Well its all relative. First of all there is plenty of nice housing in the area around Luke. Right now is a good time to buy since Phx hit rock bottom. As far as the heat its different. In the moring it will be under 100 but not cooler then 90 usually. Here is how they gauge temps,
Hot:111+
Warm: 95-110
Everything else isn't bad. It hits the 90's usually in April. If you rent or buy a house make sure it has a pool. Phx is an awesome town and has lots of things to do. Also make sure you don't have to use the 10 to commute or at least very far. The traffic is terrible.