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    How often are there heat waves in Finland?

    How many hot days a typical summer brings and where.

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    Short answer

    Days above 25 °C, called hellepäivä in Finnish, happen every summer. The Finnish Meteorological Institute says inland southern and central Finland gets 10 to 15 such days per summer, and the north and coast 5 to 10. In July alone, the 1991–2020 average was 16 days with a heat reading somewhere in Finland.

    Weather & Seasons

    Why

    1. FMI says inland southern and central Finland has 10 to 15 heat days above 25 °C per summer.
    2. According to FMI, the north and coastal areas have 5 to 10 heat days per summer.
    3. FMI reported that July 2026 had 15 heat days, compared with a 1991–2020 July average of 16.

    Details

    Many Finnish homes, trains and older hotels have no air conditioning. On hot nights rooms can stay warm, especially in city centres.

    Tip

    If heat bothers you, ask whether your hotel room has air conditioning when you book for July.

    What may differ

    The number of hot days varies widely. Some summers have very few, others several weeks of heat.

    Common misconception

    Air conditioning is standard everywhere in Finland.

    What actually happens

    Many buildings lack it because hot days are relatively few, so heat waves can feel uncomfortable indoors.

    People also ask

    • How hot does it get in Helsinki?
    • Do Finnish hotels have air conditioning?
    • What is a heat day 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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