Recent forecast model runs from agencies including the Met Office and local Brazilian meteorological services indicate a frontal boundary and widespread cloud cover with light rain will limit daytime heating in São Paulo on October 6, favoring a maximum near 23–24 °C. Persistent northeasterly flow and high humidity (70–90 %) will further suppress surface temperatures below the early-October climatological mean of ~26 °C. Model spread arises mainly from timing of convective cells and boundary-layer mixing; stronger insolation gaps could push readings to 25 °C, while heavier rainfall would cap them near 22 °C. Updated model guidance and real-time observations from Congonhas and CGE stations on the day itself will determine the precise peak before market resolution.