California, which has the highest gas prices in the nation, has reached $3.89 for a gallon of gas.

Gas prices continue to climb upward, spurred higher due to the turmoil in Libya, with crude oil prices moving above $106 per barrel in overnight trading, marking a two-and-a-half year high.

The national average price for a gallon of regular gasoline rose six tenths of a cent to $3.509, according to a daily survey by motorist group AAA.

Prices at the pump vary among states, due in large part different gasoline tax, but have increased across all states for 13 days in a row, rising nearly 34 cents in that time. The highest gas prices in the nation are in California, where drivers pay an average of $3.897 a gallon. Prices were also above $3.80 in Hawaii and Alaska. Montana had the lowest gas prices at $3.186 a gallon, on average. Wyoming was a close second with an average cost per gallon of $3.189, CNN Money reported.

Peter Beutel, president of energy risk management firm Cameron Hanover, told CNNRadio that he expects gas prices to continue moving higher. “I expect that the average is going to be something around $3.75 or $3.80 a gallon,” he said, adding prices will probably remain below $4 a gallon in most parts of the country unless we see widespread political unrest in the Persian Gulf.

On Sunday, a Lundberg survey showed gas prices increased almost 33 cents in two weeks, the second-biggest price jump in the history of the gasoline market, noted CNN Money.