Long-sleeved onesie, socks, footie pjs, a bag sleeper (like a sleep sack with arms), and I cover her with a blanket when I go to bed.
In the 20s at night on a warm night. We heat with wood and her room is the furthest from the furnace. By morning, it is about 62 in the living room, 60 in her room. So she has to be nice and bundled to be warm by morning. :)