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 05:52 PM EDT was:
  The skies were mostly cloudy.
  Temperature: 81F ( 27C)  Dewpoint:  57F ( 14C)  Relative Humidity:  45%
  Winds from the E  (090 degs) at 10 mph.
  Pressure: 1020.9 millibars.  Altimeter:30.15 inches of mercury.
  The prevailing visibility was 10 miles.