Mt Whitney Zone Forums General Discussion Tent Fly = Warmer?

I bring a thermometer on every trip and often check it at night when I am not sleeping. I have found that it is much warmer inside my tent (as much as 10 degrees warmer), even though I use a tent with ultralight materials (either BA Fly Creek or BA Seedhouse). I do think the double wall makes a difference. Both my tents have a lot of mesh, while the fly is solid material, so that may factor in. The other factor -- my tents are very small volume...so easier to warm up.