Hottest and Coldest Temperatures Ever in Washington DC on May 15

On May 15th in Washington D.C., historical weather records show a range of temperatures. The hottest temperature ever recorded on this date occurred in 1962, reaching a scorching 93.9°F, while the coldest temperature was recorded in 2002 at a chilly 45.0°F. The average temperature for May 15th stands at 65.62°F, with an average high of 70.33°F and an average low of 60.91°F. In the year 1962, while experiencing the highest temperature, an interesting news item was the launch of the first communications satellite, Telstar, which successfully transmitted the first live transatlantic television signals.