There are lots of times it wouldn't be enough for me to be comfortable without a puffy and a hat. If you have a decent pad, its a decent bag, and you don't mind bundling up if you need you should be fine. I sleep a little cold, plus depending on where and how high, the nighttime temps certainly can be below 25 (could also be 50!) out here. If you have a decent base layer, puffy, and hat to put on if needed you should get by even if the temps drop into the low 20's.