Click on a day for an hourly weather forecast
The temperatures in Belgium in September are usually low and can range between 12°C and 20°C.
You can expect about 3 to 8 days of rain in Belgium during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Belgium in September 2025.
If you’re planning to visit Belgium in the near future, we highly recommend that you review the 14 day weather forecast for Belgium before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / 1° | 9 | 16 | 6 | 90 mm | Awful | Belgium in January |
| February | 7° / 2° | 8 | 15 | 6 | 72 mm | Awful | Belgium in February |
| March | 11° / 4° | 7 | 22 | 2 | 72 mm | Awful | Belgium in March |
| April | 15° / 6° | 4 | 25 | 1 | 53 mm | Good | Belgium in April |
| May | 18° / 9° | 6 | 25 | 0 | 87 mm | Good | Belgium in May |
| June | 21° / 12° | 6 | 24 | 0 | 99 mm | Good | Belgium in June |
| July | 23° / 14° | 6 | 25 | 0 | 95 mm | Perfect | Belgium in July |
| August | 23° / 15° | 5 | 26 | 0 | 99 mm | Perfect | Belgium in August |
| September | 20° / 12° | 4 | 26 | 0 | 60 mm | Good | Belgium in September |
| October | 15° / 9° | 5 | 26 | 0 | 71 mm | Good | Belgium in October |
| November | 10° / 5° | 7 | 21 | 1 | 84 mm | Bad | Belgium in November |
| December | 6° / 3° | 9 | 17 | 4 | 103 mm | Awful | Belgium in December |