Autumn also known as?fall?in?North American English[1]?is one of the four?temperate?seasons. Outside the?tropics autumn marks the transition from?summer?to?winter in September (Northern Hemisphere) or March (Southern Hemisphere) when the duration of?daylight?becomes noticeably shorter and the temperature cools considerably. Day length decreases and night length increases as the season progresses until the Winter Solstice in December (Northern Hemisphere) and June (Southern Hemisphere). One of its main features in?temperate climates?is the?shedding of leaves?from?deciduous trees.
