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Mammoth Mountain Long-Range Snow Forecast - 29th September 2026

Mammoth Mountain Long-Range Snow Forecast Updated today

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GFS

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Updated 29 September 2026 06:53 CDT

Long-Range Snow Forecast for Mammoth Mountain

Long-range (14 to 45 days) from 29 September.

For Forecast detail, see below.

Mammoth Mountain Snow Forecast Highlights

When will there be fresh snow in Mammoth Mountain?

Mammoth Mountain Snow Forecast Highlights - GFS
Snowfall prediction at mid-mountain (2,885m)
Next Snow?
There is no snow currently in the forecast for Mammoth Mountain.

Long-range Snow Outlook for Mammoth Mountain

 
Snowfall

 
Snow Line

Max 26℃
Min 3℃

Snow unlikely

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Mammoth Mountain 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 Mammoth Mountain from OpenMeteo(GFS)
BaseSnow and WeatherTemp
Town
Tue
29
Clear

Clear sky.

Max 17℃
Min 3℃
Wed
30
Clear

Clear sky.

Max 23℃
Min 7℃
Thu
01
Clear

Clear sky.

Max 25℃
Min 9℃
Fri
02
Cloud

Cloudy.

Max 24℃
Min 10℃
Sat
03
Cloud

Cloudy.

Max 26℃
Min 10℃
Sun
04
Clear

Clear sky.

Max 22℃
Min 10℃
Mon
05
Clear

Clear sky.

Max 24℃
Min 9℃

No significant snowfall is forecast for this period.

This Snow Forecast for Mammoth Mountain, United States 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 Mammoth Mountain, 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.

Mammoth Mountain Snow Forecast updated at 06:53 CDT, next update expected 09:00 CDT.

Ensemble forecast for Mammoth Mountain, USA at 2,400m

Daily Mean Temperature (yellow line is control)
Daily Total Precipitation (blue line is control)

Snow Reliability

Mammoth Mountain is known for its excellent snow reliability, with an average snowfall of over 400 inches annually. For the latest snow conditions and depth information, be sure to check J2Ski.

Off-Piste Safety in Mammoth Mountain

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