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Weather in Belgium for September 2025

Your guide to Belgium weather in September - trends and predictions
  • 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.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/14°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
68 %
Avg humidity

Belgium in September average weather

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Temperatures trend during September in Belgium

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
26° /15° 20 mm 7
2 Sept. Patchy rain possible
Patchy rain possible
26° /16° 2.4 mm 6
3 Sept. Mist
Mist
24° /16° 0.1 mm 5
4 Sept. Sunny
Sunny
24° /14° 0.8 mm 6
5 Sept. Sunny
Sunny
25° /15° 6.1 mm 6
6 Sept. Sunny
Sunny
24° /15° 2.3 mm 6
7 Sept. Sunny
Sunny
29° /14° 0.3 mm 8
8 Sept. Sunny
Sunny
26° /16° 1.9 mm 7
9 Sept. Sunny
Sunny
24° /15° 3.8 mm 6
10 Sept. Sunny
Sunny
24° /15° 1.3 mm 6
11 Sept. Moderate rain at times
Moderate rain at times
21° /14° 4.6 mm 5
12 Sept. Overcast
Overcast
19° /11° 0.9 mm 4
13 Sept. Mist
Mist
18° /10° 1.1 mm 5
14 Sept. Cloudy
Cloudy
20° /12° 0.1 mm 5
15 Sept. Partly cloudy
Partly cloudy
22° /10° 0 mm 5
16 Sept. Sunny
Sunny
22° /12° 0.4 mm 6
17 Sept. Patchy rain possible
Patchy rain possible
23° /14° 0.9 mm 5
18 Sept. Patchy rain possible
Patchy rain possible
24° /14° 0.5 mm 6
19 Sept. Patchy rain possible
Patchy rain possible
22° /13° 0 mm 6
20 Sept. Cloudy
Cloudy
22° /13° 0 mm 6
21 Sept. Moderate rain
Moderate rain
22° /12° 8.7 mm 5
22 Sept. Light rain shower
Light rain shower
20° /12° 1.5 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
18° /11° 7 mm 4
24 Sept. Partly cloudy
Partly cloudy
18° /10° 1.2 mm 5
25 Sept. Overcast
Overcast
18° /11° 9.9 mm 4
26 Sept. Partly cloudy
Partly cloudy
20° /13° 3.4 mm 5
27 Sept. Partly cloudy
Partly cloudy
19° /11° 3 mm 5
28 Sept. Partly cloudy
Partly cloudy
17° /10° 2.3 mm 5
29 Sept. Light rain shower
Light rain shower
18° /8° 0.7 mm 4
30 Sept. Partly cloudy
Partly cloudy
17° /9° 2.4 mm 4
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Important Notice
Our weather forecast for Belgium 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 Belgium forecast closer to your planned date for the most up-to-date weather information.

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

Is September a good time to visit Belgium?
Yes, September is a good time to traveling to Belgium, read more about the best time to visit Belgium.
What are the expected maximum and minimum temperatures in Belgium during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Belgium during September?
Moderate rainfall is anticipated in Belgium during September, with a total of 70 mm spread over approximately 8 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Belgium during September?
The average wind speed in Belgium during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

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
Regions in Belgium
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Location coordinates 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.

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