Current National Weather Service and model guidance point to overnight lows in Miami near 78–80°F on June 17 under the prevailing warm, humid summer regime driven by southeasterly trade winds and scattered nocturnal convection. Recent observations show minima stabilizing in the upper 70s, consistent with climatological baselines for mid-June when sea-surface temperatures and high dew points limit radiational cooling. The near-even split between the 78–79°F and 80–81°F bins reflects modest forecast uncertainty in the precise timing of cloud cover and boundary-layer mixing, with ensemble spreads indicating limited potential for either slight additional cooling or retained warmth depending on thunderstorm outflow timing. No synoptic features such as fronts or enhanced subsidence are expected to shift outcomes outside this narrow range before resolution.