Tehran Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from very hot to chilly in Tehran. Average daytime temperatures reach a very hot 35°C (95°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 5°C (41°F).

At night, temperatures range from around 24°C (75°F) in July to -6°C (21°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Tehran has a relatively dry climate with low precipitation, averaging 361 mm (14 in) of rain/snowfall annually. Tehran can be quite wet during March, receiving approximately 62 mm (2.4 in) of precipitation over 11 rainy days.

In contrast, during the driest month (August), you will experience much drier conditions, with 3.4 mm (0.1 in) of precipitation spread across 2 rainy days. For more details, please visit our Tehran Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Tehran can be enjoyed more throughout the sunniest month of June under a blue sky, with approximately 11.6 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 5.7 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is moderate throughout the year in Tehran.

The city experiences its highest humidity in January, reaching 65%. In June, the humidity drops to its lowest level at 24%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

The mean wind speed over the year ranges from 1 m/s (2 knots) in January and December to 3 m/s (6 knots) in March, April, May and June. What does this mean?

The mean monthly wind speed over the year (meters per second)