Istanbul weather in August
In August, Istanbul has an average high of 29 °C84 °F and an average low of 22 °C72 °F, with about 22 mm0.9 in of precipitation. August is the warmest month of the year and ranks 11th for precipitation.
How August compares with other months
Compared with July, August is about the same temperature. Compared with September, August is 3.6 °C6.4 °F warmer on average and drier by 32 mm1.3 in. Daylight lasts about 13.8 hours around the middle of the month. Average relative humidity is 66% and the average cloud amount 30%.
Is August a good time to visit Istanbul?
Yes — August is one of the most comfortable months to visit Istanbul by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in August
For Istanbul in August, pack light summer clothes such as T-shirts, shorts or light dresses.
August in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Istanbul | 2984 | 2272 | 220.9 |
| Üsküdar | 2984 | 2272 | 220.9 |
| Ümraniye | 2882 | 2169 | 281.1 |
| Küçükçekmece | 2984 | 2271 | 220.9 |
| Maltepe | 2882 | 2169 | 281.1 |
| İzmit | 3087 | 2067 | 381.5 |
| Nilüfer | 3392 | 2068 | 130.5 |
| Bursa | 3391 | 1967 | 130.5 |
| Çorlu | 3187 | 2067 | 150.6 |
Nearby places that are more than 1 °C1.8 °F warmer in August: Nilüfer; cooler: Ümraniye and Maltepe.
Other months in Istanbul
- January8 °C47 °F / 4 °C38 °F
- February9 °C49 °F / 4 °C39 °F
- March12 °C53 °F / 6 °C42 °F
- April16 °C60 °F / 9 °C48 °F
- May21 °C70 °F / 14 °C57 °F
- June26 °C79 °F / 19 °C66 °F
- July29 °C84 °F / 22 °C71 °F
- August29 °C84 °F / 22 °C72 °F
- September25 °C77 °F / 19 °C66 °F
- October20 °C68 °F / 14 °C58 °F
- November15 °C59 °F / 10 °C50 °F
- December10 °C50 °F / 6 °C42 °F
Frequently asked questions
How warm is Istanbul in August?
In August the average high in Istanbul is 29 °C (84 °F) and the average low is 22 °C (72 °F).
Does it rain a lot in Istanbul in August?
On average about 22 mm (0.9 in) of precipitation falls in August; it ranks 11th of the 12 months.
Is August the warmest month in Istanbul?
Yes. August is the warmest month in Istanbul. The coldest month is January, with an average low of 4 °C (38 °F).
How long is the day in Istanbul in August?
In the middle of August the day in Istanbul lasts about 13.8 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Istanbul in August?
The average relative humidity in August is about 66%. This is a long-term average for the whole day.
How cloudy is Istanbul in August?
On average about 30% of the sky is covered by cloud in August. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.