Istanbul weather in October 2026

Q: How hot is it in Istanbul in October?

Daytime temperatures usually reach 19°C in Istanbul in October, falling to 12°C at night.

Q: How sunny is it in Istanbul in October?

There are normally 6 hours of bright sunshine each day in Istanbul in October - that's 57% of daylight hours.

Q: How warm is the sea around Istanbul in October?

The average sea temperature around Istanbul in October is 18°C.

Q: Does it rain in Istanbul in October?

There are usually 12 days with some rain in Istanbul in October and the average monthly rainfall is 76mm.

Expect daytime maximum temperatures of 66°F in Istanbul, Turkey in October based on long-term weather averages. There are 6 hours of sunshine per day on average with 12 days with some rainfall and typically 3.0 inches of rainfall in the month.

66
66°F max day temperature
6
6 hours of sunshine per day
12
12 days with some rainfall
54
54°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
3.0
3.0 inches of monthly rainfall
4
4 (Moderate) UV index
64
64°F sea temperature

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The October weather guide for Turkey (Istanbul) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)