Mammoth Lakes, California weather in December
Temperature, rain and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: June – October
Best for skiing: January – April
What is the weather like in Mammoth Lakes, California in December?
In December, Mammoth Lakes, California is freezing cold: daytime highs average 1 °C, and nights often drop below freezing (−10 °C). Expect around 5 hours of sunshine a day. Precipitation, often as snow, falls on about 7 days, totalling 64 mm. Snow falls on about 6 days. All in all, December is not an ideal month for a holiday in Mammoth Lakes, California.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 42 | 31 | 32 |
| Day | 7° | 1° | 1° |
| Night | −5° | −10° | −11° |
| Sun | 6 h | 5 h | 6 h |
| Rain days | 5 | 7 | 7 |
More details for December
- Daylight
- 9 h 35 min07:03 – 16:38
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 10 km/haverage daily peakAll months
- Cloud cover
- 51 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 6 days1 cm or more of fresh snowAll months
- Time zone
- UTC−8America/Los_Angeles
How the score comes together
- Temperatureweight 50 %0 %
- Sunshineweight 20 %37 %
- Few rainy daysweight 30 %80 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Mountain air”.
What to pack in December
- Warm jacket
- Hat, scarf & gloves
Mammoth Lakes, California in December: quick answers
Is Mammoth Lakes, California hot in December?
No. In December, Mammoth Lakes, California is freezing cold: daytime highs average 1 °C and nights drop to about −10 °C.
Does it rain much in Mammoth Lakes, California in December?
Rain falls on about 7 days, adding up to 64 mm.
Mammoth Lakes, California month by month
The whole year in Mammoth Lakes, CaliforniaAll destinations: USAWhere to go in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences