Current forecast models indicate a likely maximum temperature range of 20–25°C for São Paulo on August 26, driven by persistent cloud cover, late-day showers, and moderate humidity levels that limit daytime heating. Climatological baselines for late August place average highs near 21–23°C, but small variations in incoming solar radiation under overcast skies or shifts in the timing of precipitation can easily differentiate outcomes within this narrow band. Official guidance from agencies such as INMET and global ensembles shows consensus on mild conditions without strong frontal passages, leaving resolution sensitive to microscale factors like afternoon clearing or wind speed. Trader odds reflect this genuine forecast uncertainty rather than any single dominant catalyst.