Mammoth Mountain snow history

10 years of snow depth, snowfall and conditions at California, USA · 7,949ft to 11,053ft

Over the last 10 seasons Mammoth Mountain, USA has averaged 271in of snowfall, a peak snow depth of 78in, 16 powder days and 29 bluebird days a year, with skiable cover from around December 15 to May 23.

Snow history & climate

10-year averages for Mammoth Mountain

271 in
Snowfall / season
Nov-May total
78 in
Peak depth
typical season high
16
Powder days
6in+ in a day
29
Bluebird days
sun after snow
6
Rain days
0.04in+ of rain
149
Skiable days
12in+ cover

Month by month

Monthly averages

Average snowfall, snow depth, rain, sunshine and day counts by month at Mammoth Mountain, over the last 10 seasons.
MonthSnowfallAvg depthRainSun/dayTempPowderBluebirdRain days
Jan57 in37 in0in8.0 h31° / 14°3.34.60.1
Feb58 in51 in0.1in8.6 h30° / 13°3.44.70.8
Mar56 in58 in0in9.7 h33° / 16°3.66.10.1
Apr20 in50 in0.2in11.7 h40° / 21°1.23.60.8
May9 in30 in0.3in13.2 h47° / 26°0.22.02.8
Jun1 in10 in0.6in13.7 h61° / 36°0.00.04.4
Jul0 in1 in0.8in13.8 h70° / 45°0.00.05.6
Aug0 in0 in1in13.0 h68° / 44°0.00.04.0
Sep1 in0 in0.6in11.8 h61° / 37°0.00.33.8
Oct5 in1 in0.5in10.5 h52° / 29°0.20.41.8
Nov24 in4 in0.1in8.7 h39° / 20°1.52.80.7
Dec47 in18 in0.1in7.6 h33° / 16°2.54.70.5

Averages across the last 10 seasons. Powder, bluebird and rain columns are the average number of such days per month.

Season by season

SeasonSnowfallPeak depthPowder daysBluebird daysSkiable days
2025/26196 in59 in111984
2024/25207 in65 in1428185
2023/24214 in70 in1130143
2022/23best545 in142 in3135205
2021/22182 in63 in1318154
2020/21leanest150 in47 in52796
2019/20157 in52 in926163
2018/19374 in109 in2136184
2017/18223 in56 in1223108
2016/17462 in119 in3043168
How these numbers are calculated
  • Powder day — at least 6in of new snow in 24 hours.
  • Bluebird day — sunshine for at least 60% of daylight, following at least 4in of snow over the previous 3 days.
  • Rain day — at least 0.04in of rain (not snow) at this elevation.
  • Skiable day — at least 12in of settled snow on the ground.
  • Snow depth is modelled from Open-Meteo / ERA5 reanalysis at 9,501ft, not measured at the resort. Use it to compare seasons and resorts; use the resort's own report for today's conditions.

How Mammoth Mountain compares

Measured against 40 other resorts across 18 countries, each analysed exactly the same way. The line down the middle of each bar is the median.

Snowfall per season
among the very best we track
271 in
Ahead of 98% of resortsMedian 111 in

Total new snow between November and May.

Peak snow depth
among the very best we track
78 in
Ahead of 90% of resortsMedian 33 in

How deep the settled base gets at its yearly high.

Powder days
among the very best we track
16
Top of every resort we compareMedian 2

Days with 6in or more of new snow.

Bluebird days
among the very best we track
29
Ahead of 98% of resortsMedian 10

Sun and fresh snow on the same day.

Rain days
well below average
6
Drier than 95% of resortsMedian 32

Days with 0.04in or more of rain, not snow.

Skiable days
well above average
149
Ahead of 75% of resortsMedian 115

Days holding 12in or more of settled snow.

The season at Mammoth Mountain

Typical stretch holding 12in or more of settled snow, averaged over the record.

SepOctNovDecJanFebMarAprMayJunJulAug
Cover arrives
December 15
Season ends
May 23
Days of cover
161 days

When to go

These rarely land in the same month, so it is worth deciding which one matters most before you book.

Deepest base
March
58in average depth
Most new snow
February
58in and 3.4 powder days
Best bluebird odds
March
6.1 bluebird days, 9.7h sun a day
Wettest month
May
2.8 rain days

Is Mammoth Mountain a good place to ski or board?

heavy snowfalla deep, reliable basefrequent powder daysplenty of bluebird daysvery little raina long season

On 10 years of record, Mammoth Mountain stands out for heavy snowfall, a deep, reliable base, frequent powder days, plenty of bluebird days, very little rain and a long season.

Figures are modelled at 9,501ft from reanalysis data and describe an average year, not a forecast.

Mammoth Mountain snow record in detail

How much snow does Mammoth Mountain get?

Mammoth Mountain averages 271in of snowfall over a full season, measured from November to May across the last 10 winters. That is among the very best we track: more snow than 98% of 40 resorts we have analysed the same way, where the median season brings 111in.

Season to season the spread is wide. The best of the last 10 winters was 2022/23 with 545in, and the leanest was 2020/21 with 150in — a difference of 396in between a good year and a poor one. The most recent complete season, 2025/26, delivered 196in.

February is reliably the snowiest month, averaging 58in and 9 days with fresh snow.

How deep does the snow get at Mammoth Mountain?

Snowfall totals flatter resorts that lose their snow quickly, so the more useful number is how deep the settled base actually gets. At Mammoth Mountain the snowpack peaks at an average of 78in each season. That is among the very best we track, deeper than 90% of 40 resorts we have analysed the same way, against a median peak of 33in.

The base is deepest in March, averaging 58in through the month and topping out around 68in in a typical year.

How many powder days does Mammoth Mountain get?

Counting any day that delivers at least 6in of new snow, Mammoth Mountain averages 16 powder days a season. That is among the very best we track, more powder days than more than any other resort in the set, where the median is 2 a season.

February has the most, 3.4 on average.

How often does Mammoth Mountain get bluebird days?

Mammoth Mountain averages 29 bluebird days a season — days of sunshine for at least 60% of daylight after 4in or more of fresh snow. That is among the very best we track, more than 98% of 40 resorts we have analysed the same way, against a median of 10.

March is the best month for it, averaging 6.1 bluebird days and 9.7 hours of sunshine a day.

Does it rain at Mammoth Mountain?

At mid-mountain Mammoth Mountain sees an average of 6 days a season with 0.04in or more of rain rather than snow. That is well below average: 5% of the 40 other resorts we have analysed the same way see fewer wet days, against a median of 32.

May is the wettest month of the season, with 2.8 rain days and 0.3in on average.

When is the best time to ski or board Mammoth Mountain, and when does the season end?

Mammoth Mountain typically holds at least 12in of settled snow from around December 15 through to May 23, which works out at roughly 161 days of skiable cover in an average year. 149 of those fall inside the November to May season. On season length that is well above average compared with the 40 other resorts we have analysed the same way.

For the deepest base, go in March; for the most new snow, February; for fresh snow with sunshine, March.

Comparisons use 40 resorts across 18 countries, each measured over 5 recent seasons at mid-mountain height. Glaciated locations, where the model never melts the snow out, are excluded. Figures for Mammoth Mountain are taken at 9,501ft. Corpus last rebuilt September 2, 2026.

Mammoth Mountain month by month

What to expect in each month of the season, from the same ten-year record. Figures are averages for mid-mountain; a good or poor winter can move them a long way.

Mammoth Mountain in November

Too early

In November cover at mid-mountain is usually too thin to rely on, averaging 4in through the month. It brings 24in of new snow in an average year, with 6 snow days and 1.5 powder days. Average highs are 39°F and lows 20°F, with 8.7 hours of sunshine a day and 2.8 bluebird days.

Mammoth Mountain in December

Base building

December is when the base starts to build, averaging 18in and deepening towards its March peak. It brings 47in of new snow in an average year, with 8 snow days and 2.5 powder days. Average highs are 33°F and lows 16°F, with 7.6 hours of sunshine a day and 4.7 bluebird days. Rain is rare: under two days in a typical December.

Mammoth Mountain in January

Base building

Through January the base keeps building, to an average of 37in. It is the second-snowiest month of the season, with 57in of new snow on average, 8 snow days and 3.3 powder days. Average highs are 31°F and lows 14°F, with 8 hours of sunshine a day and 4.6 bluebird days.

Mammoth Mountain in February

Base building

By February the base is close to its March peak, averaging 51in. It is the snowiest month of the season, with 58in of new snow on average, 9 snow days and 3.4 powder days. Average highs are 30°F and lows 13°F, with 8.6 hours of sunshine a day and 4.7 bluebird days.

Mammoth Mountain in March

Best all round

March is when the base at Mammoth Mountain is at its deepest, averaging 59in through the month and peaking around 68in in a typical year. It is the third-snowiest month of the season, with 56in of new snow on average, 10 snow days and 3.6 powder days. Average highs are 33°F and lows 16°F, with 9.7 hours of sunshine a day and 6.1 bluebird days, the most of any month. Taking cover, fresh snow, sunshine and rain together, it is the best all-round month at Mammoth Mountain.

Mammoth Mountain in April

Still deep

April still has a deep base, averaging 50in — only a little down on the March peak. It brings 20in of new snow in an average year, with 7 snow days and 1.2 powder days. Average highs are 40°F and lows 21°F, with 11.7 hours of sunshine a day and 3.6 bluebird days.

Mammoth Mountain in May

Late season

In May the base averages 30in, past its March peak of 59in and thinning. It brings 9in of new snow in an average year, with 4 snow days and 0.2 powder days. Average highs are 47°F and lows 26°F, with 13.2 hours of sunshine a day and 2 bluebird days. Expect the odd wet day — 2.8 on average at mid-mountain.

More on Mammoth Mountain

Ski resorts near Mammoth Mountain

Distances are straight-line, not by road.