Istanbul, Turkey climate
Average temperatures, precipitation and all-time records for Istanbul, Turkey, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is August, averaging a high of 27°C, and its coldest is February, with an average low of 5°C.
Istanbul is the largest city in Turkey, constituting the country's economic, cultural, and historical center. With a population of over 15 million, it is home to 18% of the population of Turkey. Istanbul is among the largest cities in Europe and in the world by population. via Wikipedia
Istanbul average temperatures by month
Typical daily high and low, and average precipitation, for each month in Istanbul, Turkey, based on 1980–2026 records. The wettest month is January (3 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 8°C | 5°C | 3 mm |
| February | 8°C | 5°C | 3 mm |
| March | 10°C | 6°C | 3 mm |
| April | 14°C | 9°C | 3 mm |
| May | 19°C | 13°C | 0 mm |
| June | 24°C | 19°C | 0 mm |
| July | 27°C | 21°C | 0 mm |
| August | 27°C | 22°C | 0 mm |
| September | 24°C | 19°C | 3 mm |
| October | 19°C | 15°C | 3 mm |
| November | 14°C | 11°C | 3 mm |
| December | 10°C | 7°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: 34°C on 2025-07-23
- Coldest day on record: -5°C on 1985-02-19
Percentiles compare each day to Istanbul, Turkey'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 →