Florida gas prices are at their lowest in months following a 25-cent decrease over the last 17 days. The state average was $3.30 per gallon June 19, the lowest daily average since Feb. 28, according to data from AAA. The average gas price is 15 cents less than a week ago. In Southwest Florida, Charlotte County had the lowest average at $3.18 per gallon, followed by Lee County ($3.31) and Collier County ($3.41).