023.7 1023.1 1021.5 1023.7 1026.5 1028.2 1027.7 1027.1 1028.2 DAY-HOUR 14- 6 28-21 1- 6 1- 6 16-21 2- 6 27- 6 5- 0 23- 6 10- 6 4- 6 9- 6 MIN. QNH PRESSURE IN HPA 1006.8 1004.1 1002.6 1011.8 1011.3 1008.8 1010.5 1015.0 1016.5 1018.2 1004.3 1008.9 1002.6 DAY-HOUR 27- 0 21-12 25-15 10- 0 4- 0 11-12 12-12 24-12 5-12 2- 0 18-12 5- 0 MEAN QFF PRESSURE IN HPA 1024.2 1019.0 1013.4 1007.4 1002.3 996.2 993.5 998.3 1003.5 1009.0 1015.2 1019.8 1008.5 MAX. QFF PRESSURE IN HPA 1044.2 1031.9 1028.6 1019.2 1009.4 1006.4 1002.4 1006.1 1015.9 1016.3 1029.2 1039.2 1044.2 DAY-HOUR 29- 3 1- 6 2- 3 1- 3 1- 3 2- 3 29- 3 10- 3 24- 3 23-15 20-15 17-18 MIN. QFF PRESSURE IN HPA 1008.4 1003.0 997.0 998.7 993.8 990.6 986.6 991.3 995.0 1001.5 1001.7 1004.8 986.6 DAY-HOUR 23-18 21- 3 25- 0 26-12 29-21 29-21 9- 9 24- 9 5- 9 2-12 18-12 5-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 770.0 768.9 770.0 771.2 770.3 769.1 769.0 772.2 773.3 774.2 772.8 772.8 771.2 MAX. QFE PRESSURE IN HPA 774.1 773.5 776.4 777.4 775.2 773.5 773.4 775.8 777.3 778.1 778.2 777.8 778.2 DAY 14 13 2 2 17 3 28 5 23 10 5 29 MIN. QFE PRESSURE IN HPA 762.3 761.5 759.4 766.3 765.9 765.6 765.2 769.2 770.7 771.4 764.7 764.0 759.4 DAY 27 22 26 10 4 18 18 27 6 2 18 5 MEAN QNH PRESSURE IN HPA 1016.5 1015.1 1016.5 1018.0 1016.8 1015.3 1015.2 1019.3 1020.6 1021.8 1019.9 1020.0 1017.9 MAX. QNH PRESSURE IN HPA 1021.6 1020.8 1024.5 1025.7 1023.0 1020.8 1020.7 1023.7 1025.6 1026.6 1026.7 1026.2 1026.7 DAY 14 13 2 2 17 3 28 5 23 10 5 29 MIN. QNH PRESSURE IN HPA 1006.8 1005.8 1003.2 1011.8 1011.3 1011.0 1010.5 1015.5 1017.3 1018.2 1009.8 1008.9 1003.2 DAY 27 22 26 10 4 18 18 27 6 2 18 5 MEAN QFF PRESSURE IN HPA 1022.5 1017.5 1012.6 1006.7 1002.1 996.7 993.6 998.0 1003.3 1008.1 1014.5 1019.5 1007.9 MAX. QFF PRESSURE IN HPA 1036.0 1028.1 1024.0 1015.6 1007.5 1003.6 999.9 1002.2 1011.7 1012.2 1026.1 1035.8 1036.0 DAY 29 1 1 2 1 2 31 10 23 28 21 18 MIN. QFF PRESSURE IN HPA 1009.3 1005.9 997.0 999.0 994.8 992.2 988.3 993.6 996.9 1003.5 1005.2 1006.2 988.3 DAY 24 21 25 26 30 30 13 27 6 2 18 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 770.1 769.1 770.4 771.5 770.7 769.6 769.5 772.8 773.7 774.6 772.9 772.8 771.5 MAX. QFE PRESSURE IN HPA 774.3 774.4 776.7 777.4 775.5 774.4 774.0 775.8 777.5 778.6 778.4 777.5 778.6 DAY 14 28 1 2 17 2 28 5 23 10 5 28 MIN. QFE PRESSURE IN HPA 762.3 761.0 759.9 766.5 766.0 765.9 765.2 769.2 770.9 772.0 764.5 765.0 759.9 DAY 27 21 26 9 9 18 18 27 6 2 18 5 MEAN QNH PRESSURE IN HPA 1016.6 1015.3 1016.9 1018.4 1017.3 1015.9 1015.8 1020.0 1021.1 1022.2 1020.1 1020.0 1018.3 MAX. QNH PRESSURE IN HPA 1021.9 1022.0 1024.9 1025.7 1023.4 1022.0 1021.5 1023.7 1025.9 1027.2 1027.0 1025.9 1027.2 DAY 14 28 1 2 17 2 28 5 23 10 5 28 MIN. QNH PRESSURE IN HPA 1006.8 1005.2 1003.8 1012.1 1011.5 1011.3 1010.5 1015.5 1017.6 1019.0 1009.6 1010.2 1003.8 DAY 27 21 26 9 9 18 18 27 6 2 18 5 MEAN QFF PRESSURE IN HPA 1025.4 1020.7 1015.3 1009.1 1003.5 998.4 995.7 1001.2 1006.3 1010.9 1016.6 1020.4 1010.3 MAX. QFF PRESSURE IN HPA 1044.2 1031.4 1028.6 1019.2 1009.4 1006.4 1002.4 1006.1 1015.9 1015.9 1028.9 1037.7 1044.2 DAY 29 13 2 1 1 2 29 10 24 16 20 18 MIN. QFF PRESSURE IN HPA 1010.7 1003.0 999.3 1000.9 995.4 993.1 990.8 996.3 1000.1 1005.0 1006.5 1008.9 990.8 DAY 4 21 25 26 30 30 11 24 5 7 18 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 771.1 770.1 771.2 772.2 771.2 769.8 769.6 773.2 774.1 775.4 773.7 773.7 772.1 MAX. QFE PRESSURE IN HPA 775.3 775.9 778.0 778.2 775.4 775.3 774.0 775.8 778.0 779.4 779.0 778.5 779.4 DAY 14 28 1 1 16 2 27 5 23 10 4 9 MIN. QFE PRESSURE IN HPA 763.9 761.9 761.5 767.6 767.1 765.9 765.2 769.1 771.2 773.2 764.8 765.5 761.5 DAY 27 21 25 10 9 18 18 27 1 31 18 5 MEAN QNH PRESSURE IN HPA 1017.9 1016.6 1018.0 1019.2 1017.9 1016.2 1016.0 1020.4 1021.6 1023.2 1021.1 1021.1 1019.1 MAX. QNH PRESSURE IN HPA 1023.1 1023.9 1026.5 1026.7 1023.2 1023.1 1021.5 1023.7 1026.5 1028.2 1027.7 1027.1 1028.2 DAY 14 28 1 1 16 2 27 5 23 10 4 9 MIN. QNH PRESSURE IN HPA 1008.8 1006.3 1005.8 1013.5 1012.8 1011.3 1010.5 1015.3 1018.0 1020.5 1009.9 1010.8 1005.8 DAY 27 21 25 10 9 18 18 27 1 31 18 5 MEAN QFF PRESSURE IN HPA 1026.2 1021.0 1014.6 1007.8 1002.4 996.3 993.4 998.9 1003.7 1010.0 1016.6 1021.2 1009.3 MAX. QFF PRESSURE IN HPA 1044.1 1031.9 1027.4 1017.5 1007.8 1006.3 1000.7 1003.2 1011.9 1015.2 1028.2 1037.9 1044.1 DAY 29 1 1 1 5 2 28 14 24 10 20 18 MIN. QFF PRESSURE IN HPA 1012.1 1005.7 1000.3 1000.3 994.7 991.0 987.3 992.9 997.0 1005.2 1006.9 1005.0 987.3 DAY 4 21 25 26 26 6 11 27 1 2 17 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 770.6 769.7 770.8 771.7 770.8 769.2 769.0 772.4 773.3 774.5 772.9 773.0 771.5 MAX. QFE PRESSURE IN HPA 775.1 775.4 777.5 777.5 775.1 774.1 773.2 775.0 776.7 778.2 778.0 777.6 778.2 DAY 14 28 1 1 16 2 28 5 23 10 4 9 MIN. QFE PRESSURE IN HPA 764.8 761.3 760.6 767.3 766.9 765.7 765.3 768.9 770.7 772.3 762.1 765.1 760.6 DAY 27 21 25 9 26 11 18 27 5 18 18 5 MEAN QNH PRESSURE IN HPA 1017.2 1016.1 1017.4 1018.6 1017.5 1015.4 1015.3 1019.5 1020.6 1022.1 1020.0 1020.2 1018.3 MAX. QNH PRESSURE IN HPA 1022.8 1023.2 1025.9 1025.9 1022.8 1021.6 1020.5 1022.7 1024.9 1026.7 1026.5 1026.0 1026.7 DAY 14 28 1 1 16 2 28 5 23 10 4 9 MIN. QNH PRESSURE IN HPA 1009.9 1005.6 1004.7 1013.1 1012.6 1011.1 1010.6 1015.1 1017.3 1019.3 1006.6 1010.3 1004.7 DAY 27 21 25 9 26 11 18 27 5 18 18 5 MEAN QFF PRESSURE IN HPA 1023.3 1018.5 1012.9 1006.6 1001.8 995.4 992.4 997.2 1002.1 1007.9 1013.9 1019.1 1007.6 MAX. QFF PRESSURE IN HPA 1037.1 1028.0 1024.3 1016.5 1006.4 1003.6 999.6 1001.6 1009.2 1012.5 1025.4 1032.6 1037.1 DAY 29 13 1 1 1 2 31 14 22 29 20 18 MIN. QFF PRESSURE IN HPA 1011.6 1004.7 1002.5 1001.2 994.0 990.7 986.6 991.3 995.0 1003.1 1004.1 1005.3 986.6 DAY 4 21 25 26 26 30 9 24 5 18 18 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 769.7 768.7 769.7 771.1 770.3 768.4 768.4 771.5 772.4 773.7 772.1 772.3 770.7 MAX. QFE PRESSURE IN HPA 773.7 774.7 776.2 776.2 774.2 773.3 772.2 774.1 775.8 776.6 777.2 776.7 777.2 DAY 14 28 1 1 16 3 28 5 22 10 4 9 MIN. QFE PRESSURE IN HPA 764.5 760.1 759.3 766.9 766.6 763.9 765.2 768.8 770.0 771.4 760.3 765.1 759.3 DAY 26 21 25 9 26 11 12 24 5 3 18 5 MEAN QNH PRESSURE IN HPA 1016.0 1014.8 1016.1 1017.9 1016.8 1014.5 1014.4 1018.3 1019.5 1021.1 1019.1 1019.3 1017.3 MAX. QNH PRESSURE IN HPA 1021.1 1022.4 1024.2 1024.2 1021.7 1020.6 1019.2 1021.6 1023.7 1024.7 1025.5 1024.9 1025.5 DAY 14 28 1 1 16 3 28 5 22 10 4 9 MIN. QNH PRESSURE IN HPA 1009.6 1004.1 1003.1 1012.6 1012.2 1008.8 1010.5 1015.0 1016.5 1018.2 1004.3 1010.3 1003.1 DAY 26 21 25 9 26 11 12 24 5 3 18 5 MEAN QFF PRESSURE IN HPA 1021.8 1016.8 1012.1 1006.6 1002.1 995.7 992.7 997.0 1002.2 1007.6 1013.7 1018.6 1007.3 MAX. QFF PRESSURE IN HPA 1034.7 1025.1 1023.1 1014.7 1008.2 1002.1 998.7 999.6 1008.4 1011.8 1025.7 1032.6 1034.7 DAY 29 13 1 1 5 2 28 5 22 27 20 17 MIN. QFF PRESSURE IN HPA 1009.5 1004.6 998.9 998.7 996.2 992.0 988.2 993.3 996.5 1001.5 1001.7 1004.8 988.2 DAY 19 21 25 26 26 29 12 24 5 2 18 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 770.1 768.8 769.8 771.2 770.3 768.3 768.3 771.4 772.7 773.9 772.5 772.7 770.8 MAX. QFE PRESSURE IN HPA 774.2 774.8 776.3 776.4 774.8 772.5 772.3 774.9 777.4 776.9 777.4 777.0 777.4 DAY 14 28 1 1 16 3 28 9 23 10 4 9 MIN. QFE PRESSURE IN HPA 764.3 760.1 758.9 766.9 766.9 764.1 765.3 768.9 770.4 771.6 761.3 766.3 758.9 DAY 26 21 25 9 8 11 17 24 1 1 18 5 MEAN QNH PRESSURE IN HPA 1016.5 1014.9 1016.2 1018.0 1016.8 1014.3 1014.4 1018.2 1019.8 1021.4 1019.7 1019.9 1017.5 MAX. QNH PRESSURE IN HPA 1021.7 1022.5 1024.4 1024.5 1022.5 1019.6 1019.3 1022.6 1025.7 1025.1 1025.7 1025.2 1025.7 DAY 14 28 1 1 16 3 28 9 23 10 4 9 MIN. QNH PRESSURE IN HPA 1009.3 1004.1 1002.6 1012.6 1012.6 1009.1 1010.6 1015.1 1017.0 1018.5 1005.6 1011.8 1002.6 DAY 26 21 25 9 8 11 17 24 1 1 18 5 MEAN QFF PRESSURE IN HPA 1025.3 1020.0 1014.3 1008.7 1003.1 996.8 994.4 999.4 1005.0 1010.3 1016.2 1020.2 1009.5 MAX. QFF PRESSURE IN HPA 1041.0 1030.4 1026.4 1017.9 1007.5 1003.1 1000.2 1004.2 1014.5 1016.3 1029.2 1037.7 1041.0 DAY 29 13 1 1 1 2 29 9 23 23 20 17 MIN. QFF PRESSURE IN HPA 1012.5 1003.5 999.3 1001.2 997.3 992.6 990.2 995.6 999.6 1006.2 1001.9 1008.5 990.2 DAY 19 18 25 26 30 30 10 24 5 1 18 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 770.6 769.5 770.4 771.8 770.8 769.0 769.0 772.3 773.6 774.6 773.1 773.2 771.5 MAX. QFE PRESSURE IN HPA 774.9 775.7 777.2 777.5 775.5 773.1 773.1 775.2 778.0 778.1 778.7 777.7 778.7 DAY 14 28 1 1 16 2 27 9 23 10 4 9 MIN. QFE PRESSURE IN HPA 763.6 761.2 759.5 767.0 766.7 766.1 765.8 769.5 770.8 771.8 761.8 765.8 759.5 DAY 26 21 25 9 3 11 17 24 5 1 18 4 MEAN QNH PRESSURE IN HPA 1017.2 1015.8 1017.0 1018.8 1017.5 1015.3 1015.2 1019.3 1020.9 1022.2 1020.3 1020.5 1018.3 MAX. QNH PRESSURE IN HPA 1022.6 1023.6 1025.5 1025.9 1023.4 1020.3 1020.3 1023.0 1026.5 1026.6 1027.4 1026.1 1027.4 DAY 14 28 1 1 16 2 27 9 23 10 4 9 MIN. QNH PRESSURE IN HPA 1008.4 1005.4 1003.3 1012.7 1012.3 1011.6 1011.2 1015.8 1017.5 1018.7 1006.2 1011.2 1003.3 DAY 26 21 25 9 3 11 17 24 5 1 18 4 MEAN QFF PRESSURE IN HPA 1025.7 1019.9 1013.5 1007.3 1002.1 995.5 993.0 997.9 1003.2 1009.1 1016.0 1020.6 1008.6 MAX. QFF PRESSURE IN HPA 1041.6 1029.2 1026.4 1015.3 1007.3 1002.9 999.8 1001.4 1012.7 1014.4 1027.9 1039.2 1041.6 DAY 28 13 1 1 11 2 27 13 23 23 20 17 MIN. QFF PRESSURE IN HPA 1008.4 1006.4 999.7 1002.7 994.9 990.9 987.7 993.4 997.5 1003.3 1003.5 1008.7 987.7 DAY 23 18 24 26 29 30 10 24 1 1 18 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 770.4 769.4 770.4 771.7 770.7 769.2 769.3 772.4 773.5 774.4 773.0 773.1 771.5 MAX. QFE PRESSURE IN HPA 774.9 776.0 776.9 777.7 775.8 773.9 773.4 775.0 777.8 778.2 778.7 777.8 778.7 DAY 14 28 1 1 16 2 27 4 22 10 4 28 MIN. QFE PRESSURE IN HPA 763.1 761.0 759.5 766.8 766.0 765.9 765.8 769.5 770.8 771.8 764.8 764.3 759.5 DAY 26 21 25 9 3 17 17 24 5 1 18 4 MEAN QNH PRESSURE IN HPA 1017.0 1015.7 1017.0 1018.5 1017.3 1015.5 1015.6 1019.5 1020.9 1022.0 1020.2 1020.3 1018.3 MAX. QNH PRESSURE IN HPA 1022.6 1024.0 1025.1 1026.1 1023.7 1021.3 1020.7 1022.7 1026.2 1026.7 1027.4 1026.2 1027.4 DAY 14 28 1 1 16 2 27 4 22 10 4 28 MIN. QNH PRESSURE IN HPA 1007.8 1005.2 1003.3 1012.5 1011.5 1011.3 1011.2 1015.8 1017.5 1018.7 1009.9 1009.3 1003.3 DAY 26 21 25 9 3 17 17 24 5 1 18 4 MEAN QFF PRESSURE IN HPA 1023.4 1017.9 1012.4 1006.4 1001.6 995.3 992.9 997.2 1002.4 1007.9 1014.2 1019.3 1007.6 MAX. QFF PRESSURE IN HPA 1038.5 1027.1 1024.2 1015.5 1007.7 1003.1 999.6 1001.8 1012.1 1011.7 1024.7 1034.5 1038.5 DAY 28 12 1 1 11 1 27 13 22 23 20 17 MIN. QFF PRESSURE IN HPA 1009.0 1005.1 1001.9 1000.6 993.8 990.6 987.4 992.0 996.1 1002.8 1005.3 1007.1 987.4 DAY 23 20 24 25 29 29 10 23 5 18 11 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.4 -1.0 3.5 7.9 14.6 19.5 21.7 22.1 19.3 13.3 4.0 -1.6 9.9 MINIMUN AIR TEMPERATURE (C) -9.5 -6.6 -1.7 3.2 8.0 11.7 13.3 12.7 10.1 5.3 -0.9 -5.9 3.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 22 17 12 0 0 0 0 0 0 0 4 18 73 DAYS WITH FREEZING MIN.<= 0 29 25 18 7 0 0 0 0 0 0 17 26 122 TEMPERATURE RECORDS LOWEST(C) -22.2 -16.8 -8.6 -1.8 2.6 6.4 9.4 9.2 7.4 1.0 -13.0 -20.0 -22.2 DAY 25 22 2 4 6 8 1 29 20 24 27 23 MAXIMUM AIR TEMPERATURE (C) 1.9 5.5 9.1 12.4 20.2 26.0 29.1 29.8 27.8 21.1 10.1 3.9 16.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 9 17 3 0 0 0 29 DAYS WITH MAXIMUM TEMP. <= 0 8 0 0 0 0 0 0 0 0 0 0 3 11 TEMPERATURE RECORDS HIGHEST(C) 8.2 10.6 14.8 22.0 25.4 28.8 31.6 33.2 31.0 24.6 16.4 8.6 33.2 DAY 7 10 27 28 31 16 20 10 2 9 10 8 DIF. BETWEEN (MAX.-MIN.) (C) 11.4 12.1 10.8 9.2 12.2 14.3 15.8 17.1 17.7 15.8 11.0 9.8 13.1 MEAN DAILY TEMP. (MDT) (C) -3.8 -0.5 3.7 7.8 14.1 18.9 21.2 21.2 19.0 13.2 4.6 -1.0 9.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.5 17.8 24.7 2.8 0.0 0.0 0.0 45.8 HEATING DEG. DAYS(BASE 18 0C) 676.6 518.9 444.0 305.2 124.8 6.3 0.0 0.0 4.0 147.3 401.6 589.3 3218.0 DEWPOINT (MEAN C) -10.4 -8.5 -5.2 -0.8 -1.5 -0.2 2.2 1.2 -1.4 -2.1 -3.2 -8.3 -3.2 MIXING RATIO (G/KG) 2.54 2.74 3.52 4.82 4.64 5.10 6.01 5.52 4.53 4.29 4.10 2.88 4.22 VAPOUR PRESSURE (HPA) 3.12 3.38 4.33 5.91 5.70 6.26 7.37 6.78 5.59 5.31 5.06 3.55 5.20 SATURATION DEF. (HPA) 1.68 2.58 3.78 5.22 11.71 17.21 19.62 21.15 18.09 10.78 3.49 2.18 9.79 RELATIVE HUMIDITY (MEAN %) 66 59 56 58 37 29 30 27 27 37 64 63 46 RELATIVE HUMIDITY (MAX. %) 84 77 73 75 59 47 50 45 45 59 85 81 65 RELATIVE HUMIDITY (MIN. %) 48 43 40 43 23 18 18 16 15 22 43 47 31 RELATIVE HUMIDITY (MEAN% 03UTC) 75 67 64 65 51 46 49 45 45 58 80 68 59 RELATIVE HUMIDITY (MEAN% 09UTC) 58 52 48 49 27 21 21 18 16 23 51 57 37 RELATIVE HUMIDITY (MEAN% 15UTC) 58 55 51 56 30 22 22 19 19 30 55 60 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 237.4 118.1 184.7 329.6 29.2 0.0 2.5 0.0 0.0 4.4 151.5 415.7 1473.1 DAYS WITH PRECIPITATION >=10 6 5 6 8 1 0 0 0 0 0 5 8 39 DAYS WITH PRECIPITATION >= 5 11 6 7 11 3 0 0 0 0 0 7 11 56 DAYS WITH PRECIPITATION >= 1 14 6 8 14 3 0 1 0 0 1 9 13 69 DAYS WITH PRECIPITATION 16 9 10 15 5 1 3 0 0 5 9 15 88 GREATEST DAILY PRECIPITATION 86.0 29.0 68.0 88.0 15.1 0.0 2.0 0.0 0.0 4.0 33.0 131.0 131.0 DAY 7 13 28 2 11 ** 30 ** ** 22 6 10 DAY WITH THUNDER STORM 2 0 3 7 4 0 1 0 0 0 4 6 27 DAYS WITH SNOW OR SLEET 15 9 6 4 0 0 0 0 0 0 6 15 55 DAYS WITH DUST 0 0 0 1 0 0 1 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 270 270 270 270 315 315 315 270 315 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.5 8.1 10.0 9.4 9.4 8.8 8.9 8.9 7.8 8.6 9.4 12.5 9.4 PREVAILING WIND PERCENT 15.3 14.7 19.8 15.8 16.1 12.1 11.3 11.3 12.5 10.9 6.7 12.9 12.5 CALMS PERCENT OF WIND 70.6 67.9 63.7 55.4 46.8 67.5 68.5 69.8 72.5 75.8 84.2 60.9 66.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 282 299 281 295 308 296 287 285 294 294 292 283 292 VECTOR WIND MAGNITUDE(KNOTS) 2.2 2.3 3.1 3.3 3.6 1.8 1.9 1.9 1.7 1.6 1.1 3.2 2.3 WIND STEADINESES (MEAN %) 78.6 79.3 83.8 75.0 66.7 64.3 67.9 76.0 73.9 72.7 78.6 68.1 74.2 WIND SPEED (MEAN KNOTS) 2.8 2.9 3.7 4.4 5.4 2.8 2.8 2.5 2.3 2.2 1.4 4.7 3.1 FASTEST WIND DIRECTION 280 270 270 250 210 330 210 340 270 360 180 240 240 FASTEST WIND SPEED (KNOTS) 33 19 29 29 29 19 19 16 14 17 16 39 39 DAY 11 25 28 3 4 3 16 4 15 1 19 10 DAYS WITH SKY CLEAR (0-2)/8 17 18 18 6 22 28 29 29 29 22 15 12 245 DAYS WITH P.CLOUDY (3-6)/8 8 9 5 13 6 2 2 2 1 8 10 10 76 DAYS WITH CLOUDY (7-8)/8 6 1 8 11 3 0 0 0 0 1 5 9 44 DAYS WITH VISIBILITY =< 2 KM 7 3 0 1 0 0 0 0 0 0 2 8 21 DURATION OF SUNSHINE HOURS 154.4 189.7 215.0 173.3 312.7 362.7 356.9 348.1 301.9 246.9 158.2 126.3 2946.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 769.5 770.9 770.5 769.5 771.1 770.3 770.5 770.3 774.1 775.3 773.5 769.7 771.3 MAX. QFE PRESSURE IN HPA 776.5 779.0 779.5 775.8 775.1 774.2 773.9 773.8 778.7 780.6 779.1 777.1 780.6 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 10-12 25- 6 30-12 29-18 22- 6 10- 6 18- 6 3- 6 MIN. QFE PRESSURE IN HPA 761.2 765.0 761.8 760.4 766.2 765.0 767.4 766.7 769.7 771.3 768.4 760.1 760.1 DAY-HOUR 21-12 25- 3 28-12 3- 3 4- 9 21-12 23-15 17-15 18-12 21-12 26- 0 21-12 MEAN QNH PRESSURE IN HPA 1015.9 1017.6 1017.0 1015.8 1017.8 1016.9 1017.1 1016.9 1021.6 1023.1 1020.9 1016.1 1018.1 MAX. QNH PRESSURE IN HPA 1024.6 1027.7 1028.4 1023.7 1022.8 1021.7 1021.3 1021.2 1027.4 1029.7 1027.9 1025.4 1029.7 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 10-12 25- 6 30-12 29-18 22- 6 10- 6 18- 6 3- 6 MIN. QNH PRESSURE IN HPA 1005.4 1010.2 1006.2 1004.4 1011.7 1010.2 1013.2 1012.3 1016.1 1018.1 1014.5 1004.1 1004.1 DAY-HOUR 21-12 25- 3 28-12 3- 3 4- 9 21-12 23-15 17-15 18-12 21-12 26- 0 21-12 MEAN QFF PRESSURE IN HPA 1020.1 1018.5 1013.3 1007.5 1003.5 998.1 996.4 995.8 1003.2 1010.1 1016.7 1017.4 1008.4 MAX. QFF PRESSURE IN HPA 1040.8 1036.1 1029.0 1018.3 1010.0 1004.7 1005.2 1004.6 1012.0 1017.1 1029.1 1032.6 1040.8 DAY-HOUR 25- 6 6- 3 11- 3 1- 3 11- 0 8- 3 31- 0 30- 3 21- 3 27- 3 28- 3 30- 6 MIN. QFF PRESSURE IN HPA 1002.0 1004.7 997.6 993.5 995.6 991.2 989.6 990.3 997.7 1004.4 1004.1 998.9 989.6 DAY-HOUR 11-18 25- 3 28-15 3- 3 20- 0 21-12 23-21 7- 9 10- 9 21-21 12-12 21- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 769.4 770.5 770.2 768.9 770.6 770.2 770.4 770.2 774.1 775.3 773.4 769.5 771.0 MAX. QFE PRESSURE IN HPA 775.1 777.7 778.2 773.3 774.2 773.4 773.3 773.0 777.5 779.3 777.9 775.3 779.3 DAY 26 6 12 1 11 25 30 30 21 11 19 3 MIN. QFE PRESSURE IN HPA 762.5 765.5 764.3 761.2 767.3 765.3 767.6 767.3 771.3 771.6 768.4 761.1 761.1 DAY 12 25 21 4 5 21 24 17 18 22 26 22 MEAN QNH PRESSURE IN HPA 1015.7 1017.1 1016.7 1015.1 1017.2 1016.8 1017.0 1016.8 1021.6 1023.1 1020.7 1015.9 1017.8 MAX. QNH PRESSURE IN HPA 1022.8 1026.1 1026.7 1020.6 1021.7 1020.7 1020.6 1020.2 1025.9 1028.1 1026.4 1023.1 1028.1 DAY 26 6 12 1 11 25 30 30 21 11 19 3 MIN. QNH PRESSURE IN HPA 1007.1 1010.8 1009.3 1005.4 1013.1 1010.6 1013.5 1013.1 1018.1 1018.5 1014.5 1005.3 1005.3 DAY 12 25 21 4 5 21 24 17 18 22 26 22 MEAN QFF PRESSURE IN HPA 1019.2 1017.2 1012.8 1006.5 1002.9 998.2 996.5 996.0 1003.0 1009.8 1015.9 1016.9 1007.9 MAX. QFF PRESSURE IN HPA 1035.9 1032.4 1025.1 1014.6 1010.0 1003.5 1005.2 1003.0 1009.1 1013.5 1026.6 1028.9 1035.9 DAY 25 6 11 1 11 1 31 1 21 27 28 30 MIN. QFF PRESSURE IN HPA 1006.2 1005.5 1002.1 995.7 995.6 991.4 990.5 991.8 999.3 1004.9 1005.5 1002.9 990.5 DAY 8 25 21 3 20 20 24 14 10 22 12 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 769.4 770.6 770.3 769.2 770.9 770.7 770.9 770.8 774.6 775.6 773.7 769.4 771.3 MAX. QFE PRESSURE IN HPA 775.1 777.7 778.6 774.5 774.3 773.8 773.4 773.4 778.0 779.8 778.0 776.3 779.8 DAY 26 6 11 1 25 25 29 30 22 10 18 3 MIN. QFE PRESSURE IN HPA 762.9 765.0 765.0 760.4 766.9 765.5 767.6 767.5 771.3 771.5 768.8 760.9 760.4 DAY 12 25 21 3 4 21 24 17 18 22 26 21 MEAN QNH PRESSURE IN HPA 1015.7 1017.2 1016.9 1015.4 1017.6 1017.3 1017.6 1017.4 1022.2 1023.5 1021.1 1015.7 1018.1 MAX. QNH PRESSURE IN HPA 1022.8 1026.1 1027.2 1022.1 1021.9 1021.2 1020.7 1020.7 1026.5 1028.7 1026.5 1024.4 1028.7 DAY 26 6 11 1 25 25 29 30 22 10 18 3 MIN. QNH PRESSURE IN HPA 1007.6 1010.2 1010.2 1004.4 1012.6 1010.8 1013.5 1013.3 1018.1 1018.3 1015.0 1005.1 1004.4 DAY 12 25 21 3 4 21 24 17 18 22 26 21 MEAN QFF PRESSURE IN HPA 1021.0 1019.6 1014.5 1008.2 1004.5 999.8 998.3 998.5 1006.3 1012.8 1018.2 1017.9 1010.0 MAX. QFF PRESSURE IN HPA 1040.5 1036.1 1029.0 1018.3 1009.6 1004.7 1004.8 1004.6 1012.0 1017.1 1029.1 1031.8 1040.5 DAY 25 6 11 1 11 8 31 30 21 27 28 30 MIN. QFF PRESSURE IN HPA 1005.7 1004.7 1000.5 993.5 996.4 992.9 992.2 993.7 1002.0 1005.4 1007.8 1000.4 992.2 DAY 8 25 28 3 20 20 24 14 6 22 13 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 770.4 771.6 771.2 769.8 771.4 771.0 771.2 771.1 775.2 776.4 774.5 770.5 772.0 MAX. QFE PRESSURE IN HPA 776.5 779.0 779.5 775.8 774.5 774.2 773.6 773.8 778.7 780.6 779.1 777.1 780.6 DAY 26 6 11 1 11 25 31 30 22 10 18 3 MIN. QFE PRESSURE IN HPA 764.1 766.3 765.3 760.7 766.7 765.8 767.8 767.8 771.8 772.7 769.2 761.5 760.7 DAY 22 25 28 3 4 21 24 17 18 22 26 21 MEAN QNH PRESSURE IN HPA 1016.9 1018.4 1018.0 1016.2 1018.2 1017.7 1018.0 1017.8 1022.9 1024.4 1022.1 1017.1 1019.0 MAX. QNH PRESSURE IN HPA 1024.6 1027.7 1028.4 1023.7 1022.1 1021.7 1021.0 1021.2 1027.4 1029.7 1027.9 1025.4 1029.7 DAY 26 6 11 1 11 25 31 30 22 10 18 3 MIN. QNH PRESSURE IN HPA 1009.1 1011.8 1010.6 1004.8 1012.3 1011.2 1013.7 1013.7 1018.7 1019.8 1015.5 1005.8 1004.8 DAY 22 25 28 3 4 21 24 17 18 22 26 21 MEAN QFF PRESSURE IN HPA 1021.8 1020.0 1014.2 1008.0 1003.4 998.2 996.3 995.9 1003.8 1010.8 1018.0 1018.8 1009.1 MAX. QFF PRESSURE IN HPA 1040.8 1036.0 1027.6 1016.6 1010.0 1003.2 1003.2 1002.0 1009.7 1015.2 1028.6 1032.6 1040.8 DAY 25 6 11 1 11 25 31 29 21 26 27 30 MIN. QFF PRESSURE IN HPA 1008.8 1006.9 1003.1 995.5 997.2 992.3 990.3 991.7 999.2 1006.5 1006.8 1002.2 990.3 DAY 11 25 28 3 20 19 23 7 10 21 13 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 769.8 771.3 770.7 769.8 771.3 770.5 770.5 770.3 774.1 775.2 773.5 769.8 771.4 MAX. QFE PRESSURE IN HPA 775.8 778.4 778.5 775.3 774.1 773.1 772.9 772.8 777.5 779.2 778.2 776.4 779.2 DAY 26 6 11 1 17 4 3 30 21 10 18 3 MIN. QFE PRESSURE IN HPA 763.2 766.8 763.3 760.6 766.2 765.8 767.6 767.2 771.0 772.3 769.3 760.4 760.4 DAY 21 20 28 3 4 21 24 17 18 21 26 21 MEAN QNH PRESSURE IN HPA 1016.2 1018.1 1017.4 1016.2 1018.0 1017.1 1017.1 1016.9 1021.6 1022.9 1020.9 1016.2 1018.2 MAX. QNH PRESSURE IN HPA 1023.7 1027.0 1027.1 1023.1 1021.6 1020.3 1020.1 1020.0 1025.9 1028.0 1026.7 1024.5 1028.0 DAY 26 6 11 1 17 4 3 30 21 10 18 3 MIN. QNH PRESSURE IN HPA 1007.9 1012.5 1008.1 1004.7 1011.7 1011.2 1013.5 1013.0 1017.7 1019.3 1015.6 1004.4 1004.4 DAY 21 20 28 3 4 21 24 17 18 21 26 21 MEAN QFF PRESSURE IN HPA 1019.4 1017.9 1012.8 1007.4 1003.2 997.5 995.1 994.3 1001.5 1008.4 1015.8 1016.7 1007.5 MAX. QFF PRESSURE IN HPA 1037.3 1032.9 1024.3 1015.5 1008.8 1002.6 999.5 1000.8 1007.4 1011.7 1025.9 1027.3 1037.3 DAY 25 6 11 1 11 4 31 30 21 27 27 30 MIN. QFF PRESSURE IN HPA 1006.9 1008.6 1001.4 996.7 998.7 992.3 989.7 990.3 997.7 1005.4 1005.0 998.9 989.7 DAY 21 25 28 3 20 20 22 7 10 21 12 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 768.9 770.3 769.8 769.3 770.9 769.8 770.0 769.7 773.2 774.4 772.7 769.1 770.7 MAX. QFE PRESSURE IN HPA 775.1 776.9 777.2 774.5 775.1 772.6 773.9 772.2 776.5 778.2 777.1 775.5 778.2 DAY 27 6 11 1 10 4 30 29 21 10 18 3 MIN. QFE PRESSURE IN HPA 761.2 766.2 761.8 761.2 766.6 765.0 767.5 766.9 769.7 771.3 769.0 760.1 760.1 DAY 21 20 28 3 4 21 22 17 18 21 25 21 MEAN QNH PRESSURE IN HPA 1015.1 1016.9 1016.2 1015.6 1017.6 1016.2 1016.5 1016.1 1020.5 1022.0 1019.8 1015.4 1017.3 MAX. QNH PRESSURE IN HPA 1022.8 1025.1 1025.5 1022.1 1022.8 1019.7 1021.3 1019.2 1024.6 1026.7 1025.4 1023.4 1026.7 DAY 27 6 11 1 10 4 30 29 21 10 18 3 MIN. QNH PRESSURE IN HPA 1005.4 1011.7 1006.2 1005.4 1012.2 1010.2 1013.3 1012.6 1016.1 1018.1 1015.2 1004.1 1004.1 DAY 21 20 28 3 4 21 22 17 18 21 25 21 MEAN QFF PRESSURE IN HPA 1018.7 1016.7 1012.1 1007.0 1003.3 997.5 996.1 995.1 1001.9 1009.0 1015.1 1016.3 1007.4 MAX. QFF PRESSURE IN HPA 1034.6 1030.0 1024.7 1015.0 1007.5 1002.7 1004.5 1001.8 1007.5 1013.4 1025.2 1026.5 1034.6 DAY 25 6 11 1 10 5 31 29 21 31 27 30 MIN. QFF PRESSURE IN HPA 1004.8 1006.9 998.9 998.9 997.6 991.2 990.9 990.9 998.2 1004.6 1004.1 1000.1 990.9 DAY 7 25 28 3 21 21 22 6 18 21 12 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 769.3 770.6 769.9 769.3 770.9 769.7 770.0 769.7 773.4 774.8 773.1 769.6 770.9 MAX. QFE PRESSURE IN HPA 775.7 777.0 777.1 774.8 774.1 772.8 773.3 772.5 776.6 778.5 777.4 775.7 778.5 DAY 27 6 11 1 17 25 30 29 21 10 18 3 MIN. QFE PRESSURE IN HPA 761.7 766.7 762.1 761.5 767.4 765.4 767.4 766.7 770.3 771.3 768.8 760.2 760.2 DAY 21 20 28 3 4 21 23 17 18 21 25 21 MEAN QNH PRESSURE IN HPA 1015.6 1017.2 1016.3 1015.6 1017.6 1016.1 1016.4 1016.1 1020.8 1022.4 1020.4 1015.9 1017.5 MAX. QNH PRESSURE IN HPA 1023.6 1025.2 1025.4 1022.5 1021.6 1020.0 1020.6 1019.6 1024.7 1027.1 1025.7 1023.6 1027.1 DAY 27 6 11 1 17 25 30 29 21 10 18 3 MIN. QNH PRESSURE IN HPA 1006.1 1012.3 1006.6 1005.8 1013.2 1010.7 1013.2 1012.3 1016.8 1018.1 1015.0 1004.2 1004.2 DAY 21 20 28 3 4 21 23 17 18 21 25 21 MEAN QFF PRESSURE IN HPA 1020.9 1019.5 1013.7 1008.3 1004.4 998.6 997.3 997.1 1004.9 1011.8 1017.6 1018.1 1009.4 MAX. QFF PRESSURE IN HPA 1039.6 1033.8 1025.9 1017.6 1008.4 1004.5 1004.0 1003.7 1009.7 1016.9 1028.5 1030.6 1039.6 DAY 25 6 11 1 23 25 30 29 21 26 27 30 MIN. QFF PRESSURE IN HPA 1002.2 1006.5 997.6 1000.0 998.0 992.4 992.3 993.1 1001.2 1006.7 1005.2 1000.9 992.3 DAY 11 25 28 3 21 20 22 14 7 21 12 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 769.8 771.2 770.8 769.9 771.4 770.5 770.7 770.5 774.3 775.5 773.7 770.0 771.5 MAX. QFE PRESSURE IN HPA 776.1 777.5 778.1 775.2 774.6 773.5 773.7 773.8 777.3 779.3 778.5 775.5 779.3 DAY 26 6 11 1 17 4 30 29 21 10 18 3 MIN. QFE PRESSURE IN HPA 762.5 766.9 762.4 762.0 767.9 766.4 768.1 767.8 771.1 771.6 768.8 761.2 761.2 DAY 11 13 22 3 4 20 23 6 18 21 25 21 MEAN QNH PRESSURE IN HPA 1016.2 1018.0 1017.5 1016.3 1018.3 1017.1 1017.4 1017.0 1021.9 1023.3 1021.2 1016.5 1018.4 MAX. QNH PRESSURE IN HPA 1024.1 1025.9 1026.6 1023.0 1022.2 1020.8 1021.1 1021.2 1025.6 1028.1 1027.1 1023.4 1028.1 DAY 26 6 11 1 17 4 30 29 21 10 18 3 MIN. QNH PRESSURE IN HPA 1007.1 1012.6 1006.9 1006.4 1013.8 1012.0 1014.1 1013.7 1017.8 1018.5 1015.0 1005.4 1005.4 DAY 11 13 22 3 4 20 23 6 18 21 25 21 MEAN QFF PRESSURE IN HPA 1021.2 1019.5 1013.6 1008.1 1003.4 997.8 996.0 995.3 1002.8 1009.8 1017.2 1018.3 1008.6 MAX. QFF PRESSURE IN HPA 1039.8 1033.3 1024.4 1015.0 1006.8 1002.7 1002.4 1002.2 1008.0 1014.3 1028.9 1030.0 1039.8 DAY 25 5 11 1 16 3 30 29 21 26 27 14 MIN. QFF PRESSURE IN HPA 1002.0 1009.2 1000.8 1002.0 998.4 992.6 990.5 991.5 998.1 1005.1 1004.7 1004.3 990.5 DAY 11 13 28 18 19 18 23 6 10 21 12 21 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 769.5 771.0 770.8 769.6 771.2 770.5 770.7 770.4 774.3 775.5 773.6 769.7 771.4 MAX. QFE PRESSURE IN HPA 775.7 777.5 778.6 775.6 774.9 773.4 773.6 773.7 777.4 779.3 778.0 775.5 779.3 DAY 27 6 11 1 10 24 29 31 20 10 18 2 MIN. QFE PRESSURE IN HPA 761.4 766.0 763.8 761.3 767.7 766.0 767.7 767.5 771.3 771.9 768.6 760.5 760.5 DAY 11 13 22 3 4 20 23 17 9 21 25 21 MEAN QNH PRESSURE IN HPA 1015.8 1017.7 1017.4 1015.9 1018.0 1017.1 1017.3 1017.0 1021.9 1023.3 1021.0 1016.1 1018.2 MAX. QNH PRESSURE IN HPA 1023.6 1025.9 1027.2 1023.5 1022.6 1020.7 1021.0 1021.1 1025.7 1028.1 1026.5 1023.4 1028.1 DAY 27 6 11 1 10 24 29 31 20 10 18 2 MIN. QNH PRESSURE IN HPA 1005.7 1011.5 1008.7 1005.6 1013.6 1011.5 1013.6 1013.3 1018.1 1018.8 1014.7 1004.6 1004.6 DAY 11 13 22 3 4 20 23 17 9 21 25 21 MEAN QFF PRESSURE IN HPA 1019.2 1017.5 1012.8 1007.0 1003.0 997.5 995.4 994.5 1001.9 1008.8 1016.0 1016.8 1007.5 MAX. QFF PRESSURE IN HPA 1036.3 1032.3 1023.5 1013.9 1009.0 1002.8 1001.1 1000.8 1007.6 1011.9 1026.3 1027.2 1036.3 DAY 25 5 11 1 10 4 30 29 20 26 27 5 MIN. QFF PRESSURE IN HPA 1002.1 1007.3 1002.8 998.2 998.2 992.0 989.6 990.7 998.0 1004.4 1006.6 1002.2 989.6 DAY 7 13 20 2 19 18 23 7 9 21 11 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.8 -1.0 2.3 9.5 13.5 19.5 23.5 22.8 18.4 13.6 5.7 1.3 10.4 MINIMUN AIR TEMPERATURE (C) -9.3 -5.4 -2.5 4.2 6.3 10.9 14.3 13.7 9.6 6.5 -0.5 -2.6 3.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 26 12 7 0 0 0 0 0 0 0 7 13 65 DAYS WITH FREEZING MIN.<= 0 29 25 21 3 2 0 0 0 0 0 15 21 116 TEMPERATURE RECORDS LOWEST(C) -20.6 -16.8 -13.6 -2.4 -0.8 7.0 8.6 11.6 5.8 2.6 -7.0 -10.8 -20.6 DAY 18 18 2 2 1 7 2 25 14 24 24 13 MAXIMUM AIR TEMPERATURE (C) 3.0 4.4 7.4 14.9 19.7 26.4 31.3 30.5 26.2 20.3 12.7 6.1 16.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 26 22 0 0 0 0 51 DAYS WITH MAXIMUM TEMP. <= 0 9 0 0 0 0 0 0 0 0 0 0 2 11 TEMPERATURE RECORDS HIGHEST(C) 9.8 9.0 12.0 21.4 22.8 30.6 33.4 32.5 29.8 23.6 19.6 11.2 33.4 DAY 13 24 25 7 19 28 10 15 1 10 6 18 DIF. BETWEEN (MAX.-MIN.) (C) 12.3 9.8 9.9 10.7 13.4 15.5 17.0 16.8 16.6 13.8 13.2 8.7 13.1 MEAN DAILY TEMP. (MDT) (C) -3.1 -0.5 2.5 9.6 13.0 18.6 22.8 22.1 17.9 13.4 6.1 1.8 10.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.6 63.0 36.3 0.0 0.0 0.0 0.0 99.9 HEATING DEG. DAYS(BASE 18 0C) 654.9 518.8 481.2 252.9 154.5 11.9 0.7 0.0 27.5 143.4 357.0 503.5 3106.3 DEWPOINT (MEAN C) -11.1 -9.5 -7.5 -1.6 -0.3 0.8 3.6 2.6 -1.4 -1.7 -5.7 -7.9 -3.3 MIXING RATIO (G/KG) 2.24 2.60 3.02 4.58 4.96 5.39 6.59 6.11 4.56 4.45 3.48 2.94 4.24 VAPOUR PRESSURE (HPA) 2.76 3.19 3.70 5.63 6.11 6.61 8.05 7.50 5.62 5.51 4.30 3.62 5.22 SATURATION DEF. (HPA) 2.23 2.77 3.77 6.66 9.96 17.01 22.34 21.41 16.61 10.66 5.32 3.32 10.17 RELATIVE HUMIDITY (MEAN %) 61 55 51 50 42 31 29 28 28 38 48 54 43 RELATIVE HUMIDITY (MAX. %) 77 71 70 71 66 50 48 45 46 57 72 73 62 RELATIVE HUMIDITY (MIN. %) 45 39 35 32 26 20 19 18 18 24 30 37 29 RELATIVE HUMIDITY (MEAN% 03UTC) 71 58 57 63 62 49 48 45 45 52 64 61 56 RELATIVE HUMIDITY (MEAN% 09UTC) 55 47 44 40 31 21 20 20 19 26 33 44 33 RELATIVE HUMIDITY (MEAN% 15UTC) 54 54 50 44 33 23 21 22 20 31 43 49 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 167.8 309.2 316.6 203.8 20.6 0.2 0.0 0.0 0.0 21.2 86.1 284.6 1410.1 DAYS WITH PRECIPITATION >=10 4 9 6 7 1 0 0 0 0 1 3 8 39 DAYS WITH PRECIPITATION >= 5 7 11 8 8 1 0 0 0 0 1 5 10 51 DAYS WITH PRECIPITATION >= 1 10 13 13 12 3 0 0 0 0 3 5 14 73 DAYS WITH PRECIPITATION 10 16 15 14 5 2 0 0 0 6 7 16 91 GREATEST DAILY PRECIPITATION 77.4 72.0 117.2 46.0 15.0 0.1 0.0 0.0 0.0 17.0 36.0 66.0 117.2 DAY 28 4 26 22 8 2 ** ** ** 30 29 27 DAY WITH THUNDER STORM 0 2 5 7 0 0 0 0 0 0 0 2 16 DAYS WITH SNOW OR SLEET 9 12 10 1 0 0 0 0 0 0 2 13 47 DAYS WITH DUST 0 4 1 0 7 2 3 0 0 0 0 0 17 WIND DIRECTION (PREVAILING) 315 270 270 270 315 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 12.0 12.3 12.7 10.1 8.2 7.8 7.8 7.9 8.8 8.5 8.8 8.3 9.7 PREVAILING WIND PERCENT 6.9 19.6 16.9 12.9 7.7 8.3 13.3 8.1 10.4 12.1 8.3 10.5 11.0 CALMS PERCENT OF WIND 79.8 51.8 53.2 62.5 76.6 77.1 74.2 83.1 78.8 75.0 82.1 77.4 72.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 299 288 285 294 308 290 246 255 252 259 283 247 279 VECTOR WIND MAGNITUDE(KNOTS) 1.6 4.1 3.8 2.5 1.3 1.4 1.5 1.0 1.5 1.6 1.3 1.5 1.8 WIND STEADINESES (MEAN %) 66.7 73.2 71.7 65.8 65.0 73.7 68.2 71.4 78.9 72.7 76.5 71.4 66.7 WIND SPEED (MEAN KNOTS) 2.4 5.6 5.3 3.8 2.0 1.9 2.2 1.4 1.9 2.2 1.7 2.1 2.7 FASTEST WIND DIRECTION 330 320 210 330 340 350 280 240 340 220 310 120 210 FASTEST WIND SPEED (KNOTS) 19 33 54 29 16 29 14 16 23 19 25 27 54 DAY 7 5 26 27 13 1 8 14 30 5 20 6 DAYS WITH SKY CLEAR (0-2)/8 17 13 12 9 19 25 31 30 30 24 19 14 243 DAYS WITH P.CLOUDY (3-6)/8 8 5 9 11 11 5 0 1 0 6 8 12 76 DAYS WITH CLOUDY (7-8)/8 6 10 10 10 1 0 0 0 0 1 3 5 46 DAYS WITH VISIBILITY =< 2 KM 10 11 6 4 0 0 0 0 0 0 1 5 37 DURATION OF SUNSHINE HOURS 160.5 151.3 190.2 199.2 295.8 350.1 360.0 343.5 311.4 253.0 205.5 157.6 2978.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 770.3 767.3 768.5 771.5 772.5 769.9 768.3 771.3 772.7 775.0 773.2 772.2 771.1 MAX. QFE PRESSURE IN HPA 779.1 774.2 774.8 779.0 775.9 775.3 773.6 774.9 777.4 779.6 780.3 776.6 780.3 DAY-HOUR 12- 6 6-18 3- 6 8- 3 10-18 2-12 3- 6 12- 3 23- 6 15- 6 25- 6 30- 6 MIN. QFE PRESSURE IN HPA 756.3 758.9 758.6 766.3 767.2 764.6 764.1 768.4 768.5 771.4 768.9 763.1 756.3 DAY-HOUR 28-12 19- 0 26- 9 14- 3 29- 3 30-12 26- 9 1-15 7-12 26-12 14-21 6-12 MEAN QNH PRESSURE IN HPA 1016.9 1013.1 1014.5 1018.3 1019.6 1016.4 1014.3 1018.1 1019.9 1022.7 1020.5 1019.2 1017.8 MAX. QNH PRESSURE IN HPA 1027.9 1021.7 1022.5 1027.7 1023.9 1023.1 1021.0 1022.6 1025.7 1028.5 1029.4 1024.7 1029.4 DAY-HOUR 12- 6 6-18 3- 6 8- 3 10-18 2-12 3- 6 12- 3 23- 6 15- 6 25- 6 30- 6 MIN. QNH PRESSURE IN HPA 999.3 1002.6 1002.2 1011.8 1013.0 1009.7 1009.1 1014.5 1014.6 1018.2 1015.1 1007.8 999.3 DAY-HOUR 28-12 19- 0 26- 9 14- 3 29- 3 30-12 26- 9 1-15 7-12 26-12 14-21 6-12 MEAN QFF PRESSURE IN HPA 1020.6 1013.7 1011.9 1008.7 1006.4 997.6 991.8 996.4 1002.2 1009.5 1014.7 1017.7 1007.6 MAX. QFF PRESSURE IN HPA 1038.0 1029.8 1029.9 1018.4 1015.3 1008.5 1003.0 1003.6 1011.4 1018.5 1028.3 1029.8 1038.0 DAY-HOUR 31- 6 7- 3 2-15 3- 3 9- 3 2-12 3- 3 12- 3 27- 3 16- 3 25- 3 13- 6 MIN. QFF PRESSURE IN HPA 998.2 999.5 995.5 1000.4 996.8 989.6 985.7 991.2 993.5 1001.9 1006.1 1005.4 985.7 DAY-HOUR 28-12 20-12 26- 9 20-15 29- 9 30- 6 26- 9 2- 9 7- 9 2- 0 2- 9 6- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 770.1 767.1 768.0 771.1 772.3 769.9 768.1 771.3 772.6 774.8 773.2 772.0 770.9 MAX. QFE PRESSURE IN HPA 777.6 773.1 774.1 778.9 774.8 774.1 772.2 774.4 776.3 778.2 779.0 775.4 779.0 DAY 12 7 3 8 22 4 4 12 23 15 26 31 MIN. QFE PRESSURE IN HPA 762.8 758.9 759.2 766.9 767.6 765.5 764.4 768.5 769.4 772.5 769.2 765.1 758.9 DAY 16 19 13 22 29 30 26 1 8 28 15 28 MEAN QNH PRESSURE IN HPA 1016.6 1012.8 1014.0 1017.9 1019.3 1016.3 1014.1 1018.1 1019.8 1022.5 1020.4 1019.0 1017.6 MAX. QNH PRESSURE IN HPA 1026.0 1020.3 1021.6 1027.6 1022.5 1021.6 1019.2 1022.0 1024.4 1026.7 1027.7 1023.2 1027.7 DAY 12 7 3 8 22 4 4 12 23 15 26 31 MIN. QNH PRESSURE IN HPA 1007.4 1002.6 1002.9 1012.6 1013.5 1010.8 1009.4 1014.6 1015.7 1019.6 1015.5 1010.3 1002.6 DAY 16 19 13 22 29 30 26 1 8 28 15 28 MEAN QFF PRESSURE IN HPA 1019.3 1012.8 1011.2 1008.0 1006.3 998.0 992.0 996.5 1001.9 1009.0 1014.1 1017.0 1007.2 MAX. QFF PRESSURE IN HPA 1030.1 1026.6 1025.8 1014.1 1013.0 1005.4 1000.7 1000.7 1007.9 1014.8 1024.4 1027.8 1030.1 DAY 31 1 3 4 9 4 3 12 27 16 25 13 MIN. QFF PRESSURE IN HPA 1005.4 1000.8 997.8 1001.8 997.6 991.3 987.8 993.4 995.9 1001.9 1007.4 1006.7 987.8 DAY 16 19 13 21 29 21 25 21 8 2 9 28 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 770.1 767.1 768.1 771.4 772.7 770.2 768.7 771.9 773.2 775.3 773.4 772.0 771.2 MAX. QFE PRESSURE IN HPA 777.7 772.9 774.1 779.0 775.7 774.7 773.4 774.9 777.1 778.8 779.1 775.6 779.1 DAY 12 7 3 8 21 4 3 12 23 15 25 31 MIN. QFE PRESSURE IN HPA 762.9 759.3 760.5 766.3 767.2 765.3 764.8 768.7 770.0 772.7 769.9 764.8 759.3 DAY 28 19 13 14 29 30 1 1 8 26 20 6 MEAN QNH PRESSURE IN HPA 1016.5 1012.8 1014.1 1018.2 1019.9 1016.7 1014.9 1018.9 1020.4 1023.0 1020.7 1019.0 1017.9 MAX. QNH PRESSURE IN HPA 1026.1 1020.1 1021.6 1027.7 1023.6 1022.4 1020.7 1022.6 1025.4 1027.5 1027.9 1023.5 1027.9 DAY 12 7 3 8 21 4 3 12 23 15 25 31 MIN. QNH PRESSURE IN HPA 1007.6 1003.1 1004.6 1011.8 1013.0 1010.6 1009.9 1014.8 1016.5 1019.8 1016.3 1009.9 1003.1 DAY 28 19 13 14 29 30 1 1 8 26 20 6 MEAN QFF PRESSURE IN HPA 1021.6 1014.5 1012.8 1009.7 1008.1 999.3 994.3 999.2 1005.1 1011.7 1016.7 1018.3 1009.3 MAX. QFF PRESSURE IN HPA 1034.9 1029.8 1029.5 1018.4 1015.3 1007.2 1003.0 1003.6 1011.4 1018.5 1028.3 1029.4 1034.9 DAY 31 7 3 3 9 3 3 12 27 16 25 13 MIN. QFF PRESSURE IN HPA 1007.9 1003.4 999.7 1002.4 996.8 992.3 989.3 995.8 998.9 1004.7 1009.2 1005.4 989.3 DAY 16 19 26 22 29 30 26 21 8 2 9 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 771.1 768.0 769.0 772.1 773.1 770.3 768.9 772.2 773.6 776.0 774.2 773.0 771.8 MAX. QFE PRESSURE IN HPA 779.1 773.9 774.8 778.7 775.9 774.0 773.6 774.6 777.4 779.6 780.3 776.6 780.3 DAY 12 7 3 8 21 4 3 12 23 15 25 30 MIN. QFE PRESSURE IN HPA 761.9 760.6 759.8 766.3 767.2 765.1 764.9 769.2 770.1 773.0 770.1 764.2 759.8 DAY 28 19 26 14 29 30 26 1 7 27 20 6 MEAN QNH PRESSURE IN HPA 1017.9 1013.9 1015.2 1019.0 1020.4 1016.8 1015.0 1019.3 1020.9 1023.9 1021.7 1020.2 1018.7 MAX. QNH PRESSURE IN HPA 1027.9 1021.3 1022.5 1027.4 1023.9 1021.5 1021.0 1022.2 1025.7 1028.5 1029.4 1024.7 1029.4 DAY 12 7 3 8 21 4 3 12 23 15 25 30 MIN. QNH PRESSURE IN HPA 1006.3 1004.7 1003.7 1011.8 1013.0 1010.3 1010.1 1015.5 1016.6 1020.2 1016.6 1009.2 1003.7 DAY 28 19 26 14 29 30 26 1 7 27 20 6 MEAN QFF PRESSURE IN HPA 1022.4 1014.9 1012.9 1009.3 1006.4 997.0 991.5 996.8 1002.5 1010.3 1016.0 1019.0 1008.2 MAX. QFF PRESSURE IN HPA 1038.0 1028.9 1028.3 1016.5 1013.3 1004.3 1000.0 1000.8 1009.3 1015.5 1027.4 1029.8 1038.0 DAY 31 7 3 3 9 4 3 12 27 23 25 13 MIN. QFF PRESSURE IN HPA 1011.0 1002.6 998.1 1001.3 996.8 989.6 986.4 992.6 995.8 1004.8 1008.2 1006.6 986.4 DAY 28 20 26 22 29 30 25 1 7 1 9 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 770.5 767.6 768.8 771.8 772.6 769.9 768.2 771.3 772.7 775.1 773.1 772.2 771.2 MAX. QFE PRESSURE IN HPA 777.9 774.0 774.0 778.6 775.3 773.8 772.8 774.0 776.2 778.6 778.8 775.1 778.8 DAY 12 6 3 8 10 3 3 11 23 15 25 22 MIN. QFE PRESSURE IN HPA 759.4 760.2 758.6 766.5 767.3 764.8 764.1 768.7 769.3 771.9 769.4 764.4 758.6 DAY 28 20 26 14 29 30 26 1 7 26 20 6 MEAN QNH PRESSURE IN HPA 1017.1 1013.5 1015.0 1018.7 1019.8 1016.4 1014.2 1018.1 1019.8 1022.8 1020.3 1019.3 1017.9 MAX. QNH PRESSURE IN HPA 1026.4 1021.5 1021.5 1027.2 1023.1 1021.2 1020.0 1021.5 1024.2 1027.2 1027.5 1022.8 1027.5 DAY 12 6 3 8 10 3 3 11 23 15 25 22 MIN. QNH PRESSURE IN HPA 1003.2 1004.2 1002.2 1012.1 1013.1 1009.9 1009.1 1014.8 1015.6 1018.8 1015.7 1009.4 1002.2 DAY 28 20 26 14 29 30 26 1 7 26 20 6 MEAN QFF PRESSURE IN HPA 1019.7 1013.5 1011.6 1008.4 1005.7 996.7 990.5 995.1 1000.7 1008.3 1013.0 1017.0 1006.7 MAX. QFF PRESSURE IN HPA 1034.7 1025.8 1025.0 1015.9 1011.8 1003.9 998.8 999.4 1006.8 1013.7 1022.8 1026.8 1034.7 DAY 31 7 2 3 10 4 3 11 27 30 25 12 MIN. QFF PRESSURE IN HPA 1004.9 1000.3 995.5 1002.8 996.8 990.4 985.7 991.2 993.5 1003.2 1006.1 1006.1 985.7 DAY 28 20 26 21 29 30 26 2 7 2 2 6 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 769.6 766.8 768.1 771.1 772.1 769.6 767.8 770.5 771.9 774.3 772.5 771.4 770.5 MAX. QFE PRESSURE IN HPA 776.8 773.0 773.5 777.4 775.1 775.3 772.3 773.0 774.5 777.5 778.0 774.5 778.0 DAY 12 6 3 8 10 2 3 11 27 15 25 22 MIN. QFE PRESSURE IN HPA 756.3 760.1 761.4 766.5 767.8 764.6 764.4 768.5 768.5 771.4 769.0 763.1 756.3 DAY 28 20 12 14 29 30 26 1 7 26 14 6 MEAN QNH PRESSURE IN HPA 1015.9 1012.5 1014.1 1017.9 1019.1 1016.0 1013.7 1017.0 1018.8 1021.9 1019.5 1018.3 1017.1 MAX. QNH PRESSURE IN HPA 1025.0 1020.2 1020.8 1025.7 1022.8 1023.1 1019.3 1020.2 1022.1 1025.9 1026.5 1022.1 1026.5 DAY 12 6 3 8 10 2 3 11 27 15 25 22 MIN. QNH PRESSURE IN HPA 999.3 1004.1 1005.7 1012.1 1013.7 1009.7 1009.4 1014.6 1014.6 1018.2 1015.2 1007.8 999.3 DAY 28 20 12 14 29 30 26 1 7 26 14 6 MEAN QFF PRESSURE IN HPA 1018.6 1012.4 1011.0 1008.0 1006.0 997.6 991.5 995.3 1001.0 1008.4 1013.2 1016.4 1006.6 MAX. QFF PRESSURE IN HPA 1030.5 1023.7 1024.8 1014.7 1013.2 1008.5 999.5 998.8 1006.7 1014.8 1023.3 1025.4 1030.5 DAY 31 7 2 3 10 2 3 11 26 30 25 13 MIN. QFF PRESSURE IN HPA 998.2 999.5 1000.4 1001.1 998.8 991.1 987.0 992.1 994.5 1003.5 1006.8 1006.0 987.0 DAY 28 20 12 20 29 30 25 2 7 2 2 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 770.1 767.0 768.2 771.1 772.0 769.6 767.8 770.4 772.0 774.6 773.0 772.1 770.7 MAX. QFE PRESSURE IN HPA 776.8 773.5 773.7 777.4 775.1 774.7 772.0 772.6 774.6 777.9 778.8 775.1 778.8 DAY 7 6 2 8 10 3 3 11 26 15 25 22 MIN. QFE PRESSURE IN HPA 756.9 759.6 760.5 766.3 768.7 764.7 764.2 768.4 768.6 771.9 769.3 765.5 756.9 DAY 28 20 12 20 28 30 25 1 7 26 14 6 MEAN QNH PRESSURE IN HPA 1016.6 1012.7 1014.2 1017.8 1019.0 1016.0 1013.7 1016.9 1019.0 1022.2 1020.2 1019.1 1017.3 MAX. QNH PRESSURE IN HPA 1025.0 1020.8 1021.1 1025.7 1022.8 1022.4 1019.0 1019.7 1022.2 1026.4 1027.5 1022.8 1027.5 DAY 7 6 2 8 10 3 3 11 26 15 25 22 MIN. QNH PRESSURE IN HPA 1000.0 1003.4 1004.6 1011.8 1014.8 1009.8 1009.2 1014.5 1014.7 1018.8 1015.6 1010.8 1000.0 DAY 28 20 12 20 28 30 25 1 7 26 14 6 MEAN QFF PRESSURE IN HPA 1021.7 1014.3 1012.6 1009.2 1007.2 998.6 993.1 997.2 1003.7 1010.9 1016.2 1018.5 1008.6 MAX. QFF PRESSURE IN HPA 1034.6 1028.4 1029.9 1016.0 1013.4 1007.4 1000.2 1000.3 1008.9 1017.1 1026.8 1028.1 1034.6 DAY 31 6 2 2 10 3 3 23 27 15 25 13 MIN. QFF PRESSURE IN HPA 1000.4 999.7 998.4 1000.4 1000.4 992.5 988.6 994.4 997.2 1005.3 1010.4 1005.8 988.6 DAY 28 20 12 20 29 30 25 2 7 2 2 6 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 770.7 767.6 768.8 771.8 772.7 770.1 768.3 771.4 772.9 775.2 773.4 772.5 771.3 MAX. QFE PRESSURE IN HPA 777.8 774.2 774.4 778.0 775.9 775.3 772.4 774.0 775.9 778.2 779.5 775.8 779.5 DAY 7 6 2 8 10 3 3 11 22 15 25 22 MIN. QFE PRESSURE IN HPA 758.6 762.7 761.2 766.6 768.8 765.2 764.7 769.2 769.5 772.8 769.1 765.1 758.6 DAY 28 18 12 20 28 30 25 1 7 26 14 27 MEAN QNH PRESSURE IN HPA 1017.3 1013.4 1015.0 1018.8 1019.9 1016.6 1014.4 1018.2 1020.0 1022.9 1020.8 1019.6 1018.1 MAX. QNH PRESSURE IN HPA 1026.2 1021.7 1022.0 1026.5 1023.9 1023.1 1019.5 1021.5 1023.9 1026.7 1028.4 1023.7 1028.4 DAY 7 6 2 8 10 3 3 11 22 15 25 22 MIN. QNH PRESSURE IN HPA 1002.2 1007.3 1005.4 1012.2 1015.0 1010.5 1009.8 1015.5 1015.8 1020.0 1015.3 1010.3 1002.2 DAY 28 18 12 20 28 30 25 1 7 26 14 27 MEAN QFF PRESSURE IN HPA 1021.9 1014.3 1012.5 1009.0 1005.9 996.9 991.0 995.9 1001.8 1009.4 1015.2 1018.6 1007.7 MAX. QFF PRESSURE IN HPA 1034.9 1028.2 1028.6 1013.8 1011.5 1005.8 998.5 999.9 1007.6 1014.2 1025.5 1027.8 1034.9 DAY 31 6 2 2 9 3 3 11 22 15 24 13 MIN. QFF PRESSURE IN HPA 1003.0 1003.4 1000.5 1000.8 999.5 990.2 986.8 992.1 995.4 1005.3 1008.6 1007.5 986.8 DAY 28 20 12 20 28 20 25 1 7 1 1 27 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 770.5 767.3 768.7 771.6 772.7 770.0 768.4 771.5 773.0 775.0 773.3 772.3 771.2 MAX. QFE PRESSURE IN HPA 777.8 773.9 774.6 777.3 775.6 774.6 772.2 774.4 776.5 778.2 779.5 775.3 779.5 DAY 7 6 2 7 21 3 3 11 22 14 25 22 MIN. QFE PRESSURE IN HPA 760.3 761.4 761.2 767.4 768.5 765.0 764.5 769.5 769.4 771.9 768.9 765.1 760.3 DAY 28 18 12 13 28 30 25 1 7 26 14 27 MEAN QNH PRESSURE IN HPA 1017.0 1013.1 1014.8 1018.5 1019.8 1016.5 1014.4 1018.4 1020.2 1022.7 1020.6 1019.4 1018.0 MAX. QNH PRESSURE IN HPA 1026.2 1021.3 1022.2 1025.6 1023.5 1022.2 1019.2 1022.0 1024.6 1026.7 1028.4 1023.1 1028.4 DAY 7 6 2 7 21 3 3 11 22 14 25 22 MIN. QNH PRESSURE IN HPA 1004.3 1005.7 1005.4 1013.2 1014.6 1010.2 1009.6 1015.8 1015.7 1018.8 1015.1 1010.3 1004.3 DAY 28 18 12 13 28 30 25 1 7 26 14 27 MEAN QFF PRESSURE IN HPA 1019.9 1013.0 1011.3 1008.3 1005.6 996.9 990.8 995.5 1001.2 1008.2 1013.4 1017.3 1006.8 MAX. QFF PRESSURE IN HPA 1030.4 1027.8 1027.0 1014.0 1012.3 1005.9 999.1 999.9 1006.8 1012.8 1023.3 1027.5 1030.4 DAY 31 6 2 3 8 3 2 11 26 14 24 12 MIN. QFF PRESSURE IN HPA 1004.3 1004.9 1000.7 1001.5 998.0 989.9 985.9 992.3 994.1 1002.6 1006.7 1007.8 985.9 DAY 28 13 12 27 28 30 25 1 7 1 1 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.7 -1.7 4.4 7.1 13.9 19.3 21.6 22.4 18.4 12.4 6.1 -4.3 9.7 MINIMUN AIR TEMPERATURE (C) -7.1 -7.0 -0.3 2.3 7.5 10.5 13.0 13.3 9.7 4.4 1.0 -9.8 3.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 17 19 6 0 0 0 0 0 0 0 3 24 69 DAYS WITH FREEZING MIN.<= 0 27 26 18 6 0 0 0 0 0 1 11 31 120 TEMPERATURE RECORDS LOWEST(C) -23.0 -18.2 -8.8 -3.0 2.2 5.6 10.2 10.0 5.2 -0.2 -7.2 -25.6 -25.6 DAY 21 4 17 18 6 5 21 14 28 25 29 29 MAXIMUM AIR TEMPERATURE (C) 2.9 4.4 9.5 12.3 19.4 26.5 28.7 30.4 26.2 20.2 11.3 1.9 16.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 6 19 0 0 0 0 25 DAYS WITH MAXIMUM TEMP. <= 0 4 1 0 0 0 0 0 0 0 0 0 8 13 TEMPERATURE RECORDS HIGHEST(C) 7.6 9.8 15.4 19.0 24.6 29.0 32.0 33.6 29.6 24.6 17.8 8.0 33.6 DAY 1 13 29 22 28 26 29 17 9 6 1 4 DIF. BETWEEN (MAX.-MIN.) (C) 10.0 11.4 9.8 10.0 11.9 16.0 15.7 17.1 16.5 15.8 10.3 11.7 13.1 MEAN DAILY TEMP. (MDT) (C) -2.1 -1.3 4.6 7.3 13.5 18.5 20.9 21.9 18.0 12.3 6.2 -4.0 9.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 3.2 11.3 34.9 3.1 0.0 0.0 0.0 52.6 HEATING DEG. DAYS(BASE 18 0C) 624.0 559.7 415.8 319.9 141.4 17.1 0.2 0.0 38.0 175.8 355.1 680.5 3327.5 DEWPOINT (MEAN C) -8.7 -10.1 -6.0 -2.4 -1.2 0.4 2.6 0.8 -1.8 -3.2 -3.5 -10.3 -3.6 MIXING RATIO (G/KG) 2.79 2.50 3.30 4.39 4.71 5.29 6.11 5.41 4.47 3.99 4.02 2.47 4.12 VAPOUR PRESSURE (HPA) 3.43 3.08 4.07 5.39 5.79 6.49 7.49 6.64 5.51 4.94 4.96 3.04 5.07 SATURATION DEF. (HPA) 1.99 2.66 4.71 5.03 10.71 16.96 19.27 21.80 16.89 10.39 4.81 1.85 9.76 RELATIVE HUMIDITY (MEAN %) 66 56 50 55 38 31 31 26 28 37 53 66 45 RELATIVE HUMIDITY (MAX. %) 83 76 71 76 58 54 50 44 46 60 74 83 65 RELATIVE HUMIDITY (MIN. %) 46 37 33 36 24 18 19 15 16 21 35 48 29 RELATIVE HUMIDITY (MEAN% 03UTC) 73 65 59 70 54 53 50 44 45 58 66 73 59 RELATIVE HUMIDITY (MEAN% 09UTC) 57 48 42 49 29 21 21 16 17 25 45 55 35 RELATIVE HUMIDITY (MEAN% 15UTC) 61 49 45 49 31 20 22 19 20 28 49 65 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 440.9 265.0 77.0 362.6 51.5 0.8 0.0 0.0 0.0 28.5 336.2 232.6 1795.1 DAYS WITH PRECIPITATION >=10 9 5 4 9 3 0 0 0 0 1 6 6 43 DAYS WITH PRECIPITATION >= 5 11 10 6 10 4 0 0 0 0 2 7 8 58 DAYS WITH PRECIPITATION >= 1 12 10 6 14 6 0 0 0 0 2 9 12 71 DAYS WITH PRECIPITATION 14 13 10 16 6 1 0 2 0 4 10 14 90 GREATEST DAILY PRECIPITATION 120.0 99.0 22.5 107.0 17.4 0.8 0.0 0.0 0.0 22.0 66.0 62.0 120.0 DAY 7 15 13 4 4 14 ** ** ** 22 19 25 DAY WITH THUNDER STORM 8 4 1 5 3 0 0 0 0 0 5 4 30 DAYS WITH SNOW OR SLEET 13 13 8 4 1 0 0 0 0 0 6 16 61 DAYS WITH DUST 1 4 0 0 0 0 0 0 0 0 0 0 5 WIND DIRECTION (PREVAILING) 225 225 270 270 270 270 270 270 270 270 225 225 270 PREVAILING WIND SPEED(KNOTS) 10.9 11.3 10.8 8.6 8.7 9.1 8.1 8.0 8.8 8.3 12.1 10.1 9.5 PREVAILING WIND PERCENT 10.5 15.1 23.4 11.7 15.3 12.5 11.3 10.5 5.4 9.3 12.5 6.0 11.1 CALMS PERCENT OF WIND 75.4 65.1 59.3 66.7 64.9 77.5 77.8 76.2 85.8 82.3 67.5 83.5 73.5 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 247 234 254 249 264 255 261 248 252 266 241 232 249 VECTOR WIND MAGNITUDE(KNOTS) 2.2 3.1 3.7 2.0 2.3 1.5 1.3 1.3 0.9 1.2 2.7 1.2 1.9 WIND STEADINESES (MEAN %) 84.6 81.6 86.0 66.7 69.7 75.0 72.2 65.0 75.0 80.0 71.1 75.0 73.1 WIND SPEED (MEAN KNOTS) 2.6 3.8 4.3 3.0 3.3 2.0 1.8 2.0 1.2 1.5 3.8 1.6 2.6 FASTEST WIND DIRECTION 210 240 270 210 310 150 280 250 280 260 250 220 210 FASTEST WIND SPEED (KNOTS) 39 39 29 33 19 17 17 17 16 19 39 19 39 DAY 13 6 11 5 14 7 11 13 14 29 18 13 DAYS WITH SKY CLEAR (0-2)/8 15 18 12 9 20 26 23 27 26 26 14 17 233 DAYS WITH P.CLOUDY (3-6)/8 9 5 14 10 9 4 8 4 4 4 9 7 87 DAYS WITH CLOUDY (7-8)/8 7 6 5 11 2 0 0 0 0 1 7 7 46 DAYS WITH VISIBILITY =< 2 KM 9 8 4 1 0 0 0 0 0 0 5 7 34 DURATION OF SUNSHINE HOURS 119.8 179.0 207.7 189.2 312.5 342.5 331.9 331.7 291.8 261.3 175.8 146.5 2889.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 768.3 770.6 772.3 769.9 770.4 770.5 770.5 770.5 773.9 776.1 772.7 770.1 771.3 MAX. QFE PRESSURE IN HPA 774.3 777.7 778.7 775.2 774.5 775.3 774.8 774.3 778.4 779.9 777.2 777.6 779.9 DAY-HOUR 11-21 10- 6 9- 6 28- 6 21-18 6- 6 18- 6 18- 6 25- 6 15- 6 1- 6 4- 6 MIN. QFE PRESSURE IN HPA 761.7 762.6 763.5 759.6 762.4 765.2 765.8 766.6 769.0 772.4 763.5 763.6 759.6 DAY-HOUR 27- 0 2- 3 15- 3 17- 3 13-12 15-15 11- 0 2-15 12-12 20-12 27-12 15-12 MEAN QNH PRESSURE IN HPA 1014.4 1017.2 1019.3 1016.3 1016.9 1017.1 1017.0 1017.1 1021.3 1024.1 1019.9 1016.6 1018.1 MAX. QNH PRESSURE IN HPA 1021.9 1026.1 1027.4 1023.0 1022.1 1023.1 1022.5 1021.9 1027.0 1028.9 1025.5 1026.0 1028.9 DAY-HOUR 11-21 10- 6 9- 6 28- 6 21-18 6- 6 18- 6 18- 6 25- 6 15- 6 1- 6 4- 6 MIN. QNH PRESSURE IN HPA 1006.1 1007.2 1008.3 1003.4 1006.9 1010.5 1011.2 1012.2 1015.2 1019.5 1008.3 1008.4 1003.4 DAY-HOUR 27- 0 2- 3 15- 3 17- 3 13-12 15-15 11- 0 2-15 12-12 20-12 27-12 15-12 MEAN QFF PRESSURE IN HPA 1016.9 1018.8 1014.8 1008.9 1003.2 998.5 996.4 995.8 1003.8 1012.0 1013.5 1020.9 1008.6 MAX. QFF PRESSURE IN HPA 1034.8 1037.0 1025.4 1015.8 1009.8 1008.2 1003.6 1003.8 1014.4 1019.5 1025.7 1045.6 1045.6 DAY-HOUR 30- 6 9- 3 23- 3 12- 6 18- 6 1- 3 18- 3 29- 3 27- 3 27- 3 29- 3 30- 3 MIN. QFF PRESSURE IN HPA 1004.2 1002.8 1000.5 995.5 993.9 990.9 988.9 989.8 995.0 1004.6 1000.9 1006.3 988.9 DAY-HOUR 26-21 15-12 31-15 17- 3 12- 0 18- 9 11- 0 3-12 12-12 3- 9 23- 9 15- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 768.3 770.2 772.0 769.4 770.0 770.5 770.4 770.5 773.9 776.0 772.6 769.8 771.1 MAX. QFE PRESSURE IN HPA 774.0 776.7 777.3 774.1 773.5 774.1 773.7 773.0 777.6 778.6 775.8 777.2 778.6 DAY 12 10 9 28 22 1 18 18 27 15 1 4 MIN. QFE PRESSURE IN HPA 761.7 763.5 763.8 762.0 762.8 766.3 765.8 767.7 769.8 773.0 765.2 764.3 761.7 DAY 27 2 15 17 14 18 11 3 17 21 23 16 MEAN QNH PRESSURE IN HPA 1014.3 1016.8 1019.0 1015.7 1016.4 1017.0 1016.9 1017.1 1021.3 1024.0 1019.7 1016.2 1017.9 MAX. QNH PRESSURE IN HPA 1021.5 1024.9 1025.6 1021.6 1020.8 1021.6 1021.1 1020.2 1026.0 1027.2 1023.7 1025.5 1027.2 DAY 12 10 9 28 22 1 18 18 27 15 1 4 MIN. QNH PRESSURE IN HPA 1006.1 1008.3 1008.7 1006.4 1007.4 1011.8 1011.2 1013.6 1016.2 1020.2 1010.5 1009.3 1006.1 DAY 27 2 15 17 14 18 11 3 17 21 23 16 MEAN QFF PRESSURE IN HPA 1016.1 1017.8 1014.4 1008.1 1002.7 998.8 996.4 995.8 1003.4 1011.6 1013.1 1019.8 1008.1 MAX. QFF PRESSURE IN HPA 1029.0 1033.7 1023.5 1014.2 1007.6 1007.3 1000.8 1001.3 1010.5 1017.0 1023.0 1042.4 1042.4 DAY 30 9 24 12 19 1 18 29 27 24 29 30 MIN. QFF PRESSURE IN HPA 1005.2 1005.1 1005.4 998.2 993.9 991.5 988.9 990.4 997.0 1006.6 1001.4 1006.8 988.9 DAY 27 15 31 1 12 18 11 3 12 3 23 16 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 768.2 770.2 772.3 769.7 770.5 770.9 770.9 771.0 774.4 776.5 772.7 769.9 771.4 MAX. QFE PRESSURE IN HPA 773.8 777.0 777.9 774.7 774.0 775.1 774.3 773.8 778.0 779.1 776.4 777.2 779.1 DAY 12 10 9 28 22 6 18 18 27 15 1 4 MIN. QFE PRESSURE IN HPA 761.9 762.6 763.5 759.6 763.2 766.7 766.0 767.9 770.4 773.4 765.5 764.4 759.6 DAY 27 2 15 17 14 18 11 3 17 21 23 16 MEAN QNH PRESSURE IN HPA 1014.3 1016.7 1019.4 1016.1 1017.0 1017.6 1017.6 1017.7 1022.0 1024.6 1019.8 1016.4 1018.3 MAX. QNH PRESSURE IN HPA 1021.2 1025.2 1026.4 1022.4 1021.5 1022.8 1021.9 1021.2 1026.5 1027.9 1024.5 1025.5 1027.9 DAY 12 10 9 28 22 6 18 18 27 15 1 4 MIN. QNH PRESSURE IN HPA 1006.3 1007.2 1008.3 1003.4 1007.9 1012.3 1011.5 1013.8 1017.0 1020.7 1010.8 1009.4 1003.4 DAY 27 2 15 17 14 18 11 3 17 21 23 16 MEAN QFF PRESSURE IN HPA 1017.6 1019.5 1016.0 1009.7 1004.4 1000.5 998.3 998.4 1006.7 1014.6 1014.6 1022.0 1010.2 MAX. QFF PRESSURE IN HPA 1033.0 1037.0 1025.4 1015.8 1009.5 1008.2 1003.6 1003.8 1014.4 1019.5 1025.7 1045.6 1045.6 DAY 21 9 23 8 2 1 18 29 27 27 29 30 MIN. QFF PRESSURE IN HPA 1007.0 1004.9 1004.8 995.5 994.1 994.9 991.1 993.0 1000.1 1009.6 1002.3 1007.6 991.1 DAY 27 15 31 17 12 18 11 3 12 22 23 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 769.0 771.0 773.1 770.3 770.8 771.1 771.2 771.3 775.0 777.3 773.7 770.9 772.1 MAX. QFE PRESSURE IN HPA 774.0 777.7 778.7 775.2 774.4 775.3 774.8 774.3 778.4 779.9 777.2 777.6 779.9 DAY 12 10 9 28 22 6 18 18 25 15 1 4 MIN. QFE PRESSURE IN HPA 762.9 763.9 764.5 761.3 763.5 767.0 766.8 767.8 771.1 774.1 765.5 765.0 761.3 DAY 27 15 15 17 13 18 11 4 17 3 23 16 MEAN QNH PRESSURE IN HPA 1015.2 1017.7 1020.4 1016.9 1017.5 1017.9 1018.0 1018.1 1022.8 1025.5 1021.0 1017.5 1019.0 MAX. QNH PRESSURE IN HPA 1021.5 1026.1 1027.4 1023.0 1022.0 1023.1 1022.5 1021.9 1027.0 1028.9 1025.5 1026.0 1028.9 DAY 12 10 9 28 22 6 18 18 25 15 1 4 MIN. QNH PRESSURE IN HPA 1007.6 1008.8 1009.6 1005.6 1008.3 1012.7 1012.5 1013.7 1017.8 1021.6 1010.8 1010.2 1005.6 DAY 27 15 15 17 13 18 11 4 17 3 23 16 MEAN QFF PRESSURE IN HPA 1018.5 1019.8 1015.5 1009.2 1003.3 998.3 996.6 996.0 1004.6 1012.9 1014.5 1022.2 1009.3 MAX. QFF PRESSURE IN HPA 1034.8 1036.3 1024.5 1015.8 1009.8 1006.4 1001.5 1001.3 1012.7 1019.3 1025.1 1043.3 1043.3 DAY 30 9 23 12 18 1 18 29 27 25 29 30 MIN. QFF PRESSURE IN HPA 1006.4 1005.5 1006.6 1000.0 994.3 992.4 991.8 990.8 997.3 1006.8 1004.5 1007.8 990.8 DAY 27 15 31 17 13 18 11 4 12 3 23 16 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 768.4 770.9 772.7 770.2 770.5 770.5 770.6 770.5 773.9 776.0 772.7 770.3 771.4 MAX. QFE PRESSURE IN HPA 772.8 777.2 777.8 774.3 773.8 774.9 774.2 773.3 777.2 778.7 776.0 776.9 778.7 DAY 12 10 8 28 21 6 18 18 27 15 1 3 MIN. QFE PRESSURE IN HPA 763.3 763.2 764.8 761.5 763.1 766.2 766.5 767.5 770.2 772.8 764.5 763.9 761.5 DAY 27 15 15 17 13 18 11 3 12 3 23 15 MEAN QNH PRESSURE IN HPA 1014.5 1017.5 1019.8 1016.7 1017.1 1017.1 1017.2 1017.1 1021.4 1024.0 1019.9 1016.8 1018.3 MAX. QNH PRESSURE IN HPA 1020.0 1025.5 1026.2 1021.9 1021.2 1022.6 1021.7 1020.6 1025.5 1027.4 1024.0 1025.1 1027.4 DAY 12 10 8 28 21 6 18 18 27 15 1 3 MIN. QNH PRESSURE IN HPA 1008.1 1007.9 1009.9 1005.8 1007.8 1011.7 1012.1 1013.3 1016.7 1020.0 1009.6 1008.8 1005.8 DAY 27 15 15 17 13 18 11 3 12 3 23 15 MEAN QFF PRESSURE IN HPA 1016.3 1018.1 1014.9 1008.9 1002.7 997.6 995.8 994.4 1002.3 1010.5 1012.6 1020.1 1007.9 MAX. QFF PRESSURE IN HPA 1031.0 1032.9 1024.1 1014.7 1008.9 1005.6 1000.4 999.6 1009.3 1015.3 1021.9 1038.8 1038.8 DAY 30 10 23 7 18 5 18 29 27 27 29 29 MIN. QFF PRESSURE IN HPA 1005.8 1003.8 1005.2 999.9 994.3 990.9 991.7 990.1 995.9 1004.6 1000.9 1006.3 990.1 DAY 13 15 31 17 13 18 28 3 12 3 23 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 767.7 770.0 771.7 769.5 770.0 769.9 769.9 769.9 772.9 775.1 772.1 769.5 770.7 MAX. QFE PRESSURE IN HPA 772.6 776.2 776.9 773.4 773.8 773.6 772.9 772.3 776.0 777.4 775.1 776.4 777.4 DAY 11 10 8 27 21 6 18 18 27 15 1 3 MIN. QFE PRESSURE IN HPA 762.5 762.7 764.3 761.1 762.4 765.5 766.2 766.8 769.0 772.4 763.5 763.6 761.1 DAY 7 15 15 17 13 15 11 3 12 20 27 15 MEAN QNH PRESSURE IN HPA 1013.6 1016.5 1018.6 1015.9 1016.5 1016.4 1016.4 1016.3 1020.1 1022.8 1019.1 1015.8 1017.3 MAX. QNH PRESSURE IN HPA 1019.7 1024.2 1025.1 1020.7 1021.2 1021.0 1020.1 1019.3 1024.0 1025.7 1022.8 1024.5 1025.7 DAY 11 10 8 27 21 6 18 18 27 15 1 3 MIN. QNH PRESSURE IN HPA 1007.1 1007.3 1009.3 1005.3 1006.9 1010.8 1011.7 1012.5 1015.2 1019.5 1008.3 1008.4 1005.3 DAY 7 15 15 17 13 15 11 3 12 20 27 15 MEAN QFF PRESSURE IN HPA 1015.2 1017.4 1013.9 1008.2 1002.7 998.0 995.8 995.0 1002.3 1010.4 1012.6 1019.3 1007.6 MAX. QFF PRESSURE IN HPA 1029.5 1030.6 1022.5 1013.6 1007.9 1005.1 1000.3 1000.6 1008.6 1014.5 1019.9 1037.3 1037.3 DAY 30 10 23 3 18 1 18 29 26 17 28 29 MIN. QFF PRESSURE IN HPA 1004.4 1002.8 1002.0 1000.2 995.0 992.9 990.9 989.8 995.0 1005.5 1002.4 1006.7 989.8 DAY 3 15 31 17 13 15 11 3 12 3 27 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 768.1 770.4 771.8 769.7 770.1 769.9 769.7 769.8 773.0 775.4 772.5 769.9 770.9 MAX. QFE PRESSURE IN HPA 773.1 776.2 777.6 773.6 773.9 773.5 772.3 772.4 776.1 777.6 775.5 776.9 777.6 DAY 11 10 8 27 21 6 17 29 26 17 1 3 MIN. QFE PRESSURE IN HPA 762.5 764.3 764.8 762.3 763.0 765.2 766.1 766.6 769.3 772.9 763.9 764.2 762.3 DAY 7 6 31 17 13 15 10 2 16 20 27 15 MEAN QNH PRESSURE IN HPA 1014.1 1016.9 1018.7 1016.1 1016.6 1016.4 1016.1 1016.2 1020.2 1023.3 1019.5 1016.4 1017.5 MAX. QNH PRESSURE IN HPA 1020.3 1024.2 1026.0 1021.0 1021.3 1020.8 1019.3 1019.5 1024.1 1026.0 1023.4 1025.1 1026.0 DAY 11 10 8 27 21 6 17 29 26 17 1 3 MIN. QNH PRESSURE IN HPA 1007.1 1009.3 1009.9 1006.8 1007.7 1010.5 1011.6 1012.2 1015.6 1020.1 1008.8 1009.2 1006.8 DAY 7 6 31 17 13 15 10 2 16 20 27 15 MEAN QFF PRESSURE IN HPA 1017.4 1019.6 1015.1 1009.6 1003.9 999.4 997.0 996.9 1004.9 1013.4 1014.4 1022.1 1009.5 MAX. QFF PRESSURE IN HPA 1032.8 1034.6 1024.3 1014.9 1008.3 1006.1 1001.3 1002.5 1012.0 1018.2 1023.6 1042.4 1042.4 DAY 30 10 23 8 18 1 18 29 26 25 28 29 MIN. QFF PRESSURE IN HPA 1005.8 1007.8 1000.5 1002.9 995.5 993.9 992.1 992.1 998.4 1009.5 1001.7 1007.6 992.1 DAY 7 15 31 17 12 15 12 2 12 7 27 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 768.6 771.1 772.4 770.3 770.7 770.6 770.4 770.6 774.0 776.2 772.9 770.4 771.5 MAX. QFE PRESSURE IN HPA 774.1 776.8 778.4 774.4 774.5 774.1 772.9 773.2 777.2 778.7 775.7 777.5 778.7 DAY 11 9 8 27 21 1 17 18 26 14 1 3 MIN. QFE PRESSURE IN HPA 763.2 765.5 764.7 764.1 763.8 766.3 766.3 767.4 770.0 773.2 765.4 764.7 763.2 DAY 26 6 31 17 13 15 11 3 16 20 23 16 MEAN QNH PRESSURE IN HPA 1014.7 1017.8 1019.4 1016.8 1017.4 1017.2 1017.0 1017.3 1021.5 1024.3 1020.2 1016.9 1018.4 MAX. QNH PRESSURE IN HPA 1021.6 1025.0 1027.0 1022.0 1022.1 1021.6 1020.1 1020.5 1025.5 1027.4 1023.6 1025.9 1027.4 DAY 11 9 8 27 21 1 17 18 26 14 1 3 MIN. QNH PRESSURE IN HPA 1007.9 1010.8 1009.8 1009.1 1008.7 1011.8 1011.8 1013.2 1016.5 1020.5 1010.7 1009.8 1007.9 DAY 26 6 31 17 13 15 11 3 16 20 23 16 MEAN QFF PRESSURE IN HPA 1018.0 1019.8 1014.5 1009.2 1003.2 997.8 995.7 995.3 1003.4 1011.8 1013.8 1021.7 1008.7 MAX. QFF PRESSURE IN HPA 1033.1 1036.4 1023.1 1015.7 1008.2 1004.8 1000.5 999.7 1010.8 1017.6 1023.7 1043.3 1043.3 DAY 30 8 23 11 18 1 18 29 26 24 28 29 MIN. QFF PRESSURE IN HPA 1005.3 1010.5 1002.7 1001.1 995.3 993.7 990.5 990.6 996.6 1006.8 1006.4 1008.7 990.5 DAY 26 6 31 16 12 17 10 2 11 3 27 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 768.5 770.9 772.2 770.1 770.5 770.6 770.6 770.7 774.2 776.3 772.7 770.1 771.5 MAX. QFE PRESSURE IN HPA 774.3 776.8 778.4 774.4 774.1 774.1 773.7 773.5 777.6 778.8 775.8 777.3 778.8 DAY 11 9 8 27 21 6 17 17 26 14 1 3 MIN. QFE PRESSURE IN HPA 761.9 765.9 764.0 764.1 763.5 766.8 766.3 767.6 770.5 773.2 765.8 764.6 761.9 DAY 26 6 31 16 13 17 10 3 12 20 23 16 MEAN QNH PRESSURE IN HPA 1014.6 1017.6 1019.3 1016.5 1017.1 1017.3 1017.2 1017.4 1021.7 1024.4 1019.9 1016.6 1018.3 MAX. QNH PRESSURE IN HPA 1021.9 1025.0 1027.0 1022.0 1021.6 1021.6 1021.1 1020.8 1026.0 1027.5 1023.7 1025.6 1027.5 DAY 11 9 8 27 21 6 17 17 26 14 1 3 MIN. QNH PRESSURE IN HPA 1006.3 1011.3 1008.9 1009.1 1008.3 1012.5 1011.8 1013.5 1017.1 1020.5 1011.2 1009.7 1006.3 DAY 26 6 31 16 13 17 10 3 12 20 23 16 MEAN QFF PRESSURE IN HPA 1016.4 1018.2 1014.1 1008.7 1002.7 997.7 995.6 994.8 1002.7 1011.0 1012.8 1020.1 1007.9 MAX. QFF PRESSURE IN HPA 1030.9 1035.5 1022.9 1015.1 1007.3 1005.6 1001.1 999.2 1009.7 1016.0 1023.3 1042.4 1042.4 DAY 29 8 22 11 2 4 18 29 26 24 28 29 MIN. QFF PRESSURE IN HPA 1004.2 1009.6 1000.9 999.2 994.9 992.7 991.0 990.7 996.2 1005.8 1004.6 1007.0 990.7 DAY 26 14 31 16 12 17 10 3 11 2 22 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -7.3 -4.5 2.8 10.1 13.4 19.4 23.5 22.5 18.4 12.8 5.1 1.1 9.8 MINIMUN AIR TEMPERATURE (C) -13.4 -9.2 -2.4 4.1 6.2 10.0 14.7 14.0 9.1 5.2 -0.4 -4.4 2.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 28 22 11 0 0 0 0 0 0 0 4 12 77 DAYS WITH FREEZING MIN.<= 0 31 26 23 4 0 0 0 0 0 2 19 26 131 TEMPERATURE RECORDS LOWEST(C) -23.0 -20.8 -10.0 -2.0 0.6 5.8 10.6 9.2 3.8 -2.2 -4.4 -19.6 -23.0 DAY 15 15 6 8 7 1 1 31 28 25 12 28 MAXIMUM AIR TEMPERATURE (C) 0.3 1.3 8.0 16.0 19.2 26.6 30.8 29.9 26.5 20.1 11.6 8.3 16.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 20 15 0 0 0 0 38 DAYS WITH MAXIMUM TEMP. <= 0 18 10 0 0 0 0 0 0 0 0 0 5 33 TEMPERATURE RECORDS HIGHEST(C) 10.0 8.2 14.0 23.4 22.8 32.0 33.2 32.6 29.8 24.2 19.2 17.6 33.2 DAY 1 21 30 24 28 24 15 6 10 2 1 4 DIF. BETWEEN (MAX.-MIN.) (C) 13.7 10.5 10.4 11.9 13.0 16.6 16.1 15.9 17.4 14.9 12.0 12.7 13.8 MEAN DAILY TEMP. (MDT) (C) -6.5 -3.9 2.8 10.0 12.7 18.3 22.8 22.0 17.8 12.7 5.6 2.0 9.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 2.1 59.6 36.9 0.0 0.0 0.0 0.0 98.6 HEATING DEG. DAYS(BASE 18 0C) 759.7 613.9 470.3 238.7 163.1 19.9 0.0 0.2 24.3 165.8 371.4 497.0 3324.3 DEWPOINT (MEAN C) -12.2 -9.6 -5.6 -1.8 -0.2 2.0 4.8 3.0 -2.8 -3.2 -3.5 -6.8 -3.0 MIXING RATIO (G/KG) 2.17 2.59 3.51 4.57 5.04 5.84 7.16 6.32 4.15 3.97 3.96 3.21 4.38 VAPOUR PRESSURE (HPA) 2.67 3.18 4.32 5.63 6.20 7.17 8.76 7.75 5.12 4.92 4.89 3.97 5.38 SATURATION DEF. (HPA) 1.36 1.52 3.42 7.32 9.85 16.56 21.40 20.72 17.29 10.63 4.30 3.44 9.82 RELATIVE HUMIDITY (MEAN %) 70 69 57 47 43 34 32 30 26 35 58 60 47 RELATIVE HUMIDITY (MAX. %) 84 84 73 70 67 55 51 48 44 54 80 80 66 RELATIVE HUMIDITY (MIN. %) 52 53 41 30 25 21 20 18 14 21 36 40 31 RELATIVE HUMIDITY (MEAN% 03UTC) 75 75 66 62 65 54 51 47 43 51 74 75 62 RELATIVE HUMIDITY (MEAN% 09UTC) 63 59 49 36 30 24 22 20 16 24 41 46 36 RELATIVE HUMIDITY (MEAN% 15UTC) 68 68 55 42 32 25 25 22 18 30 50 52 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 305.7 159.4 506.7 163.6 50.1 0.0 0.0 0.0 0.0 5.1 237.5 318.0 1746.1 DAYS WITH PRECIPITATION >=10 7 6 10 6 2 0 0 0 0 0 6 5 42 DAYS WITH PRECIPITATION >= 5 8 8 11 6 3 0 0 0 0 0 6 6 48 DAYS WITH PRECIPITATION >= 1 10 14 13 8 4 0 0 0 0 2 9 7 67 DAYS WITH PRECIPITATION 11 17 13 10 7 0 1 0 0 2 10 7 78 GREATEST DAILY PRECIPITATION 65.0 23.0 177.0 52.0 28.7 0.0 0.0 0.0 0.0 3.3 120.0 123.0 177.0 DAY 10 2 12 16 3 ** ** ** ** 22 8 24 DAY WITH THUNDER STORM 2 2 6 4 4 0 0 0 0 0 5 5 28 DAYS WITH SNOW OR SLEET 11 17 9 1 0 0 0 0 0 0 4 7 49 DAYS WITH DUST 0 1 0 0 3 0 0 0 0 0 0 0 4 WIND DIRECTION (PREVAILING) 270 270 270 270 315 315 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 9.8 10.6 9.0 9.8 8.9 8.8 8.4 8.3 8.8 8.5 10.2 9.1 9.0 PREVAILING WIND PERCENT 8.5 8.0 10.1 9.2 6.5 10.4 10.9 9.3 10.4 11.3 4.2 3.6 7.5 CALMS PERCENT OF WIND 79.8 80.8 69.8 72.5 80.6 79.2 82.3 79.0 79.2 76.2 90.0 90.7 80.0 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 257 259 263 298 323 318 300 288 305 316 293 310 292 VECTOR WIND MAGNITUDE(KNOTS) 1.6 1.6 2.1 2.0 1.2 1.6 1.1 1.1 1.5 1.4 0.7 0.5 1.2 WIND STEADINESES (MEAN %) 72.7 84.2 70.0 76.9 70.6 88.9 73.3 61.1 83.3 70.0 70.0 62.5 66.7 WIND SPEED (MEAN KNOTS) 2.2 1.9 3.0 2.6 1.7 1.8 1.5 1.8 1.8 2.0 1.0 0.8 1.8 FASTEST WIND DIRECTION 210 250 30 270 270 10 340 280 310 20 310 260 260 FASTEST WIND SPEED (KNOTS) 19 19 29 16 16 14 14 16 12 27 29 33 33 DAY 6 2 9 4 3 3 14 30 4 28 6 24 DAYS WITH SKY CLEAR (0-2)/8 16 9 14 16 22 29 23 29 30 28 18 19 253 DAYS WITH P.CLOUDY (3-6)/8 8 9 9 7 8 1 8 2 0 3 8 8 71 DAYS WITH CLOUDY (7-8)/8 7 10 8 7 1 0 0 0 0 0 4 4 41 DAYS WITH VISIBILITY =< 2 KM 11 6 5 1 1 0 0 0 0 0 2 6 32 DURATION OF SUNSHINE HOURS 164.7 152.3 204.4 234.3 313.7 362.2 316.8 333.2 310.8 272.6 199.1 169.1 3033.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 768.9 767.3 769.2 772.5 771.6 770.2 769.9 770.5 772.4 775.5 773.0 773.1 771.2 MAX. QFE PRESSURE IN HPA 775.8 773.5 774.2 777.9 775.3 775.3 773.3 773.9 775.5 781.7 778.4 779.3 781.7 DAY-HOUR 1- 6 17-18 10- 6 21- 6 19- 9 16- 6 19- 6 17- 6 3- 6 12- 6 23- 6 8- 6 MIN. QFE PRESSURE IN HPA 755.5 760.8 761.7 767.7 763.3 765.4 764.1 766.6 769.2 770.4 766.6 763.2 755.5 DAY-HOUR 23- 0 9- 3 24- 0 30- 0 6- 3 28-12 5-12 7-15 15-15 4-12 8-12 24- 3 MEAN QNH PRESSURE IN HPA 1015.1 1013.1 1015.5 1019.6 1018.4 1016.8 1016.4 1017.1 1019.4 1023.4 1020.3 1020.4 1017.9 MAX. QNH PRESSURE IN HPA 1023.7 1020.8 1021.7 1026.4 1023.1 1023.1 1020.6 1021.3 1023.4 1031.1 1027.0 1028.1 1031.1 DAY-HOUR 1- 6 17-18 10- 6 21- 6 19- 9 16- 6 19- 6 17- 6 3- 6 12- 6 23- 6 8- 6 MIN. QNH PRESSURE IN HPA 998.3 1004.9 1006.1 1013.6 1008.1 1010.7 1009.1 1012.2 1015.5 1017.0 1012.2 1007.9 998.3 DAY-HOUR 23- 0 9- 3 24- 0 30- 0 6- 3 28-12 5-12 7-15 15-15 4-12 8-12 24- 3 MEAN QFF PRESSURE IN HPA 1022.6 1017.3 1012.4 1009.4 1005.2 998.0 993.9 995.5 1001.8 1011.0 1015.0 1019.1 1008.4 MAX. QFF PRESSURE IN HPA 1040.7 1035.9 1020.7 1016.6 1011.1 1008.4 1001.0 1002.5 1009.6 1019.4 1022.3 1039.6 1040.7 DAY-HOUR 13- 6 15- 6 3- 3 8- 3 10- 3 4- 3 29- 3 25- 3 28- 3 24- 3 26- 3 29- 6 MIN. QFF PRESSURE IN HPA 997.7 1007.4 999.0 1000.0 999.4 989.6 986.4 986.8 994.7 1001.7 1005.9 1004.6 986.4 DAY-HOUR 23- 0 5- 0 24- 0 26-21 5-12 27- 9 5- 9 8- 9 5- 9 4- 9 8-12 24- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 768.8 766.9 768.8 772.1 771.4 770.2 769.9 770.5 772.2 775.4 772.9 773.0 771.0 MAX. QFE PRESSURE IN HPA 775.5 772.8 773.0 776.5 774.3 774.0 772.4 773.1 775.0 780.2 776.3 777.8 780.2 DAY 1 18 29 21 12 16 11 29 3 12 23 8 MIN. QFE PRESSURE IN HPA 755.5 761.0 761.7 767.7 764.0 765.9 765.0 767.1 769.9 771.4 768.5 764.3 755.5 DAY 23 9 24 30 6 28 6 8 5 4 9 24 MEAN QNH PRESSURE IN HPA 1014.9 1012.6 1014.9 1019.1 1018.2 1016.7 1016.3 1017.1 1019.3 1023.2 1020.1 1020.3 1017.7 MAX. QNH PRESSURE IN HPA 1023.4 1020.0 1020.2 1024.6 1021.9 1021.5 1019.5 1020.3 1022.7 1029.2 1024.4 1026.2 1029.2 DAY 1 18 29 21 12 16 11 29 3 12 23 8 MIN. QNH PRESSURE IN HPA 998.3 1005.2 1006.1 1013.6 1008.9 1011.3 1010.2 1012.8 1016.3 1018.2 1014.6 1009.3 998.3 DAY 23 9 24 30 6 28 6 8 5 4 9 24 MEAN QFF PRESSURE IN HPA 1021.3 1015.9 1011.5 1008.7 1005.0 998.6 994.0 995.5 1001.3 1010.5 1014.3 1017.9 1007.9 MAX. QFF PRESSURE IN HPA 1034.7 1031.0 1017.1 1013.6 1008.9 1006.5 998.7 999.8 1005.6 1015.9 1019.8 1035.1 1035.1 DAY 14 15 3 19 12 4 29 18 29 24 26 29 MIN. QFF PRESSURE IN HPA 997.7 1007.4 999.0 1001.3 1000.6 992.6 988.0 989.4 996.8 1003.7 1008.7 1008.0 988.0 DAY 23 5 24 30 6 20 6 8 12 21 6 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 768.7 767.0 769.1 772.5 771.7 770.7 770.3 770.9 772.7 775.8 773.2 773.1 771.3 MAX. QFE PRESSURE IN HPA 775.5 772.9 773.0 777.1 774.7 774.8 773.1 773.6 775.2 781.1 777.0 778.2 781.1 DAY 1 18 29 21 12 16 28 17 3 12 1 8 MIN. QFE PRESSURE IN HPA 758.0 760.8 762.0 768.0 763.3 766.4 765.3 767.4 770.2 771.5 769.3 763.2 758.0 DAY 23 9 24 30 6 28 6 8 5 4 9 24 MEAN QNH PRESSURE IN HPA 1014.9 1012.7 1015.3 1019.6 1018.6 1017.3 1016.9 1017.6 1019.9 1023.7 1020.5 1020.3 1018.1 MAX. QNH PRESSURE IN HPA 1023.4 1020.1 1020.2 1025.4 1022.4 1022.5 1020.3 1021.0 1023.0 1030.4 1025.2 1026.7 1030.4 DAY 1 18 29 21 12 16 28 17 3 12 1 8 MIN. QNH PRESSURE IN HPA 1001.4 1004.9 1006.4 1014.0 1008.1 1012.0 1010.6 1013.2 1016.7 1018.3 1015.6 1007.9 1001.4 DAY 23 9 24 30 6 28 6 8 5 4 9 24 MEAN QFF PRESSURE IN HPA 1023.5 1018.2 1013.4 1010.8 1006.7 1000.3 996.2 998.0 1004.6 1013.4 1016.6 1020.3 1010.2 MAX. QFF PRESSURE IN HPA 1038.9 1034.5 1020.7 1016.6 1011.1 1008.4 1001.0 1002.5 1009.6 1019.4 1022.3 1037.8 1038.9 DAY 14 15 3 8 10 4 29 25 28 24 26 29 MIN. QFF PRESSURE IN HPA 1002.6 1008.1 999.8 1001.8 1000.7 994.1 990.3 992.0 999.8 1004.9 1009.9 1004.6 990.3 DAY 23 2 24 27 5 20 6 8 12 20 6 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 769.8 767.9 769.9 773.1 772.0 770.8 770.6 771.2 773.2 776.5 774.0 774.2 771.9 MAX. QFE PRESSURE IN HPA 775.8 773.3 774.2 777.9 775.0 775.3 773.3 773.9 775.5 781.7 778.4 779.3 781.7 DAY 1 15 10 21 10 16 19 17 3 12 23 8 MIN. QFE PRESSURE IN HPA 761.0 761.8 762.5 768.2 763.8 766.6 765.5 767.5 770.3 771.6 769.3 766.8 761.0 DAY 23 9 24 30 6 28 6 8 5 4 8 24 MEAN QNH PRESSURE IN HPA 1016.2 1013.8 1016.3 1020.3 1018.9 1017.4 1017.2 1018.0 1020.4 1024.6 1021.5 1021.7 1018.9 MAX. QNH PRESSURE IN HPA 1023.7 1020.6 1021.7 1026.4 1022.7 1023.1 1020.6 1021.3 1023.4 1031.1 1027.0 1028.1 1031.1 DAY 1 15 10 21 10 16 19 17 3 12 23 8 MIN. QNH PRESSURE IN HPA 1005.2 1006.2 1007.1 1014.2 1008.7 1012.2 1010.8 1013.3 1016.8 1018.5 1015.6 1012.5 1005.2 DAY 23 9 24 30 6 28 6 8 5 4 8 24 MEAN QFF PRESSURE IN HPA 1025.0 1018.8 1013.1 1009.6 1005.0 997.7 994.1 995.6 1001.9 1011.8 1016.5 1021.0 1009.2 MAX. QFF PRESSURE IN HPA 1040.7 1035.9 1020.2 1015.6 1008.7 1005.7 999.2 1000.1 1006.8 1017.8 1022.0 1039.6 1040.7 DAY 13 15 6 6 10 4 29 18 28 24 26 29 MIN. QFF PRESSURE IN HPA 1004.5 1007.6 1002.6 1001.8 1000.9 990.2 987.8 988.7 996.1 1003.4 1010.8 1011.2 987.8 DAY 3 7 24 30 5 27 6 8 6 4 6 24 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 769.2 767.7 769.8 772.8 771.7 770.3 770.0 770.5 772.3 775.5 773.0 773.2 771.3 MAX. QFE PRESSURE IN HPA 774.5 773.1 773.4 777.0 775.3 774.7 772.8 773.3 774.7 780.3 777.4 777.5 780.3 DAY 1 18 30 21 19 6 19 17 26 12 23 8 MIN. QFE PRESSURE IN HPA 762.0 761.6 762.1 767.9 764.0 765.8 765.0 767.0 769.7 771.0 768.1 766.4 761.6 DAY 23 9 24 30 6 28 5 8 5 4 8 24 MEAN QNH PRESSURE IN HPA 1015.4 1013.5 1016.2 1020.0 1018.6 1016.8 1016.4 1017.1 1019.3 1023.4 1020.3 1020.5 1018.1 MAX. QNH PRESSURE IN HPA 1022.1 1020.3 1020.7 1025.2 1023.1 1022.4 1020.0 1020.6 1022.4 1029.4 1025.7 1025.9 1029.4 DAY 1 18 30 21 19 6 19 17 26 12 23 8 MIN. QNH PRESSURE IN HPA 1006.4 1005.9 1006.6 1013.8 1008.9 1011.2 1010.2 1012.7 1016.1 1017.7 1014.1 1012.0 1005.9 DAY 23 9 24 30 6 28 5 8 5 4 8 24 MEAN QFF PRESSURE IN HPA 1022.0 1016.9 1012.6 1009.1 1004.5 996.8 992.7 994.2 1000.1 1009.4 1013.6 1017.7 1007.5 MAX. QFF PRESSURE IN HPA 1036.3 1031.0 1019.5 1014.7 1008.3 1004.6 997.5 998.9 1005.1 1014.8 1017.4 1037.6 1037.6 DAY 13 15 3 6 19 3 29 29 30 24 23 29 MIN. QFF PRESSURE IN HPA 1005.5 1007.6 1001.8 1001.9 1000.5 989.6 986.4 986.8 994.7 1001.7 1006.3 1010.2 986.4 DAY 3 7 24 29 6 27 5 8 5 4 8 17 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 768.2 766.9 768.8 772.2 771.1 769.8 769.3 769.8 771.6 774.8 772.3 772.3 770.6 MAX. QFE PRESSURE IN HPA 773.7 772.2 772.2 776.0 774.3 774.3 772.5 772.4 774.1 779.0 776.6 776.2 779.0 DAY 1 17 29 21 17 6 19 29 26 12 23 7 MIN. QFE PRESSURE IN HPA 761.2 760.8 762.0 767.9 763.9 765.4 764.1 766.7 769.3 770.4 766.6 765.4 760.8 DAY 19 9 24 29 5 28 5 8 15 4 8 25 MEAN QNH PRESSURE IN HPA 1014.3 1012.5 1015.0 1019.2 1017.8 1016.2 1015.6 1016.2 1018.5 1022.4 1019.3 1019.3 1017.2 MAX. QNH PRESSURE IN HPA 1021.1 1019.2 1019.2 1024.0 1021.9 1021.9 1019.6 1019.5 1021.6 1027.7 1024.7 1024.2 1027.7 DAY 1 17 29 21 17 6 19 29 26 12 23 7 MIN. QNH PRESSURE IN HPA 1005.4 1004.9 1006.4 1013.8 1008.8 1010.7 1009.1 1012.3 1015.6 1017.0 1012.2 1010.7 1004.9 DAY 19 9 24 29 5 28 5 8 15 4 8 25 MEAN QFF PRESSURE IN HPA 1020.5 1015.7 1011.3 1008.8 1004.6 997.8 993.2 994.6 1000.7 1009.7 1013.5 1017.2 1007.3 MAX. QFF PRESSURE IN HPA 1033.5 1030.3 1016.7 1013.2 1008.2 1005.2 996.6 999.0 1005.4 1012.8 1017.0 1035.0 1035.0 DAY 13 15 3 9 9 3 29 29 28 18 23 29 MIN. QFF PRESSURE IN HPA 1003.6 1007.9 1002.0 1003.0 999.4 991.3 987.2 988.9 996.2 1003.6 1005.9 1009.1 987.2 DAY 19 4 24 26 5 19 5 8 4 4 8 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 768.5 767.1 768.9 772.0 771.1 769.7 769.3 769.7 771.9 775.1 772.7 772.8 770.7 MAX. QFE PRESSURE IN HPA 774.2 772.7 772.2 775.7 774.4 773.8 772.7 772.5 774.3 779.1 777.1 777.0 779.1 DAY 1 17 28 20 17 6 19 29 26 12 23 7 MIN. QFE PRESSURE IN HPA 761.4 761.0 763.3 767.8 764.0 765.5 764.3 766.6 769.2 771.0 767.0 765.1 761.0 DAY 10 9 24 29 5 28 5 7 15 4 8 25 MEAN QNH PRESSURE IN HPA 1014.6 1012.8 1015.1 1019.0 1017.8 1016.1 1015.5 1016.1 1018.9 1022.8 1019.9 1019.9 1017.4 MAX. QNH PRESSURE IN HPA 1021.7 1019.8 1019.2 1023.6 1022.0 1021.2 1019.8 1019.6 1021.9 1027.9 1025.4 1025.2 1027.9 DAY 1 17 28 20 17 6 19 29 26 12 23 7 MIN. QNH PRESSURE IN HPA 1005.7 1005.2 1008.1 1013.7 1008.9 1010.8 1009.3 1012.2 1015.5 1017.7 1012.7 1010.3 1005.2 DAY 10 9 24 29 5 28 5 7 15 4 8 25 MEAN QFF PRESSURE IN HPA 1023.0 1018.3 1013.0 1010.2 1006.0 999.1 994.8 996.6 1003.8 1012.5 1016.1 1020.3 1009.5 MAX. QFF PRESSURE IN HPA 1038.3 1034.9 1019.7 1015.0 1010.1 1005.9 998.5 1001.9 1009.4 1016.8 1020.6 1038.9 1038.9 DAY 13 15 3 9 9 3 28 24 28 24 25 29 MIN. QFF PRESSURE IN HPA 1003.6 1007.7 1005.6 1001.9 999.9 993.1 989.4 991.4 998.7 1004.8 1007.3 1008.4 989.4 DAY 19 4 11 26 5 19 5 7 5 20 8 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 769.1 767.6 769.5 772.6 771.9 770.4 770.0 770.6 772.6 775.8 773.2 773.3 771.4 MAX. QFE PRESSURE IN HPA 774.9 773.5 773.2 777.0 774.7 774.4 772.9 773.2 774.9 780.1 777.3 777.8 780.1 DAY 1 17 28 20 17 6 19 28 2 11 23 7 MIN. QFE PRESSURE IN HPA 761.3 761.9 764.6 768.4 764.9 766.1 765.1 767.4 770.1 771.6 767.2 764.2 761.3 DAY 10 9 23 29 5 28 5 8 15 20 8 25 MEAN QNH PRESSURE IN HPA 1015.4 1013.4 1015.8 1019.7 1018.9 1016.9 1016.5 1017.2 1019.8 1023.8 1020.4 1020.6 1018.2 MAX. QNH PRESSURE IN HPA 1022.6 1020.8 1020.5 1025.2 1022.4 1022.0 1020.1 1020.5 1022.6 1029.1 1025.6 1026.2 1029.1 DAY 1 17 28 20 17 6 19 28 2 11 23 7 MIN. QNH PRESSURE IN HPA 1005.6 1006.3 1009.7 1014.5 1010.1 1011.6 1010.3 1013.2 1016.6 1018.5 1013.0 1009.2 1005.6 DAY 10 9 23 29 5 28 5 8 15 20 8 25 MEAN QFF PRESSURE IN HPA 1024.0 1018.4 1012.4 1009.1 1005.0 997.3 993.5 995.0 1001.5 1011.1 1015.6 1020.3 1008.6 MAX. QFF PRESSURE IN HPA 1039.6 1033.5 1019.2 1014.0 1009.4 1004.5 997.4 999.3 1006.7 1016.0 1021.3 1038.4 1039.6 DAY 13 15 6 18 10 3 28 17 30 24 25 28 MIN. QFF PRESSURE IN HPA 1007.2 1008.0 1006.1 1002.3 1000.5 991.3 987.5 989.1 996.2 1004.2 1009.0 1007.5 987.5 DAY 10 4 23 26 5 19 5 8 5 20 7 25 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 768.9 767.3 769.4 772.6 771.9 770.3 770.2 770.8 772.5 775.6 773.0 773.2 771.3 MAX. QFE PRESSURE IN HPA 774.5 773.2 773.7 776.9 774.8 774.3 772.7 773.4 775.0 779.8 776.6 777.6 779.8 DAY 1 17 28 20 17 16 19 29 2 11 23 7 MIN. QFE PRESSURE IN HPA 758.4 762.0 762.5 767.9 764.1 766.3 765.0 767.2 770.1 771.4 768.0 764.5 758.4 DAY 22 8 23 29 5 27 5 7 5 20 8 25 MEAN QNH PRESSURE IN HPA 1015.1 1013.1 1015.8 1019.7 1018.9 1016.8 1016.7 1017.4 1019.7 1023.5 1020.3 1020.4 1018.1 MAX. QNH PRESSURE IN HPA 1022.1 1020.5 1021.1 1025.1 1022.5 1021.9 1019.8 1020.7 1022.7 1028.7 1024.7 1026.0 1028.7 DAY 1 17 28 20 17 16 19 29 2 11 23 7 MIN. QNH PRESSURE IN HPA 1001.9 1006.4 1007.1 1013.8 1009.1 1011.8 1010.2 1013.0 1016.6 1018.2 1014.0 1009.6 1001.9 DAY 22 8 23 29 5 27 5 7 5 20 8 25 MEAN QFF PRESSURE IN HPA 1021.6 1016.6 1012.0 1008.8 1004.7 996.8 993.0 994.6 1000.6 1009.7 1013.7 1018.1 1007.5 MAX. QFF PRESSURE IN HPA 1036.3 1029.9 1017.8 1015.6 1008.1 1004.8 998.1 999.2 1007.1 1014.4 1018.4 1036.4 1036.4 DAY 13 17 2 16 10 3 28 17 30 23 25 31 MIN. QFF PRESSURE IN HPA 1001.8 1007.6 1000.2 1000.0 1000.0 990.7 987.0 987.7 995.5 1002.5 1007.7 1007.4 987.0 DAY 22 4 23 26 5 19 5 7 11 4 8 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.2 -3.0 1.3 8.2 14.6 20.0 23.1 22.8 18.7 12.3 5.8 -0.5 9.9 MINIMUN AIR TEMPERATURE (C) -11.1 -8.8 -3.7 2.5 7.3 10.7 14.1 13.7 9.4 4.9 -0.1 -6.0 2.7 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.1 DAYS WITH MINIMUM TEMP. <=-4 25.3 20.3 13.4 1.8 0.0 0.0 0.0 0.0 0.0 0.0 3.7 17.3 81.8 DAYS WITH FREEZING MIN.<= 0 29.7 26.8 23.6 6.7 0.2 0.0 0.0 0.0 0.0 1.0 15.7 25.9 129.6 TEMPERATURE RECORDS LOWEST(C) -30.6 -27.4 -21.6 -11.6 -1.4 5.0 7.4 6.8 2.4 -2.6 -13.0 -25.6 -30.6 YEAR-DAY 92-29 0-10 92- 1 92- 2 97- 6 93- 5 95- 2 87-30 94-23 90-31 2-27 4-29 92-29 MAXIMUM AIR TEMPERATURE (C) 1.0 3.1 6.5 13.2 20.1 26.5 30.0 30.0 26.0 19.1 11.7 5.3 16.0 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.0 0.0 0.0 2.1 16.5 17.4 1.3 0.0 0.0 0.0 37.3 DAYS WITH MAXIMUM TEMP. <= 0 12.5 4.9 0.8 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 3.7 22.1 TEMPERATURE RECORDS HIGHEST(C) 11.4 10.6 16.4 23.4 28.2 32.4 35.8 34.8 31.2 26.6 20.2 19.6 35.8 YEAR-DAY 94- 1 96- 9 1-31 5-24 99-31 89-26 91-11 94- 4 91-10 96- 1 96- 5 98-10 91-11 DIF. BETWEEN (MAX.-MIN.) (C) 12.1 11.9 10.2 10.7 12.8 15.8 15.9 16.3 16.6 14.2 11.8 11.3 13.3 MEAN DAILY TEMP. (MDT) (C) -5.1 -2.9 1.4 7.8 13.7 18.6 22.0 21.8 17.7 12.0 5.8 -0.3 9.4 STANDARD DEVIATION OF MDT(C) 1.99 1.70 1.80 2.05 1.15 0.65 0.74 0.70 0.76 0.96 0.96 2.72 1.35 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 2.2 41.9 33.5 0.7 0.0 0.0 0.0 78.3 HEATING DEG. DAYS(BASE 18 0C) 715.3 588.5 515.6 304.9 134.3 14.5 0.4 0.4 31.1 186.4 365.0 568.0 3424.4 DEWPOINT (MEAN C) -10.6 -9.2 -5.9 -2.5 -0.6 -0.3 2.7 1.5 -2.2 -2.5 -4.4 -7.9 -3.5 MIXING RATIO (G/KG) 2.44 2.71 3.40 4.34 4.94 5.07 6.23 5.70 4.38 4.31 3.79 2.97 4.19 VAPOUR PRESSURE (HPA) 3.00 3.33 4.17 5.34 6.08 6.22 7.62 7.00 5.40 5.32 4.68 3.67 5.15 SATURATION DEF. (HPA) 1.56 1.95 2.88 6.11 11.32 18.26 21.93 22.06 17.39 9.78 5.04 2.74 10.09 RELATIVE HUMIDITY (MEAN %) 69 65 62 51 39 29 29 27 27 40 53 62 46 RELATIVE HUMIDITY (MAX. %) 84 82 80 72 63 50 49 45 46 62 75 81 66 RELATIVE HUMIDITY (MIN. %) 51 48 45 34 24 16 17 16 15 24 34 44 31 RELATIVE HUMIDITY (MEAN% 03UTC) 76 73 71 65 58 49 49 45 45 59 70 71 61 RELATIVE HUMIDITY (MEAN% 09UTC) 63 58 54 41 29 19 20 18 17 28 41 54 37 RELATIVE HUMIDITY (MEAN% 15UTC) 65 62 58 46 32 21 21 20 20 33 47 58 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 223.7 227.1 317.6 152.1 45.2 1.1 1.1 1.2 1.1 40.6 171.9 259.1 1441.8 DAYS WITH PRECIPITATION >=10 6.2 6.3 7.7 4.9 1.5 0.0 0.0 0.0 0.1 1.6 4.0 6.8 39.1 DAYS WITH PRECIPITATION >= 5 8.3 7.9 9.6 6.3 2.4 0.1 0.1 0.1 0.1 2.5 5.7 8.3 51.4 DAYS WITH PRECIPITATION >= 1 11.3 10.8 12.6 8.9 4.4 0.4 0.3 0.4 0.3 4.0 7.4 10.5 71.3 DAYS WITH PRECIPITATION 12.6 13.3 14.6 11.4 6.4 1.2 1.1 0.8 0.6 5.9 8.8 12.0 88.7 GREATEST DAILY PRECIPITATION 145.0 123.0 177.0 107.0 65.0 7.0 7.0 8.0 12.0 40.2 120.0 142.0 177.0 YEAR-DAY 93- 8 93-21 5-12 4- 4 97- 5 97- 1 98-25 1-12 95-20 1-29 5- 8 89- 4 5 DAY WITH THUNDER STORM 2.0 2.3 4.9 4.3 2.9 0.4 0.5 0.4 0.2 1.3 3.3 4.0 26.5 DAYS WITH SNOW OR SLEET 12.4 12.4 11.8 2.2 0.1 0.0 0.0 0.0 0.0 0.1 4.0 11.1 54.1 DAYS WITH DUST 0.5 1.1 0.5 0.5 1.5 0.6 0.3 0.2 0.4 0.1 0.0 0.2 5.9 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 10.4 10.5 10.0 9.0 8.0 8.2 8.0 8.3 8.2 8.2 8.6 9.6 8.9 PREVAILING WIND PERCENT 9.5 12.1 17.5 22.0 17.7 15.4 11.5 11.5 14.5 13.9 12.8 10.9 14.1 CALMS PERCENT OF WIND 76.0 67.9 59.9 53.1 56.5 63.3 69.3 68.5 65.4 68.4 69.7 71.8 65.8 NO. OF WIND OBSERVATION 214.5 203.3 223.5 217.8 228.4 219.2 226.4 228.8 216.9 228.4 216.2 218.6 2642.0 VECTOR WIND DIRECTION (MEAN) 262 256 259 267 279 272 259 255 269 275 265 261 265 VECTOR WIND MAGNITUDE(KNOTS) 1.6 2.3 2.9 3.0 2.5 2.0 1.2 1.3 1.9 1.8 1.8 1.9 2.0 WIND STEADINESES (MEAN %) 66.7 71.9 74.4 71.4 67.6 69.0 50.0 52.0 67.9 66.7 66.7 65.5 66.7 WIND SPEED (MEAN KNOTS) 2.4 3.2 3.9 4.2 3.7 2.9 2.4 2.5 2.8 2.7 2.7 2.9 3.0 FASTEST WIND DIRECTION 260 180 210 300 200 350 10 290 280 260 250 270 270 FASTEST WIND SPEED (KNOTS) 39 54 54 35 39 29 27 29 27 31 39 58 58 YEAR-DAY 95-18 93-11 3-26 88-30 87- 6 3- 1 0- 4 96-28 90- 2 95-12 4-18 91- 9 91 DAYS WITH SKY CLEAR (0-2)/8 16.2 14.3 13.3 12.3 20.3 26.9 26.7 27.3 28.3 22.7 16.3 16.1 240.7 DAYS WITH P.CLOUDY (3-6)/8 7.6 7.3 9.2 11.4 7.8 2.8 4.2 3.7 1.6 6.0 8.4 8.1 78.1 DAYS WITH CLOUDY (7-8)/8 7.2 6.7 8.5 6.4 2.9 0.2 0.1 0.1 0.1 2.3 5.3 6.8 46.6 DAYS WITH VISIBILITY =< 2 KM 8.6 6.6 5.5 1.1 0.3 0.0 0.0 0.0 0.0 0.3 1.7 5.7 29.8 DURATION OF SUNSHINE HOURS 138.0 156.9 186.4 228.0 309.9 338.8 340.6 326.9 299.2 247.3 187.6 144.1 2903.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 768.6 768.2 768.3 770.5 771.3 769.9 768.9 770.4 772.5 774.3 772.8 771.1 770.6 MAX. QFE PRESSURE IN HPA 779.1 779.0 779.5 780.2 779.0 776.5 776.6 776.7 779.8 781.7 780.3 781.6 781.7 YEAR-DAY 3-12 2- 6 2-11 98-12 98- 8 99- 1 0-30 99-19 94-23 5-12 3-25 98-10 5-12 MIN. QFE PRESSURE IN HPA 754.0 755.6 756.2 759.6 762.4 763.7 763.0 764.4 764.9 767.8 760.3 755.2 754.0 YEAR-DAY 92-30 92-25 91- 6 4-17 4-13 88-30 90- 5 89- 1 0- 2 96- 5 1-18 88-27 92-30 MEAN QNH PRESSURE IN HPA 1014.7 1014.2 1014.4 1017.1 1018.1 1016.3 1015.1 1017.0 1019.6 1021.8 1020.0 1017.8 1017.2 MAX. QNH PRESSURE IN HPA 1027.9 1027.7 1028.4 1029.2 1027.7 1024.6 1024.7 1024.9 1028.7 1031.1 1029.4 1031.0 1031.1 YEAR-DAY 3-12 2- 6 2-11 98-12 98- 8 99- 1 0-30 99-19 94-23 5-12 3-25 98-10 5-12 MIN. QNH PRESSURE IN HPA 996.4 998.4 999.2 1003.4 1006.9 1008.6 1007.7 1009.4 1010.1 1013.7 1004.3 997.9 996.4 YEAR-DAY 92-30 92-25 91- 6 4-17 4-13 88-30 90- 5 89- 1 0- 2 96- 5 1-18 88-27 92-30 MEAN QFF PRESSURE IN HPA 1020.4 1017.0 1013.1 1008.9 1004.4 997.7 994.0 995.8 1002.1 1010.0 1014.3 1019.0 1008.1 MAX. QFF PRESSURE IN HPA 1044.2 1043.9 1033.1 1022.9 1015.8 1008.5 1005.6 1007.2 1015.9 1020.6 1029.2 1045.6 1045.6 YEAR-DAY 1-29 0-10 92-13 93- 1 97- 6 92- 7 0-31 96-31 1-24 92-30 1-20 4-30 4-30 MIN. QFF PRESSURE IN HPA 997.7 992.8 993.8 993.5 993.8 988.3 984.0 985.1 991.3 998.0 996.2 997.7 984.0 YEAR-DAY 5-23 92-25 98-30 2- 3 1-29 99-25 95-16 94- 1 0- 2 98- 1 94-25 94- 3 95-16 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 769.1 767.9 768.1 770.1 771.0 769.8 769.2 770.6 772.5 774.3 772.5 771.4 770.5 MAX. QFE PRESSURE IN HPA 777.6 777.7 778.2 778.9 777.2 775.3 775.7 775.8 777.6 780.2 779.0 780.6 780.6 YEAR-DAY 3-12 2- 6 2-12 3- 8 98- 8 99- 2 0-31 99-20 4-27 5-12 3-26 98-10 98-10 MIN. QFE PRESSURE IN HPA 755.5 755.6 757.5 761.2 762.8 764.4 764.0 765.0 766.2 768.8 763.4 758.4 755.5 YEAR-DAY 5-23 92-25 98-30 2- 4 4-14 99-25 97-12 89- 2 0- 2 96- 6 94-26 94- 5 5-23 MEAN QNH PRESSURE IN HPA 1015.3 1013.8 1014.1 1016.5 1017.8 1016.2 1015.5 1017.3 1019.5 1021.8 1019.6 1018.3 1017.2 MAX. QNH PRESSURE IN HPA 1026.0 1026.1 1026.7 1027.6 1025.5 1023.1 1023.6 1023.7 1026.0 1029.2 1027.7 1029.7 1029.7 YEAR-DAY 3-12 2- 6 2-12 3- 8 98- 8 99- 2 0-31 99-20 4-27 5-12 3-26 98-10 98-10 MIN. QNH PRESSURE IN HPA 998.3 998.4 1000.8 1005.4 1007.4 1009.4 1008.9 1010.2 1011.7 1015.0 1008.2 1001.9 998.3 YEAR-DAY 5-23 92-25 98-30 2- 4 4-14 99-25 97-12 89- 2 0- 2 96- 6 94-26 94- 5 5-23 MEAN QFF PRESSURE IN HPA 1019.3 1015.7 1012.3 1008.1 1004.1 997.9 994.0 995.7 1001.8 1009.4 1013.5 1018.1 1007.5 MAX. QFF PRESSURE IN HPA 1039.0 1037.4 1028.0 1019.7 1013.9 1007.3 1005.2 1004.8 1011.7 1018.3 1026.6 1042.4 1042.4 YEAR-DAY 96-26 0-11 92-13 97-13 97- 6 4- 1 2-31 92-31 1-23 94-20 2-28 4-30 4-30 MIN. QFF PRESSURE IN HPA 997.7 992.8 993.8 995.7 993.9 988.3 985.6 987.1 993.0 1000.6 1001.4 1000.8 985.6 YEAR-DAY 5-23 92-25 98-30 2- 3 4-12 99-25 95-17 94- 4 0- 3 96- 6 4-23 94- 4 95-17 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 768.4 767.9 768.1 770.4 771.4 770.2 769.4 771.0 772.9 774.5 772.9 771.0 770.7 MAX. QFE PRESSURE IN HPA 777.7 778.5 778.6 779.7 778.4 775.9 776.0 776.2 778.9 781.1 779.4 780.8 781.1 YEAR-DAY 3-12 87- 1 2-11 98-12 98- 8 87-28 96- 4 99-20 94-23 5-12 90-23 98-10 5-12 MIN. QFE PRESSURE IN HPA 754.3 756.8 757.0 759.6 763.2 764.4 763.5 765.6 766.6 768.7 763.8 755.2 754.3 YEAR-DAY 98-13 92-25 97-29 4-17 4-14 88-30 90- 5 89- 2 0- 2 90-14 94-26 88-27 98-13 MEAN QNH PRESSURE IN HPA 1014.5 1013.9 1014.1 1017.0 1018.2 1016.8 1015.8 1017.7 1020.1 1022.1 1020.1 1017.7 1017.3 MAX. QNH PRESSURE IN HPA 1026.1 1027.1 1027.2 1028.6 1027.0 1023.9 1024.0 1024.2 1027.6 1030.4 1028.2 1030.0 1030.4 YEAR-DAY 3-12 87- 1 2-11 98-12 98- 8 87-28 96- 4 99-20 94-23 5-12 90-23 98-10 5-12 MIN. QNH PRESSURE IN HPA 996.8 999.9 1000.2 1003.4 1007.9 1009.4 1008.3 1011.0 1012.2 1014.8 1008.7 997.9 996.8 YEAR-DAY 98-13 92-25 97-29 4-17 4-14 88-30 90- 5 89- 2 0- 2 90-14 94-26 88-27 98-13 MEAN QFF PRESSURE IN HPA 1020.9 1018.1 1013.8 1010.1 1005.5 999.4 995.6 998.2 1004.8 1012.2 1015.8 1019.4 1009.5 MAX. QFF PRESSURE IN HPA 1044.3 1041.0 1033.1 1024.0 1015.8 1008.4 1005.8 1007.2 1019.1 1020.6 1029.1 1045.6 1045.6 YEAR-DAY 92-10 0-11 92-13 89- 2 97- 6 5- 4 87-30 96-31 94-23 92-30 2-28 4-30 4-30 MIN. QFF PRESSURE IN HPA 1002.3 995.7 997.7 993.5 994.1 989.7 987.3 989.5 995.9 1001.1 1002.2 996.9 987.3 YEAR-DAY 97-16 92-25 92-31 2- 3 4-12 99-25 95-17 91-11 94- 1 90-14 93-11 88-26 95-17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 769.4 768.9 769.1 771.2 771.9 770.5 769.7 771.4 773.5 775.3 773.9 772.0 771.4 MAX. QFE PRESSURE IN HPA 779.1 779.0 779.5 780.2 779.0 776.5 776.1 776.7 779.8 781.7 780.3 781.6 781.7 YEAR-DAY 3-12 2- 6 2-11 98-12 98- 8 99- 1 0-30 99-19 94-23 5-12 3-25 98-10 5-12 MIN. QFE PRESSURE IN HPA 756.3 757.6 756.4 760.7 763.5 764.4 763.5 765.9 766.8 768.9 764.8 756.9 756.3 YEAR-DAY 98-13 90-10 97-29 2- 3 4-13 88-30 90- 5 89- 2 0- 2 90-14 1-18 88-27 98-13 MEAN QNH PRESSURE IN HPA 1015.8 1015.1 1015.3 1018.0 1018.8 1017.1 1016.1 1018.2 1020.8 1023.2 1021.3 1018.9 1018.2 MAX. QNH PRESSURE IN HPA 1027.9 1027.7 1028.4 1029.2 1027.7 1024.6 1024.1 1024.9 1028.7 1031.1 1029.4 1031.0 1031.1 YEAR-DAY 3-12 2- 6 2-11 98-12 98- 8 99- 1 0-30 99-19 94-23 5-12 3-25 98-10 5-12 MIN. QNH PRESSURE IN HPA 999.3 1000.9 999.4 1004.8 1008.3 1009.4 1008.3 1011.3 1012.5 1015.1 1009.9 1000.0 999.3 YEAR-DAY 98-13 90-10 97-29 2- 3 4-13 88-30 90- 5 89- 2 0- 2 90-14 1-18 88-27 98-13 MEAN QFF PRESSURE IN HPA 1022.3 1018.5 1014.2 1009.5 1004.6 997.7 994.2 996.5 1002.6 1011.0 1015.8 1020.6 1009.0 MAX. QFF PRESSURE IN HPA 1044.1 1041.7 1031.1 1022.1 1015.7 1008.4 1004.0 1006.3 1012.7 1019.3 1028.6 1043.3 1044.1 YEAR-DAY 1-29 0-11 92-13 97-14 97- 6 95- 1 0-31 92-31 4-27 4-25 2-27 4-30 1-29 MIN. QFF PRESSURE IN HPA 1001.0 999.6 997.4 995.5 994.3 989.6 985.2 987.4 993.2 1001.1 1004.4 1002.2 985.2 YEAR-DAY 93- 8 94- 1 97-29 2- 3 4-13 3-30 95-17 94- 1 0- 3 98- 1 99- 1 2-21 95-17 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 768.8 768.6 768.8 770.9 771.6 770.0 769.0 770.5 772.5 774.3 772.8 771.2 770.7 MAX. QFE PRESSURE IN HPA 777.9 778.4 778.5 779.6 778.2 775.9 775.8 775.4 778.8 780.3 778.9 779.8 780.3 YEAR-DAY 3-12 2- 6 2-11 98-12 98- 8 98- 6 96- 3 99-19 94-23 5-12 98-21 98- 9 5-12 MIN. QFE PRESSURE IN HPA 756.0 759.3 756.2 760.6 763.1 764.2 763.0 765.2 765.7 768.5 762.1 756.6 756.0 YEAR-DAY 98-13 90-10 97-29 2- 3 4-13 88-30 90- 5 88-23 0- 2 96- 5 1-18 88-27 98-13 MEAN QNH PRESSURE IN HPA 1015.0 1014.7 1014.9 1017.6 1018.4 1016.4 1015.2 1017.1 1019.6 1021.8 1020.0 1017.9 1017.4 MAX. QNH PRESSURE IN HPA 1026.4 1027.0 1027.1 1028.5 1026.7 1023.9 1023.7 1023.2 1027.5 1029.4 1027.6 1028.7 1029.4 YEAR-DAY 3-12 2- 6 2-11 98-12 98- 8 98- 6 96- 3 99-19 94-23 5-12 98-21 98- 9 5-12 MIN. QNH PRESSURE IN HPA 998.9 1003.1 999.2 1004.7 1007.8 1009.2 1007.7 1010.5 1011.1 1014.6 1006.6 999.7 998.9 YEAR-DAY 98-13 90-10 97-29 2- 3 4-13 88-30 90- 5 88-23 0- 2 96- 5 1-18 88-27 98-13 MEAN QFF PRESSURE IN HPA 1019.7 1016.5 1012.9 1008.6 1004.0 996.8 992.9 994.6 1000.6 1008.5 1013.1 1018.1 1007.2 MAX. QFF PRESSURE IN HPA 1039.4 1037.5 1028.8 1020.6 1014.9 1008.2 1002.6 1004.2 1010.2 1017.2 1025.9 1038.8 1039.4 YEAR-DAY 96-26 0-10 92-12 97-13 97- 6 92- 7 0-31 92-31 89-23 0-30 2-27 4-29 96-26 MIN. QFF PRESSURE IN HPA 999.0 1000.3 995.5 996.7 994.0 988.6 984.0 985.1 991.3 998.0 1000.9 998.9 984.0 YEAR-DAY 93- 8 3-20 3-26 2- 3 1-26 92-28 95-16 94- 1 0- 2 98- 1 4-23 2-21 95-16 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 767.9 767.6 767.9 770.2 770.9 769.4 768.3 769.6 771.6 773.5 772.0 770.3 769.9 MAX. QFE PRESSURE IN HPA 776.8 776.9 777.2 778.3 776.7 775.3 775.0 774.6 777.7 779.0 778.0 779.0 779.0 YEAR-DAY 3-12 2- 6 2-11 98-12 98- 8 3- 2 96- 3 99-19 94-23 5-12 3-25 98- 9 98- 9 MIN. QFE PRESSURE IN HPA 756.3 757.0 756.2 761.1 762.4 763.9 763.0 764.5 764.9 767.8 760.3 756.9 756.2 YEAR-DAY 3-28 92-24 91- 6 4-17 4-13 1-11 90- 5 89- 1 0- 2 96- 5 1-18 88-27 91- 6 MEAN QNH PRESSURE IN HPA 1013.9 1013.5 1013.8 1016.7 1017.6 1015.7 1014.3 1015.9 1018.5 1020.8 1019.0 1016.9 1016.4 MAX. QNH PRESSURE IN HPA 1025.0 1025.1 1025.5 1026.9 1024.9 1023.1 1022.7 1022.2 1026.1 1027.7 1026.5 1027.7 1027.7 YEAR-DAY 3-12 2- 6 2-11 98-12 98- 8 3- 2 96- 3 99-19 94-23 5-12 3-25 98- 9 98- 9 MIN. QNH PRESSURE IN HPA 999.3 1000.2 999.2 1005.3 1006.9 1008.8 1007.7 1009.6 1010.1 1013.7 1004.3 1000.0 999.2 YEAR-DAY 3-28 92-24 91- 6 4-17 4-13 1-11 90- 5 89- 1 0- 2 96- 5 1-18 88-27 91- 6 MEAN QFF PRESSURE IN HPA 1018.5 1015.5 1012.1 1008.2 1004.0 997.4 993.2 994.7 1000.9 1008.6 1012.8 1017.5 1006.9 MAX. QFF PRESSURE IN HPA 1037.2 1035.9 1028.1 1020.2 1013.5 1008.5 1004.5 1003.4 1008.6 1017.8 1025.7 1037.3 1037.3 YEAR-DAY 96-26 0-10 92-12 97-13 97- 6 92- 7 2-31 92-31 4-26 94-19 1-20 4-29 4-29 MIN. QFF PRESSURE IN HPA 998.2 996.2 997.3 998.0 995.0 989.2 984.9 986.4 992.1 999.0 1001.3 997.7 984.9 YEAR-DAY 3-28 92-24 98-18 98-21 4-13 97-29 95-16 94- 3 0- 2 96- 5 94-25 94- 3 95-16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 768.4 767.9 768.0 770.2 770.9 769.3 768.2 769.5 771.8 773.8 772.5 770.9 770.1 MAX. QFE PRESSURE IN HPA 776.8 777.5 777.6 777.4 776.1 775.2 774.4 775.0 777.7 779.1 778.8 780.2 780.2 YEAR-DAY 3- 7 87- 1 4- 8 3- 8 87-12 99- 1 0-30 87- 8 94-23 5-12 3-25 98- 9 98- 9 MIN. QFE PRESSURE IN HPA 754.0 756.5 757.0 761.5 762.8 763.7 763.3 764.4 765.4 768.2 761.1 759.0 754.0 YEAR-DAY 92-30 90-15 89-15 2- 3 90-12 88-30 90- 5 89- 1 0- 2 96- 5 94-25 91-31 92-30 MEAN QNH PRESSURE IN HPA 1014.4 1013.9 1013.9 1016.7 1017.6 1015.6 1014.2 1015.9 1018.7 1021.2 1019.6 1017.6 1016.6 MAX. QNH PRESSURE IN HPA 1025.0 1025.9 1026.0 1025.7 1024.1 1023.0 1022.0 1022.7 1026.1 1027.9 1027.5 1029.2 1029.2 YEAR-DAY 3- 7 87- 1 4- 8 3- 8 87-12 99- 1 0-30 87- 8 94-23 5-12 3-25 98- 9 98- 9 MIN. QNH PRESSURE IN HPA 996.4 999.5 1000.2 1005.8 1007.4 1008.6 1008.1 1009.4 1010.7 1014.2 1005.3 1002.7 996.4 YEAR-DAY 92-30 90-15 89-15 2- 3 90-12 88-30 90- 5 89- 1 0- 2 96- 5 94-25 91-31 92-30 MEAN QFF PRESSURE IN HPA 1020.8 1017.9 1013.4 1009.6 1004.8 998.3 994.2 996.5 1003.5 1011.4 1015.4 1019.3 1008.8 MAX. QFF PRESSURE IN HPA 1042.3 1041.9 1032.4 1022.1 1013.8 1007.7 1007.6 1006.4 1016.7 1019.2 1029.2 1043.2 1043.2 YEAR-DAY 92- 9 0-10 92-12 97- 1 97- 6 92- 7 87-29 96-30 94-23 92-30 1-20 90-28 90-28 MIN. QFF PRESSURE IN HPA 996.0 998.8 996.8 998.5 994.1 989.6 986.0 988.3 994.2 1002.1 996.2 998.4 986.0 YEAR-DAY 92-30 90-15 89-15 94-30 90-12 97-29 95-20 94- 6 94- 1 98- 2 94-25 94- 3 95-20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 769.5 768.6 768.9 770.9 771.7 770.1 769.3 770.8 772.8 774.7 772.9 772.0 771.0 MAX. QFE PRESSURE IN HPA 777.8 777.5 778.4 778.0 777.0 776.0 775.7 776.7 778.0 780.1 779.5 781.1 781.1 YEAR-DAY 3- 7 2- 6 4- 8 3- 8 98- 8 99- 1 0-30 99-19 1-23 5-11 3-25 98- 9 98- 9 MIN. QFE PRESSURE IN HPA 758.6 759.4 758.6 762.0 763.8 765.2 764.0 764.8 766.4 769.0 761.2 759.2 758.6 YEAR-DAY 3-28 92-10 97- 7 2- 3 4-13 3-30 95-16 89- 1 0- 2 96- 5 94-25 94- 3 97- 7 MEAN QNH PRESSURE IN HPA 1015.9 1014.7 1015.1 1017.6 1018.6 1016.6 1015.6 1017.4 1019.9 1022.3 1020.2 1018.9 1017.7 MAX. QNH PRESSURE IN HPA 1026.2 1025.9 1027.0 1026.5 1025.2 1024.0 1023.6 1024.9 1026.5 1029.1 1028.4 1030.4 1030.4 YEAR-DAY 3- 7 2- 6 4- 8 3- 8 98- 8 99- 1 0-30 99-19 1-23 5-11 3-25 98- 9 98- 9 MIN. QNH PRESSURE IN HPA 1002.2 1003.2 1002.2 1006.4 1008.7 1010.5 1008.9 1009.9 1012.0 1015.2 1005.4 1002.9 1002.2 YEAR-DAY 3-28 92-10 97- 7 2- 3 4-13 3-30 95-16 89- 1 0- 2 96- 5 94-25 94- 3 97- 7 MEAN QFF PRESSURE IN HPA 1021.7 1018.0 1013.5 1009.0 1004.3 997.2 993.5 995.5 1001.9 1010.1 1014.9 1019.9 1008.3 MAX. QFF PRESSURE IN HPA 1042.4 1043.9 1031.1 1021.9 1014.4 1006.4 1003.1 1005.6 1012.7 1017.6 1028.9 1043.3 1043.9 YEAR-DAY 96-25 0-10 92-12 97- 1 97- 6 95- 2 0-30 96-30 1-23 4-24 2-27 4-29 0-10 MIN. QFF PRESSURE IN HPA 1000.9 999.5 996.3 1000.5 994.9 989.8 984.4 986.9 993.0 1001.0 998.7 1000.7 984.4 YEAR-DAY 93- 8 99-20 92-30 98-21 1-29 97-29 95-16 94- 1 0- 2 96- 5 94-25 94- 3 95-16 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 769.3 768.4 768.8 770.7 771.6 770.1 769.5 770.9 772.8 774.6 772.8 771.7 770.9 MAX. QFE PRESSURE IN HPA 777.8 777.5 778.6 778.4 777.4 775.8 776.6 776.3 777.8 779.8 779.5 780.8 780.8 YEAR-DAY 3- 7 2- 6 2-11 98-11 98- 8 99- 1 0-30 99-19 1-22 5-11 3-25 98- 9 98- 9 MIN. QFE PRESSURE IN HPA 758.4 759.1 758.3 761.3 763.5 765.0 764.4 764.4 766.5 769.0 762.4 759.6 758.3 YEAR-DAY 5-22 98-15 92-30 2- 3 4-13 99-24 95-16 89- 1 0- 1 95-15 94-25 94- 4 92-30 MEAN QNH PRESSURE IN HPA 1015.6 1014.5 1014.9 1017.3 1018.4 1016.6 1015.8 1017.6 1019.9 1022.2 1020.0 1018.6 1017.6 MAX. QNH PRESSURE IN HPA 1026.2 1025.9 1027.2 1027.0 1025.7 1023.7 1024.7 1024.4 1026.2 1028.7 1028.4 1030.0 1030.0 YEAR-DAY 3- 7 2- 6 2-11 98-11 98- 8 99- 1 0-30 99-19 1-22 5-11 3-25 98- 9 98- 9 MIN. QNH PRESSURE IN HPA 1001.9 1002.8 1001.8 1005.6 1008.3 1010.2 1009.4 1009.4 1012.1 1015.2 1006.9 1003.4 1001.8 YEAR-DAY 5-22 98-15 92-30 2- 3 4-13 99-24 95-16 89- 1 0- 1 95-15 94-25 94- 4 92-30 MEAN QFF PRESSURE IN HPA 1019.6 1016.2 1012.4 1008.2 1003.8 996.8 993.1 994.8 1000.9 1008.8 1013.3 1018.2 1007.2 MAX. QFF PRESSURE IN HPA 1039.2 1039.2 1029.9 1020.5 1014.4 1006.1 1004.1 1004.4 1012.1 1016.9 1026.3 1042.4 1042.4 YEAR-DAY 96-25 0-10 92-12 97-13 97- 6 92- 7 0-30 92-31 1-22 94-19 2-27 4-29 4-29 MIN. QFF PRESSURE IN HPA 1001.5 999.3 997.6 996.8 993.8 988.9 984.7 986.5 992.1 998.6 1001.3 1002.2 984.7 YEAR-DAY 93- 8 94-11 92-30 98-22 1-29 99-24 95-16 94- 1 0- 2 96- 5 94-25 2-21 95-16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 1 LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 -4.1 -0.4 0.7 6.8 17.5 22.3 23.3 22.9 20.0 11.1 7.6 0.4 10.7 1988 -3.6 -3.5 2.2 8.4 16.6 21.0 24.8 23.5 20.2 14.9 5.9 1.4 11.0 1989 -8.4 -6.3 1.1 8.0 13.8 20.4 23.1 22.8 18.0 12.8 6.4 -2.5 9.1 1990 -5.6 -2.8 1.8 9.0 17.7 22.9 24.1 24.6 21.3 13.5 8.7 2.4 11.5 1991 -3.4 -2.8 2.0 10.8 15.6 21.6 25.6 25.0 20.5 12.0 7.3 -1.9 11.0 1992 -8.0 -5.5 -4.1 4.1 11.7 18.2 23.1 21.3 16.8 11.3 5.3 -2.5 7.6 1993 -7.0 -3.6 -0.3 5.1 12.2 19.2 22.2 21.9 19.0 11.5 5.3 3.2 9.1 1994 -2.5 -2.2 1.8 10.1 13.9 20.1 25.2 24.4 17.5 11.1 5.0 -3.0 10.1 1995 -3.1 -2.5 1.7 7.2 13.4 18.3 23.2 23.1 18.0 11.3 6.7 -5.4 9.3 1996 -7.1 -0.9 0.3 6.3 14.6 19.8 21.2 21.8 18.7 11.8 5.6 0.3 9.4 1997 -5.3 -4.4 -0.6 4.8 13.1 18.7 23.4 23.4 17.8 12.2 3.9 -2.2 8.7 1998 -5.6 -3.2 0.8 9.3 14.7 19.8 22.4 22.6 18.7 12.4 7.8 5.8 10.5 1999 -4.2 -1.5 1.0 9.1 16.0 20.4 22.4 22.4 18.4 12.5 5.7 0.2 10.2 2000 -4.9 -5.0 0.8 11.5 16.0 19.9 22.3 22.3 18.0 10.8 3.9 -2.7 9.4 2001 -7.2 -3.6 3.1 11.2 15.2 19.8 22.6 22.0 17.8 13.2 4.7 0.2 9.9 2002 -4.4 -1.0 3.5 7.9 14.6 19.5 21.7 22.1 19.3 13.3 4.0 -1.6 9.9 2003 -3.8 -1.0 2.3 9.5 13.5 19.5 23.5 22.8 18.4 13.6 5.7 1.3 10.4 2004 -2.7 -1.7 4.4 7.1 13.9 19.3 21.6 22.4 18.4 12.4 6.1 -4.3 9.7 2005 -7.3 -4.5 2.8 10.1 13.4 19.4 23.5 22.5 18.4 12.8 5.1 1.1 9.8 MEAN -5.2 -3.0 1.3 8.2 14.6 20.0 23.1 22.8 18.7 12.3 5.8 -0.5 9.9 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 2 LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M AVERAGE OF MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 -11.6 -6.8 -4.0 0.4 9.4 11.5 13.2 12.4 9.7 5.4 0.3 -5.4 2.9 1988 -10.0 -9.5 -2.9 2.8 7.9 11.1 14.7 13.8 9.4 6.1 -0.2 -3.6 3.3 1989 -15.3 -13.4 -4.2 1.2 6.5 10.3 14.1 14.2 9.5 4.7 0.4 -9.0 1.6 1990 -12.3 -9.0 -3.9 2.6 8.1 11.3 14.8 14.6 10.0 4.7 -0.1 -4.5 3.0 1991 -9.0 -8.9 -3.1 3.6 6.6 11.1 14.0 13.6 9.8 4.6 -0.3 -7.5 2.9 1992 -14.7 -10.7 -9.9 -1.3 5.9 10.4 14.5 13.1 8.9 2.3 0.2 -6.6 1.0 1993 -12.6 -8.4 -4.5 1.0 6.3 10.2 14.0 13.9 10.2 4.2 0.7 -2.2 2.7 1994 -7.6 -7.7 -2.6 3.5 7.0 10.6 15.0 14.8 8.3 5.7 0.4 -8.4 3.2 1995 -9.6 -8.6 -3.6 1.9 7.4 9.8 13.8 13.9 9.5 3.4 0.1 -11.2 2.2 1996 -12.7 -6.3 -4.1 1.6 7.4 10.9 13.6 13.3 9.6 4.3 -0.5 -6.5 2.5 1997 -10.8 -10.6 -4.8 -0.3 6.7 10.5 14.3 13.9 8.8 5.4 -0.4 -8.6 2.0 1998 -12.0 -8.4 -4.1 3.6 8.0 11.4 14.3 14.2 10.2 4.5 -0.4 -0.3 3.4 1999 -9.5 -7.8 -3.9 4.0 7.5 11.3 14.2 14.2 9.0 4.3 0.6 -5.5 3.2 2000 -10.6 -11.9 -4.9 4.9 7.4 9.7 13.4 13.6 9.0 4.6 -0.7 -7.5 2.3 2001 -13.9 -10.6 -3.2 4.0 8.2 10.5 14.1 13.0 8.9 6.9 -0.6 -4.4 2.7 2002 -9.5 -6.6 -1.7 3.2 8.0 11.7 13.3 12.7 10.1 5.3 -0.9 -5.9 3.3 2003 -9.3 -5.4 -2.5 4.2 6.3 10.9 14.3 13.7 9.6 6.5 -0.5 -2.6 3.8 2004 -7.1 -7.0 -0.3 2.3 7.5 10.5 13.0 13.3 9.7 4.4 1.0 -9.8 3.1 2005 -13.4 -9.2 -2.4 4.1 6.2 10.0 14.7 14.0 9.1 5.2 -0.4 -4.4 2.8 MEAN -11.1 -8.8 -3.7 2.5 7.3 10.7 14.1 13.7 9.4 4.9 -0.1 -6.0 2.7 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 3 LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M AVERAGE OF MAXIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 1.5 4.9 5.3 11.4 21.8 27.3 28.5 28.7 25.7 15.5 13.0 5.5 15.8 1988 1.2 2.1 6.1 12.0 20.7 25.8 30.2 28.8 26.5 20.6 10.6 6.0 15.9 1989 -2.3 -0.1 5.7 12.5 19.8 27.7 30.2 29.9 25.6 20.7 10.3 3.5 15.3 1990 -0.3 2.4 6.5 12.8 22.2 28.0 29.8 31.1 27.7 19.0 14.9 7.3 16.8 1991 1.6 2.5 6.2 15.1 20.2 27.0 31.8 31.5 26.7 17.2 12.8 3.2 16.3 1992 -2.3 0.8 2.0 9.1 16.3 24.2 30.0 28.3 23.6 19.4 10.7 2.1 13.7 1993 -0.8 1.6 4.5 9.3 17.4 25.8 28.7 28.5 26.3 17.8 10.8 9.3 14.9 1994 3.9 3.2 7.1 15.8 19.7 26.2 31.4 31.4 23.7 17.1 10.2 2.9 16.0 1995 3.8 4.0 7.0 12.5 19.3 24.7 31.0 30.8 25.1 18.8 13.5 2.1 16.0 1996 -0.9 4.6 5.4 10.7 20.6 26.4 27.8 29.0 26.5 18.9 12.1 7.0 15.7 1997 1.2 1.9 4.2 9.9 18.8 25.5 31.1 31.4 25.0 18.8 8.8 3.6 15.0 1998 -0.3 3.0 6.1 14.2 20.1 27.0 29.7 29.9 26.1 20.3 16.4 12.5 17.1 1999 2.1 5.1 6.4 14.3 22.7 27.3 29.5 29.6 26.5 20.1 11.5 7.2 16.9 2000 1.1 2.5 6.3 17.2 22.4 27.7 29.8 30.0 25.9 17.5 9.6 3.2 16.1 2001 0.9 3.8 9.7 17.4 21.0 27.2 29.8 30.0 25.3 19.7 11.1 5.8 16.8 2002 1.9 5.5 9.1 12.4 20.2 26.0 29.1 29.8 27.8 21.1 10.1 3.9 16.4 2003 3.0 4.4 7.4 14.9 19.7 26.4 31.3 30.5 26.2 20.3 12.7 6.1 16.9 2004 2.9 4.4 9.5 12.3 19.4 26.5 28.7 30.4 26.2 20.2 11.3 1.9 16.2 2005 0.3 1.3 8.0 16.0 19.2 26.6 30.8 29.9 26.5 20.1 11.6 8.3 16.6 MEAN 1.0 3.1 6.5 13.2 20.1 26.5 30.0 30.0 26.0 19.1 11.7 5.3 16.0 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 4 LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 13.1 11.7 9.3 11.0 12.4 15.8 15.3 16.3 16.0 10.1 12.7 10.9 12.9 1988 11.2 11.6 9.0 9.2 12.8 14.7 15.5 15.0 17.1 14.5 10.8 9.6 12.6 1989 13.0 13.3 9.9 11.3 13.3 17.4 16.1 15.7 16.1 16.0 9.9 12.5 13.7 1990 12.0 11.4 10.4 10.2 14.1 16.7 15.0 16.5 17.7 14.3 15.0 11.8 13.8 1991 10.6 11.4 9.3 11.5 13.6 15.9 17.8 17.9 16.9 12.6 13.1 10.7 13.4 1992 12.4 11.5 11.9 10.4 10.4 13.8 15.5 15.2 14.7 17.1 10.5 8.7 12.7 1993 11.8 10.0 9.0 8.3 11.1 15.6 14.7 14.6 16.1 13.6 10.1 11.5 12.2 1994 11.5 10.9 9.7 12.3 12.7 15.6 16.4 16.6 15.4 11.4 9.8 11.3 12.8 1995 13.4 12.6 10.6 10.6 11.9 14.9 17.2 16.9 15.6 15.4 13.4 13.3 13.8 1996 11.8 10.9 9.5 9.1 13.2 15.5 14.2 15.7 16.9 14.6 12.6 13.5 13.2 1997 12.0 12.5 9.0 10.2 12.1 15.0 16.8 17.5 16.2 13.4 9.2 12.2 13.0 1998 11.7 11.4 10.2 10.6 12.1 15.6 15.4 15.7 15.9 15.8 16.8 12.8 13.7 1999 11.6 12.9 10.3 10.3 15.2 16.0 15.3 15.4 17.5 15.8 10.9 12.7 13.7 2000 11.7 14.4 11.2 12.3 15.0 18.0 16.4 16.4 16.9 12.9 10.3 10.7 13.8 2001 14.8 14.4 12.9 13.4 12.8 16.7 15.7 17.0 16.4 12.8 11.7 10.2 14.1 2002 11.4 12.1 10.8 9.2 12.2 14.3 15.8 17.1 17.7 15.8 11.0 9.8 13.1 2003 12.3 9.8 9.9 10.7 13.4 15.5 17.0 16.8 16.6 13.8 13.2 8.7 13.1 2004 10.0 11.4 9.8 10.0 11.9 16.0 15.7 17.1 16.5 15.8 10.3 11.7 13.1 2005 13.7 10.5 10.4 11.9 13.0 16.6 16.1 15.9 17.4 14.9 12.0 12.7 13.8 MEAN 12.1 11.9 10.2 10.7 12.8 15.8 15.9 16.3 16.6 14.2 11.8 11.3 13.3 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 5 LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M AVERAGE OF MEAN DAILY TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 -5.0 -0.9 0.6 5.9 15.6 19.4 20.9 20.6 17.7 10.5 6.7 0.1 9.3 1988 -4.4 -3.7 1.6 7.4 14.3 18.5 22.5 21.3 17.9 13.3 5.2 1.2 9.6 1989 -8.8 -6.8 0.7 6.8 13.2 19.0 22.2 22.0 17.6 12.7 5.4 -2.8 8.4 1990 -6.3 -3.3 1.3 7.7 15.1 19.7 22.3 22.9 18.9 11.8 7.4 1.4 9.9 1991 -3.7 -3.2 1.5 9.4 13.4 19.0 22.9 22.6 18.3 10.9 6.3 -2.1 9.6 1992 -8.5 -4.9 -3.9 3.9 11.1 17.3 22.3 20.7 16.2 10.9 5.4 -2.3 7.4 1993 -6.7 -3.4 0.0 5.1 11.9 18.0 21.3 21.2 18.2 11.0 5.8 3.6 8.8 1994 -1.8 -2.2 2.2 9.7 13.3 18.4 23.2 23.1 16.0 11.4 5.3 -2.7 9.6 1995 -2.9 -2.3 1.7 7.2 13.3 17.2 22.4 22.3 17.3 11.1 6.8 -4.6 9.1 1996 -6.8 -0.8 0.6 6.2 14.0 18.7 20.7 21.2 18.1 11.6 5.8 0.2 9.1 1997 -4.8 -4.4 -0.3 4.8 12.8 18.0 22.7 22.6 16.9 12.1 4.2 -2.5 8.5 1998 -6.1 -2.7 1.0 8.9 14.1 19.2 22.0 22.1 18.1 12.4 8.0 6.1 10.3 1999 -3.7 -1.4 1.3 9.1 15.1 19.3 21.9 21.9 17.8 12.2 6.0 0.8 10.0 2000 -4.7 -4.7 0.7 11.0 14.9 18.7 21.6 21.8 17.5 11.0 4.5 -2.1 9.2 2001 -6.5 -3.4 3.3 10.7 14.6 18.9 21.9 21.5 17.1 13.3 5.2 0.7 9.8 2002 -3.8 -0.5 3.7 7.8 14.1 18.9 21.2 21.2 19.0 13.2 4.6 -1.0 9.9 2003 -3.1 -0.5 2.5 9.6 13.0 18.6 22.8 22.1 17.9 13.4 6.1 1.8 10.3 2004 -2.1 -1.3 4.6 7.3 13.5 18.5 20.9 21.9 18.0 12.3 6.2 -4.0 9.6 2005 -6.5 -3.9 2.8 10.0 12.7 18.3 22.8 22.0 17.8 12.7 5.6 2.0 9.7 MEAN -5.1 -2.9 1.4 7.8 13.7 18.6 22.0 21.8 17.7 12.0 5.8 -0.3 9.4 SD 1.99 1.70 1.80 2.05 1.15 0.65 0.74 0.70 0.76 0.96 0.96 2.72 1.35 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 6 LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M TEMPERATURE RECORDS LOWEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 -19.8 -20.0 -15.6 -9.0 5.4 8.2 10.6 6.8 3.6 -1.0 -6.2 -14.6 -20.0 DAY 9 12 22 1 7 10 3 30 29 28 30 22 1988 -21.6 -20.6 -12.5 -5.0 1.6 6.2 9.0 10.4 6.2 2.6 -6.8 -20.6 -21.6 DAY 20 7 16 2 8 26 1 5 1 11 25 29 1989 -27.0 -26.6 -17.0 -10.5 2.0 6.2 10.4 10.4 4.4 -0.4 -4.5 -18.0 -27.0 DAY 31 7 31 2 1 13 8 19 30 24 5 17 1990 -26.8 -22.6 -12.6 -5.0 3.0 7.0 10.2 12.2 7.4 -2.6 -4.6 -24.6 -26.8 DAY 26 13 21 6 15 18 5 24 3 31 14 28 1991 -22.0 -18.0 -13.6 -1.0 0.4 5.4 11.0 11.4 5.6 1.0 -6.4 -22.2 -22.2 DAY 16 10 16 14 5 1 16 29 28 30 27 29 1992 -30.6 -25.0 -21.6 -11.6 1.0 6.2 11.0 8.6 4.6 -1.8 -11.6 -18.6 -30.6 DAY 29 12 1 2 14 21 12 31 30 29 27 24 1993 -25.0 -21.6 -14.6 -5.2 0.0 5.0 10.7 11.6 5.0 1.4 -9.4 -8.6 -25.0 DAY 16 10 24 5 1 5 14 12 30 9 30 17 1994 -22.6 -16.6 -9.4 -1.8 0.4 5.4 9.4 11.6 2.4 1.8 -8.0 -21.4 -22.6 DAY 28 25 18 3 7 30 1 26 23 13 19 8 1995 -15.0 -21.4 -13.4 -2.4 0.6 5.6 7.4 12.0 4.2 -0.2 -8.8 -20.6 -21.4 DAY 15 26 1 13 10 1 2 30 22 23 27 14 1996 -29.4 -16.8 -10.6 -4.6 4.4 5.4 11.0 10.8 6.2 -1.2 -5.6 -15.4 -29.4 DAY 16 24 6 4 12 7 7 25 21 17 13 24 1997 -26.4 -22.6 -11.8 -11.4 -1.4 5.8 9.8 10.6 5.4 0.0 -4.6 -20.0 -26.4 DAY 20 8 31 12 6 4 7 30 15 27 29 22 1998 -25.0 -21.0 -16.2 -2.6 1.2 8.0 11.2 12.0 6.4 0.2 -3.4 -6.4 -25.0 DAY 22 18 6 25 2 1 26 1 6 30 27 6 1999 -24.6 -17.2 -10.8 -1.4 3.4 5.2 11.8 12.4 4.4 0.0 -9.6 -15.8 -24.6 DAY 27 7 16 12 12 7 29 29 25 22 30 6 2000 -21.0 -27.4 -15.4 -2.2 1.6 6.4 10.8 9.4 6.6 0.4 -5.6 -22.0 -27.4 DAY 14 10 4 1 13 10 21 31 4 19 27 17 2001 -28.4 -17.8 -9.4 -2.6 3.2 6.2 10.6 10.0 5.2 2.4 -10.2 -17.4 -28.4 DAY 29 23 13 14 1 19 31 1 24 16 20 18 2002 -22.2 -16.8 -8.6 -1.8 2.6 6.4 9.4 9.2 7.4 1.0 -13.0 -20.0 -22.2 DAY 25 22 2 4 6 8 1 29 20 24 27 23 2003 -20.6 -16.8 -13.6 -2.4 -0.8 7.0 8.6 11.6 5.8 2.6 -7.0 -10.8 -20.6 DAY 18 18 2 2 1 7 2 25 14 24 24 13 2004 -23.0 -18.2 -8.8 -3.0 2.2 5.6 10.2 10.0 5.2 -0.2 -7.2 -25.6 -25.6 DAY 21 4 17 18 6 5 21 14 28 25 29 29 2005 -23.0 -20.8 -10.0 -2.0 0.6 5.8 10.6 9.2 3.8 -2.2 -4.4 -19.6 -23.0 DAY 15 15 6 8 7 1 1 31 28 25 12 28 1987-2005 -30.6 -27.4 -21.6 -11.6 -1.4 5.0 7.4 6.8 2.4 -2.6 -13.0 -25.6 -30.6 YEAR-DAY 92-29 0-10 92- 1 92- 2 97- 6 93- 5 95- 2 87-30 94-23 90-31 2-27 4-29 92 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 7 LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M