Trondheim
December
Weather in Trondheim for December 2025
Your guide to Trondheim weather in December - trends and predictions
Snow Avalanche Warning - See hour by hour.
Trondheim is transformed into a snow paradise in December, with more than 20 snowy days on average.
According to Trondheim snow forecast for December 2025, 1 snowy day is expected until the end of the month at Monday, 29 December.So far, December 2025 in Trondheim shows a warmer trend than usual by 2.9 °C.
The forecast for the upcoming days in Trondheim predicts a temperature of 0.9 °C, which is slightly above the historical average.
In general, the average temperature in Trondheim at the beginning of December is -2.4 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of -2.7 °C by the end of December.
Official Weather Alert ⚠️
Snow Forecast ❄️
Temperatures
8
Dry days
2
Rainy days
21
Snow days
-2°/-7°
Temperatures
16 km/h
Avg max wind
85 %
Avg humidity
Trondheim Weather December
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Temperatures trend during December in Trondheim
See the weather trend as well as the moving average line
December weather in Trondheim day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Dec. |  Overcast | -2° /-6° | 0.3 mm | 0.2 cm | |
| 2 Dec. |  Partly cloudy | 0° /-7° | 2.1 mm | 0.8 cm | |
| 3 Dec. | Partly cloudy | -3° /-7° | 0.9 mm | 0.6 cm | |
| 4 Dec. | Partly cloudy | -4° /-8° | 0 mm | 0 cm | |
| 5 Dec. | Overcast | -3° /-8° | 0.1 mm | 0 cm | |
| 6 Dec. | Overcast | -2° /-6° | 0 mm | 0 cm | |
| 7 Dec. | Overcast | -3° /-6° | 0 mm | 0 cm | |
| 8 Dec. | Overcast | -1° /-7° | 0.9 mm | 0.1 cm | |
| 9 Dec. | Overcast | -1° /-6° | 0.1 mm | 0 cm | |
| 10 Dec. |  Light freezing rain | 0° /-6° | 1.8 mm | 0 cm | |
| 11 Dec. |  Sunny | -2° /-5° | 1.2 mm | 0 cm | |
| 12 Dec. | Sunny | -4° /-6° | 1.6 mm | 0 cm | |
| 13 Dec. | Partly cloudy | -4° /-6° | 3.2 mm | 0 cm | |
| 14 Dec. | Overcast | -2° /-6° | 5 mm | 1.9 cm | |
| 15 Dec. |  Moderate or heavy snow with thunder | 1° /-5° | 9.1 mm | 4.5 cm | |
| 16 Dec. |  Patchy rain possible | 3° /1° | 0.3 mm | 0 cm | |
| 17 Dec. | Patchy rain possible | 2° /0° | 0.4 mm | 0 cm | |
| 18 Dec. | Patchy rain possible | 3° /1° | 0.5 mm | 0 cm | |
| 19 Dec. | Patchy rain possible | 7° /2° | 0.7 mm | 0 cm | |
| 20 Dec. | Patchy rain possible | 3° /2° | 0.4 mm | 0 cm | |
| 21 Dec. | Patchy rain possible | 4° /3° | 0.2 mm | 0 cm | |
| 22 Dec. | Patchy rain possible | 3° /2° | 0.8 mm | 0 cm | |
| 23 Dec. | Sunny | 1° /-1° | 0 mm | 0 cm | |
| 24 Dec. | Sunny | 0° /-1° | 0 mm | 0 cm | |
| 25 Dec. | Sunny | -2° /-3° | 0 mm | 0 cm | |
| 26 Dec. | Sunny | -3° /-4° | 0 mm | 0 cm | |
| 27 Dec. | Partly cloudy | -2° /-3° | 0 mm | 0 cm | |
| 28 Dec. | Sunny | -4° /-4° | 0 mm | 0 cm | |
| 29 Dec. | Light freezing rain | -2° /-5° | 0.1 mm | 0.1 cm | |
| 30 Dec. | Overcast | -3° /-7° | 2.4 mm | 0.8 cm | |
| 31 Dec. |  Patchy moderate snow | -3° /-10° | 4 mm | 1.2 cm | |
| Next | |||||
Important Notice
Our weather forecast for Trondheim in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Trondheim forecast closer to your planned date for the most up-to-date weather information.
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Trondheim in December - FAQ
What are the expected maximum and minimum temperatures in Trondheim during December?
Brace for cold days with temperatures not exceeding -2° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Trondheim during December?
Significant rainfall exceeding 104.2 mm is expected in Trondheim during December, occurring over more than 2 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Trondheim in December 2025?
Trondheim experiences an average snowfall of 37.91 cm during December, occurring over 21 days.
What are the typical wind conditions in Trondheim during December?
The average wind speed in Trondheim during December is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
Trondheim snow forecast December 2025
Track daily snowfall levels and discover Trondheim’s snowy potential this December ❄️
On average, Trondheim sees 21 snowy days during December, with approximately 37.9 cm of total snowfall.
December rainfall patterns in Trondheim
Explore the daily rainfall trends and prepare for Trondheims December weather 💧
Typically, Trondheim has 2 rainy days in December with a total of 104.2 mm of rainfall.
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