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Astronomical Fall Begins Tuesday: What the Autumnal Equinox Means for Skywatchers – WTOP News
- On Tuesday, Sept. 22, 2026, the autumn equinox marks the official astronomical beginning of fall across the Northern Hemisphere at 8:05 p.m. EDT.
- Derived from Latin words meaning "equal night," the event occurs as Royal Museums Greenwich noted, "the Sun passes the celestial equator," resulting in nearly equal day and night.
- Cooler air has settled across parts of the Northeast, with the first hints of fall color appearing, as shorter days trigger the annual transformation of leaves into red, orange and yellow.
- The National Weather Service and AccuWeather meteorologists are tracking a developing coastal storm capable of producing heavy rain and strong winds to portions of the East Coast later this week.
- Future seasonal milestones include the winter solstice on Dec. 21, 2026, marking the shortest day of the year, and daylight saving time ending on Nov. 1.
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262 Articles
262 Articles
When is calendar autumn beginning? Is it on the same date every year? And what is the difference between meteorological and calendar autumn beginning 2026?
After months of afa and record temperatures, summer 2026 came to an end: in the night between 22 and 23 September, at 2:05, the fall equinox fell, the instant...
·Milan, Italy
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And, contrary to an idea still quite widespread, autumn does not necessarily begin on September 21
·Lisboa, Portugal
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On this day, day and night are approximately the same length all over the world.
·Ljubljana, Slovenia
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At 2:05 on Wednesday there was the equinox: the instant that marks the passage from summer to autumn
·Italy
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·Helsinki, Finland
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Total News Sources262
Leaning Left38Leaning Right15Center83Last UpdatedBias Distribution61% Center
Bias Distribution
- 61% of the sources are Center
61% Center
L 28%
C 61%
11%
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