Recent National Weather Service and NOAA model guidance indicates a minimum temperature near 57°F for San Francisco on September 3, driven by a persistent marine layer and moderate onshore southwest flow that limits overnight radiative cooling. Typical early-September climatology features average lows around 56°F, with the current setup—partly to mostly cloudy skies, light drizzle chances, and dew points in the mid-50s—favoring readings clustered in the mid-to-upper 50s rather than extremes. Key variables differentiating market ranges include marine layer depth and timing of any clearing, which could allow slightly stronger cooling toward 54–55°F or suppress it near 58–59°F, alongside wind speeds that enhance or reduce mixing. No significant synoptic shifts, such as offshore flow or stronger high pressure, appear imminent before resolution, keeping trader consensus aligned with these stable coastal conditions.