Hottest and Coldest Temperatures Ever in Allentown on April 01

On April 1st in Allentown, the weather has seen quite a range of temperatures throughout history. The hottest recorded temperature on this day was a scorching 84.0°F back in 1978, while the coldest it ever got was a chilly 19.0°F in 1969. On average, the temperature for this date is 46.98°F, with a high of 54.13°F and a low of 39.83°F. Interestingly, in 1978, when Allentown experienced its hottest April 1st, a groundbreaking technology was introduced to the world—the first ever cellular mobile telephone system was successfully tested in Chicago, marking the beginning of a technological revolution.