Hottest and Coldest Temperatures Ever in Philadelphia on May 20

On May 20th, Philadelphia experienced various temperature extremes. In 1962, the city reached its hottest temperature ever recorded at 93.9°F, while in 2002, it recorded its coldest temperature at 43.0°F. The average temperature for this date stands at 64.02°F, with an average high of 69.75°F and an average low of 58.28°F. In the year 1962, an interesting news item was the launch of the world's first active communications satellite, Telstar, which revolutionized long-distance communication and paved the way for modern global communication systems.