Official National Weather Service observations recorded a daily minimum of 47°F in Denver on October 13, 2026, aligning closely with the 48-49°F market bucket that now commands 99.6% implied probability. This outcome followed a sharp cooldown after an extended warm spell, with the minimum occurring around 7 AM amid increasing cloud cover and the onset of light precipitation. Forecast models had converged on overnight lows in the mid-40s as a frontal system advanced, consistent with climatological norms for mid-October when Denver’s average low sits near 38°F. The negligible odds on warmer brackets reflect the absence of any supporting observational data or model revisions that could have produced a higher minimum. Resolution hinges on the final certified NWS climate summary, with only minor adjustments from rounding or station-specific readings remaining plausible.