WhatAWeatherClimate in Brussels
Brussels has a temperate oceanic climate similar to Amsterdams, with mild summers (average highs of 22 degrees Celsius) and mild winters (average lows of 1 degree). Annual thermal range is small.
Annual rainfall is around 850 mm over more than 140 rainy days. Atlantic depressions follow one another and westerly/south-westerly winds dominate. Snow is scarce but can disrupt traffic when it arrives.
Winter fog is frequent in the Senne basin, reducing visibility for aviation at Brussels South Charleroi and Zaventem. Atlantic storms can deliver gusts above 100 km/h.
Best time to visit is May to September. Use the hourly forecast, rain probability and wind before planning the Grand Place, the Atomium or a museum route at Cinquantenaire.