...sorry...
I’m worried. I was here to post the exact same comment. It is a natural, I am ashamed to say. I kind of glad you beat me to it.
Was in Florida during that time. Never took off my New England windbreaker, flannel shirts, sweater, hat and gloves. Came back to Providence to warm up. 12 degrees at T F Green airport was MORE NATURAL than the 28 degrees at West Palm airport, and “felt” warmer.