Official forecasts from the National Weather Service and private models indicate Miami's overnight low on October 9 will likely fall in the upper 70s, driven by high dew points near 75°F, southeasterly flow off warm Atlantic waters, and scattered thunderstorm activity that limits radiative cooling. This aligns with climatological norms for early October, when average lows reach about 75°F but recent patterns show persistently elevated nighttime readings amid above-normal sea-surface temperatures. Model consensus leaves limited room for sharp drops below 70°F unless an unexpected frontal passage develops, keeping market-implied odds for sub-70°F outcomes sensitive to the next 48-hour forecast updates from NOAA.