Environment & Climate

IMD Tracks Withdrawal of Southwest Monsoon Amid Regional Deficit

20 September 2026UPSCSSCRailway

In Brief

Southwest Monsoon retreat begins from Northwest India as 43% of meteorological sub-divisions record rainfall deficit.

The India Meteorological Department (IMD) announced the official commencement of the Southwest Monsoon withdrawal from parts of northwest India. Concurrently, IMD data revealed that despite seasonal progression, nearly 43% of the country's meteorological sub-divisions continue to experience significant rainfall deficits at the end of the monsoon cycle.

The Southwest Monsoon typically advances across India between June and July, accounting for over 70% of the country's annual rainfall. The process of withdrawal begins when specific meteorological conditions are met, marking the transition toward the post-monsoon season and the eventual arrival of the Northeast Monsoon.

Understanding monsoon dynamics is vital for assessing agricultural productivity, water reservoir levels, and macro-economic stability in India. This topic directly connects to UPSC GS Paper I (Physical Geography - Monsoon systems) and GS Paper III (Agriculture & Irrigation), frequently tested via analytical MCQs.

UPSC Study NotesHIGHGS1 — Physical Geography & Monsoon Systems; GS3 — Agriculture, Irrigation & Food Security

GS1 — Physical Geography & Monsoon Systems; GS3 — Agriculture, Irrigation & Food Security

📌 Exam Angle

UPSC frequently tests monsoon withdrawal criteria and its implications via Prelims MCQs asking "which conditions trigger monsoon withdrawal?" Mains can demand an essay on "How monsoon deficit impacts agricultural output and water resource management in India" with specific data integration.

⚠️ Key Concerns

43% rainfall deficit across meteorological sub-divisions threatens kharif crop productivity and groundwater recharge, critical given India's agricultural dependence. Uneven spatial distribution of monsoon creates regional drought risk, complicating food security and necessitating inter-state water management frameworks that often face political friction.

💡 Why It Matters

Monsoon dynamics directly determine agricultural yields, reservoir levels, and rural livelihood stability—fundamental to India's food security and economic growth. Tracking withdrawal patterns enables policy intervention in irrigation scheduling and drought preparedness, essential for governance resilience.

🔑 Must Remember

• Southwest Monsoon accounts for 70%+ of annual rainfall; withdrawal signals transition to post-monsoon season • Three mandatory IMD criteria: 5-day rainfall cessation, anti-cyclonic circulation in lower troposphere, moisture reduction • 43% sub-divisions with deficit creates uneven agricultural risk across regions

📝 Key Terms

Southwest Monsoon withdrawalmeteorological sub-divisionsrainfall deficitanti-cyclonic circulationkharif productivitywater resource managementIMD criteriaagricultural vulnerability

IMD Tracks Withdrawal of Southwest Monsoon Amid Regional Deficit

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