October weather forecast and climate
Istanbul, Turkey

Ships along the coast of the port city of Istanbul, Turkey, with a background view of the cityscape
Ships along the coast of the port city of Istanbul, Turkey, with a background view of the cityscape
October spreads beautiful fall colors in Istanbul with lovely temperate weather and the mercury column in the 12.8°C (55°F) to 18.9°C (66°F) range.
The first signs of the approaching wet season are apparent by mid-autumn as each passing day increases the probability of rain. The skies are mostly cloudy, and the sunlight registers for a daily 6 hours. October registers 88.9mm (3.5") of rain and occasionally invites rainstorms.
The autumn is beautiful due to the pleasant weather and the colorful landscape. Expect rain and shine in October, and keep an umbrella or raincoat ready during outdoor excursions.

What is the temperature in October in Istanbul?

In October, the average high-temperature is 19.1°C (66.4°F), and the average low-temperature is 13°C (55.4°F).

How many days does it rain in October in Istanbul?

In Istanbul, in October, it is raining for 11.2 days, with typically 87.7mm (3.5") of accumulated precipitation.

Does it snow in Istanbul in October?

In Istanbul, Turkey, in October, it doesn't snow. In November, it regularly snows.

What is the sea water temperature in October in Istanbul?

The average seawater temperature, in October, is 18.4°C (65.1°F). For swimming, a surface water temperature of 18.4°C (65.1°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
Average temperature in October - Istanbul, Turkey
  • Average high temperature in October: 19.1°C

The warmest month (with the highest average high temperature) is August (26.7°C).
The month with the lowest average high temperature is January (8.5°C).

  • Average low temperature in October: 13°C

The month with the highest average low temperature is August (20°C).
The coldest month (with the lowest average low temperature) is February (3.1°C).

Average rainfall in October - Istanbul, Turkey
  • Average rainfall in October: 87.7mm

The wettest month (with the highest rainfall) is December (122.6mm).
The driest month (with the lowest rainfall) is July (31.6mm).

Average rainfall days in October - Istanbul, Turkey
  • Average rainfall days in October: 11.2 days

The month with the highest number of rainy days is January (17.5 days).
The month with the lowest number of rainy days is July (4.2 days).

Average snowfall days in October - Istanbul, Turkey
  • Average snowfall days in October: 0 days

The month with the highest number of snowfall days is February (4.9 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

Average sea temperature in October - Istanbul, Turkey
  • Average sea temperature in October: 18.4°C

The best month for swimming (with the highest average sea temperature) is August (24.9°C).
The coldest month (with the lowest average sea temperature) is February (7.8°C).

Average daylight in October / Average sunshine in October - Istanbul, Turkey
  • Average daylight in October: 11.1h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

  • Average sunshine in October: 5.3h

The month with most sunshine is July (Average sunshine: 10.4h).
The month with least sunshine is December (Average sunshine: 2.2h).

Average UV index in October - Istanbul, Turkey
  • Average UV index in October: 4

The month with the highest UV index is July (UV index 9).
The month with the lowest UV index is December (UV index 1).

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