Istanbul
Turkey
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
Istanbul, Turkey

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.

What is the temperature in April in Istanbul?

The average high-temperature, in April, in Istanbul, is 15.4°C (59.7°F), while the average low-temperature is 7.7°C (45.9°F).

How many days does it rain in April in Istanbul?

In Istanbul, Turkey, during April, the rain falls for 10.4 days and regularly aggregates up to 44.9mm (1.8") of precipitation.

Does it snow in Istanbul in April?

In April, in Istanbul, Turkey, it doesn't snow. March is the latest month when it typically snows.

When it does not snow in Istanbul?

April through October are months without snowfall in Istanbul.

What is the water temperature in April in Istanbul?

In April, the average sea temperature in Istanbul, Turkey, is 10.3°C (50.5°F). Swimming in 10.3°C (50.5°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Istanbul have in April?

In April, the average length of the day is 13.3h.

How long on average sun shines in April in Istanbul?

In Istanbul, the average sunshine in April is 6h.

What is the UV index reading in April in Istanbul?

The average daily maximum UV index in April is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in April - Istanbul, Turkey
  • 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).

  • 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).

Average rainfall in April - Istanbul, Turkey
  • 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).

Average rainfall days in April - Istanbul, Turkey
  • 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).

Average snowfall days in April - Istanbul, Turkey
  • 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).

Average sea temperature in April - Istanbul, Turkey
  • 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).

Average daylight in April / Average sunshine in April - Istanbul, Turkey
  • Average daylight in April: 13.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

  • 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).

Average UV index in April - Istanbul, Turkey
  • 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).