In the United States, fall (autumn) is usually considered to run from early September through late November.

The simple answer

  • “Official” (astronomical) fall: From the autumnal equinox around September 22–23 to the winter solstice around December 21 each year.
  • Everyday/meteorological fall: Many people, and agencies like weather services, treat September 1 to November 30 as fall.

So if you ask “when is fall in America?” most people will think of September, October, and November as fall months.

A bit more detail

1. Astronomical fall

This definition is based on the position of Earth relative to the sun.

  • Starts at the autumnal equinox (when day and night are roughly equal length, usually Sept 22–23).
  • Ends at the winter solstice (shortest day, around Dec 21).
  • For example, in 2025, fall runs from September 22 to December 21 in the U.S.

2. Meteorological fall

Weather and climate folks often divide the year into tidy three‑month blocks.

  • Meteorological fall: September 1 – November 30.
  • This matches how many Americans casually think about the season: back‑to‑school, cooler weather, and Thanksgiving all sit inside this window.

3. How people actually “feel” fall

On forums, Americans often say fall “feels” like it starts :

  • Right after Labor Day (first Monday in September).
  • And it feels like it ends sometime after Thanksgiving (late November), even though the astronomical season continues into December.

Because the U.S. is huge, leaf color and temperatures shift at different times : northern states see fall colors earlier, while southern areas can stay warm well into October.

In everyday life, if you plan a “fall trip” or talk about “fall weather in America,” people usually mean September through November , with peak “fall vibes” often in October.

TL;DR: In America, fall is most commonly thought of as September–November , even though the astronomical season runs from about late September to late December.

Information gathered from public forums or data available on the internet and portrayed here.