10 All-Time Hottest Weather Temperature Days in Grand Canyon National ParkFitness Gear & Equipment
These are the ten all-time hottest weather temperature days recorded at the Grand Canyon National Park. The temperatures were recorded at the Phantom Ranch, which is located at the bottom of the canyon. The temperature data for Grand Canyon dates back to 1935.
Some 5 million people a year visit the Grand Canyon, and most visit in the summer when it can get pretty hot. A handful of people die every year in the Grand Canyon, some of them from heat stroke and other heat related problems. If you go to the Grand Canyon, and are going to hike down to the bottom, please be aware that the temperature at the bottom will be significantly hotter than it is at the top.
I once hiked to the bottom of the canyon and when we started at the top there were snow flurries. By the time we reached the Colorado River at the bottom, the temperature was in the 80s. I've listed the ten hottest temperatures at the Phantom Ranch, which is located at the bottom of the canyon. The hottest temperature ever recorded at the top of the Grand Canyon is 101 degrees, which occurred on Jul 11, 2003.
The hottest temperature ever recorded in Grand Canyon National Park is 120 degrees, which occurred on three dates at the Phantom Ranch on August 7, 1981, July 27, 1974 and July 11, 1958. The hottest temperature ever recorded in the state of Arizona is 128 degrees, which occurred on July 29, 1994 at Lake Havasu.
One hundred degree weather days are not uncommon in the Grand Canyon. The earliest date that a 100 degree weather day occurred in the park in any year dating back to 1935 is April 14th. That latest date that a 100 degree temperature day occurred in any year in the park is October 10th.
Every date in the months of May through September in the Grand Canyon dating back to 1935 have had at least one 100 degree day in a year. Every date from April 26th through October 4th have had at least one 100 degree day.
10 All-Time Hottest Weather Temperature Days in the Grand Canyon
T-1. August 7, 1981 - 120 degrees
T-1. July 27, 1974 - 120 degrees
T-1. July 11, 1958 - 120 degrees
T-4. June 26, 1990 - 119 degrees
T-4. July 6, 1989 - 119 degrees
T-4. July 5, 1985 - 119 degrees
T-4. August 12, 1962 - 119 degrees
T-4. June 22, 1954 - 119 degrees
T-9. July 15, 1997 - 118 degrees
T-9. July 7, 1989 - 118 degrees
It has been 118 degrees in the Grand Canyon on other dates, but just the last two are listed above.
As the data also shows, the hottest month of the year in the park is July, which has a daily average temperature of 90.9 degrees, followed by August at 87.7 degrees. The next hottest month is June, which has a daily average temperature of 86.7 degrees, followed by September at 81.0 degrees.