CHICAGO, June 25 (Reuters) - Chicago Board of Trade corn futures ended higher on Thursday on a key reversal, after the front five CBOT corn contracts set fresh lows on the day, as traders began adding weather risk back into the market, analysts said.

• The National Weather Service is forecasting that temperatures could reach 100 degrees Fahrenheit this weekend as far north as the upper Midwest and as far east as the Carolinas.

• Hotter-than-normal weather is expected from the Plains to the Atlantic Coast from now through July 4, the NWS reported.

• CBOT's July corn contract CN26 ended the day up 7-3/4 cents at $4.14-3/4 a bushel. Earlier in the session, the July corn contract touched a low of $4.03-3/4 a bushel, which was the lowest price on a continuous chart of the most-active corn contract Cv1 since August 28, 2025.

• The December new-crop corn contract CZ26 ended up 8-1/4 cents at $4.43 a bushel.

• Stronger crude oil prices and a weaker U.S. dollar /.DXY also gave futures a boost. Corn futures often follow crude oil, as it is commonly used as feedstock for biofuel. O/R

• A weaker U.S. dollar can be bullish to U.S. exports, as it can make them less expensive for overseas buyers to purchase.

• Brazil's corn exports in 2025/26 are estimated at 37 million metric tons, down from 41.7 million tons in the previous cycle, Agroconsult reported on Thursday.

• Weekly U.S. corn export sales were 743,100 metric tons for 2025/26 for the week ended June 18, the U.S. Department of Agriculture said in its weekly report on Thursday. Analysts expected 600,000 to 1.3 million tons.