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 PM EST was:
  The skies were mostly clear.
  Temperature: 72F ( 22C)  Dewpoint:  63F ( 17C)  Relative Humidity:  73%
  Winds from the S  (180 degs) at  8 mph.
  Pressure: 1021.9 millibars.  Altimeter:30.18 inches of mercury.
  The prevailing visibility was 10 miles.