National Weather Service forecast guidance and real-time observations at Miami International Airport point to a minimum temperature of 72–73°F tonight, reflecting the market's near-certain 99.7% implied probability for that bracket. Persistent subtropical high pressure over South Florida is suppressing radiational cooling while sea-surface temperatures in the upper 70s maintain a warm boundary layer, consistent with mid-May climatology that places typical overnight lows between 72°F and 76°F. Model consensus from the GFS and ECMWF shows only modest nocturnal drops under light southerly flow, with no fronts or dry-air intrusions expected before sunrise. A late-evening wind shift or unforecast clear-sky enhancement could still nudge readings into the upper 60s, though such deviations remain low-probability outliers given current conditions.