My dad went to work in 1 degree weather one night and he ended up with a chest and head cold. He's sniffling and coughing. Is this just a cold?

Cold. Probably a minor viral infection and will probably respond to the usual OTC products. If it does not he needs to see a doctor.
Evaluation. I am assuming since you are 34years of age,your dad must be over 50years. He needs to get checked out by his physician. Even if he had a cold at first, other co-morbid conditions could predispose him to having a bacterial complication once his immunity is down. Let's get him to his doctor and make sure he gets some rest.Hope your dad feels better.