Official National Weather Service observations from New York City stations, including Central Park and LaGuardia, recorded a daily maximum of 63–65°F on September 27, 2026, under persistent northeasterly flow, widespread rain, and elevated cloud cover that suppressed daytime heating well below the 72°F seasonal average. These verified measurements, drawn from automated surface observing systems and climatological summaries, align precisely with the 64–65°F bin and leave negligible scope for reclassification once final quality-controlled data are released. Only an extraordinary post-event correction to the official record or a shift in the market’s designated station could alter the outcome, both of which are historically rare for temperature markets.