Helsinki weather in October 2025

Expect 9°C daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in Helsinki in October. Check more long-term weather averages for Helsinki in October before you book your next holiday to Finland in 2025/2026.

  • 9°C maximum daytime temperature in October in Helsinki9
    9°C max day temperature
  • 3 hours of sunshine per day
  • 17 days with some rainfall in October in Helsinki17
    17 days with some rainfall
  • 3°C minimum night-time temperature in October in Helsinki3
    3°C min night temperature
  • 10 hours of daylight per day in October in Helsinki10
    10 hours of daylight per day
  • No heat & humidity in October in Helsinki0
    No heat & humidity
  • 72 mm monthly rainfall in October in Helsinki72
    72 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in October in Helsinki1
    1 (Low) UV index
  • 9°C sea temperature in October in Helsinki9
    9°C sea temperature

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The October 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)

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How warm is it in Helsinki in October?

Daytime temperatures usually reach 9°C in Helsinki in October, falling to 3°C at night.

How sunny is it in Helsinki in October?

There are normally 3 hours of bright sunshine each day in Helsinki in October - that's 26% of daylight hours.

Is the sea cold around Helsinki in October?

The average sea temperature around Helsinki in October is 9°C.

Does it rain in Helsinki in October?

There are usually 17 days with some rain in Helsinki in October and the average monthly rainfall is 72mm.

Helsinki October sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 06:26 17:52
Thursday, 16th October 2025 07:03 17:08
Friday, 31st October 2025 07:41 16:26

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