The weather observed at SAN FRANCISCO, CA (KSFO) at 03:56 PM PDT was: The skies were mostly clear. Temperature: 64F ( 18C) Dewpoint: 52F ( 11C) Relative Humidity: 65% Winds from the WNW(290 degs) at 18 mph. Pressure: 1016.6 millibars. Altimeter:30.02 inches of mercury. The prevailing visibility was 10 miles.