Hottest and Coldest Temperatures Ever in Philadelphia on September 22

On September 22nd in Philadelphia, the weather was relatively mild compared to extreme historical temperatures. The hottest temperature ever recorded on this date was 93.9°F back in 1970, while the coldest temperature dipped to 39.0°F in 1962. The average temperature for this day is typically 66.68°F, with an average high of 72.28°F and an average low of 61.07°F. In 1970, the same year Philadelphia experienced its hottest September 22nd, an interesting news item was the introduction of the Boeing 747, the first jumbo jet airliner, revolutionizing air travel with its capacity and design.