Brussels experiences a mild oceanic climate typical of northern Europe, with cold winters and warm summers.
Brussels in winter
It is cold in Brussels from approximately late October to early March, with average highs between 39°F (4°C) and 44.6°F (7°C). The beginning of autumn is generally grey, but the temperatures are mild. In late spring the temperature can suddenly rise and it can sometimes be hotter than in summer.
In December, January and February, the days are a lot shorter and the temperatures drop to 30°F (-0°C), especially during the night.
Brussels in summer
June, July and August are the hottest months in Brussels. The average high is 73.4°F (23°C) and the average low is 57°F (14°C). However, it can also get to over 90°F (30°C) and it is generally so humid that it can be strenuous to visit the city.
Rain is very frequent in this region with approximately 200 days of rain per year in the capital, so keep in mind that even if you go during summer you will have to bring an umbrella.
Best time to visit Brussels
Since Brussels has a mild oceanic climate visitors can visit the city all year round (with the correct clothing). However, we recommend travelling to the city between May and September, since the temperatures are normally warmer and thus more enjoyable.
If you don’t mind the cold, winter can be an interesting time to visit the capital of Belgium. Not only will you probably save on plane tickets, but you will get to see Brussels lit up for Christmas. Moreover, Brussels has a certain melancholic charm when it rains, making winter an attractive season for tourists.