Clear skies so a lot of radiation cooling. Already down to 11.5°F
My DANGER level is 18°F - that is where the pipe from the well to the house has the potential to freeze so I have a faucet running in the kitchen to keep things flowing.
That being said, we are warm and comfortable and it is a gorgeous night outside with the snow on the ground and the full moon in the sky. The critters are snug in the barn with a load of hay for them to eat.
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