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The weather in Poschiavo in September is very cold with temperatures between 2°C and 12°C, warm clothes are a must.
There’s going to be many days of rain during the month of September in Poschiavo.
Poschiavo should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Please note that Poschiavo can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Poschiavo in September 2026.
If you’re planning to visit Poschiavo in the near future, we highly recommend that you review the 14 day weather forecast for Poschiavo before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -6° / -16° | 7 | 7 | 19 | 124 mm | Awful | Poschiavo in January |
| February | -5° / -15° | 5 | 5 | 20 | 145 mm | Awful | Poschiavo in February |
| March | 0° / -11° | 10 | 4 | 21 | 156 mm | Awful | Poschiavo in March |
| April | 4° / -6° | 14 | 4 | 15 | 235 mm | Awful | Poschiavo in April |
| May | 9° / -1° | 21 | 5 | 7 | 303 mm | Awful | Poschiavo in May |
| June | 14° / 3° | 21 | 9 | 0 | 313 mm | Ok | Poschiavo in June |
| July | 17° / 5° | 21 | 10 | 0 | 316 mm | Ok | Poschiavo in July |
| August | 16° / 5° | 19 | 12 | 0 | 301 mm | Ok | Poschiavo in August |
| September | 12° / 2° | 15 | 14 | 2 | 220 mm | Awful | Poschiavo in September |
| October | 5° / -4° | 8 | 16 | 6 | 227 mm | Awful | Poschiavo in October |
| November | -1° / -9° | 9 | 10 | 13 | 251 mm | Awful | Poschiavo in November |
| December | -6° / -15° | 7 | 8 | 18 | 157 mm | Awful | Poschiavo in December |