Recent National Weather Service and ensemble forecasts indicate Seattle's overnight low on October 3 will likely settle in the low 50s°F under building high pressure, light northerly winds, and mostly clear to partly cloudy skies after patchy morning fog. This pattern follows several days of mild conditions with daytime highs in the upper 60s, well above the early-October climatological average low near 49°F. Model consensus shows limited variability, though minor shifts in cloud cover or wind could nudge the minimum across the 52–54°F range. Trader sentiment remains split between cooler and warmer extremes because resolution hinges on the precise hourly minimum reported by official stations, with new model runs and updated NWS guidance expected over the next 48 hours to refine the outcome.