Click on a day for an hourly weather forecast
The temperatures in Schwyz in September are quite cold with temperatures between 6°C and 15°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Schwyz. 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.
Our weather forecast can give you a great sense of what weather to expect in Schwyz in September 2026.
If you’re planning to visit Schwyz in the near future, we highly recommend that you review the 14 day weather forecast for Schwyz before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -1° / -8° | 9 | 9 | 13 | 192 mm | Awful | Schwyz in January |
| February | 0° / -8° | 9 | 8 | 12 | 134 mm | Awful | Schwyz in February |
| March | 3° / -5° | 10 | 13 | 8 | 160 mm | Awful | Schwyz in March |
| April | 8° / -1° | 12 | 15 | 3 | 164 mm | Awful | Schwyz in April |
| May | 12° / 3° | 18 | 13 | 0 | 294 mm | Bad | Schwyz in May |
| June | 17° / 7° | 18 | 12 | 0 | 330 mm | Ok | Schwyz in June |
| July | 19° / 9° | 17 | 14 | 0 | 328 mm | Ok | Schwyz in July |
| August | 19° / 9° | 15 | 16 | 0 | 322 mm | Ok | Schwyz in August |
| September | 15° / 6° | 9 | 21 | 0 | 177 mm | Ok | Schwyz in September |
| October | 10° / 2° | 7 | 23 | 0 | 183 mm | Bad | Schwyz in October |
| November | 5° / -1° | 9 | 17 | 4 | 179 mm | Awful | Schwyz in November |
| December | 1° / -6° | 10 | 12 | 10 | 190 mm | Awful | Schwyz in December |