Official observations from Seattle-Tacoma International Airport recorded a daily maximum of 67°F on September 14, 2026, under mostly cloudy skies with light winds and no significant precipitation, aligning precisely with the 66-67°F market bin that now holds full implied probability. This outcome sits below the 1991–2020 climatological average high near 71°F and reflects cooler-than-normal early-autumn conditions across the Pacific Northwest. National Weather Service data and preliminary climatological summaries confirm the reading occurred around 2:17 PM local time, with the minimum at 54°F. While station-specific variations or post-analysis revisions remain theoretically possible, the convergence of real-time surface observations and historical verification standards leaves little room for alternative resolution.