The average minimum temperature (usually the minimum temperature is noted during the night) in Chamonix-Mont-Blanc in September is 6.0°C (42.8°F). The amount of rain in September is high with an average of 105mm (4.1in). You will see the sun sometimes in this month, it has 190 hours of sun.

So what to wear in September? Visitors traveling to Chamonix-Mont-Blanc should plan on bringing a totally waterproof rain jacket since it will be raining some days. Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly.

Do these climate conditions match with when you want to go to Chamonix-Mont-Blanc? Find out where to stay here.

For other monthly weather averages and what to do in September look at the numbers below.

Weather and Climate offers all the information you need to know about the climate in Chamonix-Mont-Blanc.

We collected past weather data from many thousand weather stations around the world. So find on this website the historical weather averages in other cities in France and climate and forecast data for all other countries in the world.