July is the hottest month in Helsinki with an average temperature of 17°C (62°F) and the coldest is February at -5°C (22°F). The wettest month is August with an average of 90mm of rain. The best month to swim in the sea is in August when the average sea temperature is 13°C (55°F).
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Sunrise 09:03
Sunset 15:18
Sunrise 09:03
Sunset 15:18