The weather in Grisons in May is very cold with temperatures between -1°C and 9°C, warm clothes are a must.
There’s going to be many days of rain during the month of May in Grisons.
Grisons 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!
You can expect a few days of snow in Grisons during May. It’s important to get out your snow boots and warm mittens to stay warm while you explore Grisons.
Our weather forecast can give you a great sense of what weather to expect in Grisons in May 2026.
If you’re planning to visit Grisons in the near future, we highly recommend that you review the 14 day weather forecast for Grisons before you arrive.
Temperatures
9° / -1°
Rainy Days
21
Snowy Days
7
Dry Days
5
Rainfall
303
mm
Sun Hours
8.7
Hrs
