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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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -6° / -16° | 7 | 7 | 19 | 124 mm | Awful | Grisons in January |
| February | -5° / -15° | 5 | 5 | 20 | 145 mm | Awful | Grisons in February |
| March | 0° / -11° | 10 | 4 | 21 | 156 mm | Awful | Grisons in March |
| April | 4° / -6° | 14 | 4 | 15 | 235 mm | Awful | Grisons in April |
| May | 9° / -1° | 21 | 5 | 7 | 303 mm | Awful | Grisons in May |
| June | 14° / 3° | 21 | 9 | 0 | 313 mm | Ok | Grisons in June |
| July | 17° / 5° | 21 | 10 | 0 | 316 mm | Ok | Grisons in July |
| August | 16° / 5° | 19 | 12 | 0 | 301 mm | Ok | Grisons in August |
| September | 12° / 2° | 15 | 14 | 2 | 220 mm | Awful | Grisons in September |
| October | 5° / -4° | 8 | 16 | 6 | 227 mm | Awful | Grisons in October |
| November | -1° / -9° | 9 | 10 | 13 | 251 mm | Awful | Grisons in November |
| December | -6° / -15° | 7 | 8 | 18 | 157 mm | Awful | Grisons in December |