Lawn growth slows and eventually stops with the onset of shorter days and cooler temperatures of fall. It is said that we should leave the leaves, but a heavy mat of leaves should never be allowed to accumulate on the lawn. I continue to mow my lawn weekly at this time of year for leaf maintenance.
Leaf litter in early November is light, so I mow the leaves (without bagging) and the shredded leaves are left to improve the lawn soil. Later in the season, when leaf accumulation is heavy, I mow and bag the leaves and spread them lightly over garden beds.