December weather forecast
Cologne, Germany

Winter announces its arrival in full fervour in December with Cologne dropping to average high temperatures of just 5.9°C (42.6°F). The city decks up for Christmas, turning into a winter wonderland bedecked with lights and festivities, despite 71mm (2.8") of rainfall. The short daylight hours of just 8, the shortest of the year, create an atmosphere fitting for festive lightings and warm fireplaces. Cologne's December offers an unmatched winter charm, setting the stage for January to continue in a similar, frosty vein.

Temperature

December signifies a gentle decline in Cologne's average high-temperature, easing from a frosty 9.5°C (49.1°F) in November to a wintry 5.9°C (42.6°F). Throughout the month of December, the nighttime temperature in Cologne dips to an average of 0.4°C (32.7°F).

Rainfall

In Cologne, in December, during 18 rainfall days, 71mm (2.8") of precipitation is typically accumulated. Throughout the year, there are 192 rainfall days, and 839mm (33.03") of precipitation is accumulated.

Daylight

December has the shortest days of the year, with an average of 8h and 0min of daylight.
On the first day of December, sunrise is at 08:13 and sunset at 16:29. On the last day of the month, sunrise is at 08:34 and sunset at 16:35 CET.

Sunshine

The month with the least sunshine in Cologne, Germany, is December, with an average of 1.3h of sunshine.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.
Note: The daily high UV index of 1 during December translates into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.