Brussels weather
11-year climate averages (2015–2025), month by month
Brussels in september
Current month averages, based on 11 complete years of records (2015–2025). Read the full guide →
Brussels sits at 50°51′N 4°21′E in Belgium, in Europe. Its climate profile is shaped by these coordinates — and the 11 complete years of records below (2015–2025) reveal exactly how each season feels on the ground.
Below, you'll find monthly averages for temperature, rainfall and sunshine, drawn from the Open-Meteo Archive. Every month links to a full guide with what to pack, where to stay, and when to arrive.
The year in weather
Brussels weather by month
Pick a month for the full climate guide — temperature, rainfall, sunshine, packing tips and hotel deals for Brussels.
Places that feel like Brussels in september
Brussels weather — FAQ
Q01What is the hottest month in Brussels?
What is the hottest month in Brussels?
August runs the highest averages in Brussels, with typical daytime highs of 24°C (74°F). Plan around midday and consider accommodation with reliable cooling.
Q02What is the coldest month in Brussels?
What is the coldest month in Brussels?
January brings the lowest averages, with daytime highs near 6°C (43°F). Layer up and expect shorter daylight hours if you plan sightseeing.
Q03Which month has the most rain in Brussels?
Which month has the most rain in Brussels?
January typically records the highest monthly rainfall — around 82mm on average. Plan indoor alternatives and pack proper rain gear if visiting this month.
Q04What is the climate like in Brussels?
What is the climate like in Brussels?
Brussels, Belgium has mild summers, cold winters. You can read the detailed month-by-month breakdown on this page.