Surface observations

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

The weather observed at WASHINGTON DC, VA (KDCA) at 05:52 AM EDT was:
  The skies were partly cloudy.
  Temperature: 72F ( 22C)  Dewpoint:  57F ( 14C)  Relative Humidity:  60%
  Winds from the S  (190 degs) at 12 mph.
  Pressure: 1022.1 millibars.  Altimeter:30.18 inches of mercury.
  The prevailing visibility was 10 miles.