The weather observed at WASHINGTON DC, VA (KDCA) at 03:52 PM EDT was: The skies were cloudy. Temperature: 84F ( 29C) Dewpoint: 75F ( 24C) Relative Humidity: 74% Winds from the S (180 degs) at 13 mph. Pressure: 1016.5 millibars. Altimeter:30.02 inches of mercury. The prevailing visibility was 10 miles.