Not customarily. And even in hot weather usually have a sheet over me from the waist down. Psychological I guess, doesn't feel like I'm in bed if I'm not partly covered.
When it's hot we sleep naked. When it's cold we wear some kind of jammies. When it's hot out and we're at our clothing optional camp we run around all day naked. If you've never done it you really should. Put it on the bucket list to go to a nudist/naturist camp at least once in your life so you can run around in nature as the natural creature you are. It's very freeing. Just don't forget the mosquito repellant!!
but i do sleep in my bra sometimes when its rly hot out and i dont have the air on
or when i'm out camping and its rly hot
even when it's just me myself and I... although I'd much rather have
someone sleeping naked with me.
;P