Click on a day for an hourly weather forecast
The weather in Zernez in September is very cold with temperatures between 1°C and 10°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Zernez. 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.
Please note that Zernez can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Zernez in September 2026.
If you’re planning to visit Zernez in the near future, we highly recommend that you review the 14 day weather forecast for Zernez before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -7° / -16° | 10 | 14 | 6 | 60 mm | Awful | Zernez in January |
| February | -5° / -14° | 11 | 12 | 6 | 56 mm | Awful | Zernez in February |
| March | -2° / -11° | 10 | 14 | 7 | 55 mm | Awful | Zernez in March |
| April | 1° / -7° | 11 | 10 | 9 | 81 mm | Awful | Zernez in April |
| May | 5° / -2° | 16 | 7 | 10 | 137 mm | Awful | Zernez in May |
| June | 11° / 2° | 16 | 13 | 2 | 133 mm | Awful | Zernez in June |
| July | 14° / 5° | 16 | 15 | 0 | 128 mm | Ok | Zernez in July |
| August | 14° / 5° | 13 | 17 | 1 | 145 mm | Ok | Zernez in August |
| September | 10° / 1° | 11 | 17 | 2 | 104 mm | Awful | Zernez in September |
| October | 5° / -3° | 9 | 17 | 5 | 116 mm | Awful | Zernez in October |
| November | -1° / -9° | 12 | 10 | 8 | 127 mm | Awful | Zernez in November |
| December | -6° / -14° | 12 | 12 | 7 | 82 mm | Awful | Zernez in December |