Hottest and Coldest Temperatures Ever in Philadelphia on May 21

On May 21st in Philadelphia, the temperature has ranged from the hottest recorded at 91.0°F in 1996 to the coldest recorded at 41.0°F in 2002. The average temperature for this date stands at 63.80°F, with an average high of 69.21°F and an average low of 58.38°F. In 1996, the same year when the hottest temperature was recorded, an interesting news item revealed that Philadelphia became the birthplace of the first website dedicated to online grocery shopping, marking a significant shift in consumer behavior and e-commerce trends.