December weather forecast
Brussels, Belgium

December sees Brussels, Belgium embrace winter fully, with the lowest average high temperature of the year at 6.1°C (43°F). Cold evenings, fewer daylight hours, and only about 1.5 sunshine hours per day set the scene for a classic European winter. Snowfall returns after its absence since early spring, peppering the cityscape with white caps and creating an enchantingly festive atmosphere. The holiday cheer coupled with the cold weather calls for layers of warm clothing, perhaps by a fireplace, completing the quintessential winter image.

Temperature

December's onset introduces a mild reduction in the average high-temperature, from a frosty 9.5°C (49.1°F) in November to a still chilly 6.1°C (43°F). During the nights of December, Brussels records an average temperature of 1.6°C (34.9°F), a minor drop from daytime peaks.

Humidity

The most humid month in Brussels is December, with an average relative humidity of 88.8%.

Rainfall

The month with the most rainfall in Brussels, Belgium, is December, when the rain falls for 19.3 days and typically aggregates up to 81mm (3.19") of precipitation.

Snowfall

January through April, November and December are months with snowfall. In December, in Brussels, Belgium, snow falls for 4.6 days. In Brussels, during the entire year, snow falls for 23.7 days.

Daylight

The month with the shortest days in Brussels, Belgium, is December, with an average of 8h and 0min of daylight.
On the first day of the month, sunrise is at 08:23 and sunset at 16:39. On the last day of December, sunrise is at 08:44 and sunset at 16:46 CET.

Sunshine

December has the least sunshine of the year in Brussels, with an average of 1.5h 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 estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum UV index of 1 during December translates into these guidelines:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.