Current National Weather Service and European model consensus for Miami projects a daytime high of 85–87°F on May 18, driven by typical late-spring subtropical conditions featuring light easterly flow, boundary-layer moisture, and scattered afternoon thunderstorms that limit extreme heating. These factors align with climatological averages for mid-May, when daily maxima rarely exceed 88°F absent a strong ridge or stalled front. Recent ensemble runs show minimal spread, with only modest uncertainty from cloud-cover timing that could trim the peak by 1–2°F or allow brief clearing to push it toward 88°F. Trader-implied probabilities therefore concentrate on the 86–89°F bins, reflecting both historical precedent and the absence of any synoptic feature capable of producing a notable outlier.