Verdict: Excellent month
Brussels Weather in August
August hits the sweet spot in Brussels — highs around 24°C (75°F), ideal for a full day on foot. Expect showers on roughly 13 days of the month — rarely trip-ruining, worth planning around. Overall, August is one of the best months of the year to be in Brussels.
Average high
24°C / 75°F
Average low
15°C / 59°F
Rain days
~13
Precipitation
57 mm
What to pack for Brussels in August
- Summer clothes, plus one light layer for air-con and evenings
- Rain gear is non-negotiable — expect rain on roughly 13 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
August 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)