
The WMO's September 2, 2025 update says La Niña may emerge from September, with a 55% chance of La Niña-level Pacific cooling for September to November and about 60% for October to December. It also projects above-average temperatures for much of the world.
La Niña odds rising into the next crop year raise the risk of dryness in South America and the US southern Plains, which tends to support grain and oilseed prices over time.
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.
After 224 past neutral weather events, Wheat (SRW) moved a median -0.1% over 5 sessions (46% higher; middle half -1.4% to +1.5%), and +0.4% 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.