By one definition, summer in the Northern Hemisphere begins at the summer solstice, when the sun is directly overhead at the northernmost point (the Tropic of Cancer). This is on or around June 21. In the Southern Hemisphere, the summer solstice occurs when the sun is directly overhead the Tropic of Capricorn, around December 21.
"Meteorological summer" in the Northern Hemisphere begins on June 1 and ends August 31.
No.
The Autumn equinox falls on the 23 of September. It is on this day that daytime and nighttime are of equal length. Ideally equinox's and solstice's are in the middle of their named seasons
Meteorologically the official start of Fall is the 1st of September (we do not feel the seasonal effects until some time after this date due to the thermal latency of the ground and sea) and continues until the 30th of November.
In the UK (where I live) the temperature has slowly fizzled down over the past few weeks, but there has been little shedding of leaves from our trees.
In conclusion, the official start of autumn is no real indicator of when it really starts. The signs of Fall arriving, move a couple of weeks this way or that each year.
So officially and anciently, we are already in the thick of Fall.
But so far as my senses are concerned, Autumn has only just begun...
Dr Gman
Fall in the US According to the website USA.gov, the first day of Fall (Autumn) in the US is Wednesday September 22, 2010, at 11:09 PM ET. (See Related links.)
The first day of Autumn/Fall is called the autumnal equinox.
The northern hemisphere has two seasons at a time. In the northwest, the official first day of fall is September 21st. In the northeast, the official first day of fall is June 21st. Technically, though, if you looked at the real symptoms of fall, the first days of fall would be October 24th in the northwest and May 24th in the northeast.
The first day of summer is December: fall, March 21; winter, June 21; spring, September 21.
The first date of the spring equinox is March 20th
September 21, 1984
Fall in the US According to the website USA.gov, the first day of Fall (Autumn) in the US is Wednesday September 22, 2010, at 11:09 PM ET. (See Related links.)
September 21, 1978 fell on a Thursday.
In the UK, the autumnal equinox falls on September 23 at 4:21 am.
Monday
Sunday DQ
Saturday
The day varies. In the north it is around September 21, and in the south it is around March 21.
The first day of Autumn/Fall is called the autumnal equinox.
Everywhere in the southern hemisphere, the first day of fall is March 21. The first day of winter is June 21. Antarctica is in the southern hemisphere.
The northern hemisphere has two seasons at a time. In the northwest, the official first day of fall is September 21st. In the northeast, the official first day of fall is June 21st. Technically, though, if you looked at the real symptoms of fall, the first days of fall would be October 24th in the northwest and May 24th in the northeast.
The first day of winter everywhere in the Southern Hemisphere is June 21 and the first day of spring is September 21.