Weather in Brussels for December 2025
With an average of 2 snowy days, Brussels usually enjoys a light touch of snow in December.
In general, the average temperature in Brussels at the beginning of December is 6 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 9 °C by the end of December.
Brussels experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 92.8 mm.
Snow Forecast ❄️
Temperatures
Rain 🌧️
Brussels in December average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  7° | 2  6° | 3  4° | 4 6° | 5  6° | 6 7° | 7  6° |
| 8 6° | 9 6° | 10  5° | 11 6° | 12 7° | 13 6° | 14 6° |
| 15 8° | 16  8° | 17 7° | 18 8° | 19 10° | 20 8° | 21 9° |
| 22 9° | 23 10° | 24 9° | 25 9° | 26 9° | 27 8° | 28 8° |
| 29 9° | 30 10° | 31 10° |
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Temperatures trend during December in Brussels
December weather day by day
| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Dec. | Overcast | 7° /2° | 1.7 mm | 0 cm | |
| 2 Dec. | Moderate rain at times | 6° /1° | 1.2 mm | 0 cm | |
| 3 Dec. | Light freezing rain | 4° /0° | 1.2 mm | 0.3 cm | |
| 4 Dec. | Moderate or heavy rain shower | 6° /1° | 2.9 mm | 0 cm | |
| 5 Dec. | Heavy rain at times | 6° /2° | 3.9 mm | 0.2 cm | |
| 6 Dec. | Moderate rain at times | 7° /2° | 4.4 mm | 0 cm | |
| 7 Dec. | Patchy rain possible | 6° /2° | 3.9 mm | 0 cm | |
| 8 Dec. | Patchy rain possible | 6° /2° | 1.9 mm | 0 cm | |
| 9 Dec. | Patchy rain possible | 6° /2° | 3.2 mm | 0 cm | |
| 10 Dec. | Cloudy | 5° /2° | 4 mm | 0 cm | |
| 11 Dec. | Moderate rain at times | 6° /1° | 2.2 mm | 0.1 cm | |
| 12 Dec. | Overcast | 7° /2° | 1.5 mm | 0 cm | |
| 13 Dec. | Moderate rain at times | 6° /2° | 3.1 mm | 0 cm | |
| 14 Dec. | Overcast | 6° /2° | 1.7 mm | 0 cm | |
| 15 Dec. | Patchy rain possible | 8° /2° | 1.1 mm | 0 cm | |
| 16 Dec. | Partly cloudy | 8° /3° | 0.1 mm | 0 cm | |
| 17 Dec. | Overcast | 7° /3° | 0.7 mm | 0 cm | |
| 18 Dec. | Partly cloudy | 8° /3° | 0.6 mm | 0 cm | |
| 19 Dec. | Patchy rain possible | 10° /4° | 3.9 mm | 0 cm | |
| 20 Dec. | Partly cloudy | 8° /4° | 3.1 mm | 0 cm | |
| 21 Dec. | Moderate or heavy rain shower | 9° /4° | 4.8 mm | 0 cm | |
| 22 Dec. | Moderate rain at times | 9° /5° | 6.2 mm | 0 cm | |
| 23 Dec. | Moderate or heavy rain shower | 10° /6° | 5.6 mm | 0 cm | |
| 24 Dec. | Patchy rain possible | 9° /5° | 1.7 mm | 0 cm | |
| 25 Dec. | Patchy rain possible | 9° /5° | 4.9 mm | 0 cm | |
| 26 Dec. | Overcast | 9° /3° | 1.5 mm | 0 cm | |
| 27 Dec. | Patchy rain possible | 8° /4° | 4.6 mm | 0 cm | |
| 28 Dec. | Moderate rain at times | 8° /4° | 2.2 mm | 0 cm | |
| 29 Dec. | Patchy rain possible | 9° /4° | 1.9 mm | 0 cm | |
| 30 Dec. | Patchy rain possible | 10° /4° | 1.4 mm | 0 cm | |
| 31 Dec. | Moderate rain at times | 10° /5° | 2.4 mm | 0 cm | |
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Guide for Brussels in December
In December, Brussels, Belgium experiences a transition from mild autumn weather to the colder temperatures of winter. At the beginning of the month, the weather in Brussels is typically chilly, with temperatures averaging around 6°.
The city may also experience occasional rainfall and overcast skies during this time. As the month progresses, the temperatures tend to drop further, with the end of December seeing an average temperature of around 3°.
Additionally, there is an increased likelihood of snowfall towards the end of the month, creating a picturesque winter atmosphere in the city.
It's important to note that Brussels' weather in December can be quite unpredictable, with the potential for sudden temperature fluctuations and varying levels of precipitation.
Travelers visiting Brussels during this time should be prepared for cold weather and should pack accordingly, with warm clothing and waterproof outerwear being essential.
Overall, December in Brussels offers a festive ambiance, with the city's charming Christmas markets and decorations adding to the seasonal charm despite the colder temperatures.
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Brussels in December - FAQ
Brussels snow forecast December 2025
December rainfall patterns in Brussels
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