HOUSTON (January 10, 2013)--Drivers in Texas are paying more for gasoline this week.

Retail prices are up an average of a nickel per gallon to $3.18 a gallon, AAA-Texas reported Thursday.

Gasoline prices also rose nationally this week, adding 2 cents to reach $3.31 per gallon.

The association survey found Dallas has the most expensive gasoline in Texas at $3.22 per gallon.

The cheapest gasoline statewide is in El Paso at $2.99 per gallon.

AAA Texas predicts gasoline prices will rise through April or early May, but at a slower pace than last year.

Experts say it's typical for prices to go up during winter months because of seasonal demand and in anticipation of the switchover to more expensive summer-blend gasoline.