The answer depends entirely on whether you are talking to a meteorologist, an astronomer, or someone living in the Southern Hemisphere. The Two Ways We Define Autumn
September 1 – November 30 (Meteorological) or September 22 – December 21 (Astronomical). what months are autumn
So, what months are autumn? For the most widely accepted, practical, everyday answer: in the Northern Hemisphere; March, April, and May in the Southern Hemisphere. This is the meteorological definition used by weather services, schools, and most commercial calendars. The answer depends entirely on whether you are
Knowing the specific months of autumn helps with more than just wardrobe choices. It’s a critical period for: For the most widely accepted, practical, everyday answer:
Meteorologists divide the year into four three-month groups based on the annual temperature cycle and our Gregorian calendar. This makes it much easier to track climate statistics and compare weather patterns from year to year. September, October, and November.
Starts around March 20 (Equinox) and ends around June 21 (Solstice). "Make Paper" (Autumn Paper Craft Ideas)