
University of Illinois agronomists estimate the state's September corn yield at 222 bushels per acre, down 3 from August, and soybeans at 65 bushels, down 1. The declines reflect increasing dryness, which mainly affects late-planted crops, including double-crop soybeans.
A small downward revision to Illinois yields trims supply expectations modestly, though the crop remains near record levels and the impact is limited to late-planted fields.
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.