Click on a day for an hourly weather forecast
The weather in Zermatt in September is very cold with temperatures between 0°C and 11°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Zermatt. 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 Zermatt during September. It’s important to get out your snow boots and warm mittens to stay warm while you explore Zermatt.
Our weather forecast can give you a great sense of what weather to expect in Zermatt in September 2025.
If you’re planning to visit Zermatt in the near future, we highly recommend that you review the 14 day weather forecast for Zermatt before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -4° / -15° | 4 | 6 | 21 | 111 mm | Awful | Zermatt in January |
| February | -3° / -14° | 3 | 5 | 21 | 112 mm | Awful | Zermatt in February |
| March | -1° / -11° | 7 | 2 | 24 | 143 mm | Awful | Zermatt in March |
| April | 2° / -7° | 11 | 2 | 22 | 234 mm | Awful | Zermatt in April |
| May | 6° / -3° | 19 | 3 | 14 | 319 mm | Awful | Zermatt in May |
| June | 12° / 1° | 22 | 6 | 2 | 306 mm | Awful | Zermatt in June |
| July | 15° / 3° | 21 | 9 | 1 | 328 mm | Ok | Zermatt in July |
| August | 15° / 2° | 20 | 10 | 1 | 292 mm | Ok | Zermatt in August |
| September | 11° / 0° | 13 | 14 | 3 | 170 mm | Awful | Zermatt in September |
| October | 6° / -5° | 9 | 13 | 9 | 175 mm | Awful | Zermatt in October |
| November | 1° / -9° | 5 | 7 | 19 | 227 mm | Awful | Zermatt in November |
| December | -3° / -14° | 4 | 9 | 18 | 101 mm | Awful | Zermatt in December |