Official National Weather Service observations from the Atlanta Hartsfield station established the October 14 minimum at 62-63°F, driving the market's 100% consensus on that bin. Clear skies and calm winds promoted strong nocturnal radiative cooling, with the low forming near dawn as surface heat escaped rapidly under a stable high-pressure regime. This aligns with seasonal norms where mid-October lows average around 55°F, though recent dry conditions enhanced the drop. Any post-event station calibration or data revision remains possible but improbable given alignment with real-time readings and model consensus.