December weather forecast and climate
Oslo, Norway

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

Weather in December

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

Temperature

In Oslo, the average high-temperature in December slightly decreases, from a cold 3.2°C (37.8°F) in November, to a subzero cold -0.5°C (31.1°F). In Oslo, the average low-temperature 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. In Oslo, Norway, during the entire year, the rain falls for 77 days and collects up to 763mm (30.04") of precipitation.

Sea temperature

In Oslo, in December, the average water temperature is 6.3°C (43.3°F).
Note: Swimming in 6.3°C (43.3°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

December has the shortest days of the year in Oslo, Norway, with an average of 6.1h of daylight.

Sunshine

The month with the least sunshine in Oslo is December, with an average of 1.1h of sunshine.

UV index

Months with the lowest UV index are January, November and December, with an average maximum UV index of 0. A UV Index reading of 2, and below, represents a low threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 0 in December transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

How much does it rain in Oslo in December?

In December, in Oslo, Norway, the rain falls for 6 days. Throughout December, 55mm (2.17") of precipitation is accumulated.

What is the sea water temperature in December in Oslo?

In Oslo, Norway, the average seawater temperature in December is 6.3°C (43.3°F). 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.

What is the month with the shortest days in Oslo?

December has the shortest days of the year, with an average of 6.1h of daylight.

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

The average length of the day in December is 6.1h.

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.

How many hours of sunshine does Oslo have in December?

In December, the average sunshine is 1.1h.

What are the months with 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 in Oslo, Norway.

What is the UV index reading in December in Oslo?

The average daily maximum UV index in December is 0. A UV Index estimate of 2, and below, represents a minimal hazard to health from the exposure to the Sun's UV rays.

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).

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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).

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Average rainfall days in December
Oslo, Norway

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

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).

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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).

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

Average daylight in December / Average sunshine in December - Oslo, Norway
  • Average daylight in December: 6.1h

The month with the longest days is June (Average daylight: 18.7h).
The month with the shortest days is December (Average daylight: 6.1h).

  • Average sunshine in December: 1.1h

The month with the most sunshine is June (Average sunshine: 8.3h).
The month with the least sunshine is December (Average sunshine: 1.1h).

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Average UV index in December
Oslo, Norway

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

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

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