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Tehran Climate

Written by Super User. Posted in All about Tehran

 

All about Tehran
All about Tehran
All about Tehran

Teheran Climate

By:H.Shams

Teheran has a semi-dry, continental climate (Köppen Klimaklassifikation: BSk). The northern parts reach a Mediterranean climate (Csa) adjacent to damp continental (Dsa). The climate of Tehran is largely defined by its geographical location, with the towering Alborz Mountains to the north and the central desert to the south. It can be generally described as mild in spring and autumn, hot and dry in summer and cold in winter. Because the city is large with considerable differences in altitude between the different districts, the weather in the hilly north is often cooler than in the flat southern part of Tehran. For example, the road runs from 17.3 km (10.7 miles) of Vali E Asr from Tehran station, 1,117 m above sea level, to the south of the city to Tajrish Square, 1,612 m (5,289 ft) above sea level, In the north, but the elevation can reach as far as the end of Velenjak road in the north of Tehran even up to 1,900 m (6,200 ft).
The summer is usually hot and dry with very little rain, but the relative humidity is usually low and the nights are cool. Most of the light annual precipitation occurs from late autumn to mid-spring, but not a single month is particularly wet. The hottest month is July, mean minimum temperature 26 ° C (79 ° F); Average maximum temperature is 36 ° C (97 ° F), and the coldest is January, average minimum temperature is -1 ° C (30 ° F); Average maximum temperature 8 ° C (46 ° F).
Although Tehran enjoys a more moderate climate than other parts of the country, the weather can sometimes be unpredictable. The record high temperature is 43 ° C (109 ° F) and the record low is -17 ° C (1 ° F). On 5 and 6 January 2008, after years of relatively small snow, a wave of heavy snow and low temperatures covered the city in a thick layer of snow and ice, forcing the Council of Ministers to officially declare an exceptional state and close the capital On 6 and 7 January.
In February 2005 the heavy snow covered the whole of the city. The snow was 15 cm (6 in) in the southern part of the city and 100 cm (39 in) in the north of the city. One newspaper said it was the worst weather in 34 years. 10,000 bulldozer and 13,000 municipal workers who were deployed to open the main roads.
Tehran has seen an increase in relative humidity and annual rainfall since the beginning of the 21st century. This is most likely due to afforestation projects, including the expansion of parks and lakes. The northern parts of Tehran are even more abundant than the southern parts.
Tehran's climate can be described to have some monsoon influences; The summers are very dry, and the spring and fall are quite lush, with the main precipitation occurring at this time.
On January 21, 2012, the local weather experienced an unexpected turbulence from weather forecasts. On this day, the moderate fell to -17 ° C (1 ° F) and remained at -10 ° C (14 ° F) for 3 days.

 

Climate data for Tehran-MEHRABAD AIRPORT, Altitude: 1190.8 M - from 1988-2005
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Record high °C (°F) 19.6
(67.3)
23.0
(73.4)
28.0
(82.4)
32.4
(90.3)
37.0
(98.6)
41.0
(105.8)
43.0
(109.4)
42.0
(107.6)
38.0
(100.4)
33.4
(92.1)
26.0
(78.8)
21.0
(69.8)
43
(109.4)
Average high °C (°F) 7.9
(46.2)
10.4
(50.7)
15.4
(59.7)
22.1
(71.8)
27.9
(82.2)
33.9
(93)
36.6
(97.9)
35.6
(96.1)
31.6
(88.9)
24.4
(75.9)
16.2
(61.2)
10.0
(50)
22.67
(72.8)
Average low °C (°F) −0.4
(31.3)
1.2
(34.2)
5.4
(41.7)
11.2
(52.2)
16.1
(61)
20.9
(69.6)
23.9
(75)
23.3
(73.9)
19.3
(66.7)
13.3
(55.9)
6.7
(44.1)
1.7
(35.1)
11.88
(53.39)
Record low °C (°F) −15.0
(5)
−13.0
(8.6)
−8.0
(17.6)
−4.0
(24.8)
2.4
(36.3)
5.0
(41)
14.0
(57.2)
13.0
(55.4)
9.0
(48.2)
2.8
(37)
−7.0
(19.4)
−13.0
(8.6)
−15
(5)
Precipitation mm (inches) 34.6
(1.362)
32.2
(1.268)
40.8
(1.606)
30.7
(1.209)
15.4
(0.606)
3.0
(0.118)
2.3
(0.091)
1.8
(0.071)
1.1
(0.043)
10.9
(0.429)
26.0
(1.024)
34.0
(1.339)
232.8
(9.166)
Avg. rainy days 9.1 8.4 10.9 10.7 8.8 3.0 2.1 1.3 1.0 5.2 7.1 8.8 76.4
Avg. snowy days 5.1 2.9 1.1 0.1 0 0 0 0 0 0 0.4 2.7 12.3
 % humidity 64 56 48 41 33 25 26 26 27 36 49 62 41.1
Mean monthly sunshine hours 173.6 182.8 205.5 222.8 289.5 345.1 349.5 340.3 304.0 256.1 194.9 166.1 3,030.2
 
Climate data for Tehran-shomal (north of tehran), Altitude: 1548.2 M from: 1988-2005
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Record high °C (°F) 16.4
(61.5)
19.0
(66.2)
23.8
(74.8)
33.6
(92.5)
33.6
(92.5)
37.8
(100)
39.8
(103.6)
39.4
(102.9)
35.6
(96.1)
31.2
(88.2)
23.0
(73.4)
19.0
(66.2)
39.8
(103.6)
Average high °C (°F) 6.1
(43)
8.1
(46.6)
12.9
(55.2)
19.8
(67.6)
25.0
(77)
31.2
(88.2)
33.9
(93)
33.5
(92.3)
29.3
(84.7)
22.4
(72.3)
14.3
(57.7)
8.6
(47.5)
20.43
(68.76)
Average low °C (°F) −1.5
(29.3)
−0.2
(31.6)
4.0
(39.2)
9.8
(49.6)
14
(57)
19.6
(67.3)
22.6
(72.7)
21.9
(71.4)
17.5
(63.5)
11.6
(52.9)
5.4
(41.7)
1.0
(33.8)
10.48
(50.83)
Record low °C (°F) −11.4
(11.5)
−11.0
(12.2)
−8.0
(17.6)
−1.6
(29.1)
3.0
(37.4)
12.0
(53.6)
15.4
(59.7)
13.5
(56.3)
8.8
(47.8)
2.6
(36.7)
−5.2
(22.6)
−9.6
(14.7)
−11.4
(11.5)
Precipitation mm (inches) 63.1
(2.484)
66.5
(2.618)
83.3
(3.28)
50.1
(1.972)
27.1
(1.067)
4.0
(0.157)
4.2
(0.165)
3.2
(0.126)
3.4
(0.134)
16.5
(0.65)
41.3
(1.626)
66.3
(2.61)
429
(16.889)
Avg. rainy days 12.3 10.9 12.3 10.0 8.9 3.3 3.4 1.6 1.3 5.8 8.6 10.7 89.1
Avg. snowy days 8.9 6.6 2.5 0.1 0.1 0 0 0 0 0 0.6 4.9 23.7
 % humidity 67 59 53 44 39 30 31 31 33 44 57 66 46.2
Mean monthly sunshine hours 137.2 151.1 186.0 219.1 279.8 328.7 336.6 336.8 300.5 246.8 169.4 134.1 2,826.1

 

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