Recent forecast consensus from models including Met Office and regional sources indicates a maximum of 24–28°C for São Paulo on October 4 amid spring transition, with trader odds clustering tightly around 24–27°C reflecting model spread. Cooler-than-average conditions earlier in the week, driven by increased cloud cover, light rain, and northeasterly flow moderating daytime heating, have tempered expectations below typical October highs near 26°C. Key variables include timing of convective showers, boundary-layer moisture, and subtropical high-pressure positioning, which can suppress or enhance insolation by several degrees. Updated runs closer to the date will clarify resolution thresholds as atmospheric conditions evolve.