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Istanbul Weather and Climate: A Comprehensive Guide

During winter months (January and December) Istanbul can experience heavy snowfall, but most of winter it has a pleasant average temperature temperature of around 15°C.

Istanbul can best be visited in spring (May and June) or autumn (September and October) with temperatures between 22°C and 30°C. During summer it tends to be to hot to visit the city with average temperatures between 30°C and 35°C.

Throughout the year Istanbul is very windy.

Average maximum day and minimum night temperature

In Istanbul, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 29°C in August to a chilly 10°C in February.

Nighttime temperatures can drop, with average lows reaching 5°C in February. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

On average, Istanbul receives a reasonable amount of rainfall, with an annual precipitation of 730 mm. The seasons in Istanbul, bring significant changes in precipitation. The wettest month, December, receives high rainfall, with an average of 103 mm of precipitation. This rainfall is distributed across 17 rainy days.

In contrast, the driest month, August, experiences much less rainfall, totaling 24 mm over 5 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Istanbul Precipitation page.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

In Istanbul, summer days are longer and more sunny, with daily sunshine hours peaking at 10.6 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 2.0 hours per average day. Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Average water temperature

The mean water temperature over the year ranges from 8°C in February to 25°C in July.

Water temperature over the year

Forecast for Istanbul

Wed   Jan 15
8°C | 5°C
NE 7 m/s
16 mm
overcast and heavy rain

overcast and heavy rain

Thu   Jan 16
8°C | 4°C
NE 6 m/s
broken clouds and no rain

broken clouds and no rain

Fri   Jan 17
9°C | 4°C
NE 5 m/s
almost clear and no rain

almost clear and no rain

Select a Month of Interest

Check the conditions for any month of the year.

The best time of year to visit Istanbul in Turkey

During the months of May, June, September and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in Istanbul?
    The hottest season / summer takes place in June, July, August and September.
  • Which is the warmest month in Istanbul?
    August has an average maximum temperature of 29°C and is the warmest month of the year.
  • Which is the coldest month in Istanbul?
    The coldest month is February with an average maximum temperature of 10°C.
  • Which is the wettest month in Istanbul?
    December tops the wettest month list with 103 mm of rainfall.
  • Which is the driest month in Istanbul?
    August is the driest month with 24 mm of precipitation.
  • Which is the sunniest month in Istanbul?
    July is the sunniest month with an average of 318 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.