Click on a day for an hourly weather forecast
The temperatures in Graubunden in August are quite cold with temperatures between 5°C and 18°C, warm clothes are a must.
You can expect rain for roughly half of the month of August in Graubunden. 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.
Our weather forecast can give you a great sense of what weather to expect in Graubunden in August 2025.
If you’re planning to visit Graubunden in the near future, we highly recommend that you review the 14 day weather forecast for Graubunden before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -13° | 6 | 5 | 21 | 119 mm | Awful | Graubunden in January |
| February | -1° / -13° | 5 | 5 | 20 | 84 mm | Awful | Graubunden in February |
| March | 2° / -9° | 8 | 5 | 20 | 97 mm | Awful | Graubunden in March |
| April | 7° / -5° | 10 | 5 | 15 | 114 mm | Awful | Graubunden in April |
| May | 11° / -1° | 17 | 6 | 9 | 166 mm | Awful | Graubunden in May |
| June | 16° / 3° | 16 | 13 | 1 | 199 mm | Ok | Graubunden in June |
| July | 18° / 5° | 16 | 15 | 0 | 176 mm | Ok | Graubunden in July |
| August | 18° / 5° | 14 | 17 | 0 | 194 mm | Ok | Graubunden in August |
| September | 15° / 2° | 10 | 18 | 2 | 115 mm | Bad | Graubunden in September |
| October | 9° / -2° | 6 | 17 | 8 | 111 mm | Bad | Graubunden in October |
| November | 4° / -6° | 6 | 10 | 15 | 113 mm | Awful | Graubunden in November |
| December | -1° / -11° | 5 | 7 | 20 | 115 mm | Awful | Graubunden in December |