The national average price for on-highway diesel decreased 6.5 cents during the past week and 36 cents since April. The U.S. Energy Information Administration reported the national average at $3.781 for the week ending Monday, June 11.

Diesel prices dropped more than 10 cents in California to $4.066. All other regions tracked by the EIA are under $4 with the lowest being the Midwest at $3.696.

Following are the diesel averages by region as reported by the EIA:

U.S. – $3,781, down 6.5 cents
East Coast – $3,818, down 6.8 cents
New England – $3.974, down 6.2 cents
Central Atlantic – $3.909, down 5.9 cents
Lower Atlantic – $3,721, down 7.6 cents
Midwest – $3.696, down 5 cents
Gulf Coast – $3.698, down 5.9 cents
Rocky Mountain – $3.873, down 4.6 cents
West Coast – $3.991, down 11 cents
West Coast less California – $3.902, down 12 cents
California – $4.066, down 10.3 cents

ProMiles, which tracks prices daily at 9,400 truck stops, showed the daily average at $3.769 on Monday, down three-tenths of a cent over the weekend.

Just four individual states were still above the $4 mark on Monday – Vermont, Connecticut, Washington state and New York. California slid just below the mark on Monday according to ProMiles.

Oil prices were on the slide Monday as well, with domestic crude falling nearly $2.40 per barrel to $81.72. European Brent crude was trading at $98.61 on Monday, down 86 cents.