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Chamonix Sud Snow Forecast - 12th May 2026

Chamonix Sud Snow Report and Forecast

ECMWF IFS
GFS

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Updated 12 May 2026 14:45 CDT

Snow Forecast for Chamonix Sud

Snow and Weather from 12 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 Expected12 May
Next Snow Amount8cm
Next 48 Hours22cm
Next 7 Days28cm
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Forecast for today in Chamonix Sud

Max 10℃
Min 3℃

Valley temperatures from an overnight low of 3℃ to daytime highs around 10℃

Temperature at BaseTemp at Base

 
Snowfall

 
Snow Line

Tue
12

up to 8cm New Snow

MixedLight SnowMixedCloud

Clear spells first, light snow at altitude then clear spells, cloudy later.

Snow Line from 1,655m to 1,255m, with rain below.

Forecast times for Chamonix Sud are in Paris (Europe/Paris) time zone.

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Chamonix Sud 7-Day Snow Forecast Overview

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Summary Weather and Snow Forecast for Chamonix Sud from OpenMeteo(ECMWF IFS)
Tue
12
Wed
13
Thu
14
Fri
15
Sat
16
Sun
17
Mon
18
Wind
3,840m
-10℃
Lt Snow Shwrs
+8cm
-8℃
Cloud
-13℃
Snow
+13cm
-12℃
Snow
+6cm
-11℃
Lt Snow Shwrs
+1cm
-9℃
Cloud
-7℃
Mixed
+2cm
2,440m
-1℃
Snow
+8cm
0℃
Mixed
-4℃
Snow
+13cm
-3℃
Snow
+5cm
-3℃
Light Snow
+1cm
0℃
Cloud
1℃
Mixed
1,040m
10℃
Mixed
12℃
Cloud
6℃
Light Snow
+2cm
5℃
Snow
+3cm
8℃
Mixed
12℃
Mixed
13℃
Lt Drizzle
Snow Line

varying 1,655m
to 1,255m

varying 2,332m
to 1,625m

varying 1,686m
to 1,040m

varying 1,625m
to 1,040m

varying 1,963m
to 1,302m

varying 2,763m
to 2,255m

Max Town10℃12℃6℃5℃8℃12℃13℃
Min Town3℃4℃1℃-1℃1℃2℃1℃

This table shows the average forecast snowfall, the maximum temperature, and expected general weather at resort, lower and upper mountain levels. For daily forecast details, see below.

Snow Forecast near Chamonix Sud

Snow Forecasts for Ski Resorts near Chamonix Sud
Ski Area 48 Hr 7 DayTuWeThFrSaSuMo
Avoriaz24cm 34cm
Chamonix22cm 30cm
Flaine21cm 27cm
Morzine19cm 27cm
Les Gets19cm 26cm
La Flégère19cm 25cm
Les Houches20cm 24cm
La Clusaz15cm 23cm

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.

Understanding and predicting Snow Conditions in Chamonix Sud

Here are our tips for making the most of a trip to Chamonix Sud, with the help of the J2Ski Snow forecasts and reports. You can find some great skiing in Chamonix Sud, but like any mountain, snow conditions change throughout the season, from day to day, and even from hour to hour.

Whether you’re sticking to the marked pistes or venturing off-piste, here’s what you need to know:

Pistes (Groomers) or Off-Piste

These can be a world apart, regarding snow conditions, even ignoring the difference between the natural terrain features to be found off-piste and the generally controlled surfaces and slopes of a pisted (groomed) run.

  • Piste Conditions can range from fresh powder to firm, icy surfaces, particularly after warm spells or a busy day on the mountain with the passage of many skiers.
  • Off-Piste Conditions are far more variable. Wind and sun can quickly transform fresh snow into wind crust or slushy layers, whilst cold weather can preserve stashes of powder many days after a snowfall.

WARNING - skiing off-piste (out-of-bounds) at Chamonix Sud is uncontrolled and un-marked slopes are not made safe (from avalanche risk) or patrolled. Always check local advice, know the Avalanche Risk Level, ski with safety kit (and know how to use it), and never ski alone.

Analyzing Weather and Snowfall Forecasts

Whilst no forecast can tell you exactly how snow conditions in Chamonix Sud will develop, checking the forecast regularly should give you an idea of what to expect.

New snowfall can bring fresh powder and refresh the surfaces of pisted runs. Powder can be tracked out quickly at busy times, but in less crowded and shaded areas, fresh snow can linger for days.

Changes in weather conditions, such as milder temperatures, rain or wind, can degrade snow quality. Conversely, cold, stable weather can preserve conditions for extended periods.

Predicting Future Snow Quality

Regularly check our snow and weather forecasts for Chamonix Sud for changes that may affect snow quality. Forecast snowfall depth and recent snowfall are good indicators of what to expect.

Use historical data and recent snow reports to understand past snow conditions and anticipate future changes.