Click on a day for an hourly weather forecast
The temperatures in Deinze 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 Deinze 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 Deinze in September 2026.
If you’re planning to visit Deinze in the near future, we highly recommend that you review the 14 day weather forecast for Deinze before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 1° | 9 | 17 | 5 | 104 mm | Awful | Deinze in January |
| February | 7° / 2° | 9 | 14 | 5 | 87 mm | Awful | Deinze in February |
| March | 11° / 4° | 8 | 22 | 2 | 78 mm | Awful | Deinze in March |
| April | 15° / 6° | 4 | 26 | 1 | 49 mm | Good | Deinze in April |
| May | 18° / 9° | 5 | 26 | 0 | 71 mm | Good | Deinze in May |
| June | 21° / 12° | 6 | 24 | 0 | 77 mm | Good | Deinze in June |
| July | 23° / 14° | 4 | 27 | 0 | 70 mm | Perfect | Deinze in July |
| August | 23° / 14° | 5 | 26 | 0 | 72 mm | Perfect | Deinze in August |
| September | 20° / 12° | 3 | 27 | 0 | 43 mm | Good | Deinze in September |
| October | 15° / 9° | 6 | 25 | 0 | 72 mm | Good | Deinze in October |
| November | 10° / 6° | 9 | 21 | 1 | 99 mm | Bad | Deinze in November |
| December | 7° / 3° | 10 | 18 | 3 | 117 mm | Awful | Deinze in December |