Average retail gasoline prices in Minnesota have risen 0.6 cents in the past week, averaging $3.23 per gallon Sunday, according to GasBuddy’s daily survey of 2,856 gas outlets in Minnesota. This compares with the national average that has not moved in the last week to $3.30 per gallon, according to gasoline price website MinnesotaGasPrices.com.

Prices for regular, mid-grade, premium and diesel fuel in International Falls were not listed on the site.

Including the change in gas prices in Minnesota during the past week, prices Sunday were 25.1 cents per gallon higher compared to the same day one year ago and are 22.8 cents per gallon higher than a month ago. The national average has increased 5.7 cents during the last month and stands 3.3 cents per gallon higher than this day one year ago.

“While the cold weather is about the lock the country into a deep freeze, we’re also seeing a bit of a freeze in the national average,” said GasBuddy.com Senior Petroleum Analyst Patrick DeHaan. “For much of the week ahead, we may see the freeze at the pump continue, as oil prices have recently shed some of their gains from late December. January and February see some of weakest demand for gasoline in the year, so it wouldn’t be surprising to see the average move slightly downward in the next couple weeks,” 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.