Finland weather in September 2021

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

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The September weather guide for 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 Finland in September?

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

How sunny is it in Finland in September?

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

How warm is the sea around Finland in September?

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

Does it rain in Finland in September?

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

Metric (°C / mm)  |  Imperial (°F / inches)

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Finland sunrise & sunset times for September 2021

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


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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