**Trader sentiment for Miami's lowest temperature on September 5, 2026, centers on the 76–81°F range, with 76–77°F, 80–81°F, and 78–79°F holding nearly equal implied probabilities (30–34% each).** This tight clustering reflects genuine uncertainty in overnight minimums amid typical late-summer subtropical conditions. Official forecasts and station data point to a minimum near 80–81°F, driven by persistently high dew points (around 77–80°F), elevated humidity (80–90%+), and variable cloud cover from scattered showers and thunderstorms. These factors suppress radiative cooling after sunset. Early-morning readings near 81–82°F, followed by only modest drops to the upper 70s–low 80s under light winds and partial clearing, align with National Weather Service guidance and recent station observations (e.g., prior days' lows of 75–78°F rising amid warmer advection). Differentiation among the leading bins hinges on small shifts in timing and intensity: stronger or earlier convection could trap heat and push the low toward 80–81°F, while clearer skies or lighter winds might allow brief radiative cooling toward 76–79°F. Historical September averages near 77°F provide context, but 2026 conditions show slightly elevated warmth. Market odds remain balanced because models show modest spread and official Miami International Airport observations carry inherent micro-scale variability. Newer forecast updates or real-time station trends could quickly shift the consensus.