Jämsä Weather in December
In Jämsä, December brings very low daytime temperatures around 0°C (32°F), with nights cooling to -6°C (21°F). Some snowfall is to be expected.
Rainfall in Jämsä in December
This month experiences about 22 days of snow according to historical data, averaging 56 mm (2.2 in). This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.
Temperature in Jämsä in December
In December, Jämsä sees very low temperatures, with highs of 0°C (32°F). Nights drop to around -6°C (21°F). December is typically considered a winter month. Even daytime conditions remain cold, making layers, a warm coat, and winter accessories a good idea. Nights drop below freezing to -6°C (21°F). An extra blanket is worth packing if you're unsure about the heating where you're staying. As one of the coldest months, it's important to layer up to stay warm. Don't let the chill catch you off-guard.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Jämsä. 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 Jämsä's climate page.
Jämsä Temperature in December
Min Temperature
-6°C (21°F)
Max Temperature
0°C (32°F)
Chance of Rain
74%
Precipitation
56 mm (2.2 in)
Rainy days
22 days
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Jämsä typically stay consistent throughout December, with daily highs averaging around 0°C (32°F). Nights are very cold, with lows typically ranging from -10°C (14°F) to -5°C (23°F).
Average temperatures in December
Daily Historical Precipitation
49-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 Jämsä in December
Browse day-by-day weather records for Jämsä spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Jämsä historical weather extremes in December
Based on weather observations in Jämsä between 1999 and 2025, these are the recorded extremes during December.
- The hottest December day on record in Jämsä reached 10°C (50°F) (December 20, 2015).
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 Jämsä in December
We recommend you pack up your warm winter gear for Jämsä in December. If you have insulated boots, thermal layers, and a heavy winter coat that can handle snow and freezing temperatures it's smart to bring them. Don't forget gloves, a warm hat, and a scarf. Rain is likely on several days, so bring a good rain jacket.What To Do in Jämsä 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 Jämsä's climate page.
See the full Jämsä climate overview or explore weather in Finland.
