Chamonix Mont-Blanc

Chamonix Mont-Blanc, located at an altitude of 1035 m, with peaks reaching 3290 m, in the Northern French Alps, benefits from specific alpine weather conditions. This page brings together the 9-day weather forecast for Chamonix Mont-Blanc: four days in detail from Météo-France (minimum and maximum temperatures, expected snowfall, 0°C isotherm), then an outlook through day 9, along with the ski area snow depth. The Northern French Alps avalanche bulletin is also available below. Forecasts are calibrated to the resort's actual altitude; the first four days come from Météo-France models (AROME/ARPEGE), the outlook from a longer-range, less precise model.

9-day snowfall forecast

Cumulative forecast: 0 cm at the resort base (1,035 m) and 43 cm at the summit (3,290 m) over the next 4 days (Météo-France forecast). Tomorrow, Monday and Tuesday, rain on the lower slopes up to 1,700 m to 2,200 m depending on the day, with snow above. For the following days, the outlook is given as a range and is not included in this total.

Snow line over the coming days in Chamonix Mont-Blanc

• Tomorrow, 2am to 11am: snow line around 1,800 m, rain at the base, snow higher up.
• Monday, midnight to 10pm: snow line around 1,700 m (1,650 m to 2,200 m during the spell), rain at the base, snow higher up.
• Tuesday, 9am to 11pm: snow line around 2,200 m (2,100 m to 2,450 m during the spell), rain at the base, snow higher up.

Snow line: the altitude above which precipitation falls as snow. It is computed hour by hour, during precipitation, from Météo-France temperature and humidity at altitude: it is the altitude where the wet-bulb temperature rises above 1.3°C (the same definition as the German weather service's snowfall line). Météo-France days only, not the longer-range outlook.

Snow depth & slope openings

Avalanche bulletin — Mont-Blanc massif

Valid until: 14 November 2026 18:00

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