SHERMAN, Texas (KXII) - September was the most expensive month ever for gasoline prices, and experts say there's no end in sight.

Texas drivers just experienced the most expensive September on record for regular unleaded gasoline.

Normally, prices drop as the weather cools, but uncertainty overseas is keeping costs high."The uncertainty with the Straight of Hormuz has created higher oil prices, and oil is the main ingredient, crude oil is, in gasoline," said AAA Spokesperson Daniel Armbruster.