Official temperature observations from National Weather Service stations across Los Angeles confirmed a daily maximum of 76-77°F on August 12, producing complete market consensus around that narrow range. Persistent marine-layer clouds and moderate onshore flow kept daytime heating well below the seasonal average of roughly 85°F, consistent with recent model runs from NOAA and the NWS that had projected limited solar insolation and a stable boundary layer. Multiple automated and manual reporting sites provided redundant verification, reinforcing trader confidence in the outcome. Only an unforeseen instrument calibration issue or localized microclimate anomaly outside standard measurement protocols could realistically alter the recorded high.