December weather forecast
Yosemite National Park, CA

December in Yosemite National Park is characterized by a definitive winter setting, with snowfall averaging 12.5" (318mm). The cold weather becomes considerably persistent, bringing the charm of a white Christmas. Daylight is shortest in this month, plunging the park into evening darkness earlier. While outdoor activities are limited due to the chilly weather and lesser sunlight, the snow-covered park provides a unique visual feast. Enjoying a cozy cabin stay or marveling at the frozen waterfalls are popular options amongst December attendees.

Temperature

Yosemite National Park's transition into December involves a shift in temperature, receding from a moderate 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 during the month of December is a subzero cold 26.2°F (-3.2°C).

Rainfall

In Yosemite National Park, in December, during 8 rainfall days, 5.98" (152mm) of precipitation is typically accumulated. 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, 65.31" (1659mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 36min 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 4:49 pm PST.

Sunshine

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

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for average individuals.
Note: A daily maximum UV index of 2 in December translates into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.