İstanbul Weather in October
What's the weather like in İstanbul (Istanbul) in October 2025?
The climate in İstanbul during October can be summarized as mild and reasonably dry.
October is in the fall / autumn in İstanbul and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 19°C (67°F), whilst at night 12°C (53°F) is normal.
| Daytime temperature | 19.2°C 66.6°F |
|---|---|
| Nightly temperature | 11.8°C 53.2°F |
| Average temperature | 15.5°C 59.9°F |
| Daily sunshine | 7 hrs |
| Avg rainfall | 76 mm 3 ins |
| Rainy days | 11 days |
| Sea temperature | 18.8°C 65.8°F |
| Humidity | 76% |
| Windspeed | 11.5kph 7 mph |
On average October is the 4th wettest month of the year in İstanbul with around 76mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 7 hours of sunshine per day.
October temperatures in İstanbul
October rainfall
October hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in İstanbul in October 2025.
Other monthly averages
Best places to visit in October
İstanbul weather stats
| Hottest month: | August | 26.8°C 80.2°F |
|---|---|---|
| Driest month: | July | 25mm 1ins |
| Sunniest month: | July | 12.7hrs |
| Coldest month: | January | 8°C 46.4°F |
| Wettest month: | December | 126mm 5ins |
© Google
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