National Weather Service ensemble forecasts from the GFS, ECMWF, and NAM models converge on a peak temperature of 85–88 °F at LaGuardia Airport under mostly clear skies that promote strong solar heating and surface warming. This setup creates a substantial positive anomaly relative to New York City’s May climatological average high near 72 °F, driving the market’s overwhelming 99.6 % implied probability for the 88–89 °F bin. Limited afternoon boundary-layer mixing keeps temperature spread narrow and supports the tight trader consensus. Final 3 p.m. observations or any last-minute revisions to mixing depth and timing remain the primary variables that could still shift the exact outcome within the current narrow range.