Current forecasts from Brazil’s INMET and global models indicate a typical late-winter pattern over São Paulo, with a subtropical high promoting mostly clear skies and modest daytime heating that favors a maximum near 21–23°C. Weak cold-air advection from the south and limited moisture keep cloud cover low, allowing strong solar insolation to push temperatures toward the middle of the historical August range of 22–24°C, while any increase in southeasterly flow or thin cirrus could cap the peak closer to 21°C. Model spreads remain narrow this close to the event, leaving the tightly bunched market probabilities reflecting uncertainty mainly in boundary-layer mixing and exact timing of any weak frontal approach rather than major synoptic shifts.