Mammoth Mountain Long-Range Snow Forecast
Long-Range Snow Forecast for Mammoth Mountain
This is the Long-range Snow Forecast for Mammoth Mountain, United States for 16 days from 16 December.
Updated 16 December 2025 10:37 UTC.
Forecast times for Mammoth Mountain are in Coordinated Universal Time (UTC).
For Forecast detail, see below.
Mammoth Mountain Snow Forecast Highlights
When will there be fresh snow in Mammoth Mountain?
| Next Snow Expected | 24 December |
|---|---|
| Next Snow Amount | 8cm 3in |
| Next 48 Hours | - - |
| Next 7 Days | - - |
Long-range Snow Outlook for Mammoth Mountain
Snowfall
Snow Line
2cm 1in New Snow
Snow Line from 3,219m 10,561ft to 2,909m 9,544ft , with rain below.
There is some snow in the long-range forecast (8 to 16 days from today)!
J2Ski - Sign In for a long-range snow forecast, with more weather detail.
Mammoth Mountain has no new snow forecast in the next 48 hours.
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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.
| Base | Snow and Weather | Temp Town | |
|---|---|---|---|
| Tue 16 |  | Cloudy. | Max 13℃ 55°F Min 4℃ 40°F |
| Wed 17 | | Cloudy. | Max 11℃ 51°F Min 4℃ 39°F |
| Thu 18 | | Cloudy. | Max 12℃ 53°F Min 3℃ 37°F |
| Fri 19 | | Cloudy. | Max 10℃ 49°F Min 0℃ 33°F |
| Sat 20 |  | Clear sky. | Max 9℃ 48°F Min 1℃ 34°F |
| Sun 21 |  | up to 2cm up to 1in New Snow | Max 7℃ 44°F Min 2℃ 36°F |
| Mon 22 | | Cloudy. | Max 7℃ 44°F Min 0℃ 32°F |
There is some snow in the long-range forecast (8 to 16 days from today)!
J2Ski - Sign In for a long-range snow forecast, with more weather detail.
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 10:37 UTC, next update expected 13:00 UTC.
Ensemble forecast for Mammoth Mountain, USA at 2,400m
Daily Mean Temperature (yellow line is control)
Daily Total Precipitation (blue line is control)
Snow Forecast near Mammoth Mountain
| Ski Area | 48 Hr | 7 Day | Tu | We | Th | Fr | Sa | Su | Mo |
|---|---|---|---|---|---|---|---|---|---|
| June Mountain | - | 1cm - |
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.