Istanbul
Turkey
Long-term weather forecast
Long-term weather forecast
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April 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
April brings the fresh aroma of spring to Istanbul with relatively drier days. The days warm up to the extent that the daily highs are usually above 12.8°C (55°F), while the nights rarely drop below 4.4°C (39.9°F). The average temperatures remain in the mild range of 7.8°C (46°F) to 15.6°C (60.1°F) as the clouds start to clear from the skyline.
The moderately intense sunshine lasts for 6.5 hours as the daylight surges to 13 hours. April sees only 45.7mm (1.8") of rain with no sign of ice or snow.
Tourist numbers increase in Istanbul with an increase in warmth.
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  • The average high temperature in April: 15.4°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 April: 7.7°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 April: 44.9mm

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 April: 10.4 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 April: 0 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 April: 10.3°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 April: 13h

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 April: 6h

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 April: 5

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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