Hottest and Coldest Temperatures Ever in Allentown on July 21

On July 21, Allentown experienced a range of temperatures, with the hottest ever recorded at 100.9°F in 1980 and the coldest at 48.9°F in 1965. The average temperature for this date is 75.56°F, with an average high of 79.60°F and an average low of 71.52°F. In the year 1980, aside from the scorching heat, an interesting news item was reported: the Rubik's Cube, a popular puzzle toy, was officially introduced to the United States, captivating people's minds and becoming a worldwide sensation.