Hottest and Coldest Temperatures Ever in Allentown on September 13

On September 13th, Allentown experienced varying temperatures throughout history. The hottest recorded temperature, reaching 93.9°F, was observed in 1952, while the coldest temperature of 39.0°F occurred in 1967. On average, this date sees a temperature of 66.74°F, with the average high at 71.30°F and the average low at 62.18°F. Intriguingly, during the same year as the hottest temperature was recorded, in 1952, the world's first successful surgical separation of conjoined twins occurred, further adding to the historical significance of this date.