Brussels Weather in December
Brussels in December averages 8°C (46°F) during the day and 2°C (36°F) at night. This is part of the winter season, and quite a bit of rainfall is expected this month.
Rainfall in Brussels in December
Historically, the month has about 18 days of rain, averaging 78 mm (3.1 in) in total. Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.
Temperature in Brussels in December
In December, expect low temperatures in Brussels, with highs of 8°C (46°F) and lows of 2°C (36°F) at night. This month falls in the winter season. Even at the warmest part of the day, temperatures stay low. Dressing warmly from the start is the sensible approach. Nights fall to 2°C (36°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Brussels in December
The city usually sees around 45 hours of sunlight, indicating fewer sunny days.
Wind Speed in Brussels in December
Wind speeds average 4 m/s (8 knots) during December. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Brussels. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Belgium, check out our Brussels's climate page.
Brussels Temperature in December
Min Temperature
2°C (36°F)
Max Temperature
8°C (46°F)
Chance of Rain
61%
Precipitation
78 mm (3.1 in)
Rainy days
18 days
Humidity
86%
Windspeed
4 m/s (8 knots)
Sunshine
45 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Brussels typically stay consistent throughout December, with daily highs averaging around 8°C (46°F). Nights are cold, with lows around 2°C (36°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Brussels in December
Browse day-by-day weather records for Brussels spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Brussels historical weather extremes in December
According to our 49 years of weather records for Brussels, the following extremes were recorded between 1976 and 2025.
- The hottest December day on record in Brussels reached 17°C (63°F) (December 16, 1989).
- The lowest daytime temperature in December was -6°C (21°F), recorded on December 31, 1978.
- Brussels registered its coldest December night on December 19, 2009, with temperatures dropping to -13°C (9°F).
Best Places in Belgium in December
Find out more about the weather in Belgium and which places have the best travel conditions in this month. See all of Belgium in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Brussels in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Rain gear is recommended, you can expect wet weather on multiple days. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.What To Do in Brussels in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Belgium, check out our Brussels's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Brussels climate overview or explore weather in Belgium.
