I had a June baby last year, and this worked well for us.
Some soups (yes, I know it's hot, but they are very nourishing and filling for me, so I didn't mind). I especially liked tortilla soup, gumbo, brunswick stew, and Italian wedding soup.
Hamburger patties (to be made into salisbury steak with brown gravy) and frozen mashed potatoes (make them on the stiffer side, individiually freeze in ice cream scoop size on a tray, then store in a ziploc bag). I serve this meal with another veggie, either fresh or frozen (depends on how old the baby is. )
Taco meat and refried beans. Easy to get supper on the table with this one. You can also freeze shredded cheese and flour tortillas so that you have it on hand.
Red beans with andouille, onions, celery, bell pepper. Make the rice fresh.
Pintos. Again, make the rice fresh. We usually eat these with salsa, cheese, and sour cream.
Black beans. I serve this with a meaty red sauce (1 lb ground beef to 1-2 cans tomatoes; season liberally), which can be frozen. Make the rice fresh. (my family loves beans and rice...obviously)
Don't discount the convenience of having easy stuff frozen, too. It'll save you when you are so tired or the baby is fussy or your bigger needs a little attention. For us, that was muffins, pancakes, waffles, cheese quesadillas, bean and cheese burritos, and hummus (I didn't like the hummus thawed, but my dh and children did; ymmv).
Sloppy joes. I buy the buns fresh, then serve with frozen fries and fruit.
Chili. Reheat and serve over baked potatoes, and it's feels like it's a lighter meal for summer.
Like PP said, marinated chicken, pork chops, whatever.
One thing that we really liked was a pre-cooked pork butt. Dh did this on the grill, and he actually did 2 of them, which is a LOT of meat, and it was great. I froze in meal size packages. I used this for tacos/burritos, on top of salads, just thawed and served w/ bbq sauce, on top of baked potatoes. I found lots of uses.
Chicken tettrazini. This is my favorite casserole, so I made an exception to the no-casseroles-in-June rule. :smile
Chana masala. Make the rice fresh.
Savannah red rice (like jambalaya) with sausage and chicken.
Enchiladas. Another casserole, but if it's not too hot to use your oven, it's a good one to freeze.
Italian beef for sandwiches (it is slow cooked with a jar of pepperocini, a package of good seasons dry salad dressing, and beef broth).
the cheese sauce for macaroni and cheese. Make the pasta fresh.