January weather forecastYosemite National Park, CA

Weather in January

In Yosemite National Park, the first month of the year sees the lowest average temperatures, rendering the park a snowy winter wonderland. With temperatures lingering between 25.6°F (-3.6°C) and 47.2°F (8.4°C), January tops other months with a maximum snow accumulation of 16.2" (411mm). The weather remains brisk and mostly cloudy throughout the month. The chilly ambience gives way to just 6 hours of average sunshine per day. The 9.9 hours of daylight serve as perfect conditions for tourists seeking a frosty paradise brimming with scenic snow-capped views.

Temperature

Yosemite National Park notes the coldest temperatures in January, with a high average of 47.1°F (8.4°C) and a low of 25.5°F (-3.6°C).

Rainfall

January is the month with the most rainfall in Yosemite National Park. Rain falls for 9 days and accumulates 6.5" (165mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. The month with the most snowfall is January, when 16.22" (412mm) of snow is typically aggregated.

Daylight

In January, the average length of the day is 9h and 54min.
On the first day of January, sunrise is at 7:13 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 5:19 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 low threat to health from exposure to the Sun's UV radiation for the average person.
Note: In January, the average maximum UV index of 2 translates into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.