St George would be your only option, 2hrs away. Still gets 100+ but it’s 5-7 degrees cooler than Vegas usually.

Push it to 2.5 hours and you can live in the hills above St. George. Anywhere from 4000 to 6500ft elevation, so nice and cool and only 15-30min from town depending on where you’re at.

Commute to Vegas isn’t bad, all freeway and traffic is pretty non-existent unless there’s construction.