High pressure dominating South Florida, combined with drier air and mostly clear skies, is limiting nocturnal radiative cooling and anchoring the expected minimum temperature for Miami on August 12 near 79–81°F. National Weather Service guidance and model consensus point to overnight lows in this range amid easterly flow and minimal cloud cover, consistent with historical mid-August norms around 78°F but slightly elevated by the current ridge. Trader sentiment clusters on 78–81°F bins because small forecast adjustments in dew points or boundary-layer mixing could shift the reading by 1–2°F, while probabilities drop sharply outside this window given the stable pattern and lack of tropical moisture or frontal influences. Updated NHC and local model runs tonight will refine the final range ahead of resolution.