**Trader sentiment for the July 31 highest temperature in São Paulo centers on a tight cluster around 24–25°C, reflecting forecast model consensus near 23°C amid typical mid-winter conditions.** Official guidance from the Met Office and timeanddate.com indicates a daytime maximum of about 23°C under overcast or partly cloudy skies, consistent with July climatology of 21–22°C highs at the Guarulhos reference station. Recent model runs show limited variability from subtropical high pressure, light winds, and modest solar heating, with minimal precipitation risk keeping temperatures stable. The near-even split between 24°C (30.5%) and 25°C (31.5%) highlights uncertainty in peak timing, urban heat island effects, and small run-to-run differences in global models such as GFS and ECMWF. Lower outcomes (23°C and below) receive less weight because current guidance points slightly above long-term averages, while 26°C+ remains a low-probability tail given the season and lack of warm advection. Updated model outputs and any last-minute shifts in cloud cover or wind patterns ahead of the 31st will be the key near-term drivers.