Official NOAA observations at Miami International Airport recorded a daily maximum of 91°F on September 10, 2026, aligning precisely with the 90-91°F bin and driving the market's near-certain consensus. This outcome fits typical late-summer conditions, with southeasterly flow, high humidity, and sea-breeze convection limiting further warming despite partly sunny skies. The National Weather Service forecast had anticipated a high near 90°F amid a 60-70% chance of afternoon showers, consistent with the 1991-2020 climatological average of 89.6°F for the date and recent daily maxima of 90-92°F. While model uncertainty around storm timing could have suppressed the peak below 90°F, the actual reading confirmed the upper end of expectations. Revisions to official hourly data remain possible but unlikely given standard quality controls.