Click on a day for an hourly weather forecast
The temperatures in Halden in September are usually low and can range between 12°C and 16°C.
You can expect about 3 to 8 days of rain in Halden 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 Halden in September 2026.
If you’re planning to visit Halden in the near future, we highly recommend that you review the 14 day weather forecast for Halden before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -2° | 6 | 14 | 10 | 78 mm | Awful | Halden in January |
| February | 1° / -2° | 7 | 10 | 12 | 72 mm | Awful | Halden in February |
| March | 4° / 1° | 5 | 19 | 6 | 63 mm | Awful | Halden in March |
| April | 9° / 4° | 4 | 24 | 2 | 53 mm | Bad | Halden in April |
| May | 13° / 8° | 7 | 24 | 0 | 89 mm | Bad | Halden in May |
| June | 17° / 12° | 5 | 25 | 0 | 84 mm | Good | Halden in June |
| July | 19° / 14° | 7 | 24 | 0 | 127 mm | Ok | Halden in July |
| August | 19° / 14° | 9 | 22 | 0 | 153 mm | Ok | Halden in August |
| September | 16° / 12° | 6 | 24 | 0 | 114 mm | Good | Halden in September |
| October | 10° / 7° | 9 | 22 | 0 | 128 mm | Bad | Halden in October |
| November | 6° / 4° | 9 | 19 | 3 | 109 mm | Awful | Halden in November |
| December | 3° / 0° | 10 | 12 | 9 | 99 mm | Awful | Halden in December |