Climate averages 1991–2020
Oulu weather
in December.
A freezing month with moderate precipitation: the 10th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a freezing month in Oulu: daytime highs average -2.9°C and nights cool to about -7.2°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 44 mm of precipitation on roughly 11 days, which makes December a month with moderate precipitation (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 3 h 54 min on an average December day.
The nearest other city in this atlas is Luleå (167 km away). In December its highs average -2.4°C, about as warm as Oulu, with 51 mm of precipitation.
Among the 13 cities listed in Finland, Oulu ranks 12th of 13 for the warmest December highs and 1st of 13 for the driest December (precipitation, lowest first). The mean December high of those 13 cities is -1.3°C; Oulu is 1.6°C cooler than that mean.
From December to January, average highs fall by 2.6°C to -5.5°C, and monthly precipitation falls from 44 mm to 35 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
Oulu climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -5.5°C-10.2°C | -10.2°C | 35 | 8.8 | 5.15 h |
| February | -6.0°C-10.6°C | -10.6°C | 29 | 8.0 | 8.38 h |
| March | -1.9°C-7.1°C | -7.1°C | 30 | 7.7 | 11.712 h |
| April | 4.0°C-2.6°C | -2.6°C | 30 | 7.4 | 15.215 h |
| May | 10.9°C3.8°C | 3.8°C | 48 | 10.0 | 18.719 h |
| June | 16.0°C9.6°C | 9.6°C | 56 | 10.0 | 21.622 h |
| July | 19.5°C13.4°C | 13.4°C | 78 | 12.1 | 20.220 h |
| August | 17.6°C12.0°C | 12.0°C | 71 | 12.0 | 16.617 h |
| September | 12.2°C7.5°C | 7.5°C | 56 | 10.4 | 13.213 h |
| October | 5.0°C1.5°C | 1.5°C | 50 | 10.3 | 9.810 h |
| November | 0.3°C-3.1°C | -3.1°C | 48 | 10.6 | 6.36 h |
| December, selected | -2.9°C-7.2°C | -7.2°C | 44 | 10.8 | 3.94 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
- Luleå in DecemberSweden · 167 kmHigh -2.4°C · Low -6.6°C · 51 mm precipitation
- Kuopio in DecemberFinland · 259 kmHigh -2.8°C · Low -6.3°C · 51 mm precipitation
- Umeå in DecemberSweden · 282 kmHigh -0.8°C · Low -4.9°C · 62 mm precipitation
- Jyväskylä in DecemberFinland · 308 kmHigh -2.2°C · Low -6.0°C · 46 mm precipitation
- Joensuu in DecemberFinland · 341 kmHigh -3.3°C · Low -6.8°C · 53 mm precipitation
- Tampere in DecemberFinland · 400 kmHigh -1.5°C · Low -4.7°C · 46 mm precipitation
- Pori in DecemberFinland · 434 kmHigh 0.4°C · Low -2.9°C · 52 mm precipitation
- Lahti in DecemberFinland · 448 kmHigh -1.5°C · Low -5.2°C · 48 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 Oulu) is explained once on the Oulu year overview and on the Sources, method and limits page.