The warmest month in Istanbul (İstanbul) is August, with an average high of 29.2°C and an average low of 21.5°C. The coldest month is January, with an average high of 9.3°C and an average low of 3.8°C. Between 2016 and 2025, the highest temperature recorded was 39.6°C (July 23, 2025) and the lowest was -6.6°C (March 14, 2022).
| Month | Avg. high | Avg. low | Precipitation |
|---|---|---|---|
| January | 9.3°C | 3.8°C | 106 mm |
| February | 10.4°C | 4.3°C | 73 mm |
| March | 12.8°C | 5.6°C | 74 mm |
| April | 17°C | 8.6°C | 53 mm |
| May | 21.3°C | 13.1°C | 60 mm |
| June | 26.5°C | 18.3°C | 48 mm |
| July | 29.2°C | 20.8°C | 30 mm |
| August | 29.2°C | 21.5°C | 20 mm |
| September | 25.5°C | 18°C | 43 mm |
| October | 20.2°C | 13.6°C | 58 mm |
| November | 16.2°C | 10.2°C | 85 mm |
| December | 11.6°C | 6.4°C | 96 mm |
Based on daily historical weather data 2016–2025. Weather data by Open-Meteo.com.
Explore detailed temperature patterns in Istanbul (İstanbul), Turkey (Türkiye) through interactive candlestick charts. View historical weather data with daily temperature ranges, trends, and variations. Whether you're planning a trip to Istanbul (İstanbul) or analyzing local climate patterns, our unique visualization makes temperature data easy to understand. Get insights into Istanbul (İstanbul)'s weather patterns from hourly updates to yearly historical data.