Blue Heeler Cold weather

My boy almost 4 years old and he stays outside. We live in north GA and it’s suppose to get to at least 9 degrees tonight and the wind chill in the negatives. My boy has a dog house with blankets in it. Will he be okay or do I need to bring him on the house? Or could I get him a self warning pillow for his little house?
Also he isn’t out in the open. His doghouse in under our covered porch.