Fall in the Northern Hemisphere in 2025 will begin on Monday, September 22, 2025, at 2:19 p.m. EDT (18:19 UTC), marked by the autumnal equinox when day and night are approximately equal in length. This date is the official start of astronomical fall. Meteorologically, fall is often considered to begin on September 1 and lasts through November 30, but the astronomical definition is more widely recognized for the start of the season. Key points about the start of fall 2025:
- Astronomical fall starts September 22, 2025, with the autumnal equinox.
- It is the moment when the sun crosses the equator, leading to roughly equal day and night durations.
- Meteorological fall runs from September 1 to November 30.
- This date marks the transition from summer to fall in terms of Earth's tilt and sunlight distribution.
