October weather forecast
Yosemite National Park, CA

October in Yosemite National Park brings a noticeable dip in temperature, hinting at the approaching winter season. As the park transitions from fall to winter, a slight increase in rainfall to 1.9" (48mm) is observed from the previous month. Cooler temperatures pervade, and fewer hours of sunshine bathe the expansive parkland. This transition phase brings forth the breathtaking beauty of the park with color-splattered trees and a crisp air. The weekend visitors can relish longer hikes without the summer's heat or the winter's chill.

Temperature

October's arrival in Yosemite National Park corresponds with a decrease in average high-temperatures, from September's 83.5°F (28.6°C) to a still warm 73.6°F (23.1°C). Yosemite National Park records a pronounced decline from the day's peak to an average nighttime low-temperature of 38.3°F (3.5°C) throughout October.

Rainfall

In Yosemite National Park, California, in October, during 4 rainfall days, 1.93" (49mm) 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. October is the first month it typically snows. Throughout October, Yosemite National Park receives 0.2" (5mm) of snow. In Yosemite National Park, during the entire year, snow aggregates up to 65.31" (1659mm).

Daylight

In October, the average length of the day is 11h and 12min.
On the first day of October in Yosemite National Park, sunrise is at 6:54 am and sunset at 6:40 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 6:00 pm PDT.

Sunshine

The average sunshine in October is 9h.

UV index

The average daily maximum UV index in October in Yosemite National Park is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 5 in October translates into these instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. It's recommended to limit sun exposure when its radiation is at its peak during midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.