Click on a day for an hourly weather forecast
The temperatures in Appenzell in September are quite cold with temperatures between 8°C and 18°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Appenzell 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.
Please note that Appenzell can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Appenzell in September 2026.
If you’re planning to visit Appenzell in the near future, we highly recommend that you review the 14 day weather forecast for Appenzell before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -5° | 6 | 7 | 20 | 186 mm | Awful | Appenzell in January |
| February | 3° / -5° | 6 | 5 | 19 | 127 mm | Awful | Appenzell in February |
| March | 7° / -2° | 6 | 9 | 16 | 139 mm | Bad | Appenzell in March |
| April | 12° / 2° | 8 | 12 | 10 | 109 mm | Awful | Appenzell in April |
| May | 15° / 6° | 13 | 12 | 7 | 184 mm | Bad | Appenzell in May |
| June | 20° / 10° | 12 | 18 | 0 | 196 mm | Ok | Appenzell in June |
| July | 22° / 11° | 12 | 19 | 0 | 197 mm | Ok | Appenzell in July |
| August | 22° / 11° | 10 | 21 | 0 | 203 mm | Ok | Appenzell in August |
| September | 18° / 8° | 5 | 24 | 1 | 101 mm | Good | Appenzell in September |
| October | 13° / 4° | 5 | 20 | 5 | 109 mm | Bad | Appenzell in October |
| November | 8° / 1° | 5 | 13 | 11 | 127 mm | Bad | Appenzell in November |
| December | 3° / -3° | 5 | 7 | 19 | 172 mm | Awful | Appenzell in December |