Brussels weather in August
August in Brussels: nice, a little rain, with clean air — one of the best months to visit.
#2 of 12 months in Brussels · #48 of 604 destinations to visit in August · comfort 91/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Brussels climate normals — August
| Daytime high | 24°C / 75°F | 😎 nice |
|---|---|---|
| Nighttime low | 15°C / 59°F | |
| Feels like (high) | 23°C / 73°F | |
| Rainfall | 66 mm / 2.6 in | 🌦 some rain |
| Rainy days | 13 days | |
| Humidity | 70% | 💧 humid |
| Dew point | 14°C / 56°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 14.5 h | |
| Wind | 17 km/h / 11 mph | |
| Air quality (US AQI) | 47 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Brussels in August — FAQ
- Is August a good time to visit Brussels?
- August in Brussels: nice, a little rain, with clean air — one of the best months to visit. It ranks #2 of 12 months for Brussels on SeasonMap's comfort score (91/100).
- What is the weather like in Brussels in August?
- In August, Brussels averages a daily high of 23.7°C and a low of 15.1°C, with about 66.4 mm of rain over roughly 13.4 rainy days.
- What is the air quality in Brussels in August?
- Brussels has a mean US Air Quality Index of about 47 in August.