Robert Brown|Prices at the pump are down. Here's why.

Good news for drivers: gas prices are Robert Browneasing up.

The national average for regular fuel at the pump was $3.37 per gallon as of Friday, down about 13 cents from last month and nearly 50 cents from a year ago, according to data from AAA. Barring any unexpected road bumps ahead, experts expect prices should keep falling through the remainder of the year.

“If you're going to go somewhere, it's a great weekend to go because prices are going in the right direction,” said AAA spokesperson Andrew Gross. "They've been falling almost a penny a day now."

Why are gas prices down?

For most of the summer, the national average price for regular gasoline could “barely break away” from $3.50 per gallon, according to Gross. Data from AAA shows prices hovering between $3.44 and $3.54 in June and July.

“Now, all of a sudden, it’s just tipped,” Gross said, adding prices haven’t been this low since March.

Consumers have lower oil prices to thank.

“As we've seen oil prices drop in the last month or so, you're seeing prices at the pump play catch-up with that,” said Matt Smith, an oil analyst with commodity data firm Kpler.

West Texas Intermediate, the U.S. benchmark, is down more than 10% from early July. Weakening oil demand in China ‒ a top oil consumer ‒ amid a slowing economy has helped tamp down oil prices, as well as ceasefire talks between Israel and Hamas, Smith said.

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Will gas prices keep falling?

While prices at the pump are improving, there are a number of circumstances that could reverse the trend.

Hurricane season has been relatively quiet this year, but the season isn't over until Nov. 30. And experts say there’s always the chance of geopolitical tensions heating up and causing oil prices to climb.

But barring a major hurricane that hits U.S. oil refineries or a “global catastrophe,” Gross said prices at the pump should “keep dropping steadily” through the end of the year. Especially as refineries start to shift away from summer blend gasoline toward cheaper winter blends in September.

“Looking forward, I think consumers can expect more of the same. So, we will see prices easing a little lower from here,” Smith said. While he’s not confident prices will dip below the $3 per gallon benchmark this year, the trends are “a good thing for our pocketbooks.”

Where are gas prices cheapest?

According to AAA data, states with the cheapest gas prices per gallon as of Friday include:

• Mississippi: $2.92
• Oklahoma: $2.94
• Tennessee: $2.96
• Texas: $2.97
• South Carolina: $3.00

Meanwhile, some states are still selling above $3.50 per gallon on average.

• Hawaii: $4.66
• California: $4.59
• Washington: $4.19
• Nevada: $3.96
• Oregon: $3.82