Analyst Trilby Lundberg says the average price for a gallon of mid-grade was $2.73. Premium was at $2.84.
Cheyenne, Wyo., had the lowest price among cities surveyed at $2.26 a gallon for regular. Anchorage was the highest at $3.27.
In California, prices barely budged since Dec. 4. A gallon of regular cost an average of $2.88.
Fresno had the state's least expensive gas at $2.79 a gallon.
San Francisco remained the steepest at $2.92.