Miami's subtropical climate and typical June nocturnal conditions anchor overnight lows in the upper 70s, with forecast models and recent observations showing minimal cooling due to high humidity, frequent afternoon thunderstorms, and urban heat retention. Current extended guidance for June 16 points to a low near 78°F amid scattered showers and southerly flow, consistent with historical normals of 76–80°F and the absence of any significant cold-air intrusion or clear-sky radiative cooling. Trader positioning around the 78–79°F outcome reflects this tight climatological band, while adjacent brackets capture forecast uncertainty from model spreads on cloud cover and moisture. No major shifts in steering patterns or tropical moisture have altered the outlook in the past several days.