Typical August conditions in Miami feature high humidity and sea surface temperatures near 86–88°F that limit overnight radiational cooling, keeping minimum temperatures clustered around 78–81°F. Recent National Weather Service guidance points to scattered nocturnal thunderstorms and variable easterly flow, which can trap heat under cloud cover or allow brief clear periods for modestly lower readings. Model spreads in dew point and wind forecasts create the tight contest between the 78–79°F and 80–81°F bins, with clearer, drier air favoring the lower outcome and increased convective activity or urban heat retention pushing readings higher. Updated forecast runs through August 7 will refine these thresholds.