when the Fall season start?

01-09-2026

In the Northern Hemisphere, the start date of fall (autumn) depends on the definition used:
  • Astronomical Fall: Starts around September 22 or 23 with the autumnal equinox.
  • Meteorological Fall: Starts on September 1.
In the Southern Hemisphere, the seasons are reversed:
  • Astronomical Fall: Starts around March 20 or 21.
  • Meteorological Fall: Starts on March 1.


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