The desert southwest is very hot during the summer. Yes, it is a dry heat. But if it's 110 degrees F, I don't care if it's dry. That said, a lot of people are fine with Vegas, Phoenix, and so forth. They don't get a lot of bad weather (aside from the summer heat), they can play golf year round, and they just tend to stay somewhere air conditioned during the middle of the day. Not my thing but it is for a lot of people. (And while I don't like Vegas, there are lots of nice locations relatively nearby during the cooler parts of the year.)