Click on a day for an hourly weather forecast
The temperatures in Amriswil in September are usually low and can range between 10°C and 19°C.
You can expect about 3 to 8 days of rain in Amriswil 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 Amriswil in September 2026.
If you’re planning to visit Amriswil in the near future, we highly recommend that you review the 14 day weather forecast for Amriswil before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -3° | 12 | 13 | 6 | 42 mm | Awful | Amriswil in January |
| February | 4° / -3° | 9 | 15 | 4 | 29 mm | Awful | Amriswil in February |
| March | 9° / 0° | 8 | 20 | 3 | 31 mm | Bad | Amriswil in March |
| April | 13° / 4° | 8 | 21 | 1 | 33 mm | Ok | Amriswil in April |
| May | 17° / 7° | 11 | 20 | 0 | 61 mm | Ok | Amriswil in May |
| June | 21° / 12° | 11 | 19 | 0 | 73 mm | Ok | Amriswil in June |
| July | 23° / 13° | 10 | 21 | 0 | 62 mm | Good | Amriswil in July |
| August | 23° / 13° | 9 | 22 | 0 | 65 mm | Good | Amriswil in August |
| September | 19° / 10° | 7 | 23 | 0 | 42 mm | Good | Amriswil in September |
| October | 14° / 6° | 7 | 24 | 0 | 42 mm | Good | Amriswil in October |
| November | 9° / 2° | 7 | 22 | 2 | 33 mm | Bad | Amriswil in November |
| December | 4° / -2° | 12 | 14 | 5 | 42 mm | Awful | Amriswil in December |