The lows this week in Flagstaff are running between 3 and 8 degrees above. You have to call ahead to RV parks so they can plow a space for you.
Flag averages just over a hundred inches of snow per year, much more at higher elevations. There's a ski resort just outside of town and another ski run about 30 miles away in Williams. I've worked many, many times in sub zero weather across No AZ. Like he said, AZ has a wide variety of terrain.
Where are you at? We should get together and drink some beer and talk about how cool blue stuff is... ha! Flagstaff is essentially where I'm at.