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The temperatures in Chamonix in August are quite cold with temperatures between 7°C and 17°C, warm clothes are a must.
You can expect rain for roughly half of the month of August in Chamonix. 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.
Please note that Chamonix can expect a few days of snow in August.
Our weather forecast can give you a great sense of what weather to expect in Chamonix in August 2025.
If you’re planning to visit Chamonix in the near future, we highly recommend that you review the 14 day weather forecast for Chamonix before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -11° | 5 | 7 | 19 | 125 mm | Awful | Chamonix in January |
| February | -2° / -11° | 5 | 5 | 19 | 96 mm | Awful | Chamonix in February |
| March | 1° / -7° | 6 | 6 | 21 | 105 mm | Awful | Chamonix in March |
| April | 5° / -3° | 8 | 3 | 20 | 100 mm | Awful | Chamonix in April |
| May | 9° / 1° | 14 | 3 | 18 | 185 mm | Awful | Chamonix in May |
| June | 14° / 5° | 17 | 7 | 7 | 174 mm | Bad | Chamonix in June |
| July | 17° / 7° | 14 | 15 | 2 | 166 mm | Bad | Chamonix in July |
| August | 17° / 7° | 12 | 17 | 2 | 141 mm | Bad | Chamonix in August |
| September | 13° / 4° | 10 | 15 | 5 | 90 mm | Awful | Chamonix in September |
| October | 9° / 0° | 6 | 14 | 11 | 78 mm | Bad | Chamonix in October |
| November | 3° / -4° | 5 | 9 | 17 | 101 mm | Awful | Chamonix in November |
| December | -1° / -9° | 5 | 8 | 18 | 117 mm | Awful | Chamonix in December |