Typical late-summer subtropical conditions in Miami, marked by elevated dew points near 75°F and persistent humidity, limit nocturnal radiative cooling and support overnight lows clustering in the upper 70s to low 80s. National Weather Service and AccuWeather guidance through mid-August show daily lows averaging 78–82°F, consistent with climatological norms where urban heat retention and minimal wind prevent drops below 76°F. Recent heat advisories and highs approaching 94–96°F have sustained this pattern without introducing cooler air masses or increased cloud cover that could alter the trajectory. Trader consensus on the 80–81°F bin at 38.5% reflects these stable model runs, with the 78–79°F range as the nearest alternative should enhanced sea breezes or scattered convection enhance cooling on the 19th.