The best times to visit Chamonix-Mont-Blanc for ideal weather are

June 4th to August 19th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Chamonix-Mont-Blanc Travel Info

Weather in Chamonix-Mont-Blanc

Temperature

Average temperatures in Chamonix-Mont-Blanc vary drastically. Considering humidity, temperatures feel cold for most of the year with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 30th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Chamonix-Mont-Blanc, the hottest months are July, June, and then August. See average monthly temperatures below. The warmest time of year is generally mid June where highs are regularly around 77.8°F (25.4°C) with temperatures rarely dropping below 50°F (10°C) at night.

Chamonix-Mont-Blanc Temperatures (Fahrenheit)

Key
High
Average
Low

Chamonix-Mont-Blanc Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Chamonix-Mont-Blanc Perceived Temperature (F)

Key
High
Average
Low

Chamonix-Mont-Blanc Perceived Temperature (C)

Key
High
Average
Low

 

Average Chamonix-Mont-Blanc Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 37.6 27.3 21.4
Feb 44.4 32.5 25.8
Mar 50.2 36.5 27
Apr 64.2 49.1 36.7
May 66.4 53.1 41.8
Jun 70.8 58.7 48.3
Jul 74 60 48.2
Aug 71.9 58.3 48
Sep 64.4 51.2 41.5
Oct 59 44.9 35.7
Nov 43.6 34.1 27.1
Dec 36.6 28.8 22.9

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 3.1 -2.6 -5.9
Feb 6.9 0.3 -3.4
Mar 10.1 2.5 -2.8
Apr 17.9 9.5 2.6
May 19.1 11.7 5.4
Jun 21.6 14.8 9.1
Jul 23.3 15.6 9
Aug 22.2 14.6 8.9
Sep 18 10.7 5.3
Oct 15 7.2 2.1
Nov 6.4 1.2 -2.7
Dec 2.6 -1.8 -5.1

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Chamonix-Mont-Blanc are October, April, and then January. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late January and early February. For example, on the week of January 29th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late February and early March with an average of 7 days of significant precipitation the week of February 26th.

When can you find snow in Chamonix-Mont-Blanc? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Chamonix-Mont-Blanc.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Chamonix-Mont-Blanc (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 18% 0 3.6
Feb 32% 0 5
Mar 19% 0 3.7
Apr 13% 0 2.4
May 33% 0 4.5
Jun 33% 0 5.5
Jul 30% 0 4.9
Aug 32% 0 6.1
Sep 23% 0 3.5
Oct 11% 0 2
Nov 20% 0 2.6
Dec 37% 0 5.3

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 18 0 9.1
Feb 32 0 12.7
Mar 19 0 9.4
Apr 13 0 6.1
May 33 0 11.4
Jun 33 0 14
Jul 30 0 12.4
Aug 32 0 15.5
Sep 23 0 8.9
Oct 11 0 5.1
Nov 20 0 6.6
Dec 37 0 13.5

 

Humidity and Wind

Chamonix-Mont-Blanc has some extremely humid months, with other comfortably humid months. The least humid month is April (52.9% relative humidity), and the most humid month is January (86.2%).

Wind in Chamonix-Mont-Blanc is usually extremely calm. The windiest month is April, followed by May and July. April’s average wind speed of around 2.1 knots (2.4 MPH or 3.9 KPH) is considered “light air.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late May where average top sustained speeds reach 6.7 knots, which is considered a light breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Chamonix-Mont-Blanc.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 0.8 Still 3.2 Barely noticeable
Feb 0.7 Still 3.8 Barely noticeable
Mar 1.6 Barely noticeable 5.9 Barely noticeable
Apr 2.1 Barely noticeable 6.4 Light breeze
May 2 Barely noticeable 5.7 Barely noticeable
Jun 1.8 Barely noticeable 5.7 Light breeze
Jul 1.9 Barely noticeable 5.7 Barely noticeable
Aug 1.6 Barely noticeable 5.6 Light breeze
Sep 1.6 Barely noticeable 5.4 Barely noticeable
Oct 1.2 Barely noticeable 4.6 Light breeze
Nov 1.6 Barely noticeable 4.5 Barely noticeable
Dec 1.7 Barely noticeable 4.4 Light breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 86.2%
Feb 81.8%
Mar 63.9%
Apr 52.9%
May 62.3%
Jun 67%
Jul 66.5%
Aug 73.7%
Sep 75.6%
Oct 78.6%
Nov 79.1%
Dec 84.1%

 

Is it Safe to Travel to Chamonix-Mont-Blanc?

Our best data indicates this area is somewhat safe. As of Dec 04, 2023 there are travel warnings for France; exercise a high degree of caution. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Nov 20, 2023.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Chamonix-Mont-Blanc, France is June, followed by August and April. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Chamonix-Mont-Blanc in October. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 53 in October means 53% of the tourists vs. June.

 

 

Overall Chamonix-Mont-Blanc Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 71.8°F (22.1°C) and 39.3°F (4.1°C) with warmer temperatures in the later months. Rain is somewhat common with 4 to 10 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see the most precipitation with 9 to 10 days of precipitation per month. June – August is the busiest season for tourism in Chamonix-Mont-Blanc, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 68.2°F (20.1°C) and 37.7°F (3.2°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 3 to 7 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Chamonix-Mont-Blanc to be enjoyable for warm weather travelers. The average high during this season is between 49.9°F (9.9°C) and 32.6°F (0.3°C). On average, it rains or snows a fair amount: 6 to 11 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travel› France › Chamonix-Mont-Blanc, France