STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. 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OF WIND OBSERVATION **** 140 155 150 155 150 155 155 150 155 150 155 1670 VECTOR WIND DIRECTION (MEAN) *** 238 228 257 239 248 122 133 107 227 208 220 *** VECTOR WIND MAGNITUDE(KNOTS) **** 4.2 3.8 3.3 2.9 1.2 5.2 5.3 3.4 0.8 6.4 4.7 **** WIND STEADINESES (MEAN %) ***** 53.2 53.5 37.1 35.8 13.2 49.1 51.0 45.9 14.0 76.2 59.5 ***** WIND SPEED (MEAN KNOTS) **** 7.9 7.1 8.9 8.1 9.1 10.6 10.4 7.4 5.7 8.4 7.9 **** FASTEST WIND DIRECTION *** 240 180 300 190 220 120 120 30 270 210 240 *** FASTEST WIND SPEED (KNOTS) *** 29 33 29 29 29 29 27 23 23 31 31 *** DAY ** 1 7 23 13 2 18 21 4 14 28 14 DAYS WITH SKY CLEAR (0-2)/8 **** 8 6 10 9 25 29 31 20 12 11 13 **** DAYS WITH P.CLOUDY (3-6)/8 **** 10 16 8 19 5 2 0 8 13 10 12 **** DAYS WITH CLOUDY (7-8)/8 **** 10 9 12 3 0 0 0 2 6 9 6 **** DAYS WITH VISIBILITY =< 2 KM **** 5 1 0 2 0 0 0 0 0 0 4 **** DURATION OF SUNSHINE HOURS ****** ****** ****** 223.6 276.5 369.5 378.8 ****** 286.5 223.0 171.4 150.7 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 ****** 807.2 808.3 810.3 809.9 806.4 804.9 806.3 813.4 814.7 810.2 810.6 ****** MAX. QFE PRESSURE IN HPA ****** 815.1 813.2 816.1 813.9 810.2 808.1 810.6 818.8 819.6 817.6 815.7 ****** DAY ** 18 18 5 17 8 13 15 23 11 2 7 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.5 0.8 6.3 10.2 14.6 19.1 25.9 27.4 20.7 13.0 7.2 -0.7 11.9 MINIMUN AIR TEMPERATURE (C) -5.2 -2.9 0.7 4.8 8.5 11.9 17.3 18.1 12.9 6.5 1.4 -4.8 5.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 5 4 0 0 0 0 9 DAYS WITH MINIMUM TEMP. <=-4 21 9 0 0 0 0 0 0 0 0 6 19 55 DAYS WITH FREEZING MIN.<= 0 30 26 15 1 0 0 0 0 0 0 10 31 113 TEMPERATURE RECORDS LOWEST(C) -11.0 -7.6 -3.8 -1.0 1.4 8.6 11.6 13.4 4.8 0.4 -10.0 -10.0 -11.0 DAY 5 25 27 6 9 1 6 24 22 18 26 21 MAXIMUM AIR TEMPERATURE (C) 1.6 4.7 10.8 14.2 18.8 23.4 31.4 32.5 25.8 17.7 11.6 3.0 16.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 1 24 29 4 0 0 0 58 DAYS WITH MAXIMUM TEMP. <= 0 11 1 0 0 0 0 0 0 0 0 0 11 23 TEMPERATURE RECORDS HIGHEST(C) 7.4 9.8 17.0 20.0 23.8 30.0 36.4 35.2 30.8 25.4 17.8 9.0 36.4 DAY 29 21 24 30 19 21 16 6 8 3 1 31 DIF. BETWEEN (MAX.-MIN.) (C) 6.8 7.6 10.1 9.4 10.3 11.5 14.1 14.4 12.9 11.2 10.2 7.8 10.5 MEAN DAILY TEMP. (MDT) (C) -1.8 0.9 5.7 9.5 13.7 17.6 24.3 25.3 19.3 12.1 6.5 -0.9 11.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 6.4 108.5 134.6 19.1 0.0 0.0 0.0 268.6 HEATING DEG. DAYS(BASE 18 0C) 613.6 478.5 380.2 255.3 134.5 38.1 0.0 0.0 31.5 184.1 345.4 585.0 3046.2 DEWPOINT (MEAN C) -6.3 -4.7 -5.2 0.2 4.4 5.2 8.3 3.1 -1.5 -3.5 -6.4 -8.5 -1.2 MIXING RATIO (G/KG) 3.02 3.42 3.42 5.11 6.66 7.15 8.88 6.32 4.49 3.89 3.21 2.55 4.84 VAPOUR PRESSURE (HPA) 3.92 4.43 4.42 6.59 8.59 9.19 11.34 8.12 5.80 5.06 4.16 3.31 6.24 SATURATION DEF. (HPA) 1.75 2.23 5.46 6.20 8.67 13.73 23.64 29.74 20.02 10.63 6.63 2.74 10.95 RELATIVE HUMIDITY (MEAN %) 72 68 49 56 54 46 36 25 27 38 41 59 48 RELATIVE HUMIDITY (MAX. %) 81 82 70 74 72 69 58 42 44 57 58 72 65 RELATIVE HUMIDITY (MIN. %) 61 53 32 41 40 30 23 15 16 23 27 46 34 RELATIVE HUMIDITY (MEAN% 03UTC) 75 77 66 73 69 65 57 42 42 54 53 69 62 RELATIVE HUMIDITY (MEAN% 09UTC) 70 66 40 47 46 37 30 19 20 31 36 56 42 RELATIVE HUMIDITY (MEAN% 15UTC) 72 67 42 50 53 41 27 19 21 36 39 54 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 25.6 52.4 26.3 86.6 121.2 55.8 0.0 0.0 0.3 11.9 16.2 9.2 405.5 DAYS WITH PRECIPITATION >=10 1 1 0 3 5 2 0 0 0 0 0 0 12 DAYS WITH PRECIPITATION >= 5 2 3 2 5 8 5 0 0 0 1 2 0 28 DAYS WITH PRECIPITATION >= 1 5 9 5 13 14 7 0 0 0 2 3 3 61 DAYS WITH PRECIPITATION 6 11 9 16 15 12 0 0 3 4 5 6 87 GREATEST DAILY PRECIPITATION 10.0 24.0 9.0 24.0 31.0 20.0 0.0 0.0 0.1 7.0 6.0 4.9 31.0 DAY 12 5 17 24 7 3 ** ** 21 25 3 12 DAY WITH THUNDER STORM 0 0 0 4 9 6 0 0 0 0 0 0 19 DAYS WITH SNOW OR SLEET 2 8 3 0 0 0 0 0 0 0 2 6 21 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 225 135 270 225 135 315 135 135 135 225 315 180 135 PREVAILING WIND SPEED(KNOTS) 17.0 9.7 12.2 15.7 8.8 10.0 13.6 14.4 10.3 12.8 13.6 9.1 11.4 PREVAILING WIND PERCENT 10.3 17.1 23.2 23.3 15.5 16.7 29.0 35.5 19.3 19.4 20.7 14.8 15.9 CALMS PERCENT OF WIND 61.9 38.6 30.3 21.3 25.2 27.3 20.0 16.1 24.7 25.8 34.0 48.4 31.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 220 212 242 229 188 289 143 154 201 205 302 178 202 VECTOR WIND MAGNITUDE(KNOTS) 2.6 2.2 5.9 5.5 1.7 2.0 4.6 6.6 3.4 3.7 0.7 2.3 2.7 WIND STEADINESES (MEAN %) 59.1 33.8 68.6 56.7 20.0 26.3 49.5 63.5 43.0 48.1 9.1 51.1 35.1 WIND SPEED (MEAN KNOTS) 4.4 6.5 8.6 9.7 8.5 7.6 9.3 10.4 7.9 7.7 7.7 4.5 7.7 FASTEST WIND DIRECTION 250 240 210 240 270 240 90 120 270 240 150 240 270 FASTEST WIND SPEED (KNOTS) 29 29 31 29 29 35 23 27 37 27 31 21 37 DAY 1 8 25 3 6 28 14 16 20 4 11 22 DAYS WITH SKY CLEAR (0-2)/8 20 12 17 4 11 20 24 30 25 23 22 14 222 DAYS WITH P.CLOUDY (3-6)/8 9 6 5 15 15 10 6 1 5 8 7 10 97 DAYS WITH CLOUDY (7-8)/8 2 10 9 11 5 0 1 0 0 0 1 7 46 DAYS WITH VISIBILITY =< 2 KM 7 4 0 1 0 0 0 0 0 0 0 1 13 DURATION OF SUNSHINE HOURS 178.4 170.3 251.7 209.7 ****** 276.4 348.6 359.4 317.2 289.0 235.1 175.4 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 811.7 809.2 809.1 808.9 812.0 809.0 805.8 808.5 810.8 813.4 811.0 811.0 810.0 MAX. QFE PRESSURE IN HPA 819.4 814.8 817.4 814.0 816.2 813.1 810.6 812.4 817.2 821.3 817.7 815.0 821.3 DAY-HOUR 7- 6 1-15 3- 6 12- 6 23- 6 2- 6 4- 6 25- 6 13- 6 25- 6 16- 6 10- 6 MIN. QFE PRESSURE IN HPA 805.2 798.1 801.6 804.8 806.9 802.8 800.6 804.2 804.9 806.5 803.2 806.5 798.1 DAY-HOUR 11-15 5- 3 17- 3 17-15 6-12 29-15 16-15 8-15 20- 9 12-12 25-12 4-12 MEAN QNH PRESSURE IN HPA 1019.7 1016.7 1016.5 1016.3 1020.0 1016.4 1012.5 1015.8 1018.5 1021.7 1018.8 1018.8 1017.6 MAX. QNH PRESSURE IN HPA 1028.9 1023.4 1026.5 1022.4 1025.0 1021.3 1018.3 1020.5 1026.3 1031.2 1026.9 1023.6 1031.2 DAY-HOUR 7- 6 1-15 3- 6 12- 6 23- 6 2- 6 4- 6 25- 6 13- 6 25- 6 16- 6 10- 6 MIN. QNH PRESSURE IN HPA 1011.8 1003.3 1007.5 1011.3 1013.9 1008.9 1006.3 1010.6 1011.5 1013.4 1009.4 1013.4 1003.3 DAY-HOUR 11-15 5- 3 17- 3 17-15 6-12 29-15 16-15 8-15 20- 9 12-12 25-12 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 811.5 809.1 809.1 809.1 812.1 809.4 806.4 809.2 811.2 813.5 811.1 810.9 810.2 MAX. QFE PRESSURE IN HPA 818.6 813.7 816.2 813.1 815.7 812.6 810.4 812.2 816.4 820.2 816.9 814.3 820.2 DAY 7 1 3 13 23 1 4 25 13 25 16 10 MIN. QFE PRESSURE IN HPA 805.8 798.1 801.6 805.2 808.0 805.2 803.0 806.8 805.7 808.2 805.2 807.1 798.1 DAY 17 5 17 19 2 29 16 8 20 12 24 4 MEAN QNH PRESSURE IN HPA 1019.4 1016.5 1016.5 1016.5 1020.1 1016.9 1013.2 1016.6 1019.0 1021.9 1018.9 1018.7 1017.8 MAX. QNH PRESSURE IN HPA 1027.9 1022.0 1025.0 1021.3 1024.4 1020.7 1018.1 1020.2 1025.3 1029.9 1025.9 1022.8 1029.9 DAY 7 1 3 13 23 1 4 25 13 25 16 10 MIN. QNH PRESSURE IN HPA 1012.5 1003.3 1007.5 1011.8 1015.2 1011.8 1009.2 1013.7 1012.4 1015.4 1011.8 1014.1 1003.3 DAY 17 5 17 19 2 29 16 8 20 12 24 4 MEAN QFF PRESSURE IN HPA 1023.5 1018.8 1014.9 1011.4 1011.8 1005.2 996.4 999.1 1006.6 1015.7 1016.7 1022.8 1011.9 MAX. QFF PRESSURE IN HPA 1038.4 1025.9 1024.8 1018.4 1016.3 1012.6 1002.9 1005.0 1018.5 1027.3 1026.6 1030.0 1038.4 DAY 7 25 3 7 9 8 4 25 22 25 27 20 MIN. QFF PRESSURE IN HPA 1011.5 1002.3 1004.4 1003.5 1007.8 996.5 990.1 994.2 999.5 1004.2 1006.1 1014.9 990.1 DAY 17 5 17 19 11 22 16 8 20 4 24 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 812.4 810.0 810.0 809.7 812.6 809.7 806.7 809.6 811.8 814.4 812.0 811.7 810.9 MAX. QFE PRESSURE IN HPA 819.4 814.8 817.4 814.0 816.2 813.1 810.6 812.4 817.2 821.3 817.7 815.0 821.3 DAY 7 13 3 12 23 2 4 25 13 25 16 10 MIN. QFE PRESSURE IN HPA 806.3 799.5 803.0 806.3 808.4 805.1 803.1 806.9 806.0 809.0 805.4 807.8 799.5 DAY 11 5 26 18 2 29 16 8 20 12 24 4 MEAN QNH PRESSURE IN HPA 1020.5 1017.5 1017.6 1017.2 1020.7 1017.2 1013.6 1017.1 1019.7 1022.9 1019.9 1019.6 1018.6 MAX. QNH PRESSURE IN HPA 1028.9 1023.4 1026.5 1022.4 1025.0 1021.3 1018.3 1020.5 1026.3 1031.2 1026.9 1023.6 1031.2 DAY 7 13 3 12 23 2 4 25 13 25 16 10 MIN. QNH PRESSURE IN HPA 1013.1 1005.0 1009.2 1013.1 1015.7 1011.7 1009.3 1013.9 1012.8 1016.4 1012.1 1014.9 1005.0 DAY 11 5 26 18 2 29 16 8 20 12 24 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 812.1 809.7 809.5 809.2 812.2 809.3 806.1 809.0 811.1 813.7 811.1 811.2 810.3 MAX. QFE PRESSURE IN HPA 818.6 814.6 816.9 813.7 815.8 812.5 810.0 811.6 816.2 820.7 817.0 814.6 820.7 DAY 7 1 3 12 26 1 4 25 13 25 15 10 MIN. QFE PRESSURE IN HPA 806.0 798.8 802.1 805.6 808.2 804.3 802.6 805.9 804.9 808.1 804.9 807.3 798.8 DAY 11 5 26 19 2 29 16 8 20 12 25 4 MEAN QNH PRESSURE IN HPA 1020.1 1017.2 1017.0 1016.6 1020.2 1016.7 1012.9 1016.3 1018.9 1022.0 1018.9 1019.0 1018.0 MAX. QNH PRESSURE IN HPA 1027.9 1023.1 1025.9 1022.0 1024.6 1020.6 1017.6 1019.5 1025.0 1030.5 1026.0 1023.1 1030.5 DAY 7 1 3 12 26 1 4 25 13 25 15 10 MIN. QNH PRESSURE IN HPA 1012.8 1004.1 1008.1 1012.3 1015.4 1010.7 1008.7 1012.7 1011.5 1015.3 1011.5 1014.3 1004.1 DAY 11 5 26 19 2 29 16 8 20 12 25 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 811.3 808.6 808.4 808.4 811.5 808.5 805.1 807.8 810.0 812.6 810.3 810.3 809.4 MAX. QFE PRESSURE IN HPA 817.6 814.4 815.5 812.7 814.8 812.3 808.8 810.4 814.8 819.9 816.5 813.9 819.9 DAY 7 1 3 13 22 1 4 24 13 25 15 10 MIN. QFE PRESSURE IN HPA 805.8 799.3 801.8 805.0 806.9 803.0 802.0 804.7 805.6 806.5 803.2 806.5 799.3 DAY 11 5 26 17 6 29 16 8 19 12 25 4 MEAN QNH PRESSURE IN HPA 1019.1 1015.9 1015.7 1015.6 1019.4 1015.8 1011.7 1014.9 1017.6 1020.8 1018.0 1018.0 1016.9 MAX. QNH PRESSURE IN HPA 1026.7 1022.9 1024.2 1020.8 1023.4 1020.4 1016.1 1018.1 1023.4 1029.5 1025.4 1022.3 1029.5 DAY 7 1 3 13 22 1 4 24 13 25 15 10 MIN. QNH PRESSURE IN HPA 1012.5 1004.7 1007.7 1011.6 1013.9 1009.2 1008.0 1011.2 1012.3 1013.4 1009.4 1013.4 1004.7 DAY 11 5 26 17 6 29 16 8 19 12 25 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 KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 811.4 808.9 808.5 808.3 811.5 808.3 804.8 807.3 809.9 812.9 810.8 810.7 809.4 MAX. QFE PRESSURE IN HPA 818.0 814.8 815.2 813.1 814.7 812.6 808.3 810.4 814.8 820.3 817.1 814.1 820.3 DAY 6 1 3 12 22 7 3 24 12 26 15 10 MIN. QFE PRESSURE IN HPA 805.2 800.8 802.0 804.8 807.8 802.8 800.6 804.2 805.4 808.9 803.8 807.5 800.6 DAY 11 5 26 17 2 29 16 8 19 12 25 4 MEAN QNH PRESSURE IN HPA 1019.2 1016.2 1015.8 1015.5 1019.4 1015.6 1011.3 1014.4 1017.5 1021.1 1018.5 1018.5 1016.9 MAX. QNH PRESSURE IN HPA 1027.2 1023.4 1023.8 1021.3 1023.2 1020.7 1015.5 1018.1 1023.4 1030.0 1026.1 1022.5 1030.0 DAY 6 1 3 12 22 7 3 24 12 26 15 10 MIN. QNH PRESSURE IN HPA 1011.8 1006.5 1008.0 1011.3 1014.9 1008.9 1006.3 1010.6 1012.1 1016.3 1010.1 1014.6 1006.3 DAY 11 5 26 17 2 29 16 8 19 12 25 4 MEAN QFF PRESSURE IN HPA 1023.2 1018.5 1014.0 1010.3 1011.0 1003.8 994.5 997.0 1005.2 1015.0 1016.5 1022.5 1011.0 MAX. QFF PRESSURE IN HPA 1037.4 1024.4 1023.9 1018.3 1016.2 1013.1 1001.1 1003.6 1016.8 1026.9 1025.6 1028.2 1037.4 DAY 7 25 3 12 13 7 3 24 21 26 27 19 MIN. QFF PRESSURE IN HPA 1010.8 1005.9 1003.0 1003.5 1005.5 992.9 986.8 991.8 997.2 1004.9 1008.1 1015.0 986.8 DAY 16 5 25 18 2 29 16 8 4 3 7 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 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.9 0.1 1.6 8.4 16.8 21.2 24.7 25.6 21.5 13.0 6.2 4.1 11.6 MINIMUN AIR TEMPERATURE (C) -7.3 -3.5 -2.0 3.2 10.1 12.4 17.1 17.1 13.1 7.0 1.1 0.0 5.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 4 0 0 0 0 7 DAYS WITH MINIMUM TEMP. <=-4 22 12 6 1 0 0 0 0 0 0 3 1 45 DAYS WITH FREEZING MIN.<= 0 27 25 27 5 0 0 0 0 0 0 10 17 111 TEMPERATURE RECORDS LOWEST(C) -16.8 -14.4 -10.0 -5.0 5.6 6.4 10.4 12.4 8.8 0.2 -5.6 -4.0 -16.8 DAY 16 4 1 4 5 8 15 15 21 31 12 3 MAXIMUM AIR TEMPERATURE (C) -0.5 3.6 4.8 12.8 21.4 26.1 29.3 31.0 27.1 17.8 10.7 7.5 16.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 1 12 23 2 0 0 0 38 DAYS WITH MAXIMUM TEMP. <= 0 18 4 1 1 0 0 0 0 0 0 0 0 24 TEMPERATURE RECORDS HIGHEST(C) 8.8 11.0 15.0 19.5 25.6 30.2 32.2 34.0 30.4 23.8 16.4 13.4 34.0 DAY 2 25 30 21 31 4 19 11 15 3 2 5 DIF. BETWEEN (MAX.-MIN.) (C) 6.8 7.1 6.8 9.6 11.3 13.7 12.2 13.9 14.0 10.8 9.6 7.5 10.3 MEAN DAILY TEMP. (MDT) (C) -3.9 0.1 1.4 8.0 15.8 19.2 23.2 24.0 20.1 12.4 5.9 3.8 10.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.2 11.7 73.0 96.6 12.8 0.0 0.0 0.0 194.3 HEATING DEG. DAYS(BASE 18 0C) 679.3 519.5 494.8 300.3 78.7 16.2 0.1 0.0 12.3 173.1 362.3 441.4 3077.9 DEWPOINT (MEAN C) -8.5 -4.4 -3.4 -0.5 8.2 6.6 4.4 1.9 -3.6 -2.7 -5.2 -5.7 -1.1 MIXING RATIO (G/KG) 2.59 3.50 3.82 4.73 8.57 8.04 6.68 5.73 3.94 4.10 3.35 3.21 4.85 VAPOUR PRESSURE (HPA) 3.35 4.51 4.91 6.10 11.01 10.30 8.59 7.38 5.09 5.31 4.36 4.16 6.26 SATURATION DEF. (HPA) 1.57 1.89 2.20 5.49 8.80 15.81 23.33 26.57 21.65 10.39 5.50 4.21 10.62 RELATIVE HUMIDITY (MEAN %) 72 74 72 58 59 43 29 25 23 39 47 53 50 RELATIVE HUMIDITY (MAX. %) 82 84 85 78 76 62 45 39 40 56 66 70 65 RELATIVE HUMIDITY (MIN. %) 61 63 58 42 47 31 19 16 11 25 31 37 37 RELATIVE HUMIDITY (MEAN% 03UTC) 78 80 80 71 75 61 45 39 40 55 62 64 63 RELATIVE HUMIDITY (MEAN% 09UTC) 69 70 69 51 52 37 23 20 16 35 41 45 44 RELATIVE HUMIDITY (MEAN% 15UTC) 69 74 70 56 56 36 25 19 16 35 45 51 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 41.4 80.0 87.0 138.7 45.0 16.0 1.8 2.1 2.0 18.7 3.1 11.3 447.1 DAYS WITH PRECIPITATION >=10 2 3 2 5 2 1 0 0 0 0 0 0 15 DAYS WITH PRECIPITATION >= 5 2 6 7 7 4 1 0 0 0 2 0 1 30 DAYS WITH PRECIPITATION >= 1 10 11 14 12 5 2 1 1 1 3 2 3 65 DAYS WITH PRECIPITATION 12 17 20 21 11 2 3 2 2 6 3 8 107 GREATEST DAILY PRECIPITATION 14.0 25.0 18.0 42.0 18.0 13.0 1.0 2.0 2.0 9.0 2.0 5.0 42.0 DAY 6 2 2 13 21 28 10 31 22 13 8 11 DAY WITH THUNDER STORM 1 1 0 3 6 1 3 2 0 1 1 0 19 DAYS WITH SNOW OR SLEET 10 10 14 2 0 0 0 0 0 0 2 4 42 DAYS WITH DUST 1 1 0 0 1 0 0 0 1 0 0 0 4 WIND DIRECTION (PREVAILING) 135 135 135 225 225 135 135 135 225 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 11.1 8.6 9.6 14.0 10.3 9.3 10.9 11.5 11.3 9.9 7.3 10.2 10.0 PREVAILING WIND PERCENT 20.6 17.2 23.9 23.3 17.4 14.7 30.3 27.7 18.0 19.4 22.0 32.9 18.2 CALMS PERCENT OF WIND 36.1 30.3 17.4 15.3 24.5 21.3 9.7 17.4 30.0 21.3 32.7 23.2 23.2 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 170 190 186 216 226 186 114 144 242 219 183 194 186 VECTOR WIND MAGNITUDE(KNOTS) 4.0 3.1 3.8 5.2 3.4 2.5 6.0 5.1 3.8 3.2 1.6 5.1 3.1 WIND STEADINESES (MEAN %) 61.5 44.9 44.2 52.5 46.6 29.8 61.2 55.4 61.3 44.4 34.0 63.7 40.3 WIND SPEED (MEAN KNOTS) 6.5 6.9 8.6 9.9 7.3 8.4 9.8 9.2 6.2 7.2 4.7 8.0 7.7 FASTEST WIND DIRECTION 210 190 220 240 240 210 110 120 220 240 30 220 210 FASTEST WIND SPEED (KNOTS) 27 29 33 33 25 37 19 21 19 21 17 29 37 DAY 6 1 26 10 20 27 1 12 17 27 11 27 DAYS WITH SKY CLEAR (0-2)/8 9 10 6 4 12 26 20 28 27 22 16 10 190 DAYS WITH P.CLOUDY (3-6)/8 12 10 14 14 14 4 11 3 2 8 11 12 115 DAYS WITH CLOUDY (7-8)/8 10 9 11 12 5 0 0 0 1 1 3 9 61 DAYS WITH VISIBILITY =< 2 KM 8 3 5 2 1 0 0 0 0 0 0 0 19 DURATION OF SUNSHINE HOURS 116.0 146.9 156.1 195.7 282.5 360.7 330.8 363.6 318.6 262.2 208.7 150.9 2892.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 809.4 807.3 805.6 808.7 810.4 808.2 809.4 809.1 809.4 812.2 814.0 811.8 809.6 MAX. QFE PRESSURE IN HPA 816.7 813.2 811.3 813.3 814.9 811.9 814.8 816.1 816.3 819.6 821.7 817.6 821.7 DAY-HOUR 26- 6 8- 9 29- 6 4- 9 18- 6 12- 3 3- 6 29- 6 25- 6 2- 6 18- 6 4- 9 MIN. QFE PRESSURE IN HPA 801.5 799.2 800.1 800.9 806.1 803.4 802.0 803.5 802.4 805.2 808.9 805.2 799.2 DAY-HOUR 6-12 5- 6 7-15 13- 3 29-12 19-12 6-15 7-15 21-15 27- 3 28-12 29-12 MEAN QNH PRESSURE IN HPA 1016.9 1014.3 1012.3 1016.1 1018.1 1015.4 1016.9 1016.5 1016.9 1020.2 1022.4 1019.7 1017.2 MAX. QNH PRESSURE IN HPA 1025.7 1021.4 1019.2 1021.6 1023.5 1019.9 1023.4 1024.9 1025.2 1029.1 1031.7 1026.7 1031.7 DAY-HOUR 26- 6 8- 9 29- 6 4- 9 18- 6 12- 3 3- 6 29- 6 25- 6 2- 6 18- 6 4- 9 MIN. QNH PRESSURE IN HPA 1007.4 1004.6 1005.7 1006.6 1012.9 1009.6 1008.0 1009.8 1008.4 1011.8 1016.3 1011.8 1004.6 DAY-HOUR 6-12 5- 6 7-15 13- 3 29-12 19-12 6-15 7-15 21-15 27- 3 28-12 29-12 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 809.2 807.0 805.4 808.7 810.6 808.8 809.8 809.6 809.8 812.4 814.1 811.8 809.8 MAX. QFE PRESSURE IN HPA 815.6 812.3 810.4 812.3 813.9 811.9 814.6 815.3 815.3 819.2 820.8 816.1 820.8 DAY 26 24 29 4 18 12 4 29 26 2 18 8 MIN. QFE PRESSURE IN HPA 802.0 799.5 801.0 800.9 806.5 803.9 803.8 804.5 802.8 805.2 809.9 807.3 799.5 DAY 19 5 2 13 29 19 7 8 22 27 29 25 MEAN QNH PRESSURE IN HPA 1016.6 1013.9 1012.1 1016.0 1018.3 1016.1 1017.4 1017.1 1017.3 1020.5 1022.5 1019.7 1017.3 MAX. QNH PRESSURE IN HPA 1024.3 1020.4 1018.1 1020.4 1022.3 1019.9 1023.1 1024.0 1024.0 1028.7 1030.6 1024.9 1030.6 DAY 26 24 29 4 18 12 4 29 26 2 18 8 MIN. QNH PRESSURE IN HPA 1008.0 1005.0 1006.8 1006.6 1013.4 1010.2 1010.1 1011.0 1008.9 1011.8 1017.5 1014.3 1005.0 DAY 19 5 2 13 29 19 7 8 22 27 29 25 MEAN QFF PRESSURE IN HPA 1022.9 1016.4 1013.6 1012.3 1008.2 1002.8 1001.8 1001.0 1004.3 1013.6 1021.3 1019.6 1011.5 MAX. QFF PRESSURE IN HPA 1035.7 1026.0 1020.9 1025.6 1013.4 1011.4 1008.4 1011.1 1012.6 1024.5 1033.9 1026.4 1035.7 DAY 26 4 29 4 5 12 9 29 25 19 18 3 MIN. QFF PRESSURE IN HPA 1010.5 1006.1 1005.3 1000.0 1001.5 994.3 995.6 993.8 997.6 1002.9 1011.7 1012.4 993.8 DAY 6 10 25 13 25 19 6 8 22 27 7 29 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 810.0 808.0 806.2 809.5 811.2 809.1 810.3 810.1 810.5 813.2 814.9 812.6 810.5 MAX. QFE PRESSURE IN HPA 816.7 813.1 811.3 813.1 814.9 811.9 814.8 816.1 816.3 819.6 821.7 817.1 821.7 DAY 26 8 29 4 18 12 3 29 25 2 18 4 MIN. QFE PRESSURE IN HPA 803.0 799.2 802.0 802.9 806.9 804.3 804.4 805.3 804.8 805.7 810.6 808.1 799.2 DAY 19 5 2 13 29 19 7 8 21 27 29 14 MEAN QNH PRESSURE IN HPA 1017.6 1015.1 1013.0 1016.9 1019.0 1016.5 1018.0 1017.8 1018.1 1021.4 1023.5 1020.7 1018.1 MAX. QNH PRESSURE IN HPA 1025.7 1021.3 1019.2 1021.3 1023.5 1019.9 1023.4 1024.9 1025.2 1029.1 1031.7 1026.1 1031.7 DAY 26 8 29 4 18 12 3 29 25 2 18 4 MIN. QNH PRESSURE IN HPA 1009.2 1004.6 1008.0 1009.0 1013.9 1010.7 1010.8 1011.9 1011.3 1012.4 1018.3 1015.3 1004.6 DAY 19 5 2 13 29 19 7 8 21 27 29 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 809.7 807.8 805.9 809.1 810.8 808.5 809.8 809.5 809.7 812.4 814.1 812.0 809.9 MAX. QFE PRESSURE IN HPA 816.0 813.2 810.5 813.3 814.3 811.7 814.8 815.3 815.5 818.2 820.9 817.6 820.9 DAY 26 8 29 4 18 12 3 29 25 2 18 4 MIN. QFE PRESSURE IN HPA 802.3 799.2 801.1 803.2 806.8 804.2 803.8 804.8 803.9 805.2 810.1 806.6 799.2 DAY 6 5 26 13 29 19 6 8 21 27 28 29 MEAN QNH PRESSURE IN HPA 1017.3 1014.9 1012.7 1016.5 1018.6 1015.8 1017.3 1016.9 1017.3 1020.5 1022.6 1020.0 1017.5 MAX. QNH PRESSURE IN HPA 1024.8 1021.4 1018.2 1021.6 1022.8 1019.6 1023.4 1024.0 1024.2 1027.5 1030.7 1026.7 1030.7 DAY 26 8 29 4 18 12 3 29 25 2 18 4 MIN. QNH PRESSURE IN HPA 1008.3 1004.6 1006.9 1009.4 1013.7 1010.6 1010.1 1011.3 1010.2 1011.8 1017.7 1013.5 1004.6 DAY 6 5 26 13 29 19 6 8 21 27 28 29 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 808.9 806.8 805.3 808.3 810.0 807.5 808.7 808.4 808.7 811.4 813.3 811.2 809.0 MAX. QFE PRESSURE IN HPA 814.9 812.2 809.3 812.5 814.0 810.6 813.8 814.3 815.0 817.3 819.1 816.0 819.1 DAY 26 8 31 4 18 12 3 29 25 1 15 7 MIN. QFE PRESSURE IN HPA 801.5 799.4 800.9 802.3 806.1 803.4 802.1 804.0 802.8 805.2 808.9 805.2 799.4 DAY 6 5 7 12 29 19 6 7 21 27 28 29 MEAN QNH PRESSURE IN HPA 1016.3 1013.7 1011.9 1015.5 1017.5 1014.6 1016.1 1015.6 1016.0 1019.3 1021.5 1019.0 1016.4 MAX. QNH PRESSURE IN HPA 1023.5 1020.2 1016.7 1020.6 1022.4 1018.3 1022.2 1022.8 1023.6 1026.4 1028.5 1024.8 1028.5 DAY 26 8 31 4 18 12 3 29 25 1 15 7 MIN. QNH PRESSURE IN HPA 1007.4 1004.8 1006.6 1008.3 1012.9 1009.6 1008.1 1010.4 1008.9 1011.8 1016.3 1011.8 1004.8 DAY 6 5 7 12 29 19 6 7 21 27 28 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 809.3 807.0 805.4 808.3 809.8 807.2 808.6 808.1 808.5 811.6 813.6 811.5 809.1 MAX. QFE PRESSURE IN HPA 814.9 811.8 809.7 812.6 813.4 810.6 813.6 813.9 815.0 817.8 820.2 816.5 820.2 DAY 26 23 28 4 17 12 3 29 25 1 15 7 MIN. QFE PRESSURE IN HPA 802.0 800.2 800.1 803.0 806.1 803.4 802.0 803.5 802.4 806.5 809.3 806.1 800.1 DAY 6 5 7 12 29 19 6 7 21 27 28 29 MEAN QNH PRESSURE IN HPA 1016.7 1014.0 1012.1 1015.5 1017.3 1014.2 1015.9 1015.3 1015.8 1019.5 1022.0 1019.4 1016.5 MAX. QNH PRESSURE IN HPA 1023.5 1019.8 1017.2 1020.7 1021.7 1018.3 1021.9 1022.3 1023.6 1027.0 1029.9 1025.4 1029.9 DAY 26 23 28 4 17 12 3 29 25 1 15 7 MIN. QNH PRESSURE IN HPA 1008.0 1005.8 1005.7 1009.2 1012.9 1009.6 1008.0 1009.8 1008.4 1013.4 1016.7 1012.9 1005.7 DAY 6 5 7 12 29 19 6 7 21 27 28 29 MEAN QFF PRESSURE IN HPA 1023.0 1016.5 1013.3 1011.6 1006.9 1000.7 1000.3 999.3 1003.0 1012.8 1020.9 1019.2 1010.6 MAX. QFF PRESSURE IN HPA 1035.0 1025.5 1019.6 1025.9 1012.3 1009.0 1005.5 1009.8 1011.5 1023.5 1033.0 1026.2 1035.0 DAY 26 3 5 4 12 12 3 29 25 18 18 7 MIN. QFF PRESSURE IN HPA 1008.3 1004.6 1005.4 1002.9 998.9 993.6 993.4 992.6 997.2 1004.4 1011.9 1008.6 992.6 DAY 6 9 25 12 29 19 6 7 8 26 7 29 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 KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.6 -2.2 1.3 9.8 15.6 22.5 26.0 27.8 19.7 14.9 5.5 0.8 11.8 MINIMUN AIR TEMPERATURE (C) -5.4 -7.6 -3.2 3.3 8.4 14.3 17.1 19.1 12.0 7.9 1.6 -2.8 5.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 8 0 0 0 0 10 DAYS WITH MINIMUM TEMP. <=-4 19 19 10 4 0 0 0 0 0 0 0 9 61 DAYS WITH FREEZING MIN.<= 0 27 27 28 7 0 0 0 0 0 0 8 25 122 TEMPERATURE RECORDS LOWEST(C) -18.4 -17.0 -11.2 -5.6 1.2 9.0 11.6 14.0 4.2 3.4 -2.6 -11.4 -18.4 DAY 29 1 8 11 6 3 7 21 15 24 29 22 MAXIMUM AIR TEMPERATURE (C) 3.7 2.1 5.2 14.0 20.5 27.3 31.7 33.3 24.9 19.5 9.1 4.3 16.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 5 23 31 0 0 0 0 59 DAYS WITH MAXIMUM TEMP. <= 0 5 8 2 1 0 0 0 0 0 0 0 1 17 TEMPERATURE RECORDS HIGHEST(C) 11.0 10.0 12.4 26.0 26.4 30.6 37.0 36.2 29.4 24.4 12.6 11.6 37.0 DAY 6 18 22 27 27 28 29 17 1 2 17 8 DIF. BETWEEN (MAX.-MIN.) (C) 9.1 9.7 8.4 10.7 12.1 13.0 14.6 14.2 12.9 11.6 7.5 7.1 10.9 MEAN DAILY TEMP. (MDT) (C) -0.9 -2.7 1.0 8.7 14.4 20.8 24.4 26.2 18.4 13.7 5.4 0.7 10.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.2 30.2 110.5 162.4 4.7 0.0 0.0 0.0 308.0 HEATING DEG. DAYS(BASE 18 0C) 584.5 580.2 527.7 281.8 120.4 4.0 0.0 0.0 27.3 134.1 379.3 535.4 3174.6 DEWPOINT (MEAN C) -7.9 -8.5 -4.9 -3.8 0.7 0.9 4.2 -0.1 -3.0 -1.9 -1.0 -4.0 -2.4 MIXING RATIO (G/KG) 2.76 2.67 3.43 3.78 5.19 5.28 6.80 5.07 4.04 4.30 4.48 3.61 4.28 VAPOUR PRESSURE (HPA) 3.57 3.45 4.41 4.87 6.70 6.80 8.71 6.52 5.24 5.57 5.81 4.66 5.53 SATURATION DEF. (HPA) 2.66 2.08 2.54 8.35 11.76 21.24 26.58 32.15 18.72 12.07 3.40 1.99 11.96 RELATIVE HUMIDITY (MEAN %) 61 64 67 44 41 27 29 19 26 36 65 72 46 RELATIVE HUMIDITY (MAX. %) 75 78 82 64 60 46 48 33 44 54 79 85 62 RELATIVE HUMIDITY (MIN. %) 47 52 52 31 27 16 17 12 14 23 52 59 34 RELATIVE HUMIDITY (MEAN% 03UTC) 69 73 77 61 56 44 48 33 44 52 72 82 59 RELATIVE HUMIDITY (MEAN% 09UTC) 57 60 63 38 32 20 22 13 21 29 60 67 40 RELATIVE HUMIDITY (MEAN% 15UTC) 62 63 63 36 40 23 23 16 18 33 68 71 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.1 18.0 63.0 67.1 57.2 8.4 2.3 0.0 0.0 14.2 50.9 44.2 357.4 DAYS WITH PRECIPITATION >=10 1 0 2 2 1 0 0 0 0 1 2 2 11 DAYS WITH PRECIPITATION >= 5 1 2 5 4 5 0 0 0 0 1 4 3 25 DAYS WITH PRECIPITATION >= 1 3 4 14 6 10 5 1 0 0 1 7 6 57 DAYS WITH PRECIPITATION 6 10 19 10 18 8 4 0 1 5 10 8 99 GREATEST DAILY PRECIPITATION 26.0 8.0 15.0 31.0 19.0 2.0 2.0 0.0 0.0 13.0 21.0 15.0 31.0 DAY 16 19 29 5 17 7 5 ** ** 21 3 1 DAY WITH THUNDER STORM 0 0 1 1 13 4 3 0 1 0 2 0 25 DAYS WITH SNOW OR SLEET 3 6 13 3 0 0 0 0 0 0 2 7 34 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 1 0 0 1 WIND DIRECTION (PREVAILING) 270 225 225 225 180 180 135 135 270 225 135 135 225 PREVAILING WIND SPEED(KNOTS) 12.7 11.4 16.6 14.0 11.1 12.2 10.3 13.9 12.4 12.8 9.0 8.9 13.4 PREVAILING WIND PERCENT 13.5 16.4 25.2 30.0 14.8 19.3 20.0 39.4 18.0 21.9 16.0 11.6 15.6 CALMS PERCENT OF WIND 38.1 45.0 24.5 18.0 21.9 21.3 17.4 6.5 20.0 43.9 39.3 53.5 29.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 237 204 214 242 229 204 145 144 225 250 190 196 206 VECTOR WIND MAGNITUDE(KNOTS) 2.8 3.4 6.0 6.6 2.8 4.1 2.8 9.1 4.0 4.7 2.8 2.2 3.5 WIND STEADINESES (MEAN %) 44.4 59.6 63.8 68.0 31.8 42.7 32.6 75.8 43.5 75.8 50.9 47.8 43.8 WIND SPEED (MEAN KNOTS) 6.3 5.7 9.4 9.7 8.8 9.6 8.6 12.0 9.2 6.2 5.5 4.6 8.0 FASTEST WIND DIRECTION 240 210 240 210 240 230 90 120 270 240 210 210 210 FASTEST WIND SPEED (KNOTS) 27 33 33 35 31 23 21 27 23 25 23 23 35 DAY 26 22 23 9 4 12 4 19 2 6 4 8 DAYS WITH SKY CLEAR (0-2)/8 16 21 6 8 11 18 26 26 28 19 8 6 193 DAYS WITH P.CLOUDY (3-6)/8 10 6 15 15 17 11 5 5 2 9 14 18 127 DAYS WITH CLOUDY (7-8)/8 5 1 10 7 3 1 0 0 0 3 8 7 45 DAYS WITH VISIBILITY =< 2 KM 2 2 3 0 0 0 0 0 0 0 1 5 13 DURATION OF SUNSHINE HOURS 197.2 227.4 175.3 247.7 281.2 329.6 373.6 336.4 329.5 263.7 150.7 146.6 3058.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 808.1 808.0 804.7 807.5 810.6 807.8 805.7 807.8 811.3 812.9 812.3 809.5 808.8 MAX. QFE PRESSURE IN HPA 814.5 814.9 815.9 813.8 815.5 812.7 810.8 811.8 816.5 818.3 821.4 816.4 821.4 DAY-HOUR 12- 9 17- 6 11- 6 24- 6 12- 6 8- 6 19- 6 21- 6 19- 6 9- 6 8- 6 28- 6 MIN. QFE PRESSURE IN HPA 798.1 800.0 796.4 798.0 801.0 801.0 800.8 802.0 805.4 808.2 808.8 801.4 796.4 DAY-HOUR 16- 3 5-12 29-12 9-15 4-12 24-15 11-15 5-15 2-15 6-12 19-12 9-12 MEAN QNH PRESSURE IN HPA 1015.3 1015.2 1011.2 1014.5 1018.3 1015.0 1012.4 1014.9 1019.1 1021.1 1020.3 1017.0 1016.2 MAX. QNH PRESSURE IN HPA 1023.0 1023.5 1024.7 1022.2 1024.2 1020.8 1018.6 1019.8 1025.4 1027.6 1031.3 1025.3 1031.3 DAY-HOUR 12- 9 17- 6 11- 6 24- 6 12- 6 8- 6 19- 6 21- 6 19- 6 9- 6 8- 6 28- 6 MIN. QNH PRESSURE IN HPA 1003.3 1005.6 1001.2 1003.1 1006.8 1006.8 1006.5 1008.0 1012.1 1015.4 1016.1 1007.2 1001.2 DAY-HOUR 16- 3 5-12 29-12 9-15 4-12 24-15 11-15 5-15 2-15 6-12 19-12 9-12 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 808.0 807.9 804.7 807.7 810.9 808.3 806.4 808.4 811.7 813.1 812.3 809.3 809.1 MAX. QFE PRESSURE IN HPA 813.5 814.0 814.8 813.1 815.2 812.3 810.1 811.1 815.6 817.1 820.2 814.6 820.2 DAY 12 17 11 23 12 8 19 25 19 9 8 28 MIN. QFE PRESSURE IN HPA 798.1 802.5 798.1 800.1 802.8 803.4 803.2 803.9 807.6 810.3 809.1 801.7 798.1 DAY 16 5 7 5 5 30 11 5 3 2 20 10 MEAN QNH PRESSURE IN HPA 1015.2 1015.1 1011.2 1014.8 1018.6 1015.5 1013.2 1015.7 1019.7 1021.3 1020.3 1016.8 1016.5 MAX. QNH PRESSURE IN HPA 1021.8 1022.4 1023.4 1021.3 1023.8 1020.4 1017.7 1018.9 1024.3 1026.1 1029.9 1023.1 1029.9 DAY 12 17 11 23 12 8 19 25 19 9 8 28 MIN. QNH PRESSURE IN HPA 1003.3 1008.6 1003.3 1005.7 1008.9 1009.6 1009.4 1010.2 1014.7 1017.9 1016.5 1007.6 1003.3 DAY 16 5 7 5 5 30 11 5 3 2 20 10 MEAN QFF PRESSURE IN HPA 1018.8 1020.7 1013.1 1010.2 1009.9 1001.5 996.6 998.2 1007.9 1013.3 1019.1 1019.1 1010.7 MAX. QFF PRESSURE IN HPA 1030.0 1034.0 1026.3 1022.3 1016.6 1007.8 1002.6 1003.9 1017.7 1019.0 1028.9 1031.3 1034.0 DAY 29 7 11 13 6 1 8 21 15 29 8 28 MIN. QFF PRESSURE IN HPA 1003.5 1010.4 1002.1 1002.6 1001.2 993.7 990.0 990.4 1000.3 1006.4 1013.3 1006.8 990.0 DAY 16 22 7 28 4 30 11 5 2 2 20 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 808.8 808.8 805.5 808.3 811.3 808.6 806.6 809.0 812.3 813.8 813.0 810.3 809.7 MAX. QFE PRESSURE IN HPA 814.1 814.9 815.9 813.8 815.5 812.7 810.8 811.8 816.5 818.3 821.4 816.4 821.4 DAY 12 17 11 24 12 8 19 21 19 9 8 28 MIN. QFE PRESSURE IN HPA 799.4 802.0 797.6 799.9 803.4 803.6 803.2 804.2 808.1 810.7 810.0 802.4 797.6 DAY 16 5 7 10 4 24 11 5 3 2 20 10 MEAN QNH PRESSURE IN HPA 1016.2 1016.1 1012.1 1015.5 1019.1 1015.9 1013.5 1016.3 1020.3 1022.2 1021.2 1017.9 1017.2 MAX. QNH PRESSURE IN HPA 1022.5 1023.5 1024.7 1022.2 1024.2 1020.8 1018.6 1019.8 1025.4 1027.6 1031.3 1025.3 1031.3 DAY 12 17 11 24 12 8 19 21 19 9 8 28 MIN. QNH PRESSURE IN HPA 1004.8 1008.0 1002.7 1005.4 1009.6 1009.9 1009.4 1010.6 1015.3 1018.4 1017.6 1008.4 1002.7 DAY 16 5 7 10 4 24 11 5 3 2 20 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 808.3 808.4 805.0 807.8 810.8 808.2 805.9 808.0 811.6 813.1 812.4 809.5 809.1 MAX. QFE PRESSURE IN HPA 814.5 814.0 814.8 813.4 815.0 812.4 809.9 810.6 815.5 817.8 820.6 815.4 820.6 DAY 12 7 11 23 12 8 19 10 19 9 8 28 MIN. QFE PRESSURE IN HPA 799.2 800.6 796.6 799.3 802.8 803.0 802.0 803.5 807.4 809.9 809.8 801.7 796.6 DAY 31 5 7 9 4 24 11 5 2 2 19 9 MEAN QNH PRESSURE IN HPA 1015.6 1015.7 1011.5 1014.9 1018.5 1015.4 1012.7 1015.2 1019.5 1021.3 1020.5 1017.0 1016.5 MAX. QNH PRESSURE IN HPA 1023.0 1022.4 1023.4 1021.7 1023.6 1020.5 1017.5 1018.3 1024.2 1027.0 1030.3 1024.1 1030.3 DAY 12 7 11 23 12 8 19 10 19 9 8 28 MIN. QNH PRESSURE IN HPA 1004.6 1006.3 1001.5 1004.7 1008.9 1009.2 1008.0 1009.8 1014.5 1017.5 1017.3 1007.6 1001.5 DAY 31 5 7 9 4 24 11 5 2 2 19 9 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 807.4 807.4 804.1 806.8 810.0 807.2 804.8 806.9 810.4 812.2 811.6 809.0 808.2 MAX. QFE PRESSURE IN HPA 813.5 813.3 813.7 812.3 814.5 811.5 808.7 809.6 814.1 817.1 819.2 814.5 819.2 DAY 12 7 11 23 12 8 19 10 18 9 7 28 MIN. QFE PRESSURE IN HPA 798.1 800.0 796.4 798.5 801.0 801.9 801.1 802.6 805.5 808.2 808.8 801.4 796.4 DAY 31 5 29 9 4 24 11 5 2 6 19 9 MEAN QNH PRESSURE IN HPA 1014.5 1014.5 1010.4 1013.8 1017.6 1014.3 1011.4 1013.9 1018.1 1020.3 1019.5 1016.3 1015.4 MAX. QNH PRESSURE IN HPA 1021.8 1021.6 1022.0 1020.4 1023.0 1019.4 1016.0 1017.1 1022.5 1026.1 1028.7 1023.0 1028.7 DAY 12 7 11 23 12 8 19 10 18 9 7 28 MIN. QNH PRESSURE IN HPA 1003.3 1005.6 1001.2 1003.8 1006.8 1007.8 1006.9 1008.7 1012.2 1015.4 1016.1 1007.2 1001.2 DAY 31 5 29 9 4 24 11 5 2 6 19 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 807.8 807.6 804.3 806.8 810.1 806.9 804.7 806.7 810.3 812.4 812.0 809.5 808.3 MAX. QFE PRESSURE IN HPA 813.8 813.2 813.6 812.3 814.7 811.0 808.0 809.6 814.2 816.8 819.5 814.6 819.5 DAY 12 7 11 23 12 8 19 24 14 8 7 28 MIN. QFE PRESSURE IN HPA 799.2 803.2 797.2 798.0 801.2 801.0 800.8 802.0 805.4 808.7 808.8 801.7 797.2 DAY 31 5 29 9 4 24 11 5 2 6 19 9 MEAN QNH PRESSURE IN HPA 1014.9 1014.7 1010.8 1013.8 1017.7 1013.9 1011.2 1013.6 1018.0 1020.5 1020.0 1017.0 1015.5 MAX. QNH PRESSURE IN HPA 1022.2 1021.4 1021.9 1020.4 1023.2 1018.8 1015.2 1017.1 1022.6 1025.8 1029.0 1023.1 1029.0 DAY 12 7 11 23 12 8 19 24 14 8 7 28 MIN. QNH PRESSURE IN HPA 1004.6 1009.4 1002.2 1003.1 1007.0 1006.8 1006.5 1008.0 1012.1 1016.0 1016.1 1007.6 1002.2 DAY 31 5 29 9 4 24 11 5 2 6 19 9 MEAN QFF PRESSURE IN HPA 1018.6 1020.2 1012.5 1009.1 1008.9 999.8 994.6 996.2 1006.4 1012.6 1018.7 1019.2 1009.7 MAX. QFF PRESSURE IN HPA 1029.0 1035.1 1025.4 1020.0 1016.0 1005.8 1001.4 1001.3 1017.3 1018.3 1029.8 1029.7 1035.1 DAY 19 7 10 13 12 6 5 24 14 8 7 28 MIN. QFF PRESSURE IN HPA 1005.3 1010.1 1000.9 999.7 1000.0 991.1 987.9 988.4 997.2 1003.5 1013.5 1007.4 987.9 DAY 16 22 25 9 4 30 11 5 2 6 19 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 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.7 -3.8 2.5 11.8 16.1 23.9 25.3 26.2 21.2 14.6 10.1 6.4 12.4 MINIMUN AIR TEMPERATURE (C) -9.7 -8.2 -2.1 5.3 9.2 15.7 16.3 17.8 13.1 7.2 4.3 1.5 5.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 2 7 2 0 0 0 12 DAYS WITH MINIMUM TEMP. <=-4 26 23 11 0 0 0 0 0 0 0 0 2 62 DAYS WITH FREEZING MIN.<= 0 31 26 20 0 0 0 0 0 0 0 1 14 92 TEMPERATURE RECORDS LOWEST(C) -20.0 -18.6 -11.6 0.4 2.0 10.0 11.4 12.0 8.2 1.4 -2.4 -11.0 -20.0 DAY 11 22 3 1 2 4 25 5 28 12 14 5 MAXIMUM AIR TEMPERATURE (C) -2.3 -0.4 6.0 16.3 20.6 28.7 30.5 31.5 26.6 19.9 14.5 10.3 16.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 8 20 23 2 0 0 0 53 DAYS WITH MAXIMUM TEMP. <= 0 26 16 3 0 0 0 0 0 0 0 0 0 45 TEMPERATURE RECORDS HIGHEST(C) 4.4 7.2 14.4 23.0 27.2 34.0 34.4 35.4 33.6 25.0 18.2 18.6 35.4 DAY 25 6 28 13 11 27 13 19 1 1 21 10 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 7.8 8.1 11.0 11.4 13.0 14.2 13.7 13.5 12.7 10.2 8.8 10.9 MEAN DAILY TEMP. (MDT) (C) -6.0 -4.3 2.0 10.8 14.9 22.2 23.4 24.7 19.8 13.6 9.4 5.9 11.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 50.3 77.9 121.1 17.5 0.0 0.0 0.0 266.8 HEATING DEG. DAYS(BASE 18 0C) 745.2 623.9 497.4 216.6 108.1 0.1 0.0 0.0 9.6 137.9 258.5 373.8 2971.1 DEWPOINT (MEAN C) -8.4 -7.4 -3.6 -0.6 2.6 2.8 5.9 3.9 0.9 -2.9 -2.4 -6.1 -1.3 MIXING RATIO (G/KG) 2.65 2.83 3.84 4.69 5.91 5.97 7.52 6.52 5.27 3.95 4.15 3.17 4.71 VAPOUR PRESSURE (HPA) 3.42 3.66 4.94 6.05 7.63 7.70 9.64 8.39 6.81 5.13 5.39 4.12 6.07 SATURATION DEF. (HPA) 0.77 1.19 2.83 8.61 11.52 22.92 23.70 27.06 19.45 12.31 7.37 6.01 11.98 RELATIVE HUMIDITY (MEAN %) 82 77 69 47 44 28 32 27 30 35 47 47 47 RELATIVE HUMIDITY (MAX. %) 90 88 82 66 66 43 50 43 50 52 62 60 63 RELATIVE HUMIDITY (MIN. %) 74 67 58 32 29 19 21 18 17 22 33 36 36 RELATIVE HUMIDITY (MEAN% 03UTC) 86 84 79 65 61 43 50 43 50 51 59 56 61 RELATIVE HUMIDITY (MEAN% 09UTC) 80 73 65 38 36 22 25 21 23 28 43 44 42 RELATIVE HUMIDITY (MEAN% 15UTC) 82 77 68 41 42 24 25 22 23 33 44 46 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.6 34.3 131.8 43.9 30.9 5.6 4.8 0.5 8.0 3.6 20.6 17.6 341.2 DAYS WITH PRECIPITATION >=10 0 0 3 0 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 5 2 3 4 3 3 1 0 0 1 0 2 1 20 DAYS WITH PRECIPITATION >= 1 12 7 9 10 8 1 2 0 2 1 5 1 58 DAYS WITH PRECIPITATION 14 15 14 12 13 4 4 2 2 2 5 7 94 GREATEST DAILY PRECIPITATION 7.0 9.0 52.0 9.7 9.0 5.0 2.0 0.3 5.0 3.0 6.0 16.2 52.0 DAY 9 20 18 4 13 19 17 3 13 10 16 4 DAY WITH THUNDER STORM 0 0 0 4 8 4 3 2 1 0 1 0 23 DAYS WITH SNOW OR SLEET 12 9 9 1 0 0 0 0 0 0 0 2 33 DAYS WITH DUST 0 0 0 0 1 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 315 225 225 225 135 135 135 135 135 225 180 225 PREVAILING WIND SPEED(KNOTS) 13.6 10.0 15.8 14.0 14.8 14.0 11.6 13.1 9.7 9.1 12.3 10.0 13.9 PREVAILING WIND PERCENT 14.8 16.4 21.3 26.7 17.4 24.0 25.8 24.5 13.3 16.8 15.3 21.3 13.8 CALMS PERCENT OF WIND 54.8 42.9 38.1 29.3 23.9 17.3 20.0 27.7 44.0 46.5 58.7 47.1 37.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 201 242 216 237 217 138 117 136 200 180 219 203 200 VECTOR WIND MAGNITUDE(KNOTS) 2.8 4.0 6.3 4.6 4.1 3.9 3.0 2.8 2.7 1.3 3.2 4.4 2.8 WIND STEADINESES (MEAN %) 50.0 54.1 71.6 53.5 48.2 36.4 30.9 31.5 48.2 27.7 71.1 74.6 37.8 WIND SPEED (MEAN KNOTS) 5.6 7.4 8.8 8.6 8.5 10.7 9.7 8.9 5.6 4.7 4.5 5.9 7.4 FASTEST WIND DIRECTION 210 240 240 270 240 120 240 120 130 40 230 230 240 FASTEST WIND SPEED (KNOTS) 25 35 29 29 29 25 27 23 19 19 23 29 35 DAY 31 14 19 28 21 13 28 1 1 8 10 18 DAYS WITH SKY CLEAR (0-2)/8 7 9 11 8 12 23 24 21 28 26 17 12 198 DAYS WITH P.CLOUDY (3-6)/8 12 8 10 17 18 7 7 10 2 4 10 14 119 DAYS WITH CLOUDY (7-8)/8 12 11 10 5 1 0 0 0 0 1 3 5 48 DAYS WITH VISIBILITY =< 2 KM 8 5 7 1 0 0 0 0 0 0 2 2 25 DURATION OF SUNSHINE HOURS 109.8 145.4 187.0 264.7 313.3 355.1 358.6 334.9 321.3 288.5 201.8 169.8 3050.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 806.9 807.8 807.0 809.2 810.2 810.2 807.1 809.9 810.4 813.5 813.2 813.1 809.9 MAX. QFE PRESSURE IN HPA 814.7 819.0 814.4 819.3 818.0 815.5 814.1 814.0 814.6 818.8 819.0 819.5 819.5 DAY-HOUR 22- 6 23- 6 28- 6 12- 6 8- 6 17- 3 20- 6 25- 6 19- 6 14- 6 21- 6 29- 6 MIN. QFE PRESSURE IN HPA 796.2 795.9 796.9 801.4 803.7 805.5 801.0 805.4 805.7 807.4 807.1 806.3 795.9 DAY-HOUR 13- 3 14- 3 18-12 21-15 29-12 24-15 4-15 13-15 4-15 1-12 10-12 24- 3 MEAN QNH PRESSURE IN HPA 1013.8 1015.0 1014.0 1016.6 1017.8 1017.8 1014.1 1017.5 1018.1 1021.7 1021.5 1021.3 1017.4 MAX. QNH PRESSURE IN HPA 1023.2 1028.4 1022.9 1028.8 1027.2 1024.2 1022.5 1022.4 1023.1 1028.2 1028.4 1029.0 1029.0 DAY-HOUR 22- 6 23- 6 28- 6 12- 6 8- 6 17- 3 20- 6 25- 6 19- 6 14- 6 21- 6 29- 6 MIN. QNH PRESSURE IN HPA 1001.0 1000.6 1001.8 1007.2 1010.0 1012.2 1006.8 1012.1 1012.4 1014.5 1014.1 1013.1 1000.6 DAY-HOUR 13- 3 14- 3 18-12 21-15 29-12 24-15 4-15 13-15 4-15 1-12 10-12 24- 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 806.6 807.3 806.9 809.3 810.4 810.6 807.8 810.6 810.9 813.6 813.3 813.0 810.0 MAX. QFE PRESSURE IN HPA 813.8 818.2 813.0 818.8 817.0 815.5 813.7 813.9 813.8 818.2 818.1 818.5 818.8 DAY 22 23 28 12 8 17 20 25 27 14 21 9 MIN. QFE PRESSURE IN HPA 796.2 795.9 799.9 802.5 804.7 807.6 802.8 807.3 807.3 809.3 808.5 806.3 795.9 DAY 13 14 15 23 30 27 5 13 5 1 11 24 MEAN QNH PRESSURE IN HPA 1013.5 1014.4 1013.9 1016.7 1018.0 1018.3 1014.9 1018.3 1018.6 1021.9 1021.5 1021.2 1017.6 MAX. QNH PRESSURE IN HPA 1022.2 1027.5 1021.2 1028.2 1026.0 1024.2 1022.0 1022.3 1022.2 1027.5 1027.3 1027.8 1028.2 DAY 22 23 28 12 8 17 20 25 27 14 21 9 MIN. QNH PRESSURE IN HPA 1001.0 1000.6 1005.4 1008.6 1011.2 1014.7 1008.9 1014.3 1014.3 1016.7 1015.8 1013.1 1000.6 DAY 13 14 15 23 30 27 5 13 5 1 11 24 MEAN QFF PRESSURE IN HPA 1021.2 1020.6 1014.9 1010.7 1008.8 1003.4 998.9 1001.8 1005.9 1014.7 1017.0 1019.2 1011.4 MAX. QFF PRESSURE IN HPA 1029.7 1037.8 1025.2 1021.2 1019.8 1011.4 1007.9 1007.5 1012.6 1023.7 1022.8 1032.5 1037.8 DAY 23 22 4 7 4 17 21 3 28 11 25 5 MIN. QFF PRESSURE IN HPA 1007.3 1000.5 1003.1 1002.7 1000.0 995.6 991.9 995.2 999.0 1005.0 1008.1 1008.8 991.9 DAY 30 8 30 17 21 27 5 17 2 2 11 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 807.5 808.4 807.8 809.9 811.0 811.0 808.1 811.0 811.5 814.5 814.1 813.9 810.7 MAX. QFE PRESSURE IN HPA 814.7 819.0 814.4 819.3 818.0 815.3 814.1 814.0 814.6 818.8 819.0 819.5 819.5 DAY 22 23 28 12 8 17 20 25 19 14 21 29 MIN. QFE PRESSURE IN HPA 797.2 799.0 801.3 803.4 804.9 808.0 803.0 807.6 807.6 809.7 810.0 808.2 797.2 DAY 13 15 15 23 21 27 5 13 5 1 10 24 MEAN QNH PRESSURE IN HPA 1014.5 1015.7 1014.9 1017.5 1018.8 1018.8 1015.3 1018.8 1019.4 1023.0 1022.6 1022.3 1018.5 MAX. QNH PRESSURE IN HPA 1023.2 1028.4 1022.9 1028.8 1027.2 1024.0 1022.5 1022.4 1023.1 1028.2 1028.4 1029.0 1029.0 DAY 22 23 28 12 8 17 20 25 19 14 21 29 MIN. QNH PRESSURE IN HPA 1002.2 1004.4 1007.1 1009.6 1011.5 1015.2 1009.2 1014.7 1014.7 1017.2 1017.6 1015.4 1002.2 DAY 13 15 15 23 21 27 5 13 5 1 10 24 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 807.1 808.1 807.3 809.5 810.5 810.5 807.4 810.3 810.7 813.7 813.3 813.2 810.1 MAX. QFE PRESSURE IN HPA 814.5 818.6 813.6 819.1 817.3 814.4 813.6 813.3 813.7 818.1 818.1 818.8 819.1 DAY 22 23 26 12 8 17 20 25 19 13 21 9 MIN. QFE PRESSURE IN HPA 798.0 797.9 798.3 802.9 804.4 807.2 802.6 807.1 807.3 808.8 807.8 808.1 797.9 DAY 13 14 18 23 21 27 5 13 4 1 10 24 MEAN QNH PRESSURE IN HPA 1014.1 1015.3 1014.3 1017.0 1018.2 1018.2 1014.4 1017.9 1018.4 1022.0 1021.6 1021.5 1017.7 MAX. QNH PRESSURE IN HPA 1023.0 1027.9 1021.9 1028.5 1026.4 1022.9 1021.9 1021.6 1022.0 1027.3 1027.3 1028.2 1028.5 DAY 22 23 26 12 8 17 20 25 19 13 21 9 MIN. QNH PRESSURE IN HPA 1003.1 1003.0 1003.5 1009.0 1010.8 1014.2 1008.7 1014.1 1014.3 1016.1 1014.9 1015.3 1003.0 DAY 13 14 18 23 21 27 5 13 4 1 10 24 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 806.5 807.5 806.5 808.7 809.7 809.5 806.4 809.1 809.5 812.7 812.4 812.4 809.2 MAX. QFE PRESSURE IN HPA 813.7 817.9 813.1 818.0 816.4 813.5 812.5 811.9 812.4 817.5 817.6 817.8 818.0 DAY 22 22 27 12 8 16 20 29 19 13 21 9 MIN. QFE PRESSURE IN HPA 798.5 798.3 796.9 801.7 803.7 806.1 801.4 806.0 806.1 807.4 807.1 807.2 796.9 DAY 12 14 18 21 29 27 5 22 4 1 10 20 MEAN QNH PRESSURE IN HPA 1013.4 1014.6 1013.4 1016.0 1017.2 1017.0 1013.2 1016.5 1017.0 1020.8 1020.5 1020.5 1016.7 MAX. QNH PRESSURE IN HPA 1022.0 1027.1 1021.3 1027.2 1025.3 1021.8 1020.6 1019.9 1020.5 1026.6 1026.7 1027.0 1027.2 DAY 22 22 27 12 8 16 20 29 19 13 21 9 MIN. QNH PRESSURE IN HPA 1003.8 1003.5 1001.8 1007.6 1010.0 1012.9 1007.2 1012.8 1012.9 1014.5 1014.1 1014.2 1001.8 DAY 12 14 18 21 29 27 5 22 4 1 10 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 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 806.8 807.8 806.8 808.5 809.6 809.2 806.1 808.9 809.5 812.9 812.9 812.9 809.3 MAX. QFE PRESSURE IN HPA 813.5 818.2 813.1 817.1 815.9 814.1 812.2 812.0 812.9 818.3 818.1 818.2 818.3 DAY 22 22 27 11 8 16 20 29 27 13 21 9 MIN. QFE PRESSURE IN HPA 796.9 798.0 798.2 801.4 803.8 805.5 801.0 805.4 805.7 807.6 807.7 807.6 796.9 DAY 12 13 18 21 21 24 4 13 4 1 10 20 MEAN QNH PRESSURE IN HPA 1013.7 1014.9 1013.7 1015.8 1017.1 1016.6 1012.9 1016.3 1017.0 1021.1 1021.1 1021.1 1016.8 MAX. QNH PRESSURE IN HPA 1021.8 1027.5 1021.3 1026.1 1024.7 1022.5 1020.2 1020.0 1021.1 1027.6 1027.3 1027.5 1027.6 DAY 22 22 27 11 8 16 20 29 27 13 21 9 MIN. QNH PRESSURE IN HPA 1001.8 1003.1 1003.4 1007.2 1010.1 1012.2 1006.8 1012.1 1012.4 1014.7 1014.8 1014.7 1001.8 DAY 12 13 18 21 21 24 4 13 4 1 10 20 MEAN QFF PRESSURE IN HPA 1021.5 1021.2 1014.5 1009.7 1007.7 1001.7 996.9 999.7 1004.5 1013.9 1016.5 1019.2 1010.6 MAX. QFF PRESSURE IN HPA 1030.5 1039.3 1026.9 1019.9 1018.2 1009.0 1006.1 1004.5 1012.4 1024.1 1022.3 1031.5 1039.3 DAY 22 22 3 6 3 16 20 3 27 9 24 5 MIN. QFF PRESSURE IN HPA 1008.1 1004.3 1002.6 1000.5 999.5 993.4 990.0 992.8 997.2 1003.1 1006.8 1009.7 990.0 DAY 12 7 29 21 29 24 12 13 2 1 10 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 KHODABANDEH (40733) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 7 N LONGITUDE 48 35 E DATA PROCESSING CENTER ELEVATION 1887.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.8 2.8 5.5 11.4 18.8 24.0 24.1 26.6 21.0 15.4 5.0 1.7 13.0 MINIMUN AIR TEMPERATURE (C) -4.6 -1.9 -0.7 4.2 10.5 14.7 15.4 18.7 12.5 8.8 0.3 -2.8 6.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 1 1 7 0 0 0 0 10 DAYS WITH MINIMUM TEMP. <=-4 17 7 5 0 0 0 0 0 0 0 4 8 41 DAYS WITH FREEZING MIN.<= 0 29 22 18 1 0 0 0 0 0 0 13 23 106 TEMPERATURE RECORDS LOWEST(C) -10.6 -8.8 -7.6 -2.0 1.0 10.2 9.4 13.0 5.0 1.6 -8.0 -15.6 -15.6 DAY 22 22 19 10 21 17 13 20 28 26 30 5 MAXIMUM AIR TEMPERATURE (C) 2.9 6.8 10.0 16.3 23.6 29.2 29.6 31.6 26.4 20.3 9.2 5.5 17.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 12 16 27 4 0 0 0 61 DAYS WITH MAXIMUM TEMP. <= 0 10 1 0 0 0 0 0 0 0 0 1 4 16 TEMPERATURE RECORDS HIGHEST(C) 9.4 12.6 18.2 22.0 30.6 33.4 36.2 34.0 30.4 26.0 14.2 15.6 36.2 DAY 8 26 31 29 30 21 4 1 7 4 6 31 DIF. BETWEEN (MAX.-MIN.) (C) 7.5 8.7 10.7 12.1 13.1 14.5 14.2 12.9 13.9 11.5 8.9 8.3 11.3 MEAN DAILY TEMP. (MDT) (C) -0.9 2.4 4.7 10.2 17.1 21.9 22.5 25.2 19.5 14.5 4.7 1.3 11.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 8.0 44.5 68.7 130.1 17.4 0.0 0.0 0.0 268.7 HEATING DEG. DAYS(BASE 18 0C) 584.6 435.5 413.3 233.3 61.9 1.3 1.7 0.0 23.4 115.3 397.9 516.4 2784.5 DEWPOINT (MEAN C) -6.2 -6.5 -7.3 -2.5 -1.3 0.0 5.1 5.0 1.8 -1.0 -2.6 -4.6 -1.7 MIXING RATIO (G/KG) 3.09 3.04 2.89 4.17 4.46 4.91 7.07 7.07 5.58 4.52 4.03 3.45 4.52 VAPOUR PRESSURE (HPA) 4.00 3.92 3.73 5.39 5.76 6.33 9.06 9.09 7.20 5.85 5.22 4.48 5.84 SATURATION DEF. (HPA) 1.98 3.79 5.69 8.72 17.05 24.62 22.47 26.71 18.88 12.59 3.93 2.78 12.43 RELATIVE HUMIDITY (MEAN %) 69 53 44 43 29 23 34 29 32 38 61 67 44 RELATIVE HUMIDITY (MAX. %) 82 67 64 65 48 39 52 45 50 51 76 80 60 RELATIVE HUMIDITY (MIN. %) 55 38 28 26 17 14 22 19 19 29 48 54 31 RELATIVE HUMIDITY (MEAN% 03UTC) 76 63 59 63 44 39 51 43 50 50 73 76 57 RELATIVE HUMIDITY (MEAN% 09UTC) 67 50 37 36 23 19 27 22 26 33 56 61 38 RELATIVE HUMIDITY (MEAN% 15UTC) 67 49 38 36 26 16 30 27 25 33 60 65 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 53.9 49.0 48.5 34.0 11.6 0.0 23.2 22.7 0.0 23.0 28.0 35.2 329.1 DAYS WITH PRECIPITATION >=10 2 3 2 1 0 0 1 2 0 0 1 3 15 DAYS WITH PRECIPITATION >= 5 3 5 2 1 0 0 2 2 0 3 3 3 24 DAYS WITH PRECIPITATION >= 1 5 7 6 6 4 0 3 2 0 4 4 5 46 DAYS WITH PRECIPITATION 8 7 7 11 7 0 4 6 0 6 7 6 69 GREATEST DAILY PRECIPITATION 22.0 14.0 24.0 20.8 4.0 0.0 15.0 11.0 0.0 8.0 12.0 10.3 24.0 DAY 9 20 21 2 9