The average annual temperature in Philadelphia is 55.85 degrees Fahrenheit. The annual average high temperature is 64.7 degrees Fahrenheit, and the average low temperature is 47 degrees Fahrenheit.Continue Reading
The warmest months in Philadelphia are June through August, and the coolest months are December through February. According to U.S. Climate Data, in June, July, and August, Philadelphia has average monthly high temperatures of 83, 87, and 85 degrees Fahrenheit. In December, January and February, the average monthly high temperatures are 45, 40 and 44 degrees Fahrenheit.
The average monthly low temperatures for December, January and February are 30, 26, and 28 degrees Fahrenheit. The Weather Channel reports slightly different monthly averages for high and low temperatures in Philadelphia; however, the averages reported by The Weather Channel are within 1 degree of the U.S. Climate Data figures.Learn more about The Northeast