Averages gas prices in Maine are up 4.2 a gallon from a week ago.

The average price of a gallon of gas in Maine Monday is $3.73 a gallon — up 11.5 cents from one month ago, according to gasbuddy.com.

The average price for a gallon of gas nationally is $3.65 a gallon — an increase of 2.5 cents from last week.

Gas prices in Maine are 23.2 cents a gallon higher than they were one year ago.