The weather observed at WASHINGTON DC, VA (KDCA) at 10:52 AM EST was: The skies were cloudy. Temperature: 45F ( 7C) Dewpoint: 32F ( 0C) Relative Humidity: 61% Winds from the VRB(VRB degs) at 6 mph. Pressure: 1001.8 millibars. Altimeter:29.58 inches of mercury. The prevailing visibility was 10 miles.