Mammoth Lakes weather in December 2026

Q: How hot is it in Mammoth Lakes in December?

Daytime temperatures usually reach 20°C in Mammoth Lakes in December, falling to 8°C at night.

Q: How sunny is it in Mammoth Lakes in December?

There are normally 7 hours of bright sunshine each day in Mammoth Lakes in December - that's 69% of daylight hours.

Q: Does it rain in Mammoth Lakes in December?

There are usually 5 days with some rain in Mammoth Lakes in December and the average monthly rainfall is 53mm.

Expect daytime maximum temperatures of 4°C in Mammoth Lakes, California in December based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 119 mm of rainfall in the month, which might fall as snow.

4
4°C max day temperature
6
6 hours of sunshine per day
6
6 days with some rainfall
-9
-9°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
119
119 mm of monthly rainfall
2
2 (Low) UV index

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The December weather guide for California (Mammoth Lakes) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

More about California

How hot is it in Mammoth Lakes in December?

Daytime temperatures usually reach 20°C in Mammoth Lakes in December, falling to 8°C at night.

How sunny is it in Mammoth Lakes in December?

There are normally 7 hours of bright sunshine each day in Mammoth Lakes in December - that's 69% of daylight hours.

Does it rain in Mammoth Lakes in December?

There are usually 5 days with some rain in Mammoth Lakes in December and the average monthly rainfall is 53mm.

Mammoth Lakes December sunrise & sunset times

Browse the sunrise and sunset times for Mammoth Lakes in December 2026. Select a month to view Mammoth Lakes sunrise and sunset times for the next 12 months.

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