Hottest and Coldest Temperatures Ever in Boston on September 23

On September 23rd in Boston, the records show extreme temperatures of 91.9°F in 1970 as the hottest and 43.0°F in 1955 as the coldest. The average temperature for this date is 62.68°F, with an average high of 67.82°F and an average low of 57.55°F. An interesting news item from those years is that in 1970, the Boston Marathon introduced its first-ever wheelchair division, marking an important milestone in the inclusivity of the iconic race.