The weather observed at WASHINGTON DC, VA (KDCA) at 04:52 PM EST was: The skies were mostly clear. Temperature: 36F ( 2C) Dewpoint: 9F (-13C) Relative Humidity: 32% Winds from the NW (320 degs) at 8 mph. Pressure: 1025.3 millibars. Altimeter:30.28 inches of mercury. The prevailing visibility was 10 miles.