Overview of the breaks and progress in the 2025 Indian monsoon:
🟢 1. Post-onset stall in early June
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The monsoon arrived early (May 24 in Kerala; reached Mumbai by May 26), but then paused around May 29 – particularly over Maharashtra and North Bengal – causing a ~25 % rainfall deficit during June 1–8.
🔵 2. Two-week lull till mid-June
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After stalling at the Maharashtra coast, the monsoon remained stalled for nearly 13 days. According to IMD, it only resumed northward progress around June 12–15, bringing heavy rains back to Karnataka, Konkan & Goa.
🌧️ 3. Regional variability continues
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Even after the revival, progress into Central India, Delhi, Haryana, UP, and Northeast remained uneven, with some areas still experiencing delays or patchy rains .
Context & Causes
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Early monsoon onset and intense Western Disturbances in May 2025 (5–7 events vs. 1–2 usual) sped up initial rains but didn’t support steady northward movement .
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Delayed progression was linked to weak Bay of Bengal branch, dominance of the Arabian Sea branch, and neutral ENSO/IOD conditions—meaning favorable for rain quantity overall, but not consistent spread.
🗓️ Summary Table
Phase | Dates (approx.) | What happened |
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Early onset | May 24 – 26 | Kerala → Mumbai movement faster than usual |
Pause | ~May 29 – June 11 | Monsoon stalled in Maharashtra & North Bengal |
Revival | June 12 – 15 | Resumed northward spread with heavy rainfall in southwest |
Ongoing uneven spread | Mid-June onward | Patchy or delayed in Delhi, central India, Northeast |
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