Hottest and Coldest Temperatures Ever in Philadelphia on September 20

On September 20th in Philadelphia, the weather varied significantly over the years. In 1983, temperatures soared to an extraordinary 90.0°F, setting a record for the hottest temperature ever recorded on this date. Conversely, in 1956, the city experienced its coldest September 20th with a chilling 45.0°F. On average, the temperature settles around 67.03°F, with a high of 71.52°F and a low of 62.55°F. As an interesting news item from those years, it's worth mentioning that in 1983, the Philadelphia Phillies won their fifth National League pennant, securing a spot in the World Series against the Baltimore Orioles.