Tehran Weather

Tehran has a cold semi-arid climate with continental climate characteristics and a Mediterranean climate precipitation pattern. Tehran’s climate is largely defined by its geographic location, with the towering Alborz mountains to its north and the country’s central desert to the south. It can be generally described as mild in spring and autumn, hot and dry in summer, and cold and wet in winter.

As the city has a large area, with significant differences in elevation among various districts, the weather is often cooler in the hilly north than in the flat southern part of Tehran. For instance, the 17.3 km (10.7 mi) Valiasr Street runs from Tehran’s railway station at 1,117 m (3,665 ft) elevation above sea level in the south of the city to Tajrish Square at 1712.6 m (5612.3 ft) elevation above sea level in the north. However, the elevation can even rise up to 2,000 m (6,600 ft) at the end of Velenjak in northern Tehran.

Summer is long, hot, and dry with little rain, but relative humidity is generally low, making the heat tolerable. Average high temperatures are between 32 and 37 °C (90 and 99 °F), and it can occasionally drop to 14 °C (57 °F)  in the mountainous north of the city at night. Most of the light annual precipitation occurs from late autumn to mid-spring, but no one month is particularly wet. The hottest month is July, with a mean minimum temperature of 26 °C (79 °F) and a mean maximum temperature of 34 °C (93 °F), and the coldest is January, with a mean minimum temperature of −5 °C (23 °F) and a mean maximum temperature of 1 °C (34 °F).

The weather of Tehran can sometimes be unpredictably harsh. The record high temperature is 43 °C (109 °F) and the record low is −20 °C (−4 °F). On January 5 and 6, 2008, 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 a state of emergency and close down the capital from January 6 through January 7.

Tehran has seen an increase in relative humidity and annual precipitation since the beginning of the 21st century. This is most likely afforestation projects, which include expanding parks and lakes. The northern parts of Tehran are, still, more lush than the southern parts.

Average Temperature
Jan
50 °F
10 °C
Feb
49 °F
10 °C
Mar
55 °F
13 °C
Apr
64 °F
18 °C
May
79 °F
26 °C
Jun
91 °F
33 °C
Jul
99 °F
37 °C
Aug
93 °F
34 °C
Sep
88 °F
31 °C
Oct
75 °F
24 °C
Nov
56 °F
14 °C
Dec
54 °F
12 °C
Humidity
Jan
37%
Feb
38%
Mar
38%
Apr
35%
May
31%
Jun
23%
Jul
16%
Aug
18%
Sep
26%
Oct
30%
Nov
54%
Dec
51%
Rain
Jan
38mm
Feb
20mm
Mar
29mm
Apr
37mm
May
12mm
Jun
2mm
Jul
7mm
Aug
7mm
Sep
3mm
Oct
54mm
Nov
21mm
Dec
35mm
Clouds
Jan
27%
Feb
19%
Mar
34%
Apr
36%
May
20%
Jun
7%
Jul
6%
Aug
2%
Sep
0%
Oct
15%
Nov
34%
Dec
44%
Air quality US AQI
Jan
129
Feb
162
Mar
162
Apr
162
May
162
Jun
109
Jul
103
Aug
95
Sep
93
Oct
102
Nov
122
Dec
139
Sun
Jan
3UVI
Feb
4UVI
Mar
5UVI
Apr
7UVI
May
10UVI
Jun
12UVI
Jul
12UVI
Aug
11UVI
Sep
9UVI
Oct
6UVI
Nov
3UVI
Dec
2UVI