National Weather Service ensemble guidance and recent GFS-ECMWF model runs indicate a daytime high near 77°F for New York City on May 16 under a strengthening high-pressure ridge that favors clear skies and light southerly flow. This meteorological pattern supports the market-implied 98.3% consensus on a 76-77°F peak, placing the outcome modestly above mid-May climatological norms without crossing into the 80°F threshold. Minor upward revisions remain possible from localized urban heat island effects or slight shifts in mixing depth, though official LaGuardia Airport observations are expected to resolve the market by evening. Traders weigh these consistent forecast signals against inherent model uncertainty in afternoon temperature evolution.