If you live in the Northern Hemisphere and someone asks what months are in fall, the simplest answer is . By the time the calendar hits December, even if the "official" winter solstice hasn't arrived, most of the world has already embraced the winter chill.
In the Northern Hemisphere, fall (or autumn) traditionally encompasses the months of .
The "best" fall month for many, characterized by a definite chill in the air and the final shedding of leaves. The Astronomer’s Story: Following the Sun what months are in fall
In the North, September is the month of "back to school" and the final harvests. The days begin to noticeably shorten, and the first hints of color appear in the trees.
The transition begins as the heat of summer fades and school returns. If you live in the Northern Hemisphere and
The unsatisfying but honest answer:
If you are in Australia or South America, fall happens during March, April, and May . The "best" fall month for many, characterized by
You might notice that the astronomical start date of fall changes by a day or two each year (shifting between Sept 21, 22, and 23). This happens because a calendar year (365 days) doesn't perfectly match the time it takes for Earth to orbit the sun (365.25 days). Our leap year system helps keep things close, but it causes the equinox to "drift" slightly.