Cool
Average highs are around 20°C, so pack for cooler days.
September verdict
Brussels, Belgium in September
Weather score45Mixed
Mixed for holiday weather
Average highs are around 20°C, so pack for cooler days. Sunshine averages 5.5h per day, enough for a balanced month. Rainfall averages 60mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
20°C
Rain
60mm
Sun
5.5h
Weather score
45
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 60mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5.5h per day, enough for a balanced month.
Map
Weather map
Compare Brussels, Belgium with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September20°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September60mm average rain
September is close to Brussels' usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
September5.5 hours average sun
September is brighter than Brussels' yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
September45 weather score
September scores above Brussels' yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
