What is the warmest month in Finland?
When summer is at its warmest and how hot it usually gets.
Short answer
July is the warmest month. The Finnish Meteorological Institute says the warmest day of the year is usually around 20 July. In July 2026, the monthly mean temperature varied from about 17 to 18 °C on the south coast to about 11 to 14 °C in northern Lapland, and there were 15 days with readings above 25 °C somewhere in Finland.
Why
- FMI says the warmest day of the year is around 20 July.
- FMI reported a July 2026 monthly mean of about 17 to 18 °C on the south coast and 11 to 14 °C in northern Lapland.
- According to FMI, July 2026 had 15 heat days, one fewer than the 1991–2020 average.
Details
Lakes are usually at their warmest in late July and early August, which makes this the best time for swimming.
Tip
Book summer cottages and lake accommodation early for July, since it is the main holiday month for Finns too.
What may differ
August can be almost as warm as July and is often less crowded, while June evenings are clearly cooler.
Common misconception
June is the warmest month because it has the longest days.
What actually happens
The longest days are in June, but the warmest weather usually comes in July.
People also ask
- How hot is Finland in July?
- Is August warm in Finland?
- When is the best time to swim 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 & SeasonsRelated questions
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When does the snow melt in Finland?
Visit Finland says snow melts first on the southern coast, while Lapland keeps its snow into May.
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When does autumn start in Finland?
The Finnish Meteorological Institute says autumn begins when the daily mean temperature stays below 10 °C.
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What is the weather like in Helsinki in winter?
Visit Finland gives typical winter temperatures of -3 to -8 °C in Helsinki.
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When is the best time for skiing in Lapland?
Late winter and spring are the best time.