When Do the Seasons Start and End in 2025 and 2026?

There are two common ways to define the seasons:

• Astronomical seasons follow the Sun’s position. Spring begins at the vernal equinox and ends the day before the summer solstice, summer begins at the summer solstice and ends before the autumnal equinox, and so on.
• Meteorological seasons follow the calendar and average temperatures. Spring runs March 1 to May 31, summer June 1 to August 31, fall September 1 to November 30, and winter December 1 to February 28 (or 29 in leap years).

Scroll down for a quick overview chart, followed by per-season details and beginner-friendly explanations.

Season Start and End Dates for Spring, Summer, Fall, and Winter in 2025–2026

The table below shows all four seasons, including both astronomical and meteorological dates, for quick reference.

Seasons 2025: Astronomical and Meteorological

Seasons 2026: Astronomical and Meteorological

Tip: Astronomical dates shift slightly each year because Earth’s orbit doesn’t perfectly match our calendar, while meteorological dates are fixed.

1. Spring 2025 and 2026

Spring is a time of renewal, longer daylight, and gradually warming temperatures. Flowers begin to bloom, trees regain their leaves, and many animals become more active after winter. 

• Astronomical spring starts with the vernal equinox, when day and night are roughly equal, and ends the day before the summer solstice.
• Meteorological spring runs from March 1 to May 31, making it easy to compare seasonal weather year to year.

Tip: Astronomical dates shift slightly each year due to Earth’s orbit, while meteorological dates are fixed.

2. Summer 2025 and 2026

Summer brings the longest days, warm temperatures, and plenty of sunshine. People enjoy outdoor activities, vacations, and growing crops.

• Astronomical summer begins with the summer solstice and ends the day before the autumnal equinox, when temperatures gradually cool and daylight starts to shorten.
• Meteorological summer runs June 1 to August 31.

Fun fact: Exact astronomical dates vary slightly each year and can differ by a day depending on your time zone.

3. Fall 2025 and 2026

Fall is marked by cooler temperatures, shorter days, and colorful leaves. Many regions celebrate harvests.

• Astronomical fall starts with the autumnal equinox and ends the day before the winter solstice.
• Meteorological fall runs September 1 to November 30, helping track seasonal weather patterns.

Note: In the Southern Hemisphere, the seasons are reversed — fall in the Northern Hemisphere is spring in the Southern Hemisphere.

4. Winter 2025 and 2026

Winter has the shortest days, longest nights, and coldest temperatures. Snow and ice are common in many regions, and daylight gradually increases after the solstice.

• Astronomical winter starts with the winter solstice and ends the day before the vernal equinox.
• Meteorological winter runs December 1 to February 28 (or 29 in leap years).

Tip: The precise moment of the solstice may vary by time zone—check the Almanac Time Zone Converter for exact timing.

Why Do Season Start and End Dates Change?

The calendar is a man-made invention, and it doesn’t perfectly match Earth’s orbit. That means the exact start and end dates of astronomical seasons can shift by a day or two each year.

Leap years keep the calendar roughly in sync, but small adjustments — like skipped leap days in certain century years — still cause slight variations.

Meteorological seasons, on the other hand, follow the calendar exactly, making it easy to track weather and compare seasonal start and end dates year to year.

What Causes the Seasons?

Seasons happen because Earth is tilted as it orbits the Sun. Imagine Earth like a slightly leaning spinning top — it’s always tilted in the same direction as it moves around the Sun.

Because of this tilt:

• Different parts of the planet get more or less direct sunlight at different times of the year.
• When your part of the world tilts toward the Sun, it’s warmer and the days are longer — that’s summer.
• When your part tilts away from the Sun, it’s colder and the days are shorter — that’s winter.

This is also why seasons are opposite in the Northern and Southern Hemispheres. For example, when it’s summer in the Northern Hemisphere, it’s winter in the Southern Hemisphere.

FAQ About the Seasons

Q. Which season is the shortest?

A. Winter is the shortest in the Northern Hemisphere, lasting about 89 days due to faster orbital speed near perihelion.

Q. Why are there astronomical and meteorological seasons?

• Astronomical seasons track the Sun’s position (equinoxes and solstices).
• Meteorological seasons follow the calendar and temperature cycles for easier record-keeping.

A. Why do the dates of seasons change each year?

A. Small shifts occur because Earth’s orbit doesn’t perfectly match the calendar year. Leap years and orbital variations adjust equinox and solstice timing.

Q. Do seasons start on the same day worldwide?

A. No. Astronomical events happen at the same moment globally, but seasons depend on your hemisphere. Summer in the Northern Hemisphere is winter in the Southern Hemisphere.

Q. When do the seasons end?

A. Each season ends the day before the next astronomical season begins, or at the end of the meteorological months (e.g., spring ends May 31, summer ends August 31).

What’s your favorite season—and why? Let us know in the comments below!