Gas prices in Western Pennsylvania are down by a penny over the week at $3.12 per gallon, according to AAA East Central’s Gas Price Report.  On the week, gas prices are cheaper across the Mid-Atlantic and Northeast states.  However, compared to one month ago, gas prices fluctuate between two cents more expensive or cheaper across the region (Pennsylvania, +2 cents). The average price of unleaded self-serve gasoline in Beaver County is $3.16.