August Weather in Chamonix-Mont-Blanc

Last updated: March 2, 2024

The weather in Chamonix-Mont-Blanc, France, during August is characterized by an average temperature of 13°C (56°F). Highs can soar to 25°C (77°F), while lows may dip to 3°C (38°F). Typically, the humidity level in Chamonix-Mont-Blanc throughout August hovers around 63%.

3°C (38°F)

Minimum temperature

13°C (56°F)

Average temperature

25°C (77°F)

Maximum temperature

63%

Humidity

Precipitation and Sunshine hours

In August, Chamonix-Mont-Blanc averages 149 mm (5.9 inches) of rainfall, typically over the course of 17 rainy days. The month enjoys an average of 14 hours 3 minutes of daylight, with the sun shining for approximately 12 hours 39 minutes each day. Additionally, there is a 37% probability of sunny days during this period.

149 mm (5.9 inches)

Precipitation

17 rainy days

Rainy days

12 hours 39 minutes

Sunshine hours

37%

Chance of sun

UV Index

In August, the UV Index in Chamonix-Mont-Blanc reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 1 2 4 6 8 9 9 8 6 4 2 1
Exposure Low Moderate High VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 25 min 30 min 45 min

Compare Chamonix-Mont-Blanc's Climate with Cities Worldwide