Actually, while you meant to be sarcastic, there's a reasonable chance that temperature increases will result in more rainfall for Arizona.

Historically, the Sierras have prevented moisture from reaching us, but as the air gets warmer, more moisture makes it over the mountains.

At the same time, the Yuma low, which is a static low pressure system, is getting bigger, and deflects the Jet stream farther south.

This means that colder air is hitting the increased moisture from the coast, causing greater precipitation.

It will take a while to see where it all settles out, but this later-season increase may be a new normal.