Motorists should expect to see a seasonable rise in gas prices this spring.

According to a Naples Daily News report, refineries are easing into maintenance season, which normally signals a gradual increase in prices at the pump. Throughout the past five years, gas prices rose 35 to 70 cents from February to Memorial Day, and motorists should expect the same this year, according to a news release from AAA – The Auto Club Group.

“The seasonal increase hasn’t begun yet, but it’s coming,” said AAA spokesman Mark Jenkins. “Prices usually rise this time of year as refineries power-down some of their machinery for routine maintenance and prepare for the switch to the more expensive summer blend gasoline. Because of the outages, refineries don’t produce as much gasoline. All this comes at a time when demand typically rises as Americans resume road trips in the spring.”

On average, the price for a full tank of gas is $8 more than this time last year. The national average price for a gallon of regular unleaded is $2.29, just fractions of a cent more than a week ago, a half cent less than a month ago, and 56 cents more than a year ago, AAA reports.