Hot Weather season:It is the period from March to Mid-june.During this period the sun moves northward and the temperature increases gradually.The sun shines overhead on equator on 21st March and on the tropic of cancer on 23rd june.
Cold Weather season:This is the period from mid-december to February.During this period a high pressure region develops in north-western India due to the southward movement of the sun.The average temperature of this region is about 10 degree.
Advancing Monsoon:The time of monsoon in India is from Mid-June to september and that of the retreating monsoon is from october to mid-december .They cause about 74% and 13% of the rainfall ,respectively.It takes place due to the pressure difference.
Retreat of Monsoon:It takes place due to the development of high pressure zone in north-western part of India,also due to the shifting of ITCZ.