Official National Weather Service observations for October 10, 2026, recorded a daily maximum temperature in the 56-57°F range at Seattle-area stations, driving the market's near-certain consensus on that outcome. Below-normal highs resulted from persistent marine influence, light rain, and extensive cloud cover that limited daytime heating well below the 1991-2020 October average of 62-63°F. These conditions aligned with typical late-autumn Pacific Northwest patterns, where onshore flow and stratiform clouds suppress temperature extremes. Trader positioning reflects the finality of verified station data, with negligible odds on adjacent bins underscoring the precision of the recorded peak. Only a post-event data revision or differing station weighting could realistically alter resolution, though such changes remain improbable given multiple confirming reports.