Seasonal grain marketing windows for U.S. corn and soybeans have shifted again in 2026, with January emerging as a critical pricing month, according to long-term market analysis published Feb. 13. The changes matter because export competition from Brazil and Argentina is altering price trends, forcing U.S. farmers to adjust risk management strategies amid volatile commodity prices and tightening margins.

For decades, seasonal marketing helped producers improve average annual selling prices by targeting historically strong months and avoiding harvest lows. But structural changes in global production, combined with faster-moving futures markets, are reshaping those traditional windows.

Historically, corn prices tended to peak in July and bottom in September. Soybeans often topped in May and hit seasonal lows in October. Wheat highs came in November, with harvest lows in July. From the 1980s through the early 2000s, these patterns held more than 80% of the time.

Around 2008, the trend shifted. Corn highs began appearing more frequently in May, while soybeans rallied earlier, often in March or April. Analysts attributed the change to improved on-farm storage and more disciplined marketing. In the 1980s, nearly 45% of soybeans were sold directly off the combine, pressuring October prices. Expanded bin capacity and better use of forward contracts reduced that harvest pressure.

Since 2020, another transformation has taken hold - driven largely by explosive growth in South American production.

Argentina's corn output has climbed from roughly 800 million bushels two decades ago to 1.967 billion bushels in 2025. Brazil's expansion has been even more dramatic. Brazilian corn production increased from 2.2 billion bushels 20 years ago to more than 5 billion bushels in 2025.

In soybeans, Brazil's rise is historic. Production surged from 2.3 billion bushels two decades ago to an estimated 6.2 billion bushels in 2025 - nearly 1.9 billion bushels more than the United States. Argentine soybean production also increased, from 1.6 to 1.78 billion bushels.

This shift has altered export flows and supply chain dynamics. The seasonal "harvest low" U.S. farmers must now avoid increasingly coincides with the South American harvest in March and April, when global supplies flood the market and pressure futures.

New Selling Time Frames for 2026

Based on recent trends:

For corn, the strongest pricing windows now tend to occur in January and April, while seasonal lows are more common in July and August.

For soybeans, highs frequently appear in November and January, with caution warranted during March and April, when Brazilian exports peak.

Wheat markets, pressured by expanded production in the European Union, Russia, Ukraine, and Kazakhstan, generally offer better selling opportunities between November and February, with July still representing a seasonal risk during Northern Hemisphere harvest.

Another key development is the emergence of double tops, creating two selling opportunities rather than one. However, rallies are often shorter in duration, requiring faster execution. Markets now spend extended periods in sideways trading channels rather than long, steady trends.

Implications for Farm Risk Management

For U.S. producers navigating lower commodity prices, elevated input costs, and uncertain yields amid drought concerns, timing matters more than ever. January has become a pivotal month for both corn and soybeans. If prices rally into January, it may signal a strategic selling window. Conversely, weakness into January can set up potential buying or re-ownership opportunities.

The evolution underscores the growing efficiency of global grain futures markets. Instant access to market news, export data, and weather developments accelerates price discovery. In this environment, "hold and hope" is not a marketing strategy.

Seasonal marketing remains a valuable tool - but only when paired with disciplined hedging, crop insurance coverage, storage management, and a written marketing plan. As South America reshapes global grain flows, U.S. farmers must adapt their strategies to protect margins and remain competitive in the world marketplace.