Current ensemble forecasts from NOAA and private models indicate overnight lows in the low 70s for New York City on August 20, driving the tight clustering of market-implied odds between the 70–73°F bins. Persistent warm, humid air with elevated dew points is limiting nocturnal radiative cooling, while light winds and possible partial cloud cover introduce modest uncertainty in the exact minimum. This aligns with the broader late-summer pattern of above-average temperatures across the Northeast, reducing the likelihood of sharper drops below 70°F unless an unexpected frontal passage develops overnight. Updated model runs and observations through the evening will refine the precise threshold.