Retreating monsoon is the withdrawal phase of the southwest monsoon, when the rainy season gradually ends and the monsoon winds start pulling back from India, mainly during October and November.

What Is Retreating Monsoon? (Quick Scoop)

Simple definition

  • Retreating monsoon = the period when the southwest monsoon weakens and begins to withdraw from North and Central India toward the end of the rainy season.
  • It usually starts around mid-September and continues through October–November, finally ending by about early January in some regions.

You can think of it as the “goodbye phase” of the monsoon, when the same system that brought months of rain slowly exits the subcontinent.

Key features of retreating monsoon

  • Begins when southwest monsoon winds over North India weaken and the low-pressure zone shifts southward.
  • Skies gradually clear, clouds thin out, and humidity drops in many areas.
  • Daytime heat can actually feel intense again in the northern plains because there are fewer clouds to block the sun.
  • Rainfall becomes patchy and reduces over most of India, but some southeastern coastal areas (like Tamil Nadu and coastal Andhra Pradesh) still receive significant rain from cyclonic systems over the Bay of Bengal.
  • The withdrawal is slow: it can take about three months from the first signs in northwest India to the final exit from the far south and southeast coast.

Time period and regions affected

  • Starts: mid-September, with retreat from western Rajasthan and northwest India.
  • Main retreating monsoon months: October–November (these months are specifically known for retreating monsoon in textbooks and exams).
  • Ends: by December–early January over the far south and southeast coast (including the Coromandel Coast).

During this phase, monsoon withdrawal lines are periodically announced by the meteorological department as the rain belt recedes step by step from northwest to southeast India.

Weather during retreating monsoon

  • Northern and central India:
    • Clearer skies, lower humidity, hot days and cooler nights.
* Rains mostly stop except for occasional systems.
  • Southern and southeastern India:
    • Get important rainfall from retreating monsoon, especially due to low-pressure systems and cyclones over the Bay of Bengal.
* States like Tamil Nadu, Puducherry, and coastal Andhra Pradesh receive a big share of their annual rain in this season.

Why it matters today (latest context)

  • Recent years have seen delayed monsoon withdrawal from many cities (for example, Mumbai and parts of northwest and central India), often linked to cyclones or weather systems in the Arabian Sea or Bay of Bengal.
  • Meteorological updates closely track the “withdrawal line” because it affects:
    • End of main kharif (rain-fed) crop season.
    • Planning of rabi sowing (like wheat and mustard) as cooler, drier weather sets in.
    • Cyclone risk over the Bay of Bengal in October–November.

Forum and exam-style angle

On study and exam forums, “what is retreating monsoon” is a classic geography question, especially for Class 9–11 and civil services preparation.

Typical points people emphasize:

  1. Months: mainly October–November, starting from mid‑September withdrawal.
  1. It is the withdrawal of the southwest monsoon from India, not a new monsoon.
  1. Marked by clear skies and rising day temperatures in north India.
  1. Important rains for Tamil Nadu and nearby coastal areas due to cyclones and depressions over the Bay of Bengal.

If you need a one-line exam answer:
“Retreating monsoon is the season of withdrawal of the southwest monsoon from mid‑September to November, marked by weakening rains over most of India and significant post-monsoon showers over southeast coastal regions.”

TL;DR: Retreating monsoon is the late-season phase (mainly October–November) when the southwest monsoon winds and rains gradually withdraw from India, bringing clearer skies to most regions but important rains—often from cyclones—to the southeast coast.

Information gathered from public forums or data available on the internet and portrayed here.