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    North Turkey

    Istanbul weather in May

    North Turkey

    Istanbul weather in May


    21 °C


    12 °C


    15 °C


    34 mm

    in month

    Rainy days

    6 days

    in month


    14 hours



    10 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
    Data backed by 40 years of history

    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 Istanbul in May, the average air temperature ranges from 21.3 °C (70.3 °F) during the day to 12.3 °C (54.1 °F) at night. There are 6 days of rain on average, where the rainfall is 34 mm (1.33 in).

    Are there good conditions to visit in May in Istanbul?

    In May in Istanbul, there are ideal conditions for a vacation. There are only 6 days of rain in the whole month, so you can leave your umbrella at home. There are some people, who may feel a slight chill at 21.3 °C (70.3 °F), but others will feel perfectly fine. The temperature of 12.3 °C (54.1 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.

    What is the sea temperature in May in Istanbul?

    The sea will reach 15.1 °C (59.2 °F) in Istanbul in May. This is a sea temperature for resilient people only, most people won't enjoy swimming in such cold water or will have to use a wetsuit for water activities.

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

    The average daily temperature in Istanbul in May is 21.3 °C (70.3 °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.

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

    There are 6 days, which are rainy in May in Istanbul, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 1.4 days of the week, or in general - 20 % days.

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

    The average night temperature in Istanbul in May is 12.3 °C (54.1 °F). Nights can be cooler, morning running can be refreshing but choose appropriate clothing, evening outdoor sitting can be pleasant but you can also be cold.

    How many hours of sun to expect in Istanbul in May?

    There is an average length of sunshine of 10 hours per day in May in Istanbul.

    What is the humidity in May in Istanbul?

    In Istanbul in May, expect humidity around 75 %.

    Is there a dry season in May in Istanbul?

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

    Is Istanbul rainier in May than in June?

    No, May in Istanbul is not a rainier month than June.

    What is the temperature trend in Istanbul in May?

    Over the course of May in Istanbul, the temperatures are rising from 19.0 °C (66.1 °F) at the beginning of the month to 23.7 °C (74.6 °F) at the end of the month.

    How windy is Istanbul in May?

    An average wind scale that can be expected in May in Istanbul is 2.5. 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 May?

    The sea temperature during May in Istanbul has an increasing tendency from 12.7 °C (54.9 °F) at the beginning of the month to 17.8 °C (64.0 °F) at the end of the month.

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

    The length of daylight in May in Istanbul is 14 hours.