Fair enough as long as you aren't talking about the small sliver of coastline running along the western half of SF. A marathon is held there every summer. I r

Fair enough as long as you aren't talking about the small sliver of coastline running along the western half of SF. A marathon is held there every summer. I ran it once, on streets that were wet with fog, in a nice cool (mid 50's) mist. It was 80+ in Berkeley that day, and 90+ in Sonoma. When you drive up the peninsula along 280 on a hot summer day, you see an amazing wave of fog rolling over the mountains. You hit it, and within 5 minutes, you've turned the air conditioner off and the heater on. It's no exaggeration to say that 30-40 degree temperature changes are common over the span of about 3 miles. And on skyline, near the coast in pacifica, it actually feels hazardous to drive it's so hard to see.