Humidity control in Summer

Ok so I'm 2 weeks into the flip and my humidity ranges 58 to 65%.
I know I need to get that down to 45-50% until ripening then around 40%

I changed my venting due to growing in the summer in the Mid Atlantic USA
First time growing in the summer here. Its been raining like every 2 or 3 days.

So I vent out a window and i have an active intake AC Infinity fan and 1 open passive vent on the tent.
I also have a box fan blowing A/C air from the living room into the room to cool the air down in there.

I have a decent size dehumidifier but I am trying to figure out one thing.
How do I dehumidify the air to keep it down in the tent if I am venting the heat outside a window and its sucking in fresh air from outside thats around 60ish humidity?

Do I need to get a humidity controller for the dehumidifier and set it to always on so the controller can turn it on and off?

Last time I vented into the room and used an A/C combined with the dehumidifier with the door closed
But I like the idea that its bringing fresh air into the house which means fresh CO2.

Most dehumidifiers that have a humidistat seem to adjust humidity in 5 degree increments which is too wide for me. I’ve had good luck setting my dehumidifier on continuous and plugging it into an inkbird controller which allows for more granular humidity control. I’m in early flower now and have both a humidifier and dehumidifier plugged into the inkbird. I’ve been managing to keep the humidity within a couple degree range most of the time.

I’m also exactly 2 weeks into flip fwiw, and I prefer my humidity higher. Right now my humidity is running in that 59 range with temps around 78-80. Super dry air early is going to create high VPD which is undesirable unless you drop your room temperatures which inhibits photosynthesis.

As flower moves along and the buds get denser I’ll drop that humidity a bit but I don’t feel the need to be 50 or under until late in flower. That of course assumes you have good air circulation. I’ve got 2 tornado fans and a tower fan which I feel is enough to avoid heavy pockets of humidity. I started out keeping my humidity at that 50 range as soon as I flipped, but my yields have been much better letting it run a bit higher.

YMMV. Good luck.