The average price of a gallon of regular gasoline at self-serve stations was $3.70 Friday. Mid-grade was at $3.83 and premium was at $3.95.
That's according to the Lundberg Survey of 7,000 gas stations nationwide, released Sunday.
Diesel was at $3.82.
The California average was $3.94, down 16 cents from two weeks ago.
Gas was cheapest in St. Louis, Mo., at $3.37 for a gallon of regular. It was most expensive in Anchorage, Alaska, at $4.34.
Despite the drop, gas nationally was almost 95 cents higher than a year ago.
Prices so far this summer peaked July 11 at $4.11 for a gallon for regular.