Winter is the coldest season in polar and temperature climates that lays in between Fall and Spring. Winter is caused by the axis in the hemisphere being orientated away from the Sun.
Fall is one of the four seasons also known as autumn. Fall marks the transition of summer into winter where it starts to get colder at night and also starts to noticeably gets darker sooner. It usually falls at September or March.
Spring is one of the four conventional temperate seasons, following winter and moving into summer. And when it is spring in the Northern Hemisphere it is Fall at the Southern Hemisphere.
Summer is the warmest of the four temporary seasons. During Summer the days are longer and the nights are shorter. But do to that time zone the date of summer varies according to climate and culture.