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This is something you might want to add to your bucket list. August is also the perfect time to visit Finland. The days are long and the temperature is amazing.
Kotka Weather in December
With daytime temperatures of 2°C (36°F) and nighttime lows of -4°C (25°F), December in Kotka brings very low temperatures during the day. Do keep in mind that quite a bit of snow/rainfall is typical. Around 69 mm (2.7 in) falls on average.
Rainfall in Kotka in December
Snow/rain is expected on roughly 21 days, totalling around 69 mm (2.7 in) for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Kotka in December
December in Kotka sees highs of 2°C (36°F) and lows of -4°C (25°F) overnight. December is known for being in the winter season. Cold conditions tend to persist from morning through evening, so be prepared for winter weather. Nights are well below freezing at -4°C (25°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. This month is characterized by its cold weather, so make sure to wear sufficient layers to stay warm.December in Kotka has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Kotka Temperature in December
Min Temperature
-4°C (25°F)
Max Temperature
2°C (36°F)
Chance of Rain
69%
Precipitation
69 mm (2.7 in)
Rainy days
21 days
Kotka Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kotka - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Kotka typically stay consistent throughout December, with daily highs averaging around 2°C (36°F). Nights are very cold, with lows typically ranging from -7°C (19°F) to -2°C (28°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather records for Kotka in December
Browse day-by-day weather records for Kotka spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kotka historical weather extremes in December
Based on 49 years of weather observations in Kotka between 1976 and 2025, these are the recorded extremes.
- The hottest December day on record in Kotka reached 9°C (48°F) (December 6, 2006).
Best Places in Finland in December
Find out more about the weather in Finland and which places have the best travel conditions in this month. See all of Finland in December →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Kotka in December
We recommend to layer up for chilly conditions in Kotka in December. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. Rain is likely on several days, so bring a good rain jacket.
What To Do in Kotka in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling2/10 -
Walking2/10 -
Barbeque1/10 -
Camping1/10 -
Outdoor sports2/10
Kotka 3-Day Forecast
More climate data for Kotka
See the full Kotka climate overview or explore weather in Finland.
Popular in December
Where to go in December - average daytime high across popular destinations.
Turku
2°C (36°F) Helsinki2°C (36°F) Tampere
0°C (32°F) Vuokatti
-3°C (27°F) Rovaniemi-4°C (25°F) Äkäslompolo-5°C (23°F) Ruka-4°C (25°F) Levi-5°C (23°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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