Istanbul weather

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Usually in August
- 27
- 18
- 10
Weather by month
Now Today
- 31
- 10
5-day forecast

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The weather guide for Istanbul, Turkey shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

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Which is the hottest month in Istanbul?

The hottest time of year in Istanbul is normally July. Expect maximum daytime temperatures to reach 27°C with low heat and humidity.

Which month has the most rain in Istanbul?

In terms of rainfall, December is usually the wettest month in Istanbul with 126mm on average. There are normally 18 days in December with some rain.

When is it sunniest in Istanbul?

The sunniest time of year in Istanbul is normally July with bright sunshine on average for 79% of daylight hours; that's 12 hours of sunshine per day.

When is the sea warmest in Istanbul?

The sea is usually at its warmest in Istanbul in August when the water temperature reaches 24°C.

Metric (°C / mm) | Imperial (°F / inches)

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Compare Istanbul weather with the USA

Below the Istanbul weather chart shows average maximum daytime temperature for Istanbul, Turkey and the USA (Washington).

Maximum daytime temperature (°C)

Istanbul, Turkey

USA (Washington)

Jan

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May

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Aug

Sep

Oct

Nov

Dec