Weather in Belgium for September 2025
In general, the average temperature in Belgium at the beginning of September is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.1 °C by the end of September.
Belgium sees moderate rainfall in September, averaging 8 rainy days.
Is September a good time to visit Belgium? check out the best time to travel to Belgium page.
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Belgium in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2 26° | 3  24° | 4  24° | 5 25° | 6 24° | 7 29° |
| 8 26° | 9 24° | 10 24° | 11  21° | 12  19° | 13 18° | 14  20° |
| 15  22° | 16 22° | 17 23° | 18 24° | 19 22° | 20 22° | 21  22° |
| 22 20° | 23 18° | 24 18° | 25 18° | 26 20° | 27 19° | 28 17° |
| 29 18° | 30 17° |
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Temperatures trend during September in Belgium
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 26° /15° | 20 mm | 7 | |
| 2 Sept. | Patchy rain possible | 26° /16° | 2.4 mm | 6 | |
| 3 Sept. | Mist | 24° /16° | 0.1 mm | 5 | |
| 4 Sept. | Sunny | 24° /14° | 0.8 mm | 6 | |
| 5 Sept. | Sunny | 25° /15° | 6.1 mm | 6 | |
| 6 Sept. | Sunny | 24° /15° | 2.3 mm | 6 | |
| 7 Sept. | Sunny | 29° /14° | 0.3 mm | 8 | |
| 8 Sept. | Sunny | 26° /16° | 1.9 mm | 7 | |
| 9 Sept. | Sunny | 24° /15° | 3.8 mm | 6 | |
| 10 Sept. | Sunny | 24° /15° | 1.3 mm | 6 | |
| 11 Sept. | Moderate rain at times | 21° /14° | 4.6 mm | 5 | |
| 12 Sept. | Overcast | 19° /11° | 0.9 mm | 4 | |
| 13 Sept. | Mist | 18° /10° | 1.1 mm | 5 | |
| 14 Sept. | Cloudy | 20° /12° | 0.1 mm | 5 | |
| 15 Sept. | Partly cloudy | 22° /10° | 0 mm | 5 | |
| 16 Sept. | Sunny | 22° /12° | 0.4 mm | 6 | |
| 17 Sept. | Patchy rain possible | 23° /14° | 0.9 mm | 5 | |
| 18 Sept. | Patchy rain possible | 24° /14° | 0.5 mm | 6 | |
| 19 Sept. | Patchy rain possible | 22° /13° | 0 mm | 6 | |
| 20 Sept. | Cloudy | 22° /13° | 0 mm | 6 | |
| 21 Sept. | Moderate rain | 22° /12° | 8.7 mm | 5 | |
| 22 Sept. | Light rain shower | 20° /12° | 1.5 mm | 5 | |
| 23 Sept. | Patchy rain possible | 18° /11° | 7 mm | 4 | |
| 24 Sept. | Partly cloudy | 18° /10° | 1.2 mm | 5 | |
| 25 Sept. | Overcast | 18° /11° | 9.9 mm | 4 | |
| 26 Sept. | Partly cloudy | 20° /13° | 3.4 mm | 5 | |
| 27 Sept. | Partly cloudy | 19° /11° | 3 mm | 5 | |
| 28 Sept. | Partly cloudy | 17° /10° | 2.3 mm | 5 | |
| 29 Sept. | Light rain shower | 18° /8° | 0.7 mm | 4 | |
| 30 Sept. | Partly cloudy | 17° /9° | 2.4 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.
Belgium in September - FAQ
What to pack to Belgium in September?
As you prepare for your trip to Belgium in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Belgium, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Belgium
UV exposure in Belgium during September
Quick links
Where is Belgium?Get accurate weather forecasts for Belgium, located at latitude 50.85 and longitude 4.349. Stay updated with localized weather information tailored for Belgium.