# Impact of Rain and Drought on December Grain Prices

> Heavy rain across most of Brazil has improved soybean and corn crop conditions, and analysts are raising yield forecasts. Argentina's central and southern regions are dry and hot, which raises stress on corn and soybean crops ahead of the pod-filling stage.

- Date: 2025-12-30 · published 2025-12-30T12:00:00.000Z
- Category: weather · region South America · magnitude medium
- Page: https://feedsoft.ai/events/13822-impact-of-rain-and-drought-on-december-grain-prices
- Commodities: [Soybeans](https://feedsoft.ai/c/SOY.md), [Corn](https://feedsoft.ai/c/CORN.md)

## Why it matters

Favorable Brazilian moisture points to larger South American supplies, which weighs on prices, while Argentine dryness adds yield risk that partly offsets that pressure.

## Read by commodity

- SOY: neutral
- CORN: neutral

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| SOY | 2018-02-07 | [Grain prices: a week of downward movements -  Premium](https://feedsoft.ai/events/66560-grain-prices-a-week-of-downward-movements-premium.md) | +2.6% | +7.0% |
| SOY | 2017-08-24 | [Perfect Storm Drought Conditions: Price, Yield and Drought Updates](https://feedsoft.ai/events/69301-perfect-storm-drought-conditions-price-yield-and-drought-updates.md) | -1.3% | +3.8% |
| SOY | 2022-10-23 | [Conab study analyzes the impact of rain on wheat crops - Revista Cultivar](https://feedsoft.ai/events/13697-conab-study-analyzes-the-impact-of-rain-on-wheat-crops-revista-cultivar.md) | -0.6% | +2.3% |
| SOY | 2019-10-01 | [Argentina Crops Being Impacted by Drought Conditions - ProAg](https://feedsoft.ai/events/56410-argentina-crops-being-impacted-by-drought-conditions-proag.md) | +1.0% | +1.6% |
| SOY | 2025-12-29 | [Good rainfall in Brazil and dry weather in Argentina will be the main factors influencing prices in the coming weeks](https://feedsoft.ai/events/13823-good-rainfall-in-brazil-and-dry-weather-in-argentina-will-be-the-main-factors.md) | -1.1% | +0.8% |
| CORN | 2021-11-04 | [US oat prices soar as supply dips due to drought, demand \| World Grain](https://feedsoft.ai/events/44107-us-oat-prices-soar-as-supply-dips-due-to-drought-demand-world-grain.md) | +3.7% | +0.1% |
| CORN | 2017-07-11 | [ABN Amro: Grain prices higher due to US drought • De Molenaar](https://feedsoft.ai/events/70017-abn-amro-grain-prices-higher-due-to-us-drought-de-molenaar.md) | -4.3% | -4.6% |
| CORN | 2026-03-31 | [Wheat Prices Surge on US Drought and Planting Uncertainty](https://feedsoft.ai/events/20207-wheat-prices-surge-on-us-drought-and-planting-uncertainty.md) | -1.0% | +1.7% |

## Sources

- agroreview.com: https://agroreview.com/en/newsen/crops/rain-brazil-and-drought-argentina/

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