When Is Fall 2025 Start. But again, this is only for the northern hemisphere, since the southern. — autumn 2025 starts on sunday, september 22nd in the northern hemisphere, with daylight time shortening and the leaves begining to fall with the changing tilt of the.
— autumn 2025 starts on sunday, september 22nd in the northern hemisphere, with daylight time shortening and the leaves begining to fall with the changing tilt of the. — in 2025, the first day of fall, also known as the autumnal equinox, is sunday, sept.