Autumn

<p>Autumn, also known as fall (especially in US & Canada), is one of the four <a href="/facts/Temperate/6WPypCzC">temperate</a> seasons on <a href="/facts/Earth/HLLmDfj0">Earth</a>. Outside the tropics, autumn marks the transition from <a href="/facts/Summer/v3DY22Uq">summer</a> to <a href="/facts/Winter/kSp26z8R">winter</a>, in September (<a href="/facts/Northern_Hemisphere/EFwyqL25">Northern Hemisphere</a>) or March (<a href="/facts/Southern_Hemisphere/QfJ4z9L5">Southern Hemisphere</a>). Autumn is the season when the duration of <a href="/facts/Daylight/G4GSx61M">daylight</a> becomes noticeably shorter and the temperature cools considerably. Day length decreases and night length increases as the season progresses until the <a href="/facts/Winter_solstice/D18JPu6z">winter solstice</a> in December (Northern Hemisphere) and June (Southern Hemisphere). One of its main features in <a href="/facts/Temperate_climates/6WPypCzC">temperate climates</a> is the striking <a href="/facts/Autumn_leaf_color/wwBAjVW5">change in colour</a> of the leaves of <a href="/facts/Deciduous_trees/7jQHVtdd">deciduous trees</a> as they <a href="/facts/Leaf/1m6wCNTg">prepare to shed</a>.
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Autumn open-in-new

Autumn