Animal Kingdom is a glorified zoo. There is little to no opportunity to interact with any of the animals. There is a bird show where they will fly over your head and one or 2 people interact with them, but otherwise all of the animals are behind glass, cages, or some kind of other creative barrier designed to keep them from getting too close to the guests.
If it is hot out the animals are out, but they are usually in the shadowy, harder to see areas because they are trying to get out of the sun. When it's super hot out it is better to do AK in the morning before the sun is really hot, more chance the animals will be out and about.