FranceAverage weather for Chamonix-Mont-Blanc in September
It's cool to moderate in September in Chamonix-Mont-Blanc with an average temperature of 16°C. Temperatures this month range from a low of 14°C to a high of 19°C. At night, you can expect temperatures between 5°C and 9°C.
Start of September
The month of September starts in Chamonix-Mont-Blanc with mild temps, averaging around 18°C during the day and nights around 9°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid September
By mid-September, daytime temps drop to around 17°C, with nights around 9°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Chamonix-Mont-Blanc is around 15°C, while nighttime temps are about 6°C. A shower might pop up, but overall, the weather will be dry and sunny.
In September, there is an average of 62 mm of precipitation, spread over 11 days. Of the total precipitation, about 2,3 cm falls as snow in September. The wind speed is around 4 Bft, mostly coming from the South.
Chamonix-Mont-Blanc in September |
New York | ||
|---|---|---|---|
 Average temperature |
16°C | 27°C | |
 Max. temperature |
19°C | 31°C | |
| Min. temperature |
14°C | -5°C | |
 Total precipitation |
62 mm | 57 mm | |
| Rainy days |
11 days | 9 days | |
 Total snowfall |
2,3 cm | 0 cm | |
| Snowy days |
1 day | 0 days | |
August
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Chamonix-Mont-Blanc?
Looking for sun and warm weather? September isn’t a good month to be in Chamonix-Mont-Blanc. The temperatures are too low for a warm stay this month.
Temperature records
With 30°C in 2019, Chamonix-Mont-Blanc reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was -2°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of -5°C to a highest value of 16°C.
Check out the climate of Chamonix-Mont-Blanc for all months and discover the best travel time
Curious about the weather in other parts of France? Check out the climate and weather for spots like Paris, Côte d'Azur, Bretagne, or explore other destinations in France.
Daily Temperature in September in Chamonix-Mont-Blanc
This chart shows the average daily high and low temperatures in September for Chamonix-Mont-Blanc, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Weather experiences in September in Chamonix-Mont-Blanc
Good
It was a pleasantly warm day, ideal for hiking. The evenings... more
Daily Precipitation in September in Chamonix-Mont-Blanc
The chart below shows the average daily precipitation in September for Chamonix-Mont-Blanc, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 11 days of precipitation in Chamonix-Mont-Blanc.
Daily Snowfall in September in Chamonix-Mont-Blanc
This chart shows the average daily snowfall in September in Chamonix-Mont-Blanc, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in September.
Daily UV index in September in Chamonix-Mont-Blanc
This chart shows the average daily UV index in September in Chamonix-Mont-Blanc, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Chamonix-Mont-Blanc over the years
This chart shows the average temperature in September in Chamonix-Mont-Blanc, measured in degrees Celsius, over the past few years.
Total precipitation in September in Chamonix-Mont-Blanc over the years
This chart shows the average precipitation in September in Chamonix-Mont-Blanc, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in September in Chamonix-Mont-Blanc per year
This chart shows the average snowfall in September in Chamonix-Mont-Blanc, measured in centimeters, over the past few years.
Daily weather in September for Chamonix-Mont-Blanc
Click on any day in September to get detailed info about the usual weather on that day in Chamonix-Mont-Blanc. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Chamonix-Mont-Blanc
The weather in September in Chamonix-Mont-Blanc is rated 4 out of 5 stars by 1 visitor. Have you been to Chamonix-Mont-Blanc? Share your weather experience to help other visitors.
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It was a pleasantly warm day, ideal for hiking. The evenings were cool, but not cold. Unfortunately some rain fell, but that could not dampen our mood. Definitely highly recommended!— This text is automatically translated to English
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Average weather in Chamonix-Mont-Blanc by month
Click on a month below to see detailed weather info for Chamonix-Mont-Blanc. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Chamonix-Mont-Blanc for all months at once
