Trondheim weather in December
December in Trondheim: freezing, rainy, with clean air — one of the weakest months to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#11 of 12 months in Trondheim · #1331 of 1413 destinations to visit in December · comfort 35/100 (tier F)
- Days
- 3°C
- Nights
- -2°C
- Wet days
- 13
- Sun
- 1 h
- Humidity
- 87%
- Daylight
- 5 h
Traveller notes on Trondheim in December
Forum posters describe December in Trondheim as bringing short, cold days with ground typically covered in snow, noting that locals lean toward cross-country skiing rather than walking this time of year. Posters are direct that heavy snow arriving right before or during a visit can rule out most walking plans entirely, though the tram ride up to Lian is consistently flagged as a safe, reliable option regardless of conditions. Posters consistently recommend wool long underwear along with a hat and gloves as genuine essentials, noting that special outerwear pants aren't really needed for strolling around the city itself. Posters flag that many students leave for the holidays, leaving Trondheim noticeably quieter than usual through late December. Posters generally rate December as workable but genuinely weather-dependent, with flexibility the key to enjoying a winter visit.
Other months in Trondheim
June in Trondheim barely gets dark — over twenty hours of daylight — and the forum's own saying is that if you are not happy with the weather, give it five minutes. Expect 10 to 20°C, some nights down to 5, occasional days above 25, and the honest possibility of cold, windy and rainy instead. They call June relatively dry, though the record still shows rain on about thirteen days. The packing list is a list precisely because you may need all of it: windproof and waterproof shell, a woollen sweater, long trousers, hiking shoes, and shorts. June versus July is not worth agonising over — the difference is statistical.
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Trondheim climate normals — December
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Trondheim in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsChristmas market on Torvet, Christmas holidays in Norway, school holidays in 7 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Trondheim's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherTrondheim's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Trondheim in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Aurora season
15 Sep – 31 Mar · usuallyFar enough south that it takes an active night rather than any dark one, but on those nights the lights are visible from the Bymarka hills fifteen minutes out of the centre. Coastal cloud is the usual spoiler.
- Opening
Christmas market on Torvet
25 Nov – 23 Dec · usuallyChristmas & New YearCrowdedStalls fill the main square under the Olav statue from around the first Sunday of Advent. It is the one thing keeping the centre busy in a month when it is dark by three in the afternoon. Source ↗
- Nature
Polar night
About 4.7 hours of daylight a day in December; the light is the story, not the sights.
from the climate normals
- Season
Snow season
Ski seasonAbout 38 cm of snow falls in the month.
from the climate normals
Nearby, and something's on
Within 300 km of Trondheim — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Trondheim?
Trondheim in December — FAQ
- Is December a good time to visit Trondheim?
- December in Trondheim: freezing, rainy, with clean air — one of the weakest months to visit. It ranks #11 of 12 months for Trondheim on SeasonMap's comfort score (35/100).
- What is the weather like in Trondheim in December?
- In December, Trondheim averages a daily high of 3°C and a low of -2.5°C, with about 85.6 mm of rain over roughly 12.6 rainy days.
- What is the air quality in Trondheim in December?
- Trondheim has a mean US Air Quality Index of about 33 in December.
- Does it snow in Trondheim in December?
- Trondheim sees roughly 37.9 cm of snowfall in December.
Within 300 km: Åre's Ski season around 5 Dec – 3 May, and Geiranger's Village closed for winter around 15 Oct – 15 Apr.