STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.5 3.2 8.6 17.6 20.6 27.4 30.7 30.2 25.8 18.8 12.3 4.8 17.0 MINIMUN AIR TEMPERATURE (C) 0.1 -0.5 4.9 12.0 14.6 20.9 24.6 24.1 19.9 13.8 7.9 1.5 12.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 16 30 29 14 0 0 0 89 DAYS WITH MINIMUM TEMP. <=-4 1 6 0 0 0 0 0 0 0 0 0 0 7 DAYS WITH FREEZING MIN.<= 0 18 15 2 0 0 0 0 0 0 0 0 16 51 TEMPERATURE RECORDS LOWEST(C) -4.0 -8.0 -3.6 5.0 8.0 16.6 20.0 20.2 11.8 11.2 3.0 -3.5 -8.0 DAY 28 13 11 13 6 19 15 28 28 16 28 22 MAXIMUM AIR TEMPERATURE (C) 6.1 6.2 11.6 21.0 24.7 31.0 34.2 33.8 29.3 22.0 15.4 7.4 20.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 23 31 30 18 0 0 0 102 DAYS WITH MAXIMUM TEMP. <= 0 0 3 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 9.6 12.5 19.5 27.5 29.5 35.6 37.0 38.5 35.0 24.6 22.5 13.0 38.5 DAY 31 28 30 22 29 29 7 6 8 27 3 10 DIF. BETWEEN (MAX.-MIN.) (C) 6.0 6.7 6.7 9.0 10.1 10.1 9.6 9.7 9.4 8.2 7.5 5.9 8.2 MEAN DAILY TEMP. (MDT) (C) 3.1 2.8 8.3 16.5 19.6 26.0 29.4 29.0 24.6 17.9 11.7 4.5 16.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 4.4 17.7 149.3 260.3 247.0 125.7 0.0 0.0 0.0 804.5 HEATING DEG. DAYS(BASE 18 0C) 462.0 424.3 301.7 74.1 21.2 0.0 0.0 0.0 2.6 22.8 190.1 419.6 1918.3 DEWPOINT (MEAN C) -3.3 -5.3 0.5 -2.1 -0.3 0.8 3.6 2.9 3.5 0.5 -2.2 -4.9 -0.5 MIXING RATIO (G/KG) 3.58 3.15 4.86 4.16 4.75 5.09 6.00 5.81 6.07 4.77 3.84 3.30 4.61 VAPOUR PRESSURE (HPA) 4.93 4.33 6.64 5.70 6.48 6.94 8.16 7.92 8.30 6.56 5.30 4.52 6.31 SATURATION DEF. (HPA) 3.01 3.73 4.99 15.19 18.60 30.15 36.68 35.78 26.21 15.48 9.41 4.34 16.96 RELATIVE HUMIDITY (MEAN %) 64 57 60 30 29 20 19 19 26 32 39 53 37 RELATIVE HUMIDITY (MAX. %) 75 72 74 42 45 30 27 27 34 45 50 69 49 RELATIVE HUMIDITY (MIN. %) 53 46 48 22 19 14 15 15 20 24 30 41 29 RELATIVE HUMIDITY (MEAN% 03UTC) 71 65 66 41 41 29 27 26 33 44 49 63 46 RELATIVE HUMIDITY (MEAN% 09UTC) 60 55 59 27 25 18 17 18 24 28 34 48 34 RELATIVE HUMIDITY (MEAN% 15UTC) 66 57 56 27 24 16 16 17 24 31 40 56 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 22.1 33.7 124.6 22.7 8.7 4.1 0.0 0.0 0.0 2.3 0.0 74.9 293.1 DAYS WITH PRECIPITATION >=10 0 1 5 1 0 0 0 0 0 0 0 4 11 DAYS WITH PRECIPITATION >= 5 1 2 6 2 0 0 0 0 0 0 0 5 16 DAYS WITH PRECIPITATION >= 1 6 7 12 3 5 1 0 0 0 0 0 10 44 DAYS WITH PRECIPITATION 11 16 15 13 7 5 0 0 2 5 2 15 91 GREATEST DAILY PRECIPITATION 9.0 11.0 31.0 13.0 2.0 4.0 0.0 0.0 0.0 1.0 0.0 20.0 31.0 DAY 22 21 6 4 3 19 ** ** ** 15 ** 9 DAY WITH THUNDER STORM 0 0 2 5 2 2 0 0 0 2 1 0 14 DAYS WITH SNOW OR SLEET 5 6 2 0 0 0 0 0 0 0 0 5 18 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 180 180 180 270 180 180 180 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 3.6 4.3 4.9 6.2 14.0 5.9 6.3 5.6 5.6 5.7 5.0 3.9 5.5 PREVAILING WIND PERCENT 21.3 27.1 21.9 25.3 25.8 36.0 52.3 62.6 52.0 40.6 33.3 20.0 34.6 CALMS PERCENT OF WIND 33.5 15.7 12.9 2.7 9.7 10.7 6.5 2.6 0.7 1.9 13.3 11.0 10.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 224 215 224 239 252 213 186 182 204 201 215 300 217 VECTOR WIND MAGNITUDE(KNOTS) 1.3 1.7 1.3 3.8 5.1 2.5 4.0 3.4 3.4 2.8 2.2 1.0 2.4 WIND STEADINESES (MEAN %) 46.4 42.5 29.5 50.7 63.7 43.9 71.4 68.0 59.6 51.9 47.8 23.3 45.3 WIND SPEED (MEAN KNOTS) 2.8 4.0 4.4 7.5 8.0 5.7 5.6 5.0 5.7 5.4 4.6 4.3 5.3 FASTEST WIND DIRECTION 270 280 270 320 300 270 250 180 290 350 270 270 320 FASTEST WIND SPEED (KNOTS) 33 35 29 49 47 31 25 25 31 27 29 29 49 DAY 27 4 7 26 16 8 8 10 24 28 19 4 DAYS WITH SKY CLEAR (0-2)/8 8 9 3 10 17 24 30 31 29 17 20 15 213 DAYS WITH P.CLOUDY (3-6)/8 16 7 14 18 13 6 1 0 1 11 10 7 104 DAYS WITH CLOUDY (7-8)/8 7 12 14 2 1 0 0 0 0 3 0 9 48 DAYS WITH VISIBILITY =< 2 KM 13 5 2 0 0 0 0 0 0 0 0 5 25 DURATION OF SUNSHINE HOURS 126.9 111.8 115.5 220.7 269.7 329.8 348.1 346.6 302.6 216.3 181.4 109.5 2678.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 860.0 860.1 858.0 858.6 855.6 855.8 854.2 855.7 860.0 862.9 863.2 859.2 858.6 MAX. QFE PRESSURE IN HPA 868.8 871.0 865.1 863.8 862.6 863.2 858.6 860.7 866.4 867.3 868.4 867.9 871.0 DAY-HOUR 12- 6 15- 6 29- 6 19- 6 25- 6 23- 6 1- 6 23- 6 27- 6 13- 6 24- 6 17- 6 MIN. QFE PRESSURE IN HPA 850.2 852.6 847.5 848.6 847.9 847.1 848.4 849.9 852.8 858.2 856.5 851.2 847.1 DAY-HOUR 25-12 4-12 7- 3 4-15 22-15 11-15 13-15 12-15 8-15 4-12 5-12 25-12 MEAN QNH PRESSURE IN HPA 1019.9 1019.9 1017.5 1018.2 1014.8 1015.0 1013.1 1014.9 1019.8 1023.2 1023.5 1018.9 1018.2 MAX. QNH PRESSURE IN HPA 1029.9 1032.4 1025.7 1024.2 1022.8 1023.5 1018.2 1020.6 1027.2 1028.2 1029.5 1028.9 1032.4 DAY-HOUR 12- 6 15- 6 29- 6 19- 6 25- 6 23- 6 1- 6 23- 6 27- 6 13- 6 24- 6 17- 6 MIN. QNH PRESSURE IN HPA 1008.6 1011.3 1005.5 1006.7 1005.9 1005.0 1006.5 1008.2 1011.5 1017.8 1015.8 1009.7 1005.0 DAY-HOUR 25-12 4-12 7- 3 4-15 22-15 11-15 13-15 12-15 8-15 4-12 5-12 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 860.1 860.1 858.1 859.0 856.2 856.4 854.9 856.4 860.5 863.4 863.6 859.5 859.0 MAX. QFE PRESSURE IN HPA 867.4 869.9 863.1 863.1 861.6 862.0 858.1 860.3 865.7 867.1 867.5 866.7 869.9 DAY 12 15 29 19 25 23 1 23 27 13 24 17 MIN. QFE PRESSURE IN HPA 851.2 853.4 847.5 851.5 849.1 847.9 849.2 851.6 854.5 860.0 858.3 854.4 847.5 DAY 26 21 7 10 23 12 8 12 8 15 6 26 MEAN QNH PRESSURE IN HPA 1020.0 1020.0 1017.6 1018.7 1015.4 1015.7 1013.9 1015.7 1020.4 1023.7 1023.9 1019.2 1018.7 MAX. QNH PRESSURE IN HPA 1028.3 1031.2 1023.4 1023.4 1021.7 1022.1 1017.6 1020.2 1026.4 1028.0 1028.4 1027.5 1031.2 DAY 12 15 29 19 25 23 1 23 27 13 24 17 MIN. QNH PRESSURE IN HPA 1009.7 1012.2 1005.5 1010.1 1007.3 1005.9 1007.4 1010.2 1013.5 1019.8 1017.9 1013.4 1005.5 DAY 26 21 7 10 23 12 8 12 8 15 6 26 MEAN QFF PRESSURE IN HPA 1022.0 1022.5 1016.1 1012.5 1007.3 1003.9 1000.3 1002.5 1009.8 1017.2 1021.2 1020.6 1013.0 MAX. QFF PRESSURE IN HPA 1031.2 1037.4 1026.3 1020.4 1018.1 1010.9 1004.9 1008.1 1020.6 1021.5 1027.9 1030.9 1037.4 DAY 12 15 12 14 25 23 12 23 27 13 24 17 MIN. QFF PRESSURE IN HPA 1011.5 1011.1 1005.5 1003.4 1000.0 992.8 992.8 996.8 1000.6 1013.5 1012.1 1012.7 992.8 DAY 26 21 7 10 23 12 8 12 8 5 5 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 861.1 861.1 859.0 859.7 856.7 857.0 855.5 857.0 861.2 864.0 864.4 860.3 859.8 MAX. QFE PRESSURE IN HPA 868.8 871.0 865.1 863.8 862.6 863.2 858.6 860.7 866.4 867.3 868.4 867.9 871.0 DAY 12 15 29 19 25 23 1 23 27 13 24 17 MIN. QFE PRESSURE IN HPA 852.4 854.4 848.7 852.3 849.4 848.7 850.1 851.7 854.5 860.5 858.6 855.9 848.7 DAY 26 21 7 10 23 12 8 12 8 5 6 25 MEAN QNH PRESSURE IN HPA 1021.1 1021.0 1018.7 1019.5 1016.0 1016.4 1014.6 1016.4 1021.2 1024.5 1024.9 1020.2 1019.5 MAX. QNH PRESSURE IN HPA 1029.9 1032.4 1025.7 1024.2 1022.8 1023.5 1018.2 1020.6 1027.2 1028.2 1029.5 1028.9 1032.4 DAY 12 15 29 19 25 23 1 23 27 13 24 17 MIN. QNH PRESSURE IN HPA 1011.1 1013.4 1006.8 1011.0 1007.6 1006.8 1008.4 1010.3 1013.5 1020.4 1018.2 1015.1 1006.8 DAY 26 21 7 10 23 12 8 12 8 5 6 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 859.9 860.3 858.3 859.0 856.0 856.2 854.7 856.1 860.3 863.0 863.2 859.1 858.8 MAX. QFE PRESSURE IN HPA 867.3 870.8 864.7 863.0 862.1 862.5 858.0 859.8 865.6 866.6 867.0 866.4 870.8 DAY 12 15 12 15 25 23 1 23 27 13 24 17 MIN. QFE PRESSURE IN HPA 851.1 853.4 848.7 851.9 848.5 848.7 849.7 851.3 854.1 859.9 856.9 853.8 848.5 DAY 25 4 7 10 23 12 8 12 8 4 5 25 MEAN QNH PRESSURE IN HPA 1019.7 1020.1 1017.9 1018.6 1015.2 1015.5 1013.7 1015.3 1020.2 1023.3 1023.5 1018.8 1018.5 MAX. QNH PRESSURE IN HPA 1028.2 1032.2 1025.2 1023.3 1022.2 1022.7 1017.5 1019.6 1026.2 1027.4 1027.9 1027.2 1032.2 DAY 12 15 12 15 25 23 1 23 27 13 24 17 MIN. QNH PRESSURE IN HPA 1009.6 1012.2 1006.8 1010.5 1006.6 1006.8 1008.0 1009.8 1013.0 1019.7 1016.3 1012.7 1006.6 DAY 25 4 7 10 23 12 8 12 8 4 5 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 859.2 859.3 857.2 857.7 854.8 855.0 853.2 854.7 858.9 861.9 862.1 858.4 857.7 MAX. QFE PRESSURE IN HPA 867.2 869.8 863.5 862.0 860.3 860.8 856.4 858.2 863.5 865.7 866.4 865.4 869.8 DAY 12 15 12 19 25 23 1 23 30 13 24 17 MIN. QFE PRESSURE IN HPA 850.2 852.6 848.3 850.2 848.2 848.2 848.5 850.1 852.9 858.2 856.5 851.2 848.2 DAY 25 4 6 4 22 11 8 12 8 4 5 25 MEAN QNH PRESSURE IN HPA 1019.0 1019.1 1016.6 1017.2 1013.8 1014.0 1012.0 1013.8 1018.5 1022.1 1022.3 1017.9 1017.2 MAX. QNH PRESSURE IN HPA 1028.1 1031.1 1023.8 1022.1 1020.2 1020.7 1015.7 1017.8 1023.8 1026.4 1027.2 1026.0 1031.1 DAY 12 15 12 19 25 23 1 23 30 13 24 17 MIN. QNH PRESSURE IN HPA 1008.6 1011.3 1006.4 1008.6 1006.3 1006.3 1006.6 1008.4 1011.7 1017.8 1015.8 1009.7 1006.3 DAY 25 4 6 4 22 11 8 12 8 4 5 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 859.8 859.7 857.3 857.5 854.6 854.5 852.8 854.4 858.9 862.3 862.6 858.7 857.8 MAX. QFE PRESSURE IN HPA 867.5 869.8 863.6 862.0 859.7 860.0 856.0 858.0 863.8 866.1 867.1 866.0 869.8 DAY 12 15 12 14 25 23 11 31 30 13 24 17 MIN. QFE PRESSURE IN HPA 850.2 853.1 848.5 848.6 847.9 847.1 848.4 849.9 852.8 858.7 857.1 851.5 847.1 DAY 25 4 6 4 22 11 13 12 8 4 5 25 MEAN QNH PRESSURE IN HPA 1019.6 1019.5 1016.7 1017.0 1013.6 1013.5 1011.6 1013.4 1018.6 1022.4 1022.9 1018.4 1017.3 MAX. QNH PRESSURE IN HPA 1028.4 1031.1 1024.0 1022.1 1019.5 1019.8 1015.2 1017.5 1024.2 1026.8 1028.0 1026.7 1031.1 DAY 12 15 12 14 25 23 11 31 30 13 24 17 MIN. QNH PRESSURE IN HPA 1008.6 1011.9 1006.6 1006.7 1005.9 1005.0 1006.5 1008.2 1011.5 1018.3 1016.5 1010.1 1005.0 DAY 25 4 6 4 22 11 13 12 8 4 5 25 MEAN QFF PRESSURE IN HPA 1021.7 1021.9 1015.2 1010.7 1005.5 1001.8 997.9 1000.3 1008.0 1016.0 1020.2 1019.8 1011.6 MAX. QFF PRESSURE IN HPA 1031.1 1036.3 1026.0 1019.0 1013.8 1008.3 1002.1 1005.7 1017.8 1021.1 1027.4 1030.7 1036.3 DAY 12 15 12 14 25 23 11 27 27 13 24 17 MIN. QFF PRESSURE IN HPA 1010.4 1011.8 1006.1 1002.9 997.7 991.8 992.7 994.4 998.0 1011.4 1010.9 1010.3 991.8 DAY 25 28 6 4 22 11 7 6 8 4 5 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 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.7 3.5 5.4 14.7 17.3 26.4 31.7 27.7 24.1 18.8 12.7 ***** ***** MINIMUN AIR TEMPERATURE (C) -2.5 -0.1 1.3 9.4 12.3 19.8 25.8 21.9 17.8 12.9 8.3 ***** ***** DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 10 31 22 0 0 0 **** **** DAYS WITH MINIMUM TEMP. <=-4 12 3 4 0 0 0 0 0 0 0 0 **** **** DAYS WITH FREEZING MIN.<= 0 24 17 12 0 0 0 0 0 0 0 2 **** **** TEMPERATURE RECORDS LOWEST(C) -8.0 -5.2 -6.0 3.5 4.5 15.0 21.5 15.0 11.0 9.5 -1.2 ***** ***** DAY 28 12 11 3 5 9 12 31 2 18 28 ** MAXIMUM AIR TEMPERATURE (C) 3.3 6.6 8.4 18.2 20.7 29.8 35.1 31.3 27.7 22.5 16.2 ***** ***** DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 13 31 24 2 0 0 **** **** DAYS WITH MAXIMUM TEMP. <= 0 5 0 1 0 0 0 0 0 0 0 0 **** **** TEMPERATURE RECORDS HIGHEST(C) 8.2 12.4 17.5 25.0 29.4 35.8 38.4 35.5 30.6 26.2 20.6 ***** ***** DAY 2 22 29 21 30 30 5 25 25 13 2 ** DIF. BETWEEN (MAX.-MIN.) (C) 5.8 6.7 7.1 8.8 8.4 10.0 9.3 9.4 9.9 9.6 7.9 ***** ***** MEAN DAILY TEMP. (MDT) (C) 0.4 3.2 4.9 13.8 16.5 24.8 30.4 26.6 22.8 17.7 12.2 ***** ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 8.1 114.8 292.9 175.0 60.0 0.1 0.0 ****** ****** HEATING DEG. DAYS(BASE 18 0C) 546.3 427.8 407.1 125.0 81.7 0.0 0.0 0.0 0.5 30.2 173.5 ****** ****** DEWPOINT (MEAN C) -7.4 -7.5 -5.1 -2.8 2.5 2.2 3.1 3.9 -1.4 -2.9 -2.4 ***** ***** MIXING RATIO (G/KG) 2.67 2.67 3.33 3.91 5.57 5.50 5.84 6.21 4.18 3.81 3.96 ****** ****** VAPOUR PRESSURE (HPA) 3.66 3.66 4.56 5.35 7.62 7.50 7.95 8.48 5.74 5.24 5.45 ****** ****** SATURATION DEF. 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OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 **** 1675 VECTOR WIND DIRECTION (MEAN) 231 308 231 258 247 225 184 190 211 220 209 *** *** VECTOR WIND MAGNITUDE(KNOTS) 1.3 0.9 1.7 3.4 2.9 3.6 3.5 3.4 3.3 2.4 1.4 **** **** WIND STEADINESES (MEAN %) 29.5 15.5 35.4 45.9 46.0 51.4 60.3 68.0 61.1 50.0 32.6 ***** ***** WIND SPEED (MEAN KNOTS) 4.4 5.8 4.8 7.4 6.3 7.0 5.8 5.0 5.4 4.8 4.3 **** **** FASTEST WIND DIRECTION 270 310 300 290 20 330 270 20 270 240 240 *** *** FASTEST WIND SPEED (KNOTS) 23 39 29 33 39 39 37 35 29 25 33 *** *** DAY 14 14 22 21 17 9 9 12 21 26 26 ** DAYS WITH SKY CLEAR (0-2)/8 10 9 12 10 10 24 28 27 29 27 15 **** **** DAYS WITH P.CLOUDY (3-6)/8 16 14 12 14 13 6 3 3 1 3 13 **** **** DAYS WITH CLOUDY (7-8)/8 5 6 7 6 8 0 0 1 0 1 2 **** **** DAYS WITH VISIBILITY =< 2 KM 9 1 3 0 1 0 1 0 0 0 0 **** **** DURATION OF SUNSHINE HOURS 112.4 108.2 157.6 147.4 179.5 309.5 332.2 318.4 308.4 270.4 155.7 ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 859.3 856.2 858.1 856.6 858.8 855.4 855.0 857.8 860.3 861.7 862.4 ****** ****** MAX. QFE PRESSURE IN HPA 869.4 864.2 868.1 861.1 864.1 861.9 859.0 865.3 865.9 867.1 871.3 ****** ****** DAY-HOUR 10- 6 16- 6 12- 6 20- 6 2- 9 11- 6 6- 6 31- 6 2- 6 30- 6 4- 6 **-** MIN. QFE PRESSURE IN HPA 851.0 848.0 847.0 850.0 853.6 849.0 849.8 850.7 854.1 856.6 852.0 ****** ****** DAY-HOUR 30-12 24-15 31- 3 18- 3 4- 9 27-12 10-15 1-15 17-15 5-15 26- 3 **-** MEAN QNH PRESSURE IN HPA 1019.0 1015.4 1017.6 1016.0 1018.4 1014.5 1014.1 1017.3 1020.2 1021.8 1022.5 ****** ****** MAX. QNH PRESSURE IN HPA 1030.6 1024.6 1029.1 1021.1 1024.5 1022.0 1018.7 1025.9 1026.6 1028.0 1032.8 ****** ****** DAY-HOUR 10- 6 16- 6 12- 6 20- 6 2- 9 11- 6 6- 6 31- 6 2- 6 30- 6 4- 6 **-** MIN. QNH PRESSURE IN HPA 1009.5 1006.0 1004.9 1008.3 1012.5 1007.2 1008.1 1009.1 1013.0 1015.9 1010.6 ****** ****** DAY-HOUR 30-12 24-15 31- 3 18- 3 4- 9 27-12 10-15 1-15 17-15 5-15 26- 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 859.3 856.2 858.2 856.8 859.1 856.0 855.7 858.6 860.9 862.3 862.6 ****** ****** MAX. QFE PRESSURE IN HPA 869.0 863.1 867.3 860.4 863.7 861.3 858.3 864.9 865.2 866.6 870.2 ****** ****** DAY 10 16 12 20 29 11 6 31 2 30 4 ** MIN. QFE PRESSURE IN HPA 852.4 849.4 847.0 850.0 854.4 850.3 852.5 853.2 855.9 858.7 852.0 ****** ****** DAY 1 25 31 18 4 27 10 1 18 6 26 ** MEAN QNH PRESSURE IN HPA 1019.0 1015.4 1017.8 1016.2 1018.8 1015.2 1014.8 1018.2 1020.9 1022.4 1022.8 ****** ****** MAX. QNH PRESSURE IN HPA 1030.2 1023.4 1028.2 1020.3 1024.1 1021.3 1017.9 1025.4 1025.8 1027.4 1031.5 ****** ****** DAY 10 16 12 20 29 11 6 31 2 30 4 ** MIN. QNH PRESSURE IN HPA 1011.1 1007.6 1004.9 1008.3 1013.4 1008.7 1011.2 1012.0 1015.1 1018.3 1010.6 ****** ****** DAY 1 25 31 18 4 27 10 1 18 6 26 ** MEAN QFF PRESSURE IN HPA 1023.1 1017.6 1019.0 1011.6 1012.4 1003.9 1000.7 1006.1 1011.5 1016.3 1019.8 ****** ****** MAX. QFF PRESSURE IN HPA 1035.7 1028.0 1034.6 1018.5 1022.0 1010.0 1005.2 1016.7 1018.7 1023.0 1028.0 ****** ****** DAY 10 16 12 8 3 11 14 31 2 30 4 ** MIN. QFF PRESSURE IN HPA 1013.5 1006.0 1003.2 1002.4 1006.6 995.8 997.0 997.6 1005.4 1010.7 1008.3 ****** ****** DAY 1 25 31 18 19 27 19 1 18 6 26 ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 860.2 857.1 859.1 857.7 859.7 856.5 856.2 859.2 861.7 863.1 863.5 ****** ****** MAX. QFE PRESSURE IN HPA 869.4 864.2 868.1 861.1 864.1 861.9 859.0 865.3 865.9 867.1 871.3 ****** ****** DAY 10 16 12 20 29 11 6 31 2 30 4 ** MIN. QFE PRESSURE IN HPA 854.2 850.3 847.9 850.6 854.6 850.8 852.9 853.6 856.4 859.9 854.3 ****** ****** DAY 17 11 31 18 4 27 10 1 18 6 26 ** MEAN QNH PRESSURE IN HPA 1020.1 1016.5 1018.8 1017.1 1019.5 1015.9 1015.5 1018.9 1021.8 1023.4 1023.8 ****** ****** MAX. QNH PRESSURE IN HPA 1030.6 1024.6 1029.1 1021.1 1024.5 1022.0 1018.7 1025.9 1026.6 1028.0 1032.8 ****** ****** DAY 10 16 12 20 29 11 6 31 2 30 4 ** MIN. QNH PRESSURE IN HPA 1013.2 1008.7 1005.9 1009.0 1013.6 1009.3 1011.7 1012.5 1015.7 1019.7 1013.3 ****** ****** DAY 17 11 31 18 4 27 10 1 18 6 26 ** 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 859.2 856.4 858.4 857.0 859.3 855.8 855.6 858.4 860.7 861.8 862.3 ****** ****** MAX. QFE PRESSURE IN HPA 868.9 863.2 868.1 860.5 864.1 860.9 858.6 864.4 865.6 865.9 870.2 ****** ****** DAY 10 16 12 8 2 11 6 31 2 30 4 ** MIN. QFE PRESSURE IN HPA 853.0 849.3 848.0 850.4 853.6 850.3 852.7 852.9 855.6 859.0 854.1 ****** ****** DAY 30 11 31 18 4 27 19 1 18 5 25 ** MEAN QNH PRESSURE IN HPA 1018.9 1015.6 1018.0 1016.4 1019.0 1015.0 1014.7 1018.0 1020.6 1021.9 1022.4 ****** ****** MAX. QNH PRESSURE IN HPA 1030.0 1023.5 1029.1 1020.4 1024.5 1020.8 1018.2 1024.9 1026.2 1026.6 1031.5 ****** ****** DAY 10 16 12 8 2 11 6 31 2 30 4 ** MIN. QNH PRESSURE IN HPA 1011.8 1007.5 1006.0 1008.8 1012.5 1008.7 1011.4 1011.7 1014.8 1018.7 1013.0 ****** ****** DAY 30 11 31 18 4 27 19 1 18 5 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 858.7 855.5 857.3 855.8 858.0 854.5 854.0 856.6 859.2 860.7 861.5 ****** ****** MAX. QFE PRESSURE IN HPA 867.8 862.3 866.6 859.8 863.5 859.0 857.0 862.5 863.3 865.3 868.9 ****** ****** DAY 9 16 12 26 2 10 14 31 2 29 4 ** MIN. QFE PRESSURE IN HPA 851.0 848.3 847.7 850.1 854.1 849.0 850.2 851.0 854.5 857.1 853.3 ****** ****** DAY 30 24 30 18 4 27 10 1 17 5 25 ** MEAN QNH PRESSURE IN HPA 1018.3 1014.6 1016.7 1015.0 1017.5 1013.5 1012.9 1016.0 1018.9 1020.6 1021.6 ****** ****** MAX. QNH PRESSURE IN HPA 1028.8 1022.5 1027.4 1019.6 1023.8 1018.7 1016.4 1022.7 1023.6 1025.9 1030.0 ****** ****** DAY 9 16 12 26 2 10 14 31 2 29 4 ** MIN. QNH PRESSURE IN HPA 1009.5 1006.4 1005.7 1008.4 1013.0 1007.2 1008.6 1009.5 1013.5 1016.5 1012.1 ****** ****** DAY 30 24 30 18 4 27 10 1 17 5 25 ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 859.2 855.9 857.5 855.9 857.9 854.2 853.6 856.3 859.1 860.9 862.0 ****** ****** MAX. QFE PRESSURE IN HPA 868.1 862.8 866.9 858.7 863.7 858.8 856.4 861.8 862.9 866.3 869.1 ****** ****** DAY 9 16 12 20 2 10 14 31 1 29 4 ** MIN. QFE PRESSURE IN HPA 851.0 848.0 848.3 850.6 853.6 849.0 849.8 850.7 854.1 856.6 853.0 ****** ****** DAY 30 24 30 18 4 27 10 1 17 5 25 ** MEAN QNH PRESSURE IN HPA 1018.9 1015.1 1016.9 1015.1 1017.4 1013.2 1012.5 1015.6 1018.8 1020.8 1022.1 ****** ****** MAX. QNH PRESSURE IN HPA 1029.1 1023.0 1027.7 1018.3 1024.1 1018.4 1015.7 1021.9 1023.1 1027.1 1030.3 ****** ****** DAY 9 16 12 20 2 10 14 31 1 29 4 ** MIN. QNH PRESSURE IN HPA 1009.5 1006.0 1006.4 1009.0 1012.5 1007.2 1008.1 1009.1 1013.0 1015.9 1011.8 ****** ****** DAY 30 24 30 18 4 27 10 1 17 5 25 ** MEAN QFF PRESSURE IN HPA 1023.0 1017.2 1017.9 1010.5 1011.0 1001.9 998.4 1003.6 1009.4 1014.7 1019.2 ****** ****** MAX. QFF PRESSURE IN HPA 1035.1 1027.1 1033.0 1017.2 1023.6 1007.9 1003.2 1013.3 1016.5 1022.6 1027.0 ****** ****** DAY 9 16 12 2 2 2 14 31 30 29 4 ** MIN. QFF PRESSURE IN HPA 1011.2 1003.6 1002.9 1002.7 1002.9 994.4 993.5 995.0 1002.9 1008.1 1006.6 ****** ****** DAY 2 24 30 22 31 27 18 1 17 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 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. 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(HPA) 3.28 ****** 7.50 13.71 18.73 32.03 34.35 33.32 30.37 14.94 4.37 4.49 ****** RELATIVE HUMIDITY (MEAN %) 57 *** 39 32 29 18 21 21 19 28 63 59 *** RELATIVE HUMIDITY (MAX. %) 67 *** 57 48 43 31 29 30 28 40 79 73 *** RELATIVE HUMIDITY (MIN. %) 48 *** 27 21 20 11 16 16 14 20 51 47 *** RELATIVE HUMIDITY (MEAN% 03UTC) 64 *** 52 45 41 28 29 30 28 38 74 69 *** RELATIVE HUMIDITY (MEAN% 09UTC) 52 *** 35 27 25 18 19 19 16 24 58 52 *** RELATIVE HUMIDITY (MEAN% 15UTC) 59 *** 34 28 25 12 17 19 18 29 64 63 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.9 ****** 60.3 25.0 8.9 2.0 0.0 1.0 0.0 5.1 66.6 19.2 ****** DAYS WITH PRECIPITATION >=10 1 **** 3 0 0 0 0 0 0 0 2 1 **** DAYS WITH PRECIPITATION >= 5 2 **** 4 3 0 0 0 0 0 0 6 1 **** DAYS WITH PRECIPITATION >= 1 6 **** 9 6 5 2 0 1 0 2 10 3 **** DAYS WITH PRECIPITATION 8 **** 13 10 12 3 0 1 0 3 17 6 **** GREATEST DAILY PRECIPITATION 22.0 ****** 17.0 8.0 3.0 1.0 0.0 1.0 0.0 3.0 16.0 13.0 ****** DAY 8 ** 8 8 14 1 ** 29 ** 29 3 16 DAY WITH THUNDER STORM 0 **** 1 0 2 1 0 1 0 0 0 0 **** DAYS WITH SNOW OR SLEET 7 **** 4 0 0 0 0 0 0 0 2 4 **** DAYS WITH DUST 0 **** 0 1 4 1 0 0 0 0 1 0 **** WIND DIRECTION (PREVAILING) 225 *** 225 225 225 225 225 180 180 180 180 180 *** PREVAILING WIND SPEED(KNOTS) 4.1 **** 7.0 7.7 7.6 7.2 5.7 5.0 5.3 4.8 4.3 3.1 **** PREVAILING WIND PERCENT 28.4 ***** 21.3 30.7 27.7 49.3 39.3 44.5 34.0 44.5 34.7 37.4 ***** CALMS PERCENT OF WIND 14.8 ***** 2.6 4.7 7.1 2.0 4.0 5.8 8.0 11.0 13.3 22.6 ***** NO. OF WIND OBSERVATION 155 **** 155 150 155 150 150 155 150 155 150 155 1680 VECTOR WIND DIRECTION (MEAN) 237 *** 265 255 258 231 202 187 158 194 161 174 *** VECTOR WIND MAGNITUDE(KNOTS) 1.5 **** 2.6 4.1 4.3 4.1 3.4 3.3 2.8 2.5 1.6 1.4 **** WIND STEADINESES (MEAN %) 48.4 ***** 41.3 60.3 61.4 62.1 68.0 73.3 65.1 59.5 43.2 58.3 ***** WIND SPEED (MEAN KNOTS) 3.1 **** 6.3 6.8 7.0 6.6 5.0 4.5 4.3 4.2 3.7 2.4 **** FASTEST WIND DIRECTION 270 *** 320 300 280 190 50 330 220 240 280 240 *** FASTEST WIND SPEED (KNOTS) 23 *** 33 39 41 56 14 19 21 31 33 17 *** DAY 25 ** 9 20 23 3 28 8 26 11 10 10 DAYS WITH SKY CLEAR (0-2)/8 18 **** 15 8 9 27 27 30 28 18 9 13 **** DAYS WITH P.CLOUDY (3-6)/8 6 **** 11 17 16 3 4 1 2 11 10 9 **** DAYS WITH CLOUDY (7-8)/8 7 **** 5 5 6 0 0 0 0 2 11 9 **** DAYS WITH VISIBILITY =< 2 KM 1 **** 0 0 0 1 0 0 0 0 2 2 **** DURATION OF SUNSHINE HOURS 148.4 ****** 197.2 188.7 240.8 356.5 347.3 346.2 308.0 227.7 126.1 144.0 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.4 ****** 858.7 857.8 858.3 856.7 856.8 858.5 859.6 865.3 861.8 863.0 ****** MAX. QFE PRESSURE IN HPA 868.9 ****** 865.6 864.6 863.8 864.5 861.7 861.6 864.8 870.5 867.2 868.0 ****** DAY 6 ** 31 1 9 23 27 25 23 17 22 26 MIN. QFE PRESSURE IN HPA 850.2 ****** 849.4 852.3 855.6 853.4 852.7 853.6 855.6 859.0 851.6 856.3 ****** DAY 9 ** 22 13 7 4 13 12 14 2 14 5 MEAN QNH PRESSURE IN HPA 1020.2 ****** 1018.3 1017.3 1017.9 1016.0 1016.1 1018.1 1019.3 1025.9 1021.9 1023.3 ****** MAX. QNH PRESSURE IN HPA 1030.0 ****** 1026.2 1025.1 1024.2 1025.0 1021.8 1021.7 1025.3 1031.9 1028.1 1029.0 ****** DAY 6 ** 31 1 9 23 27 25 23 17 22 26 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 860.0 ****** 857.8 856.6 857.2 854.6 854.5 856.3 857.4 863.9 860.9 862.4 ****** MAX. QFE PRESSURE IN HPA 868.6 ****** 863.6 861.6 862.4 861.7 859.8 859.2 863.2 868.0 866.7 866.6 ****** DAY 6 ** 31 16 9 22 27 31 23 17 22 6 MIN. 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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 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.8 5.4 12.0 17.8 21.7 27.7 31.4 31.5 23.3 17.2 12.3 3.3 17.4 MINIMUN AIR TEMPERATURE (C) 2.1 1.5 7.4 12.3 15.3 21.1 25.2 25.5 17.7 12.6 8.2 0.0 12.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 17 29 31 2 0 0 0 79 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 7 7 DAYS WITH FREEZING MIN.<= 0 6 8 0 0 0 0 0 0 0 0 0 16 30 TEMPERATURE RECORDS LOWEST(C) -1.0 -3.6 2.4 2.0 8.5 11.8 17.8 23.0 14.5 9.0 2.0 -7.2 -7.2 DAY 12 4 17 5 7 5 1 10 21 25 26 7 MAXIMUM AIR TEMPERATURE (C) 8.3 8.2 15.1 21.6 25.0 31.4 35.0 35.0 27.0 20.5 15.1 6.3 20.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 25 31 31 5 0 0 0 96 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 3 3 TEMPERATURE RECORDS HIGHEST(C) 16.0 14.8 22.0 29.0 31.0 34.4 38.8 38.0 34.0 23.6 19.5 12.6 38.8 DAY 3 27 31 22 31 16 30 1 1 2 3 3 DIF. BETWEEN (MAX.-MIN.) (C) 6.2 6.7 7.7 9.3 9.7 10.3 9.8 9.5 9.3 7.9 6.9 6.3 8.3 MEAN DAILY TEMP. (MDT) (C) 5.2 4.9 11.2 16.9 20.2 26.3 30.1 30.3 22.3 16.6 11.6 3.2 16.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 12.3 33.8 160.1 283.4 287.3 48.5 0.0 0.0 0.0 825.5 HEATING DEG. DAYS(BASE 18 0C) 395.7 367.7 209.6 68.7 21.4 0.0 0.0 0.0 0.0 48.7 190.6 460.3 1762.6 DEWPOINT (MEAN C) -2.3 -5.8 -4.2 -1.1 -0.8 1.1 4.8 2.8 0.1 3.3 0.9 -6.6 -0.6 MIXING RATIO (G/KG) 3.91 2.99 3.54 4.36 4.48 5.16 6.49 5.77 4.78 6.04 5.10 2.94 4.63 VAPOUR PRESSURE (HPA) 5.37 4.10 4.85 5.98 6.13 7.01 8.81 7.85 6.57 8.30 6.99 4.05 6.33 SATURATION DEF. (HPA) 4.01 5.10 9.51 15.29 20.68 30.81 38.07 38.92 22.52 11.55 7.53 4.01 17.33 RELATIVE HUMIDITY (MEAN %) 59 47 37 31 26 20 20 18 24 44 50 50 36 RELATIVE HUMIDITY (MAX. %) 75 63 56 45 41 30 27 24 32 57 64 64 48 RELATIVE HUMIDITY (MIN. %) 46 36 25 22 16 14 15 13 18 32 39 38 26 RELATIVE HUMIDITY (MEAN% 03UTC) 69 60 51 42 39 29 27 23 31 54 62 60 46 RELATIVE HUMIDITY (MEAN% 09UTC) 55 42 34 27 21 18 18 16 21 36 43 46 31 RELATIVE HUMIDITY (MEAN% 15UTC) 61 46 34 28 22 15 17 16 21 44 51 49 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 53.4 51.6 30.6 19.2 38.5 3.0 0.0 0.0 0.0 35.7 146.8 6.2 385.0 DAYS WITH PRECIPITATION >=10 2 1 1 1 2 0 0 0 0 1 5 0 13 DAYS WITH PRECIPITATION >= 5 5 3 2 1 3 0 0 0 0 2 7 0 23 DAYS WITH PRECIPITATION >= 1 8 4 7 4 5 2 0 0 0 4 12 2 48 DAYS WITH PRECIPITATION 10 8 11 8 9 3 0 0 3 12 15 8 87 GREATEST DAILY PRECIPITATION 12.0 37.0 14.0 15.0 12.0 2.0 0.0 0.0 0.0 23.0 37.0 3.0 37.0 DAY 17 1 12 30 6 3 ** ** ** 4 26 1 DAY WITH THUNDER STORM 2 0 0 2 2 2 0 0 0 2 1 0 11 DAYS WITH SNOW OR SLEET 2 4 0 0 0 0 0 0 0 0 0 3 9 DAYS WITH DUST 0 0 0 6 3 2 0 3 0 0 0 1 15 WIND DIRECTION (PREVAILING) 180 180 225 180 225 180 180 180 180 180 45 180 180 PREVAILING WIND SPEED(KNOTS) 4.2 4.2 8.3 6.2 9.0 7.2 6.2 6.5 5.7 5.1 5.8 4.6 5.8 PREVAILING WIND PERCENT 23.2 23.6 24.5 28.7 26.6 38.7 52.3 51.6 50.0 31.0 18.7 23.4 32.2 CALMS PERCENT OF WIND 31.6 18.6 10.3 7.3 5.2 1.3 2.6 3.9 4.0 9.0 10.7 16.2 10.0 NO. OF WIND OBSERVATION 155 140 155 150 154 150 155 155 150 155 150 154 1823 VECTOR WIND DIRECTION (MEAN) 210 231 225 233 226 204 179 162 194 206 242 233 207 VECTOR WIND MAGNITUDE(KNOTS) 1.7 3.3 2.8 2.9 3.8 3.7 4.0 4.1 3.7 2.2 0.4 2.2 2.7 WIND STEADINESES (MEAN %) 50.0 62.3 48.3 42.6 52.8 53.6 70.2 73.2 71.2 44.0 8.0 45.8 48.2 WIND SPEED (MEAN KNOTS) 3.4 5.3 5.8 6.8 7.2 6.9 5.7 5.6 5.2 5.0 5.0 4.8 5.6 FASTEST WIND DIRECTION 270 270 280 270 320 140 140 150 220 270 240 270 320 FASTEST WIND SPEED (KNOTS) 33 33 37 39 45 37 21 21 23 31 41 31 45 DAY 4 3 7 27 4 1 5 30 20 2 25 5 DAYS WITH SKY CLEAR (0-2)/8 14 12 11 16 18 28 31 29 22 10 11 13 215 DAYS WITH P.CLOUDY (3-6)/8 8 13 15 10 11 2 0 2 8 18 10 12 109 DAYS WITH CLOUDY (7-8)/8 9 3 5 4 2 0 0 0 0 3 9 6 41 DAYS WITH VISIBILITY =< 2 KM 2 1 0 0 0 0 0 0 0 0 0 2 5 DURATION OF SUNSHINE HOURS 150.6 164.9 216.6 220.2 285.3 341.4 368.7 354.9 271.7 214.9 170.8 170.8 2930.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 860.1 857.2 857.9 859.2 858.1 853.9 852.8 854.6 862.2 863.7 860.3 861.4 858.5 MAX. QFE PRESSURE IN HPA 869.9 865.1 864.8 870.3 863.9 860.3 858.0 859.6 870.5 869.8 868.2 868.2 870.5 DAY-HOUR 10- 6 18- 6 18- 6 5- 6 21- 6 9- 6 13- 6 16- 6 23- 6 10- 6 2- 6 22- 6 MIN. QFE PRESSURE IN HPA 849.8 848.5 847.8 850.9 851.3 847.6 848.2 848.1 855.1 856.8 849.9 847.4 847.4 DAY-HOUR 16-12 1- 3 7-12 2-15 1-15 4-15 8-15 2-15 2-15 14-15 26- 3 4- 3 MEAN QNH PRESSURE IN HPA 1020.0 1016.6 1017.4 1018.9 1017.6 1012.8 1011.5 1013.7 1022.4 1024.1 1020.1 1021.4 1018.0 MAX. QNH PRESSURE IN HPA 1031.2 1025.7 1025.3 1031.6 1024.3 1020.2 1017.5 1019.4 1031.9 1031.1 1029.2 1029.2 1031.9 DAY-HOUR 10- 6 18- 6 18- 6 5- 6 21- 6 9- 6 13- 6 16- 6 23- 6 10- 6 2- 6 22- 6 MIN. QNH PRESSURE IN HPA 1008.1 1006.6 1005.8 1009.4 1009.8 1005.6 1006.3 1006.1 1014.2 1016.1 1008.2 1005.3 1005.3 DAY-HOUR 16-12 1- 3 7-12 2-15 1-15 4-15 8-15 2-15 2-15 14-15 26- 3 4- 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 860.2 857.1 858.2 859.8 858.6 854.7 853.7 855.4 862.8 864.3 860.7 861.5 858.9 MAX. QFE PRESSURE IN HPA 868.9 863.8 863.8 869.0 863.1 859.9 857.4 859.4 869.6 869.0 866.6 867.3 869.6 DAY 10 19 18 5 21 9 14 16 23 10 2 8 MIN. QFE PRESSURE IN HPA 851.9 848.5 848.8 851.8 853.0 849.7 849.6 850.6 857.3 859.4 849.9 847.4 847.4 DAY 26 1 12 2 2 22 8 2 2 15 26 4 MEAN QNH PRESSURE IN HPA 1020.1 1016.5 1017.8 1019.6 1018.2 1013.7 1012.6 1014.6 1023.1 1024.8 1020.6 1021.6 1018.6 MAX. QNH PRESSURE IN HPA 1030.0 1024.2 1024.2 1030.2 1023.4 1019.7 1016.8 1019.1 1030.8 1030.2 1027.4 1028.2 1030.8 DAY 10 19 18 5 21 9 14 16 23 10 2 8 MIN. QNH PRESSURE IN HPA 1010.5 1006.6 1007.0 1010.4 1011.8 1008.0 1007.9 1009.0 1016.7 1019.1 1008.2 1005.3 1005.3 DAY 26 1 12 2 2 22 8 2 2 15 26 4 MEAN QFF PRESSURE IN HPA 1020.9 1017.3 1014.9 1013.4 1009.8 1001.7 998.5 1000.7 1013.8 1018.9 1017.5 1023.9 1012.6 MAX. QFF PRESSURE IN HPA 1031.0 1028.3 1022.5 1029.2 1015.5 1008.2 1005.2 1005.9 1023.9 1025.2 1023.2 1035.1 1035.1 DAY 10 19 18 5 18 9 2 16 23 9 2 8 MIN. QFF PRESSURE IN HPA 1010.8 1004.5 1004.6 1004.1 1005.3 994.4 993.0 993.5 1003.7 1011.9 1007.5 1004.7 993.0 DAY 5 1 12 26 29 22 8 2 1 15 26 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 861.2 858.1 859.1 860.4 859.2 855.3 854.2 856.1 863.6 865.0 861.4 862.4 859.7 MAX. QFE PRESSURE IN HPA 869.9 865.1 864.8 870.3 863.9 860.3 858.0 859.6 870.5 869.8 868.2 868.2 870.5 DAY 10 18 18 5 21 9 13 16 23 10 2 22 MIN. QFE PRESSURE IN HPA 853.1 849.1 849.6 853.0 853.3 850.9 850.0 851.1 857.7 860.1 850.2 848.3 848.3 DAY 26 1 12 2 1 22 8 2 1 15 26 4 MEAN QNH PRESSURE IN HPA 1021.2 1017.6 1018.7 1020.3 1018.9 1014.4 1013.2 1015.3 1024.0 1025.6 1021.5 1022.6 1019.4 MAX. QNH PRESSURE IN HPA 1031.2 1025.7 1025.3 1031.6 1024.3 1020.2 1017.5 1019.4 1031.9 1031.1 1029.2 1029.2 1031.9 DAY 10 18 18 5 21 9 13 16 23 10 2 22 MIN. QNH PRESSURE IN HPA 1011.9 1007.3 1007.9 1011.8 1012.1 1009.4 1008.3 1009.6 1017.2 1019.9 1008.6 1006.4 1006.4 DAY 26 1 12 2 1 22 8 2 1 15 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 860.3 857.4 858.3 859.6 858.5 854.4 853.2 855.1 862.5 863.8 860.2 861.4 858.7 MAX. QFE PRESSURE IN HPA 868.4 864.7 863.8 869.8 863.1 859.6 856.9 858.6 869.3 869.0 867.0 866.8 869.8 DAY 10 18 18 5 21 8 13 15 23 10 2 8 MIN. QFE PRESSURE IN HPA 850.6 850.0 849.1 852.4 852.4 850.3 849.6 850.5 856.9 859.4 850.1 847.9 847.9 DAY 16 1 12 2 1 22 8 2 1 15 26 4 MEAN QNH PRESSURE IN HPA 1020.2 1016.9 1017.9 1019.4 1018.1 1013.4 1012.0 1014.2 1022.7 1024.2 1020.0 1021.4 1018.4 MAX. QNH PRESSURE IN HPA 1029.5 1025.2 1024.2 1031.1 1023.4 1019.4 1016.3 1018.2 1030.5 1030.2 1027.9 1027.6 1031.1 DAY 10 18 18 5 21 8 13 15 23 10 2 8 MIN. QNH PRESSURE IN HPA 1009.0 1008.3 1007.3 1011.1 1011.1 1008.7 1007.9 1008.9 1016.3 1019.1 1008.4 1005.9 1005.9 DAY 16 1 12 2 1 22 8 2 1 15 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 859.2 856.5 857.0 858.3 857.2 852.8 851.6 853.6 861.1 862.8 859.5 860.6 857.5 MAX. QFE PRESSURE IN HPA 867.4 863.4 862.4 868.0 861.8 857.9 855.6 857.5 868.2 867.7 865.9 866.4 868.2 DAY 9 18 18 5 21 8 13 15 23 9 2 7 MIN. QFE PRESSURE IN HPA 849.8 849.4 847.8 851.4 851.6 848.9 848.8 849.2 855.6 857.8 851.6 848.1 847.8 DAY 16 12 7 2 1 28 30 2 2 2 26 4 MEAN QNH PRESSURE IN HPA 1018.9 1015.8 1016.4 1017.9 1016.6 1011.6 1010.2 1012.5 1021.1 1023.0 1019.2 1020.5 1017.0 MAX. QNH PRESSURE IN HPA 1028.3 1023.7 1022.6 1029.0 1021.9 1017.4 1014.8 1016.9 1029.2 1028.7 1026.6 1027.2 1029.2 DAY 9 18 18 5 21 8 13 15 23 9 2 7 MIN. QNH PRESSURE IN HPA 1008.1 1007.6 1005.8 1009.9 1010.2 1007.1 1007.0 1007.4 1014.8 1017.3 1010.2 1006.1 1005.8 DAY 16 12 7 2 1 28 30 2 2 2 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 859.7 856.9 857.1 858.1 856.9 852.3 851.1 853.0 861.0 862.8 859.6 861.1 857.5 MAX. QFE PRESSURE IN HPA 867.3 863.8 862.4 868.1 861.3 857.4 855.7 857.0 868.0 868.1 866.1 867.4 868.1 DAY 9 18 18 5 21 8 13 15 23 10 2 7 MIN. QFE PRESSURE IN HPA 851.2 849.6 848.4 850.9 851.3 847.6 848.2 848.1 855.1 856.8 852.8 848.4 847.6 DAY 25 12 12 2 1 4 8 2 2 14 25 3 MEAN QNH PRESSURE IN HPA 1019.5 1016.2 1016.5 1017.6 1016.3 1010.9 1009.6 1011.8 1021.0 1023.1 1019.4 1021.1 1016.9 MAX. QNH PRESSURE IN HPA 1028.2 1024.2 1022.6 1029.1 1021.3 1016.8 1014.9 1016.4 1029.0 1029.1 1026.8 1028.3 1029.1 DAY 9 18 18 5 21 8 13 15 23 10 2 7 MIN. QNH PRESSURE IN HPA 1009.7 1007.9 1006.5 1009.4 1009.8 1005.6 1006.3 1006.1 1014.2 1016.1 1011.5 1006.5 1005.6 DAY 25 12 12 2 1 4 8 2 2 14 25 3 MEAN QFF PRESSURE IN HPA 1020.3 1017.2 1013.6 1011.4 1007.8 999.0 995.4 997.9 1011.9 1017.2 1016.3 1023.5 1011.0 MAX. QFF PRESSURE IN HPA 1029.6 1027.4 1020.7 1029.5 1014.1 1005.4 1002.1 1002.6 1021.7 1024.1 1022.6 1035.5 1035.5 DAY 10 18 3 5 18 8 13 15 23 10 2 7 MIN. QFF PRESSURE IN HPA 1011.0 1009.0 1001.6 1003.3 1001.9 994.6 990.8 990.7 1001.8 1009.3 1008.6 1004.5 990.7 DAY 5 12 7 26 13 22 30 2 1 2 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.8 7.5 11.6 16.6 21.1 26.8 32.8 32.5 25.7 18.1 13.7 4.0 18.1 MINIMUN AIR TEMPERATURE (C) 2.6 3.5 6.7 11.2 15.2 20.1 26.2 26.0 19.6 12.9 8.4 0.4 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 12 31 30 13 0 0 0 86 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 4 3 0 0 0 0 0 0 0 0 1 12 20 TEMPERATURE RECORDS LOWEST(C) -1.0 -1.0 1.7 5.5 9.2 14.0 21.7 19.5 12.5 7.0 -1.8 -2.5 -2.5 DAY 21 25 27 7 9 1 1 31 22 19 26 20 MAXIMUM AIR TEMPERATURE (C) 9.9 10.5 15.1 19.9 24.6 30.3 36.3 35.6 29.0 21.2 17.1 6.7 21.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 19 31 31 16 0 0 0 97 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.0 15.2 20.6 25.0 29.6 34.4 41.0 38.5 32.7 29.5 22.6 12.0 41.0 DAY 31 4 24 3 22 29 16 5 11 4 2 1 DIF. BETWEEN (MAX.-MIN.) (C) 7.3 7.0 8.4 8.7 9.4 10.2 10.1 9.6 9.4 8.3 8.7 6.3 8.7 MEAN DAILY TEMP. (MDT) (C) 6.2 7.0 10.9 15.6 19.9 25.2 31.3 30.8 24.3 17.0 12.8 3.6 17.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 18.0 127.8 317.8 304.1 110.5 5.5 0.0 0.0 883.9 HEATING DEG. DAYS(BASE 18 0C) 364.6 308.1 220.1 77.0 12.7 0.0 0.0 0.0 0.8 62.7 157.5 447.6 1650.9 DEWPOINT (MEAN C) -5.0 -4.6 -6.4 0.1 1.9 3.1 4.4 2.0 0.0 -1.0 -7.2 -5.2 -1.5 MIXING RATIO (G/KG) 3.19 3.29 3.09 4.84 5.41 5.82 6.44 5.39 4.64 4.26 2.85 3.12 4.36 VAPOUR PRESSURE (HPA) 4.40 4.51 4.24 6.62 7.41 7.92 8.73 7.35 6.35 5.87 3.92 4.31 5.97 SATURATION DEF. (HPA) 5.65 6.10 9.76 12.67 18.27 27.86 41.78 42.23 27.53 15.58 12.49 3.96 18.66 RELATIVE HUMIDITY (MEAN %) 45 45 32 37 32 24 18 16 21 30 25 55 32 RELATIVE HUMIDITY (MAX. %) 61 61 46 52 44 34 24 23 33 42 35 66 43 RELATIVE HUMIDITY (MIN. %) 34 35 23 26 22 15 13 11 15 24 18 46 24 RELATIVE HUMIDITY (MEAN% 03UTC) 59 58 44 49 41 33 24 23 33 41 33 63 42 RELATIVE HUMIDITY (MEAN% 09UTC) 39 42 30 33 28 23 19 15 18 27 22 53 29 RELATIVE HUMIDITY (MEAN% 15UTC) 44 43 29 34 28 17 14 13 18 28 25 55 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 6.5 19.6 31.2 44.2 16.4 2.4 0.0 0.0 0.8 4.2 0.0 23.7 149.0 DAYS WITH PRECIPITATION >=10 0 1 1 1 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 0 1 2 1 0 0 0 0 0 0 0 3 7 DAYS WITH PRECIPITATION >= 1 2 4 6 5 6 1 0 0 0 1 0 6 31 DAYS WITH PRECIPITATION 5 9 7 10 12 4 0 0 3 2 0 6 58 GREATEST DAILY PRECIPITATION 4.1 11.0 16.0 31.0 4.2 2.0 0.0 0.0 0.8 3.3 0.0 6.0 31.0 DAY 17 24 17 24 26 1 ** ** 22 25 ** 13 DAY WITH THUNDER STORM 0 0 1 0 0 1 0 0 0 1 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 4 4 DAYS WITH DUST 0 0 0 1 0 0 0 0 0 0 1 0 2 WIND DIRECTION (PREVAILING) 180 180 180 180 180 180 180 180 180 180 180 225 180 PREVAILING WIND SPEED(KNOTS) 4.8 5.5 6.3 7.4 8.1 7.5 6.3 6.0 6.4 6.6 5.4 5.3 6.3 PREVAILING WIND PERCENT 23.2 30.7 26.5 24.7 25.2 36.9 51.3 53.5 38.7 50.3 30.0 24.5 34.2 CALMS PERCENT OF WIND 24.5 17.9 14.2 8.7 20.0 12.1 14.1 9.7 14.7 10.3 13.3 17.4 14.7 NO. OF WIND OBSERVATION 155 140 155 150 155 149 156 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 231 199 220 219 194 204 186 172 193 188 208 212 201 VECTOR WIND MAGNITUDE(KNOTS) 2.6 2.5 2.8 3.7 2.7 4.2 3.8 3.8 3.4 3.4 2.9 1.8 3.0 WIND STEADINESES (MEAN %) 59.1 59.5 43.7 50.0 42.2 61.8 73.1 76.0 63.0 63.0 54.7 50.0 54.5 WIND SPEED (MEAN KNOTS) 4.4 4.2 6.4 7.4 6.4 6.8 5.2 5.0 5.4 5.4 5.3 3.6 5.5 FASTEST WIND DIRECTION 250 320 290 160 290 230 210 210 290 190 270 220 290 FASTEST WIND SPEED (KNOTS) 35 31 39 35 45 37 17 16 33 25 39 21 45 DAY 17 8 17 23 8 7 1 2 21 11 25 2 DAYS WITH SKY CLEAR (0-2)/8 24 12 19 7 13 24 27 29 26 22 19 15 237 DAYS WITH P.CLOUDY (3-6)/8 2 10 6 15 13 6 4 2 4 8 11 10 91 DAYS WITH CLOUDY (7-8)/8 5 6 6 8 5 0 0 0 0 1 0 6 37 DAYS WITH VISIBILITY =< 2 KM 3 1 0 1 0 0 0 0 1 0 0 4 10 DURATION OF SUNSHINE HOURS 218.9 186.4 247.4 228.7 254.8 347.8 356.5 364.1 318.0 280.4 247.5 155.9 3206.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 861.4 858.9 858.3 857.3 859.5 855.2 852.2 855.7 858.0 862.0 860.9 862.4 858.5 MAX. QFE PRESSURE IN HPA 870.1 865.6 867.9 863.7 865.9 861.2 857.2 861.5 865.5 871.0 868.5 867.7 871.0 DAY-HOUR 7- 6 12- 6 3- 6 11- 6 26- 6 1- 6 4- 6 25- 6 13- 6 27- 6 16- 6 11- 6 MIN. QFE PRESSURE IN HPA 854.4 847.9 848.5 850.9 854.5 847.8 846.3 851.6 850.9 853.3 851.8 856.8 846.3 DAY-HOUR 11-12 5-15 26-12 16-15 7-12 22-15 16-15 22-15 19-15 12-15 25-15 17-15 MEAN QNH PRESSURE IN HPA 1021.4 1018.6 1017.8 1016.7 1019.2 1014.3 1010.9 1014.9 1017.5 1022.1 1020.8 1022.5 1018.1 MAX. QNH PRESSURE IN HPA 1031.4 1026.2 1028.9 1024.1 1026.6 1021.2 1016.6 1021.5 1026.1 1032.4 1029.6 1028.7 1032.4 DAY-HOUR 7- 6 12- 6 3- 6 11- 6 26- 6 1- 6 4- 6 25- 6 13- 6 27- 6 16- 6 11- 6 MIN. QNH PRESSURE IN HPA 1013.4 1005.9 1006.6 1009.4 1013.5 1005.8 1004.1 1010.2 1009.4 1012.1 1010.4 1016.1 1004.1 DAY-HOUR 11-12 5-15 26-12 16-15 7-12 22-15 16-15 22-15 19-15 12-15 25-15 17-15 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 861.7 859.5 858.6 857.9 860.1 855.7 852.6 856.2 858.7 862.7 861.5 862.7 859.0 MAX. QFE PRESSURE IN HPA 868.9 864.4 866.6 863.1 864.4 860.5 855.7 860.1 864.4 870.2 867.8 867.3 870.2 DAY 7 12 3 11 26 1 4 25 13 27 16 11 MIN. QFE PRESSURE IN HPA 856.1 851.3 849.4 853.0 856.7 849.1 847.5 852.1 853.7 856.9 854.1 858.4 847.5 DAY 12 5 26 25 7 22 16 23 20 12 26 4 MEAN QNH PRESSURE IN HPA 1021.7 1019.2 1018.2 1017.4 1019.9 1014.8 1011.3 1015.5 1018.3 1022.9 1021.5 1022.9 1018.7 MAX. QNH PRESSURE IN HPA 1030.0 1024.9 1027.4 1023.4 1024.9 1020.4 1014.9 1019.9 1024.9 1031.5 1028.8 1028.2 1031.5 DAY 7 12 3 11 26 1 4 25 13 27 16 11 MIN. QNH PRESSURE IN HPA 1015.3 1009.8 1007.6 1011.8 1016.0 1007.3 1005.5 1010.7 1012.6 1016.3 1013.0 1018.0 1005.5 DAY 12 5 26 25 7 22 16 23 20 12 26 4 MEAN QFF PRESSURE IN HPA 1022.1 1018.9 1015.7 1011.7 1011.7 1003.3 996.3 1000.9 1007.6 1016.8 1018.0 1025.2 1012.3 MAX. QFF PRESSURE IN HPA 1030.8 1024.5 1026.5 1019.4 1016.5 1013.4 1001.0 1006.0 1017.3 1027.6 1028.0 1031.5 1031.5 DAY 7 13 3 7 26 1 4 25 22 27 28 11 MIN. QFF PRESSURE IN HPA 1014.2 1007.0 1002.7 1006.0 1007.1 993.0 988.5 995.6 1001.4 1007.6 1010.7 1017.8 988.5 DAY 12 5 26 19 6 22 16 8 20 5 11 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 862.7 860.2 859.6 858.6 860.7 856.5 853.5 857.2 859.5 863.4 862.3 863.7 859.8 MAX. QFE PRESSURE IN HPA 870.1 865.6 867.9 863.7 865.9 861.2 857.2 861.5 865.5 871.0 868.5 867.7 871.0 DAY 7 12 3 11 26 1 4 25 13 27 16 11 MIN. QFE PRESSURE IN HPA 857.1 851.7 849.8 854.0 857.3 849.8 848.8 853.4 854.4 857.3 854.7 860.0 848.8 DAY 12 5 26 25 7 22 16 23 20 12 26 4 MEAN QNH PRESSURE IN HPA 1022.9 1020.1 1019.3 1018.2 1020.7 1015.8 1012.3 1016.6 1019.2 1023.8 1022.4 1024.0 1019.6 MAX. QNH PRESSURE IN HPA 1031.4 1026.2 1028.9 1024.1 1026.6 1021.2 1016.6 1021.5 1026.1 1032.4 1029.6 1028.7 1032.4 DAY 7 12 3 11 26 1 4 25 13 27 16 11 MIN. QNH PRESSURE IN HPA 1016.5 1010.3 1008.1 1012.9 1016.7 1008.1 1007.0 1012.2 1013.4 1016.7 1013.7 1019.8 1007.0 DAY 12 5 26 25 7 22 16 23 20 12 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 861.5 859.2 858.7 857.8 859.8 855.7 852.9 856.4 858.4 862.3 861.0 862.5 858.9 MAX. QFE PRESSURE IN HPA 869.1 864.3 867.0 862.7 865.9 860.6 856.4 860.4 864.2 870.4 867.3 866.5 870.4 DAY 7 12 3 11 26 1 4 25 13 25 16 10 MIN. QFE PRESSURE IN HPA 856.1 851.4 849.1 853.2 856.0 849.6 848.4 853.1 853.5 856.3 853.6 858.6 848.4 DAY 11 5 26 25 7 22 16 8 20 12 26 4 MEAN QNH PRESSURE IN HPA 1021.5 1018.9 1018.4 1017.3 1019.6 1014.9 1011.7 1015.7 1018.0 1022.4 1021.0 1022.6 1018.5 MAX. QNH PRESSURE IN HPA 1030.3 1024.8 1027.9 1022.9 1026.6 1020.5 1015.7 1020.3 1024.6 1031.8 1028.2 1027.3 1031.8 DAY 7 12 3 11 26 1 4 25 13 25 16 10 MIN. QNH PRESSURE IN HPA 1015.3 1009.9 1007.3 1012.0 1015.2 1007.9 1006.5 1011.9 1012.4 1015.6 1012.5 1018.2 1006.5 DAY 11 5 26 25 7 22 16 8 20 12 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 860.4 857.8 857.3 856.3 858.5 854.4 851.4 854.7 856.9 860.9 859.7 861.4 857.5 MAX. QFE PRESSURE IN HPA 868.2 863.2 865.2 861.4 864.9 859.5 854.8 858.2 862.3 869.6 865.8 865.7 869.6 DAY 7 1 3 11 26 1 4 25 13 25 15 10 MIN. QFE PRESSURE IN HPA 854.4 848.5 848.5 851.7 854.5 848.4 846.9 851.8 851.7 854.6 852.0 857.6 846.9 DAY 11 5 26 16 7 22 16 8 19 12 26 17 MEAN QNH PRESSURE IN HPA 1020.2 1017.3 1016.7 1015.5 1018.1 1013.3 1010.0 1013.8 1016.2 1020.9 1019.4 1021.4 1016.9 MAX. QNH PRESSURE IN HPA 1029.2 1023.5 1025.8 1021.4 1025.4 1019.2 1013.8 1017.8 1022.5 1030.8 1026.5 1026.4 1030.8 DAY 7 1 3 11 26 1 4 25 13 25 15 10 MIN. QNH PRESSURE IN HPA 1013.4 1006.6 1006.6 1010.3 1013.5 1006.5 1004.8 1010.4 1010.3 1013.6 1010.6 1017.1 1004.8 DAY 11 5 26 16 7 22 16 8 19 12 26 17 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 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 860.7 857.8 857.1 856.0 858.3 853.7 850.8 854.2 856.5 860.7 860.0 861.7 857.3 MAX. QFE PRESSURE IN HPA 868.5 863.6 864.8 860.7 863.9 858.8 854.6 857.2 861.9 869.6 866.7 865.8 869.6 DAY 7 1 3 12 26 1 4 25 13 25 15 9 MIN. QFE PRESSURE IN HPA 855.8 847.9 848.5 850.9 854.6 847.8 846.3 851.6 850.9 853.3 851.8 856.8 846.3 DAY 1 5 26 16 7 22 16 22 19 12 25 17 MEAN QNH PRESSURE IN HPA 1020.6 1017.3 1016.5 1015.2 1017.9 1012.6 1009.3 1013.2 1015.8 1020.6 1019.8 1021.7 1016.7 MAX. QNH PRESSURE IN HPA 1029.6 1024.0 1025.3 1020.6 1024.3 1018.4 1013.6 1016.6 1022.0 1030.8 1027.5 1026.5 1030.8 DAY 7 1 3 12 26 1 4 25 13 25 15 9 MIN. QNH PRESSURE IN HPA 1015.0 1005.9 1006.6 1009.4 1013.6 1005.8 1004.1 1010.2 1009.4 1012.1 1010.4 1016.1 1004.1 DAY 1 5 26 16 7 22 16 22 19 12 25 17 MEAN QFF PRESSURE IN HPA 1020.9 1017.0 1013.8 1009.5 1009.6 1001.0 994.3 998.7 1005.3 1014.4 1016.4 1023.9 1010.4 MAX. QFF PRESSURE IN HPA 1030.7 1023.9 1024.1 1016.3 1017.2 1009.7 999.8 1002.6 1013.5 1027.1 1027.4 1029.6 1030.7 DAY 7 13 3 7 26 1 4 20 22 25 27 10 MIN. QFF PRESSURE IN HPA 1014.7 1003.8 1002.3 1003.2 1004.9 991.8 986.9 994.8 998.3 1004.2 1007.8 1019.0 986.9 DAY 11 5 25 16 7 22 16 8 19 12 25 17 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 2002,MAY M.(S & A) STATION JEOPHYSICS TEHRAN (99331) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 44 N LONGITUDE 51 23 E DATA PROCESSING CENTER ELEVATION 1418.6 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.0 6.3 6.6 14.8 22.7 28.2 29.8 30.4 27.9 18.5 11.4 8.4 17.3 MINIMUN AIR TEMPERATURE (C) -0.8 2.5 3.1 9.8 16.5 21.8 23.9 24.3 21.8 12.8 6.7 4.4 12.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 20 29 29 21 0 0 0 101 DAYS WITH MINIMUM TEMP. <=-4 8 0 0 0 0 0 0 0 0 0 0 0 8 DAYS WITH FREEZING MIN.<= 0 19 6 5 0 0 0 0 0 0 0 0 0 30 TEMPERATURE RECORDS LOWEST(C) -6.6 -3.0 -1.4 3.5 12.0 16.4 19.0 20.0 16.6 7.0 0.8 0.6 -6.6 DAY 19 6 1 5 8 28 15 30 24 17 13 3 MAXIMUM AIR TEMPERATURE (C) 4.5 9.2 9.4 18.0 26.0 31.6 33.2 33.6 31.2 21.9 14.1 11.2 20.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 24 31 29 23 0 0 0 111 DAYS WITH MAXIMUM TEMP. <= 0 5 0 0 0 0 0 0 0 0 0 0 0 5 TEMPERATURE RECORDS HIGHEST(C) 10.5 16.0 21.7 23.0 32.5 36.0 35.7 36.2 35.2 25.8 19.5 16.0 36.2 DAY 3 10 31 22 31 4 3 11 17 1 6 28 DIF. BETWEEN (MAX.-MIN.) (C) 5.3 6.7 6.3 8.2 9.5 9.8 9.3 9.3 9.4 9.1 7.4 6.8 8.1 MEAN DAILY TEMP. (MDT) (C) 1.8 5.9 6.2 13.9 21.2 26.7 28.6 28.9 26.5 17.4 10.4 7.8 16.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 45.2 171.0 234.8 246.3 165.1 1.2 0.0 0.0 863.6 HEATING DEG. DAYS(BASE 18 0C) 501.5 352.1 365.3 125.0 1.6 0.0 0.0 0.0 0.0 45.6 226.9 317.0 1935.1 DEWPOINT (MEAN C) -4.8 -1.7 -1.6 -0.0 3.9 1.9 4.4 2.1 -0.2 -0.5 -4.4 -4.9 -0.5 MIXING RATIO (G/KG) 3.23 4.06 4.08 4.68 6.17 5.56 6.24 5.52 4.70 4.45 3.32 3.27 4.61 VAPOUR PRESSURE (HPA) 4.45 5.56 5.58 6.41 8.43 7.58 8.51 7.53 6.42 6.12 4.59 4.50 6.31 SATURATION DEF. (HPA) 2.86 4.33 4.52 11.04 19.97 31.31 33.93 36.60 32.03 15.72 9.26 6.66 17.35 RELATIVE HUMIDITY (MEAN %) 63 61 61 40 33 21 21 18 18 30 35 42 37 RELATIVE HUMIDITY (MAX. %) 75 75 75 56 46 31 28 27 25 44 51 56 49 RELATIVE HUMIDITY (MIN. %) 50 49 49 29 24 15 16 13 13 23 25 31 28 RELATIVE HUMIDITY (MEAN% 03UTC) 68 71 70 52 44 30 27 27 24 43 48 53 46 RELATIVE HUMIDITY (MEAN% 09UTC) 62 59 59 37 31 19 19 17 17 27 30 40 35 RELATIVE HUMIDITY (MEAN% 15UTC) 64 58 62 37 30 17 18 16 17 29 34 40 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 76.6 91.5 182.5 68.5 38.4 15.4 0.4 0.0 0.0 22.4 0.3 15.1 511.1 DAYS WITH PRECIPITATION >=10 2 5 5 2 2 1 0 0 0 2 0 0 19 DAYS WITH PRECIPITATION >= 5 9 5 10 4 3 1 0 0 0 2 0 2 36 DAYS WITH PRECIPITATION >= 1 12 10 13 7 6 2 0 0 0 2 0 2 54 DAYS WITH PRECIPITATION 13 15 19 11 12 3 1 0 0 3 2 4 83 GREATEST DAILY PRECIPITATION 11.0 30.0 60.0 30.0 13.0 14.0 0.4 0.0 0.0 11.0 0.3 9.1 60.0 DAY 19 2 2 3 8