**Forecast models from sources like the National Weather Service and WeatherBug indicate persistent moisture and afternoon convection will likely cap Miami's September 4 high in the upper 80s.** High humidity, southeast winds of 5–10 mph, and 60–70% storm chances favor cloud cover and rainfall developing by midday or early afternoon, which suppresses peak temperatures via evaporative cooling and reduced insolation. This aligns with climatological norms for early September, when Miami averages near 88–89°F but sees frequent thunderstorms that prevent extremes. The close split between 88–89°F (39.5%) and 90–91°F (42%) market-implied odds reflects model uncertainty in convective timing and coverage—stronger or earlier storms favor the lower bin, while any delay or partial clearing could allow brief warming into the low 90s. No tropical systems are currently influencing the region, keeping outcomes within typical seasonal variability. Updated model runs and National Hurricane Center guidance will refine these probabilities as the date approaches.