# How Extreme Heat Can Affect Corn Yield

> DTN explains that corn yields decline when temperatures exceed 86 F and that heat above 95 F can reduce pollen production. Heat can also reduce pollen drop in humid conditions and intensify water stress after pollination. Forecasts called for temperatures 10 to 15 F above average in the final week of July.

- Date: 2023-07-27 · published 2023-07-27T12:00:00.000Z
- Category: weather · region US · magnitude low
- Page: https://feedsoft.ai/events/13265-how-extreme-heat-can-affect-corn-yield
- Commodities: [Corn](https://feedsoft.ai/c/CORN.md)

## Why it matters

Heat-related yield risk during pollination supports corn prices while the forecast heat persists.

## Read by commodity

- CORN: bullish ▲

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| CORN | 2025-06-23 | [How Will the Early-Summer Heat Wave Affect Corn?](https://feedsoft.ai/events/13082-how-will-the-early-summer-heat-wave-affect-corn.md) | -1.5% | -3.7% |
| CORN | 2021-07-23 | [How record heat could affect the U.S. corn and soybean markets - DTN](https://feedsoft.ai/events/45915-how-record-heat-could-affect-the-u-s-corn-and-soybean-markets-dtn.md) | -1.1% | -2.6% |
| CORN | 2025-06-01 | [Effects of Heat Stress on Corn](https://feedsoft.ai/events/13092-effects-of-heat-stress-on-corn.md) | +0.5% | -2.2% |
| CORN | 2024-11-13 | [Weather Extremes and Variability in Corn Yield \| Crop Science US](https://feedsoft.ai/events/13137-weather-extremes-and-variability-in-corn-yield-crop-science-us.md) | -0.5% | +1.0% |
| CORN | 2020-07-21 | [Heat stresses corn](https://feedsoft.ai/events/51956-heat-stresses-corn.md) | -0.3% | +2.6% |

## Sources

- dtnpf.com: https://www.dtnpf.com/agriculture/web/ag/blogs/ag-weather-forum/blog-post/2023/07/27/extreme-heat-can-affect-corn-yield

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