The weather observed at WASHINGTON DC, VA (KDCA) at 06:52 PM EDT was: The skies were cloudy. Temperature: 84F ( 29C) Dewpoint: 72F ( 22C) Relative Humidity: 66% Winds from the ENE(070 degs) at 8 mph. Pressure: 1017.4 millibars. Altimeter:30.04 inches of mercury. The prevailing visibility was 10 miles.