it will be fine. My south Louisiana chickens have always stayed out of coop during daylight hours no matter how hot and humid it is outside unless it's storming, which will instantly cool a hot coop. My coops have a ton of ventilation but my chickens Wana run around and eat grass, and bugs
Sorry but that's a strong sign the coop is too hot.
My Florida chickens seek the open air, shaded coop for shelter from the heat when days are hot.
The shed coop we have with merely adequate ventilation (you would think it's a lot) also shaded, they don't shelter in there but go off and find other shade in the yard.
Chickens will show you what's comfortable, you just have to listen.