Jämsä in December
3.6out of 10
Not the best time
Cold: highs around -2°C. Frequent rain: about 11 rainy days.
-2°CAvg high
-6°CAvg low
11Rainy days (46 mm)
4:50 hDaylight
09:50Sunrise · 14:40 Sunset
Why this score
- Cold: highs around -2°C
- Frequent rain: about 11 rainy days
- Nights fall to about -6°C
- Rain varies a lot between years (±4.5 days)
What to wear and pack
- Winter coat, hat and scarf
- Rain jacket or compact umbrella
- Gloves for freezing mornings
How reliable is the forecast?
Rain in December varies a lot between years (±4.5 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -4°C | -9°C | 39 mm | 10 | – | – | 3.7 |
| February | -4°C | -10°C | 30 mm | 8 | – | – | 4.0 |
| March | 1°C | -7°C | 31 mm | 8 | – | – | 4.0 |
| April | 7°C | -2°C | 32 mm | 8 | – | – | 5.3 |
| May | 14°C | 3°C | 42 mm | 9 | – | – | 6.6 |
| June | 19°C | 9°C | 67 mm | 12 | – | – | 7.0 |
| July | 21°C | 12°C | 78 mm | 13 | – | – | 7.3 |
| August | 19°C | 11°C | 74 mm | 13 | – | – | 7.0 |
| September | 14°C | 7°C | 56 mm | 11 | – | – | 6.4 |
| October | 7°C | 3°C | 60 mm | 11 | – | – | 5.1 |
| November | 2°C | -1°C | 50 mm | 11 | – | – | 4.1 |
| December | -2°C | -6°C | 46 mm | 11 | – | – | 3.6 |
Frequently asked questions
How hot is Jämsä in December?
Daytime highs average -2°C and nights about -6°C.
When is the best time to visit Jämsä?
The best months are July, June, August.