Forecast consensus from the National Weather Service and major models points to a high of 89–90°F in Miami on August 27, driven by typical late-summer conditions with southeast winds, high humidity, and a 50% chance of afternoon thunderstorms that cap daytime heating. This aligns closely with the 1991–2020 climatological average high of 90.5°F and recent model runs showing no strong ridging or cold front to push temperatures outside the 88–92°F window. Heat indices near 105°F reflect abundant moisture rather than extreme air temperatures, while scattered cloud cover and sea-breeze effects further moderate peaks. Updated NWS guidance and ensemble spreads released overnight reinforce trader focus on the 90–91°F bin as the most probable outcome.