Wallonia (Liège)
September
Weather in Wallonia for September 2025
Your guide to Wallonia weather in September - trends and predictions
Until now, September 2025 in Wallonia is cooler than usual, with temperatures averaging 20.9 °C, this is -2.2 °C below the typical seasonal average.
The forecast for the next days in Wallonia predicts a temperature of 17.4 °C, which is cooler than the historical average.
In general, the average temperature in Wallonia at the beginning of September is 25 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.4 °C by the end of September.
Wallonia experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 84.3 mm.
Temperatures
Rain 🌧️
5
Dry days
25
Rainy days
0
Snow days
21°/11°
Temperatures
15 km/h
Avg max wind
75 %
Avg humidity
Wallonia Weather September
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What’s the Weather Like in Wallonia This September?
Discover the average temperatures and weather trends across Wallonia’s cities this September.
Temperatures trend during September in Wallonia
See the weather trend as well as the moving average line
September weather in Wallonia day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 23° /12° | 8.1 mm | 6 | |
| 2 Sept. |  Patchy rain possible | 25° /13° | 2.8 mm | 6 | |
| 3 Sept. | Patchy rain possible | 24° /14° | 0.8 mm | 6 | |
| 4 Sept. |  Partly cloudy | 24° /12° | 2.1 mm | 6 | |
| 5 Sept. | Light rain shower | 26° /12° | 2.4 mm | 6 | |
| 6 Sept. | Partly cloudy | 25° /12° | 3 mm | 6 | |
| 7 Sept. | Sunny | 28° /13° | 1.3 mm | 7 | |
| 8 Sept. | Sunny | 25° /14° | 1.7 mm | 6 | |
| 9 Sept. | Light rain shower | 21° /13° | 6.7 mm | 5 | |
| 10 Sept. |  Moderate or heavy rain shower | 22° /12° | 3.5 mm | 5 | |
| 11 Sept. | Patchy rain possible | 21° /11° | 5.7 mm | 5 | |
| 12 Sept. | Light rain shower | 21° /10° | 1.5 mm | 5 | |
| 13 Sept. | Light rain shower | 19° /9° | 3.6 mm | 5 | |
| 14 Sept. | Moderate or heavy rain shower | 19° /10° | 4.6 mm | 4 | |
| 15 Sept. | Moderate or heavy rain shower | 21° /10° | 1.9 mm | 5 | |
| 16 Sept. | Patchy rain possible | 18° /11° | 1.7 mm | 0.7 | |
| 17 Sept. |  Overcast | 17° /9° | 0 mm | 0.4 | |
| 18 Sept. | Sunny | 25° /12° | 0 mm | 1.1 | |
| 19 Sept. | Sunny | 27° /12° | 0 mm | 1.1 | |
| 20 Sept. |  Moderate rain | 23° /16° | 9.7 mm | 0.5 | |
| 21 Sept. | Patchy rain possible | 17° /12° | 0.4 mm | 3 | |
| 22 Sept. | Patchy rain possible | 17° /8° | 0.4 mm | 3 | |
| 23 Sept. | Patchy rain possible | 14° /6° | 0.5 mm | 2 | |
| 24 Sept. | Patchy rain possible | 15° /5° | 0.7 mm | 2 | |
| 25 Sept. | Patchy rain possible | 15° /4° | 0.5 mm | 2 | |
| 26 Sept. | Patchy rain possible | 14° /8° | 0.2 mm | 3 | |
| 27 Sept. | Partly cloudy | 14° /4° | 0 mm | 3 | |
| 28 Sept. | Partly cloudy | 15° /4° | 0 mm | 3 | |
| 29 Sept. | Patchy rain possible | 12° /9° | 0.1 mm | 3 | |
| 30 Sept. | Partly cloudy | 16° /6° | 0.6 mm | 4 | |
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Important Notice
Our weather forecast for Wallonia 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 Wallonia forecast closer to your planned date for the most up-to-date weather information.
Change Month
Wallonia in September - FAQ
What are the expected maximum and minimum temperatures in Wallonia during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Wallonia during September?
Moderate rainfall is anticipated in Wallonia during September, with a total of 84.3 mm spread over approximately 25 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Wallonia during September?
The average wind speed in Wallonia during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Wallonia
Explore the daily rainfall trends and prepare for Wallonias September weather 💧
UV exposure in Wallonia during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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