Chamonix Sud 7-Day Snow Forecast

Chamonix Sud Long-Range Snow Forecast Updated today

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Updated 11 September 2026 07:46 CDT

Long-Range Snow Forecast for Chamonix Sud

Long-range (14 to 45 days) from 11 September.

For Forecast detail, see below.

Chamonix Sud Snow Forecast Highlights

When will there be fresh snow in Chamonix Sud?

Chamonix Sud Snow Forecast Highlights - ECMWF IFS
Snowfall prediction at mid-mountain (2,440m)
Next Snow Expected	24 September
Next Snow Amount	11cm
Next 48 Hours	-
Next 7 Days	-
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Long-range Snow Outlook for Chamonix Sud

Snowfall

Snow Line

Max 24℃
Min 6℃

6cm New Snow

Snow Line from 3,086m to 2,902m, with rain below.

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Chamonix Sud Long-Range (2 weeks+) Snow Forecast Outlook

Note :- Mountain weather is extremely dynamic; the forecast below will change. Any forecast snow may move forward or back in the forecast, and predicted snowfall depths will be revised in subsequent updates.

16 Day Weather and Snow Forecast for Chamonix Sud from OpenMeteo(ECMWF IFS)
	Snow and Weather	Temp Town
Fri 11	Cloudy.	Max 18℃ Min 10℃
Sat 12	Clear sky.	Max 20℃ Min 7℃
Sun 13	Cloudy.	Max 21℃ Min 8℃
Mon 14	Clear spells.	Max 23℃ Min 11℃
Tue 15	Clear sky.	Max 24℃ Min 10℃
Wed 16	up to 6cm New Snow Snow at altitude, rain below. Snow Line from 3,086m to 2,902m, with rain below.	Max 15℃ Min 11℃
Thu 17	Clear sky.	Max 18℃ Min 6℃

This Snow Forecast for Chamonix Sud, France gives the predicted Snowfall and Freezing Levels for the next week.

The forecast snowfall depths given are the likely average accumulations for the Lower and Upper slopes. The actual snow depth in Chamonix Sud, on any given piste or itinerary, may be dramatically different, particularly if the snowfall is accompanied by high winds and/or varying air temperatures.

Snow Forecasts beyond two days ahead are subject to significant change and variable reliability.

Chamonix Sud Snow Forecast updated at 07:46 CDT, next update expected 13:00 CDT.

Long-range ensemble forecasts for Chamonix Sud will be available shortly.

What are Forecast Ensembles ? Multiple forecasts from running the same weather model with slightly different inputs. The prominent line (the 'control') is the model output from standard inputs, the thinner lines are the variations. Plotted together, they show a range of possible outcomes; the closer they are, the higher the confidence.

How to read Long Range Ensemble Forecasts

These forecasts are from ECMWF EC46, a long-range, low-resolution (area) model. They may not accurately reflect local conditions and should be read as area forecasts, indicating whether the coming weeks are likely to be warmer, colder, wetter, or drier than average.

What to look for?

Temperatures trending downward at the same time as precipitation spikes upward... means snow!

Lines close together indicate a high confidence, while wider spreads signal uncertainty.

France Accommodation (Apartments, Chalets, Hotels) Map

Snow Forecast near Chamonix Sud

Snow Forecasts for Ski Resorts near Chamonix Sud
Ski Area	48 Hr	7 Day	Fr	Sa	Su	Mo	Tu	We	Th
Chamonix	-	6cm

Snow Reliability

Chamonix Sud generally sees a snow depth of around 180 cm in winter, with reliable snowfall throughout the season. For the latest snow conditions, including updates on snowmelt and depth, visit J2Ski.

Off-Piste Safety in Chamonix Sud

Before skiing or snowboarding off-piste in Chamonix Sud, you must assess the local snow conditions. Always check the local Avalanche Risk Level and ski with appropriate safety equipment.