Istanbul weather in December 2025

Expect daytime maximum temperatures of 52°F in Istanbul, Turkey in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 18 days with some rainfall and typically 5.0 inches of rainfall in the month.

  • 52°F maximum daytime temperature in December in Istanbul52
    52°F max day temperature
  • 4 hours of sunshine per day
  • 18 days with some rainfall in December in Istanbul18
    18 days with some rainfall
  • 41°F minimum night-time temperature in December in Istanbul41
    41°F min night temperature
  • 9 hours of daylight per day in December in Istanbul9
    9 hours of daylight per day
  • No heat & humidity in December in Istanbul0
    No heat & humidity
  • 5.0 inches monthly rainfall in December in Istanbul5.0
    5.0 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Istanbul1
    1 (Low) UV index
  • 50°F sea temperature in December in Istanbul50
    50°F sea temperature

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The December 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)

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How warm is it in Istanbul in December?

Daytime temperatures usually reach 52°F in Istanbul in December, falling to 41°F at night.

How sunny is it in Istanbul in December?

There are normally 4 hours of bright sunshine each day in Istanbul in December - that's 46% of daylight hours.

How warm is the sea around Istanbul in December?

The average sea temperature around Istanbul in December is 50°F.

Does it rain in Istanbul in December?

There are usually 18 days with some rain in Istanbul in December and the average monthly rainfall is 5.0 inches.

Istanbul December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 08:10 17:37
Tuesday, 16th December 2025 08:23 17:37
Wednesday, 31st December 2025 08:29 17:46

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