Mammoth Mountain Snow Report and Forecast
Updated 21 April 2026 04:49 PDT
Snow Forecast for Mammoth Mountain
Snow and Weather from 21 April.
For Forecast detail, see 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 Snow Forecast Highlights
When will there be fresh snow in Mammoth Mountain?
| Next Snow Expected | 21 April |
|---|---|
| Next Snow Amount | 9in |
| Next 48 Hours | 11in |
| Next 7 Days | 13in |
Forecast for today in Mammoth Mountain
Max 38°F
Min 22°F
Freeze-thaw (spring snow) conditions, with valley temperatures cooling to 22°F and rising to 38°F
Temperature at BaseTemp at Base
Snowfall
Snow Line
Tue
21
6in to 9in New Snow
Clear sky early, then heavy snow later.
Snow falling to resort level (7,874ft).
Forecast times for Mammoth Mountain are in Los Angeles (US/Pacific) time zone.
Powder Alert!
Powder Alarm issued 21 April 2026 07:42 PDT
Powder Possible :- 11in of Fresh Snow is forecast for Mammoth Mountain over the next 2 days.
Partner Offers
Mammoth Mountain 7-Day Snow Forecast Overview
Get this snow forecast by e-mail
| Tue 21 | Wed 22 | Thu 23 | Fri 24 | Sat 25 | Sun 26 | Mon 27 | |
|---|---|---|---|---|---|---|---|
| Wind | SW F5 | SW F4 | SW F2 | SW F2 | SW F2 | ||
| 11,056ft | 26°F
 +9in
| 19°F
+3in
| 30°F
| 31°F
 | 26°F
 +1in
| 28°F
| 30°F
|
| SW F5 | SW F4 | SW F2 | SW F2 | SW F2 | |||
| 9,465ft | 31°F
+9in
| 24°F
+3in
| 36°F
| 36°F
| 32°F
+1in
| 34°F
| 35°F
|
| SW F4 | SW F4 | SW F2 | SW F2 | SW F2 | |||
| 7,874ft | 38°F
 +6in
| 33°F
+2in
| 42°F
| 42°F
| 38°F
| 40°F
| 41°F
|
| Snow Line | 7,874ft | 7,874ft | varying 9,675ft | varying 7,904ft | |||
| Max Town | 38°F | 33°F | 42°F | 42°F | 38°F | 40°F | 41°F |
| Min Town | 22°F | 18°F | 11°F | 25°F | 26°F | 26°F | 29°F |
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 Mammoth Mountain
| Ski Area | 48 Hr | 7 Day | Tu | We | Th | Fr | Sa | Su | Mo |
|---|---|---|---|---|---|---|---|---|---|
| June Mountain | 10in | 13in |
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.
Understanding and predicting Snow Conditions in Mammoth Mountain
Here are our tips for making the most of a trip to Mammoth Mountain, with the help of the J2Ski Snow forecasts and reports. You can find some great skiing in Mammoth Mountain, 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 Mammoth Mountain is not always controlled (slopes made safe from avalanche risk) or patrolled. Always check local advice, 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 Mammoth Mountain 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 Mammoth Mountain 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.