Chamonix-Mont-Blanc monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Chamonix-Mont-Blanc

Chamonix-Mont-Blanc average temperature chart (Celsius) Chamonix-Mont-Blanc average temperature chart (Fahrenheit)
Average monthly temperatures in Chamonix-Mont-Blanc (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -5.5 -5.3 -3.7 -0.5 4 7.7 10.8 10.3 7.8 3.4 -1.7 -4.1
°F 22.1 22.4 25.3 31.2 39.2 45.9 51.4 50.5 46 38.1 28.9 24.7

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Chamonix-Mont-Blanc monthly rainfall chart (mm) Chamonix-Mont-Blanc monthly rainfall chart (inches)
Average monthly rainfall in Chamonix-Mont-Blanc (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 127 113 120 122 138 152 130 152 129 121 142 130
inches 5 4.5 4.7 4.8 5.4 6 5.1 6 5.1 4.8 5.6 5.1
Rainy days 17 16 18 19 20 19 17 17 15 14 16 16

Average annual rainfall in Chamonix-Mont-Blanc: 1628.234mm (641 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Chamonix-Mont-Blanc

Chamonix-Mont-Blanc average daily sunshine chart
Average daily sunshine Chamonix-Mont-Blanc
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4 4.9 5.4 6.1 6.3 7.3 8.4 7.3 6.5 5.4 4.2 4

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Chamonix-Mont-Blanc average minimum / maximum temperatures (Celsius) Chamonix-Mont-Blanc average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Chamonix-Mont-Blanc (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -10.6 -10.8 -9.4 -6.9 -2.6 1.1 3.9 3.8 1.9 -1.3 -6.6 -9.5
Max °C -5.4 -5.2 -3.6 -0.3 4.2 7.9 11 10.5 7.9 3.5 -1.6 -4
Min °F 12.9 12.6 15.1 19.6 27.4 34 38.9 38.8 35.4 29.7 20.1 15
Max °F 17.6 17.6 20.3 25.5 33.4 40.1 45.3 44.8 40.8 34 24.6 19.9

Sea temperature

The graph below shows the average sea temperature.

Chamonix-Mont-Blanc average sea temperature chart (Celsius) Chamonix-Mont-Blanc average sea temperature chart (Fahrenheit)
Average sea temperature around Chamonix-Mont-Blanc in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12 11.3 11.6 13.1 16.2 19.6 22.3 23.1 21.3 18.7 15.8 13.5
°F 53.6 52.3 52.8 55.6 61.1 67.3 72.1 73.7 70.3 65.6 60.5 56.3

Wind speed

The graph below shows the average wind speed.

Chamonix-Mont-Blanc average winspeed by month (km/h) Chamonix-Mont-Blanc average winspeed by month (mph)
Average wind speed in Chamonix-Mont-Blanc (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 23 21 21 19 16 15 15 14 15 16 20 22
mph 14 13 13 12 10 9 9 9 9 10 13 14

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Chamonix-Mont-Blanc relative humidity averages
Average relative humidity in Chamonix-Mont-Blanc
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
70% 72% 73% 75% 77% 74% 71% 73% 74% 72% 71% 68%
Chamonix-Mont-Blanc

Other monthly averages

UV index Best time to go?

Chamonix-Mont-Blanc weather stats

Chamonix-Mont-Blanc weather statistics
Hottest month: July 10.8°C 51.4°F
Driest month: February 113mm 4.4ins
Sunniest month: July 8.4hrs
Coldest month: January -5.5°C 22.1°F
Wettest month: August 152mm 6ins
Warmest sea: August 23.1°C 73.6°F
Map showing location of Chamonix-Mont-Blanc (45.92375, 6.86933) Chamonix-Mont-Blanc map pin © Google

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