The Istanbul historical weather page is built for travel planning and destination comparison, covering monthly temperature, rainfall, rainy days, and sunshine trends from 2015 through the latest complete month. Best time to visit Istanbul. Searches for the best time to visit Istanbul usually need monthly temperature, rainfall, and rainy-day context. Use the month-by-month view to find comfortable travel windows instead of relying only on annual averages. Istanbul average temperature by month. For queries such as Istanbul weather in April, Istanbul temperature in August, or Istanbul historical rainfall, start with the monthly pattern and then compare specific years when timing matters. How to read Istanbul weather patterns. Istanbul, Türkiye sits in a temperate climate band. Check the full monthly range because the warmer season (June to August) and cooler season (December to February) can feel very different for travel planning. Istanbul rainfall and seasonality. For outdoor plans in Istanbul, compare both total rainfall and rainy days by month. Shoulder periods (March-May and September-November) are useful for balancing temperature comfort, rainfall risk, and travel demand. When to compare Istanbul with other destinations. If you are choosing between several cities, compare Istanbul with nearby destinations in the same month. This avoids relying only on annual averages and makes temperature and precipitation differences clearer.
Istanbul Historical Weather Since 2015 | Latest Complete Month Data
Istanbul historical weather from 2015 through the latest complete month: monthly temperature, rainfall, sunshine, yearly comparisons, and travel timing references. The Istanbul historical weather page is built for travel planning and destination comparison, covering monthly temperature, rainfall, rainy days, and sunshine trends from 2015 through the latest complete month. Best time to visit Istanbul. Searches for the best time to visit Istanbul usually need monthly temperature, rainfall, and rainy-day context. Use the month-by-month view to find comfortable travel windows instead of relying only on annual averages. Istanbul average temperature by month. For queries such as Istanbul weather in April, Istanbul temperature in August, or Istanbul historical rainfall, start with the monthly pattern and then compare specific years when timing matters. How to read Istanbul weather patterns. Istanbul, Türkiye sits in a temperate climate band. Check the full monthly range because the warmer season (June to August) and cooler season (December to February) can feel very different for travel planning. Istanbul rainfall and seasonality. For outdoor plans in Istanbul, compare both total rainfall and rainy days by month. Shoulder periods (March-May and September-November) are useful for balancing temperature comfort, rainfall risk, and travel demand. When to compare Istanbul with other destinations. If you are choosing between several cities, compare Istanbul with nearby destinations in the same month. This avoids relying only on annual averages and makes temperature and precipitation differences clearer. Istanbul historical weather from 2015 through the latest complete month: monthly temperature, rainfall, sunshine, yearly comparisons, and travel timing references.
Istanbul monthly fact table
These facts are generated from historical monthly averages for 2015-01-01/2026-05-31, ready for best-month, rainy-season, hottest-month, and coldest-month answers.
- Recommended month: August
- Hottest month: August
- Coldest month: January
- Rainiest month: January
| Month | Avg Temp | Precip | Rainy Days | Sunshine |
|---|
| January | 6.6°C | 109 mm | 17.3 | 5.5 h |
| February | 7.2°C | 79 mm | 15.5 | 6.7 h |
| March | 8.8°C | 79 mm | 15.8 | 7.7 h |
| April | 12.3°C | 55 mm | 12.8 | 10.2 h |
| May | 17.1°C | 57 mm | 14 | 11.7 h |
| June | 22.1°C | 46 mm | 10.9 | 13 h |
| July | 24.8°C | 28 mm | 7.9 | 13.5 h |
| August | 25°C | 18 mm | 7.8 | 12.6 h |
| September | 21.6°C | 47 mm | 11.6 | 10.8 h |
| October | 16.6°C | 63 mm | 12.4 | 8.4 h |
| November | 13°C | 81 mm | 12.5 | 7.1 h |
| December | 8.8°C | 90 mm | 16.4 | 5.6 h |
Source: Open-Meteo Archive; generated: 2026-06-07.
Istanbul historical weather travel guide
When is the best time to visit Istanbul?
Based on historical monthly averages for 2015-01-01/2026-05-31, the recommended month for Istanbul is August, with an average temperature around 25.0°C, average precipitation around 18 mm, and a travel comfort score of 100.
Is it hot in Istanbul in summer?
The hottest month in Istanbul historical averages is August, with an average temperature around 25.0°C and an average high around 29.1°C. For summer trips, check rainfall and heat precautions together.
When is the rainy season in Istanbul?
Rain is most concentrated in Istanbul during January, November, December. The rainiest month is January, with average precipitation around 109 mm and about 17.3 rainy days.
What is the coldest month in Istanbul?
The coldest month in Istanbul historical averages is January, with an average temperature around 6.6°C and an average low around 3.9°C. Prepare warm clothing for winter travel.