Finland weather in August 2025

Expect 20°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Finland in August. Check more long-term weather averages for Finland in August before you book your next holiday to Finland in 2025/2026.

  • 20°C maximum daytime temperature in August in Finland (Helsinki)20
    20°C max day temperature
  • 7 hours of sunshine per day
  • 16 days with some rainfall in August in Finland (Helsinki)16
    16 days with some rainfall
  • 11°C minimum night-time temperature in August in Finland (Helsinki)11
    11°C min night temperature
  • 16 hours of daylight per day in August in Finland (Helsinki)16
    16 hours of daylight per day
  • No heat & humidity in August in Finland (Helsinki)0
    No heat & humidity
  • 77 mm monthly rainfall in August in Finland (Helsinki)77
    77 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in August in Finland (Helsinki)4
    4 (Moderate) UV index
  • 16°C sea temperature in August in Finland (Helsinki)16
    16°C sea temperature

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The August 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 August. Select a holiday destination to see more weather parameters.

All Finland destinations

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

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How hot is it in Finland in August?

Daytime temperatures usually reach 20°C in Helsinki, Finland in August, falling to 11°C at night.

How sunny is it in Finland in August?

There are normally 7 hours of bright sunshine each day in Helsinki, Finland in August - that's 42% of daylight hours.

How warm is the sea around Finland in August?

The average sea temperature around Helsinki, Finland in August is 16°C.

Does it rain in Finland in August?

There are usually 16 days with some rain in Helsinki, Finland in August and the average monthly rainfall is 77mm.

Finland August sunrise & sunset times

Browse the sunrise and sunset times for Finland in August 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
Friday, 1st August 2025 04:00 20:51
Saturday, 16th August 2025 04:36 20:11
Sunday, 31st August 2025 05:12 19:27

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