Monthly climate guide
Tromsø weather in December
With highs near -3°C (26°F) and lows around -8°C (17°F), December feels freezing in Tromsø. Rainfall averages about 115 mm (wet) and the sky is often cloudy. Daytime highs are 2°C cooler than November and 3°C warmer than January.
What stands out in December
- Just 170 km apart, but Tromsø runs about 2°C warmer than Alta this month.
- Only 2 months are cooler in Tromsø than December.
- Mornings start cold: the average low is -8°C, and frost is common.
- There's little difference between day and night (around 5°C).
Avg high
-3°C
26°F
Avg low
-8°C
17°F
Rainfall
115 mm
wet
Humidity
96%
relative
Sky
86%
cloud · often cloudy
Tromsø weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | -6°C / 21°F | -11°C / 11°F | 89 mm | 96% | 82% |
| February | -5°C / 23°F | -11°C / 13°F | 96 mm | 95% | 83% |
| March | -3°C / 27°F | -8°C / 18°F | 135 mm | 93% | 87% |
| April | 0°C / 33°F | -5°C / 24°F | 92 mm | 92% | 82% |
| May | 6°C / 43°F | 0°C / 33°F | 92 mm | 86% | 79% |
| June | 12°C / 53°F | 5°C / 41°F | 114 mm | 81% | 81% |
| July | 16°C / 60°F | 9°C / 47°F | 104 mm | 82% | 79% |
| August | 14°C / 57°F | 8°C / 46°F | 111 mm | 85% | 79% |
| September | 10°C / 51°F | 5°C / 40°F | 110 mm | 89% | 79% |
| October | 3°C / 37°F | -1°C / 30°F | 105 mm | 94% | 82% |
| November | -1°C / 30°F | -5°C / 23°F | 120 mm | 96% | 85% |
| December | -3°C / 26°F | -8°C / 17°F | 115 mm | 96% | 86% |
What to pack for December
- A proper insulated winter coat
- A hat, scarf and gloves
- Thermal base layers and warm, grippy boots for icy mornings
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is December a good time to visit Tromsø?
Compare the months in the chart above to find your ideal window.
Best time to visit Tromsø →Other Norway cities in December
Cite or embed this data
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Tromsø weather in December. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/norway/tromso/december
<a href="https://weathercompare.eu/weather/norway/tromso/december">Tromsø weather in December</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/norway/tromso" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Tromsø weather in December"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/norway/tromso/december">Tromsø weather in December</a> – WeatherCompare</p>
Tromsø in December: quick answers
Is December a good time to visit Tromsø?
December is cool in Tromsø, with highs around -3°C. Better for museums and city walks than the beach, and usually quieter.
How warm is Tromsø in December?
Average highs are about -3°C (26°F) and average lows about -8°C (17°F), based on 10 years of daily data.
Does it rain a lot in Tromsø in December?
Tromsø typically gets around 115 mm of rain in December — wet.
Figures are long-term averages for the area around Tromsø (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.