In the Northern Hemisphere, while the official astronomical fall starts late in the month (around September 22-23), meteorological definitions classify the entire month as autumn. The Two Sides of September: A Detailed Breakdown
: In the Northern Hemisphere, summer officially ends at the autumnal equinox, which usually falls on September 22 or 23 . This means roughly the first three weeks of September are astronomically summer, while the last week is fall. september fall or summer
"September, the month of transition! As the summer heat begins to fade, and the leaves start to change, September is a time of refreshing change. In the Northern Hemisphere, while the official astronomical
The answer to "September fall or summer" changes dramatically by geography. In the Northern Hemisphere