Autumn

Autumn (fall)
Temperate season
	Leaves often turn orange and fall off from trees in the autumn.
Northern temperate zone
Astronomical season	23 September – 22 December
Meteorological season	1 September – 30 November
Solar (Celtic) season	1 August – 31 October
Southern temperate zone
Astronomical season	21 March – 21 June
Meteorological season	1 March – 31 May
Solar (Celtic) season	1 February – 30 April
	Summer; Spring Autumn; Winter

Autumn, also known as fall in American English and Canadian English,[1] is one of the four temperate seasons on Earth. 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.

Quick facts: Temperate season, Northern temperate zone, As... ▼

The variety of colours between the trees and the forest floor is like a giant mural in autumn, particularly out of cityscapes

One of Earth's four temperate seasons / From Wikipedia, the free encyclopedia