Click on a day for an hourly weather forecast
The weather in Aosta in August is very cold with temperatures between 2°C and 17°C, warm clothes are a must.
There’s going to be many days of rain during the month of August in Aosta.
Aosta 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 Aosta in August 2025.
If you’re planning to visit Aosta in the near future, we highly recommend that you review the 14 day weather forecast for Aosta before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -4° / -16° | 2 | 8 | 21 | 116 mm | Awful | Aosta in January |
| February | -3° / -16° | 3 | 5 | 21 | 114 mm | Awful | Aosta in February |
| March | 0° / -13° | 6 | 4 | 23 | 127 mm | Awful | Aosta in March |
| April | 4° / -8° | 9 | 3 | 20 | 185 mm | Awful | Aosta in April |
| May | 8° / -4° | 18 | 4 | 12 | 272 mm | Awful | Aosta in May |
| June | 14° / 0° | 19 | 10 | 2 | 249 mm | Bad | Aosta in June |
| July | 17° / 2° | 16 | 14 | 1 | 219 mm | Ok | Aosta in July |
| August | 17° / 2° | 15 | 16 | 0 | 201 mm | Ok | Aosta in August |
| September | 13° / 0° | 12 | 16 | 3 | 129 mm | Awful | Aosta in September |
| October | 8° / -5° | 7 | 17 | 8 | 126 mm | Awful | Aosta in October |
| November | 2° / -10° | 4 | 9 | 17 | 183 mm | Awful | Aosta in November |
| December | -3° / -15° | 1 | 11 | 18 | 101 mm | Awful | Aosta in December |