Trader consensus on Polymarket reflects tight uncertainty in short-range forecasts for São Paulo's highest temperature on April 6, with models clustering around 27–29°C amid variable cloud cover and sea breeze influences. Climatempo's latest guidance projects a 28°C peak under mostly cloudy skies with sun breaks and zero precipitation risk, aligning with the leading 29% implied probability, while ensemble spreads from GFS and ECMWF introduce differentiation—clearer intervals could push toward 29°C, persistent overcast favoring 27°C. April climatology averages 25–27°C highs in the city's urban heat island at Guarulhos airport station, but recent stable subtropical high pressure has kept conditions mild without major fronts. New model runs expected daily through April 5 will likely sharpen odds ahead of resolution.