If you search back through previous posts, there was a thread from someone in Arizona growing a JM. Maybe early summer? At any rate, they were experiencing some difficulties but the tree was container grown and as I recall, that had some impact.

Regardless, you will need to site in as much shade as possible and be attentive to both soil and watering conditions (SW'ern US soils and water tend to be on the alkaline side). And search the archives of this forum or Goggle for JM selections most suited to hot, dry conditions. Some cultivars will work better than others.

You may have better luck with shantung maple if you give it some deep watering every once in a while.

You might want to try "Kamagata" (a slow growing but vigorous dwarf) I have one and this little tree is such a trooper. It takes every thing I can throw at it...cold, heat, sun, drought. I have several JMs that I am experimenting with and Kamagata is the only one that never has any leaf scorch or looks thirsty or shows any sign of distress. And this tree is doing so well in only the first season of growth!! (planted last fall). I really like this tree and think it will only get better. It is so low maintenance.