# South America weather concerns could spark corn, soybean rally - Brownfield Ag News

> A CoBank analyst says dry conditions are developing in northern South America while the south is expected to turn very wet under a strong El Niño. Delays to planting and later harvesting are possible, extending into January to March. The analyst says the strength of any rally will depend on how widespread the delays become and on export demand.

- Date: 2026-11-03 · published 2026-11-03T18:59:12.190Z
- Category: weather · region South America · magnitude medium
- Page: https://feedsoft.ai/events/78341-south-america-weather-concerns-could-spark-corn-soybean-rally-brownfield-ag-news
- Commodities: [Corn](https://feedsoft.ai/c/CORN.md), [Soybeans](https://feedsoft.ai/c/SOY.md)

## Why it matters

Expected planting and harvest delays in Brazil and Argentina could tighten 2027 corn and soybean supplies and lift prices. The outlook is conditional, so the effect is a possible rally rather than a confirmed one.

## Read by commodity

- SOY: bullish ▲
- CORN: bullish ▲

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| CORN | 2017-06-07 | [Corn, soybeans higher on weather concerns - Brownfield Ag News](https://feedsoft.ai/events/70428-corn-soybeans-higher-on-weather-concerns-brownfield-ag-news.md) | +0.6% | +1.5% |
| CORN | 2017-07-14 | [Soybeans, corn supported by renewed weather concerns - Brownfield Ag News](https://feedsoft.ai/events/69796-soybeans-corn-supported-by-renewed-weather-concerns-brownfield-ag-news.md) | +5.3% | -1.2% |
| CORN | 2022-07-28 | [Soybeans continue to climb on weather concerns - Brownfield Ag News](https://feedsoft.ai/events/8747-soybeans-continue-to-climb-on-weather-concerns-brownfield-ag-news.md) | +2.4% | +3.2% |
| CORN | 2026-02-06 | [South American weather, quality issues could extend rally in grain markets - Brownfield Ag News](https://feedsoft.ai/events/20643-south-american-weather-quality-issues-could-extend-rally-in-grain-markets.md) | -0.7% | +1.6% |
| CORN | 2020-07-02 | [Soybeans, corn extend rally - Brownfield Ag News](https://feedsoft.ai/events/12774-soybeans-corn-extend-rally-brownfield-ag-news.md) | +0.9% | -6.0% |
| SOY | 2017-06-07 | [Corn, soybeans higher on weather concerns - Brownfield Ag News](https://feedsoft.ai/events/70428-corn-soybeans-higher-on-weather-concerns-brownfield-ag-news.md) | +1.0% | +5.7% |
| SOY | 2017-07-14 | [Soybeans, corn supported by renewed weather concerns - Brownfield Ag News](https://feedsoft.ai/events/69796-soybeans-corn-supported-by-renewed-weather-concerns-brownfield-ag-news.md) | +4.2% | -4.3% |
| SOY | 2022-07-28 | [Soybeans continue to climb on weather concerns - Brownfield Ag News](https://feedsoft.ai/events/8747-soybeans-continue-to-climb-on-weather-concerns-brownfield-ag-news.md) | +0.4% | -3.5% |

## Sources

- brownfieldagnews.com: https://brownfieldagnews.com/news/south-america-weather-concerns-could-spark-corn-soybean-rally/

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.