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Autumn, or fall, season of the year between summer and winter during which temperatures gradually decrease. The autumn temperature transition between summer heat and winter cold occurs only in middle and high latitudes; in equatorial regions, temperatures generally vary little during the year.
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).
Sandwiched between blazing summer and chilly winter, autumn is the "cooling off" season. Nighttime arrives earlier, temperatures begin to drop and most vegetative growth decreases.
The four seasons — winter, spring, summer, autumn — can vary significantly in characteristics and can prompt changes in the world around them. Here, we explore the seasons of the year in more ...
Autumn is one of the four Earth’s seasons, that goes after summer and foreshadows winter. This season also can be called as Fall and it is about big changes in nature and environment. Autumn means a lot of fun and outdoors activities.
Autumn the time of harvest festivals and falling leaves is here. Classroom resources for teaching about the changing seasons.
The signs of fall start much earlier than the autumnal equinox, even if the weather still feels summer-like. Look around you. Observe the birds, the plants, the sunrise and -set. Here are some signs of fall that you might notice. See our Autumnal Equinox page to find out when fall begins—plus fall facts and folklore.
Autumn, as defined by the Earth's orbit around the Sun, begins on the equinox which falls on 22 or 23 September. However, to record climate data, it is important to have set dates that can be...
North of the equator, fall begins in September; in the Southern Hemisphere, it starts in March. Find out exact dates and how the fall season is defined. In temperate climes, fall can be magical as trees display their autumn foliage. ©iStockphoto.com/Songquan Deng. September equinox 2024: Sun to cross equator.
Fall and autumn are often used interchangeably to describe the third season of the year. But did you know there's a difference in their original meanings?