Persistent subtropical high pressure and elevated Atlantic sea-surface temperatures sustain Miami’s typical July nocturnal regime, with National Weather Service guidance centering overnight lows near 79–81 °F. High boundary-layer moisture and light southeast flow restrict radiative cooling, while scattered afternoon convection can increase cloud cover and further elevate minimum temperatures. Model consensus shows only modest spread in the 78–82 °F envelope for July 7, keeping the 78-79 °F and 80-81 °F bands nearly tied; slight differences in forecast dew-point depression or timing of any sea-breeze front account for the narrow edge separating adjacent 2 °F bins. Updated evening soundings and short-range ensembles will refine the final resolution.