Istanbul Weather in October
October in Istanbul averages 20°C (68°F) during the day and 15°C (59°F) at night. Quite a bit of rainfall is typical this month, with around 79 mm (3.1 in) on average. An umbrella is a good idea.
Rainfall in Istanbul in October
The climate data from previous years indicates about 11 days of rain, averaging 79 mm (3.1 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Istanbul in October
Istanbul in October is worth a visit. The temperature is perfect, with 20°C (68°F) during the day and 15°C (59°F) at night. Conditions are often most pleasant around the middle of the day. With overnight lows of 15°C (59°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Istanbul in October
The city usually sees around 159 hours of sunlight, indicating a moderately sunny period.
Average water temperature in October
At 19°C (66°F), the water is getting there — comfortable enough for most swimmers, though those used to warmer seas may still find it a touch cool.If you favor pleasant temperatures and minimal rainfall, October is one of the best months to visit Istanbul.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Turkey, check out our Istanbul's climate page.
Istanbul Temperature in October
Min Temperature
15°C (59°F)
Max Temperature
20°C (68°F)
Water Temperature
19°C (66°F)
Chance of Rain
36%
Precipitation
79 mm (3.1 in)
Rainy days
11 days
Sunshine
159 hours
Percentage Sunshine
46%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Istanbul typically drop from around 22°C (72°F) at the start of October to approximately 17°C (63°F) by the end. Nights are cool, with lows typically ranging from 11°C (52°F) to 15°C (59°F).
Average temperatures in October
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in October
Historical weather for Istanbul in October
Browse day-by-day weather records for Istanbul spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Istanbul historical weather extremes in October
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Istanbul.
- On October 7, 1984, temperatures climbed to 34°C (93°F), marking the warmest October day on record.
- The coldest October day was on October 17, 2011, with a maximum of 9°C (48°F).
- The lowest overnight temperature recorded in October was 2°C (36°F) (October 30, 1987).
Best Places in Turkey in October
Find out more about the weather in Turkey and which places have the best travel conditions in this month. See all of Turkey in October →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Istanbul in October
Comfortable temperatures call for an easy wardrobe in October. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. With water temperatures around 19°C (66°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Istanbul in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Turkey, check out our Istanbul's climate page.
Temperature Rainfall Sunshine Water Temp
See the full Istanbul climate overview or explore weather in Turkey.
