
As of October 31, 81% of the Illinois corn crop and 75% of soybeans had been harvested. Heavy late-October rain of 6 to 10 inches slowed harvest to a crawl, and some fields were rutted or lodged.
Harvest is expected to resume as drier weather returns.
Delayed harvest slows grain movement to market and adds short-term logistics friction, but yield losses appear limited, so the price effect is modest.
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.