The weather observed at WASHINGTON DC, VA (KDCA) at 02:52 PM EDT was: The skies were partly cloudy. Temperature: 86F ( 30C) Dewpoint: 68F ( 20C) Relative Humidity: 55% Winds from the S (170 degs) at 12 mph. Pressure: 1019.8 millibars. Altimeter:30.11 inches of mercury. The prevailing visibility was 10 miles.