Climate averages 1991–2020
Trondheim weather
in January.
A freezing month with heavy precipitation: the coolest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a freezing month in Trondheim: daytime highs average -1.1°C and nights cool to about -6.1°C. By daytime temperature it is the coolest month of the year.
Expect about 96 mm of precipitation on roughly 16 days, which makes January a month with heavy precipitation (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 5 h 45 min on an average January day.
The nearest other city in this atlas is Lillestrøm (388 km away). In January its highs average -2.0°C, 0.9°C cooler than Trondheim, with 65 mm of precipitation.
Among the 8 cities listed in Norway, Trondheim ranks 5th of 8 for the warmest January highs and 5th of 8 for the driest January (precipitation, lowest first). The mean January high of those 8 cities is 0.4°C; Trondheim is 1.5°C cooler than that mean.
From January to February, average highs rise by 0.6°C to -0.5°C, and monthly precipitation falls from 96 mm to 86 mm.
The annual picture
January in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Trondheim climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | -1.1°C-6.1°C | -6.1°C | 96 | 16.0 | 5.86 h |
| February | -0.5°C-6.1°C | -6.1°C | 86 | 14.5 | 8.69 h |
| March | 2.9°C-3.8°C | -3.8°C | 88 | 15.4 | 11.712 h |
| April | 7.8°C-0.4°C | -0.4°C | 67 | 13.6 | 14.915 h |
| May | 12.5°C3.8°C | 3.8°C | 70 | 15.6 | 18.118 h |
| June | 15.9°C8.1°C | 8.1°C | 95 | 15.6 | 20.320 h |
| July | 18.6°C10.8°C | 10.8°C | 85 | 14.8 | 19.319 h |
| August | 17.9°C10.6°C | 10.6°C | 99 | 14.9 | 16.316 h |
| September | 14.0°C7.3°C | 7.3°C | 102 | 14.8 | 13.113 h |
| October | 7.8°C2.2°C | 2.2°C | 87 | 15.2 | 9.910 h |
| November | 2.3°C-2.4°C | -2.4°C | 79 | 13.2 | 6.87 h |
| December | -0.6°C-5.7°C | -5.7°C | 94 | 15.3 | 4.85 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
January in nearby cities
- Lillestrøm in JanuaryNorway · 388 kmHigh -2.0°C · Low -6.9°C · 65 mm precipitation
- Oslo in JanuaryNorway · 392 kmHigh -1.9°C · Low -6.8°C · 72 mm precipitation
- Drammen in JanuaryNorway · 410 kmHigh -1.7°C · Low -6.7°C · 78 mm precipitation
- Bergen in JanuaryNorway · 429 kmHigh 2.4°C · Low -1.2°C · 249 mm rain
- Gävle in JanuarySweden · 466 kmHigh -0.7°C · Low -5.2°C · 33 mm precipitation
- Fredrikstad in JanuaryNorway · 469 kmHigh 1.0°C · Low -2.8°C · 65 mm precipitation
- Umeå in JanuarySweden · 489 kmHigh -2.7°C · Low -7.3°C · 49 mm precipitation
- Örebro in JanuarySweden · 528 kmHigh -0.3°C · Low -4.5°C · 43 mm precipitation
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Trondheim) is explained once on the Trondheim year overview and on the Sources, method and limits page.