Official National Weather Service observations confirm Miami’s overnight low reached 74–75°F on May 16, driving the near-certain market-implied odds. This outcome reflects persistent warm, humid air advection from the Gulf Stream under light southerly flow, which limited nocturnal radiative cooling despite clear skies. Late-spring climatology for the region typically produces minimums between 72–77°F, and the absence of any frontal passage or unusual subsidence kept temperatures within the narrow historical envelope. Final certified readings from Miami International Airport are expected to lock in resolution without meaningful adjustment.