**Trader consensus at 100% for 86-87°F as Houston’s highest temperature on September 17, 2026, aligns with official observations from National Weather Service stations.** Drier northeast air arrived that day, suppressing humidity and limiting afternoon heating compared with prior days that reached the mid-90s. Reports from Houston Hobby and Intercontinental airports recorded highs of 86–90°F, with several sources confirming an 86–88°F peak under mostly clear to partly cloudy skies and light winds. This outcome sits near the late-September climatological average of roughly 89°F, consistent with seasonal cooling trends and the absence of strong southerly flow or moisture that could drive higher readings. Only a significant model error or station discrepancy could have altered the result, but post-event data releases confirmed the narrow range.