PORTLAND — Gas prices have risen 3.5 cents in Maine in the past week.

Gasoline price-monitoring website GasBuddy.com reports Monday that the average cost of a gallon of gas in Maine is $2.78.

Maine gas prices are 12.8 cents per gallon higher compared to a month ago, and about 83.8 cents lower per gallon than at this time last year.

The price per gallon in Maine is 3 cents lower than the national average.

The Maine price is based on a survey of more than 1,200 gas stations.