Today (Wed, 2/21) marks the 27th consecutive winter day that San Francisco has NOT had measurable rainfall this season. (The last day of rain in the City was January 25th.) This makes it the 13th longest winter dry spell beginning in December, January or February over San Francisco's 169 season history.
Probably the first real "chance" of rain is next Monday, which would make the streak 31 days and tied for the 5th longest.
Jan Null, CCM
Certified Consulting Meteorologist
Golden Gate Weather Services
Phone: (408) 379-7500