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Helsinki — weather December, water temperature

By months January February March April May June July August September October November December
1.1°C Daytime temperatures -0.1°C Night temperatures 3 Sunny days 5.8-6.4 Sun (hours) 4 Rainy days 61.7 mm Precipitation 3.8°C water temperature
Air temperature
2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012
The maximum daily temperature 8°C — 6 December 2015.
The maximum night temperature 8°C — 6 December 2015.
The minimum daily temperature -11.5°C — 7 December 2021.
The minimum night temperature -13°C — 8 December 2021.
water temperature
2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012
The warmest water 6.3 °C — 3 December 2020. The coldest water 0.7 °C — 27 December 2021.
Sunny, cloudy and gloomy days
Precipitation, mm
Maximum precipitation 64.4 mm — August. Minimum precipitation 35.8 mm — April.
Wind speed, km / h
Maximum wind speed 21.1 km / h — December. Minimum wind speed 14.4 km / h — May.
Number of hours of sunshine
The maximum number of hours of sunshine per day 12.1 h. — June. The minimum number of hours of sunshine per day 1.6 h. — December.
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