Grand Massif 7-Day Snow Forecast

Grand Massif Long-Range Snow Forecast Updated today

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Updated 31 August 2026 00:44 PDT

Long-Range Snow Forecast for Grand Massif

Long-range (14 to 45 days) from 31 August.

For Forecast detail, see below.

Grand Massif Snow Forecast Highlights

When will there be fresh snow in Grand Massif?

Grand Massif Snow Forecast Highlights - ECMWF IFS
Snowfall prediction at mid-mountain (5,249ft)
Next Snow?
There is no snow currently in the forecast for Grand Massif.
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Long-range Snow Outlook for Grand Massif

Snowfall

Snow Line

Max 91°F
Min 53°F

Snow unlikely

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Grand Massif 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 Grand Massif from OpenMeteo(ECMWF IFS)
	Snow and Weather	Temp Town
Mon 31	Light drizzle.	Max 73°F Min 59°F
Tue 01	Clear sky.	Max 74°F Min 53°F
Wed 02	Fair at altitude, light rain showers below.	Max 75°F Min 56°F
Thu 03	Clear sky.	Max 77°F Min 56°F
Fri 04	Clear sky.	Max 84°F Min 61°F
Sat 05	Clear sky.	Max 87°F Min 63°F
Sun 06	Clear sky.	Max 91°F Min 65°F

This Snow Forecast for Grand Massif, 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 Grand Massif, 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.

Grand Massif Snow Forecast updated at 00:44 PDT, next update expected 06:00 PDT.

Ensemble forecast for Grand Massif, France at 2,297ft

Daily Mean Temperature (yellow line is control)

Daily Total Precipitation (blue line is control)

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.

Snow Forecast near Grand Massif

Snow Forecasts for Ski Resorts near Grand Massif
Ski Area	48 Hr	7 Day	Mo	Tu	We	Th	Fr	Sa	Su
Chamonix	1in	1in

Snow Reliability

Grand Massif typically enjoys a reliable snow depth, with consistent snowfall throughout the season. For the latest snow conditions and updates, be sure to check J2Ski for accurate and timely information.

Off-Piste Safety in Grand Massif

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