Recent National Weather Service guidance and ensemble model runs show a persistent marine layer with morning low clouds and fog over coastal Los Angeles, followed by gradual afternoon clearing under southwest flow, producing daytime highs most likely in the upper 70s to low 80s. This setup, typical for mid-September, limits surface heating through evaporative cooling and onshore advection of cooler marine air, with the precise peak depending on fog dissipation timing, sea-breeze strength, and any inland thermal trough development. Trader consensus around the 78–81°F bins reflects this narrow uncertainty range, while lower-probability warmer outcomes would require faster clearing or reduced marine influence. Updated NWS point forecasts and next model cycles will refine the expected maximum before tomorrow’s observation at official stations.