Recent National Weather Service guidance points to a daily high near 87°F in Miami under partly sunny skies with a modest chance of afternoon thunderstorms, anchoring the market’s strong preference for the 86-87°F and 88-89°F ranges. These values sit squarely within Miami’s late-May climatological average of 85°F, where abundant solar heating, high boundary-layer moisture from the Atlantic, and the typical sea-breeze circulation drive afternoon maxima. Model spread remains limited, with most guidance showing only minor differences tied to the exact timing and coverage of convective clouds, which can shave a degree or two from peak readings. Official resolution will use Miami International Airport observations, so any late-day thunderstorm development remains the chief variable that could tilt final temperatures toward either side of 87°F.