Bunny I thought as you do now before deciding where to relocate. There isn't enough money in the world to compel me to live in Texas 114 degrees in the shade or upper elevations of great divide no matter how majestic the view. I started out with a hardiness zone map because I really have no tolerance for extreme weather anymore and charleston fit me fine that way. Not too hot, not too cold, goldilocks porridge is just right LOL.
National Arboretum - USDA Plant Hardiness Zone Map
The more specific info is likely in 7ths links. Good luck finding your eden.