Official National Weather Service observations for downtown Los Angeles on September 15, 2026, recorded a maximum of 82°F, with nearby stations such as Los Angeles International Airport reporting afternoon highs near 80°F under partly cloudy skies, light southwest winds, and typical late-summer marine influence that limited further warming. This verified range aligns directly with the market’s dominant 80-81°F outcome at 100% implied probability, reflecting traders’ aggregation of real-time station data and preliminary climatological reports rather than forecasts. Historical September averages near 76°F and the absence of heat-wave conditions or Santa Ana winds reinforced the outcome. A realistic challenge would require an official data revision or a shift in the specific station or measurement protocol used for market resolution, though such adjustments are rare once preliminary local climatological data are released.