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Istanbul Monthly Climate Averages
Istanbul is situated in Mediterranean climate zone that typically has warm or hot summer with mild rains and soft but rainy winter.
To help you choose the best time to travel, you can find climate data below on the weather in Istanbul .
Month | t°C day |
t°C night |
mm rain |
daylight |
January | +8.5 | +3.2 | 105 | 10.1h |
February | +9.1 | +3.1 | 77 | 11.1h |
March | +10.8 | +4.2 | 72 | 12.4h |
April | +15.4 | +7.7 | 45 | 13.8h |
May | +20 | +12.1 | 34 | 15h |
June | +24.5 | +16.5 | 34 | 15.6h |
July | +26.5 | +19.5 | 32 | 15.3h |
August | +26.7 | +20 | 40 | 14.2h |
September | +23.6 | +16.8 | 58 | 12.9h |
October | +19.1 | +13 | 88 | 11.5h |
November | +14.7 | +8.9 | 101 | 10.4h |
December | +10.8 | +5.5 | 123 | 9.8h |
Best time with the soft weather for the sightseeing and long walks in Istanbul are May, June, September.
Temperature in Istanbul
The table shows that the hottest months in Istanbul are August and July, during which the average daytime temperature reaches +26.7°C and the nighttime temperature falls to +20°C.
The coldest months are January and February, when the daily average temperature falls to +8.5°C, and drops to +3.2°C during the night.
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Sea temperature
The month with the highest average monthly temperature in the Sea of Marmara on the beaches of Istanbul is August with 25 degrees.
The coldest water can be found in February — 8degrees C.
Precipitation
The largest amount of precipitation falls on average in December and January, up to 123mm, and the least in July and June — up to 32mm.