I was told it's rated for winter. I believe that was an accurate description so long as it's zipped up all the way.

[ He's been careful of that and has spent warmer nights than his first round of being human. He's rather proud of himself. He failed miserably the last time, but he learned from his past mistakes. This time around, he made it his priority to find food and shelter. Made sure not to get sick. Hence why Dean's lecture mode doesn't sit well with him. ]

Dean, I'm not out in cold. I have a sleeping bag.