Hottest and Coldest Temperatures Ever in Boston on May 20

On May 20th, Boston experienced a wide temperature range. The record-breaking high temperature occurred in 1996, with a scorching 91.0°F, while the coldest temperature ever recorded for this date was a chilly 42.1°F in 2002. The average temperature was 59.61°F, with an average high of 65.34°F and an average low of 53.89°F. In 1996, interestingly, the Boston Celtics won the NBA Championship, bringing home their record-breaking 16th title and solidifying their place as one of the most successful basketball teams in history.