Good advice about checking out the weather in the most extreme time of the year!
There is a very good senior "mobile" park just outside city limits of Tucson..
http://www.rinconcountry.com/west-park/home/.. rent a unit there in SUMMER to see how you take the weather. The activity schedule the rest of the year is just excellent in my opinion..we rent there during winter months and we are also from Illinois. It is a quiet and friendly place with lots of park models to rent or to buy if you decide to do that.