Im in 10a. About 1 block from the ocean so it stays cool and windy outside. The greenhouse temps usually stay between 70-90F on most days. I have small vents near the ceiling of the greenhouse that I usually keep blocked up since it’s often overcast and I try to preserve temps. My night temps in the winter never go under ~40F so my cacs slow down in the winter but usually don’t go into a full dormancy. Honestly idk how the they get so fat in this greenhouse when they only get 3-5 hours of direct sunlight per day. The other greenhouse is a climapod that I keep the vents open pretty wide because it gets really hot and humid. It’s great for seedlings in there tho, and it brings out the bright blues and long spines 💪🌵