I always cover mine but I’ve got a friend in Illinois who never covers his.
He claims that as long as there is no hose hooked up, you won’t have a problem.
I can kinda see that if the faucet is connected to a heated building.
I always have covers on hand for my faucets and I gave my daughter some last year but she can’t find them.
I checked 2 HDs and 2 Lowe’s yesterday.
None in stock.
Let me know if anybody knows of a store that has them.
I use the square styrofoam things with the rubber that hooks over the faucet turn handle. Less than a buck each at Lowe's.
Frank . . . . colder in C'view aint it. --- SAWMAN