Capital city in Tehran Province, Iran
Tehran weather by month and the best time to visit
When to go to Tehran
Apr–May and Oct are mild. Summers are hot; winters are cold with heavy smog from Nov–Jan. Nowruz (around 21 March) closes much of the country.
Tehran weather by month
Average daily high, rainfall and conditions.
- Jan8°33 mm
- Feb11°34 mm
- Mar17°35 mm
- Apr22°38 mm
- May29°15 mm
- Jun35°6 mm
- Jul38°7 mm
- Aug36°8 mm
- Sep32°16 mm
- Oct24°36 mm
- Nov15°45 mm
- Dec10°35 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 8°C47°F | -2°C29°F | 33 mm | 58% | Cold |
| February | 11°C52°F | 0°C31°F | 34 mm | 55% | Cool |
| March | 17°C63°F | 4°C40°F | 35 mm | 50% | Cool |
| April | 22°C72°F | 9°C48°F | 38 mm | 48% | Pleasant |
| May | 29°C85°F | 15°C59°F | 15 mm | 38% | Pleasant |
| June | 35°C96°F | 20°C69°F | 6 mm | 25% | Hot |
| July | 38°C100°F | 23°C74°F | 7 mm | 23% | Very hot |
| August | 36°C97°F | 22°C72°F | 8 mm | 23% | Very hot |
| September | 32°C89°F | 18°C65°F | 16 mm | 28% | Pleasant |
| October | 24°C76°F | 12°C54°F | 36 mm | 40% | Pleasant |
| November | 15°C59°F | 4°C40°F | 45 mm | 54% | Cool |
| December | 10°C50°F | 0°C32°F | 35 mm | 59% | Cold |
Best months across Iran
Quick answers
What is the best month to visit Tehran?
Apr–May, Oct. Apr–May and Oct are mild. Summers are hot; winters are cold with heavy smog from Nov–Jan. Nowruz (around 21 March) closes much of the country.
When is the rainy season in Tehran?
Rain peaks in November with about 45 mm. No month averages 150 mm or more.
What is the hottest month in Tehran?
July, with average highs of 38°C (100°F).
How cold does Tehran get?
The coolest nights are in January, averaging -2°C (29°F).
More about Tehran
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Sources
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.