CHICAGO, June 26 (Reuters) - Chicago Mercantile Exchange live cattle futures ended flat to lower on Monday on larger-than-expected feedlot placements in May and expectations for slower demand for beef for outdoor grilling following the U.S. Independence Day holiday.

Sharply higher feed corn prices early in Monday's trading session weighed on the live and feeder cattle prices from the open, but the livestock markets recovered most losses once corn retreated from the day's highs.

Live cattle, however, remained anchored by expectations for greater supplies in the pipeline after the U.S. Department of Agriculture said in a monthly report that May feedlot placements were up 5% from a year earlier. Traders had expected a mere 1.7% increase.

"The cattle on feed report came in a little bit hotter than expectations," said Matthew Wiegand, commodity broker for FuturesOne.

"Seasonally, cattle numbers are getting a bit bigger, boxed beef demand has been more lackluster lately and we're eight days out from the last good grilling holiday," he said.

The benchmark CME August live cattle contract settled down 0.175 cent at 170.600 cents per pound. October futures were down 0.475 cent at 174.025.

August CME feeder cattle ended down 0.275 cents at 233.675 cents per pound after touching a low of 231.400 earlier in the session.

CME lean hog futures firmed on Monday on rising wholesale pork prices and tight supplies of hogs.

July hogs added 2.125 cents to settle at 93.400 cents per pound while most-active August gained 0.375 cent to close at 90.050 cents a pound.

The hog and cattle slaughter is likely to be slightly larger than normal this week as meat processing plants prepare to go idle around the Independence Day holiday next Tuesday. Slaughter schedules will also be ramped up late next week to make up for the holiday downtime.

(Reporting by Karl Plume; Editing by Shweta Agarwal)