In the cars fuel line or the gas pump?
Ive been pumping gas with this car for over 5 years and the issue seem to flare up between October through March. Very noticeable when the temperatures range from -20 F to 35 F degrees. I suppose it could be a mere coincidence.
In the filler neck, which is the big rubber hose that connects where you put the nozzle in and the gas tank. It could also be a tank venting issue.
It is odd that it seems to hapen with the temperature change. Colder temps would make the rubber lines constrict a little bit, so it could be a rubber vent line that get's blocked, or it could be a hose that stops sealing on it's metal fitting.
Really the only way you're diagnosing this is probably dropping the tank and inspecting the filler neck, and all of the Evap/vent hoses/fitting on the top of the tank.