COLUMBUS (AP) — Gas prices around Ohio have continued to increase heading toward the Memorial Day weekend.

The average price per gallon was $2.38 in Monday’s survey from auto club AAA, the Oil Price Information Service and WEX Inc. The average in Ohio this time last week was $2.22. It was $2.18 a month ago.

Ohio’s price to start the week was 10 cents above the national average price in Monday’s survey.

The national average this time last year was $2.74. Ohioans were paying an average of about $2.73 at the same time in 2015.

Gas prices have been rising partly due to more expensive crude oil costs brought about by wildfires in Canada and supply disruptions in other oil-producing countries.