Recent National Weather Service and model guidance points to Miami highs in the mid-to-upper 80s on October 1 amid easterly flow at 10-15 mph and 60-80% chances of showers and thunderstorms, especially afternoon. Persistent tropical moisture and cloud cover from the typical Florida wet-season pattern are the main factors capping temperatures, with storm timing and intensity creating the narrow spread between 84-85°F and 86-87°F outcomes. Heavier or earlier convection favors the lower bin by limiting insolation, while any breaks in coverage could push readings toward the higher range. Historical October averages near 85-86°F provide context, but the current unsettled regime and short-term forecast updates from NOAA will determine the final observed maximum.