U.S. gasoline prices rose on Tuesday as refineries across the country closed due to freezing temperatures. Gasoline prices have risen 12.4 cents from this time last week, according to the AAA data available on Tuesday. The average price for a gallon of gasoline in the United States is now $3.228, AAA shows—6 cents per gallon lower than this time last year. Gasoline prices began to rise during the cold snap that shut down refineries such as Suncor’s refinery in Colorado—that state’s only refinery. On Christmas Eve, Suncor…