For the purposes of weather forecasting and climate data analysis, meteorologists divide the year into four equally spaced seasons, each consisting of three full months. This definition is often more practical for civil and agricultural planning and aligns more closely with the "calendar months" most people associate with the seasons.
The astronomical definition is based on the position of Earth in its orbit. The year is divided by two solstices and two equinoxes. Under this system, the monthly assignments are fluid, as the specific dates of equinoxes and solstices vary slightly each year (occurring between the 20th and 23rd of their respective months). what are the seasons months
The concept of "seasons" derives from the Earth's axial tilt relative to its orbital plane around the Sun. While the physical changes in weather and daylight are universal, the calendar assignment of these changes into specific months is a human construct. Consequently, the question "what are the seasons months" requires distinguishing between two primary systems of classification: the astronomical calendar and the meteorological calendar. This paper focuses on the standard Gregorian calendar assignments used in North America and Europe. For the purposes of weather forecasting and climate
Many indigenous groups, such as those in Australia or North America, recognize 6 or more seasons based on biological events like certain flowers blooming or animal migrations. Important: When do seasons "officially" start? The year is divided by two solstices and two equinoxes
In regions near the equator, there are no "cold" winters. Instead, the year is divided by rainfall patterns.
The months associated with each season depend entirely on your and whether you use the meteorological (temperature-based) or astronomical (orbit-based) calendar. Four-Season Regions (Temperate Zones)
Starts on the Equinox or Solstice (usually the 20th–22nd of the month). You can check exact dates for each year at Time and Date. Meteorological Versus Astronomical Seasons | News