Recent forecast guidance from regional models positions Sao Paulo’s August 26 high near 22–23 °C, aligning with the tight market clustering around those outcomes. In the Southern Hemisphere winter, subdued solar angles and variable subtropical ridging typically limit afternoon maxima to the low-to-mid 20s Celsius. Differentiating factors include the precise timing and coverage of any late-day showers or increased cloudiness, which can suppress peak temperatures by 1–2 °C through reduced insolation, alongside subtle shifts in low-level moisture and boundary-layer mixing. Updated CPTEC and global ensemble runs over the next 24 hours will refine these details, while historical climatology places late-August averages near 21–22 °C with a standard deviation of roughly 2 °C.