If you do not have a car and plan on using Disney transportation, then I would focus on the resorts with Air Conditioned interior hallways. It makes the walk back to the room alot more comfortable. Some of the buildings at SSR and OKW can be a hike in the hot sun, or during a thunderstorm.
If you do have a car, then it is the exact opposite, as you can park steps from your room at those two resorts.
AKL Kidani is the best of both worlds as there is shaded parking under the building and interior halls.
Either way, summer can be hell.