Because meteorological seasons are fixed to the calendar, their start dates never change.
| Season | Northern Hemisphere | Southern Hemisphere | | :--- | :--- | :--- | | | March 1 – May 31 | September 1 – November 30 | | Summer | June 1 – August 31 | December 1 – February 28/29 | | Autumn (Fall) | September 1 – November 30 | March 1 – May 31 | | Winter | December 1 – February 28/29 | June 1 – August 31 | season change dates
Here is some text on season change dates: Because meteorological seasons are fixed to the calendar,
Meteorological seasons * The length of the meteorological seasons is more consistent than the astronomical seasons, ranging from 9... NOAA (.gov) The Seasons (Equinoxes and Solstices) Page Table_title: Equinoxes and Solstices through 2030 Table_content: header: | Equinoxes and Solstices through 2030 Earth's Seasons - ... National Weather Service (.gov) Why Do We Have Seasons? - National Weather Service Table_title: When are the times and dates of the next equinoxes and solstices? Table_content: header: | Year | Spring Equinox | Wi... National Weather Service (.gov) You may have heard that "meteorological fall" has already ... Sep 9, 2025 — National Weather Service (
For the Southern Hemisphere, swap spring/autumn dates and summer/winter dates.
While the calendar tells us exactly when a season begins, the "feeling" of the season often arrives weeks earlier or later depending on where you live. Whether you prefer the meteorological simplicity of starting a season on the 1st of the month, or the astronomical wonder of the solstice, paying attention to these dates helps us stay connected to the natural world.
Astronomical seasons are defined by the Earth's position relative to the sun. They begin at the (the sun’s highest and lowest points in the sky) and equinoxes (when day and night are nearly equal).
