National Weather Service observations at New York City's official Central Park station have already recorded a high of 80°F on March 31, 2026, well exceeding the 74°F threshold and driving trader consensus to 100% implied probability for that outcome. This extreme warmth stems from a persistent high-pressure ridge ushering southerly warm air advection under clear skies, following a month of above-normal temperatures including record 80°F on March 10. Compared to the March climatological normal high of around 52°F, today's reading shatters expectations, with minimal cloud cover and light winds aiding solar heating. Final certification in the NWS daily climatological report, typically issued early April 1, could theoretically revise data due to rare sensor anomalies, but such changes are exceedingly unlikely given multiple confirming observations.