NEW YORK (AP) – Retail gasoline prices climbed to another record Monday, while crude oil futures jumped above $66 per barrel amid concerns about gasoline supply heading into the peak summer driving season. A gallon of regular unleaded costs an average of $3.196 across the country, up from $3.178 on Sunday, according to AAA and Oil Price Information Service.

Prices are up 33.7 cents from a month ago and 30.4 cents from a year ago, as demand remains strong, and a spate of planned and unexpected refinery shutdowns have constricted supply. The U.S. Energy Information Administration reported last week that gasoline inventories are still well below the average for this time of year.

The nation’s peak driving season, meanwhile, is set to begin this long Memorial Day weekend.