Porvoo Weather in December
Porvoo in December sees very low daytime temperatures of 2°C (36°F) and nighttime lows of -4°C (25°F). Rainfall is fairly high this month at around 62 mm (2.4 in), so pack a rain jacket to stay dry.
Rainfall in Porvoo in December
Past climate data indicates that roughly 20 days will see snow/rain, totalling around 62 mm (2.4 in) for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Porvoo in December
December in Porvoo brings very low temperatures, with highs of 2°C (36°F) and nights around -4°C (25°F). This month falls in the winter season. Cold conditions tend to persist from morning through evening, so be prepared for winter weather. With lows of -4°C (25°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated. With the coldest weather of the year, this month demands extra warmth. Be sure to layer up to stay comfortable.
Sunshine in Porvoo in December
The city usually sees around 30 hours of sunlight, indicating fewer sunny days.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Porvoo. Our weather planner can help you explore destinations with more pleasant weather conditions.
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 Porvoo's climate page.
Porvoo Temperature in December
Min Temperature
-4°C (25°F)
Max Temperature
2°C (36°F)
Chance of Rain
66%
Precipitation
62 mm (2.4 in)
Rainy days
20 days
Humidity
89% *
Sunshine
30 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Porvoo 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 -3°C (27°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 for Porvoo in December
Browse day-by-day weather records for Porvoo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Porvoo historical weather extremes in December
Based on 49 years of weather observations in Porvoo between 1976 and 2025, these are the recorded extremes.
- The warmest day in December was on December 20, 2015, with a maximum of 10°C (50°F).
- Peak precipitation in December occurred on December 12, 1979, when 37 mm (1.5 in) of precipitation was measured.
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
What to Wear in Porvoo in December
We recommend to layer up for chilly conditions in Porvoo 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 Porvoo 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 Porvoo's climate page.
Temperature Rainfall Sunshine Humidity
See the full Porvoo climate overview or explore weather in Finland.
