
Illinois's geography, with navigable rivers and Gulf moisture, makes it well suited to corn and soybean production, according to an atmospheric scientist speaking to Illinois farm managers. Weather is identified as the biggest source of yield loss each year.
Yield potential varies widely across U.S. counties.
The commentary restates the structural weather risk to corn yields without a new supply event, so it has little direct price impact.
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.
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.