What is the coldest temp a chicken can survive alone?

Answer 1

Mine have survived temperatures of -30C ( -22F ). Dry shelter is important. If the bird is alone that temp may be too low and things will freeze. Wattle and comb freeze first, feet are next unless the bird stays in the straw hunkered down. The addition of a single 100 watt light bulb on an extension cord would make a big difference.