Finland weather in May 2025

Expect 15°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Finland in May. Check more long-term weather averages for Finland in May before you book your next holiday to Finland in 2025/2026.

  • 15°C maximum daytime temperature in May in Finland (Helsinki)15
    15°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in May in Finland (Helsinki)10
    10 days with some rainfall
  • 5°C minimum night-time temperature in May in Finland (Helsinki)5
    5°C min night temperature
  • 17 hours of daylight per day in May in Finland (Helsinki)17
    17 hours of daylight per day
  • No heat & humidity in May in Finland (Helsinki)0
    No heat & humidity
  • 33 mm monthly rainfall in May in Finland (Helsinki)33
    33 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in May in Finland (Helsinki)4
    4 (Moderate) UV index
  • 5°C sea temperature in May in Finland (Helsinki)5
    5°C sea temperature

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The May weather guide for Finland (Helsinki) 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.

Top Finland destinations

Below are average maximum temperatures at popular countries, regions and places in Finland in May. Select a holiday destination to see more weather parameters.

All Finland destinations

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

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How warm is it in Finland in May?

Daytime temperatures usually reach 15°C in Helsinki, Finland in May, falling to 5°C at night.

How sunny is it in Finland in May?

There are normally 8 hours of bright sunshine each day in Helsinki, Finland in May - that's 48% of daylight hours.

Is the sea cold around Finland in May?

The average sea temperature around Helsinki, Finland in May is 5°C.

Does it rain in Finland in May?

There are usually 10 days with some rain in Helsinki, Finland in May and the average monthly rainfall is 33mm.

Finland May sunrise & sunset times

Browse the sunrise and sunset times for Finland in May 2025. Select a month to view Finland sunrise and sunset times for the next 12 months. The Finland sunrise and sunset times shown below are for Helsinki.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:17 20:19
Friday, 16th May 2025 03:39 20:56
Saturday, 31st May 2025 03:09 21:28

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