My auto season wasnt a great one but i still pulled 2oz on the average per plant....not bad considering the crazy wet dark season we had(35 of the first 45 days was rainy!) My outdoor photos are getting to be monsters...take a look if you have some spare time!
https://www.autoflower.org/threads/...f-photos-and-autos.58824/page-67#post-1544994
Mid 30's isnt that bad...theres a few desert growers on this site that deal with really high heat, some that do very well. The problem isnt overheating the plants, its overheating the roots that can become a serious issue.
Plants can handle some rain....rain isnt even the problem as much as the average relative humidity...here we get very high relative humidity in the air, usually 70%, some years its 80%. Even on drought seasons where we get almost no rain for 2 months i deal with mold on some plants due to the high humidity in the air. You should have a very low RH, so mold shouldn't be an issue.
That sounds like an ideal climate!!