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 12:52 PM EST was:
  The skies were mostly clear.
  Temperature: 39F (  4C)  Dewpoint:   6F (-14C)  Relative Humidity:  25%
  Winds from the NW (320 degs) at 13 mph.
  Pressure: 1031.5 millibars.  Altimeter:30.46 inches of mercury.
  The prevailing visibility was 10 miles.
  The maximum temperature in the past 6 hours was  39F.
  The minimum temperature in the past 6 hours was  31F.