NEW YORK (REUTERS) - The U.S. government will likely report nonfarm payrolls added 190,000 workers in September and upgrade its August jobs increase by a "sizeable" amount, Moody's Analytics chief economist Mark Zandi said on Wednesday.

The expected 190,000 reading from the U.S. Labor Department due on Friday at 8:30 a.m. (8:30 pm Singapore time) is below the 203,000 gain forecast among analysts polled by Reuters.

Mr Zandi said his projection on the September figure stemmed from fluctuations on seasonal adjustments of the hiring of government workers this time of the year, particularly teachers.

Mr Zandi was speaking to reporters on a conference call following the release of the ADP National Employment Report that showed a 200,000 increase in private jobs in September.

The ADP report is jointly developed by Moody's Analytics and payrolls processor ADP.