Recent National Weather Service and ensemble model guidance points to a high near 70°F in Seattle on October 2 under partly cloudy skies, light northerly flow, and building high pressure that favors daytime warming above the 65°F climatological average. Trader consensus, reflected in the closely matched 34.5% and 32.5% implied probabilities for the 70–71°F and 68–69°F bins, centers on this narrow range because small differences in cloud cover, boundary-layer mixing, or marine-layer timing can shift the daily maximum by a degree or two. Historical records show October 2 highs have reached the upper 70s only rarely, while model spread remains modest this close to the date, limiting the odds assigned to outcomes outside 66–73°F. Updated short-range guidance expected over the next 48 hours will likely refine the exact peak.