Hottest and Coldest Temperatures Ever in Boston on August 21

On August 21st in Boston, the weather experienced a range of temperatures throughout history. In 1955, the city reached its hottest point, recording a scorching 97.0°F, whereas in 1964, it faced its coldest temperature of 54.0°F. Despite these extremes, the average temperature on this date stands at 70.80°F, with the average high at 75.53°F and the average low at 66.07°F. In more interesting news from those years, 1955 marked the release of Disneyland's opening ticket sales, and 1964 witnessed The Beatles making their first appearance on The Ed Sullivan Show, captivating millions of viewers across the nation.