Can I Start a Balcony Garden in My Hot Climate?

I'm really eager to grow some vegetables but my only outdoor space is a balcony. I live in zone 6b, and my balcony faces south, so it gets a ton of intense sun and heat during the summer months. I'm aware it might be too late in the season, but I'm thinking about purchasing some seedlings to give it a shot anyway. Is there anything suitable that I can plant now? The temperature often exceeds 90°F in the summer, and it's even hotter on our balcony due to being on a higher floor, plus it's fully exposed to the elements. I say this because if I don't water my plants daily (or at least every other day), they tend to dry out and die quickly.