PORTLAND — Gas prices in Maine continue to go down following a sharp increase earlier this summer.

Price-monitoring website MaineGasPrices.com reports Monday that the average retail cost of a gallon of gas has fallen 4 cents in the past week to an average of $3.70. The prices are based on a survey of more than 1,200 Maine gas stations.

Prices are 8 cents a gallon cheaper than a year ago, but 6 cents higher than a month ago.

GasBuddy.com analyst Patrick DeHaan says prices nationally could be 10 to 25 cents a gallon lower than now come mid-September.

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