These neighborhood-specific environments are also why so many of our weather apps were so off last week amid the record-breaking heat wave that grasped the SF Bay Area.
San Franciscans are no strangers to microclimates. We love our fog; we bemoan wind gusts that fling our tote bags; we celebrate sunny days and stay weary of king tides. To the outside world (read: tourists and transients alike), carrying around a light jacket when weather forecasts put daily highs in the upper 80s seems like an albatross — a fit of bad decision-making. But we know better … most of the time.
October 6th was one of the rare occasions when we could have, indeed, left our rent-controlled apartments wearing proper summer attire and not tied a windbreaker around our waist.
In posts by the National Weather Service’s Bay Area Chapter, shared infographics and temperature maps have emphasized San Francisco’s different microclimates. Since temperature began soaring last week (and into this weekend’s record-breaking temperatures), temperature differences around 15 degrees have remained relatively common throughout much of San Francisco; 98-plus degree highs in the Mission District were contrasted by comparably balmy low 80-degree temperatures observed in the Outer Sunset and Outer Richmond districts.
On October 7th around noon, it was simultaneously 90 degrees at Dolores Park and 69 degrees along Ocean Bach — a 21-degree horizontal temperature swing across the span of just five miles.
Down the coast to Half Moon Bay and Santa Cruz, similar temperature swings were observed this past weekend, albeit extrapolated over much longer distances.
“While looking at the impressive daytime temperatures, how about the temperature gradient?!” reads a post on X from the weather service. “20-25° right along the immediate coast. SF, Santa Cruz, and Half Moon Bay.”
For us San Franciscans who live in the hotter corridors of the city, next time we’re struggling to mop or browse … maybe we’ll hop on the N Judah line until we need a light sweater.
Feature image: Courtesy of David Yu via Flickr
