The weather observed at PHILADELPHIA, PA (KPHL) at 09:54 PM EDT was: The skies were mostly cloudy. Temperature: 66F ( 19C) Dewpoint: 61F ( 16C) Relative Humidity: 83% Winds from the S (190 degs) at 5 mph. Pressure: 1019.6 millibars. Altimeter:30.11 inches of mercury. The prevailing visibility was 10 miles.