For a second straight month, Northern California saw a double-digit drop in gas prices, according to the latest monthly AAA statewide gas price survey released Tuesday.
In its September survey, AAA said the average price of unleaded regular gas in the region was $3.83 a gallon, down 10 cents from the Aug. 12 survey.
Statewide, the average at-the-pump price was $3.82 a gallon, down 9 cents from last month. In Sacramento, AAA said the average cost for unleaded regular was $3.75 a gallon, a decline of 9 cents from August.
The Bay Area came in at $3.87, also down 9 cents from a month ago. The national average of $3.43 a gallon was down 4 cents from August.
The least expensive average price in Northern California was in Marysville, at $3.60 per gallon. Yreka has the highest average price in the region at $4.09 a gallon.
AAA noted that the downward price trend is likely to continue.
“September marks the start of refineries beginning their yearly transition to producing a winter-blend of gasoline,” said Cynthia Harris, AAA Northern California spokeswoman. “This blend is cheaper to produce, because it does not need to meet the emissions requirements that are in place to prevent pollution when temperatures are warmer ... .”