Hottest and Coldest Temperatures Ever in Philadelphia on May 31

On May 31st, Philadelphia experienced fluctuating temperatures throughout its history. The highest temperature ever recorded was a scorching 97.0°F in 1991, while the coldest temperature reached a chilly 42.1°F in 1965. On average, this date sees a temperature of 69.19°F, with a typical high of 75.09°F and a low of 63.29°F. In an intriguing news item from the past, in 1965, the same year that the coldest temperature was recorded, the Philadelphia 76ers basketball team won its first-ever NBA Championship, clinching the title against the Boston Celtics.