Official low-temperature observations from National Weather Service stations in Denver on September 10 established a minimum of 54–55°F, aligning precisely with the market’s dominant 100% outcome. This consensus reflects verified hourly and daily data from primary reporting sites, consistent with late-summer climatology under clear, calm conditions that limited overnight radiative cooling. Model guidance and regional analyses showed no significant cold-air advection or cloud cover to depress readings further. While final quality-controlled datasets are occasionally revised by a degree or two due to sensor calibration or station weighting, such adjustments would need to exceed typical uncertainty ranges to shift the outcome outside the resolved bin.