When Does Autumn Start -

(Australia, Brazil, South Africa): Autumn starts between March 19–21 .

A noticeable drop in humidity and the arrival of "killing frosts" in northern regions. when does autumn start

On this day, the sun crosses the celestial equator. For us in the Northern Hemisphere, the sun moves southward. The result is a day where the hours of daylight and darkness are almost perfectly equal. From this point forward, the nights grow longer than the days, sending us hurtling toward winter. For us in the Northern Hemisphere, the sun moves southward

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In the United States, the first day of autumn is often considered to be September 22nd or September 23rd, depending on the year. This date marks the official beginning of the season, and many people celebrate by enjoying the outdoors, apple picking, and sipping pumpkin spice lattes.

(U.S., Europe, Canada, China): Autumn starts between September 21–24 .