Recent model runs from the National Weather Service and European Centre for Medium-Range Weather Forecasts show substantial spread in overnight radiative cooling for New York City on July 23, with ensemble lows clustered between 62–70°F. A weak frontal boundary and variable low-level moisture are limiting clear-sky conditions that would otherwise drive temperatures toward seasonal normals near 69°F, while subtle differences in wind direction affect advection of cooler maritime air. This genuine forecast uncertainty keeps implied probabilities tightly bunched around the 64–67°F and 68–69°F bins, each near 36 percent. Traders are watching the next NWS update and 00Z model suite for any tightening of dewpoint or cloud-cover guidance that could shift the distribution.