Both of these dresses look great on you and excellent for hot weather. I understand that the full skirt of #1 might feel retro and girly for your overall style...but the muted palette and the shirt style bodice steer it more in your usual style direction, and that type of bodice suits your body type extremely well. The other dress looks really cool. And in my mind, there is nothing more stylish than looking cool on a really hot day!
If you do belts at all, you might try a belt on either of these to tone in (or contrast) with footwear. I don't know if that self tie is removable (or possible to disguise) on the second one.
I feel similarly about accessories in the heat. For summer I really love my Nickel and Suede leather earrings and cuffs (although I stopped wearing the cuffs much now that I wear a watch almost daily.) They are lightweight and don't feel hot or sticky. The cuffs would be baby proof (not the earrings, since those dangle).
Another idea is to vary your bag to add something to the outfit.
It's good to hang onto a few outfits for extreme weather conditions (on either end) even if one lives in a mostly temperate climate. Because with climate change, we never know.