Hussar
Legend
I have a summer tent and a 3 seasons tent. I've used old school canvas tents with no screens or bottoms. Heck, I've been tenting when a tornado touched down within a few miles. Twice. The D&D tent is made of canvas, not nylon. That means it's more like a 3 season tent.
But I stand by what I said. D&D isn't designed with the granularity were a few degrees will make a difference. If you need to survive freezing temperatures I'd expect characters to have winter gear, sleeping pad and blanket. They'll need either a tent or (depending on location) a survival check to build a snow shelter.
What winter gear? There’s none listed.
You keep ignoring the point though. Magic will always have this defined. Mundane never will. And this is why players will always default to magic solutions. They know what they’re getting.