Average gasoline prices in Pennsylvania have fallen 3.1 cents per gallon in the last week, averaging $3.34/g today, according to GasBuddy’s survey of 5,269 stations in Pennsylvania. Prices in Pennsylvania are 7.9 cents per gallon higher than a month ago and stand 3.6 cents per gallon lower than a year ago. The national average price of diesel has decreased 2.4 cents in the last week and stands at $3.626 per gallon…