December weather forecast
Oslo, Norway

The first month of the winter, December, is also a subzero cold month in Oslo, Norway, with an average temperature varying between -0.5°C (31.1°F) and -5.6°C (21.9°F).

Temperature

In December, the average high-temperature slightly decreases from a wintry 3.2°C (37.8°F) in November to a freezing cold -0.5°C (31.1°F). The average low-temperature, in Oslo, is -5.6°C (21.9°F).

Rainfall

In December, the rain falls for 6 days. Throughout December, 55mm (2.17") of precipitation is accumulated. Throughout the year, in Oslo, there are 77 rainfall days, and 763mm (30.04") of precipitation is accumulated.

Sea temperature

In December, the average sea temperature in Oslo is 6.3°C (43.3°F).
Note: Swimming in 6.3°C (43.3°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

With an average of 6h and 4min of daylight, December has the shortest days of the year in Oslo, Norway.
On the first day of December, sunrise is at 08:50 and sunset at 15:21. On the last day of the month, sunrise is at 09:18 and sunset at 15:20 CET.

Sunshine

With an average of 1.1h of sunshine, December has the least sunshine of the year in Oslo, Norway.

UV index

January, November and December, with an average maximum UV index of 0, are months with the lowest UV index in Oslo. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 0 in December interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.