We need to know how hot is hot (for you) and at what elevation you'll be camping.

I've camped in one spot (Inks Lake, TX) where it was 92F at 10pm with 60% humidity. I slept in my shorts & t-shirt in my hammock and tolerated the night. My ground dwelling, tent using friends sweltered. About 4am, ended up pulling up a fleece blanket and slept fine.
_________________________
If you think you can, you can. If you think you can't, you can't. Either way, you're right.