STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.2 -0.6 7.3 12.0 18.6 22.5 26.0 24.3 20.8 15.3 7.7 4.1 13.2 MINIMUN AIR TEMPERATURE (C) -5.5 -7.4 0.1 3.6 7.1 8.3 12.8 11.2 6.2 3.2 -1.4 -3.0 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 17 20 7 3 0 0 0 0 0 0 10 13 70 DAYS WITH FREEZING MIN.<= 0 29 26 15 6 0 0 0 0 0 2 18 21 117 TEMPERATURE RECORDS LOWEST(C) -18.0 -22.6 -8.0 -7.0 1.0 3.6 8.4 7.6 3.0 -1.4 -9.6 -14.4 -22.6 DAY 20 6 17 3 8 26 2 12 1 12 24 29 MAXIMUM AIR TEMPERATURE (C) 5.2 4.6 12.1 17.0 24.1 28.5 32.3 30.3 27.8 21.9 13.6 9.2 18.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 6 26 24 6 0 0 0 62 DAYS WITH MAXIMUM TEMP. <= 0 3 4 0 0 0 0 0 0 0 0 0 2 9 TEMPERATURE RECORDS HIGHEST(C) 12.6 10.6 18.0 21.6 29.0 31.4 35.6 33.4 32.2 24.2 19.6 15.6 35.6 DAY 5 29 30 20 27 13 23 20 11 7 3 5 DIF. BETWEEN (MAX.-MIN.) (C) 10.7 12.0 12.0 13.4 17.0 20.2 19.5 19.1 21.6 18.7 15.0 12.2 16.0 MEAN DAILY TEMP. (MDT) (C) -0.1 -1.4 6.1 10.3 15.6 18.4 22.5 20.8 17.0 12.5 6.1 3.1 10.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.2 57.3 13.4 0.0 0.0 0.0 0.0 70.9 HEATING DEG. DAYS(BASE 18 0C) 562.5 562.3 370.1 231.6 77.3 8.2 0.0 0.0 41.3 169.3 356.2 463.0 2841.8 DEWPOINT (MEAN C) -5.9 -6.3 -3.3 -0.0 2.6 -5.4 2.8 0.2 -4.5 -4.4 -5.1 -7.1 -3.0 MIXING RATIO (G/KG) 3.38 3.31 4.18 5.24 6.15 3.46 6.29 5.21 3.71 3.75 3.52 3.05 4.27 VAPOUR PRESSURE (HPA) 4.19 4.10 5.16 6.49 7.63 4.29 7.74 6.44 4.61 4.68 4.39 3.80 5.29 SATURATION DEF. (HPA) 2.35 2.33 5.58 8.24 14.96 24.53 28.04 25.73 21.95 13.86 6.89 4.86 13.28 RELATIVE HUMIDITY (MEAN %) 68 70 53 49 38 18 25 23 21 29 44 47 40 RELATIVE HUMIDITY (MAX. %) 84 86 75 70 59 39 47 42 38 47 66 66 60 RELATIVE HUMIDITY (MIN. %) 51 55 37 34 26 9 15 14 12 18 28 33 28 RELATIVE HUMIDITY (MEAN% 03UTC) 80 84 71 69 58 39 46 42 38 47 64 62 58 RELATIVE HUMIDITY (MEAN% 09UTC) 61 64 45 38 31 12 18 17 14 21 35 38 33 RELATIVE HUMIDITY (MEAN% 15UTC) 65 68 49 44 31 13 19 17 16 26 42 46 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 23.5 44.9 46.6 23.2 0.2 0.6 0.3 0.0 0.0 1.0 35.1 25.7 201.1 DAYS WITH PRECIPITATION >=10 1 2 1 0 0 0 0 0 0 0 2 0 6 DAYS WITH PRECIPITATION >= 5 1 3 2 2 0 0 0 0 0 0 2 3 13 DAYS WITH PRECIPITATION >= 1 4 5 6 4 0 0 0 0 0 1 5 5 30 DAYS WITH PRECIPITATION 7 6 7 7 2 1 1 0 0 1 6 5 43 GREATEST DAILY PRECIPITATION 15.0 21.0 31.0 8.0 0.2 0.6 0.3 0.0 0.0 1.0 15.0 9.0 31.0 DAY 18 3 9 27 5 7 28 ** ** 15 14 26 DAY WITH THUNDER STORM 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 6 3 0 0 0 0 0 0 0 0 1 2 12 DAYS WITH DUST 0 0 0 0 0 2 0 1 0 2 0 1 6 WIND DIRECTION (PREVAILING) 225 225 270 270 270 270 270 270 225 270 225 225 270 PREVAILING WIND SPEED(KNOTS) 7.0 8.4 8.7 8.8 8.9 6.4 6.5 9.8 8.3 9.4 9.3 10.2 8.5 PREVAILING WIND PERCENT 12.9 10.3 25.8 19.3 33.5 21.3 12.3 18.7 13.3 22.6 14.0 20.0 17.9 CALMS PERCENT OF WIND 63.2 72.4 40.6 42.0 39.4 52.7 53.5 29.0 43.3 48.4 58.0 51.6 49.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 234 213 239 233 247 245 196 204 231 263 232 232 235 VECTOR WIND MAGNITUDE(KNOTS) 1.8 1.6 4.9 3.1 4.4 2.1 0.8 2.1 0.7 1.8 2.8 3.7 2.4 WIND STEADINESES (MEAN %) 69.2 72.7 83.1 68.9 83.0 60.0 23.5 33.9 15.6 43.9 77.8 80.4 57.1 WIND SPEED (MEAN KNOTS) 2.6 2.2 5.9 4.5 5.3 3.5 3.4 6.2 4.5 4.1 3.6 4.6 4.2 FASTEST WIND DIRECTION 270 150 250 270 210 260 220 270 150 270 260 250 270 FASTEST WIND SPEED (KNOTS) 23 16 21 19 21 16 16 21 19 23 23 17 23 DAY 29 1 5 1 2 1 19 30 7 21 20 13 DAYS WITH SKY CLEAR (0-2)/8 14 13 19 10 28 27 24 28 30 25 17 13 248 DAYS WITH P.CLOUDY (3-6)/8 11 12 8 16 3 3 7 3 0 6 11 15 95 DAYS WITH CLOUDY (7-8)/8 6 4 4 4 0 0 0 0 0 0 2 3 23 DAYS WITH VISIBILITY =< 2 KM 2 3 0 0 0 0 0 0 0 0 0 0 5 DURATION OF SUNSHINE HOURS 211.9 189.3 254.0 222.8 354.2 367.8 351.6 345.7 329.7 289.0 220.1 198.5 3334.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.1 775.4 774.7 777.7 778.9 776.5 774.4 776.0 779.3 781.8 780.9 777.7 777.5 MAX. QFE PRESSURE IN HPA 784.1 782.2 780.6 783.4 781.9 781.7 781.7 780.5 784.7 786.7 787.0 784.4 787.0 DAY-HOUR 3- 6 7- 6 17- 6 12- 9 17- 6 12- 6 31- 3 21- 6 15- 6 28- 6 6- 6 4- 6 MIN. QFE PRESSURE IN HPA 769.9 769.1 768.4 772.7 774.5 770.9 770.0 771.8 775.5 777.0 774.5 764.3 764.3 DAY-HOUR 19- 3 3-12 23-12 25-15 1- 3 30-12 18-12 24-12 17-12 30-12 30-12 27- 9 MEAN QNH PRESSURE IN HPA 1013.4 1012.6 1011.8 1015.4 1016.9 1014.0 1011.4 1013.4 1017.4 1020.5 1019.4 1015.5 1015.2 MAX. QNH PRESSURE IN HPA 1023.4 1021.1 1019.1 1022.5 1020.7 1020.4 1020.4 1018.9 1024.2 1026.6 1027.0 1023.8 1027.0 DAY-HOUR 3- 6 7- 6 17- 6 12- 9 17- 6 12- 6 31- 3 21- 6 15- 6 28- 6 6- 6 4- 6 MIN. QNH PRESSURE IN HPA 1005.8 1004.8 1003.9 1009.3 1011.5 1007.0 1005.9 1008.1 1012.7 1014.6 1011.5 998.8 998.8 DAY-HOUR 19- 3 3-12 23-12 25-15 1- 3 30-12 18-12 24-12 17-12 30-12 30-12 27- 9 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 775.9 775.3 774.7 777.5 779.0 777.0 775.1 776.7 779.9 782.2 781.1 777.8 777.7 MAX. QFE PRESSURE IN HPA 782.9 781.1 779.9 781.4 781.8 781.3 781.7 779.7 784.2 785.8 786.0 783.5 786.0 DAY 3 7 17 9 17 13 31 21 15 28 6 4 MIN. QFE PRESSURE IN HPA 769.9 769.6 768.8 773.2 774.5 771.7 771.5 774.0 777.4 778.5 775.2 765.0 765.0 DAY 19 17 5 25 1 30 18 3 4 31 29 27 MEAN QNH PRESSURE IN HPA 1013.3 1012.5 1011.7 1015.3 1017.0 1014.6 1012.3 1014.2 1018.2 1021.0 1019.7 1015.6 1015.4 MAX. QNH PRESSURE IN HPA 1021.9 1019.7 1018.2 1020.1 1020.6 1019.9 1020.4 1018.0 1023.5 1025.5 1025.8 1022.7 1025.8 DAY 3 7 17 9 17 13 31 21 15 28 6 4 MIN. QNH PRESSURE IN HPA 1005.8 1005.4 1004.4 1009.9 1011.5 1008.0 1007.8 1010.9 1015.1 1016.5 1012.4 999.7 999.7 DAY 19 17 5 25 1 30 18 3 4 31 29 27 MEAN QFF PRESSURE IN HPA 1015.6 1015.6 1007.2 1006.9 1003.4 998.1 992.6 996.5 1004.5 1011.7 1016.2 1014.6 1006.9 MAX. QFF PRESSURE IN HPA 1028.8 1037.2 1019.4 1018.3 1009.4 1003.8 1002.6 1001.7 1009.4 1018.0 1023.7 1029.2 1037.2 DAY 11 7 15 3 8 7 31 12 25 28 26 30 MIN. QFF PRESSURE IN HPA 1002.9 1002.5 998.8 999.7 998.0 990.9 987.9 989.6 998.6 1004.8 1006.6 997.2 987.9 DAY 7 17 23 25 1 30 16 3 12 21 29 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.8 776.4 775.5 778.5 779.6 777.3 775.3 777.0 780.4 782.9 782.1 778.8 778.4 MAX. QFE PRESSURE IN HPA 784.1 782.2 780.6 782.8 781.9 781.7 781.7 780.5 784.7 786.7 787.0 784.4 787.0 DAY 3 7 17 9 17 12 31 21 15 28 6 4 MIN. QFE PRESSURE IN HPA 770.9 771.0 769.3 773.9 776.4 771.8 771.6 774.3 777.8 779.3 776.4 765.2 765.2 DAY 19 17 5 25 1 30 18 24 1 31 29 27 MEAN QNH PRESSURE IN HPA 1014.4 1013.8 1012.8 1016.4 1017.8 1015.0 1012.5 1014.6 1018.9 1021.9 1021.0 1016.8 1016.3 MAX. QNH PRESSURE IN HPA 1023.4 1021.1 1019.1 1021.8 1020.7 1020.4 1020.4 1018.9 1024.2 1026.6 1027.0 1023.8 1027.0 DAY 3 7 17 9 17 12 31 21 15 28 6 4 MIN. QNH PRESSURE IN HPA 1007.0 1007.1 1005.0 1010.8 1013.9 1008.1 1007.9 1011.2 1015.6 1017.5 1013.9 999.9 999.9 DAY 19 17 5 25 1 30 18 24 1 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 776.3 775.8 775.1 778.1 779.2 776.7 774.6 776.2 779.5 781.8 781.0 777.7 777.6 MAX. QFE PRESSURE IN HPA 783.3 781.6 779.8 783.4 781.4 781.3 780.6 779.6 783.4 785.5 786.7 783.3 786.7 DAY 10 7 17 12 17 12 31 21 15 28 3 5 MIN. QFE PRESSURE IN HPA 770.9 770.2 769.8 773.3 776.6 771.2 771.0 773.1 776.8 777.7 775.7 764.3 764.3 DAY 19 3 5 25 19 30 18 24 17 30 29 27 MEAN QNH PRESSURE IN HPA 1013.7 1013.0 1012.2 1015.9 1017.3 1014.2 1011.6 1013.6 1017.6 1020.6 1019.5 1015.5 1015.4 MAX. QNH PRESSURE IN HPA 1022.4 1020.3 1018.1 1022.5 1020.1 1019.9 1019.1 1017.8 1022.5 1025.1 1026.6 1022.4 1026.6 DAY 10 7 17 12 17 12 31 21 15 28 3 5 MIN. QNH PRESSURE IN HPA 1007.0 1006.2 1005.7 1010.0 1014.1 1007.4 1007.1 1009.8 1014.4 1015.5 1013.0 998.8 998.8 DAY 19 3 5 25 19 30 18 24 17 30 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 775.4 774.6 774.0 777.1 778.3 775.8 773.6 775.1 778.3 780.8 780.0 776.9 776.7 MAX. QFE PRESSURE IN HPA 782.0 780.2 778.1 781.9 781.7 780.0 779.4 778.0 782.1 784.2 784.6 782.0 784.6 DAY 10 7 17 12 4 12 31 21 15 28 5 5 MIN. QFE PRESSURE IN HPA 770.8 769.1 768.4 772.9 775.8 770.9 770.0 771.8 775.5 777.0 774.5 764.7 764.7 DAY 26 3 23 25 19 30 18 24 17 30 30 27 MEAN QNH PRESSURE IN HPA 1012.7 1011.7 1010.9 1014.8 1016.3 1013.1 1010.4 1012.3 1016.2 1019.3 1018.3 1014.5 1014.2 MAX. QNH PRESSURE IN HPA 1020.8 1018.6 1016.0 1020.7 1020.4 1018.3 1017.6 1015.8 1020.9 1023.5 1024.0 1020.8 1024.0 DAY 10 7 17 12 4 12 31 21 15 28 5 5 MIN. QNH PRESSURE IN HPA 1006.9 1004.8 1003.9 1009.5 1013.1 1007.0 1005.9 1008.1 1012.7 1014.6 1011.5 999.3 999.3 DAY 26 3 23 25 19 30 18 24 17 30 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 BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.0 775.1 774.4 777.3 778.4 775.8 773.6 775.1 778.4 781.2 780.4 777.6 776.9 MAX. QFE PRESSURE IN HPA 782.5 780.1 778.2 782.0 781.8 779.5 779.2 777.7 782.2 784.9 785.4 782.4 785.4 DAY 3 7 17 12 3 12 30 21 14 28 5 5 MIN. QFE PRESSURE IN HPA 771.0 770.5 768.7 772.7 776.0 770.9 770.2 771.9 775.7 777.2 774.8 766.6 766.6 DAY 26 17 23 25 23 30 18 2 17 7 30 27 MEAN QNH PRESSURE IN HPA 1013.3 1012.2 1011.4 1014.9 1016.3 1013.1 1010.3 1012.2 1016.3 1019.8 1018.8 1015.3 1014.5 MAX. QNH PRESSURE IN HPA 1021.4 1018.4 1016.1 1020.8 1020.6 1017.7 1017.3 1015.5 1021.1 1024.4 1025.0 1021.3 1025.0 DAY 3 7 17 12 3 12 30 21 14 28 5 5 MIN. QNH PRESSURE IN HPA 1007.1 1006.5 1004.3 1009.3 1013.4 1007.0 1006.2 1008.3 1013.0 1014.8 1011.9 1001.7 1001.7 DAY 26 17 23 25 23 30 18 2 17 7 30 27 MEAN QFF PRESSURE IN HPA 1015.5 1015.2 1006.8 1006.4 1002.5 996.7 990.6 994.5 1002.5 1010.5 1015.4 1014.3 1005.9 MAX. QFF PRESSURE IN HPA 1028.8 1036.4 1015.3 1016.7 1008.3 1001.2 998.9 999.0 1006.3 1016.4 1021.8 1029.4 1036.4 DAY 20 7 17 3 8 7 31 12 25 28 25 29 MIN. QFF PRESSURE IN HPA 1005.3 1003.4 1000.3 998.8 997.7 990.7 985.8 988.3 996.3 1004.7 1006.3 1000.4 985.8 DAY 26 23 23 25 19 30 16 2 11 7 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 BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.6 -2.6 5.4 11.0 16.9 24.0 23.9 23.1 20.6 15.1 8.1 2.3 11.9 MINIMUN AIR TEMPERATURE (C) -11.2 -9.6 -1.4 1.5 5.6 9.4 12.2 11.4 7.5 2.2 0.3 -3.7 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 25 21 8 4 0 0 0 0 0 0 4 18 80 DAYS WITH FREEZING MIN.<= 0 31 26 21 10 1 0 0 0 0 3 17 23 132 TEMPERATURE RECORDS LOWEST(C) -20.0 -20.4 -9.6 -5.0 0.0 4.0 8.4 9.0 2.5 -2.0 -6.0 -11.5 -20.4 DAY 16 7 31 2 2 13 25 8 24 24 24 18 MAXIMUM AIR TEMPERATURE (C) 1.0 2.6 10.1 16.4 22.0 29.7 31.2 30.6 27.0 22.1 13.0 7.0 17.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 15 19 26 5 0 0 0 65 DAYS WITH MAXIMUM TEMP. <= 0 9 8 1 0 0 0 0 0 0 0 0 0 18 TEMPERATURE RECORDS HIGHEST(C) 6.6 10.4 14.8 22.4 29.4 34.0 35.0 32.2 31.2 27.0 16.4 11.0 35.0 DAY 2 28 7 16 30 27 3 28 2 9 5 1 DIF. BETWEEN (MAX.-MIN.) (C) 12.2 12.2 11.5 14.9 16.4 20.3 19.0 19.2 19.5 19.9 12.7 10.7 15.7 MEAN DAILY TEMP. (MDT) (C) -5.1 -3.5 4.3 9.0 13.8 19.6 21.7 21.0 17.3 12.2 6.7 1.7 9.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 5.9 42.2 12.4 0.1 0.0 0.0 0.0 60.6 HEATING DEG. DAYS(BASE 18 0C) 716.3 576.4 423.4 270.7 132.0 6.8 0.2 0.0 45.4 181.2 340.4 505.4 3198.1 DEWPOINT (MEAN C) -12.4 -11.1 -5.7 -3.2 -0.5 -0.7 3.9 1.9 1.9 -1.1 -2.5 -4.8 -2.9 MIXING RATIO (G/KG) 2.03 2.32 3.43 4.21 4.90 4.81 7.03 5.78 5.99 4.69 4.44 3.55 4.43 VAPOUR PRESSURE (HPA) 2.52 2.88 4.24 5.23 6.10 5.97 8.67 7.16 7.42 5.85 5.53 4.41 5.50 SATURATION DEF. (HPA) 2.13 2.58 5.24 8.69 14.64 25.70 25.78 25.47 18.74 12.74 5.66 3.08 12.54 RELATIVE HUMIDITY (MEAN %) 56 54 50 43 36 22 27 25 31 36 53 62 41 RELATIVE HUMIDITY (MAX. %) 68 68 70 72 68 41 42 40 44 50 70 80 59 RELATIVE HUMIDITY (MIN. %) 45 42 35 27 22 14 20 18 23 26 37 45 30 RELATIVE HUMIDITY (MEAN% 03UTC) 64 65 66 71 67 41 40 40 44 49 66 78 58 RELATIVE HUMIDITY (MEAN% 09UTC) 52 49 41 30 26 16 22 19 25 29 44 55 34 RELATIVE HUMIDITY (MEAN% 15UTC) 54 52 50 38 27 18 23 20 26 33 51 62 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 18.9 10.5 45.5 21.8 12.9 0.0 0.0 0.0 0.0 0.5 25.6 112.0 247.7 DAYS WITH PRECIPITATION >=10 0 0 1 1 1 0 0 0 0 0 0 2 5 DAYS WITH PRECIPITATION >= 5 2 1 5 2 1 0 0 0 0 0 3 3 17 DAYS WITH PRECIPITATION >= 1 3 4 11 4 2 0 0 0 0 0 6 7 37 DAYS WITH PRECIPITATION 10 7 11 8 4 0 0 0 0 1 8 7 56 GREATEST DAILY PRECIPITATION 8.0 5.0 10.0 10.1 11.0 0.0 0.0 0.0 0.0 0.5 6.2 72.0 72.0 DAY 3 19 19 29 8 ** ** ** ** 31 2 4 DAY WITH THUNDER STORM 0 0 0 4 0 0 0 0 0 0 0 1 5 DAYS WITH SNOW OR SLEET 8 4 4 0 0 0 0 0 0 0 0 3 19 DAYS WITH DUST 0 0 4 0 4 6 3 2 6 0 0 0 25 WIND DIRECTION (PREVAILING) 270 270 225 270 270 270 45 90 225 270 270 180 270 PREVAILING WIND SPEED(KNOTS) 8.1 6.3 9.7 6.8 9.8 11.4 12.0 9.0 10.8 7.7 11.3 13.8 9.4 PREVAILING WIND PERCENT 9.7 11.4 18.7 11.3 16.1 18.7 12.9 9.0 13.3 7.7 12.7 8.4 10.5 CALMS PERCENT OF WIND 72.3 65.7 47.7 60.0 69.0 65.3 63.2 72.3 61.3 67.1 64.0 79.4 65.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 223 234 222 316 271 255 49 52 246 201 236 204 238 VECTOR WIND MAGNITUDE(KNOTS) 1.4 1.3 3.4 0.2 2.2 2.8 1.8 1.1 1.7 0.4 2.4 2.1 1.1 WIND STEADINESES (MEAN %) 66.7 56.5 72.3 5.9 73.3 75.7 48.6 42.3 43.6 16.7 66.7 84.0 34.4 WIND SPEED (MEAN KNOTS) 2.1 2.3 4.7 3.4 3.0 3.7 3.7 2.6 3.9 2.4 3.6 2.5 3.2 FASTEST WIND DIRECTION 200 250 240 240 320 280 240 10 240 220 280 160 240 FASTEST WIND SPEED (KNOTS) 14 16 17 16 16 17 17 16 17 16 16 16 17 DAY 4 11 14 14 4 10 16 20 18 21 18 1 DAYS WITH SKY CLEAR (0-2)/8 21 19 12 12 22 30 30 25 29 26 16 21 263 DAYS WITH P.CLOUDY (3-6)/8 8 7 16 13 5 0 1 5 1 5 9 7 77 DAYS WITH CLOUDY (7-8)/8 2 2 3 5 4 0 0 1 0 0 5 3 25 DAYS WITH VISIBILITY =< 2 KM 1 0 2 0 0 0 0 0 0 0 0 1 4 DURATION OF SUNSHINE HOURS 245.7 229.2 219.9 227.2 306.2 379.7 365.3 312.0 316.6 290.8 200.0 221.5 3314.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 774.8 776.5 774.7 779.0 779.6 777.4 777.4 777.5 779.2 782.0 781.0 777.7 778.1 MAX. QFE PRESSURE IN HPA 780.3 781.7 781.0 783.7 782.5 781.4 781.6 781.5 786.0 787.4 785.8 782.2 787.4 DAY-HOUR 22- 6 8- 6 8- 6 9- 6 13- 9 4- 6 20- 6 26- 6 24- 6 27- 6 29- 6 1- 6 MIN. QFE PRESSURE IN HPA 768.2 766.5 766.7 775.4 776.7 774.4 773.3 771.6 774.6 777.8 777.0 773.5 766.5 DAY-HOUR 17- 3 14- 3 15-15 6-12 16-12 30-15 5-15 1-15 12-12 1-12 16-12 5- 9 MEAN QNH PRESSURE IN HPA 1011.8 1014.0 1011.7 1017.1 1017.8 1015.1 1015.1 1015.3 1017.3 1020.8 1019.6 1015.4 1015.9 MAX. QNH PRESSURE IN HPA 1018.7 1020.4 1019.6 1022.9 1021.4 1020.1 1020.3 1020.2 1025.8 1027.5 1025.5 1021.1 1027.5 DAY-HOUR 22- 6 8- 6 8- 6 9- 6 13- 9 4- 6 20- 6 26- 6 24- 6 27- 6 29- 6 1- 6 MIN. QNH PRESSURE IN HPA 1003.7 1001.6 1001.8 1012.6 1014.2 1011.4 1010.0 1007.9 1011.6 1015.6 1014.6 1010.3 1001.6 DAY-HOUR 17- 3 14- 3 15-15 6-12 16-12 30-15 5-15 1-15 12-12 1-12 16-12 5- 9 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 774.6 776.1 774.6 779.2 779.9 777.9 778.1 778.3 779.9 782.5 781.2 777.7 778.3 MAX. QFE PRESSURE IN HPA 778.8 780.9 780.2 783.0 781.8 781.0 781.3 781.0 785.2 786.4 785.2 781.5 786.4 DAY 19 8 8 10 24 4 20 8 24 27 29 19 MIN. QFE PRESSURE IN HPA 768.2 766.5 767.2 776.0 777.8 775.0 775.0 773.6 775.9 779.1 778.1 774.4 766.5 DAY 17 14 30 6 11 17 6 2 13 2 16 5 MEAN QNH PRESSURE IN HPA 1011.6 1013.5 1011.7 1017.3 1018.2 1015.7 1015.9 1016.2 1018.1 1021.4 1019.8 1015.5 1016.2 MAX. QNH PRESSURE IN HPA 1016.8 1019.4 1018.6 1022.0 1020.6 1019.6 1019.9 1019.6 1024.8 1026.3 1024.8 1020.2 1026.3 DAY 19 8 8 10 24 4 20 8 24 27 29 19 MIN. QNH PRESSURE IN HPA 1003.7 1001.6 1002.4 1013.4 1015.6 1012.1 1012.1 1010.4 1013.2 1017.2 1016.0 1011.4 1001.6 DAY 17 14 30 6 11 17 6 2 13 2 16 5 MEAN QFF PRESSURE IN HPA 1018.7 1019.1 1008.8 1010.6 1006.0 998.2 996.9 998.3 1004.1 1012.5 1015.2 1015.8 1008.7 MAX. QFF PRESSURE IN HPA 1031.0 1033.0 1021.1 1018.8 1011.1 1002.7 1001.4 1002.7 1015.3 1018.4 1023.0 1027.6 1033.0 DAY 19 8 31 2 2 13 29 8 24 27 26 19 MIN. QFF PRESSURE IN HPA 1004.7 1003.7 997.9 1004.8 999.3 992.6 991.1 991.0 996.5 1006.7 1007.0 1008.2 991.0 DAY 17 23 28 30 31 10 5 2 13 31 17 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 775.7 777.2 775.4 779.8 780.4 778.1 778.3 778.6 780.4 783.4 782.0 778.6 779.0 MAX. QFE PRESSURE IN HPA 780.3 781.7 781.0 783.7 782.2 781.4 781.6 781.5 786.0 787.4 785.8 782.2 787.4 DAY 22 8 8 9 13 4 20 26 24 27 29 1 MIN. QFE PRESSURE IN HPA 770.2 769.4 768.3 776.8 778.2 775.2 775.4 773.9 776.6 779.8 779.1 774.7 768.3 DAY 12 14 30 23 11 7 5 2 13 2 16 5 MEAN QNH PRESSURE IN HPA 1013.0 1014.8 1012.7 1018.1 1018.8 1016.0 1016.2 1016.6 1018.8 1022.5 1020.8 1016.6 1017.1 MAX. QNH PRESSURE IN HPA 1018.7 1020.4 1019.6 1022.9 1021.1 1020.1 1020.3 1020.2 1025.8 1027.5 1025.5 1021.1 1027.5 DAY 22 8 8 9 13 4 20 26 24 27 29 1 MIN. QNH PRESSURE IN HPA 1006.2 1005.2 1003.8 1014.4 1016.1 1012.4 1012.6 1010.8 1014.1 1018.1 1017.2 1011.7 1003.8 DAY 12 14 30 23 11 7 5 2 13 2 16 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 775.0 777.0 775.1 779.4 779.8 777.6 777.7 777.8 779.3 782.1 781.1 777.6 778.3 MAX. QFE PRESSURE IN HPA 779.2 781.1 780.6 782.9 782.5 780.3 781.0 781.0 784.9 785.9 784.5 781.4 785.9 DAY 22 8 8 10 13 4 20 26 24 27 28 1 MIN. QFE PRESSURE IN HPA 771.0 770.5 768.8 776.1 777.5 774.7 774.3 773.2 775.8 778.8 778.1 773.5 768.8 DAY 12 14 30 29 11 7 5 2 12 1 16 5 MEAN QNH PRESSURE IN HPA 1012.2 1014.6 1012.2 1017.5 1018.0 1015.4 1015.5 1015.6 1017.5 1020.9 1019.6 1015.4 1016.2 MAX. QNH PRESSURE IN HPA 1017.3 1019.7 1019.1 1021.9 1021.4 1018.7 1019.6 1019.6 1024.4 1025.6 1023.9 1020.1 1025.6 DAY 22 8 8 10 13 4 20 26 24 27 28 1 MIN. QNH PRESSURE IN HPA 1007.1 1006.5 1004.4 1013.5 1015.2 1011.7 1011.2 1009.9 1013.1 1016.8 1016.0 1010.3 1004.4 DAY 12 14 30 29 11 7 5 2 12 1 16 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 774.1 776.0 774.1 778.3 778.9 776.8 776.7 776.6 778.1 780.9 780.2 776.9 777.3 MAX. QFE PRESSURE IN HPA 777.8 780.2 778.9 781.9 782.5 779.2 779.8 779.7 783.2 784.2 783.8 780.9 784.2 DAY 19 20 7 9 13 3 20 8 24 27 28 1 MIN. QFE PRESSURE IN HPA 769.9 769.7 768.4 775.4 776.7 774.7 773.6 772.0 774.6 777.8 777.0 773.9 768.4 DAY 4 1 28 6 16 7 5 1 12 1 16 15 MEAN QNH PRESSURE IN HPA 1011.0 1013.4 1011.0 1016.3 1017.0 1014.3 1014.2 1014.1 1016.0 1019.4 1018.6 1014.5 1015.0 MAX. QNH PRESSURE IN HPA 1015.6 1018.6 1017.0 1020.7 1021.4 1017.3 1018.1 1018.0 1022.3 1023.5 1023.0 1019.4 1023.5 DAY 19 20 7 9 13 3 20 8 24 27 28 1 MIN. QNH PRESSURE IN HPA 1005.8 1005.5 1003.9 1012.6 1014.2 1011.7 1010.4 1008.4 1011.6 1015.6 1014.6 1010.8 1003.9 DAY 4 1 28 6 16 7 5 1 12 1 16 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 774.5 776.3 774.3 778.4 778.8 776.7 776.4 776.5 778.3 781.4 780.7 777.5 777.5 MAX. QFE PRESSURE IN HPA 778.6 780.6 779.4 781.5 781.4 779.5 779.5 779.9 783.3 784.7 784.3 781.7 784.7 DAY 18 25 7 9 13 3 20 7 23 27 28 18 MIN. QFE PRESSURE IN HPA 769.5 768.2 766.7 775.4 776.7 774.4 773.3 771.6 774.9 777.8 777.8 774.6 766.7 DAY 11 22 15 6 16 30 5 1 12 1 16 15 MEAN QNH PRESSURE IN HPA 1011.5 1013.8 1011.3 1016.4 1016.9 1014.2 1013.8 1014.0 1016.2 1020.0 1019.2 1015.3 1015.2 MAX. QNH PRESSURE IN HPA 1016.6 1019.1 1017.6 1020.2 1020.1 1017.7 1017.7 1018.2 1022.4 1024.2 1023.7 1020.4 1024.2 DAY 18 25 7 9 13 3 20 7 23 27 28 18 MIN. QNH PRESSURE IN HPA 1005.3 1003.7 1001.8 1012.6 1014.2 1011.4 1010.0 1007.9 1012.0 1015.6 1015.6 1011.6 1001.8 DAY 11 22 15 6 16 30 5 1 12 1 16 15 MEAN QFF PRESSURE IN HPA 1018.6 1019.0 1008.4 1009.5 1004.5 996.5 994.5 995.9 1002.0 1010.9 1014.5 1015.6 1007.5 MAX. QFF PRESSURE IN HPA 1030.1 1033.0 1017.3 1015.8 1010.3 1000.6 999.8 1000.5 1012.6 1015.9 1020.8 1027.5 1033.0 DAY 15 7 31 1 13 3 28 7 23 24 26 18 MIN. QFF PRESSURE IN HPA 1005.6 999.7 995.4 1004.3 998.0 990.0 988.3 989.1 995.5 1005.4 1006.8 1008.3 988.3 DAY 2 22 15 29 31 30 5 1 13 1 16 12 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 BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.8 1.2 6.7 12.0 19.3 23.9 25.0 25.7 22.0 14.5 9.3 3.5 13.4 MINIMUN AIR TEMPERATURE (C) -9.4 -4.7 -1.4 3.2 6.8 9.2 12.9 12.3 7.0 1.8 -2.3 -4.9 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 16 13 2 0 0 0 0 0 0 12 14 83 DAYS WITH FREEZING MIN.<= 0 31 25 20 10 0 0 0 0 0 10 26 26 148 TEMPERATURE RECORDS LOWEST(C) -22.0 -13.0 -9.0 -4.0 2.0 3.6 9.0 9.4 3.0 -2.6 -7.4 -20.4 -22.0 DAY 31 1 21 6 27 2 19 25 20 31 30 28 MAXIMUM AIR TEMPERATURE (C) 1.9 5.3 11.6 16.8 24.4 29.8 30.6 32.0 28.7 20.7 16.2 9.3 18.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 17 21 29 13 0 0 0 80 DAYS WITH MAXIMUM TEMP. <= 0 10 0 0 0 0 0 0 0 0 0 0 3 13 TEMPERATURE RECORDS HIGHEST(C) 8.0 10.0 17.0 24.0 28.8 34.0 33.4 34.2 31.6 25.0 21.0 16.0 34.2 DAY 1 19 10 13 21 30 11 12 4 2 4 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.3 10.0 13.0 13.6 17.6 20.6 17.7 19.7 21.7 18.9 18.5 14.2 16.4 MEAN DAILY TEMP. (MDT) (C) -3.8 0.3 5.1 10.0 15.6 19.5 21.7 22.1 17.9 11.2 6.9 2.2 10.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 6.5 34.2 38.1 0.0 0.0 0.0 0.0 78.8 HEATING DEG. DAYS(BASE 18 0C) 674.9 478.8 399.7 239.9 76.3 8.3 0.0 0.0 27.9 209.4 332.3 490.3 2937.9 DEWPOINT (MEAN C) -8.4 -6.1 -4.5 -3.2 -1.4 -1.9 1.5 2.9 -3.7 -5.0 -7.3 -9.2 -3.8 MIXING RATIO (G/KG) 2.74 3.26 3.80 4.11 4.66 4.40 5.66 6.24 3.92 3.48 2.94 2.57 3.98 VAPOUR PRESSURE (HPA) 3.40 4.03 4.73 5.10 5.78 5.46 7.00 7.72 4.87 4.35 3.67 3.20 4.94 SATURATION DEF. (HPA) 1.86 2.93 5.61 9.86 17.75 25.93 26.11 27.18 23.58 13.33 9.05 5.57 14.06 RELATIVE HUMIDITY (MEAN %) 67 61 50 38 28 20 24 24 20 29 35 46 37 RELATIVE HUMIDITY (MAX. %) 78 78 70 56 51 40 42 37 35 49 59 66 55 RELATIVE HUMIDITY (MIN. %) 56 48 37 28 17 12 16 17 12 18 20 31 26 RELATIVE HUMIDITY (MEAN% 03UTC) 75 76 65 55 49 40 41 37 33 48 59 63 53 RELATIVE HUMIDITY (MEAN% 09UTC) 61 56 44 32 19 14 18 20 14 22 26 36 30 RELATIVE HUMIDITY (MEAN% 15UTC) 67 55 48 35 26 16 19 21 15 26 29 46 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.4 42.9 27.9 38.0 2.0 0.0 0.8 0.0 0.0 2.3 3.0 20.1 177.4 DAYS WITH PRECIPITATION >=10 2 1 1 1 0 0 0 0 0 0 0 1 6 DAYS WITH PRECIPITATION >= 5 4 2 2 1 0 0 0 0 0 0 0 1 10 DAYS WITH PRECIPITATION >= 1 5 5 3 4 2 0 0 0 0 1 1 4 25 DAYS WITH PRECIPITATION 7 6 8 4 2 0 1 0 0 2 1 7 38 GREATEST DAILY PRECIPITATION 12.0 27.0 18.0 32.0 1.0 0.0 0.8 0.0 0.0 2.0 3.0 12.5 32.0 DAY 5 5 14 3 12 ** 8 ** ** 29 28 21 DAY WITH THUNDER STORM 0 0 0 0 1 0 0 0 0 0 0 1 2 DAYS WITH SNOW OR SLEET 8 6 2 1 0 0 0 0 0 0 0 3 20 DAYS WITH DUST 0 0 4 1 7 3 6 0 0 6 1 0 28 WIND DIRECTION (PREVAILING) 225 225 225 225 270 225 45 90 45 270 225 270 225 PREVAILING WIND SPEED(KNOTS) 10.6 13.2 11.6 11.7 13.0 10.5 11.1 9.2 9.2 12.0 11.5 12.8 11.4 PREVAILING WIND PERCENT 20.6 16.4 16.1 22.0 18.1 8.7 8.4 12.3 6.7 15.5 7.3 20.0 10.7 CALMS PERCENT OF WIND 73.5 65.0 54.8 44.0 70.3 82.0 69.7 56.1 76.0 71.6 78.7 67.1 67.4 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 229 221 233 239 251 238 97 108 128 257 234 256 235 VECTOR WIND MAGNITUDE(KNOTS) 2.6 3.8 3.7 5.6 3.2 1.7 1.2 0.7 0.6 2.4 1.0 3.1 2.1 WIND STEADINESES (MEAN %) 96.3 84.4 68.5 84.8 84.2 85.0 36.4 20.6 24.0 72.7 43.5 77.5 56.8 WIND SPEED (MEAN KNOTS) 2.7 4.5 5.4 6.6 3.8 2.0 3.3 3.4 2.5 3.3 2.3 4.0 3.7 FASTEST WIND DIRECTION 240 200 180 240 280 210 120 50 250 270 270 280 240 FASTEST WIND SPEED (KNOTS) 16 17 17 21 19 16 17 14 14 16 16 16 21 DAY 10 20 6 16 5 15 7 29 1 4 12 11 DAYS WITH SKY CLEAR (0-2)/8 18 21 15 17 27 29 20 24 30 28 27 23 279 DAYS WITH P.CLOUDY (3-6)/8 10 4 13 11 4 1 11 7 0 3 3 5 72 DAYS WITH CLOUDY (7-8)/8 3 3 3 2 0 0 0 0 0 0 0 3 14 DAYS WITH VISIBILITY =< 2 KM 1 0 0 1 0 0 0 0 0 0 0 1 3 DURATION OF SUNSHINE HOURS 213.2 232.4 258.5 279.9 368.0 371.9 310.9 298.2 333.0 333.0 333.0 344.1 3676.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 775.9 774.0 778.2 777.0 778.7 777.3 776.0 777.0 779.1 781.9 781.7 778.8 778.0 MAX. QFE PRESSURE IN HPA 783.3 781.0 785.5 782.4 783.6 782.8 780.9 781.4 783.6 786.7 788.2 786.5 788.2 DAY-HOUR 26- 6 8- 6 10- 6 25- 6 18- 6 4- 6 15- 6 3- 6 26- 6 19- 6 23- 6 5- 6 MIN. QFE PRESSURE IN HPA 770.0 765.1 771.9 771.3 770.6 773.1 769.7 773.7 774.9 776.8 775.9 768.5 765.1 DAY-HOUR 28-12 15-15 19-12 6-12 12-15 27-12 5-12 8-15 4-12 1-12 1-12 25-12 MEAN QNH PRESSURE IN HPA 1013.3 1010.8 1016.0 1014.6 1016.7 1015.0 1013.3 1014.6 1017.1 1020.7 1020.5 1016.9 1015.8 MAX. QNH PRESSURE IN HPA 1022.4 1019.6 1025.1 1021.3 1022.8 1021.8 1019.4 1020.1 1022.8 1026.6 1028.5 1026.4 1028.5 DAY-HOUR 26- 6 8- 6 10- 6 25- 6 18- 6 4- 6 15- 6 3- 6 26- 6 19- 6 23- 6 5- 6 MIN. QNH PRESSURE IN HPA 1005.9 999.8 1008.3 1007.5 1006.6 1009.8 1005.5 1010.5 1012.0 1014.4 1013.2 1004.0 999.8 DAY-HOUR 28-12 15-15 19-12 6-12 12-15 27-12 5-12 8-15 4-12 1-12 1-12 25-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 775.8 774.0 778.3 777.2 779.2 777.9 776.7 777.9 779.7 782.4 782.1 779.0 778.3 MAX. QFE PRESSURE IN HPA 782.4 780.0 784.5 781.7 783.3 782.8 780.5 781.2 782.9 786.0 787.2 785.0 787.2 DAY 26 8 10 25 18 5 16 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 771.2 768.5 774.0 772.2 771.0 773.4 771.4 775.5 776.7 778.4 777.6 770.1 768.5 DAY 16 10 19 2 13 27 5 9 4 1 1 25 MEAN QNH PRESSURE IN HPA 1013.1 1010.9 1016.2 1014.8 1017.3 1015.7 1014.2 1015.7 1018.0 1021.3 1020.9 1017.1 1016.3 MAX. QNH PRESSURE IN HPA 1021.3 1018.3 1023.9 1020.4 1022.4 1021.8 1018.9 1019.8 1021.9 1025.8 1027.3 1024.5 1027.3 DAY 26 8 10 25 18 5 16 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1007.4 1004.0 1010.9 1008.6 1007.1 1010.1 1007.6 1012.7 1014.2 1016.3 1015.3 1006.0 1004.0 DAY 16 10 19 2 13 27 5 9 4 1 1 25 MEAN QFF PRESSURE IN HPA 1018.0 1011.8 1012.8 1006.6 1003.1 998.3 995.2 997.0 1003.1 1012.5 1017.2 1017.5 1007.8 MAX. QFF PRESSURE IN HPA 1033.0 1027.9 1023.6 1014.2 1007.2 1007.2 999.8 1001.0 1010.1 1021.3 1027.3 1038.8 1038.8 DAY 26 1 21 3 15 1 9 4 26 19 23 29 MIN. QFF PRESSURE IN HPA 1005.8 1000.7 1005.3 996.7 995.4 990.7 988.1 992.7 996.4 1002.8 1007.0 1003.7 988.1 DAY 23 20 24 16 12 27 5 10 10 1 12 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.9 774.9 779.0 777.8 779.5 778.2 776.9 778.2 780.3 783.1 783.0 780.0 779.0 MAX. QFE PRESSURE IN HPA 783.3 781.0 785.5 782.4 783.6 782.8 780.9 781.4 783.6 786.7 788.2 786.5 788.2 DAY 26 8 10 25 18 4 15 3 26 19 23 5 MIN. QFE PRESSURE IN HPA 772.1 768.5 773.4 772.4 771.9 773.9 771.4 775.7 777.0 778.4 778.0 771.2 768.5 DAY 17 10 19 16 13 27 5 9 4 14 1 25 MEAN QNH PRESSURE IN HPA 1014.5 1011.9 1017.1 1015.6 1017.7 1016.1 1014.5 1016.1 1018.7 1022.1 1022.0 1018.4 1017.1 MAX. QNH PRESSURE IN HPA 1022.4 1019.6 1025.1 1021.3 1022.8 1021.8 1019.4 1020.1 1022.8 1026.6 1028.5 1026.4 1028.5 DAY 26 8 10 25 18 4 15 3 26 19 23 5 MIN. QNH PRESSURE IN HPA 1008.5 1004.0 1010.1 1008.9 1008.3 1010.8 1007.6 1013.0 1014.6 1016.3 1015.8 1007.4 1004.0 DAY 17 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 776.1 774.2 778.5 777.1 778.9 777.5 776.1 777.1 779.3 781.9 781.8 778.7 778.1 MAX. QFE PRESSURE IN HPA 782.5 780.4 784.5 781.7 782.9 782.2 780.2 780.5 782.6 785.3 786.6 785.2 786.6 DAY 26 8 10 25 18 4 15 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 770.8 767.5 772.6 771.7 771.6 773.9 770.7 774.9 775.9 777.4 776.8 770.0 767.5 DAY 28 10 19 16 12 27 5 1 4 14 1 25 MEAN QNH PRESSURE IN HPA 1013.5 1011.1 1016.5 1014.7 1016.9 1015.2 1013.5 1014.8 1017.4 1020.7 1020.5 1016.7 1016.0 MAX. QNH PRESSURE IN HPA 1021.4 1018.8 1023.9 1020.4 1021.9 1021.1 1018.6 1018.9 1021.5 1024.9 1026.5 1024.8 1026.5 DAY 26 8 10 25 18 4 15 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1006.9 1002.8 1009.1 1008.0 1007.9 1010.8 1006.8 1012.0 1013.2 1015.1 1014.4 1005.9 1002.8 DAY 28 10 19 16 12 27 5 1 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 775.2 773.2 777.3 776.2 777.9 776.5 775.1 776.0 778.0 780.9 780.6 777.9 777.1 MAX. QFE PRESSURE IN HPA 782.0 778.8 783.1 780.0 781.5 781.3 779.3 779.6 781.2 784.3 785.6 783.9 785.6 DAY 26 8 9 27 18 4 15 4 26 15 23 5 MIN. QFE PRESSURE IN HPA 770.0 767.1 771.9 771.3 771.5 773.1 769.7 774.0 774.9 776.8 775.9 768.5 767.1 DAY 28 10 19 6 13 27 5 1 4 1 1 25 MEAN QNH PRESSURE IN HPA 1012.4 1009.9 1015.0 1013.6 1015.7 1013.9 1012.2 1013.3 1015.8 1019.4 1019.1 1015.7 1014.7 MAX. QNH PRESSURE IN HPA 1020.8 1016.8 1022.2 1018.3 1020.2 1019.9 1017.5 1017.8 1019.8 1023.7 1025.3 1023.2 1025.3 DAY 26 8 9 27 18 4 15 4 26 15 23 5 MIN. QNH PRESSURE IN HPA 1005.9 1002.3 1008.3 1007.5 1007.8 1009.8 1005.5 1010.9 1012.0 1014.4 1013.2 1004.0 1002.3 DAY 28 10 19 6 13 27 5 1 4 1 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 BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 775.7 773.6 777.7 776.6 778.0 776.5 775.0 776.0 778.1 781.5 781.3 778.5 777.4 MAX. QFE PRESSURE IN HPA 782.5 778.8 784.2 780.1 781.5 781.0 778.9 779.6 781.2 785.1 786.2 784.8 786.2 DAY 26 8 9 24 18 4 15 4 26 15 22 5 MIN. QFE PRESSURE IN HPA 770.7 765.1 772.4 772.2 770.6 773.3 769.7 773.7 774.9 777.8 776.2 768.6 765.1 DAY 17 15 19 9 12 25 5 8 4 1 1 25 MEAN QNH PRESSURE IN HPA 1013.0 1010.3 1015.5 1014.1 1015.9 1014.0 1012.1 1013.3 1015.9 1020.2 1019.9 1016.5 1015.1 MAX. QNH PRESSURE IN HPA 1021.4 1016.8 1023.5 1018.4 1020.2 1019.6 1017.0 1017.8 1019.8 1024.7 1026.0 1024.3 1026.0 DAY 26 8 9 24 18 4 15 4 26 15 22 5 MIN. QNH PRESSURE IN HPA 1006.8 999.8 1008.9 1008.6 1006.6 1010.0 1005.5 1010.5 1012.0 1015.6 1013.6 1004.2 999.8 DAY 17 15 19 9 12 25 5 8 4 1 1 25 MEAN QFF PRESSURE IN HPA 1018.0 1010.9 1011.9 1005.8 1001.4 996.4 993.1 994.3 1000.9 1011.4 1016.2 1016.9 1006.4 MAX. QFF PRESSURE IN HPA 1035.1 1021.5 1021.2 1012.4 1005.2 1004.6 998.4 998.9 1007.8 1019.5 1026.4 1040.2 1040.2 DAY 26 8 21 3 16 1 20 4 26 19 23 28 MIN. QFF PRESSURE IN HPA 1007.9 997.5 1004.3 996.8 993.5 990.3 986.1 990.4 995.0 1001.8 1007.5 1001.1 986.1 DAY 28 15 24 15 12 30 5 8 4 1 1 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.1 2.0 6.4 12.9 17.4 22.9 26.5 25.1 20.8 13.2 8.1 2.3 13.2 MINIMUN AIR TEMPERATURE (C) -5.0 -4.7 -0.7 2.6 5.2 9.0 12.0 10.5 6.6 3.5 -2.0 -2.6 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 19 15 7 2 0 0 0 0 0 0 13 11 67 DAYS WITH FREEZING MIN.<= 0 27 25 18 7 3 0 0 0 0 5 23 20 128 TEMPERATURE RECORDS LOWEST(C) -12.2 -13.0 -7.0 -4.0 -1.0 4.0 8.0 7.2 0.4 -2.4 -7.4 -10.4 -13.0 DAY 26 14 16 8 5 1 3 29 28 31 27 23 MAXIMUM AIR TEMPERATURE (C) 5.5 6.8 11.4 18.1 22.6 28.7 33.1 31.7 27.4 19.2 14.2 6.2 18.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 9 31 28 12 0 0 0 80 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 10.4 13.4 18.4 23.4 27.4 31.6 36.6 34.4 32.0 22.0 19.0 11.4 36.6 DAY 20 25 22 27 31 29 9 7 7 8 2 11 DIF. BETWEEN (MAX.-MIN.) (C) 10.5 11.5 12.1 15.5 17.4 19.7 21.1 21.2 20.8 15.7 16.2 8.8 15.9 MEAN DAILY TEMP. (MDT) (C) 0.3 1.1 5.3 10.4 13.9 18.9 22.6 21.1 17.0 11.3 6.1 1.8 10.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.5 49.4 21.4 0.0 0.0 0.0 0.0 72.3 HEATING DEG. DAYS(BASE 18 0C) 550.1 474.5 380.3 228.9 130.2 7.4 0.0 0.0 44.8 206.3 357.3 503.1 2882.8 DEWPOINT (MEAN C) -6.6 -8.3 -4.1 -4.5 -6.6 -3.3 -1.4 -2.8 -4.1 -1.3 -6.7 -5.3 -4.6 MIXING RATIO (G/KG) 3.16 2.89 3.91 3.77 3.24 4.12 4.61 4.13 3.76 4.71 3.09 3.56 3.75 VAPOUR PRESSURE (HPA) 3.93 3.59 4.84 4.69 4.03 5.11 5.71 5.12 4.69 5.88 3.85 4.42 4.65 SATURATION DEF. (HPA) 2.95 3.79 5.27 11.11 16.91 24.33 31.17 29.02 22.00 10.03 7.66 3.04 13.94 RELATIVE HUMIDITY (MEAN %) 59 51 52 35 22 20 19 18 22 43 38 61 37 RELATIVE HUMIDITY (MAX. %) 77 74 77 62 43 39 36 35 37 70 61 76 57 RELATIVE HUMIDITY (MIN. %) 45 35 35 20 12 12 10 10 14 26 22 46 24 RELATIVE HUMIDITY (MEAN% 03UTC) 72 71 74 60 42 39 36 35 37 67 58 68 55 RELATIVE HUMIDITY (MEAN% 09UTC) 52 41 40 26 15 14 12 12 16 30 27 53 28 RELATIVE HUMIDITY (MEAN% 15UTC) 61 49 48 29 17 17 13 13 19 41 36 65 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 59.2 30.1 88.3 4.7 1.0 0.5 0.0 0.0 0.0 28.1 2.0 123.7 337.6 DAYS WITH PRECIPITATION >=10 3 0 3 0 0 0 0 0 0 1 0 5 12 DAYS WITH PRECIPITATION >= 5 4 3 5 0 0 0 0 0 0 2 0 7 21 DAYS WITH PRECIPITATION >= 1 8 6 8 2 1 0 0 0 0 5 1 13 44 DAYS WITH PRECIPITATION 10 7 10 6 1 1 0 0 0 6 1 18 60 GREATEST DAILY PRECIPITATION 17.0 8.7 29.0 2.0 1.0 0.5 0.0 0.0 0.0 14.0 2.0 25.0 29.0 DAY 21 28 6 5 3 26 ** ** ** 3 16 14 DAY WITH THUNDER STORM 0 0 1 0 0 2 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 4 4 2 1 0 0 0 0 0 0 0 6 17 DAYS WITH DUST 0 0 2 1 4 1 1 2 4 0 1 0 16 WIND DIRECTION (PREVAILING) 225 270 270 270 270 270 270 90 90 270 270 180 270 PREVAILING WIND SPEED(KNOTS) 10.9 11.7 13.3 11.4 12.5 10.5 10.8 8.9 6.7 7.0 8.7 9.5 10.4 PREVAILING WIND PERCENT 12.3 13.6 16.8 18.7 26.5 15.3 8.4 11.6 16.7 26.5 20.7 28.4 15.6 CALMS PERCENT OF WIND 74.2 55.0 50.3 66.7 54.8 52.7 78.7 74.2 38.0 32.3 24.7 18.7 51.7 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 227 220 234 255 259 274 305 84 111 248 250 212 237 VECTOR WIND MAGNITUDE(KNOTS) 2.4 3.4 4.1 3.3 5.0 1.0 0.2 1.5 0.1 1.8 2.4 4.9 2.1 WIND STEADINESES (MEAN %) 85.7 68.0 66.1 89.2 89.3 21.7 9.1 60.0 1.9 40.9 45.3 67.1 45.7 WIND SPEED (MEAN KNOTS) 2.8 5.0 6.2 3.7 5.6 4.6 2.2 2.5 5.2 4.4 5.3 7.3 4.6 FASTEST WIND DIRECTION 180 200 270 260 270 80 280 70 250 270 260 190 270 FASTEST WIND SPEED (KNOTS) 17 16 29 16 17 17 17 16 17 17 19 23 29 DAY 2 3 19 4 10 18 14 27 19 19 5 12 DAYS WITH SKY CLEAR (0-2)/8 21 12 10 12 22 25 31 31 27 20 22 14 247 DAYS WITH P.CLOUDY (3-6)/8 5 9 13 15 9 5 0 0 3 7 7 11 84 DAYS WITH CLOUDY (7-8)/8 5 7 8 3 0 0 0 0 0 4 1 6 34 DAYS WITH VISIBILITY =< 2 KM 1 0 1 0 0 0 0 0 0 0 0 0 2 DURATION OF SUNSHINE HOURS 226.5 193.7 216.6 260.4 346.4 332.9 363.2 355.4 309.7 252.6 243.6 169.0 3270.0 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.6 776.1 775.5 778.7 776.9 777.0 775.4 776.9 780.5 782.0 781.0 776.8 777.8 MAX. QFE PRESSURE IN HPA 783.2 784.6 781.9 784.1 781.8 782.0 779.5 780.9 784.0 786.3 784.8 783.3 786.3 DAY-HOUR 12- 6 15- 6 29- 6 18- 6 9- 6 23- 3 1- 3 23- 6 17- 6 28- 6 2- 6 7- 6 MIN. QFE PRESSURE IN HPA 768.0 769.1 765.8 773.7 772.3 771.9 770.7 772.5 775.8 778.5 776.9 768.0 765.8 DAY-HOUR 26- 3 7-12 6-15 12- 9 23- 3 12-12 14-12 11-12 3-12 15- 9 6-12 22- 3 MEAN QNH PRESSURE IN HPA 1014.0 1013.5 1012.8 1016.8 1014.5 1014.6 1012.6 1014.5 1019.0 1020.8 1019.6 1014.3 1015.6 MAX. QNH PRESSURE IN HPA 1022.3 1024.0 1020.7 1023.4 1020.6 1020.8 1017.7 1019.4 1023.3 1026.1 1024.3 1022.4 1026.1 DAY-HOUR 12- 6 15- 6 29- 6 18- 6 9- 6 23- 3 1- 3 23- 6 17- 6 28- 6 2- 6 7- 6 MIN. QNH PRESSURE IN HPA 1003.4 1004.8 1000.7 1010.5 1008.8 1008.3 1006.8 1009.0 1013.1 1016.5 1014.5 1003.4 1000.7 DAY-HOUR 26- 3 7-12 6-15 12- 9 23- 3 12-12 14-12 11-12 3-12 15- 9 6-12 22- 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 776.6 776.1 775.7 779.1 777.3 777.6 776.3 777.8 781.2 782.4 781.4 776.8 778.2 MAX. QFE PRESSURE IN HPA 782.3 783.4 781.2 783.2 780.9 782.0 779.5 780.6 783.8 786.0 783.9 782.1 786.0 DAY 13 15 29 19 9 23 1 23 17 28 2 8 MIN. QFE PRESSURE IN HPA 768.0 769.2 768.0 774.2 772.3 772.1 771.9 774.5 778.0 779.2 778.2 768.0 768.0 DAY 26 8 7 12 23 12 14 12 4 15 6 22 MEAN QNH PRESSURE IN HPA 1014.1 1013.5 1012.9 1017.2 1015.0 1015.4 1013.7 1015.5 1019.9 1021.3 1020.0 1014.3 1016.1 MAX. QNH PRESSURE IN HPA 1021.2 1022.5 1019.8 1022.3 1019.4 1020.8 1017.7 1019.1 1023.0 1025.8 1023.2 1020.9 1025.8 DAY 13 15 29 19 9 23 1 23 17 28 2 8 MIN. QNH PRESSURE IN HPA 1003.4 1004.9 1003.4 1011.1 1008.8 1008.5 1008.3 1011.5 1015.8 1017.3 1016.1 1003.4 1003.4 DAY 26 8 7 12 23 12 14 12 4 15 6 22 MEAN QFF PRESSURE IN HPA 1015.7 1014.2 1009.2 1008.8 1002.4 998.6 994.2 997.6 1006.1 1013.1 1017.0 1013.9 1007.6 MAX. QFF PRESSURE IN HPA 1026.4 1028.4 1018.9 1015.8 1008.9 1005.4 999.0 1001.9 1013.7 1019.9 1023.0 1024.8 1028.4 DAY 12 16 17 19 25 24 5 23 28 28 27 24 MIN. QFF PRESSURE IN HPA 1003.8 1004.6 999.8 1001.4 997.0 989.6 987.2 990.4 999.2 1004.6 1005.8 1001.5 987.2 DAY 25 8 7 10 17 12 14 11 8 15 5 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 777.6 777.0 776.4 779.7 777.7 777.8 776.4 778.0 781.7 783.1 782.3 777.8 778.8 MAX. QFE PRESSURE IN HPA 783.2 784.6 781.9 784.1 781.8 782.0 779.5 780.9 784.0 786.3 784.8 783.3 786.3 DAY 12 15 29 18 9 23 1 23 17 28 2 7 MIN. QFE PRESSURE IN HPA 770.0 770.1 769.0 774.6 774.0 772.3 771.6 774.7 778.0 779.3 779.1 769.4 769.0 DAY 26 8 7 12 23 12 14 11 8 15 8 22 MEAN QNH PRESSURE IN HPA 1015.3 1014.7 1013.9 1018.0 1015.5 1015.6 1013.9 1015.9 1020.5 1022.2 1021.1 1015.6 1016.8 MAX. QNH PRESSURE IN HPA 1022.3 1024.0 1020.7 1023.4 1020.6 1020.8 1017.7 1019.4 1023.3 1026.1 1024.3 1022.4 1026.1 DAY 12 15 29 18 9 23 1 23 17 28 2 7 MIN. QNH PRESSURE IN HPA 1005.9 1006.0 1004.7 1011.6 1010.9 1008.8 1007.9 1011.7 1015.8 1017.5 1017.2 1005.2 1004.7 DAY 26 8 7 12 23 12 14 11 8 15 8 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 776.5 776.3 775.8 778.9 777.1 777.1 775.6 777.1 780.6 782.0 780.9 776.7 777.9 MAX. QFE PRESSURE IN HPA 781.7 784.0 781.1 783.5 780.8 781.0 778.6 780.3 782.4 784.9 783.6 782.3 784.9 DAY 12 15 29 18 9 23 2 23 17 20 2 8 MIN. QFE PRESSURE IN HPA 769.5 769.4 768.5 773.7 774.2 772.3 771.3 773.8 777.3 778.5 777.4 770.7 768.5 DAY 25 8 6 12 28 12 14 11 3 15 6 22 MEAN QNH PRESSURE IN HPA 1014.0 1013.7 1013.1 1017.0 1014.7 1014.8 1012.8 1014.7 1019.1 1020.8 1019.4 1014.3 1015.7 MAX. QNH PRESSURE IN HPA 1020.4 1023.3 1019.7 1022.7 1019.3 1019.6 1016.6 1018.7 1021.3 1024.4 1022.8 1021.2 1024.4 DAY 12 15 29 18 9 23 2 23 17 20 2 8 MIN. QNH PRESSURE IN HPA 1005.3 1005.2 1004.0 1010.5 1011.1 1008.8 1007.5 1010.6 1015.0 1016.5 1015.1 1006.8 1004.0 DAY 25 8 6 12 28 12 14 11 3 15 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 775.8 775.3 774.7 777.9 776.2 776.1 774.3 775.8 779.4 781.0 780.0 776.0 776.9 MAX. QFE PRESSURE IN HPA 781.3 783.3 779.5 782.4 779.3 780.6 778.0 779.3 781.2 784.0 782.7 782.0 784.0 DAY 12 15 18 19 8 23 2 31 30 20 14 8 MIN. QFE PRESSURE IN HPA 768.7 769.1 766.5 774.0 773.3 771.9 770.7 772.5 775.8 778.5 776.9 768.5 766.5 DAY 25 7 6 11 6 12 14 11 3 15 6 25 MEAN QNH PRESSURE IN HPA 1013.1 1012.5 1011.7 1015.7 1013.6 1013.5 1011.3 1013.1 1017.5 1019.6 1018.3 1013.3 1014.4 MAX. QNH PRESSURE IN HPA 1019.9 1022.4 1017.7 1021.3 1017.5 1019.1 1015.8 1017.5 1019.8 1023.3 1021.7 1020.8 1023.3 DAY 12 15 18 19 8 23 2 31 30 20 14 8 MIN. QNH PRESSURE IN HPA 1004.3 1004.8 1001.6 1010.9 1010.0 1008.3 1006.8 1009.0 1013.1 1016.5 1014.5 1004.0 1001.6 DAY 25 7 6 11 6 12 14 11 3 15 6 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 BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.4 775.8 775.2 778.1 776.4 776.4 774.4 775.8 779.7 781.7 780.6 776.6 777.3 MAX. QFE PRESSURE IN HPA 781.9 783.6 780.2 782.4 779.5 781.4 778.0 779.8 782.5 784.5 782.9 782.7 784.5 DAY 12 15 29 19 8 23 2 31 29 27 14 8 MIN. QFE PRESSURE IN HPA 768.5 769.1 765.8 774.1 773.5 772.3 771.3 772.5 775.8 779.4 777.4 769.4 765.8 DAY 25 7 6 10 6 11 13 11 3 4 30 25 MEAN QNH PRESSURE IN HPA 1013.8 1013.1 1012.4 1016.0 1013.8 1013.9 1011.4 1013.1 1018.0 1020.5 1019.1 1014.1 1014.9 MAX. QNH PRESSURE IN HPA 1020.7 1022.8 1018.6 1021.3 1017.7 1020.1 1015.8 1018.1 1021.4 1023.9 1021.9 1021.7 1023.9 DAY 12 15 29 19 8 23 2 31 29 27 14 8 MIN. QNH PRESSURE IN HPA 1004.0 1004.8 1000.7 1011.0 1010.3 1008.8 1007.5 1009.0 1013.1 1017.6 1015.1 1005.2 1000.7 DAY 25 7 6 10 6 11 13 11 3 4 30 25 MEAN QFF PRESSURE IN HPA 1015.2 1013.8 1008.6 1007.4 1001.2 997.1 991.9 995.1 1004.3 1012.3 1015.9 1013.8 1006.4 MAX. QFF PRESSURE IN HPA 1026.3 1028.0 1015.9 1012.5 1006.3 1006.0 997.5 1002.1 1012.3 1018.8 1021.9 1025.8 1028.0 DAY 12 15 17 19 8 24 2 31 29 27 24 23 MIN. QFF PRESSURE IN HPA 1004.9 1004.0 996.1 1001.8 997.2 991.1 986.9 988.8 996.4 1007.5 1006.7 1005.1 986.9 DAY 25 7 6 4 18 12 14 11 8 15 5 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.7 -1.8 2.5 10.0 15.2 21.5 25.5 23.1 18.3 13.3 8.3 2.4 11.1 MINIMUN AIR TEMPERATURE (C) -12.5 -7.7 -3.9 2.6 7.0 9.0 13.2 10.9 5.6 0.2 0.1 -2.6 1.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 25 21 15 2 0 0 0 0 0 0 8 13 84 DAYS WITH FREEZING MIN.<= 0 31 26 24 11 0 0 0 0 1 17 13 22 145 TEMPERATURE RECORDS LOWEST(C) -26.2 -19.0 -11.2 -4.6 0.4 5.4 9.4 8.0 0.0 -3.2 -9.0 -9.0 -26.2 DAY 29 13 11 5 14 20 12 23 12 30 27 10 MAXIMUM AIR TEMPERATURE (C) -1.3 2.5 6.6 14.4 19.5 26.7 30.8 28.7 23.9 20.0 13.1 6.2 15.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 22 13 0 0 0 0 38 DAYS WITH MAXIMUM TEMP. <= 0 14 7 0 0 0 0 0 0 0 0 0 0 21 TEMPERATURE RECORDS HIGHEST(C) 6.2 8.0 13.4 19.6 26.2 32.4 33.4 32.4 26.4 24.2 18.0 12.0 33.4 DAY 20 22 29 21 30 30 1 1 16 2 20 12 DIF. BETWEEN (MAX.-MIN.) (C) 11.2 10.2 10.5 11.8 12.5 17.7 17.6 17.8 18.3 19.8 13.0 8.8 14.1 MEAN DAILY TEMP. (MDT) (C) -6.9 -2.6 1.4 8.5 13.3 17.9 22.0 19.8 14.8 10.1 6.6 1.8 8.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.8 41.2 10.9 0.0 0.0 0.0 0.0 53.9 HEATING DEG. DAYS(BASE 18 0C) 771.5 597.1 516.0 285.4 146.2 23.4 0.0 5.3 96.7 244.3 341.6 502.9 3530.4 DEWPOINT (MEAN C) -12.6 -9.9 -8.1 -5.5 -0.7 -1.7 0.7 1.1 -4.9 -5.8 -5.1 -6.3 -4.9 MIXING RATIO (G/KG) 2.05 2.51 2.88 3.51 4.91 4.51 5.31 5.51 3.50 3.37 3.62 3.29 3.75 VAPOUR PRESSURE (HPA) 2.54 3.10 3.56 4.36 6.10 5.59 6.57 6.83 4.37 4.20 4.52 4.08 4.65 SATURATION DEF. (HPA) 1.87 2.57 4.13 8.51 11.86 21.35 27.59 23.20 18.04 12.33 7.00 3.43 11.82 RELATIVE HUMIDITY (MEAN %) 61 56 49 38 38 24 22 26 22 29 43 57 39 RELATIVE HUMIDITY (MAX. %) 73 71 71 60 63 46 38 46 41 48 63 76 58 RELATIVE HUMIDITY (MIN. %) 48 43 33 25 25 14 14 17 14 18 29 41 27 RELATIVE HUMIDITY (MEAN% 03UTC) 69 65 68 57 59 46 38 46 41 48 61 71 56 RELATIVE HUMIDITY (MEAN% 09UTC) 54 48 40 29 30 18 16 19 15 21 32 48 31 RELATIVE HUMIDITY (MEAN% 15UTC) 62 59 47 37 35 19 18 21 19 27 42 59 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 41.9 50.4 21.7 21.7 27.8 0.1 0.0 0.0 0.0 0.0 9.6 40.1 213.3 DAYS WITH PRECIPITATION >=10 1 1 1 0 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 5 3 1 2 2 2 0 0 0 0 0 1 3 14 DAYS WITH PRECIPITATION >= 1 6 6 3 5 7 0 0 0 0 0 2 9 38 DAYS WITH PRECIPITATION 12 7 5 7 8 1 0 0 0 0 4 10 54 GREATEST DAILY PRECIPITATION 15.0 37.0 12.0 8.0 9.2 0.1 0.0 0.0 0.0 0.0 7.0 12.0 37.0 DAY 21 25 31 25 11 7 ** ** ** ** 26 17 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 12 6 1 3 0 0 0 0 0 0 1 5 28 DAYS WITH DUST 0 0 0 0 11 7 0 4 4 0 2 0 28 WIND DIRECTION (PREVAILING) 225 225 225 270 270 270 90 90 270 270 225 225 270 PREVAILING WIND SPEED(KNOTS) 7.8 9.0 9.8 9.3 10.7 8.5 6.4 7.8 9.2 6.1 10.2 8.4 8.8 PREVAILING WIND PERCENT 16.8 23.4 26.5 30.7 38.1 26.7 17.4 27.7 21.3 17.4 16.7 23.2 20.5 CALMS PERCENT OF WIND 29.0 18.6 20.0 21.3 18.1 38.0 31.6 24.5 34.0 62.6 47.3 43.2 32.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 215 229 233 241 251 246 75 70 293 284 230 219 237 VECTOR WIND MAGNITUDE(KNOTS) 2.4 4.5 5.1 6.2 6.0 3.9 0.9 2.1 1.5 0.5 3.1 3.5 2.7 WIND STEADINESES (MEAN %) 49.0 67.2 69.9 80.5 74.1 76.5 22.0 33.3 34.9 22.7 66.0 76.1 49.1 WIND SPEED (MEAN KNOTS) 4.9 6.7 7.3 7.7 8.1 5.1 4.1 6.3 4.3 2.2 4.7 4.6 5.5 FASTEST WIND DIRECTION 160 180 240 240 280 260 30 300 290 280 230 180 280 FASTEST WIND SPEED (KNOTS) 21 23 23 23 35 23 16 19 19 12 31 23 35 DAY 30 24 10 15 20 2 28 12 17 2 25 14 DAYS WITH SKY CLEAR (0-2)/8 18 16 15 10 15 27 23 26 29 31 12 14 236 DAYS WITH P.CLOUDY (3-6)/8 10 11 13 20 15 3 8 5 1 0 18 15 119 DAYS WITH CLOUDY (7-8)/8 3 2 3 0 1 0 0 0 0 0 0 2 11 DAYS WITH VISIBILITY =< 2 KM 2 0 0 0 0 0 0 0 0 0 0 1 3 DURATION OF SUNSHINE HOURS 202.2 230.8 245.2 238.4 290.4 350.9 322.9 335.6 328.0 311.4 204.1 195.0 3254.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 774.9 773.9 774.9 776.6 778.5 777.1 776.6 777.9 780.9 781.2 781.3 777.1 777.6 MAX. QFE PRESSURE IN HPA 784.8 780.8 781.9 782.0 783.6 783.1 780.9 782.6 784.6 786.1 787.3 783.6 787.3 DAY-HOUR 10- 6 16- 6 13- 6 21- 6 29- 6 11- 6 6- 6 16- 6 22- 6 30- 6 4- 6 1- 6 MIN. QFE PRESSURE IN HPA 764.1 766.1 767.1 769.3 772.6 771.9 771.7 772.5 777.1 775.9 772.5 772.5 764.1 DAY-HOUR 30-15 25- 3 31- 3 18- 3 4-12 27-12 18-15 1-15 6-12 7-12 26- 3 19-12 MEAN QNH PRESSURE IN HPA 1012.0 1010.7 1012.0 1014.1 1016.4 1014.7 1014.0 1015.7 1019.5 1019.8 1019.9 1014.7 1015.3 MAX. QNH PRESSURE IN HPA 1024.3 1019.3 1020.7 1020.8 1022.8 1022.2 1019.4 1021.5 1024.0 1025.9 1027.4 1022.8 1027.4 DAY-HOUR 10- 6 16- 6 13- 6 21- 6 29- 6 11- 6 6- 6 16- 6 22- 6 30- 6 4- 6 1- 6 MIN. QNH PRESSURE IN HPA 998.6 1001.1 1002.3 1005.0 1009.1 1008.3 1008.0 1009.0 1014.7 1013.2 1009.0 1009.0 998.6 DAY-HOUR 30-15 25- 3 31- 3 18- 3 4-12 27-12 18-15 1-15 6-12 7-12 26- 3 19-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 774.7 773.7 774.9 776.5 778.7 777.5 777.2 778.6 781.5 781.8 781.5 777.1 777.8 MAX. QFE PRESSURE IN HPA 783.8 779.6 781.1 781.6 783.2 782.7 780.6 782.4 784.1 785.6 786.4 782.4 786.4 DAY 10 16 13 21 29 11 6 16 22 30 4 1 MIN. QFE PRESSURE IN HPA 768.2 766.1 767.1 769.3 773.5 773.5 772.4 774.7 779.1 777.5 772.5 773.0 766.1 DAY 3 25 31 18 4 27 19 2 18 7 26 22 MEAN QNH PRESSURE IN HPA 1011.7 1010.5 1011.9 1014.0 1016.7 1015.3 1014.8 1016.6 1020.2 1020.5 1020.2 1014.7 1015.6 MAX. QNH PRESSURE IN HPA 1023.0 1017.8 1019.7 1020.3 1022.3 1021.7 1019.1 1021.3 1023.4 1025.3 1026.3 1021.3 1026.3 DAY 10 16 13 21 29 11 6 16 22 30 4 1 MIN. QNH PRESSURE IN HPA 1003.7 1001.1 1002.3 1005.0 1010.3 1010.3 1008.9 1011.7 1017.2 1015.2 1009.0 1009.6 1001.1 DAY 3 25 31 18 4 27 19 2 18 7 26 22 MEAN QFF PRESSURE IN HPA 1020.4 1014.6 1012.2 1007.5 1005.4 999.4 995.7 999.6 1008.6 1013.6 1016.0 1014.9 1009.0 MAX. QFF PRESSURE IN HPA 1042.6 1029.8 1026.0 1015.3 1013.4 1007.0 999.6 1007.6 1012.9 1022.7 1026.2 1024.0 1042.6 DAY 10 13 13 20 14 7 16 31 2 30 18 11 MIN. QFF PRESSURE IN HPA 1004.2 998.6 997.9 996.6 998.2 992.5 987.3 992.7 1004.3 1007.0 1004.1 1007.4 987.3 DAY 3 25 31 18 4 28 19 2 18 7 26 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 775.9 774.6 775.8 777.3 779.1 777.8 777.5 779.0 782.0 782.5 782.3 778.1 778.5 MAX. QFE PRESSURE IN HPA 784.8 780.8 781.9 782.0 783.6 783.1 780.9 782.6 784.6 786.1 787.3 783.6 787.3 DAY 10 16 13 21 29 11 6 16 22 30 4 1 MIN. QFE PRESSURE IN HPA 769.6 768.3 768.3 770.1 773.6 773.7 773.0 775.1 779.3 777.9 774.1 774.5 768.3 DAY 25 25 31 18 4 27 19 1 6 7 26 30 MEAN QNH PRESSURE IN HPA 1013.2 1011.7 1013.1 1015.0 1017.1 1015.5 1015.3 1017.1 1020.8 1021.4 1021.2 1015.9 1016.4 MAX. QNH PRESSURE IN HPA 1024.3 1019.3 1020.7 1020.8 1022.8 1022.2 1019.4 1021.5 1024.0 1025.9 1027.4 1022.8 1027.4 DAY 10 16 13 21 29 11 6 16 22 30 4 1 MIN. QNH PRESSURE IN HPA 1005.4 1003.8 1003.8 1006.0 1010.4 1010.5 1009.6 1012.2 1017.5 1015.7 1011.0 1011.5 1003.8 DAY 25 25 31 18 4 27 19 1 6 7 26 30 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 774.9 774.1 775.2 776.8 778.6 777.2 776.8 778.1 781.1 781.1 781.1 776.8 777.6 MAX. QFE PRESSURE IN HPA 783.5 779.7 781.6 780.9 783.1 782.0 780.0 781.6 783.5 784.8 785.8 782.0 785.8 DAY 10 16 12 21 29 11 6 16 22 29 4 1 MIN. QFE PRESSURE IN HPA 768.0 768.4 769.1 770.8 773.0 773.0 773.0 774.2 778.3 776.4 773.3 772.8 768.0 DAY 30 11 31 18 4 27 19 1 6 7 26 30 MEAN QNH PRESSURE IN HPA 1012.0 1010.9 1012.4 1014.4 1016.6 1014.9 1014.3 1016.0 1019.7 1019.7 1019.6 1014.4 1015.4 MAX. QNH PRESSURE IN HPA 1022.7 1018.0 1020.3 1019.4 1022.2 1020.8 1018.3 1020.3 1022.7 1024.3 1025.5 1020.8 1025.5 DAY 10 16 12 21 29 11 6 16 22 29 4 1 MIN. QNH PRESSURE IN HPA 1003.4 1003.9 1004.8 1006.9 1009.6 1009.6 1009.6 1011.1 1016.2 1013.9 1010.0 1009.4 1003.4 DAY 30 11 31 18 4 27 19 1 6 7 26 30 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 774.3 773.2 774.2 775.9 777.9 776.4 775.7 776.9 780.0 780.1 780.4 776.3 776.8 MAX. QFE PRESSURE IN HPA 782.7 778.9 780.3 780.0 781.9 781.0 778.8 780.3 782.2 783.8 784.7 781.2 784.7 DAY 10 16 12 12 29 7 6 15 2 29 4 1 MIN. QFE PRESSURE IN HPA 765.4 767.6 768.6 770.6 772.6 771.9 772.2 772.8 777.1 775.9 773.7 772.5 765.4 DAY 30 11 22 18 4 27 19 1 6 7 26 19 MEAN QNH PRESSURE IN HPA 1011.2 1009.9 1011.2 1013.3 1015.8 1013.9 1013.0 1014.5 1018.3 1018.4 1018.9 1013.8 1014.3 MAX. QNH PRESSURE IN HPA 1021.7 1017.0 1018.7 1018.3 1020.7 1019.6 1016.8 1018.7 1021.1 1023.0 1024.2 1019.8 1024.2 DAY 10 16 12 12 29 7 6 15 2 29 4 1 MIN. QNH PRESSURE IN HPA 1000.2 1002.9 1004.2 1006.6 1009.1 1008.3 1008.6 1009.4 1014.7 1013.2 1010.5 1009.0 1000.2 DAY 30 11 22 18 4 27 19 1 6 7 26 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 774.9 773.9 774.6 776.4 778.2 776.6 775.6 777.0 780.2 780.5 781.2 777.2 777.2 MAX. QFE PRESSURE IN HPA 783.0 779.2 780.7 780.9 781.7 781.5 778.7 780.7 782.7 784.4 785.4 782.1 785.4 DAY 10 16 12 21 29 7 6 31 21 29 4 1 MIN. QFE PRESSURE IN HPA 764.1 768.0 769.4 770.6 773.4 771.9 771.7 772.5 777.4 776.2 775.0 772.8 764.1 DAY 30 10 30 18 4 27 18 1 6 7 26 21 MEAN QNH PRESSURE IN HPA 1012.0 1010.7 1011.6 1013.8 1016.0 1014.1 1012.9 1014.6 1018.6 1019.0 1019.8 1014.8 1014.8 MAX. QNH PRESSURE IN HPA 1022.0 1017.3 1019.2 1019.4 1020.4 1020.2 1016.7 1019.2 1021.7 1023.8 1025.0 1020.9 1025.0 DAY 10 16 12 21 29 7 6 31 21 29 4 1 MIN. QNH PRESSURE IN HPA 998.6 1003.4 1005.2 1006.6 1010.1 1008.3 1008.0 1009.0 1015.1 1013.6 1012.1 1009.4 998.6 DAY 30 10 30 18 4 27 18 1 6 7 26 21 MEAN QFF PRESSURE IN HPA 1020.7 1014.8 1011.7 1007.1 1004.7 998.1 993.7 997.6 1006.9 1012.0 1015.7 1015.0 1008.2 MAX. QFF PRESSURE IN HPA 1040.7 1030.1 1025.2 1012.4 1010.9 1008.9 997.4 1006.4 1010.5 1021.2 1023.8 1023.7 1040.7 DAY 10 16 12 20 14 7 15 31 2 29 18 10 MIN. QFF PRESSURE IN HPA 999.4 1004.2 1001.1 1000.2 999.1 991.1 986.3 988.9 1002.3 1005.8 1004.9 1007.0 986.3 DAY 2 10 30 27 4 27 18 1 6 6 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.8 0.8 4.5 11.1 16.0 22.4 24.4 23.9 20.8 12.7 8.3 6.2 12.5 MINIMUN AIR TEMPERATURE (C) -6.4 -5.0 -1.4 2.6 6.1 8.5 11.2 11.0 6.8 1.6 0.5 -3.1 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 23 14 8 0 0 0 0 0 0 0 7 14 66 DAYS WITH FREEZING MIN.<= 0 29 19 19 8 1 0 0 0 0 9 14 27 126 TEMPERATURE RECORDS LOWEST(C) -15.6 -20.6 -9.5 -3.2 -0.2 1.4 8.6 8.4 1.8 -3.6 -7.8 -10.0 -20.6 DAY 16 9 13 10 8 5 19 12 30 9 30 13 MAXIMUM AIR TEMPERATURE (C) 3.3 4.9 8.4 15.6 20.6 27.8 29.7 29.5 27.1 18.5 13.1 12.2 17.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 5 17 12 2 0 0 0 36 DAYS WITH MAXIMUM TEMP. <= 0 8 5 0 0 0 0 0 0 0 0 0 0 13 TEMPERATURE RECORDS HIGHEST(C) 9.2 12.0 15.4 21.6 26.6 31.6 32.6 32.2 30.2 23.4 17.2 16.2 32.6 DAY 28 27 31 19 26 30 15 15 3 1 1 20 DIF. BETWEEN (MAX.-MIN.) (C) 9.7 9.9 9.8 13.0 14.5 19.3 18.5 18.5 20.3 16.9 12.6 15.3 14.9 MEAN DAILY TEMP. (MDT) (C) -1.6 -0.0 3.5 9.1 13.3 18.1 20.5 20.3 17.0 10.1 6.8 4.6 10.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.1 7.5 7.9 0.0 0.0 0.0 0.0 15.5 HEATING DEG. DAYS(BASE 18 0C) 606.9 504.7 449.2 266.9 145.8 20.8 0.1 0.1 40.1 245.7 335.9 416.1 3032.3 DEWPOINT (MEAN C) -7.9 -6.7 -5.7 -3.4 0.4 -2.4 0.4 0.3 -4.3 -5.1 -4.3 -7.0 -3.8 MIXING RATIO (G/KG) 2.87 3.24 3.47 4.05 5.20 4.28 5.17 5.13 3.67 3.49 3.76 3.05 3.95 VAPOUR PRESSURE (HPA) 3.57 4.01 4.30 5.02 6.46 5.31 6.41 6.36 4.57 4.36 4.69 3.81 4.91 SATURATION DEF. (HPA) 2.48 2.96 4.48 8.75 12.74 23.40 25.57 24.83 21.71 11.27 6.83 6.22 12.60 RELATIVE HUMIDITY (MEAN %) 63 61 53 41 39 22 23 23 20 32 45 42 39 RELATIVE HUMIDITY (MAX. %) 77 79 75 64 67 48 42 41 37 50 66 61 59 RELATIVE HUMIDITY (MIN. %) 50 46 37 27 25 12 14 15 12 21 29 27 26 RELATIVE HUMIDITY (MEAN% 03UTC) 74 73 70 63 67 48 42 41 37 49 64 59 57 RELATIVE HUMIDITY (MEAN% 09UTC) 57 54 50 33 30 15 17 17 14 23 35 35 32 RELATIVE HUMIDITY (MEAN% 15UTC) 62 62 46 35 34 15 18 19 15 31 43 38 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 88.0 85.9 71.3 16.2 22.0 0.0 2.3 0.2 0.0 2.4 42.2 1.0 331.5 DAYS WITH PRECIPITATION >=10 3 2 2 0 1 0 0 0 0 0 2 0 10 DAYS WITH PRECIPITATION >= 5 5 3 7 1 1 0 0 0 0 0 3 0 20 DAYS WITH PRECIPITATION >= 1 8 7 10 4 4 0 1 0 0 1 5 0 40 DAYS WITH PRECIPITATION 12 9 14 5 7 0 2 1 0 2 7 2 61 GREATEST DAILY PRECIPITATION 37.0 55.0 15.0 8.0 14.0 0.0 2.0 0.2 0.0 2.0 17.0 0.6 55.0 DAY 8 3 9 27 6 ** 30 27 ** 30 12 25 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 1 0 0 0 0 1 DAYS WITH SNOW OR SLEET 7 4 3 0 0 0 0 0 0 0 0 0 14 DAYS WITH DUST 0 0 1 1 7 2 1 0 0 0 0 0 12 WIND DIRECTION (PREVAILING) 270 225 270 225 270 270 45 90 90 90 270 270 270 PREVAILING WIND SPEED(KNOTS) 8.1 8.0 9.7 8.7 9.0 9.0 7.8 8.0 6.7 5.5 10.1 8.8 8.9 PREVAILING WIND PERCENT 14.8 16.4 23.9 28.7 24.5 21.3 19.4 15.5 14.0 13.5 23.3 17.4 17.2 CALMS PERCENT OF WIND 57.4 44.3 33.5 30.0 39.4 43.3 44.5 47.1 56.0 48.4 49.3 59.4 46.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 231 224 235 244 250 257 62 86 68 330 242 244 241 VECTOR WIND MAGNITUDE(KNOTS) 2.0 3.6 3.8 4.9 3.4 1.8 1.7 0.5 0.7 0.5 4.6 2.2 1.9 WIND STEADINESES (MEAN %) 62.5 75.0 61.3 80.3 64.2 41.9 38.6 12.8 26.9 13.9 86.8 71.0 43.2 WIND SPEED (MEAN KNOTS) 3.2 4.8 6.2 6.1 5.3 4.3 4.4 3.9 2.6 3.6 5.3 3.1 4.4 FASTEST WIND DIRECTION 260 260 180 270 180 250 310 240 60 270 240 260 250 FASTEST WIND SPEED (KNOTS) 25 21 27 21 19 29 19 16 14 19 23 16 29 DAY 29 28 3 21 2 1 25 10 15 28 11 3 DAYS WITH SKY CLEAR (0-2)/8 15 12 8 9 10 30 25 23 30 16 12 16 206 DAYS WITH P.CLOUDY (3-6)/8 10 14 14 18 17 0 6 8 0 14 16 12 129 DAYS WITH CLOUDY (7-8)/8 6 2 9 3 4 0 0 0 0 1 2 3 30 DAYS WITH VISIBILITY =< 2 KM 3 1 1 0 0 0 0 0 0 0 0 0 5 DURATION OF SUNSHINE HOURS 195.6 200.7 193.2 246.1 256.8 ****** ****** ****** 295.8 254.7 230.4 243.3 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.4 776.4 776.3 778.2 779.3 777.5 777.0 778.6 779.7 782.9 779.8 780.7 778.6 MAX. QFE PRESSURE IN HPA 783.3 781.1 784.5 785.4 783.0 783.1 781.9 783.0 784.3 788.0 784.4 787.0 788.0 DAY-HOUR 27- 6 8- 6 31- 6 18- 6 27- 6 23- 6 27- 3 31- 6 23- 6 17- 6 20- 6 26- 6 MIN. QFE PRESSURE IN HPA 769.0 768.8 769.6 772.8 775.1 773.2 772.0 772.9 775.8 778.4 774.0 773.4 768.8 DAY-HOUR 8- 9 4-15 12- 3 13-12 7- 3 25-12 9-15 12-15 28-12 3-12 14- 3 4-15 MEAN QNH PRESSURE IN HPA 1013.9 1013.9 1013.8 1016.1 1017.4 1015.2 1014.6 1016.6 1017.9 1021.9 1018.1 1019.1 1016.5 MAX. QNH PRESSURE IN HPA 1022.4 1019.7 1023.9 1025.0 1022.0 1022.2 1020.7 1022.0 1023.7 1028.3 1023.8 1027.0 1028.3 DAY-HOUR 27- 6 8- 6 31- 6 18- 6 27- 6 23- 6 27- 3 31- 6 23- 6 17- 6 20- 6 26- 6 MIN. QNH PRESSURE IN HPA 1004.7 1004.4 1005.4 1009.4 1012.2 1009.9 1008.4 1009.5 1013.1 1016.3 1010.9 1010.1 1004.4 DAY-HOUR 8- 9 4-15 12- 3 13-12 7- 3 25-12 9-15 12-15 28-12 3-12 14- 3 4-15 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 776.3 776.3 776.5 778.4 779.5 778.1 777.7 779.2 780.2 783.3 779.8 780.9 778.9 MAX. QFE PRESSURE IN HPA 782.4 780.2 783.6 784.6 782.7 782.9 781.9 782.5 783.1 787.4 783.6 786.5 787.4 DAY 27 8 31 17 27 23 27 31 24 17 21 27 MIN. QFE PRESSURE IN HPA 769.1 770.3 769.6 773.5 775.1 775.2 773.4 775.0 776.5 780.2 774.0 775.2 769.1 DAY 9 5 12 13 7 4 12 13 29 28 14 5 MEAN QNH PRESSURE IN HPA 1013.7 1013.8 1014.0 1016.4 1017.6 1015.9 1015.4 1017.3 1018.6 1022.4 1018.1 1019.4 1016.9 MAX. QNH PRESSURE IN HPA 1021.3 1018.6 1022.8 1024.0 1021.7 1021.9 1020.7 1021.4 1022.2 1027.5 1022.8 1026.4 1027.5 DAY 27 8 31 17 27 23 27 31 24 17 21 27 MIN. QNH PRESSURE IN HPA 1004.8 1006.3 1005.4 1010.3 1012.2 1012.4 1010.1 1012.1 1014.0 1018.6 1010.9 1012.4 1004.8 DAY 9 5 12 13 7 4 12 13 29 28 14 5 MEAN QFF PRESSURE IN HPA 1017.0 1015.6 1011.8 1008.9 1005.8 999.4 997.2 1000.0 1005.0 1015.3 1013.4 1017.8 1008.9 MAX. QFF PRESSURE IN HPA 1026.3 1035.7 1020.0 1017.2 1011.0 1006.1 1003.2 1005.8 1011.2 1021.0 1021.5 1027.0 1035.7 DAY 2 9 31 1 3 23 27 29 24 17 30 26 MIN. QFF PRESSURE IN HPA 1001.6 1004.1 1003.7 1000.7 999.2 995.4 989.2 994.1 999.8 1009.1 1003.0 1008.8 989.2 DAY 9 3 21 26 29 13 12 13 3 28 11 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 777.4 777.2 777.2 779.1 779.9 778.4 777.9 779.7 781.0 784.2 780.7 781.7 779.5 MAX. QFE PRESSURE IN HPA 783.3 781.1 784.5 785.4 783.0 783.1 781.8 783.0 784.3 788.0 784.4 787.0 788.0 DAY 27 8 31 18 27 23 28 31 23 17 20 26 MIN. QFE PRESSURE IN HPA 770.6 771.3 770.6 774.0 775.5 775.7 774.0 775.8 777.7 780.9 775.2 775.9 770.6 DAY 8 4 12 13 7 4 13 12 29 28 16 4 MEAN QNH PRESSURE IN HPA 1015.0 1014.9 1014.9 1017.2 1018.2 1016.3 1015.7 1017.9 1019.5 1023.5 1019.2 1020.5 1017.7 MAX. QNH PRESSURE IN HPA 1022.4 1019.7 1023.9 1025.0 1022.0 1022.2 1020.6 1022.0 1023.7 1028.3 1023.8 1027.0 1028.3 DAY 27 8 31 18 27 23 28 31 23 17 20 26 MIN. QNH PRESSURE IN HPA 1006.6 1007.5 1006.6 1010.9 1012.7 1013.0 1010.9 1013.1 1015.5 1019.4 1012.4 1013.2 1006.6 DAY 8 4 12 13 7 4 13 12 29 28 16 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 776.3 776.5 776.5 778.4 779.5 777.7 777.2 778.8 779.9 782.8 779.6 780.4 778.6 MAX. QFE PRESSURE IN HPA 782.2 780.3 783.3 784.3 781.9 782.0 781.3 782.1 783.5 786.4 783.0 786.0 786.4 DAY 27 8 31 18 27 23 27 30 23 17 20 26 MIN. QFE PRESSURE IN HPA 769.0 769.7 769.9 773.3 775.3 774.9 773.1 774.4 777.1 779.7 774.9 774.4 769.0 DAY 8 4 12 13 7 15 14 12 29 3 16 4 MEAN QNH PRESSURE IN HPA 1013.8 1014.0 1014.0 1016.4 1017.6 1015.4 1014.8 1016.8 1018.2 1021.8 1017.8 1018.8 1016.6 MAX. QNH PRESSURE IN HPA 1021.1 1018.7 1022.4 1023.7 1020.7 1020.8 1019.9 1020.9 1022.7 1026.3 1022.0 1025.8 1026.3 DAY 27 8 31 18 27 23 27 30 23 17 20 26 MIN. QNH PRESSURE IN HPA 1004.7 1005.5 1005.8 1010.0 1012.5 1012.0 1009.8 1011.4 1014.7 1018.0 1012.0 1011.4 1004.7 DAY 8 4 12 13 7 15 14 12 29 3 16 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 775.7 775.7 775.5 777.5 778.7 776.8 776.2 777.7 778.7 781.9 779.2 779.8 777.8 MAX. QFE PRESSURE IN HPA 781.2 779.5 781.7 782.3 781.6 780.5 780.4 781.0 782.4 785.7 782.3 785.2 785.7 DAY 27 8 31 18 27 23 27 28 23 17 2 26 MIN. QFE PRESSURE IN HPA 769.0 768.9 769.7 772.8 775.1 773.2 772.2 773.2 775.8 778.4 775.4 773.5 768.9 DAY 8 4 12 13 7 25 14 12 28 3 16 4 MEAN QNH PRESSURE IN HPA 1013.0 1013.0 1012.7 1015.3 1016.7 1014.3 1013.5 1015.5 1016.6 1020.7 1017.3 1018.1 1015.6 MAX. QNH PRESSURE IN HPA 1019.8 1017.7 1020.4 1021.2 1020.3 1018.9 1018.8 1019.6 1021.3 1025.4 1021.2 1024.8 1025.4 DAY 27 8 31 18 27 23 27 28 23 17 2 26 MIN. QNH PRESSURE IN HPA 1004.7 1004.5 1005.5 1009.4 1012.2 1009.9 1008.6 1009.9 1013.1 1016.3 1012.6 1010.3 1004.5 DAY 8 4 12 13 7 25 14 12 28 3 16 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.4 776.3 775.9 777.7 778.8 776.8 776.1 777.7 778.7 782.3 779.8 780.5 778.1 MAX. QFE PRESSURE IN HPA 782.1 780.0 781.7 783.0 781.6 780.4 780.0 781.7 782.3 786.0 782.9 786.0 786.0 DAY 26 8 30 16 27 22 26 28 23 17 1 26 MIN. QFE PRESSURE IN HPA 769.3 768.8 770.4 773.7 775.4 773.2 772.0 772.9 775.8 778.8 775.9 773.4 768.8 DAY 8 4 21 12 7 25 9 12 28 3 10 4 MEAN QNH PRESSURE IN HPA 1013.9 1013.7 1013.3 1015.5 1016.8 1014.3 1013.4 1015.4 1016.8 1021.2 1018.1 1019.0 1015.9 MAX. QNH PRESSURE IN HPA 1020.9 1018.3 1020.4 1022.0 1020.3 1018.8 1018.3 1020.4 1021.2 1025.8 1021.9 1025.8 1025.8 DAY 26 8 30 16 27 22 26 28 23 17 1 26 MIN. QNH PRESSURE IN HPA 1005.0 1004.4 1006.4 1010.5 1012.6 1009.9 1008.4 1009.5 1013.1 1016.8 1013.2 1010.1 1004.4 DAY 8 4 21 12 7 25 9 12 28 3 10 4 MEAN QFF PRESSURE IN HPA 1017.1 1015.4 1011.0 1007.9 1004.9 997.9 995.2 998.0 1003.1 1014.1 1013.5 1017.2 1007.9 MAX. QFF PRESSURE IN HPA 1025.7 1033.8 1017.6 1014.7 1010.7 1002.8 1001.2 1004.0 1009.6 1019.3 1021.2 1027.1 1033.8 DAY 2 9 17 6 10 22 26 28 23 17 30 26 MIN. QFF PRESSURE IN HPA 999.8 1003.5 1002.8 1001.2 999.7 993.8 989.6 991.7 996.3 1007.5 1004.8 1006.9 989.6 DAY 8 4 21 26 31 14 12 12 3 3 10 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.1 2.5 6.6 12.8 16.8 23.4 27.4 26.7 17.9 12.5 8.2 1.9 13.2 MINIMUN AIR TEMPERATURE (C) -5.6 -5.7 -1.4 2.8 6.1 8.8 14.3 12.4 5.3 2.7 1.8 -5.0 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 19 22 9 0 0 0 0 0 0 0 2 19 71 DAYS WITH FREEZING MIN.<= 0 27 26 22 7 1 0 0 0 3 5 11 25 127 TEMPERATURE RECORDS LOWEST(C) -18.2 -12.0 -7.0 -2.4 0.0 4.4 9.0 8.4 -1.4 -3.0 -4.2 -14.0 -18.2 DAY 28 21 17 6 7 30 1 26 22 13 14 8 MAXIMUM AIR TEMPERATURE (C) 6.1 7.3 11.6 17.9 21.8 28.6 33.2 32.7 23.9 18.0 12.6 6.8 18.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 6 29 31 0 0 0 0 66 DAYS WITH MAXIMUM TEMP. <= 0 3 0 0 0 0 0 0 0 0 0 0 3 6 TEMPERATURE RECORDS HIGHEST(C) 14.0 13.0 16.8 22.6 27.8 30.8 36.6 35.6 29.6 22.0 18.0 11.8 36.6 DAY 1 27 30 29 31 25 21 5 2 1 4 29 DIF. BETWEEN (MAX.-MIN.) (C) 11.7 13.0 13.0 15.1 15.7 19.8 18.9 20.3 18.6 15.3 10.8 11.8 15.4 MEAN DAILY TEMP. (MDT) (C) 0.3 0.8 5.1 10.4 13.9 18.7 23.8 22.6 14.6 10.4 7.2 0.9 10.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.3 88.0 56.9 0.0 0.0 0.0 0.0 146.2 HEATING DEG. DAYS(BASE 18 0C) 549.7 482.1 400.2 229.4 126.8 6.7 0.0 0.0 110.2 236.4 323.7 530.5 2995.7 DEWPOINT (MEAN C) -8.0 -11.1 -7.2 -2.7 -1.9 -3.5 2.9 -0.5 -4.2 -1.3 -3.2 -11.0 -4.3 MIXING RATIO (G/KG) 2.82 2.22 3.09 4.20 4.46 3.89 6.29 4.89 3.83 4.63 4.13 2.31 3.90 VAPOUR PRESSURE (HPA) 3.51 2.75 3.83 5.22 5.55 4.82 7.74 6.04 4.78 5.78 5.15 2.88 4.84 SATURATION DEF. (HPA) 3.62 4.94 6.40 10.40 14.54 25.21 30.69 31.13 17.13 9.50 6.16 4.53 13.69 RELATIVE HUMIDITY (MEAN %) 54 40 42 38 32 18 23 18 24 42 49 42 35 RELATIVE HUMIDITY (MAX. %) 69 58 64 65 54 33 41 33 39 65 65 61 54 RELATIVE HUMIDITY (MIN. %) 40 25 28 24 20 12 15 12 16 28 36 27 24 RELATIVE HUMIDITY (MEAN% 03UTC) 65 55 62 62 52 33 41 33 39 63 61 58 52 RELATIVE HUMIDITY (MEAN% 09UTC) 46 30 37 27 24 13 17 13 19 32 43 31 28 RELATIVE HUMIDITY (MEAN% 15UTC) 54 38 35 34 29 14 18 14 20 40 50 44 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 36.7 18.8 55.8 24.7 17.5 0.0 1.0 0.0 0.6 3.5 109.7 21.5 289.8 DAYS WITH PRECIPITATION >=10 1 1 3 1 0 0 0 0 0 0 4 0 10 DAYS WITH PRECIPITATION >= 5 3 1 3 1 1 0 0 0 0 0 8 2 19 DAYS WITH PRECIPITATION >= 1 5 2 4 5 4 0 1 0 0 1 9 7 38 DAYS WITH PRECIPITATION 7 4 6 7 5 0 1 0 1 3 10 10 54 GREATEST DAILY PRECIPITATION 15.0 16.0 32.0 13.0 8.0 0.0 1.0 0.0 0.6 2.0 39.0 5.0 39.0 DAY 24 1 12 2 6 ** 12 ** 30 18 17 1 DAY WITH THUNDER STORM 0 0 0 1 0 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 3 2 1 0 0 0 0 0 0 0 1 2 9 DAYS WITH DUST 1 0 2 2 2 2 1 0 0 0 1 1 12 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 90 90 90 270 225 270 270 PREVAILING WIND SPEED(KNOTS) 6.9 10.5 6.6 7.9 8.6 9.6 7.2 6.3 7.5 8.8 7.4 8.8 8.3 PREVAILING WIND PERCENT 17.4 30.0 27.1 20.7 27.7 22.7 18.7 23.2 22.0 16.8 19.3 23.2 19.5 CALMS PERCENT OF WIND 56.8 35.7 34.2 37.3 32.9 29.3 43.2 39.4 45.3 47.1 39.3 47.7 40.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 233 246 233 251 259 232 117 91 69 310 224 244 239 VECTOR WIND MAGNITUDE(KNOTS) 2.1 4.7 3.8 2.2 3.3 3.1 0.6 0.4 2.0 0.6 3.5 3.3 1.9 WIND STEADINESES (MEAN %) 70.0 75.8 74.5 44.9 61.1 50.0 14.3 10.3 52.6 16.2 70.0 73.3 41.3 WIND SPEED (MEAN KNOTS) 3.0 6.2 5.1 4.9 5.4 6.2 4.2 3.9 3.8 3.7 5.0 4.5 4.6 FASTEST WIND DIRECTION 230 260 200 310 330 260 80 290 70 250 260 240 260 FASTEST WIND SPEED (KNOTS) 19 21 19 17 21 17 16 14 17 16 25 21 25 DAY 4 12 7 30 27 4 13 9 6 2 23 6 DAYS WITH SKY CLEAR (0-2)/8 13 17 14 12 16 28 25 25 19 15 10 18 212 DAYS WITH P.CLOUDY (3-6)/8 13 11 15 15 15 2 6 6 11 16 13 11 134 DAYS WITH CLOUDY (7-8)/8 5 0 2 3 0 0 0 0 0 0 7 2 19 DAYS WITH VISIBILITY =< 2 KM 2 0 1 0 0 0 0 0 0 0 0 0 3 DURATION OF SUNSHINE HOURS 193.5 247.4 259.4 263.4 318.1 373.7 335.6 350.0 307.9 260.8 190.5 243.9 3344.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 777.7 775.1 776.9 779.1 778.9 775.4 774.1 775.9 780.9 782.5 779.9 778.2 777.9 MAX. QFE PRESSURE IN HPA 784.4 780.4 782.9 784.5 783.9 779.8 777.4 779.9 787.4 787.0 786.5 782.9 787.4 DAY-HOUR 10- 6 20- 6 31- 6 29- 6 15- 3 9- 6 3- 6 23- 6 23- 6 10- 6 2- 6 15- 6 MIN. QFE PRESSURE IN HPA 766.1 767.3 767.1 773.0 773.3 771.0 770.8 771.7 774.2 778.4 772.7 767.0 766.1 DAY-HOUR 16-12 12- 3 12-12 3-12 1-12 29-12 21-12 1-15 1-12 3-12 25-15 4-12 MEAN QNH PRESSURE IN HPA 1015.4 1012.2 1014.5 1017.2 1017.0 1012.6 1010.9 1013.2 1019.4 1021.4 1018.1 1016.1 1015.7 MAX. QNH PRESSURE IN HPA 1023.8 1018.8 1021.9 1023.9 1023.2 1018.1 1015.1 1018.2 1027.5 1027.0 1026.4 1021.9 1027.5 DAY-HOUR 10- 6 20- 6 31- 6 29- 6 15- 3 9- 6 3- 6 23- 6 23- 6 10- 6 2- 6 15- 6 MIN. QNH PRESSURE IN HPA 1001.1 1002.6 1002.3 1009.6 1010.0 1007.1 1006.9 1008.0 1011.1 1016.3 1009.3 1002.2 1001.1 DAY-HOUR 16-12 12- 3 12-12 3-12 1-12 29-12 21-12 1-15 1-12 3-12 25-15 4-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 777.9 775.1 777.1 779.6 779.3 776.0 775.0 776.8 781.5 783.1 780.0 778.2 778.3 MAX. QFE PRESSURE IN HPA 783.9 779.4 782.0 784.2 783.9 779.5 777.2 779.6 787.0 786.4 785.6 782.0 787.0 DAY 10 20 19 29 15 9 3 23 23 10 2 28 MIN. QFE PRESSURE IN HPA 771.2 767.3 767.8 773.8 773.9 772.4 772.8 774.0 776.6 780.2 773.2 767.9 767.3 DAY 26 12 12 3 1 29 8 2 1 3 26 4 MEAN QNH PRESSURE IN HPA 1015.7 1012.3 1014.7 1017.8 1017.5 1013.4 1012.1 1014.4 1020.2 1022.1 1018.4 1016.1 1016.2 MAX. QNH PRESSURE IN HPA 1023.2 1017.6 1020.8 1023.5 1023.2 1017.7 1014.8 1017.8 1027.0 1026.3 1025.3 1020.8 1027.0 DAY 10 20 19 29 15 9 3 23 23 10 2 28 MIN. QNH PRESSURE IN HPA 1007.4 1002.6 1003.2 1010.6 1010.8 1008.9 1009.4 1010.9 1014.1 1018.6 1009.9 1003.3 1002.6 DAY 26 12 12 3 1 29 8 2 1 3 26 4 MEAN QFF PRESSURE IN HPA 1017.5 1013.1 1011.5 1009.4 1005.4 996.1 991.3 995.1 1008.7 1014.7 1013.3 1017.5 1007.8 MAX. QFF PRESSURE IN HPA 1034.9 1025.2 1020.0 1018.3 1011.7 1001.9 996.1 1001.9 1020.5 1021.9 1020.7 1029.9 1034.9 DAY 28 20 18 6 15 8 3 23 23 11 20 8 MIN. QFF PRESSURE IN HPA 1003.5 997.9 998.6 1001.3 998.6 989.8 987.2 990.5 997.3 1007.4 1006.6 1000.0 987.2 DAY 16 12 12 27 1 22 21 4 2 3 5 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 778.7 775.9 777.9 780.1 779.6 776.2 775.0 777.1 782.0 783.6 780.8 779.2 778.8 MAX. QFE PRESSURE IN HPA 784.4 780.4 782.9 784.5 783.9 779.8 777.4 779.9 787.4 787.0 786.5 782.9 787.4 DAY 10 20 31 29 15 9 3 23 23 10 2 15 MIN. QFE PRESSURE IN HPA 770.6 769.2 769.2 774.1 774.1 772.2 772.8 774.1 777.0 780.8 774.7 768.4 768.4 DAY 16 12 12 3 1 29 8 2 1 3 26 4 MEAN QNH PRESSURE IN HPA 1016.7 1013.3 1015.7 1018.5 1017.8 1013.6 1012.1 1014.7 1020.9 1022.7 1019.3 1017.3 1016.9 MAX. QNH PRESSURE IN HPA 1023.8 1018.8 1021.9 1023.9 1023.2 1018.1 1015.1 1018.2 1027.5 1027.0 1026.4 1021.9 1027.5 DAY 10 20 31 29 15 9 3 23 23 10 2 15 MIN. QNH PRESSURE IN HPA 1006.6 1004.9 1004.9 1011.0 1011.0 1008.6 1009.4 1011.0 1014.6 1019.3 1011.7 1003.9 1003.9 DAY 16 12 12 3 1 29 8 2 1 3 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 777.5 774.9 777.1 779.2 779.0 775.4 774.1 776.0 780.9 782.2 779.5 778.0 777.8 MAX. QFE PRESSURE IN HPA 783.4 779.6 782.4 783.5 783.2 779.0 776.2 779.2 786.9 785.6 785.0 782.0 786.9 DAY 10 20 31 29 15 9 3 22 23 11 2 28 MIN. QFE PRESSURE IN HPA 768.1 769.3 768.6 773.6 773.7 771.5 772.0 773.1 775.7 779.0 774.0 767.9 767.9 DAY 16 12 12 3 1 29 7 2 1 3 26 4 MEAN QNH PRESSURE IN HPA 1015.2 1012.0 1014.8 1017.3 1017.0 1012.6 1010.9 1013.3 1019.4 1021.1 1017.8 1015.8 1015.6 MAX. QNH PRESSURE IN HPA 1022.5 1017.8 1021.3 1022.7 1022.3 1017.1 1013.6 1017.3 1026.9 1025.3 1024.5 1020.8 1026.9 DAY 10 20 31 29 15 9 3 22 23 11 2 28 MIN. QNH PRESSURE IN HPA 1003.5 1005.0 1004.2 1010.4 1010.5 1007.8 1008.4 1009.8 1013.0 1017.1 1010.9 1003.3 1003.3 DAY 16 12 12 3 1 29 7 2 1 3 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 776.8 774.3 776.0 778.1 778.2 774.5 773.0 774.7 779.8 781.5 779.1 777.5 777.0 MAX. QFE PRESSURE IN HPA 782.2 778.5 780.9 782.4 782.0 777.9 775.0 777.9 786.0 784.7 784.0 781.3 786.0 DAY 28 7 31 5 14 9 3 22 23 10 1 30 MIN. QFE PRESSURE IN HPA 766.1 769.4 767.1 773.0 773.3 771.0 770.8 771.9 774.2 778.4 774.0 767.0 766.1 DAY 16 12 12 3 1 29 21 1 1 3 25 4 MEAN QNH PRESSURE IN HPA 1014.3 1011.2 1013.4 1016.0 1016.0 1011.5 1009.7 1011.8 1018.1 1020.2 1017.3 1015.3 1014.6 MAX. QNH PRESSURE IN HPA 1021.1 1016.5 1019.4 1021.3 1020.8 1015.7 1012.1 1015.7 1025.8 1024.2 1023.3 1019.9 1025.8 DAY 28 7 31 5 14 9 3 22 23 10 1 30 MIN. QNH PRESSURE IN HPA 1001.1 1005.2 1002.3 1009.6 1010.0 1007.1 1006.9 1008.3 1011.1 1016.3 1010.9 1002.2 1001.1 DAY 16 12 12 3 1 29 21 1 1 3 25 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 777.6 775.1 776.6 778.4 778.5 774.8 773.2 775.0 780.2 782.1 779.8 778.2 777.5 MAX. QFE PRESSURE IN HPA 783.2 779.4 781.8 783.2 782.6 778.0 775.4 778.2 786.0 785.2 784.8 782.0 786.0 DAY 9 20 31 5 14 9 13 7 23 10 2 28 MIN. QFE PRESSURE IN HPA 769.5 771.2 768.2 773.1 774.0 771.7 771.0 771.7 774.7 779.0 772.7 767.8 767.8 DAY 16 11 12 2 1 28 21 1 1 3 25 4 MEAN QNH PRESSURE IN HPA 1015.3 1012.2 1014.1 1016.3 1016.5 1011.9 1009.9 1012.1 1018.6 1021.0 1018.1 1016.1 1015.2 MAX. QNH PRESSURE IN HPA 1022.3 1017.6 1020.6 1022.3 1021.5 1015.8 1012.6 1016.1 1025.8 1024.8 1024.3 1020.8 1025.8 DAY 9 20 31 5 14 9 13 7 23 10 2 28 MIN. QNH PRESSURE IN HPA 1005.3 1007.4 1003.7 1009.8 1010.9 1008.0 1007.1 1008.0 1011.7 1017.1 1009.3 1003.2 1003.2 DAY 16 11 12 2 1 28 21 1 1 3 25 4 MEAN QFF PRESSURE IN HPA 1017.1 1013.0 1010.8 1007.9 1004.3 994.6 989.1 992.7 1007.0 1013.5 1013.0 1017.5 1006.7 MAX. QFF PRESSURE IN HPA 1035.4 1022.2 1018.0 1019.6 1009.1 999.5 993.6 999.1 1018.5 1020.0 1021.2 1028.5 1035.4 DAY 28 20 18 5 8 8 17 22 23 10 19 7 MIN. QFF PRESSURE IN HPA 1003.3 1005.2 999.1 1000.6 999.1 990.3 983.8 987.5 994.8 1005.7 1004.0 997.4 983.8 DAY 16 12 12 30 1 22 21 1 2 3 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.0 2.8 6.3 11.0 16.4 21.6 26.9 25.4 20.4 13.9 8.9 -3.7 12.7 MINIMUN AIR TEMPERATURE (C) -5.1 -4.0 -2.3 2.6 6.1 8.5 13.0 11.0 7.2 2.3 -1.5 -11.6 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 22 14 14 2 0 0 0 0 0 0 11 28 91 DAYS WITH FREEZING MIN.<= 0 27 25 22 7 0 0 0 0 0 13 15 31 140 TEMPERATURE RECORDS LOWEST(C) -11.0 -9.8 -8.2 -4.6 1.0 4.8 8.2 8.2 1.8 -1.6 -14.0 -20.6 -20.6 DAY 23 26 28 1 10 1 2 11 23 18 28 14 MAXIMUM AIR TEMPERATURE (C) 8.3 7.5 11.1 15.6 21.2 26.9 32.3 31.6 26.4 20.3 14.8 2.4 18.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 30 30 0 0 0 0 63 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 9 9 TEMPERATURE RECORDS HIGHEST(C) 10.4 13.0 16.4 19.4 24.0 30.4 36.4 34.1 29.4 25.4 19.0 10.0 36.4 DAY 16 21 24 30 19 13 16 26 8 2 1 3 DIF. BETWEEN (MAX.-MIN.) (C) 13.4 11.5 13.4 13.0 15.1 18.4 19.3 20.6 19.2 18.0 16.3 14.0 16.0 MEAN DAILY TEMP. (MDT) (C) 1.6 1.7 4.4 9.1 13.6 17.7 22.7 21.3 16.8 11.3 6.7 -4.6 10.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.0 56.6 16.6 0.0 0.0 0.0 0.0 73.2 HEATING DEG. DAYS(BASE 18 0C) 509.5 455.9 422.8 266.9 135.4 29.5 0.0 0.0 41.6 208.6 339.4 699.4 3109.0 DEWPOINT (MEAN C) -8.7 -7.4 -6.1 -2.4 0.2 1.0 1.3 1.2 0.0 -2.2 -8.8 -9.3 -3.4 MIXING RATIO (G/KG) 2.70 2.98 3.32 4.31 5.25 5.48 5.54 5.65 5.06 4.33 2.69 2.60 4.16 VAPOUR PRESSURE (HPA) 3.37 3.69 4.12 5.35 6.52 6.79 6.83 6.99 6.28 5.40 3.35 3.23 5.16 SATURATION DEF. (HPA) 4.55 4.09 5.92 8.27 12.75 20.48 30.35 27.52 19.22 11.82 8.96 1.88 12.99 RELATIVE HUMIDITY (MEAN %) 47 52 46 43 38 30 21 22 27 37 30 68 38 RELATIVE HUMIDITY (MAX. %) 70 77 73 67 60 56 37 35 40 58 46 83 59 RELATIVE HUMIDITY (MIN. %) 28 34 30 29 25 17 14 17 21 25 20 53 26 RELATIVE HUMIDITY (MEAN% 03UTC) 68 75 71 66 59 56 37 35 40 59 45 81 58 RELATIVE HUMIDITY (MEAN% 09UTC) 36 40 36 34 27 21 15 18 22 28 23 58 30 RELATIVE HUMIDITY (MEAN% 15UTC) 43 48 41 39 37 25 17 19 25 33 27 71 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 16.6 44.3 18.0 37.4 27.5 8.0 0.0 0.0 0.0 7.4 0.0 46.9 206.1 DAYS WITH PRECIPITATION >=10 1 2 0 2 0 0 0 0 0 0 0 2 7 DAYS WITH PRECIPITATION >= 5 1 3 1 4 3 1 0 0 0 1 0 3 17 DAYS WITH PRECIPITATION >= 1 3 6 5 4 5 2 0 0 0 1 0 4 30 DAYS WITH PRECIPITATION 5 7 5 5 7 2 0 0 0 2 0 5 38 GREATEST DAILY PRECIPITATION 11.0 15.0 9.0 13.0 8.4 5.0 0.0 0.0 0.0 7.0 0.0 21.0 21.0 DAY 13 6 14 23 30 1 ** ** ** 22 ** 12 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 1 0 0 1 DAYS WITH SNOW OR SLEET 1 5 0 0 0 0 0 0 0 0 0 6 12 DAYS WITH DUST 0 0 1 1 0 0 0 0 3 1 0 0 6 WIND DIRECTION (PREVAILING) 270 225 225 270 270 270 225 90 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.0 8.2 7.1 8.5 7.9 7.2 8.6 6.7 8.4 7.9 9.3 6.9 8.1 PREVAILING WIND PERCENT 15.5 13.6 20.0 28.0 21.3 25.3 16.8 22.7 20.0 19.4 26.7 7.1 16.8 CALMS PERCENT OF WIND 67.7 50.7 41.9 27.3 47.1 44.0 38.1 46.8 45.3 50.3 50.7 83.2 49.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 154 150 155 150 155 1824 VECTOR WIND DIRECTION (MEAN) 249 212 251 238 257 253 179 77 251 256 250 246 241 VECTOR WIND MAGNITUDE(KNOTS) 2.5 2.5 2.8 4.0 2.4 2.7 1.6 2.0 1.9 1.5 3.3 0.4 1.8 WIND STEADINESES (MEAN %) 86.2 64.1 70.0 70.2 60.0 69.2 33.3 58.8 46.3 42.9 76.7 40.0 47.4 WIND SPEED (MEAN KNOTS) 2.9 3.9 4.0 5.7 4.0 3.9 4.8 3.4 4.1 3.5 4.3 1.0 3.8 FASTEST WIND DIRECTION 230 180 240 280 260 240 180 80 240 240 220 280 240 FASTEST WIND SPEED (KNOTS) 19 16 17 19 17 16 17 14 25 17 17 12 25 DAY 24 4 17 24 7 22 2 20 20 12 11 4 DAYS WITH SKY CLEAR (0-2)/8 20 13 14 7 10 27 29 25 25 25 21 13 229 DAYS WITH P.CLOUDY (3-6)/8 9 11 12 15 19 3 2 6 5 5 9 14 110 DAYS WITH CLOUDY (7-8)/8 2 4 5 8 2 0 0 0 0 1 0 4 26 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 1 2 3 DURATION OF SUNSHINE HOURS 260.5 210.4 248.5 ****** ****** ****** 381.8 355.4 312.6 315.6 277.1 188.2 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 779.0 775.9 776.8 777.7 780.0 776.9 774.5 777.6 779.3 781.0 780.0 778.1 778.1 MAX. QFE PRESSURE IN HPA 785.4 781.8 783.4 782.1 784.1 781.7 778.1 781.8 785.5 786.8 785.5 781.9 786.8 DAY-HOUR 7- 6 1- 6 3- 6 11- 6 3- 9 9- 6 4- 3 25- 6 13- 6 27- 6 16- 6 23- 6 MIN. QFE PRESSURE IN HPA 773.9 768.4 771.8 772.2 774.9 773.0 770.8 774.5 775.2 775.8 773.1 773.0 768.4 DAY-HOUR 25-12 23-12 27- 3 24-12 14-12 22-12 2-12 22-12 4-12 15-12 25-15 4- 9 MEAN QNH PRESSURE IN HPA 1017.1 1013.3 1014.3 1015.4 1018.3 1014.5 1011.5 1015.4 1017.4 1019.5 1018.3 1015.9 1015.9 MAX. QNH PRESSURE IN HPA 1025.0 1020.6 1022.5 1020.9 1023.4 1020.4 1016.0 1020.6 1025.1 1026.8 1025.1 1020.7 1026.8 DAY-HOUR 7- 6 1- 6 3- 6 11- 6 3- 9 9- 6 4- 3 25- 6 13- 6 27- 6 16- 6 23- 6 MIN. QNH PRESSURE IN HPA 1010.8 1003.9 1008.1 1008.6 1012.0 1009.6 1006.9 1011.5 1012.4 1013.1 1009.8 1009.6 1003.9 DAY-HOUR 25-12 23-12 27- 3 24-12 14-12 22-12 2-12 22-12 4-12 15-12 25-15 4- 9 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 779.1 776.1 776.9 778.0 780.3 777.6 775.2 778.4 779.9 781.4 780.3 778.1 778.4 MAX. QFE PRESSURE IN HPA 784.4 780.4 782.2 781.3 784.0 781.2 778.1 781.2 785.0 786.0 785.0 781.0 786.0 DAY 7 1 3 4 27 9 4 25 13 27 16 20 MIN. QFE PRESSURE IN HPA 774.9 771.0 771.8 772.8 776.5 775.0 772.0 776.2 777.5 777.1 773.2 773.8 771.0 DAY 22 5 27 24 11 14 2 23 5 13 26 4 MEAN QNH PRESSURE IN HPA 1017.2 1013.5 1014.4 1015.8 1018.7 1015.3 1012.3 1016.3 1018.2 1020.1 1018.7 1016.0 1016.4 MAX. QNH PRESSURE IN HPA 1023.8 1018.8 1021.1 1019.9 1023.3 1019.8 1016.0 1019.8 1024.5 1025.8 1024.5 1019.6 1025.8 DAY 7 1 3 4 27 9 4 25 13 27 16 20 MIN. QNH PRESSURE IN HPA 1012.0 1007.1 1008.1 1009.4 1014.0 1012.1 1008.4 1013.6 1015.2 1014.7 1009.9 1010.6 1007.1 DAY 22 5 27 24 11 14 2 23 5 13 26 4 MEAN QFF PRESSURE IN HPA 1017.9 1013.4 1011.9 1008.5 1006.9 999.2 992.2 998.2 1004.5 1012.3 1015.1 1023.5 1008.6 MAX. QFF PRESSURE IN HPA 1026.0 1021.0 1022.5 1015.4 1014.3 1008.8 997.5 1001.4 1010.6 1021.6 1026.4 1035.3 1035.3 DAY 7 14 3 1 27 1 4 11 22 27 28 21 MIN. QFF PRESSURE IN HPA 1009.0 1001.6 1002.0 1003.6 1001.4 990.8 986.9 994.5 997.6 1001.3 1007.3 1007.9 986.9 DAY 12 5 26 24 7 22 17 8 20 13 11 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 780.2 776.9 777.8 778.5 780.7 777.7 775.3 778.8 780.4 782.2 781.2 779.1 779.1 MAX. QFE PRESSURE IN HPA 785.4 781.8 783.4 782.1 783.9 781.7 778.1 781.8 785.5 786.8 785.5 781.9 786.8 DAY 7 1 3 11 27 9 4 25 13 27 16 23 MIN. QFE PRESSURE IN HPA 775.9 772.0 773.5 773.2 777.0 774.8 772.0 776.4 778.1 777.8 774.8 774.4 772.0 DAY 22 23 27 24 15 22 2 8 5 13 26 4 MEAN QNH PRESSURE IN HPA 1018.5 1014.5 1015.6 1016.4 1019.2 1015.5 1012.4 1016.8 1018.8 1021.0 1019.8 1017.2 1017.2 MAX. QNH PRESSURE IN HPA 1025.0 1020.6 1022.5 1020.9 1023.2 1020.4 1016.0 1020.6 1025.1 1026.8 1025.1 1020.7 1026.8 DAY 7 1 3 11 27 9 4 25 13 27 16 23 MIN. QNH PRESSURE IN HPA 1013.2 1008.4 1010.3 1009.9 1014.6 1011.9 1008.4 1013.9 1016.0 1015.6 1011.9 1011.4 1008.4 DAY 22 23 27 24 15 22 2 8 5 13 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 778.7 775.9 777.0 777.8 780.1 777.0 774.6 777.8 779.2 780.8 779.7 777.9 778.0 MAX. QFE PRESSURE IN HPA 784.1 780.8 782.2 781.4 784.1 780.9 777.2 781.0 784.0 785.0 784.0 781.0 785.0 DAY 7 1 3 13 3 9 28 25 13 27 15 30 MIN. QFE PRESSURE IN HPA 774.9 770.0 773.3 773.0 776.0 774.0 771.3 775.7 776.9 776.8 773.2 773.0 770.0 DAY 22 23 18 24 10 22 2 8 5 14 26 4 MEAN QNH PRESSURE IN HPA 1016.7 1013.3 1014.6 1015.6 1018.5 1014.6 1011.6 1015.6 1017.4 1019.3 1018.0 1015.7 1015.9 MAX. QNH PRESSURE IN HPA 1023.4 1019.3 1021.1 1020.1 1023.4 1019.4 1014.8 1019.6 1023.3 1024.5 1023.3 1019.6 1024.5 DAY 7 1 3 13 3 9 28 25 13 27 15 30 MIN. QNH PRESSURE IN HPA 1012.0 1005.9 1010.0 1009.6 1013.4 1010.9 1007.5 1013.0 1014.5 1014.4 1009.9 1009.6 1005.9 DAY 22 23 18 24 10 22 2 8 5 14 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 778.2 775.1 775.9 776.8 779.3 776.0 773.7 776.6 778.2 780.0 779.1 777.2 777.2 MAX. QFE PRESSURE IN HPA 783.4 780.1 781.1 780.7 784.0 780.0 776.5 779.8 782.8 784.1 783.3 780.0 784.1 DAY 7 1 3 13 26 1 28 25 13 26 15 23 MIN. QFE PRESSURE IN HPA 773.9 768.4 772.0 772.2 774.9 773.0 770.8 774.5 775.2 775.8 773.8 773.0 768.4 DAY 25 23 17 24 14 22 2 22 4 15 26 12 MEAN QNH PRESSURE IN HPA 1016.0 1012.2 1013.3 1014.4 1017.4 1013.4 1010.5 1014.1 1016.1 1018.3 1017.2 1014.8 1014.8 MAX. QNH PRESSURE IN HPA 1022.5 1018.4 1019.7 1019.2 1023.3 1018.3 1014.0 1018.1 1021.8 1023.4 1022.4 1018.3 1023.4 DAY 7 1 3 13 26 1 28 25 13 26 15 23 MIN. QNH PRESSURE IN HPA 1010.8 1003.9 1008.4 1008.6 1012.0 1009.6 1006.9 1011.5 1012.4 1013.1 1010.6 1009.6 1003.9 DAY 25 23 17 24 14 22 2 22 4 15 26 12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 778.9 775.8 776.4 777.3 779.6 776.3 773.7 776.6 778.7 780.5 779.8 778.1 777.6 MAX. QFE PRESSURE IN HPA 784.0 781.0 781.1 781.4 784.0 781.0 776.8 779.3 782.9 785.3 784.0 781.4 785.3 DAY 7 1 3 11 26 2 31 25 12 26 15 23 MIN. QFE PRESSURE IN HPA 774.2 770.0 772.0 772.2 775.0 773.3 770.8 774.5 775.4 776.2 773.1 774.9 770.0 DAY 25 23 17 24 14 22 16 22 4 14 25 12 MEAN QNH PRESSURE IN HPA 1017.0 1013.1 1013.8 1014.9 1017.9 1013.7 1010.5 1014.1 1016.7 1019.0 1018.1 1015.9 1015.4 MAX. QNH PRESSURE IN HPA 1023.3 1019.6 1019.7 1020.1 1023.3 1019.6 1014.4 1017.5 1021.9 1024.9 1023.3 1020.1 1024.9 DAY 7 1 3 11 26 2 31 25 12 26 15 23 MIN. QNH PRESSURE IN HPA 1011.1 1005.9 1008.4 1008.6 1012.1 1010.0 1006.9 1011.5 1012.6 1013.6 1009.8 1012.0 1005.9 DAY 25 23 17 24 14 22 16 22 4 14 25 12 MEAN QFF PRESSURE IN HPA 1017.7 1013.1 1011.1 1007.4 1006.1 997.4 990.3 995.7 1002.8 1011.1 1014.6 1023.5 1007.6 MAX. QFF PRESSURE IN HPA 1026.3 1019.6 1020.5 1013.6 1012.8 1008.9 995.1 998.9 1008.1 1020.9 1024.9 1036.3 1036.3 DAY 7 14 3 13 26 2 28 11 12 26 27 20 MIN. QFF PRESSURE IN HPA 1009.2 1004.9 1001.3 1003.4 1001.7 990.5 984.5 991.7 997.1 1003.1 1004.4 1010.2 984.5 DAY 11 23 17 23 9 22 16 22 5 13 25 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.8 3.5 4.9 11.8 17.8 23.5 23.0 23.6 21.0 13.7 6.9 4.2 12.3 MINIMUN AIR TEMPERATURE (C) -12.5 -2.3 -0.8 3.3 7.0 10.3 11.6 11.0 7.6 2.6 -2.4 -3.1 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 9 3 1 0 0 0 0 0 0 11 14 66 DAYS WITH FREEZING MIN.<= 0 30 22 16 9 0 0 0 0 0 11 24 24 136 TEMPERATURE RECORDS LOWEST(C) -26.8 -8.2 -6.4 -4.8 3.0 4.0 7.4 6.0 4.0 -3.4 -8.0 -8.4 -26.8 DAY 26 23 29 6 3 7 17 4 21 20 13 4 MAXIMUM AIR TEMPERATURE (C) -0.8 7.6 8.8 16.4 22.8 28.5 27.9 29.4 27.8 19.9 12.4 9.3 17.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 5 1 14 7 0 0 0 27 DAYS WITH MAXIMUM TEMP. <= 0 16 0 0 0 0 0 0 0 0 0 0 0 16 TEMPERATURE RECORDS HIGHEST(C) 7.0 14.0 16.4 21.2 28.4 30.4 30.0 31.4 30.8 26.8 20.4 14.0 31.4 DAY 4 10 30 23 31 25 3 10 10 1 5 5 DIF. BETWEEN (MAX.-MIN.) (C) 11.7 9.9 9.6 13.1 15.8 18.2 16.3 18.4 20.2 17.3 14.8 12.4 14.8 MEAN DAILY TEMP. (MDT) (C) -6.6 2.7 4.0 9.9 14.9 19.4 19.8 20.2 17.7 11.3 5.0 3.1 10.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 4.3 4.4 8.2 0.0 0.0 0.0 0.0 16.9 HEATING DEG. DAYS(BASE 18 0C) 763.9 444.8 434.0 244.3 96.7 4.3 1.4 2.3 25.0 209.0 389.7 461.5 3076.9 DEWPOINT (MEAN C) -10.5 -5.0 -4.5 -2.9 1.6 1.3 2.3 0.4 -2.4 -5.8 -6.1 -6.2 -3.2 MIXING RATIO (G/KG) 2.41 3.52 3.75 4.17 5.63 5.61 5.88 5.21 4.22 3.36 3.28 3.19 4.19 VAPOUR PRESSURE (HPA) 2.99 4.36 4.64 5.18 6.99 6.94 7.29 6.46 5.25 4.19 4.10 3.99 5.20 SATURATION DEF. (HPA) 1.47 3.78 4.30 9.25 14.36 23.23 21.89 24.23 21.50 12.60 6.60 4.66 12.32 RELATIVE HUMIDITY (MEAN %) 72 57 56 40 38 26 27 24 22 28 44 51 40 RELATIVE HUMIDITY (MAX. %) 81 77 78 64 65 45 45 40 36 46 61 74 59 RELATIVE HUMIDITY (MIN. %) 62 42 40 27 24 17 20 17 15 18 32 34 29 RELATIVE HUMIDITY (MEAN% 03UTC) 79 73 73 62 64 45 45 40 36 46 61 72 58 RELATIVE HUMIDITY (MEAN% 09UTC) 66 49 50 31 28 19 22 18 17 21 36 40 33 RELATIVE HUMIDITY (MEAN% 15UTC) 75 56 47 35 33 20 23 19 19 23 39 47 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 56.3 29.5 106.7 37.0 12.0 0.0 1.2 0.7 0.0 5.4 12.0 31.2 292.0 DAYS WITH PRECIPITATION >=10 3 0 4 1 0 0 0 0 0 0 0 1 9 DAYS WITH PRECIPITATION >= 5 4 3 7 2 1 0 0 0 0 1 1 2 21 DAYS WITH PRECIPITATION >= 1 8 7 12 3 5 0 0 0 0 1 3 3 42 DAYS WITH PRECIPITATION 10 10 13 3 5 0 2 2 0 2 3 4 54 GREATEST DAILY PRECIPITATION 15.0 9.0 23.0 28.0 5.0 0.0 0.8 0.4 0.0 5.0 8.0 23.0 28.0 DAY 6 5 13 15 12 ** 5 30 ** 10 28 23 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 10 7 5 0 0 0 0 0 0 0 1 2 25 DAYS WITH DUST 0 0 0 0 0 0 0 0 5 1 0 0 6 WIND DIRECTION (PREVAILING) 180 270 270 225 270 270 90 90 270 270 90 225 270 PREVAILING WIND SPEED(KNOTS) 8.0 7.3 8.6 10.2 7.8 9.4 8.0 6.5 7.3 10.4 4.7 6.9 8.3 PREVAILING WIND PERCENT 7.1 25.5 24.5 26.7 24.5 20.7 30.3 16.8 15.3 20.6 7.3 13.5 15.5 CALMS PERCENT OF WIND 74.2 35.2 32.9 24.7 49.0 40.0 32.9 51.6 49.3 49.0 79.3 65.8 48.7 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 172 227 228 237 259 246 71 75 244 254 254 226 233 VECTOR WIND MAGNITUDE(KNOTS) 0.7 3.5 4.5 4.8 2.9 2.0 3.4 1.2 1.1 2.4 0.1 1.5 1.5 WIND STEADINESES (MEAN %) 41.2 71.4 72.6 71.6 72.5 40.8 65.4 36.4 33.3 55.8 8.3 65.2 37.5 WIND SPEED (MEAN KNOTS) 1.7 4.9 6.2 6.7 4.0 4.9 5.2 3.3 3.3 4.3 1.2 2.3 4.0 FASTEST WIND DIRECTION 200 230 190 230 300 270 80 120 270 270 250 260 270 FASTEST WIND SPEED (KNOTS) 14 21 19 23 17 19 16 16 21 25 14 14 25 DAY 6 10 2 3 1 6 21 13 22 27 8 17 DAYS WITH SKY CLEAR (0-2)/8 8 7 5 12 10 25 17 18 29 27 14 13 185 DAYS WITH P.CLOUDY (3-6)/8 16 17 20 16 18 5 14 13 1 4 15 18 157 DAYS WITH CLOUDY (7-8)/8 7 5 6 2 3 0 0 0 0 0 1 0 24 DAYS WITH VISIBILITY =< 2 KM 2 0 0 0 0 0 0 0 0 0 1 1 4 DURATION OF SUNSHINE HOURS 174.5 204.5 200.3 277.4 322.6 363.4 334.8 319.8 319.5 323.9 211.5 247.9 3300.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.7 775.6 774.1 778.2 779.5 777.2 778.4 778.3 779.2 781.5 781.7 780.9 778.4 MAX. QFE PRESSURE IN HPA 783.2 782.9 780.0 783.2 784.1 781.9 784.0 782.8 786.2 787.6 788.5 786.5 788.5 DAY-HOUR 26- 6 8- 6 30- 6 8- 6 17- 6 3- 6 3- 6 30- 3 25- 6 2- 6 18- 6 28- 6 MIN. QFE PRESSURE IN HPA 767.4 765.1 768.4 773.7 776.2 772.6 773.3 774.3 773.0 775.8 776.8 776.0 765.1 DAY-HOUR 12-12 5- 3 13- 3 3- 9 29-12 19-12 6-12 7-12 21-12 5-12 28-12 15- 3 MEAN QNH PRESSURE IN HPA 1014.2 1012.9 1010.9 1016.1 1017.7 1014.9 1016.3 1016.2 1017.3 1020.1 1020.4 1019.5 1016.4 MAX. QNH PRESSURE IN HPA 1022.3 1021.9 1018.3 1022.3 1023.4 1020.7 1023.3 1021.8 1026.0 1027.8 1028.9 1026.4 1028.9 DAY-HOUR 26- 6 8- 6 30- 6 8- 6 17- 6 3- 6 3- 6 30- 3 25- 6 2- 6 18- 6 28- 6 MIN. QNH PRESSURE IN HPA 1002.7 999.8 1003.9 1010.5 1013.6 1009.1 1010.0 1011.2 1009.6 1013.1 1014.4 1013.4 999.8 DAY-HOUR 12-12 5- 3 13- 3 3- 9 29-12 19-12 6-12 7-12 21-12 5-12 28-12 15- 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 776.5 775.5 774.0 778.4 780.1 778.0 779.1 779.1 779.8 781.9 781.9 780.9 778.8 MAX. QFE PRESSURE IN HPA 781.9 781.4 779.5 782.2 783.3 781.4 783.9 782.8 784.9 787.1 787.9 785.0 787.9 DAY 26 8 30 8 18 3 4 30 25 2 19 28 MIN. QFE PRESSURE IN HPA 768.6 765.1 768.4 774.4 777.6 775.0 774.8 776.1 774.9 777.2 777.2 776.0 765.1 DAY 12 5 13 3 29 19 7 8 20 5 29 15 MEAN QNH PRESSURE IN HPA 1014.0 1012.7 1010.9 1016.4 1018.4 1015.8 1017.3 1017.2 1018.0 1020.6 1020.7 1019.4 1016.8 MAX. QNH PRESSURE IN HPA 1020.7 1020.1 1017.7 1021.1 1022.4 1020.1 1023.2 1021.8 1024.4 1027.1 1028.1 1024.5 1028.1 DAY 26 8 30 8 18 3 4 30 25 2 19 28 MIN. QNH PRESSURE IN HPA 1004.2 999.8 1003.9 1011.4 1015.3 1012.1 1011.9 1013.5 1012.0 1014.8 1014.8 1013.4 999.8 DAY 12 5 13 3 29 19 7 8 20 5 29 15 MEAN QFF PRESSURE IN HPA 1022.8 1011.6 1008.1 1008.7 1005.4 998.1 1000.1 1000.2 1004.3 1012.9 1018.3 1018.9 1009.1 MAX. QFF PRESSURE IN HPA 1045.0 1021.6 1018.7 1014.3 1010.1 1005.5 1004.9 1008.5 1012.2 1022.5 1028.7 1027.5 1045.0 DAY 26 24 29 7 8 8 4 31 26 19 19 4 MIN. QFF PRESSURE IN HPA 1008.6 999.4 1000.6 1000.5 997.4 994.1 994.4 994.7 997.6 1004.8 1010.4 1010.2 994.1 DAY 6 5 13 3 29 6 7 17 22 5 8 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 777.7 776.6 774.9 779.1 780.4 778.1 779.3 779.5 780.3 782.6 782.8 782.0 779.4 MAX. QFE PRESSURE IN HPA 783.2 782.9 780.0 783.2 784.1 781.9 784.0 782.8 786.2 787.6 788.5 786.5 788.5 DAY 26 8 30 8 17 3 3 30 25 2 18 28 MIN. QFE PRESSURE IN HPA 769.6 766.2 770.0 774.1 777.6 775.0 775.0 776.1 775.0 778.0 778.0 778.0 766.2 DAY 12 5 13 3 29 19 7 8 20 5 28 15 MEAN QNH PRESSURE IN HPA 1015.5 1014.1 1012.0 1017.2 1018.9 1016.0 1017.5 1017.7 1018.7 1021.6 1021.7 1020.9 1017.6 MAX. QNH PRESSURE IN HPA 1022.3 1021.9 1018.3 1022.3 1023.4 1020.7 1023.3 1021.8 1026.0 1027.8 1028.9 1026.4 1028.9 DAY 26 8 30 8 17 3 3 30 25 2 18 28 MIN. QNH PRESSURE IN HPA 1005.4 1001.2 1005.9 1011.0 1015.3 1012.1 1012.1 1013.5 1012.1 1015.8 1015.8 1015.8 1001.2 DAY 12 5 13 3 29 19 7 8 20 5 28 15 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 776.7 775.7 774.1 778.3 779.5 777.2 778.4 778.3 779.2 781.3 781.5 780.8 778.4 MAX. QFE PRESSURE IN HPA 782.0 782.5 779.6 782.1 783.4 781.0 783.7 781.6 785.1 786.4 787.2 785.1 787.2 DAY 26 8 31 8 17 3 3 30 25 2 18 28 MIN. QFE PRESSURE IN HPA 767.8 767.6 769.5 773.7 776.6 773.9 773.8 775.2 773.3 776.4 777.2 777.0 767.6 DAY 12 5 13 3 29 19 6 8 20 5 29 15 MEAN QNH PRESSURE IN HPA 1014.3 1013.0 1011.0 1016.2 1017.7 1014.8 1016.4 1016.2 1017.3 1019.9 1020.2 1019.3 1016.4 MAX. QNH PRESSURE IN HPA 1020.8 1021.4 1017.8 1020.9 1022.5 1019.6 1022.9 1020.3 1024.7 1026.3 1027.3 1024.7 1027.3 DAY 26 8 31 8 17 3 3 30 25 2 18 28 MIN. QNH PRESSURE IN HPA 1003.2 1002.9 1005.3 1010.5 1014.1 1010.8 1010.6 1012.4 1010.0 1013.9 1014.8 1014.6 1002.9 DAY 12 5 13 3 29 19 6 8 20 5 29 15 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 776.0 774.8 773.4 777.5 778.7 776.3 777.5 777.3 778.2 780.6 780.8 780.2 777.6 MAX. QFE PRESSURE IN HPA 781.2 781.8 778.5 781.2 782.3 779.9 782.6 780.2 784.0 785.2 786.9 784.8 786.9 DAY 26 8 31 8 17 3 3 29 25 2 18 28 MIN. QFE PRESSURE IN HPA 767.4 768.0 769.0 773.8 776.2 772.6 773.3 774.3 773.0 775.8 776.8 776.9 767.4 DAY 12 5 13 3 29 19 6 7 21 5 28 15 MEAN QNH PRESSURE IN HPA 1013.4 1011.9 1010.1 1015.2 1016.7 1013.7 1015.2 1015.0 1016.1 1019.1 1019.3 1018.6 1015.4 MAX. QNH PRESSURE IN HPA 1019.8 1020.6 1016.5 1019.8 1021.2 1018.2 1021.5 1018.6 1023.3 1024.8 1026.9 1024.3 1026.9 DAY 26 8 31 8 17 3 3 29 25 2 18 28 MIN. QNH PRESSURE IN HPA 1002.7 1003.4 1004.7 1010.6 1013.6 1009.1 1010.0 1011.2 1009.6 1013.1 1014.4 1014.5 1002.7 DAY 12 5 13 3 29 19 6 7 21 5 28 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.6 775.5 773.9 777.8 779.0 776.6 777.7 777.4 778.6 781.1 781.4 780.8 778.0 MAX. QFE PRESSURE IN HPA 781.3 782.6 779.1 782.2 782.3 779.7 782.5 781.2 784.0 785.6 787.9 785.1 787.9 DAY 2 8 30 8 17 3 3 30 25 2 18 28 MIN. QFE PRESSURE IN HPA 768.0 769.9 769.8 774.3 776.8 773.0 774.0 774.3 774.1 776.2 776.8 777.6 768.0 DAY 12 5 13 10 9 19 6 7 20 5 28 15 MEAN QNH PRESSURE IN HPA 1014.1 1012.7 1010.8 1015.7 1017.1 1014.1 1015.4 1015.1 1016.5 1019.6 1020.1 1019.3 1015.9 MAX. QNH PRESSURE IN HPA 1019.9 1021.5 1017.2 1021.1 1021.2 1018.0 1021.4 1019.8 1023.3 1025.3 1028.1 1024.7 1028.1 DAY 2 8 30 8 17 3 3 30 25 2 18 28 MIN. QNH PRESSURE IN HPA 1003.4 1005.8 1005.7 1011.2 1014.4 1009.6 1010.9 1011.2 1011.0 1013.6 1014.4 1015.3 1003.4 DAY 12 5 13 10 9 19 6 7 20 5 28 15 MEAN QFF PRESSURE IN HPA 1022.7 1011.6 1007.9 1007.8 1004.0 996.3 998.2 998.1 1002.6 1012.0 1017.8 1018.8 1008.1 MAX. QFF PRESSURE IN HPA 1043.4 1020.3 1014.2 1014.5 1012.7 1003.1 1003.1 1006.5 1010.3 1020.4 1027.7 1026.0 1043.4 DAY 26 23 28 8 7 7 3 30 26 19 19 3 MIN. QFF PRESSURE IN HPA 1007.8 1002.7 1002.1 1001.4 997.7 992.0 994.1 992.4 996.7 1003.7 1011.5 1010.2 992.0 DAY 6 10 12 10 29 19 11 17 19 5 28 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.8 1.6 3.6 9.8 16.4 22.2 27.5 25.9 20.5 14.7 5.5 -1.0 12.2 MINIMUN AIR TEMPERATURE (C) -7.9 -5.9 -2.9 1.4 5.6 9.4 14.4 11.9 7.3 4.3 -1.6 -8.0 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 22 17 11 5 0 0 0 0 0 0 10 21 86 DAYS WITH FREEZING MIN.<= 0 30 24 29 9 2 0 0 0 0 5 22 30 151 TEMPERATURE RECORDS LOWEST(C) -24.0 -16.0 -10.0 -5.8 -1.8 4.0 8.2 7.0 2.2 -2.0 -6.8 -22.6 -24.0 DAY 20 8 1 12 6 5 7 30 10 25 30 22 MAXIMUM AIR TEMPERATURE (C) 4.1 6.2 7.9 14.7 21.2 27.4 33.2 32.1 26.6 20.1 10.1 4.1 17.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 2 26 25 0 0 0 0 53 DAYS WITH MAXIMUM TEMP. <= 0 7 1 0 0 0 0 0 0 0 0 0 7 15 TEMPERATURE RECORDS HIGHEST(C) 10.8 14.0 14.4 21.8 26.6 30.2 35.4 34.4 29.8 24.2 14.8 12.0 35.4 DAY 7 21 2 27 27 30 30 1 1 5 2 8 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 12.1 10.8 13.3 15.6 18.0 18.8 20.2 19.3 15.8 11.7 12.1 15.0 MEAN DAILY TEMP. (MDT) (C) -1.9 0.2 2.5 8.0 13.4 18.4 23.8 22.0 17.0 12.2 4.2 -2.0 9.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 2.1 92.4 41.3 0.0 0.0 0.0 0.0 135.8 HEATING DEG. DAYS(BASE 18 0C) 617.2 499.2 481.3 299.0 143.1 13.6 0.0 0.0 37.8 180.9 412.5 619.0 3303.7 DEWPOINT (MEAN C) -9.1 -11.8 -8.0 -3.3 0.5 3.1 6.3 3.9 0.6 0.1 -3.4 -10.0 -2.6 MIXING RATIO (G/KG) 2.61 2.12 2.91 4.11 5.19 6.33 7.92 6.69 5.29 5.12 3.93 2.43 4.55 VAPOUR PRESSURE (HPA) 3.25 2.64 3.60 5.10 6.45 7.83 9.74 8.28 6.58 6.39 4.89 3.02 5.65 SATURATION DEF. (HPA) 3.10 4.71 4.60 7.71 13.28 20.24 29.16 27.41 19.20 11.48 4.62 3.20 12.39 RELATIVE HUMIDITY (MEAN %) 58 39 48 45 37 31 27 25 28 39 56 55 41 RELATIVE HUMIDITY (MAX. %) 76 55 68 70 59 51 39 34 39 55 80 73 58 RELATIVE HUMIDITY (MIN. %) 44 28 31 30 26 21 21 20 21 29 39 39 29 RELATIVE HUMIDITY (MEAN% 03UTC) 74 54 64 69 59 51 39 34 39 54 79 69 57 RELATIVE HUMIDITY (MEAN% 09UTC) 51 31 42 34 29 24 23 22 24 32 45 48 34 RELATIVE HUMIDITY (MEAN% 15UTC) 55 34 42 41 32 27 23 21 24 36 51 52 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 22.1 0.6 45.3 58.2 7.4 7.0 0.0 0.0 0.0 2.0 13.6 56.2 212.4 DAYS WITH PRECIPITATION >=10 1 0 1 3 0 0 0 0 0 0 0 2 7 DAYS WITH PRECIPITATION >= 5 2 0 2 4 1 1 0 0 0 0 2 4 16 DAYS WITH PRECIPITATION >= 1 3 0 6 8 2 2 0 0 0 2 2 7 32 DAYS WITH PRECIPITATION 5 1 11 9 3 3 0 0 0 2 5 8 47 GREATEST DAILY PRECIPITATION 15.0 0.6 25.0 17.0 5.0 5.0 0.0 0.0 0.0 1.0 6.0 22.0 25.0 DAY 17 21 29 7 5 23 ** ** ** 21 5 21 DAY WITH THUNDER STORM 0 0 0 0 0 1 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 4 0 9 1 0 0 0 0 0 0 3 7 24 DAYS WITH DUST 0 0 0 1 0 1 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 270 225 270 270 270 270 270 90 270 270 180 270 270 PREVAILING WIND SPEED(KNOTS) 8.1 7.9 9.3 10.1 9.0 9.8 6.3 7.5 8.4 8.5 9.5 6.6 8.6 PREVAILING WIND PERCENT 20.6 33.6 37.4 27.3 26.5 28.0 13.5 27.7 31.3 35.5 11.3 13.5 21.8 CALMS PERCENT OF WIND 63.9 32.9 23.9 28.0 29.7 36.7 46.5 45.2 36.0 38.1 62.0 69.0 42.7 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 238 229 234 251 251 263 218 79 265 266 187 239 242 VECTOR WIND MAGNITUDE(KNOTS) 2.4 4.7 5.7 4.2 2.6 2.5 1.6 2.5 2.8 3.3 1.4 1.5 2.4 WIND STEADINESES (MEAN %) 77.4 83.9 77.0 62.7 43.3 42.4 40.0 64.1 58.3 68.7 51.9 75.0 51.1 WIND SPEED (MEAN KNOTS) 3.1 5.6 7.4 6.7 6.0 5.9 4.0 3.9 4.8 4.8 2.7 2.0 4.7 FASTEST WIND DIRECTION 170 180 240 250 230 280 190 90 270 270 190 270 240 FASTEST WIND SPEED (KNOTS) 19 17 29 21 17 27 16 14 16 17 16 16 29 DAY 16 26 20 10 4 17 4 12 13 2 3 9 DAYS WITH SKY CLEAR (0-2)/8 14 20 8 7 8 16 14 28 27 11 6 14 173 DAYS WITH P.CLOUDY (3-6)/8 15 8 19 22 22 14 17 3 3 19 19 15 176 DAYS WITH CLOUDY (7-8)/8 2 0 4 1 1 0 0 0 0 1 5 2 16 DAYS WITH VISIBILITY =< 2 KM 3 0 1 0 1 0 0 0 0 0 1 5 11 DURATION OF SUNSHINE HOURS 213.3 262.9 249.9 256.8 312.0 332.2 328.6 365.4 341.8 270.1 178.7 215.1 3326.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.7 776.0 773.7 777.1 779.8 777.7 774.9 778.1 781.0 782.5 779.9 777.7 777.9 MAX. QFE PRESSURE IN HPA 783.1 783.2 783.1 781.6 784.0 782.2 778.5 781.9 786.0 787.1 787.2 783.2 787.2 DAY-HOUR 7- 6 17- 6 11- 6 23- 6 12- 6 11- 6 28- 6 10- 6 19- 6 9- 6 8- 6 28- 6 MIN. QFE PRESSURE IN HPA 767.1 771.1 765.1 770.9 772.3 771.1 770.6 773.1 777.2 778.0 775.8 771.0 765.1 DAY-HOUR 17-12 1- 3 29- 9 11- 3 5-12 30-12 16-12 5-12 2-12 23-12 19-12 10- 9 MEAN QNH PRESSURE IN HPA 1014.2 1013.3 1010.5 1014.7 1018.0 1015.5 1012.0 1016.0 1019.5 1021.4 1018.2 1015.5 1015.7 MAX. QNH PRESSURE IN HPA 1022.2 1022.3 1022.2 1020.3 1023.3 1021.1 1016.5 1020.7 1025.8 1027.1 1027.3 1022.3 1027.3 DAY-HOUR 7- 6 17- 6 11- 6 23- 6 12- 6 11- 6 28- 6 10- 6 19- 6 9- 6 8- 6 28- 6 MIN. QNH PRESSURE IN HPA 1002.3 1007.3 999.8 1007.0 1008.8 1007.3 1006.6 1009.8 1014.8 1015.8 1013.1 1007.1 999.8 DAY-HOUR 17-12 1- 3 29- 9 11- 3 5-12 30-12 16-12 5-12 2-12 23-12 19-12 10- 9 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 776.7 775.6 773.5 777.2 780.3 778.3 775.5 778.8 781.5 782.9 780.1 777.6 778.2 MAX. QFE PRESSURE IN HPA 781.7 782.0 781.7 780.9 783.5 782.0 778.4 781.0 785.1 786.2 786.4 781.8 786.4 DAY 7 17 11 24 12 11 29 10 19 9 8 28 MIN. QFE PRESSURE IN HPA 768.0 771.1 767.1 770.9 774.0 773.4 771.9 774.9 778.4 779.0 776.9 771.2 767.1 DAY 17 1 25 11 5 30 16 5 13 24 13 10 MEAN QNH PRESSURE IN HPA 1014.2 1012.9 1010.2 1014.8 1018.7 1016.2 1012.7 1016.8 1020.2 1021.9 1018.5 1015.3 1016.0 MAX. QNH PRESSURE IN HPA 1020.4 1020.8 1020.4 1019.4 1022.7 1020.8 1016.3 1019.6 1024.7 1026.0 1026.3 1020.6 1026.3 DAY 7 17 11 24 12 11 29 10 19 9 8 28 MIN. QNH PRESSURE IN HPA 1003.4 1007.3 1002.3 1007.0 1010.9 1010.1 1008.3 1012.0 1016.3 1017.1 1014.5 1007.4 1002.3 DAY 17 1 25 11 5 30 16 5 13 24 13 10 MEAN QFF PRESSURE IN HPA 1018.2 1014.9 1009.3 1008.8 1007.2 1000.0 992.2 998.3 1006.6 1012.8 1016.5 1019.4 1008.7 MAX. QFF PRESSURE IN HPA 1038.8 1026.3 1021.4 1017.3 1014.7 1004.9 996.1 1003.8 1011.3 1016.8 1024.1 1038.3 1038.8 DAY 20 8 11 14 6 5 26 30 19 25 8 23 MIN. QFF PRESSURE IN HPA 1002.8 1004.2 997.2 1000.4 1000.5 992.8 986.4 991.6 1000.4 1006.1 1009.1 1003.3 986.4 DAY 16 22 25 10 22 30 12 5 3 7 12 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 777.7 776.8 774.4 777.8 780.7 778.6 775.8 779.2 782.1 783.5 781.0 778.7 778.9 MAX. QFE PRESSURE IN HPA 783.1 783.2 783.1 781.6 784.0 782.2 778.5 781.9 786.0 787.1 787.2 783.2 787.2 DAY 7 17 11 23 12 11 28 10 19 9 8 28 MIN. QFE PRESSURE IN HPA 769.0 772.0 765.4 771.1 774.8 774.0 772.0 775.1 779.2 780.0 777.8 772.2 765.4 DAY 17 27 29 11 5 24 16 5 13 23 13 10 MEAN QNH PRESSURE IN HPA 1015.5 1014.4 1011.4 1015.6 1019.2 1016.6 1013.1 1017.3 1020.9 1022.7 1019.5 1016.7 1016.9 MAX. QNH PRESSURE IN HPA 1022.2 1022.3 1022.2 1020.3 1023.3 1021.1 1016.5 1020.7 1025.8 1027.1 1027.3 1022.3 1027.3 DAY 7 17 11 23 12 11 28 10 19 9 8 28 MIN. QNH PRESSURE IN HPA 1004.7 1008.4 1000.2 1007.3 1011.9 1010.9 1008.4 1012.2 1017.3 1018.3 1015.6 1008.6 1000.2 DAY 17 27 29 11 5 24 16 5 13 23 13 10 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 776.7 776.2 773.9 777.2 779.9 777.8 775.1 778.3 781.0 782.3 779.7 777.5 778.0 MAX. QFE PRESSURE IN HPA 781.8 781.8 782.0 781.0 782.9 781.8 777.9 781.0 784.4 786.0 786.0 782.0 786.0 DAY 12 17 11 23 12 14 28 10 19 9 8 28 MIN. QFE PRESSURE IN HPA 768.0 771.3 765.1 771.1 773.2 772.2 771.0 774.1 778.2 778.8 776.8 771.0 765.1 DAY 17 10 29 11 5 30 16 5 13 23 13 10 MEAN QNH PRESSURE IN HPA 1014.3 1013.6 1010.7 1014.8 1018.2 1015.6 1012.2 1016.2 1019.6 1021.2 1018.0 1015.2 1015.8 MAX. QNH PRESSURE IN HPA 1020.6 1020.6 1020.8 1019.6 1021.9 1020.6 1015.7 1019.6 1023.8 1025.8 1025.8 1020.8 1025.8 DAY 12 17 11 23 12 14 28 10 19 9 8 28 MIN. QNH PRESSURE IN HPA 1003.4 1007.5 999.8 1007.3 1009.9 1008.6 1007.1 1011.0 1016.1 1016.8 1014.4 1007.1 999.8 DAY 17 10 29 11 5 30 16 5 13 23 13 10 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 775.9 775.5 773.1 776.3 778.9 776.8 774.1 777.1 779.9 781.5 779.0 777.1 777.1 MAX. QFE PRESSURE IN HPA 780.8 780.2 780.8 780.0 781.3 780.9 776.8 780.0 782.9 785.0 785.1 781.7 785.1 DAY 11 17 11 14 16 13 28 28 20 8 8 28 MIN. QFE PRESSURE IN HPA 767.1 771.2 765.1 771.0 772.3 771.1 770.6 773.1 777.2 778.0 775.8 771.7 765.1 DAY 17 27 29 5 5 30 16 5 2 23 19 10 MEAN QNH PRESSURE IN HPA 1013.2 1012.7 1009.7 1013.8 1016.9 1014.4 1011.1 1014.8 1018.2 1020.1 1017.1 1014.7 1014.7 MAX. QNH PRESSURE IN HPA 1019.3 1018.6 1019.3 1018.3 1019.9 1019.4 1014.4 1018.3 1021.9 1024.5 1024.7 1020.4 1024.7 DAY 11 17 11 14 16 13 28 28 20 8 8 28 MIN. QNH PRESSURE IN HPA 1002.3 1007.4 999.8 1007.1 1008.8 1007.3 1006.6 1009.8 1014.8 1015.8 1013.1 1008.0 999.8 DAY 17 27 29 5 5 30 16 5 2 23 19 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.5 775.9 773.7 776.8 779.2 777.1 774.2 777.1 780.3 782.2 779.7 777.8 777.5 MAX. QFE PRESSURE IN HPA 781.2 780.2 781.8 780.9 781.8 781.8 777.1 779.8 782.9 786.0 785.3 782.1 786.0 DAY 7 17 11 14 12 13 28 10 20 8 8 28 MIN. QFE PRESSURE IN HPA 768.1 771.8 765.8 771.0 774.5 771.1 771.1 773.1 777.8 778.8 776.8 772.6 765.8 DAY 17 27 29 10 5 30 2 5 2 23 19 9 MEAN QNH PRESSURE IN HPA 1013.9 1013.2 1010.5 1014.4 1017.3 1014.7 1011.2 1014.8 1018.7 1021.1 1017.9 1015.6 1015.3 MAX. QNH PRESSURE IN HPA 1019.8 1018.6 1020.6 1019.4 1020.6 1020.6 1014.7 1018.1 1021.9 1025.8 1024.9 1020.9 1025.8 DAY 7 17 11 14 12 13 28 10 20 8 8 28 MIN. QNH PRESSURE IN HPA 1003.5 1008.1 1000.7 1007.1 1011.5 1007.3 1007.3 1009.8 1015.6 1016.8 1014.4 1009.1 1000.7 DAY 17 27 29 10 5 30 2 5 2 23 19 9 MEAN QFF PRESSURE IN HPA 1018.0 1015.1 1009.4 1008.3 1005.6 998.3 990.2 995.9 1004.9 1011.9 1016.0 1019.7 1007.8 MAX. QFF PRESSURE IN HPA 1038.3 1023.7 1021.1 1016.2 1013.1 1004.1 993.5 1002.0 1008.8 1015.9 1023.1 1041.0 1041.0 DAY 19 7 11 14 6 13 28 29 23 28 8 22 MIN. QFF PRESSURE IN HPA 1004.0 1003.2 998.6 1000.3 1000.4 988.6 985.0 989.1 999.7 1006.9 1008.3 1007.0 985.0 DAY 16 22 29 10 30 30 16 5 2 6 12 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 BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.1 1.6 6.8 13.3 18.4 23.4 26.1 25.2 21.5 15.0 10.2 8.4 13.9 MINIMUN AIR TEMPERATURE (C) -9.3 -4.2 -0.7 4.5 7.8 10.5 14.3 12.8 9.0 3.8 -1.0 -0.5 3.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 25 15 8 0 0 0 0 0 0 0 5 5 58 DAYS WITH FREEZING MIN.<= 0 30 23 16 4 0 0 0 0 0 2 24 16 115 TEMPERATURE RECORDS LOWEST(C) -22.0 -11.2 -9.0 -2.0 0.8 7.6 11.0 10.0 5.0 0.0 -4.8 -7.6 -22.0 DAY 15 17 4 7 3 18 22 28 8 16 25 6 MAXIMUM AIR TEMPERATURE (C) 1.5 5.7 11.2 18.0 23.1 28.5 31.4 30.7 27.7 21.3 17.1 14.6 19.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 12 23 19 5 0 0 0 59 DAYS WITH MAXIMUM TEMP. <= 0 7 1 0 0 0 0 0 0 0 0 0 0 8 TEMPERATURE RECORDS HIGHEST(C) 6.0 10.8 19.8 24.0 27.6 31.2 36.0 34.2 31.0 27.0 20.0 20.0 36.0 DAY 4 7 28 15 28 29 11 18 2 4 18 10 DIF. BETWEEN (MAX.-MIN.) (C) 10.8 9.9 11.9 13.5 15.3 18.0 17.1 17.9 18.7 17.5 18.1 15.1 15.3 MEAN DAILY TEMP. (MDT) (C) -3.9 0.8 5.2 11.3 15.4 19.5 22.8 21.7 18.3 12.6 8.1 7.1 11.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.1 64.1 31.2 0.4 0.0 0.0 0.0 96.8 HEATING DEG. DAYS(BASE 18 0C) 678.9 482.1 396.0 201.7 81.8 4.0 0.0 0.0 13.8 169.0 298.1 339.4 2664.8 DEWPOINT (MEAN C) -11.5 -8.6 -6.5 -2.7 0.9 2.8 7.5 5.9 2.5 -1.9 -5.3 -6.7 -2.0 MIXING RATIO (G/KG) 2.22 2.77 3.34 4.24 5.34 6.13 8.52 7.66 6.09 4.39 3.43 3.15 4.77 VAPOUR PRESSURE (HPA) 2.75 3.44 4.15 5.26 6.63 7.60 10.50 9.48 7.57 5.48 4.28 3.94 5.92 SATURATION DEF. (HPA) 2.47 3.76 6.36 10.82 15.52 22.57 24.92 24.25 19.80 12.87 9.06 7.75 13.35 RELATIVE HUMIDITY (MEAN %) 55 51 43 36 33 28 32 31 31 35 36 38 37 RELATIVE HUMIDITY (MAX. %) 67 70 65 56 52 44 48 45 46 54 51 54 54 RELATIVE HUMIDITY (MIN. %) 43 37 29 25 23 20 25 24 22 23 24 25 27 RELATIVE HUMIDITY (MEAN% 03UTC) 64 69 63 53 52 44 48 45 46 53 51 54 54 RELATIVE HUMIDITY (MEAN% 09UTC) 47 44 34 28 27 22 27 26 25 28 30 33 31 RELATIVE HUMIDITY (MEAN% 15UTC) 54 46 39 32 27 23 27 25 27 30 29 32 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 56.3 71.8 111.5 3.6 5.0 0.0 1.0 0.0 0.6 36.0 0.0 5.9 291.7 DAYS WITH PRECIPITATION >=10 3 3 2 0 0 0 0 0 0 1 0 0 9 DAYS WITH PRECIPITATION >= 5 4 4 3 0 1 0 0 0 0 2 0 0 14 DAYS WITH PRECIPITATION >= 1 6 7 6 2 1 0 1 0 0 3 0 3 29 DAYS WITH PRECIPITATION 6 8 7 6 1 0 1 0 1 3 0 3 36 GREATEST DAILY PRECIPITATION 20.0 29.0 51.0 2.0 5.0 0.0 1.0 0.0 0.6 25.0 0.0 2.9 51.0 DAY 6 12 18 23 14 ** 19 ** 17 11 ** 3 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 1 0 0 1 DAYS WITH SNOW OR SLEET 5 4 0 0 0 0 0 0 0 0 0 0 9 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 270 225 225 270 90 90 90 270 270 90 270 270 PREVAILING WIND SPEED(KNOTS) 7.3 9.4 14.5 10.7 10.3 7.0 6.4 6.8 9.9 9.3 5.1 9.9 9.2 PREVAILING WIND PERCENT 16.8 25.7 26.5 24.0 31.0 19.3 16.1 30.3 27.3 27.7 28.0 30.3 21.4 CALMS PERCENT OF WIND 58.7 39.3 35.5 36.0 31.6 40.0 38.1 30.3 2.0 2.6 6.7 6.5 27.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 222 243 234 240 259 63 200 76 273 260 236 253 242 VECTOR WIND MAGNITUDE(KNOTS) 1.9 3.7 6.4 4.5 4.1 0.9 1.2 2.0 1.5 1.4 1.9 3.5 2.2 WIND STEADINESES (MEAN %) 59.4 68.5 83.1 75.0 64.1 22.0 27.3 41.7 17.9 18.4 30.6 48.6 36.7 WIND SPEED (MEAN KNOTS) 3.2 5.4 7.7 6.0 6.4 4.1 4.4 4.8 8.4 7.6 6.2 7.2 6.0 FASTEST WIND DIRECTION 190 220 260 210 230 20 190 120 280 280 260 290 260 FASTEST WIND SPEED (KNOTS) 19 19 39 21 29 17 16 16 17 21 17 21 39 DAY 12 8 25 23 14 21 8 14 6 8 16 21 DAYS WITH SKY CLEAR (0-2)/8 14 10 11 13 18 24 17 25 24 27 20 16 219 DAYS WITH P.CLOUDY (3-6)/8 14 13 14 15 13 6 14 6 6 3 10 15 129 DAYS WITH CLOUDY (7-8)/8 3 5 6 2 0 0 0 0 0 1 0 0 17 DAYS WITH VISIBILITY =< 2 KM 5 5 3 0 0 0 0 0 0 0 0 0 13 DURATION OF SUNSHINE HOURS 242.9 226.8 227.1 283.8 362.5 351.1 327.1 348.1 318.9 314.7 259.8 237.8 3500.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 774.9 776.0 776.4 778.2 779.0 779.3 777.0 779.8 780.4 782.2 782.6 782.4 779.0 MAX. QFE PRESSURE IN HPA 782.1 785.2 783.3 787.8 786.3 783.9 782.0 784.1 785.0 787.0 788.2 789.3 789.3 DAY-HOUR 22- 6 23- 6 28- 6 12- 6 8- 6 6- 6 20- 6 29- 6 29- 6 14- 6 21- 6 10- 6 MIN. QFE PRESSURE IN HPA 762.0 766.0 765.3 771.5 772.2 775.1 771.6 775.1 775.8 778.3 778.0 776.8 762.0 DAY-HOUR 13- 3 15-12 1-12 23- 3 30-12 30-12 8-15 22-12 4-12 3-12 1-12 21- 3 MEAN QNH PRESSURE IN HPA 1012.0 1013.4 1013.8 1016.0 1017.1 1017.5 1014.6 1018.0 1018.8 1021.1 1021.6 1021.3 1017.1 MAX. QNH PRESSURE IN HPA 1020.9 1024.8 1022.4 1028.0 1026.1 1023.2 1020.8 1023.4 1024.5 1027.0 1028.5 1029.9 1029.9 DAY-HOUR 22- 6 23- 6 28- 6 12- 6 8- 6 6- 6 20- 6 29- 6 29- 6 14- 6 21- 6 10- 6 MIN. QNH PRESSURE IN HPA 996.0 1000.9 1000.1 1007.8 1008.6 1012.2 1007.9 1012.2 1013.1 1016.2 1015.8 1014.4 996.0 DAY-HOUR 13- 3 15-12 1-12 23- 3 30-12 30-12 8-15 22-12 4-12 3-12 1-12 21- 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 774.6 775.9 776.3 778.2 779.4 779.9 777.6 780.4 780.9 782.6 782.9 782.4 779.2 MAX. QFE PRESSURE IN HPA 780.9 783.9 782.8 787.0 785.5 783.2 782.0 783.8 784.4 786.1 787.3 788.8 788.8 DAY 22 23 28 12 8 6 21 29 29 14 21 10 MIN. QFE PRESSURE IN HPA 762.0 766.6 768.0 771.5 773.0 777.1 772.2 777.0 777.1 779.8 780.3 776.8 762.0 DAY 13 16 2 23 30 30 9 22 4 4 1 21 MEAN QNH PRESSURE IN HPA 1011.6 1013.2 1013.8 1016.1 1017.5 1018.1 1015.3 1018.8 1019.5 1021.5 1021.9 1021.3 1017.4 MAX. QNH PRESSURE IN HPA 1019.4 1023.2 1021.8 1027.0 1025.1 1022.3 1020.8 1023.0 1023.8 1025.9 1027.4 1029.2 1029.2 DAY 22 23 28 12 8 6 21 29 29 14 21 10 MIN. QNH PRESSURE IN HPA 996.0 1001.7 1003.4 1007.8 1009.6 1014.7 1008.6 1014.6 1014.7 1018.1 1018.7 1014.4 996.0 DAY 13 16 2 23 30 30 9 22 4 4 1 21 MEAN QFF PRESSURE IN HPA 1017.2 1014.1 1010.2 1007.1 1004.1 1001.0 995.6 1000.3 1004.9 1012.6 1017.5 1017.5 1008.5 MAX. QFF PRESSURE IN HPA 1034.8 1028.8 1019.2 1020.1 1012.9 1005.8 1004.2 1004.9 1010.0 1019.8 1024.5 1028.8 1034.8 DAY 23 24 23 12 3 20 21 28 29 14 21 10 MIN. QFF PRESSURE IN HPA 999.3 1001.9 997.1 996.3 992.5 995.8 988.1 995.9 997.6 1004.3 1011.5 1007.2 988.1 DAY 13 12 30 24 30 30 8 22 4 1 16 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 775.7 776.9 777.2 779.0 779.9 780.2 777.9 780.8 781.4 783.3 783.8 783.4 780.0 MAX. QFE PRESSURE IN HPA 782.1 785.2 783.3 787.8 786.3 783.9 782.0 784.1 785.0 787.0 788.2 789.3 789.3 DAY 22 23 28 12 8 6 20 29 29 14 21 10 MIN. QFE PRESSURE IN HPA 763.0 768.1 768.7 772.2 772.9 777.0 772.8 777.0 777.3 780.0 780.9 777.1 763.0 DAY 13 16 1 24 30 9 8 22 4 1 1 21 MEAN QNH PRESSURE IN HPA 1013.0 1014.5 1014.8 1017.0 1018.2 1018.6 1015.7 1019.3 1020.1 1022.5 1023.1 1022.6 1018.3 MAX. QNH PRESSURE IN HPA 1020.9 1024.8 1022.4 1028.0 1026.1 1023.2 1020.8 1023.4 1024.5 1027.0 1028.5 1029.9 1029.9 DAY 22 23 28 12 8 6 20 29 29 14 21 10 MIN. QNH PRESSURE IN HPA 997.2 1003.5 1004.3 1008.6 1009.5 1014.6 1009.4 1014.6 1015.0 1018.3 1019.4 1014.7 997.2 DAY 13 16 1 24 30 9 8 22 4 1 1 21 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 774.9 776.1 776.5 778.3 779.3 779.5 777.1 780.0 780.5 782.2 782.6 782.1 779.1 MAX. QFE PRESSURE IN HPA 781.7 784.7 783.2 787.1 785.7 783.0 781.7 783.0 783.7 786.0 787.0 787.8 787.8 DAY 22 23 28 12 8 6 22 28 26 14 21 9 MIN. QFE PRESSURE IN HPA 763.0 767.0 767.0 772.7 772.6 776.1 772.0 776.0 776.7 779.0 779.3 776.9 763.0 DAY 13 15 1 21 30 9 8 22 4 4 1 21 MEAN QNH PRESSURE IN HPA 1012.0 1013.5 1014.0 1016.3 1017.4 1017.7 1014.7 1018.3 1019.0 1021.1 1021.6 1020.9 1017.2 MAX. QNH PRESSURE IN HPA 1020.4 1024.2 1022.3 1027.1 1025.4 1022.0 1020.4 1022.0 1022.9 1025.8 1027.0 1028.0 1028.0 DAY 22 23 28 12 8 6 22 28 26 14 21 9 MIN. QNH PRESSURE IN HPA 997.2 1002.2 1002.2 1009.3 1009.1 1013.5 1008.4 1013.4 1014.2 1017.1 1017.5 1014.5 997.2 DAY 13 15 1 21 30 9 8 22 4 4 1 21 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 774.4 775.3 775.7 777.5 778.3 778.5 776.2 778.9 779.4 781.3 781.6 781.6 778.2 MAX. QFE PRESSURE IN HPA 780.9 783.3 782.2 785.8 784.6 781.9 780.7 782.1 782.9 785.0 786.0 787.1 787.1 DAY 22 23 28 12 8 5 19 29 26 14 21 9 MIN. QFE PRESSURE IN HPA 764.5 766.0 765.3 772.1 772.2 775.1 771.7 775.1 775.8 778.3 778.0 776.9 764.5 DAY 13 15 1 5 30 30 8 22 4 3 1 21 MEAN QNH PRESSURE IN HPA 1011.3 1012.5 1013.0 1015.3 1016.2 1016.5 1013.6 1017.0 1017.6 1019.9 1020.3 1020.3 1016.1 MAX. QNH PRESSURE IN HPA 1019.4 1022.4 1021.1 1025.5 1024.0 1020.7 1019.2 1020.9 1021.9 1024.5 1025.8 1027.1 1027.1 DAY 22 23 28 12 8 5 19 29 26 14 21 9 MIN. QNH PRESSURE IN HPA 999.1 1000.9 1000.1 1008.5 1008.6 1012.2 1008.0 1012.2 1013.1 1016.2 1015.8 1014.5 999.1 DAY 13 15 1 5 30 30 8 22 4 3 1 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 775.0 775.9 776.3 777.8 778.4 778.6 776.5 778.9 779.6 781.8 782.3 782.4 778.6 MAX. QFE PRESSURE IN HPA 781.5 784.0 782.5 785.1 784.1 782.1 781.0 782.0 783.1 785.2 786.8 788.3 788.3 DAY 4 23 28 12 8 6 15 28 26 14 20 9 MIN. QFE PRESSURE IN HPA 766.0 767.0 767.0 772.0 774.0 775.1 771.6 775.6 776.0 778.6 778.9 777.3 766.0 DAY 12 15 1 23 30 30 8 22 4 3 1 31 MEAN QNH PRESSURE IN HPA 1012.1 1013.3 1013.7 1015.7 1016.4 1016.5 1013.9 1016.9 1017.9 1020.6 1021.1 1021.3 1016.6 MAX. QNH PRESSURE IN HPA 1020.2 1023.3 1021.4 1024.7 1023.4 1020.9 1019.6 1020.8 1022.2 1024.8 1026.8 1028.6 1028.6 DAY 4 23 28 12 8 6 15 28 26 14 20 9 MIN. QNH PRESSURE IN HPA 1000.9 1002.2 1002.2 1008.4 1010.9 1012.2 1007.9 1012.9 1013.4 1016.6 1017.0 1015.0 1000.9 DAY 12 15 1 23 30 30 8 22 4 3 1 31 MEAN QFF PRESSURE IN HPA 1017.7 1014.0 1010.1 1006.6 1002.7 999.2 993.9 998.1 1003.1 1011.7 1016.6 1017.5 1007.6 MAX. QFF PRESSURE IN HPA 1035.8 1028.3 1019.5 1017.2 1009.3 1004.8 1001.2 1003.5 1007.8 1018.2 1023.3 1028.3 1035.8 DAY 22 23 22 11 8 20 20 28 29 14 21 9 MIN. QFF PRESSURE IN HPA 1001.2 1003.6 998.3 995.7 994.9 993.6 986.8 993.8 996.4 1002.2 1011.1 1007.5 986.8 DAY 12 15 29 23 30 30 8 22 3 1 1 21 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 BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.2 3.6 4.9 12.8 19.6 25.0 25.9 25.0 21.8 15.6 8.6 4.2 13.9 MINIMUN AIR TEMPERATURE (C) -5.7 -3.7 -2.6 3.8 7.0 11.1 13.3 12.2 7.7 3.6 0.3 -4.9 3.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 22 15 13 1 0 0 0 0 0 0 7 19 77 DAYS WITH FREEZING MIN.<= 0 28 22 24 7 0 0 0 0 0 2 14 27 124 TEMPERATURE RECORDS LOWEST(C) -15.8 -18.0 -9.8 -5.0 2.6 6.8 10.0 9.8 2.2 -0.8 -12.0 -11.6 -18.0 DAY 27 7 15 11 2 16 29 28 26 21 30 6 MAXIMUM AIR TEMPERATURE (C) 4.5 8.3 9.2 17.6 25.1 30.3 31.3 30.2 28.3 21.5 13.5 10.9 19.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 18 22 25 9 0 0 0 76 DAYS WITH MAXIMUM TEMP. <= 0 3 0 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 12.0 12.4 18.8 21.8 30.4 32.6 35.4 31.8 31.0 24.8 17.8 16.8 35.4 DAY 6 8 31 27 31 27 4 14 4 1 19 30 DIF. BETWEEN (MAX.-MIN.) (C) 10.2 12.0 11.8 13.8 18.1 19.2 18.0 18.0 20.6 17.9 13.2 15.8 15.7 MEAN DAILY TEMP. (MDT) (C) -0.6 2.3 3.3 10.7 16.1 20.7 22.3 21.2 18.0 12.5 6.9 3.0 11.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 13.5 51.8 13.1 0.0 0.0 0.0 0.0 78.4 HEATING DEG. DAYS(BASE 18 0C) 576.8 438.9 456.0 218.7 68.5 0.0 0.0 0.0 29.1 169.2 333.0 465.0 2755.2 DEWPOINT (MEAN C) -6.9 -7.7 -6.8 -2.9 -0.1 1.5 4.2 2.5 -0.4 -2.2 -5.3 -8.1 -2.7 MIXING RATIO (G/KG) 3.07 2.94 3.16 4.13 5.02 5.62 6.82 5.97 4.94 4.35 3.57 2.82 4.37 VAPOUR PRESSURE (HPA) 3.82 3.65 3.91 5.13 6.23 6.97 8.41 7.41 6.13 5.43 4.44 3.53 5.42 SATURATION DEF. (HPA) 2.68 4.67 5.31 10.33 17.95 26.33 26.85 25.70 22.09 13.50 7.38 5.40 14.01 RELATIVE HUMIDITY (MEAN %) 62 49 48 36 28 23 27 24 24 32 41 47 37 RELATIVE HUMIDITY (MAX. %) 81 73 69 58 44 35 42 38 34 49 65 68 55 RELATIVE HUMIDITY (MIN. %) 46 30 35 26 20 17 19 18 18 22 25 30 26 RELATIVE HUMIDITY (MEAN% 03UTC) 75 67 66 56 44 34 41 38 34 49 61 67 53 RELATIVE HUMIDITY (MEAN% 09UTC) 58 41 42 28 23 19 23 19 20 25 31 39 31 RELATIVE HUMIDITY (MEAN% 15UTC) 57 45 44 33 23 19 22 21 20 28 37 40 32 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 31.4 53.2 87.7 2.6 0.0 0.0 4.0 0.0 0.0 0.6 7.0 24.4 210.9 DAYS WITH PRECIPITATION >=10 0 2 4 0 0 0 0 0 0 0 0 1 7 DAYS WITH PRECIPITATION >= 5 2 3 4 0 0 0 0 0 0 0 0 2 11 DAYS WITH PRECIPITATION >= 1 6 9 6 1 0 0 2 0 0 0 3 3 30 DAYS WITH PRECIPITATION 11 10 8 2 0 0 2 0 0 2 5 4 44 GREATEST DAILY PRECIPITATION 9.0 21.0 27.0 2.0 0.0 0.0 2.0 0.0 0.0 0.4 3.0 18.0 27.0 DAY 25 6 13 23 ** ** 13 ** ** 10 11 12 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 6 4 6 0 0 0 0 0 0 0 0 2 18 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 270 225 270 270 270 90 90 90 270 225 270 270 PREVAILING WIND SPEED(KNOTS) 7.8 10.2 9.2 10.7 10.0 11.3 9.5 7.5 5.0 8.0 8.0 6.7 9.3 PREVAILING WIND PERCENT 19.4 27.9 25.2 38.7 27.1 37.3 24.5 28.4 23.3 34.2 28.7 14.8 23.8 CALMS PERCENT OF WIND 5.2 7.1 15.5 8.7 1.9 7.3 7.7 29.0 14.7 12.3 14.7 43.9 14.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 206 239 225 252 261 259 133 69 229 279 238 235 242 VECTOR WIND MAGNITUDE(KNOTS) 2.0 4.3 3.7 6.1 2.5 5.3 1.2 2.9 1.5 2.2 4.1 1.1 2.3 WIND STEADINESES (MEAN %) 28.2 53.1 51.4 67.0 30.9 59.6 13.6 54.7 27.8 37.3 63.1 29.7 32.9 WIND SPEED (MEAN KNOTS) 7.1 8.1 7.2 9.1 8.1 8.9 8.8 5.3 5.4 5.9 6.5 3.7 7.0 FASTEST WIND DIRECTION 190 240 180 240 260 290 70 120 270 20 270 290 240 FASTEST WIND SPEED (KNOTS) 17 19 19 19 19 19 17 16 16 16 17 16 19 DAY 9 8 26 3 13 13 17 12 11 8 8 16 DAYS WITH SKY CLEAR (0-2)/8 9 14 12 11 27 30 25 21 28 28 16 19 240 DAYS WITH P.CLOUDY (3-6)/8 20 11 15 17 4 0 6 10 2 3 13 10 111 DAYS WITH CLOUDY (7-8)/8 2 3 4 2 0 0 0 0 0 0 1 2 14 DAYS WITH VISIBILITY =< 2 KM 2 2 3 0 0 0 0 0 0 0 0 2 9 DURATION OF SUNSHINE HOURS 161.5 207.0 231.2 271.2 368.4 388.6 367.1 324.4 327.2 304.3 252.2 241.6 3444.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.7 777.0 775.4 778.4 779.0 777.9 775.7 779.1 779.1 782.0 779.6 781.7 778.5 MAX. QFE PRESSURE IN HPA 782.3 782.1 783.4 783.0 786.4 783.9 780.3 784.8 784.9 786.0 784.9 786.9 786.9 DAY-HOUR 2- 6 12- 6 31- 6 30- 6 28- 6 2- 6 19- 3 20- 6 30- 6 11- 6 18- 6 6- 6 MIN. QFE PRESSURE IN HPA 770.0 766.9 767.0 772.0 773.3 770.9 771.9 773.8 775.0 778.0 774.1 775.9 766.9 DAY-HOUR 18-12 6- 3 2-12 8-12 20-12 24-12 12-12 14-15 15-12 31-12 12- 3 15-12 MEAN QNH PRESSURE IN HPA 1014.2 1014.6 1012.5 1016.4 1017.1 1015.7 1013.0 1017.2 1017.2 1020.9 1017.9 1020.4 1016.4 MAX. QNH PRESSURE IN HPA 1021.2 1020.9 1022.5 1022.0 1026.3 1023.2 1018.7 1024.3 1024.4 1025.8 1024.4 1026.9 1026.9 DAY-HOUR 2- 6 12- 6 31- 6 30- 6 28- 6 2- 6 19- 3 20- 6 30- 6 11- 6 18- 6 6- 6 MIN. QNH PRESSURE IN HPA 1005.9 1002.1 1002.2 1008.4 1010.0 1007.0 1008.3 1010.6 1012.1 1015.8 1011.0 1013.2 1002.1 DAY-HOUR 18-12 6- 3 2-12 8-12 20-12 24-12 12-12 14-15 15-12 31-12 12- 3 15-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 776.5 776.9 775.2 778.7 779.4 778.4 776.4 779.7 779.7 782.5 779.6 781.7 778.7 MAX. QFE PRESSURE IN HPA 781.2 780.8 782.9 782.8 785.8 783.5 780.3 784.1 783.8 785.0 783.3 785.9 785.9 DAY 12 12 31 26 28 2 19 20 30 11 18 6 MIN. QFE PRESSURE IN HPA 770.1 766.9 767.2 773.2 774.3 772.0 773.7 775.8 776.0 779.0 774.1 776.3 766.9 DAY 18 6 2 8 21 25 14 14 16 31 12 16 MEAN QNH PRESSURE IN HPA 1014.0 1014.5 1012.4 1016.7 1017.6 1016.4 1013.8 1018.0 1018.0 1021.5 1017.9 1020.5 1016.8 MAX. QNH PRESSURE IN HPA 1019.8 1019.3 1021.9 1021.8 1025.5 1022.7 1018.7 1023.4 1023.0 1024.5 1022.4 1025.6 1025.6 DAY 12 12 31 26 28 2 19 20 30 11 18 6 MIN. QNH PRESSURE IN HPA 1006.0 1002.1 1002.4 1009.9 1011.2 1008.4 1010.5 1013.1 1013.4 1017.1 1011.0 1013.7 1002.1 DAY 18 6 2 8 21 25 14 14 16 31 12 16 MEAN QFF PRESSURE IN HPA 1015.8 1014.0 1010.5 1008.2 1004.0 998.1 994.2 999.7 1003.3 1012.0 1013.0 1020.6 1007.8 MAX. QFF PRESSURE IN HPA 1027.5 1028.7 1018.0 1017.5 1011.2 1005.1 1002.2 1005.6 1011.9 1016.5 1024.2 1030.1 1030.1 DAY 27 7 19 11 2 1 29 20 30 30 30 6 MIN. QFF PRESSURE IN HPA 1004.9 1001.8 1001.7 997.2 995.5 987.1 989.2 993.8 997.4 1005.9 1003.8 1008.3 987.1 DAY 9 6 2 8 14 25 4 14 12 31 1 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 777.5 777.9 776.2 779.2 779.9 778.7 776.7 780.2 780.3 783.3 780.7 782.7 779.4 MAX. QFE PRESSURE IN HPA 782.3 782.1 783.4 783.0 786.4 783.9 780.1 784.8 784.9 786.0 784.9 786.9 786.9 DAY 2 12 31 30 28 2 19 20 30 11 18 6 MIN. QFE PRESSURE IN HPA 770.9 769.9 768.3 774.1 775.0 772.2 774.0 776.2 776.4 779.4 775.0 777.2 768.3 DAY 18 6 2 8 20 25 14 14 16 31 12 14 MEAN QNH PRESSURE IN HPA 1015.2 1015.8 1013.6 1017.4 1018.2 1016.8 1014.2 1018.6 1018.7 1022.4 1019.1 1021.7 1017.6 MAX. QNH PRESSURE IN HPA 1021.2 1020.9 1022.5 1022.0 1026.3 1023.2 1018.4 1024.3 1024.4 1025.8 1024.4 1026.9 1026.9 DAY 2 12 31 30 28 2 19 20 30 11 18 6 MIN. QNH PRESSURE IN HPA 1007.0 1005.8 1003.8 1011.0 1012.1 1008.6 1010.9 1013.6 1013.9 1017.6 1012.1 1014.8 1003.8 DAY 18 6 2 8 20 25 14 14 16 31 12 14 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 776.9 777.2 775.6 778.6 779.2 778.0 776.0 779.3 779.2 781.9 779.6 781.6 778.6 MAX. QFE PRESSURE IN HPA 782.0 781.7 782.6 782.8 785.5 783.0 779.1 783.5 783.8 784.8 783.9 786.0 786.0 DAY 2 12 31 30 28 1 19 19 30 11 15 6 MIN. QFE PRESSURE IN HPA 770.2 770.8 767.9 773.2 774.0 771.9 773.0 775.1 775.7 778.2 774.7 776.1 767.9 DAY 18 5 2 14 21 24 12 14 16 31 12 15 MEAN QNH PRESSURE IN HPA 1014.4 1014.9 1012.9 1016.6 1017.4 1015.8 1013.3 1017.5 1017.3 1020.7 1017.8 1020.3 1016.6 MAX. QNH PRESSURE IN HPA 1020.8 1020.4 1021.5 1021.8 1025.1 1022.0 1017.2 1022.7 1023.0 1024.3 1023.2 1025.8 1025.8 DAY 2 12 31 30 28 1 19 19 30 11 15 6 MIN. QNH PRESSURE IN HPA 1006.2 1006.9 1003.3 1009.9 1010.9 1008.3 1009.6 1012.2 1013.0 1016.1 1011.7 1013.5 1003.3 DAY 18 5 2 14 21 24 12 14 16 31 12 15 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 776.1 776.3 774.7 777.7 778.1 777.2 774.8 778.2 778.0 781.0 778.9 780.8 777.6 MAX. QFE PRESSURE IN HPA 781.7 780.8 781.2 781.0 784.0 782.2 777.2 782.0 782.8 784.0 783.0 785.0 785.0 DAY 2 12 31 30 28 1 19 19 30 11 15 6 MIN. QFE PRESSURE IN HPA 770.0 770.0 767.0 772.0 773.3 770.9 771.9 774.0 775.0 778.0 774.7 775.9 767.0 DAY 18 5 2 8 20 24 12 14 15 31 12 15 MEAN QNH PRESSURE IN HPA 1013.4 1013.7 1011.7 1015.5 1016.0 1014.8 1011.9 1016.0 1015.8 1019.6 1017.0 1019.3 1015.4 MAX. QNH PRESSURE IN HPA 1020.4 1019.3 1019.8 1019.6 1023.3 1021.1 1014.8 1020.8 1021.8 1023.3 1022.0 1024.5 1024.5 DAY 2 12 31 30 28 1 19 19 30 11 15 6 MIN. QNH PRESSURE IN HPA 1005.9 1005.9 1002.2 1008.4 1010.0 1007.0 1008.3 1010.9 1012.1 1015.8 1011.7 1013.2 1002.2 DAY 18 5 2 8 20 24 12 14 15 31 12 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.6 776.9 775.1 778.0 778.3 777.3 774.8 778.1 778.3 781.5 779.5 781.5 778.0 MAX. QFE PRESSURE IN HPA 782.0 780.7 781.2 781.4 784.5 782.5 778.3 782.0 783.0 784.0 783.1 785.0 785.0 DAY 2 12 31 21 28 1 28 19 30 11 15 6 MIN. QFE PRESSURE IN HPA 771.0 768.8 767.6 772.0 773.8 771.0 771.9 773.8 775.2 778.9 775.3 776.4 767.6 DAY 18 5 2 8 20 24 12 14 15 31 12 15 MEAN QNH PRESSURE IN HPA 1014.1 1014.5 1012.2 1015.9 1016.3 1015.0 1011.9 1015.9 1016.2 1020.1 1017.7 1020.2 1015.8 MAX. QNH PRESSURE IN HPA 1020.8 1019.2 1019.8 1020.1 1023.9 1021.4 1016.2 1020.8 1022.0 1023.3 1022.2 1024.5 1024.5 DAY 2 12 31 21 28 1 28 19 30 11 15 6 MIN. QNH PRESSURE IN HPA 1007.1 1004.4 1002.9 1008.4 1010.6 1007.1 1008.3 1010.6 1012.4 1017.0 1012.5 1013.9 1002.9 DAY 18 5 2 8 20 24 12 14 15 31 12 15 MEAN QFF PRESSURE IN HPA 1016.0 1013.9 1010.1 1007.4 1002.4 996.4 992.2 997.3 1001.2 1010.6 1013.0 1020.1 1006.7 MAX. QFF PRESSURE IN HPA 1026.2 1028.5 1016.2 1013.6 1009.4 1003.9 1001.8 1003.1 1010.2 1014.0 1024.9 1028.6 1028.6 DAY 26 7 7 11 1 1 28 20 30 28 30 6 MIN. QFF PRESSURE IN HPA 1004.2 1003.9 1001.4 996.9 995.1 988.9 988.2 991.1 996.6 1006.0 1005.3 1008.0 988.2 DAY 9 20 2 8 14 24 3 14 6 31 1 14 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 BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.2 -0.5 6.4 15.5 20.3 24.1 25.2 24.6 21.6 14.2 5.7 3.1 13.4 MINIMUN AIR TEMPERATURE (C) -6.4 -8.1 -2.0 5.4 7.2 9.8 12.3 11.6 8.3 3.3 -1.5 -2.9 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 22 10 0 0 0 0 0 0 0 7 14 70 DAYS WITH FREEZING MIN.<= 0 28 27 22 5 0 0 0 0 0 3 22 22 129 TEMPERATURE RECORDS LOWEST(C) -21.6 -20.8 -9.6 -3.0 0.2 6.4 6.2 9.2 4.6 -2.0 -7.4 -10.6 -21.6 DAY 31 10 17 2 13 2 21 23 29 20 27 17 MAXIMUM AIR TEMPERATURE (C) 5.0 4.7 11.4 20.2 25.8 29.9 30.3 30.5 27.5 20.1 10.4 7.7 18.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 18 17 22 3 0 0 0 61 DAYS WITH MAXIMUM TEMP. <= 0 2 7 0 0 0 0 0 0 0 0 0 0 9 TEMPERATURE RECORDS HIGHEST(C) 12.6 11.8 16.4 23.8 30.0 33.4 34.0 33.8 31.0 23.4 18.4 12.4 34.0 DAY 1 25 24 14 30 23 11 4 9 1 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.4 12.8 13.4 14.8 18.6 20.1 18.0 18.9 19.2 16.8 11.9 10.6 15.5 MEAN DAILY TEMP. (MDT) (C) -0.7 -1.7 4.7 12.8 16.5 19.8 21.3 21.1 17.9 11.7 4.4 2.4 10.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 6.1 40.7 15.4 0.9 0.0 0.0 0.0 63.1 HEATING DEG. DAYS(BASE 18 0C) 578.6 572.1 412.7 156.3 54.5 4.4 0.2 0.0 24.8 195.7 407.0 484.1 2890.4 DEWPOINT (MEAN C) -9.6 -9.6 -8.7 -1.7 -2.9 -2.0 0.1 -1.2 -3.2 -2.5 -3.6 -5.8 -4.2 MIXING RATIO (G/KG) 2.62 2.53 2.80 4.53 4.15 4.35 5.13 4.63 3.97 4.33 3.92 3.39 3.86 VAPOUR PRESSURE (HPA) 3.25 3.15 3.48 5.63 5.16 5.40 6.35 5.76 4.95 5.40 4.88 4.21 4.80 SATURATION DEF. (HPA) 3.34 3.30 6.68 12.84 20.06 26.52 27.34 26.98 22.52 11.78 4.78 3.76 14.16 RELATIVE HUMIDITY (MEAN %) 54 55 38 33 23 20 21 20 21 36 58 57 36 RELATIVE HUMIDITY (MAX. %) 74 74 59 51 38 35 34 34 35 60 83 80 55 RELATIVE HUMIDITY (MIN. %) 37 39 24 24 15 12 14 13 13 22 39 37 24 RELATIVE HUMIDITY (MEAN% 03UTC) 71 72 59 50 38 35 34 34 35 59 82 74 54 RELATIVE HUMIDITY (MEAN% 09UTC) 47 50 30 28 18 15 16 16 16 28 45 46 30 RELATIVE HUMIDITY (MEAN% 15UTC) 47 50 30 26 19 15 16 14 15 32 55 59 32 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 55.5 16.4 14.4 0.4 1.0 0.0 2.4 0.0 0.0 1.0 23.5 60.5 175.1 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 0 0 0 0 0 3 4 DAYS WITH PRECIPITATION >= 5 4 2 1 0 0 0 0 0 0 0 2 5 14 DAYS WITH PRECIPITATION >= 1 5 3 3 0 1 0 1 0 0 1 5 8 27 DAYS WITH PRECIPITATION 7 5 4 1 1 2 2 0 0 3 8 11 44 GREATEST DAILY PRECIPITATION 29.0 9.0 9.0 0.4 1.0 0.0 2.0 0.0 0.0 1.0 8.0 17.0 29.0 DAY 29 25 25 21 2 ** 15 ** ** 4 7 11 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 2 0 0 2 DAYS WITH SNOW OR SLEET 7 3 0 0 0 0 0 0 0 0 3 5 18 DAYS WITH DUST 0 0 2 0 1 0 0 2 1 2 0 0 8 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 90 90 270 270 270 225 270 PREVAILING WIND SPEED(KNOTS) 7.9 7.4 9.7 9.7 10.1 8.3 8.3 8.3 8.6 8.4 8.8 9.9 9.0 PREVAILING WIND PERCENT 21.9 20.7 34.8 36.7 46.5 14.0 22.6 23.9 20.0 25.8 14.0 25.8 21.5 CALMS PERCENT OF WIND 39.4 53.8 23.9 29.3 24.5 43.3 41.9 38.1 45.3 51.6 60.7 47.7 41.5 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 227 247 248 255 265 245 76 68 228 259 245 220 245 VECTOR WIND MAGNITUDE(KNOTS) 3.5 2.6 5.4 5.3 5.9 1.0 2.0 2.3 2.5 2.2 0.8 4.0 2.3 WIND STEADINESES (MEAN %) 71.4 78.8 72.0 77.9 85.5 21.7 45.5 46.9 55.6 56.4 26.7 80.0 46.0 WIND SPEED (MEAN KNOTS) 4.9 3.3 7.5 6.8 6.9 4.6 4.4 4.9 4.5 3.9 3.0 5.0 5.0 FASTEST WIND DIRECTION 210 180 210 230 260 270 100 110 200 300 160 220 210 FASTEST WIND SPEED (KNOTS) 17 16 29 25 19 19 17 14 17 16 16 17 29 DAY 26 7 23 10 1 12 13 1 3 12 2 1 DAYS WITH SKY CLEAR (0-2)/8 17 21 18 13 23 27 23 21 23 19 12 14 231 DAYS WITH P.CLOUDY (3-6)/8 11 6 9 16 7 3 8 10 7 10 10 14 111 DAYS WITH CLOUDY (7-8)/8 3 2 4 1 1 0 0 0 0 2 8 3 24 DAYS WITH VISIBILITY =< 2 KM 6 1 3 0 0 0 0 0 0 0 6 0 16 DURATION OF SUNSHINE HOURS 226.5 238.4 277.0 298.2 378.2 360.5 347.0 334.6 307.5 283.2 200.4 222.0 3473.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 775.5 776.4 776.3 779.6 778.7 776.9 778.1 779.0 779.6 781.8 780.6 778.5 778.4 MAX. QFE PRESSURE IN HPA 783.3 782.6 782.0 782.9 783.0 781.2 784.1 783.0 785.0 785.5 786.4 784.0 786.4 DAY-HOUR 31- 6 11- 6 21- 6 2- 6 6- 6 30- 6 30- 6 21- 6 29- 6 16- 6 17- 6 4- 6 MIN. QFE PRESSURE IN HPA 768.4 765.7 770.0 776.5 775.0 772.8 772.2 773.0 772.0 777.0 775.0 769.8 765.7 DAY-HOUR 28-12 7- 6 2- 3 6-12 17-12 26-12 11-12 30-12 1-12 2-12 6- 9 15- 9 MEAN QNH PRESSURE IN HPA 1012.7 1013.9 1013.7 1017.8 1016.7 1014.5 1015.9 1017.0 1017.9 1020.5 1019.0 1016.5 1016.3 MAX. QNH PRESSURE IN HPA 1022.4 1021.5 1020.8 1021.9 1022.0 1019.8 1023.4 1022.0 1024.5 1025.1 1026.3 1023.3 1026.3 DAY-HOUR 31- 6 11- 6 21- 6 2- 6 6- 6 30- 6 30- 6 21- 6 29- 6 16- 6 17- 6 4- 6 MIN. QNH PRESSURE IN HPA 1003.9 1000.6 1005.9 1014.0 1012.1 1009.4 1008.6 1009.6 1008.4 1014.6 1012.1 1005.7 1000.6 DAY-HOUR 28-12 7- 6 2- 3 6-12 17-12 26-12 11-12 30-12 1-12 2-12 6- 9 15- 9 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 775.5 776.1 776.3 779.7 779.1 777.5 778.7 779.6 780.2 782.1 780.6 778.4 778.6 MAX. QFE PRESSURE IN HPA 782.9 781.8 780.7 782.0 782.3 781.0 783.9 782.5 784.3 785.0 785.8 783.0 785.8 DAY 31 11 21 2 7 30 31 21 30 16 17 18 MIN. QFE PRESSURE IN HPA 768.9 766.0 770.0 777.3 776.8 774.2 773.3 774.0 774.0 777.4 775.5 770.2 766.0 DAY 17 7 2 22 20 26 12 31 1 2 22 15 MEAN QNH PRESSURE IN HPA 1012.7 1013.4 1013.8 1018.0 1017.2 1015.3 1016.7 1017.8 1018.6 1020.9 1019.1 1016.3 1016.6 MAX. QNH PRESSURE IN HPA 1021.9 1020.6 1019.2 1020.8 1021.2 1019.6 1023.2 1021.4 1023.7 1024.5 1025.5 1022.0 1025.5 DAY 31 11 21 2 7 30 31 21 30 16 17 18 MIN. QNH PRESSURE IN HPA 1004.5 1000.9 1005.9 1015.0 1014.4 1011.1 1010.0 1010.9 1010.9 1015.1 1012.7 1006.2 1000.9 DAY 17 7 2 22 20 26 12 31 1 2 22 15 MEAN QFF PRESSURE IN HPA 1015.2 1016.8 1010.9 1007.2 1002.8 997.8 998.0 1000.1 1003.8 1012.1 1016.9 1015.9 1008.1 MAX. QFF PRESSURE IN HPA 1036.2 1035.5 1018.6 1016.1 1009.6 1003.2 1006.6 1005.4 1011.1 1017.0 1024.2 1029.0 1036.2 DAY 31 11 4 2 3 18 31 21 29 6 17 17 MIN. QFF PRESSURE IN HPA 1004.6 999.8 1000.9 1001.2 997.3 991.7 988.1 993.5 995.3 1002.9 1009.1 1005.0 988.1 DAY 5 7 2 21 27 25 11 31 3 2 2 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 776.5 777.2 777.3 780.6 779.6 777.9 779.0 780.1 780.8 782.8 781.6 779.4 779.4 MAX. QFE PRESSURE IN HPA 783.3 782.6 782.0 782.9 783.0 781.2 784.1 783.0 785.0 785.5 786.4 784.0 786.4 DAY 31 11 21 2 6 30 30 21 29 16 17 4 MIN. QFE PRESSURE IN HPA 770.0 765.7 770.5 778.0 777.1 774.0 773.9 774.6 774.1 778.0 776.9 771.0 765.7 DAY 17 7 2 22 27 26 12 31 1 2 6 15 MEAN QNH PRESSURE IN HPA 1014.0 1014.9 1014.9 1019.0 1017.8 1015.7 1017.0 1018.5 1019.4 1021.8 1020.3 1017.6 1017.6 MAX. QNH PRESSURE IN HPA 1022.4 1021.5 1020.8 1021.9 1022.0 1019.8 1023.4 1022.0 1024.5 1025.1 1026.3 1023.3 1026.3 DAY 31 11 21 2 6 30 30 21 29 16 17 4 MIN. QNH PRESSURE IN HPA 1005.9 1000.6 1006.5 1015.8 1014.7 1010.9 1010.8 1011.6 1011.0 1015.8 1014.5 1007.1 1000.6 DAY 17 7 2 22 27 26 12 31 1 2 6 15 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 775.4 776.8 776.6 779.9 778.9 777.2 778.3 779.3 779.8 781.8 780.5 778.5 778.6 MAX. QFE PRESSURE IN HPA 782.3 781.5 781.0 782.0 782.5 781.0 784.0 782.1 784.0 784.0 785.2 783.1 785.2 DAY 31 11 21 2 6 30 30 20 9 7 17 18 MIN. QFE PRESSURE IN HPA 769.3 766.8 771.1 777.9 776.2 773.0 773.2 773.6 773.0 777.2 775.0 769.8 766.8 DAY 17 7 2 6 27 26 12 31 1 2 6 15 MEAN QNH PRESSURE IN HPA 1012.6 1014.4 1014.1 1018.3 1016.9 1014.8 1016.2 1017.4 1018.1 1020.6 1019.0 1016.5 1016.6 MAX. QNH PRESSURE IN HPA 1021.2 1020.2 1019.6 1020.8 1021.4 1019.6 1023.3 1020.9 1023.3 1023.3 1024.8 1022.2 1024.8 DAY 31 11 21 2 6 30 30 20 9 7 17 18 MIN. QNH PRESSURE IN HPA 1005.0 1001.9 1007.3 1015.7 1013.6 1009.6 1009.9 1010.4 1009.6 1014.8 1012.1 1005.7 1001.9 DAY 17 7 2 6 27 26 12 31 1 2 6 15 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 774.7 775.8 775.4 778.7 777.9 776.0 777.3 778.0 778.6 780.8 779.8 777.9 777.6 MAX. QFE PRESSURE IN HPA 781.8 780.5 779.3 780.7 781.3 779.7 783.1 781.1 783.0 783.0 784.8 782.2 784.8 DAY 30 10 21 13 7 30 30 20 29 16 17 17 MIN. QFE PRESSURE IN HPA 768.4 766.8 771.2 776.5 775.0 772.8 772.2 773.0 772.0 777.0 775.0 769.9 766.8 DAY 28 7 2 6 17 26 11 30 1 2 6 15 MEAN QNH PRESSURE IN HPA 1011.7 1013.1 1012.6 1016.8 1015.7 1013.4 1015.0 1015.9 1016.6 1019.3 1018.0 1015.7 1015.3 MAX. QNH PRESSURE IN HPA 1020.6 1018.9 1017.5 1019.2 1019.9 1018.0 1022.2 1019.7 1022.0 1022.0 1024.3 1021.1 1024.3 DAY 30 10 21 13 7 30 30 20 29 16 17 17 MIN. QNH PRESSURE IN HPA 1003.9 1001.9 1007.4 1014.0 1012.1 1009.4 1008.6 1009.6 1008.4 1014.6 1012.1 1005.8 1001.9 DAY 28 7 2 6 17 26 11 30 1 2 6 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 775.3 776.2 775.8 779.0 778.1 776.0 777.2 777.8 778.8 781.4 780.3 778.6 777.9 MAX. QFE PRESSURE IN HPA 782.8 781.0 780.0 780.7 781.5 779.3 782.8 781.2 783.0 784.7 784.6 783.1 784.7 DAY 30 10 21 13 7 17 30 20 29 27 17 17 MIN. QFE PRESSURE IN HPA 769.2 767.3 771.2 776.6 775.2 773.0 772.2 773.0 772.5 778.0 775.3 771.3 767.3 DAY 17 7 24 6 27 25 11 30 2 1 6 15 MEAN QNH PRESSURE IN HPA 1012.4 1013.6 1013.1 1017.1 1016.0 1013.4 1014.8 1015.6 1016.8 1020.1 1018.7 1016.6 1015.7 MAX. QNH PRESSURE IN HPA 1021.8 1019.6 1018.3 1019.2 1020.2 1017.5 1021.8 1019.8 1022.0 1024.2 1024.0 1022.2 1024.2 DAY 30 10 21 13 7 17 30 20 29 27 17 17 MIN. QNH PRESSURE IN HPA 1004.9 1002.6 1007.4 1014.1 1012.4 1009.6 1008.6 1009.6 1009.0 1015.8 1012.5 1007.5 1002.6 DAY 17 7 24 6 27 25 11 30 2 1 6 15 MEAN QFF PRESSURE IN HPA 1015.1 1016.7 1010.1 1006.0 1001.4 995.8 996.1 997.7 1001.9 1011.4 1016.4 1016.2 1007.1 MAX. QFF PRESSURE IN HPA 1033.8 1035.0 1017.8 1013.1 1007.9 1001.4 1004.6 1003.1 1009.0 1016.1 1025.7 1028.0 1035.0 DAY 31 10 3 2 3 16 30 23 29 27 17 17 MIN. QFF PRESSURE IN HPA 1005.0 1004.6 997.5 1000.7 994.6 990.3 986.2 992.3 993.8 1002.2 1009.2 1007.9 986.2 DAY 28 7 24 21 27 25 11 30 2 1 5 11 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 BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.0 2.9 8.1 14.8 19.0 23.9 26.2 24.6 20.7 15.9 7.6 4.7 14.0 MINIMUN AIR TEMPERATURE (C) -7.7 -5.0 -1.9 3.7 7.6 10.1 13.3 11.2 7.7 5.1 -1.4 -1.0 3.5 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 7 1 0 0 0 0 0 0 7 6 65 DAYS WITH FREEZING MIN.<= 0 31 26 23 4 0 0 0 0 0 0 18 20 122 TEMPERATURE RECORDS LOWEST(C) -22.0 -10.6 -9.0 -4.2 2.2 5.2 8.0 7.0 4.6 1.6 -9.0 -7.4 -22.0 DAY 28 12 11 14 22 13 31 1 9 15 20 18 MAXIMUM AIR TEMPERATURE (C) 5.7 8.2 13.8 20.1 24.0 29.2 31.6 30.5 26.7 21.6 13.4 9.0 19.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 16 23 23 0 0 0 0 62 DAYS WITH MAXIMUM TEMP. <= 0 4 0 0 0 0 0 0 0 0 0 0 0 4 TEMPERATURE RECORDS HIGHEST(C) 12.8 15.2 19.6 23.2 28.8 33.5 35.4 32.2 29.6 24.6 20.8 13.8 35.4 DAY 16 28 31 27 15 29 14 7 5 1 5 29 DIF. BETWEEN (MAX.-MIN.) (C) 13.4 13.2 15.7 16.4 16.4 19.1 18.3 19.3 19.0 16.5 14.8 10.0 16.0 MEAN DAILY TEMP. (MDT) (C) -1.0 1.6 5.9 11.9 15.8 19.6 22.5 20.9 17.2 13.3 6.0 4.0 11.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 9.7 57.4 18.1 0.0 0.0 0.0 0.0 85.3 HEATING DEG. DAYS(BASE 18 0C) 589.6 458.5 374.3 183.5 69.2 9.1 0.0 0.4 37.3 145.1 359.7 433.3 2660.0 DEWPOINT (MEAN C) -8.8 -9.1 -7.0 -6.0 -1.2 -0.9 0.8 0.0 -1.1 -0.3 -6.1 -2.2 -3.5 MIXING RATIO (G/KG) 2.65 2.64 3.05 3.28 4.63 4.77 5.29 5.11 4.66 4.95 3.29 4.38 4.06 VAPOUR PRESSURE (HPA) 3.30 3.28 3.80 4.09 5.75 5.91 6.54 6.33 5.79 6.15 4.08 5.42 5.04 SATURATION DEF. (HPA) 3.39 4.69 7.84 13.57 17.48 25.50 29.45 26.51 20.33 12.91 7.20 3.36 14.35 RELATIVE HUMIDITY (MEAN %) 58 48 41 26 29 22 21 22 26 36 43 66 37 RELATIVE HUMIDITY (MAX. %) 81 73 70 44 49 39 34 37 41 56 64 84 56 RELATIVE HUMIDITY (MIN. %) 40 29 24 16 19 14 14 14 17 24 27 49 24 RELATIVE HUMIDITY (MEAN% 03UTC) 78 71 70 44 46 39 34 37 41 55 59 82 55 RELATIVE HUMIDITY (MEAN% 09UTC) 48 38 30 18 23 17 16 16 19 26 35 58 29 RELATIVE HUMIDITY (MEAN% 15UTC) 55 39 30 24 26 17 17 18 22 36 39 64 32 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 15.1 12.1 54.7 0.0 17.5 3.1 0.0 0.2 0.0 1.9 24.6 136.5 265.7 DAYS WITH PRECIPITATION >=10 0 0 2 0 0 0 0 0 0 0 0 5 7 DAYS WITH PRECIPITATION >= 5 1 1 2 0 2 0 0 0 0 0 2 8 16 DAYS WITH PRECIPITATION >= 1 5 3 5 0 2 1 0 0 0 1 7 12 36 DAYS WITH PRECIPITATION 8 8 6 0 6 2 0 1 0 3 7 13 54 GREATEST DAILY PRECIPITATION 6.0 7.5 30.0 0.0 9.0 3.0 0.0 0.2 0.0 1.7 6.0 29.0 30.0 DAY 27 21 10 ** 4 15 ** 13 ** 28 13 8 DAY WITH THUNDER STORM 0 0 1 0 1 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 5 5 2 0 0 0 0 0 0 0 2 3 17 DAYS WITH DUST 0 0 0 0 0 1 0 0 1 1 0 0 3 WIND DIRECTION (PREVAILING) 225 225 270 270 225 225 225 90 270 270 270 225 270 PREVAILING WIND SPEED(KNOTS) 9.1 9.8 10.2 12.5 13.1 11.1 11.4 12.7 11.3 12.7 10.4 10.0 11.4 PREVAILING WIND PERCENT 12.9 24.3 26.5 35.3 28.4 15.3 14.2 11.0 17.3 25.8 16.7 16.8 17.8 CALMS PERCENT OF WIND 64.5 48.6 45.8 37.3 31.0 42.7 41.9 58.1 54.0 49.0 66.7 58.7 49.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 220 223 248 256 242 181 184 40 279 263 244 222 244 VECTOR WIND MAGNITUDE(KNOTS) 2.3 3.0 4.2 6.3 6.9 0.7 0.5 0.9 2.2 3.6 3.1 3.6 2.8 WIND STEADINESES (MEAN %) 69.7 61.2 76.4 84.0 78.4 11.7 7.9 18.4 42.3 61.0 79.5 78.3 50.0 WIND SPEED (MEAN KNOTS) 3.3 4.9 5.5 7.5 8.8 6.0 6.3 4.9 5.2 5.9 3.9 4.6 5.6 FASTEST WIND DIRECTION 250 230 240 280 210 240 210 300 300 260 210 230 210 FASTEST WIND SPEED (KNOTS) 17 23 23 25 27 17 19 23 19 25 23 21 27 DAY 24 4 15 12 10 9 8 12 1 30 18 24 DAYS WITH SKY CLEAR (0-2)/8 19 17 19 15 20 27 30 26 29 23 16 11 252 DAYS WITH P.CLOUDY (3-6)/8 9 7 10 13 9 3 1 5 1 8 12 9 87 DAYS WITH CLOUDY (7-8)/8 3 4 2 2 2 0 0 0 0 0 2 11 26 DAYS WITH VISIBILITY =< 2 KM 4 1 3 0 0 0 0 0 0 0 1 2 11 DURATION OF SUNSHINE HOURS 232.3 248.7 288.2 297.1 346.3 368.1 364.8 356.6 321.4 298.9 243.4 159.5 3525.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 777.7 776.8 778.1 779.6 778.7 776.5 776.0 778.5 778.4 779.0 775.9 775.1 777.5 MAX. QFE PRESSURE IN HPA 782.6 783.5 785.4 786.2 784.1 783.0 781.3 783.1 783.2 784.8 782.5 781.1 786.2 DAY-HOUR 14- 6 28- 6 2- 6 2- 6 16- 6 2- 6 28- 6 5- 6 23- 6 10- 6 4- 6 9- 6 MIN. QFE PRESSURE IN HPA 770.2 767.0 767.0 773.7 773.0 771.4 771.0 773.0 774.8 774.5 765.0 767.1 765.0 DAY-HOUR 27- 3 21-12 25-12 9-15 26-12 11-15 17-12 27-12 5-15 31-12 18-12 5-12 MEAN QNH PRESSURE IN HPA 1015.5 1014.4 1015.9 1017.8 1016.8 1014.0 1013.3 1016.4 1016.3 1017.1 1013.3 1012.2 1015.2 MAX. QNH PRESSURE IN HPA 1021.5 1022.7 1025.0 1026.0 1023.4 1022.0 1019.9 1022.2 1022.3 1024.3 1021.4 1019.7 1026.0 DAY-HOUR 14- 6 28- 6 2- 6 2- 6 16- 6 2- 6 28- 6 5- 6 23- 6 10- 6 4- 6 9- 6 MIN. QNH PRESSURE IN HPA 1006.2 1002.2 1002.2 1010.5 1009.6 1007.6 1007.1 1009.6 1011.9 1011.5 999.7 1002.3 999.7 DAY-HOUR 27- 3 21-12 25-12 9-15 26-12 11-15 17-12 27-12 5-15 31-12 18-12 5-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 777.6 776.8 778.2 779.8 778.9 777.2 776.5 778.9 778.8 779.2 776.0 775.0 777.7 MAX. QFE PRESSURE IN HPA 781.5 782.0 784.8 785.6 783.7 782.0 781.0 782.6 782.2 784.0 781.9 779.0 785.6 DAY 15 28 2 2 17 2 29 5 23 10 4 9 MIN. QFE PRESSURE IN HPA 770.2 768.6 768.0 774.6 773.7 773.0 772.0 775.0 776.0 775.0 768.0 768.3 768.0 DAY 27 21 26 10 9 18 18 27 14 31 18 5 MEAN QNH PRESSURE IN HPA 1015.4 1014.3 1016.0 1018.0 1017.0 1014.8 1014.0 1017.0 1016.9 1017.3 1013.4 1012.1 1015.5 MAX. QNH PRESSURE IN HPA 1020.2 1020.8 1024.3 1025.3 1022.9 1020.8 1019.6 1021.5 1021.1 1023.3 1020.7 1017.1 1025.3 DAY 15 28 2 2 17 2 29 5 23 10 4 9 MIN. QNH PRESSURE IN HPA 1006.2 1004.2 1003.4 1011.6 1010.5 1009.6 1008.4 1012.1 1013.4 1012.1 1003.4 1003.8 1003.4 DAY 27 21 26 10 9 18 18 27 14 31 18 5 MEAN QFF PRESSURE IN HPA 1018.6 1014.6 1011.9 1008.4 1003.0 997.2 994.4 999.2 1002.6 1006.8 1009.7 1009.8 1006.3 MAX. QFF PRESSURE IN HPA 1034.6 1023.9 1021.7 1016.1 1008.9 1005.4 1002.7 1004.2 1010.3 1013.4 1018.7 1019.5 1034.6 DAY 29 13 2 2 11 2 30 6 22 10 20 18 MIN. QFF PRESSURE IN HPA 1008.6 1000.8 998.6 999.7 996.3 990.8 987.3 992.5 995.7 1000.9 997.6 999.8 987.3 DAY 4 21 25 26 30 30 18 27 6 2 18 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 778.7 777.8 779.1 780.5 779.5 777.5 776.8 779.5 779.6 780.1 776.9 776.1 778.5 MAX. QFE PRESSURE IN HPA 782.6 783.5 785.4 786.2 784.1 783.0 781.3 783.1 783.2 784.8 782.5 781.1 786.2 DAY 14 28 2 2 16 2 28 5 23 10 4 9 MIN. QFE PRESSURE IN HPA 772.0 768.6 769.3 775.4 775.0 774.0 772.3 775.0 777.0 775.7 768.0 768.7 768.0 DAY 27 21 26 10 9 18 18 27 1 31 18 5 MEAN QNH PRESSURE IN HPA 1016.7 1015.6 1017.2 1018.9 1017.7 1015.2 1014.4 1017.7 1017.8 1018.4 1014.5 1013.4 1016.5 MAX. QNH PRESSURE IN HPA 1021.5 1022.7 1025.0 1026.0 1023.4 1022.0 1019.9 1022.2 1022.3 1024.3 1021.4 1019.7 1026.0 DAY 14 28 2 2 16 2 28 5 23 10 4 9 MIN. QNH PRESSURE IN HPA 1008.4 1004.2 1005.0 1012.6 1012.1 1010.9 1008.8 1012.1 1014.6 1013.0 1003.4 1004.3 1003.4 DAY 27 21 26 10 9 18 18 27 1 31 18 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 777.9 777.1 778.4 779.7 778.9 776.8 776.2 778.7 778.6 779.1 776.0 775.2 777.7 MAX. QFE PRESSURE IN HPA 782.0 783.0 784.8 785.8 783.5 782.1 780.9 783.0 782.3 783.9 781.6 780.0 785.8 DAY 14 28 1 1 16 2 28 5 22 10 4 9 MIN. QFE PRESSURE IN HPA 772.3 768.0 770.0 774.6 774.0 773.2 771.9 774.0 775.9 775.0 768.7 768.0 768.0 DAY 27 21 25 9 26 17 18 27 6 31 18 5 MEAN QNH PRESSURE IN HPA 1015.7 1014.8 1016.3 1018.0 1016.9 1014.3 1013.6 1016.8 1016.6 1017.2 1013.4 1012.3 1015.5 MAX. QNH PRESSURE IN HPA 1020.8 1022.0 1024.3 1025.5 1022.7 1020.9 1019.4 1022.0 1021.2 1023.2 1020.3 1018.3 1025.5 DAY 14 28 1 1 16 2 28 5 22 10 4 9 MIN. QNH PRESSURE IN HPA 1008.8 1003.4 1005.9 1011.6 1010.9 1009.9 1008.3 1010.9 1013.2 1012.1 1004.3 1003.4 1003.4 DAY 27 21 25 9 26 17 18 27 6 31 18 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 776.9 776.0 777.2 778.7 778.0 775.7 775.2 777.6 777.4 778.1 775.0 774.3 776.7 MAX. QFE PRESSURE IN HPA 781.0 781.8 783.4 784.0 782.0 780.7 779.9 781.7 781.6 782.5 780.8 779.0 784.0 DAY 14 28 1 1 16 2 27 5 22 10 4 9 MIN. QFE PRESSURE IN HPA 771.5 767.0 767.0 773.9 773.0 772.0 771.0 773.0 774.9 774.5 765.0 767.1 765.0 DAY 26 21 25 9 26 11 17 27 5 31 18 5 MEAN QNH PRESSURE IN HPA 1014.5 1013.3 1014.8 1016.7 1015.9 1012.9 1012.3 1015.4 1015.1 1015.9 1012.2 1011.2 1014.2 MAX. QNH PRESSURE IN HPA 1019.6 1020.6 1022.5 1023.3 1020.8 1019.2 1018.2 1020.4 1020.3 1021.4 1019.3 1017.1 1023.3 DAY 14 28 1 1 16 2 27 5 22 10 4 9 MIN. QNH PRESSURE IN HPA 1007.8 1002.2 1002.2 1010.8 1009.6 1008.4 1007.1 1009.6 1012.0 1011.5 999.7 1002.3 999.7 DAY 26 21 25 9 26 11 17 27 5 31 18 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 777.5 776.4 777.6 779.2 778.4 775.6 775.2 777.6 777.6 778.6 775.8 775.1 777.0 MAX. QFE PRESSURE IN HPA 781.7 782.4 784.0 784.6 782.4 780.2 780.1 781.2 782.3 782.9 781.2 779.6 784.6 DAY 14 28 1 4 16 3 27 5 23 10 4 9 MIN. QFE PRESSURE IN HPA 771.7 767.9 767.0 773.7 774.0 771.4 771.2 773.6 774.8 775.4 766.1 767.9 766.1 DAY 26 21 25 9 26 11 17 27 5 31 18 5 MEAN QNH PRESSURE IN HPA 1015.2 1013.8 1015.4 1017.3 1016.4 1012.9 1012.4 1015.4 1015.4 1016.6 1013.1 1012.2 1014.7 MAX. QNH PRESSURE IN HPA 1020.4 1021.3 1023.3 1024.0 1021.3 1018.6 1018.4 1019.8 1021.2 1021.9 1019.8 1017.8 1024.0 DAY 14 28 1 4 16 3 27 5 23 10 4 9 MIN. QNH PRESSURE IN HPA 1008.0 1003.3 1002.2 1010.5 1010.9 1007.6 1007.4 1010.4 1011.9 1012.6 1001.1 1003.3 1001.1 DAY 26 21 25 9 26 11 17 27 5 31 18 5 MEAN QFF PRESSURE IN HPA 1018.4 1013.8 1011.2 1007.6 1002.3 995.0 992.6 997.4 1000.9 1005.9 1009.4 1009.8 1005.4 MAX. QFF PRESSURE IN HPA 1034.0 1022.5 1020.7 1015.3 1007.4 1002.4 1001.2 1002.4 1010.2 1012.3 1018.5 1018.2 1034.0 DAY 29 12 1 1 10 2 30 14 23 10 20 17 MIN. QFF PRESSURE IN HPA 1010.9 1002.4 999.6 999.6 994.9 988.8 986.5 991.2 994.3 1001.8 996.0 999.8 986.5 DAY 19 18 25 9 26 30 11 27 5 31 18 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.8 4.2 8.3 11.9 18.7 23.0 25.5 25.8 22.6 15.7 6.8 2.2 13.8 MINIMUN AIR TEMPERATURE (C) -5.3 -3.6 -1.5 4.6 7.0 9.5 12.3 11.3 8.6 3.3 -1.5 -3.5 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 18 12 11 0 0 0 0 0 0 0 6 14 61 DAYS WITH FREEZING MIN.<= 0 27 21 16 5 1 0 0 0 0 5 21 23 119 TEMPERATURE RECORDS LOWEST(C) -13.6 -12.2 -9.0 -2.8 -0.6 2.0 6.8 7.6 5.6 -2.2 -8.2 -14.8 -14.8 DAY 25 5 11 6 7 22 1 30 30 28 30 24 MAXIMUM AIR TEMPERATURE (C) 5.6 9.2 13.9 16.3 23.6 28.3 31.3 31.9 28.7 22.5 12.2 6.7 19.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 6 26 29 8 0 0 0 69 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 10.8 13.4 19.2 24.0 28.4 31.6 34.2 33.4 31.0 25.4 17.8 11.6 34.2 DAY 6 24 13 28 19 29 20 10 1 3 11 7 DIF. BETWEEN (MAX.-MIN.) (C) 10.9 12.8 15.4 11.7 16.6 18.8 19.0 20.6 20.1 19.2 13.7 10.2 15.8 MEAN DAILY TEMP. (MDT) (C) 0.2 2.8 6.2 10.5 15.3 18.9 21.8 21.6 18.7 12.9 5.4 1.6 11.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 3.1 31.9 25.4 0.2 0.0 0.0 0.0 60.6 HEATING DEG. DAYS(BASE 18 0C) 553.1 426.5 364.8 227.1 88.9 8.0 0.0 0.0 10.9 158.3 379.3 507.9 2724.8 DEWPOINT (MEAN C) -8.3 -8.2 -6.9 -0.4 -0.8 1.0 2.7 0.0 -1.1 -2.6 -2.7 -5.5 -2.7 MIXING RATIO (G/KG) 2.86 2.82 3.13 5.02 4.85 5.46 6.19 5.19 4.69 4.28 4.22 3.52 4.35 VAPOUR PRESSURE (HPA) 3.53 3.48 3.85 6.15 5.97 6.71 7.59 6.37 5.79 5.29 5.21 4.32 5.35 SATURATION DEF. (HPA) 3.28 5.20 7.79 8.58 16.71 22.66 26.74 28.76 23.39 13.93 5.24 3.11 13.78 RELATIVE HUMIDITY (MEAN %) 55 45 37 47 29 26 25 21 23 31 56 60 38 RELATIVE HUMIDITY (MAX. %) 77 67 58 68 47 43 42 35 37 48 81 80 57 RELATIVE HUMIDITY (MIN. %) 38 29 23 34 20 18 17 14 16 21 37 43 26 RELATIVE HUMIDITY (MEAN% 03UTC) 75 65 55 64 47 43 42 35 37 47 77 77 55 RELATIVE HUMIDITY (MEAN% 09UTC) 45 36 31 40 23 19 20 15 17 23 44 52 30 RELATIVE HUMIDITY (MEAN% 15UTC) 50 39 32 45 26 21 20 16 19 29 55 60 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 58.7 20.2 39.3 69.0 0.0 0.0 0.0 0.0 0.0 0.8 25.3 65.8 279.1 DAYS WITH PRECIPITATION >=10 2 1 2 3 0 0 0 0 0 0 2 2 12 DAYS WITH PRECIPITATION >= 5 5 1 3 4 0 0 0 0 0 0 2 4 19 DAYS WITH PRECIPITATION >= 1 6 3 6 6 0 0 0 0 0 0 4 8 33 DAYS WITH PRECIPITATION 8 4 8 10 1 0 0 0 0 1 7 9 48 GREATEST DAILY PRECIPITATION 25.0 12.0 16.0 32.0 0.0 0.0 0.0 0.0 0.0 0.8 10.0 23.0 32.0 DAY 8 14 21 3 ** ** ** ** ** 22 7 10 DAY WITH THUNDER STORM 0 0 1 1 0 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 4 2 1 0 0 0 0 0 0 0 1 1 9 DAYS WITH DUST 0 0 0 1 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 225 270 270 270 270 270 270 270 180 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 11.7 12.0 11.0 11.3 11.5 12.3 7.8 7.6 8.9 11.4 10.2 10.0 10.9 PREVAILING WIND PERCENT 17.4 30.7 18.7 30.7 36.1 18.7 14.2 9.0 4.7 6.5 7.3 20.6 17.3 CALMS PERCENT OF WIND 55.5 39.3 51.6 33.3 38.7 58.7 71.6 72.9 83.3 79.4 82.0 64.5 61.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 226 248 242 247 261 252 255 233 223 248 257 247 247 VECTOR WIND MAGNITUDE(KNOTS) 3.8 4.8 3.7 5.9 6.3 2.0 1.1 1.0 0.7 1.2 0.9 3.0 2.8 WIND STEADINESES (MEAN %) 74.5 70.6 71.2 81.9 87.5 43.5 45.8 43.5 50.0 60.0 52.9 83.3 68.3 WIND SPEED (MEAN KNOTS) 5.1 6.8 5.2 7.2 7.2 4.6 2.4 2.3 1.4 2.0 1.7 3.6 4.1 FASTEST WIND DIRECTION 270 240 240 210 270 270 160 240 250 160 290 220 270 FASTEST WIND SPEED (KNOTS) 21 21 23 23 27 23 16 17 16 16 16 19 27 DAY 8 26 29 2 4 3 29 28 4 15 11 13 DAYS WITH SKY CLEAR (0-2)/8 16 12 20 10 23 27 28 26 25 24 15 14 240 DAYS WITH P.CLOUDY (3-6)/8 9 15 9 14 8 3 3 5 5 7 12 12 102 DAYS WITH CLOUDY (7-8)/8 6 1 2 6 0 0 0 0 0 0 3 5 23 DAYS WITH VISIBILITY =< 2 KM 2 0 0 0 0 0 0 0 0 0 1 1 4 DURATION OF SUNSHINE HOURS 233.0 239.9 268.6 214.2 350.8 358.2 355.0 336.8 295.4 285.9 200.6 196.6 3335.0 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 771.2 771.6 770.8 769.5 771.2 770.4 770.5 770.3 774.1 775.4 773.5 769.6 771.5 MAX. QFE PRESSURE IN HPA 778.1 780.0 780.1 776.0 775.4 775.0 774.1 774.0 779.0 780.9 780.0 777.0 780.9 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 10- 9 25- 6 31- 6 31- 6 21- 6 10- 6 18- 6 3- 6 MIN. QFE PRESSURE IN HPA 763.0 766.2 762.6 759.8 766.0 764.9 766.7 766.1 769.3 771.5 767.7 761.1 759.8 DAY-HOUR 21-12 25- 3 28-12 3- 9 4-12 21-12 22-15 7-15 18-15 29-12 26- 3 22- 3 MEAN QNH PRESSURE IN HPA 1007.3 1007.8 1006.9 1005.2 1007.4 1006.4 1006.5 1006.3 1011.0 1012.5 1010.3 1005.4 1007.8 MAX. QNH PRESSURE IN HPA 1016.0 1018.3 1018.4 1013.4 1012.6 1012.1 1011.0 1010.9 1017.1 1019.4 1018.3 1014.6 1019.4 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 10- 9 25- 6 31- 6 31- 6 21- 6 10- 6 18- 6 3- 6 MIN. QNH PRESSURE IN HPA 997.2 1001.2 996.7 993.2 1000.9 999.6 1001.8 1001.1 1005.0 1007.8 1003.1 994.9 993.2 DAY-HOUR 21-12 25- 3 28-12 3- 9 4-12 21-12 22-15 7-15 18-15 29-12 26- 3 22- 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 771.0 771.4 770.8 769.3 771.1 770.9 771.0 770.9 774.6 775.8 773.6 769.5 771.7 MAX. QFE PRESSURE IN HPA 777.1 778.6 779.7 775.0 775.0 774.2 773.8 773.5 778.0 780.0 778.8 776.0 780.0 DAY 26 6 11 1 25 25 31 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 764.2 766.2 765.0 760.7 767.6 766.8 768.0 768.0 771.1 772.7 767.7 761.1 760.7 DAY 22 25 21 4 13 20 23 7 18 30 26 22 MEAN QNH PRESSURE IN HPA 1007.1 1007.6 1006.9 1005.1 1007.3 1007.0 1007.2 1007.0 1011.6 1013.1 1010.4 1005.2 1008.0 MAX. QNH PRESSURE IN HPA 1014.7 1016.6 1018.0 1012.1 1012.1 1011.1 1010.6 1010.3 1015.8 1018.3 1016.8 1013.4 1018.3 DAY 26 6 11 1 25 25 31 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 998.7 1001.2 999.7 994.4 1002.9 1001.9 1003.4 1003.4 1007.3 1009.3 1003.1 994.9 994.4 DAY 22 25 21 4 13 20 23 7 18 30 26 22 MEAN QFF PRESSURE IN HPA 1008.5 1006.2 1002.2 995.7 993.1 989.6 987.6 987.9 995.5 1003.2 1006.8 1004.9 998.4 MAX. QFF PRESSURE IN HPA 1021.9 1021.5 1019.0 1005.8 997.8 994.6 995.5 994.4 1001.7 1008.1 1014.7 1017.0 1021.9 DAY 25 6 11 1 9 25 31 31 30 27 19 30 MIN. QFF PRESSURE IN HPA 997.2 993.1 990.2 983.2 986.9 982.2 983.1 983.2 990.2 999.4 995.9 992.6 982.2 DAY 8 25 28 3 21 19 23 7 10 15 13 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 772.1 772.5 771.7 770.0 771.8 771.2 771.5 771.3 775.3 776.6 774.7 770.6 772.4 MAX. QFE PRESSURE IN HPA 778.1 780.0 780.1 776.0 775.2 775.0 774.1 774.0 779.0 780.9 780.0 777.0 780.9 DAY 26 6 11 1 25 25 31 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 766.2 767.2 765.7 760.9 768.0 766.0 768.1 768.1 771.7 773.0 769.0 763.0 760.9 DAY 22 25 28 3 4 21 24 17 18 22 26 22 MEAN QNH PRESSURE IN HPA 1008.5 1009.0 1008.1 1005.9 1008.1 1007.4 1007.8 1007.6 1012.5 1014.1 1011.8 1006.6 1008.9 MAX. QNH PRESSURE IN HPA 1016.0 1018.3 1018.4 1013.4 1012.4 1012.1 1011.0 1010.9 1017.1 1019.4 1018.3 1014.6 1019.4 DAY 26 6 11 1 25 25 31 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1001.2 1002.4 1000.6 994.6 1003.4 1000.9 1003.5 1003.5 1008.0 1009.6 1004.7 997.2 994.6 DAY 22 25 28 3 4 21 24 17 18 22 26 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 771.3 771.9 771.2 769.7 771.5 770.7 770.7 770.6 774.3 775.4 773.6 769.7 771.7 MAX. QFE PRESSURE IN HPA 777.4 779.2 779.6 776.0 775.4 773.9 773.6 773.0 778.2 779.8 778.7 776.5 779.8 DAY 26 6 11 1 10 25 30 29 21 10 18 3 MIN. QFE PRESSURE IN HPA 765.0 767.3 766.0 759.8 766.9 765.3 768.0 767.4 770.5 772.7 768.2 762.0 759.8 DAY 21 25 28 3 4 21 23 17 18 22 26 21 MEAN QNH PRESSURE IN HPA 1007.5 1008.3 1007.4 1005.6 1007.7 1006.7 1006.8 1006.6 1011.3 1012.7 1010.3 1005.5 1008.0 MAX. QNH PRESSURE IN HPA 1015.1 1017.3 1017.8 1013.4 1012.6 1010.8 1010.4 1009.6 1016.1 1018.1 1016.7 1014.0 1018.1 DAY 26 6 11 1 10 25 30 29 21 10 18 3 MIN. QNH PRESSURE IN HPA 999.7 1002.6 1000.9 993.2 1002.1 1000.1 1003.4 1002.7 1006.5 1009.3 1003.7 996.0 993.2 DAY 21 25 28 3 4 21 23 17 18 22 26 21 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 770.4 770.7 769.9 769.1 770.7 769.7 769.7 769.4 773.1 774.3 772.7 769.0 770.7 MAX. QFE PRESSURE IN HPA 776.0 777.5 777.7 774.4 775.1 773.3 772.3 772.0 777.0 778.9 777.8 775.0 778.9 DAY 27 6 11 1 10 5 29 29 21 10 18 3 MIN. QFE PRESSURE IN HPA 763.0 766.5 762.6 760.0 766.0 764.9 767.0 766.2 769.5 771.5 768.0 761.3 760.0 DAY 21 20 28 3 4 21 22 7 18 29 25 21 MEAN QNH PRESSURE IN HPA 1006.4 1006.8 1005.8 1004.7 1006.8 1005.5 1005.5 1005.2 1009.7 1011.3 1009.2 1004.6 1006.8 MAX. QNH PRESSURE IN HPA 1013.4 1015.2 1015.5 1011.4 1012.2 1010.0 1008.8 1008.4 1014.6 1017.0 1015.6 1012.1 1017.0 DAY 27 6 11 1 10 5 29 29 21 10 18 3 MIN. QNH PRESSURE IN HPA 997.2 1001.6 996.7 993.5 1000.9 999.6 1002.2 1001.2 1005.3 1007.8 1003.4 995.1 993.5 DAY 21 20 28 3 4 21 22 7 18 29 25 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 771.1 771.4 770.4 769.3 770.9 769.6 769.6 769.5 773.2 774.7 773.2 769.6 771.0 MAX. QFE PRESSURE IN HPA 777.3 778.0 778.3 775.0 775.0 773.1 773.2 772.8 776.7 779.0 778.0 775.2 779.0 DAY 27 6 11 1 10 4 30 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 763.7 767.2 763.0 761.4 767.0 765.1 766.7 766.1 769.3 772.0 768.0 761.6 761.4 DAY 21 20 28 3 4 20 22 7 18 21 25 21 MEAN QNH PRESSURE IN HPA 1007.3 1007.6 1006.4 1005.0 1007.0 1005.4 1005.4 1005.3 1009.9 1011.8 1009.9 1005.4 1007.2 MAX. QNH PRESSURE IN HPA 1015.0 1015.8 1016.2 1012.1 1012.1 1009.8 1009.9 1009.4 1014.2 1017.1 1015.8 1012.4 1017.1 DAY 27 6 11 1 10 4 30 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 998.1 1002.4 997.2 995.2 1002.2 999.8 1001.8 1001.1 1005.0 1008.4 1003.4 995.5 995.2 DAY 21 20 28 3 4 20 22 7 18 21 25 21 MEAN QFF PRESSURE IN HPA 1008.9 1006.1 1001.5 995.6 992.6 987.8 985.7 985.9 993.6 1001.8 1006.3 1005.1 997.6 MAX. QFF PRESSURE IN HPA 1020.1 1019.4 1015.9 1004.4 996.8 993.9 993.5 992.6 1000.5 1007.1 1013.4 1015.0 1020.1 DAY 26 6 11 1 15 25 30 31 29 26 18 30 MIN. QFF PRESSURE IN HPA 998.4 996.7 987.9 985.8 987.4 981.9 981.2 980.5 987.6 998.2 997.3 991.3 980.5 DAY 11 25 28 3 21 20 22 7 2 14 12 21 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 BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.5 2.7 5.4 11.6 14.8 20.9 25.4 22.7 18.7 13.5 5.6 2.3 11.9 MINIMUN AIR TEMPERATURE (C) -6.0 -2.3 -1.0 4.6 5.4 9.9 14.4 11.5 7.3 4.5 -2.2 -3.1 3.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 22 9 7 0 0 0 0 0 0 0 11 13 62 DAYS WITH FREEZING MIN.<= 0 28 16 18 5 1 0 0 0 0 0 22 25 115 TEMPERATURE RECORDS LOWEST(C) -15.4 -15.0 -11.0 -1.8 -0.6 5.4 7.2 8.6 3.8 0.2 -10.0 -12.2 -15.4 DAY 27 1 2 18 1 7 2 11 29 25 24 13 MAXIMUM AIR TEMPERATURE (C) 6.0 8.1 11.6 18.0 21.8 28.9 33.6 31.4 27.8 21.7 13.9 8.8 19.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 12 30 23 2 0 0 0 67 DAYS WITH MAXIMUM TEMP. <= 0 3 0 0 0 0 0 0 0 0 0 0 1 4 TEMPERATURE RECORDS HIGHEST(C) 15.0 12.6 18.0 23.0 25.4 32.2 35.4 35.4 30.6 24.0 19.0 14.4 35.4 DAY 12 24 25 9 22 22 18 1 7 1 6 16 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 10.4 12.6 13.4 16.4 19.0 19.2 19.9 20.5 17.2 16.1 11.9 15.7 MEAN DAILY TEMP. (MDT) (C) -0.0 2.9 5.3 11.3 13.6 19.4 24.0 21.4 17.5 13.1 5.8 2.9 11.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 4.7 96.9 24.7 0.0 0.0 0.0 0.0 126.3 HEATING DEG. DAYS(BASE 18 0C) 558.0 422.6 394.4 200.5 135.2 6.3 0.0 0.0 27.1 152.7 364.7 469.1 2730.6 DEWPOINT (MEAN C) -9.5 -8.1 -7.3 -2.6 -2.5 -0.8 2.4 -1.6 -3.9 -4.7 -7.8 -7.5 -4.5 MIXING RATIO (G/KG) 2.55 2.93 3.16 4.33 4.25 4.78 6.05 4.58 3.79 3.57 3.02 3.06 3.84 VAPOUR PRESSURE (HPA) 3.14 3.59 3.88 5.33 5.25 5.87 7.40 5.64 4.68 4.42 3.73 3.77 4.73 SATURATION DEF. (HPA) 3.22 4.12 5.59 9.06 12.47 20.48 27.03 23.86 18.50 12.01 6.13 3.89 12.20 RELATIVE HUMIDITY (MEAN %) 58 50 45 42 33 26 24 21 23 30 41 54 37 RELATIVE HUMIDITY (MAX. %) 76 72 70 64 54 43 36 33 35 43 62 77 55 RELATIVE HUMIDITY (MIN. %) 39 28 24 24 17 14 15 13 13 18 22 30 21 RELATIVE HUMIDITY (MEAN% 03UTC) 67 65 64 59 51 41 35 33 34 42 56 68 51 RELATIVE HUMIDITY (MEAN% 09UTC) 48 39 34 30 22 16 16 15 15 21 28 39 27 RELATIVE HUMIDITY (MEAN% 15UTC) 50 42 35 33 24 17 18 15 17 24 36 47 30 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 37.8 35.2 58.7 37.6 0.4 0.0 0.0 0.0 0.0 0.0 2.5 59.5 231.7 DAYS WITH PRECIPITATION >=10 2 2 4 2 0 0 0 0 0 0 0 2 12 DAYS WITH PRECIPITATION >= 5 2 3 4 2 0 0 0 0 0 0 0 4 15 DAYS WITH PRECIPITATION >= 1 4 4 6 4 0 0 0 0 0 0 1 5 24 DAYS WITH PRECIPITATION 9 8 8 8 1 0 0 0 0 0 4 9 47 GREATEST DAILY PRECIPITATION 17.0 12.4 19.0 16.0 0.4 0.0 0.0 0.0 0.0 0.0 1.3 27.0 27.0 DAY 28 4 26 22 8 ** ** ** ** ** 29 6 DAY WITH THUNDER STORM 0 0 1 2 0 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 6 1 3 0 0 0 0 0 0 0 0 4 14 DAYS WITH DUST 0 0 1 1 2 0 0 0 1 0 0 0 5 WIND DIRECTION (PREVAILING) 270 270 225 270 270 270 225 45 270 225 270 225 270 PREVAILING WIND SPEED(KNOTS) 8.3 10.0 10.8 9.6 9.7 10.6 8.6 8.1 9.8 9.1 10.9 12.4 9.8 PREVAILING WIND PERCENT 10.5 26.8 24.6 22.1 19.4 21.7 8.9 10.9 9.2 12.1 12.1 16.5 14.7 CALMS PERCENT OF WIND 76.6 45.1 44.4 49.2 61.7 57.1 65.3 63.7 72.1 64.5 64.2 65.3 60.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 234 243 238 237 269 259 193 43 260 236 236 230 241 VECTOR WIND MAGNITUDE(KNOTS) 1.6 4.7 4.8 4.0 2.2 3.2 1.2 0.7 0.7 1.8 2.0 2.8 2.3 WIND STEADINESES (MEAN %) 76.2 87.0 84.2 78.4 62.9 72.7 36.4 22.6 29.2 60.0 60.6 75.7 60.5 WIND SPEED (MEAN KNOTS) 2.1 5.4 5.7 5.1 3.5 4.4 3.3 3.1 2.4 3.0 3.3 3.7 3.8 FASTEST WIND DIRECTION 250 240 230 210 270 250 220 270 260 280 270 220 220 FASTEST WIND SPEED (KNOTS) 17 23 23 23 21 23 16 17 23 19 19 29 29 DAY 15 22 20 28 24 24 2 22 30 4 14 27 DAYS WITH SKY CLEAR (0-2)/8 17 14 14 8 17 28 25 31 30 24 20 14 242 DAYS WITH P.CLOUDY (3-6)/8 8 12 11 14 14 1 6 0 0 7 9 14 96 DAYS WITH CLOUDY (7-8)/8 6 2 6 8 0 1 0 0 0 0 1 3 27 DAYS WITH VISIBILITY =< 2 KM 5 1 1 0 0 0 0 0 0 0 0 4 11 DURATION OF SUNSHINE HOURS 206.7 235.1 232.1 229.3 320.1 358.1 337.4 371.0 336.1 276.0 253.6 212.6 3368.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 770.4 767.6 768.8 771.9 772.9 770.2 768.4 772.1 773.4 775.8 773.9 772.8 771.5 MAX. QFE PRESSURE IN HPA 779.2 775.0 775.0 780.0 776.5 775.5 774.0 775.9 779.0 780.5 781.7 778.0 781.7 DAY-HOUR 12- 6 6-18 2-18 8- 3 21- 6 3-18 3- 6 12- 6 23- 6 15- 6 25- 6 12- 6 MIN. QFE PRESSURE IN HPA 757.0 758.8 760.0 766.5 767.4 763.6 764.0 768.4 768.0 772.0 768.2 764.0 757.0 DAY-HOUR 28-12 19- 0 26-12 14- 0 29-12 30-12 1- 0 1-12 7-12 26-12 14-12 6-12 MEAN QNH PRESSURE IN HPA 1006.4 1002.9 1004.4 1008.3 1009.5 1006.1 1003.9 1008.5 1010.1 1013.1 1010.8 1009.4 1007.8 MAX. QNH PRESSURE IN HPA 1017.3 1012.1 1012.1 1018.3 1014.0 1012.7 1010.9 1013.2 1017.1 1018.9 1020.4 1015.8 1020.4 DAY-HOUR 12- 6 6-18 2-18 8- 3 21- 6 3-18 3- 6 12- 6 23- 6 15- 6 25- 6 12- 6 MIN. QNH PRESSURE IN HPA 989.8 992.0 993.5 1001.6 1002.7 998.0 998.5 1003.9 1003.4 1008.4 1003.7 998.5 989.8 DAY-HOUR 28-12 19- 0 26-12 14- 0 29-12 30-12 1- 0 1-12 7-12 26-12 14-12 6-12 MEAN QFF PRESSURE IN HPA 1006.7 1000.0 999.1 997.3 995.9 987.2 981.1 988.1 993.2 1000.7 1005.4 1007.0 996.8 MAX. QFF PRESSURE IN HPA 1023.1 1017.8 1015.6 1005.5 1004.4 997.5 992.2 995.7 1003.5 1010.5 1021.0 1021.0 1023.1 DAY-HOUR 31- 6 1- 6 2-15 3- 3 2- 3 2-15 3- 3 12- 3 27- 3 16- 3 25- 3 13- 3 MIN. QFF PRESSURE IN HPA 987.4 986.6 984.0 987.2 986.6 977.5 975.0 979.8 983.7 994.1 995.2 992.9 975.0 DAY-HOUR 28-12 19-12 12-12 21- 0 29- 6 30- 6 30-12 1- 9 7-12 1- 0 2- 9 6-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 770.1 767.4 768.3 771.3 772.6 770.1 768.3 772.0 773.4 775.6 773.8 772.5 771.3 MAX. QFE PRESSURE IN HPA 777.7 773.2 774.1 778.8 775.0 774.7 772.6 775.0 777.8 779.2 780.0 777.0 780.0 DAY 12 7 3 8 21 4 3 12 23 16 26 12 MIN. QFE PRESSURE IN HPA 761.8 758.8 760.9 766.5 767.6 765.0 764.0 768.8 770.0 773.0 769.8 767.0 758.8 DAY 29 19 13 14 29 30 1 1 7 1 15 6 MEAN QNH PRESSURE IN HPA 1006.1 1002.6 1003.8 1007.6 1009.2 1006.1 1003.8 1008.4 1010.2 1012.8 1010.6 1009.1 1007.5 MAX. QNH PRESSURE IN HPA 1015.5 1009.9 1011.0 1016.8 1012.1 1011.7 1009.1 1012.1 1015.6 1017.3 1018.3 1014.6 1018.3 DAY 12 7 3 8 21 4 3 12 23 16 26 12 MIN. QNH PRESSURE IN HPA 995.7 992.0 994.6 1001.6 1002.9 999.7 998.5 1004.4 1005.9 1009.6 1005.7 1002.2 992.0 DAY 29 19 13 14 29 30 1 1 7 1 15 6 MEAN QFF PRESSURE IN HPA 1005.3 999.1 997.9 996.2 995.7 987.7 981.4 988.2 993.0 1000.1 1004.5 1005.6 996.2 MAX. QFF PRESSURE IN HPA 1013.4 1014.7 1013.1 1002.2 1002.7 995.2 991.4 994.1 1000.1 1005.7 1016.6 1018.4 1018.4 DAY 31 1 3 4 2 4 3 12 28 15 25 13 MIN. QFF PRESSURE IN HPA 993.9 986.7 984.3 987.2 987.0 979.3 975.1 982.3 986.4 994.1 995.4 995.9 975.1 DAY 29 19 13 21 29 30 26 1 8 1 2 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 770.2 767.5 768.8 771.8 773.3 770.6 768.9 772.6 773.9 776.1 774.1 772.6 771.7 MAX. QFE PRESSURE IN HPA 778.0 773.2 774.3 780.0 776.0 775.2 773.5 775.7 778.2 779.9 780.0 776.4 780.0 DAY 12 7 3 8 21 4 3 12 23 15 25 12 MIN. QFE PRESSURE IN HPA 763.7 759.0 762.0 766.6 767.8 765.0 764.5 769.3 770.0 773.0 770.0 765.4 759.0 DAY 16 19 13 14 29 30 1 1 7 26 14 6 MEAN QNH PRESSURE IN HPA 1006.1 1002.8 1004.5 1008.2 1010.0 1006.6 1004.5 1009.2 1010.7 1013.5 1011.0 1009.1 1008.0 MAX. QNH PRESSURE IN HPA 1015.8 1009.9 1011.2 1018.3 1013.4 1012.4 1010.3 1013.0 1016.1 1018.2 1018.3 1013.9 1018.3 DAY 12 7 3 8 21 4 3 12 23 15 25 12 MIN. QNH PRESSURE IN HPA 998.1 992.2 996.0 1001.7 1003.2 999.7 999.1 1005.0 1005.9 1009.6 1005.9 1000.2 992.2 DAY 16 19 13 14 29 30 1 1 7 26 14 6 MEAN QFF PRESSURE IN HPA 1007.2 1001.1 1000.5 998.4 997.6 989.0 983.3 990.6 995.9 1003.1 1007.5 1008.2 998.5 MAX. QFF PRESSURE IN HPA 1018.3 1017.5 1015.5 1005.5 1004.4 996.8 992.2 995.7 1003.5 1010.5 1021.0 1021.0 1021.0 DAY 31 1 3 3 2 2 3 12 27 16 25 13 MIN. QFF PRESSURE IN HPA 994.9 988.2 988.5 992.0 986.7 980.4 977.9 985.2 988.5 997.3 1000.0 995.6 977.9 DAY 16 19 13 21 29 30 31 1 7 1 29 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 771.3 768.4 769.7 772.6 773.7 770.9 769.2 773.1 774.4 776.9 775.0 773.8 772.4 MAX. QFE PRESSURE IN HPA 779.2 774.8 775.0 780.0 776.5 775.2 774.0 775.9 779.0 780.5 781.7 778.0 781.7 DAY 12 6 3 8 21 4 3 12 23 15 25 12 MIN. QFE PRESSURE IN HPA 761.9 760.0 762.9 767.0 767.8 765.0 765.0 769.8 770.5 773.7 770.3 766.9 760.0 DAY 28 19 13 17 29 30 1 1 7 27 14 6 MEAN QNH PRESSURE IN HPA 1007.6 1003.9 1005.6 1009.2 1010.5 1007.0 1004.9 1009.8 1011.4 1014.5 1012.1 1010.6 1008.9 MAX. QNH PRESSURE IN HPA 1017.3 1011.9 1012.1 1018.3 1014.0 1012.4 1010.9 1013.2 1017.1 1018.9 1020.4 1015.8 1020.4 DAY 12 6 3 8 21 4 3 12 23 15 25 12 MIN. QNH PRESSURE IN HPA 995.8 993.5 997.1 1002.2 1003.2 999.7 999.7 1005.7 1006.5 1010.5 1006.3 1002.1 993.5 DAY 28 19 13 17 29 30 1 1 7 27 14 6 MEAN QFF PRESSURE IN HPA 1008.9 1001.6 1000.4 997.7 996.2 986.9 981.3 988.4 993.8 1001.6 1006.6 1008.7 997.7 MAX. QFF PRESSURE IN HPA 1023.1 1017.8 1013.8 1005.1 1003.2 994.1 990.3 993.1 1001.9 1007.2 1020.6 1020.7 1023.1 DAY 31 1 3 8 2 4 3 12 27 15 25 12 MIN. QFF PRESSURE IN HPA 996.1 990.8 988.9 991.7 986.6 977.5 976.1 981.9 986.2 995.6 997.8 999.3 976.1 DAY 28 20 26 17 29 30 26 1 7 1 2 19 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 770.4 767.7 769.0 772.2 773.1 770.4 768.6 772.3 773.5 775.9 773.8 772.6 771.6 MAX. QFE PRESSURE IN HPA 778.0 774.2 774.0 779.3 775.9 774.8 773.2 775.4 778.0 779.7 780.4 776.1 780.4 DAY 12 6 2 8 21 4 3 11 23 15 25 12 MIN. QFE PRESSURE IN HPA 760.0 759.7 762.0 767.0 767.9 764.6 764.9 769.0 769.3 772.7 769.0 765.2 759.7 DAY 28 19 26 14 29 30 26 1 7 26 14 6 MEAN QNH PRESSURE IN HPA 1006.4 1003.0 1004.7 1008.6 1009.8 1006.4 1004.2 1008.8 1010.3 1013.2 1010.6 1009.2 1007.9 MAX. QNH PRESSURE IN HPA 1015.8 1011.1 1010.9 1017.5 1013.2 1011.9 1009.9 1012.6 1015.8 1018.0 1018.8 1013.5 1018.8 DAY 12 6 2 8 21 4 3 11 23 15 25 12 MIN. QNH PRESSURE IN HPA 993.5 993.1 996.0 1002.2 1003.3 999.2 999.6 1004.7 1005.0 1009.3 1004.7 999.9 993.1 DAY 28 19 26 14 29 30 26 1 7 26 14 6 MEAN QFF PRESSURE IN HPA 1005.9 999.4 998.6 997.1 995.6 986.8 980.4 987.4 992.1 999.6 1004.1 1005.9 996.1 MAX. QFF PRESSURE IN HPA 1019.8 1011.7 1013.4 1003.2 1002.6 994.8 988.9 992.8 1000.8 1006.0 1017.9 1017.8 1019.8 DAY 31 1 2 3 1 1 3 11 27 15 25 12 MIN. QFF PRESSURE IN HPA 992.8 988.4 986.7 991.5 986.9 978.6 975.3 979.8 984.3 994.7 995.2 996.5 975.3 DAY 28 19 26 28 29 30 30 1 7 1 2 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 769.6 766.7 768.0 771.4 772.1 769.4 767.6 771.1 772.3 774.9 773.0 772.0 770.7 MAX. QFE PRESSURE IN HPA 777.0 773.2 773.0 778.4 775.3 774.0 772.2 774.5 776.5 779.0 780.0 775.0 780.0 DAY 12 6 2 8 10 1 3 11 27 15 25 8 MIN. QFE PRESSURE IN HPA 757.0 759.0 760.0 766.7 767.4 763.6 764.0 768.4 768.0 772.0 768.2 764.0 757.0 DAY 28 19 26 17 29 30 25 1 7 26 14 6 MEAN QNH PRESSURE IN HPA 1005.4 1001.8 1003.4 1007.6 1008.6 1005.2 1002.9 1007.3 1008.8 1012.0 1009.7 1008.4 1006.7 MAX. QNH PRESSURE IN HPA 1014.6 1009.9 1009.6 1016.3 1012.5 1010.9 1008.6 1011.5 1014.0 1017.1 1018.3 1012.1 1018.3 DAY 12 6 2 8 10 1 3 11 27 15 25 8 MIN. QNH PRESSURE IN HPA 989.8 992.2 993.5 1001.8 1002.7 998.0 998.5 1003.9 1003.4 1008.4 1003.7 998.5 989.8 DAY 28 19 26 17 29 30 25 1 7 26 14 6 MEAN QFF PRESSURE IN HPA 1004.7 998.2 997.3 996.3 995.1 986.8 980.2 987.0 991.6 999.2 1003.6 1005.1 995.4 MAX. QFF PRESSURE IN HPA 1017.4 1009.6 1011.7 1001.8 1002.1 995.0 989.5 993.4 999.3 1004.8 1016.9 1016.6 1017.4 DAY 31 1 2 7 2 1 3 11 27 16 25 12 MIN. QFF PRESSURE IN HPA 987.4 986.6 984.0 989.6 987.2 978.8 975.0 981.0 983.7 994.4 995.4 992.9 975.0 DAY 28 19 12 20 29 30 30 1 7 1 2 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 770.3 767.4 768.4 771.6 772.3 769.5 767.5 771.1 772.5 775.3 773.6 772.8 771.0 MAX. QFE PRESSURE IN HPA 777.5 774.0 774.0 778.7 775.3 774.9 771.9 774.5 776.3 779.0 780.7 775.6 780.7 DAY 12 6 2 8 10 1 3 11 27 15 25 22 MIN. QFE PRESSURE IN HPA 757.2 761.4 761.5 767.5 768.5 764.0 764.0 768.7 768.3 772.5 769.3 765.9 757.2 DAY 28 19 12 20 28 30 25 20 7 26 14 6 MEAN QNH PRESSURE IN HPA 1006.3 1002.6 1003.9 1007.9 1008.8 1005.3 1002.8 1007.3 1009.1 1012.5 1010.4 1009.3 1007.2 MAX. QNH PRESSURE IN HPA 1015.2 1010.9 1010.9 1016.7 1012.5 1012.0 1008.3 1011.5 1013.7 1017.1 1019.2 1012.9 1019.2 DAY 12 6 2 8 10 1 3 11 27 15 25 22 MIN. QNH PRESSURE IN HPA 990.0 995.2 995.3 1002.8 1004.0 998.5 998.5 1004.3 1003.8 1009.0 1005.0 1000.8 990.0 DAY 28 19 12 20 28 30 25 20 7 26 14 6 MEAN QFF PRESSURE IN HPA 1007.4 1000.8 999.8 998.1 996.3 987.7 981.4 988.6 994.2 1002.1 1007.0 1008.5 997.7 MAX. QFF PRESSURE IN HPA 1021.3 1012.3 1015.6 1003.4 1003.1 997.5 989.1 994.1 1002.1 1009.2 1020.8 1020.1 1021.3 DAY 31 1 2 8 2 2 3 11 27 15 25 13 MIN. QFF PRESSURE IN HPA 988.3 989.6 987.3 990.7 989.8 980.3 977.0 982.9 986.7 997.2 999.4 996.3 977.0 DAY 28 20 12 20 28 30 25 2 7 1 1 6 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 770.9 768.0 769.2 772.5 773.2 770.4 768.6 772.1 773.6 776.0 774.2 773.3 771.8 MAX. QFE PRESSURE IN HPA 778.2 775.0 775.0 779.0 776.0 775.5 772.8 775.1 777.1 779.8 781.0 776.8 781.0 DAY 7 6 2 7 10 3 3 11 26 15 25 11 MIN. QFE PRESSURE IN HPA 758.0 762.1 762.0 767.3 769.0 764.9 765.0 769.5 770.0 773.1 769.0 767.0 758.0 DAY 28 19 12 20 28 30 25 20 6 25 14 27 MEAN QNH PRESSURE IN HPA 1007.0 1003.4 1005.0 1009.0 1009.9 1006.4 1004.2 1008.5 1010.4 1013.4 1011.1 1010.0 1008.2 MAX. QNH PRESSURE IN HPA 1016.1 1012.1 1012.1 1017.1 1013.4 1012.7 1009.4 1012.2 1014.7 1018.1 1019.6 1014.4 1019.6 DAY 7 6 2 7 10 3 3 11 26 15 25 11 MIN. QNH PRESSURE IN HPA 991.0 996.1 996.0 1002.6 1004.7 999.6 999.7 1005.3 1005.9 1009.8 1004.7 1002.2 991.0 DAY 28 19 12 20 28 30 25 20 6 25 14 27 MEAN QFF PRESSURE IN HPA 1008.4 1000.9 999.6 997.6 995.4 986.3 980.6 987.3 992.9 1000.6 1005.8 1008.2 997.0 MAX. QFF PRESSURE IN HPA 1022.1 1013.1 1014.9 1004.0 1002.7 994.8 988.7 992.5 1000.7 1006.1 1018.4 1019.4 1022.1 DAY 31 6 2 8 2 3 3 11 27 15 25 12 MIN. QFF PRESSURE IN HPA 988.9 990.8 988.5 989.3 989.3 978.8 975.4 982.0 985.5 996.0 997.3 996.6 975.4 DAY 28 20 12 20 28 30 25 2 7 1 1 27 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 770.6 767.7 769.0 772.2 773.2 770.3 768.6 772.4 773.7 775.8 774.0 772.9 771.7 MAX. QFE PRESSURE IN HPA 777.3 774.2 775.0 779.0 775.6 775.1 772.8 775.5 778.0 779.2 780.9 777.0 780.9 DAY 11 6 2 7 10 3 3 11 22 15 25 11 MIN. QFE PRESSURE IN HPA 760.0 761.3 762.2 767.7 768.7 764.9 765.0 769.8 770.0 773.0 768.5 767.7 760.0 DAY 28 18 12 20 28 30 25 20 6 25 14 27 MEAN QNH PRESSURE IN HPA 1006.6 1003.0 1004.6 1008.7 1009.9 1006.3 1004.2 1008.8 1010.5 1013.1 1010.8 1009.5 1008.0 MAX. QNH PRESSURE IN HPA 1015.0 1011.1 1012.1 1017.1 1012.9 1012.2 1009.4 1012.7 1015.8 1017.3 1019.4 1014.6 1019.4 DAY 11 6 2 7 10 3 3 11 22 15 25 11 MIN. QNH PRESSURE IN HPA 993.5 995.1 996.2 1003.1 1004.3 999.6 999.7 1005.7 1005.9 1009.6 1004.0 1003.1 993.5 DAY 28 18 12 20 28 30 25 20 6 25 14 27 MEAN QFF PRESSURE IN HPA 1006.3 999.3 998.4 997.1 995.5 986.7 980.4 987.6 992.3 999.7 1004.5 1006.3 996.2 MAX. QFF PRESSURE IN HPA 1017.2 1011.4 1014.7 1002.1 1002.1 994.4 988.3 992.3 999.5 1006.0 1017.0 1019.0 1019.0 DAY 31 6 2 3 1 3 2 11 26 15 25 12 MIN. QFF PRESSURE IN HPA 991.4 991.3 987.0 989.6 988.1 979.2 975.8 980.9 985.5 995.9 995.6 997.4 975.8 DAY 28 19 12 20 28 29 24 1 7 12 1 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.8 2.6 7.2 9.2 15.5 21.1 22.5 23.5 18.2 12.4 7.1 -2.8 11.4 MINIMUN AIR TEMPERATURE (C) -3.6 -3.5 -0.3 3.0 7.1 10.6 12.5 12.3 8.0 2.6 0.4 -8.3 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 13 15 7 1 0 0 0 0 0 0 4 21 61 DAYS WITH FREEZING MIN.<= 0 25 24 17 6 0 0 0 0 0 7 14 30 123 TEMPERATURE RECORDS LOWEST(C) -12.4 -11.0 -9.2 -4.2 2.0 5.0 8.0 9.0 2.0 -1.8 -8.2 -23.0 -23.0 DAY 21 10 22 2 6 4 21 14 30 27 30 30 MAXIMUM AIR TEMPERATURE (C) 6.0 9.1 14.3 15.1 22.6 29.1 30.1 32.3 27.2 21.4 13.9 3.9 18.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 9 14 29 9 0 0 0 61 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 6 6 TEMPERATURE RECORDS HIGHEST(C) 9.6 16.0 20.4 21.8 26.6 31.6 34.4 34.6 31.8 25.8 20.0 10.0 34.6 DAY 5 29 9 22 27 30 30 5 10 4 11 7 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 12.6 14.6 12.1 15.5 18.5 17.6 20.0 19.2 18.8 13.5 12.2 15.3 MEAN DAILY TEMP. (MDT) (C) 1.2 2.8 7.0 9.1 14.8 19.8 21.3 22.3 17.6 12.0 7.1 -2.2 11.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 10.8 25.3 42.8 1.5 0.0 0.0 0.0 80.4 HEATING DEG. DAYS(BASE 18 0C) 520.6 440.1 341.0 267.9 99.9 5.3 0.0 0.0 46.5 185.4 326.8 626.0 2859.5 DEWPOINT (MEAN C) -6.2 -8.3 -5.6 -2.6 -1.0 0.4 2.3 -0.8 -3.1 -5.4 -3.8 -8.6 -3.6 MIXING RATIO (G/KG) 3.29 2.82 3.42 4.47 4.77 5.27 6.03 4.80 4.05 3.40 3.95 2.81 4.09 VAPOUR PRESSURE (HPA) 4.03 3.47 4.21 5.48 5.85 6.46 7.38 5.89 4.99 4.21 4.86 3.46 5.02 SATURATION DEF. (HPA) 2.70 4.35 6.83 6.63 12.70 20.06 21.35 25.05 17.68 11.44 5.80 2.06 11.39 RELATIVE HUMIDITY (MEAN %) 64 50 46 50 36 28 29 22 25 31 50 68 42 RELATIVE HUMIDITY (MAX. %) 86 73 70 75 60 46 47 34 40 48 72 87 62 RELATIVE HUMIDITY (MIN. %) 41 29 24 28 20 16 17 12 14 17 30 47 25 RELATIVE HUMIDITY (MEAN% 03UTC) 76 67 64 69 58 45 46 34 38 47 64 78 57 RELATIVE HUMIDITY (MEAN% 09UTC) 52 36 32 37 24 19 21 14 16 20 35 55 30 RELATIVE HUMIDITY (MEAN% 15UTC) 56 41 37 42 24 19 20 14 18 23 43 66 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 111.7 35.0 36.0 94.6 0.9 0.5 1.2 0.0 2.0 0.2 52.8 88.8 423.7 DAYS WITH PRECIPITATION >=10 3 2 2 6 0 0 0 0 0 0 1 3 17 DAYS WITH PRECIPITATION >= 5 5 2 3 6 0 0 0 0 0 0 3 5 24 DAYS WITH PRECIPITATION >= 1 7 3 5 8 0 0 0 0 1 0 6 7 37 DAYS WITH PRECIPITATION 11 5 6 11 4 2 3 0 1 1 7 8 59 GREATEST DAILY PRECIPITATION 45.2 21.1 15.0 26.0 0.3 0.3 0.8 0.0 2.0 0.2 33.4 31.0 45.2 DAY 7 6 15 4 3 23 8 ** 20 23 19 15 DAY WITH THUNDER STORM 2 1 3 5 3 1 1 0 1 0 1 0 18 DAYS WITH SNOW OR SLEET 8 2 4 0 0 0 0 0 0 0 0 8 22 DAYS WITH DUST 0 0 0 0 6 0 0 0 0 0 0 0 6 WIND DIRECTION (PREVAILING) 225 225 225 225 225 270 270 225 90 270 225 225 225 PREVAILING WIND SPEED(KNOTS) 10.7 13.0 10.7 11.9 14.2 9.6 11.0 7.8 9.2 13.1 10.2 7.5 11.2 PREVAILING WIND PERCENT 23.0 22.8 19.8 24.6 22.6 10.0 10.1 8.1 5.0 6.0 11.7 6.0 13.4 CALMS PERCENT OF WIND 58.9 43.1 52.4 42.1 44.8 65.4 56.5 68.1 80.0 88.3 73.3 87.1 63.4 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 222 225 235 232 235 226 254 165 116 258 230 217 228 VECTOR WIND MAGNITUDE(KNOTS) 3.4 5.6 3.4 5.0 5.1 1.0 0.5 0.8 0.5 1.0 2.2 0.7 2.3 WIND STEADINESES (MEAN %) 82.9 80.0 69.4 74.6 78.5 32.3 11.4 29.6 31.3 71.4 84.6 70.0 60.5 WIND SPEED (MEAN KNOTS) 4.1 7.0 4.9 6.7 6.5 3.1 4.4 2.7 1.6 1.4 2.6 1.0 3.8 FASTEST WIND DIRECTION 270 240 190 160 270 20 270 170 150 260 240 230 270 FASTEST WIND SPEED (KNOTS) 23 25 23 27 29 19 39 17 16 29 19 19 39 DAY 6 4 13 17 21 18 12 15 14 14 4 16 DAYS WITH SKY CLEAR (0-2)/8 13 16 13 6 20 23 19 24 27 25 17 18 221 DAYS WITH P.CLOUDY (3-6)/8 11 10 12 15 10 6 12 7 3 5 8 9 108 DAYS WITH CLOUDY (7-8)/8 7 3 6 9 1 1 0 0 0 1 5 4 37 DAYS WITH VISIBILITY =< 2 KM 6 1 2 2 0 0 0 0 0 0 0 6 17 DURATION OF SUNSHINE HOURS 204.2 248.3 241.3 223.7 338.1 317.6 304.6 344.1 316.6 304.9 211.4 205.7 3260.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 767.7 769.4 771.1 768.7 768.9 768.9 769.2 768.8 772.5 774.7 771.3 768.3 770.0 MAX. QFE PRESSURE IN HPA 774.0 777.0 778.1 774.2 773.4 774.1 774.1 773.0 777.1 778.8 776.0 776.8 778.8 DAY-HOUR 12- 6 10- 6 9- 6 28- 6 21-21 6- 6 18- 6 18- 6 26- 6 15- 6 1- 6 3-18 MIN. QFE PRESSURE IN HPA 760.4 762.0 762.0 758.0 759.8 763.0 764.0 764.8 766.9 770.3 763.1 761.6 758.0 DAY-HOUR 27- 3 15-12 31-21 17- 6 13-12 18-12 11- 0 3-15 16-12 20-12 23-21 15-12 MEAN QNH PRESSURE IN HPA 1003.1 1005.2 1007.3 1004.3 1004.5 1004.5 1004.8 1004.4 1009.0 1011.7 1007.5 1003.8 1005.8 MAX. QNH PRESSURE IN HPA 1010.9 1014.6 1016.0 1011.1 1010.1 1011.0 1011.0 1009.6 1014.7 1016.8 1013.4 1014.4 1016.8 DAY-HOUR 12- 6 10- 6 9- 6 28- 6 21-21 6- 6 18- 6 18- 6 26- 6 15- 6 1- 6 3-18 MIN. QNH PRESSURE IN HPA 994.0 996.0 996.0 991.0 993.2 997.2 998.5 999.4 1002.1 1006.3 997.3 995.5 991.0 DAY-HOUR 27- 3 15-12 31-21 17- 6 13-12 18-12 11- 0 3-15 16-12 20-12 23-21 15-12 MEAN QFF PRESSURE IN HPA 1001.9 1002.5 1000.4 995.2 990.0 985.3 984.4 983.2 992.4 1000.3 1000.5 1006.3 995.2 MAX. QFF PRESSURE IN HPA 1014.6 1017.9 1013.5 1004.8 997.8 996.1 993.0 991.7 1002.9 1009.9 1012.5 1032.6 1032.6 DAY-HOUR 12- 6 10- 6 23- 6 11-15 18- 3 1- 3 18- 3 31- 3 27- 3 27- 3 29- 6 30- 6 MIN. QFF PRESSURE IN HPA 989.6 987.8 984.3 981.3 978.4 977.5 976.5 977.1 983.6 991.0 987.2 992.0 976.5 DAY-HOUR 27- 0 15-12 31-21 17- 6 13-12 18-12 10-18 4- 9 12- 9 3- 9 23- 0 15-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 767.6 769.2 770.9 768.0 768.4 768.9 769.0 768.6 772.4 774.6 771.0 767.9 769.7 MAX. QFE PRESSURE IN HPA 773.2 775.9 777.0 772.4 772.2 773.0 772.8 772.0 776.0 778.0 775.0 776.1 778.0 DAY 12 10 9 28 22 6 18 18 27 15 1 4 MIN. QFE PRESSURE IN HPA 760.8 764.0 762.9 760.9 760.8 764.2 764.0 765.6 768.0 771.5 763.1 762.7 760.8 DAY 27 2 15 1 14 18 11 4 17 21 24 16 MEAN QNH PRESSURE IN HPA 1002.9 1004.9 1007.0 1003.4 1003.9 1004.5 1004.7 1004.2 1008.9 1011.7 1007.2 1003.3 1005.5 MAX. QNH PRESSURE IN HPA 1009.9 1013.2 1014.6 1008.9 1008.6 1009.6 1009.4 1008.4 1013.4 1015.8 1012.1 1013.5 1015.8 DAY 12 10 9 28 22 6 18 18 27 15 1 4 MIN. QNH PRESSURE IN HPA 994.5 998.5 997.1 994.6 994.5 998.7 998.5 1000.4 1003.4 1007.8 997.3 996.8 994.5 DAY 27 2 15 1 14 18 11 4 17 21 24 16 MEAN QFF PRESSURE IN HPA 1001.2 1001.6 999.8 994.3 989.4 985.8 984.3 983.2 991.8 999.6 999.5 1004.4 994.6 MAX. QFF PRESSURE IN HPA 1012.2 1014.5 1010.4 1002.3 994.7 995.4 991.0 988.9 1001.0 1005.8 1010.6 1027.0 1027.0 DAY 12 10 23 12 19 1 18 31 27 27 29 30 MIN. QFF PRESSURE IN HPA 989.6 988.9 991.2 983.3 980.7 979.0 978.0 978.7 984.9 993.1 987.2 992.1 978.0 DAY 27 15 15 17 13 18 11 4 17 3 23 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 767.6 769.2 771.2 768.6 769.1 769.4 769.6 769.2 773.0 775.0 771.5 768.1 770.1 MAX. QFE PRESSURE IN HPA 773.1 776.0 777.0 773.1 773.0 773.9 773.2 772.3 776.5 777.6 775.4 776.1 777.6 DAY 12 10 9 28 18 6 18 18 27 15 1 4 MIN. QFE PRESSURE IN HPA 760.4 762.1 762.7 759.7 761.6 764.6 764.6 766.5 768.8 772.0 764.2 762.6 759.7 DAY 27 2 15 17 14 18 11 4 17 3 23 15 MEAN QNH PRESSURE IN HPA 1002.9 1004.9 1007.4 1004.2 1004.7 1005.2 1005.4 1004.9 1009.6 1012.1 1007.7 1003.6 1006.1 MAX. QNH PRESSURE IN HPA 1009.8 1013.4 1014.6 1009.8 1009.6 1010.8 1009.9 1008.8 1014.0 1015.3 1012.6 1013.5 1015.3 DAY 12 10 9 28 18 6 18 18 27 15 1 4 MIN. QNH PRESSURE IN HPA 994.0 996.1 996.8 993.1 995.5 999.2 999.2 1001.6 1004.4 1008.4 998.7 996.7 993.1 DAY 27 2 15 17 14 18 11 4 17 3 23 15 MEAN QFF PRESSURE IN HPA 1002.5 1003.5 1001.9 996.2 991.3 987.3 986.5 985.6 995.0 1002.8 1002.3 1007.4 996.9 MAX. QFF PRESSURE IN HPA 1012.4 1017.6 1013.4 1003.0 997.8 996.1 993.0 991.7 1002.9 1009.9 1012.0 1030.5 1030.5 DAY 1 10 23 12 18 1 18 31 27 27 29 30 MIN. QFF PRESSURE IN HPA 992.2 992.1 993.0 982.5 980.7 980.3 979.3 981.0 987.1 996.8 990.6 993.0 979.3 DAY 27 2 13 17 16 18 11 4 17 3 23 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 768.6 770.1 772.2 769.3 769.5 769.7 770.0 769.7 773.7 775.9 772.3 769.3 770.9 MAX. QFE PRESSURE IN HPA 774.0 777.0 778.1 774.2 773.2 774.1 774.1 773.0 777.1 778.8 776.0 776.5 778.8 DAY 12 10 9 28 18 6 18 18 26 15 1 4 MIN. QFE PRESSURE IN HPA 762.0 763.0 763.5 758.0 762.2 765.0 765.0 766.3 769.8 772.5 765.0 763.0 758.0 DAY 27 2 15 17 13 18 11 4 16 3 23 16 MEAN QNH PRESSURE IN HPA 1004.1 1006.0 1008.6 1005.0 1005.3 1005.6 1005.9 1005.5 1010.5 1013.2 1008.7 1005.1 1007.0 MAX. QNH PRESSURE IN HPA 1010.9 1014.6 1016.0 1011.1 1009.9 1011.0 1011.0 1009.6 1014.7 1016.8 1013.4 1014.0 1016.8 DAY 12 10 9 28 18 6 18 18 26 15 1 4 MIN. QNH PRESSURE IN HPA 996.0 997.2 997.8 991.0 996.2 999.7 999.7 1001.3 1005.7 1009.0 999.7 997.2 991.0 DAY 27 2 15 17 13 18 11 4 16 3 23 16 MEAN QFF PRESSURE IN HPA 1003.4 1003.6 1001.5 995.7 990.2 985.5 984.5 983.3 993.4 1001.2 1001.7 1008.1 996.0 MAX. QFF PRESSURE IN HPA 1014.6 1017.9 1013.5 1003.6 996.5 993.3 990.7 988.4 1001.9 1007.6 1012.5 1032.6 1032.6 DAY 12 10 23 12 18 1 18 29 27 27 29 30 MIN. QFF PRESSURE IN HPA 994.0 992.8 991.1 981.3 981.9 979.1 977.3 977.2 985.2 993.8 991.6 995.1 977.2 DAY 27 2 31 17 13 18 11 4 12 3 23 16 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 767.9 769.6 771.4 768.8 769.0 769.0 769.4 768.9 772.7 774.7 771.3 768.5 770.1 MAX. QFE PRESSURE IN HPA 773.0 776.0 777.0 773.1 772.5 773.7 773.5 772.1 776.1 777.5 775.0 776.2 777.5 DAY 12 10 9 28 18 6 18 18 26 15 1 3 MIN. QFE PRESSURE IN HPA 762.5 763.5 764.5 759.0 760.8 764.5 764.8 765.5 768.0 771.1 763.8 762.3 759.0 DAY 27 15 15 17 13 18 11 4 16 3 23 16 MEAN QNH PRESSURE IN HPA 1003.3 1005.4 1007.7 1004.5 1004.6 1004.6 1005.1 1004.6 1009.3 1011.8 1007.5 1004.0 1006.0 MAX. QNH PRESSURE IN HPA 1009.6 1013.4 1014.6 1009.8 1009.0 1010.5 1010.3 1008.5 1013.5 1015.2 1012.1 1013.6 1015.2 DAY 12 10 9 28 18 6 18 18 26 15 1 3 MIN. QNH PRESSURE IN HPA 996.6 997.8 999.1 992.2 994.5 999.1 999.4 1000.3 1003.4 1007.3 998.2 996.3 992.2 DAY 27 15 15 17 13 18 11 4 16 3 23 16 MEAN QFF PRESSURE IN HPA 1001.6 1001.9 1000.0 994.8 989.5 984.6 983.9 982.2 991.4 999.1 999.5 1005.7 994.5 MAX. QFF PRESSURE IN HPA 1011.8 1013.5 1010.9 1001.8 995.0 993.8 991.0 987.9 999.1 1004.9 1008.4 1027.4 1027.4 DAY 12 10 23 12 18 1 18 30 30 26 29 30 MIN. QFF PRESSURE IN HPA 994.2 990.2 989.7 982.7 979.1 978.2 978.4 977.1 983.6 991.0 990.7 993.2 977.1 DAY 14 15 31 17 13 18 11 4 12 3 23 16 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 767.1 768.7 770.2 768.2 768.2 767.9 768.4 767.9 771.5 773.6 770.5 767.7 769.2 MAX. QFE PRESSURE IN HPA 772.0 775.3 775.5 772.2 771.9 772.2 772.1 770.8 775.0 776.0 774.0 775.9 776.0 DAY 11 10 8 11 21 6 18 18 26 15 1 3 MIN. QFE PRESSURE IN HPA 761.0 762.0 763.7 759.6 759.8 763.0 764.3 765.0 766.9 770.3 763.8 761.6 759.6 DAY 23 15 15 17 13 18 11 3 16 20 23 15 MEAN QNH PRESSURE IN HPA 1002.3 1004.3 1006.2 1003.7 1003.7 1003.2 1003.9 1003.3 1007.8 1010.4 1006.6 1003.1 1004.9 MAX. QNH PRESSURE IN HPA 1008.4 1012.5 1012.7 1008.6 1008.3 1008.6 1008.5 1006.9 1012.1 1013.4 1010.9 1013.2 1013.4 DAY 11 10 8 11 21 6 18 18 26 15 1 3 MIN. QNH PRESSURE IN HPA 994.7 996.0 998.1 993.0 993.2 997.2 998.8 999.7 1002.1 1006.3 998.2 995.5 993.0 DAY 23 15 15 17 13 18 11 3 16 20 23 15 MEAN QFF PRESSURE IN HPA 1000.5 1000.9 999.0 994.6 989.2 984.4 983.4 982.3 990.7 998.3 998.9 1004.2 993.9 MAX. QFF PRESSURE IN HPA 1012.0 1011.9 1009.0 1003.4 995.0 992.3 990.7 988.1 999.2 1003.6 1006.7 1024.1 1024.1 DAY 12 9 23 11 18 1 18 30 27 27 29 30 MIN. QFF PRESSURE IN HPA 992.5 987.8 990.4 983.2 978.4 977.5 978.7 978.7 983.8 991.5 988.8 992.0 977.5 DAY 14 15 31 17 13 18 10 1 11 3 23 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 767.5 769.2 770.6 768.6 768.4 768.1 768.4 767.8 771.6 774.0 771.1 768.3 769.5 MAX. QFE PRESSURE IN HPA 773.0 775.5 776.2 772.2 772.4 772.0 772.0 770.6 775.8 776.3 774.0 776.4 776.4 DAY 11 10 8 11 21 6 18 18 27 14 1 3 MIN. QFE PRESSURE IN HPA 761.2 763.2 764.0 760.5 760.1 763.1 764.5 764.8 767.1 770.3 764.0 762.2 760.1 DAY 23 15 31 17 13 15 10 3 16 20 27 16 MEAN QNH PRESSURE IN HPA 1002.9 1005.0 1006.6 1004.1 1003.9 1003.5 1003.9 1003.2 1007.9 1010.8 1007.2 1003.7 1005.2 MAX. QNH PRESSURE IN HPA 1009.6 1012.7 1013.6 1008.6 1008.9 1008.4 1008.4 1006.6 1013.1 1013.7 1010.9 1013.9 1013.9 DAY 11 10 8 11 21 6 18 18 27 14 1 3 MIN. QNH PRESSURE IN HPA 995.0 997.5 998.5 994.1 993.6 997.3 999.1 999.4 1002.3 1006.3 998.5 996.2 993.6 DAY 23 15 31 17 13 15 10 3 16 20 27 16 MEAN QFF PRESSURE IN HPA 1002.4 1003.3 1001.2 996.2 990.5 985.6 984.9 983.9 993.2 1001.5 1001.8 1007.5 996.0 MAX. QFF PRESSURE IN HPA 1011.9 1016.8 1012.5 1004.8 995.7 993.0 991.8 988.8 1002.2 1007.7 1010.0 1030.7 1030.7 DAY 12 10 22 11 3 1 18 30 26 27 30 30 MIN. QFF PRESSURE IN HPA 992.8 992.7 990.8 987.3 980.9 979.9 979.7 978.9 985.2 995.4 990.3 993.8 978.9 DAY 23 15 31 17 13 17 10 3 11 3 23 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 768.0 769.9 771.4 769.2 769.2 769.0 769.2 769.0 772.7 775.0 771.6 768.7 770.2 MAX. QFE PRESSURE IN HPA 773.8 775.5 777.4 773.0 773.2 772.9 772.2 771.9 776.0 777.8 774.9 776.8 777.8 DAY 11 10 8 27 21 6 18 17 26 14 1 3 MIN. QFE PRESSURE IN HPA 762.2 764.0 764.0 763.0 761.5 764.9 765.0 765.6 768.3 771.6 764.0 762.8 761.5 DAY 23 6 31 17 13 15 10 3 16 20 23 16 MEAN QNH PRESSURE IN HPA 1003.5 1005.7 1007.6 1004.9 1005.0 1004.7 1004.9 1004.6 1009.2 1012.1 1007.8 1004.3 1006.2 MAX. QNH PRESSURE IN HPA 1010.6 1012.7 1015.1 1009.6 1009.9 1009.5 1008.6 1008.3 1013.4 1015.6 1012.0 1014.4 1015.6 DAY 11 10 8 27 21 6 18 17 26 14 1 3 MIN. QNH PRESSURE IN HPA 996.2 998.5 998.5 997.2 995.3 999.6 999.7 1000.4 1003.8 1007.9 998.5 997.0 995.3 DAY 23 6 31 17 13 15 10 3 16 20 23 16 MEAN QFF PRESSURE IN HPA 1002.6 1003.2 1000.4 995.6 989.9 984.6 983.5 982.6 992.2 1000.2 1000.9 1007.4 995.3 MAX. QFF PRESSURE IN HPA 1012.3 1015.9 1013.2 1002.7 995.2 991.8 989.9 988.0 1001.6 1005.8 1011.0 1030.8 1030.8 DAY 12 9 22 12 18 1 18 31 27 26 28 29 MIN. QFF PRESSURE IN HPA 993.3 995.2 987.0 987.8 982.1 979.3 976.5 977.3 984.1 993.9 989.7 996.0 976.5 DAY 26 14 31 16 12 17 10 3 11 2 27 16 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 767.8 769.7 771.0 768.9 769.2 769.1 769.4 769.0 772.7 774.9 771.3 768.3 770.1 MAX. QFE PRESSURE IN HPA 773.2 775.8 777.2 773.0 773.4 773.1 773.0 772.0 776.0 777.8 775.0 776.5 777.8 DAY 11 9 8 27 21 6 17 17 26 14 1 3 MIN. QFE PRESSURE IN HPA 761.6 765.0 762.0 763.8 761.2 765.0 765.0 765.9 768.3 772.0 763.1 762.8 761.2 DAY 26 6 31 17 13 17 10 3 16 2 23 16 MEAN QNH PRESSURE IN HPA 1003.2 1005.5 1007.1 1004.5 1004.9 1004.8 1005.1 1004.7 1009.3 1012.0 1007.6 1003.8 1006.0 MAX. QNH PRESSURE IN HPA 1009.9 1013.1 1014.8 1009.6 1010.1 1009.8 1009.6 1008.4 1013.4 1015.6 1012.1 1014.0 1015.6 DAY 11 9 8 27 21 6 17 17 26 14 1 3 MIN. QNH PRESSURE IN HPA 995.5 999.7 996.0 998.2 995.0 999.7 999.7 1000.8 1003.8 1008.4 997.3 997.0 995.0 DAY 26 6 31 17 13 17 10 3 16 2 23 16 MEAN QFF PRESSURE IN HPA 1001.4 1002.0 999.2 994.8 989.8 984.7 983.9 982.4 991.6 999.5 999.7 1005.6 994.6 MAX. QFF PRESSURE IN HPA 1011.5 1014.7 1011.4 1000.6 995.7 991.4 989.6 987.7 999.3 1006.0 1010.5 1028.9 1028.9 DAY 11 9 22 12 18 1 17 30 26 26 28 29 MIN. QFF PRESSURE IN HPA 991.3 992.4 984.3 986.8 980.8 979.2 977.8 978.1 983.6 992.2 990.1 994.0 977.8 DAY 26 14 31 16 12 17 10 4 11 2 23 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -6.4 -0.8 6.6 12.2 14.9 21.0 24.7 23.1 19.4 12.9 5.7 2.9 11.4 MINIMUN AIR TEMPERATURE (C) -13.1 -6.4 0.3 4.2 6.0 9.9 13.8 12.6 8.6 3.8 -1.2 -3.8 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 28 18 1 2 0 0 0 0 0 1 10 14 74 DAYS WITH FREEZING MIN.<= 0 31 25 19 4 1 0 0 0 0 4 23 25 132 TEMPERATURE RECORDS LOWEST(C) -24.6 -15.6 -4.0 -4.2 0.0 6.0 10.0 8.0 4.0 -4.0 -6.0 -11.6 -24.6 DAY 13 11 3 7 7 3 1 31 28 25 26 31 MAXIMUM AIR TEMPERATURE (C) 1.1 5.5 12.6 19.5 22.5 29.6 32.8 31.8 28.8 21.9 12.8 10.3 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 15 29 23 12 0 0 0 79 DAYS WITH MAXIMUM TEMP. <= 0 11 1 0 0 0 0 0 0 0 0 0 2 14 TEMPERATURE RECORDS HIGHEST(C) 9.0 12.2 18.6 25.6 26.6 34.0 36.0 34.6 31.8 26.4 20.0 18.8 36.0 DAY 1 21 30 24 19 25 16 9 6 1 2 5 DIF. BETWEEN (MAX.-MIN.) (C) 14.2 11.9 12.3 15.3 16.5 19.7 19.0 19.2 20.2 18.1 14.0 14.1 16.2 MEAN DAILY TEMP. (MDT) (C) -6.0 -0.4 6.5 11.8 14.3 19.7 23.3 22.2 18.7 12.8 5.8 3.2 11.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 11.7 75.0 42.5 0.3 0.0 0.0 0.0 129.5 HEATING DEG. DAYS(BASE 18 0C) 743.5 515.9 357.7 184.5 116.3 12.8 0.0 0.1 11.3 160.3 365.6 457.3 2925.3 DEWPOINT (MEAN C) -11.7 -8.8 -6.7 -2.9 -2.4 -2.9 1.2 0.9 -3.4 -5.5 -4.6 -6.3 -4.4 MIXING RATIO (G/KG) 2.24 2.71 3.44 4.32 4.36 4.13 5.58 5.53 3.98 3.36 3.70 3.23 3.88 VAPOUR PRESSURE (HPA) 2.75 3.32 4.22 5.31 5.36 5.06 6.82 6.77 4.90 4.15 4.56 3.99 4.77 SATURATION DEF. (HPA) 1.58 2.88 5.92 9.81 12.59 21.68 26.04 23.43 19.33 11.87 5.12 4.11 12.03 RELATIVE HUMIDITY (MEAN %) 71 58 44 40 35 23 23 25 22 29 52 56 40 RELATIVE HUMIDITY (MAX. %) 87 81 68 63 58 39 36 39 34 44 79 80 59 RELATIVE HUMIDITY (MIN. %) 51 34 25 21 17 11 13 15 14 17 27 33 23 RELATIVE HUMIDITY (MEAN% 03UTC) 82 78 60 58 56 37 36 38 34 43 74 77 56 RELATIVE HUMIDITY (MEAN% 09UTC) 60 45 33 27 21 14 16 17 16 20 37 42 29 RELATIVE HUMIDITY (MEAN% 15UTC) 68 44 37 31 23 13 16 19 16 22 40 44 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 46.5 3.0 45.1 3.3 5.7 1.4 0.0 0.5 0.0 0.0 37.4 47.2 190.1 DAYS WITH PRECIPITATION >=10 2 0 1 0 0 0 0 0 0 0 2 2 7 DAYS WITH PRECIPITATION >= 5 5 0 3 0 0 0 0 0 0 0 2 2 12 DAYS WITH PRECIPITATION >= 1 7 1 7 1 2 1 0 0 0 0 3 4 26 DAYS WITH PRECIPITATION 9 4 9 4 5 2 0 2 0 0 4 5 44 GREATEST DAILY PRECIPITATION 14.4 2.0 22.6 2.1 4.0 1.0 0.0 0.4 0.0 0.0 25.2 21.0 25.2 DAY 10 26 12 2 26 11 ** 14 ** ** 8 24 DAY WITH THUNDER STORM 0 0 0 0 1 1 0 0 0 0 1 0 3 DAYS WITH SNOW OR SLEET 9 3 1 0 0 0 0 0 0 0 0 3 16 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 225 225 225 225 270 270 90 270 225 270 225 225 225 PREVAILING WIND SPEED(KNOTS) 11.1 10.1 8.6 9.8 9.4 7.8 9.3 8.5 8.6 9.7 9.3 9.8 9.1 PREVAILING WIND PERCENT 6.9 16.1 19.4 15.4 17.7 10.8 7.3 6.9 7.9 9.7 9.6 4.4 9.0 CALMS PERCENT OF WIND 82.7 66.1 58.5 62.5 65.7 69.6 70.6 76.2 78.8 79.8 74.2 83.9 72.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 209 231 237 215 245 252 121 155 216 249 224 195 227 VECTOR WIND MAGNITUDE(KNOTS) 1.5 2.5 3.2 2.9 2.1 1.1 0.4 0.1 1.3 1.3 1.7 0.9 1.5 WIND STEADINESES (MEAN %) 78.9 80.6 86.5 78.4 70.0 44.0 16.7 4.8 72.2 72.2 70.8 60.0 60.0 WIND SPEED (MEAN KNOTS) 1.9 3.1 3.7 3.7 3.0 2.5 2.4 2.1 1.8 1.8 2.4 1.5 2.5 FASTEST WIND DIRECTION 170 250 270 180 240 260 200 80 190 270 230 220 170 FASTEST WIND SPEED (KNOTS) 31 25 19 25 19 16 16 17 16 17 19 19 31 DAY 3 2 24 3 3 2 7 12 14 22 6 23 DAYS WITH SKY CLEAR (0-2)/8 17 14 13 14 21 30 23 28 30 30 16 18 254 DAYS WITH P.CLOUDY (3-6)/8 9 13 13 11 10 0 8 3 0 1 12 9 89 DAYS WITH CLOUDY (7-8)/8 5 1 5 5 0 0 0 0 0 0 2 4 22 DAYS WITH VISIBILITY =< 2 KM 4 0 0 0 0 0 0 0 0 0 0 1 5 DURATION OF SUNSHINE HOURS 226.8 236.5 258.8 268.2 328.8 382.6 321.6 352.6 327.4 315.9 229.0 207.1 3455.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 767.3 765.5 767.4 771.0 769.8 768.3 768.1 768.8 770.6 774.2 771.6 771.9 769.5 MAX. QFE PRESSURE IN HPA 774.7 772.1 772.0 776.1 774.0 773.6 772.0 772.6 774.1 780.2 777.8 778.0 780.2 DAY-HOUR 1- 6 18- 6 29- 6 21- 6 17- 6 16- 6 19- 6 17- 6 3- 6 12- 6 23- 6 8- 6 MIN. QFE PRESSURE IN HPA 754.9 759.1 759.8 764.8 760.4 762.7 761.5 764.5 767.0 768.2 765.0 763.0 754.9 DAY-HOUR 23- 3 9- 0 24- 0 29-12 6- 0 28-12 5-12 8-12 5-15 4-12 8-15 25-21 MEAN QNH PRESSURE IN HPA 1002.5 1000.3 1002.6 1007.1 1005.6 1003.8 1003.6 1004.4 1006.7 1011.1 1007.8 1008.2 1005.3 MAX. QNH PRESSURE IN HPA 1011.7 1008.5 1008.4 1013.5 1010.9 1010.4 1008.4 1009.1 1011.0 1018.6 1015.6 1015.8 1018.6 DAY-HOUR 1- 6 18- 6 29- 6 21- 6 17- 6 16- 6 19- 6 17- 6 3- 6 12- 6 23- 6 8- 6 MIN. QNH PRESSURE IN HPA 987.1 992.4 993.2 999.4 994.0 996.8 995.3 999.1 1002.2 1003.7 999.7 997.2 987.1 DAY-HOUR 23- 3 9- 0 24- 0 29-12 6- 0 28-12 5-12 8-12 5-15 4-12 8-15 25-21 MEAN QFF PRESSURE IN HPA 1008.7 1000.6 996.0 995.5 991.7 984.8 981.4 983.4 989.0 999.1 1002.2 1005.2 994.8 MAX. QFF PRESSURE IN HPA 1027.6 1018.2 1002.3 1004.4 997.9 993.8 990.0 991.0 996.2 1008.0 1011.2 1017.4 1027.6 DAY-HOUR 13- 6 15- 6 28-18 9- 3 24-15 3- 3 29- 3 17- 3 28- 3 24- 3 29- 6 31-21 MIN. QFF PRESSURE IN HPA 986.2 990.0 983.6 985.4 982.0 976.1 974.0 976.0 982.2 988.4 990.6 993.3 974.0 DAY-HOUR 23- 3 5- 0 24- 0 30- 9 6- 0 27-18 5-18 8-12 5-12 5- 0 6- 0 24- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 767.0 765.1 766.8 770.6 769.6 768.3 767.9 768.8 770.4 774.0 771.3 771.7 769.3 MAX. QFE PRESSURE IN HPA 774.4 771.0 770.8 775.0 773.1 772.6 771.0 771.5 773.0 779.0 775.0 776.1 779.0 DAY 1 18 29 21 17 7 29 17 3 12 23 8 MIN. QFE PRESSURE IN HPA 755.0 759.1 759.8 765.1 760.4 763.8 763.0 765.0 767.9 769.8 765.8 764.1 755.0 DAY 23 9 24 30 6 28 6 8 5 4 9 26 MEAN QNH PRESSURE IN HPA 1002.2 999.8 1002.0 1006.7 1005.4 1003.8 1003.3 1004.4 1006.4 1010.9 1007.5 1008.1 1005.0 MAX. QNH PRESSURE IN HPA 1011.4 1007.1 1006.9 1012.1 1009.8 1009.1 1007.1 1007.8 1009.6 1017.1 1012.1 1013.5 1017.1 DAY 1 18 29 21 17 7 29 17 3 12 23 8 MIN. QNH PRESSURE IN HPA 987.3 992.4 993.2 999.8 994.0 998.2 997.2 999.7 1003.3 1005.7 1000.7 998.6 987.3 DAY 23 9 24 30 6 28 6 8 5 4 9 26 MEAN QFF PRESSURE IN HPA 1007.1 999.0 994.8 994.9 991.5 984.9 981.3 983.6 988.4 998.3 1001.2 1003.9 994.1 MAX. QFF PRESSURE IN HPA 1022.5 1012.0 999.7 1001.8 995.4 992.2 988.5 989.0 992.4 1004.3 1007.3 1014.1 1022.5 DAY 14 15 28 9 12 4 29 19 28 31 26 31 MIN. QFF PRESSURE IN HPA 986.2 990.0 983.6 985.7 982.0 977.4 975.3 976.9 982.9 988.4 990.6 993.3 975.3 DAY 23 5 24 27 6 27 6 8 6 5 6 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 767.1 765.4 767.4 771.1 770.1 768.7 768.5 769.3 771.1 774.4 771.7 771.9 769.7 MAX. QFE PRESSURE IN HPA 774.0 771.2 771.5 775.8 773.4 772.8 771.6 772.0 773.9 779.4 776.1 776.9 779.4 DAY 1 18 30 21 17 17 29 17 3 12 23 8 MIN. QFE PRESSURE IN HPA 754.9 759.1 759.8 765.5 761.2 763.8 763.0 765.6 767.9 769.6 767.2 765.0 754.9 DAY 23 9 24 30 6 28 6 8 5 4 9 26 MEAN QNH PRESSURE IN HPA 1002.4 1000.1 1002.6 1007.3 1006.0 1004.3 1004.0 1005.0 1007.3 1011.4 1008.0 1008.3 1005.6 MAX. QNH PRESSURE IN HPA 1010.9 1007.4 1007.8 1013.1 1010.1 1009.4 1007.9 1008.4 1010.8 1017.6 1013.5 1014.5 1017.6 DAY 1 18 30 21 17 17 29 17 3 12 23 8 MIN. QNH PRESSURE IN HPA 987.1 992.4 993.2 1000.3 995.0 998.2 997.2 1000.4 1003.3 1005.4 1002.4 999.7 987.1 DAY 23 9 24 30 6 28 6 8 5 4 9 26 MEAN QFF PRESSURE IN HPA 1010.0 1001.4 997.5 997.3 993.4 986.8 983.5 985.9 991.7 1001.7 1004.0 1006.8 996.7 MAX. QFF PRESSURE IN HPA 1026.2 1014.5 1002.1 1004.4 997.7 993.8 990.0 991.0 996.2 1008.0 1010.5 1015.9 1026.2 DAY 14 15 29 9 8 3 29 17 28 24 29 31 MIN. QFF PRESSURE IN HPA 986.2 993.1 986.4 987.0 985.0 978.4 977.4 979.4 985.7 992.8 993.0 995.1 977.4 DAY 23 2 24 27 6 28 6 8 5 5 6 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 768.3 766.3 768.3 771.9 770.4 769.1 768.9 769.7 771.7 775.2 772.7 773.0 770.4 MAX. QFE PRESSURE IN HPA 774.7 772.1 772.0 776.1 774.0 773.6 772.0 772.6 774.1 780.2 777.8 778.0 780.2 DAY 1 18 29 21 17 16 19 17 3 12 23 8 MIN. QFE PRESSURE IN HPA 759.3 760.0 760.3 766.0 761.0 764.0 763.7 766.0 768.7 770.0 768.8 766.0 759.3 DAY 23 9 24 30 6 28 6 8 5 4 9 24 MEAN QNH PRESSURE IN HPA 1003.8 1001.3 1003.8 1008.2 1006.4 1004.8 1004.6 1005.5 1008.0 1012.3 1009.2 1009.6 1006.5 MAX. QNH PRESSURE IN HPA 1011.7 1008.5 1008.4 1013.5 1010.9 1010.4 1008.4 1009.1 1011.0 1018.6 1015.6 1015.8 1018.6 DAY 1 18 29 21 17 16 19 17 3 12 23 8 MIN. QNH PRESSURE IN HPA 992.6 993.5 993.9 1000.9 994.7 998.5 998.1 1000.9 1004.3 1005.9 1004.4 1000.9 992.6 DAY 23 9 24 30 6 28 6 8 5 4 9 24 MEAN QFF PRESSURE IN HPA 1011.0 1002.1 997.2 996.1 991.9 985.0 981.4 983.7 989.7 999.9 1003.6 1006.7 995.7 MAX. QFF PRESSURE IN HPA 1027.6 1018.2 1001.9 1003.6 995.9 993.6 988.2 989.9 994.2 1005.7 1011.2 1016.3 1027.6 DAY 13 15 6 9 10 4 29 17 22 31 29 28 MIN. QFF PRESSURE IN HPA 991.3 994.5 985.6 987.7 984.0 977.0 974.2 977.3 983.4 990.8 994.8 995.5 974.2 DAY 6 5 24 27 6 25 6 8 6 4 6 24 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 767.6 765.9 767.7 771.2 769.8 768.5 768.3 769.0 770.8 774.1 771.5 772.0 769.7 MAX. QFE PRESSURE IN HPA 772.9 772.0 771.6 775.4 773.5 773.4 771.6 772.0 773.1 779.7 776.3 776.3 779.7 DAY 1 18 10 20 17 6 11 17 26 12 23 8 MIN. QFE PRESSURE IN HPA 760.2 760.1 760.0 765.0 761.8 763.4 762.9 765.2 768.0 769.0 767.0 766.4 760.0 DAY 23 9 24 30 6 28 5 8 5 4 8 24 MEAN QNH PRESSURE IN HPA 1002.9 1000.8 1003.0 1007.4 1005.7 1004.1 1003.8 1004.7 1006.8 1011.0 1007.8 1008.4 1005.5 MAX. QNH PRESSURE IN HPA 1009.5 1008.4 1007.9 1012.6 1010.3 1010.1 1007.9 1008.4 1009.8 1018.0 1013.7 1013.7 1018.0 DAY 1 18 10 20 17 6 11 17 26 12 23 8 MIN. QNH PRESSURE IN HPA 993.7 993.6 993.5 999.7 995.7 997.7 997.1 999.9 1003.4 1004.7 1002.2 1001.4 993.5 DAY 23 9 24 30 6 28 5 8 5 4 8 24 MEAN QFF PRESSURE IN HPA 1008.2 1000.6 995.8 994.9 991.2 984.4 980.8 982.5 988.0 997.9 1001.0 1004.4 994.1 MAX. QFF PRESSURE IN HPA 1025.0 1015.0 999.8 1001.9 995.4 992.8 986.6 988.3 991.4 1003.5 1008.7 1014.6 1025.0 DAY 13 15 6 6 10 4 28 18 25 12 29 31 MIN. QFF PRESSURE IN HPA 988.4 994.8 985.9 985.4 984.6 976.4 974.7 977.1 983.1 989.4 993.9 996.3 974.7 DAY 3 5 24 30 6 27 6 8 6 4 8 24 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 766.7 764.9 766.5 770.3 768.9 767.5 767.5 767.9 769.6 773.2 770.7 771.0 768.7 MAX. QFE PRESSURE IN HPA 772.0 770.8 769.8 774.1 772.1 772.3 770.6 771.0 772.0 778.4 775.8 775.0 778.4 DAY 1 18 29 21 17 6 19 17 2 12 23 7 MIN. QFE PRESSURE IN HPA 760.0 759.2 759.8 764.8 761.5 762.7 761.5 764.5 767.0 768.2 765.1 765.0 759.2 DAY 23 9 24 29 5 28 5 8 15 4 8 25 MEAN QNH PRESSURE IN HPA 1001.8 999.5 1001.6 1006.3 1004.5 1002.8 1002.8 1003.4 1005.4 1009.9 1006.8 1007.2 1004.3 MAX. QNH PRESSURE IN HPA 1008.4 1006.9 1005.7 1011.0 1008.5 1008.8 1006.6 1007.1 1008.4 1016.3 1013.1 1012.1 1016.3 DAY 1 18 29 21 17 6 19 17 2 12 23 7 MIN. QNH PRESSURE IN HPA 993.5 992.5 993.2 999.4 995.3 996.8 995.3 999.1 1002.2 1003.7 999.8 999.7 992.5 DAY 23 9 24 29 5 28 5 8 15 4 8 25 MEAN QFF PRESSURE IN HPA 1006.6 998.7 994.4 994.6 990.6 983.9 980.8 982.5 987.2 997.3 1000.5 1003.3 993.4 MAX. QFF PRESSURE IN HPA 1022.9 1011.5 998.8 1000.9 994.5 991.9 986.5 988.5 991.1 1002.5 1006.4 1014.7 1022.9 DAY 13 15 28 6 10 4 29 18 28 24 29 31 MIN. QFF PRESSURE IN HPA 987.5 991.1 986.3 987.0 984.5 976.2 974.7 976.0 982.2 988.6 991.7 996.0 974.7 DAY 3 4 24 26 5 27 5 8 5 4 8 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 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 767.0 765.2 767.0 770.4 769.1 767.5 767.4 767.9 769.9 773.7 771.3 771.5 769.0 MAX. QFE PRESSURE IN HPA 772.8 771.1 770.0 774.1 772.7 772.4 770.3 771.0 772.2 778.7 776.5 776.0 778.7 DAY 1 16 10 21 18 6 19 17 2 12 23 7 MIN. QFE PRESSURE IN HPA 759.0 759.8 761.0 764.9 762.0 762.7 761.7 764.5 767.0 768.9 765.0 764.5 759.0 DAY 10 9 24 29 5 28 5 8 5 4 8 25 MEAN QNH PRESSURE IN HPA 1002.2 1000.0 1002.2 1006.5 1004.7 1002.8 1002.7 1003.3 1005.7 1010.5 1007.5 1007.8 1004.7 MAX. QNH PRESSURE IN HPA 1009.4 1007.3 1005.9 1011.0 1009.3 1008.9 1006.3 1007.1 1008.6 1016.7 1014.0 1013.4 1016.7 DAY 1 16 10 21 18 6 19 17 2 12 23 7 MIN. QNH PRESSURE IN HPA 992.2 993.2 994.7 999.6 996.0 996.8 995.6 999.1 1002.2 1004.5 999.7 999.1 992.2 DAY 10 9 24 29 5 28 5 8 5 4 8 25 MEAN QFF PRESSURE IN HPA 1009.7 1001.2 996.9 996.5 992.1 985.2 982.0 984.1 990.0 1000.8 1003.5 1006.5 995.7 MAX. QFF PRESSURE IN HPA 1027.5 1014.5 1001.0 1003.2 997.9 993.5 988.2 990.4 995.6 1006.3 1009.7 1017.3 1027.5 DAY 13 15 28 8 24 6 28 18 28 24 23 31 MIN. QFF PRESSURE IN HPA 991.3 993.9 990.5 988.9 986.6 976.8 976.1 977.7 983.8 992.1 992.1 996.6 976.1 DAY 19 21 24 26 3 28 5 8 5 4 8 17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 767.6 765.7 767.7 771.3 770.3 768.4 768.3 768.9 770.9 774.5 771.8 772.1 769.8 MAX. QFE PRESSURE IN HPA 773.3 772.0 771.4 775.0 774.0 773.0 771.1 771.5 773.4 779.0 776.3 776.6 779.0 DAY 1 17 28 20 24 6 19 17 2 11 23 7 MIN. QFE PRESSURE IN HPA 759.6 760.2 762.3 765.5 763.0 764.0 763.0 765.8 768.2 769.6 765.0 763.9 759.6 DAY 10 4 24 29 5 27 5 8 5 4 8 25 MEAN QNH PRESSURE IN HPA 1002.9 1000.6 1003.1 1007.5 1006.3 1004.0 1003.7 1004.6 1007.1 1011.4 1008.1 1008.5 1005.7 MAX. QNH PRESSURE IN HPA 1010.0 1008.4 1007.6 1012.1 1010.9 1009.6 1007.3 1007.8 1010.1 1017.1 1013.7 1014.1 1017.1 DAY 1 17 28 20 24 6 19 17 2 11 23 7 MIN. QNH PRESSURE IN HPA 993.0 993.7 996.3 1000.3 997.2 998.5 997.2 1000.7 1003.7 1005.4 999.7 998.3 993.0 DAY 10 4 24 29 5 27 5 8 5 4 8 25 MEAN QFF PRESSURE IN HPA 1009.8 1001.4 996.3 995.5 991.8 984.1 980.6 982.8 988.9 999.2 1002.7 1005.9 994.9 MAX. QFF PRESSURE IN HPA 1026.7 1016.4 1002.3 1002.7 997.2 992.7 986.3 989.6 992.6 1004.0 1009.6 1016.8 1026.7 DAY 13 15 28 8 24 3 28 17 30 24 29 31 MIN. QFF PRESSURE IN HPA 991.3 990.8 988.6 987.0 985.1 976.1 974.0 976.6 982.8 990.3 993.2 994.5 974.0 DAY 19 21 23 29 5 27 5 8 5 4 8 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 767.1 765.5 767.7 771.1 770.2 768.4 768.4 769.0 770.7 774.3 771.6 771.8 769.6 MAX. QFE PRESSURE IN HPA 772.5 772.0 771.8 775.1 774.0 772.9 771.1 772.0 773.4 778.8 776.2 776.0 778.8 DAY 1 17 28 20 24 6 28 16 2 11 23 7 MIN. QFE PRESSURE IN HPA 757.2 759.4 761.3 766.0 762.2 763.9 763.0 765.5 768.0 769.9 765.5 763.0 757.2 DAY 22 8 23 29 5 27 5 8 5 4 8 25 MEAN QNH PRESSURE IN HPA 1002.3 1000.3 1003.0 1007.2 1006.1 1003.9 1003.9 1004.7 1006.8 1011.2 1007.9 1008.1 1005.5 MAX. QNH PRESSURE IN HPA 1009.0 1008.4 1008.1 1012.2 1010.9 1009.5 1007.3 1008.4 1010.1 1016.8 1013.6 1013.4 1016.8 DAY 1 17 28 20 24 6 28 16 2 11 23 7 MIN. QNH PRESSURE IN HPA 990.0 992.7 995.1 1000.9 996.2 998.3 997.2 1000.3 1003.4 1005.8 1000.3 997.2 990.0 DAY 22 8 23 29 5 27 5 8 5 4 8 25 MEAN QFF PRESSURE IN HPA 1007.5 1000.1 995.6 994.8 991.5 984.1 980.9 982.6 988.1 998.3 1001.2 1004.4 994.1 MAX. QFF PRESSURE IN HPA 1024.9 1013.2 1000.6 1002.9 996.3 991.4 987.4 988.1 992.6 1003.4 1007.8 1017.4 1024.9 DAY 13 15 28 8 24 3 28 17 30 30 29 31 MIN. QFF PRESSURE IN HPA 990.0 990.2 986.1 986.7 983.9 977.2 974.5 976.6 982.8 989.4 993.6 993.6 974.5 DAY 22 4 23 29 5 27 5 8 5 4 7 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1988-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.3 1.4 6.0 12.0 17.3 22.8 25.4 24.5 20.4 14.1 7.6 2.6 12.7 MINIMUN AIR TEMPERATURE (C) -7.7 -5.2 -1.4 3.3 6.5 9.5 13.0 11.6 7.4 3.0 -0.9 -4.2 2.9 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 DAYS WITH MINIMUM TEMP. <=-4 22.1 16.3 8.8 1.4 0.0 0.0 0.0 0.0 0.0 0.1 8.1 15.1 71.9 DAYS WITH FREEZING MIN.<= 0 28.9 23.8 20.1 6.9 0.6 0.0 0.0 0.0 0.2 5.7 18.9 24.3 129.4 TEMPERATURE RECORDS LOWEST(C) -26.8 -22.6 -11.2 -7.0 -1.8 1.4 6.2 6.0 -1.4 -4.0 -14.0 -23.0 -26.8 YEAR-DAY 96-26 88- 6 92-11 88- 3 97- 6 93- 5 0-21 96- 4 94-22 5-25 95-28 4-30 96-26 MAXIMUM AIR TEMPERATURE (C) 3.8 6.4 11.0 17.1 22.7 28.7 31.5 31.0 27.2 20.7 13.4 8.0 18.4 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.0 0.0 0.2 9.8 22.6 23.6 5.2 0.0 0.0 0.0 61.4 DAYS WITH MAXIMUM TEMP. <= 0 5.7 1.9 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.8 9.5 TEMPERATURE RECORDS HIGHEST(C) 15.0 16.0 20.4 25.6 30.4 34.0 36.6 35.6 32.2 27.0 21.0 20.0 36.6 YEAR-DAY 3-12 4-29 4- 9 5-24 99-31 89-27 91- 9 94- 5 88-11 89- 9 90- 4 98-10 91- 9 DIF. BETWEEN (MAX.-MIN.) (C) 11.5 11.6 12.4 13.8 16.2 19.2 18.5 19.4 19.8 17.7 14.3 12.2 15.5 MEAN DAILY TEMP. (MDT) (C) -1.9 0.6 4.8 10.2 14.6 19.1 22.2 21.3 17.3 11.9 6.2 1.9 10.7 STANDARD DEVIATION OF MDT(C) 2.74 1.92 1.45 1.28 1.06 0.79 1.13 0.77 1.10 1.00 0.99 2.66 1.41 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 4.7 50.9 24.5 0.2 0.0 0.0 0.0 80.3 HEATING DEG. DAYS(BASE 18 0C) 617.9 490.7 409.7 233.5 106.9 9.9 0.1 0.5 39.5 190.4 353.5 498.5 2951.1 DEWPOINT (MEAN C) -9.0 -8.4 -6.2 -2.9 -0.9 -0.8 2.3 0.8 -2.2 -3.2 -5.1 -7.0 -3.6 MIXING RATIO (G/KG) 2.68 2.81 3.35 4.22 4.83 4.86 6.07 5.44 4.39 4.09 3.58 3.11 4.12 VAPOUR PRESSURE (HPA) 3.32 3.47 4.14 5.23 5.99 6.00 7.48 6.72 5.46 5.09 4.46 3.86 5.10 SATURATION DEF. (HPA) 2.73 3.76 5.77 9.58 14.96 23.34 27.00 26.13 20.37 12.18 6.67 4.11 13.05 RELATIVE HUMIDITY (MEAN %) 60 53 47 40 33 24 24 23 24 34 45 54 38 RELATIVE HUMIDITY (MAX. %) 77 73 69 63 55 42 40 38 38 52 66 74 57 RELATIVE HUMIDITY (MIN. %) 45 36 31 26 21 15 16 16 16 22 29 37 26 RELATIVE HUMIDITY (MEAN% 03UTC) 73 69 66 60 54 42 40 38 38 51 63 70 55 RELATIVE HUMIDITY (MEAN% 09UTC) 52 44 38 31 24 17 19 17 18 25 35 45 30 RELATIVE HUMIDITY (MEAN% 15UTC) 58 48 41 35 27 18 19 18 20 30 41 52 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 45.4 33.6 54.1 27.4 8.9 1.2 0.8 0.1 0.2 5.2 23.7 53.7 254.3 DAYS WITH PRECIPITATION >=10 1.6 1.1 1.9 1.1 0.1 0.0 0.0 0.0 0.0 0.1 0.7 1.8 8.4 DAYS WITH PRECIPITATION >= 5 3.2 2.0 3.3 1.7 0.7 0.1 0.0 0.0 0.0 0.3 1.7 3.2 16.2 DAYS WITH PRECIPITATION >= 1 5.5 4.5 6.2 3.6 2.1 0.3 0.3 0.0 0.1 1.0 3.5 6.1 33.2 DAYS WITH PRECIPITATION 8.6 6.4 8.1 5.7 3.5 0.9 0.8 0.3 0.2 1.9 4.8 7.7 48.9 GREATEST DAILY PRECIPITATION 45.2 55.0 51.0 32.0 14.0 5.0 2.0 0.4 2.0 25.0 39.0 72.0 72.0 YEAR-DAY 4- 7 93- 3 98-18 90- 3 93- 6 95- 1 93-30 96-30 4-20 98-11 94-17 89- 4 89 DAY WITH THUNDER STORM 0.1 0.1 0.4 0.7 0.3 0.3 0.1 0.1 0.1 0.2 0.1 0.1 2.6 DAYS WITH SNOW OR SLEET 6.3 3.6 2.4 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.7 3.4 16.7 DAYS WITH DUST 0.1 0.0 0.9 0.5 2.4 1.4 0.7 0.6 1.4 0.7 0.3 0.1 9.1 WIND DIRECTION (PREVAILING) 225 270 270 270 270 270 90 90 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.4 9.6 9.5 10.0 10.1 9.5 8.5 7.8 8.9 9.1 9.5 9.2 9.4 PREVAILING WIND PERCENT 12.1 18.3 22.2 23.7 26.0 18.6 12.4 15.4 12.7 18.0 13.9 12.7 16.2 CALMS PERCENT OF WIND 60.8 46.0 40.4 39.0 43.1 49.7 51.1 52.9 53.2 54.6 56.7 59.8 50.6 NO. OF WIND OBSERVATION 170.5 155.6 170.5 165.0 170.5 165.0 170.5 170.4 165.0 170.5 165.0 170.5 2009.0 VECTOR WIND DIRECTION (MEAN) 226 232 236 244 254 250 118 81 249 260 236 230 239 VECTOR WIND MAGNITUDE(KNOTS) 2.2 3.5 4.2 4.3 3.9 2.0 0.5 1.0 0.8 1.6 2.2 2.4 2.1 WIND STEADINESES (MEAN %) 64.7 70.0 71.2 71.7 69.6 43.5 11.9 25.6 20.5 42.1 57.9 64.9 46.7 WIND SPEED (MEAN KNOTS) 3.4 5.0 5.9 6.0 5.6 4.6 4.2 3.9 3.9 3.8 3.8 3.7 4.5 FASTEST WIND DIRECTION 170 240 260 160 280 250 270 300 240 260 230 220 260 FASTEST WIND SPEED (KNOTS) 31 25 39 27 35 29 39 23 25 29 31 29 39 YEAR-DAY 5- 3 4- 4 98-25 4-17 92-20 93- 1 4-12 1-12 95-20 4-14 92-25 3-27 98 DAYS WITH SKY CLEAR (0-2)/8 15.8 14.9 13.3 11.0 18.7 26.7 23.8 25.3 27.3 23.6 16.1 15.7 232.2 DAYS WITH P.CLOUDY (3-6)/8 11.0 10.6 13.1 15.3 11.2 3.2 7.2 5.7 2.7 6.8 11.4 11.9 110.1 DAYS WITH CLOUDY (7-8)/8 4.2 2.8 4.6 3.7 1.1 0.1 0.0 0.1 0.0 0.6 2.5 3.3 23.0 DAYS WITH VISIBILITY =< 2 KM 2.8 0.8 1.2 0.2 0.1 0.0 0.0 0.0 0.0 0.0 0.6 1.5 7.2 DURATION OF SUNSHINE HOURS 215.0 226.8 242.8 256.4 333.4 359.8 342.3 341.5 319.2 293.6 230.0 219.4 3380.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1988-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 774.8 774.2 774.4 776.4 777.1 775.5 774.5 776.1 778.2 780.2 778.7 776.9 776.4 MAX. QFE PRESSURE IN HPA 785.4 785.2 785.5 787.8 786.4 783.9 784.1 784.8 787.4 788.0 788.5 789.3 789.3 YEAR-DAY 95- 7 98-23 90-10 98-12 99-28 98- 6 0-30 99-20 94-23 93-17 96-18 98-10 98-10 MIN. QFE PRESSURE IN HPA 754.9 758.8 759.8 758.0 759.8 762.7 761.5 764.5 766.9 768.2 763.1 761.1 754.9 YEAR-DAY 5-23 3-19 5-24 4-17 4-13 5-28 5- 5 5- 8 4-16 5- 4 4-23 2-22 5-23 MEAN QNH PRESSURE IN HPA 1011.8 1011.1 1011.4 1013.9 1014.7 1012.7 1011.5 1013.5 1016.1 1018.6 1016.7 1014.5 1013.9 MAX. QNH PRESSURE IN HPA 1025.0 1024.8 1025.1 1028.0 1026.3 1023.2 1023.4 1024.3 1027.5 1028.3 1028.9 1029.9 1029.9 YEAR-DAY 95- 7 98-23 90-10 98-12 99-28 98- 6 0-30 99-20 94-23 93-17 96-18 98-10 98-10 MIN. QNH PRESSURE IN HPA 987.1 992.0 993.2 991.0 993.2 996.8 995.3 999.1 1002.1 1003.7 997.3 994.9 987.1 YEAR-DAY 5-23 3-19 5-24 4-17 4-13 5-28 5- 5 5- 8 4-16 5- 4 4-23 2-22 5-23 MEAN QFF PRESSURE IN HPA 1005.8 1001.0 998.5 996.0 992.5 985.8 982.3 984.9 991.5 1000.0 1002.7 1006.2 995.6 MAX. QFF PRESSURE IN HPA 1027.6 1018.2 1015.6 1005.5 1004.4 997.5 993.0 995.7 1003.5 1010.5 1021.0 1032.6 1032.6 YEAR-DAY 5-13 5-15 3- 2 3- 3 3- 2 3- 2 4-18 3-12 3-27 3-16 3-25 4-30 4-30 MIN. QFF PRESSURE IN HPA 986.2 986.6 983.6 981.3 978.4 976.1 974.0 976.0 982.2 988.4 987.2 992.0 974.0 YEAR-DAY 5-23 3-19 5-24 4-17 4-13 5-27 5- 5 5- 8 5- 5 5- 5 4-23 4-15 5- 5 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 768.2 767.2 768.7 770.0 770.2 769.1 768.4 769.8 772.1 774.7 772.0 770.7 770.1 MAX. QFE PRESSURE IN HPA 777.7 775.9 777.0 778.8 775.0 774.7 772.8 775.0 777.8 779.2 780.0 777.0 780.0 YEAR-DAY 3-12 4-10 4- 9 3- 8 3-21 3- 4 4-18 3-12 3-23 3-16 3-26 3-12 3-26 MIN. QFE PRESSURE IN HPA 755.0 758.8 759.8 760.9 760.4 763.8 763.0 765.0 767.9 769.8 763.1 762.7 755.0 YEAR-DAY 5-23 3-19 5-24 4- 1 5- 6 5-28 5- 6 5- 8 5- 5 5- 4 4-24 4-16 5-23 MEAN QNH PRESSURE IN HPA 1003.7 1002.4 1004.3 1005.9 1006.2 1004.8 1003.9 1005.7 1008.5 1011.8 1008.4 1006.8 1006.0 MAX. QNH PRESSURE IN HPA 1015.5 1013.2 1014.6 1016.8 1012.1 1011.7 1009.4 1012.1 1015.6 1017.3 1018.3 1014.6 1018.3 YEAR-DAY 3-12 4-10 4- 9 3- 8 3-21 3- 4 4-18 3-12 3-23 3-16 3-26 3-12 3-26 MIN. QNH PRESSURE IN HPA 987.3 992.0 993.2 994.6 994.0 998.2 997.2 999.7 1003.3 1005.7 997.3 996.8 987.3 YEAR-DAY 5-23 3-19 5-24 4- 1 5- 6 5-28 5- 6 5- 8 5- 5 5- 4 4-24 4-16 5-23 MEAN QFF PRESSURE IN HPA 1004.5 999.9 997.5 995.1 992.2 986.1 982.3 985.0 991.1 999.3 1001.7 1004.6 995.0 MAX. QFF PRESSURE IN HPA 1022.5 1014.7 1013.1 1002.3 1002.7 995.4 991.4 994.1 1001.0 1005.8 1016.6 1027.0 1027.0 YEAR-DAY 5-14 3- 1 3- 3 4-12 3- 2 4- 1 3- 3 3-12 4-27 4-27 3-25 4-30 4-30 MIN. QFF PRESSURE IN HPA 986.2 986.7 983.6 983.3 980.7 977.4 975.1 976.9 982.9 988.4 987.2 992.1 975.1 YEAR-DAY 5-23 3-19 5-24 4-17 4-13 5-27 3-26 5- 8 5- 6 5- 5 4-23 4-15 3-26 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 774.7 774.1 774.5 776.6 777.4 776.0 775.2 776.8 778.7 780.6 778.9 776.9 776.7 MAX. QFE PRESSURE IN HPA 784.4 783.9 784.8 787.0 785.8 783.5 783.9 784.1 787.0 787.4 787.9 788.8 788.8 YEAR-DAY 95- 7 98-23 1- 2 98-12 99-28 99- 2 96- 4 99-20 94-23 93-17 96-19 98-10 98-10 MIN. QFE PRESSURE IN HPA 754.9 759.0 759.8 759.7 761.2 763.8 763.0 765.6 767.9 769.6 764.2 761.1 754.9 YEAR-DAY 5-23 3-19 5-24 4-17 5- 6 5-28 5- 6 5- 8 5- 5 5- 4 4-23 2-22 5-23 MEAN QNH PRESSURE IN HPA 1011.7 1010.9 1011.5 1014.1 1015.1 1013.4 1012.3 1014.3 1016.8 1019.1 1016.9 1014.4 1014.2 MAX. QNH PRESSURE IN HPA 1023.8 1023.2 1024.3 1027.0 1025.5 1022.7 1023.2 1023.4 1027.0 1027.5 1028.1 1029.2 1029.2 YEAR-DAY 95- 7 98-23 1- 2 98-12 99-28 99- 2 96- 4 99-20 94-23 93-17 96-19 98-10 98-10 MIN. QNH PRESSURE IN HPA 987.1 992.2 993.2 993.1 995.0 998.2 997.2 1000.4 1003.3 1005.4 998.7 994.9 987.1 YEAR-DAY 5-23 3-19 5-24 4-17 5- 6 5-28 5- 6 5- 8 5- 5 5- 4 4-23 2-22 5-23 MEAN QFF PRESSURE IN HPA 1015.4 1012.0 1008.2 1005.7 1002.2 996.2 992.8 996.1 1002.7 1010.3 1013.1 1014.7 1005.8 MAX. QFF PRESSURE IN HPA 1045.0 1037.2 1026.0 1020.1 1014.7 1008.8 1006.6 1008.5 1020.5 1022.7 1028.7 1038.8 1045.0 YEAR-DAY 96-26 88- 7 92-13 98-12 97- 6 95- 1 0-31 96-31 94-23 92-30 96-19 90-29 96-26 MIN. QFF PRESSURE IN HPA 986.2 988.2 986.4 982.5 980.7 978.4 977.4 979.4 985.7 992.8 990.6 992.6 977.4 YEAR-DAY 5-23 3-19 5-24 4-17 4-16 5-28 5- 6 5- 8 5- 5 5- 5 4-23 2-21 5- 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1988-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 775.7 775.0 775.3 777.3 777.9 776.3 775.4 777.2 779.3 781.4 779.8 777.9 777.4 MAX. QFE PRESSURE IN HPA 785.4 785.2 785.5 787.8 786.4 783.9 784.1 784.8 787.4 788.0 788.5 789.3 789.3 YEAR-DAY 95- 7 98-23 90-10 98-12 99-28 98- 6 0-30 99-20 94-23 93-17 96-18 98-10 98-10 MIN. QFE PRESSURE IN HPA 759.3 760.0 760.3 758.0 761.0 764.0 763.7 766.0 768.7 770.0 765.0 763.0 758.0 YEAR-DAY 5-23 3-19 5-24 4-17 5- 6 5-28 5- 6 5- 8 5- 5 5- 4 4-23 2-22 4-17 MEAN QNH PRESSURE IN HPA 1013.0 1012.2 1012.5 1014.9 1015.7 1013.7 1012.6 1014.8 1017.5 1020.0 1018.0 1015.7 1015.1 MAX. QNH PRESSURE IN HPA 1025.0 1024.8 1025.1 1028.0 1026.3 1023.2 1023.4 1024.3 1027.5 1028.3 1028.9 1029.9 1029.9 YEAR-DAY 95- 7 98-23 90-10 98-12 99-28 98- 6 0-30 99-20 94-23 93-17 96-18 98-10 98-10 MIN. QNH PRESSURE IN HPA 992.6 993.5 993.9 991.0 994.7 998.5 998.1 1000.9 1004.3 1005.9 999.7 997.2 991.0 YEAR-DAY 5-23 3-19 5-24 4-17 5- 6 5-28 5- 6 5- 8 5- 5 5- 4 4-23 2-22 4-17 MEAN QFF PRESSURE IN HPA 1007.8 1002.4 999.7 996.5 992.8 985.8 982.4 985.1 992.3 1000.9 1004.0 1007.8 996.5 MAX. QFF PRESSURE IN HPA 1027.6 1018.2 1013.8 1005.1 1003.2 994.1 990.7 993.1 1001.9 1007.6 1020.6 1032.6 1032.6 YEAR-DAY 5-13 5-15 3- 3 3- 8 3- 2 3- 4 4-18 3-12 4-27 4-27 3-25 4-30 4-30 MIN. QFF PRESSURE IN HPA 991.3 990.8 985.6 981.3 981.9 977.0 974.2 977.2 983.4 990.8 991.6 995.1 974.2 YEAR-DAY 5- 6 3-20 5-24 4-17 4-13 5-25 5- 6 4- 4 5- 6 5- 4 4-23 4-16 5- 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 774.8 774.4 774.7 776.7 777.3 775.6 774.7 776.3 778.3 780.2 778.6 776.8 776.5 MAX. QFE PRESSURE IN HPA 784.1 784.7 784.8 787.1 785.7 783.0 784.0 783.5 786.9 786.4 787.2 787.8 787.8 YEAR-DAY 95- 7 98-23 1- 1 98-12 98- 8 98- 6 0-30 99-19 94-23 93-17 96-18 98- 9 98- 9 MIN. QFE PRESSURE IN HPA 760.0 759.7 760.0 759.0 760.8 763.4 762.9 765.2 768.0 769.0 763.8 762.0 759.0 YEAR-DAY 3-28 3-19 5-24 4-17 4-13 5-28 5- 5 5- 8 4-16 5- 4 4-23 2-21 4-17 MEAN QNH PRESSURE IN HPA 1011.9 1011.4 1011.8 1014.2 1014.9 1012.9 1011.7 1013.8 1016.2 1018.6 1016.6 1014.3 1014.0 MAX. QNH PRESSURE IN HPA 1023.4 1024.2 1024.3 1027.1 1025.4 1022.0 1023.3 1022.7 1026.9 1026.3 1027.3 1028.0 1028.0 YEAR-DAY 95- 7 98-23 1- 1 98-12 98- 8 98- 6 0-30 99-19 94-23 93-17 96-18 98- 9 98- 9 MIN. QNH PRESSURE IN HPA 993.5 993.1 993.5 992.2 994.5 997.7 997.1 999.9 1003.4 1004.7 998.2 996.0 992.2 YEAR-DAY 3-28 3-19 5-24 4-17 4-13 5-28 5- 5 5- 8 4-16 5- 4 4-23 2-21 4-17 MEAN QFF PRESSURE IN HPA 1005.2 1000.7 998.1 995.6 992.1 985.3 981.7 984.0 990.5 998.9 1001.6 1005.3 994.9 MAX. QFF PRESSURE IN HPA 1025.0 1015.0 1013.4 1003.2 1002.6 994.8 991.0 992.8 1000.8 1006.0 1017.9 1027.4 1027.4 YEAR-DAY 5-13 5-15 3- 2 3- 3 3- 1 3- 1 4-18 3-11 3-27 3-15 3-25 4-30 4-30 MIN. QFF PRESSURE IN HPA 988.4 988.4 985.9 982.7 979.1 976.4 974.7 977.1 983.1 989.4 990.7 993.2 974.7 YEAR-DAY 5- 3 3-19 5-24 4-17 4-13 5-27 5- 6 4- 4 5- 6 5- 4 4-23 4-16 5- 6 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 774.1 773.4 773.7 775.7 776.4 774.7 773.7 775.2 777.1 779.2 777.8 776.1 775.6 MAX. QFE PRESSURE IN HPA 783.4 783.3 783.4 785.8 784.6 782.2 783.1 782.1 786.0 785.7 786.9 787.1 787.1 YEAR-DAY 95- 7 91-15 1- 1 98-12 98- 8 99- 1 0-30 98-29 94-23 93-17 96-18 98- 9 98- 9 MIN. QFE PRESSURE IN HPA 757.0 759.0 759.8 759.6 759.8 762.7 761.5 764.5 766.9 768.2 763.8 761.3 757.0 YEAR-DAY 3-28 3-19 5-24 4-17 4-13 5-28 5- 5 5- 8 4-16 5- 4 4-23 2-21 3-28 MEAN QNH PRESSURE IN HPA 1010.9 1010.2 1010.4 1013.0 1013.8 1011.7 1010.5 1012.3 1014.8 1017.4 1015.6 1013.5 1012.9 MAX. QNH PRESSURE IN HPA 1022.5 1022.4 1022.5 1025.5 1024.0 1021.1 1022.2 1020.9 1025.8 1025.4 1026.9 1027.1 1027.1 YEAR-DAY 95- 7 91-15 1- 1 98-12 98- 8 99- 1 0-30 98-29 94-23 93-17 96-18 98- 9 98- 9 MIN. QNH PRESSURE IN HPA 989.8 992.2 993.2 993.0 993.2 996.8 995.3 999.1 1002.1 1003.7 998.2 995.1 989.8 YEAR-DAY 3-28 3-19 5-24 4-17 4-13 5-28 5- 5 5- 8 4-16 5- 4 4-23 2-21 3-28 MEAN QFF PRESSURE IN HPA 1003.9 999.2 996.9 995.2 991.6 985.0 981.5 983.9 989.9 998.3 1001.0 1004.2 994.2 MAX. QFF PRESSURE IN HPA 1022.9 1011.9 1011.7 1003.4 1002.1 995.0 990.7 993.4 999.3 1004.8 1016.9 1024.1 1024.1 YEAR-DAY 5-13 4- 9 3- 2 4-11 3- 2 3- 1 4-18 3-11 3-27 3-16 3-25 4-30 4-30 MIN. QFF PRESSURE IN HPA 987.4 986.6 984.0 983.2 978.4 976.2 974.7 976.0 982.2 988.6 988.8 992.0 974.7 YEAR-DAY 3-28 3-19 3-12 4-17 4-13 5-27 5- 5 5- 8 5- 5 5- 4 4-23 4-15 5- 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1988-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 774.7 774.0 774.1 776.0 776.6 774.8 773.7 775.2 777.4 779.8 778.4 776.8 775.9 MAX. QFE PRESSURE IN HPA 784.0 784.0 784.2 785.1 784.5 782.5 782.8 782.0 786.0 786.0 787.9 788.3 788.3 YEAR-DAY 95- 7 98-23 90- 9 98-12 99-28 99- 1 0-30 98-28 94-23 93-17 96-18 98- 9 98- 9 MIN. QFE PRESSURE IN HPA 757.2 759.8 761.0 760.5 760.1 762.7 761.7 764.5 767.0 768.9 764.0 761.6 757.2 YEAR-DAY 3-28 5- 9 5-24 4-17 4-13 5-28 5- 5 5- 8 5- 5 5- 4 4-27 2-21 3-28 MEAN QNH PRESSURE IN HPA 1011.7 1010.8 1011.0 1013.4 1014.1 1011.8 1010.5 1012.3 1015.1 1018.0 1016.4 1014.4 1013.3 MAX. QNH PRESSURE IN HPA 1023.3 1023.3 1023.5 1024.7 1023.9 1021.4 1021.8 1020.8 1025.8 1025.8 1028.1 1028.6 1028.6 YEAR-DAY 95- 7 98-23 90- 9 98-12 99-28 99- 1 0-30 98-28 94-23 93-17 96-18 98- 9 98- 9 MIN. QNH PRESSURE IN HPA 990.0 993.2 994.7 994.1 993.6 996.8 995.6 999.1 1002.2 1004.5 998.5 995.5 990.0 YEAR-DAY 3-28 5- 9 5-24 4-17 4-13 5-28 5- 5 5- 8 5- 5 5- 4 4-27 2-21 3-28 MEAN QFF PRESSURE IN HPA 1015.3 1011.8 1007.7 1005.0 1001.1 994.6 990.9 993.9 1000.8 1009.2 1012.6 1014.6 1004.8 MAX. QFF PRESSURE IN HPA 1043.4 1036.4 1025.2 1019.6 1013.1 1008.9 1004.6 1006.5 1018.5 1021.2 1027.7 1041.0 1043.4 YEAR-DAY 96-26 88- 7 92-12 94- 5 97- 6 92- 7 0-30 96-30 94-23 92-29 96-19 97-22 96-26 MIN. QFF PRESSURE IN HPA 988.3 989.6 987.3 985.8 980.9 976.8 976.1 977.7 983.8 992.1 990.3 991.3 976.1 YEAR-DAY 3-28 3-20 3-12 2- 3 4-13 5-28 5- 5 5- 8 5- 5 5- 4 4-23 2-21 5- 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 768.8 767.9 769.5 771.0 770.9 769.3 768.7 770.0 772.4 775.1 772.5 771.4 770.6 MAX. QFE PRESSURE IN HPA 778.2 775.5 777.4 779.0 776.0 775.5 772.8 775.1 777.1 779.8 781.0 776.8 781.0 YEAR-DAY 3- 7 4-10 4- 8 3- 7 3-10 3- 3 3- 3 3-11 3-26 3-15 3-25 3-11 3-25 MIN. QFE PRESSURE IN HPA 758.0 760.2 762.0 763.0 761.5 764.0 763.0 765.6 768.2 769.6 764.0 762.8 758.0 YEAR-DAY 3-28 5- 4 3-12 4-17 4-13 5-27 5- 5 4- 3 5- 5 5- 4 4-23 4-16 3-28 MEAN QNH PRESSURE IN HPA 1004.4 1003.2 1005.2 1007.1 1007.1 1005.0 1004.3 1005.9 1008.9 1012.3 1009.0 1007.6 1006.7 MAX. QNH PRESSURE IN HPA 1016.1 1012.7 1015.1 1017.1 1013.4 1012.7 1009.4 1012.2 1014.7 1018.1 1019.6 1014.4 1019.6 YEAR-DAY 3- 7 4-10 4- 8 3- 7 3-10 3- 3 3- 3 3-11 3-26 3-15 3-25 3-11 3-25 MIN. QNH PRESSURE IN HPA 991.0 993.7 996.0 997.2 995.3 998.5 997.2 1000.4 1003.7 1005.4 998.5 997.0 991.0 YEAR-DAY 3-28 5- 4 3-12 4-17 4-13 5-27 5- 5 4- 3 5- 5 5- 4 4-23 4-16 3-28 MEAN QFF PRESSURE IN HPA 1006.9 1001.8 998.8 996.2 992.4 985.0 981.6 984.2 991.3 1000.0 1003.1 1007.2 995.7 MAX. QFF PRESSURE IN HPA 1026.7 1016.4 1014.9 1004.0 1002.7 994.8 989.9 992.5 1001.6 1006.1 1018.4 1030.8 1030.8 YEAR-DAY 5-13 5-15 3- 2 3- 8 3- 2 3- 3 4-18 3-11 4-27 3-15 3-25 4-29 4-29 MIN. QFF PRESSURE IN HPA 988.9 990.8 987.0 987.0 982.1 976.1 974.0 976.6 982.8 990.3 989.7 994.5 974.0 YEAR-DAY 3-28 3-20 4-31 5-29 4-12 5-27 5- 5 5- 8 5- 5 5- 4 4-27 5-23 5- 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 768.5 767.6 769.2 770.7 770.9 769.3 768.8 770.1 772.4 775.0 772.3 771.0 770.5 MAX. QFE PRESSURE IN HPA 777.3 775.8 777.2 779.0 775.6 775.1 773.0 775.5 778.0 779.2 780.9 777.0 780.9 YEAR-DAY 3-11 4- 9 4- 8 3- 7 3-10 3- 3 4-17 3-11 3-22 3-15 3-25 3-11 3-25 MIN. QFE PRESSURE IN HPA 757.2 759.4 761.3 763.8 761.2 763.9 763.0 765.5 768.0 769.9 763.1 762.8 757.2 YEAR-DAY 5-22 5- 8 5-23 4-17 4-13 5-27 5- 5 5- 8 5- 5 5- 4 4-23 4-16 5-22 MEAN QNH PRESSURE IN HPA 1004.0 1002.9 1004.9 1006.8 1007.0 1005.0 1004.4 1006.1 1008.9 1012.1 1008.8 1007.2 1006.5 MAX. QNH PRESSURE IN HPA 1015.0 1013.1 1014.8 1017.1 1012.9 1012.2 1009.6 1012.7 1015.8 1017.3 1019.4 1014.6 1019.4 YEAR-DAY 3-11 4- 9 4- 8 3- 7 3-10 3- 3 4-17 3-11 3-22 3-15 3-25 3-11 3-25 MIN. QNH PRESSURE IN HPA 990.0 992.7 995.1 998.2 995.0 998.3 997.2 1000.3 1003.4 1005.8 997.3 997.0 990.0 YEAR-DAY 5-22 5- 8 5-23 4-17 4-13 5-27 5- 5 5- 8 5- 5 5- 4 4-23 4-16 5-22 MEAN QFF PRESSURE IN HPA 1005.0 1000.5 997.7 995.6 992.3 985.2 981.7 984.2 990.7 999.2 1001.8 1005.4 994.9 MAX. QFF PRESSURE IN HPA 1024.9 1014.7 1014.7 1002.9 1002.1 994.4 989.6 992.3 999.5 1006.0 1017.0 1028.9 1028.9 YEAR-DAY 5-13 4- 9 3- 2 5- 8 3- 1 3- 3 4-17 3-11 3-26 3-15 3-25 4-29 4-29 MIN. QFF PRESSURE IN HPA 990.0 990.2 984.3 986.7 980.8 977.2 974.5 976.6 982.8 989.4 990.1 993.6 974.5 YEAR-DAY 5-22 5- 4 4-31 5-29 4-12 5-27 5- 5 5- 8 5- 5 5- 4 4-23 5-25 5- 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 1 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 0.2 -0.6 7.3 12.0 18.6 22.5 26.0 24.3 20.8 15.3 7.7 4.1 13.2 1989 -4.6 -2.6 5.4 11.0 16.9 24.0 23.9 23.1 20.6 15.1 8.1 2.3 11.9 1990 -2.8 1.2 6.7 12.0 19.3 23.9 25.0 25.7 22.0 14.5 9.3 3.5 13.4 1991 1.1 2.0 6.4 12.9 17.4 22.9 26.5 25.1 20.8 13.2 8.1 2.3 13.2 1992 -5.7 -1.8 2.5 10.0 15.2 21.5 25.5 23.1 18.3 13.3 8.3 2.4 11.1 1993 -0.8 0.8 4.5 11.1 16.0 22.4 24.4 23.9 20.8 12.7 8.3 6.2 12.5 1994 1.1 2.5 6.6 12.8 16.8 23.4 27.4 26.7 17.9 12.5 8.2 1.9 13.2 1995 3.0 2.8 6.3 11.0 16.4 21.6 26.9 25.4 20.4 13.9 8.9 -3.7 12.7 1996 -5.8 3.5 4.9 11.8 17.8 23.5 23.0 23.6 21.0 13.7 6.9 4.2 12.3 1997 -0.8 1.6 3.6 9.8 16.4 22.2 27.5 25.9 20.5 14.7 5.5 -1.0 12.2 1998 -3.1 1.6 6.8 13.3 18.4 23.4 26.1 25.2 21.5 15.0 10.2 8.4 13.9 1999 0.2 3.6 4.9 12.8 19.6 25.0 25.9 25.0 21.8 15.6 8.6 4.2 13.9 2000 0.2 -0.5 6.4 15.5 20.3 24.1 25.2 24.6 21.6 14.2 5.7 3.1 13.4 2001 0.0 2.9 8.1 14.8 19.0 23.9 26.2 24.6 20.7 15.9 7.6 4.7 14.0 2002 0.8 4.2 8.3 11.9 18.7 23.0 25.5 25.8 22.6 15.7 6.8 2.2 13.8 2003 -0.5 2.7 5.4 11.6 14.8 20.9 25.4 22.7 18.7 13.5 5.6 2.3 11.9 2004 0.8 2.6 7.2 9.2 15.5 21.1 22.5 23.5 18.2 12.4 7.1 -2.8 11.4 2005 -6.4 -0.8 6.6 12.2 14.9 21.0 24.7 23.1 19.4 12.9 5.7 2.9 11.4 MEAN -1.3 1.4 6.0 12.0 17.3 22.8 25.4 24.5 20.4 14.1 7.6 2.6 12.7 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 2 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M AVERAGE OF MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 -5.5 -7.4 0.1 3.6 7.1 8.3 12.8 11.2 6.2 3.2 -1.4 -3.0 2.9 1989 -11.2 -9.6 -1.4 1.5 5.6 9.4 12.2 11.4 7.5 2.2 0.3 -3.7 2.0 1990 -9.4 -4.7 -1.4 3.2 6.8 9.2 12.9 12.3 7.0 1.8 -2.3 -4.9 2.5 1991 -5.0 -4.7 -0.7 2.6 5.2 9.0 12.0 10.5 6.6 3.5 -2.0 -2.6 2.9 1992 -12.5 -7.7 -3.9 2.6 7.0 9.0 13.2 10.9 5.6 0.2 0.1 -2.6 1.8 1993 -6.4 -5.0 -1.4 2.6 6.1 8.5 11.2 11.0 6.8 1.6 0.5 -3.1 2.7 1994 -5.6 -5.7 -1.4 2.8 6.1 8.8 14.3 12.4 5.3 2.7 1.8 -5.0 3.0 1995 -5.1 -4.0 -2.3 2.6 6.1 8.5 13.0 11.0 7.2 2.3 -1.5 -11.6 2.2 1996 -12.5 -2.3 -0.8 3.3 7.0 10.3 11.6 11.0 7.6 2.6 -2.4 -3.1 2.7 1997 -7.9 -5.9 -2.9 1.4 5.6 9.4 14.4 11.9 7.3 4.3 -1.6 -8.0 2.3 1998 -9.3 -4.2 -0.7 4.5 7.8 10.5 14.3 12.8 9.0 3.8 -1.0 -0.5 3.9 1999 -5.7 -3.7 -2.6 3.8 7.0 11.1 13.3 12.2 7.7 3.6 0.3 -4.9 3.5 2000 -6.4 -8.1 -2.0 5.4 7.2 9.8 12.3 11.6 8.3 3.3 -1.5 -2.9 3.1 2001 -7.7 -5.0 -1.9 3.7 7.6 10.1 13.3 11.2 7.7 5.1 -1.4 -1.0 3.5 2002 -5.3 -3.6 -1.5 4.6 7.0 9.5 12.3 11.3 8.6 3.3 -1.5 -3.5 3.4 2003 -6.0 -2.3 -1.0 4.6 5.4 9.9 14.4 11.5 7.3 4.5 -2.2 -3.1 3.6 2004 -3.6 -3.5 -0.3 3.0 7.1 10.6 12.5 12.3 8.0 2.6 0.4 -8.3 3.4 2005 -13.1 -6.4 0.3 4.2 6.0 9.9 13.8 12.6 8.6 3.8 -1.2 -3.8 2.9 MEAN -7.7 -5.2 -1.4 3.3 6.5 9.5 13.0 11.6 7.4 3.0 -0.9 -4.2 2.9 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 3 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M AVERAGE OF MAXIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 5.2 4.6 12.1 17.0 24.1 28.5 32.3 30.3 27.8 21.9 13.6 9.2 18.9 1989 1.0 2.6 10.1 16.4 22.0 29.7 31.2 30.6 27.0 22.1 13.0 7.0 17.7 1990 1.9 5.3 11.6 16.8 24.4 29.8 30.6 32.0 28.7 20.7 16.2 9.3 18.9 1991 5.5 6.8 11.4 18.1 22.6 28.7 33.1 31.7 27.4 19.2 14.2 6.2 18.8 1992 -1.3 2.5 6.6 14.4 19.5 26.7 30.8 28.7 23.9 20.0 13.1 6.2 15.9 1993 3.3 4.9 8.4 15.6 20.6 27.8 29.7 29.5 27.1 18.5 13.1 12.2 17.6 1994 6.1 7.3 11.6 17.9 21.8 28.6 33.2 32.7 23.9 18.0 12.6 6.8 18.4 1995 8.3 7.5 11.1 15.6 21.2 26.9 32.3 31.6 26.4 20.3 14.8 2.4 18.2 1996 -0.8 7.6 8.8 16.4 22.8 28.5 27.9 29.4 27.8 19.9 12.4 9.3 17.5 1997 4.1 6.2 7.9 14.7 21.2 27.4 33.2 32.1 26.6 20.1 10.1 4.1 17.3 1998 1.5 5.7 11.2 18.0 23.1 28.5 31.4 30.7 27.7 21.3 17.1 14.6 19.2 1999 4.5 8.3 9.2 17.6 25.1 30.3 31.3 30.2 28.3 21.5 13.5 10.9 19.2 2000 5.0 4.7 11.4 20.2 25.8 29.9 30.3 30.5 27.5 20.1 10.4 7.7 18.6 2001 5.7 8.2 13.8 20.1 24.0 29.2 31.6 30.5 26.7 21.6 13.4 9.0 19.5 2002 5.6 9.2 13.9 16.3 23.6 28.3 31.3 31.9 28.7 22.5 12.2 6.7 19.2 2003 6.0 8.1 11.6 18.0 21.8 28.9 33.6 31.4 27.8 21.7 13.9 8.8 19.3 2004 6.0 9.1 14.3 15.1 22.6 29.1 30.1 32.3 27.2 21.4 13.9 3.9 18.7 2005 1.1 5.5 12.6 19.5 22.5 29.6 32.8 31.8 28.8 21.9 12.8 10.3 19.1 MEAN 3.8 6.4 11.0 17.1 22.7 28.7 31.5 31.0 27.2 20.7 13.4 8.0 18.4 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 4 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 10.7 12.0 12.0 13.4 17.0 20.2 19.5 19.1 21.6 18.7 15.0 12.2 16.0 1989 12.2 12.2 11.5 14.9 16.4 20.3 19.0 19.2 19.5 19.9 12.7 10.7 15.7 1990 11.3 10.0 13.0 13.6 17.6 20.6 17.7 19.7 21.7 18.9 18.5 14.2 16.4 1991 10.5 11.5 12.1 15.5 17.4 19.7 21.1 21.2 20.8 15.7 16.2 8.8 15.9 1992 11.2 10.2 10.5 11.8 12.5 17.7 17.6 17.8 18.3 19.8 13.0 8.8 14.1 1993 9.7 9.9 9.8 13.0 14.5 19.3 18.5 18.5 20.3 16.9 12.6 15.3 14.9 1994 11.7 13.0 13.0 15.1 15.7 19.8 18.9 20.3 18.6 15.3 10.8 11.8 15.4 1995 13.4 11.5 13.4 13.0 15.1 18.4 19.3 20.6 19.2 18.0 16.3 14.0 16.0 1996 11.7 9.9 9.6 13.1 15.8 18.2 16.3 18.4 20.2 17.3 14.8 12.4 14.8 1997 12.0 12.1 10.8 13.3 15.6 18.0 18.8 20.2 19.3 15.8 11.7 12.1 15.0 1998 10.8 9.9 11.9 13.5 15.3 18.0 17.1 17.9 18.7 17.5 18.1 15.1 15.3 1999 10.2 12.0 11.8 13.8 18.1 19.2 18.0 18.0 20.6 17.9 13.2 15.8 15.7 2000 11.4 12.8 13.4 14.8 18.6 20.1 18.0 18.9 19.2 16.8 11.9 10.6 15.5 2001 13.4 13.2 15.7 16.4 16.4 19.1 18.3 19.3 19.0 16.5 14.8 10.0 16.0 2002 10.9 12.8 15.4 11.7 16.6 18.8 19.0 20.6 20.1 19.2 13.7 10.2 15.8 2003 12.0 10.4 12.6 13.4 16.4 19.0 19.2 19.9 20.5 17.2 16.1 11.9 15.7 2004 9.6 12.6 14.6 12.1 15.5 18.5 17.6 20.0 19.2 18.8 13.5 12.2 15.3 2005 14.2 11.9 12.3 15.3 16.5 19.7 19.0 19.2 20.2 18.1 14.0 14.1 16.2 MEAN 11.5 11.6 12.4 13.8 16.2 19.2 18.5 19.4 19.8 17.7 14.3 12.2 15.5 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 5 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M AVERAGE OF MEAN DAILY TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 -0.1 -1.4 6.1 10.3 15.6 18.4 22.5 20.8 17.0 12.5 6.1 3.1 10.9 1989 -5.1 -3.5 4.3 9.0 13.8 19.6 21.7 21.0 17.3 12.2 6.7 1.7 9.9 1990 -3.8 0.3 5.1 10.0 15.6 19.5 21.7 22.1 17.9 11.2 6.9 2.2 10.7 1991 0.3 1.1 5.3 10.4 13.9 18.9 22.6 21.1 17.0 11.3 6.1 1.8 10.8 1992 -6.9 -2.6 1.4 8.5 13.3 17.9 22.0 19.8 14.8 10.1 6.6 1.8 8.9 1993 -1.6 -0.0 3.5 9.1 13.3 18.1 20.5 20.3 17.0 10.1 6.8 4.6 10.1 1994 0.3 0.8 5.1 10.4 13.9 18.7 23.8 22.6 14.6 10.4 7.2 0.9 10.7 1995 1.6 1.7 4.4 9.1 13.6 17.7 22.7 21.3 16.8 11.3 6.7 -4.6 10.2 1996 -6.6 2.7 4.0 9.9 14.9 19.4 19.8 20.2 17.7 11.3 5.0 3.1 10.1 1997 -1.9 0.2 2.5 8.0 13.4 18.4 23.8 22.0 17.0 12.2 4.2 -2.0 9.8 1998 -3.9 0.8 5.2 11.3 15.4 19.5 22.8 21.7 18.3 12.6 8.1 7.1 11.6 1999 -0.6 2.3 3.3 10.7 16.1 20.7 22.3 21.2 18.0 12.5 6.9 3.0 11.4 2000 -0.7 -1.7 4.7 12.8 16.5 19.8 21.3 21.1 17.9 11.7 4.4 2.4 10.9 2001 -1.0 1.6 5.9 11.9 15.8 19.6 22.5 20.9 17.2 13.3 6.0 4.0 11.5 2002 0.2 2.8 6.2 10.5 15.3 18.9 21.8 21.6 18.7 12.9 5.4 1.6 11.3 2003 -0.0 2.9 5.3 11.3 13.6 19.4 24.0 21.4 17.5 13.1 5.8 2.9 11.4 2004 1.2 2.8 7.0 9.1 14.8 19.8 21.3 22.3 17.6 12.0 7.1 -2.2 11.1 2005 -6.0 -0.4 6.5 11.8 14.3 19.7 23.3 22.2 18.7 12.8 5.8 3.2 11.0 MEAN -1.9 0.6 4.8 10.2 14.6 19.1 22.2 21.3 17.3 11.9 6.2 1.9 10.7 SD 2.74 1.92 1.45 1.28 1.06 0.79 1.13 0.77 1.10 1.00 0.99 2.66 1.41 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 6 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M TEMPERATURE RECORDS LOWEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 -18.0 -22.6 -8.0 -7.0 1.0 3.6 8.4 7.6 3.0 -1.4 -9.6 -14.4 -22.6 DAY 20 6 17 3 8 26 2 12 1 12 24 29 1989 -20.0 -20.4 -9.6 -5.0 0.0 4.0 8.4 9.0 2.5 -2.0 -6.0 -11.5 -20.4 DAY 16 7 31 2 2 13 25 8 24 24 24 18 1990 -22.0 -13.0 -9.0 -4.0 2.0 3.6 9.0 9.4 3.0 -2.6 -7.4 -20.4 -22.0 DAY 31 1 21 6 27 2 19 25 20 31 30 28 1991 -12.2 -13.0 -7.0 -4.0 -1.0 4.0 8.0 7.2 0.4 -2.4 -7.4 -10.4 -13.0 DAY 26 14 16 8 5 1 3 29 28 31 27 23 1992 -26.2 -19.0 -11.2 -4.6 0.4 5.4 9.4 8.0 0.0 -3.2 -9.0 -9.0 -26.2 DAY 29 13 11 5 14 20 12 23 12 30 27 10 1993 -15.6 -20.6 -9.5 -3.2 -0.2 1.4 8.6 8.4 1.8 -3.6 -7.8 -10.0 -20.6 DAY 16 9 13 10 8 5 19 12 30 9 30 13 1994 -18.2 -12.0 -7.0 -2.4 0.0 4.4 9.0 8.4 -1.4 -3.0 -4.2 -14.0 -18.2 DAY 28 21 17 6 7 30 1 26 22 13 14 8 1995 -11.0 -9.8 -8.2 -4.6 1.0 4.8 8.2 8.2 1.8 -1.6 -14.0 -20.6 -20.6 DAY 23 26 28 1 10 1 2 11 23 18 28 14 1996 -26.8 -8.2 -6.4 -4.8 3.0 4.0 7.4 6.0 4.0 -3.4 -8.0 -8.4 -26.8 DAY 26 23 29 6 3 7 17 4 21 20 13 4 1997 -24.0 -16.0 -10.0 -5.8 -1.8 4.0 8.2 7.0 2.2 -2.0 -6.8 -22.6 -24.0 DAY 20 8 1 12 6 5 7 30 10 25 30 22 1998 -22.0 -11.2 -9.0 -2.0 0.8 7.6 11.0 10.0 5.0 0.0 -4.8 -7.6 -22.0 DAY 15 17 4 7 3 18 22 28 8 16 25 6 1999 -15.8 -18.0 -9.8 -5.0 2.6 6.8 10.0 9.8 2.2 -0.8 -12.0 -11.6 -18.0 DAY 27 7 15 11 2 16 29 28 26 21 30 6 2000 -21.6 -20.8 -9.6 -3.0 0.2 6.4 6.2 9.2 4.6 -2.0 -7.4 -10.6 -21.6 DAY 31 10 17 2 13 2 21 23 29 20 27 17 2001 -22.0 -10.6 -9.0 -4.2 2.2 5.2 8.0 7.0 4.6 1.6 -9.0 -7.4 -22.0 DAY 28 12 11 14 22 13 31 1 9 15 20 18 2002 -13.6 -12.2 -9.0 -2.8 -0.6 2.0 6.8 7.6 5.6 -2.2 -8.2 -14.8 -14.8 DAY 25 5 11 6 7 22 1 30 30 28 30 24 2003 -15.4 -15.0 -11.0 -1.8 -0.6 5.4 7.2 8.6 3.8 0.2 -10.0 -12.2 -15.4 DAY 27 1 2 18 1 7 2 11 29 25 24 13 2004 -12.4 -11.0 -9.2 -4.2 2.0 5.0 8.0 9.0 2.0 -1.8 -8.2 -23.0 -23.0 DAY 21 10 22 2 6 4 21 14 30 27 30 30 2005 -24.6 -15.6 -4.0 -4.2 0.0 6.0 10.0 8.0 4.0 -4.0 -6.0 -11.6 -24.6 DAY 13 11 3 7 7 3 1 31 28 25 26 31 1988-2005 -26.8 -22.6 -11.2 -7.0 -1.8 1.4 6.2 6.0 -1.4 -4.0 -14.0 -23.0 -26.8 YEAR-DAY 96-26 88- 6 92-11 88- 3 97- 6 93- 5 0-21 96- 4 94-22 5-25 95-28 4-30 96 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 7 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M TEMPERATURE RECORDS HIGHEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 12.6 10.6 18.0 21.6 29.0 31.4 35.6 33.4 32.2 24.2 19.6 15.6 35.6 DAY 5 29 30 20 27 13 23 20 11 7 3 5 1989 6.6 10.4 14.8 22.4 29.4 34.0 35.0 32.2 31.2 27.0 16.4 11.0 35.0 DAY 2 28 7 16 30 27 3 28 2 9 5 1 1990 8.0 10.0 17.0 24.0 28.8 34.0 33.4 34.2 31.6 25.0 21.0 16.0 34.2 DAY 1 19 10 13 21 30 11 12 4 2 4 1 1991 10.4 13.4 18.4 23.4 27.4 31.6 36.6 34.4 32.0 22.0 19.0 11.4 36.6 DAY 20 25 22 27 31 29 9 7 7 8 2 11 1992 6.2 8.0 13.4 19.6 26.2 32.4 33.4 32.4 26.4 24.2 18.0 12.0 33.4 DAY 20 22 29 21 30 30 1 1 16 2 20 12 1993 9.2 12.0 15.4 21.6 26.6 31.6 32.6 32.2 30.2 23.4 17.2 16.2 32.6 DAY 28 27 31 19 26 30 15 15 3 1 1 20 1994 14.0 13.0 16.8 22.6 27.8 30.8 36.6 35.6 29.6 22.0 18.0 11.8 36.6 DAY 1 27 30 29 31 25 21 5 2 1 4 29 1995 10.4 13.0 16.4 19.4 24.0 30.4 36.4 34.1 29.4 25.4 19.0 10.0 36.4 DAY 16 21 24 30 19 13 16 26 8 2 1 3 1996 7.0 14.0 16.4 21.2 28.4 30.4 30.0 31.4 30.8 26.8 20.4 14.0 31.4 DAY 4 10 30 23 31 25 3 10 10 1 5 5 1997 10.8 14.0 14.4 21.8 26.6 30.2 35.4 34.4 29.8 24.2 14.8 12.0 35.4 DAY 7 21 2 27 27 30 30 1 1 5 2 8 1998 6.0 10.8 19.8 24.0 27.6 31.2 36.0 34.2 31.0 27.0 20.0 20.0 36.0 DAY 4 7 28 15 28 29 11 18 2 4 18 10 1999 12.0 12.4 18.8 21.8 30.4 32.6 35.4 31.8 31.0 24.8 17.8 16.8 35.4 DAY 6 8 31 27 31 27 4 14 4 1 19 30 2000 12.6 11.8 16.4 23.8 30.0 33.4 34.0 33.8 31.0 23.4 18.4 12.4 34.0 DAY 1 25 24 14 30 23 11 4 9 1 1 1 2001 12.8 15.2 19.6 23.2 28.8 33.5 35.4 32.2 29.6 24.6 20.8 13.8 35.4 DAY 16 28 31 27 15 29 14 7 5 1 5 29 2002 10.8 13.4 19.2 24.0 28.4 31.6 34.2 33.4 31.0 25.4 17.8 11.6 34.2 DAY 6 24 13 28 19 29 20 10 1 3 11 7 2003 15.0 12.6 18.0 23.0 25.4 32.2 35.4 35.4 30.6 24.0 19.0 14.4 35.4 DAY 12 24 25 9 22 22 18 1 7 1 6 16 2004 9.6 16.0 20.4 21.8 26.6 31.6 34.4 34.6 31.8 25.8 20.0 10.0 34.6 DAY 5 29 9 22 27 30 30 5 10 4 11 7 2005 9.0 12.2 18.6 25.6 26.6 34.0 36.0 34.6 31.8 26.4 20.0 18.8 36.0 DAY 1 21 30 24 19 25 16 9 6 1 2 5 1988-2005 15.0 16.0 20.4 25.6 30.4 34.0 36.6 35.6 32.2 27.0 21.0 20.0 36.6 YEAR-DAY 3-12 4-29 4- 9 5-24 99-31 89-27 91- 9 94- 5 88-11 89- 9 90- 4 98-10 91 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 8 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M 0C COOLING DEGREE DAYS (BASE 21) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 0.0 0.0 0.0 0.0 0.0 0.2 57.3 13.4 0.0 0.0 0.0 0.0 70.9 1989 0.0 0.0 0.0 0.0 0.0 5.9 42.2 12.4 0.1 0.0 0.0 0.0 60.6 1990 0.0 0.0 0.0 0.0 0.0 6.5 34.2 38.1 0.0 0.0 0.0 0.0 78.8 1991 0.0 0.0 0.0 0.0 0.0 1.5 49.4 21.4 0.0 0.0 0.0 0.0 72.3 1992 0.0 0.0 0.0 0.0 0.0 1.8 41.2 10.9 0.0 0.0 0.0 0.0 53.9 1993 0.0 0.0 0.0 0.0 0.0 0.1 7.5 7.9 0.0 0.0 0.0 0.0 15.5 1994 0.0 0.0 0.0 0.0 0.0 1.3 88.0 56.9 0.0 0.0 0.0 0.0 146.2 1995 0.0 0.0 0.0 0.0 0.0 0.0 56.6 16.6 0.0 0.0 0.0 0.0 73.2 1996 0.0 0.0 0.0 0.0 0.0 4.3 4.4 8.2 0.0 0.0 0.0 0.0 16.9 1997 0.0 0.0 0.0 0.0 0.0 2.1 92.4 41.3 0.0 0.0 0.0 0.0 135.8 1998 0.0 0.0 0.0 0.0 0.0 1.1 64.1 31.2 0.4 0.0 0.0 0.0 96.8 1999 0.0 0.0 0.0 0.0 0.0 13.5 51.8 13.1 0.0 0.0 0.0 0.0 78.4 2000 0.0 0.0 0.0 0.0 0.0 6.1 40.7 15.4 0.9 0.0 0.0 0.0 63.1 2001 0.0 0.0 0.0 0.0 0.0 9.7 57.4 18.1 0.0 0.0 0.0 0.0 85.3 2002 0.0 0.0 0.0 0.0 0.0 3.1 31.9 25.4 0.2 0.0 0.0 0.0 60.6 2003 0.0 0.0 0.0 0.0 0.0 4.7 96.9 24.7 0.0 0.0 0.0 0.0 126.3 2004 0.0 0.0 0.0 0.0 0.0 10.8 25.3 42.8 1.5 0.0 0.0 0.0 80.4 2005 0.0 0.0 0.0 0.0 0.0 11.7 75.0 42.5 0.3 0.0 0.0 0.0 129.5 MEAN 0.0 0.0 0.0 0.0 0.0 4.7 50.9 24.5 0.2 0.0 0.0 0.0 80.3 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 9 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M 0C HEATING DEGREE DAYS (BASE 18) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 562.5 562.3 370.1 231.6 77.3 8.2 0.0 0.0 41.3 169.3 356.2 463.0 2841.8 1989 716.3 576.4 423.4 270.7 132.0 6.8 0.2 0.0 45.4 181.2 340.4 505.4 3198.1 1990 674.9 478.8 399.7 239.9 76.3 8.3 0.0 0.0 27.9 209.4 332.3 490.3 2937.9 1991 550.1 474.5 380.3 228.9 130.2 7.4 0.0 0.0 44.8 206.3 357.3 503.1 2882.8 1992 771.5 597.1 516.0 285.4 146.2 23.4 0.0 5.3 96.7 244.3 341.6 502.9 3530.4 1993 606.9 504.7 449.2 266.9 145.8 20.8 0.1 0.1 40.1 245.7 335.9 416.1 3032.3 1994 549.7 482.1 400.2 229.4 126.8 6.7 0.0 0.0 110.2 236.4 323.7 530.5 2995.7 1995 509.5 455.9 422.8 266.9 135.4 29.5 0.0 0.0 41.6 208.6 339.4 699.4 3109.0 1996 763.9 444.8 434.0 244.3 96.7 4.3 1.4 2.3 25.0 209.0 389.7 461.5 3076.9 1997 617.2 499.2 481.3 299.0 143.1 13.6 0.0 0.0 37.8 180.9 412.5 619.0 3303.7 1998 678.9 482.1 396.0 201.7 81.8 4.0 0.0 0.0 13.8 169.0 298.1 339.4 2664.8 1999 576.8 438.9 456.0 218.7 68.5 0.0 0.0 0.0 29.1 169.2 333.0 465.0 2755.2 2000 578.6 572.1 412.7 156.3 54.5 4.4 0.2 0.0 24.8 195.7 407.0 484.1 2890.4 2001 589.6 458.5 374.3 183.5 69.2 9.1 0.0 0.4 37.3 145.1 359.7 433.3 2660.0 2002 553.1 426.5 364.8 227.1 88.9 8.0 0.0 0.0 10.9 158.3 379.3 507.9 2724.8 2003 558.0 422.6 394.4 200.5 135.2 6.3 0.0 0.0 27.1 152.7 364.7 469.1 2730.6 2004 520.6 440.1 341.0 267.9 99.9 5.3 0.0 0.0 46.5 185.4 326.8 626.0 2859.5 2005 743.5 515.9 357.7 184.5 116.3 12.8 0.0 0.1 11.3 160.3 365.6 457.3 2925.3 MEAN 617.9 490.7 409.7 233.5 106.9 9.9 0.1 0.5 39.5 190.4 353.5 498.5 2951.1 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 10 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 -5.9 -6.3 -3.3 -0.0 2.6 -5.4 2.8 0.2 -4.5 -4.4 -5.1 -7.1 -3.0 1989 -12.4 -11.1 -5.7 -3.2 -0.5 -0.7 3.9 1.9 1.9 -1.1 -2.5 -4.8 -2.9 1990 -8.4 -6.1 -4.5 -3.2 -1.4 -1.9 1.5 2.9 -3.7 -5.0 -7.3 -9.2 -3.8 1991 -6.6 -8.3 -4.1 -4.5 -6.6 -3.3 -1.4 -2.8 -4.1 -1.3 -6.7 -5.3 -4.6 1992 -12.6 -9.9 -8.1 -5.5 -0.7 -1.7 0.7 1.1 -4.9 -5.8 -5.1 -6.3 -4.9 1993 -7.9 -6.7 -5.7 -3.4 0.4 -2.4 0.4 0.3 -4.3 -5.1 -4.3 -7.0 -3.8 1994 -8.0 -11.1 -7.2 -2.7 -1.9 -3.5 2.9 -0.5 -4.2 -1.3 -3.2 -11.0 -4.3 1995 -8.7 -7.4 -6.1 -2.4 0.2 1.0 1.3 1.2 0.0 -2.2 -8.8 -9.3 -3.4 1996 -10.5 -5.0 -4.5 -2.9 1.6 1.3 2.3 0.4 -2.4 -5.8 -6.1 -6.2 -3.2 1997 -9.1 -11.8 -8.0 -3.3 0.5 3.1 6.3 3.9 0.6 0.1 -3.4 -10.0 -2.6 1998 -11.5 -8.6 -6.5 -2.7 0.9 2.8 7.5 5.9 2.5 -1.9 -5.3 -6.7 -2.0 1999 -6.9 -7.7 -6.8 -2.9 -0.1 1.5 4.2 2.5 -0.4 -2.2 -5.3 -8.1 -2.7 2000 -9.6 -9.6 -8.7 -1.7 -2.9 -2.0 0.1 -1.2 -3.2 -2.5 -3.6 -5.8 -4.2 2001 -8.8 -9.1 -7.0 -6.0 -1.2 -0.9 0.8 0.0 -1.1 -0.3 -6.1 -2.2 -3.5 2002 -8.3 -8.2 -6.9 -0.4 -0.8 1.0 2.7 0.0 -1.1 -2.6 -2.7 -5.5 -2.7 2003 -9.5 -8.1 -7.3 -2.6 -2.5 -0.8 2.4 -1.6 -3.9 -4.7 -7.8 -7.5 -4.5 2004 -6.2 -8.3 -5.6 -2.6 -1.0 0.4 2.3 -0.8 -3.1 -5.4 -3.8 -8.6 -3.6 2005 -11.7 -8.8 -6.7 -2.9 -2.4 -2.9 1.2 0.9 -3.4 -5.5 -4.6 -6.3 -4.4 MEAN -9.0 -8.4 -6.2 -2.9 -0.9 -0.8 2.3 0.8 -2.2 -3.2 -5.1 -7.0 -3.6 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 11 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 3.38 3.31 4.18 5.24 6.15 3.46 6.29 5.21 3.71 3.75 3.52 3.05 4.27 1989 2.03 2.32 3.43 4.21 4.90 4.81 7.03 5.78 5.99 4.69 4.44 3.55 4.43 1990 2.74 3.26 3.80 4.11 4.66 4.40 5.66 6.24 3.92 3.48 2.94 2.57 3.98 1991 3.16 2.89 3.91 3.77 3.24 4.12 4.61 4.13 3.76 4.71 3.09 3.56 3.75 1992 2.05 2.51 2.88 3.51 4.91 4.51 5.31 5.51 3.50 3.37 3.62 3.29 3.75 1993 2.87 3.24 3.47 4.05 5.20 4.28 5.17 5.13 3.67 3.49 3.76 3.05 3.95 1994 2.82 2.22 3.09 4.20 4.46 3.89 6.29 4.89 3.83 4.63 4.13 2.31 3.90 1995 2.70 2.98 3.32 4.31 5.25 5.48 5.54 5.65 5.06 4.33 2.69 2.60 4.16 1996 2.41 3.52 3.75 4.17 5.63 5.61 5.88 5.21 4.22 3.36 3.28 3.19 4.19 1997 2.61 2.12 2.91 4.11 5.19 6.33 7.92 6.69 5.29 5.12 3.93 2.43 4.55 1998 2.22 2.77 3.34 4.24 5.34 6.13 8.52 7.66 6.09 4.39 3.43 3.15 4.77 1999 3.07 2.94 3.16 4.13 5.02 5.62 6.82 5.97 4.94 4.35 3.57 2.82 4.37 2000 2.62 2.53 2.80 4.53 4.15 4.35 5.13 4.63 3.97 4.33 3.92 3.39 3.86 2001 2.65 2.64 3.05 3.28 4.63 4.77 5.29 5.11 4.66 4.95 3.29 4.38 4.06 2002 2.86 2.82 3.13 5.02 4.85 5.46 6.19 5.19 4.69 4.28 4.22 3.52 4.35 2003 2.55 2.93 3.16 4.33 4.25 4.78 6.05 4.58 3.79 3.57 3.02 3.06 3.84 2004 3.29 2.82 3.42 4.47 4.77 5.27 6.03 4.80 4.05 3.40 3.95 2.81 4.09 2005 2.24 2.71 3.44 4.32 4.36 4.13 5.58 5.53 3.98 3.36 3.70 3.23 3.88 MEAN 2.68 2.81 3.35 4.22 4.83 4.86 6.07 5.44 4.39 4.09 3.58 3.11 4.12 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 12 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 4.19 4.10 5.16 6.49 7.63 4.29 7.74 6.44 4.61 4.68 4.39 3.80 5.29 1989 2.52 2.88 4.24 5.23 6.10 5.97 8.67 7.16 7.42 5.85 5.53 4.41 5.50 1990 3.40 4.03 4.73 5.10 5.78 5.46 7.00 7.72 4.87 4.35 3.67 3.20 4.94 1991 3.93 3.59 4.84 4.69 4.03 5.11 5.71 5.12 4.69 5.88 3.85 4.42 4.65 1992 2.54 3.10 3.56 4.36 6.10 5.59 6.57 6.83 4.37 4.20 4.52 4.08 4.65 1993 3.57 4.01 4.30 5.02 6.46 5.31 6.41 6.36 4.57 4.36 4.69 3.81 4.91 1994 3.51 2.75 3.83 5.22 5.55 4.82 7.74 6.04 4.78 5.78 5.15 2.88 4.84 1995 3.37 3.69 4.12 5.35 6.52 6.79 6.83 6.99 6.28 5.40 3.35 3.23 5.16 1996 2.99 4.36 4.64 5.18 6.99 6.94 7.29 6.46 5.25 4.19 4.10 3.99 5.20 1997 3.25 2.64 3.60 5.10 6.45 7.83 9.74 8.28 6.58 6.39 4.89 3.02 5.65 1998 2.75 3.44 4.15 5.26 6.63 7.60 10.50 9.48 7.57 5.48 4.28 3.94 5.92 1999 3.82 3.65 3.91 5.13 6.23 6.97 8.41 7.41 6.13 5.43 4.44 3.53 5.42 2000 3.25 3.15 3.48 5.63 5.16 5.40 6.35 5.76 4.95 5.40 4.88 4.21 4.80 2001 3.30 3.28 3.80 4.09 5.75 5.91 6.54 6.33 5.79 6.15 4.08 5.42 5.04 2002 3.53 3.48 3.85 6.15 5.97 6.71 7.59 6.37 5.79 5.29 5.21 4.32 5.35 2003 3.14 3.59 3.88 5.33 5.25 5.87 7.40 5.64 4.68 4.42 3.73 3.77 4.73 2004 4.03 3.47 4.21 5.48 5.85 6.46 7.38 5.89 4.99 4.21 4.86 3.46 5.02 2005 2.75 3.32 4.22 5.31 5.36 5.06 6.82 6.77 4.90 4.15 4.56 3.99 4.77 MEAN 3.32 3.47 4.14 5.23 5.99 6.00 7.48 6.72 5.46 5.09 4.46 3.86 5.10 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 13 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 2.35 2.33 5.58 8.24 14.96 24.53 28.04 25.73 21.95 13.86 6.89 4.86 13.28 1989 2.13 2.58 5.24 8.69 14.64 25.70 25.78 25.47 18.74 12.74 5.66 3.08 12.54 1990 1.86 2.93 5.61 9.86 17.75 25.93 26.11 27.18 23.58 13.33 9.05 5.57 14.06 1991 2.95 3.79 5.27 11.11 16.91 24.33 31.17 29.02 22.00 10.03 7.66 3.04 13.94 1992 1.87 2.57 4.13 8.51 11.86 21.35 27.59 23.20 18.04 12.33 7.00 3.43 11.82 1993 2.48 2.96 4.48 8.75 12.74 23.40 25.57 24.83 21.71 11.27 6.83 6.22 12.60 1994 3.62 4.94 6.40 10.40 14.54 25.21 30.69 31.13 17.13 9.50 6.16 4.53 13.69 1995 4.55 4.09 5.92 8.27 12.75 20.48 30.35 27.52 19.22 11.82 8.96 1.88 12.99 1996 1.47 3.78 4.30 9.25 14.36 23.23 21.89 24.23 21.50 12.60 6.60 4.66 12.32 1997 3.10 4.71 4.60 7.71 13.28 20.24 29.16 27.41 19.20 11.48 4.62 3.20 12.39 1998 2.47 3.76 6.36 10.82 15.52 22.57 24.92 24.25 19.80 12.87 9.06 7.75 13.35 1999 2.68 4.67 5.31 10.33 17.95 26.33 26.85 25.70 22.09 13.50 7.38 5.40 14.01 2000 3.34 3.30 6.68 12.84 20.06 26.52 27.34 26.98 22.52 11.78 4.78 3.76 14.16 2001 3.39 4.69 7.84 13.57 17.48 25.50 29.45 26.51 20.33 12.91 7.20 3.36 14.35 2002 3.28 5.20 7.79 8.58 16.71 22.66 26.74 28.76 23.39 13.93 5.24 3.11 13.78 2003 3.22 4.12 5.59 9.06 12.47 20.48 27.03 23.86 18.50 12.01 6.13 3.89 12.20 2004 2.70 4.35 6.83 6.63 12.70 20.06 21.35 25.05 17.68 11.44 5.80 2.06 11.39 2005 1.58 2.88 5.92 9.81 12.59 21.68 26.04 23.43 19.33 11.87 5.12 4.11 12.03 MEAN 2.73 3.76 5.77 9.58 14.96 23.34 27.00 26.13 20.37 12.18 6.67 4.11 13.05 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 14 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 68 70 53 49 38 18 25 23 21 29 44 47 40 1989 56 54 50 43 36 22 27 25 31 36 53 62 41 1990 67 61 50 38 28 20 24 24 20 29 35 46 37 1991 59 51 52 35 22 20 19 18 22 43 38 61 37 1992 61 56 49 38 38 24 22 26 22 29 43 57 39 1993 63 61 53 41 39 22 23 23 20 32 45 42 39 1994 54 40 42 38 32 18 23 18 24 42 49 42 35 1995 47 52 46 43 38 30 21 22 27 37 30 68 38 1996 72 57 56 40 38 26 27 24 22 28 44 51 40 1997 58 39 48 45 37 31 27 25 28 39 56 55 41 1998 55 51 43 36 33 28 32 31 31 35 36 38 37 1999 62 49 48 36 28 23 27 24 24 32 41 47 37 2000 54 55 38 33 23 20 21 20 21 36 58 57 36 2001 58 48 41 26 29 22 21 22 26 36 43 66 37 2002 55 45 37 47 29 26 25 21 23 31 56 60 38 2003 58 50 45 42 33 26 24 21 23 30 41 54 37 2004 64 50 46 50 36 28 29 22 25 31 50 68 42 2005 71 58 44 40 35 23 23 25 22 29 52 56 40 MEAN 60 53 47 40 33 24 24 23 24 34 45 54 38 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 15 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 84 86 75 70 59 39 47 42 38 47 66 66 60 1989 68 68 70 72 68 41 42 40 44 50 70 80 59 1990 78 78 70 56 51 40 42 37 35 49 59 66 55 1991 77 74 77 62 43 39 36 35 37 70 61 76 57 1992 73 71 71 60 63 46 38 46 41 48 63 76 58 1993 77 79 75 64 67 48 42 41 37 50 66 61 59 1994 69 58 64 65 54 33 41 33 39 65 65 61 54 1995 70 77 73 67 60 56 37 35 40 58 46 83 59 1996 81 77 78 64 65 45 45 40 36 46 61 74 59 1997 76 55 68 70 59 51 39 34 39 55 80 73 58 1998 67 70 65 56 52 44 48 45 46 54 51 54 54 1999 81 73 69 58 44 35 42 38 34 49 65 68 55 2000 74 74 59 51 38 35 34 34 35 60 83 80 55 2001 81 73 70 44 49 39 34 37 41 56 64 84 56 2002 77 67 58 68 47 43 42 35 37 48 81 80 57 2003 76 72 70 64 54 43 36 33 35 43 62 77 55 2004 86 73 70 75 60 46 47 34 40 48 72 87 62 2005 87 81 68 63 58 39 36 39 34 44 79 80 59 MEAN 77 73 69 63 55 42 40 38 38 52 66 74 57 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION BOROOJEN (99459) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 16 LATITUDE 31 57 N LONGITUDE 51 18 E DATA PROCESSING CENTER ELEVATION 2197.0 M AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 51 55 37 34 26 9 15 14 12 18 28 33 28 1989 45 42 35 27 22 14 20 18 23 26 37 45 30 1990 56 48 37 28 17 12 16 17 12 18 20 31 26 1991 45 35 35 20 12 12 10 10 14 26 22 46 24 1992 48 43 33 25 25 14 14 17 14 18 29 41 27 1993 50 46 37 27 25 12 14 15 12 21 29 27 26 1994 40 25 28 24 20 12 15 12 16 28 36 27 24 1995 28 34 30 29 25 17 14 17 21 25 20 53 26 1996 62 42 40 27 24 17 20 17 15 18 32 34 29 1997 44 28 31 30 26 21 21 20 21 29 39 39 29 1998 43 37 29 25 23 20 25 24 22 23