Hottest and Coldest Temperatures Ever in Philadelphia on September 25

On September 25th in Philadelphia, the temperature reached a high of 91.9°F in 1970, marking it as the hottest recorded temperature for this date. Conversely, in 1963, the weather took a much colder turn with a low of 35.1°F, the coldest temperature ever recorded on September 25th. On average, the temperature for this date is 63.94°F, with a typical high of 69.04°F and a low of 58.84°F. In the years referenced, it is interesting to note that Neil Armstrong and Buzz Aldrin successfully completed their historic Apollo 11 mission in 1969, marking the first time humans set foot on the moon.