 The increase at the pump. Gas prices increased today, ahead of the July 4th holiday. The average price for a gallon of regular gas rose to $3.50, according to AAA. It was the first increase in two days. A week ago, the average price for a gallon was $3.46, really $3.47. A month ago, it was $3.53. A year ago, it was, again, about $3.53.