December weather forecast and climate
Copenhagen, Denmark

The first month of the winter, December, is still a cold month in Copenhagen, Denmark, with average temperature varying between -0.2°C (31.6°F) and 4.1°C (39.4°F).

Temperature

In December, the average high-temperature is relatively the same as in November - a cold 4.1°C (39.4°F). In Copenhagen, the average low-temperature is -0.2°C (31.6°F).

Humidity

The average relative humidity in December is 85%.

Rainfall

In Copenhagen, during 15.4 rainfall days, 46mm (1.8") of precipitation is typically accumulated. Throughout the year, in Copenhagen, there are 157.4 rainfall days, and 522.6mm (20.6") of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall in Copenhagen.

Sea temperature

In Copenhagen, the average seawater temperature is 5.6°C (42.1°F).
Note: Swimming in 5.6°C (42.1°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

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

Sunshine

December has the least sunshine of the year in Copenhagen, with an average of 1.2h of sunshine.

UV index

January and December, with an average maximum UV index of 0, are months with the lowest UV index in Copenhagen. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 0 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 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.