A/C units are sized depending on area, insulation, windows, and climate. If it is over sized it will cool the house too quickly and not run long enough to bring the humidity down. That would result in a damp, cool house. A properly sized unit will tend to run a lot, sometimes almost constantly, during the hottest months here.
It also depends on the temp you desire. Most of us feel heat and cold differently. (My spouse and I have a one degree differential.) If you can tolerate a degree or two warmer your A/C will run less.
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