60% average humidity too high?

I currently have 4 autos in my 2x4 tent with two oscillating fans, my ac infinity t4 inline fan, and electric sky led. I've been struggling with the michigan weather to maintain my humidity below 60%. I have a ac unit as well in the room it resides in but cant manage to stay below 60. I know they say its good to be around 45%-65%. Any suggestions or advice? Could this high of humidity cause any potential issues?🤔