I live in Hawaii and, contrary to popular belief, it does get cold here. Maybe not freezing and snow on the ground cold, but when it's in the fifties and your windows don't close, the wind blows through your dozens of only-screen windows and all you have is t-shirts and shorts to wear, you definitely end up huddling under the covers and shivering at night. :)
It has been pretty cold the last few nights and I have a 2 week old. I've been putting him in footies with socks and then putting him in a fleece sleepsack with a hat and he's still cold. He can't sleep at all when he's chilly. Last night it was really cold and I put him under my down blanket with me. Even with all that, he kept waking up with his hands cold as ice. I lay him with his lower body against me and his head and chest three inches away or so. I tucked the blanket behind me and wore it at breast-level, then spread it over baby under his arms, put his arms over the blanket and tucked the end of it under him on his other side. I slept with my hand on his chest as an added precaution against the blanket somehow making its way up to his face (though I had it tucked in nice and tight, so I don't know how it could. I'm still a paranoid mama at this stage.)
Is there a safer way to keep him warm? We can't have any kind of heater because the windows don't close so we couldn't hold the heat in the room even if we could afford to run a heater, which we can't.
Have you ever had to keep a newborn warm in a cold room and how did you do it?
ETA: And how on EARTH do you keep a hat on them? I've tried dozens and he just rubs them right off. I know he loses a lot of heat through his little head at night. I'm scared he'll be strangled if I put one of those on him that ties under the chin.