Surface observations

Data from the National Weather Service, made available here by the UAlbany Department of Earth and Atmospheric Sciences

The weather observed at SAN FRANCISCO, CA (KSFO) at 01:56 AM PST was:
  The skies were mostly cloudy.
  Temperature: 63F ( 17C)  Dewpoint:  58F ( 14C)  Relative Humidity:  84%
  Winds from the WNW(290 degs) at  7 mph.
  Pressure: 1017.3 millibars.  Altimeter:30.04 inches of mercury.
  The prevailing visibility was 10 miles.