Hello microclimates!

San Francisco - heck, the Bay Area, is filled with microclimates. Unlike the Midwest, where you can have the same weather for a 200 mile radius - you can go from sunny and 80s to foggy and 50s in about 50 miles (that would be Sunnyvale to San Francisco). Or - like yesterday, 80s and sunny in San Francisco and foggy and cooler in Santa Cruz (75 miles).

We've got effing nanoclimates here in The City. A 7x7 mile area - 49 square miles - complete with sun, fog, wind, cold and hot... simultaneously.

Here's a map that helps to show some of these nanoclimates - the yellow circles are pockets of warmth, the blue arrows are wind and the white line is the "fog line"
I grabbed that image from The Front Steps, a real estate blog. Pretty great site. If I had any money to buy a house (read: condo, shack, cardboard box) in the city, this blog would totally make it to my Google Reader.
Link to the full post.