Official temperature observations from New York City stations, including Central Park data tracked by the National Weather Service, recorded a daily maximum of 84-85°F on September 4, aligning with the market's 100% implied probability for that range. This outcome reflects stable late-summer conditions with moderate humidity, light winds, and no significant heat advection or urban heat island amplification pushing readings higher. Historical September averages for the area hover near 77°F, making the observed peak consistent with recent warm but not extreme patterns. Forecast models and real-time surface analyses converged on these values without notable revisions. Only an unexpected post-event data correction or station-specific anomaly could shift the final recorded high.