Nowhere near enough to worry about. In the warmer months, the two side windows and the upper monitor windows are opened up, and the door is usually hooked open. During summer rain storms, some rain may blow in, but not enough to flood the place. The screening seems to block most of it. So any resulting dampness, doesn't really matter, as the coop drys out quick, with all that air flowing through.
We brood chicks in the garage where we can control the temperatures (4x5 ft. area). In the wild, hens know instinctively how much warmth to give. Without a mother, the chicks will need your help! The first week chicks need 90 deg (F) second 85 third 80 fourth 75 and the fifth week 70 degrees. We incorporate chicks into the coop after the 6th week. If the night temps get below 50 degrees then we add a brooder lamp in their area. We isolate them from the full grown chickens for another few weeks before they can run with the flock. Hope this helps!
Breaks my heart, 'the audacity of God and some of His ideas for 'the animal kingdom'.
