Hottest and Coldest Temperatures Ever in Allentown on September 25

On September 25th in Allentown, historical weather data reveals that the highest temperature ever recorded was 91.9°F in 1970, while the coldest temperature happened in 1963 at 33.1°F. The average temperature for this date stands at 60.85°F, with an average high temperature of 66.00°F and an average low temperature of 55.71°F. In an interesting news item from the past, 1970 also marked the establishment of the first Earth Day, a global event celebrated annually to highlight environmental consciousness and encourage sustainable practices.