The weather observed at WASHINGTON DC, VA (KDCA) at 04:52 PM EDT was: The skies were cloudy. Temperature: 84F ( 29C) Dewpoint: 70F ( 21C) Relative Humidity: 63% Winds from the S (180 degs) at 5 mph. Pressure: 1010.1 millibars. Altimeter:29.83 inches of mercury. The prevailing visibility was 10 miles.