The weather observed at WASHINGTON DC, VA (KDCA) at 12:52 PM EST was: The skies were mostly clear. Temperature: 39F ( 4C) Dewpoint: 6F (-14C) Relative Humidity: 25% Winds from the NW (320 degs) at 13 mph. Pressure: 1031.5 millibars. Altimeter:30.46 inches of mercury. The prevailing visibility was 10 miles. The maximum temperature in the past 6 hours was 39F. The minimum temperature in the past 6 hours was 31F.