I'm pretty confident that 40ish percent of SF's economy rides on selling embroidered fleece sweaters to tourists deceived by our palm trees. Even with the recent slightly-hot-spell, we all know that drastic temperature change can happen in mere blocks, and certainly once the sun goes down.

Illustrator Vi Lam put together this guide on how to dress for a summer day in various parts of SF. Tell your visiting friends!

Illustration by Vi Lam