That’s not too hot. In June, we were in the 100s daily for a couple weeks and our chickens just panted and laid in there with it. Lots of fresh water, no a/c.I have some fake eggs sitting in the nests already. I'm thinking the coop may just not be cool enough for them; the inside gets pretty hot during the daytime. When the temps get above 85 they get an AC put in, but the highest it's reached here this week is 83.