CBOT December corn settled up 3/4 cent at $3.57-1/2 per bushel.
Analysts surveyed by Reuters expect the government on Tuesday to trim its estimates of the US 2017 corn yield and 2017/18 US corn ending stocks.
Ahead of the USDA's weekly crop progress report due later on Monday, analysts surveyed by Reuters expected the government to report the US corn harvest as 4 percent complete.
Freeze risks seen low in the US Midwest as the corn harvest gets under way.
The USDA reported export inspections of US corn in the latest week at 662,173 tonnes, below a range of trade expectations for 700,000 to 900,000 tonnes.
The CBOT reported two deliveries against CBOT September corn futures contract, which expires on Thursday.
Copyright Reuters, 2017