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