Oklahoma’s average price for self-serve regular gasoline was at its lowest point Tuesday since 2010, AAA reports. Although the state average has bounced around quite a bit recently, it is still about where it was one month ago.


“Tuesday, we’re at $2.56 per gallon in Oklahoma, just a couple of cents below the price four weeks ago,” said Chuck Mai, spokesman for AAA Oklahoma. “With oil still in the low 50s, we have to believe pump prices in Oklahoma are headed down, especially with so much oil on the market and global demand in the doldrums.”


The national average for regular gasoline is $2.78 per gallon, about a penny more than a week ago and the lowest mark for July 13 date in five years. The steady national average obscures dramatic weekly price movement in several states including California (+36 cents) Indiana (-12 cents) and Michigan (-11 cents).


Nationally, the retail average has fallen for 19 of the past 31 days. Today, it is two cents per gallon less than the 2015 peak price of $2.80 per gallon, hit on June 15, and 84 cents below the price one year ago.


However, drivers in California are once again weathering sharp increases in gas prices due to reports of tightening supplies in the state. The California average has climbed 30 cents per gallon since Friday.


On the heels of this price surge, The Golden State (now at an average of $3.80 statewide) is once again the nation’s most expensive state for retail gasoline. California is followed by regional neighbors: Alaska ($3.47), Hawaii ($3.34), Nevada ($3.27) and Washington ($3.20). At the other end of the spectrum, motorists in South Carolina ($2.41) and Mississippi ($2.46) are paying the least to refuel their vehicles.


Seven states had a gas price average Tuesday lower than Oklahoma’s. Summer road trippers can check city and state gas price averages, updated daily, at FuelGaugeReport.AAA.com.


While a handful of states have seen prices rising and falling sharply, pump prices have been relatively stable across much of the country over the past seven days. Averages are down in 30 states week-over-week, with prices in Indiana and Michigan reflecting the only double-digit declines. Drivers in 20 states and Washington D.C. have seen prices climb higher over this same period.


Domestic supply factors continue to influence gas prices in some states. However, lower global crude oil prices are contributing downward pressure on gasoline prices across the nation.