Pennsylvania’s average gas prices continue to drop this week Wednesday, September 14 by Louise BennettUndated - Pennsylvania’s average gasoline prices are another 7.4 cents lower this week and are now at $3.91 per gallon.GasBuddy surveys more than 5,200 stations to figure out the state average.The average per gallon price has now dropped 38 cents in the past month.Gas... Read More.