Rio Grande do Sul's 2025/26 summer crops face water deficits after a sharp drop in rainfall since mid-November, slowing sowing. Soybean planting reached 74%, corn 89%, and bean sowing 60%, with corn suffering water stress during flowering and grain filling.
State soybean and corn cash prices rose modestly.
Drought-related yield reductions in Rio Grande do Sul, a major soybean and corn producing state, tighten regional supply and support prices, though the state's share of national output limits the overall impact.
After 1,079 past bullish weather events, Soybeans moved a median +0.3% over 5 sessions (54% higher; middle half -1.4% to +2.0%), and +0.9% over 20.
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.