Trader consensus on Polymarket has locked in 68-69°F as the lowest temperature in New York City on April 15, 2026, at 100% implied probability, reflecting the official observation from the National Weather Service's Central Park station (KNYC), the authoritative source for NYC climate records. This unseasonably warm overnight low—well above the April climatological average of around 45°F—stems from persistent high-pressure ridging over the Northeast, fostering clear skies, light winds, and warm air advection from the south, as indicated by recent NOAA model outputs and satellite imagery. No significant cold fronts disrupted the mild pattern in the prior 48 hours. While data revisions are exceedingly rare post-preliminary reporting, a confirmed sensor anomaly could theoretically prompt adjustment, though current evidence strongly supports resolution to 68-69°F. Final NWS daily climate summary expected within days.