The national average for a gallon of regular unleaded gasoline stands at $3.66, with the prospect of a five-to-10 cent jump over the next two weeks, according to Patrick DeHaan, senior petroleum analyst at GasBuddy.com. Prices in several Midwestern states have risen sharply on rising demand and the annual switch by refineries to costlier summer-blend fuels.
Gasoline at U.S. Pumps Set to Hit Six-Year Seasonal High. In Michigan, gas averages $3.96 a gallon, up 5% from $3.76 last month. Illinois motorists now pay an average $3.97 a gallon, up from $3.79 last month. In Wisconsin, gas now averages $3.74, up from $3.59. Minnesotans are paying an average $3.59 a gallon, vs. $3.50.