Forecast consensus from National Weather Service guidance and ensemble models places NYC's minimum temperature on July 21 near 70–74 °F under mostly clear skies and light southerly flow, producing the tight clustering of market probabilities across the 70–75 °F bins. Recent model runs show modest spread driven by uncertainty in nocturnal boundary-layer mixing and the strength of the urban heat island effect around Central Park, while climatological norms for mid-July lows near 69 °F provide a baseline. Any last-minute shift in cloud cover or wind speed could nudge the realized minimum across the 2 °F resolution thresholds, keeping trader focus on updated 00Z and 12Z model cycles through tomorrow morning.