Autumnal equinox 2025 brings fall to the Northern Hemisphere on Sept. 22 The autumn equinox brings fall to the Northern Hemisphere today when the sun passes over our planet's equator at noon. Astrobitica September 19, 2025 (Last updated: September 20, 2025) 1 minute read The autumn equinox brings fall to the Northern Hemisphere today when the sun passes over our planet’s equator at noon. About the Author Astrobitica Administrator Visit Website View All Posts Post navigation Previous: Who is the pre-school cartoon ‘Star Trek: Scouts’ made for? (hint: it’s not kids)Next: How a plant hormone helps roots bend and grow downward toward gravity