Autumn

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). Autumn is the season 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 striking change in colour for the leaves of deciduous trees as they prepare to shed.

Autumn (fall)
Temperate season
Leaves often turn orange and fall off from trees in the autumn.
Northern temperate zone
Astronomical season22 or 23 September – 22 December
Meteorological season1 September – 30 November
Solar (Celtic) season1 August – 31 October
Southern temperate zone
Astronomical season21 March – 21 June
Meteorological season1 March – 31 May
Solar (Celtic) season1 February – 30 April
Summer
Spring Autumn
Winter
The variety of colours between the trees and the forest floor is like a giant mural in autumn, particularly out of cityscapes

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