Official observations from the National Weather Service at Miami International Airport recorded a daily maximum of 90°F on September 9, 2026, locking in the 90-91°F outcome at near-certainty. This aligned closely with the 1991-2020 climatological average high of 89.7°F and pre-event model consensus forecasting a peak near 90°F under east-southeast winds of 5-15 mph, mostly sunny to partly cloudy skies, and a 40-50% chance of afternoon sea-breeze thunderstorms. Such convection, common in early September tropical moisture, typically limits further warming while sustaining high humidity. Realistic challenges to this resolution would require revised station data or an undocumented spike above 91°F, though multiple corroborating reports and historical analogs make significant deviation improbable.