August weather forecast
Istanbul, Turkey

Ships along the coast of the city port of Istanbul, Turkey
Ships along the coast of the city port of Istanbul, Turkey

Weather in August

August, the last month of the summer in Istanbul, is another warm month, with an average temperature varying between 27.8°C (82°F) and 23.3°C (73.9°F).

Temperature

In Istanbul, the average high-temperature in August is practically the same as in July - a still moderately hot 27.8°C (82°F). In Istanbul, the average low-temperature is 23.3°C (73.9°F).

Heat index

In August, the average heat index is appraised at a hot 30°C (86°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like activity, wind, differences in body mass, height, and shape, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in August is 68%.

Rainfall

The month with the least rainfall is August, when the rain falls for 3.8 days and typically collects 11mm (0.43") of precipitation.

Snowfall

In Istanbul, snow does not fall in April through November.

Sea temperature

The month with the warmest seawater in Istanbul, Turkey, is August, with an average sea temperature of 24.9°C (76.8°F).
Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 24.9°C (76.8°F).

Daylight

In Istanbul, the average length of the day in August is 13h and 46min.
On the first day of August, sunrise is at 05:59 and sunset at 20:21. On the last day of the month, sunrise is at 06:29 and sunset at 19:39 +03.

Sunshine

The average sunshine in August in Istanbul is 9.7h.

UV index

The average daily maximum UV index in August in Istanbul is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in August in Istanbul?

In August, the average high-temperature is 27.8°C (82°F), and the average low-temperature is 23.3°C (73.9°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is appraised at 30°C (86°F).

What is the average humidity in August in Istanbul?

The average relative humidity in August is 68%.

What is the driest month in Istanbul?

The month with the least rainfall in Istanbul is August, when the rain falls for 3.8 days and typically collects 11mm (0.43") of precipitation.

How many days does it rain in August in Istanbul?

In August, in Istanbul, the rain falls for 3.8 days. Throughout August, 11mm (0.43") of precipitation is accumulated.

When it does not snow in Istanbul?

April through November are months without snowfall in Istanbul.

What month 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, Turkey.

How warm is the water in August in Istanbul?

In Istanbul, Turkey, the average seawater temperature in August is 24.9°C (76.8°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.9°C (76.8°F) water.

What is the average length of the day in August in Istanbul?

In Istanbul, Turkey, the average day length in August is 13h and 46min.

When are sunrise and sunset in August in Istanbul?

On the first day of August in Istanbul, sunrise is at 05:59 and sunset at 20:21. On the last day of the month, sunrise is at 06:29 and sunset at 19:39 +03.

How many hours of sunshine does Istanbul have in August?

The average sunshine duration in August is 9.7h.

What is the UV index intensity in August in Istanbul?

In August, the average daily maximum UV index in Istanbul is 6. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in August
Istanbul, Turkey

Average temperature in August - Istanbul, Turkey
  • Average high temperature in August: 27.8°C

The warmest month (with the highest average high temperature) is July (27.9°C).
The month with the lowest average high temperature is January (8.5°C).

  • Average low temperature in August: 23.3°C

The month with the highest average low temperature is August (23.3°C).
The coldest month (with the lowest average low temperature) is January (5.3°C).

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Average pressure in August
Istanbul, Turkey

Average pressure in August - Istanbul, Turkey
  • Average pressure in August: 1013mbar

The month with the highest atmospheric pressure is December (1019.7mbar).
The month with the lowest atmospheric pressure is July (1011.7mbar).

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Average wind speed in August
Istanbul, Turkey

Average wind speed in August - Istanbul, Turkey
  • Average wind speed in August: 20.5km/h

The windiest month (with the highest average wind speed) is August (20.5km/h).
The calmest month (with the lowest average wind speed) is May (14km/h).

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Average humidity in August
Istanbul, Turkey

Average humidity in August - Istanbul, Turkey
  • Average humidity in August: 68%

The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are June and July (67%).

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Average rainfall in August
Istanbul, Turkey

Average rainfall in August - Istanbul, Turkey
  • Average rainfall in August: 11mm

The wettest month (with the highest rainfall) is December (52mm).
The driest month (with the least rainfall) is August (11mm).

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Average rainfall days in August
Istanbul, Turkey

Average rainfall days in August - Istanbul, Turkey
  • Average rainfall days in August: 3.8 days

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).

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Average snowfall in August
Istanbul, Turkey

Average snowfall in August - Istanbul, Turkey
  • Average snowfall in August: 0mm

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

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Average snowfall days in August
Istanbul, Turkey

Average snowfall days in August - Istanbul, Turkey
  • Average snowfall days in August: 0 days

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

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Average sea temperature in August
Istanbul, Turkey

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).

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Average daylight in August /
Average sunshine in August
Istanbul, Turkey

Average daylight in August / Average sunshine in August - Istanbul, Turkey
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 9h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).

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Average sunshine days in August
Istanbul, Turkey

Average sunshine days in August - Istanbul, Turkey
  • Average sunshine days in August: 25.5 days

The month with the most sunshine days is August (25.5 days).
The month with the least sunshine days is February (12.6 days).

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Average UV index in August
Istanbul, Turkey

Average UV index in August - Istanbul, Turkey
  • Average UV index in August: 6

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).

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Average cloud cover in August
Istanbul, Turkey

Average cloud cover in August - Istanbul, Turkey
  • Average cloud cover in August: 12

The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and August (Cloud cover 12).

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Average visibility in August
Istanbul, Turkey

Average visibility in August - Istanbul, Turkey
  • Average visibility in August: 10km

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January and February (9km).

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