Vegas summers are brutal no doubt. There is a fair amount of hiking and climbing in the Spring Mountains though, that's generally nice in the summer. But in town the heat just never lets up for several months. It's not uncommon for it to be 95+ degrees hours after sunset.

Personally, I probably wouldn't live in Vegas. I'd live somewhere at a higher altitude in that area of the country. But a lot of people equate Vegas with The Strip which isn't really fair.