Brussels weather in May
May in Brussels: nice, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Brussels · #167 of 604 destinations to visit in May · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Brussels climate normals — May
| Daytime high | 18°C / 64°F | 😎 nice |
|---|---|---|
| Nighttime low | 8°C / 47°F | |
| Feels like (high) | 16°C / 61°F | |
| Rainfall | 55 mm / 2.2 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 9°C / 48°F | |
| Sunshine | 11.2 h/day | |
| Daylight | 15.5 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 50 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Brussels in May — FAQ
- Is May a good time to visit Brussels?
- May in Brussels: nice, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Brussels on SeasonMap's comfort score (86/100).
- What is the weather like in Brussels in May?
- In May, Brussels averages a daily high of 17.7°C and a low of 8.4°C, with about 55 mm of rain over roughly 10.8 rainy days.
- What is the air quality in Brussels in May?
- Brussels has a mean US Air Quality Index of about 50 in May.