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The weather in Pontresina in September is very cold with temperatures between 4°C and 12°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Pontresina. 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.
You can expect a few days of snow in Pontresina during September. It’s important to get out your snow boots and warm mittens to stay warm while you explore Pontresina.
Our weather forecast can give you a great sense of what weather to expect in Pontresina in September 2025.
If you’re planning to visit Pontresina in the near future, we highly recommend that you review the 14 day weather forecast for Pontresina before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -3° / -11° | 6 | 9 | 17 | 82 mm | Awful | Pontresina in January |
| February | -2° / -10° | 5 | 7 | 18 | 102 mm | Awful | Pontresina in February |
| March | 1° / -8° | 6 | 5 | 21 | 108 mm | Awful | Pontresina in March |
| April | 4° / -3° | 9 | 4 | 19 | 182 mm | Awful | Pontresina in April |
| May | 9° / 1° | 19 | 3 | 13 | 231 mm | Awful | Pontresina in May |
| June | 14° / 5° | 20 | 8 | 2 | 286 mm | Bad | Pontresina in June |
| July | 16° / 7° | 21 | 9 | 1 | 303 mm | Ok | Pontresina in July |
| August | 16° / 7° | 19 | 12 | 0 | 298 mm | Ok | Pontresina in August |
| September | 12° / 4° | 13 | 14 | 3 | 186 mm | Awful | Pontresina in September |
| October | 7° / -1° | 6 | 17 | 8 | 186 mm | Bad | Pontresina in October |
| November | 2° / -5° | 4 | 9 | 17 | 210 mm | Awful | Pontresina in November |
| December | -2° / -10° | 4 | 10 | 17 | 115 mm | Awful | Pontresina in December |