The price in S.C. fell 2.8 cents during the past week to an average of $2.02 a gallon, according to gas price gauger GasBuddy.
Including the change in gas prices in Chattanooga during the past week, local gas prices are still 47.5 cents per gallon higher than the same day one year ago when gas averaged only $1.53 per gallon.
Pennsylvania's decrease in gas prices mirrors the national trend.
"Falling gas prices are normal for this time of year", said a statement Carrasco, a spokesman for AAA - The Auto Club Group.
Gas prices dipped this week following a decline in demand, according to AAA.
Prices in the region Monday ranged from $1.93 per gallon in Summerville and West Ashley to $2.29 in West Ashley. After prices tumbled to less than $2 in many parts of Florida through Thanksgiving week, oil producing nations agreed to cut production by 1.8 million barrels of day for the first six months of 2017.
US President Donald Trump, British PM Theresa May Hold Joint Press Conference
The days of Britain and America intervening in sovereign countries in an attempt to remake the world in our own image are over. Despite their public spat over Trump's border wall, the two leaders had a "very, very friendly call", Trump said.
There are no USA gas stations charging more than $4.00 a gallon for gas (yet) and just 0.1% charging between $3.50 and $4.00 a gallon.
Nationally, the price of price has fallen 6.7 cents over the past month.
The average price in OH was $2.01 early Monday, making it the least expensive state in the country to buy gas.
$2.64/g in 2016, $3.15/g in 2015, $4.00/g in 2014, $4.09/g in 2013 and $4.07/g in 2012.
However, DeHaan said, "the sweet deal likely won't stick much longer". Compared to a year ago, however, US drivers are paying about 46.7 cents more per gallon, roughly $9.33 cents more on a 20-gallon fill-up.
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