Recent National Weather Service ensemble forecasts and regional model guidance indicate a daytime high in the low-to-mid 80s for New York City on May 18, driven by southerly warm-air advection ahead of a departing high-pressure system. This positions the 80–81 °F and 82–83 °F bins as the tightest market leaders because most deterministic runs cluster near 81 °F while spread among members allows for a modest chance of 84 °F or slightly cooler 78 °F outcomes. Mid-May climatology for Central Park places the normal high at 74–76 °F, so the current setup represents above-average warmth tied to a building ridge and minimal cloud cover that will limit diurnal cooling. Traders are weighting the latest 12Z and 18Z model cycles most heavily, with resolution hinging on the final observed maximum at the official Central Park station.