**Forecasts for Miami's high temperature on September 6, 2026, center on the low 90s but carry notable uncertainty from afternoon convection, producing closely matched market-implied odds around 88–91°F.** Official National Weather Service guidance and multiple models show a daytime high near 90–91°F under partly to mostly sunny morning conditions, with temperatures potentially reaching the lower 90s before widespread showers and thunderstorms develop. These storms, driven by high moisture, light variable winds shifting southerly, and typical late-summer instability, are expected to lower readings into the mid-to-upper 80s later in the day. Historical September averages near 89–90°F at Miami International Airport provide context, while recent days (including a 93°F peak on September 3) reflect a warm pattern without extreme heat. The near-even split between 88–89°F and 90–91°F bins reflects model differences in storm timing and coverage, plus the narrow margin between a suppressed high from early convection versus a brief peak near 91–92°F before cooling. Later updates from the National Hurricane Center or local NWS briefings on tropical moisture and sea-breeze interactions will likely refine these odds ahead of resolution.