What Months Are The - Fall

The answer depends on whether you're following the meteorological definition (based on annual temperature cycles) or the astronomical definition (based on Earth's position relative to the sun). Here’s the breakdown:

1. Meteorological Fall (Used for climate records and forecasting)

2. Astronomical Fall (Based on equinoxes and solstices)

Quick Summary Table (Northern Hemisphere)

| Definition | Fall Months | | :--- | :--- | | Meteorological | September, October, November | | Astronomical | Late September – Late December (exact dates vary) |

Which one should you use?

🍂 Tip: In the Southern Hemisphere, fall (called autumn) occurs during March, April, and May for both definitions.

So whether you’re chasing pumpkin spice or tracking equinoxes, now you know exactly when fall arrives.

Falling Into Autumn: A Complete Guide to When Fall Actually Happens

When the air turns crisp and the leaves start their vibrant transformation into reds and golds, we know autumn has arrived. But if you’re trying to mark your calendar for the official start of "sweater weather," the answer depends entirely on who you ask—and where on the globe you’re standing.

Whether you are planning a leaf-peeping road trip or just wondering when to break out the pumpkin spice, here is everything you need to know about what months are considered fall. The Two Ways to Define Fall

There are actually two different "versions" of autumn used by scientists, meteorologists, and calendar-makers: Astronomical Fall and Meteorological Fall. 1. Astronomical Fall (The Calendar Version)

In the Northern Hemisphere, this is what most people refer to when they look at a wall calendar. It is defined by the earth's tilt and its alignment with the sun. Months: Late September, October, November, and December.

The Start: It begins with the Autumnal Equinox, which usually falls on September 22nd or 23rd.

The End: It concludes with the Winter Solstice on December 21st or 22nd.

During the equinox, the sun crosses the celestial equator, meaning day and night are roughly equal in length. From this point on, days continue to get shorter and nights get longer until the start of winter. 2. Meteorological Fall (The Weather Version)

Meteorologists and climatologists use a different system. They break the seasons into three-month blocks based on the annual temperature cycle rather than the stars. This makes it much easier for them to calculate monthly weather statistics. Months: September, October, and November. The Start: September 1st. The End: November 30th.

If you feel like "fall" starts the moment Labor Day hits and school begins, you are likely following the meteorological schedule! Fall in the Southern Hemisphere

It’s easy to forget that while the Northern Hemisphere is preparing for pumpkins, the Southern Hemisphere is preparing for peonies. Because the Earth is tilted, the seasons are reversed.

In countries like Australia, New Zealand, South Africa, and Brazil:

Astronomical Fall: Starts around March 20th and ends June 21st.

Meteorological Fall: Comprises the months of March, April, and May. What to Expect Each Month (Northern Hemisphere) September: The Transition

September is the "tug-of-war" month. In many regions, you’ll experience "Indian Summer"—stretches of lingering heat followed by the first cool evenings. This is the month of harvest festivals, the return of football, and the very first hints of color on the trees. October: Peak Autumn what months are the fall

October is widely considered the heart of fall. This is when the foliage typically reaches its "peak" in the United States and Europe. The temperatures drop consistently, woodstoves are lit, and the atmosphere turns "spooky" as Halloween approaches. November: The Fading Light

By November, the bright colors of October usually fade into rustic browns. The air becomes sharper and more brittle. In the U.S., this month is defined by Thanksgiving and the "nesting" phase, where people prepare their homes for the coming winter. Why Do the Leaves Change?

The timing of "fall" is most visible through the trees. As the days get shorter in September and October, trees realize there isn't enough sunlight to keep up the process of photosynthesis.

The green chlorophyll breaks down, revealing the yellow and orange pigments (carotenoids) that were hiding there all along. The deep reds and purples come from glucose trapped in the leaves as the nights get colder. Summary: When is Fall? If you go by the sun: September 22 – December 21. If you go by the weather: September 1 – November 30. If you live "Down Under": March 1 – May 31.

No matter which definition you use, fall remains one of the most beloved seasons for its cozy fashion, beautiful scenery, and the sense of a fresh start.

In the Northern Hemisphere, fall is generally defined as September, October, and November. However, the exact months depend on whether you are using the meteorological or astronomical calendar, as well as your location on the globe. The Quick Answer Northern Hemisphere Fall: September, October, and November. Southern Hemisphere Fall: March, April, and May. Blog Post: When Does Fall Actually Start?

The arrival of "sweater weather" and pumpkin spice is something many of us look forward to all year, but if you ask a scientist and a calendar maker when fall starts, you might get two different answers. Here is everything you need to know about the months that make up the autumn season. 1. The Meteorological Fall (The "Neat" Way)

For record-keeping and simplicity, meteorologists divide the year into four three-month quarters based on annual temperature cycles. Meteorological Versus Astronomical Seasons | News

What Months Are the Fall? A Guide to the Season of Change When the air turns crisp and the leaves begin their transformation into a fiery palette of reds and golds, it’s clear that fall has arrived. But depending on who you ask—or where they live—the official start and end dates of the season can vary.

If you’re wondering exactly what months are the fall, the answer depends on whether you are looking at the calendar through an astronomical lens or a meteorological one. The Astronomical Definition: September to December

For most people in the Northern Hemisphere, fall is defined by the autumnal equinox. This is the moment when the sun crosses the celestial equator, making day and night approximately equal in length. Start Date: Typically September 22 or 23.

End Date: Typically December 21 or 22 (the Winter Solstice).

The "Fall Months": Late September, October, November, and most of December.

Under this definition, fall lasts until the shortest day of the year in December, meaning "holiday season" is technically mostly autumn! The Meteorological Definition: September to November

Meteorologists and climatologists prefer to break the seasons into neat, three-month blocks based on the temperature cycle and the Gregorian calendar. This makes record-keeping and forecasting much simpler. Start Date: September 1. End Date: November 30. The "Fall Months": September, October, and November.

If you consider Labor Day the unofficial start of fall and December 1st the start of winter, you are following the meteorological calendar. Fall in the Southern Hemisphere

It’s important to remember that seasons are reversed on the other side of the equator. While North Americans are carving pumpkins, Australians are preparing for spring. In countries like Australia, New Zealand, and South Africa: Fall Months: March, April, and May. Autumnal Equinox: Occurs around March 20 or 21. Why Does the Timing Matter?

Understanding what months are fall helps with more than just small talk. It dictates several aspects of our lives:

Agriculture: Fall is the primary harvest season for crops like apples, pumpkins, and squash.

Travel: "Leaf peepers" plan trips to New England or the Blue Ridge Mountains based on peak foliage, which usually occurs between late September and mid-October.

Fashion: The transition into the "Ber" months (September through December) marks the shift to layers, boots, and heavier fabrics.

Nature: Many animals begin their migration or prepare for hibernation during these specific months as the daylight hours dwindle. Summary: When is Fall? The answer depends on whether you're following the

In the Northern Hemisphere: September, October, and November (Meteorological) or late September through late December (Astronomical). In the Southern Hemisphere: March, April, and May.

No matter which calendar you follow, fall remains a beloved transitional period—a bridge between the heat of summer and the silence of winter.

Once upon a time, in a world tilted at a perfect 23.5 degrees, there lived two sisters who lived on opposite sides of the Great Equator. They were called North and South, and they had a very peculiar way of sharing the year.

Whenever North put on her favorite orange sweater to watch the leaves turn gold, South was busy planting fresh flowers and greeting the sun. The North’s Harvest

In the Northern Hemisphere, Fall (or Autumn) was a cozy transition from the blazing heat of summer to the icy quiet of winter. North knew Fall was arriving when the calendar hit September.

September: The month of the "Equal Night," or the Autumnal Equinox. This was the official start, usually around September 22nd, when day and night were perfectly balanced.

October: The heart of the season, filled with pumpkins, harvest moons, and crisp air.

November: The final bow of the season, where the last leaves fell and the first frosts whispered of the coming winter. The South’s Golden Hour

As the summer heat begins to wane and the leaves transform into a tapestry of crimson, orange, and gold, many people find themselves asking a simple yet essential question: What months are the fall?

The answer depends on who you ask—an astronomer, a meteorologist, or a cultural historian. While a standard calendar might point to a specific three-month block, the reality of autumn is far more nuanced. In this comprehensive guide, we will break down the official definitions, regional variations, and seasonal markers that actually determine when fall arrives and leaves.

Science gives us the months, but culture tells us when fall actually arrives. Depending on where you live, the answer to "what months are the fall" might shift by a few weeks.

The astronomical start of fall (the autumnal equinox) changes slightly each year because the Gregorian calendar (365 days) isn't perfectly synced with Earth's orbital period (approximately 365.24 days). This is why some years you might see fall begin on September 22, and other years on September 23. In rare cases, it can occur on September 21 or 24.

Everything above applies to the Northern Hemisphere (North America, Europe, most of Asia, northern Africa). Because the Earth’s hemispheres experience opposite seasons, the fall months in the Southern Hemisphere are reversed:

So, while someone in New York is raking leaves in November, someone in Sydney, Australia, is enjoying the flowers of late spring.

If you want the exact astronomical start/end for a specific year, tell me the year and I’ll give the precise dates.

In the United States, September, October, and November are generally considered the fall months. Astronomically, the season begins on the autumnal equinox (usually September 22) and concludes on the winter solstice (December 21). Nourishing NY Fall Seasonal Produce Overview

Fall is known as the "harvest season" because many crops planted in spring or summer reach full maturity. Peak produce during these months includes: Pure Wesson Oil : A transitional month where summer favorites like overlap with early fall arrivals like winter squash : The height of fall harvesting for cranberries pomegranates , and hardy root vegetables like : Focuses on late-maturing crops such as Brussels sprouts cauliflower Complete Produce List by Category Based on guides from the USDA SNAP-Ed Connection Farmers' Almanac

, here is a comprehensive list of what is in season during the fall: Vegetables Seasonal Produce Guide - SNAP-Ed Connection - USDA

In the Northern Hemisphere, fall (or autumn) is primarily identified as the months of September, October, and November

. However, the exact timeframe depends on whether you are using a meteorological or astronomical definition. Seasonal Definition Report 1. Meteorological Fall

Meteorologists define seasons by grouping the 12 calendar months into four 3-month periods based on the annual temperature cycle. Northern Hemisphere: September 1 to November 30. Southern Hemisphere: March 1 to May 31.

This fixed system makes it easier for scientists to track and compare weather data year-over-year. 2. Astronomical Fall Quick Summary Table (Northern Hemisphere) | Definition |

Astronomical seasons are based on the Earth's position relative to the sun and are the dates typically seen on most calendars.

The Two Calendars of Fall: When the Season Truly Begins In the Northern Hemisphere, fall (or autumn) is typically defined by two different calendars: meteorological and astronomical. While most people think of "fall" as starting in September and ending in November, the exact dates depend on whether you are following weather patterns or the Earth's orbit around the sun. 1. Meteorological Fall: September, October, and November

Meteorologists and climatologists divide the year into four equal three-month blocks based on the annual temperature cycle. Months: September, October, and November. Start Date: Always September 1st. End Date: Always November 30th.

Purpose: This fixed schedule allows scientists to compare weather statistics from year to year more easily. It also better reflects the transition from summer’s heat to winter’s chill. 2. Astronomical Fall: Late September to Late December

This is often considered the "official" start of fall on standard calendars and is based on the position of the Earth relative to the sun.

Sunday marks the start of meteorological fall, a period ... - Facebook

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

: 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)

The definition of fall (or autumn) depends on whether you are looking at the calendar through a scientific or a traditional lens. In the Northern Hemisphere, there are two main ways to mark the season:  1. Meteorological Fall (The Simple Way) 

Meteorologists divide the year into groups of three full months based on the temperature cycle. This makes it easier to track weather statistics.  Months: September, October, and November. Start Date: September 1. End Date: November 30.  2. Astronomical Fall (The Sun’s Way) 

This is defined by the earth's orbit around the sun. It begins when the sun crosses the celestial equator, making day and night roughly equal in length.  Months: Late September through late December.

Start Date: The Autumnal Equinox (usually September 22 or 23). End Date: The Winter Solstice (usually December 21 or 22).  Cultural and Regional Variations 

In everyday life, people often associate fall with specific sensory triggers rather than dates. In the U.S., it often "feels" like fall once the school year starts and Labor Day passes. In terms of nature, the "peak" of fall—marked by changing leaf colors and crisper air—typically hits in October. 

In the Southern Hemisphere (places like Australia or Brazil), the seasons are reversed: fall occurs during March, April, and May. 

Here’s a clear, concise write-up on the months of fall.

For everyday life, planning a trip to see the leaves, or talking about pumpkin spice season, the answer is clear: September, October, and November.

For the astronomer tracking the precise movement of the sun, fall begins on the autumnal equinox in late September and ends on the winter solstice in late December.

For the meteorologist analyzing climate trends, fall is the fixed three-month block of September, October, and November.

Understanding all three definitions allows you to navigate any conversation about autumn—from a harvest moon to a weather forecast—with confidence.

This definition is based on the position of the Earth in relation to the Sun. It is the definition most people learn in school and is often cited on calendars.

Astronomical fall begins on the Autumnal Equinox and ends on the Winter Solstice. Because the Earth’s orbit is not a perfect circle, the exact dates shift slightly from year to year, usually falling within a day or two of specific dates.

Under the astronomical definition, the bulk of the season still falls in September, October, and November, but roughly three weeks of December are technically considered autumn.