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 02:52 PM EDT was:
  The skies were partly cloudy.
  Temperature: 86F ( 30C)  Dewpoint:  68F ( 20C)  Relative Humidity:  55%
  Winds from the S  (170 degs) at 12 mph.
  Pressure: 1019.8 millibars.  Altimeter:30.11 inches of mercury.
  The prevailing visibility was 10 miles.