**Forecast models from the National Weather Service and other sources indicate Miami's overnight low on September 2, 2026, will likely settle in the upper 70s to low 80s°F amid typical early-September tropical conditions.** Persistent high humidity, warm sea-surface temperatures in the Atlantic and Gulf, and the urban heat island effect limit radiative cooling overnight, keeping minimum temperatures elevated despite daytime thunderstorm activity that may briefly enhance mixing. With no strong cold fronts or tropical systems expected to alter steering patterns or introduce drier air in the next 48 hours, the primary uncertainty lies in exact cloud cover and precipitation timing, which could nudge the low by 1–3°F. Traders appear to price this narrow range with balanced odds across bins, reflecting consensus around 80°F while acknowledging model spread in boundary-layer moisture. Updated NHC and local forecast discussions through September 1 will provide the key data for any shifts before resolution.