High pressure over the Pacific Northwest is sustaining above-average warmth for early October in Seattle, with National Weather Service and ensemble guidance pointing to mostly sunny conditions and a daytime high near 70-72°F on October 4. Clear skies will maximize solar insolation while light northerly flow limits marine influence and cloud cover that could otherwise cap temperatures. Minor differences among forecast models hinge on boundary-layer mixing depth and any residual moisture from the recent weak front, creating tight clustering in the 70-73°F range that aligns with the closely matched market-implied probabilities. Updated model runs and NWS briefings over the next 48 hours will refine these thresholds ahead of resolution.