Is the train air conditioned and/or heated?
Yes, all Cincinnati Dinner Train cars have a climate controlled environment with the exception of the party bar car which only has heat. However, during warm weather the side doors of that car are open allowing both viewing and air flow in the car. Please keep in mind that the dining cars are over 60+ years old, and regulating the temperature to an exact degree is difficult. Cars tend to be more cool than hot, so if you are cold natured, you will want to dress accordingly.
