
Excessive spring rains delayed Corn Belt planting, with Illinois reaching only 50% planted by early June versus over a month earlier in a typical year. USDA re-surveyed 14 states in July after unusually many unplanted acres appeared in the June survey.
Planting delays raise the risk of lower yields and shaped trade expectations for higher prices, though the historical link between late planting and yield is inconsistent.
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.