fall
The Fall Equinox is the September Equinox in the Northern Hemisphere and the March Equinox in the Southern Hemisphere. The weather seasons can be roughly decided by the month in which the season starts and the two months following. northern hemisphere - September, October, November (begins Sept 22/23) Southern Hemisphere - March, April, May (begins March 20)
In the northern hemisphere August is in summer which lasts from 22 June through to 22 September
The begining of winter in the northern hemisphere and its SEASONS!
Remember that if it is summer in the northern hemisphere, it is winter in the southern hemisphere. The US is in the northern hemisphere and Peru is in the southern. Summer in Peru lasts from December 22 to March 21.
The autumnal equinox brings the fall season to the Northern Hemisphere on: September 22 each year.
Spring is not a month, it is a SEASON. The season of spring starts on the day of an Equinox and continues to the flowing Solstice, a period of about 3 calendar months. Obviously the equinox start point depends on which of the Northern or Southern hemispheres you are asking about. In the northern hemisphere spring starts on or about the 20th March, in the Southern Hemisphere Spring starts on or about September 22.
The shortest day in the Northern Hemisphere is December 21st.
Nominally from June 21 until September 21 or 22, the northern hemisphere is in summer, whereas the southern hemisphere is in winter.
Fall season mainly starts between summer and winter. Accoring to astronomical terms, the season starts on September 22 up to November 22 in the Northern Hemisphere. In the US, it would cover the months from September till November. In the United Kingdom and other European countries, the season covers the period from August, September and October. When it comes to Southern Hemisphere, the period can be opposite. The season extends from March 22 to June 22.
solstice
September 22
In the southern hemisphere they are opposite: Mar 21 autumn starts, June 21 winter starts, Sep 22 spring starts, Dec 21 summer starts.