Weather in Liège for September 2025
Until now, September 2025 in Liège 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 Liège predicts a temperature of 17.4 °C, which is cooler than the historical average.
In general, the average temperature in Liège 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.
Liège experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 84.3 mm.
Temperatures
Rain 🌧️
Liège Weather September
Temperatures trend during September in Liège
September weather in Liège day by day
| 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 | |
| Next | |||||
Guide for Liège in September
In Liège, Belgium, September marks the transition from summer to autumn, bringing about noticeable changes in the weather. At the beginning of the month, the average temperature hovers around 16°, with mild and pleasant conditions.
However, as the month progresses, the temperatures gradually begin to drop. By the end of September, the average temperature in Liège typically decreases to around 13°, signaling the onset of cooler autumn weather.
In terms of precipitation, Liège experiences moderate rainfall throughout September. At the start of the month, occasional showers are common, but as September progresses, the frequency of rainfall tends to increase.
Towards the end of the month, the city often experiences more consistent and heavier rainfall, contributing to the autumnal atmosphere.
Overall, September in Liège offers a mix of mild temperatures at the beginning of the month, transitioning to cooler and wetter conditions by the end.
Travelers visiting Liège during this time should be prepared for varying weather patterns and may want to pack layers and waterproof clothing to accommodate the changing climate.
Liège in September - FAQ
September rainfall patterns in Liège
UV exposure in Liège during September
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