Hottest and Coldest Temperatures Ever in Boston on November 21

On November 21st, Boston experienced varying temperatures throughout history. The hottest recorded temperature on this day was a scorching 70.0°F in 1953, while the coldest 16.0°F chilled the city in 1987. The average temperature for this date is 42.75°F, with an average high of 48.91°F and an average low of 36.59°F. In the year 1953, when Boston reached its highest temperature, NASA's James D. Watson and Francis Crick made a groundbreaking discovery by proposing the structure of DNA, forever shaping our understanding of genetics.