**Trader consensus centers on a daily maximum of 90–91°F (48.5% implied probability) for Miami on August 4, 2026, with 88–89°F (27.5%) and 92–93°F (16.5%) as the next most probable bins.** Official National Weather Service guidance and ensemble forecasts from NOAA point to a high near 90°F under partly to mostly cloudy skies, with scattered afternoon thunderstorms typical of the subtropical summer regime. These storms, driven by daytime heating and sea-breeze convergence, often cap temperatures by increasing cloud cover and bringing brief cooling rain, keeping readings within the narrow 88–93°F envelope that dominates the market. Climatologically, Miami’s early-August normals sit near 91°F at Miami International Airport, but the ongoing wet pattern—persistent moisture from a stalled frontal boundary and above-average Atlantic sea-surface temperatures—favors slightly suppressed maxima relative to the July heat wave. Recent model runs show limited variability, with most guidance clustered around 89–91°F and only modest upside risk if convection remains suppressed. Afternoon sea breezes and high humidity further constrain extreme outliers, explaining why probabilities above 93°F or below 88°F remain below 10% combined. Updated NWS briefings and any late-morning radar trends will be the next key catalysts for market movement.