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    North Turkey

    Istanbul weather in September

    North Turkey

    Istanbul weather in September


    24 °C


    16 °C


    22 °C


    51 mm

    in month

    Rainy days

    6 days

    in month


    12 hours



    9 hours



    75 %

    Weather charts for Istanbul

    JanFebMarAprMayJunJulAugSepOctNovDecTemperature (° C)051015202530Precipitation (mm)0120
    Weather overview
    JanFebMarAprMayJunJulAugSepOctNovDecTemperature (° C)051015202530Precipitation (mm)0120
    Wet days chart
    JanFebMarAprMayJunJulAugSepOctNovDecWet days024681012141651015
    Sunhours per day chart
    JanFebMarAprMayJunJulAugSepOctNovDecSunhours per day024681012142468101214
    Wind chart
    Humidity chart
    JanFebMarAprMayJunJulAugSepOctNovDecHumidity %65707580856570758085
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    We make the most from 40 years of historical weather data to predict the best weather conditions.

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    Architecture in Istanbul at sunset time
    Architecture in Istanbul at dawn
    Architecture in Istanbul in sunny weather with few clouds

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    Weather overview and FAQs

    Weather overview

    In September in Istanbul, the average air temperature ranges from 24.3 °C (75.7 °F) during the day to 16.2 °C (61.2 °F) at night. There are 6 days of rain on average, where the rainfall is 51 mm (2.02 in).

    Is September a good month to visit Istanbul?

    September is the best month to visit Istanbul. The daily temperatures in this month reach pleasant 24.3 °C (75.7 °F). The seawater temperature reaches ideal 22.1 °C (71.8 °F). There are only 6 days of rain in the whole month, so you can leave your umbrella at home. The temperature of 16.2 °C (61.2 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.

    What temperature can I expect during the day in September in Istanbul?

    The average daily temperature in September in Istanbul is 24.3 °C (75.7 °F). A comfortable temperature for most people, where it is neither too cold nor too hot, and a large number of activities can be carried out comfortably, including sunbathing by the water. Lighter clothing will be suitable - shorts, skirts, t-shirts, jackets; a light sweater and long trousers may also be useful.

    What is the sea temperature in Istanbul in September?

    The temperature of the sea in Istanbul in September is 22.1 °C (71.8 °F). This warm sea is nice for swimming, maybe cold for some, but most people can spend a long time in it.

    How many sunny hours can I expect in Istanbul in September?

    There is an average length of sunshine of 9 hours per day in September in Istanbul.

    How many days of precipitation on average can I expect in September in Istanbul?

    In September in Istanbul, we can expect 6 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 1.3 days of the week, or in general - 19 % days.

    Is September part of the dry season in Istanbul?

    Yes, there is a dry season in September in Istanbul with just 6 days during the month being rainy.

    What is the air temperature in September in Istanbul at night?

    The average night temperature in Istanbul in September is 16.2 °C (61.2 °F). This temperature is pleasant for a wide range of evening, night, and morning activities from sports to sitting outside in restaurants or evening walks.

    Is the sea in Istanbul warmer in September than in August?

    No, the sea temperature in Istanbul in September is not higher than in August.

    Is Istanbul rainier in September than in August?

    Yes, Istanbul is a rainier September than in August.

    Is the weather in Istanbul warmer in September than in October?

    Yes, September in Istanbul is warmer than October by 5.0 °C (41.0 °F).

    Is the temperature rising or falling in the course of time in September in Istanbul?

    During September in Istanbul, the day temperatures are decreasing - from 26.1 °C (78.9 °F) at the beginning of the month to 21.8 °C (71.2 °F) at the end of the month.

    How long is the day (from dawn till dusk) in Istanbul in September?

    The length of daylight in Istanbul in September is 12 hours.

    How windy is it in September in Istanbul?

    An average wind scale that can be expected in September in Istanbul is 2.6. It is rather a milder or unnoticeable wind, therefore it will not bother you during your holiday.

    How does the sea temperature evolve during the month in Istanbul in September?

    Istanbul has a decreasing trend of the sea temperature during September - from 23.1 °C (73.6 °F) in the first days of the month to 20.3 °C (68.6 °F) in the last days of the month.

    How humid is Istanbul in September?

    In Istanbul in September, expect humidity around 75 %.