Yosemite National Park
California, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Yosemite National Park, CA

Part of Merced River in the valley below the Yosemite National Park Mountains, California, with clear blue skies
Part of Merced River in the valley below the Yosemite National Park Mountains, California, with clear blue skies
December is a cold winter month with the average temperatures in the range of a freezing 28°F (-2.2°C) to a mild 48°F (8.9°C). The sun rarely gets a chance to break the cloud cover as abundant rain to the tune of 6" (152.4mm) maintains wetness in the short days.
However, the sun manages to shine over the amazing white scenery for an average of 6 hours a day. A large amount of snow that measures up to 12.5" (317.5mm) keeps the crowds at bay.
Most of the trails close as Yosemite shivers in the icy conditions, and it is mandatory for visitors to wear their warmest winter coats.

What is the temperature in December in Yosemite National Park?

In December, in Yosemite National Park, California, the average high-temperature is 47.5°F (8.6°C), and the average low-temperature is 26.2°F (-3.2°C).

How many days does it rain in December in Yosemite National Park?

In Yosemite National Park, in December, during 8 rainfall days, 6" (151.6mm) of precipitation is typically accumulated.

How much does it snow in Yosemite National Park in December?

Throughout December, in Yosemite National Park, 12.5" (317.5mm) of snow is accumulated.

What is the month with the shortest days in Yosemite National Park?

The month with the shortest days in Yosemite National Park, California, is December, with an average of 9.6h of daylight.

What is the average length of the day in December in Yosemite National Park?

In Yosemite National Park, California, the average length of the day in December is 9.6h.

What is the month with the least sunshine in Yosemite National Park?

Months with the least sunshine are January and December, with an average of 6h of sunshine.

How many hours of sunshine does Yosemite National Park have in December?

The average sunshine in December in Yosemite National Park is 6h.

What is the month with the lowest UV index in Yosemite National Park?

Months with the lowest UV index in Yosemite National Park, California, are January and December, with an average maximum UV index of 2.

What is the UV index reading in December in Yosemite National Park?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to the Sun's UV rays.
Average temperature in December - Yosemite National Park, CA
  • Average high temperature in December: 47.5°F

The warmest month (with the highest average high temperature) is July (89.9°F).
The month with the lowest average high temperature is January (47.2°F).

  • Average low temperature in December: 26.2°F

The month with the highest average low temperature is July (53.2°F).
The coldest month (with the lowest average low temperature) is January (25.6°F).

Average rainfall in December - Yosemite National Park, CA
  • Average rainfall in December: 6"

The wettest month (with the highest rainfall) is January (6.5").
The driest month (with the lowest rainfall) is August (0.2").

Average rainfall days in December - Yosemite National Park, CA
  • Average rainfall days in December: 8 days

The month with the highest number of rainy days is March (10 days).
Months with the lowest number of rainy days are July and August (1 days).

Average snowfall in December - Yosemite National Park, CA
  • Average snowfall in December: 12.5"

The month with the highest snowfall is January (16.2").
Months with the lowest snowfall are June, July, August and September (0").

Average daylight in December / Average sunshine in December - Yosemite National Park, CA
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.8h).
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).
Months with least sunshine are January and December (Average sunshine: 6).

Average UV index in December - Yosemite National Park, CA
  • Average UV index in December: 2

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