Official National Weather Service observations for Denver on September 23, 2026, recorded a maximum of 72°F, yet trader consensus has coalesced around the 74-75°F bin at near-certainty due to pre-event forecast models from NOAA and local analyses projecting that narrow range amid cooler-than-normal conditions. This positioning reflects aggregated real-money assessment of surface observations, departure from the 77°F climatological normal, and absence of significant warming mechanisms like downslope winds. Realistic challenges remain limited to post hoc data revisions, alternative station readings at Denver International Airport versus other sites, or measurement timing discrepancies that could shift the recorded high by a degree or two.