Istanbul
Turkey
Long-term weather forecast
Long-term weather forecast
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January weather forecast and Climate
Istanbul, Turkey

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Ships along the coast of the port city of Istanbul, Turkey, with a background view of the cityscape
Ships along the coast of the port city of Istanbul, Turkey, with a background view of the cityscape
January is the coldest month of the year in Istanbul, with mostly cloudy and dark skies. The sunshine is at a premium at the peak of the winter, with the sun barely in the sky for a daily 3 hours.
The mercury column drops low to register an average low temperature of 3.3°C (37.9°F). The average high is 8.3°C (46.9°F), and a few days may even see freezing temperatures at 0°C (32°F).
January has the most number of rainy days in a month at 17, and the rainfall, which is icy at times, records 104.1mm (4.1"). Expect foggy mornings, which may last until the afternoon.
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  • The average high temperature in January: 8.5°C

The warmest month (with the highest average high temperature) is August (26.7°C).
The month with the lowest average high temperature is January (8.5°C).

  • The average low temperature in January: 3.2°C

The month with the highest average low temperature is August (20°C).
The coldest month (with the lowest average low temperature) is February (3.1°C).

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  • The average rainfall in January: 105.3mm

The wettest month (with the highest rainfall) is December (122.6mm).
The driest month (with the lowest rainfall) is July (31.6mm).

  • The average rainfall days in January: 17.5 days

The month with the highest number of rainy days is January (17.5 days).
The month with the lowest number of rainy days is July (4.2 days).

  • The average snowfall days in January: 3.6 days

The month with the highest number of snowfall days is February (4.9 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

  • The average sea temperature in January: 8.4°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).

  • The average daylight in January: 10h

Months with the longest days are June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • The average sunshine in January: 2.3h

The month with most sunshine is July (Average sunshine: 10.4h).
The month with least sunshine is December (Average sunshine: 2.2h).

  • The average UV index in January: 2

The month with the highest UV index is July (UV index 9).
The month with the lowest UV index is December (UV index 1).

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