Corn price had its biggest one-day increase in four months on forecasts of dry weather for the US Midwest.
December corn rose 22 cents, or 4.7 per cent, to US$4.85 a bushel Monday, the biggest one-day spike since April 29.
The forecast for drier weather has helped corn prices rebound from their lowest level in almost three years. Corn has slumped this year after the government said in the spring that growers intended to plant the most corn in almost 80 years.
"We're starting this week with a pretty dry forecast," said Todd Hultman, a grains analyst at DTN.
"So there are increasing concerns, especially in the western and northern Corn Belt, about dry conditions."
Wheat and soybeans also rose. December wheat gained 10 cents, or 1.6 per cent, to US$6.54 a bushel. Soybeans rose 44 cents, or 3.5 per cent, to US$13.03 a bushel.
Corn has been one of the biggest decliners among agriculture products this year, dropping 31 percent since the start of the year. The price of wheat has fallen 16 percent and soybeans have dropped 8.3 per cent.
US corn growers are forecast to produce a record crop of 13.8 billion bushels of corn this year, an increase of 28 per cent from last year's drought-hit crop, the US Department of Agriculture said on August 12.