
Iowa State extension notes that a late, uneven season has produced a wide range of corn maturity, with test weights expected at 54-55 lb/bu against a long-term average of 56-58. Frost is expected in northern Iowa between October 11 and 13.
Lighter test weights raise handling, storage and drying costs and mean the lightest grain should be sold first, which adds quality-driven variability to corn supplies.
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.