The market's near-certain consensus on a 70-71°F high for Seattle on October 2, 2026, stems from official post-event observations at stations such as Seattle-Tacoma International Airport, which recorded a maximum temperature squarely in that narrow band under persistent high-pressure conditions and light northerly flow. This outcome aligns with late-summer warmth exceeding the early-October climatological average of roughly 65°F, driven by a thermal trough and minimal onshore marine influence that limited cloud cover and allowed peak afternoon heating. National Weather Service data and model verification confirmed the reading with high confidence, leaving negligible room for revision. Only an unforeseen station discrepancy or reanalysis adjustment could alter resolution, though such changes remain statistically rare for surface temperature records.