If not completed in August, bees should be fed and treated for varroa. All the honey you intend to remove should have been taken off. Hefting the hive at this point will give you a reference point for hefting throughout the winter. (It should be difficult to lift one side at this point).
Prepare colonies for the coming months
Mouse guards need to be in place before the first frosts. An entrance block will keep mice out as long as any gap is smaller than the width of a pencil. Make sure hives are free from damp, with good ventilation below. If you have problems with Picus viridis (the green woodpecker), now is the time to put your defences in place. On an exposed site you may wish to place a weight on the roof to prevent wind damage.