Originally Posted by cthenn

You're absolutely right, summer in SF is usually Sept and Oct, it's the strength and duration that is not normal. For some reason I decided to ride yesterday at 1:30 and it got up to 105. Felt even hotter, and I had my worst reaction to heat I've had in quite a while, got dizzy and nauseated part way through. It felt like riding in an oven, the air was incredibly hot and dry. I've ridden in 100+ temps before and though it's not fun, this was borderline scary what happened yesterday. Definitely not going out in that kind of heat again any time soon.