Yeah, gas prices around here, especially short-run spikes and troughs, are often affected more significantly by seasonal changes like this than they are by the price of oil.
We’ve also been affected on and off over the past year by refinery problems here in California, which pushes down supply and raises prices. This is made worse by the fact that the state environmental requirements for gasoline mean that not all refineries can produce California-compliant gas, so that when a refinery goes offline, we can’t easily import gasoline from elsewhere.