As days with extreme heat coupled with drought conditions have dominated the weather statewide in recent weeks, growers have begun to ask themselves just how hot is too hot for corn and soybeans?

While corn originated as a tropical grass and can tolerate exposures to temperature extremes as high as 112 degrees for brief periods, the optimal daytime temperatures for corn typically range between 77 degrees and 91 degrees, said Peter Thomison, an Ohio State University Extension agronomist.

When temperatures rise above 95 degrees, corn growth decreases, he said.