September is the "tug-of-war" month. In many regions, you’ll experience "Indian Summer"—stretches of lingering heat followed by the first cool evenings. This is the month of harvest festivals, the return of football, and the very first hints of color on the trees. October: Peak Autumn
October is widely considered the heart of fall. This is when the foliage typically reaches its "peak" in the United States and Europe. The temperatures drop consistently, woodstoves are lit, and the atmosphere turns "spooky" as Halloween approaches. November: The Fading Light what months are the fall
The timing of "fall" is most visible through the trees. As the days get shorter in September and October, trees realize there isn't enough sunlight to keep up the process of photosynthesis. September is the "tug-of-war" month