A University of Illinois study projects that field working days in Illinois will decline under climate change scenarios, splitting the corn planting window into an early and a late period. Both windows carry increased risk from frost, heavy rain, or late-summer drought.
Greater planting and yield risk in the Corn Belt over the long term supports a higher risk premium for corn, but the study is a long-range projection with no immediate supply impact.
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.