I hung a few weeks ago in temperatures very similar (maybe a degree or two warmer) with just a Big Agnes Air Core pad and was fine. In the scheme of things that's really not all that cold. I used my coat as some added padding around my shoulders and upper body and that seems to really help. I'm going out tonight and tomorrow as well and I've added a small (20" x 18") piece of Wal-Mart CCF in case my feet get cold, but that's more because of them slipping off the pad than anything.