December weather forecast
Oslo, Norway

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The Vigeland sculpture park in Oslo, Norway, at dusk
The Vigeland sculpture park in Oslo, Norway, at dusk

Weather in December

December wraps up the year with a prominent winter feel in Oslo. The dropping temperatures, which reach lows of -5.6°C (21.9°F), combined with a brief 6.1 hours of daylight, create a truly authentic winter atmosphere. Despite the chilly conditions, the city's festive lights and holiday markets add warmth and cheer. Ice-skating rinks and colorful Christmas markets are integral to the cheerful spirit that defines an Oslo December.

Temperature

December is characterized by a slight reduction in average high-temperature, easing from a wintry 3.2°C (37.8°F) in November to a subzero cold -0.5°C (31.1°F). During December, Oslo sees a mean low-temperature of -5.6°C (21.9°F).

Rainfall

In Oslo, during December, the rain falls for 6 days and regularly aggregates up to 55mm (2.17") of precipitation. In Oslo, during the entire year, the rain falls for 77 days and collects up to 763mm (30.04") of precipitation.

Sea temperature

In Oslo, Norway, the average seawater temperature in December is 6.3°C (43.3°F).
Note: It is life-risking to swim in 6.3°C (43.3°F). Briefly staying in 13°C (55.4°F) waters feels unsettling, and temperatures below 10°C (50°F) might result in cold shock and loss of breath control, hinging on personal endurance.

Daylight

With an average of 6h and 6min of daylight, December has the shortest days of the year in Oslo.
On the first day of December, sunrise is at 08:52 and sunset at 15:20. On the last day of the month, sunrise is at 09:18 and sunset at 15:21 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. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 0 suggests this advice:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.

Frequently asked questions

How cold is it in Oslo in December?

The average high-temperature and low-temperature in Oslo during December are -0.5°C (31.1°F) and -5.6°C (21.9°F) respectively.

How much does it rain in Oslo in December?

In Oslo, Norway, in December, during 6 rainfall days, 55mm (2.17") of precipitation is typically accumulated.

What is the sea water temperature in December in Oslo?

In December, the average sea temperature in Oslo, Norway, is 6.3°C (43.3°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

What is the month with the shortest days in Oslo?

With an average of 6h and 6min of daylight, December has the shortest days of the year in Oslo.

What is the average length of the day in December in Oslo?

In December, the average day length in Oslo is 6h and 4min.

What time are sunrise and sunset in December in Oslo?

On the first day of December in Oslo, Norway, sunrise is at 08:52 and sunset at 15:20. On the last day of the month, sunrise is at 09:18 and sunset at 15:21 CET.

What is the month with the least sunshine in Oslo?

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

How many hours of sunshine does Oslo have in December?

In December, the average sunshine duration in Oslo is 1.1h.

When is the lowest UV index in Oslo?

January, November and December, with an average maximum UV index of 0, are months with the lowest UV index.

How high is the UV index in December in Oslo?

In December, the average daily maximum UV index in Oslo, Norway, is 0. A UV Index of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to UV radiation.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Oslo, Norway

Average temperature in December - Oslo, Norway
  • Average high temperature in December: -0.5°C

The warmest month (with the highest average high temperature) is July (21.5°C).
The month with the lowest average high temperature is January (-1.8°C).

  • Average low temperature in December: -5.6°C

The month with the highest average low temperature is July (12.2°C).
The coldest months (with the lowest average low temperature) are January and February (-6.8°C).

Average rainfall in December
Oslo, Norway

Average rainfall in December - Oslo, Norway
  • Average rainfall in December: 55mm

The wettest month (with the highest rainfall) is September (90mm).
The driest month (with the least rainfall) is February (36mm).

Average rainfall days in December
Oslo, Norway

Average rainfall days in December - Oslo, Norway
  • Average rainfall days in December: 6 days

The months with the highest number of rainy days are August, October and November (8 days).
The month with the least rainy days is February (4 days).

Average sea temperature in December
Oslo, Norway

Average sea temperature in December - Oslo, Norway
  • Average sea temperature in December: 6.3°C

The best month for swimming (with the highest average sea temperature) is August (17.9°C).
The coldest month (with the lowest average sea temperature) is March (3°C).

Average daylight in December /
Average sunshine in December
Oslo, Norway

Average daylight in December / Average sunshine in December - Oslo, Norway
  • Average daylight in December: 6h and 1min

The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).

  • Average sunshine in December: 1h and 1min

The month with the most sunshine is June (Average sunshine: 8h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 6min).

Average UV index in December
Oslo, Norway

Average UV index in December - Oslo, Norway
  • Average UV index in December: 0

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, November and December (UV index 0).

Oslo, Norway

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