The weather observed at PHILADELPHIA, PA (KPHL) at 10:54 AM EDT was: The skies were mostly cloudy. Temperature: 81F ( 27C) Dewpoint: 61F ( 16C) Relative Humidity: 51% Winds from the VRB(VRB degs) at 3 mph. Pressure: 1021.9 millibars. Altimeter:30.18 inches of mercury. The prevailing visibility was 10 miles.