Recent National Weather Service model guidance for New York City points to an overnight low in the mid-60s on May 18, driven by a warm, moist air mass with limited nocturnal radiative cooling under partly cloudy skies and light southerly winds. This setup favors the leading 66-67°F and 64-65°F bins, which together capture over 60% of trader-implied odds. Historical Central Park normals for mid-May hover near 53°F, so current conditions reflect a notable warm anomaly tied to persistent high pressure and southerly flow that suppresses typical springtime cooling. Key uncertainties include any last-minute increase in cloud cover or a weak frontal passage that could nudge the minimum a degree or two lower before resolution at the LaGuardia Airport station.