Fall 2025 begins on Tuesday, September 23, 2025, and ends on Monday, December 15, 2025, in the Northern Hemisphere. In the Southern Hemisphere, fall 2025 begins on Tuesday, March 20, 2025, and ends on Friday, June 19, 2025.
The start of fall marks the changing of seasons, as the days get shorter and the nights get longer. The average temperature also begins to drop, and leaves on trees begin to change color and fall off. Fall is a time of year that is often associated with beauty, change, and new beginnings.
Fall is also a time of year when many people enjoy spending time outdoors, taking part in activities such as hiking, biking, and camping. It is also a popular time for festivals and events, such as Halloween and Thanksgiving.
1. Astronomical fall
Astronomical fall is the period of the year that begins on the autumnal equinox and ends on the winter solstice. The autumnal equinox occurs when the sun crosses the celestial equator moving southward. In the Northern Hemisphere, this typically occurs around September 22 or 23. In 2025, the autumnal equinox will occur on September 23.
The autumnal equinox is significant because it marks the day when the length of day and night is equal all over the world. After the autumnal equinox, the days in the Northern Hemisphere start to get shorter and the nights start to get longer. This is because the Earth is tilted on its axis and the North Pole is starting to point away from the sun.
The start of astronomical fall is an important date for many reasons. It is a reminder that the seasons are changing and that winter is on its way. It is also a time when many people start to prepare for the colder weather by doing things like putting away their summer clothes and getting their homes ready for winter.
Understanding the connection between astronomical fall and the start of fall is important for a number of reasons. First, it can help us to understand the changing seasons and how they affect our lives. Second, it can help us to plan for the future and to make sure that we are prepared for the colder weather. Finally, it can help us to appreciate the beauty of the changing seasons and to enjoy the unique experiences that each season has to offer.
2. Meteorological fall
Meteorological fall is the period of the year that begins on September 1 and ends on November 30. This definition of fall is based on the annual temperature cycle, with September 1 typically being the first day of the year when the average temperature begins to drop below 60 degrees Fahrenheit in the Northern Hemisphere. In 2025, meteorological fall will begin on September 1.
Meteorological fall is an important component of “when does fall 2025 start” because it provides a consistent and objective way to define the start of fall. This is important for a number of reasons. First, it allows us to compare the start of fall from year to year. Second, it helps us to track the impact of climate change on the timing of the seasons. Third, it provides a basis for planning fall activities, such as harvesting crops and preparing for winter.
The start of meteorological fall is also significant because it marks the beginning of a period of transition. The days start to get shorter, the nights start to get longer, and the leaves on the trees start to change color. This transition can be a beautiful time of year, and it is a reminder that the seasons are always changing.
Understanding the connection between meteorological fall and the start of fall is important for a number of reasons. First, it can help us to understand the changing seasons and how they affect our lives. Second, it can help us to plan for the future and to make sure that we are prepared for the colder weather. Finally, it can help us to appreciate the beauty of the changing seasons and to enjoy the unique experiences that each season has to offer.
3. Northern Hemisphere
The start of fall in the Northern Hemisphere is defined as the autumnal equinox, which occurs on September 23, 2025. This is the day when the sun crosses the celestial equator moving southward, and the length of day and night is equal all over the world. After the autumnal equinox, the days in the Northern Hemisphere start to get shorter and the nights start to get longer.
-
Facet 1: Astronomical Significance
The autumnal equinox is a significant astronomical event that marks the transition from summer to fall. It is the day when the Earth’s axis is tilted neither towards nor away from the sun, resulting in equal amounts of daylight and darkness at all latitudes.
-
Facet 2: Seasonal Changes
The start of fall in the Northern Hemisphere is associated with a number of seasonal changes. The days start to get shorter and the nights start to get longer. The average temperature also starts to drop, and leaves on trees begin to change color and fall off.
-
Facet 3: Cultural and Social Impact
The start of fall has a significant cultural and social impact in many parts of the Northern Hemisphere. It is a time when people start to prepare for the colder weather and the upcoming holidays. It is also a time when many people enjoy spending time outdoors, taking part in activities such as hiking, biking, and camping.
-
Facet 4: Ecological Implications
The start of fall also has a number of ecological implications. Many animals start to prepare for winter by migrating to warmer climates or storing food. Plants also start to prepare for winter by dropping their leaves and going dormant.
In conclusion, the start of fall in the Northern Hemisphere on September 23, 2025 is a significant event with astronomical, seasonal, cultural, and ecological implications. Understanding the connection between this date and “when does fall 2025 start” provides a deeper appreciation for the changing seasons and the impact they have on our lives.
4. Southern Hemisphere
Understanding the connection between “Southern Hemisphere: Begins on March 20, 2025.” and “when does fall 2025 start” requires an exploration of the Earth’s seasons and the concept of hemispheres.
-
Facet 1: Earth’s Seasons
The Earth’s seasons are caused by the tilt of its axis as it orbits the sun. This tilt means that different parts of the Earth receive more or less direct sunlight at different times of the year, resulting in the four seasons: spring, summer, fall, and winter.
-
Facet 2: Hemispheres
The Earth is divided into two hemispheres: the Northern Hemisphere and the Southern Hemisphere. The equator, an imaginary line around the Earth’s middle, separates the two hemispheres. The Northern Hemisphere includes North America, Europe, and Asia, while the Southern Hemisphere includes Antarctica, Australia, and South America.
-
Facet 3: Fall in the Southern Hemisphere
Fall in the Southern Hemisphere begins on March 20, 2025, and ends on June 21, 2025. This is because the Southern Hemisphere is tilted away from the sun during this time of year, resulting in shorter days and cooler temperatures. The autumnal equinox, which occurs on March 20, marks the day when the sun crosses the celestial equator moving northward, and the length of day and night is equal all over the world.
-
Facet 4: Cultural and Social Impact
The start of fall in the Southern Hemisphere has a significant cultural and social impact in many countries. It is a time when people start to prepare for the cooler weather and the upcoming holidays. It is also a time when many people enjoy spending time outdoors, taking part in activities such as hiking, biking, and camping.
In conclusion, the start of fall in the Southern Hemisphere on March 20, 2025, is a significant event with astronomical, seasonal, cultural, and social implications. Understanding the connection between this date and “when does fall 2025 start” provides a deeper appreciation for the changing seasons and the impact they have on our lives.
5. Daylight saving time
The end of daylight saving time (DST) on November 1, 2025, is closely connected to the start of fall in the Northern Hemisphere. Daylight saving time is a practice of advancing clocks during warmer months to make better use of daylight. It is typically implemented by moving clocks forward one hour in the spring and back one hour in the fall.
In the United States, daylight saving time begins on the second Sunday in March and ends on the first Sunday in November. This means that the end of daylight saving time in 2025 will occur on November 1st. On this day, clocks will be turned back one hour, resulting in more daylight in the morning and less daylight in the evening.
The end of daylight saving time is often seen as a sign that fall has arrived. The shorter days and longer nights are a reminder that winter is on its way. For many people, the end of daylight saving time is a time to adjust to the changing seasons and to prepare for the colder weather ahead.
Understanding the connection between the end of daylight saving time and the start of fall is important for several reasons. First, it can help us to plan for the changing seasons and to make sure that we are prepared for the shorter days and longer nights. Second, it can help us to understand the impact of daylight saving time on our sleep and our overall health. Third, it can help us to appreciate the beauty of the changing seasons and to enjoy the unique experiences that each season has to offer.
6. Temperature
The connection between “Temperature: Begins to drop in September.” and “when does fall 2025 start” is significant because the drop in temperature is a key indicator of the changing seasons. As the days get shorter and the nights get longer, the Earth’s surface cools down, resulting in a decrease in average temperature. This drop in temperature is a natural phenomenon that occurs every year and is a sign that fall is on its way.
The drop in temperature in September is caused by a number of factors, including the Earth’s tilt on its axis and the decreasing amount of sunlight that reaches the Northern Hemisphere. As the Earth orbits the sun, the Northern Hemisphere begins to tilt away from the sun in September. This means that the sun’s rays are less direct and less intense, resulting in a decrease in the amount of heat that reaches the Earth’s surface. Additionally, the days start to get shorter in September, which means that there is less time for the sun to heat the Earth’s surface.
The drop in temperature in September is a gradual process, but it can be noticeable from day to day. The average temperature in September is typically a few degrees cooler than the average temperature in August. By the end of September, the average temperature is typically in the 50s or 60s Fahrenheit in the Northern Hemisphere. This drop in temperature can be a welcome relief from the heat of summer, and it is often a sign that it is time to start preparing for the colder weather ahead.
Understanding the connection between “Temperature: Begins to drop in September.” and “when does fall 2025 start” is important for a number of reasons. First, it can help us to plan for the changing seasons and to make sure that we are prepared for the colder weather. Second, it can help us to understand the impact of climate change on the timing of the seasons. Third, it can help us to appreciate the beauty of the changing seasons and to enjoy the unique experiences that each season has to offer.
7. Leaves
The connection between “Leaves: Begin to change color and fall off in October.” and “when does fall 2025 start” is significant because the changing leaves are a key indicator of the changing seasons. As the days get shorter and the nights get longer, the trees begin to prepare for winter by changing the color of their leaves and dropping them. This process is a natural phenomenon that occurs every year and is a sign that fall is on its way.
-
Facet 1: Chlorophyll Production
The changing color of leaves in autumn is caused by a decrease in chlorophyll production. Chlorophyll is a green pigment that is essential for photosynthesis, the process by which plants convert sunlight into energy. As the days get shorter in autumn, the amount of sunlight available for photosynthesis decreases. This causes the trees to produce less chlorophyll, and the leaves begin to turn yellow and orange.
-
Facet 2: Anthocyanin Production
In addition to chlorophyll, leaves also contain other pigments, such as anthocyanins. Anthocyanins are red, purple, and blue pigments that are responsible for the vibrant fall foliage that we see in many parts of the world. As the days get shorter and the nights get longer, the production of anthocyanins increases. This causes the leaves to turn red, purple, and blue.
-
Facet 3: Leaf Drop
Once the leaves have changed color, they eventually fall off the tree. This is because the tree is preparing for winter and conserving its energy. The leaves are no longer needed for photosynthesis, and the tree can seal off the leaves from the branches to prevent water loss.
-
Facet 4: Cultural and Social Impact
The changing leaves of fall have a significant cultural and social impact in many parts of the world. Fall foliage is often seen as a beautiful and symbolic reminder of the changing seasons. It is also a popular time for people to go for walks, hikes, and drives to enjoy the scenery. In some cultures, the changing leaves are also associated with the harvest and the preparation for winter.
Understanding the connection between “Leaves: Begin to change color and fall off in October.” and “when does fall 2025 start” is important for a number of reasons. First, it can help us to plan for the changing seasons and to make sure that we are prepared for the colder weather. Second, it can help us to understand the impact of climate change on the timing of the seasons. Third, it can help us to appreciate the beauty of the changing seasons and to enjoy the unique experiences that each season has to offer.
8. Holidays
The connection between “Holidays: Halloween is on October 31, 2025, and Thanksgiving is on November 27, 2025.” and “when does fall 2025 start” is significant because these holidays are closely associated with the autumn season. Halloween, which is celebrated on October 31st, is a holiday that originated from ancient Celtic festivals marking the end of the harvest season and the beginning of winter. Thanksgiving, which is celebrated on the fourth Thursday of November, is a holiday that celebrates the harvest and gives thanks for the blessings of the past year.
-
Facet 1: Cultural Significance
Halloween and Thanksgiving are both culturally significant holidays that are celebrated in many countries around the world. Halloween is often associated with costumes, candy, and trick-or-treating, while Thanksgiving is often associated with family gatherings, feasts, and parades. These holidays provide opportunities for people to come together and celebrate the changing seasons and the bounty of the harvest.
-
Facet 2: Seasonal Markers
Halloween and Thanksgiving can also be seen as seasonal markers that indicate the changing of the seasons. Halloween is often seen as the unofficial start of fall, while Thanksgiving is often seen as the unofficial start of winter. These holidays provide a way for people to mark the changing seasons and to reflect on the year that has passed.
-
Facet 3: Economic Impact
Halloween and Thanksgiving have a significant economic impact on many countries. Halloween is a major holiday for the candy and costume industries, while Thanksgiving is a major holiday for the travel and hospitality industries. These holidays provide a boost to the economy and create jobs in a variety of sectors.
-
Facet 4: Historical Context
Halloween and Thanksgiving have a long and rich historical context. Halloween originated from ancient Celtic festivals, while Thanksgiving was first celebrated by the Pilgrims in 1621. These holidays have evolved over time and have taken on different meanings in different cultures, but they both continue to be important cultural events that are celebrated by millions of people around the world.
In conclusion, the connection between “Holidays: Halloween is on October 31, 2025, and Thanksgiving is on November 27, 2025.” and “when does fall 2025 start” is significant because these holidays are closely associated with the autumn season. They provide opportunities for people to come together and celebrate the changing seasons and the bounty of the harvest. They can also be seen as seasonal markers that indicate the changing of the seasons and have a significant economic impact on many countries. Understanding the connection between these holidays and the start of fall can help us to appreciate the changing seasons and to enjoy the unique experiences that each season has to offer.
FAQs on “when does fall 2025 start”
This section addresses common questions and misconceptions surrounding the topic of “when does fall 2025 start.” Each question is answered with concise, factual information to provide a comprehensive understanding of the subject matter.
Question 1: When does fall 2025 start in the Northern Hemisphere?
Answer: Fall 2025 in the Northern Hemisphere begins on Tuesday, September 23, 2025, and ends on Monday, December 15, 2025.
Question 2: When does fall 2025 start in the Southern Hemisphere?
Answer: Fall 2025 in the Southern Hemisphere begins on Tuesday, March 20, 2025, and ends on Friday, June 19, 2025.
Question 3: What is the astronomical definition of the start of fall?
Answer: The astronomical start of fall is the autumnal equinox, which occurs when the sun crosses the celestial equator moving southward. In 2025, the autumnal equinox occurs on September 23.
Question 4: What is the meteorological definition of the start of fall?
Answer: The meteorological start of fall is September 1. This definition is based on the annual temperature cycle, with September 1 typically being the first day of the year when the average temperature begins to drop below 60 degrees Fahrenheit in the Northern Hemisphere.
Question 5: What are some of the key indicators that fall has started?
Answer: Key indicators that fall has started include shorter days, longer nights, cooler temperatures, changing leaf colors, and the migration of birds.
Question 6: What is daylight saving time and how does it affect the start of fall?
Answer: Daylight saving time is the practice of advancing clocks by one hour during warmer months to make better use of daylight. In the Northern Hemisphere, daylight saving time ends on the first Sunday in November, which may occur after the astronomical or meteorological start of fall.
By addressing these common questions, this FAQ section provides a deeper understanding of the topic “when does fall 2025 start.” The information presented here is accurate and comprehensive, ensuring that readers have access to reliable and up-to-date knowledge.
Proceed to the next article section for further insights or related topics.
Tips for Understanding “When Does Fall 2025 Start”
Understanding the exact date when fall 2025 begins can be essential for planning seasonal activities or comprehending the changing seasons. Here are some tips to help you grasp the concept thoroughly:
Tip 1: Consider the Astronomical Definition
The astronomical definition of fall’s onset is based on the autumnal equinox. This occurs when the sun crosses the celestial equator moving southward, resulting in equal day and night lengths worldwide. In 2025, the autumnal equinox occurs on September 23, marking the official astronomical start of fall.
Tip 2: Explore the Meteorological Definition
Meteorologists define the start of fall as September 1st. This definition aligns with the annual temperature cycle, with September 1st typically marking the day when average temperatures begin to drop below 60 degrees Fahrenheit in the Northern Hemisphere.
Tip 3: Understand Hemispheric Differences
The onset of fall varies depending on the hemisphere. In the Northern Hemisphere, fall begins in September and ends in December, while in the Southern Hemisphere, fall begins in March and ends in June. It’s crucial to consider the hemisphere you’re referring to when determining the start of fall.
Tip 4: Use Daylight Saving Time as a Reference
In many regions, daylight saving time ends on the first Sunday of November. This can serve as a helpful reference point for the approximate end of fall, as it typically occurs after the astronomical or meteorological start of fall.
Tip 5: Observe Seasonal Changes
Observing seasonal changes can also provide clues about the onset of fall. Shorter days, cooler temperatures, and changing leaf colors are all indicators that fall is approaching. These natural cues can help you understand the changing seasons and appreciate the transition into fall.
Summary:
By considering these tips, you can develop a comprehensive understanding of when fall 2025 starts, both astronomically and meteorologically. Understanding the differences between hemispheres and observing seasonal changes can enhance your appreciation for the changing seasons and provide valuable insights into the timing of fall’s arrival.
Armed with this knowledge, you can plan your fall activities, anticipate the changing weather patterns, and fully embrace the beauty and transition that this season brings.
Conclusion
The exploration of “when does fall 2025 start” has revealed a multifaceted topic with astronomical, meteorological, hemispheric, and cultural dimensions. Understanding the interplay between these factors is crucial for accurately determining the onset of fall in a given year and location.
As we anticipate the arrival of fall 2025, let us embrace the transition with a renewed appreciation for the beauty of the changing seasons. May this knowledge empower us to plan meaningful activities, appreciate the natural world, and celebrate the unique charm that fall brings to our lives.
