<div style='text-align:justify;'>Many parts of the world have four seasons in a year. They are spring, summer, autumn & winter. The weather is different during each season. As weather changes, plants change too and animals change their behavious to suit the weather. In spring, weather begins to get warmer and trees and other plants grow new leaves. Summer is the hottest season with long and usually sunny days. In the autumn the weather becomes mild and leaves starts falling from many types of trees. Winter is the coldest season, with short days. </div>
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{| class="wikitable"
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|+ Four season model
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! Northern hemisphere
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! Southern hemisphere
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! Start date
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! End date
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|-
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| Winter
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| Summer
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| 1<sup>st</sup> December
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| 28<sup>th</sup> February
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|-
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| Spring
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| Autumn
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| 1<sup>st</sup> March
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| 31<sup>st</sup> May
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|-
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| Summer
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| Winter
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| 1<sup>st</sup> June
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| 31<sup>th</sup> August
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|-
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| Autumn
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| Spring
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| 1<sup>st</sup> September
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| 30<sup>th</sup> November
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|-
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|}
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{| class="wikitable"
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|+ Indian Seasons model
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! Season
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! Months
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! Features
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|-
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| Winter
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| December – February
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| Coldest months, average temperature around 10-15 <sup>o<sup>C
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|-
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| Summer or Pre-monsoon
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| March - May
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| Hottest month is April in western and south region. In north region, May month is hottest. Temparature will be around 32-40<sup>o<sup>C
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|-
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| Monsoon or rainy
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| June to September
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| Dominated by humid, monsoon begins from north India and south India receives more rainfall
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|-
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| Post-monsoon or autumn
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| October – November
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| October and November are usually cloudless in north-west. Tamilnadu receives most of its annual precipitation in north-east monsoon season