Hottest and Coldest Temperatures Ever in Boston on March 21

On March 21st in Boston, the weather has seen fluctuations over the years. The highest temperature ever recorded on this date was 78.1°F in 2012, while the coldest temperature was 10.9°F in 1986. On average, the temperature for this day stands at 38.80°F, with an average high of 43.78°F and an average low of 33.82°F. Looking back, it is worth noting that in the year 1986, during the extreme cold, Boston experienced heavy snowfall on March 21st, causing travel disruptions throughout the city.