The weather observed at PHILADELPHIA, PA (KPHL) at 01:54 PM EST was: The skies were mostly cloudy. Temperature: 36F ( 2C) Dewpoint: 18F ( -8C) Relative Humidity: 48% Winds from the N (350 degs) at 3 mph. Pressure: 1020.5 millibars. Altimeter:30.14 inches of mercury. The prevailing visibility was 10 miles.