Data from NOAA and the UK Met Office reveal:
Why meteorological and astronomical fall start on 2 different dates
The fundamental driver of seasons is insolation. september fall or summer
From a pure atmospheric science perspective, September is the first month of meteorological autumn in the Northern Hemisphere (September, October, November). This definition is based on the annual temperature cycle, not on calendar tradition.
September occupies a unique and often paradoxical position in the annual calendar. Meteorologically, it is defined as the first month of autumn in the Northern Hemisphere. Yet, for millions of residents, particularly in temperate and continental climate zones, the lived experience of September often defies this classification. This report investigates the core question: Is September truly a fall month, or does it function as an extension of summer? Data from NOAA and the UK Met Office
September 1st marks the beginning of the "cooling down" process.
This conflict is not merely semantic. It affects energy consumption (air conditioning vs. heating), agricultural harvests (late-season crops vs. frost risk), tourism revenue (end-of-summer travel vs. leaf-peeping season), and even human psychology (back-to-school melancholy vs. summer’s lingering joy). September occupies a unique and often paradoxical position
September is technically considered , depending on which calendar you use.