National Weather Service forecasts and ensemble model consensus point to a daytime high in Miami in the mid-80s on May 17 under partly cloudy skies and light easterly flow typical of late spring. This supports the market's overwhelming 99.7% implied probability on the 86-87°F range, as afternoon solar heating remains moderated by cloud cover and humidity levels near seasonal norms. Historical May maxima around 87°F at Miami International Airport further reinforce the positioning, with limited high-pressure ridging reducing the chance of stronger warming. Updated model runs this morning align closely with these conditions ahead of the evening observation window. Only unexpected late-day clearing could realistically push readings into the upper 80s or higher, though such shifts appear unlikely given current guidance.