Tehran, Iran climate
Average temperatures, precipitation and all-time records for Tehran, Iran, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is July, averaging a high of 31°C, and its coldest is January, with an average low of -9°C.
Tehran is the capital and largest city of Iran. It is also the capital of Tehran province and the administrative center for Tehran County and its Central District. via Wikipedia
How today compares
Latest recorded day: 2026-09-04. Each reading placed on Tehran, Iran's own ±7-day seasonal distribution.
Tehran average temperatures by month
Typical daily high and low, and average precipitation, for each month in Tehran, Iran, based on 1980–2026 records. The wettest month is February (3 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 1°C | -9°C | 0 mm |
| February | 3°C | -7°C | 3 mm |
| March | 7°C | -1°C | 3 mm |
| April | 15°C | 6°C | 3 mm |
| May | 22°C | 11°C | 0 mm |
| June | 28°C | 18°C | 0 mm |
| July | 31°C | 21°C | 0 mm |
| August | 30°C | 21°C | 0 mm |
| September | 26°C | 16°C | 0 mm |
| October | 19°C | 9°C | 0 mm |
| November | 10°C | 1°C | 3 mm |
| December | 4°C | -6°C | 3 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 40°C on 2026-07-11
- Coldest day on record: -24°C on 1988-12-29
Percentiles compare each day to Tehran, Iran's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →