Brussels weather in December
December in Brussels: cold, rainy, with clean air — a fair time to visit.
#11 of 12 months in Brussels · #453 of 604 destinations to visit in December · comfort 54/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Brussels climate normals — December
| Daytime high | 8°C / 46°F | 🧥 cold |
|---|---|---|
| Nighttime low | 4°C / 39°F | |
| Feels like (high) | 4°C / 39°F | |
| Rainfall | 85 mm / 3.3 in | 🌧 rainy |
| Rainy days | 16 days | |
| Humidity | 86% | 💦 very humid |
| Dew point | 3°C / 38°F | |
| Sunshine | 2.9 h/day | |
| Daylight | 8 h | |
| Wind | 23 km/h / 14 mph | |
| Snowfall | 1.8 cm / 0.7 in | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Brussels in December — FAQ
- Is December a good time to visit Brussels?
- December in Brussels: cold, rainy, with clean air — a fair time to visit. It ranks #11 of 12 months for Brussels on SeasonMap's comfort score (54/100).
- What is the weather like in Brussels in December?
- In December, Brussels averages a daily high of 7.9°C and a low of 3.7°C, with about 84.5 mm of rain over roughly 16.4 rainy days.
- What is the air quality in Brussels in December?
- Brussels has a mean US Air Quality Index of about 38 in December.
- Does it snow in Brussels in December?
- Brussels sees roughly 1.8 cm of snowfall in December.