The average high temperatures in Yosemite Valley are around 50°F (10°C); the average lows are around 30°F (-1°C).
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The cool season lasts for 3.1 months, from November 21 to February 25, with an average daily high temperature below 61°F. The coldest month of the year in Yosemite Lakes is December, with an average low of 38°F and high of 54°F.
Elevation plays a major role in temperature and precipitation variability. Since Yosemite varies in elevation from 2,000 feet to over 13,000 feet, the lower foothills of the park can be experiencing the rebirth of spring while the higher elevations remain in the grip of winter.
Daytime temperatures in Yosemite Valley sometimes reach 100°F during summer, while nights are cool. Temperatures in Tuolumne Meadows (8,600 feet) in mid-summer are usually in the 70s in the daytime and in the 30s at night.
October Weather in YosemiteThat's a perfect temperature for hiking or rock climbing. However, average nighttime temperatures drop to an average of 51°F (11°C). That can make it a little chilly for camping, but ideal for sipping a hot cup of coffee in the morning while looking out the window at the day to come.
May through September is the most popular time in YosemiteThese months correspond with the best weather and are also when all the roads, trails, lodging, shuttles and attractions in the park are open. That includes its most famous drive, Tioga Rd, a 64-mile-long scenic byway that closes when the snow begins to fall.
If you are into light activity and sightseeing, a medium-weight jacket over layers will suffice. Just in case, bring a hat and gloves to ward off the night chill. Day hikers or treaded walking shoes are necessary whether you are walking a valley trail on a ranger-led hike or heading up steeper trails.
At 4,000 feet in the Yosemite Valley, park temperatures can fluctuate 30 degrees in one day, going from 51 F during the night to 87 F during the day. Be sure to pack light layers for daytime and others that will keep you warm in the evenings, including a winter hat, when the sun sets and cooler air moves in.
Yosemite receives 95% of its precipitation between October and May (and over 75% between November and March). Most of Yosemite is blanketed in snow from about November through May. (Yosemite Valley can be rainy or snowy in any given winter storm.)
Winter is a magical time to visit Yosemite, with opportunities for hiking, playing in the snow, and quiet solitude. The silence and beauty of Yosemite in winter is an unforgettable experience.
The winner: The opportunities for wilderness adventure in Yellowstone are many, but Yosemite has it all, from gentle trails along the floor of the valley to spine-tingling ascents of its rock faces. Plus, Yosemite remains open to many activities through the winter, while Yellowstone goes into bear-like hibernation.
The deer mouse (Peromyscus maniculatus) is the primary reservoir for Sin Nombre Virus, the strain of hantavirus responsible for the human cases in Yosemite National Park, and most human cases in the United States.
The average trip duration for Yosemite touristsMost Yosemite visitors stay between three to four days. After all, there is so much to do and see! Even if you're coming to Yosemite for a specific purpose like a wedding, it's more than worth it to extend your trip.
Yosemite is about 170 miles away from San Francisco and about a 4-hour drive. So, we recommend starting your day as early as 5 AM or 6 AM to have full experience in the park. If you prefer to sleep in while on vacation, something we're all guilty of, you can easily book a hotel.
Visit midweek, rather than on the weekend. Even beyond the standard weekend crowding, Saturdays and holiday weekends are “particularly busy,” according to Yosemite's website. In a reply to a Facebook comment from July 6, Yosemite wrote: “It is much quieter on weekdays — especially during the middle of the week.”
Take a lunch or snacks that includes trail mix and energy bars. Other essentials would be a backpack, sunscreen, sunglasses, a windblocker hat, all weather gloves, and extra socks. Footwear: Warm, waterproof (preferably Gore Tex) hiking boots are essential to keep your feet dry. Gaiters are a definite plus.
American black bears found in Yosemite National Park have long been of intense interest to park visitors and managers. Seeing one of the approximately 300 to 500 black bears in Yosemite can evoke excitement, awe, and fear. If visitors spot a bear while in the park, it is a black bear-not a brown or grizzly bear.
July to September is all you get for many hikes. However, Yosemite has a much wider window and October is a wonderful time to visit the park with access to almost all hikes and attractions as the park remains almost completely open. Make the most of the lighter crowds and longer open seasons, you won't regret it!