Oulu in December: Weather, Average temperature and Climate
Weather in Oulu in December 2026
- December is usually the wettest month of the year in Oulu;
Average weather
Average temperature in Oulu in December
The expected average maximum temperature in December is -6°C with a maximum of +2°C and a minimum of -23°C.
The average maximum temperature goes down 24% by the end of the month, compared with the beginning of the month, from -5°C to -11°C.
Is Oulu warm or cold in December?
Oulu is typically cold in December.
Maximum temperatures go down compared to the previous month from 0°C to -4°C. The minimum temperature also goes down from -4°C to -9°C.
Wear your winter warms as it will be cold. To save space, layer, and don’t forget gloves and a scarf.
December is one of the coolest months in Oulu, here is the comparison with other months:
Water temperature in Oulu in December
Water in Oulu in December is Cold. It varies from -1°C to +5°C, with an average of +2°C. Note that the air temperature is lower than the water temperature, averaging around -4°C.
In December, water temperatures are average relative to the rest of the year:
Can you swim in Oulu in December?
Climate in Oulu in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | 0°C | -4°C | -7°C | |||
| Min. temperature | -29°C | -31°C | -38°C | |||
| Max. temperature | +10°C | +7°C | +6°C | |||
| Rainfall | 21 mm | 7 mm | 2 mm | |||
| Wind | 4 m/s | 3 m/s | 3 m/s | |||
| Avg. water temperature | +5°C | +2°C | -1°C | |||
| Humidity | 88% | 88% | 87% | |||
| Air pressure | 1008 HPa | 1006 HPa | 1007 HPa | |||
☀️ | Sunny days | 2 | 2 | 2 | ||
☁️ | Cloudy days | 12 | 13 | 15 | ||
🌧️ | Rainy days | 5 | 1 | 0 | ||
❄️ | Snowy days | 11 | 14 | 14 | ||
| Our opinion | OK | OK | OK | |||
December weather is still as ok as in November. It’s getting colder in December. From 0°C in the day, the average maximum temperature lowers to -4°C. As December arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 21 mm to 7 mm. Humidity levels don’t change as the month goes on, averaging around 88%. Winds are calmer in comparison to November, going down from 4 m/s to 3 m/s on average. The amount of sunny days stay about the same, averaging 2 sunny days during the month.
January brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Oulu is gradually decreasing during December, going from 3 m/s to 2 m/s over the course of the month.
Snow
December is one of the snowiest months in Oulu.
Here’s how December is compared with other months in the amount of snow, total mm:
How was the weather last December in Oulu?
Climate Change over Years
The climate in Oulu in December has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+3°C) and the highest in 2020 (+8°C). The driest year was 2002 with only 247 mm of rainfall, and the wettest year was 2021 with 603 mm.
FAQ
Is December a good time to visit Oulu?
Can you sunbathe in Oulu in December?
Can you swim in Oulu in December?
Is Oulu rainy in December?
Is it sunny in Oulu in December?
Other cities in Finland
Monthly weather in Oulu
Source of the data
For this page, we’ve looked at the typical weather in Oulu, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
