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Monthly climate in Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, France

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Chamonix-Mont-Blanc features a subarctic climate (Dfc).Temperatures typically range between -8 °C (19 °F) and 14 °C (57 °F) through the year, but rarely can drop to -25 °C (-13 °F) or can rise to as high as 28 °C (83 °F).The average annual precipitation amounts to about 1930 mm (76.0 inches) and receives 186 rainy days on the 1 mm (0.04 inches) threshold annually.Chamonix-Mont-Blanc enjoys an average of 3692 hours of sunshine throughout the year, and daylight varies from 8 hours 42 minutes to 15 hours 39 minutes per day.

Monthly average temperatures in Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, France §

The warmest months in Chamonix-Mont-Blanc are June, July and August, with daily mean temperatures ranging from 12 to 14 °C (54 - 57 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -8 to -4 °C (19 - 26 °F) throughout the day. On average each year, Chamonix-Mont-Blanc experiences 1 days above 25 °C (77.0 °F) and 178 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, France.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 6°C
(44°F)		 11°C
(52°F)		 14°C
(58°F)		 17°C
(63°F)		 23°C
(74°F)		 28°C
(83°F)		 27°C
(81°F)		 25°C
(77°F)		 21°C
(71°F)		 18°C
(65°F)		 15°C
(60°F)		 8°C
(46°F)
Mean maximum 3°C
(37°F)		 8°C
(48°F)		 11°C
(52°F)		 15°C
(59°F)		 19°C
(66°F)		 21°C
(71°F)		 24°C
(76°F)		 25°C
(77°F)		 20°C
(69°F)		 16°C
(61°F)		 11°C
(53°F)		 5°C
(42°F)
Average high -3°C
(28°F)		 1°C
(35°F)		 4°C
(39°F)		 8°C
(47°F)		 12°C
(53°F)		 17°C
(63°F)		 19°C
(66°F)		 18°C
(65°F)		 15°C
(59°F)		 10°C
(51°F)		 4°C
(39°F)		 -2°C
(29°F)
Daily mean -8°C
(19°F)		 -4°C
(26°F)		 -1°C
(31°F)		 3°C
(38°F)		 7°C
(45°F)		 12°C
(54°F)		 14°C
(57°F)		 13°C
(56°F)		 10°C
(49°F)		 5°C
(42°F)		 -1°C
(30°F)		 -6°C
(22°F)
Average low -11°C
(12°F)		 -8°C
(18°F)		 -6°C
(22°F)		 -3°C
(28°F)		 2°C
(35°F)		 6°C
(44°F)		 8°C
(47°F)		 8°C
(47°F)		 5°C
(41°F)		 1°C
(34°F)		 -5°C
(23°F)		 -9°C
(15°F)
Mean minimum -20°C
(-4°F)		 -15°C
(5°F)		 -15°C
(4°F)		 -12°C
(11°F)		 -5°C
(23°F)		 1°C
(34°F)		 4°C
(39°F)		 3°C
(38°F)		 -1°C
(30°F)		 -5°C
(23°F)		 -14°C
(7°F)		 -19°C
(-2°F)
Minimum -25°C
(-13°F)		 -21°C
(-5°F)		 -25°C
(-12°F)		 -16°C
(3°F)		 -12°C
(11°F)		 -3°C
(28°F)		 2°C
(36°F)		 2°C
(36°F)		 -8°C
(19°F)		 -8°C
(18°F)		 -18°C
(-1°F)		 -23°C
(-8°F)

Compare climate in Chamonix-Mont-Blanc with other places

Compare temperature, precipitation, sunshine, UV index in Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, France with other places around the world.

Monthly average precipitation in Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, France §

Chamonix-Mont-Blanc usually has the most precipitation in March, May and December, with an average of 18 rainy days and 231 mm (9.1 inches) of precipitation per month.The driest months in Chamonix-Mont-Blanc are April, September and November. On average, 104 mm (4.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, France.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 171 (6.7) 141 (5.5) 175 (6.9) 84 (3.3) 224 (8.8) 167 (6.6) 162 (6.4) 149 (5.9) 109 (4.3) 133 (5.3) 120 (4.7) 295 (11.6)
Average precipitation days (≥ 1 mm) 10 11 15 13 21 20 18 17 16 13 13 19

Monthly sunshine hours in Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, France §

The sunniest months in Chamonix-Mont-Blanc are June, July and August, when the sun shines an average of 13 hours 10 minutes a day.Least sunny months in Chamonix-Mont-Blanc: January, November and December receive an average of 6 hours 33 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, France.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 173 237 305 351 361 396 422 392 330 291 227 201
Mean daily daylight hours 9h 5m 10h 21m 11h 56m 13h 33m 14h 57m 15h 39m 15h 17m 14h 3m 12h 29m 10h 52m 9h 26m 8h 42m

Solar UV radiation in Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, France §

Chamonix-Mont-Blanc experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Chamonix-Mont-Blanc UV Index data.

Average daily maximum UV levels by month for Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes, France.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 4 7 8 9 10 10 9 7 5 3 2