Bruxelles-Capitale (Brussels)
September
Weather in Bruxelles-Capitale for September 2025
Your guide to Bruxelles-Capitale weather in September - trends and predictions
Until now, September 2025 in Bruxelles-Capitale is slightly cooler than the historical average by -1.4 °C.
Expect cooler weather in the next days in Bruxelles-Capitale with the forecast suggesting a temperature of 19.6 °C, lower than the historical average.
In general, the average temperature in Bruxelles-Capitale at the beginning of September is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.4 °C by the end of September.
Bruxelles-Capitale experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 79 mm.
Temperatures
Rain 🌧️
7
Dry days
23
Rainy days
0
Snow days
21°/12°
Temperatures
18 km/h
Avg max wind
71 %
Avg humidity
Bruxelles-Capitale Weather September
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Temperatures trend during September in Bruxelles-Capitale
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September weather in Bruxelles-Capitale day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 25° /14° | 8 mm | 6 | |
| 2 Sept. | Sunny | 25° /14° | 1.3 mm | 6 | |
| 3 Sept. |  Patchy rain possible | 25° /14° | 0.8 mm | 6 | |
| 4 Sept. | Sunny | 25° /13° | 0.6 mm | 6 | |
| 5 Sept. | Sunny | 25° /14° | 4.1 mm | 6 | |
| 6 Sept. | Sunny | 25° /14° | 3.6 mm | 6 | |
| 7 Sept. | Sunny | 28° /14° | 1 mm | 7 | |
| 8 Sept. | Sunny | 25° /15° | 3 mm | 6 | |
| 9 Sept. | Patchy rain possible | 21° /14° | 3.2 mm | 5 | |
| 10 Sept. |  Heavy rain at times | 22° /14° | 1.8 mm | 5 | |
| 11 Sept. | Patchy rain possible | 21° /13° | 2.5 mm | 5 | |
| 12 Sept. | Light rain shower | 21° /11° | 0.6 mm | 5 | |
| 13 Sept. | Sunny | 19° /11° | 5.2 mm | 5 | |
| 14 Sept. | Patchy rain possible | 20° /12° | 3.9 mm | 5 | |
| 15 Sept. | Patchy rain possible | 21° /12° | 1 mm | 5 | |
| 16 Sept. | Patchy rain possible | 19° /12° | 0.8 mm | 0.7 | |
| 17 Sept. |  Overcast | 22° /11° | 0.1 mm | 0.3 | |
| 18 Sept. | Sunny | 26° /13° | 0 mm | 1.1 | |
| 19 Sept. | Sunny | 31° /15° | 0 mm | 1 | |
| 20 Sept. |  Moderate rain | 21° /14° | 5.4 mm | 0.4 | |
| 21 Sept. | Patchy rain possible | 18° /10° | 0.2 mm | 3 | |
| 22 Sept. |  Partly cloudy | 16° /7° | 0 mm | 4 | |
| 23 Sept. | Partly cloudy | 16° /9° | 0 mm | 4 | |
| 24 Sept. | Patchy rain possible | 17° /10° | 0.3 mm | 3 | |
| 25 Sept. | Patchy rain possible | 13° /10° | 2.9 mm | 3 | |
| 26 Sept. | Patchy rain possible | 15° /11° | 0.4 mm | 3 | |
| 27 Sept. | Sunny | 19° /8° | 0.1 mm | 4 | |
| 28 Sept. | Sunny | 21° /11° | 0 mm | 5 | |
| 29 Sept. | Sunny | 21° /9° | 0 mm | 4 | |
| 30 Sept. | Overcast | 16° /7° | 1.5 mm | 4 | |
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Important Notice
Our weather forecast for Bruxelles-Capitale in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Bruxelles-Capitale forecast closer to your planned date for the most up-to-date weather information.
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Bruxelles-Capitale in September - FAQ
What are the expected maximum and minimum temperatures in Bruxelles-Capitale during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Bruxelles-Capitale during September?
Moderate rainfall is anticipated in Bruxelles-Capitale during September, with a total of 79 mm spread over approximately 23 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Bruxelles-Capitale during September?
The average wind speed in Bruxelles-Capitale during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Bruxelles-Capitale
Explore the daily rainfall trends and prepare for Bruxelles-Capitales September weather 💧
UV exposure in Bruxelles-Capitale during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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