December weather forecast
Yosemite National Park, CA

Part of Merced River in the valley below the Yosemite National Park Mountains, California
Part of Merced River in the valley below the Yosemite National Park Mountains, California

Weather in December

December, the first month of the winter in Yosemite National Park, is also a frosty month, with temperature in the range of an average low of 26.2°F (-3.2°C) and an average high of 47.5°F (8.6°C).

Temperature

In December, the average high-temperature drops from a mild 57.7°F (14.3°C) in November to a frosty 47.5°F (8.6°C). In Yosemite National Park, the average low-temperature is 26.2°F (-3.2°C).

Rainfall

In Yosemite National Park, California, it is raining for 8 days, with typically 5.98" (152mm) of accumulated precipitation. In Yosemite National Park, during the entire year, the rain falls for 65 days and collects up to 36.26" (921mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. During December, Yosemite National Park regularly aggregates up to 12.52" (318mm) of snow. Throughout the year, in Yosemite National Park, California, 65.31" (1659mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 35min of daylight.
On the first day of the month, sunrise is at 6:55 am and sunset at 4:39 pm. On the last day of December, sunrise is at 7:13 am and sunset at 4:48 pm PST.

Sunshine

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

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Yosemite National Park?

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

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

In Yosemite National Park, in December, it is raining for 8 days, with typically 5.98" (152mm) of accumulated precipitation.

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

In Yosemite National Park, California, in December, 12.52" (318mm) of snow is typically accumulated.

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

The month with the shortest days is December, with an average of 9h and 35min of daylight.

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

In Yosemite National Park, the average day length in December is 9h and 35min.

When is the sunrise / sunset in December in Yosemite National Park?

On the first day of December in Yosemite National Park, sunrise is at 6:55 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:48 pm PST.

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

The months with the least sunshine in Yosemite National Park are January and December, with an average of 6h of sunshine.

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

In Yosemite National Park, the average sunshine duration in December is 6h.

What are the months with the lowest UV index in Yosemite National Park?

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

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

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unprotected exposure to UV radiation.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Yosemite National Park, CA

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).

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Average rainfall in December
Yosemite National Park, CA

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 least rainfall) is August (0.2").

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Average rainfall days in December
Yosemite National Park, CA

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).
The months with the least rainy days are July and August (1 days).

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Average snowfall in December
Yosemite National Park, CA

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

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

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Average daylight in December /
Average sunshine in December
Yosemite National Park, CA

Average daylight in December / Average sunshine in December - Yosemite National Park, CA
  • Average daylight in December: 9h and 35min

The month with the longest days is June (Average daylight: 14h and 45min).
The month with the shortest days is December (Average daylight: 9h and 35min).

  • Average sunshine in December: 6h

The month with the most sunshine is July (Average sunshine: 12h).
The months with the least sunshine are January and December (Average sunshine: 6h).

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Average UV index in December
Yosemite National Park, CA

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).
The months with the lowest UV index are January and December (UV index 2).

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