Its the rain we all are getting, my exhaust fans were at 100% in both tents and they can't get the humidity out because the whole house is 60-65% RH. i suggest a really good dehumidifier, the $100-200 units, you can find them used on facebook market or other used markets.
I had the same problem and i had to end flower with 60%+ and drying the plants at that humidity takes forever. i would say with enough air flow you should be fine, i didn't have any mold or issues other than a very long dry time.