Hottest and Coldest Temperatures Ever in Philadelphia on December 18

On December 18th in Philadelphia, the temperature reached a maximum of 70.0°F in 2006, making it the hottest day on record for that date. However, in 1960, it was a stark contrast with the coldest temperature ever recorded at 10.0°F. The average temperature for December 18th is 35.58°F, with an average high of 42.34°F and an average low of 28.82°F. In 2006, an interesting news item occurred when Philadelphia hosted Super Bowl XXXIX at Lincoln Financial Field, where the New England Patriots defeated the Philadelphia Eagles with a final score of 24-21.