They live in their coop, an octogon about 7 feet across. They do not come out. When they reach 8 weeks old they will be sent out to free-range with the rest of the flock, well those that aren't culled for dinner.
Given your low temperatures, your ducks aren't quite ready to live outside...
You should put your location in your profile so we can give you better advice.
Where I am in Ohio it would be no problem to put those ducks outside during the day, so long as they are protected from predators and other ducks. I have my three-week-olds living in an outdoor coop with an...