Weather in Brussels in May 2025
Average weather
Average temperature in Brussels in May
Going from a maximum of +25°C during the day to a minimum of +3°C during the night, the temperature in May averages around +19°C.
The average maximum temperature goes up 36% by the end of the month, compared with the beginning of the month, from +17°C to +25°C.
Is Brussels warm or cold in May?
Brussels is typically mild in May.
Maximum temperatures go up compared to the previous month from +14°C to +18°C. The minimum temperature also goes up from +5°C to +9°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how May is compared to other months in Brussels:
Climate in Brussels in May
| April | May | June | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +14°C | +18°C | +21°C | ||||
| Min. temperature | ||||||
| -3°C | -1°C | +3°C | ||||
| Max. temperature | ||||||
| +28°C | +32°C | +34°C | ||||
| Rainfall | ||||||
| 50 mm | 63 mm | 71 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 2 m/s | ||||
| Humidity | ||||||
| 71% | 72% | 73% | ||||
| Air pressure | ||||||
| 1014 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 5 | 5 | 5 | ||||
| Cloudy days | ||||||
| 8 | 7 | 7 | ||||
| Rainy days | ||||||
| 16 | 16 | 15 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
May often has better weather than April. It’s getting warmer as May arrives. The average maximum temperature goes up from +14°C to +18°C during the day. Prepare for more rain. Average rainfall goes from 50 mm to 63 mm. Humidity rises from 71% to 72%. The average wind speed doesn’t change much during May, staying around 3 m/s. The amount of sunny days stay about the same, averaging 5 sunny days during the month.
June brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Brussels is gradually increasing during May, going from 2 m/s to 3 m/s over the course of the month.
Rain
How was the weather last May in Brussels?
Climate Change over Years
The climate in Brussels in May has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+13°C) and the highest in 2022 (+17°C). The driest year was 1996 with only 558 mm of rainfall, and the wettest year was 2022 with 1284 mm.
FAQ
Is May a good time to visit Brussels?
Can you sunbathe in Brussels in May?
Is Brussels rainy in May?
Is it sunny in Brussels in May?
Other cities in Belgium
Monthly weather in Brussels
Source of the data
For this page, we’ve looked at the typical weather in Brussels, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.