The weather observed at SAN FRANCISCO, CA (KSFO) at 04:56 AM PDT was: The skies were partly cloudy. Temperature: 61F ( 16C) Dewpoint: 58F ( 14C) Relative Humidity: 90% Winds from the WNW(290 degs) at 14 mph. Pressure: 1016.4 millibars. Altimeter:30.02 inches of mercury. The prevailing visibility was 10 miles. The maximum temperature in the past 6 hours was 65F. The minimum temperature in the past 6 hours was 61F.