The thought of bringing new plants into the garden in this heat, just seems wrong. Nevertheless, there are fruits and vegetables that can be planted in July.
Basil, Oregano, Thyme (from seed or transplants)
Tomatoes (I think the Cherry varieties withstand our heat much better than others)
Peppers (all kinds)
From Seed all month:
Pumpkins (Rule of thumb is plant on July 4th for Halloween pumpkins)
Chard, corn, cucumber, okra, black-eyed peas, New Zealand Spinach (Malabar spinach), summer and winter squash, watermelon, eggplant
beans, cantaloupe, carrots, cauliflower, fennel, rutabaga
I have several varieties of tomato plants that still look quite healthy, although they’ve stopped setting fruit. I am weighing whether it is worth the time and water, to keep them healthy until Fall, or replant when the weather is cooler. I haven’t decided, but probably will try to save at least a few that did well in the Spring.