**The market's near-certain pricing on 100-101°F reflects the official National Weather Service observation of a 101°F maximum at Dallas/Fort Worth International Airport on September 9, 2026.** The NWS climatological report recorded this high at 4:06 PM CDT, tying the daily record from 1954 and exceeding the 1991–2020 normal of 91°F by 10 degrees. Persistent high pressure, southerly flow, and minimal cloud cover sustained the heat during a prolonged dry spell with no measurable precipitation. This outcome aligns precisely with the 100-101°F resolution bin. While final official reports are rarely revised, any subsequent data quality review or station-specific adjustment could theoretically alter the recorded value, though historical precedent shows such changes are uncommon once the preliminary local climatological data are issued.