Both are hardy, though you've not said precisely which cedar - the problem might be the risk of the pots freezing solid, so some insulation or a bit of shelter out doors might be sensible (like moving them near the house wall, wrapping or surrounding the pots with straw or polystyrene or bubblewrap or something). The ideal place is a cold frame or unheated greenhouse.

36º F shouldn't be a problem, though there is a risk of the pots freezing, as Bamboo says, when the temps get below 26º. Otherwise, the more cold weather they are exposed to now means the more hardened off they will be when serious cold arrives.

It is a sugar maple, at Bamboo. I think they are saplings, they are about 2 ft tall, each. Thereabouts.. how cold can they tolerate being outside?? An I have no cold frame or greenhouse, or shed, have been bringing them inside overnight.

Sugar maple (Acer saccharum) is hardy through USDA zones 3-8, and as far as I can tell , you're zone area is between 6 and 8, roughly, which means the tree is fully hardy there. However, in a pot, as already said, the risk is purely from the potting medium freezing solid, which will destroy the roots, so insulating the pot or removing to shelter when the weather is particularly cold is going to be necessary. These are, of course, fast growing trees, so its time in a pot should be very short so that it can grow as its meant to.

I never transplanted before, it shares a pot with a cedar, I think, some evergreen. It's about same size as the Maple, at Bamboo.

An my growing is 7B. At Bamboo.

Growing zone*

Doesn't change the information already given, except the plants need to be potted separately from one another - unless its desperate, with roots hanging out of the pot and with obvious poor growth, repotting is best left till Spring.

They are scheduled to be planted or repotted in Spring, at Bamboo. Q. How long does it take for Sugar Maples to start producing sap for syrup?? Out of curiosity.

It'll need to be in the ground for a start, or never would be the answer! But you know that already - the tree needs to be mature , around 10 inches in girth and 30-40 years old to use one tap and still have the tree survive well. Trying to do it earlier means the tree's health and survival would be compromised. Good thing I'm not growing one, I doubt I've enough life left to wait that long...