Check out Maricopa county monthly tips.

If you are just getting started, you can plant  
Vegetables

Plant Seeds
Beans (Pinto& Snap), Corn, Armenian Cucumbers, Melons (Cantaloupe, Muskmelon), Pumpkins, Winter Squash, Sunflowers
Plant Transplants
Peppers, Tomatoes
Place shade cloth over tomatoes.

It is that time of year that all I do in the garden is  zip outside and pick tomatoes, pepper, beets, basil, kale, cucumbers or zuchinni for supper and RUN back inside. Whew.
The rest of the time I check on the spaghetti squash, eggplant and sweet potatoes from the window. "Yup, still green. Good to go."