Imaginaryfriend’s post on keeping pets inside in the cold reminded me; this is a fairly low cost shelter you can easily construct if you have ferals/semi-ferals/strays who won’t come in. Put it in a spot that’s sheltered from the wind, particularly north and prevailing winds, and position the door on the sheltered side, facing a wall, for example. Optional addition a piece of plastic across the door that the cat can push aside.

It’s pretty wind and precipitation proof.