The weather observed at WASHINGTON DC, VA (KDCA) at 09:52 AM EDT was: The skies were mostly cloudy. Temperature: 82F ( 28C) Dewpoint: 61F ( 16C) Relative Humidity: 48% Winds from the NW (300 degs) at 22 mph. Pressure: 1004.0 millibars. Altimeter:29.65 inches of mercury. The prevailing visibility was 10 miles.