Click on a day for an hourly weather forecast
The temperatures in Katwijk in September are usually low and can range between 12°C and 19°C.
You can expect about 3 to 8 days of rain in Katwijk 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 Katwijk in September 2026.
If you’re planning to visit Katwijk in the near future, we highly recommend that you review the 14 day weather forecast for Katwijk before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / 1° | 8 | 18 | 5 | 73 mm | Awful | Katwijk in January |
| February | 6° / 1° | 7 | 16 | 5 | 74 mm | Awful | Katwijk in February |
| March | 10° / 3° | 5 | 24 | 2 | 58 mm | Bad | Katwijk in March |
| April | 15° / 6° | 3 | 26 | 1 | 40 mm | Good | Katwijk in April |
| May | 18° / 9° | 6 | 26 | 0 | 70 mm | Good | Katwijk in May |
| June | 21° / 12° | 5 | 25 | 0 | 92 mm | Good | Katwijk in June |
| July | 23° / 14° | 6 | 25 | 0 | 107 mm | Perfect | Katwijk in July |
| August | 23° / 14° | 5 | 26 | 0 | 99 mm | Perfect | Katwijk in August |
| September | 19° / 12° | 4 | 26 | 0 | 61 mm | Good | Katwijk in September |
| October | 14° / 8° | 5 | 26 | 0 | 66 mm | Good | Katwijk in October |
| November | 10° / 5° | 6 | 24 | 1 | 62 mm | Ok | Katwijk in November |
| December | 6° / 3° | 9 | 18 | 4 | 74 mm | Awful | Katwijk in December |