Surface observations

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

The weather observed at WASHINGTON DC, VA (KDCA) at 02:52 PM EDT was:
  The skies were partly cloudy.
  Temperature: 82F ( 28C)  Dewpoint:  46F (  8C)  Relative Humidity:  28%
  Winds from the N  (350 degs) at  6 mph.
  Pressure: 1014.5 millibars.  Altimeter:29.96 inches of mercury.
  The prevailing visibility was 10 miles.