Common information
- Country
- France
- Population
- 10 614
Weather, climate, temperature by months in Chamonix-Mont-Blanc
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 33 | 29 | 21 | 18 | 16 | 21 | 24 | 29 | 34 | 36 | 38 | 37 | 38 |
| Average high, °C | 8 | 4 | -2 | -4 | -5 | -5 | -4 | -2 | 3 | 7 | 10 | 10 | 2 |
| Average temperature, °C | 4 | 1 | -5 | -7 | -8 | -8 | -7 | -5 | -0 | 4 | 7 | 7 | -1 |
| Average low, °C | 2 | -1 | -7 | -9 | -11 | -11 | -10 | -7 | -2 | 1 | 4 | 4 | -4 |
| Record low, °C | -1 | -6 | -13 | -18 | -21 | -20 | -15 | -8 | -2 | 0 | 3 | 3 | -21 |
| Rain, days | 5 | 6 | 6 | 7 | 5 | 5 | 5 | 4 | 5 | 5 | 6 | 7 | 66 |
| Snow, days | 3 | 3 | 5 | 5 | 6 | 5 | 2 | 1 | 0 | 0 | 0 | 1 | 31 |
| Fog, days | 3 | 3 | 5 | 5 | 6 | 5 | 2 | 1 | 0 | 0 | 0 | 1 | 31 |
| Average precipitation, mm. | 110 | 191 | 241 | 241 | 223 | 222 | 252 | 244 | 209 | 156 | 118 | 130 | 2337 |
| Relative humidity, % | 75 | 73 | 71 | 67 | 70 | 73 | 76 | 82 | 81 | 78 | 73 | 75 | 74 |
| Wind speed, km/h | 19 | 20 | 20 | 20 | 20 | 20 | 22 | 22 | 19 | 19 | 20 | 19 | 20 |
| Monthly sunshine, часов | 175 | 136 | 70 | 28 | 48 | 98 | 145 | 144 | 148 | 177 | 219 | 204 | 1592 |
| Day Length, часов | 13 | 11 | 10 | 9 | 10 | 11 | 13 | 14 | 16 | 16 | 16 | 15 | 13 |
| Dew point, °C | 9 | 5 | 1 | -2 | -3 | -3 | 0 | 2 | 6 | 9 | 11 | 11 | 46 |
| Growing degree-day, °C | 159 | 28 | 0 | 0 | 0 | 0 | 0 | 0 | 115 | 210 | 295 | 276 | 1082 |
| Atmosphere pressure, bar | 757 | 754 | 750 | 748 | 748 | 746 | 747 | 747 | 751 | 755 | 758 | 757 | 9018 |
| Solar radiation, global, Mj/m2 | 14 | 9 | 5 | 4 | 5 | 8 | 12 | 15 | 19 | 21 | 21 | 18 | 13 |