**Persistent warm, humid conditions across the Houston area on September 11, 2026, produced overnight lows firmly in the upper 70s.** Official National Weather Service observations at stations such as Hobby Airport recorded minimum temperatures of 78–79 °F, consistent with the surrounding days’ pattern of 78–80 °F lows amid a broad warm air mass. High dew points near 78 °F limited radiational cooling, while light southerly winds and scattered cloud cover from coastal moisture further suppressed temperature drops. No cold fronts or dry-air intrusions occurred to alter the regime. This scientific context—verified surface observations, high humidity, and absence of synoptic cooling—underpins the market’s near-certain consensus on the 78–79 °F bin. The only realistic challenges would involve a station-specific anomaly, revised quality-controlled data showing a slightly lower reading at a secondary site, or an undetected brief clearing that allowed marginally more cooling, none of which align with the broader meteorological picture.