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

Monthly weather forecast and climate
Istanbul, Turkey

January, like December, is a frosty winter month in Istanbul, Turkey, with average temperature varying between 8.5°C (47.3°F) and 5.3°C (41.5°F). The coldest month is January, with an average high-temperature of 8.5°C (47.3°F) and an average low-temperature of 5.3°C (41.5°F). Weather in January »

The last month of the winter, February, is also a frosty month in Istanbul, Turkey, with temperature in the range of an average high of 9.7°C (49.5°F) and an average low of 6°C (42.8°F). In Istanbul, the average high-temperature in February is essentially the same as in January - a still frosty 9.7°C (49.5°F). Weather in February »

March, the first month of the spring, in Istanbul, is a fresh month, with temperature in the range of an average low of 7.4°C (45.3°F) and an average high of 11.8°C (53.2°F). In Istanbul, the average high-temperature in March is practically the same as in February - a cool 11.8°C (53.2°F). Weather in March »

April in Istanbul, Turkey, is a moderate spring month, with average temperature fluctuating between 15.3°C (59.5°F) and 9.9°C (49.8°F). In Istanbul, the average high-temperature marginally rises, from a cool 11.8°C (53.2°F) in March, to a moderate 15.3°C (59.5°F). Weather in April »

May, the last month of the spring, in Istanbul, is an agreeable month, with average temperature ranging between max 20.9°C (69.6°F) and min 15.1°C (59.2°F). In Istanbul, the average high-temperature in May rises, from a moderate 15.3°C (59.5°F) in April, to a pleasant 20.9°C (69.6°F). Weather in May »

June, the first month of the summer, in Istanbul, is a warm month, with average temperature fluctuating between 25.4°C (77.7°F) and 20°C (68°F). In Istanbul, the average high-temperature slightly increases, from a pleasant 20.9°C (69.6°F) in May, to a moderately hot 25.4°C (77.7°F). Weather in June »

July, the same as June, is a moderately hot summer month in Istanbul, Turkey, with average temperature fluctuating between 22.3°C (72.1°F) and 27.9°C (82.2°F). With an average high-temperature of 27.9°C (82.2°F) and an average low-temperature of 22.3°C (72.1°F), July is the warmest month. The average heat index is calculated to a tropical 30.1°C (86.2°F). Weather in July »

August, the last month of the summer, in Istanbul, is another warm month, with average temperature fluctuating between 23.3°C (73.9°F) and 27.8°C (82°F). In August, the average high-temperature is essentially the same as in July - a still moderately hot 27.8°C (82°F). Weather in August »

The first month of the autumn, September, is still a warm month in Istanbul, Turkey, with temperature in the range of an average high of 24.3°C (75.7°F) and an average low of 20.4°C (68.7°F). In Istanbul, the average high-temperature in September slightly decreases, from 27.8°C (82°F) in August, to a still warm 24.3°C (75.7°F). Weather in September »

October, the same as September, is another enjoyable autumn month in Istanbul, Turkey, with average temperature varying between 15.5°C (59.9°F) and 19.4°C (66.9°F). In October, the average high-temperature marginally drops, from a moderately hot 24.3°C (75.7°F) in September, to an enjoyable 19.4°C (66.9°F). Weather in October »

The last month of the autumn, November, is another mild month in Istanbul, Turkey, with average temperature varying between 12.5°C (54.5°F) and 15.4°C (59.7°F). In Istanbul, the average high-temperature slightly decreases, from a comfortable 19.4°C (66.9°F) in October, to a moderate 15.4°C (59.7°F). Weather in November »

The first month of the winter, December, is also a fresh month in Istanbul, Turkey, with average temperature fluctuating between 7.7°C (45.9°F) and 10.7°C (51.3°F). In December, the average high-temperature slightly decreases, from a mild 15.4°C (59.7°F) in November, to a cool 10.7°C (51.3°F). Weather in December »

What is the coldest month in Istanbul?

January is the coldest month, with an average high-temperature of 8.5°C (47.3°F) and an average low-temperature of 5.3°C (41.5°F).

How many days does it rain in Istanbul?

Throughout the year, in Istanbul, Turkey, there are 130.7 rainfall days, and 400mm (15.75") of precipitation is accumulated.

When does it snow in Istanbul?

January through March and December are months with snowfall in Istanbul, Turkey.

How much does it snow in Istanbul?

In Istanbul, during the entire year, snow falls for 7.1 days, and aggregates up to 49mm (1.93") of snow.

When does it snow the most in Istanbul?

January is the month with the most snowfall in Istanbul. Snow falls for 3.7 days and accumulates 24mm (0.94") of snow.

What is the month with the lowest UV index in Istanbul?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Istanbul.

What is the most humid month in Istanbul?

February is the most humid month in Istanbul, Turkey, with an average relative humidity of 78%.

When is the sea coldest in Istanbul?

February is the month with the coldest seawater in Istanbul, with an average sea temperature of 7.8°C (46°F).

When it does not snow in Istanbul?

April through November are months without snowfall in Istanbul, Turkey.

What is the least humid month in Istanbul?

Months with the lowest humidity are June and July, with an average relative humidity of 67%.

When are the longest days in Istanbul?

June has the longest days of the year in Istanbul, with an average of 15.1h of daylight.

What is the warmest month in Istanbul?

The warmest month in Istanbul is July, with an average high-temperature of 27.9°C (82.2°F) and an average low-temperature of 22.3°C (72.1°F).

What month has the most sunshine in Istanbul?

The month with the most sunshine in Istanbul, Turkey, is July, with an average of 11.8h of sunshine.

When is the highest UV index in Istanbul?

The month with the highest UV index in Istanbul is July, with an average maximum UV index of 7.

What is the driest month in Istanbul?

August is the month with the least rainfall. Rain falls for 3.8 days and accumulates 11mm (0.43") of precipitation.

When is the sea warmest in Istanbul?

With an average sea temperature of 24.9°C (76.8°F), August is the month with the warmest seawater in Istanbul.

What is the wettest month in Istanbul?

December is the month with the most rainfall in Istanbul, Turkey. Rain falls for 13.6 days and accumulates 52mm (2.05") of precipitation.

What is the month with the shortest days in Istanbul?

The month with the shortest days in Istanbul is December, with an average of 9.3h of daylight.

What is the month with the least sunshine in Istanbul?

With an average of 4.8h of sunshine, December has the least sunshine of the year.
Average temperature - Istanbul, Turkey
Average humidity - Istanbul, Turkey
Average rainfall - Istanbul, Turkey
Average rainfall days - Istanbul, Turkey

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 - Istanbul, Turkey

The month with the highest snowfall is January (24mm).
Months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

Average snowfall days - Istanbul, Turkey

The month with the highest number of snowfall days is January (3.7 days).
Months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average sea temperature - Istanbul, Turkey

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 / Average sunshine - Istanbul, Turkey

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

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is December (Average sunshine: 4.8h).