The average cost of on-highway diesel has turned higher this week for the first time since the first of September while gasoline has increased for the second consecutive week.

Diesel picked up 2.2 cents over the past week, registering $3.844 per gallon, but is 19 cents lower than the same time a year ago, according to a new U.S. Energy Department report.

Prices in all the different regions and sub regions of the country increased, except in the West Coast region, where it is unchanged over the past week.

The biggest hike was in the Midwest region, increasing 3.5 cents, for an average of $3.829 per gallon.

Prices range from a low of $3.753 in the Gulf Coast region, up 0.8 cent from a week ago, to a high of $4.003 in the New England sub region of the East Coast, increasing 2.2 cents during the same time.

Meantime, the average cost of gasoline increased for the second straight week, adding 7.4 cents from a week ago and coming in at $3.293 per gallon. The prices is 14.4 cents lower than the same time last year.

Prices increased in all parts of the country, except in the Rocky Mountain and West Coast regions.

Gasoline ranges from a $3.14 per gallon in the Gulf Coast region, up 13.6 cents over the past week, to a high of $3.457 per gallon in the West Coast region, down 1 cent during the same time.

The increases comes as oil in New York trading on Monday settled at $94.09 per barrel, up just over a dollar from a ago, while it fell 75 cents on Monday, after it was announced over the weekend that a group of western nations, including the U.S., reached a short-term agreement with Iran over its nuclear program.