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 progression into December includes a drop in the average high-temperature, from a mild 57.7°F (14.3°C) in November to a chilly 47.5°F (8.6°C). Throughout December nights, Yosemite National Park experiences a consistent temperature average of 26.2°F (-3.2°C).

Rainfall

In Yosemite National Park, California, 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 in Yosemite National Park. During December, Yosemite National Park regularly aggregates up to 12.52" (318mm) of snow. Throughout the year, in Yosemite National Park, 65.31" (1659mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Yosemite National Park, with an average of 9h and 36min of daylight.
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 4:49 pm PST.

Sunshine

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

UV index

The months with the lowest UV index in Yosemite National Park are January and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index, 2 during December, leads to the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.