Is Brussels hot in May?
Days are typically mild at 18.6°C, while nights average 9.3°C.
Belgium · 1991–2020 normal
Typical May weather in Brussels: 18.6°C by day, 9.3°C at night, 62 mm of rain over 10 wet days. These are measured 1991–2020 station normals, not a forecast.
In the year-round weather comparison, May scores 62 out of 100 (July leads the year at 84). Daylight is calculated as 15 h 29 from latitude 50.85°.
May at a glance
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Days are typically mild at 18.6°C, while nights average 9.3°C.
The measured monthly average is 62 mm across about 10 wet days.
There are about 15 h 29 between sunrise and sunset at mid-month, calculated from the place latitude.
May ranks 5 of 12 in our weather comparison; July ranks first.
The evidence behind this page
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The weather comparison for Brussels is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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