Hottest and Coldest Temperatures Ever in Boston on March 18

On March 18th, in Boston, the temperature ranged from a record-breaking high of 73.9°F in 2012 to a chilly low of 7.0°F in 1967. The average temperature for this date is 36.90°F, with an average high of 43.25°F and an average low of 30.56°F. In 2012, not only did Boston experience its hottest March 18th, but it was also a leap year, meaning it had an extra day in February. This aligning of events sparked excitement and a festive atmosphere in the city, as locals celebrated the unusual warmth and the uniqueness of the leap year.