Harvest in northern Illinois finished quickly, with corn yields slightly below average and soybean yields around average, according to farmer and agronomist Abigail Peterson. High heat during corn pollination likely limited yields, while late-season storms caused some soybean lodging; statewide harvest progress was ahead of the five-year average for both crops.
Slightly lower local corn yields could modestly tighten nearby supply, while average soybean yields and rapid harvest progress limit broader supply concerns. The price impact is likely limited because the reported results are localized and broadly average.
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.
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.