Around here, august would mean Melons, all kinds. Never can have too many.

I am in Zone 9, but we have cooler summers. It almost always is around the low 60's at night, give or take. I think my advice would be bad for you. You have to stay local in the Southern states to best understand vegetable gardening. In California, A popular gardening guide has developed a 24 zone system that we use more than USDA zones. I would try to get a growing calendar from somebody close to you. Maybe you will need shade cloth to grow best for market in Texas We might do more and better with shade and misting extending spring and make summer doable. I know some parts of Texas it's pretty much out of the question to grow even melons beyond early summer.

Anyway my area is Zone 9 and August is peak harvest. With enough water, tomatoes, peppers, eggplants, beans, zucchini, winter squash, cucumbers etc. keep on going to near first frost(Nov. 15) and possibly beyond with season extension.