Official observations from Denver International Airport recorded a daily high of 81°F on October 4, 2026, under clear skies with light winds and minimal cloud cover that permitted strong daytime heating. This exceeded the 1991–2020 climatological average high of 71°F by roughly 10°F, consistent with recent model guidance showing above-normal temperatures across the Front Range. The 100% market-implied probability for the 80–81°F bin reflects confirmed surface data from National Weather Service stations, leaving little room for revision. Only a significant post-analysis adjustment to the official record or use of an alternate measurement site could alter resolution, though such changes are rare for well-monitored urban airports.