The price for diesel fuel has posted the largest decline in three months, at nearly three cents, but the cost of a gallon is still running at the highest level in a year.

The average U.S. retail pump price for diesel fell 2.7 cents in the Nov. 14 report by the Energy Information Administration (EIA), to $2.443 per gallon. That’s also about four cents cheaper than this time last year.

Every region saw a price decline, paced by the Rocky Mountains, where a gallon was a full four cents cheaper ($2.492), and the Midwest, down 3.8 cents ($2.387).

Prices fell two cents or so along the East Coast, coming in at $2.482 in New England,  $2.564 in the Central Atlantic, and $2.363 in the Lower Atlantic.

On the West Coast, less California, diesel posted 1.6-cent drop to $2.657, and the ticking upward 0.01 cents to $2.584. In California, the price fell 0.3 cents in California to $2.837, the highest price in the lower 48 states.

Diesel was down 2.4 cents on the Gulf Coast to $2.316, still the lowest price for a gallon of diesel in the country.

The national average price for gasoline fell 4.9 cents for the week to $2.184.