What Is the Hottest Day On Record In the United States?

The hottest day on record in the United States happened on July 10, 1918, in Greenland Ranch, California (in Death Valley), when the thermometer reached 134° Fahrenheit.

Death Valley is an arid desert basin that covers parts of eastern California and western Nevada.

At one time or another, every U.S. state has recorded a high temperature of 100° Fahrenheit or more.