I assume your house windows are closed and your heating systems are running inside the house?it’s 51 outside with 87% humidity. It’s 68 in my house with 76% humidity. My coop is 53 with 81%. So there’s actually less humidity in the coop - weird. But I guess as long the humidity stays consistent with outside I’m ok - right?
The temps and humidity between outside and inside the coop will shift thru the day/night,
but what you show there looks good ventilation wise.
It's 'natural', won't hurt them....and sometimes pullets will lay all winter without lights.but I’m wondering if it’s good to let them just barely start laying eggs just to stop for the winter or for some of them to not even start until spring.
If you do add light, best to do it where their feed/water is.
Here's how to add your general geographical location to your profile.I live in Bangor, Maine
It's easy to do, and then it's always there!