The changing of the seasons is caused by the tilt of the Earth's axis as it orbits the sun. As the Earth rotates on its axis, different parts of the planet are exposed to the sun's rays, resulting in changes in temperature, daylight hours, and weather patterns. During the fall season, the Northern Hemisphere is tilted away from the sun, resulting in less direct sunlight and cooler temperatures.
In many regions, September is "shoulder weather." You’ll experience warm afternoons followed by unexpectedly chilly evenings. This is when the first hints of yellow appear in the trees.
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