**Trader consensus on an 86-87°F high for Miami on September 26, 2026, reflects model guidance and climatological context pointing to near-normal late-September conditions.** Official NWS normals place the average daily high at 88.5°F, with typical afternoon maxima driven by subtropical high pressure, light winds, and moderate humidity. Ensemble forecasts from NOAA and other agencies consistently projected peak temperatures in the mid-to-upper 80s under partly cloudy skies and minimal diurnal range, aligning with recent years where highs clustered around 88-91°F absent strong tropical moisture or cold fronts. The narrow 86-87°F bin captured the tightest agreement across model runs, with limited upside from sea-breeze enhancement or downside from increased cloud cover. Scenarios that could have shifted the outcome include an earlier-than-expected frontal passage or deeper tropical moisture increasing convective cooling, though neither materialized in the final model consensus.