Meteorologists divide the year into four equal three-month periods. This system aligns precisely with the Gregorian calendar and simplifies climate data tracking. Starts September 1. Ends November 30. Southern Hemisphere: Starts March 1. Ends May 31. Astronomical Fall
Starts around September 22 or 23. Ends around December 21 or 22. what month is fall
Astronomers base seasons on the physical position of Earth relative to the sun. This system begins with the autumnal equinox, when day and night reach near-equal length. Meteorologists divide the year into four equal three-month