After a 2025 that defied nearly every long-range weather forecast, 2026 is shaping up with a different climate story-and new signals that U.S. farmers should not ignore. A rapid transition from La Niña to ENSO-neutral conditions is now expected by early spring, with a growing likelihood that El Niño will emerge later in the year.

Experts say there's a 75% chance La Niña will fade by March, with neutral conditions likely to persist through late spring. As ocean temperatures shift, spring planting windows and moisture availability across the Corn Belt and southern Plains may look significantly different than last year's soggy, disease-prone start.

Why It Matters: In 2025, forecasters predicted widespread drought, but farmers faced the opposite: heavy rainfall, flash flooding, and a wave of crop diseases. Southern rust and tar spot hit hard across the Midwest, punishing fields where fungicide protection lagged. The takeaway: weather models can shift fast, and adaptability is crucial.

As 2026 begins, early analog years like 2009 and 2018 offer some optimism. Both were solid crop years in the Midwest, supported by timely moisture and minimal extremes. But confidence in this year's outcome will hinge on how spring storm tracks develop.

If storms cluster along the Mississippi, Ohio, and Tennessee River Valleys, the risk of summer drought in the Midwest drops considerably. But if early-season weather systems shift west, drought risk for the Plains and western Corn Belt may rise again.

Meanwhile, global signals remain equally important. In South America, vegetation health indicators currently show minimal stress in Brazil and Argentina, though analysts continue to monitor planting progress and rainfall. The timing of Brazil's safrinha corn crop, and whether late moisture stress emerges, could inject new volatility into grain markets-right as U.S. planting ramps up.

ENSO transitions-from La Niña to El Niño-carry powerful implications:

La Niña typically brings:

• Cooler, wetter weather across the northern U.S.

• Warm, dry conditions in the South

• Drought risk in the Delta and South America

El Niño tends to bring:

• Wetter, milder winters across the southern U.S.

• Reduced drought risk in the Midwest

• Increased rainfall in key South American growing regions

A faster-than-normal transition could mean better early planting conditions for U.S. producers, but it also comes with uncertainty. Disease pressure may return if warm, wet conditions persist. And as always, weather's influence on commodity markets is global, not just local.

Experts stress the importance of watching the right indicators-especially storm patterns and ocean temperatures in the Gulf of Alaska and Pacific. The exact moment La Niña fades and El Niño emerges could reshape crop outcomes and pricing for the entire year.

2026 may not repeat 2025's chaos, but it brings its own risks-and opportunities. Knowing what to track, and when, will give farmers the edge in a year of transition.