For the week ending Jan. 2, the U.S. average diesel fuel price increased 4.6 cents from the previous week to $4.583 per gallon, the U.S. Department of Agriculture said today. That's 97 cents above the same week last year.

The increase in diesel prices comes after seven straight weeks of falling prices, including double-digit drops in three of those weeks. Diesel prices increased in every region except the Rocky Mountain region, which saw a decline of 1.5 cents, the USDA said.

In the Midwest, diesel prices were up 2.1 cents from last week — 94.6 cents higher than the same time last year.