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Season is the regular changes in the weather throughout the year. The factors responsible for occurrence of seasons are revolution of the Earth, tilt of the earth’s axis, parallelism of earth’s axis. The most important factor is the angle that the sunlight hits the Earth’s surface throughout the year. The seasons are very different in the Northern Hemisphere than in the Southern Hemisphere.

Apparent movement of sun between the Tropic of Cancer and Tropic of Capricorn results into different seasons- spring, summer, autumn and winter.

1. Spring Season: Spring is one of the temperate seasons. Spring is the season of transition from winter to summer. The Northern Hemisphere experiences spring seasons between 21 March and 21 June where as Southern Hemisphere experiences spring season between 23 September and 22 December.

2. Summer Season: Summer is the hottest of the four temperate seasons. Northern Hemisphere experiences summer season between 21 June and 23 September. Southern Hemisphere experiences summer season between 22 December and 21 March.

3. Autumn Season: Autumn is one of the temperate seasons. Autumn marks the transition from summer to winter. This is the season during which the trees generally shed their leaves. Northern Hemisphere experiences autumn season between 23 September and 22 December. Southern Hemisphere experiences autumn season between 21 March and 21 June.

4. Winter Season: Winter is the coldest season in the year in polar and temperate zones. It occurs after autumn and before spring in each year. Northern Hemisphere experiences winter season between 22 December and 21 March. Southern Hemisphere experiences winter season between 21 June and 23 September.