We will be there in mid July too. We always go in the summer because of the kids schedules. Tons of CS places have indoor seating. All of the parks have choices that do. If you know where you want to eat, someone here can let you know if they have indoor seating.
Epcot:
Liberty Inn
Not sure about the new CS in Mexico -
Tangierine Cafe - but if i remember correctly the doors are kept open so not much AC.
Yakitori House - not sure about this one either -
Sunshine Seasons
MK
Columbia Harbour House
Pecos Bills
Cosmic Rays
Pinocchio Village Haus