Customer shops at a Kroger supermarket in Peoria, Ill.

U.S. consumer sentiment deteriorated for a second straight month to hit its lowest in over a year in January, with a record number of consumers citing the recent "fiscal cliff" debate in Washington, a survey released on Friday showed.

The Thomson Reuters/University of Michigan's preliminary reading on the overall index on consumer sentiment came in at 71.3, down from 72.9 the month before. The index was at its lowest since December 2011.