Chamonix Sud 7-Day Snow Forecast

Chamonix Sud Long-Range Snow Forecast Updated today

ECMWF IFS

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Updated 20 March 2026 11:43 PDT

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 (8,005ft)
Next Snow Expected	22 March
Next Snow Amount	2in
Next 48 Hours	2in
Next 7 Days	14in
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Long-range Snow Outlook for Chamonix Sud

Snowfall

Snow Line

Max 48°F
Min 19°F

12in New Snow

Snow Line from 5,886ft to resort level (3,412ft).

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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	Clear sky.	Max 48°F Min 27°F
Sat 21	Clear sky at altitude, cloudy below.	Max 44°F Min 25°F
Sun 22	2in New Snow Snow showers at altitude, patchy rain below. Snow Line from 5,279ft to resort level (3,412ft).	Max 44°F Min 27°F
Mon 23	Clear sky.	Max 45°F Min 19°F
Tue 24	Cloudy.	Max 46°F Min 19°F
Wed 25	3in New Snow Patchy heavy snow. Snow Line from 5,886ft to resort level (3,412ft).	Max 45°F Min 27°F
Thu 26	4in to 7in New Snow Heavy snow at altitude, heavy rain showers below. Snow falling to resort level (3,412ft).	Max 29°F Min 25°F

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 trail 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 11:43 PDT, next update expected 17:00 PDT.

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	2in	17in
Avoriaz	3in	16in
Les Gets	3in	16in
Morzine	3in	16in
Chamonix	2in	15in
Flaine	2in	15in
Les Houches	2in	14in
La Clusaz	-	10in

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.