According to GasBuddy.com, the cost of gas in the Portland area has continued to rise over the last month.

Just this week, the average cost of a gallon of regular gas is up 7.5 cents, averaging $4.33 a gallon. Prices in Portland are 12.9 cents higher than a month ago, but still down 94.2 cents over last year.

The cheapest station in Portland was priced at $3.79 a gallon, while the most expensive was $4.99 a gallon.

The lowest price in the state of Oregon was $3.59 a gallon, while the highest price in Oregon was $5.19 a gallon, according to GasBuddy.com.

The average price of gas around the northwest is comparable to Portland’s price. In Tacoma, people are paying $4.50 a gallon, in Eugene $4.11 a gallon, and in Salem $4.06 a gallon.

This chart shows the average price of gas in Portland on May 30 for the last 10 years.

GasBuddy Analyst Patrick De Haan says he believes gas prices during the summer driving season will range nationally between $3.35 to $3.85 cents a gallon.