Recent National Weather Service and model guidance points to an overnight low near 80–82°F for Miami on August 27, driven by persistent easterly flow, dew points in the mid-70s, and scattered cloud cover that limits nocturnal radiative cooling. High humidity and light winds inhibit strong surface inversions typical of drier air masses, keeping temperatures elevated relative to the late-August climatological average of about 77–78°F. Trader sentiment clusters on 78–81°F outcomes because forecast variability hinges on the timing and coverage of thunderstorms, which can either enhance or suppress overnight temperature drops depending on cloud persistence. Clearer breaks could allow marginal additional cooling toward the lower bin, while continued moisture and urban heat retention favor the upper side. Updated model runs and NHC briefings through the day will refine these thresholds ahead of market resolution.