Brussel Weather: September
 |
Average Day Temperature: | 69.6°F |
|
Average Night Temperature: | 56.4°F |
|
Sea Water Temperature: | 66.7°F |
|
Number of Sunny Days: | 11 days |
| Sunshine Hours: | 11.7 - 13.5 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 1.5 in | |
| detailed information | ||
forecast
| Brussel |
Temperature
| Brussel |
Air Temperature in September, °F
The highest day temperature in September 2025 was 91°F. The lowest night temperature was 48°F. The average values for day and night temperatures during September were 70.4°F и 55.6°F respectivly.
Brussel Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Brussel was 66.7°F. The maximum and minimum values were 62.4°F and 70.4°F respectively.
You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Brussel is 1.5 in. It makes september one of the least rainy months of the year.
The average wind speed in September is 8.4 mph. It makes September one of the most windless months of the year for Brussel.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Brussel in September is 7.2 hours.
Brussel on the Weather Map
| Antwerpen |  |
+38 |
| Brugge | |
+36 |
| Brussel | |
+36 |
| Charleroi |  |
+36 |
| Gent | |
+36 |
| Kortrijk | |
+36 |
| Liege | |
+38 |
| Namur | |
+40 |
| Oostende | |
+40 |
| 0900 |  |
36°F | N 7 mph |
| 1200 | |
42°F | N 10 mph |
| 1500 | |
44°F | N 10 mph |
| 1800 |  |
40°F | N 12 mph |
| 2100 |  |
40°F | N 17 mph |
| 0000 | |
40°F | N 22 mph |
| 0300 |  |
42°F | N 22 mph |
| 0600 | |
44°F | N 18 mph |