The weather observed at SAN FRANCISCO, CA (KSFO) at 02:56 AM PDT was: The skies were mostly cloudy. Temperature: 55F ( 13C) Dewpoint: 52F ( 11C) Relative Humidity: 88% Winds from the W (270 degs) at 17 mph. Pressure: 1019.2 millibars. Altimeter:30.10 inches of mercury. The prevailing visibility was 10 miles. The weather observed at SAN FRANCISCO, CA (KSFO) at 03:26 AM PDT was: The skies were cloudy. Temperature: 55F ( 13C) Dewpoint: 52F ( 11C) Relative Humidity: 88% Winds from the W (270 degs) at 15 mph. Altimeter:30.10 inches of mercury. The prevailing visibility was 10 miles.