Summer is 110+. Maybe December and January are nice. Almost the whole year is hot.
http://phoenixrealestateguy.com/wp-content/uploads/2015/06/phoenix-temp-chart-f1.png
3 months with average highs over 100. Probably closer to 4. So 110 is not at all uncommon and it gets hotter than that.
Even Texas is a better bet. Or maybe Nevada if you go up north a bit.
Boise has lots of sunshine and constituional carry.
There's better parts in Arizona if you want Arizona, though.
I lived in Texas for 5 years and I would pick it hands down again over Phoenix.
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