Hottest and Coldest Temperatures Ever in Allentown on May 21

On May 21st in Allentown, the weather is typically mild and pleasant, with an average temperature of 62.31°F. The highest temperature ever recorded on this date was 89.1°F in 1996, while the lowest was 32.0°F in 2002. Residents can expect an average high temperature of 67.78°F and an average low temperature of 56.84°F. In 1996, an interesting news item occurred when Allentown hosted its first-ever music festival, attracting renowned artists and providing a platform to showcase local talent.