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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.

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

Brussels Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Brussels - and find the best time to visit.

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 records 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

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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.

  • Swimming
    4/10
  • Cycling
    4/10
  • Walking
    4/10
  • Camping
    4/10
  • Outdoor sports
    4/10

Brussels 3-Day Forecast

More climate data for Brussels

Popular in December

Where to go in December - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.