The weather is gorgeous when it's not raining. The San Francisco Chronicle posted this article on autumn cycling in the San Francisco Bay Area:

"October is as good as it gets around here," said Bill Martin, the KTVU meteorologist who is an avid road and mountain biker. "The temperatures haven't gotten cold yet, and during the day you don't get the big heat. There's no fog on the coast, so winds aren't an issue like they are in summer. The climatology of fall in the Bay Area is great. It's my time to be alive."