The weather observed at SAN FRANCISCO, CA (KSFO) at 12:56 AM PDT was: The skies were mostly clear. Temperature: 63F ( 17C) Dewpoint: 58F ( 14C) Relative Humidity: 84% Winds from the NW (300 degs) at 8 mph. Pressure: 1015.9 millibars. Altimeter:30.00 inches of mercury. The prevailing visibility was 10 miles. The maximum temperature in the past 24 hours was 77F. The minimum temperature in the past 24 hours was 61F.