Istanbul weather in December 2025
Istanbul weather in December 2025
Day
11 °C
Night
5 °C
Sea
11 °C
Precipitation
109 mm
in month
Rainy days
12 days
in month
Daylight
9 hours
average
Sunshine
4 hours
average
Humidity
79 %
Day
11 °C
Night
5 °C
Sea
11 °C
Precipitation
109 mm
in month
Rainy days
12 days
in month
Daylight
9 hours
average
Sunshine
4 hours
average
Humidity
79 %
Overview: Istanbul
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We make the most from 40 years of historical weather data to predict the best weather conditions.Weather overview for Istanbul
Weather overview
In December in Istanbul, the average air temperature ranges from 11 °C (51 °F) during the day to 5 °C (42 °F) at night. There are 12 days of rain on average, where the rainfall is 109 mm (4.29 in).
Is December a good month to visit Istanbul?
In December there are not good conditions to visit Istanbul. A relatively low temperature of 11 °C (51 °F) may be ideal for walking or outdoor activities, but some people may have a different idea of the holiday. The night temperature of 5 °C (42 °F) is not inviting for evening and night activities except for visiting a bar and having beer or two.
What is the temperature in Istanbul during the day in December?
The average daily temperature in December in Istanbul is 11 °C (51 °F). Don't forget a sweater and light or normal jacket, but also pack light clothing in case the temperatures are above average. The weather at this time can be somewhat changeable and a wide range of clothing can become handy.
How many rainy days can I expect in Istanbul in December?
In December in Istanbul, we can expect 12 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.9 days of the week, or in general - 41 % days.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.What is the rainfall intensity in Istanbul in December?
There is precipitation of 109 mm (4.29 in) in December in Istanbul, which means 4 mm (0.14 in) rainfall per day on average.
How many hours of sun to expect in December in Istanbul?
There is an average length of sunshine of 4 hours per day in Istanbul in December.
Is December part of the wet season in Istanbul?
No, there is no wet season in December in Istanbul - you can expect 12 days of rain during the month.
How long is the day (from dawn till dusk) in Istanbul in December?
The length of daylight in December in Istanbul is 9 hours.
We make the most from 40 years of historical weather data to predict the best weather conditions.How windy is it in Istanbul in December?
An average wind scale that can be expected in December in Istanbul is 3.
Is Istanbul rainier in December than in January?
No, December in Istanbul is not a rainier month than January.
How does the sea temperature evolve during the month in Istanbul in December?
Istanbul has a decreasing trend of the sea temperature during December - from 13 °C (55 °F) in the first days of the month to 10 °C (49 °F) in the last days of the month.
How humid is Istanbul in December?
Humidity in December in Istanbul is 79 %.
Is the temperature rising or falling in the course of time in Istanbul in December?
During December in Istanbul, the day temperatures are decreasing - from 13 °C (55 °F) at the beginning of the month to 10 °C (50 °F) at the end of the month.