Regular unleaded gasoline prices in Chillicothe dropped even further, down to $2.93 per gallon, over the weekend. The lowest that gas prices reached last year was in mid-December, when they dipped below the $3 line, at $2.99 per gallon. On Jan. 4 of this year, regular unleaded gas reached $2.95, which was the lowest it had been since Dec. 2011.