Yes Mike they may be cold if all puffed up. You can do as pepper said and cover the sides of the cage if it is drafty on that side. Better yet put them in the room that does not get as cool as the others or put them in a room that you can close the air conditioner vent and keep the room warmer.
I have Bob in the room with AC but far away from the vent and I only keep my thermostat at 79 degrees, just to keep it comfortable. But I will not shut it off...going to almost 100 today!