Helsinki weather in May 2025

Expect 59°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Helsinki in May. Check more long-term weather averages for Helsinki in May before you book your next holiday to Finland in 2025/2026.

  • 59°F maximum daytime temperature in May in Helsinki59
    59°F max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in May in Helsinki10
    10 days with some rainfall
  • 41°F minimum night-time temperature in May in Helsinki41
    41°F min night temperature
  • 17 hours of daylight per day in May in Helsinki17
    17 hours of daylight per day
  • No heat & humidity in May in Helsinki0
    No heat & humidity
  • 1.3 inches monthly rainfall in May in Helsinki1.3
    1.3 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in May in Helsinki4
    4 (Moderate) UV index
  • 41°F sea temperature in May in Helsinki41
    41°F sea temperature

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Expires at 23:59 on Tuesday 3rd Dec 2024

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.

Metric (°C)  |  Imperial (°F)

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How warm is it in Helsinki in May?

Daytime temperatures usually reach 59°F in Helsinki in May, falling to 41°F at night.

How sunny is it in Helsinki in May?

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

How warm is the sea around Helsinki in May?

The average sea temperature around Helsinki in May is 41°F.

Does it rain in Helsinki in May?

There are usually 10 days with some rain in Helsinki in May and the average monthly rainfall is 1.3 inches.

Helsinki May sunrise & sunset times

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

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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