Click on a day for an hourly weather forecast
The temperatures in Nivelles in September are usually low and can range between 11°C and 20°C.
You can expect about 3 to 8 days of rain in Nivelles 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 Nivelles in September 2026.
If you’re planning to visit Nivelles in the near future, we highly recommend that you review the 14 day weather forecast for Nivelles before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / 1° | 9 | 15 | 6 | 100 mm | Awful | Nivelles in January |
| February | 6° / 1° | 8 | 14 | 6 | 85 mm | Awful | Nivelles in February |
| March | 10° / 3° | 7 | 21 | 2 | 77 mm | Awful | Nivelles in March |
| April | 14° / 5° | 5 | 24 | 1 | 58 mm | Good | Nivelles in April |
| May | 17° / 8° | 6 | 25 | 0 | 80 mm | Good | Nivelles in May |
| June | 21° / 11° | 6 | 24 | 0 | 89 mm | Good | Nivelles in June |
| July | 22° / 13° | 5 | 26 | 0 | 76 mm | Good | Nivelles in July |
| August | 23° / 13° | 4 | 27 | 0 | 82 mm | Perfect | Nivelles in August |
| September | 20° / 11° | 4 | 26 | 0 | 50 mm | Good | Nivelles in September |
| October | 15° / 8° | 5 | 25 | 0 | 68 mm | Good | Nivelles in October |
| November | 10° / 5° | 8 | 20 | 1 | 96 mm | Bad | Nivelles in November |
| December | 6° / 2° | 11 | 16 | 5 | 114 mm | Awful | Nivelles in December |