The market's near-certain positioning on a 76-77°F high for Los Angeles on August 4 reflects official observations from the Los Angeles International Airport (KLAX) station, the designated resolution source via Weather Underground and aligned National Weather Service data. Onshore flow and a persistent marine layer suppressed daytime heating along the coast, producing seasonably moderate conditions consistent with climatological normals around 75-77°F for early August. Model consensus from NOAA and other agencies showed minimal deviation, with no heat wave or offshore wind event materializing to push readings higher. Traders' strong consensus draws from this verified observational record rather than forecasts alone. Resolution could shift only in the unlikely event of a post-hoc station data revision or alternate official reporting methodology, though historical precedent indicates such adjustments are rare and minor.