The skittering of leaves as they blow down a city street, catching in the gutters and crunching underfoot.
Harvest decorations appearing on the front porches and fences of houses everywhere.
That certain smell that lingers in the air, of moist, rain-dampened earth combined with something that you just can't quite put your finger on.
Puddles in the street and stacks of firewood appearing along the outer walls of country houses.
Fall: when magic feels the most believable.