Helsinki weather in September 2021

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  • 14°C maximum daytime temperature in September in Helsinki14
    14°C max day temperature
  • 4 hours of sunshine per day
  • 17 days with some rainfall in September in Helsinki17
    17 days with some rainfall
  • 7°C minimum night-time temperature in September in Helsinki7
    7°C min night temperature
  • 13 hours of daylight per day in September in Helsinki13
    13 hours of daylight per day
  • No heat & humidity in September in Helsinki0
    No heat & humidity
  • 73 mm monthly rainfall in September in Helsinki73
    73 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Helsinki3
    3 (Moderate) UV index
  • 14°C sea temperature in September in Helsinki14
    14°C sea temperature

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The September weather guide for Helsinki, Finland shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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How warm is it in Helsinki in September?

Daytime temperatures usually reach 14°C in Helsinki in September, falling to 7°C at night.

How sunny is it in Helsinki in September?

There are normally 4 hours of bright sunshine each day in Helsinki in September - that's 33% of daylight hours.

How warm is the sea around Helsinki in September?

The average sea temperature around Helsinki in September is 14°C.

Does it rain in Helsinki in September?

There are usually 17 days with some rain in Helsinki in September and the average monthly rainfall is 73mm.

Helsinki sunrise & sunset times for September 2021

Browse the sunrise & sunset times for Helsinki in September 2021. Select a month to view Helsinki sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st September 2021 06:15 20:24
Wednesday, 15th September 2021 06:48 19:41
Thursday, 30th September 2021 07:24 18:55
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where is warm in Finland in September for 2021/2022?

Below are average maximum temperatures at popular destinations in Finland in September. Select a destination to see more weather parameters.

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