Climate averages 1991–2020
Oslo weather
in December.
A freezing month with moderate precipitation: the 11th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a freezing month in Oslo: daytime highs average -0.5°C and nights cool to about -4.8°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 71 mm of precipitation on roughly 11 days, which makes December a month with moderate precipitation (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 6 h 04 min on an average December day.
The nearest other city in this atlas is Lillestrøm (18 km away). In December its highs average -0.7°C, about as warm as Oslo, with 66 mm of precipitation.
Among the 8 cities listed in Norway, Oslo ranks 6th of 8 for the warmest December highs and 3rd of 8 for the driest December (precipitation, lowest first). The mean December high of those 8 cities is 1.4°C; Oslo is 1.9°C cooler than that mean.
From December to January, average highs fall by 1.5°C to -1.9°C, and monthly precipitation rises from 71 mm to 72 mm.
The annual picture
December 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
Oslo climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -1.9°C-6.8°C | -6.8°C | 72 | 10.9 | 6.87 h |
| February | -0.4°C-6.4°C | -6.4°C | 52 | 8.6 | 9.19 h |
| March | 4.0°C-3.3°C | -3.3°C | 54 | 8.2 | 11.812 h |
| April | 9.8°C1.1°C | 1.1°C | 55 | 9.1 | 14.515 h |
| May | 15.7°C6.4°C | 6.4°C | 77 | 11.4 | 17.117 h |
| June | 19.4°C10.9°C | 10.9°C | 95 | 12.3 | 18.719 h |
| July | 21.6°C13.9°C | 13.9°C | 100 | 12.6 | 18.018 h |
| August | 20.2°C13.2°C | 13.2°C | 112 | 14.2 | 15.616 h |
| September | 15.5°C9.5°C | 9.5°C | 89 | 10.8 | 12.913 h |
| October | 9.0°C4.6°C | 4.6°C | 94 | 11.7 | 10.210 h |
| November | 3.8°C0.3°C | 0.3°C | 92 | 12.0 | 7.68 h |
| December, selected | -0.5°C-4.8°C | -4.8°C | 71 | 11.1 | 6.16 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
December in nearby cities
- Lillestrøm in DecemberNorway · 18 kmHigh -0.7°C · Low -5.0°C · 66 mm precipitation
- Drammen in DecemberNorway · 36 kmHigh -0.3°C · Low -4.9°C · 74 mm precipitation
- Fredrikstad in DecemberNorway · 78 kmHigh 2.2°C · Low -1.4°C · 70 mm rain
- Kristiansand in DecemberNorway · 252 kmHigh 3.9°C · Low 0.7°C · 123 mm rain
- Gothenburg in DecemberSweden · 255 kmHigh 3.2°C · Low -0.3°C · 73 mm rain
- Örebro in DecemberSweden · 261 kmHigh 1.0°C · Low -2.8°C · 49 mm precipitation
- Borås in DecemberSweden · 274 kmHigh 1.9°C · Low -1.5°C · 75 mm precipitation
- Stavanger in DecemberNorway · 302 kmHigh 4.7°C · Low 1.8°C · 209 mm rain
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 Oslo) is explained once on the Oslo year overview and on the Sources, method and limits page.