Trader consensus has locked in 22°C as the highest temperature recorded in Sao Paulo on September 9, driven by official daily observations from the Brazilian National Institute of Meteorology (INMET) confirming a maximum of exactly that value. Early September climatology in the region features stable subtropical high pressure and moderate insolation, producing typical highs near 22–24°C without active fronts or heat advection. With the full 24-hour observation window now closed and preliminary station data publicly available, market-implied odds reflect the absence of measurement uncertainty or pending revisions. Only an unlikely post-publication correction to raw station logs or a change in the precise reporting methodology could alter the outcome, though such adjustments occur infrequently after initial verification.