**Persistent high humidity and limited overnight radiative cooling under partly cloudy skies with scattered showers are keeping Miami's expected minimum temperature for August 28 clustered in the upper 70s to low 80s.** National Weather Service and private model guidance show dew points near 77–80°F and light easterly winds around 5 mph, which suppress cooling typical for late August and push the overnight low above the 77.5°F climatological average. Variable cloud cover and the timing of any convective activity overnight create the narrow spread across adjacent 2°F bins, with traders assigning roughly equal weight because forecast differences hinge on small changes in moisture and mixing rather than a major synoptic shift. No nearby tropical systems are altering the pattern yet, so resolution will depend on the final 24–48 hours of model updates from NOAA.