| Aspect | Astronomical Fall | Meteorological Fall | Perceptual / Cultural Fall | | :--- | :--- | :--- | :--- | | | Late Sept to Late Dec | Sept, Oct, Nov | Sept, Oct, Nov | | Start Date | Sept 21-24 | Sept 1 | After Labor Day (US) or school starts | | End Date | Dec 20-23 | Nov 30 | Before Thanksgiving or first snow | | Based On | Earth's orbit & tilt | Annual temperature cycle | Sights, sounds, & traditions | | Key Feature | Autumnal Equinox | Consistent data months | Fall foliage & harvest holidays |
Astronomical seasons are based on the Earth's position relative to the sun and are the dates typically seen on most calendars. what months are the fall
say it’s fall? Depending on who you ask—an astronomer, a meteorologist, or even a local in the Southern Hemisphere—the answer changes. The Two Ways to Define Fall Most of us mark our calendars by one of two systems: Astronomical Meteorological 1. Astronomical Fall (The "Official" Calendar) | Aspect | Astronomical Fall | Meteorological Fall
This version is based on the Earth's position relative to the sun. It begins on the autumnal equinox , when day and night are almost equal in length. Nature's Calendar Northern Hemisphere: Starts around September 22 or 23 and ends around December 21 or 22 (the winter solstice). Southern Hemisphere: Starts around March 20 or 21 and ends around June 20 or 21 AccuWeather 2. Meteorological Fall (The "Weather" Calendar) The Two Ways to Define Fall Most of