Official National Weather Service observations at Houston Hobby Airport recorded a minimum temperature of 79°F on September 15, 2026, anchoring the market at 100% implied probability for the 78–79°F bin. Persistent warm, humid conditions driven by southeasterly flow from the Gulf kept overnight lows elevated, with heat indices remaining high and no significant frontal passage or radiational cooling event to drop temperatures further. This reading exceeded the 1991–2020 climatological average low of roughly 73°F for the date. Trader consensus reflects the finality of verified station data, with realistic challenges limited to rare post-event record revisions or use of an alternate official site, both improbable given standard resolution criteria.