Hottest and Coldest Temperatures Ever in Washington DC on May 21

On May 21st in Washington D.C., the temperatures have varied over the years. The highest temperature on record was a scorching 93.9°F in 1996, while the coldest temperature dropped to 43.0°F in 1992. Typically, the average temperature for this date stands at 66.78°F, with an average high temperature of 72.40°F and an average low temperature of 61.17°F. Interestingly, in 1992, during a chilly May, a historic event took place as Johnny Carson hosted The Tonight Show for the last time after a remarkable 30-year run as its host.