BOSTON — Gas prices across Massachusetts were left relatively unchanged over the past week, rising in price by just 0.6 cents per gallon.

According to GasBuddy's daily survey of 2,830 stations, Massachusetts gas prices have risen 0.6 cents per gallon in the past week, averaging $2.54 per gallon Monday. Gas prices in Massachusetts are 0.8 cents per gallon higher than a month ago, yet stand 30.3 cents per gallon lower than a year ago.

According to GasBuddy price reports, the cheapest station in Massachusetts is priced at $2.23 per gallon while the most expensive is $3.49 per gallon, a difference of $1.26. The cheapest price in the entire country Monday stands at $1.89 per gallon while the most expensive is $5.49 per gallon, a difference of $3.60.

The national average price of gasoline has fallen 2.4 cents per gallon in the last week, averaging $2.63 per gallon on Monday. The national average is up 6.5 cents per gallon from a month ago, yet stands 25.1 cents per gallon lower than a year ago.

"As expected, the national average has reverted to declining in the midst of resolution to refinery issues in the West Coast, while lower demand also weighs on oil prices, leading to modest relief in some areas of the country," said GasBuddy Head of Petroleum Analysis Patrick DeHaan.

"While a partial trade deal with China may temporarily interrupt continued relief, the devil will be in the details- will any potential trade deal lead to solid expectations for economic growth in the U.S.? If so, then expect oil prices to follow to higher ground, before taping off after new optimism brings a small rally to oil, but if the latest talk of a trade deal is believed to be more like lipstick on a pig, then I expect gas prices will continue to decline. Either way- one thing holds true no matter if there's a trade deal or not- and that's that California motorists will see relief in the weeks ahead after refinery issues have abated."