Weather in Oslo in December 2025
- December is usually the wettest month of the year in Oslo;
Average weather
Average temperature in Oslo in December
The temperature in December is -3°C on average, with a range between a maximum of +6°C during the day and a minimum of -13°C at night.
The average maximum temperature goes up 21% by the end of the month, compared with the beginning of the month, from -5°C to -1°C.
Is Oslo warm or cold in December?
Oslo is typically cool in December.
Maximum temperatures go down compared to the previous month from +4°C to +1°C. The minimum temperature also goes down from 0°C to -4°C.
Pack a sweater and a jacket as there will be cooler temperatures.
December is one of the coolest months in Oslo, here is the comparison with other months:
Water temperature in Oslo in December
Water in Oslo in December is Cold. It varies from +3°C to +10°C, with an average of +6°C. Note that the air temperature is lower than the water temperature, averaging around +1°C.
In December, water temperatures are average relative to the rest of the year:
Can you swim in Oslo in December?
Climate in Oslo in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +4°C | +1°C | 0°C | ||||
| Min. temperature | ||||||
| -15°C | -26°C | -28°C | ||||
| Max. temperature | ||||||
| +15°C | +13°C | +18°C | ||||
| Rainfall | ||||||
| 69 mm | 34 mm | 29 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Avg. water temperature | ||||||
| +9°C | +6°C | +4°C | ||||
| Humidity | ||||||
| 83% | 85% | 84% | ||||
| Air pressure | ||||||
| 1009 HPa | 1008 HPa | 1009 HPa | ||||
| Sunny days | ||||||
| 2 | 2 | 3 | ||||
| Cloudy days | ||||||
| 13 | 14 | 13 | ||||
| Rainy days | ||||||
| 9 | 4 | 3 | ||||
| Snowy days | ||||||
| 7 | 11 | 12 | ||||
December typically has worse weather conditions compared to November. It’s getting colder in December. From +4°C in the day, the average maximum temperature lowers to +1°C. As December arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 69 mm to 34 mm. Humidity rises from 83% to 85%. The average wind speed doesn’t change much during December, staying around 2 m/s. The amount of sunny days stay about the same, averaging 2 sunny days during the month.
But maybe it is worth considering traveling in January as the weather gets better.
Wind
The average wind speed is 2 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Oslo is gradually increasing during December, going from 2 m/s to 3 m/s over the course of the month.
Rain
Snow
December is one of the snowiest months in Oslo.
Here’s how December is compared with other months in the amount of snow, total mm:
How was the weather last December in Oslo?
Climate Change over Years
The climate in Oslo in December has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+8°C) and the highest in 2020 (+12°C). The driest year was 1981 with only 527 mm of rainfall, and the wettest year was 2020 with 2467 mm.
FAQ
Is December a good time to visit Oslo?
Can you sunbathe in Oslo in December?
Can you swim in Oslo in December?
Is Oslo rainy in December?
Is it sunny in Oslo in December?
Other cities in Norway
Monthly weather in Oslo
Source of the data
For this page, we’ve looked at the typical weather in Oslo, 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.
