December weather forecast and climate
Roskilde, Denmark

Weather in December

The first month of the winter, December, is still a cold month in Roskilde, Denmark, with average temperature varying between 1.8°C (35.2°F) and 4.5°C (40.1°F).

Temperature

In Roskilde, the average high-temperature in December slightly decreases, from a chilly 7.6°C (45.7°F) in November, to a wintry 4.5°C (40.1°F). In Roskilde, the average low-temperature is 1.8°C (35.2°F).

Humidity

January, November and December, with an average relative humidity of 88%, are most humid months in Roskilde, Denmark.

Rainfall

In Roskilde, during 13.4 rainfall days, 26mm (1.02") of precipitation is typically accumulated. Throughout the year, in Roskilde, there are 166.6 rainfall days, and 341mm (13.43") of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Roskilde, snow falls for 5.5 days, with typically accumulated 25mm (0.98") of snow. In Roskilde, during the entire year, snow falls for 26.6 days, and aggregates up to 122mm (4.8") of snow.

Sea temperature

In Roskilde, the average seawater temperature is 5.1°C (41.2°F).
Note: Swimming in 5.1°C (41.2°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

The month with the shortest days in Roskilde is December, with an average of 7.1h of daylight.

Sunshine

With an average of 3h of sunshine, December has the least sunshine of the year.

UV index

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the most humid month in Roskilde?

Months with the highest humidity are January, November and December, with an average relative humidity of 88%.

What is the average humidity in December in Roskilde?

In Roskilde, the average relative humidity in December is 88%.

How much does it rain in Roskilde in December?

In Roskilde, in December, it is raining for 13.4 days, with typically 26mm (1.02") of accumulated precipitation.

How many days does it snow in December in Roskilde?

In December, it is snowing for 5.5 days. Throughout December, 25mm (0.98") of snow is accumulated.

What is the water temperature in December in Roskilde?

In Roskilde, Denmark, in December, the average water temperature is 5.1°C (41.2°F). Swimming in 5.1°C (41.2°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Roskilde?

December has the shortest days of the year in Roskilde, with an average of 7.1h of daylight.

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

In December, the average length of the day is 7.1h.

What is the month with the least sunshine in Roskilde?

With an average of 3h of sunshine, December has the least sunshine of the year in Roskilde, Denmark.

How many hours of sunshine does Roskilde have in December?

The average sunshine in December in Roskilde is 3h.

What is the UV index intensity in December in Roskilde?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV rays.

Average temperature in December
Roskilde, Denmark

Average temperature in December - Roskilde, Denmark
  • Average high temperature in December: 4.5°C

The warmest month (with the highest average high temperature) is July (20.4°C).
Months with the lowest average high temperature are January and February (2.8°C).

  • Average low temperature in December: 1.8°C

The month with the highest average low temperature is August (14.9°C).
The coldest month (with the lowest average low temperature) is February (-0.6°C).

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Average pressure in December
Roskilde, Denmark

Average pressure in December - Roskilde, Denmark
  • Average pressure in December: 1011.2mbar

The month with the highest atmospheric pressure is April (1015.6mbar).
The month with the lowest atmospheric pressure is December (1011.2mbar).

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Average wind speed in December
Roskilde, Denmark

Average wind speed in December - Roskilde, Denmark
  • Average wind speed in December: 19.1km/h

The windiest month (with the highest average wind speed) is December (19.1km/h).
The calmest month (with the lowest average wind speed) is July (13.9km/h).

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Average humidity in December
Roskilde, Denmark

Average humidity in December - Roskilde, Denmark
  • Average humidity in December: 88%

Months with the highest relative humidity are January, November and December (88%).
Months with the lowest relative humidity are April, May, June and July (77%).

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Average rainfall in December
Roskilde, Denmark

Average rainfall in December - Roskilde, Denmark
  • Average rainfall in December: 26mm

The wettest month (with the highest rainfall) is August (45mm).
The driest month (with the least rainfall) is April (17mm).

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Average rainfall days in December
Roskilde, Denmark

Average rainfall days in December - Roskilde, Denmark
  • Average rainfall days in December: 13.4 days

Months with the highest number of rainy days are July and August (16.9 days).
The month with the least rainy days is February (9.1 days).

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Average snowfall in December
Roskilde, Denmark

Average snowfall in December - Roskilde, Denmark
  • Average snowfall in December: 25mm

The month with the highest snowfall is February (35mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

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Average snowfall days in December
Roskilde, Denmark

Average snowfall days in December - Roskilde, Denmark
  • Average snowfall days in December: 5.5 days

The month with the highest number of snowfall days is January (8.3 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in December
Roskilde, Denmark

Average sea temperature in December - Roskilde, Denmark
  • Average sea temperature in December: 5.1°C

The best month for swimming (with the highest average sea temperature) is August (18.4°C).
The coldest month (with the lowest average sea temperature) is February (2.1°C).

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Average daylight in December /
Average sunshine in December
Roskilde, Denmark

Average daylight in December / Average sunshine in December - Roskilde, Denmark
  • Average daylight in December: 7.1h

The month with the longest days is June (Average daylight: 17.4h).
The month with the shortest days is December (Average daylight: 7.1h).

  • Average sunshine in December: 3h

The month with the most sunshine is August (Average sunshine: 9.4h).
The month with the least sunshine is December (Average sunshine: 3h).

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Average sunshine days in December
Roskilde, Denmark

Average sunshine days in December - Roskilde, Denmark
  • Average sunshine days in December: 10.5 days

The month with the most sunshine days is April (14.6 days).
The month with the least sunshine days is August (9.8 days).

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Average UV index in December
Roskilde, Denmark

Average UV index in December - Roskilde, Denmark
  • Average UV index in December: 2

Months with the highest UV index are July and August (UV index 5).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in December
Roskilde, Denmark

Average cloud cover in December - Roskilde, Denmark
  • Average cloud cover in December: 71

The month with the most cloud cover is December (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 39).

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Average visibility in December
Roskilde, Denmark

Average visibility in December - Roskilde, Denmark
  • Average visibility in December: 9km

Months with the highest visibility are April, June, August and September (10km).
Months with the lowest visibility are January, February, March, May, July, October, November and December (9km).

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