December weather forecast and climate
Mammoth Lakes, CA

What is the temperature in December in Mammoth Lakes?

The average high-temperature, in December, in Mammoth Lakes, California, is 41.2°F (5.1°C), while the average low-temperature is 16.5°F (-8.6°C).

How many days does it rain in December in Mammoth Lakes?

In Mammoth Lakes, during December, the rain falls for 8 days and regularly aggregates up to 4.1" (104.9mm) of precipitation.

How much does it snow in Mammoth Lakes in December?

Throughout December, 45.3" (1150.6mm) of snow is accumulated.

What is the snowiest month in Mammoth Lakes?

The month with the most snowfall is December when 45.3" (1150.6mm) of snow is typically aggregated.
Average temperature in December - Mammoth Lakes, CA
  • Average high temperature in December: 41.1°F

The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in December: 16.5°F

The month with the highest average low temperature is July (45.3°F).
The coldest month (with the lowest average low temperature) is January (14.8°F).

Average rainfall in December - Mammoth Lakes, CA
  • Average rainfall in December: 4.1"

The wettest month (with the highest rainfall) is January (4.6").
The driest month (with the lowest rainfall) is August (0.3").

Average rainfall days in December - Mammoth Lakes, CA
  • Average rainfall days in December: 8 days

Months with the highest number of rainy days are January and February (9 days).
Months with the lowest number of rainy days are August and September (2 days).

Average snowfall in December - Mammoth Lakes, CA
  • Average snowfall in December: 45.3"

The month with the highest snowfall is December (45.3").
Months with the lowest snowfall are July, August and September (0").

Average daylight in December / Average sunshine in December - Mammoth Lakes, CA
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).

  • Average sunshine in December: 6h

The month with most sunshine is July (Average sunshine: 12h).
The month with least sunshine is December (Average sunshine: 6h).

Average UV index in December - Mammoth Lakes, CA
  • Average UV index in December: 2

Months with the highest UV index are June and July (UV index 11).
The month with the lowest UV index is December (UV index 2).

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