Planting progress was about 17% complete, slightly behind the five-year average of 27%, with rain events forecast to slow fieldwork. Allendale noted growers typically see a small yield drag if planting runs past May 10.
Traders are also watching U.S.-China and NAFTA trade talks.
Planting delays raise modest risk to yield expectations, which can support corn prices if wet weather persists. Trade developments add upside optimism for the market.
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.
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.