Current forecast guidance from the National Weather Service and major models points to Miami’s daily low on August 13 settling near 79–81 °F, driven by high subtropical humidity, light easterly trade winds, and modest overnight cloud cover that limits radiational cooling. Sea-surface temperatures in the upper 80s °F around South Florida provide a warm boundary layer that resists sharper drops, while any scattered showers or increased low-level moisture could nudge the minimum a degree lower. Ensemble spreads remain narrow, reflecting typical late-summer variability rather than major synoptic shifts, which explains why traders assign nearly equal weight to the 78–79 °F and 80–81 °F bins. Updated model runs tonight and early-morning observations will refine the exact threshold before resolution.