Brussels Capital weather in December
December is one of the least pleasant months in Brussels Capital: highs of 6°C (42°F) and about 78 mm (3.1 in) of rain on average. Nights average 1°C (34°F) and cloud cover 77% (NASA POWER, 2001–2025 averages). It is the 2nd wettest month of the year and the 2nd coolest. Compared with November, it is cooler and about as wet; January brings highs of 5°C (41°F) and 69 mm (2.7 in) of rain.
Figures are long-term averages for Brussels, the largest city in Brussels Capital. See below for other places.
Is December a good time to visit Brussels Capital?
least pleasant month Weather score 32/100.
December is one of the least pleasant months for weather in Brussels Capital. For better conditions, consider Apr–Sep.
Does it rain a lot in Brussels Capital in December?
Some rain is normal: about 78 mm (3.1 in) falls in an average December. It is the 2nd wettest month of the year.
How warm is Brussels Capital in December?
Days average 6°C (42°F) and nights 1°C (34°F).
Brussels Capital weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 5°C (41°F) | 0°C (32°F) | 69 mm | 77% | least pleasant |
| February | 7°C (44°F) | 0°C (32°F) | 60 mm | 74% | least pleasant |
| March | 10°C (50°F) | 2°C (35°F) | 55 mm | 69% | fair |
| April | 15°C (59°F) | 5°C (40°F) | 38 mm | 64% | best |
| May | 19°C (65°F) | 8°C (47°F) | 59 mm | 69% | best |
| June | 22°C (71°F) | 12°C (53°F) | 63 mm | 69% | best |
| July | 24°C (74°F) | 14°C (56°F) | 75 mm | 67% | best |
| August | 23°C (74°F) | 13°C (56°F) | 79 mm | 66% | best |
| September | 20°C (68°F) | 10°C (50°F) | 55 mm | 63% | best |
| October | 15°C (59°F) | 7°C (45°F) | 63 mm | 70% | fair |
| November | 10°C (49°F) | 4°C (39°F) | 69 mm | 77% | least pleasant |
| December | 6°C (42°F) | 1°C (34°F) | 78 mm | 77% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Brussels Capital in December
Weather can differ a lot within Brussels Capital: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Brussels | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |
| Anderlecht | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |
| Schaerbeek | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |
| Molenbeek-Saint-Jean | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |
| Ixelles | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |
| Uccle | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |
| Woluwe-Saint-Lambert | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |
| Forest | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |
| Jette | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |
| Saint-Gilles | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |
| Etterbeek | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |
| Evere | 6°C (42°F) | 1°C (34°F) | 78 mm | least pleasant |