Related Programs: Hey Area: You ask, we answer. Crosscurrents Hey Area: Why are Bay Area heatwaves often in the fall? By Jürgen Klemm • May 22, 2017 Related Programs: Hey Area: You ask, we answer. Crosscurrents TweetShareGoogle+Email "Golden Gate Fog" by Flickr user Mark Fischer. Used under CC BY-SA 2.0. Cropped. Listen Listening... / 2:00 In the Bay Area, summer weather usually begins in the fall. Why is that? In this short-answer segment, San Francisco State meteorology professor Oswaldo Garcia explains our "peculiar" climate. Got a question for Hey Area? Ask it below. _ Tags: Bay AreaWeatherSummerFallSan FranciscoTweetShareGoogle+EmailView the discussion thread.