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Analysts attribute part of the below-expected 2025 U.S. corn yields to cloudy, humid midsummer weather that reduced solar radiation during grain fill. York County, Nebraska, fields that typically exceed 240 bushels per acre averaged about 180, a 25% drop, with fewer sunlight days in July.
Lower-than-expected yields from reduced solar radiation tighten the corn supply outlook, which supports corn prices.
After 1,465 past bullish weather events, Corn moved a median +0.2% over 5 sessions (54% higher; middle half -1.4% to +1.9%), and +0.9% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.