Iran climate guide

Read our complete guide to the climate in Iran.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum daytime temperature °C
Hours of sunshine (daily)
Days with some rainfall

Below are average maximum temperatures at popular destinations in Iran for next month - January. Select a destination to see the climate guide for all months of the year.

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The climate guide for Iran (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.

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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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