PORTLAND — A fuel-watching website says average retail gasoline prices in Maine have risen 5.1 cents per gallon in the past week to $3.64 per gallon.

MaineGasPrices.com says average prices Sunday were 43.7 cents per gallon higher than they were the same day one year ago, and are 16 cents per gallon higher than a month ago.

The national average has increased 12.3 cents per gallon during the last month and stands 34.8 cents per gallon higher than this day one year ago.

Price analyst Patrick DeHaan says retail gasoline prices have continued to slowly rise across a majority of the United States. Some of the largest cities, including New York and Los Angeles, are closing in on $4 per gallon.