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    Are there thunderstorms in Finland?

    How common thunderstorms are and what to do if you are outdoors.

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    Short answer

    Thunderstorms happen mainly in summer, usually on warm afternoons. The Finnish Meteorological Institute says inland areas have 8 to 14 thunderstorm days per summer, and coastal areas and northern Lapland 4 to 8. In an average July about 54,300 cloud-to-ground lightning strikes are recorded across Finland.

    Weather & Seasons

    Why

    1. FMI gives 8 to 14 thunderstorm days per summer inland and 4 to 8 in coastal areas and northern Lapland.
    2. FMI says the 1991–2020 average for July is 54,300 cloud-to-ground lightning strikes.
    3. In July 2026, FMI reported less lightning than usual.

    Details

    Storms are usually short but can bring heavy rain, hail and strong gusts. Lakes and open fells are exposed places during lightning.

    Tip

    If you hear thunder while swimming or boating, get out of the water and off the lake right away.

    What may differ

    FMI issues thunderstorm warnings in its weather service and app, which are worth checking before a lake or fell trip.

    Common misconception

    Finland is too cold for thunderstorms.

    What actually happens

    Warm summer days regularly produce thunderstorms, especially inland.

    People also ask

    • When is thunderstorm season in Finland?
    • Is it safe to swim during a thunderstorm?
    • Does it hail in Finland?

    Sources

    This answer is for reference only. Weather varies a lot from year to year, so check the forecast of the Finnish Meteorological Institute before you travel.

    Weather & Seasons
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