Chicago wheat futures rose to a nine-month high on Friday, buoyed by frost damage to crops in top exporter Russia, while corn and soybean prices also edged higher as traders awaited a monthly government supply-and-demand report due later in the day.

Russian wheat regions hit by frosts this month will re-sow crops that were killed by the cold, state news agency TASS quoted the agriculture ministry as saying on Thursday.

"This means that considerable frost damage is likely to occur," Commerzbank said in a note, adding the general weather situation for wheat, corn and soybeans remained challenging.

Chicago Board of Trade July wheat was up 12-3/4 cents at $6.50-1/4 a bushel as of 10:00 a.m. CDT (1500 GMT), after climbing to a nine-month peak of $6.60, the highest point for a most-active contract since Aug. 8.

Dealers said there were also concerns about wheat crops in the European Union.

Some 64% of French soft wheat was rated as in good or excellent condition by May 6, down from 94% a year ago, farm office FranceAgriMer said.

The rating was the lowest for the time of year since 2020.

July corn gained 4-1/4 cents to $4.60-3/4 a bushel, while July soybeans rose 3-1/4 cents to $12.11-3/4 a bushel.

The monthly U.S. Department of Agriculture report, due at 11:00 a.m. CDT, is expected to show rising U.S. and global supplies of both crops in the coming year.

Worries about crop damage due to floods in Brazil's Rio Grande do Sul state, and strikes at grain ports and crushing plants in Argentina also supported corn and soy, analysts said.

(Additional reporting by Nigel Hunt in London and Mei Mei Chu in Beijing; Editing by Marguerita Choy)