Hottest and Coldest Temperatures Ever in Allentown on December 19

On December 19th in Allentown, the weather varied between extremes throughout history. The hottest temperature on record occurred in 1957, reaching a remarkable 59.0°F, while the coldest temperature was experienced more recently in 2020, with temperatures dropping to a chilling 5.2°F. On this date, the average temperature stands at 31.40°F, with an average high temperature of 37.76°F and an average low temperature of 25.04°F. As an interesting snippet from history, in 1957, renowned physicist Hugh Everett published the "Many-Worlds Interpretation," a groundbreaking theory proposing parallel universes, captivating the scientific community.