Istanbul Weather in August
Turkey · Mediterranean climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
August in Istanbul sees average temperatures ranging from a low of 21.3°C (70.3°F) to a high of 29.8°C (85.6°F), with a mean of 25.2°C (77.4°F). Compared to the annual average of 15.3°C (59.5°F), this month is 9.9°C warmer than the yearly norm. This is the hottest month of the year, reaching 29.8°C (85.6°F) on average. Precipitation averages 19.7mm, making it approximately 44.0mm drier than the monthly average of 64.0mm. This is the driest month of the year, with just 19.7mm of precipitation. The city receives an average of 12.6 hours of sunshine per day during August, with relative humidity averaging 70.8%. Wind speeds reach an average maximum of 23.9 km/h. For travelers, this month offers a hottest month of the year experience in Istanbul, with drier-than-average conditions compared to the rest of the year.
Istanbul is a city where you can wake up sweating and need a jacket by sunset. I packed for August heat once and froze on a Bosphorus ferry at 9pm. Layers are essential — even summer evenings dip to 19°C with wind off the water. Pack a scarf (useful for mosques anyway). My favorite window is late September to October: 22°C, low humidity, fewer tourists at the Hagia Sophia. Skip February — cold rain, grey skies, many outdoor cafés shuttered. April brings tulip season and the city reawakens.
August vs Adjacent Months
| Metric | July | August | September |
|---|---|---|---|
| Mean Temp | 24.9°C (76.8°F) | 25.2°C (77.4°F) | 21.5°C (70.7°F) |
| Rainfall | 33.5mm | 19.7mm | 47.0mm |
| Sunshine | 13.5 hrs | 12.6 hrs | 11.0 hrs |
| Humidity | 70.1% | 70.8% | 71.3% |
| Wind | 24.0 km/h | 23.9 km/h | 22.4 km/h |
| Rainy Days | 8.8 | 8.0 | 12.8 |
Seasonal Context
August falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Istanbul in August, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Istanbul in August?
The average temperature in Istanbul during August ranges from 21.3°C (70.3°F) to 29.8°C (85.6°F), with a mean of 25.2°C (77.4°F).
How much does it rain in Istanbul in August?
Istanbul receives an average of 19.7mm of precipitation in August, spread across approximately 8.0 rainy days. This is the driest month of the year.
What should I pack for Istanbul in August?
Based on August weather data, pack lightweight, breathable clothing, sunscreen, and a hat.
Is August a good time to visit Istanbul?
August is a good time to visit Istanbul, with comfortable temperatures and manageable rainfall. However, it is the hottest month — consider early morning or evening activities.
Other Months for Istanbul
Cities with Similar August Climate (Mediterranean)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 41.01°, 28.98°. Timezone: Europe/Istanbul. Last updated: 2026-07-30.