It would be hard to recommend Western NC right now as I type this we have 6" of snow and it's still snowing. We expect another heavy snow on Monday. To be honest, I have a friend from Maine here and he wouldn't want to be any further south. If you are retired, you can travel during the couple months of winter if you want.
But if low humidity and mild temps are what you want, check out SoCal (as long as you can afford to retire there). Though small city it isn't.