Istanbul in December
The weather in December
In December, Istanbul averages daytime highs of 11° and night-time lows of 6° — cool weather by day. Expect around 123 mm of precipitation spread over about 14 wet days, with average cloud cover near 49%.
Days are 4.4° cooler than in November on average, and January is cooler again by about 2°. The sea averages 12°, too cold for most swimmers.
December scores 23/100 — poor conditions for sightseeing — and ranks 10th of the twelve months for Istanbul. For the most comfortable weather, consider May, June and September instead.
Around the middle of the month the sun rises at 08:23 and sets at 17:37 local time, giving 9 h 15 min of daylight. Days shorten by 12 minutes over the month.
Why 23/100?
How the score for December is builtBeach score this month: 10/100 (adds sea temperature and heat).
Comfort peaks for daytime highs between 18° and 25°C (64–77°F).
Around Istanbul this month
Zeytinburnu
Türkiye's best in December
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Adana
Istanbul in December: quick answers
Is December a good time to visit Istanbul?
December scores 23/100 for Istanbul, which we rate as poor. Average highs are 11°C with 14 wet days.
How warm is Istanbul in December?
Daytime highs average 11°C and night-time lows 6°C in December.
Does it rain a lot in Istanbul in December?
Istanbul receives about 123 mm of precipitation in December, falling on around 14 days.
Can you swim in Istanbul in December?
The sea averages 12°C in December, cold for most swimmers.