Hottest and Coldest Temperatures Ever in Philadelphia on September 01

On September 1st, Philadelphia experienced varying temperatures throughout the years. The highest temperature ever recorded on this date was 97.0°F in 1953, while the coldest temperature reached 48.9°F in 1963. On average, the temperature for September 1st in Philadelphia is 73.61°F, with an average high of 77.96°F and an average low of 69.26°F. In 1953, the year with the hottest recorded temperature, the United States successfully tested its first hydrogen bomb with a yield of 15 megatons, marking a significant advancement in nuclear technology.