Monthly climate guide
Brussels weather in May
Expect mild weather in Brussels in May: afternoons reach about 19°C (65°F), while nights drop to around 8°C (46°F). Around 54 mm of rain falls over the month (some rain), and skies are often cloudy. Daytime highs are 3°C warmer than April and 3°C cooler than June.
What stands out in May
- Just 90 km apart, but Brussels runs about 5°C warmer than Knokke-Heist this month.
- Comfortable temperatures make it easy to walk between Manneken Pis and Grand-Place.
- Evenings cool off sharply: the daily range is around 11°C, so pack a layer.
- May brings late spring to Brussels.
Avg high
19°C
65°F
Avg low
8°C
46°F
Rainfall
54 mm
some rain
Humidity
76%
relative
Sky
67%
cloud · often cloudy
Brussels weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 6°C / 43°F | 1°C / 33°F | 71 mm | 93% | 80% |
| February | 7°C / 45°F | 0°C / 32°F | 54 mm | 89% | 71% |
| March | 11°C / 52°F | 2°C / 35°F | 49 mm | 84% | 66% |
| April | 15°C / 60°F | 5°C / 40°F | 34 mm | 77% | 63% |
| May | 19°C / 65°F | 8°C / 46°F | 54 mm | 76% | 67% |
| June | 22°C / 71°F | 11°C / 52°F | 69 mm | 75% | 70% |
| July | 24°C / 74°F | 13°C / 56°F | 72 mm | 74% | 67% |
| August | 24°C / 74°F | 13°C / 56°F | 68 mm | 74% | 65% |
| September | 21°C / 69°F | 11°C / 51°F | 52 mm | 78% | 61% |
| October | 16°C / 60°F | 8°C / 46°F | 64 mm | 85% | 71% |
| November | 10°C / 51°F | 4°C / 39°F | 56 mm | 91% | 74% |
| December | 7°C / 45°F | 2°C / 36°F | 84 mm | 93% | 79% |
What to pack for May
- A warm sweater or fleece for layering
- A mid-weight jacket
- A small travel umbrella, just in case
Is May a good time to visit Brussels?
Our Brussels guide recommends: May to September for the mildest weather; Brussels sees rain in every season, so pack a light jacket.
Try fries from a friterie and waffles from a proper bakery rather than the tourist stalls around the Grand-Place.
Best time to visit Brussels →Other Belgium cities in May
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Brussels weather in May. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/belgium/brussels/may
<a href="https://weathercompare.eu/weather/belgium/brussels/may">Brussels weather in May</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/belgium/brussels" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Brussels weather in May"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/belgium/brussels/may">Brussels weather in May</a> – WeatherCompare</p>
Brussels in May: quick answers
Is May a good time to visit Brussels?
Yes. May is one of the best months for Brussels, with highs around 19°C and about 54 mm of rain.
How warm is Brussels in May?
Average highs are about 19°C (65°F) and average lows about 8°C (46°F), based on 10 years of daily data.
Does it rain a lot in Brussels in May?
Brussels typically gets around 54 mm of rain in May — some rain.
When is the best time to visit Brussels?
May to September for the mildest weather; Brussels sees rain in every season, so pack a light jacket.
Figures are long-term averages for the area around Brussels (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.