August 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
August is usually the hottest month in Istanbul, with an average high temperature of 26.7°C (80.1°F). The maritime influence on the city does not allow the city to bake in the sunlight, and it is rare for the temperatures to cross 32.2°C (90°F).
The humidity drops post morning, and the weather is hot and dry in the absence of significant rainfall. The ocean water temperature in the Bosporus strait is the warmest of the year at 25°C (77°F), while the shores down south are a little warmer.
Light summer clothing is sufficient in August to keep cool in the hot summer.

What is the warmest month in Istanbul?

With an average high-temperature of 26.7°C (80.1°F) and an average low-temperature of 20°C (68°F), August is the warmest month in Istanbul.

What is the average temperature in August in Istanbul?

In August, in Istanbul, Turkey, the average high-temperature is 26.7°C (80.1°F), and the average low-temperature is 20°C (68°F).
Average temperature in August - Istanbul, Turkey
  • Average high temperature in August: 26.7°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 August: 20°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 August - Istanbul, Turkey
  • Average rainfall in August: 39.8mm

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 August - Istanbul, Turkey
  • Average rainfall days in August: 4.9 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 August - Istanbul, Turkey
  • Average snowfall days in August: 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 August - Istanbul, Turkey
  • Average sea temperature in August: 24.9°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 August / Average sunshine in August - Istanbul, Turkey
  • Average daylight in August: 13.8h

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 August: 9.5h

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 August - Istanbul, Turkey
  • Average UV index in August: 8

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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