The withdrawal of the monsoon begins in ______ states of India by early September.

The correct answer is north-western.Key PointsWithdrawal of monsoon

• The withdrawal of the monsoon begins in the north-western states of India by early September.
• By mid-October, it withdraws completely from the northern half of the peninsula.
• By early December, the monsoon has withdrawn from the rest of the country.
• The withdrawal, takes place progressively from north to south from the first week of December to the first week of January.
• By this time the rest of the country is already under the influence of the winter monsoon.
• The months of October and November are known for retreating monsoons.
• By the end of September, the southwest monsoon becomes weak as the low-pressure trough of the Ganga plain starts moving southward in response to the southward march of the sun.

Important Points

• Indian Monsoon-
  • The word ‘ monsoon’ is believed to have originated from the Arabic word for season.
  • India receives the bulk of its rainfall during the Southwest Monsoon season.
  • During the southwest monsoon period, the moisture Laden winds blow from sea to land.
  • Intense low-pressure formation over the Tibetan Plateau because of intense heating during the summer season; permanent high-pressure cell in the South of the Indian Ocean (East to Northeast of Madagascar in summer) is the main reason for Southwest Monsoon.
  • Southwest monsoon winds bring heavy rainfall to most parts of the country.
  • Factors influencing the onset of; monsoons
    • Intense low-pressure formation over the Tibetan Plateau
    • The permanent high-pressure cell in the South of the Indian Ocean
    • Subtropical jet stream
    • African Easterly jet (Tropical easterly jet)
    • Inter-Tropical Convergence Zone (ITCZ)