Seinäjoki Weather in December
December in Seinäjoki brings very low temperatures, with highs of 0°C (32°F) and nights dropping to -6°C (21°F). Expect some snow/rainfall, with around 48 mm (1.9 in) typical for the month.
Rainfall in Seinäjoki in December
Climate statistics over the past 30 years suggest around 20 days of snow/rain, with 48 mm (1.9 in) average 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 Seinäjoki in December
In December, Seinäjoki gets very low temperatures, with highs of 0°C (32°F). Nights cool to around -6°C (21°F). The winter season is characteristic of December. It stays very cold throughout much of the day, so warm winter clothing is essential. 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. This month is particularly chilly, so wearing layers is necessary to stay warm and comfortable.
Sunshine in Seinäjoki in December
The area sees fewer sunny days, with a projection of about 19 hours of sunshine. This reduced sunlight makes it ideal for those who prefer overcast conditions over bright sunny days.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Seinäjoki. 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 Seinäjoki's climate page.
Seinäjoki Temperature in December
Min Temperature
-6°C (21°F)
Max Temperature
0°C (32°F)
Chance of Rain
68%
Precipitation
48 mm (1.9 in)
Rainy days
20 days
Sunshine
19 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Seinäjoki typically drop from around -1°C (30°F) at the start of December to approximately -4°C (25°F) by the end. 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
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 Seinäjoki in December
Browse day-by-day weather records for Seinäjoki spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Seinäjoki historical weather extremes in December
The extremes listed below come from historical weather data collected in Seinäjoki from 1976 through 2025.
- The warmest day in December was on December 12, 2004, with a maximum of 11°C (52°F).
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 Seinäjoki in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Rain gear is recommended, you can expect wet weather on multiple days. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.What To Do in Seinäjoki 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 Seinäjoki's climate page.
See the full Seinäjoki climate overview or explore weather in Finland.
