Recent National Weather Service guidance and ensemble forecasts from the GFS and ECMWF models indicate New York City will likely see daytime highs in the low to mid-80s on May 18, driven by southerly flow ahead of a strengthening high-pressure ridge and minimal cloud cover that favors strong daytime heating. This scientific consensus underpins the closely matched market-implied odds favoring 82–85 °F outcomes, as traders weigh the precise boundary-layer mixing and timing of peak warmth. Small differences in model resolution of afternoon sea-breeze effects or slight moisture variations could nudge the official Central Park maximum by one or two degrees, keeping resolution uncertain until final observations are recorded tomorrow evening.