Cara Cara is a sport of Washington and so I would not expect that it would do much if any better in the high heat.

Trovita, thought to be a chance seedling of Washington and without a navel, is known for it's wider climate adaptability, especially desert areas. It is known to fruit heavily in Arizona and California deserts. Excellent flavor.

Shamouti may also be worth trying. It is a very important commercial variety in europe. It originated in Israel.

Of the Arizona Sweets that you mentioned, Marrs would be my choice, but I think you would be happier with one of the above.

Diller may be your best choice if you are after a juice orange.

If you have a blood orange in mind, Sanguinelli or Moro are the most likely to tolerate your heat.

Thanks to both of you for the suggestions. I don't believe I have ever seen a Temple orange tree in a nursery. It sounds like a nice variety though. I am waiting a few more weeks for the new stock of AZ grown trees to arrive at a local nursery before making my final choice. I either want a tangerine or an eating orange. I currently have Marsh Grapefruit and a Minneola tangelo trees.I barely have room for another tree. I would prefer to have a dwarf tree but my understanding is the rootstock isn't great for our alkaline soil that is full of caliche. I have seen a lot of dwarf trees with the flying dragon rootstock at nurseries though.

Temple is often planted as a pollinator for minneola tangelo. I also think it is one of the best eating "oranges." It is not often seen in the grocery. I used to eat them when I lived in the Indian River Florida area. I'd grow it here in z9a, but it is not one of the more cold hardy citrus.

I lost a Temple Orange tree this past summer and am looking for a replacement as I agree that this is a delicious orange and I am saddened by losing it. For me the search goes on to where I can find a Temple Tree

Are you in WI?? Harris Citrus has the Temple.. www.harriscitrus.com