The weather we are having in large portions of this country is not normal. Domestic animals are not equipped to get through it without help. Get a thermometer, but, really, better is to bundle yourself up properly, and check on the animals frequently. You can see if they are shivering (some do), hunched up, stiff-legged or lethargic. You can see if their water is frozen, if they have enough feed, if there is a breeze getting into their shelter, and you can do something about that.
Please do not let yourself get overwhelmed to the point of just hoping and praying they will be okay without your help. If you need help, please ask for it. Do something socially unacceptable, like bringing the chickens or goats into the utility room overnight if that is what it takes. Forgive me, but dead is dead. Hypothermia is deadly and frostbite is painful and both are frightening.