I'm about the opposite. Too hot down there for me. I do remember some frost while I was there. And some snow. The blizzard of '98. Got about 1 1/2". They had to cancel the golf tournament out at TPC in Scottsdale.
So, where in Phoenix are you going to be? My mother-in-law is in Scottsdale, and I have a brother in Mesa.
Looks like the wife and I will probably be down there in October (I think), she has her 10 year class reunion to go to.
Good luck on your move, keep in touch.