Meteorologists and climatologists created this definition for practical reasons: consistent data recording. Astronomical seasons have variable start dates and lengths, making it difficult to compare monthly climate statistics (e.g., "average September temperature") from one year to the next. Therefore, they align the seasons with the calendar months and the annual temperature cycle.
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. Late September through late December. what months are the fall
Meteorologists and climatologists needed a simpler way to compare weather data from year to year. Therefore, they divided the year into four neat, three-month blocks based on the annual temperature cycle and the Gregorian calendar. This is defined by the earth's orbit around the sun
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. Meteorologists and climatologists needed a simpler way to
say it’s fall? Depending on who you ask—an astronomer, a meteorologist, or even a local in the Southern Hemisphere—the answer changes. The Two Ways to Define Fall Most of us mark our calendars by one of two systems: Astronomical Meteorological 1. Astronomical Fall (The "Official" Calendar)
This is based on the Earth's position relative to the sun, specifically the tilt of the Earth's axis. Late September through late December.