Recent National Weather Service forecasts and ensemble model consensus indicate a sunny Sunday with a high near 61–64°F in San Francisco, driven by moderate onshore westerly flow and a shallow marine layer that limits daytime warming despite clear skies. Trader sentiment clusters tightly around the 64–67°F bins because small differences in predicted wind speed, boundary-layer mixing, and exact clearing time can shift the afternoon peak by 2–3°F; stronger afternoon gusts enhance evaporative cooling and cap the maximum, while lighter flow allows slightly greater insolation. Historical October averages near 71°F provide context, but the current pattern favors below-normal values, leaving the 68°F+ outcomes as lower-probability outliers unless models trend warmer in the final 48-hour updates.