Official forecasts from the National Weather Service Miami office project mostly sunny conditions for September 26 with highs in the upper 80s under northerly winds of 10-15 mph that are advecting drier air behind a weak front. This setup supports the market's leading 88-89°F bin at 54.5% implied probability while capping potential for the 90°F+ outcomes priced below 7%. Historical normals place the average high near 88.5°F, but recent model consensus and reduced moisture align with the 86-87°F range holding secondary support at 31%. Resolution hinges on the official daily maximum recorded at Miami International Airport, with minimal afternoon convection expected to limit upside variance.