* Soybeans pushed higher by South American weather
* Weak U.S. dollar adds support
* U.S. wheat export inspections below expectations
CHICAGO, Nov 6 (Reuters) - Chicago soybean futures hit their highest level in some eight weeks on Monday on weather concerns in top exporter Brazil and arid conditions in Argentina.
Corn and wheat prices both rose sightly as weakness in the U.S dollar added support to the markets.
Traders were monitoring uneven crop weather in Brazil, where soybean planting is under way. Dryness is a concern in leading soy-producing state Mato Grosso, while excessive rains have drenched southern areas.
"There is talk that this could be detrimental to the crop. I think it is kind of early," said Joe Vaclavik, president of Standard Grain brokerage. "Argentina is still dry, although improving. So I guess that the market perhaps is just adding some South American weather premium."
He added that soybean futures may be on the rise after firms in China, the world's biggest importer of the oilseed, discussed larger imports last week.
The U.S. Department of Agriculture reported a sale of 126,000 tons of soybeans to China on Monday. That amounted to "less than routine business," Vaclavik said, noting that U.S. sales to China are well off last year's pace.
The weaker dollar makes U.S. supplies cheaper in world markets.
Chicago Board of Trade most-active soybeans rose 1.1% to $13.67-1/4 a bushel by 1830 GMT, after earlier on Monday hitting their highest since Sept. 12 at $13.69-3/4 a bushel.
Corn rose 0.4% to $4.79-1/4 a bushel while wheat climbed to 0.7% to $5.76-1/2 a bushel.
Gains in corn are limited by low demand and the prospect of higher U.S. yields that the USDA's November supply/demand and crop production reports may show on Thursday, analysts said.
The USDA reported on Monday that exporters sold 289,575 tons of U.S. corn to Mexico. Separately, the USDA reported weekly U.S. wheat export inspections that were below expectations. (Reporting by Brendan O'Brien in Chicago; Editing by Sharon Singleton)
