Iran climate guide

Temperature in Iran (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
5°C maximum daytime temperature in January in Iran (Tehran)5
8°C maximum daytime temperature in February in Iran (Tehran)8
14°C maximum daytime temperature in March in Iran (Tehran)14
20°C maximum daytime temperature in April in Iran (Tehran)20
26°C maximum daytime temperature in May in Iran (Tehran)26
32°C maximum daytime temperature in June in Iran (Tehran)32
35°C maximum daytime temperature in July in Iran (Tehran)35
34°C maximum daytime temperature in August in Iran (Tehran)34
30°C maximum daytime temperature in September in Iran (Tehran)30
22°C maximum daytime temperature in October in Iran (Tehran)22
15°C maximum daytime temperature in November in Iran (Tehran)15
8°C maximum daytime temperature in December in Iran (Tehran)8
Min temperature (night-time)
-3°C minimum night-time temperature in January in Iran (Tehran)-3
-1°C minimum night-time temperature in February in Iran (Tehran)-1
3°C minimum night-time temperature in March in Iran (Tehran)3
9°C minimum night-time temperature in April in Iran (Tehran)9
14°C minimum night-time temperature in May in Iran (Tehran)14
19°C minimum night-time temperature in June in Iran (Tehran)19
22°C minimum night-time temperature in July in Iran (Tehran)22
21°C minimum night-time temperature in August in Iran (Tehran)21
17°C minimum night-time temperature in September in Iran (Tehran)17
11°C minimum night-time temperature in October in Iran (Tehran)11
5°C minimum night-time temperature in November in Iran (Tehran)5
0°C minimum night-time temperature in December in Iran (Tehran)0

Sunshine & Daylight in Iran

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
5 hours of sunshine per day (54% of daylight hours) in January in Iran5
6 hours of sunshine per day (57% of daylight hours) in February in Iran6
6 hours of sunshine per day (53% of daylight hours) in March in Iran6
7 hours of sunshine per day (55% of daylight hours) in April in Iran7
9 hours of sunshine per day (64% of daylight hours) in May in Iran9
11 hours of sunshine per day (78% of daylight hours) in June in Iran11
11 hours of sunshine per day (77% of daylight hours) in July in Iran11
11 hours of sunshine per day (78% of daylight hours) in August in Iran11
10 hours of sunshine per day (80% of daylight hours) in September in Iran10
8 hours of sunshine per day (70% of daylight hours) in October in Iran8
7 hours of sunshine per day (65% of daylight hours) in November in Iran7
5 hours of sunshine per day (55% of daylight hours) in December in Iran5
Daily hours of daylight
10 hours of daylight per day in January in Iran (Tehran)10
11 hours of daylight per day in February in Iran (Tehran)11
12 hours of daylight per day in March in Iran (Tehran)12
13 hours of daylight per day in April in Iran (Tehran)13
14 hours of daylight per day in May in Iran (Tehran)14
15 hours of daylight per day in June in Iran (Tehran)15
14 hours of daylight per day in July in Iran (Tehran)14
13 hours of daylight per day in August in Iran (Tehran)13
12 hours of daylight per day in September in Iran (Tehran)12
11 hours of daylight per day in October in Iran (Tehran)11
10 hours of daylight per day in November in Iran (Tehran)10
10 hours of daylight per day in December in Iran (Tehran)10

Rainfall in Iran

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
10 days with some rainfall in January in Iran (Tehran)10
9 days with some rainfall in February in Iran (Tehran)9
11 days with some rainfall in March in Iran (Tehran)11
11 days with some rainfall in April in Iran (Tehran)11
10 days with some rainfall in May in Iran (Tehran)10
3 days with some rainfall in June in Iran (Tehran)3
2 days with some rainfall in July in Iran (Tehran)2
2 days with some rainfall in August in Iran (Tehran)2
2 days with some rainfall in September in Iran (Tehran)2
6 days with some rainfall in October in Iran (Tehran)6
6 days with some rainfall in November in Iran (Tehran)6
9 days with some rainfall in December in Iran (Tehran)9
Average monthly rainfall (mm)
37 mm monthly rainfall in January in Iran (Tehran)37
35 mm monthly rainfall in February in Iran (Tehran)35
40 mm monthly rainfall in March in Iran (Tehran)40
33 mm monthly rainfall in April in Iran (Tehran)33
22 mm monthly rainfall in May in Iran (Tehran)22
6 mm monthly rainfall in June in Iran (Tehran)6
5 mm monthly rainfall in July in Iran (Tehran)5
3 mm monthly rainfall in August in Iran (Tehran)3
3 mm monthly rainfall in September in Iran (Tehran)3
17 mm monthly rainfall in October in Iran (Tehran)17
22 mm monthly rainfall in November in Iran (Tehran)22
36 mm monthly rainfall in December in Iran (Tehran)36

More climate for Iran

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 3 (Moderate) in January in Iran (Tehran)3
UV (maximum) index 4 (Moderate) in February in Iran (Tehran)4
UV (maximum) index 6 (High) in March in Iran (Tehran)6
UV (maximum) index 8 (Very High) in April in Iran (Tehran)8
UV (maximum) index 11 (Extreme) in May in Iran (Tehran)11
UV (maximum) index 11+ (Extreme) in June in Iran (Tehran)11
UV (maximum) index 11+ (Extreme) in July in Iran (Tehran)11
UV (maximum) index 11 (Extreme) in August in Iran (Tehran)11
UV (maximum) index 9 (Very High) in September in Iran (Tehran)9
UV (maximum) index 6 (High) in October in Iran (Tehran)6
UV (maximum) index 3 (Moderate) in November in Iran (Tehran)3
UV (maximum) index 2 (Low) in December in Iran (Tehran)2
Heat & Humidity
No heat & humidity in January in Iran (Tehran)0
No heat & humidity in February in Iran (Tehran)0
No heat & humidity in March in Iran (Tehran)0
No heat & humidity in April in Iran (Tehran)0
Low heat & humidity in May in Iran (Tehran)L
High heat & humidity in June in Iran (Tehran)H
High heat & humidity in July in Iran (Tehran)H
High heat & humidity in August in Iran (Tehran)H
Moderate heat & humidity in September in Iran (Tehran)M
No heat & humidity in October in Iran (Tehran)0
No heat & humidity in November in Iran (Tehran)0
No heat & humidity in December in Iran (Tehran)0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Going to Iran? Find the best month to visit Iran based on the weather.

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Check climate guides for Iran showing average temperature, rainfall & sunshine figures for each month of the year. The climate guide shown above is for Tehran.

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More about Iran

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The climate guide for Iran, represented by Tehran, shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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Iran climate overview

Named after the Aryan people who settled in this region 3,000 years ago, Iran is a large country extending from the Caspian Sea in the north to the Persian Gulf and Gulf of Oman in the south. The country is extremely mountainous, and apart from coastal plains and two areas of the south-east, almost all of it lies over 700 metres above sea level.

Its position in western Asia roughly 30° north of the equator places it in a region of descending warm stable tropical air, which produces very dry conditions everywhere most of the time. Only in areas bordering the Caspian Sea and in some mountain regions in the west are there significant levels of rainfall. Elsewhere hot dry summers and cold to very cold winters are the norm.

The country is dominated by two mountain ranges with the high Iranian Plateau lying between, much of which is desert, and where summer temperatures are among the highest in world. In the west the Zagros Mountains stretch almost the entire length of the country and in the north the Alborz Mountains skirt the Caspian Sea.

Iran's capital Tehran lies at the northern edge of the Plateau in the shadow of the Alborz Mountains. Summers here are generally dry and hot with low humidity and plenty of sunshine, but the city is far enough north and sufficiently high in elevation to experience wet and cold winters with occasional snow.

The Alborz Mountains are snow-covered for most of the winter and home to some of the highest ski resorts in the Northern Hemisphere. The northern foothills, running down to the Caspian Sea coast, are wet and fertile and receive adequate rainfall to support the cultivation of tea, cotton, and rice as well as forests of beech and oak.

Being an Islamic state Iran is a country with a strict dress code that applies to all visitors. It is also subject to numerous and often severe earthquakes.

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