WASHINGTON (Reuters) - U.S. consumer confidence weakened for a second straight month in January amid renewed concerns about the labor market and inflation.

The Conference Board said on Tuesday its consumer confidence index fell to 104.1 this month from an upwardly revised 109.5 in December. Economists polled by Reuters had forecast the index rising to 105.6 from the previously reported 104.7.

"Views of current labor market conditions fell for the first time since September, while assessments of business conditions weakened for the second month in a row," said Dana Peterson, the chief economist at the Conference Board. "Additionally, references to inflation and prices continue to dominate write-in

responses."