It is important to remember that seasons are reversed below the equator. If you are in Australia, New Zealand, South America, or South Africa, fall occurs during the Northern Hemisphere’s spring.
Foliage timing varies dramatically by latitude, altitude, and local climate. In Florida, fall color may not appear until December. In the Canadian Rockies, leaves can start changing in late August.
Scientists and calendar makers determine the start of seasons in two distinct ways: meteorological and astronomical. Meteorological Fall what months are the fall
Late March (March Equinox) to late June (June Solstice). Breakdown of Northern Hemisphere Fall Months
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Both are correct, depending on the definition. September 1 is meteorological fall; September 22/23 is astronomical fall. There’s no universal rule – choose the one that suits your purpose.
Whether you define fall by the equinox or by the calendar month, represent the core autumn season. It is a time defined by cooling temperatures, changing leaves, and a transition towards winter. In Florida, fall color may not appear until December
In Chinese astronomy and traditional calendars, autumn spans the months of July, August, and September on the lunar calendar? Actually, it's more complex. The traditional Chinese lunisolar calendar divides the year into 24 solar terms. Autumn includes six solar terms:
| Month | Astronomical Fall | Meteorological Fall | | :--- | :--- | :--- | | | Starts Sept 22/23 | ✅ Full month | | October | ✅ Full month | ✅ Full month | | November | ✅ Full month | ✅ Full month | | December | Until Dec 21/22 | ❌ (Winter starts Dec 1) |
The concept of autumn varies by your global location and the system you use to measure time. While most people associate the transition to cooler weather with specific calendar months, the exact timing depends on whether you look at the calendar through a meteorological lens or an astronomical one.
Trees stop producing green chlorophyll, revealing underlying carotenoid and anthocyanin pigments.