If you’re traveling on the roads over the Christmas weekend, you’ll be paying less for gas. According to Triple-A the national average for a gallon of regular this morning is 3.12 a gallon. In California, the average is 4.36 a gallon. Roughly 30 cents cheaper per gallon than last Christmas. In San Luis Obispo County 4.88 a gallon and in Santa Barbara County 4.51 a gallon.