What Months Are The Fall [top]

The definition of fall (or autumn) depends on whether you use the meteorological calendar or the astronomical one. In the Northern Hemisphere, it generally spans from September through November or December. 1. Meteorological Fall

Meteorologists divide the year into equal three-month blocks based on the temperature cycle. This makes it easier to track and compare climate statistics year-to-year. Months: September, October, and November. Start Date: September 1st. End Date: November 30th. 2. Astronomical Fall

This is based on the Earth's position relative to the sun, specifically the tilt of the Earth's axis. Months: Late September through late December.

Start Date: The Autumnal Equinox, which usually falls on September 22nd or 23rd.

End Date: The Winter Solstice, which usually falls on December 21st or 22nd. 3. Southern Hemisphere Fall In the Southern Hemisphere, the seasons are reversed. Autumn: a burst of colour - Met Office

The months considered "fall" (or autumn) depend on whether you are using a meteorological astronomical calendar, as well as which hemisphere you are in. Fall in the Northern Hemisphere (Includes the USA, Canada, Europe, and most of Asia) Meteorological Fall what months are the fall

: Consists of three full calendar months to make record-keeping easier. September, October, and November Astronomical Fall : Based on the Earth's tilt and orbit around the sun. Autumnal Equinox (typically September 22 or 23 Winter Solstice (typically December 21 or 22 The New York Times Fall in the Southern Hemisphere

(Includes Australia, New Zealand, South Africa, and South America)

Method 1: Astronomical Fall (The Equinox Approach)

Most traditional calendars and almanacs rely on the astronomical definition. This method defines seasons by Earth's position relative to the sun, specifically using the two equinoxes (spring/fall) and the two solstices (summer/winter).

The Southern Hemisphere: When is Fall Down Under?

It is crucial to remember that seasons are not global. While people in New York are carving pumpkins in October, people in Sydney, Australia, are planting spring flowers.

If you live in the Southern Hemisphere (South America, southern Africa, Australia, and Antarctica), the fall months are: The definition of fall (or autumn) depends on

  • March
  • April
  • May

During these months, the Southern Hemisphere tilts away from the sun, resulting in cooler temperatures, falling leaves (in temperate zones), and the harvest season.

Meteorological fall

Meteorologists and many climatologists define seasons by whole calendar months for easier statistical comparison:

  • Northern Hemisphere: September, October, November.
  • Southern Hemisphere: March, April, May.

This system fixes fall to the three-month block that contains the equinox and the following two months.

In October (or April in the south)

  • Peak Foliage: For most of the Northern Hemisphere, mid-October is the peak time for red, orange, and yellow leaves.
  • First Frost: Gardeners watch the forecast closely as the risk of killing frost increases dramatically.
  • Animal Migration: Birds begin flying south in earnest; squirrels become frantic about storing nuts.

A Month-by-Month Breakdown

Here is what you can generally expect during the three distinct phases of fall in the Northern Hemisphere:

The American Perspective

In the United States, fall is synonymous with the "Back to School" season (which now often starts in late August) and the arrival of Halloween and Thanksgiving. Method 1: Astronomical Fall (The Equinox Approach) Most

  • Perceived Start: The Tuesday after Labor Day (first week of September).
  • Perceived End: The day after Thanksgiving (late November), when Christmas decorations take over.

Why do some countries celebrate harvest festivals in different months?

This depends on growing cycles. For example:

  • USA (Thanksgiving): Late November (fall).
  • Germany (Oktoberfest): Late September to early October (fall).
  • China (Mid-Autumn Festival): Late September or early October (fall).
  • India (Makar Sankranti): January (which is winter, but marks the harvest).

4. Environmental Indicators: Phenological Fall

There is a third, less scientific way to define fall: Phenology, or the study of periodic plant and animal life cycle events. Nature does not check the calendar; it follows the weather.

In this view, fall begins when the environment decides it has arrived.

  • For the trees: Fall begins when chlorophyll breaks down in the leaves, causing them to turn red, orange, and gold. In some northern regions, this can happen as early as late August, while in southern states, it might not peak until late October or even November.
  • For the birds: Fall begins when migratory birds start flying south for the winter.
  • For the farmer: Fall begins with the harvest. It is the season of apples, pumpkins, and the final collection of crops before the ground freezes.

Under this definition, fall can last longer or shorter than three months depending on the specific climate of a region. In the Arctic, "fall" might only last a few weeks as summer instantly transitions into winter. In tropical regions near the equator, there is essentially no fall at all; the seasons are usually divided between "wet" and "dry" rather than spring, summer, fall, and winter.