Average U.S. retail gasoline prices have risen for the second week in a row and are now 8.2 cents above the week ago price, Gas Buddy said in a note on Monday, citing refinery outages. While gasoline prices are now $3.25 per gallon as of Sunday and above last week’s averages, according to Gas Buddy data, prices are relatively flat on the month. “Last week, the rise in gasoline prices continued, still due to previous refinery outages caused by the cold weather the week of Christmas. However, I’m optimistic that as refiners get…