When the polar vortex strikes, you realize we don't have enough words to describe extreme cold. Well, nothing you can say within a block of a church, anyway. All we have is "bitter."
That's a flavor, or an emotion. No one ever says, "The way my friend of many years stabbed me in the back leaves me feeling like I have to put my feet in a pot of hot water."
We don't have many colorful phrases to describe the cold. We're pretty much stuck with: "Cold as a witch's mammary gland," which really wouldn't be colder than anyone else's and was described as such to otherize a non-patriarchal belief system.
Let's run this through the Euphemism Machine. Here are some other suggested figures of speech for vortex season:
"Cold as an IRS letter."
"Cold as a dog's nose in a meat locker."
"Cold as Lenin's dental fillings."
"Cold as a penguin's keister."