**High pressure and clear skies drove Seattle's overnight low into the mid-50s on October 14, 2026, producing the market's overwhelming 97.5% consensus on 54-55°F.** Official observations from Sea-Tac and Boeing Field stations recorded minimums near 51-52°F under calm to light northerly winds and minimal cloud cover, consistent with National Weather Service guidance for a stable air mass that limited radiative cooling. Historical October averages (around 47°F) and the absence of a strong cold front or marine intrusion kept temperatures elevated. Only a significant measurement revision at the resolution station or an undetected microclimate effect could realistically shift the outcome, though both remain low-probability given the tight model agreement and surface data.