Istanbul weather in October 2025

Expect 19°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Istanbul in October. Check more long-term weather averages for Istanbul in October before you book your next holiday to Turkey in 2025/2026.

  • 19°C maximum daytime temperature in October in Istanbul19
    19°C max day temperature
  • 6 hours of sunshine per day
  • 12 days with some rainfall in October in Istanbul12
    12 days with some rainfall
  • 12°C minimum night-time temperature in October in Istanbul12
    12°C min night temperature
  • 11 hours of daylight per day in October in Istanbul11
    11 hours of daylight per day
  • No heat & humidity in October in Istanbul0
    No heat & humidity
  • 76 mm monthly rainfall in October in Istanbul76
    76 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in October in Istanbul4
    4 (Moderate) UV index
  • 18°C sea temperature in October in Istanbul18
    18°C 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 / mm)  |  Imperial (°F / inches)

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More about Turkey

How hot is it in Istanbul in October?

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

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.

How warm is the sea around Istanbul in October?

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

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.

Istanbul October sunrise & sunset times

Browse the sunrise and sunset times for Istanbul in October 2025. Select a month to view Istanbul sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 07:01 18:46
Thursday, 16th October 2025 07:17 18:22
Friday, 31st October 2025 07:34 18:01

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