As refinery maintenance ends and crude costs settle pump prices may start to fall, but a number of factors could push prices back up.

On June 1, the national average price for a gallon of gas stood at $2.75, marking the highest average of 2015, according to a report by AAA.

But customers might get some major gas price relief in the near future, which could lead to more in-store purchases at convenience stores, as well as more visits to c-stores as summer road trips soar and with them c-store stops.

Crude oil costs are stabilizing and refineries are finishing their seasonal maintenance, which combined could result in the least expensive summer gas prices since 2009, according to AAA.

On a recent AAA survey, some six in 10 Americans responded that they were more likely to take a road trip of 50 miles or more in 2015 if gas prices remain near recent levels.

However, even as lower prices are anticipated, numerous factors could instead send gas prices climbing, such as increased fighting in the Middle East, unexpected problems at major refineries or strong Atlantic hurricanes.

California continues to post the highest gas prices nationwide at $3.70 per gallon, followed by Hawaii, Nevada and Alaska, which all average $3.30 per gallon.

Mississippi and South Carolina are tied for the cheapest gas in the nation at $2.44 per gallon, followed by Oklahoma at $2.46 per gallon.