Current forecasts from the National Weather Service and ensemble models place Miami's high temperature on May 19 near 86–89°F, aligning with the closely matched market-implied odds for the 86–87°F and 88–89°F bins. A persistent subtropical ridge is promoting mostly sunny conditions and light easterly flow, yet increasing low-level moisture and sea-breeze convergence could trigger scattered afternoon showers that limit peak heating. This setup sits slightly above the May climatological normal of 85–86°F at Miami International Airport, with recent daily highs near 88–91°F providing a warm baseline. Traders are weighing the balance between continued ridge influence and the timing or intensity of any convective cooling before the 19th resolution window.