Official National Weather Service observations from Houston/Hobby Airport recorded a daily maximum of 91°F on September 5, 2026, reached in the mid-afternoon under partly cloudy skies with light southeast winds and isolated thunderstorms. This aligned precisely with the 1991–2020 climatological normal high of 91°F and fell well below historical extremes for the date, such as the 107°F record from 2000. Multiple airport stations and real-time reports converged on a 90–91°F peak, producing the market's near-certain 100% implied probability for that bin. Revisions to final quality-controlled data or substantial differences between primary stations could theoretically alter resolution, though such adjustments are rare once preliminary readings stabilize.