Mammoth Lakes weather in December 2026

Expect daytime maximum temperatures of 39°F in Mammoth Lakes, California in December based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 4.7 inches of rainfall in the month, which might fall as snow.

  • 39°F maximum daytime temperature in December in Mammoth Lakes39
    39°F max day temperature
  • 6 hours of sunshine per day
  • 6 days with some rainfall in December in Mammoth Lakes6
    6 days with some rainfall
  • 16°F minimum night-time temperature in December in Mammoth Lakes16
    16°F min night temperature
  • 10 hours of daylight per day in December in Mammoth Lakes10
    10 hours of daylight per day
  • No heat & humidity in December in Mammoth Lakes0
    No heat & humidity
  • 4.7 inches monthly rainfall in December in Mammoth Lakes4.7
    4.7 inches of monthly rainfall
  • UV (maximum) index 2 (Low) in December in Mammoth Lakes2
    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)  |  Imperial (°F)

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More about California

How hot is it in Mammoth Lakes in December?

Daytime temperatures usually reach 68°F in Mammoth Lakes in December, falling to 46°F 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 2.1 inches.

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.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st December 2026 06:52 16:38
Wednesday, 16th December 2026 07:04 16:39
Thursday, 31st December 2026 07:11 16:47

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