The weather observed at PHILADELPHIA, PA (KPHL) at 12:54 AM EDT was: The skies were mostly cloudy. Temperature: 75F ( 24C) Dewpoint: 64F ( 18C) Relative Humidity: 69% Winds from the CLM(CLM degs) at 0 mph. Pressure: 1019.8 millibars. Altimeter:30.12 inches of mercury. The prevailing visibility was 10 miles. The maximum temperature in the past 24 hours was 85F. The minimum temperature in the past 24 hours was 68F.