Weather drives rising corn prices

sun in corn field
(Metro Creative Services photo)

By Chaffin Mitchell | AccuWeather staff writer

The price of corn in the United States has been increasing this year and is now approaching record highs. As of May 10, The Wall Street Journal reported, corn prices were up 50%, with the cost of a bushel at $7.73, and prices were closing in on highs not seen since 2012, when drought decimated crops across the Midwest and sent prices soaring to $8.31 a bushel.

Like in 2012, the weather is a factor in the rising corn prices and, once again, drought is the primary trigger. However, it’s affecting farmers in Brazil rather than in the U.S.

Weather impacts

With rainfall amounts far below normal, the weather pattern in Brazil continues to stress corn crops, which are now in the critical pollination stage. Last November, AccuWeather experts warned that this year’s crop would be adversely impacted by the dry weather.

AccuWeather founder and chief executive officer Joel Myers sees the sharp increases in corn prices “as a result mainly of weather impacts.”

Myers said the current rise in prices dates back to August of last year, after U.S. corn farmers took a hit when a derecho caused widespread damage across Iowa, the nation’s top corn-producing state. AccuWeather estimated economic damages from the storm, which raked across a 770-mile swath of the heartland, to total $11.2 billion.

Myers said the derecho damage was just the beginning, since corn prices are influenced by what happens elsewhere around the world. Right now, what’s happening in Brazil is exacerbating the rise in prices.

“It looks like the corn production in Brazil could be as low as 25% less than it looked even a month ago because of this ongoing drought,” Myers said. “And there doesn’t look to be any end to that.”


Indeed, AccuWeather forecasters expect the dry conditions to persist in Brazil in the near term.

“Rainfall the next two weeks continues to look much below normal (25-50% of normal),” said Marshall Moss, AccuWeather vice president of forecasting.

AccuWeather meteorologists forecast the Brazilian corn production will produce 92 million metric tons; however, there is a 20% chance that number can be as low as 88-90 million metric tons.

“From what we can tell, this is at the lower end of other private estimates, but we feel confident in this number,” Moss explained.


What does this all mean for the American consumer?

“You’re going to notice, in the supermarket, an increase over the next three to four months, I think, of 15, 20, 25%,” Myers said.

He added that Americans being required to spend more on staples — as The Wall Street Journal noted, corn is used in the production of everything from Coca-Cola to tortilla chips and is an ingredient in gasoline — will mean household costs will rise.

“Same thing for gasoline and energy,” Myers continued. “The price of oil is up.”


In early May 2020, the price of crude oil was about $24 dollars a barrel. A year later, that number has risen to about $65 a barrel. And as Myers notes, the weather is just one of many things affecting the broader economy.

He worries that the weather woes affecting corn production could be part of what sends a ripple effect across the national and global economies — and the end result, he said, could be inflation.

Myers said that if inflation “gets out of control and the dollar continues to weaken against other currencies, [that] could really harm the standard of living in this country.”

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