Average retail gasoline prices in Minnesota have fallen 17.9 cents in the past week, averaging $3.84 per gallon Thursday, according to GasBuddy’s daily survey of 2,856 gas outlets in Minnesota. This compares with the national average that has fallen 1.5 cents in the last week to $3.64 per gallon, according to gasoline price website MinnesotaGasPrices.com.

Prices in International Falls Thursday ranged from $3.86 to $4.14 per gallon, according to the website.

Including the change in gas prices in Minnesota during the past week, prices Sunday were 32.6 cents per gallon higher compared to the same day one year ago and are 24.9 cents per gallon higher than a month ago. The national average has increased 13.1 cents per gallon during the last month and stands 3.1 cents per gallon higher than this day one year ago.

“While the national average has given up some ground to start the driving season, motorists have certainly seen a lot of ups and downs in different areas of the country,” said GasBuddy.com Senior Petroleum Analyst Patrick DeHaan. “One thing remains the same throughout the United States, and that is we’re still reliant on oil refineries to process crude oil into gasoline. When they go partially offline whether expected or unexpected, there’s going to be tightness in gasoline supply, and that has an almost immediately impact at the gas pump,” DeHaan said.

GasBuddy operates MinnesotaGasPrices.com and over 250 similar websites that track gasoline prices at more than 140,000 gasoline stations in the United States and Canada.