What is the last month of autumn?

Answer 1

There is no official date for autumn that carries any legal sanction like the days, months, and years that are the official/legal units of time. The World Meteorological Organization designates September 1 local time as the first day of the climatological autumn season. The International Astronomical Union designates the Autumnal Equinox as the beginning of the astronomical autumn season. In 2010, this falls on September 22 across most of North America and September 23 across Europe and Atlantic Canada. The astronomical seasons have been picked up and heavily promoted by the mass media, educators, and calendar makers. In fact though, the conventional astronomical reckoning has no more official status than any other method of determining seasonal change. The ecological autumn season begins locally whenever the leaves of deciduous trees change colour and begin to fall to the ground. The timing of this varies from one region to another and can even shift from one year to the next.

Answer 2

Autumn is the time of year when summer changes into winter. This transition period has no fixed time, it all depends on the local weather pattern at the time, so autumn ends when winter starts.

In 'seasonal' terms autumn is determined in large measure by the Autumnal Equinox, which is in late March in the Southern Hemisphere, and late September in the northern hemisphere, autumn starting about three or four weeks before and running for about three months.

If we are concerned with weather patterns generally, then the autumn season 'meteorologically' begins at the beginning of the month and continues for the next two months, e.g. 1st March to 31st May in the southern hemisphere.

In some countries there may be 'official' calendar dates for the start and end of autumn.

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Answer 3

In the Northern Hemisphere, September 22.

In the Southern Hemisphere, March 22.

A:The date when night and day are nearly of the same length and Sun crosses the celestial equator (i.e., declination 0) either southward or northward. In the southern hemisphere, the autumnal equinox corresponds to the center of the Sun crossing the celestial equator moving northward and occurs on the date of the northern vernal equinox. The autumnal equinox marks the first day of the season of autumn.

Answer 4

Either December 21 or 22, depending on the cycle of leap years. Autumn officially ends at the Winter Solstice.

For the southern hemisphere, that would be June 21 or 22.

Answer 5

September 22

Answer 6

on december autumn/fall ends

Answer 7

The last month of autumn is November.

Answer 8

91 days

Answer 9

November