Traders are balancing forecast uncertainty for Miami's October 17 overnight low, with closely matched probabilities across 70–85°F bins reflecting divergent model guidance on a potential cool front. The National Weather Service and ensembles such as the GFS and ECMWF indicate variable timing and intensity of northerly winds that could enhance radiative cooling and lower humidity, versus persistent southerly flow or cloud cover that would keep readings closer to seasonal norms near 72°F. Key variables include sea-surface temperatures in the adjacent Atlantic and Gulf, frontal speed, and boundary-layer moisture. Fresh model runs and buoy observations over the next 48 hours should narrow the spread and shift the market-implied odds.