BERGEN COUNTY, N.J. — Gas prices are climbing again, and while Bergen County has the cheapest gas in New Jersey, drivers are still paying more than $4 a gallon.

New Jersey’s average price for a gallon of regular gasoline jumped 12 cents over the past week to $4.36, according to AAA data reported Friday.

Bergen County has the cheapest gas in New Jersey, at an average of $4.32 a gallon. Cape May County is the most expensive at $4.50.

The jump comes as prices are rising across the country. The national average surged 13 cents in one week to $4.27 a gallon.

That is up from $4.00 a month ago and $3.19 a year ago.

Crude oil prices have climbed back toward $100 a barrel, with volatility around the Strait of Hormuz adding pressure to global oil markets. West Texas Intermediate crude settled at $96.05 a barrel on Sept. 9 after rising $3.02 during the trading session.

The latest spike is also coming at an unusual time of year.

Gas prices typically begin falling after the summer travel season as vacation driving winds down and children return to school. Instead, prices are moving sharply higher.

New Jersey’s average price is now 34 cents higher than it was a month ago and $1.19 higher than at the same time last year.

Nationally, California has the highest average gas price at $5.89 a gallon, followed by Washington at $5.53 and Hawaii at $5.40.

At the other end of the pump, Indiana has the cheapest average price in the country at $3.56, followed by Mississippi at $3.80 and Texas at $3.83.

AAA said gasoline demand actually fell last week, dropping from 8.92 million barrels per day to 8.55 million. Domestic gasoline supplies increased from 205.7 million barrels to 206.9 million barrels.

Despite those numbers, higher crude oil prices continue to push what drivers see at the pump.

For Bergen County drivers, that means the cheapest average price in New Jersey is still $4.32 a gallon.

And for anyone filling up this weekend, the number on the pump is a lot higher than it was just a few months ago.