This is exactly why the whole issue is a non-issue. Tanks are in fact deeper than 6-8 feet in many cases, meaning that there is even less variation.

I worked in a family gas station for many years; we also ran a fuel oil business and trucked our own fuel from the transfer station/refinery. We temperature-corrected at the refinery at time of loading, but did not do so at the consumer pump. Why? Because the temperature 15 feet underground didn't vary significantly. Swings and roundabouts, the consumer won as much as he lost. There was also a sticker prominently displayed on the pump to note the standard temperature the pumps were calibrated to.

Many years back I also ran fuel consumption tests on large industrial diesel engines, typically 4500 hp, often used in power stations for mines or in remote areas. I was responsible for certifying the test results for the client witness tests. We temperature corrected to 25C, as per the ISO and SAE standards, and we also corrected to a standard Lower Heating Value (calorific content) based on the results of a sample fuel test using a bomb calorimeter. Technically interesting, but irrelevant in the real world as the correction factors were usually in the second or third decimal place. This is important if you are buying a 20 mW power station with a 15 year useful life and an 80% load factor, but nonsense in terms of protecting the consumer from gasoline companies.

Next, someone should sue the weatherman. They could be charged with abuse of both humidity and temperature, as both will affect real engine power. Maybe even sue the land surveyors, as they are surely responsible for high altitude and the resultant power reductions in internal combustion engines.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue