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Solutions
Key Points:
Retreating monsoons:
- During October-November, with the apparent movement of the sun towards the south, the monsoon trough or the low-pressure trough over the northern plains becomes weaker.
- This is gradually replaced by a high-pressure system.
- The south-west monsoon winds weaken and start withdrawing gradually.
- By the beginning of October, the monsoon withdraws from the Northern Plains.
- The months of October-November form a period of transition from hot rainy season to dry winter conditions.
- The retreat of the monsoon is marked by clear skies and a rise in temperature.
- While day temperatures are high, nights are cool and pleasant.

Thus, October-November months are associated with retreating monsoons/the transition season.
Additional Information
Southwest monsoon season:
- The period June to September is referred to as the 'Southwest Monsoon' period.
- The Southwest Monsoon period is the principal rainy season for the Indian subcontinent.
- This is the summer monsoon period where the southwest monsoon holds away over the country.
- The whole country receives nearly 75% of its rainfall during this period.
Monsoon:
- Monsoon, a major wind system that seasonally reverses its direction, such as one that blows for approximately six months from the northeast and six months from the southwest.
- The primary cause of monsoons lies in different warming trends over land and sea, though other factors may be involved.
- There are two monsoons (or rainy seasons) in India.
- The summer monsoon season in India, otherwise known as the southwest monsoon, lasts from June to September and affects the whole of India.
- Then the northeast or winter monsoon brings seasonal rainfall to Southeast India from October to December.