Hottest and Coldest Temperatures Ever in Allentown on April 21

On April 21st in Allentown, the weather conditions vary based on historical data. The hottest temperature ever recorded was 89.1°F in 1985, while the coldest temperature was 28.0°F in 1956. The average temperature for this date is 54.17°F, with an average high of 61.09°F and an average low of 47.26°F. In a fascinating news item from the past, in 1985, the year of the highest recorded temperature, a groundbreaking scientific discovery was made related to the ozone layer, highlighting the importance of monitoring and understanding weather patterns for environmental preservation.