The front-month MGEX contract, which has gained 7.6%during the winning streak, hit its highest since July 15.
Winter wheat futures were weaker, pressured by good soil moisture levels in key growing areas as well as light demand on the export market.
Corn futures were slightly higher on technical buying but better-than-expected crop conditions kept the gains in check.
Soybeans rose on renewed optimism about Chinese demand for US supplies of the oilseed. At 10:55 a.m. CDT (1555 GMT), Chicago Board of Trade November soybean futures were up 4-1/2 cents at $8.97 a bushel.
CBOT December corn was up 1-1/4 cents at $3.74-1/2 a bushel, recovering from early weakness after finding support at its 10-day moving average.
The weekly crop progress report from the US Department of Agriculture (USDA) after the market close on Monday said 57% of US corn crops were in good-to-excellent condition, up from 55% last week and market expectations also of 55%.
The Commodity Weather Group said a frost was possible late next week in the northern Plains and northwest Midwest, posing a "limited threat" to 10% to 15% of corn and soybean crops. MGEX spring wheat for December delivery was 8-1/2 cents higher at $5.45-3/4 a bushel. Chicago Board of Trade December soft red winter wheat was down 1-1/2 cents at $4.82 a bushel and K.C. December hard red winter wheat was 1/2 cent lower at $4.06 a bushel.
The USDA said 22% of US winter wheat had been planted, up sharply from 8% last week. Some 87% of US spring wheat was harvested, topping market expectations.