Close to the supply, expect colder temps and higher %RH. Every degree cooler the temp is expect a +2%RH increase per degree drop in temp.
Ideal is 73-75^F, 50%RH, A properly set up a/c should be able to deliver this during high cooling loads. As the cooling load declines, supplemental dehumidification is required to maintain 50%RH.
Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
Use +Merv 10 air filter. -Don't forget the "Golden Rule"