The month in detail
What to expect in September
Off-season for skiing Mammoth Mountain — lifts are closed. Consider hiking, mountain biking or summer activities at altitude. Rain risk remains low (6% of days), leaving good room for outdoor activities.
September ranks 4 out of 12 months in Mammoth Mountain. Compared to August: −4°C daytime, −0.7h of sun per day.
This month's conditions
What it's like in September
UV index
7 · high
sunscreen and hat advised
Feels like
dry air
-2°
Daylight
12.2h of daylight
Air quality
good
AQI 37
Compare
Is September the right month?
The best month in Mammoth Mountain is July (9.0/10), 0.8 pt higher than September.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Mammoth Mountain
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Mammoth Mountain
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a mountain stay.
Country · United States
🗣️LanguageEnglish
💶CurrencyUS Dollar ($)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5
🌡️ Climate
🌍Climate typeAlpine mountain climate
📈Climate trend ⓘStable
🔥Hottest monthJuly · 25°C
❄️Coolest monthJanuary · 1°C
🌧️Rainiest month ⓘFebruary · 27%
🏔️ Mountain stay
⛰️Village altitude2424 m
🎿Ski area2424 → 3370 m
⛷️Ski seasonDec → May
🥾Hiking seasonJun → Sep
🧗High mountains ⓘGuide recommended
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Similar climate
Lake TahoeUnited StatesSteamboat SpringsUnited StatesPark CityUnited StatesSun ValleyUnited StatesAspenUnited States
Location
Where is Mammoth Mountain ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
United StatesAlpine mountain climate climate with a 9.0 → 4.0 gap between best and worst month. 10 years of ERA5 data to choose by project.
37.63°N · 118.97°W
Questions
Frequently asked questions
When is the best time to visit Mammoth Mountain?
It depends on the activity. For skiing: March (ski score 8.3/10). For hiking/summer: June (9.3/10, 21.0°C).
Can you ski in Mammoth Mountain in winter?
Yes, it's peak ski season. Average ski score December–February: 8.1/10. Cold temperatures (1°C max in January) and frequent snowfall.
Is it warm in Mammoth Mountain in summer?
In June, temperatures average 21.0°C. Best period for hiking and outdoor activities.
What is the wettest month in Mammoth Mountain?
November is the wettest month with November has the lowest climate score of the year.
Do you need sun protection in Mammoth Mountain in September?
The average UV index reaches 7 in September in Mammoth Mountain (high), with about 12.2h of daylight. Sunscreen and hat advised.