Mammoth Mountain snow history

10 years of snow depth, snowfall and conditions at California, USA · 2,423m to 3,369m

Over the last 10 seasons Mammoth Mountain, USA has averaged 689cm of snowfall, a peak snow depth of 198cm, 16 powder days and 29 bluebird days a year, with skiable cover from around 15 December to 23 May.

Snow history & climate

10-year averages for Mammoth Mountain

689 cm
Snowfall / season
Nov-May total
198 cm
Peak depth
typical season high
16
Powder days
15cm+ in a day
29
Bluebird days
sun after snow
6
Rain days
1mm+ of rain
149
Skiable days
30cm+ 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
Jan145 cm93 cm1mm8.0 h0° / -10°3.34.60.1
Feb148 cm129 cm2mm8.6 h-1° / -11°3.44.70.8
Mar142 cm149 cm1mm9.7 h0° / -9°3.66.10.1
Apr50 cm128 cm5mm11.7 h4° / -6°1.23.60.8
May23 cm77 cm8mm13.2 h8° / -4°0.22.02.8
Jun2 cm26 cm16mm13.7 h16° / 2°0.00.04.4
Jul0 cm2 cm20mm13.8 h21° / 7°0.00.05.6
Aug0 cm0 cm26mm13.0 h20° / 7°0.00.04.0
Sept2 cm0 cm14mm11.8 h16° / 3°0.00.33.8
Oct14 cm2 cm12mm10.5 h11° / -2°0.20.41.8
Nov62 cm10 cm3mm8.7 h4° / -6°1.52.80.7
Dec119 cm46 cm2mm7.6 h0° / -9°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
2025/26498 cm149 cm111984
2024/25526 cm164 cm1428185
2023/24545 cm178 cm1130143
2022/23best1385 cm361 cm3135205
2021/22461 cm159 cm1318154
2020/21leanest380 cm119 cm52796
2019/20400 cm131 cm926163
2018/19951 cm277 cm2136184
2017/18567 cm141 cm1223108
2016/171175 cm301 cm3043168
How these numbers are calculated
  • Powder day — at least 15cm of new snow in 24 hours.
  • Bluebird day — sunshine for at least 60% of daylight, following at least 10cm of snow over the previous 3 days.
  • Rain day — at least 1mm of rain (not snow) at this elevation.
  • Skiable day — at least 30cm of settled snow on the ground.
  • Snow depth is modelled from Open-Meteo / ERA5 reanalysis at 2896m, 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
689 cm
Ahead of 98% of resortsMedian 283 cm

Total new snow between November and May.

Peak snow depth
among the very best we track
198 cm
Ahead of 90% of resortsMedian 84 cm

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 15cm 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 1mm or more of rain, not snow.

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

Days holding 30cm or more of settled snow.

The season at Mammoth Mountain

Typical stretch holding 30cm or more of settled snow, averaged over the record.

SeptOctNovDecJanFebMarAprMayJunJulAug
Cover arrives
15 December
Season ends
23 May
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
149cm average depth
Most new snow
February
148cm 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 2896m 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 689cm 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 283cm.

Season to season the spread is wide. The best of the last 10 winters was 2022/23 with 1385cm, and the leanest was 2020/21 with 380cm — a difference of 1005cm between a good year and a poor one. The most recent complete season, 2025/26, delivered 498cm.

February is reliably the snowiest month, averaging 148cm 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 198cm 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 84cm.

The base is deepest in March, averaging 149cm through the month and topping out around 173cm in a typical year.

How many powder days does Mammoth Mountain get?

Counting any day that delivers at least 15cm 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 10cm 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 1mm 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 8mm 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 30cm of settled snow from around 15 December through to 23 May, 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 2896m. Corpus last rebuilt 2 September 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 10cm through the month. It brings 62cm of new snow in an average year, with 6 snow days and 1.5 powder days. Average highs are 4°C and lows -6°C, 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 46cm and deepening towards its March peak. It brings 119cm of new snow in an average year, with 8 snow days and 2.5 powder days. Average highs are 0°C and lows -9°C, 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 93cm. It is the second-snowiest month of the season, with 145cm of new snow on average, 8 snow days and 3.3 powder days. Average highs are 0°C and lows -10°C, 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 129cm. It is the snowiest month of the season, with 148cm of new snow on average, 9 snow days and 3.4 powder days. Average highs are -1°C and lows -11°C, 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 149cm through the month and peaking around 173cm in a typical year. It is the third-snowiest month of the season, with 142cm of new snow on average, 10 snow days and 3.6 powder days. Average highs are 0°C and lows -9°C, 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 128cm — only a little down on the March peak. It brings 50cm of new snow in an average year, with 7 snow days and 1.2 powder days. Average highs are 4°C and lows -6°C, with 11.7 hours of sunshine a day and 3.6 bluebird days.

Mammoth Mountain in May

Late season

In May the base averages 77cm, past its March peak of 149cm and thinning. It brings 23cm of new snow in an average year, with 4 snow days and 0.2 powder days. Average highs are 8°C and lows -4°C, 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.