Naantali Weather in December
December in Naantali brings low temperatures, with daytime highs of 3°C (37°F) and nights around -2°C (28°F). Quite a bit of snow/rainfall is expected, around 66 mm (2.6 in), so pack an umbrella.
Rainfall in Naantali in December
The climate data from previous years indicates about 20 days of snow/rain, averaging 66 mm (2.6 in) for the month. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.
Temperature in Naantali in December
In December, Naantali gets low temperatures, with highs of 3°C (37°F). Nights cool to around -2°C (28°F). The winter season takes place during December. Cold conditions tend to persist from morning through evening, so be prepared for winter weather. With overnight lows of -2°C (28°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold. This month is characterized by its cold weather, so make sure to wear sufficient layers to stay warm.
Sunshine in Naantali in December
This month is characterized by fewer sunny days, with about 28 hours of sunshine. It's great for those who appreciate cooler, less sunny days.December in Naantali 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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Finland, check out our Naantali's climate page.
Naantali Temperature in December
Min Temperature
-2°C (28°F)
Max Temperature
3°C (37°F)
Chance of Rain
68%
Precipitation
66 mm (2.6 in)
Rainy days
20 days
Sunshine
28 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Naantali typically stay consistent throughout December, with daily highs averaging around 3°C (37°F). Nights are very cold, with lows typically ranging from -6°C (21°F) to -2°C (28°F).
Average temperatures in December
Historical weather for Naantali in December
Browse day-by-day weather records for Naantali spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Naantali historical weather extremes in December
Based on 41 years of weather observations in Naantali between 1984 and 2025, these are the recorded extremes.
- On December 20, 2015, temperatures climbed to 10°C (50°F), marking the warmest December day on record.
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
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What to Wear in Naantali in December
We recommend to layer up for chilly conditions in Naantali 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. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.What To Do in Naantali in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Finland, check out our Naantali's climate page.
See the full Naantali climate overview or explore weather in Finland.
