LOUISVILLE, Ky. (WDRB) -- Gas prices are increasing around Kentucky, according to AAA.

Gas prices have increased by 23 cents in Kentucky in the last week. Kentucky's current average is $4.018 per gallon. In Louisville, prices rose to $4.172 per gallon, an increase of 21 cents from last week.

Kentucky is still below the national average, which is $4.328 per gallon.

"And in Louisville the same trend, $4.18 a gallon today and that is up 21 cents since last week," AAA spokesperson Lynda Lambert said.

AAA said the increase is primarily due to the high cost of crude oil, which was around $100 a barrel last week, but is now nearing $110.

Gas prices also trend higher around this time of year because refineries switch to summer-blend gasoline, which is more expensive, according to AAA.

"I have a Florida trip in June and my friend and I were checking out airfare and it is triple what we paid last year so guess what, we're driving," Lambert said.

The national average price for a gallon of regular gasoline was $4.27, up 12 cents from last week. Drivers were paying $2.94 a gallon on average a year ago at this time.

Analysts say crude prices are unlikely to fall as long as the supply remains tight. Tracy Noble, spokesperson for AAA Mid-Atlantic, says it now costs drivers in the United States an average of about $23 more to fill up than it did a year ago.

So far, AAA says people are driving less in early May and others are cutting back in other areas to be able to afford family trips on Memorial Day weekend. Lambert said with oil over $100 a barrel and fuel transportation and employee costs up, there's no telling when prices might come back down.

To view gas prices around the state and nation, click here.

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