Commodities August 18, 2026 09:34 AM

USDA Downgrades Corn Crop Conditions; Chicago Futures Tick Higher

Weekly federal ratings slip and on-the-ground scouting point to weaker South Dakota prospects, lifting December CBOT corn prices modestly

By Avery Klein
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Corn futures on the Chicago Board of Trade rose modestly on Tuesday after the U.S. Department of Agriculture trimmed its weekly condition ratings for the national corn crop. The USDA reported 60% of the crop as good-to-excellent as of Sunday, a one percentage point decline from the prior week and the lowest reading for the 33rd week of the year since 2023. Annual scout reports also indicated South Dakota yields look weaker than both last year and the three-year average following a hot, dry summer.

USDA Downgrades Corn Crop Conditions; Chicago Futures Tick Higher
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Key Points

  • USDA weekly report showed 60% of the U.S. corn crop rated good-to-excellent as of Sunday, a one percentage point decline from the prior week.
  • The 60% good-to-excellent reading is the lowest for the 33rd week of the calendar year since 2023.
  • Scouts on an annual tour reported on Monday that South Dakota corn yield prospects are lower than last year and below the three-year average after a hot, dry summer.

The Chicago Board of Trade saw corn futures edge up on Tuesday after the U.S. Department of Agriculture released its weekly crop condition report on Monday that showed a slight decline in overall crop health.

According to the USDA, 60% of the U.S. corn crop was rated in good-to-excellent condition as of Sunday. That figure is down one percentage point from the previous week. The agency noted that this is the lowest good-to-excellent rating reported for the 33rd week of the calendar year since 2023.

Market participants reacted to the report with modest buying pressure. CBOT December corn was last reported up 2-3/4 cents at $4.92-1/4 per bushel, following intraday gains in the range of 2 to 3 cents per bushel earlier on Tuesday.

Additional field-level observations surfaced from scouts conducting an annual tour of major producing states. Those scouts reported on Monday that corn yield prospects in South Dakota are lower than those recorded for last year and are also below the three-year average. The scouts attributed the weaker prospects in South Dakota to a summer characterized by hot and dry conditions.

The combination of a reduced USDA condition rating and the scouts' on-the-ground findings contributed to the upward movement in futures prices, reflected in the December contract's gain.


Reporting note: The USDA condition rating cited reflects assessments as of Sunday and was published in the agency's weekly report released on Monday.

Risks

  • Further downgrades in USDA weekly condition ratings could pressure corn supplies and market sentiment - impacting agricultural commodity markets and grain traders.
  • Continued hot and dry weather affecting Midwestern producing states may worsen local yield prospects, with direct implications for regional producers and commodity prices.
  • On-the-ground scouting that finds yields below recent averages introduces uncertainty for end-users and processors that rely on predictable corn supply levels.

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