First, as all the other respondents have pointed out, your characterization of San Francisco as "straight lines and 365 days of sun" is way, way off. But more importantly, as a consumer, I'd be thrilled to own an autonomous vehicle even if it didn't work in bad weather. There's easily enough data to have a car say "there is a storm coming in your area, can't drive autonomously" long before it would become a safety issue.
And, of course, wouldn't one expect an autonomous vehicle to start in places with better conditions vs yolo'ing it in a blizzard whiteout?