Chamonix Sud 7-Day Snow Forecast

Chamonix Sud Long-Range Snow Forecast Updated today

ECMWF IFS

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Updated 20 March 2026 07:40 CDT

Long-Range Snow Forecast for Chamonix Sud

Long-range (14 to 45 days) from 20 March.

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	22 March
Next Snow Amount	5cm
Next 48 Hours	5cm
Next 7 Days	24cm
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Long-range Snow Outlook for Chamonix Sud

Snowfall

Snow Line

Max 9℃
Min -6℃

22cm New Snow

Snow Line from 1,825m to resort level (1,040m).

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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 20	Fair at altitude, clear sky below.	Max 9℃ Min -3℃
Sat 21	Clear sky.	Max 8℃ Min -3℃
Sun 22	4cm to 8cm New Snow Snow showers at altitude, rain showers below. Snow Line from 1,625m to resort level (1,040m).	Max 5℃ Min -2℃
Mon 23	Clear sky.	Max 7℃ Min -6℃
Tue 24	Cloudy.	Max 8℃ Min -5℃
Wed 25	5cm to 9cm New Snow Patchy heavy snow at altitude, heavy rain showers below. Snow Line from 1,825m to resort level (1,040m).	Max 7℃ Min -3℃
Thu 26	4cm to 6cm New Snow Light snow. Snow falling to resort level (1,040m).	Max 0℃ Min -4℃

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 07:40 CDT, next update expected imminently.

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.

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Snow Forecast near Chamonix Sud

Snow Forecasts for Ski Resorts near Chamonix Sud
Ski Area	48 Hr	7 Day
La Flégère	4cm	29cm
Chamonix	8cm	28cm
Flaine	6cm	27cm
Avoriaz	5cm	26cm
Les Gets	4cm	26cm
Morzine	4cm	26cm
Les Houches	6cm	25cm
La Clusaz	3cm	20cm

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.