Rain, perhaps later on snow. Last fall's low was 24 degrees on 4 November. 36 on 22 September and 28 on 27 October. It seems less crowded. Boats come out of the water.
Vacation time is used up.
Cottages are shuttered and winterized. Flannel shirts get worn. Usually the fall flannel collection debut is on a day of NE wind. You've got your fall series in sailing and your Fall Classic in baseball. This fall seems to be off to a start in providing variety.