Weather in Belgium for September 2025
In general, the average temperature in Belgium at the beginning of September is 25.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.3 °C by the end of September.
Belgium experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 79 mm.
Temperatures
Rain 🌧️
Belgium Weather September
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  25° | 2 26° | 3  25° | 4 25° | 5 26° | 6 25° | 7 27° |
| 8 25° | 9 22° | 10  22° | 11 21° | 12 22° | 13 20° | 14  19° |
| 15 21° | 16  20° | 17 21° | 18 21° | 19 21° | 20  20° | 21 20° |
| 22 20° | 23 19° | 24 18° | 25  19° | 26 19° | 27 17° | 28 16° |
| 29 16° | 30 16° |
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Temperatures trend during September in Belgium
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 25° /14° | 10 mm | 7 | |
| 2 Sept. | Sunny | 26° /15° | 1.2 mm | 6 | |
| 3 Sept. | Patchy rain possible | 25° /14° | 0.3 mm | 6 | |
| 4 Sept. | Sunny | 25° /13° | 0.4 mm | 6 | |
| 5 Sept. | Sunny | 26° /14° | 5.1 mm | 6 | |
| 6 Sept. | Sunny | 25° /15° | 4.5 mm | 6 | |
| 7 Sept. | Sunny | 27° /14° | 1.1 mm | 7 | |
| 8 Sept. | Sunny | 25° /15° | 3.5 mm | 6 | |
| 9 Sept. | Patchy rain possible | 22° /15° | 2.6 mm | 5 | |
| 10 Sept. | Heavy rain at times | 22° /15° | 2.2 mm | 5 | |
| 11 Sept. | Patchy rain possible | 21° /13° | 2.5 mm | 5 | |
| 12 Sept. | Patchy rain possible | 22° /11° | 0.5 mm | 5 | |
| 13 Sept. | Sunny | 20° /11° | 5 mm | 5 | |
| 14 Sept. | Moderate or heavy rain shower | 19° /12° | 4.8 mm | 5 | |
| 15 Sept. | Heavy rain at times | 21° /11° | 0.8 mm | 5 | |
| 16 Sept. | Overcast | 20° /11° | 0.9 mm | 5 | |
| 17 Sept. | Patchy rain possible | 21° /12° | 1.7 mm | 5 | |
| 18 Sept. | Patchy rain possible | 21° /12° | 1.3 mm | 5 | |
| 19 Sept. | Patchy rain possible | 21° /11° | 0.1 mm | 5 | |
| 20 Sept. | Cloudy | 20° /11° | 0 mm | 5 | |
| 21 Sept. | Sunny | 20° /10° | 4.4 mm | 5 | |
| 22 Sept. | Sunny | 20° /10° | 0.8 mm | 5 | |
| 23 Sept. | Overcast | 19° /10° | 4.1 mm | 4 | |
| 24 Sept. | Patchy rain possible | 18° /11° | 2.6 mm | 5 | |
| 25 Sept. | Partly cloudy | 19° /11° | 5.4 mm | 5 | |
| 26 Sept. | Patchy rain possible | 19° /12° | 4.8 mm | 5 | |
| 27 Sept. | Moderate or heavy rain shower | 17° /10° | 3.9 mm | 4 | |
| 28 Sept. | Patchy rain possible | 16° /9° | 1.4 mm | 4 | |
| 29 Sept. | Moderate or heavy rain shower | 16° /7° | 1.7 mm | 4 | |
| 30 Sept. | Overcast | 16° /7° | 1.5 mm | 4 | |
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Guide for Belgium in September
In Belgium, September marks the transition from summer to autumn, bringing about a noticeable change in the weather. At the beginning of the month, the weather in Belgium is generally mild and pleasant, with average temperatures ranging from 15° to 20°.
The days are still relatively long, providing ample opportunity for outdoor activities and sightseeing. However, occasional rainfall can be expected, so it's advisable to pack an umbrella or raincoat.
As the month progresses towards the end of September, the temperatures in Belgium begin to gradually decrease. By the end of the month, the average temperatures typically range from 10° to 15°.
The days become shorter, and there is a higher chance of experiencing overcast skies and intermittent showers. It's important for travelers to be prepared for cooler weather and to dress in layers to stay comfortable while exploring the country.
Overall, September in Belgium offers a mix of mild temperatures, occasional rainfall, and the beautiful transition of landscapes as the autumn colors start to emerge. It's a great time to experience the charm of Belgian cities and countryside before the onset of colder weather.
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Belgium in September - FAQ
September rainfall patterns in Belgium
UV exposure in Belgium during September
Quick links
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