Last week it was high-90's and low 100's along the central coast (Santa Cruz & Monterey). It cooled down at night, but I also don't have A/C because I almost never need it, maybe for 3-5 days every 3-4 years it would be appreciated.
San Francisco is its own particularly bizarre climate compared to the rest of California or even the Bay Area. Just going from the tip of the peninsula to the South Bay can add +20F degrees to the temperature. It can be 75F in SF and 95F-105F in San Jose. Sometimes SF gets to 90F weather most years, specially downtown, even while the Outer Sunset is buried in fog by the next morning.
But last week had some parts hitting high 90's in most of the City, and it was 100F in The Castro and Corona Heights I am told. Very few residential buildings have A/C in SF. Not central air and not even a window unit. With mini-splits getting cheaper and easy to retrofit to old buildings, we're going to see more SF residence adopt A/C to deal with the hotter weather that has become more frequent.