Click on a day for an hourly weather forecast
The weather in Fiss in September is very cold with temperatures between 2°C and 12°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Fiss. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Fiss is going to experience quite a number of days of snow during September. It’s the perfect time to build snowmen, drink hot cocoa, and have a snowball fight. Just remember to wear a warm scarf and a pair of mittens!
Our weather forecast can give you a great sense of what weather to expect in Fiss in September 2025.
If you’re planning to visit Fiss in the near future, we highly recommend that you review the 14 day weather forecast for Fiss before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -4° / -13° | 6 | 6 | 21 | 82 mm | Awful | Fiss in January |
| February | -3° / -13° | 6 | 5 | 20 | 68 mm | Awful | Fiss in February |
| March | -1° / -10° | 7 | 4 | 22 | 78 mm | Awful | Fiss in March |
| April | 3° / -5° | 8 | 4 | 21 | 87 mm | Awful | Fiss in April |
| May | 8° / -1° | 14 | 2 | 21 | 153 mm | Awful | Fiss in May |
| June | 13° / 4° | 17 | 6 | 9 | 194 mm | Awful | Fiss in June |
| July | 16° / 5° | 17 | 11 | 4 | 174 mm | Bad | Fiss in July |
| August | 16° / 6° | 15 | 13 | 4 | 201 mm | Bad | Fiss in August |
| September | 12° / 2° | 11 | 11 | 8 | 125 mm | Awful | Fiss in September |
| October | 7° / -2° | 7 | 9 | 15 | 104 mm | Awful | Fiss in October |
| November | 1° / -6° | 5 | 8 | 18 | 86 mm | Awful | Fiss in November |
| December | -3° / -12° | 5 | 7 | 20 | 86 mm | Awful | Fiss in December |