Istanbul weather in January 2027

Q: How warm is it in Istanbul in January?

Daytime temperatures usually reach 8°C in Istanbul in January, falling to 2°C at night.

Q: How sunny is it in Istanbul in January?

There are normally 5 hours of bright sunshine each day in Istanbul in January - that's 49% of daylight hours.

Q: Is the sea cold around Istanbul in January?

The average sea temperature around Istanbul in January is 8°C.

Q: Does it rain in Istanbul in January?

There are usually 19 days with some rain in Istanbul in January and the average monthly rainfall is 110mm.

Expect daytime maximum temperatures of 46°F in Istanbul, Turkey in January based on long-term weather averages. There are 5 hours of sunshine per day on average with 19 days with some rainfall and typically 4.3 inches of rainfall in the month.

46
46°F max day temperature
5
5 hours of sunshine per day
19
19 days with some rainfall
36
36°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
4.3
4.3 inches of monthly rainfall
2
2 (Low) UV index
46
46°F sea temperature

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The January 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)