Sep 26, 2016 - 03:40 AM
Placing ant baits indoors won't work either, because ants, especially carpenter ants will horde their food and also minimize their colony size for overwintering. They don't go dormant, they don't hibernate, they just go into a period of very low activity, they have their own food sources within the nest and they don't need to leave to find more until the spring arrives.
Unless you know exactly where the ant nest is located and treat it first hand using a residual insecticide, there really isn't much you can do when the temps fall below 60f. If it's early fall, then you still may have a few weeks left to get control by placing the baits outdoors.