Hottest and Coldest Temperatures Ever in Boston on July 21

On July 21st in Boston, the weather can be quite varied. According to historical records, the highest temperature ever recorded on this date was 102.0°F in 1977, while the lowest temperature was 55.9°F back in 1950. However, on average, the temperature typically falls around 74.47°F, with highs reaching an average of 79.39°F and lows dropping to 69.55°F. In an interesting news item from 1977, the year of the highest recorded temperature, the anthem "Boston" by the band Augustana was released, becoming a popular hit worldwide.