One definition is driven by weather data, the other by the sun’s path — and both are correct ways to mark the start of fall.

Meteorological fall and astronomical (or calendar) fall are not the same. Meteorologist Taylor Stephenson explains the ...

Autumn is nearly here, unless you recognize the meteorological format of seasons. Meteorological seasons are monthly based. So, fall or autumn is seen from September 1 to November 30. These are the ...