The weather observed at WASHINGTON DC, VA (KDCA) at 06:52 AM EDT was: The skies were partly cloudy. Temperature: 75F ( 24C) Dewpoint: 72F ( 22C) Relative Humidity: 89% Winds from the SW (220 degs) at 5 mph. Pressure: 1016.6 millibars. Altimeter:30.02 inches of mercury. The prevailing visibility was 10 miles.