Chicago Board of Trade (CBOT) agricultural commodities closed mixed on Thursday, with U.S. corn futures touching their highest prices in more than a month on strong export demand.

Soybean futures also rose, extending a rebound from recent losses into a third consecutive session. Wheat futures bucked the firmer trend and set a one-week low.

The most active corn contract for December delivery went up 1.75 cents, or 0.48 percent to close at 3.6475 dollars per bushel. December wheat delivery dropped 4.5 cents, or 0.87 percent to close at 5.13 dollars per bushel. November soybean delivery went up 5 cents, or 0.59 percent to close at 8.55 dollars per bushel.

CBOT brokers reported that funds were sellers of 3,100 contracts of wheat, buying 2,900 contracts of soybeans and 4,200 contracts of corn.

As for weather forecast for agricultural crop, more rain is on the way for parts of eastern Iowa where flooding is already a problem. Several rivers and streams in the state are already over their banks, and another round of thunderstorms may kick off starting this weekend, according to the National Weather Service.