I keep most of my tanks in the garage. More than 50 of them. In the summer months the temp in the garage gets over 90 most of the time and very close to the 100s.
I don't use any chillers or air conditioning to lower the temp. The fish (Angels mostly) breed like crazy sometimes every 5 days. The other tropicals seems to have no problem with it either. I also keep Discus, Bettas, Guppies, Cichlas, and Arowanas. For a while, I also kept African Cichlids, Swordtails, and mollies in the same garage.
In the winter I use a space heater to raise the garage temp during the few days the outside temp falls below 60.
Heating your garage in the Winter in your State might make a big dent in the pocket book, though.
If you can do as Onikun suggests, you should be ok.