Heavy rain in early November left Iowa farmers with fewer than two suitable field-work days and slowed harvest. By November 8, 72% of corn acres had been harvested, compared with a five-year average of 89%, while soybean harvest was 93% complete and slightly behind its average pace.
Rain-delayed corn harvesting can temporarily constrain grain movement and increase harvest risk, offering slight near-term support to corn. Soybean harvest is close to completion, limiting the likely 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.