Cool
Average highs are around 19°C, so pack for cooler days.
September verdict
Belgium in September
Weather score40Mixed
Mixed for holiday weather
Average highs are around 19°C, so pack for cooler days. Sunshine averages 5.1h per day, enough for a balanced month. Rainfall averages 64mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
19°C
Rain
64mm
Sun
5.1h
Sea
11°C
Weather score
40
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 64mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5.1h per day, enough for a balanced month.
Cool sea
Sea temperatures average 11°C, so the water can feel cool.
Map
Weather map
Compare Belgium with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September19°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
September64mm average rain
September is close to Belgium's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
September5.1 hours average sun
September sits close to Belgium's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September11°C average sea
September is one of Belgium's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 11°C in this stretch, so swimming comfort is at its strongest.
Weather score
September40 weather score
September sits close to Belgium's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
