Weather in Istanbul in October 2025
Average weather
Average temperature in Istanbul in October
Going from a maximum of +77°F during the day to a minimum of +57°F during the night, the temperature in October averages around +72°F.
The average maximum temperature goes down 9% by the end of the month, compared with the beginning of the month, from +72°F to +70°F.
Is Istanbul warm or cold in October?
Istanbul is typically mild in October.
Maximum temperatures go down compared to the previous month from +75°F to +66°F. The minimum temperature also goes down from +66°F to +57°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how October is compared to other months in Istanbul:
Water temperature in Istanbul in October
Water in Istanbul in October is Fresh. It varies from +60°F to +71°F, with an average of +66°F. This is almost similar to the air temperature, which averages +66°F.
In October, water temperatures are average relative to the rest of the year:
Can you swim in Istanbul in October?
Climate in Istanbul in October
| September | October | November | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +75°F | +66°F | +59°F | ||||
| Min. temperature | ||||||
| +54°F | +41°F | +34°F | ||||
| Max. temperature | ||||||
| +97°F | +88°F | +81°F | ||||
| Rainfall | ||||||
| 31 mm | 57 mm | 69 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +73°F | +66°F | +58°F | ||||
| Humidity | ||||||
| 67% | 73% | 75% | ||||
| Air pressure | ||||||
| 1015 HPa | 1018 HPa | 1018 HPa | ||||
| Sunny days | ||||||
| 17 | 12 | 9 | ||||
| Cloudy days | ||||||
| 5 | 8 | 8 | ||||
| Rainy days | ||||||
| 6 | 10 | 12 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
October typically has worse weather conditions compared to September. It’s getting colder in October. From +75°F in the day, the average maximum temperature lowers to +66°F. Prepare for more rain. Average rainfall goes from 31 mm to 57 mm. Humidity rises from 67% to 73%. The average wind speed doesn’t change much during October, staying around 3 m/s. The days becoming less sunny, going from 17 sunny days in September to 12 in October.
Next month (November) brings a further decline in the weather.
Wind
The average wind speed is 4 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Istanbul is gradually decreasing during October, going from 5 m/s to 2 m/s over the course of the month.
Rain
How was the weather last October in Istanbul?
Climate Change Over the Years
The climate in Istanbul in October has not changed that much over the last 43 years.
The average temperature was the lowest in 1997 (+61°F) and the highest in 2019 (+68°F). The driest year was 1984 with only 361 mm of rainfall, and the wettest year was 2010 with 859 mm.
FAQ
Is October a good time to visit Istanbul?
Can you sunbathe in Istanbul in October?
Can you swim in Istanbul in October?
Is Istanbul rainy in October?
Is it sunny in Istanbul in October?
Other cities in Turkey
Monthly weather in Istanbul
Source of the data
For this page, we’ve looked at the typical weather in Istanbul, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.