Yes, you understand perfectly. Your weather is worse than ours except in the dead of winter where we could have a similar problem. Our garage isn't heated so it would almost be as cold in as out anyway - not much fun to hit when it's that cold. Best easy solution I could offer is to use the Bow Net or Jugs net and position it in a place where it would not extend and strike what's behind it when you hit into the net solidly with the garage door closed.