Helsinki weather in May 2025

Expect 15°C 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.

  • 15°C maximum daytime temperature in May in Helsinki15
    15°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in May in Helsinki10
    10 days with some rainfall
  • 5°C minimum night-time temperature in May in Helsinki5
    5°C 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
  • 33 mm monthly rainfall in May in Helsinki33
    33 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in May in Helsinki4
    4 (Moderate) UV index
  • 5°C sea temperature in May in Helsinki5
    5°C sea temperature

More about Helsinki

Helsinki by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Finland

Radisson Hotels: up to 25% off prepaid rates

  • Save up to 25% on hotel stays when you book advance
  • Radisson Rewards members get extra 10% off hotels
  • Book hotels in Europe, Middle East, Africa, Asia & Pacific
Show discount codeShow discount code ******AID
Redeem Radisson Hotels discount code >>

View all Radisson Hotels offers

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 / mm)  |  Imperial (°F / inches)

Back to top

How warm is it in Helsinki in May?

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

Is the sea cold around Helsinki in May?

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

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 33mm.

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

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^