Recent National Weather Service and ensemble model guidance points to an overnight low in the mid-60s for New York City on September 8 under clear to partly cloudy skies and light northwest flow behind a departing high-pressure system. These conditions favor moderate radiative cooling overnight, with dew points in the upper 50s limiting further temperature drops while daytime heating pushes highs into the low 80s. Historical September averages place the typical minimum near 64 °F, and current runs show limited model spread around this baseline, keeping probabilities clustered across the 60–71 °F ranges. Any late-model shift toward stronger northerly advection or increased cloud cover could lower the minimum into the upper 50s, while persistent calm and dry air would support readings closer to 68 °F.