calendar. While most people mark the change of seasons with the equinoxes and solstices, scientists and meteorologists use a simplified system of whole calendar months to keep consistent climate records. 1. Meteorological Seasons (Fixed Months)
This system divides the year into four consistent three-month segments to make weather data easier to compare. months for the seasons verified
While we often think of seasons as fixed periods on a calendar, they are actually verified by two distinct systems: the astronomical and the meteorological calendars. Both systems divide the year into four parts—spring, summer, autumn, and winter—but they use different benchmarks to determine when one ends and the next begins. 1. The Astronomical Calendar: Guided by the Stars calendar
In 2007, the World Meteorological Organization (WMO) officially standardized the meteorological seasons for all climate normals (1991-2020, 2001-2030, etc.). Today, every verified weather report uses March-May (Spring), June-Aug (Summer), Sep-Nov (Fall), Dec-Feb (Winter) . May Summer: June
In India, the seasons are verified by the India Meteorological Department (IMD)
Meteorologists divide the year into four 3-month periods based on the annual temperature cycle and our Gregorian calendar. This is the version most commonly used for weather reporting and record-keeping because the dates stay the same every year. Spring: March, April, May Summer: June, July, August Autumn (Fall): September, October, November Winter: December, January, February Southern Hemisphere: Spring: September, October, November Summer: December, January, February Autumn (Fall): March, April, May Winter: June, July, August 2. The Astronomical Method (The Solstices and Equinoxes)