Equivalently, being outside during the day in areas hotter than Palo Alto is ludicrously taxing in pretty much every way.

The Bay is very kind to Homo sapiens, in terms of climate.

[Atlanta native here] Tell me about it, and don't forget to mention the humidity--a factor 5x more important than temperature per se, in my eyes. If I had to be in the hot sun, I'd take 100F in Phoenix over even 70F in Atlanta _any_ day.