Verdict: Fair month
Brussels Weather in January
January is properly cold in Brussels, with highs of only 7°C (45°F). Expect showers on roughly 12 days of the month — rarely trip-ruining, worth planning around. January is workable in Brussels if your dates are fixed — just plan around the conditions.
Average high
7°C / 45°F
Average low
2°C / 36°F
Rain days
~12
Precipitation
69 mm
What to pack for Brussels in January
- A proper warm jacket, and a hat for mornings
- Rain gear is non-negotiable — expect rain on roughly 12 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
January against the rest of the year
Warmest in Brussels: Aug (24°C / 75°F) · Coolest: Jan (7°C / 45°F) · Wettest: Dec (~15 rain days)
7°
2°
Jan
9°
3°
Feb
11°
4°
Mar
14°
5°
Apr
18°
9°
May
22°
13°
Jun
22°
14°
Jul
24°
15°
Aug
21°
12°
Sep
16°
10°
Oct
10°
5°
Nov
7°
3°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)