Official surface observations from National Weather Service stations, including Seattle-Tacoma International Airport, recorded a daily maximum temperature of 60-61°F on October 13, 2026, under mostly cloudy skies with light southerly winds and minimal diurnal heating. This outcome aligned closely with model consensus from prior days, reflecting typical early-autumn conditions near the climatological average high of about 61°F. With the date now past, final quality-controlled data from multiple automated and manual sites locked in the range, producing the market's 100% implied probability. Minor challenges could arise only from rare post-processing revisions or station-specific microclimate differences, though cross-verification makes such shifts improbable.