Brussels in september: average Weather, Temperature and Climate
Weather in Brussels in september 2025
The weather in Brussels in september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather
Weather at 6am
56°F
Partly Cloudy
27% of time
26%
18%
13%
Weather at 12pm
68°F
Clear/Sunny
33% of time
29%
25%
10%
Weather at 6pm
63°F
Clear/Sunny
35% of time
27%
23%
10%
Weather at 3am
56°F
31%
24%
22%
14%
Evolution of daily average temperature and precipitation in Brussels in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Brussels in september.
The climate of Brussels in september is good
The weather in september in Brussels is wet (with 2.7in of precipitation over 5 days). It should be noted an improvement from the previous month since in august it receives an average of 4.4in of rainfall over 7 days.
The climate quite comfortable in that area september. Temperatures are up to 70°F. The minimum is 56°F. Thus, the mean temperature average on this month of september in Brussels is 63°F. Note that seasonal normals are in contrast with those observed in Brussels in the month of september with a maximum record of 90°F in 2013 and a minimum record of 41°F in 2018. You can plan to have about 23 days with temperatures over 65°F, or 77% of the month.
On average, in Brussels, the days of september last 12:38. Sunrise is at 06:18 and sunset is at 18:56.
With good weather conditions, the month of september is a good month to go in that area.
Seasonal average climate and temperature of Brussels in september
Check below seasonal norms These datas are compiled from the weather statements earlier years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 63°F | ||||
| Highest temperature | 70°F | ||||
| Lowest temperature | 56°F | ||||
| Highest record temperature | 90°F (2013) | ||||
| Lowest record temperature | 41°F (2018) | ||||
| Number of days at +86°F | 1 day(s) (3%) | ||||
| Number of days at +65°F | 23 day(s) (77%) | ||||
| Sea temperature | |||||
| Average sea temperature | 65°F | ||||
| Lowest sea temperature | 63°F | ||||
| Highest sea temperature | 68°F | ||||
| Wind | |||||
| Wind speed | 16km/h | ||||
| Wind temperature | 54°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 2.7in | ||||
| Number of days with rainfall | 5 day(s) (15%) | ||||
| Record daily rainfall | 1.2in (2020) | ||||
| Snowfall | 0cm | ||||
| Other climate data | |||||
| Humidity | 90% | ||||
| Visibility | 8.83km | ||||
| Cloud cover | 41% | ||||
| UV index | 5 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:18 | ||||
| Time of sunset | 18:56 | ||||
| Length of day | 12:38 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Brussels in september 2024:
63°F to 88°F
67°F to 81°F
67°F to 76°F
61°F to 72°F
59°F to 72°F
61°F to 70°F
58°F to 79°F
61°F to 72°F
58°F to 65°F
52°F to 63°F
49°F to 59°F
45°F to 58°F
45°F to 61°F
50°F to 63°F
49°F to 67°F
54°F to 65°F
56°F to 72°F
56°F to 76°F
56°F to 76°F
54°F to 74°F
56°F to 77°F
59°F to 74°F
59°F to 65°F
56°F to 63°F
54°F to 59°F
58°F to 65°F
52°F to 56°F
49°F to 56°F
43°F to 58°F
50°F to 58°F
Map: other cities in Belgium in september
Cities near Brussels:
| Hoeilaart in september | good weather |
| Mechelen in september | good weather |
| Aalst in september | good weather |
| Leuven in september | good weather |
| Dendermonde in september | good weather |
| Louvain-la-Neuve in september | good weather |
| Villers-la-Ville in september | good weather |
| Geraardsbergen in september | good weather |
| Sint-Niklaas in september | good weather |
| Antwerp in september | good weather |
| Tienen in september | good weather |
| La Louvière in september | good weather |
Click over cities on the map for information about the weather in september.
Brussels
perfect weather
good
tolerable
bad
very bad
Weather data for Brussels in september:
Weather data for Brussels for september are derived from an average of the weather forecast since 2009 in Brussels. There is a margin of error and these forecasts are to be considered as general information only. The weather in Brussels can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Brussels.