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BelgiumThe weather in September in Brussels-Capital Region
It's pleasantly warm in September in Brussels-Capital Region with an average temperature of 21°C. Temperatures this month range from a low of 18°C to a high of 23°C. At night, you can expect temperatures between 10°C and 15°C.
Looking for great weather? September is a good time to be in Brussels-Capital Region. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Brussels-Capital Region, Belgium. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 35°C in 2020, Brussels-Capital Region reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 11°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of 3°C to a highest value of 20°C.
Rainfall amount
In September, there is an average of 57 mm of precipitation, spread over 9 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in September for Brussels-Capital Region
Click on any day in September to get detailed info about the usual weather on that day in Brussels-Capital Region. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Brussels-Capital Region | New York | |
|---|---|---|
| Average temperature | 21°C | 27°C |
| Max. temperature | 23°C | 31°C |
| Min. temperature | 10°C | -5°C |
| Total precipitation | 57 mm | 57 mm |
| Rainy days | 9 days | 9 days |
Start of September
The month of September starts in Brussels-Capital Region with warm temps, averaging around 22°C during the day and nights around 14°C.
Mid September
By mid-September, daytime temps stay steady at around 22°C, with nights around 13°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Brussels-Capital Region is around 19°C, while nighttime temps are about 11°C. A shower might pop up, but overall, the weather will be dry and sunny.
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Check out the climate of Brussels-Capital Region for all months and discover the best travel time
Curious about the weather in other parts of Belgium? Check out the climate and weather for spots like Ardennes, Bruges, Antwerp, or explore other destinations in Belgium.
Temperature charts
These charts show the average temperatures in September in Brussels-Capital Region, Belgium. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Brussels-Capital Region
Temperature in September in Brussels-Capital Region over the years
Precipitation charts
These charts show the average amount of precipitation in September in Brussels-Capital Region, Belgium. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Brussels-Capital Region
Total precipitation in September in Brussels-Capital Region over the years
Daily UV index in September in Brussels-Capital Region
This chart shows the average daily UV index in September in Brussels-Capital Region, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Brussels-Capital Region
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Average weather in Brussels-Capital Region by month
Click on a month below to see detailed weather info for Brussels-Capital Region. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.