In Autumn the day light gets shorter and evenings become cooler. The plants drop their leaves and animals prepare for the cold winter ahead. In the Northern Hemisphere autumn comes in the September, October and November months and in the Southern Hemisphere it comes in the March, April and May months. Autumn comes about by the Earth decreasing its axis tilt relative to the sun decreasing the temperatures (less direct sunlight) and the shortening of the days.
More information on Autumn. (Details on Northern and Southern Hemisphere for Autumn)
Days till Autumn 2013
There are -1521 days until the start of Autumn 2013.