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Midwest Rains Delay Harvest, Pushing Corn and Wheat Futures Lower

By Markets Desk · 2026-09-17 · 2 min read
A combine harvester moving through a field of tall, golden grain stalks under a cloudy sky.
Illustration: Tradingbird

Heavy rainfall across the U.S. Midwest is slowing fieldwork, causing corn and wheat futures to decline as traders assess weather impacts on supply.

Corn futures fell more than 0.75% on Thursday as heavy rains stalled harvest operations across the U.S. Midwest. The weather event is the primary driver of price weakness, with December contracts dropping 3.75 cents to settle at $5.3050 per bushel. March corn contracts declined 4.25 cents to close at $5.4450 per bushel. These moves reflect immediate pressure from delayed fieldwork and increased supply expectations. Traders are focusing on the duration of the rain to gauge the impact on overall grain availability.

Forecasts predict 2 to 3 inches of rain will fall across the Dakotas through Ohio from Friday to Monday. This precipitation temporarily interrupts the harvest of corn and wheat. The timing coincides with the start of new crop deliveries to the market. Producers face challenges in moving grain to storage facilities. The delay creates a short-term bottleneck in the supply chain. However, drier conditions are expected from September 24 to 30, which may allow combines to resume work quickly.

Soybean Prices Remain Stable Amid Mixed Complex Activity

Soybean futures showed minimal movement compared to corn. January contracts slipped 0.25 cents to $13.37 per bushel. March contracts gained 0.50 cents to settle at $13.4575 per bushel. The stability suggests a balance between harvest pressure and demand. December soybean meal rose more than 1.5%, while soybean oil fell 0.75%. This divergence indicates specific product dynamics within the broader complex. Traders are weighing physical supply against export and domestic processing needs.

Export Shipments Outpace New Sales Orders

Weekly U.S. corn export sales totaled 40.4 million bushels. This figure is near the low end of market expectations, which ranged from 39.4 million to 78.7 million bushels. Physical shipments were significantly higher at 66.3 million bushels. Mexico, South Korea, Japan, Colombia, and Spain led the purchases. South Korea also bought 10.2 million bushels from optional origins. These shipments help absorb new crop supplies entering the market. The contrast between new sales and physical movements highlights execution efficiency in global trade.

Weather Outlook Shifts to Drier Conditions

The National Weather Service forecasts drier-than-normal conditions for the central United States from September 24 to 30. Above-normal temperatures will accompany these dry spells across the Midwest and Plains. This shift allows for the resumption of harvest activities. Combines can return to fields after the rain subsides. The duration of the delay will determine the scale of harvest pressure. A quick return to normal operations limits the impact on supply. Traders monitor these shifts to adjust positions in grain markets. The source data for these observations is GN auto markets/commodities: soybean futures.

Based on reporting by AgroLatam, compiled by the Tradingbird desk.

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