PORTLAND — Average retail gasoline prices in Maine have risen 1 cent per gallon in the past week and average $2.72.

The MaineGasPrices.com Web site says prices Monday were 73.5 cents per gallon higher than the same day one year ago but 3.3 cents per gallon lower than a month ago. That follows national price trends.

Petroleum analyst Patrick DeHaan says that with warmer weather approaching, prices will climb further. DeHaan said that’s because refiners will soon begin maintenance to prepare for the summer driving season, cutting into supply.

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