Istanbul weather in October
October in Istanbul: nice, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Istanbul · #154 of 604 destinations to visit in October · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Istanbul climate normals — October
| Daytime high | 21°C / 69°F | 😎 nice |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 19°C / 66°F | |
| Rainfall | 39 mm / 1.5 in | 🌦 some rain |
| Rainy days | 6 days | |
| Humidity | 73% | 💧 humid |
| Dew point | 13°C / 55°F | |
| Sunshine | 8.6 h/day | |
| Daylight | 11.1 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 50 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Istanbul in October — FAQ
- Is October a good time to visit Istanbul?
- October in Istanbul: nice, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Istanbul on SeasonMap's comfort score (85/100).
- What is the weather like in Istanbul in October?
- In October, Istanbul averages a daily high of 20.5°C and a low of 15.5°C, with about 39.2 mm of rain over roughly 6.4 rainy days.
- What is the air quality in Istanbul in October?
- Istanbul has a mean US Air Quality Index of about 50 in October.