Brussels weather in September (Brussels Region, Belgium)

What can you expect from the weather in Brussels during September? Check out this comprehensive weather guide.

In Brussels the weather in September is generally perfect, with pleasant temperatures and moderate rainfall. Anticipate daytime temperatures around 21°C, while night temperatures can drop to 11°C.

Brussels in September usually receives moderate rainfall, averaging around 61 mm for the month. Based on our climate data of the past 30 years, about 16 days of rain are anticipated.

The area experiences a moderate amount of sunshine, with approximately 142 hours of sunlight expected. This makes it neither too gloomy nor overly bright.

If you favor pleasant temperatures and minimal rainfall, September is one of the better months to visit Brussels. June, July, August and September typically offer the most agreeable circumstances. On the other hand, January, February and December tend to be characterized by conditions that may not be as optimal.

For an in-depth look at the yearly conditions, visit our specialized Brussels climate page with graphs.

 

Brussels, monthly averages in September

Min TemperatureMin Temperature 11°C  
Max TemperatureMax Temperature 21°C  
Chance of RainChance of Rain 52%  
PrecipitationPrecipitation 61 mm  
Rainy daysRainy days 16 days  
HumidityHumidity 77%  
WindspeedWindspeed 11 km/h  
SunshineSunshine 142 hours  
Percentage SunshinePercentage Sunshine  

Where to go in Belgium in September

Find out more about the weather in Belgium in September and which places have the best weather conditions in this month.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Brussels in September?

For visitors traveling to Brussels, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming
6/10
Cycling
10/10
Walking
10/10
Camping
8/10
Outdoor sports
10/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Brussels.

Our site offers climate and forecast data for every country in the world. Are you going to Belgium? On this website you can find historical weather averages for many cities in Belgium. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.