Weather in San Francisco is a love/hate relationship. This website might help a bit. At Weather Underground you can find current weather data from various “unofficial weather” stations around SF and the Bay Area. It seems to us to be more accurate than Weather.com or SFGate, because those sites just pull the data from one of the “official” sites, like from SFO, and they don’t account for the micro-climates found in our lovely city.
Enjoy your weekend!