Recent forecasts from the National Weather Service and ensemble models indicate overnight lows in Seattle on October 10 will likely settle in the mid- to upper 40s°F amid post-frontal clearing and northerly flow, placing the daily minimum near the long-term October average of 47.9°F. A cold front that crossed the region on October 9 introduced cooler maritime air and showers, with subsequent radiational cooling under partly to mostly clear skies and light winds favoring the lower end of guidance near 44–47°F. However, residual moisture or slightly stronger mixing could limit drops, supporting trader positioning near both the 58°F-or-higher and 39°F-or-below thresholds as model spreads reflect uncertainty in boundary-layer decoupling and exact cloud timing. Historical analogs show October 10 minima ranging from 34°F (2019 record) to the mid-50s, underscoring how small shifts in wind or sky cover can alter the final observed low reported by official stations.