Average gas price at least $4 a gallon in dozen states as cost of oil climbs to $90 a barrel

Gasoline prices are now at least $4 a gallon in a dozen states amid rising global oil prices. 

Oil prices on Thursday were for the first time in 10 months over $90 a barrel, which could further increase gas prices.

The cost of gas typically declines following the summer holiday travel season because demand declines, but the cost this week is just pennies away from their highest level of the year, according to CNN. 

According to AAA, the national average for regular gasoline is now $3.86 a gallon –16 cents higher than the same day last year. Plus, a dozen US states are already averaging $4 a gallon or higher for regular gasoline, including.

Colorado, North Dakota and California are among the states in which the average gas price is over $4 a gallon.