Chamonix Sud 7-Day Snow Forecast

Chamonix Sud Long-Range Snow Forecast Updated today

ECMWF IFS

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Updated 02 May 2026 14:43 CDT

Long-Range Snow Forecast for Chamonix Sud

Long-range (14 to 45 days) from 2 May.

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	5 May
Next Snow Amount	2cm
Next 48 Hours	1cm
Next 7 Days	7cm
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Long-range Snow Outlook for Chamonix Sud

Snowfall

Snow Line

Max 20℃
Min 3℃

12cm New Snow

Snow Line from 3,178m to 1,717m, 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
Sat 02	Cloudy.	Max 20℃ Min 6℃
Sun 03	Cloudy.	Max 19℃ Min 7℃
Mon 04	up to 2cm New Snow Cloudy. Snow Line from 2,855m to 1,886m, with rain below.	Max 17℃ Min 5℃
Tue 05	up to 6cm New Snow Snow at altitude, rain below. Snow Line from 3,086m to 1,855m, with rain below.	Max 15℃ Min 7℃
Wed 06	up to 3cm New Snow Light snow showers at altitude, light rain showers below. Snow Line from 2,378m to 1,794m, with rain below.	Max 10℃ Min 3℃
Thu 07	up to 1cm New Snow Light snow showers at altitude, light rain showers below. Snow Line from 1,794m to 1,717m, with rain below.	Max 14℃ Min 6℃
Fri 08	Fair.	Max 18℃ 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 14:43 CDT, next update expected 20:00 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.

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Snow Forecast near Chamonix Sud

Snow Forecasts for Ski Resorts near Chamonix Sud
Ski Area	48 Hr	7 Day
Les Arcs	2cm	29cm
La Clusaz	-	18cm
Morzine	-	14cm
Chamonix	1cm	13cm
La Flégère	-	7cm
Les Gets	-	7cm
Avoriaz	-	6cm
Flaine	-	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.