Hottest and Coldest Temperatures Ever in Allentown on May 09

On May 9th in Allentown, Pennsylvania, temperatures have historically ranged from a scorching 91.0°F in 1979 to a chilly 30.9°F in 1956. The average temperature for this date is typically a pleasant 58.75°F, with an average high of 64.97°F and an average low of 52.52°F. In the year 1979, during a heatwave, Allentown experienced its hottest recorded temperature. Interestingly, during that same year, Sony introduced its first portable Walkman, revolutionizing the way people enjoy music on the go.