The weather observed at WASHINGTON DC, VA (KDCA) at 03:52 PM EST was: The skies were mostly clear. Temperature: 34F ( 1C) Dewpoint: 11F (-12C) Relative Humidity: 38% Winds from the NW (330 degs) at 15 mph. Pressure: 1032.7 millibars. Altimeter:30.50 inches of mercury. The prevailing visibility was 10 miles.