Weather in December
Concluding the year,
December brings the onset of winter in
Kotka, with drastically reduced daylight hours and plummeting sea temperatures. The sea temperatures sink to 3.3°C (37.9°F), a stark difference from the warmth of the summer months. The city, once vibrant with the colors of the myriad seasons, is now covered in a blanket of white. December’s weather reiterates the harsh, snowy winters characteristic of Kotka,
Finland.
Sea temperature
In December, the average sea temperature in Kotka is 3.3°C (37.9°F).
Note: In the activity of swimming, this state poses an instant danger to life. Breathing control is completely lost, impeding any form of clear thinking. Employing a specialized swimsuit is crucial to minimize thermal loss.
Daylight
December has the shortest days of the year in Kotka, Finland, with an average of 5h and 54min of daylight.
On the first day of December in Kotka, Finland, sunrise is at 08:51 and sunset at 15:10. On the last day of the month, sunrise is at 09:18 and sunset at 15:11 EET.
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