The weather in Sion in July is very cold with temperatures between 4°C and 18°C, warm clothes are a must.
There’s going to be many days of rain during the month of July in Sion.
Sion 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!
Our weather forecast can give you a great sense of what weather to expect in Sion in July 2025.
If you’re planning to visit Sion in the near future, we highly recommend that you review the 14 day weather forecast for Sion before you arrive.
Temperatures
18° / 4°
Rainy Days
16
Snowy Days
0
Dry Days
15
Rainfall
230
mm
Sun Hours
10.7
Hrs
