Traders assign the highest implied probability to a 22°C peak in São Paulo on June 14 because mid-June climatology and current forecast guidance from regional models place the daily maximum near the long-term average high of 21–22°C. Persistent high pressure and light northerly flow have limited cloud cover and allowed modest daytime heating, while a weak cold front passage earlier in the week kept moisture and instability low enough to prevent stronger cooling. Ensemble runs show only modest spread around this central value, with a few members reaching 23°C if insolation increases slightly and others holding at 21°C under lingering boundary-layer moisture. No major synoptic shift is expected before evening, keeping resolution thresholds tightly clustered around these levels.