Trader consensus has locked in 36-37°F as the highest temperature in New York City on March 18, driven by official National Weather Service observations at Central Park recording a high of 37°F amid persistent cold snaps from Arctic air masses. Supporting evidence includes aligned GFS and ECMWF model runs forecasting daytime highs in the mid-30s under partly cloudy skies with light winds, consistent with March climatology where NYC averages 47°F but often dips lower during late-winter outbreaks. This positioning reflects verified measurements from automated stations, minimizing uncertainty. Realistic challenges would require a post hoc data revision from NOAA—highly improbable given standardized quality controls—or an unreported microclimate spike, both with near-zero odds.