Click on a day for an hourly weather forecast
The temperatures in Arnhem 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 Arnhem 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 Arnhem in September 2025.
If you’re planning to visit Arnhem in the near future, we highly recommend that you review the 14 day weather forecast for Arnhem before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / 1° | 9 | 17 | 5 | 76 mm | Awful | Arnhem in January |
| February | 6° / 1° | 8 | 16 | 5 | 74 mm | Awful | Arnhem in February |
| March | 11° / 4° | 6 | 24 | 1 | 68 mm | Ok | Arnhem in March |
| April | 15° / 6° | 4 | 25 | 1 | 53 mm | Good | Arnhem in April |
| May | 18° / 9° | 7 | 25 | 0 | 88 mm | Ok | Arnhem in May |
| June | 21° / 12° | 6 | 24 | 0 | 110 mm | Good | Arnhem in June |
| July | 23° / 14° | 7 | 24 | 0 | 127 mm | Good | Arnhem in July |
| August | 23° / 14° | 6 | 25 | 0 | 116 mm | Perfect | Arnhem in August |
| September | 20° / 12° | 5 | 25 | 0 | 76 mm | Good | Arnhem in September |
| October | 15° / 8° | 6 | 25 | 0 | 80 mm | Good | Arnhem in October |
| November | 10° / 5° | 7 | 22 | 1 | 83 mm | Bad | Arnhem in November |
| December | 6° / 3° | 10 | 17 | 4 | 103 mm | Awful | Arnhem in December |