High humidity indoors can mean the AC is undersized, dirty, or not running long enough

https://localairconditioningcooling083.talesignal.com/posts/ac-not-working-in-winter-haven-choose-a-trusted-local-hvac-technician

High humidity indoors can mean the AC is undersized, dirty, or not running long enough. Clean the filter and coils, then have a technician assess system performance.