Hottest and Coldest Temperatures Ever in Philadelphia on September 23

On September 23rd in Philadelphia, temperatures have ranged from a scorching 95.0°F in 1970 to a chilly 39.9°F in 1983. The average temperature for this date is 65.83°F, with an average high of 72.06°F and an average low of 59.61°F. In the midst of these weather fluctuations, an intriguing event occurred in 1970 when the first Earth Day was celebrated, raising awareness about environmental issues and inspiring global action to protect our planet.