Surface observations

Data from the National Weather Service, made available here by the UAlbany Department of Atmospheric and Environmental Sciences


The weather observed at PHILADELPHIA, PA (KPHL) at 03:54 AM EST was:
  The skies were mostly clear.
  Temperature: 43F (  6C)  Dewpoint:  23F ( -5C)  Relative Humidity:  45%
  Winds from the NW (310 degs) at  9 mph.
  Pressure: 1010.9 millibars.  Altimeter:29.85 inches of mercury.
  The prevailing visibility was 10 miles.