Asia › Iran › Tehran
30-year normals (1991-2020)
Tehran has a semi-arid steppe climate, classified as BSk in the Köppen system. The warmest month is June with an average high of 35°C, while the coldest month is December with lows dropping to -4°C. The annual temperature range of 39°C is typical of continental climates with distinct seasons.
The driest month is December with only 1 rain days and 7mm of precipitation. For travellers, December through to the following month typically offers the best balance of warm temperatures and dry conditions. Average humidity ranges from 45% to 45% throughout the year.
Based on temperature and rainfall data, the best months to visit Tehran are February, March, April. These months offer the most comfortable temperatures with relatively low rainfall, ideal for sightseeing and outdoor activities.
Full Best Time to Visit GuideWarmest Month
35°C
June
Coldest Month
-4°C
December
Driest Month
1 days
December
Annual Range
39°C
-4° to 35°
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 11°C | -2°C | 2 | 2h | View |
| February | 16°C | 3°C | 2 | 4h | View |
| March | 22°C | 9°C | 3 | 5h | View |
| April | 29°C | 16°C | 4 | 7h | View |
| May | 33°C | 20°C | 4 | 8h | View |
| June | 35°C | 22°C | 5 | 8h | View |
| July | 33°C | 20°C | 4 | 8h | View |
| August | 29°C | 16°C | 4 | 7h | View |
| September | 22°C | 9°C | 3 | 5h | View |
| October | 16°C | 3°C | 2 | 4h | View |
| November | 11°C | -2°C | 2 | 2h | View |
| December | 9°C | -4°C | 1 | 2h | View |
January
2 rain days, 2h sun
February
2 rain days, 4h sun
March
3 rain days, 5h sun
April
4 rain days, 7h sun
May
4 rain days, 8h sun
June
5 rain days, 8h sun
July
4 rain days, 8h sun
August
4 rain days, 7h sun
September
3 rain days, 5h sun
October
2 rain days, 4h sun
November
2 rain days, 2h sun
December
1 rain days, 2h sun
Tehran in June
Data Sources for Tehran
Climate normals represent 30-year averages (1991-2020). Individual years may vary.