10 All-Time Hottest Weather Temperature Days in Yosemite National ParkLocal Reviews
These are the ten all-time hottest weather temperature days recorded at the Yosemite National Park Headquarters in Yosemite Valley in California. The temperature data for Yosemite dates back to 1905.
Almost 4 million people a year visit Yosemite National Park, and most visit in the summer when it can get pretty hot. The hot temperatures in Yosemite in the summer can contribute to people dying in the park. Most people do not expect 100 degree weather in Yosemite, and when it happens they can suffer from dehydration and sun stroke and make bad decisions. Some people will fall off ledges, fall down slopes, go over waterfalls while trying to cool off in rivers above the waterfalls, or make other bad decisions due to the heat.
The hottest temperature ever recorded in Yosemite National Park is 115 degrees, which occurred on July 20, 1915. The hottest temperature ever recorded in the state of California is 134 degrees, which occurred on July 10, 1913 in Death Valley.
One hundred degree weather days are not uncommon in Yosemite. The earliest date that a 100 degree weather day occurred in the park in any year dating back to 1905 is June 11th. That latest date that a 100 degree temperature day occurred in any year in the park is September 20th.
Every date in the months of July and August in Yosemite Park dating back to 1905 have had at least one 100 degree day in a year. Every date from June 20th through September 7th have had at least one 100 degree day.
10 All-Time Hottest Weather Temperature Days in Yosemite
1. July 20, 1915 - 115 degrees
T-2. July 24, 1915 - 112 degrees
T-2. July 22, 1915 - 112 degrees
T-4. July 23, 1915 - 111 degrees
T-4. July 21, 1915 - 111 degrees
T-6. July 25, 1915 - 110 degrees
T-6. July 19, 1915 - 110 degrees
T-6. August 7, 1914 - 110 degrees
T-6. August 5, 1914 - 110 degrees
10. August 2, 1977 - 109 degrees
As the data above shows, the hottest year in Yosemite history was clearly 1915, as seven of the 10 all-time hottest temperature in the park occurred in that year.
As the data also shows, the hottest month of the year in the park is July, which has a daily average temperature of 73.0 degrees, followed closely by August at 72.7 degrees. The next hottest month is September, which has a daily average temperature of 66.6 degrees, followed by June at 65.5 degrees.