**High pressure building over the Pacific Northwest, combined with offshore flow and northerly winds, is driving expectations for above-average warmth in Seattle on October 15.** Official National Weather Service guidance and multiple model runs project a mostly sunny Thursday with a high near 70°F, well above the historical average of about 60°F. This setup follows a weak frontal passage earlier in the week that left clearer skies and allowed temperatures to climb into the mid-60s to lower 70s range. Trader sentiment, reflected in the 35% implied probability for 70-71°F, closely tracks these consistent forecasts from NWS Seattle and supporting sources showing minimal precipitation risk and light winds. Shorter-range uncertainty around exact peak values keeps secondary bins like 68-69°F and cooler outcomes active, though the ridge-dominated pattern favors the upper end of the distribution. Updated model runs and NWS briefings ahead of the date remain the key near-term catalysts.