
Climatempo data show October 2026 rainfall was above average across all monitored regions of Goiás, Mato Grosso do Sul and Paraná, and below average in more than half of Rio Grande do Sul's regions and in western and northwestern Mato Grosso. CONAB reported Mato Grosso had 91% of its soybean area planted by 30 October, while Rio Grande do Sul had 11%.
Adequate moisture in the central-west and south-central soybean belt supports early planting and reduces replanting risk, which is bearish for soybean meal prices if it confirms a large crop. Dry spells in Rio Grande do Sul are a minor watch point for the southern crop.
After 363 past bearish weather events, SOY moved a median -0.6% over 5 sessions (42% higher; middle half -2.5% to +1.1%), and -0.2% over 20.
After 55 past neutral weather events, SBM moved a median -0.1% over 5 sessions (47% higher; middle half -1.7% to +1.5%), and +0.1% 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.