Click on a day for an hourly weather forecast
The temperatures in Knokke Heist in September are usually low and can range between 13°C and 19°C.
You can expect about 3 to 8 days of rain in Knokke Heist 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 Knokke Heist in September 2026.
If you’re planning to visit Knokke Heist in the near future, we highly recommend that you review the 14 day weather forecast for Knokke Heist before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 3° | 9 | 18 | 4 | 103 mm | Awful | Knokke Heist in January |
| February | 7° / 3° | 8 | 16 | 4 | 79 mm | Awful | Knokke Heist in February |
| March | 10° / 4° | 7 | 23 | 1 | 72 mm | Bad | Knokke Heist in March |
| April | 13° / 7° | 3 | 26 | 1 | 47 mm | Ok | Knokke Heist in April |
| May | 16° / 9° | 6 | 25 | 0 | 77 mm | Good | Knokke Heist in May |
| June | 19° / 12° | 5 | 26 | 0 | 78 mm | Good | Knokke Heist in June |
| July | 21° / 15° | 5 | 26 | 0 | 97 mm | Good | Knokke Heist in July |
| August | 21° / 15° | 7 | 24 | 0 | 118 mm | Ok | Knokke Heist in August |
| September | 19° / 13° | 4 | 26 | 0 | 79 mm | Good | Knokke Heist in September |
| October | 15° / 10° | 7 | 24 | 0 | 112 mm | Ok | Knokke Heist in October |
| November | 11° / 7° | 8 | 21 | 0 | 110 mm | Bad | Knokke Heist in November |
| December | 8° / 5° | 10 | 19 | 3 | 113 mm | Awful | Knokke Heist in December |