The weather observed at WASHINGTON DC, VA (KDCA) at 09:52 PM EST was: The skies were cloudy. Temperature: 44F ( 7C) Dewpoint: 27F ( -3C) Relative Humidity: 51% Winds from the NW (310 degs) at 9 mph. Pressure: 1021.7 millibars. Altimeter:30.17 inches of mercury. The prevailing visibility was 10 miles.