Latest National Weather Service forecasts for Seattle on September 26 indicate a high in the low to mid-60s°F under mostly sunny skies following the passage of an upper-level trough and frontal system on the 25th. Model consensus supports modest warming with light northwesterly flow and minimal cloud cover after overnight clearing, though exact maxima remain sensitive to boundary-layer mixing and any residual marine influence. This positions the 62-63°F bin as the market leader, consistent with recent observed highs in the upper 50s to low 60s amid below-normal late-September conditions. Historical climatology shows an average high near 67°F, but current steering patterns and post-trough stabilization favor cooler outcomes. Updated model runs and morning observations will refine probabilities ahead of the daily maximum.