Current National Weather Service and ensemble forecasts indicate sunny skies and a building upper-level ridge over the Pacific Northwest, supporting daytime highs near 60–63°F for Seattle on October 12 under light winds and dry northeasterly flow. This aligns with the market’s tight split between the 62–63°F and 60–61°F bins, as small differences in peak timing, local urban heat effects, or minor model spread in boundary-layer warming can shift the exact maximum across those thresholds. Historical climatology places the October 12 average high at 61°F, providing a baseline traders weigh against the stable, clear-air setup expected through Monday. Updated model runs and any late adjustments to the ridge position remain the key near-term variables.