Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
In Istanbul, the average high-temperature in December slightly decreases from a moderate 15.4°C (59.7°F) in November to a cool 10.7°C (51.3°F). The average low-temperature, in December, is 7.7°C (45.9°F).Humidity
In Istanbul, Turkey, the average relative humidity in December is 74%.Rainfall
December is the month with the most rainfall in Istanbul. Rain falls for 13.6 days and accumulates 52mm (2.05") of precipitation.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows in Istanbul, Turkey. Throughout December, in the average 0.9 snowfall days, it receives 7mm (0.28") of snow. In Istanbul, during the entire year, snow falls for 7.1 days and aggregates up to 49mm (1.93") of snow.Sea temperature
In Istanbul, the average seawater temperature in December is 10.7°C (51.3°F).Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.
Daylight
The month with the shortest days is December, with an average of 9h and 17min of daylight.On the first day of December in Istanbul, sunrise is at 08:09 and sunset at 17:36. On the last day of the month, sunrise is at 08:28 and sunset at 17:45 +03.
Sunshine
The month with the least sunshine in Istanbul is December, with an average of 4.8h of sunshine.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The daily maximum UV index of 2 in December interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
FAQ
What is the temperature in December in Istanbul?
What is the average humidity in December in Istanbul?
What is the rainiest month in Istanbul?
How much does it rain in Istanbul in December?
When does it start snowing in Istanbul?
What is the water temperature in December in Istanbul?
What is the month with the shortest days in Istanbul?
How many hours of daylight does Istanbul have in December?
When are sunrise and sunset in December in Istanbul?
What is the month with the least sunshine in Istanbul?
How many hours of sunshine does Istanbul have in December?
When is the lowest UV index in Istanbul?
What is the UV index intensity in December in Istanbul?
Average temperature in December
Istanbul, Turkey
- Average high temperature in December: 10.7°C
The warmest month (with the highest average high temperature) is July (27.9°C).
The month with the lowest average high temperature is January (8.5°C).
- Average low temperature in December: 7.7°C
The month with the highest average low temperature is August (23.3°C).
The coldest month (with the lowest average low temperature) is January (5.3°C).
Average pressure in December
Istanbul, Turkey
- Average pressure in December: 1019.7mbar
The month with the highest atmospheric pressure is December (1019.7mbar).
The month with the lowest atmospheric pressure is July (1011.7mbar).
Average wind speed in December
Istanbul, Turkey
- Average wind speed in December: 18.8km/h
The windiest month (with the highest average wind speed) is August (20.5km/h).
The calmest month (with the lowest average wind speed) is May (14km/h).
Average humidity in December
Istanbul, Turkey
- Average humidity in December: 74%
The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are June and July (67%).
Average rainfall in December
Istanbul, Turkey
- Average rainfall in December: 52mm
The wettest month (with the highest rainfall) is December (52mm).
The driest month (with the least rainfall) is August (11mm).
Average rainfall days in December
Istanbul, Turkey
- Average rainfall days in December: 13.6 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is August (3.8 days).
Average snowfall in December
Istanbul, Turkey
- Average snowfall in December: 7mm
The month with the highest snowfall is January (24mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Istanbul, Turkey
- Average snowfall days in December: 0.9 days
The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in December
Istanbul, Turkey
- Average sea temperature in December: 10.7°C
The best month for swimming (with the highest average sea temperature) is August (24.9°C).
The coldest month (with the lowest average sea temperature) is February (7.8°C).
Average daylight in December /
Average sunshine in December
Istanbul, Turkey
- Average daylight in December: 9h and 17min
The month with the longest days is June (Average daylight: 15h and 5min).
The month with the shortest days is December (Average daylight: 9h and 17min).
- Average sunshine in December: 4h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in December
Istanbul, Turkey
- Average sunshine days in December: 14.7 days
The month with the most sunshine days is August (25.5 days).
The month with the least sunshine days is February (12.6 days).
Average UV index in December
Istanbul, Turkey
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Istanbul, Turkey
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in December
Istanbul, Turkey
- Average visibility in December: 10km
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January and February (9km).
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