AAA said customers can likely expect to see prices continue to rise over the next few weeks, but, at the same time, the prices will still be significantly less than a year ago. The national average is expected to remain below $3 throughout 2015. In Oregon, the average price will likely climb above $3, AAA reports.The average prices this week in Bend, Eugene and Medford have already reached $3.Oregon currently has the fifth most expensive gasoline prices in the country. Washington is sixth, while California tops the list at $3.71 per gallon. Copyright 2015 KPTV-KPDX Broadcasting Corporation.AA said customers can likely expect to see prices continue to rise over the next few weeks, but, at the same time, the prices will still be significantly less than a year ago. The national average is expected to remain below $3 throughout 2015. In Oregon, the average price will likely climb above $3, AAA reports.