In the Northern Hemisphere (North America, Europe, most of Asia and Africa), autumn occurs in the latter half of the year.
The primary difference is that meteorological seasons always start on the first of the month, making it easier for scientists to track climate data. Astronomical seasons are based on the Earth's tilt and position relative to the sun. Meteorological Autumn Astronomical Autumn September 1 Sept 22/23 (Equinox) End Date (North) November 30 Dec 21/22 (Solstice) Start Date (South) March 20/21 (Equinox) End Date (South) June 20/21 (Solstice) Basis Annual temperature cycle Earth's orbit and tilt Cultural Variations what are the months in autumn
Regardless of the exact start date, autumn is characterized by several natural phenomena: In the Northern Hemisphere (North America, Europe, most
Late summer heat often lingers (known as "Indian Summer"). Nature: Trees begin to slow down chlorophyll production. In the Northern Hemisphere (North America