Hottest and Coldest Temperatures Ever in Pittsburgh on December 20

On December 20th, Pittsburgh experienced a wide range of temperatures. The highest temperature ever recorded on this day was a balmy 59.0°F back in 1988, while the coldest temperature on record was a bone-chilling -4.0°F in 1963. On average, the temperature hovers around 30.11°F, with a typical high of 39.77°F and a low of 20.44°F. In 1963, when the coldest temperature was observed, Pittsburgh also made headlines by inaugurating the iconic Gateway Clipper fleet, offering scenic river cruises that still remain a popular attraction today.