July is the hottest month in Lahti with an average temperature of 17°C (62°F) and the coldest is February at -7°C (19°F) with the most daily sunshine hours at 10 in June. The wettest month is August with an average of 80mm of rain. The best month to swim in the sea is in September when the average sea temperature is 24°C (75°F).
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Sunrise 08:38
Sunset 15:28
Sunrise 08:38
Sunset 15:28