They would look pretty bad if they traded for a kicker and then that kicker cannot make field goals for whatever reason (weather, distance, etc.) It is good to have another option that you can track progress with. If he doesn't look great they can remove him from the practice squad with very little loss.
My question is, do the kickers actually kick out in the weather in Cleveland other than during games or during warmups? Is there an outdoor field at the practice facility? If I were the special teams coach I would have my two kickers kicking in the stadium in the actual weather conditions that they would face in a game whenever possible.