India's Monsoon Falters Under El Niño: A 90% Forecast, a 20% Sowing Gap and a Sugar Export Ban

The world's most consequential weather system is underperforming. In an updated long-range forecast issued on 29 May 2026, the India Meteorological Department lowered its outlook for the southwest monsoon to 90% of the long-period average, with a model error of ±4% — below normal nationally, about 780 mm against a June–September norm of roughly 870 mm (the 1971–2020 LPA is 868.6 mm). Behind the headline number sits a much sharper probability shift: IMD puts the chance of a deficient season (below 90% of LPA) at 60%, against a climatological 16%, with 24% on below normal, 14% on normal, 2% on above normal and 0% on excess.

The revision itself is the story. IMD's first forecast of the season, on 13 April, had put the monsoon at 92% of LPA with a 35% chance of a deficient outcome. Six weeks later, as El Niño development became near-certain, the deficient-season probability had nearly doubled.

June behaved like the forecast feared. The month opened with a 40% rainfall deficit, making it India's fifth-driest June in a century — the product, analysts note, of El Niño, an unfavourable phase of the Madden–Julian Oscillation, and an absence of the low-pressure systems that normally seed the season.

The mechanism: a circulation robbed of its engine

The monsoon is a planetary-scale sea breeze, and El Niño saps it at the source. As the Pacific's warm pool and its ascending air shift east, the rising branch moves away from the Indian Ocean sector, weakening the whole monsoon circulation. Critically, El Niño suppresses the genesis of low-pressure systems over the Bay of Bengal — the depressions that track inland and deliver much of the season's rain to the core agricultural zone. Fewer depressions, less rain, delivered less far inland. In some years a positive Indian Ocean Dipole partially offsets the damage by warming the western Indian Ocean; in 2026 the IOD was forecast neutral during the monsoon, so no offset is expected. The wider physics is covered in the science of teleconnections.

The sowing gap: where deficit becomes food security

Rainfall statistics become food-security statistics through the kharif calendar. By mid-season, kharif sowing was running about 20% behind last year — roughly 35 million hectares planted against 44.3 million at the same point — with rice area down 0.9 million hectares to 6 million. The agriculture ministry has flagged around 200 districts for possible El Niño-linked stress. Sowing gaps can close if July–August rains recover; what cannot be recovered is yield lost to late planting and mid-season dry spells in rainfed districts. The FAO names India among the countries most exposed to agricultural drought in this event, warning specifically on rainfed rice and maize.

Policy is already moving: the sugar ban

New Delhi did not wait for the harvest numbers. India banned sugar exports with immediate effect until 30 September 2026, citing El Niño risk to future output alongside geopolitical uncertainty in West Asia. India is a top-tier sugar exporter, so the ban transmits the monsoon deficit straight into world prices — and it lands in a soft-commodity complex already stressed: drought covered more than half of Côte d'Ivoire and about two-thirds of Ghana as of late March 2026, driving cocoa to a 7½-year high; robusta coffee is concentrated in drought-exposed Vietnam and Indonesia; and rice closed up 9% amid an FAO/WFP scenario — a scenario range, not a forecast — of 20–50% output falls in affected regions. Watch for the classic sequel: export restrictions by one country raising prices, prompting restrictions elsewhere, as in 2023 with rice.

Historical calibration

El Niño years are the dominant cause of Indian drought years, but the mapping is not one-to-one: some strong events produced near-normal monsoons, and IMD's 27% normal-season probability keeps that door open. The sober reading of 2026: a below-normal season is the central case, a deficient one a serious risk, and a normal recovery still possible. What is different from a typical year is the direction and confidence of the tilt — NOAA gives a 97% chance the El Niño persists into early spring 2027 and an 81% chance it reaches very strong magnitude in October–December 2026, so the driver will not relent before the season ends.

What to watch and when

August is the make-or-break month: a strong MJO-assisted revival could still trim the deficit, while a weak August locks it in. Watch IMD's weekly all-India and subdivisional rainfall against the 90% forecast; the pace at which the sowing gap narrows before the window closes; reservoir levels heading into rabi (winter-crop) planting, which inherits whatever storage the monsoon leaves; and further trade measures on rice, wheat, sugar or onions. Beyond September, the story hands over to the rabi season and to food prices — and India's deficit is one panel of a continent-wide pattern that includes Indonesia's fire-season risk and the Mekong Delta's coming salinity squeeze. The monsoon's failure or recovery this August will be felt in food markets well into 2027.