The weather observed at PHILADELPHIA, PA (KPHL) at 05:54 PM EST was: The skies were mostly cloudy. Temperature: 39F ( 4C) Dewpoint: 25F ( -4C) Relative Humidity: 56% Winds from the SW (210 degs) at 7 mph. Pressure: 1004.1 millibars. Altimeter:29.65 inches of mercury. The prevailing visibility was 10 miles.