Official National Weather Service observations from the primary New York City station recorded a daily minimum of 66–67°F on June 15, 2026, anchoring the market at 100% probability for that bin. This outcome aligns with the observed nocturnal cooling under clear skies and light winds typical of mid-June high-pressure ridging, where radiative heat loss produced lows near the seasonal average of 62–68°F at LaGuardia. Model guidance from the prior 48 hours showed tight consensus around this range with minimal spread, confirming the result before final verification. Only a rare station calibration error or unreported microclimate anomaly at the official site could alter resolution, both of which fall well outside historical precedent for this market.