
Above-normal temperatures and very little rain from late September through October let corn and soybean harvests advance quickly across most of the Corn Belt. Yields were highly variable, with parts of Iowa, Illinois and the eastern Corn Belt strong while southern Minnesota had some of its lowest yields in two decades.
Fast harvest progress and mixed yields leave the national crop roughly on track, so the price effect is mostly limited to regional supply differences.
After 445 past neutral weather events, Corn moved a median +0.1% over 5 sessions (52% higher; middle half -1.4% to +1.6%), and +0.7% over 20.
After 324 past neutral weather events, Soybeans moved a median +0.0% over 5 sessions (52% higher; middle half -1.4% to +1.7%), and +0.7% 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.